CN100457212C - Administration instrument for medical use - Google Patents

Abstract

It is intended to provide an administration instrument for medical use whereby a drug solution can be safely injected at a high reliability. Using this instrument, for example, a needle can be prevented from sticking deeper into the skin due to the force applied for pressing an injection button and, at the same time, maintained without shaking to ensure stable administration, thereby relieving physical and mental pains of a patient. Owing to the structure wherein an injection button (3) is pressed from an angle not parallel to the direction along which a needle (4) sticks into the skin, the needle can be prevented from sticking deeper into the skin than the level at the beginning due to the force applied for pressing the injection button, thereby ensuring stable administration.

Description

medical drug delivery device

This application is a divisional application of the application filed by Matsushita Electric Industry Co., Ltd. on December 13, 2002 with the title of invention "medical drug delivery device" and application number 02824803.1.

technical field

The present invention relates to a medical drug delivery (administration) device used when drug solutions such as insulin are administered.

Background technique

Conventionally, medical dosing devices are mostly used for administering liquid medicines such as insulin or hormone preparations. In general, the injection needle, syringe body, and injection button of this kind of medical drug delivery device are arranged roughly on a straight line, and the structure is such that the injection button parallel to the injection needle is used to squeeze out the injection liquid of the liquid medicine cartridge built in the syringe body. . 24 and 25 show two representative conventional examples thereof.

In Fig. 24, 201 is the main body of the medical drug delivery device (hereinafter also referred to as the syringe body), 202 is the injection liquid inhaled inside the medical drug delivery device main body 201, 203 is the injection button, 204 is the injection needle, and 205 is the Injection button 203 is connected to a plunger that directly extrudes injection fluid 202 portion.

An injection solution 202 is filled in the syringe main body 201 . When administering the injection, the injection needle 204 is pierced into the skin, and the injection button 203 is pushed to squeeze out the injection 202 in the main body 201 of the medical administration device. Furthermore, the dosage of the injection liquid 202 is determined by increasing or decreasing the pushing amount of the injection button 203 .

When the user (patient) pushes the injection button 203 , the inner plunger 205 moves, and the injection liquid 202 is squeezed out from the injection needle 204 . The amount of injection solution administered is determined by the sliding amount of the plunger 205 . The administerer (patient) decides the amount of injection 202 to be administered, inserts the injection needle 204 into the skin to be injected, and pushes the injection button 203 to complete the injection. At this time, when the injection needle 204 enters the skin, the administerer (patient) must determine the amount of the injection needle inserted into the skin based on past experience or the like.

As shown in Fig. 24, the medical drug delivery device used for such self-administration is mostly in the form of a mechanical pen, but since the injection button is pushed in the same direction as when the injection needle is first inserted into the skin, the drug delivery state can be unstable. Correspondingly, recently, as shown in Figure 25, someone has designed a part that can solve the above-mentioned problems, set a part in contact with the skin near the injection needle, determine the position of the injection needle and the skin, and improve the drug delivery. A medical dosing device with a sense of stability in the state.

In Fig. 25, 301 is the main body of the medical drug delivery device, 303 is the injection button, 304 is the injection needle, 306 is the skin contact part that contacts the skin when using the existing medical drug delivery device to inject the injection solution, and 307 is the The liquid medicine cartridge, 302 is the injection liquid in the liquid medicine cartridge 307 .

When administering the medicine, the skin contact portion 306 is brought into contact with the skin, the injection needle 304 is inserted into the skin, the injection button 303 is pushed, and the injection solution 302 in the medicine solution cartridge 307 is squeezed out. And, the dosage is determined by adding or subtracting the pushing amount of the injection button 303 .

In addition, in most existing medical drug delivery devices, the injection needle is installed on the drug delivery device body before the actual injection, and in order to prevent the injection of air mixed in the injection, a so-called air shot (hereinafter also referred to as injection) is performed. called exhaust), and then inject a determined amount of medicinal liquid into the human body.

The external view is a conventional medical drug delivery device shown in FIG. 24 . When injecting a drug solution, it is possible to push the injection button or the drug delivery button while forgetting to install the injection needle on the drug delivery device body. Therefore, it is also possible to push the injection button or the drug delivery button unintentionally, causing some unpleasant things.

In addition, in the existing medical dosing apparatus, although the doctor diagnoses and provides instructions such as the amount of injection to be administered and the interval between administrations, and the user performs self-administration of the medicine according to the instructions, the amount of injection and the interval between administrations are Let the drug user control it himself. In addition, the doctor regularly diagnoses, and based on the diagnosis result, the amount of injection liquid administered in the past, and the interval of administration, determines the amount of injection liquid to be administered, the interval of administration of administration, and gives instructions.

Most of the conventional medical drug injectors used for self-administration are mechanical as shown in FIG. 24 or FIG. 25 , but recently, medical drug injectors incorporating electronic devices have been designed.

Figure 26 and Figure 27 show its representative structure. In addition, Fig. 28 shows a block diagram centering on a microprocessor. FIG. 26 is a front view, and FIG. 27 is a plan view showing a partial cross section.

In FIG. 26 , 403 is a syringe main body, 401 is an injection needle, 404 is a display unit, 405 is an indicator for setting an injection amount, and 406 is an injection button.

In FIG. 27 , a drug solution cartridge 407 filled with an injection solution 426 is fixed to the syringe main body 403 . The administerer pulls out the injection button 406 before injection. When the injection button 406 is pulled out, the sleeve 418 and the nut 412 slide in the same direction as the injection button 406 together with the injection button 406 .

Since the sleeve 418 slides, the spline portion 416 of the sleeve 418 is connected to the spline portion 417 of the dosage setting indicator 405 . Although the sliding direction of the connection part of the sleeve 418 and the plunger 408 is not fixed, the rotational direction is fixed. In addition, the connection part of the sleeve 418 and the nut 412 is not fixed in the rotational direction, but is fixed in the sliding direction.

As a result, since the doser rotates the dosage setting indicator 405, the sleeve 418 rotates, and the plunger 408 also rotates accordingly. The plunger 408 slides. The amount of injection solution to be administered is determined by the sliding amount of the plunger 408 . If the injection button 406 is not pulled out, the sleeve 418 is not connected to the dosage setting indicator 405, and the plunger 408 does not move even if the dosage setting indicator 405 is rotated.

The user rotates the dosage setting indicator 405 to determine the dosage of the injection solution, inserts the injection needle 401 into the place to be injected, and pushes the injection button 406 to complete the injection. At the end of the injection, the injection button 406, the sleeve 418, and the nut 412 slide in the pushed-in direction. At this time, in order to detect that the injection button 406 , the sleeve 418 , and the nut 412 have slipped, a protrusion 420 is provided on the sleeve 418 , and a switch 413 that is turned on or off by the protrusion 420 is fixed to the main body 403 .

When the injection button 406 is pulled out, the switch 413 is turned on, and when the injection button 406 is pushed in, the switch 413 is turned off. The end of the injection can be detected by looking at the state of the switch 413 . The mechanism for judging the end of the injection from the state of the switch 413 is judged by judging the conduction state of the switch 413 using the microprocessor 425 in FIG. 28 or the like.

In addition, 417 is a spline part of the setting indicator 405, 419a and 419b are optical sensors, 414 is a liquid crystal display part, 415 is a circuit board, 421 is a rotating plate, and 421a is a cutout of the rotating plate. In addition, in FIG. 28 , 422 is a memory of the microprocessor 425 , 423 is a calendar, 424 is a clock, and 404 is a display interface connected to the liquid crystal display unit 414 .

Fig. 29 is an enlarged view of a portion for detecting completion of drug administration. In addition, when setting the injection volume to be administered, the dosage setting indicator 405 and the sleeve 418 are rotated. The amount of injection solution to be administered is determined by the amount of movement of the plunger 408 caused by the rotation of the dose setting indicator 405 . Therefore, it is widely used to detect the amount of injection liquid administered by detecting the amount of rotation of the injection amount setting indicator 405, the sleeve 418, and the amount of rotation. In addition, 416 is a sleeve spline part, and 417 is a setting indicator spline part.

Here, for example, as shown in FIG. 30, a rotating plate 421 that rotates simultaneously with the dosage setting indicator 405 is provided. As shown in FIG. There are two photosensors 419a and 419b on the position. When the dosage setting indicator 405 rotates, the rotating plate 421 also rotates, and the notch 421a provided on the rotating plate 421 allows the light of the optical sensors 419a and 419b to pass through or be blocked. Since the photosensors 419a and 419b output ON or OFF signals according to the amount of light, the rotation and the amount of rotation can be detected based on ON or OFF of the outputs of the photosensors 419a and 419b.

In addition, the use of two optical sensors 419a and 419b is because the amount of injection liquid administered increases or decreases depending on the rotation direction of the dose setting indicator 405 . The direction of rotation can be judged by the on/off phase difference of the outputs of the two photosensors 419a and 419b, and the amount of injection liquid administered can be detected by counting the on and off times of the outputs of the photosensors 419a and 419b. As described above, the rotation direction is judged by the output phase difference of the optical sensors 419a and 419b, and the mechanism for detecting the amount of injection liquid administered is shown in FIG. Shown, using a microprocessor 425 or the like.

Furthermore, the microprocessor 425 and the memory 422 can also be provided to record or display the time and date when the administration ends. In addition, some people have also designed a medical drug injector using a switch or the like instead of the optical sensors 419a and 419b.

However, in the conventional medical drug delivery device shown in FIG. 24 mentioned above, since the injection needle 204 is inserted into the skin when administering the drug, the injection button 203 is pushed in the same direction as the direction in which the injection needle 204 penetrates the skin. Therefore, the injection solution 202 is in a form in which the injection needle 204 penetrates the skin from the initial state, and the injection needle 204 penetrates deeper into the skin, which increases pain to the patient when administering the drug.

