CN118266841B - Instrument channel connecting valve and endoscope - Google Patents

Abstract

The present invention provides an instrument channel connecting valve and an endoscope, which relates to the technical field of endoscopes, and solves the problem in the prior art that liquid splashing is easily caused by operating errors in the channel switch state. The instrument channel connecting valve of the present invention includes a connected main pipe and a side branch pipe, and the one-way valve is axially positioned in the main channel set in the main pipe. The outlet end of the one-way valve is provided with at least two elastic lips arranged in sequence along the circumferential direction, and the lips gradually gather toward the outlet of the main channel along the axial direction, and close to each other under the action of their own elasticity to form a slit to close the valve through hole, and the outlet of the secondary channel set in the side branch pipe points to the outer surface of part of the lip. The lip of the one-way valve of the present invention can directly bear the impact of the liquid sprayed from the secondary channel, so that the fluid can impact the outer surface of the lip to further strengthen the closing trend between the lips, ensure the sealing of the one-way valve, and avoid the occurrence of liquid splashing caused by the operator's operating errors in the channel switch state.

Description

An instrument channel connecting valve and endoscope

Technical Field

The invention relates to the technical field of endoscopes, in particular to an instrument channel connecting valve and an endoscope.

Background Art

Endoscopes are often used in the inspection and surgery of the digestive tract, respiratory tract, and urogenital system. Different application scenarios require different types of endoscopes, such as gastroscopes and colonoscopes for the digestive tract, bronchoscopes for the respiratory system, and cystoscopes for the urogenital system. In some cases, it is necessary to inject liquid into the natural cavity of the human body through the instrument channel of the endoscope to smoothly carry out inspections and surgeries. For example, injecting physiological saline into the natural cavity of the human body to expand the cavity and reduce wrinkles and folds to facilitate observation of the lesion site, such as injecting contrast agents into the natural cavity of the human body to clearly display the structure of the lesion site through an X-ray machine, and injecting drugs into the natural cavity of the human body for intraoperative treatment.

In the related art, it is necessary to inject liquid into the human body with the help of a connecting valve during surgery. The connecting valve currently used is a three-way structure, with an instrument insertion end that can be opened and closed and a liquid injection end (this end can also be used to introduce some auxiliary instruments in some scenarios). Exemplarily, the connecting valve in the related art is shown in Figure 14, including a connecting valve body 400 and a locking valve 300 arranged in the connecting valve body 400. The locking valve 300 is an elastic member that can be axially compressed, generally a silicone member. When the locking valve 300 is compressed, its aperture will be reduced accordingly, so as to close the instrument insertion end of the connecting valve body 400 or lock the instrument passing through. The instrument insertion end of the connecting valve body 400 is screwed with a valve cap 4, and the valve cap 4 is provided with a hollow shaft 41 extending into the connecting valve body 400, and the end of the hollow shaft 41 abuts against the locking valve 300. The hollow shaft 41 can be axially moved by rotating the valve cap 4, so as to adjust the force of squeezing the locking valve 300.

Before injecting fluid through the injection end, one end of the instrument insertion end needs to be closed to prevent the high-pressure fluid generated during injection from splashing out from the instrument insertion end or to prevent foreign matter from entering the natural cavity of the human body with the fluid. However, during the operation, operators often make mistakes and easily forget to close or forget the switch status of the instrument insertion end, which has a certain impact on the safety and smooth progress of the operation.

Summary of the invention

The purpose of the present invention is to design an instrument channel connecting valve and endoscope to solve the problem of liquid splashing due to operating errors in the channel switch state.

The present invention is achieved through the following technical solutions:

The present invention provides an instrument channel connecting valve, which comprises a main pipe, a side branch pipe and a one-way valve; a main channel is arranged in the main pipe; one end of the side branch pipe is connected to the middle section of the main pipe, and a side channel whose outlet is connected to the middle section of the main channel is arranged inside the side branch pipe; the one-way valve is axially positioned and installed in the main channel, and a valve through hole for passing an instrument coaxial with the main channel is arranged in the one-way valve, and at least two elastic lips arranged in sequence along the circumferential direction are arranged at the outlet end of the one-way valve, and the lips gradually gather toward the outlet of the main channel along the axial direction, and close to each other under the action of their own elasticity to form a slit to close the outlet of the valve through hole; wherein the outlet of the side channel points to the outer surface of part of the lip, so that the fluid sprayed out of the side channel can impact the outer surface of the lip pointed to by the outlet of the side channel to provide a pressure that increases the closing tendency of the impacted lip.

