Endoscope water-gas switching valve and endoscope operating handle

Abstract

The utility model discloses an endoscope water-gas switching valve and an endoscope operating handle, wherein the endoscope water-gas switching valve comprises a cylinder, a piston and a switching mechanism; the cylinder is provided with an air inlet nozzle, an air outlet nozzle, a water inlet nozzle and a water outlet nozzle; the air inlet nozzle, the air outlet nozzle and the water inlet nozzle are located on one side of the cylinder and extend obliquely downward, and the water outlet nozzle is arranged on the other side of the cylinder and extends horizontally; a plurality of sealing rings are arranged on the piston, and the plurality of sealing rings separate the inner cavity of the cylinder and the space between the piston into a plurality of independent annular cavities constituting a part of the corresponding fluid channel; the switching mechanism drives the piston to move, so as to realize the connection between the air inlet nozzle and the air outlet nozzle or the connection between the water inlet nozzle and the water outlet nozzle. The air inlet nozzle, the air outlet nozzle and the water inlet nozzle in the endoscope water-gas switching valve of the utility model are all located on the same side of the cylinder, which is conducive to the layout of the water-gas pipeline in the endoscope operating handle, making the water-gas pipeline in the endoscope operating handle more concise.

Description

Technical Field

[0001] The utility model belongs to the field of endoscopes, and in particular relates to an endoscope water-gas switching valve and an endoscope operating handle. Background Art

[0002] At present, endoscope systems are widely used in medical diagnosis. They are equipped with a device for delivering air and liquid into the body cavity, and can deliver water, liquid medicine, air, etc. into the body cavity as needed. In the existing technology, the air and liquid delivery of the endoscope is controlled by a fluid switching valve arranged on the operating part of the endoscope. The fluid switching valve is respectively provided with an air inlet, an air outlet, a liquid inlet and a liquid outlet, and then the air inlet, the air outlet, the liquid inlet and the liquid outlet are respectively sealed by many sealing rings. When it is necessary to feed air or liquid into the body cavity, the action of each sealing ring can be controlled by the corresponding operation button on the fluid switching valve, so that the corresponding sealing ring is opened or kept closed, thereby realizing the respective conduction or cutoff of each pipe opening.

[0003] For example, the invention patent application with application publication number CN 110522396 A discloses "a water-gas switching valve", which includes a valve body and an air inlet, an air outlet, a liquid inlet, and a liquid outlet opened on the side wall of the valve body along the length direction of the valve body, and a valve core that can be slidably arranged in the valve body along the length direction of the valve body; when the valve core slides to the first state position, the air inlet and the air outlet are connected, and the liquid inlet and the liquid outlet are cut off; when the valve core slides to the second state position, the air inlet and the air outlet are cut off, and the liquid inlet and the liquid outlet are connected. The above-mentioned water-gas switching valve can make the water-gas switching valve be in the air supply working condition and the infusion working condition respectively through the reciprocating sliding of the valve core in the valve body, and independently deliver the required gas or liquid to the end of the endoscope, which can effectively avoid water-gas mixing, water-gas leakage, and water-gas blockage. At the same time, it is simple and convenient to operate, and the operation efficiency is high when used by medical staff. The water-gas switching valve has a simple structure and low production cost.

[0004] However, the air inlet and air outlet, water inlet and water outlet in the above-mentioned water-gas switching valve are respectively located on both sides of the valve body. When the water-gas switching valve is installed in the endoscope operating handle, water-gas pipes need to be installed on the air inlet, air outlet, water inlet and water outlet in the water-gas switching valve. However, since the air inlet and air outlet, water inlet and water outlet are all arranged on both sides of the valve body, this will make the water-gas pipelines in the endoscope operating handle complicated. Utility Model Content

[0005] In order to overcome the deficiencies in the prior art, the utility model provides an endoscope water-gas switching valve.

[0006] The second purpose of the utility model is to provide an endoscope operating handle using the water-gas switching valve.