In addition, as shown in FIG. 25 , even if the medical drug delivery device is provided with a skin-contacting part 306 for administration, since the injection needle 304 is inserted into the skin while the skin-contacting part 306 is in contact with the skin, the The injection liquid 302 is injected while pushing the injection button 303 in the same direction as the direction in which the injection needle 304 penetrates the skin, so that the injection needle 304 penetrates deeper into the skin from the state where the injection needle 304 first penetrates the skin, This is the same as described above. This is because even if the skin contact portion 306 is provided, the actual skin has elasticity, and in fact, if the injection button 303 is pushed, the injection needle 304 will penetrate deeper into the skin only by the pushing force.

In order to prevent deeper penetration into the skin, during the injection process, although it is necessary to fix the arm on the side pushing the injection button 303 in the air, or to fix it carefully by some method, and inject it, this is in the process of administering the drug solution by yourself. case, it is extremely difficult.

Moreover, in the process of administering the drug, the injection needle penetrates deeper into the skin, which not only increases the pain of the patient, but also brings pain to the body and mind. The human body has a great impact, incurring life-threatening risks and other problems.

In addition, in the conventional medical drug delivery device shown in Fig. 24 and Fig. 25, the injection needle is not necessarily fixed, and the amount of the injection needle entering the skin varies due to the different types of the injection needle. Depending on the amount, the burden of failure and pain due to injection may be large, and the human body of the administerer (patient) may be greatly affected, leading to a risk of life-threatening.

In addition, the conventional medical dosing device shown in FIG. 24 has the following problems because the injection button or the dosing button can be pushed even when the injection needle is forgotten to be attached to the dosing device body.

One is, if the injection needle is not installed, and the injection button or the drug delivery button is pushed, the leaked medical solution 221a or the reverse flow of the medical solution 221b shown in Figure 33 will flow from the injection button or the direction opposite to the drug delivery button The front end leaks out. In addition, the liquid medicine will flow and leak in the opposite direction toward the injection button or the administration button. Furthermore, as shown in FIG. Various problems such as cracks 227 appearing due to excessive pressure, or fractured and fractured, resulting in leakage of the chemical solution to the outside.

In addition, even in the case of administering by mixing two types of drug solutions, or by dissolving and mixing drugs and drug solutions, such as growth hormone, it is necessary to mix after attaching the injection needle, so if you forget to attach the injection needle , not only can’t mix, as mentioned above, there will also be problems such as backflow and leakage of the liquid medicine, or cracks and ruptures in the glass tube of the liquid medicine cartridge. Many of the problems described above mostly occur where the patient administers the drug himself.

In addition, although the medical dosing device shown in Fig. 24 to Fig. 27 is less likely to cause an accident when a doctor or nurse administers the medicine, when the patient administers the medicine by himself, he often does not realize It is necessary to carry out the exhaust operation of the syringe, and there is a possibility of forgetting to exhaust the air. In addition, when the exhaust gas is forgotten, it may have a great influence on the human body depending on the individual, and there may be a risk of life-threatening.

26 and 27, although the electronic display device can display the amount of injection liquid for administration, the amount and date of the injection liquid during the exhaust operation that must be carried out before the administration Recording the memory 422 not only reduces the capacity of the memory 422 mischievously, but also displays the amount of the injection liquid during the exhaust operation in the same way as the original amount of the injection liquid, so the doctor confirms the diagnosis of the person (patient) There is a possibility of misjudgment when deciding on the results, past administration history, and future treatment methods. If the doctor makes such an erroneous judgment, it may have a great impact on the human body of the administerer (patient) and cause a life-threatening risk.

Contents of the invention

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a medical drug injector capable of injecting a drug solution safely and with high reliability.

That is, the present invention is proposed to solve the problems of the existing pen-type or mechanical devices as shown in FIG. 24 or FIG. The button also prevents the injection needle from penetrating the skin deeper than necessary, and enables drug administration in a stable state.

In addition, the present invention is proposed to solve the problems of the existing pen-type or mechanical devices as shown in FIG. 24 or FIG. Regardless of the type of injection needle used by the patient, the size of the injection needle entering the skin is constant, and the drug is administered in a stable state, so that the burden of failure or pain due to injection does not occur, and it is reliable.

In addition, the present invention is proposed to solve the problems of the conventional pen-type device as shown in FIG. Cracks, breakage, etc. appear in the glass tube of the liquid medicine, and, for the utensils used, it has reliability and safety.

In addition, the present invention is proposed to solve the problems of the conventional devices shown in FIGS. Medical dosing device that is easy and safe to use for the exhaust operation that must be performed beforehand.

In addition, the present invention is proposed to solve the problems of the conventional devices with electronic devices added as shown in FIG. 26 or FIG. The amount, date, and time of the drug administration solution recorded in the memory 422 is a medical drug injection device that retains reliable drug administration history.

In order to achieve the above object, the medical drug delivery device according to claim 1 of the present invention is provided with: an injection button for pushing the injection liquid by the user of the injection liquid to inject the injection liquid; The angle in which the longitudinal direction of the needle is parallel, and the pushing force transmission part transmitted to the plunger of the liquid medicine cartridge storing the injection liquid can be injected by pushing the injection button at an angle that is not parallel to the direction in which the injection needle is inserted. liquid.

Therefore, the force when the injection button is pushed is not transmitted, and the injection needle does not penetrate the skin deeper than when it first penetrated the skin, and does not increase the physical and mental pain of the person to be administered.

In addition, the medical injection device according to claim 2 of the present invention is the medical injection device described in claim 1, wherein the pushing force transmission part has a structure extending in the same direction as the pressing direction of the injection button. a rack; a first gear meshing with a profile tooth formed on one side in the longitudinal direction of the rack; a second gear meshing with the first gear; a direction perpendicular to the direction in which the rack extends. The side surface of the movable member has a tooth meshing with the second gear, and when the injection button is pushed, the movable member pushes the plunger of the liquid medicine cartridge.

Therefore, the force when the injection button is pushed is not transmitted, and the injection needle does not penetrate the skin deeper than when it first penetrated the skin, and does not increase the physical and mental pain of the person to be administered.

In addition, the medical dosing device according to claim 3 of the present invention is the medical dosing device described in claim 1, and includes an injection liquid volume setting unit capable of setting the volume of the injection liquid to be administered.

Therefore, when administering the medicine, the burden on the patient who administers the medicine can be reduced by only pressing the injection button without looking at the scale of the dose.

In addition, the medical drug delivery device according to claim 4 of the present invention is the medical drug delivery device described in claim 3, wherein the injection liquid volume setting part is formed integrally with the plunger and penetrates through the movement. A sleeve that engages with the movable part; it is installed on the opposite side of the sleeve to the above-mentioned plunger, and the drug injector can make the above-mentioned movable part move forward and backward inside the above-mentioned liquid medicine cartridge by changing the direction of rotation. Adjustment knob.

Therefore, by operating the dose adjustment knob, the dose can be set in advance, and when actually administering the medicine, only the injection button is pushed without looking at the scale of the dose, which can reduce the burden on the patient who administers the medicine.

In addition, the medical dosing device of claim 5 of the present invention is the medical dosing device described in claim 1, which is provided with a device that returns the injection button to its original position when the finger that pushes the injection button is released after administration. position of the injection button reset section.

Therefore, after administration, the administering patient does not need to return the injection button for readministration, and the burden on the administering patient can be reduced.

In addition, the medical injection device according to claim 6 of the present invention is the medical injection device described in claim 5, wherein the injection button reset part is formed by an end surface of the rack on the opposite side to the injection button. It is composed of a spring between the inner surface of the main body of the medical drug delivery device.

Therefore, only by adding a simple structure, after administration, the administering patient does not need to return the injection button for readministration, and the burden on the administering patient can be reduced.

In addition, the medical drug injection device according to claim 7 of the present invention is based on the medical drug injection device described in claim 1, on the same side of the medical drug injection device body as the installation surface of the injection needle, a Parts that come into contact with the skin during injection.

Therefore, the injection needle does not wobble, and the drug solution can be administered in a stable state.

In addition, the medical drug injection device according to claim 8 of the present invention is provided with: a skin contact part for stabilizing the drug administration state which is in contact with the skin of the user when injecting the drug solution; and a skin contact position capable of changing the position of the skin contact part. A changing part; a skin-contacting area changing part capable of changing the skin-contacting area of the skin-contacting part.

Therefore, even if the size of the injection needle is not constant, since the length of the injection needle is different depending on the type of the injection needle, the size at which the injection needle can enter the skin is constant, and the amount of the injection needle entering the skin does not vary. In addition, in the state of drug administration, by changing and increasing the fixed area of the skin-contacting part, the medical drug delivery device is supported on the skin of the drug user (patient) and contacts the skin in a state with a good feeling and a sense of stability. Therefore, It is possible to provide a highly reliable medical drug delivery device capable of reducing the burden of failure and pain due to injection, and to facilitate the treatment of doctors more reliably.

In addition, the medical drug delivery device according to claim 9 of the present invention is the medical drug delivery device described in claim 8, wherein the skin-contacting position changing part is formed by placing the skin-contacting part relative to the medical drug delivery device in a stepwise manner. The main body is configured by a fitting and fixing portion that is fitted and fixed at a desired position in the longitudinal direction of the injection needle.

Therefore, it is possible to securely fix the above-mentioned skin contact position changing portion at a desired position, to keep the size of the injection needle entering the skin constant, and to eliminate variations (misalignments) in the amount of injection needle entering the skin.