When the above-mentioned structure is adopted, the one-way valve arranged in the main channel in the main pipe is composed of lips that are closed in pairs to form a slit. The lips gradually gather toward the outlet of the main channel along the axial direction to form an end structure with a pointed outlet end. On this basis, when the secondary channel in the side branch pipe is directed to the outer surface of part of the lips, when liquid is injected through the side branch pipe, the fluid will impact the outer surface of the lips, exerting a certain lateral pressure on the impacted lips, prompting the lips to have a further strengthening closing trend, which can ensure the good closing effect of the one-way valve under various conditions. It can effectively prevent the high-pressure fluid in the pipe from splashing out from the entrance of the main channel without the operator manually opening and closing the main channel, avoiding the problem of liquid splashing caused by the operator's error in operating the channel switch state.

In order to better realize the present invention, the following configuration is particularly adopted: at least part of the lip invades into the intersecting axial section of the main channel intersecting with the secondary channel along the axial direction of the main channel.

When the above-mentioned setting structure is adopted, at least part of the lip is set to a deeper position in the main channel, so that it is located in the intersecting axial section of the main channel intersecting with the secondary channel. In this way, the outlet of the secondary channel in the side branch tube can guide the liquid to impact the outer surface of the lip without being biased towards the inlet of the main channel. This will ensure that the liquid injected through the secondary channel can flow smoothly to the outlet of the main channel.

In order to better implement the present invention, the following configuration is particularly adopted: the extension paths of all the slits pass through the axis of the main channel.

In order to better realize the present invention, the following setting structure is particularly adopted: two lips are provided, and the slit formed between the two lips is arranged adjacent to the hole wall of the main channel away from the secondary channel, wherein the outlet of the secondary channel points to the outer surface of one of the lips.

When the above-mentioned structure is adopted, the slit of the one-way valve is formed at a position far away from the outlet of the secondary channel, and the outlet of the secondary channel points to the outer surface of one of the lips forming the slit, so that there is a larger passing space between the outlet of the secondary channel and the one-way valve that does not pass through the instrument, and the liquid sprayed from the secondary channel can also impact the outer surface of the lip more and then flow to the outlet of the main channel, ensuring that the one-way valve has better sealing when the liquid is injected.

In order to further better realize the present invention, the following setting structure is particularly adopted: the outer surface of the lip pointed to by the outlet of the secondary channel includes a slope located in front of the outlet of the secondary channel, and the end of the slope close to the secondary channel is farther away from the outlet of the main channel than the end far away from the secondary channel, so that the slope can guide the fluid impacting thereon to flow toward the outlet of the main channel.

When the above-mentioned structure is adopted, the inclined surface of the lip pointed by the secondary channel generally faces the position between the main pipe and the side branch pipe, which can provide a better guiding effect for the flowing liquid impacting thereon, allowing the liquid to flow smoothly toward the outlet of the main channel.

In order to better realize the present invention, the following setting structure is particularly adopted: the outer surface of the lip pointed to by the outlet of the secondary channel also includes an inner arc surface extending circumferentially around the axis of the main channel and located in front of the outlet of the secondary channel, and the edge of one end of the inner arc surface away from the outlet of the main channel is connected to the edge of one end of the inclined surface close to the outlet of the main channel.

When the above-mentioned structure is adopted, the outer surface of the lip pointed to by the secondary channel is composed of connected inclined surfaces and inner arc surfaces, so that the lip has a better convergence effect on the liquid and can be subjected to lateral pressure applied to its outer surface by the fluid from multiple directions to ensure sealing.

To further better implement the present invention, the following configuration is particularly adopted: the slit extends circumferentially around the axis of the main channel.

When the above-mentioned configuration is adopted, the axial direction of the slit is consistent with the inner arc surface of the outer surface of the lip pointed by the secondary channel, which can ensure that the lip of the one-way valve has a larger opening.

To further implement the present invention, the following configuration is particularly adopted: the one-way valve further comprises a barrel connected to an end of the lip away from the outlet of the main channel, and a flange is provided at an end of the barrel close to the inlet of the main channel;

The main channel is provided with a first step surface axially abutting against one end of the flange portion close to the outlet of the main channel;

The instrument channel connection valve further comprises a valve cap, which is screwed to the inlet end of the main pipe and has one end extending into the main channel and abutting against one end of the flange portion close to the inlet of the main channel;

The valve cap can move relative to the main pipe and penetrate into the main channel to axially squeeze the flange portion, thereby causing the valve through hole to reduce in diameter in the section located at the flange portion.

When the above-mentioned setting structure is adopted, the flange portion arranged on the one-way valve near the entrance of the main channel can provide the function of a locking valve, so that after the one-way valve passes through the instrument, the flange portion can be squeezed by the locking valve cap, so that the main channel section at the flange portion can lock the instrument by reducing the diameter.

In order to further better realize the present invention, the following configuration structure is particularly adopted: a two-way valve for controlling the on-off of the secondary channel is arranged at the side branch pipe.