[0007] The technical solution of the utility model to solve the above technical problems is:

[0008] An endoscope water-gas switching valve comprises a cylinder body, a piston arranged in the cylinder body and a switching mechanism for driving the movement of the piston; the cylinder body is provided with an air inlet nozzle, an air outlet nozzle, a water inlet nozzle and a water outlet nozzle, wherein the air inlet nozzle, the air outlet nozzle and the water inlet nozzle are located on one side of the cylinder body and extend obliquely downward; the water outlet nozzle is arranged on the other side of the cylinder body and extends horizontally; a plurality of sealing rings are arranged on the piston, and the sealing rings separate the space between the inner cavity of the cylinder body and the piston into a plurality of independent annular cavities which constitute a part of the corresponding fluid channel; the switching mechanism drives the piston to move, thereby realizing the connection between the air inlet nozzle and the air outlet nozzle or the connection between the water inlet nozzle and the water outlet nozzle.

[0009] Preferably, the sealing rings are in four groups, which are respectively a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring from top to bottom.

[0010] Preferably, the switching mechanism includes a switching button and a compression spring, wherein the switching button is installed on the top of the piston, the compression spring is sleeved on the piston, the lower end of the compression spring acts on the cylinder body, and the upper end acts on the switching button; the elastic force of the compression spring prompts the switching button to drive the piston to move upward, so as to prompt the air inlet nozzle and the air outlet nozzle to be connected and at the same time prompt the water inlet nozzle and the water outlet nozzle to be disconnected.

[0011] Preferably, the piston is provided with a center hole between the second sealing ring and the third sealing ring, and both sides of the center hole extend to the sides of the piston; an exhaust channel is provided in the piston, the lower end of the exhaust channel is connected to the center hole, and the upper end extends vertically upward to the top of the piston; an exhaust hole is provided in the switch button, and the exhaust hole is connected to the exhaust channel.

[0012] Preferably, the air inlet nozzle, the air outlet nozzle, the water inlet nozzle and the water outlet nozzle are all provided with connecting parts for connecting to water and air pipelines.

[0013] Preferably, a protective rubber sleeve is provided on the outer side of the cylinder body.

[0014] An endoscope operating handle comprises a shell, a wire pulley group arranged on the shell, a rotating device for driving the wire pulley in the wire pulley group to rotate, and a braking device for braking the rotating device, wherein the water-gas switching valve and the drain valve are arranged on the shell.

[0015] Preferably, the sewage drain valve comprises a valve body and a valve core arranged in the valve body, wherein a sewage liquid inlet and a sewage liquid discharge port are respectively arranged on both sides of the valve body, a sewage drain button is arranged on the top of the valve core, and a reset spring is arranged between the sewage drain button and the valve body, one end of the reset spring acts on the valve body, and the other end acts on the sewage drain button; the elastic force of the reset spring causes the valve core to move upward to cause the sewage liquid inlet and the sewage liquid discharge port to be disconnected.

[0016] Preferably, the rotating device includes a first knob and a second knob, and the first knob and the second knob are respectively mounted on the mounting parts of the two groups of wire pulling wheels, and are used to drive the two groups of wire pulling wheels to rotate separately; the braking device includes a first braking knob and a second braking knob, wherein the first braking knob is used to brake the first knob, and the second braking knob is used to brake the second knob; wherein a braking structure is arranged between the first braking knob and the first knob, and between the second braking knob and the second knob, and the braking structure includes a coaxially arranged driving member and a braking member, wherein a driving part is arranged on the driving member, a matching part matching with the driving part is arranged on one side of the braking member, and a braking part is arranged on the other side of the braking member; when the first braking knob or the second braking knob rotates, the braking member and the driving member rotate relative to each other, and the driving part on the driving member drives the matching part on the braking member to move axially and causes the braking part on the braking member to be pressed against the first knob or the second knob, so as to achieve braking of the first knob or the second knob.