In addition, the medical drug delivery device according to claim 10 of the present invention is the medical drug delivery device according to claim 8, wherein the skin contact area changing part is manually operated to include the surface of the skin contact part. A part of the skin-contact width adjustment member slides to change the area of the skin-contact width adjustment unit.

Therefore, in the state of administration, the fixed area of the part that contacts the skin can be easily changed and increased by manual operation, and the medical administration device can be supported on the skin of the user (patient) with a feeling of good feeling and a sense of stability. Contact, therefore, can provide a highly reliable medical drug delivery device that can reduce the burden of failure or pain due to injection, and can more reliably promote the treatment of doctors.

In addition, the medical dosing device according to claim 11 of the present invention includes a dosing operation suppressing portion capable of suppressing the dosing operation of pushing the injection button or the dosing button when the injection needle is not attached to the dosing device.

Therefore, when the injection button or the injection button is pushed by forgetting to install the injection needle, the liquid medicine will not leak from the front end in the direction opposite to the injection button or the injection button, and the liquid medicine will not flow in the direction of the injection button or the injection button. Backflow, leakage, and the glass tube filled with the liquid medicine may crack, break and break due to the pressure generated by pushing the injection button or the dosing button, causing the liquid medicine to leak to the outside.

In addition, the medical dosing device of claim 12 of the present invention is the medical dosing device as described in claim 11, wherein the dosing operation suppressing unit performs the operation of the button when the injection needle is not attached to the dosing device. During operation, the action of the plunger that extrudes the liquid medicine can be suppressed.

Therefore, when the injection button or the injection button is pushed by forgetting to install the injection needle, the plunger will not move, the liquid medicine will not leak from the front end in the direction opposite to the injection button or the injection button, and the liquid medicine will not flow to the injection button or the injection button. The direction of the injection button is reversed, leaking out, and the glass tube filled with the drug solution is cracked, broken and broken due to the pressure generated by pushing the injection button or the drug delivery button, and the drug solution leaks to the outside.

In addition, the medical drug injection device according to claim 13 of the present invention is based on the medical drug injection device described in claim 11, since the drug injection operation suppressing part has an injection needle attachment for detecting whether the injection needle is attached to the drug injection device. Therefore, the detection unit detects that the injection needle is not attached to the drug injection device, and prevents the operation of the injection button or the drug injection button.

Therefore, when the injection button or the injection button is pushed by forgetting to install the injection needle, the liquid medicine will not leak from the front end in the direction opposite to the injection button or the injection button, and the liquid medicine will not flow in the direction of the injection button or the injection button. Backflow, leakage, and the glass tube filled with the liquid medicine may crack, break and break due to the pressure generated by pushing the injection button or the dosing button, causing the liquid medicine to leak to the outside.

In addition, the medical drug injection device according to claim 14 of the present invention is based on the medical drug injection device described in claim 13, and has a plunger drive unit that drives the plunger by operating the injection button or the drug injection button. When the injection needle is not attached to the drug delivery device, the injection needle installation detection part engages with the plunger driving part to suppress the operation of the injection button or the drug administration button.

In this way, it is possible to detect with a simple structure that the injection needle is not attached to the drug delivery device, and it is possible to prevent the operation of the injection button or the drug delivery button. The medicine liquid leaks from the front end in the opposite direction to the injection button or the injection button, and the medicine liquid flows backward and leaks in the direction of the injection button or the medicine injection button, and the glass tube filled with the medicine liquid is pushed and injected. The pressure generated by the button or the injection button causes cracks, ruptures and ruptures, causing the liquid medicine to leak to the outside.

In addition, the medical drug injection device according to claim 15 of the present invention is the medical drug injection device described in claim 14, when the injection needle is attached to the drug injection device, the resin part integral with the injection needle and the above-mentioned Detect component contact.

Therefore, the presence or absence of the injection needle can be easily detected, and a small medical injection device can be manufactured.

In addition, according to claim 16 of the present invention, in addition to the medical drug injection device described in claim 15, when the injection needle is detached from the drug injection device, the resin part integrated with the injection needle is separated from the above-mentioned Detect parts.

Therefore, it is a simple detection mechanism, and it is possible to manufacture a small medical drug injection device.

In addition, the medical drug injection device according to claim 17 of the present invention is based on the medical drug injection device described in claim 14, wherein the plunger drive unit is configured to perform a pushing operation by the user of the injection liquid, An injection button for injecting an injection; a rack extending in the same direction as the pushing direction of the injection button and having a notch-shaped engaging portion on a part thereof; A first gear meshing with teeth; a second gear meshing with the first gear and a profile tooth formed along the longitudinal direction of the above-mentioned plunger; The front end portion of the L-shape clamped by the liquid medicine cartridge and the injection needle is formed with an ejector rod of a notch-shaped engagement portion at a position corresponding to the engagement portion of the rack; pull the ejector rod toward the front end of the injection needle When the above-mentioned injection needle is installed without the above-mentioned L-shaped front end in the middle, by the pulling force of the above-mentioned spring member, the engaging parts of the above-mentioned ejector rod and the above-mentioned plunger are engaged with each other, preventing the injection button from being pressed against each other. Or dosing button to operate.

Therefore, it is possible to detect that the injection needle is not attached to the drug delivery device with a simple structure, and prevent the operation of the injection button or the drug delivery button. Problem: The liquid medicine leaks from the front end in the direction opposite to the injection button or the injection button, and the liquid medicine flows backward and leaks in the direction of the injection button or the medicine injection button, and the glass tube filled with the liquid medicine is pushed The pressure from the injection button or drug delivery button causes cracks, ruptures and ruptures, causing the liquid medicine to leak to the outside.

In addition, the medical drug delivery device according to claim 18 of the present invention is structured such that when the drug solution cartridge is to be fixed to the drug delivery device body, the drug solution cartridge cannot be properly stored in the drug delivery device body unless an injection needle is attached. Inside.

Therefore, when forgetting to install the injection needle and pushing the injection button or the injection button, the following phenomenon will not occur: the liquid medicine leaks from the front end in the direction opposite to the injection button or the injection button, and the liquid medicine will not flow into the injection button or the injection button. The direction of the button is reversed, leaking out, and the glass tube filled with the drug solution is cracked, broken and broken due to the pressure generated by pushing the injection button or the drug delivery button, and the drug solution leaks to the outside.

In addition, the medical drug delivery device according to claim 19 of the present invention is the medical drug delivery device described in claim 18, in which a plurality of liquid medicines are mixed, or medicines and medicines are dissolved and mixed in the drug delivery device body. A drug delivery device for a liquid has a structure that cannot be mixed unless an injection needle is attached.

Therefore, when the injection needle is not attached to the drug delivery device body, the drug solution cartridge cannot be accommodated in the drug delivery device body, and the drug solution cannot be mixed, so that leakage of the drug solution, backflow, or cracks in the glass tube containing the drug solution can be prevented. rupture etc.

In addition, the medical drug delivery device according to claim 20 of the present invention is the medical drug delivery device described in claim 19, and is used when the drug solution cartridge is to be fixed on the drug delivery device body. If the needle is used, the rear rubber part of the drug solution cartridge is in contact with a part of the drug delivery device and cannot slide inside the drug solution cartridge.

Therefore, since the drug solution cartridge cannot be installed in the drug delivery device body when the injection needle is not mounted on the drug delivery device body, the drug solution cannot be mixed, and the leakage of the drug solution, backflow, or cracks in the glass tube containing the drug solution can be prevented. rupture etc.

In addition, the medical drug injection device according to claim 21 of the present invention is the medical drug injection device described in claim 19, wherein the drug solution cartridge has a front half chamber on the side where the injection needle is mounted and a rear half chamber on the opposite side. The chambers are filled with different medicines or liquid medicines. The front half chamber has a large-diameter portion with a part of the inner diameter larger than the other inner diameters. The rear rubber part is arranged on the end surface of the medicine liquid cartridge opposite to the side where the injection needle is attached. On the other hand, by pressing the rear rubber part into the liquid medicine cartridge, the separation rubber separating the front half chamber and the rear half chamber moves to the large diameter part to mix the medicine or liquid medicine.

Therefore, if the injection needle is not attached, the rear rubber part of the drug solution cartridge cannot slide inside the drug solution cartridge while contacting a part of the drug delivery device. When the injection needle is not attached to the drug delivery device body, The drug solution cartridge cannot be accommodated in the drug delivery device body, so the drug solution cannot be mixed, and the leakage and reverse flow of the drug solution, or cracks and breakage of the glass tube containing the drug solution can be prevented.

In addition, the medical drug delivery device according to claim 22 of the present invention is based on the medical drug delivery device described in claim 21, and is fixed on the drug delivery device body, and since the drug solution cartridge is mounted on the drug delivery device, Since it slides inside the body, there is a melting part that presses the above-mentioned rear rubber part.

Therefore, it is possible to mix the medicinal solution in the medicinal solution cartridge with a simple configuration added to the main body of the medicinal administration device.

In addition, the medical drug injection device according to claim 23 of the present invention is the medical drug injection device described in claim 18, when the drug solution cartridge is fixed to the drug injection device body, the fixing on the side of the drug injection device body An openable door is provided at the position of the liquid medicine cartridge.

Therefore, the fixing operation of the drug solution cartridge can be easily performed.

In addition, the medical drug injection device according to claim 24 of the present invention is based on the medical drug injection device described in claim 18, and a device for detecting whether the injection needle is attached to the drug injection device is provided between the injection needle and the drug injection device body. Injection needle installation detection part.

Therefore, the presence or absence of an injection needle can be easily detected, and a small medical injection device can be manufactured.