When the above-mentioned configuration is adopted, the on-off of the side branch pipe can be manually controlled by the two-way valve.

In order to better realize the present invention, the following setting structure is particularly adopted: the aperture of the valve through hole is equal to the aperture of the main channel, and the main channel is provided with an annular second step surface axially abutting against one end of the lip close to the main channel outlet.

In order to better realize the present invention, the following configuration is particularly adopted: the slit is flush with the hole wall of the main channel.

In order to further better realize the present invention, the following configuration structure is particularly adopted: the angle between the side branch pipe and the main pipe is 30-90°.

In order to further better implement the present invention, the following configuration structure is particularly adopted: compared with the outlet of the main channel, the side branch pipe is closer to the inlet of the main channel.

The present invention also provides an endoscope, which includes a handle, an instrument nozzle and the above-mentioned instrument channel connecting valve, wherein the outlet end of the main pipe of the instrument channel connecting valve is connected to the instrument insertion port of the instrument nozzle, and the instrument nozzle is installed on the handle.

The present invention has the following advantages and beneficial effects:

In the present invention, the one-way valve arranged in the main channel of the instrument channel connecting valve in its main pipe is composed of lips closed in pairs to form a slit, and the lips gradually gather toward the outlet of the main channel along the axial direction to form an end structure with a pointed outlet end. On this basis, when the secondary channel in the side branch pipe is directed to the outer surface of part of the lips, when liquid is injected through the side branch pipe, the fluid will impact the outer surface of the lips, exerting a certain lateral pressure on the impacted lips, prompting the lips to have a further strengthening of the closing trend, which can ensure the good closing effect of the one-way valve under various conditions. It can effectively prevent the high-pressure fluid in the pipe from splashing out from the entrance of the main channel without the operator manually opening and closing the main channel, and avoid the problem of liquid splashing caused by the operator's error in operating the channel switch state.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the three-dimensional structure of an instrument channel connection valve;

FIG2 is a schematic top view of an instrument channel connection valve;

FIG3 shows a longitudinal section structure of the instrument channel connecting valve in the direction A-A in FIG2 ;

FIG4 shows the internal layout structure of the instrument channel connection valve shown in FIG3;

FIG5 is a schematic diagram of the three-dimensional structure of the one-way valve shown in FIG4;

FIG6 shows another longitudinal section structure of the instrument channel connecting valve in the direction A-A in FIG2 ;

FIG7 is an enlarged view of a portion C in FIG6 ;

FIG8 shows the internal layout structure of the instrument channel connecting valve shown in FIG6;

FIG9 is a schematic diagram of the three-dimensional structure of the one-way valve shown in FIG8;

FIG10 is a schematic side view of the one-way valve in FIG9 ;

Fig. 11 is a cross-sectional view along the line B-B in Fig. 2;

FIG12 shows a perspective structure of a valve body of an instrument channel connecting valve;

FIG13 shows an endoscope structure equipped with an instrument channel connection valve;

FIG. 14 is a schematic diagram of the longitudinal cross-sectional structure of an existing connecting valve.

The markings in the figure are:

100. Instrument channel connection valve;

1. Main pipe; 11. Main channel; 111. First step surface; 112. Second step surface; D. Intersecting axial section;

2. Side branch; 21. Secondary channel;

3. One-way valve; 31. Valve through hole; 32. Lip; 321. Inclined surface; 322. Inner arc surface; 33. Tip; 34. Slit; 35. Body; 36. Flange;

4. Valve bonnet; 41. Hollow shaft;

5. Two-way valve;

200. Endoscope;

6. Handle;

7. Instrument mouth;

8. Instrument tube;

300, locking valve;

400. Connect the valve body.

DETAILED DESCRIPTION

To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

On the one hand, the present application provides an instrument channel connection valve 100, as shown in FIGS. 1 to 12, which is particularly configured to have the following structure:

In this embodiment, the instrument channel connecting valve 100 includes a valve body and a one-way valve 3 . The valve body is a three-way pipe fitting, which is composed of a connected main pipe 1 and a side branch pipe 2 .

Specifically, as shown in FIG. 1 and FIG. 3 , a main channel 11 is provided in the main tube 1, and an inlet and an outlet of the main channel 11 are respectively formed at an inlet end (also referred to as an instrument insertion end of the main tube 1) and an outlet end (also referred to as an instrument lead-out end of the main tube 1) of the main tube 1. A connector is provided at the outlet end of the main tube 1 for connecting with an instrument nozzle 7 or other connection structure provided on the endoscope 200, so that the main channel 11 is connected to an instrument tube 8 provided on the endoscope 200.

