CN222323971U - Endoscope self-locking suction mechanism and endoscope - Google Patents

Abstract

The utility model relates to the technical field of medical instruments, and in particular to an endoscope self-locking suction mechanism and an endoscope. The mechanism includes a suction valve body, a valve body column, an elastic reset member and a sealing member; a suction chamber is provided in the suction valve body, and the suction chamber has an inlet and an outlet; a hollow guide sleeve is provided in the suction chamber, and at least one limiting groove and at least one guide groove are provided on the side wall of the hollow guide sleeve; one end of the valve body column is inserted into the hollow guide sleeve, and at least one limiting protrusion is provided on the cylindrical surface of the valve body column, and any limiting protrusion has a first state of being inserted into a limiting groove and a second state of being inserted into a guide groove; the elastic reset member is used to convert the limiting protrusion between the first state and the second state and lock it in the first state or the second state; the sealing member is used to connect and block the inlet and the outlet. The present application can lock the inlet and the outlet of the suction chamber in the connected state or the blocked state, which is convenient for the use of the endoscope and the operation.

Description

Endoscope self-locking suction mechanism and endoscope

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an endoscope self-locking type suction mechanism and an endoscope.

Background

In the medical field, endoscopes are widely used to observe the inside of a body cavity for diagnosis or treatment. The endoscope includes an insertion portion and an operation portion for operating the insertion portion. The insertion portion is provided with a suction passage leading to a suction port at the distal end thereof. The suction channel is connected to a suction button cap provided on the operation unit, and an instrument channel suitable for passing an examination instrument such as forceps or injecting washing water is provided in the endoscope. In order to make the insertion portion thinner, the suction channel and the instrument channel are often used together, and in this case, the suction channel and the instrument channel share a single channel. The suction valve main body is connected to a suction passage and a discharge passage leading to a negative pressure source such as a suction pump, and the suction passage communicates with the discharge passage by pressing the suction button cap to suck the suction port. When the suction operation time is long, the button cap is continuously pressed for a long time, so that finger fatigue on the use can be brought to an operator, and the operator can be further influenced whether the operation is finished successfully or not finally.

Disclosure of utility model

A first object of the present utility model is to provide an endoscope self-locking type suction mechanism for solving the technical problem that the prior art endoscope requires a long time to press a button cap when performing a suction operation, resulting in inconvenient operation.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

An endoscope self-locking suction mechanism comprises a suction valve main body, a valve body column, a sealing element and an elastic resetting element, wherein the sealing element is arranged on the valve body column;

An attraction cavity is arranged in the attraction valve main body, and the attraction cavity is provided with an inlet and an outlet; a hollow guide sleeve is arranged in the suction cavity, and at least one limiting groove and at least one guide groove are formed in the side wall of the hollow guide sleeve; one end of the valve body column is inserted into the hollow guide sleeve, at least one limiting protrusion is arranged on the cylindrical surface of the valve body column, and any one limiting protrusion is in a first state of being inserted into one limiting groove and a second state of being inserted into one guide groove; the valve body column is configured to be capable of enabling any one of the limit protrusions to be switched between the first state and the second state when the valve body column is pressed and rotated, so that the sealing member is enabled to be connected with and blocked from the inlet and the outlet.

Further, one end of the hollow guide sleeve is provided with at least one group of limiting teeth, any group of limiting teeth comprises two connected first helical teeth, tooth gaps of the two first helical teeth connected into a whole form a limiting groove, and one end of the limiting protrusion, which is close to the hollow guide sleeve, is provided with a helical tooth structure matched with the first helical teeth.

Further, the elastic reset piece is a compression spring or a disc spring.

Further, an accommodating groove is formed in the inner end face, far away from the hollow guide sleeve, of the suction cavity, the elastic reset piece is arranged in the accommodating groove, and one end, far away from the hollow guide sleeve, of the valve body column is inserted into the accommodating groove and is abutted to the elastic reset piece.

Further, the valve body valve further comprises a button cap, one end of the button cap is inserted into the hollow guide sleeve and can be abutted with the valve body column, and the other end of the button cap is positioned outside the suction cavity;

at least one clamping block is arranged on the outer circumferential surface of the button cap, and any one of the clamping blocks is arranged in one guide groove in a sliding mode.