In addition, the medical drug injection device according to claim 25 of the present invention is based on the medical drug injection device described in claim 20, and employs an injection needle attachment detection device that detects that the injection needle is attached to the drug solution cartridge. The structure of the slider for accommodating the liquid medicine cartridge so that it slides in the main body of the medicine injection device.

Therefore, only by adding a simple structure, when the injection needle is attached, the drug solution cartridge can be smoothly and reliably stored in the drug injector body, and the stored state can be reliably maintained.

In addition, the medical dosing device of claim 26 of the present invention is the medical dosing device as described in claim 25, wherein the injection needle attachment detection part is clamped between the injection needle and the medicine when the injection needle is attached. Except for the L-shaped front end portion between the liquid cylinders, it is arranged parallel to the slider on the lower side of the slider, and has a spring force by pushing and formed on the slider and the injection needle installation detection part. In the ejection head (Igeektonob) where the opening part is fitted, the opening part is formed on the slider and the injection needle attachment detection part so that the positions of the opening parts overlap each other when the injection needle is not attached. In the injection needle, when the injection needle attachment detection part is misaligned, the openings are at different positions from each other.

Therefore, only by adding a simple structure, when the injection needle is attached, the drug solution cartridge can be smoothly and reliably stored in the drug injector body, and the stored state can be reliably maintained.

In addition, the medical drug delivery device according to claim 27 of the present invention is provided with an exhaust notification unit that reminds the drug user to perform an exhaust operation to remove air remaining in the drug solution chamber of the drug delivery device before injection.

Therefore, for the drug user (patient), it can be made aware of the exhaust, and it can be prevented that the drug user forgets to perform the exhaust operation before the drug administration. Therefore, the human body of the drug user (patient) is greatly affected, causing In the event of an accident such as a life-threatening risk, it is possible to provide a medical drug delivery device that is easy and safe to use.

In addition, according to claim 28 of the present invention, in addition to the medical drug injection device recited in claim 27, the exhaust gas notifying portion displays characters, symbols, or graphics to remind the drug user to perform an exhaust operation, and at the same time An audible sound reminds you to perform the exhaust operation.

Therefore, since the words, signs or graphics reminding to perform the exhaust operation are displayed, the drug user (patient) can be aware of the exhaust operation, and it can be prevented that the drug user forgets to perform the exhaust operation before administering the drug. , has a great impact on the human body of the drug user (patient), causing accidents such as life-threatening risks (states), and it is possible to provide a medical drug injection device that is easy and safe to use.

In addition, the medical drug injection device according to claim 29 of the present invention is the medical drug injection device described in claim 27, wherein the exhaust gas notifying part has a first switch for detecting Cap, the body is installed with a cap to cover the body part of the medical drug delivery device with the injection needle installed; when the switch detects that the body cap is removed, it produces text, marks or graphics to remind the drug user to perform the exhaust operation Exhaust display signal generation unit for display signal; display unit for displaying the display signal of text, symbol or graphic reminding to perform the above-mentioned exhaust operation, when the cap for the body is removed, wherein the cap for the body is installed to cover and install the injection needle The body part of the medical dosing device, so that it displays text, marks or graphics that remind the dosing user to perform the exhaust operation.

Therefore, when the cap is removed from the main body, the words, signs and graphics reminding to perform the exhaust operation are displayed, so the drug user (patient) can be made aware of the exhaust gas in advance, and it can be prevented that: Therefore, the human body of the drug user (patient) is greatly affected, and accidents such as life-threatening risks are caused. Therefore, it is possible to provide a medical drug injection device that is easy and safe to use.

In addition, the medical drug injection device according to claim 30 of the present invention is the medical drug injection device described in claim 27, wherein the exhaust gas notification means includes: When the switch detects that the liquid medicine cartridge is fixed (installed) in the body of the medical dosing device, a display signal of text, symbols or graphics reminding the doser to perform the exhaust operation is generated. The exhaust display signal generating part; the display part that displays the display signal of the words, symbols or graphics reminding to perform the above-mentioned exhaust operation. Words, signs or graphics of exhaust operations.

Therefore, since the characters, signs or graphics reminding to perform the exhaust operation are displayed when the liquid medicine cartridge is fixed, the drug user (patient) can be made aware of the exhaust gas in advance, and the drug user can be prevented from Forgetting to perform exhaust operation before administering the medicine will greatly affect the human body of the administerer (patient) and cause accidents such as life-threatening risks, and it is possible to provide a medical administering device that is easy and safe to use.

In addition, according to claim 31 of the present invention, the medical drug injection device according to claim 27 is the medical drug injection device described in claim 27, wherein the exhaust gas notifying part has a first switch for detecting a device for detaching the main body. Cap, the body cap is installed to cover the body part of the medical drug delivery device on which the injection needle is installed; when the switch detects that the body cap is removed, the exhaust sound of the sound signal reminding the injector to perform the exhaust operation is generated. Signal generating part; a speaker that emits a sound signal for reminding the above-mentioned exhaust operation, and when the above-mentioned body cap is removed, it emits a sound reminding the doser to perform the exhaust operation.

Therefore, when the cap for the main body is detached, the sound reminding to perform the exhaust operation is made, so the drug user (patient) can be made aware of the exhaust gas in advance, and the drug user can be prevented from forgetting before the drug administration. Since the exhaust operation is performed, the human body of the drug user (patient) is greatly affected, and accidents such as life-threatening risks are caused, and a medical drug injection device that is easy and safe to use can be provided.

In addition, the medical drug delivery device according to claim 32 of the present invention is based on the medical drug delivery device described in claim 27, wherein the exhaust gas notification mechanism has a function of detecting that the drug solution cartridge is fixed (installed) in the medical drug delivery device. The second switch of the situation in the drug injection device body; when the switch detects that the liquid medicine cartridge is fixed in the medical drug injection device body, the exhaust sound signal that generates the sound signal to remind the drug user to perform the exhaust operation occurs Part; a speaker that emits a sound signal to remind the above-mentioned exhaust operation, and when the liquid medicine cartridge is fixed in the body of the medical drug delivery device, it emits a sound reminding the injector to perform the exhaust operation.

Therefore, since the sound to remind the exhaust operation is made when the drug solution cartridge is fixed, the drug user (patient) can be made aware of the exhaust in advance, and it can be prevented that the drug user is exhausted before the drug is administered. Forgetting to perform the exhaust operation will greatly affect the human body of the drug user (patient) and cause accidents such as life-threatening risks, and it is possible to provide a medical drug injection device that is easy and safe to use.

In addition, the medical dosing device according to claim 33 of the present invention includes: an injection needle contact detection unit for detecting the contact between the injection needle and the skin; an injection end detection unit for detecting the completion of the injection; A detection unit; an injection volume recording unit for recording the volume of the injected injection; controlling the above-mentioned injection volume detection unit and the above-mentioned injection volume recording unit; A control unit that records the amount of injection liquid administered when the unit detects that the injection needle is in contact with the skin.

Therefore, because only when the end of injection is detected and the injection needle is in contact with the skin at the same time, the above-mentioned detected injection volume is recorded, so the history when the exhaust gas can not be kept, and only the history when the drug is actually administered can be reliably reserved, which can solve the problem. Even the amount of injection solution during the exhaust operation that must be performed before administration is recorded in the memory, and the memory capacity of the storage part is reduced mischievously, or the doctor confirms the diagnosis result of the administerer (patient) and the past administration history and decision In the case of the future treatment method, it is mistakenly thought that the drug was administered without actually administering the drug. Therefore, the human body of the administering drug (patient) is greatly affected, and various problems such as life-threatening risks are incurred, and more can be obtained. A medical drug delivery device that reliably facilitates a doctor's treatment method.

In addition, the medical drug injection device according to claim 34 of the present invention is based on the medical drug injection device described in claim 33, comprising: a calendar part that generates current date information; a clock part that generates current time information, The control unit detects the end of the injection and records the date and time of the end of the injection.

Therefore, since it is only when the injection needle is in contact with the skin when the end of the injection is detected, the above-mentioned detected injection volume, date, and time are recorded. The history at the time of drug administration can be resolved. Even the injection volume, date, and time during the exhaust operation that must be performed before drug administration are also recorded in the memory, which reduces the memory capacity of the storage part in a prank. (Patient) Diagnosis results, past administration history, and future treatment methods are determined, but in fact no medicine is administered but it is misidentified (judged) as medicine, so it brings great harm to the human body of the administerer (patient). A medical drug delivery device that can more reliably promote a doctor's treatment method can be obtained due to various problems such as adverse effects and life-threatening risks.

In addition, the medical drug delivery device according to claim 35 of the present invention is based on the medical drug delivery device described in claim 33, and has a display indicating the amount of injection liquid when the amount of injection liquid to be administered is set and when the injection is completed. The display part of the recorded injection volume.

Therefore, since the above-mentioned detected amount of injection liquid is displayed only when the injection needle is in contact with the skin at the same time as the end of the injection is detected, the history of the time of exhaustion can not be kept, and only the history of actual drug administration can be retained reliably. , can solve the problem of displaying the amount of injection liquid even during the exhaust operation that must be performed before administration, or when the doctor confirms the diagnosis result of the injector (patient) and the past administration history, and decides on the treatment method in the future, the actual However, it is mistakenly believed that the drug was administered, so it has a great impact on the human body of the drug user (patient) and causes various (various) problems such as life-threatening risks. A medical drug delivery device for a treatment method.

In addition, the medical drug injection device according to claim 36 of the present invention is the medical drug injection device described in claim 35, wherein the display unit also displays the above-mentioned date, time.