As shown in Figures 1 and 3, a secondary channel 21 is provided in the side branch tube 2, and the inlet and outlet of the secondary channel 21 are respectively formed at the injection end and the discharge end of the side branch tube 2. The discharge end of the side branch tube 2 is fixedly connected to the middle section of the main tube 1, and the secondary channel 21 is laterally connected to the middle section of the main channel 11 through the outlet. The secondary channel 21 is mainly used for injection, and in some cases, some auxiliary instruments, such as guide wires and catheters, can also be passed through.

The one-way valve 3 has a one-way conduction capability, and is axially positioned and installed in the main channel 11, so that the instrument entering through the inlet end of the main pipe 1 can open the one-way valve 3, and then pass through the one-way valve 3 to move to the outlet end of the main pipe 1. As shown in FIG3 , a valve through hole 31 is provided in the one-way valve 3, and the valve through hole 31 is mainly used for passing instruments, and its inlet and outlet are respectively formed at one end of the one-way valve 3 close to the inlet of the main channel 11 and one end close to the outlet of the main channel 11. The valve through hole 31 is coaxially arranged with the main channel 11, so that the instrument passing through the one-way valve 3 can be centered.

As shown in Figures 3, 5, 6 and 9, the outlet end of the one-way valve 3 is provided with at least two elastic lips 32 arranged in sequence along the circumferential direction, and the lips 32 are generally made of silicone. The lips 32 gradually gather toward the outlet of the main channel 11 along the axial direction, so that the outlet end of the one-way valve 3 forms a tip 33, and the size of the valve through hole 31 gradually decreases along the tip 33 until the lips 32 contact each other. Under the action of their own elasticity, the lips 32 contact and close to form a slit 34, which closes the outlet of the valve through hole 31 and prevents it from communicating with the inlet of the valve through hole 31.

In some embodiments, the tip portion 33 is composed of two lips 32, and the two lips 32 are in contact with each other to form a slit 34. The slit 34 can be arranged in the center or to one side. The slit 34 can be a straight line, an arc line, or a wavy line that twists and turns.

In some embodiments, the tip portion 33 is composed of three lips 32, and the three lips 32 are in contact with each other to form three slits 34 relative to a point. The intersection of the slits 34 can be located at the axis of the one-way valve 3, that is, the extension paths of all the slits 34 pass through the axis of the main channel 11, and of course, they can also be arranged to one side of the axis.

In some embodiments, the tip portion 33 is composed of four lips 32 as shown in FIG5 , and the four lips 32 are in contact with each other to form four slits 34 relative to a point. The intersection of the slits 34 can be located at the axis of the one-way valve 3 as shown in FIG5 , or can be arranged to one side of the axis.

Of course, the tip portion 33 may also be composed of more lips 32 arranged in sequence along the circumferential direction.

As shown in Fig. 3, Fig. 4, Fig. 6 and Fig. 8, the outlet of the secondary channel 21 provided in the side branch 2 points to the outer surface of the part of the lip 32 at the tip 33. When liquid is injected through the secondary channel 21, the liquid flows along the secondary channel 21 to the outlet, forming a continuous fluid. After the fluid is ejected from the outlet of the secondary channel 21, it can directly impact the outer surface of the lip 32 pointed by the outlet of the secondary channel 21. The continuous fluid hits the outer surface of the lip 32, exerting a certain lateral pressure on the lip 32. When the lip 32 is impacted by the fluid, its closing tendency is strengthened, making it more difficult for the lip 32 to open in the reverse direction.

In this embodiment, the one-way valve 3 provided in the main channel 11 of the instrument channel connecting valve 100 is composed of lips 32 that are closed in pairs to form a slit 34. The lips 32 gradually gather toward the outlet of the main channel 11 along the axial direction to form an end structure with a tip 33 at the outlet end. On this basis, when the secondary channel 21 in the side branch tube 2 is directed to the outer surface of part of the lips 32, when liquid is injected through the side branch tube 2, the fluid will impact the outer surface of the lips 32, exerting a certain lateral pressure on the impacted lips 32, prompting the lips 32 to have a further strengthened closing trend, which can ensure the good closing effect of the one-way valve 3 in various situations. For example, when the instrument does not pass through the one-way valve 3, during the process of injecting liquid through the side branch tube 2, the lateral pressure will make the lips 32 contact more closely, so that the slit 34 is closed more tightly, and the high pressure generated in the main tube 1 will make it difficult to reversely open the one-way valve 3. When the instrument passes through the one-way valve 3, during the process of injecting liquid through the side branch pipe 2, the lateral pressure will make the lip 32 fit more closely on the instrument, making it difficult for the liquid in the main pipe 1 to reversely pass through the one-way valve 3. In this way, the high-pressure fluid in the pipe can be effectively prevented from splashing out from the inlet of the main channel 11 without the operator manually opening and closing the main channel 11, thereby avoiding the problem of liquid splashing caused by the operator's error in operating the channel switch state. In actual use, you don't need to pay too much attention to the switch state of the inlet end of the main pipe 1, and you don't need to open and close the inlet end of the main pipe according to whether to inject liquid.

