WO2017038483A1 - Syringe pump - Google Patents

Abstract

[Problem] To provide a syringe pump with which it is possible for information relating to a syringe, said information being provided on a syringe body, to be recognized correctly when the syringe has been installed in a syringe pump. [Solution] This syringe pump 1 is provided with: a loading portion 6 in which a syringe body 201 (301) can be loaded; a main body flange gripping portion 500 which detachably grips a main body flange 209 (309); and an RF reception portion 610, for example, serving as an information reception portion which, in a state in which the main body flange 209 (309) has been positioned in and is being gripped by the main body flange gripping portion in a certain position in the direction of rotation about the axis of a syringe 200 (300), receives information relating to the syringe, provided on the syringe body 201 (301); wherein the main body flange gripping portion 500 is provided with a rotation preventing portion (first stopper portion 651, second stopper portion 652) which prevents the main body flange 209 (309) from rotating when the main body flange 209 (309) has been positioned and is being gripped in said certain position in the direction of rotation.

Description

Syringe pump

The present invention relates to a syringe pump for mounting a syringe and feeding a drug solution in the syringe to a patient.

Syringe pumps are used, for example, in the intensive care unit (ICU), etc., and perform high-accuracy treatments for the delivery of chemicals such as anticancer agents, anesthetics, chemotherapeutic agents, blood transfusion products, and nutrients to patients. Used for relatively long time. The syringe liquid flow rate control is precise and superior compared to other infusion pumps.

In treatment rooms and operating rooms that use syringe pumps, multiple types of syringes with different capacities are prepared in advance. A medical worker selects a required amount of syringe from a plurality of types of syringes, and attaches the selected amount of syringe to the above-described syringe pump.

When the syringe is attached to the accommodation part of the syringe pump, the main body flange of the syringe body is gripped by being fitted into the grip part of the syringe pump. The pusher flange of the syringe pusher is held by a slider as a moving member.

Thus, when the motor of the syringe pump is driven, the slider pushes the syringe pusher toward the syringe main body little by little, so that the syringe pusher pushes out the liquid medicine in the syringe main body and sends it to the patient through the tube. (See Patent Document 1).
Patent Document 2 discloses a syringe in which information related to a syringe is stored in a storage device disposed on a main body flange.

JP 2012-170786 A Japanese National Patent Publication No. 8-509402

Even if the main body flange is fitted and held in the holding part of the syringe pump, the position of the main body flange in the rotation direction relative to the axial direction of the syringe may not be the correct position with respect to the syringe pump.

In this case, the information regarding the syringe memorize | stored in the memory | storage device of a main body flange cannot be recognized by the syringe pump side. In this case, the syringe pump cannot recognize information such as the type of chemical solution in the syringe, for example, and the syringe pump cannot send liquid using such information.
Then, an object of this invention is to provide the syringe pump which can recognize correctly the information regarding the syringe provided in the syringe main body when a syringe is mounted | worn with a syringe pump.

The syringe pump according to the present invention is a syringe pump that attaches a syringe and feeds a chemical solution in the syringe, and attaches and detaches a mounting portion on which the syringe body of the syringe can be mounted and a body flange of the syringe body The main body flange gripping portion that can be gripped, and the main body flange in the main body flange gripping portion are positioned and gripped at a position in a predetermined rotation direction centered on the syringe axis. An information receiving unit that receives information about the provided syringe, and the main body flange gripping unit rotates while the main body flange is positioned and gripped at a position in the predetermined rotation direction. A syringe pump comprising a rotation preventing portion for preventing the rotation.

According to the above configuration, the rotation prevention portion of the main body flange gripping portion prevents the main body flange from rotating in a state where the main body flange is positioned and held at a position in the predetermined rotation direction in the main body flange gripping portion. be able to. For this reason, since the main body flange can always be positioned at a position in the correct rotation direction while being gripped by the main body flange gripping portion, information on the syringe provided in the syringe body is attached to the syringe pump. Sometimes it can be recognized correctly. Therefore, the syringe pump recognizes information such as the type of chemical solution in the syringe, and can send the syringe pump.

Preferably, the rotation prevention unit rotates in a second rotation direction in which the main body flange prevents the main body flange from rotating in the first rotation direction, and the main body flange rotates in a direction opposite to the first rotation direction. And a second stopper portion for preventing this from occurring.
According to the above configuration, the first stopper portion and the second stopper portion of the rotation prevention portion can prevent the main body flange from rotating in both directions, and the main body flange is always properly held by the main body flange gripping portion. It can be positioned at a position in the rotational direction.

Preferably, the first stopper portion prevents the main body flange from rotating in the first rotation direction by hitting a first edge portion of the main body flange, and the second stopper portion is configured to prevent the main body flange from rotating. The main body flange is prevented from rotating in the second rotation direction by hitting the second edge portion opposite to the first edge portion.
Preferably, the main body flange gripping portion includes a first leaf spring portion, a second leaf spring portion, and a center portion, and the first leaf spring portion and the second leaf spring portion fix the center portion. The first leaf spring portion is provided with the first stopper portion at the end portion of the first leaf spring portion, and the second leaf spring portion is provided with the second portion at the end portion of the second leaf spring portion. A stopper is provided.

Preferably, the main body flange gripping portion has a metal spring and a resin spring covering the metal spring, and the first end of the resin spring hits the first edge portion of the main body flange. The first stopper portion for preventing the main body flange from rotating in the first rotation direction is provided, and a second end portion of the resin spring is provided on a second side opposite to the first edge portion of the main body flange. The second stopper portion that prevents the main body flange from rotating in the second rotation direction by hitting two edge portions is provided.
According to the above configuration, the first stopper portion and the second stopper portion of the rotation prevention portion provided on the resin spring can prevent the main body flange from rotating in both directions, and the main body flange is always attached to the main body flange gripping portion. The gripper can be positioned at the correct rotational position. Since the durable metal spring can support the resin spring, the first stopper portion and the second stopper portion of the resin spring can reliably prevent the body flange from rotating in both directions. In addition, since the first stopper portion and the second stopper portion of the resin spring directly contact the main body flange and the metal spring does not hit the main body flange, the main body flange is hardly damaged.

Preferably, the main body flange gripping portion has a resin spring, and the main body flange rotates in the first rotation direction by hitting a first edge portion of the main body flange at a first end portion of the resin spring. The first stopper portion is provided, and the second end portion of the resin spring hits the second edge portion on the opposite side of the first edge portion of the main body flange, whereby the main body flange is moved to the second end portion. The said 2nd stopper part which blocks | prevents rotating in 2 rotation directions is provided.

According to the above configuration, the first stopper portion and the second stopper portion of the rotation prevention portion provided on the resin spring can prevent the main body flange from rotating in both directions, and the main body flange is always attached to the main body flange gripping portion. The gripper can be positioned at the correct rotational position. In addition, since the first stopper portion and the second stopper portion of the resin spring directly contact the main body flange and the metal spring does not hit the main body flange, the main body flange is hardly damaged.