Therefore, since the injection liquid amount, date, and time detected above are displayed only when the injection needle is in contact with the skin when the injection is completed, the history of the time of exhaustion can not be kept, and only The history of the actual administration can solve the injection volume, date, and time of the exhaust operation that must be performed before the administration, and can also be displayed when the doctor confirms the diagnosis result of the administerer (patient) and the past administration history, When deciding on the future treatment method, it is mistakenly thought that the drug was administered without actually administering the drug. Therefore, the human body of the administering drug (patient) is greatly affected, and various problems such as life-threatening risks are incurred. A medical drug delivery device that can more reliably promote a doctor's treatment method.

In addition, the medical drug injection device according to claim 37 of the present invention is the medical drug injection device described in claim 33 , wherein the injection needle contact detection unit has a function of sliding the injection needle while the injection needle is inserted into the periphery of the injection needle. A ring-shaped or semi-ring-shaped contact detection member; a third switch that operates due to the sliding of the contact detection member.

Therefore, the contact of the injection needle with the skin can be detected with a simple structure.

In addition, according to claim 38 of the present invention, the medical drug injection device according to claim 33 is the medical drug injection device described in claim 33, wherein the injection needle contact detection part has , The third switch that operates at the same time as the injection needle penetrates the skin when administering the drug.

Therefore, the contact of the injection needle with the skin can be detected with a simple structure.

Description of drawings

Fig. 1 is a perspective view of a medical drug delivery device according to Example 1 of the present invention.

Fig. 2 is a perspective view showing a part of the medical drug injector cut away.

Fig. 3 is a perspective view showing a state in which the medical drug injector is actually held by hand.

Fig. 4 is a perspective view of a medical drug delivery device according to Example 2 of the present invention.

Fig. 5 is a partial cross-sectional view of the medical drug delivery device.

Fig. 6 is a detailed perspective view of the medical drug injector.

Fig. 7 is a schematic diagram showing details of the dimensional relationship between the injection needle and the skin-contacting part of the medical drug delivery device of the present invention.

Fig. 8 is a partially cutaway perspective view illustrating an internal structure of a medical drug delivery device according to Example 3 of the present invention.

Fig. 9 is a perspective view showing the positional relationship between a drug injection button (or an injection button) and a plunger for explaining the principle of operation of the medical drug injection device.

Fig. 10 is a perspective view showing the positional relationship between a drug injection button (or an injection button) and a plunger for explaining the principle of operation of the medical drug delivery device.

Fig. 11 is a partial cross-sectional view showing the attached state of the drug solution cartridge of the medical drug injector.

Fig. 12 is a diagram showing the positional relationship between the detection mechanism and the injection button when the injection needle is not attached to the medical drug injection device.

Fig. 13 is a diagram showing the positional relationship between the detection mechanism and the injection button when the injection needle is attached to the medical drug injection device.

Fig. 14 is a diagram showing the positional relationship between the detection mechanism and the fixing release mechanism when the injection needle is not attached to the medical drug injection device.

Fig. 15 is a diagram showing the positional relationship between the detection mechanism and the fixing release mechanism when the injection needle is attached to the medical drug injection device.

Fig. 16 is a perspective view of the medical drug injector before the injection needle is attached according to the fourth embodiment of the present invention.

Fig. 17 is a partial cross-sectional view of the medical drug delivery device.

Fig. 18 is a block diagram of the medical drug delivery device.

Fig. 19 is a block diagram for explaining the medical drug delivery device.

Fig. 20 is a perspective view of a medical drug delivery device according to Example 5 of the present invention.

Fig. 21 is a partial sectional view of the medical drug delivery device.

Fig. 22 is a perspective view of a medical drug injector according to a modification of Example 5 of the present invention.

Fig. 23 is a partial sectional view of the medical drug delivery device.

Fig. 24 is a perspective view showing a conventional medical drug injector.

Fig. 25 is a perspective view showing another conventional medical drug delivery device.

Fig. 26 is a front view of a conventional medical drug delivery device.

Fig. 27 is a plan view showing a partial section of a conventional medical drug injector.

Fig. 28 is a block diagram illustrating a conventional medical drug delivery device.

Fig. 29 is a cross-sectional view showing a mechanism for detecting completion of drug administration in a conventional medical drug injector.

Fig. 30 is a cross-sectional view showing a mechanism for detecting the amount of injection liquid in a conventional medical drug injection device.

Fig. 31 is a side view showing a mechanism for detecting the amount of injection liquid in a conventional medical drug injection device.

Fig. 32 is a block diagram illustrating a conventional medical drug delivery device.

Fig. 33 is a perspective view showing an operating state of a conventional medical drug injector.

Fig. 34 is a perspective view showing another operating state of the conventional medical drug injector.

Detailed ways

Example 1

This embodiment 1 corresponds to the inventions of claims 1 to 7, and the direction of pushing the injection button is different from the direction in which the injection needle penetrates the skin due to the constituted device. The injection needle penetrates deeper.

Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 3 . 1 is a perspective view showing the appearance of the medical drug injection device according to Embodiment 1 of the present invention; FIG. A perspective view of a state in which the medical drug delivery device is actually held by hand in Example 1 of the invention.

In Fig. 1, 1 is the main body of the medical drug delivery device, 2 is the injection liquid, 3 is the injection button, 4 is the injection needle, 6 is the skin contact part, 7 is the liquid medicine cartridge, 8 is the liquid crystal display part, and 9 is the dosage Adjustment knob. In addition, the injection button 3 is configured such that the injection button is pushed in a direction substantially perpendicular to the direction in which the injection needle 4 extends. If the direction in which the injection button 3 is pushed is not parallel to the direction in which the injection needle 4 extends, it is not limited to the vertical direction, and other angles are also acceptable as long as the direction can relieve the pain of the patient's body.

The order of administration of the injection is, at first, the liquid medicine cartridge 7 is set in the medical administration device body 1, the injection needle 4 is installed, and in order to set the amount of the injection 2 to be administered, as shown by the arrow in the figure, move to Rotate the dosage adjustment knob 9 right or left. Then, with the injection needle facing directly upward, push the injection button 3 until the injection liquid 2 comes out from the front end of the injection needle 4, and exhaust gas. After the exhaust is completed, as shown in Figure 3, hold the medical drug delivery device with the hand 19, while making the contact skin part 6 contact the skin of the affected part of the drug injection, the injection needle 4 will be pierced into the skin, and the injection needle 4 will be inserted into the skin with the index finger 18. Dosing while pressing the injection button 3 in the direction of the arrow.

Next, the setting method of the injection liquid volume and the structure in which the injection liquid 2 is ejected from the injection needle 4 when the above-described injection button 3 is pushed will be described with reference to FIG. 2 .

First, the setting method of the injection liquid volume will be described. The dosage adjustment knob 9 and the sleeve 10, though the rotation direction is fixed, the sliding direction is not fixed. In addition, the sleeve 10 and the plunger 15 passing through the inside of the movable member 14 are constituted by an integral part. Process the inner thread 16 that can be threaded (screwed) with the sleeve 10 in the movable part 14 in the inner side of the movable part 14. The external thread 16 of screw connection (spin).

In addition, the plunger 15 is composed of a member different from the plunger 20 in the liquid medicine cartridge 7, and can be separated from the plunger 20. The front end of the plunger 20 is provided with a plunger 21 made of rubber so that the injection solution 2 can be extruded in the liquid medicine tube 7 and fixed with the plunger 20 . In addition, the structure is such that the sliding amount of the movable member 14 is always constant because it is regulated by the spring 17 .

Now, if the dosage adjustment knob 9 is turned in the direction of increasing the dosage, the plunger 15 will extend from the movable member 14 toward the injection needle. Then, the distance between the plunger 15 and the plunger 20 which is not integrated therewith is shortened. In addition, the plunger 20 does not move unless it is pushed by the plunger 15 . Moreover, since the sliding amount of the movable member 14 is always constant when the injection button 3 is pushed, the distance from which the plunger 15 pushes the plunger 20 is the amount of the injection liquid during administration. That is to say, it has nothing to do with the amount of injection liquid for administration, the stroke of the injection button during administration is always the same, and the amount of administration is determined by the sliding amount (てしろ) of the plunger 15 coming out from the movable part 14.

Hereinafter, a structure in which the injection liquid 2 is discharged from the injection needle 4 when the injection button 3 is pushed will be described. In FIG. 2 , when the injection button 3 is pushed in the direction of the arrow, the rack 11 constituted by an integral member also slides in the direction of the arrow. A spring (injection button reset portion) 17 is provided on the end surface of the rack 11 opposite to the injection button 3, so that it is compressed when the injection button 3 is pushed, and when the injection button 3 is stopped, it will be released by its elasticity. reset. Therefore, when the push of the injection button 3 is stopped, the injection button 3 returns to the original position by the restoring force of the spring 17 .

A profile tooth 11 a is provided on the side surface of the rack 11 , a gear (first gear) 12 is provided to mesh with the profile tooth 11 a , and a gear 13 (second gear) is provided to mesh with the gear 12 . In addition, profile teeth are provided on the side of the movable member 14 to mesh with the gear 13 . The rack 11 , gear 12 , and gear 13 constitute a pushing force transmission portion that transmits the pushing force of the injection button 3 to the plunger 15 at an angle different from the direction in which the injection needle 4 extends.

When the injection button 3 is pushed, the rack 11 slides, the gear 12 rotates counterclockwise, and the gear 13 rotates clockwise. Then, the movable member 14 is integrated with the plunger 15 and slides in the direction of pushing the plunger 20 and the plunger 21 . Then, the plunger 21 slides in the direction of compressing the injection solution 2 in the drug solution cartridge 7 , and the compressed injection solution 2 is extruded from the tip of the injection needle 4 .

The medical drug delivery device shown in Embodiment 1, as described above, has a structure that does not transmit the force when pushing the injection button 3 with the index finger 18 in the direction of the arrow in FIG. Pierce deeper into the skin initially.