[0017] Preferably, the matching portion includes a guiding portion and a limiting portion, wherein the guiding portion is arranged opposite to the driving portion of the driving member, and the height of the guiding portion gradually increases along the circumferential direction of the braking member; the limiting portion is arranged at the highest point of the guiding portion, and is used to limit the driving portion in the driving member from continuing to rotate on the guiding portion in the braking member; or the limiting portion is respectively arranged at the highest point and the lowest point of the guiding portion; wherein the driving portion is composed of three groups, and the three groups of driving portions are arranged at equal angles on the circumference, and correspondingly, the matching portions are also composed of three groups, and the three groups of matching portions are also arranged at equal angles on the circumference.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0019] The air inlet nozzle, air outlet nozzle and water inlet nozzle in the endoscope water-gas switching valve of the utility model are all located on the same side of the cylinder body and extend obliquely downward; the water outlet nozzle is arranged on the other side of the cylinder body and extends horizontally; this is conducive to the layout of the water-gas pipeline in the endoscope operating handle, making the water-gas pipeline in the endoscope operating handle simpler and more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 and Figure 2 The three-dimensional structural schematic diagrams of the endoscope water-gas switching valve of the utility model are shown in two different viewing angles.

[0021] Figure 3 It is a cross-sectional view of the endoscope water-gas switching valve of the utility model (the switching button is not pressed).

[0022] Figure 4 It is a cross-sectional view of the endoscope water-gas switching valve of the utility model (the switching button has been pressed).

[0023] Figure 5 It is a structural schematic diagram of the endoscope operating handle of the utility model.

[0024] Figure 6 It is a schematic diagram of the structure of the cable pulling wheel group, the rotating device and the braking device. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0026] Example 1

[0027] See also Figure 1-Figure 4 The endoscope water-gas switching valve of the utility model comprises a cylinder body 9, a piston 3 arranged in the cylinder body 9 and a switching mechanism for driving the piston 3 to move; the cylinder body 9 is provided with an air inlet nozzle 10, an air outlet nozzle 11, a water inlet nozzle 12 and a water outlet nozzle 13, wherein the air inlet nozzle 10, the air outlet nozzle 11 and the water inlet nozzle 12 are located on one side of the cylinder body 9 and extend obliquely downward, and the water outlet nozzle 13 is arranged on the other side of the cylinder body 9 and extends horizontally; the piston 3 is provided with a plurality of sealing rings, and the plurality of sealing rings divide the space between the inner cavity of the cylinder body 9 and the piston 3 into a plurality of independent annular rings that constitute a part of the corresponding fluid channel cavity; the switching mechanism realizes the connection between the air inlet nozzle 10 and the air outlet nozzle 11 or the connection between the water inlet nozzle 12 and the water outlet nozzle 13 by driving the piston 3 to move; the switching mechanism includes a switching button 1 and a compression spring 2, wherein the switching button 1 is installed on the top of the piston 3, the compression spring 2 is sleeved on the piston 3, the lower end of the compression spring 2 acts on the cylinder body 9, and the upper end acts on the switching button 1; the elastic force of the compression spring 2 prompts the switching button 1 to drive the piston 3 to move upward, so as to prompt the air inlet nozzle 10 to be connected with the air outlet nozzle 11 and to prompt the water inlet nozzle 12 and the water outlet nozzle 13 to be disconnected.

[0028] In this embodiment, the sealing rings are in four groups, which are respectively the first sealing ring 5, the second sealing ring 6, the third sealing ring 7 and the fourth sealing ring 8 from top to bottom; in addition, the piston 3 is provided with a center hole 302 between the second sealing ring 6 and the third sealing ring 7, and both sides of the center hole 302 extend to the side of the piston 3; an exhaust channel 301 is provided in the piston 3, and the lower end of the exhaust channel 301 is connected to the center hole 302, and the upper end extends vertically upward to the top of the piston 3; the switch button 1 is provided with an exhaust hole 101, and the exhaust hole 101 is connected to the exhaust channel 301.