Preferably, the main body flange gripping portion has a metal spring, and the main body flange rotates in the first rotation direction by hitting a first edge portion of the main body flange at a first end portion of the metal spring. The first stopper portion is provided, and the other end portion of the metal spring hits the second edge portion opposite to the first edge portion of the body flange, so that the body flange is in the second position. The said 2nd stopper part which blocks | prevents rotating in a rotation direction is provided.
According to the above configuration, the first stopper portion and the second stopper portion of the rotation preventing portion provided on the metal spring can prevent the main body flange from rotating in both directions, and the main body flange is Therefore, it can be positioned at the position in the correct rotational direction while being always held by the main body flange holding portion.

Preferably, the main body flange gripping portion includes a first metal spring and a second metal spring, and the first metal spring hits a first edge portion of the main body flange so that the main body flange is in the first rotation direction. And the second metal spring hits a second edge portion opposite to the first edge portion of the main body flange, so that the main body flange rotates the second rotation. It is the said 2nd stopper part which blocks | prevents rotating in a direction.

According to the above configuration, the first metal spring is the first stopper portion, the second metal spring is the second stopper portion, and the metal first stopper portion and the second stopper portion are simple in structure. The main body flange can be prevented from rotating in both directions, and the main body flange can always be positioned at the position in the correct rotational direction while being gripped by the main body flange gripping portion.

The present invention can provide a syringe pump capable of correctly recognizing information related to the syringe provided in the syringe body when the syringe is attached to the syringe pump.

The perspective view which shows preferable embodiment of the syringe pump of this invention. The perspective view which looked at the syringe pump shown in FIG. 1 from the W direction. The perspective view which shows the example of the syringe of several types of magnitude | sizes. The figure which shows the electrical structural example in a syringe pump. The perspective view which shows a part of syringe setting part and syringe pusher drive part which are shown in FIG. The perspective view which expanded and looked at a part of the syringe setting part and syringe pusher drive part shown in FIG. 5 from E direction. FIG. 7A shows a state before the main body flange is gripped at the correct rotational direction by the main body flange gripping portion, and FIG. 7B shows the main flange at the correct rotational direction position by the main body flange gripping portion. The perspective view which shows the state hold | gripped by. The side view which has a partial cross section which shows the main body flange etc. which were seen from X1 direction in FIG.7 (B). The perspective view of a main-body flange holding part. The disassembled perspective view of the main body flange holding part shown in FIG. The perspective view which shows the state which has arrange | positioned the metal leaf | plate spring. The perspective view seen from another angle which shows the state which fixed the metal leaf | plate spring. In FIG. 12, the figure which looked at the resin spring receiving part and the vicinity of a metal leaf | plate spring from the arrow J1 direction. The perspective view which shows 2nd Embodiment of this invention. The figure which shows 3rd Embodiment of this invention. The figure which shows 4th Embodiment of this invention. The side view of 4th Embodiment of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.
<First Embodiment>
FIG. 1 is a perspective view showing a first embodiment of the syringe pump of the present invention. FIG. 2 is a perspective view of the syringe pump shown in FIG. 1 as viewed from the W direction.
A syringe pump 1 shown in FIGS. 1 and 2 is used, for example, in an intensive care unit or the like. A micro continuous infusion pump that performs treatment for a relatively long time with high accuracy.

As shown in FIGS. 1 and 2, the syringe pump 1 can mount and fix a syringe body 201 of a syringe 200 filled with a chemical solution, for example, using a clamp 5 so as not to move.
The motor 133 of the syringe pusher drive unit 7 shown in FIG. 2 rotates the feed screw 135, so that the syringe pusher pressing member 10 of the syringe pusher drive unit 7 moves the syringe pusher 202 of the syringe 200 to the syringe body. It can be pressed in the T direction toward the 201 side. Thereby, the chemical | medical solution in the syringe main body 201 is accurately sent with respect to the patient P through the tube 203 and the indwelling needle 204 as shown in FIG.

The syringe pusher pressing member 10 is an example of a moving member for moving the syringe pusher 202 toward the syringe body 201 while holding the syringe pusher 202, and is also referred to as a slider.
As shown in FIG. 2, the syringe pump 1 includes a housing 2, and the housing 2 is integrally formed of a molded resin material having chemical resistance. As shown in FIG. 1, the housing 2 is configured as a box having liquid-tight performance by joining and assembling a front cover 2F and a rear cover 2R. Thereby, as will be described later, even if a chemical solution or moisture is applied, it has a splash-proof and drip-proof (waterproof) treatment structure that can prevent the syringe pump 1 from entering the inside.

First, each element arrange | positioned at the housing | casing 2 of the syringe pump 1 is demonstrated.
As shown in FIG. 2, the syringe pump 1 has a housing 2 and a handle 2T. A display unit 3 and an operation panel unit 4 are disposed on the upper portion 2A of the housing 2. A placement portion 6 and a syringe pusher drive portion 7 are disposed on the lower portion 2B of the housing 2.
Thereby, the medical worker can perform the liquid feeding operation from the syringe 200 while visually confirming the information content displayed in color on the display unit 3 of the upper portion 2A of the housing 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while confirming the information content displayed in color on the display unit 3 of the housing 2.

The display unit 3 shown in FIGS. 1 and 2 is a color liquid crystal display (LCD) capable of color graphic display. The display unit 3 is located at the upper left position of the upper portion 2 </ b> A of the housing 2 and is located above the placement unit 6 and the syringe pusher drive unit 7. The operation panel unit 4 is disposed on the right side of the display unit 3 in the upper portion 2A of the housing 2. The operation panel unit 4 includes operation buttons such as a pilot lamp 4A, a fast-forward switch button 4B, and a start switch in the illustrated example. A button 4C, a stop switch button 4D, a menu selection button 4E, a power switch 4F, and the like are arranged.

2 has an upper part 2A and a lower part 2B. In the example shown in FIGS. 1 and 2, the placement unit 6 and the syringe pusher drive unit 7 are arranged side by side along the X direction (also referred to as the longitudinal axis direction). The mounting unit 6 can be mounted by selecting, for example, a syringe 200 having a large accommodation amount from a plurality of types of syringes having different accommodation amounts and detachably fitting them.

1 and 2 includes a housing portion 8 for housing the syringe body 201, a clamp 5, and a body flange gripping portion 500 for detachably fitting and gripping the body flange 209. Yes. The accommodating part 8 has a concave syringe body holding part 8D. A tube fixing portion 9 for detachably sandwiching the tube 203 is formed in the wall portion at the left end of the housing portion 8. The tube fixing portion 9 is a groove portion that sandwiches and fixes a portion of the tube 203 as shown in FIG.

1 and 2, when a medical worker operates the clamp 5 and removes the syringe 200 from the placement portion 6, for example, the clamp 5 is against the force of a spring (not shown) in the Y1 direction (frontward direction). And the clamp 5 is separated from the outer peripheral surface of the syringe body 201 by turning 90 degrees in the R1 direction. As a result, the syringe body 201 can be released from the syringe body holding portion 8D of the housing portion 8 and the tube 203 can be removed from the tube fixing portion 9 by releasing the fixation by the clamp 5.