Therefore, according to the first embodiment, when the drug solution is administered, the force of pushing the injection button can be prevented from being transmitted, so that the injection needle does not penetrate the skin deeper than when the injection needle was first inserted into the skin, and the drug can be administered in a stable state. liquid.

Example 2

This embodiment 2 corresponds to the inventions of claims 8 to 10. Since the skin-contacting portion in contact with the skin can be slid and fixed in the longitudinal direction of the injection needle when the drug solution is administered, it can Regardless of the type and size of the injection needle, the amount of penetration of the needle point into the skin can be adjusted to a constant value, which can reduce the pain when injecting the drug solution.

Hereinafter, Embodiment 2 of the present invention will be described with reference to FIGS. 4 to 7 . 4 is a perspective view showing the appearance of a medical drug delivery device according to a second embodiment of the present invention, FIG. 5 is a partial sectional view of a medical drug delivery device according to a second embodiment of the present invention, and FIG. As a perspective view of the detailed structure of the drug delivery device, FIG. 7 is a schematic diagram showing the relationship between the injection needle and the skin-contacting part of the medical drug delivery device of the present invention.

In Fig. 4, 31 is the main body of the medical drug delivery device, 32 is the injection liquid, 33 is the injection button, 34 is the injection needle, 36 is the contact skin part that contacts the skin, 37 is the adjustment button for the contact skin part, and 40 is the contact skin part. Width adjuster (skin contact area changing part, skin contact width adjustment part), 41 is the contact skin width adjustment button. The skin-contact width adjustment button 37 is integrated with the skin-contact portion 36 and can slide in any direction indicated by the arrow 43 .

In Fig. 5, the skin contact part 36 is integrated with the skin contact part adjustment button (skin contact position change part) 37, and a bump (convex shape) 38 is set on the skin contact part adjustment button 37, and the medical drug injection device body Concave shape (groove) 39 is set on the side of 31, as fitting fixing part, so that contact skin part 36, contact skin part adjustment button 37 can stop at desired position, and fix.

Therefore, as shown in Figure 4, the skin contact part 36 and the skin contact part adjustment button 37 can be changed to and fixed on the position of the desired concave shape in the arrow 43 direction relative to the injection needle 34, as shown in Figure 7, the injection needle 34 and the skin-contacting portion 36 are in a desired stepped dimensional relationship 42 .

In the case of using the same kind of injection needle 34 every time when administering medicine, after changing the dimensional relationship 42 of the contact skin part 36 with respect to the injection needle 34 to its optimum position, if it is fixed, then every time The drug can be administered in the same state, and since the length of the injection needle 34 entering the skin of the person to be administered (patient) is constant, the drug can be administered with high reliability.

In Fig. 6, the contact skin width adjustment member 40 is integrated with the contact skin width adjustment button 41, and by making it slide toward the arrow direction 44, that is, to the top of the figure, the contact skin portion 36 is wider. When the administerer brings the skin contact portion 36 into contact with the skin, the administration can be performed in a stable state with a better holding feeling.

Therefore, according to the present embodiment 2, since the length of the injection needle entering the skin is constant regardless of the type and size of the injection needle, the position of the part in contact with the skin can be changed and the area in contact with the skin can be increased, so it is possible to provide Even if the length of the injection needle varies depending on the type of the injection needle, the amount of the injection needle entering the skin does not vary, and the drug administration state can be stabilized, and a medical drug delivery device with high reliability.

Furthermore, by replacing the protrusions and grooves, it is possible to fix the skin-contacting portion 36 at an arbitrary position, and it is also possible to adjust the position of the skin-contacting portion 36 steplessly.

In addition, since the internal structure is the same as that of the first embodiment, the pushing direction of the injection button is different from the direction in which the injection needle 204 penetrates the skin, so that the pain during injection can also be reduced.

Example 3

This embodiment 3 corresponds to the invention of claim 11 to claim 26, so that when the injection needle is not installed on the drug delivery device body, the injection button or the drug delivery button cannot be pushed. When the injection needle is not installed on the drug delivery device, the drug cannot be mixed and cannot be stored in the drug delivery device body, so it can prevent the leakage and backflow of the drug solution, and can also prevent the glass tube in which the drug solution is placed. Cracks, cracks, etc.

Hereinafter, Embodiment 3 of the present invention will be described with reference to FIGS. 8 to 15 . Fig. 8 is a perspective view showing an internal structure of a part of the medical drug injection device according to Example 3 of the present invention. 9 is a perspective view for easily understanding the operation principle when the medical drug injection device of the third embodiment is attached, and FIG. 10 is a perspective view for easily understanding the operation principle when the injection needle is not attached. Fig. 11 is a partially cutaway cross-sectional view for explaining the mounting operation of the drug solution cartridge of the medical drug injection device according to the third embodiment. Fig. 12 is a diagram showing the positional relationship between the detection mechanism and the injection button when the injection needle is not attached to the medical drug injection device of the third embodiment. FIG. 13 is a diagram showing the positional relationship between the detection mechanism and the injection button when the injection needle is attached to the medical drug injection device according to the third embodiment. Fig. 14 is a diagram showing the positional relationship between the detection mechanism and the fixing and releasing mechanism of the medical drug injection device according to the third embodiment when the injection needle is not attached. Fig. 15 is a diagram showing the positional relationship of the detecting mechanism fixing and releasing mechanism when the injection needle is attached to the medical drug injection device according to the third embodiment of the present invention.

In FIG. 8, the structure of injection is briefly demonstrated. The drug solution cartridge 52 is fixed in the main body of the drug injector 66 , and the disposable injection needle 51 is attached to the drug solution cartridge 52 . In the case of administering medicine to the human body, adjust the dose adjustment knob 56 to the desired dose. Although the plunger 55 is fixed to the dosage setting knob 56 incapable of relative rotation, it can slide in the relative sliding direction, so if the dosage setting knob 56 is rotated, the plunger 55 can move in a direction parallel to the injection needle. telescopic. When the dosage is set to increase, the plunger 55 moves toward the front end thereof in the same direction as the injection needle.

Next, when the injection button 54 is pushed, the injection button-integrated drive rod 57 moves in the same direction as the direction in which the injection button is pushed. A portion of the side surface of the injection button-integrated drive lever (injection button, rack) 57 is a gear (rack) that meshes with a gear (first gear) 60 . In addition, the gear (second gear) 59 meshes with the gear 60 and also meshes with the gear (rack) at the tip of the plunger 55 . A medical solution extruding plunger 53 is provided at the tip of the plunger 55 and contacts the medical solution in the drug solution cartridge 52 . These injection button-integrated drive rod 57 , gear 60 , and gear 59 constitute a drive portion of plunger 55 .

Now, when the injection button 54 is pushed in the direction of the arrow in FIG. 8 , the injection button-integrated drive lever 57 rotates the gear 60 clockwise. Due to the rotation of the gear 60 , the gear 59 rotates counterclockwise to move the plunger 55 in the longitudinal direction of the injection needle 51 , that is, to the left in FIG. 8 . Then, the drug solution extrusion plunger 53 provided at the tip of the plunger 55 can squeeze out the drug solution in the drug solution cartridge 52 from the injection needle 51 to administer the drug.

In addition, in FIG. 9 , the front end (L-shaped front end) 58 a of the plunger 58 is in a state of being sandwiched between the resin portion 82 of the injection needle 51 and the drug solution cartridge 52 . At this time, when the injection button 54 is pushed in the direction of the arrow, the injection button-integrated driving rod 57 is in a state of being able to move freely in the engaging portion 61 of the ejector rod 58 . These ejector rods 58 and the injection button-integrated drive rod 57 constitute a drug injection action suppressing portion that suppresses the drug injection action caused by pushing the injection button. In addition, the front end portion (detection member) 58a of the ejector rod 58 is integrated with the body of the ejector rod 58, and when the injection needle 51 integrally formed with the resin part 82 is mounted, the spring 63 always applies a force in the direction of the injection needle 51. . The spring (spring member) 63 and the plunger 58 constitute an injection needle attachment detection section.

Next, as shown in FIG. 10 , when the injection needle 51 is detached from the liquid medicine cartridge 52 , the push rod 58 is moved toward the injection needle 51 by the force of the spring 63 , that is, to the left in FIG. 9 . Then, the engaging portion 61 of the ejector rod 58 disengages from the engaging portion 62 of the injection button-integrated drive rod 57, and when the injection button 54 is pushed in the direction of the arrow, the engaging portion 62 immediately contacts the side of the ejector rod 58 so that it cannot Move freely. That is, if the injection needle 51 is detached, the injection button 54 cannot be pushed in at all. In this manner, in the third embodiment, it is possible to detect whether an injection needle is attached to the front end portion 58a of the plunger 58 or not.

Hereinafter, a method of fixing the drug solution cartridge 52 to the drug injector body 66 and storing it in the drug injector body 66 will be described with reference to FIG.

In FIG. 11 , the liquid medicine cartridge 52 is inserted in the direction of the arrow in the drawing in a state where the liquid medicine cartridge gland (openable door) 67 is lifted upward to the dotted line portion in the figure. After insertion, close the liquid medicine cartridge gland 67 downward. Next, the injection needle 51 is screwed onto the threaded portion at the front end of the drug solution cartridge 52 in a state where the injection needle cap 65 is covered.

Next, grasp the protrusion 67 a and slide it in the direction of the dosage setting knob 56 . Then, first, the rear rubber part 70 inside the drug solution cartridge 52 comes into contact with the dissolving member 72 inside the drug injector main body 66 . If it is further slid, the dissolving member 72 presses the rear rubber part 70 , so that the drug solution 71 filled in the rear half chamber moves the separation rubber 69 toward the front half chamber containing the drug 68 .