[0029] See also Figure 1-Figure 4 The air inlet nozzle 10, the air outlet nozzle 11, the water inlet nozzle 12 and the water outlet nozzle 13 are all provided with a connecting portion for connecting the water and gas pipeline, which is used to realize the communication between the air inlet nozzle 10, the air outlet nozzle 11, the water inlet nozzle 12 and the water outlet nozzle 13 and the water and gas pipeline, and the connecting portion is a boss structure, which is helpful to prevent the water and gas pipeline from escaping from the connecting portion.

[0030] See also Figure 1-Figure 4 A protective rubber sleeve 4 is provided on the outer side of the cylinder body 9.

[0031] See also Figure 1-Figure 4 The working principle of the endoscope water-gas switching valve of the utility model is:

[0032] In the initial state, the piston 3 is at rest in the cylinder 9 (eg Figure 3 As shown), at this time, the gas of the air inlet nozzle 10 can be discharged from the air outlet nozzle 11 and the air outlet at the same time, and the water flow cannot flow between the water inlet nozzle 12 and the water outlet nozzle 13 due to the isolation of the third sealing ring 7 and the fourth sealing ring 8; when the air outlet is pressed with a finger, the gas of the air outlet is blocked at this time, so the gas of the air inlet nozzle 10 can only flow completely from the air inlet nozzle 10 to the air outlet nozzle 11;

[0033] When the switch button 1 is pressed (such as Figure 4 As described above, due to the change in the position of the sealing ring, at this time, the gas of the air inlet nozzle 10 is sealed in the cylinder body 9 by the first sealing ring 5 and the second sealing ring 6, thereby causing the pipeline between the air inlet nozzle 10 and the air outlet nozzle 11 to be disconnected, while the pipeline between the water inlet nozzle 12 and the water outlet nozzle 13 is connected, and the water flows from the water inlet nozzle 12 into the water outlet nozzle 13.

[0034] When the external force pressing the switch button 1 is released, the switch button 1 and the piston 3 return to their initial state (eg, Figure 3The cylinder body 9 is restored to a state where the air inlet nozzle 10 and the air outlet nozzle 11 are connected. At this time, the gas enters from the air inlet nozzle 10 and flows out from the air outlet nozzle 11 and the exhaust port. At the same time, the piston 3 blocks the water flow channel, so that the pipeline between the water inlet nozzle 12 and the water outlet nozzle 13 is disconnected again.

[0035] Example 2

[0036] See also Figure 5 and Figure 6 The endoscope operating handle of the utility model comprises a housing, a wire pulley set arranged on the housing, a rotating device for driving the wire pulley in the wire pulley set to rotate, and a braking device for braking the rotating device, wherein the water-gas switching valve 14 and the drain valve 15 are arranged on the housing; wherein the water-gas switching valve 14 is implemented with reference to Example 1; and a water outlet pipe 16 is installed on the water outlet nozzle 13 of the water-gas switching valve 14;

[0037] The sewage discharge valve 15 comprises a valve body and a valve core 153 arranged in the valve body, wherein a sewage liquid inlet 155 and a sewage liquid discharge port 154 are respectively arranged on both sides of the valve body, a sewage discharge button 152 is arranged on the top of the valve core 153, and a return spring 151 is arranged between the sewage discharge button 152 and the valve body, one end of the return spring 151 acts on the valve body, and the other end acts on the sewage discharge button 152; the elastic force of the return spring 151 causes the valve core 153 to move upward, so as to cause the sewage liquid inlet 155 and the sewage liquid discharge port 154 to be disconnected; when the sewage discharge button 152 is pressed, the valve core 153 moves downward, so that the sewage liquid inlet 155 and the sewage liquid discharge port 154 are connected, thereby realizing sewage discharge.