According to some optional embodiments, the main pipe 1 and the side branch pipe 2 are integrally injection-molded components, and the material thereof may be transparent polycarbonate or other transparent or opaque polymer materials.

According to some optional embodiments, the tip portion 33 of the one-way valve 3 may be fixed to the hole wall of the main channel 11 by glue.

According to some optional embodiments, the angle between the main pipe 1 and the side branch pipe 2 is 30-90°. Specifically, it can be 30°, 45°, 60°, 90°, or other angles. In the instrument channel connection valve 100 shown in FIG1 , the angle between the main pipe 1 and the side branch pipe 2 is 90°. If the angle between the main pipe 1 and the side branch pipe 2 is less than 90°, it is best to make the outlet of the secondary channel 21 closer to the outlet of the main channel 11 than its inlet, so that the main pipe 1 and the side branch pipe 2 form a valve body structure similar to a medical Y valve, so that the injection end of the side branch pipe 2 can be closer to the inlet end of the main pipe 1, which is in line with operating habits.

According to some optional embodiments, the entire one-way valve 3 is located at a side of the side branch pipe 2 near the entrance of the main channel 11. In this way, if the lip 32 of the tip 33 of the one-way valve 3 is to be directly impacted by the liquid sprayed from the secondary channel 21, the liquid injection end of the side branch pipe 2 needs to be tilted toward the outlet end of the main channel 1, so that the outlet of the secondary channel 21 points toward the entrance of the main channel 11, and part of the outer surface of the lip 32 is exposed on the path in front of the outlet of the secondary channel 21.

According to some optional embodiments, as shown in Fig. 3, Fig. 6 and Fig. 7, the tip portion 33 of the one-way valve 3 partially intrudes into the intersecting axial section D in the main channel 11 intersecting with the secondary channel 21 along the axial direction of the main channel 11. The intersecting axial section D is the section between the two dotted lines in Fig. 7, that is, the section of the cross section of the main channel 11 from the end of the secondary channel 21 outlet close to the entrance of the main channel 11 to the end close to the outlet of the main channel 11.

The tip portion 33 may completely penetrate into the intersecting axial section D as shown in FIG. 7 , or may partially penetrate into the intersecting axial section D as shown in FIG. 3 .

When the tip 33 of the one-way valve 3 at least partially intrudes into the intersecting axial section D, at least part of the lip 32 intrudes into the intersecting axial section D. In this case, when the angle between the main pipe 1 and the side branch pipe 2 is 90°, the outer surface of the lip 32 can also be exposed on the front path of the outlet of the secondary channel 21. When the angle between the main pipe 1 and the side branch pipe 2 is less than 90°, the injection end of the side branch pipe 2 does not need to be tilted toward the outlet end of the main pipe 1, but can be tilted toward the inlet end of the main pipe 1, so that the outlet of the secondary channel 21 is closer to the outlet of the main channel 11 than its inlet, and the injection end of the side branch pipe 2 is tilted toward the inlet end of the main pipe 1, which is more in line with human operating habits.

In this embodiment, at least a portion of the lip 32 of the one-way valve 3 is arranged at a deeper position in the main channel 11, so that the lip 32 is located in the intersecting axial section D in the main channel 11 intersecting with the secondary channel 21. In this way, the outlet of the secondary channel 21 in the side branch pipe 2 can guide the liquid to impact the outer surface of the lip 32 without being biased toward the inlet of the main channel 11, so that it can be ensured that the liquid injected through the secondary channel 21 can flow smoothly to the outlet of the main channel 11.

According to some optional embodiments, the tip portion 33 of the one-way valve 3 is composed of two lips 32, the outlet of the secondary channel 21 points to the outer surface of one of the lips 32, and a slit 34 formed between the two lips 32 is eccentrically arranged. Specifically, the slit 34 is arranged adjacent to the hole wall of the main channel 11 away from the secondary channel 21.

In this embodiment, the slit 34 of the one-way valve 3 is formed at a position far away from the outlet of the secondary channel 21, and the outlet of the secondary channel 21 points to the outer surface of one of the lips 32 forming the slit 34, so that there is a large passing space between the outlet of the secondary channel 21 and the one-way valve 3 that does not pass through the instrument, and the liquid sprayed from the secondary channel 21 can impact more on the outer surface of the lip 32 and then flow to the outlet of the main channel 11, ensuring that the one-way valve 3 has better sealing when the liquid is injected.