Further, when the syringe 5 is accommodated and attached in the accommodating portion 8 of the mounting portion 6 by operating the clamp 5, the clamp 5 is pulled in the Y1 direction against the force of a spring (not shown) and is 90 in the R2 direction. Turn it back and return to the Y2 direction by the spring force. Thereby, the syringe body 201 can be fixed by the clamp 5 in a state where the syringe 203 is housed in the syringe body holding portion 8D of the housing portion 8 and the tube 203 is fitted in the tube fixing portion 9.

As shown in FIGS. 1 and 2, when the syringe body 201 is housed and mounted in the syringe body holding section 8D of the housing section 8, the syringe pusher 202 is disposed in the syringe pusher drive section 7. The syringe pusher drive unit 7 includes a syringe pusher pressing member 10. When the motor 133 in FIG. 2 is driven by the command from the control unit and the feed screw 135 rotates, the syringe pusher pressing member 10 moves the pusher flange 205 of the syringe pusher 202 in the T direction toward the syringe body 201 side. Push along little by little. The feed screw 135 is a guide member for guiding the syringe pusher pressing member 10 little by little toward the housing portion 8 side.

Thereby, the drug solution in the syringe body 201 can be delivered to the patient P with high accuracy over a relatively long time through the tube 203 and the indwelling needle 204. Note that the X, Y, and Z directions in FIGS. 1 and 2 are orthogonal to each other. The X direction is the longitudinal axis direction of the accommodating portion 8 of the syringe pump 1, the Y direction is the front-rear direction of the syringe pump 1, and the Z direction is the up-down direction of the syringe pump 1.

FIG. 3 is a perspective view showing an example of a plurality of types of sizes of syringes. In FIG. 1 and FIG. 2, as an example, a syringe 200 having the largest amount of medicinal solution is fixed.
The syringe 200 having the largest chemical solution capacity shown in FIG. 3A has a syringe body 201 and a syringe pusher 202, the syringe body 201 has a body flange 209, and the syringe pusher 202 is pushed. A child flange 205 is provided. The syringe body 201 has a medicinal liquid scale 210. One end of a flexible tube 203 is detachably connected to the outlet 211 of the syringe body 201.

A syringe 300 having a medium amount of chemical solution shown in FIG. 3B has a syringe body 301 and a syringe pusher 302, the syringe body 301 has a body flange 309, and the syringe pusher 302 is A pusher flange 305 is provided. The syringe main body 301 is formed with a scale 310 of a chemical solution. One end of a flexible tube 203 is detachably connected to the outlet 311 of the syringe body 301.
The syringe 200 illustrated in FIG. 3A has, for example, a chemical liquid capacity of 50 mL, and the syringe 300 illustrated in FIG. 3B has, for example, a chemical liquid capacity of 30 mL.

The syringe bodies 201 and 301 of the syringes 200 and 300 shown in FIG. The syringe bodies 201 and 301 of the syringes 200 and 300 can be housed and fixed in the syringe body holding section 8D of the housing section 8 as shown in FIGS.

Next, with reference to FIG. 4, an example of the electrical configuration of the syringe pump 1 shown in FIGS. 1 and 2 will be described.
In FIG. 4, the syringe pump 1 has a control unit (computer) 100 that controls the overall operation. The control unit 100 is a one-chip microcomputer, for example, and includes a ROM (read only memory) 101, a RAM (random access memory) 102, a nonvolatile memory 103, and a clock 104. The clock 104 can correct the current time by a predetermined operation, and can acquire the current time, measure the elapsed time of a predetermined liquid feeding operation, measure the reference time of liquid feeding speed control, and the like.

The control unit 100 shown in FIG. 4 is connected to a power switch button 4F and a switch 111. The switch 111 supplies power to the control unit 100 from either the power converter unit 112 or the rechargeable battery 113 by switching between the power converter unit 112 and the rechargeable battery 113 such as a lithium ion battery. The power converter unit 112 is connected to a commercial AC power source 115 via an outlet 114. In FIG. 4, for example, a pair of detection switches 120 and 121 are arranged in the housing portion 8. The detection switches 120 and 121 detect whether any of the syringe main bodies of a plurality of types of syringes, for example, the syringe main body 201 of the syringe 200 is correctly arranged in the storage unit 8 and notify the control unit 100 of it.

A potentiometer 122 as a clamp sensor shown in FIG. 4 is connected to the clamp 5. The potentiometer 122 detects the amount of movement of the clamp 5 when the clamp 5 moves in the Y2 direction with the syringe body 201 clamped by the clamp 5. Thereby, a detection signal is sent to the control unit 100 to notify which accommodation amount of the syringe body 201 (301) is clamped by the clamp 5. The control unit 100 obtains the amount of movement of the clamp 5 in the Y direction based on the detection signal from the potentiometer 122, and for example, which of the multiple types of syringe bodies 201 and 301 shown in FIG. Can be determined.

When the motor 133 of the syringe pusher driving unit 7 shown in FIG. 4 is driven by the motor driver 134 according to the command of the control unit 100, the feed screw 135 is rotated to move the syringe pusher pressing member 10 in the T direction. As a result, the syringe pusher pressing member 10 presses the syringe pusher 202 in the T direction so that the drug solution in the syringe main body 201 shown in FIG. To liquid.

In FIG. 4, the display unit driver 130 drives the display unit 3 in response to a command from the control unit 100 to display various information, notification contents, and the like. The speaker 131 notifies various notification contents according to instructions from the control unit 100. The control unit 100 can bidirectionally communicate with an external computer 141 such as a desktop computer through the communication port 140. The external computer 141 is connected to a chemical solution database (DB) 150, and the chemical solution information MF stored in the chemical solution database 150 is acquired by the control unit 100 via the external computer 141, and is stored in the control unit 100. It can be stored in the nonvolatile memory 103. The control unit 100 can display the chemical information MF and the like on the display unit 3 based on the stored chemical information MF.

4, the fast forward switch button 4B, the start switch button 4C, the stop switch button 4D, the menu selection button 4E, and the power switch 4F are electrically connected to the control unit 100.

Next, the detailed structure of the mounting portion 6 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view showing a part of the placement unit 6 and the syringe pusher drive unit 7 shown in FIG. 6 is a perspective view of a part of the placement unit 6 and the syringe pusher driving unit 7 shown in FIG.
The mounting unit 6 illustrated in FIG. 5 includes a housing unit 8 that houses the syringe body 201, a clamp 5, and a body flange gripping unit 500 that grips the body flange 209 (see FIG. 3) of the syringe 200. ing.

As shown in FIG. 1 and FIG. 2, as an example, the syringe body 201 of the syringe 200 is set on the placement unit 6, and the syringe body 201 of the syringe 200 is fixed using the clamp 5. As shown in FIGS. 5 and 6, the accommodating portion 8 of the placement portion 6 is a concave portion that can accommodate the syringe body 201, and is along the X direction that is the longitudinal axis direction of the accommodating portion 8. A part of the outer peripheral surface of the syringe main body 201 is in close contact with the inner surface of the syringe main body holding portion 8D of the housing portion 8, and the remaining portion of the outer peripheral surface of the syringe main body 201 is exposed to the outside.