[0038] See also Figure 5 and Figure 6The rotating device includes a first knob 21 and a second knob 23, and the first knob 21 and the second knob 23 are respectively mounted on the mounting parts of the two groups of wire pulling wheels, and are used to drive the two groups of wire pulling wheels to rotate separately; the braking device includes a first braking knob 19 and a second braking knob 26, wherein the first braking knob 19 is used to brake the first knob 21, and the second braking knob 26 is used to brake the second knob 23; wherein a braking structure is provided between the first braking knob 19 and the first knob 21, and between the second braking knob 26 and the second knob 23; the braking structure includes a coaxially arranged driving member and a braking member, wherein a driving part is provided on the driving member, and a matching part matching with the driving part is provided on one side of the braking member, and the other side of the braking member A braking part is provided; when the first brake knob 19 or the second brake knob 26 is rotated, the brake member and the driving member rotate relative to each other, and the driving part on the driving member drives the matching part on the brake member to move axially and causes the braking part on the brake member to be pressed against the first knob 21 or the second knob 23, so as to brake the first knob 21 or the second knob 23; the matching part includes a guiding part and a limiting part, wherein the guiding part is arranged opposite to the driving part of the driving member, and the height of the guiding part gradually increases along the circumferential direction of the brake member; the limiting part is arranged at the highest point of the guiding part, and is used to limit the driving part in the driving member from continuing to rotate on the guiding part in the brake member; or the limiting part is respectively arranged at the highest point and the lowest point of the guiding part;

[0039] The specific structures of the above-mentioned wire pulley assembly, rotating device and braking device can be implemented with reference to the patents previously applied for by the applicant, namely, "a rotating braking device for an endoscope" disclosed in the utility model patent with the authorization announcement number CN219147515U and "an endoscope" disclosed in the invention patent application with the application publication number CN115813316A. The difference between this embodiment and the above-mentioned two patent applications is that:

[0040] (1) In this embodiment, there are three groups of driving parts, which are arranged at equal angles in a circle (i.e., the angle between two adjacent groups of driving parts is 120 degrees). Correspondingly, there are three groups of matching parts, which are also arranged at equal angles in a circle.

[0041] (2) In the above two patent applications, a hook portion is used to hook the first knob or the second knob to limit the axial displacement of the sleeve (i.e., the movement stroke of the sleeve driven by the reset structure), and at the same time, the first knob and the second knob are also limited to prevent axial displacement;

[0042] In the present embodiment, a first external thread section is provided at the end of the first wire pulling wheel 18, and the first knob 21 is installed on the first external thread section and locked by a first locking nut 22; a second external thread section is provided at the end of the second wire pulling wheel 17, and the second knob 23 is installed on the second external thread section and locked by a second locking nut 24; the first locking nut 22 and the second locking nut 24 are used to install and limit the first knob 21 and the second knob 23; at the same time, the braking stroke of the first brake knob 19 and the second brake knob 26 (that is, the axial displacement of the first brake slider 20 and the second brake slider 25) is also limited. Compared with the snap connection methods of the previous two patent applications, the nut locking method adopted in the utility model is not only convenient for disassembly and assembly, but also has high limiting accuracy.

[0043] The above is a preferred implementation mode of the present invention, but the implementation mode of the present invention is not limited by the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An endoscope water-gas switching valve, characterized in that: It includes a cylinder body, a piston arranged in the cylinder body and a switching mechanism for driving the movement of the piston; the cylinder body is provided with an air inlet nozzle, an air outlet nozzle, a water inlet nozzle and a water outlet nozzle, wherein the air inlet nozzle, the air outlet nozzle and the water inlet nozzle are located on one side of the cylinder body and extend obliquely downward; the water outlet nozzle is arranged on the other side of the cylinder body and extends horizontally; a plurality of sealing rings are arranged on the piston, and the sealing rings separate the space between the inner cavity of the cylinder body and the piston into a plurality of independent annular cavities that constitute a part of the corresponding fluid channel; the switching mechanism drives the piston to move, thereby realizing the connection between the air inlet nozzle and the air outlet nozzle or the connection between the water inlet nozzle and the water outlet nozzle.