According to some optional embodiments, as shown in FIG9 and FIG10, the outer surface of one of the lips 32 of the tip portion 33 of the one-way valve 3, which is composed of two lips 32, includes a slope 321 extending obliquely along the axial direction of the valve through hole 31. As shown in FIG6-FIG8, the tip portion 33 of the one-way valve 3 intrudes into the intersecting axial region D, so that the slope 321 is exposed in front of the outlet of the secondary channel 21, and the outlet of the secondary channel 21 provided in the side branch pipe 2 points to the slope 321 of the lip 32 provided with the slope 321 on the one-way valve 3. The end of the slope 321 close to the secondary channel 21 is arranged farther away from the outlet of the main channel 11 than the end away from the secondary channel 21, so that the slope 321 can guide the fluid impacting thereon to flow toward the outlet of the main channel 11.

In this embodiment, the inclined surface 321 of the lip 32 pointed to by the secondary channel 21 is roughly facing the position between the main pipe 1 and the side branch pipe 2. As shown in Figure 11, the inclined surface 321 can provide a better guiding effect for the flowing liquid impacting thereon, so that the liquid can flow smoothly toward the outlet of the main channel 11.

Preferably, as shown in Figures 7 and 9, the outer surface of the lip 32 indicated by the outlet of the secondary channel 21 further includes an inner arc surface 322 extending circumferentially around the axis of the main channel 11. The inner arc surface 322 has an inner arc feature relative to the main channel 11. As can be seen from Figure 8, the side branch pipe 2 is located at the upper part of the main pipe 1, and the inner arc surface of the lip 32 is curved and concave downward.

The inner arc surface 322 on the lip 32 is located in front of the outlet of the secondary channel 21. At the same time, the inner arc surface 322 is arranged closer to the outlet of the main channel 11 than the inclined surface 321. The edge of the inner arc surface 322 away from the outlet of the main channel 11 is connected to the edge of the inclined surface 321 close to the outlet of the main channel 11, with a smooth transition.

In this preferred embodiment, the outer surface of the lip 32 pointed to by the secondary channel 21 is composed of a connected inclined surface 321 and an inner arc surface 322, so that the lip 32 has a better convergence effect on the liquid and can be subjected to lateral pressure applied to its outer surface by the fluid from multiple directions to ensure sealing.

Preferably, the two lips 32 are arranged at the outlet end to extend circumferentially around the axis of the one-way valve 3 , so that the two lips 32 overlap up and down at the outlet end of the one-way valve 3 to form an arc-shaped slit 34 extending circumferentially around the axis of the main channel 11 .

In this preferred embodiment, the axial direction of the slit 34 is consistent with the inner arc surface 322 of the outer surface of the lip 32 pointed by the secondary channel 21, which can ensure that the lip 32 of the one-way valve 3 has a larger opening.

According to some optional embodiments, as shown in Fig. 5 and Fig. 9, the one-way valve 3 further comprises a barrel 35, and the cylindrical barrel 35 is connected to the root of the lip 32, that is, the end of the lip 32 away from the outlet of the main channel 11. The barrel 35 is configured as an end flange member, and a flange portion 36 is provided at one end thereof close to the inlet of the main channel 11.

As shown in Fig. 3, Fig. 6 and Fig. 12, the main channel 11 is provided as a stepped hole, and a first step surface 111 facing the inlet is provided in a section near the inlet, and one end of the flange portion 36 near the outlet of the main channel 11 axially abuts against the first step surface 111. The instrument channel connection valve 100 is provided with a joint at the inlet end of the main pipe 1 and a valve cap 4 is screwed through the joint, and one end of the valve cap 4 axially abuts against one end of the flange portion 36 near the inlet of the main channel 11, so that the barrel 35 can be positioned in the main channel 11.

The valve cap 4 is provided with a hollow shaft 41 coaxially extending into the main channel 11. The aperture of the hollow shaft 41 is roughly equal to the aperture of the valve through hole 31, which is used for smooth passage of instruments. The end of the hollow shaft 41 axially abuts against one end of the flange portion 36 close to the entrance of the main channel 11. The valve cap 4 is screwed to the entrance end of the main pipe 1, and the depth of the hollow shaft 41 can be adjusted by rotating relative to the main pipe 1, thereby adjusting the degree of axial compression of the flange portion 36. The flange portion 36 is an elastic member that can be axially compressed. The flange portion 36 is also a pipe fitting. When axially compressed, the outer peripheral wall of the flange portion 36 is coaxially in close contact with the hole wall of the main channel 11, and the section of the main channel 11 located at the flange portion 36 will shrink in diameter.