Referring to FIGS. 5 and 6, the shape of the main body flange gripping portion 500 will be described. The shape of the main body flange gripping portion 500 is merely an example, and the main body flange gripping portion 500 is not limited to this shape. The main body flange gripping portion 500 is disposed along a surface formed in the Y direction and the Z direction.

As shown in FIGS. 5 and 6, the main body flange gripping portion 500 has a tip portion 501. As shown in FIG. 6, the distal end portion 501 preferably has two introduction portions 502 and 503 and a concave portion 504 formed between these introduction portions 502 and 503. Thereby, as shown in FIGS. 1 and 2, the medical staff uses the two introduction portions 502 and 503 to connect the main body flange 209 of the syringe 200 to the inner surface of the main body flange gripping portion 500 and the syringe main body holding portion 8D. Can be easily inserted along the Y2 direction (see FIG. 1). Therefore, the main body flange gripping part 500 can securely grip and fix the main body flange 209.

Returning to FIG. 6, in a state where the syringe pump 1 is used, the introduction portion 502 is located on the upper side in the Z direction, and the introduction portion 503 is located on the lower side. A smaller recess 505 is preferably formed at the center of the recess 504. The small concave portion 505 is a groove portion for inserting a part of the blade portion of the syringe pusher 202 shown in FIG. 2 in a state where the syringe 200 is mounted. Thereby, the blade | wing part of the syringe presser 202 does not run on the surface of the recessed part 504 of the main body flange holding part 500. FIG. For this reason, the syringe 200 can be reliably fixed to a predetermined position. This applies not only to the syringe 200 but also to the syringe 300 shown in FIG.

The boot 800 as a covering member shown in FIGS. 5 and 6 is a member that can be elastically deformed and contracted when the syringe pusher 202 shown in FIG. 2 is pushed toward the syringe body 201 to send the liquid medicine in the syringe body 201. is there. As shown in FIG. 5, the boot 800 is disposed between the right side surface portion 8 </ b> V of the syringe body holding portion 8 </ b> D of the housing portion 8 and the gripping mechanism portion 80 of the syringe pusher pressing member 10. The boot 800 is made of, for example, rubber or plastic that can be expanded and contracted by elastic deformation, and can expand and contract as the syringe pusher pressing member 10 moves in the X1 direction and the X2 direction.

The boot 800 has a splash-proof structure to cover machine elements such as a guide bar and a shaft 136 shown in FIG. As a result, for example, even when a chemical solution in the syringe body 201 is spilled, a drip solution disposed above is spilled, or disinfecting liquid or moisture used in the vicinity is scattered, it is prevented from adhering to the machine element. .

As shown in FIG. 6, the left connecting portion 830 passes through the hole 599 of the main body flange gripping portion 500 and is fixed to the right side surface portion 8V side of the syringe main body holding portion 8D.
The gripping mechanism portion 80 shown in FIG. 5 is movable along the extension portion 2N along the X1 direction and the X2 direction (T direction). The medical staff can push down the operation lever 83 from the initial position in the P1 direction against the biasing force of the spring, or lift the operation lever 83 in the PR direction by the spring biasing force to return to the initial position.

When the medical worker pushes down the operation lever 83 in the P1 direction from the initial position, the grip members 81 and 82 are opened and spaced apart, and when the medical worker further presses the operation lever 83, the grip members 81 and 82 are opened. Open away from each other.
After the medical worker fits the pusher flange 205 of the syringe pusher 202 between the gripping members 81 and 82, when the medical worker releases the operation lever 83, the operation lever 83 is restored by the force of the spring. Accordingly, the gripping members 81 and 82 are moved in the X1 direction by the force of a spring (not shown) to press and hold the pusher flange 205 between the gripping mechanism portion 80 and the gripping mechanism portion 80. In addition, since the gripping members 81 and 82 are closed, the gripping members 81 and 82 can hold the syringe pusher 202 from both sides.

Next, an example of the shape of the main body flange 209 and an example of the structure of the main body flange gripping portion 500 to which the main body flange 209 is attached will be further described with reference to FIGS.
FIG. 7A shows a state before the main body flange 209 is gripped at a position in the correct rotational direction by the main body flange gripping portion 500, and FIG. 7B shows the main body flange 209 by the main body flange gripping portion 500. It is a perspective view which shows the state hold | gripped in the position of the correct rotation direction. FIG. 8B is a side view having a partial cross section showing the main body flange 209 and the like viewed from the X1 direction in FIG.
First, in FIG. 7 and FIG. 8, illustration of the syringe main body 201 and the syringe pusher 202 of the syringe shown in FIG. Although the main body flange 209 is taken as an example, the same applies to the main body flange 309 of the syringe main body 301 shown in FIG.

As shown in FIGS. 7 and 8, the main body flange 209 is preferably made of plastic and has a first extension 209S and a second extension 209T. The first extension portion 209S and the second extension portion 209T are formed in opposite directions with respect to the syringe axis (virtual center axis CL passing through the center of the syringe). The first extension portion 209S and the second extension portion 209T have the same shape, for example, are substantially trapezoidal. An RF tag TG is disposed in the first extension portion 209S. Information about the syringe is stored in advance in the RF tag TG.

On the other hand, the RF receiving unit 610 is disposed in the syringe pump 1 in the vicinity of the main body flange gripping unit 500 of the syringe pump 1. The RF receiving unit 610 and the RF tag TG for syringe recognition constitute an RFID 600. The RF receiving unit 610 of the RFID 600 uses wireless or electromagnetic induction to read information regarding the syringe 200 stored in the RF tag TG in a non-contact range within a very short distance.
That is, if the communication distance is long, it causes noise, and if data of another syringe is read, it causes an accident. For example, the proximity wireless communication technology in the range of 2 mm to 7.5 mm is used. Below the lower limit of the distance, there is a risk of hindering necessary data acquisition. If the upper limit of the distance is exceeded, there is a risk that erroneous data will be acquired when another syringe is present nearby. Therefore, as shown in FIG. 7A to be described later, it is preferable that the RF tag TG for syringe recognition can communicate at a distance positioned at a position almost overlapping with the RF receiver 610. In this case, a first stopper portion 651 and a second stopper portion 652 to be described later allow the RF receiving portion 610 to receive information on the syringe 200 stored in the RF tag TG with certainty. It is preferable to set so that the rotation around the central axis CL direction is within a range of 10 ° or less.
As shown in FIG. 8, the RF receiver 610 is gripped by positioning the main body flange 209 at a correct position with respect to a predetermined rotation direction (for example, the RH direction shown in FIG. 7) around the central axis CL of the syringe 201. It is an information receiving part which receives the information regarding the syringe 200 memorize | stored in RF tag TG in a state.

The memory of the RF tag TG shown in FIG. 7B stores, for example, an information group IF such as information on the amount of syringe contained, information on the type of chemical contained in the syringe, and information on the amount of liquid delivered. ing.
As shown in FIG. 7B, the RF receiving unit 610 receives the information group IF related to the syringe stored in the memory of the RF tag TG by wireless communication, for example, and controls the information group IF related to the syringe to the control unit. Send to 100.
Thereby, the control part 100 operates the syringe pump 1 according to the information group IF regarding this syringe. For this reason, for example, the syringe pump 1 is configured to accurately send the chemical solution in the syringe 200 to the patient. The position where the RF receiving unit 610 is disposed in the syringe pump 1 is a position where the information group IF related to the syringe of the RF tag TG can be received, for example, by wireless communication.