Further, the button cap is of a shell structure with an opening at one end, and the opening end of the button cap is inserted into the hollow guide sleeve;

The limiting grooves and the guide grooves are alternately arranged one by one along the circumferential direction of the hollow guide sleeve, at least two pushing teeth are arranged on the end face of the opening end of the button cap, any one of the limiting grooves and any one of the guide grooves are respectively arranged corresponding to one of the pushing teeth, and the pushing teeth are used for pushing the limiting protrusions to switch between the first state and the second state.

Further, the number of the limit grooves is the same as that of the guide grooves.

Further, a partition plate is arranged in the suction cavity and is positioned between the inlet and the outlet; the valve body column penetrates through the valve, and a gap is reserved between the valve body column and the valve;

When the limiting protrusion is in the first state, the sealing element is arranged at intervals with the partition board, and when the limiting protrusion is in the second state, the sealing element is abutted against the partition board and seals the gap between the valve and the valve body column.

Further, a limit ring groove is formed in the cylindrical surface of the valve body column, the sealing element is a sealing ring, and the sealing element is clamped in the limit ring groove.

A second object of the present utility model is to provide an endoscope comprising the self-locking suction mechanism of any of the above embodiments.

The utility model has the beneficial effects that:

The utility model provides an endoscope self-locking suction mechanism, which comprises a suction valve main body, a valve body column, a sealing element and an elastic resetting element, wherein the sealing element is arranged on the valve body column;

The suction valve body is internally provided with a suction cavity which is provided with an inlet and an outlet; the suction cavity is internally provided with a hollow guide sleeve, the side wall of the hollow guide sleeve is provided with at least one limit groove and at least one guide groove, one end of the valve body column is inserted into the hollow guide sleeve, the cylindrical surface of the valve body column is provided with at least one limit protrusion, any one limit protrusion is provided with a first state inserted into the limit groove and a second state inserted into the guide groove, the elastic reset piece is used for switching and locking the limit protrusion between the first state and the second state in the first state or the second state, and when the valve body column is configured to press and rotate the valve body column, any limit protrusion can be switched between the first state and the second state, so that the sealing piece is connected and blocked in an inlet and an outlet.

When the suction operation is not needed, the valve body column is pressed and rotated, so that any one of the limit protrusions is in a second state of being inserted into one of the guide grooves, and at the moment, the sealing element blocks the inlet and the outlet of the suction cavity. According to the application, the limit bulge can be locked in the limit groove or the guide groove, so that the inlet and the outlet of the suction cavity are kept in a connection state or a blocking state, and therefore, an operator does not need to continuously press the valve body column in the suction operation process, the problem of finger fatigue of the operator is avoided, and the use of an endoscope and the operation are facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of an endoscope self-locking suction mechanism provided by an embodiment of the present utility model;

FIG. 2 is a side view of an endoscope self-locking suction mechanism provided in an embodiment of the present utility model;

FIG. 3 is a cross-sectional view at A-A of FIG. 2 when the spacing projection is in a first state;

FIG. 4 is a schematic diagram of a hollow guide sleeve and a suction valve cover plate according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a valve body post and seal provided in an embodiment of the present utility model;

FIG. 6 is a schematic view of the structure of a button cap according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view at A-A of FIG. 2 when the limit projection is in the process of switching from the first state to the second state;

FIG. 8 is a cross-sectional view at A-A of FIG. 2 when the spacing projection is in a second state;

Fig. 9 is a cross-sectional view at A-A of fig. 2 when the limit projection is in the process of switching from the second state to the first state.

Icon:

1-suction valve main body, 11-suction cavity, 111-inlet, 112-outlet, 12-hollow guide sleeve, 121-limit groove, 122-guide groove, 123-limit tooth group, 1231-first helical tooth, 13-containing groove, 14-partition plate, 141-valve, 15-suction valve shell and 16-suction valve cover plate;

2-valve body column, 21-limit bulge, 22-limit ring groove;

3-seals;

4-elastic restoring piece;

5-button cap, 51-fixture block and 52-pushing tooth.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the description of the present utility model, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, in the description of the present utility model, the terms "connected" and "mounted" should be understood in a broad sense, and for example, they may be fixedly connected, detachably connected, or integrally connected, may be directly connected, may be connected through an intermediate medium, and may be mechanically connected or electrically connected. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

When the conventional endoscope is used for suction operation, an operator needs to continuously press the button cap for a long time, so that finger fatigue on the use of the endoscope can be brought to the operator, and the operator can be further influenced whether the operation is finally finished smoothly or not.