By screwing the valve cap 4 in and out relative to the main pipe 1 , the aperture size of the flange portion 36 can be controlled, thereby achieving the function of locking the valve 300 .

The lip 32 and the barrel 35 are preferably formed in one piece, so that when the valve cap 4 and the first step surface 111 cooperate to position the flange 36, the one-way valve 3 as a whole can be positioned in the main channel 11. Of course, it can also be a split part that is axially abutted together. In this case, the end of the lip 32 close to the outlet of the main channel 11 and the end close to the entrance of the main channel 11 are axially abutted on the second step surface 112 and the barrel 35 respectively. As shown in Figures 7 and 12, the main channel 11 is provided with a second step surface 112 that is closer to the outlet of the main channel 11 than the first step surface 111, and the head of the tip 33 of the one-way valve 3 is axially abutted on the second step surface 112.

In this embodiment, the flange portion 36 arranged on the one-way valve 3 near the entrance of the main channel 11 can provide the function of a locking valve, so that after the one-way valve 3 passes through the instrument, the flange portion 36 can be squeezed by the locking valve cap 4, so that the section of the main channel 11 at the flange portion 36 can lock the instrument by reducing the diameter.

According to some optional embodiments, as shown in FIG3 and FIG7 , the aperture of the valve through hole 31 provided in the one-way valve 3 is equal to the aperture of the main channel 11. At this time, to install the one-way valve 3 in the main channel 11 of the main pipe 1, the main channel 11 needs to provide a mounting portion with a larger aperture in its section. Therefore, an annular second step surface 112 facing the entrance of the main channel 11 is provided in the main channel 11, and the head of the lip 32 of the tip 33 of the one-way valve 3 is axially abutted on the second step surface 112. After the one-way valve 3 is installed in place, the wall thickness of the barrel 35 is just equal to the relatively increased aperture size of the installation portion, so that the hole wall of the valve through hole 31 is flush with the hole wall of the main channel 11.

According to some optional embodiments, as shown in FIG. 7 , after the one-way valve 3 is installed in place in the main channel 11 , the slit 34 is flush with the hole wall of the main channel 11 and extends an arc segment along the circumference of the main channel 11 .

According to some optional embodiments, a two-way valve 5 for controlling the opening and closing of the secondary channel 21 is provided at the side branch pipe 2 .

In this embodiment, the opening and closing of the side branch pipe 2 can be manually controlled by the two-way valve 5 .

According to some optional embodiments, a connector is provided at the end of the side branch pipe 2, wherein the connector may be a hose connector, a Luer connector, an ordinary threaded connector, or the like.

According to some optional embodiments, as shown in FIGS. 1 and 2 , the side branch pipe 2 is arranged between the inlet end and the outlet end of the main pipe 1. Compared with the outlet of the main channel 11, the side branch pipe 2 is arranged closer to the inlet of the main channel 11. This can reduce the length of the one-way valve 3 or the length of the hollow shaft 41 of the valve cap 4, and can also facilitate the installation of the one-way valve 3.

On the other hand, the present application provides an endoscope, as shown in FIGS. 1 to 13 , which particularly adopts the following configuration structure:

In this embodiment, as shown in FIG. 13 , the endoscope 200 includes a handle 6 for holding, an instrument mouth 7 mounted on the handle 6 , and an instrument channel connecting valve 100 in any of the above embodiments.

FIG. 13 shows a half shell of the handle 6 , showing some structures inside the handle 6 .

The outlet end of the main tube 1 of the instrument channel connecting valve 100 is adapted and connected to the instrument insertion port of the instrument nozzle 7, and the instrument nozzle 7 is fixedly mounted on the handle 6. The instrument nozzle 7 is also connected to the suction tube and the instrument tube 8 through a three-way connection, so that the main channel 11 provided in the main tube 1 of the instrument channel connecting valve 100 is connected to the instrument tube 8 through the instrument nozzle 7.

On the other hand, the present application provides a sheath tube, particularly adopting the following configuration structure:

The sheath tube includes a sheath tube seat at the proximal end and a tube sheath at the distal end, and the proximal end of the tube sheath is fixedly connected to the sheath tube seat. The sheath tube seat is provided with an insertion channel axially connected to the tube sheath, and the tube sheath seat is also provided with an injection channel laterally connected to the insertion channel. The instrument channel connecting valve 100 in any of the above embodiments is attached to the injection channel, and specifically, the outlet end of the main tube 1 of the instrument channel connecting valve 100 is adapted and connected to the injection channel.