Then, when the separating rubber 69 moves to the injection groove 77 , the medical solution 71 flows into the medicine 68 side through the injection groove (large diameter portion) 77 . If the protruding portion 67a is grasped again and made to slide toward the dosage setting knob 56, all the liquid medicine 71 flows from the injection groove 77 into the cavity of the medicine 68, and finally the medicine 68 and the medicine liquid 71 are mixed. Moreover, if the protruding portion 67a is grasped and further slid in the direction of the dosage setting knob 56, when the rear rubber portion 70 comes into contact with the separating rubber 69, it cannot slide anymore and is fixed. This fixing structure will be described in the description of FIG. 15 . And, in this state, the drug solution cartridge 52 is accommodated in the drug injector main body 66 .

12 and 13 are diagrams showing in detail the relationship between the detection mechanism and the injection button-integrated drive rod 57 when the injection needle is attached and when the injection needle is not attached. FIG. 12 shows the state when the injection needle is not attached, and FIG. 13 shows the state when the injection needle is attached. In addition, the "injection needle" in the description of FIGS. 12 to 15 refers to the injection needle 51 in the state covered with the cap 65 .

In FIG. 12( a ), the liquid medicine cartridge 52 remains at the front end of the slide bar 75 . Moreover, the ejector rod 58 is located above the slide bar 75 and is structured such that it can freely move above the slide bar 75 parallel to the installation direction of the injection needle.

In addition, FIG. 12( b ) is a view of FIG. 12( a ) viewed from the lower side, and the slider 75 is provided with a notch 78 and a notch 83 in which the pushing head 76 enters. In addition, the notch 73 is also provided in the same position as the notch 83 on the push rod 58 .

In addition, in the central portion of the slider 75 and the ejector rod 58, a slit 81 of the same width is provided on the parts where they overlap respectively. Furthermore, a slit 81 parallel to the slider 75 is provided in the slit 81, which can be accommodated in the slide. The spring 63 in the overlapping thickness dimension of the member 75 and the ejector rod 58. Furthermore, the spring 63 is fixed between the protrusion 79 protruding from the slider 75 and the protrusion 80 protruding from the push rod 58 inside the cutout 81 . In addition, at this time, the positional relationship between the engaging portion 61 of the ejector rod 58 and the injection button-integrated driving rod 57 is such that the injection button-integrated driving rod 57 cannot freely move in the engaging portion 61 . That is, it is a state where the injection button cannot be pushed.

Next, in FIG. 13 , when the injection needle is attached to the liquid medicine cartridge 52 , the front end 58 a of the plunger 58 is pushed to the position of the front end of the slider 75 . Then, the spring 63 in the cutout 81 is compressed from the state of FIG. 12(b), and this state is maintained. On the other hand, the positional relationship between the engagement portion 61 of the ejector rod 58 and the injection button-integrated drive lever 57 is such that the injection button-integrated drive lever 57 can move freely. That is, it is a state where the injection button can be pushed.

14 and 15, when the injection needle is attached to the drug solution cartridge 52, the principle that the drug solution cartridge 52 cannot be accommodated in the drug injection device body 66 and the principle that it can be accommodated in the drug injection device body 66 will be described. .

In FIG. 14 , when the injection needle is not attached to the liquid medicine cartridge 52 , the front end 58 a of the plunger 58 protrudes toward the injection needle more than the front end of the slider 75 . At this time, the pushing head 76 that is pushed upward by a spring not shown in the figure passes through the two notches (opening) 73 on the push rod 58 and the notch (opening) 83 on the slider 75. The state of the (opening portion) blocks the slider 75 so that it can neither move toward the direction of the injection needle nor move in the direction opposite to it. Furthermore, the ejector head 76 is disposed perpendicular to the slider 75 and the ejector rod 58, and is in a state always pushed upward by a spring in FIGS. 14 and 15 .

Hereinafter, in FIG. 15 , when the injection needle is mounted on the liquid medicine cartridge 52 , the front end portion 58 a of the plunger 58 is at the same position as the front end of the slider 75 . In the process of tightening (installing) the injection needle on the liquid medicine cartridge 52, since the inner side of the notch 73 of the ejector rod 58 pushes the inclined portion 76a of the ejection head 76 in the direction of the arrow, the ejection head 76 is gradually pressed toward the direction of the arrow. below. Furthermore, when the injection needle is tightened, the notch 73 on the plunger 58 moves in a direction to further press the inclined portion 76a of the plunger 76 downward. And when the injection needle is installed on the liquid medicine cylinder 52 completely, the slit 73 on the push rod 58 will push down the front end of the push head 76 and go over it, and the push head 76 is located in the slit 83 of the slider 75, for The direction opposite to the arrow holds the state of the slider 75 .

In order to store the drug solution cartridge 52 in the drug injector body 66 from this state, the drug solution cartridge 52 disposed on the slider 75 is moved in the direction of the arrow together with the slider 75 .

Actually, as described in FIG. 11 , although it is fixed in the form of moving in the liquid medicine cartridge gland 67 , only the principle will be described here.

Now, if the liquid medicine cartridge 52 on the slider 75 is moved in the direction of the arrow together with the slider 75, that is, to the right in FIG. If it is further moved in the direction of the arrow from this point, the ejector head 76 is pressed to the lower side by the slider 75, and if the slider 75 is further moved in the direction of the arrow, the front end of the ejector head 76 is fitted into the notch 78 of the slider 75. At the same time, the front end of the ejector head 76 locks the slider 75 at this position so that it cannot move in the direction opposite to the arrow.

It is Fig. 13 (a) that shows this state, in order to remove this state, since the sliding knob integrated with the ejector head 76 stretches out to the outside of the drug delivery device body 66 as a knob, by forcing it gently with your fingers Press down the above-mentioned sliding knob to perform release operation.

In addition, in the case of mixing two kinds of medical solutions in the drug delivery device body, or dissolving and mixing the drug and the drug solution as described in FIG. Therefore, it cannot be mixed.

In this way, according to the present embodiment 3, due to its structure, when the injection needle is not installed on the drug delivery device, the injection button or the drug delivery button cannot be pushed, and the plunger for extruding the drug solution does not move. In the case of a drug delivery device, since the structure cannot be mixed when the injection needle is not attached to the drug delivery device, even if you want to press the injection button or the drug delivery button by mistake when the injection needle is not attached to the drug delivery device, It cannot be pressed down, which can prevent the leakage of liquid medicine or the glass tube of medicine liquid caused by misoperation from breaking.

Example 4

This fourth embodiment corresponds to the inventions of claims 27 to 32, and displays a warning to remind attention to exhaust air during injection on the medical drug delivery device to which the electronic device is added.

Hereinafter, Embodiment 4 of the present invention will be described with reference to FIGS. 16 to 18 . 16 shows a perspective view of the appearance of the medical drug delivery device according to Embodiment 4 of the present invention before the injection needle is attached, FIG. 17 is a partial cross-sectional view of the medical drug delivery device of Embodiment 4, and FIG. block diagram.

In FIG. 16 , 102 is a cap for the main body, 103 is the main body of the medical drug injector, 104 is a display unit, 105 is an indicator for setting the dose, 106 is an injection button, and 127 is a speaker.

First, the case of using the medical drug injection device for the first time will be described. In Fig. 16 and Fig. 17, if the body cap 102 is removed from the medical drug injection device body 103, the switch (first switch) 110 provided on the medical drug injection device body 103 changes from ON to ON. disconnected (OFF). At this time, all the function displays displayed on the display unit 104 are lighted up, and after a few seconds, only the calendar, time, and dosage are displayed.

In addition, in FIG. 17, the parts of the screwing parts 109a and 109b of the medical drug injection device main body 103 are engaged together with respective threads. Rotating the threaded (screwed) coupling parts 109a, 109b in the direction of unscrewing the thread can separate them from the state of one medical drug delivery device body 103 into two screwed bodies 103a, 103b. After separation, fix the drug solution cartridge on the screw body 103a, and then engage the screw body 103a and 103b with the screw parts 109a and 109b to make it rotate in the direction of fixing the screw body 103a and 103b, so that it is the original The form of the medical administration device 103 . Then, the drug solution cartridge detection switch (second switch) 111 provided inside the medical drug injector 103 is turned from OFF to ON.

When this state is reached, the display unit 104 starts to blink and display the characters "exhaust". Simultaneously with the above-mentioned flashing display, a sound of "please ventilate" is emitted from the speaker 127 . The administerer attaches the injection needle 101 , with the injection needle 101 facing upward and the injection button 106 facing downward, and pushes the injection button 106 until the drug solution 126 comes out of the injection needle 101 . Then, the switch 113 (equivalent to the switch 413 in FIG. 32 described in the prior art) is turned on once and turned off again. The state of the switch 113 can also be used to determine the completion of the exhaust, and the microprocessor (exhaust display signal generation unit) 125 determines that the exhaust is completed.

And, the flickering of the above-described "exhaust" characters and the notification by voice continue until the microprocessor 125 determines that the state of the switch 113 is exhaust completion. In addition, the microprocessor (exhaust sound generating unit) 125 in FIG. 18 issues the state judgment of the switch 110 and the switch 111, a display command to the display unit 104, and a voice report command. That is, these microprocessor 125, display unit 104, and speaker 127 constitute an exhaust notification unit. In addition, in FIG. 18, 123 is a calendar which generates date information, and 124 is a clock which generates time information.