2. The endoscope water-gas switching valve according to claim 1, characterized in that: The sealing rings are divided into four groups, which are respectively a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring from top to bottom.

3. The endoscope water-gas switching valve according to claim 2, characterized in that: The switching mechanism includes a switching button and a compression spring, wherein the switching button is installed on the top of the piston, the compression spring is sleeved on the piston, the lower end of the compression spring acts on the cylinder body, and the upper end acts on the switching button; the elastic force of the compression spring prompts the switching button to drive the piston to move upward, so as to prompt the air inlet nozzle and the air outlet nozzle to be connected and at the same time prompt the water inlet nozzle and the water outlet nozzle to be disconnected.

4. The endoscope water-gas switching valve according to claim 3, characterized in that: The piston is provided with a center hole between the second sealing ring and the third sealing ring, and both sides of the center hole extend to the sides of the piston; an exhaust channel is provided in the piston, the lower end of the exhaust channel is connected to the center hole, and the upper end extends vertically upward to the top of the piston; an exhaust hole is provided in the switch button, and the exhaust hole is connected to the exhaust channel.

5. The endoscope water-gas switching valve according to claim 1, characterized in that: The air inlet nozzle, the air outlet nozzle, the water inlet nozzle and the water outlet nozzle are all provided with connecting parts for connecting to water and air pipelines.

6. The endoscope water-gas switching valve according to claim 1, characterized in that: A protective rubber sleeve is arranged on the outer side of the cylinder body.

7. An endoscope operating handle, characterized in that: It includes a shell, a wire pulley group arranged on the shell, a rotating device for driving the wire pulley in the wire pulley group to rotate, and a braking device for braking the rotating device, wherein the endoscope water-gas switching valve and drain valve are arranged on the shell.

8. The endoscope operating handle according to claim 7, characterized in that: The sewage discharge valve comprises a valve body and a valve core arranged in the valve body, wherein a sewage liquid inlet and a sewage liquid discharge port are respectively arranged on both sides of the valve body, a sewage discharge button is arranged on the top of the valve core, and a return spring is arranged between the sewage discharge button and the valve body, one end of the return spring acts on the valve body, and the other end acts on the sewage discharge button; the elastic force of the return spring causes the valve core to move upward to cause the sewage liquid inlet and the sewage liquid discharge port to be disconnected.

9. The endoscope operating handle according to claim 7, characterized in that: The rotating device includes a first knob and a second knob, and the first knob and the second knob are respectively mounted on the mounting parts of the two groups of wire pulling wheels, and are used to drive the two groups of wire pulling wheels to rotate separately; the braking device includes a first braking knob and a second braking knob, wherein the first braking knob is used to brake the first knob, and the second braking knob is used to brake the second knob; wherein a braking structure is arranged between the first braking knob and the first knob, and between the second braking knob and the second knob, and the braking structure includes a coaxially arranged driving member and a braking member, wherein a driving part is arranged on the driving member, a matching part matching with the driving part is arranged on one side of the braking member, and a braking part is arranged on the other side of the braking member; when the first braking knob or the second braking knob rotates, the braking member and the driving member rotate relative to each other, and the driving part on the driving member drives the matching part on the braking member to move axially and causes the braking part on the braking member to be pressed against the first knob or the second knob, so as to achieve braking of the first knob or the second knob.

10. The endoscope operating handle according to claim 9, characterized in that: The matching part includes a guiding part and a limiting part, wherein the guiding part is arranged opposite to the driving part of the driving member, and the height of the guiding part gradually increases along the circumferential direction of the braking member; the limiting part is arranged at the highest point of the guiding part, and is used to limit the driving part in the driving member from continuing to rotate on the guiding part in the braking member; or the limiting part is respectively arranged at the highest point and the lowest point of the guiding part; wherein the driving part is divided into three groups, and the three groups of driving parts are arranged at equal angles on the circumference, and correspondingly, the matching parts are also divided into three groups, and the three groups of matching parts are also arranged at equal angles on the circumference.

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