As shown in FIG. 7A, in a state before the main body flange 209 is gripped (set) by the main body flange gripping portion 500 at a correct position in the rotational direction RH, the first extension portion 209S and the second extension portion 209S The portion 209T is oriented in the Z direction (up and down direction).
On the other hand, as shown in FIGS. 7B and 8, the first extension is performed when the main body flange 209 is correctly held (set) by the main body flange holding portion 500 at the correct position in the rotational direction RH. The part 209S and the second extension part 209T are oriented in the Y direction (front-rear direction).
As shown in FIG. 7A, the main body flange 209 is rotated with respect to a rotation direction RH centered on the central axis CL direction (X direction). Then, as shown in FIGS. 7B and 8, in the state where the main body flange 209 is gripped at a correct position with respect to the rotation direction RH centered on the central axis CL direction (X direction), the first extension portion 209S is 6 is sandwiched between the right side surface portion 8V and the main body flange gripping portion 500 shown in FIG. The second extension portion 209T is located on the clamp 5 side.

The structure of the main body flange gripping portion 500 will be described in more detail with reference to FIGS. 9 to 12.
9 is a perspective view of the main body flange gripping portion 500, and FIG. 10 is an exploded perspective view of the main body flange gripping portion 500 shown in FIG. FIG. 11 is a perspective view showing a state in which the metal plate spring is arranged on the resin spring, and FIG. 12 is a perspective view seen from another angle showing a state in which the metal plate spring is fixed to the resin spring. FIG. 9 shows a state where the main body flange 209 is correctly set by the main body flange gripping portion 500 at a correct position in the rotational direction RH.

As shown in FIG. 10, the main body flange gripping portion 500 includes a main body 550, leg portions 560, and a single metal plate spring 570. The main body 550 and the leg portion 560 are molded products made of plastic.
The main body 550 includes the above-described distal end portion 501 and a base portion 555 formed continuously with the distal end portion 501. The distal end portion 501 preferably has two introduction portions 502 and 503 and a concave portion 504 formed between the introduction portions 502 and 503.
As shown in FIG. 10, the base 555 of the main body 550 has a recess 556 and a resin spring 557. The recess 556 is a region surrounded by one edge 556A, the other interior 556B, and the bottom surface 556C. One edge portion 556A is formed in a substantially W shape, and the other inner portion 556B is formed in a substantially semicircular shape.

As shown in FIG. 10, the resin spring 557 is integrally formed on the bottom surface 556C of the recess 556, and has one resin spring portion 557A, the other resin spring portion 557B, and a central portion 557C. One resin spring portion 557A and the other resin spring portion 557B are cantilever springs formed in opposite directions with the central portion 557C as a fixed portion.
As a result, the resin spring 557 is less likely to be damaged when the main body flange 209 is forcibly rotated when the main body flange 209 is correctly held by the main body flange holding portion 500 at the correct position in the rotational direction RH. It has become.
The metal leaf spring 570 shown in FIG. 10 is made of a metal material, such as SUS. The metal plate spring 570 includes one metal spring portion 570A, the other metal spring portion 570B, and a fixing portion 570C.

As shown in FIG. 11, the fixing portion 570 </ b> C of the metal plate spring 570 is fixed to the central portion 557 </ b> C of the resin spring 557. One metal spring portion 570A and the other metal spring portion 570B overlap with one resin spring portion 557A and the other resin spring portion 557B, respectively.
As a result, one metal spring portion 570A and one resin spring portion 557A function integrally as a laminated hybrid spring, and similarly, the other metal spring portion 570B and the other resin spring portion 557B are also laminated. It functions as an integral spring as a hybrid spring of the mold.

Next, the leg portion 560 shown in FIG. 10 includes a plastic molded product cover member 561 and leg portion main bodies 562 and 563. The leg main bodies 562 and 563 are formed in a substantially C shape as a whole, and are made of a metal plate material such as a SUS plate. The cover member 561 includes an intermediate portion 561A and leg covers 561B and 561C. The intermediate portion 561A is fitted into the concave portion 556 with the intermediate portion of the leg main bodies 562 and 563 and the metal leaf spring 570 interposed therebetween, so that the main body 550 and the leg portion 560 are integrated. As shown in FIGS. 10 and 9, the main body 550 and the leg portion 560 are fixed by two screws 550N with a metal plate spring 570 interposed therebetween.
Leg covers 561B and 561C shown in FIG. 10 cover the leg main bodies 562 and 563. Attachment portions 562A and 563A of the leg main bodies 562 and 563 are fixed to the fixed portion 1M side of the syringe pump 1 by screws 560N.

As shown in FIG. 10, when the main body 550 and the leg 560 are fixed with two screws 550N with the metal plate spring 570 interposed therebetween, as shown in FIG. It is located inside the resin spring 557 and inside the intermediate portion 561A of the cover member 561.

FIG. 13 is a view of the vicinity of the resin spring 557 and the metal plate spring 570 in FIG. 12 as viewed from the direction of the arrow J1.
As shown in FIGS. 12 and 13, a metal plate spring 570 is in close contact with the inside of the resin spring 557. The resin spring 557 has a first stopper portion 651 and a second stopper portion 652 at both ends. The first stopper portion 651 is formed to protrude in the X2 direction at the end portion of one resin spring portion 557A of the resin spring 557. The first stopper portion 651 is a rotation blocking portion that blocks the rotation of the main body flange 209 in one rotation direction.
Similarly, the second stopper portion 652 is formed to protrude in the X2 direction at the end of the other resin spring portion 557B of the resin spring 557. The second stopper portion 652 is a rotation blocking portion that blocks the rotation of the main body flange 209 in the other rotation direction. The protruding height H1 of the first stopper portion 651 and the second stopper portion 652 is larger than the protruding height H2 of the center portion 557C.
In addition, the first stopper portion 651 and the second stopper portion 652 are formed with tapered surfaces whose protruding heights gradually increase in the Y2 direction. Accordingly, the first stopper portion 651 and the second stopper portion 652 can guide the main body flange 209 to a correct position with respect to the rotation direction centered on the central axis CL direction (X direction).

As shown in FIG. 7A to FIG. 7B, when the medical staff rotates the main body flange 209 in the RH direction, the first extension portion 209S of the main body flange 209 becomes the second stopper portion shown in FIG. By pressing the taper surface of 652, the second stopper portion 652 is elastic in the X1 direction against the spring force of both the second stopper portion 652 and the other metal spring portion 570B of the metal leaf spring 570 shown in FIG. Deform and press.
Thereby, one edge part 209M and the other edge part 209N of the first extension part 209S of the main body flange 209 fit between the first stopper part 651 and the second stopper part 652, as shown in FIG. For this reason, the first stopper portion 651 and the second stopper portion 652 are arranged so that the first extension portion 209S does not rotate in either the RH direction or the RI direction shown in FIG. Regulate rotation. Therefore, the main body flange 209 can be maintained in a state of being gripped at a correct position with respect to the rotation direction RH centering on the central axis CL direction (X direction).