Next, the state where the above-mentioned drug solution cartridge 107 is already fixed to the medical drug delivery device 103, that is, the case where the drug is administered for the second time or later, will be described. When the main body cap 102 is detached from the medical drug injector 103, the switch 110 provided on the medical drug injector main body 103 is turned from ON to OFF. At this time, all the function displays displayed on the display unit 104 are lighted up, and after a few seconds, only the calendar, time and dosage are displayed.

Next, the words "exhaust" are flashed on the display unit 104, and at the same time, the sound of "exhaust please" is emitted from the speaker 127. The user attaches the injection needle 101 , and with the injection needle 101 facing upward and the injection button 106 facing downward, pushes the injection button 106 until the drug solution 126 comes out of the injection needle 101 . Then, similar to the above-mentioned occasion of first use, the microprocessor 125 observes the state of the switch 113, and if it is judged that the exhaust is completed, the text display of "exhaust" is canceled, and the report of "please exhaust" by voice is also stopped.

And the mechanism for detecting the end of injection, the mechanism for detecting the amount of injection liquid administered, the mechanism for recording the amount of injection liquid for administration, and simultaneously recording the amount of injection, date, and time for detecting the end of injection and detecting the amount of injection liquid for administration 1. The mechanism for displaying is the same as that described in the prior art.

In addition, in the above-mentioned description, symbols or graphics may be used in addition to characters for displaying reminders of exhaust gas. In addition, either display or sound may be used to remind the user to perform the exhaust operation.

In this way, according to the fourth embodiment, when the body cap attached to cover the injection needle-mounted part of the medical injection device body to which the injection needle is mounted is detached, the display part displays the characters "exhaust", Therefore, the user of the liquid medicine can be made aware of the need to perform the exhaust operation before administration, and can be reminded to perform the "exhaust" operation.

Example 5

This embodiment 5 corresponds to the invention of claim 33 to claim 38, and the medical drug delivery device with an electronic device can solve the problem of storing the amount of injection liquid when emptying when it is not distinguished from the original injection. suitable situation.

Hereinafter, Embodiment 5 of the present invention will be described with reference to FIGS. 19 to 23 . Fig. 19 is a block diagram centering on the microprocessor 125 of the medical drug delivery device according to the fifth embodiment of the present invention. In addition, FIG. 20 is a perspective view showing the appearance of a medical drug delivery device according to Embodiment 5 of the present invention, FIG. 21 is a partial cross-sectional view thereof, and FIG. 22 is a cross-sectional view of a medical drug delivery device according to another embodiment. FIG. 22. Partial cross-sectional view of the medical drug delivery device.

In FIG. 20, 102 is a needle attachment, 103 is a medical drug injection device body, 104 is a display unit, 105 is an indicator for setting a dose, and 106 is an injection button. The needle stick attachment 102 is configured to slide toward the injection button 106 while the injection needle 101 is piercing the skin.

In FIG. 21, the needle attachment 102 is shorter than the injection needle relative to the length direction of the injection needle, and slides when the injection needle is inserted into the skin to turn on switches (third switches) 109a and 109b provided in the main body. Since the switches 109a and 109b are turned on, the microprocessor 125 can judge that the injection needle has penetrated the skin.

In addition, the medicine injection end detection mechanism, when the switch not shown in the figure (equivalent to the switch 113 in Fig. 18 and the switch 413 in Fig. 32 described in the prior art) is in the state of being turned on once and then turned off again, the microprocessing The device 125 judges to realize. That is to say, during the period when the switches 109a and 109b are turned on, and only when the state of the unillustrated switch is the end of the administration, the microprocessor 125 makes a judgment, and records the injection volume, date and time. into memory 122.

On the other hand, since the injection needle 101 is directed upward and the injection button 106 is directed downward during exhaust, and the exhaust is performed in the air, the needle attachment 102 does not operate, and the switches 109a and 109b are kept off. status. At this time, even if the injection button 106 is pushed, the switch 113 is once turned on and then turned off, and the administration is completed, the switches 109a and 109b are still in the off state, so the microprocessor 125 determines that the history of the injection volume, date, and time will not be recorded. recorded in memory. In this way, only when the injection needle 101 actually penetrates the skin and the administration is completed, the injection volume, date, and time are recorded in the memory 122 as history, and the history at the time of exhaust is not recorded. Furthermore, which one of the switches 109a and 109b can be detected from the shape of the needle pricking attachment.

Shown in Fig. 22 is the structural form that can gather this switch 109a and 109b into one, in Fig. 22, 140 is the needle stick detection switch (the 3rd switch), 103 is medical medicine injector main body, 104 is display part, 105 Is the dosage setting indicator, 106 is the injection button. The needle stick detection switch 140 is made on the same side as the injection needle 101 so that the main body of the drug delivery device does not shake during drug administration, and a stable skin contact part 141 is provided.

In FIG. 23 , the needle stick detection switch 140 is turned on approximately at the same time as the injection needle is inserted into the skin. Since the switch of the needle stick detection switch 140 is on, the microprocessor 125 can be judged that the injection needle has been pierced into the skin.

In addition, the end-of-dosing detection mechanism is realized by judgment by the microprocessor 125 when the switch 113 of FIG. . The detection mechanism of the injection volume is the same as that described in the prior art. That is to say, during the switch-on period of the needle sticking detection switch 140, and only when the state of the switch 113 is the end of the administration, it is judged by the microprocessor 125 (controller), and the amount of the injection solution and the date and time are determined. It is recorded in the memory (injection solution volume recording unit) 122 .

On the other hand, since the injection needle 101 is directed upward and the injection button 106 is directed downward during exhaust, and the exhaust is performed in the air, the needle stick detection switch 140 is turned off. At this time, even if the injection button 106 is pushed, the switch 113 is once turned on and then turned off, and the needle stick detection switch 140 is also in the off state for the end of administration. The history is recorded in the memory 122 .

In this way, only when the injection needle penetrates the skin and the administration is completed, the injection volume, date, and time are recorded in the memory 122 as a history, and the history at the time of exhaust is not recorded. Furthermore, the closer the position of the needle stick detection switch 140 is to the injection needle 101, the more effective the detection when the injection needle 101 touches the skin.

The present invention can be applied to a medical drug delivery device used for administration of injections, etc., and is an optimal medical drug delivery device capable of alleviating the pain of a drug recipient and administering drugs safely and reliably.

Claims (4)

1. A medical dosing device, comprising an exhaust notification unit for reminding the doser to perform an exhaust operation to remove the air remaining in the liquid medicine chamber of the dosing device before injection, characterized in that: The above-mentioned exhaust notification unit has: a first switch that detects removal of the cap for the body, the cap for the body being mounted to cover the body portion of the medical drug delivery device to which the injection needle is mounted; When the switch detects that the cap for the main body is removed, the exhaust display signal generating part generates a display signal of characters, symbols or graphics to remind the injector to perform the exhaust operation; A display unit that displays a display signal of a character, a symbol or a graphic reminding to perform the above-mentioned exhaust operation, When the main body cap attached to cover the main body of the medical drug injector to which the injection needle is attached is detached, a character, a mark, or a figure is displayed to remind the drug injector to perform an exhaust operation. 2. A medical dosing device, comprising an exhaust notification unit for reminding the doser to perform an exhaust operation to remove the air remaining in the liquid medicine chamber of the dosing device before injection, characterized in that: The above-mentioned exhaust notification unit has: a first switch that detects removal of the cap for the body, the cap for the body being mounted to cover the body portion of the medical drug delivery device to which the injection needle is mounted; A second switch for detecting that the above-mentioned liquid medicine chamber is fixed in the main body of the medical drug delivery device; An exhaust display signal generating unit that detects that the cap for the main body is removed when the first switch detects that the liquid medicine chamber is fixed to the main body of the medical injection device when the second switch detects In case of exhaustion, generate display signals of text, symbols or graphics to remind the injector to carry out the exhaust operation; A display unit that displays a display signal of a character, a symbol or a graphic reminding to perform the above-mentioned exhaust operation, When the cap for the main body is detached and the liquid medicine chamber is fixed in the main body of the medical drug delivery device, a character, a mark or a figure is displayed to remind the drug injector to perform an exhaust operation. 3. A medical dosing device, comprising an exhaust notification unit for reminding the doser to perform an exhaust operation to remove the air remaining in the liquid medicine chamber of the dosing device before injection, characterized in that: The above-mentioned exhaust notification unit has: a first switch that detects removal of the cap for the body, the cap for the body being mounted to cover the body portion of the medical drug delivery device to which the injection needle is mounted; When the switch detects that the body cap is removed, an exhaust sound signal generating part that generates an sound signal reminding the injector to perform an exhaust operation; a loudspeaker for the sound of an audible signal reminding to carry out the above-mentioned exhausting operation, When the cap for the main body is detached, a sound is emitted to remind the injector to perform an exhaust operation. 4. A medical dosing device, comprising an exhaust notification unit for reminding the doser to perform an exhaust operation to remove the air remaining in the liquid medicine chamber of the dosing device before injection, characterized in that: The above-mentioned exhaust notification unit has: a first switch that detects removal of the cap for the body, the cap for the body being mounted to cover the body portion of the medical drug delivery device to which the injection needle is mounted; A second switch for detecting that the above-mentioned liquid medicine chamber is fixed in the main body of the medical drug delivery device; An exhaust sound signal generating unit that detects that the cap for the main body is removed at the first switch and that the liquid medicine chamber is fixed to the main body of the medical drug injection device at the second switch. When the gas is released, a sound signal is generated to remind the user to perform the exhaust operation; a loudspeaker for the sound of an audible signal reminding to carry out the above-mentioned exhausting operation, When the cap for the main body is detached and the liquid medicine chamber is fixed in the main body of the medical drug delivery device, a sound is emitted to remind the drug injector to perform an exhaust operation.

Images