For example, the basic structure of the sheath tube can refer to the medical sheath tube structure in CN209899329U. The main tube 1 of the instrument channel connecting valve 100 is connected to the injection channel.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims (10)

1. An instrument channel connection valve, characterized in that: comprising the following steps:

a main pipe (1) in which a main channel (11) is provided;

A side branch pipe (2), one end of which is connected with the middle section of the main pipe (1), wherein a secondary channel (21) with an outlet communicated with the middle section of the main channel (11) is arranged in the side branch pipe (2);

The check valve (3) is axially positioned and installed in the main channel (11), a valve through hole (31) coaxial with the main channel (11) and used for passing through an instrument is arranged in the check valve (3), at least two elastic lips (32) which are arranged along the circumferential Xiang Yi sequence are arranged at the outlet end of the check valve (3), the lips (32) are gradually gathered along the axial direction towards the outlet of the main channel (11), and a slit (34) is formed by closing every two under the self elastic action so as to close the outlet of the valve through hole (31);

wherein the outlet of the secondary channel (21) is directed towards a portion of the outer side surface of the flap (32) such that fluid ejected from the secondary channel (21) can impinge on the outer side surface of the flap (32) directed at the outlet of the secondary channel (21) to provide a pressure that increases the tendency of the impacted flap (32) to close.

2. An instrument channel connection valve according to claim 1, wherein: at least part of the lip (32) penetrates axially along the main channel (11) into an intersecting axial section (D) of the main channel (11) intersecting the secondary channel (21).

3. An instrument channel connection valve according to claim 1, wherein: all the extending paths of the slits (34) pass through the axle center of the main channel (11).

4. An instrument channel connection valve according to claim 1, wherein: the number of the lips (32) is two, one slit (34) formed between the two lips (32) is arranged adjacent to the hole wall of the main channel (11) at a position far away from the auxiliary channel (21), wherein the outlet of the auxiliary channel (21) points to the outer side surface of one of the lips (32).

5. An instrument channel connection valve according to claim 4 wherein: the outer side surface of the lip (32) indicated by the outlet of the secondary channel (21) comprises a section of inclined surface (321) positioned in front of the outlet of the secondary channel (21), and one end of the inclined surface (321) close to the secondary channel (21) is further away from the outlet of the main channel (11) than the end far away from the secondary channel (21) so that the inclined surface (321) can guide fluid impinging on the inclined surface to flow towards the outlet of the main channel (11).

6. An instrument channel connection valve according to claim 5 wherein: the outer side surface of the lip flap (32) pointed by the outlet of the auxiliary channel (21) further comprises an intrados (322) which is positioned in front of the outlet of the auxiliary channel (21) and circumferentially extends around the axis of the main channel (11), and one end edge of the intrados (322) far away from the outlet of the main channel (11) is connected with one end edge of the inclined surface (321) close to the outlet of the main channel (11).

7. An instrument channel connection valve according to claim 6 wherein: the slit (34) extends circumferentially around the axis of the main passage (11).

8. An instrument channel connection valve according to claim 2, wherein: the one-way valve (3) further comprises a cylinder body (35) connected with one end of the lip flap (32) far away from the outlet of the main channel (11), and a flange part (36) is arranged at one end of the cylinder body (35) close to the inlet of the main channel (11);

The main passage (11) is provided with a first step surface (111) axially abutting against one end of the flange portion (36) near the outlet of the main passage (11);

the instrument channel connection valve (100) further comprises a valve cap (4), wherein the valve cap (4) is in threaded connection with the inlet end of the main pipe (1) and one end of the valve cap extends into the main channel (11) to be abutted with one end of the flange part (36) close to the inlet of the main channel (11);

wherein the valve cap (4) can move deep into the main channel (11) relative to the main pipe (1) to axially press the flange part (36) so as to drive the section of the valve through hole (31) positioned at the flange part (36) to shrink.

9. An instrument channel connection valve according to claim 1, wherein: a two-way valve (5) for controlling the on-off of the auxiliary channel (21) is arranged at the side branch pipe (2);

And/or the number of the groups of groups,

The aperture of the valve through hole (31) is equal to the aperture of the main channel (11), and the main channel (11) is provided with an annular second step surface (112) which is axially abutted with one end of the lip flap (32) close to the outlet of the main channel (11);

And/or the number of the groups of groups,

The included angle between the side branch pipe (2) and the main pipe (1) is 30-90 degrees;

And/or the number of the groups of groups,

-Said side branch (2) is closer to the inlet of said main channel (11) than to the outlet of said main channel (11);

And/or the number of the groups of groups,

The slit (34) is flush with the wall of the main channel (11).

10. An endoscope (200), characterized in that: the instrument channel connection valve (100) comprises a handle (6), an instrument nozzle (7) and the instrument channel connection valve (100) according to any one of claims 1-9, wherein the outlet end of a main pipe (1) of the instrument channel connection valve (100) is connected with an instrument insertion port of the instrument nozzle (7), and the instrument nozzle (7) is mounted on the handle (6).