On the other hand, the same applies when the medical worker rotates the main body flange 209 in the RI direction in a state where the first extension portion 209S and the second extension portion 209T in FIG. The first extension portion 209S of the main body flange 209 presses the taper surface of the first stopper portion 651 shown in FIG. 12, whereby one metal spring portion 570A of the first stopper portion 651 and the metal leaf spring 570 shown in FIG. The first stopper 651 is elastically deformed against both spring forces and pushed in the X1 direction.
Thereby, one edge part 209M and the other edge part 209N of the first extension part 209S of the main body flange 209 are connected to the first stopper part 651 and the second stopper part 652 as shown in FIGS. Get stuck in between. For this reason, the first stopper portion 651 and the second stopper portion 652 are arranged so that the first extension portion 209S does not rotate in either the RH direction or the RI direction shown in FIG. Regulate rotation. Therefore, the main body flange 209 can be maintained in a state of being gripped at a correct position with respect to the rotation direction RH centering on the central axis CL direction (X direction).

Thus, as shown in FIGS. 8 and 9, when the first extension portion 209S of the main body flange 209 is positioned at the correct position PP with respect to the rotational direction centered on the central axis CL direction, the main body flange 209 is prevented from rotating in any of the RH direction and the RI direction by the first stopper portion 651 and the second stopper portion 652. That is, as shown in FIG. 9, when the first extension portion 209S of the main body flange 209 is positioned at the correct position, the first stopper portion 651 and the second stopper portion 652 become the first extension portion of the main body flange 209. It abuts against the edge portions 209N and 209M on both sides of 209S. For this reason, the first stopper portion 651 and the second stopper portion 652 prevent the main body flange 209 from rotating.

Thereby, since the main body flange 209 does not rotate from the correct position PP in the main body flange gripping portion 500, the positioning operation regarding the rotation direction of the main body flange 209 can be easily and reliably performed. Moreover, the syringe recognizing RF tag TG disposed in the first extension 209S can be correctly positioned at a predetermined correct position PP as shown in FIGS. Therefore, as shown in FIG. 8, the information group IF stored in the syringe recognition RF tag TG can be reliably received by the RF receiver 610 shown in FIG.

Moreover, in FIGS. 12 and 13, the metal metal plate spring 570 is covered with a resin spring 557. As a result, the resin main body flange 209 contacts the resin spring 557, but the resin main body flange 209 does not directly contact the metal plate spring 570. For this reason, it can prevent that the resin-made main body flange 209 touches the metal metal leaf | plate spring 570 directly, and is damaged.

Further, even if the resin spring 557 illustrated in FIG. 12 is a relatively complicated shape having the first stopper portion 651 and the second stopper portion 652, the resin spring 557 has a large degree of freedom in shape because it is a resin molded product. Can be made inexpensively.
However, since the resin spring 557 is a resin molded product, for example, if the resin main body flange 209 contacts the resin flange 209 for a long time or repeatedly in a high temperature environment, the resin spring 557 may be deformed (sagging) due to heat or the like. .

The metal plate spring 570 can exhibit stable spring performance and is excellent in durability. Since the resin spring 557 is supported from the back side by the metal metal plate spring 570, the property that the resin main body flange gripping portion 550 is easily deformed can be compensated, and the resin spring 557 and the metal plate spring 570 are hybrid. The structure can exhibit excellent spring properties.
Further, in FIGS. 12 and 13, the metal metal plate spring 570 is covered with a resin spring 557. For this reason, when attaching and detaching the main body flange 209, the metal metal leaf spring 570 does not come into contact with the plastic right side surface portion 8V of the syringe pump 1, so that the right side surface portion 8V is hardly damaged.

Next, the usage example of the syringe pump 1 of embodiment of this invention is demonstrated.
The medical staff selects, for example, the syringe 200 from the multiple types of syringes 200 and 300 shown in FIG. 3 and attaches the syringe 200 to the syringe pump 1 as shown in FIGS. 1 and 2. A medical worker houses the syringe body 201 in the syringe body holding part 8D of the housing part 8 and fixes the syringe 203 with the clamp 5 in a state where the tube 203 is fitted in the tube fixing part 9.
Thereby, the syringe main body 201 can be fixed in the syringe main body holding part 8D of the accommodating part 8. In addition, a part of the main body flange 209 is gripped by being sandwiched between the right side surface portion 8V and the main body flange gripping portion 500.

Here, the operation of gripping a part of the main body flange 209 between the right side surface portion 8V and the main body flange gripping portion 500 will be described in more detail.
As shown in FIGS. 7A to 7B, when the medical worker rotates the main body flange 209 with the rotation of the syringe in the RH direction, for example, the first extension portion 209S of the main body flange 209 is changed to FIG. The second stopper portion 652 is elastically deformed and pushed in the X1 direction against the spring force of both the second stopper portion 652 and the other metal spring portion 570B of the metal leaf spring 570 shown in FIG.

As a result, the first extension portion 209S of the main body flange 209 is fitted between the first stopper portion 651 and the second stopper portion 652, as shown in FIG. 652 prevents rotation of the main body flange 209 by preventing the first extension portion 209S from rotating in either the RH direction or the RI direction shown in FIG.

In this way, the rotation with respect to the main body flange gripping portion 500 is prevented, and the positioning of the main body flange 209 in the rotation direction can be easily and reliably performed. Moreover, as shown in FIGS. 8 and 9, the RF tag TG for syringe recognition arranged in the first extension 209 </ b> S can be positioned at a predetermined correct position PP. Therefore, the information IF stored in the syringe recognition RF tag TG can be reliably sent to the RF receiver 610 shown in FIGS. 7B and 8.

As shown in FIG. 5, the medical staff presses the syringe pusher pressing member 10 in the T (X2 direction) direction while pressing the operation lever 83 in the P1 direction with a finger, thereby pressing the syringe pusher. The holding mechanism portion 80 of the member 10 is brought close to the pusher flange 205 to hold the syringe pusher 202.

Thereafter, when the motor 133 of the syringe pusher drive unit 7 shown in FIG. 4 is driven by a command from the control unit 100, the syringe pusher pressing member 10 is moved in the T direction by the rotation of the feed screw 135. As a result, the syringe pusher pressing member 10 presses the syringe pusher 202 in the T direction so that the drug solution in the syringe main body 201 shown in FIG. Can be fed to

Next, another embodiment of the present invention will be described. The same reference numerals are given to the same portions as those of the first embodiment of the present invention, and the description thereof will be omitted.
Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIG.
The main body flange gripping portion 500A of the second embodiment shown in FIG. 14 is different from the main body flange gripping portion 500 of the first embodiment shown in FIGS. 9 and 10 in that the metal metal plate spring 570 is omitted. That is.
The above-described main body flange gripping portion 500 according to the first embodiment of the present invention has a hybrid structure composed of a resin and a metal member using a total of three members including a resin main body 550, a leg portion 560, and a metal metal leaf spring 570. Adopted.

On the other hand, the main body flange gripping portion 500A of the second embodiment of the present invention does not have a metal plate spring itself, but employs only the resin spring 557, thereby reducing the number of parts and making the structure simple. Can do. Moreover, the first stopper portion 651 and the second stopper portion 652 of the resin spring directly contact the main body flange 209 (309), and the metal spring does not hit the main body flange at all, so the main body flange 209 (309) is not damaged. It is hard to stick.
The first stopper portion 651 and the second stopper portion 652 of the rotation prevention portion provided on the resin spring 557 can prevent the main body flange from rotating in both directions, and the main body flange 209 (309) is always the main body flange gripping portion. Can be positioned at the correct rotational position. In addition, similarly to the case shown in FIG. 8, the RF tag TG for syringe recognition arranged in the first extension 209S can be positioned at a predetermined correct position PP. For this reason, the information stored in the RF tag TG for syringe recognition can be reliably transmitted to the RF receiver 610 shown in FIG.
Further, when the main body flange 209 is attached / detached, since there is no metal metal leaf spring, the plastic right side surface portion 8V of the syringe pump 1 is hardly damaged.

<Third Embodiment>
Next, a third embodiment of the present invention will be described with reference to FIG.
FIG. 15A is a perspective view showing the main body flange gripping portion 500B of the third embodiment, while FIG. 15B is a perspective view showing the metal metal plate spring 870 of the main body flange gripping portion 500B in particular. It is.
The main body flange gripping portion 500B shown in FIG. 15 is different from the main body flange gripping portion 500 of the first embodiment shown in FIGS. 9 and 10 in that there is a single metal plate spring 870 but a resin spring holder. Department is omitted.
The metal metal plate spring 870 includes a first metal spring portion 870A, a second metal spring portion 870B, a fixing portion 870C, and a first stopper portion 870D and a second stopper portion 870E.
The first stopper portion 870D and the second stopper portion 870E are formed with tapered surfaces whose protruding heights gradually increase in the Y2 direction.
The first metal spring portion 870A and the second metal spring portion 870B are formed in opposite directions with the fixing portion 870C as a fixing portion. As a result, the metal leaf spring 870 is damaged when the main body flange 209 is forced to rotate while the main body flange 209 is correctly gripped by the main body flange gripping portion 500 at the correct position PP in the rotational direction RH. It is difficult to do.

When the first extension portion 209S of the main body flange 209 shown in FIG. 9 is rotated, one metal spring portion 870A or the other metal spring portion 870B is pushed against the fixing portion 870C by the first extension portion 209S. Elastically deforms. The first stopper portion 870D and the second stopper portion 870E are arranged so that the main body flange 209 rotates when the first extension portion 209S of the main body flange 209 shown in FIG. 9 is positioned at a correct position PP in the rotation direction. To prevent.
Thus, the first stopper portion 870D and the second stopper portion 870E can prevent the main body flange 209 from rotating with respect to the main body flange gripping portion 500B, and can easily and reliably perform positioning in the rotation direction. it can. Moreover, as shown in FIG. 8, the syringe recognition RF tag TG disposed in the first extension 209S can be positioned at a predetermined correct position PP. For this reason, the information stored in the RF tag TG for syringe recognition can be reliably transmitted to the RF receiver 610 shown in FIG.

<Fourth embodiment>
Next, a fourth embodiment of the present invention will be described with reference to FIGS.
FIG. 16 is a perspective view showing a fourth embodiment of the present invention, and FIG. 17 is a side view showing the fourth embodiment of the present invention.
The body flange gripping part 500C of the fourth embodiment of the present invention has a first stopper part 911 and a second stopper part 912. The first stopper portion 911 and the second stopper portion 912 are made of metal and are tongue-like members. The first stopper portion 911 and the second stopper portion 912 are provided so as to protrude from openings 921 and 922 provided in the main body 550 and the leg portion 560, respectively.

Accordingly, when the first extension portion 209S of the main body flange 209 shown in FIG. 9 is rotated, the first stopper portion 911 or the second stopper portion 912 is elastically deformed by being pushed by the first extension portion 209S. The first stopper portion 911 and the second stopper portion 912 prevent the main body flange 209 from rotating when the first extension portion 209S of the main body flange 209 shown in FIG. 9 is positioned at the correct position.
Thereby, although it is a simple structure, it can prevent that the main body flange 209 rotates with respect to the main body flange holding part 500C, and can perform positioning regarding a rotation direction easily and reliably. Moreover, as shown in FIG. 8, the syringe recognition RF tag TG disposed in the first extension 209S can be positioned at a predetermined correct position PP. For this reason, the information stored in the RF tag TG for syringe recognition can be reliably transmitted to the RF receiver 610 shown in FIG.

As described above, the syringe pump 1 according to the embodiment of the present invention includes the placement unit 6 on which the syringe body 201 (301) of the syringe 200 (300) can be placed, and the body flange 209 ( 309) is detachably gripped by the main body flange gripping part 500 and the main body flange 209 (309) in the main body flange gripping part 500 and positioned at a predetermined rotational position centered on the axis of the syringe 200 (300). For example, an RF receiving unit 610 is provided as an information receiving unit that receives information about the syringe provided on the main body flange 209 (309).
The main body flange gripping section 500 is a rotation blocking section (blocking section that prevents the main body flange 209 (309) from rotating in a state where the main body flange 209 (309) is positioned and gripped at a predetermined rotational position. A first stopper portion 651 and a second stopper portion 652).

Thereby, the rotation prevention part of the main body flange gripping part 500 prevents the main body flange 209 (309) from rotating in a state where the main body flange 209 (309) is positioned and held at a predetermined rotational position. be able to.
For this reason, since the main body flange 209 (309) can always be positioned at a position in the correct rotation direction while being gripped by the main body flange gripping portion 500, information on the syringe provided on the main body flange 209 (309). Can be correctly recognized when the syringe 200 (300) is attached to the syringe pump 1. Therefore, the syringe pump 1 recognizes information such as the type of the chemical solution in the syringe 200 (300), and the syringe pump 1 can send the chemical solution.

The rotation preventing portion includes a first stopper portion 651 that prevents the main body flange from rotating, and a second stopper portion 652 that prevents the main body flange from rotating in the opposite direction.
As a result, the first stopper portion 651 and the second stopper portion 652 of the rotation prevention portion can prevent the main body flange 209 (309) from rotating in both directions, and the main body flange 209 (309) is always kept in the main body flange gripping portion. It can be positioned at the position in the correct rotational direction while being gripped by 500.

As shown in FIGS. 10 to 12, the main body flange gripping portion 500 includes a metal spring 570 and a resin spring 557 covering the metal spring 570, and one end of the resin spring 557 has a main body flange 209 ( 309) is provided with a first stopper portion 651 that prevents the main body flange 209 (309) from rotating by hitting the edge portion. Further, a second stopper portion 652 is provided at the other end of the resin spring 557 to prevent the main body flange 209 (309) from rotating in the opposite direction by hitting the opposite edge portion of the main body flange 209 (309). It has been.

Accordingly, the first stopper portion 651 and the second stopper portion 652 of the rotation prevention portion provided on the resin spring 557 can prevent the main body flange 209 (309) from rotating in both directions, and the main body flange 209 (309). Can always be positioned in the correct rotational direction while being gripped by the main body flange gripping portion 500.
Since the durable metal spring can support the resin spring, the first stopper portion and the second stopper portion of the resin spring can reliably prevent the main body franc from rotating in both directions. In addition, since the first stopper portion and the second stopper portion of the resin spring directly contact the main body flange 209 (309), and the metal spring does not hit the main body flange 209 (309), the main body flange 209 (309) is damaged. Hard to stick.

As shown in FIG. 14, the main body flange gripping part 500 has a resin spring 557. A first stopper portion 651 is provided at one end of the resin spring to prevent the main body flange 209 (309) from rotating by hitting the edge of the main body flange 209 (309). Further, a second stopper portion 652 is provided at the other end of the resin spring 557 to prevent the main body flange 209 (309) from rotating in the opposite direction by hitting the opposite edge portion of the main body flange 209 (309). It has been.
Thereby, the first stopper portion 651 and the second stopper portion 652 of the rotation prevention portion provided on the resin spring 557 can prevent the main body flange from rotating in both directions, and the main body flange 209 (309) is always the main body flange. Positioning in the correct rotational direction can be performed while being gripped by the flange gripping portion.
In addition, the first and second stopper portions of the resin spring directly contact the main body flange 209 (309), and the metal spring never hits the main body flange, so the main body flange 209 (309) is scratched. Hateful.

As shown in FIG. 15, the main body flange gripping part 500 has a metal spring 870. One end of the metal spring 870 is provided with a first stopper portion 870D that prevents the main body flange 209 (309) from rotating by hitting the edge portion of the main body flange 209 (309). Further, a second stopper portion 870E that prevents the main body flange 209 (309) from rotating in the opposite direction by hitting the opposite edge portion of the main body flange 209 (309) is provided at the other end of the metal spring. ing.
Accordingly, the first stopper portion 870D and the second stopper portion 870E of the rotation preventing portion provided on the metal spring can prevent the main body flange from rotating in both directions, and the main body flange It can always be positioned at the position in the correct rotational direction while being gripped by the main body flange gripping portion 500.

As shown in FIG. 16, the main body flange gripping portion 500C has one metal spring 911 and the other metal spring 912, and the one metal spring 911 hits the edge portion of the main body flange 209 (309), thereby 209 (309) is a first stopper portion that prevents the rotation. The other metal spring 912 is a second stopper portion that prevents the main body flange from rotating in the opposite direction by hitting the opposite edge portion of the main body flange 209 (309).
Thereby, although it is a simple structure, the metal 1st stopper part 911 and 2nd stopper part 912 can prevent that the main body flange 209 (309) rotates bidirectionally, and the main body flange 209 (309) Therefore, it can be positioned at a position in the correct rotational direction while being always gripped by the main body flange gripping portion 500.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims. A part of each configuration of the above embodiment can be omitted, or can be arbitrarily combined so as to be different from the above.
As the operation unit for rotating the gripping members 81 and 82 to move in the thrust direction, the operation lever 83 is used as a manual operation type power input unit. An automatic operation type power input unit may be employed.
Moreover, in the said embodiment, although the RF receiving part 610 is arrange | positioned in the vicinity of the main body flange holding part 500 of the syringe pump 1, not only this but in the vicinity of the accommodating part 8 which accommodates the syringe main body 201 (301). It may be arranged. In this case, it is preferable that the RF tag TG for syringe recognition is disposed in the vicinity of the portion accommodated in the accommodating portion 8 in the syringe 200 (300).

DESCRIPTION OF SYMBOLS 1 ... Syringe pump, 2 ... Housing | casing, 6 ... Mounting part, 200 (300) ... Syringe, 209 (309) ... Main body flange, 500 ... Main body flange holding part, 550: Main body of the main body flange gripping part, 557 ... Resin spring, 560 ... Leg part of the main body flange gripping part, 570 ... Metal plate spring, 651 ... First stopper part, 652. Second stopper unit, 100 ... control unit, 600 ... RFID, 610 ... RF receiving unit (example of information receiving unit), TG ... RF tag for syringe recognition

Claims (8)

A syringe pump that attaches a syringe and feeds a chemical solution in the syringe,
A placement section capable of placing the syringe body of the syringe; and
A body flange gripping part that detachably grips the body flange of the syringe body; and
Information for receiving information about the syringe provided in the syringe body in a state where the body flange is positioned and held at a position in a predetermined rotation direction centered on the syringe axis in the body flange gripping portion. A receiver,
The main body flange gripping portion includes a rotation prevention portion that prevents the main body flange from rotating in a state where the main body flange is positioned and gripped at a position in the predetermined rotation direction. . The rotation prevention unit is configured to prevent the main body flange from rotating in the first rotation direction, and the main body flange from rotating in the second rotation direction opposite to the first rotation direction. The syringe pump according to claim 1, further comprising a second stopper portion for blocking. The first stopper portion prevents the main body flange from rotating in the first rotation direction by hitting the first edge portion of the main body flange, and the second stopper portion is configured to prevent the first edge of the main body flange from rotating. 3. The syringe pump according to claim 2, wherein the main body flange is prevented from rotating in the second rotation direction by hitting the second edge portion opposite to the portion. The body flange gripping portion has a first leaf spring portion, a second leaf spring portion, and a center portion,
The first leaf spring portion and the second leaf spring portion are formed in opposite directions with the central portion as a fixed portion,
The first stopper portion is provided at an end of the first leaf spring portion,
The syringe pump according to claim 2 or 3, wherein the second stopper portion is provided at an end portion of the second leaf spring portion. The main body flange gripping portion has a metal spring and a resin spring covering the metal spring,
The first end portion of the resin spring is provided with the first stopper portion that prevents the main body flange from rotating in the first rotation direction by hitting a first edge portion of the main body flange, and the resin spring The second stopper portion prevents the main body flange from rotating in the second rotation direction by hitting the second edge portion of the main body flange opposite to the first edge portion. The syringe pump according to claim 2 provided. The body flange gripping portion has a resin spring,
The first end portion of the resin spring is provided with the first stopper portion that prevents the main body flange from rotating in the first rotation direction by hitting a first edge portion of the main body flange, and the resin spring The second stopper portion prevents the main body flange from rotating in the second rotation direction by hitting the second edge portion of the main body flange opposite to the first edge portion. The syringe pump according to claim 2 provided. The body flange gripping part has a metal spring,
The first end portion of the metal spring is provided with the first stopper portion that prevents the main body flange from rotating in the first rotation direction by hitting a first edge portion of the main body flange, and the metal spring The second stopper portion prevents the main body flange from rotating in the second rotation direction by hitting the second edge portion of the main body flange opposite to the first edge portion. The syringe pump according to claim 2 provided. The body flange gripping portion has a first metal spring and a second metal spring,
The first metal spring is the first stopper portion that prevents the main body flange from rotating in the first rotation direction by hitting the first edge portion of the main body flange, and the second metal spring is the first metal spring, 3. The syringe pump according to claim 2, which is the second stopper portion that prevents the main body flange from rotating in the second rotation direction by hitting a second edge portion opposite to the first edge portion of the main body flange. .

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