Based on this, the present utility model provides an endoscope self-locking suction mechanism, referring to fig. 1 to 3, which includes a suction valve body 1, a valve body column 2, a seal member 3, and an elastic restoring member 4, the seal member 3 being provided on the valve body column 2;

The suction valve body 1 is internally provided with a suction cavity 11, the suction cavity 11 is provided with an inlet 111 and an outlet 112, the suction cavity 11 is internally provided with a hollow guide sleeve 12, the side wall of the hollow guide sleeve 12 is provided with at least one limiting groove 121 and at least one guide groove 122, one end of the valve body column 2 is inserted into the hollow guide sleeve 12, the cylindrical surface of the valve body column 2 is provided with at least one limiting protrusion 21, any one limiting protrusion 21 is provided with a first state inserted into one limiting groove 121 and a second state inserted into one guide groove 122, the elastic reset piece 4 is used for switching and locking the limiting protrusion 21 between the first state and the second state in the first state or the second state, and the valve body column 2 is configured to enable any one limiting protrusion 21 to be switched between the first state and the second state when being pressed and rotated so as to enable the sealing piece 3 to be communicated with and block the inlet 111 and the outlet 112.

When the suction operation is required, the valve body column 2 is pressed and rotated so that any one of the limit protrusions 21 is in a first state of being inserted into one of the limit grooves 121, at this time, the inlet 111 and the outlet 112 of the suction chamber 11 are connected, the suction operation is possible through the suction chamber 11, and when the suction operation is not required, the valve body column 2 is pressed and rotated so that any one of the limit protrusions 21 is in a second state of being inserted into one of the guide grooves 122, at this time, the sealing member 3 blocks the inlet 111 and the outlet 112 of the suction chamber 11. The application can lock the limit bulge 21 in the limit groove 121 or the guide groove 122, so that the inlet 111 and the outlet 112 of the suction cavity 11 are kept in a connected state or a blocking state, thereby avoiding the problem of finger fatigue of an operator in the suction operation process without continuous pressing, and facilitating the use of an endoscope and the operation.

In this embodiment, the suction valve body 1 includes a suction valve housing 15 having one end opened and a suction valve cover 16 covering the opening of the suction valve housing 15, the suction valve housing 15 and the suction valve cover 16 are connected to form a suction chamber 11, and an inlet 111 and an outlet 112 communicating with the suction chamber 11 are provided on a side wall of the suction valve housing 15. Referring to fig. 4, a hollow guide sleeve 12 is provided on an inner end surface of the suction valve cover plate 16, and alternatively, the suction valve cover plate 16 and the hollow guide sleeve 12 are integrally formed. The suction valve cover plate 16 and the hollow guide sleeve 12 are not limited to be integrally formed, but may be connected by other connection means such as glue connection, screw connection, welding, etc., or the suction valve housing 15 is not limited to be integrally formed, and may be connected by other connection means such as glue connection, screw connection, welding, etc.

Referring to fig. 4, one end of the hollow guide sleeve 12 is provided with at least one set of limiting teeth 123, any set of limiting teeth 123 includes two connected first helical teeth 1231, a limiting groove 121 is formed by the tooth gaps of the two connected first helical teeth 1231, and in combination with fig. 3, one end of the limiting protrusion 21 near the hollow guide sleeve 12 is provided with a helical tooth structure adapted to the first helical teeth 1231. When the limiting projection 21 is in the first state, the helical tooth-shaped structure of the end of the limiting projection 21 is inserted into the backlash of the two first helical teeth 1231.

Specifically, any one of the first helical teeth 1231 includes a straight tooth surface and a helical tooth surface connected at an angle, wherein the straight tooth surface is substantially parallel to the axial direction of the valve body pillar 2, one of the first helical teeth 1231 is connected to one side groove wall of the adjacent guide groove 122, the helical tooth surface is connected to the straight tooth surface of the other first helical tooth 1231, and the helical tooth surface of the other first helical tooth 1231 is connected to one side groove wall of the adjacent guide groove 122 in the set of limiting teeth 123. Analyzing the above structure, one of the two opposite side walls of each guide groove 122 is connected to the inclined tooth surface of the adjacent first inclined tooth 1231, and the other side wall is connected to the straight tooth surface of the adjacent first inclined tooth 1231, and one of the two side walls of each limiting groove 121 is the inclined tooth surface of one first inclined tooth 1231 in the limiting tooth group 123, and the other side wall is the straight tooth surface of the other first inclined tooth 1231 in the limiting tooth group 123.

Further, a partition plate 14 is arranged in the suction cavity 11, and the partition plate 14 is positioned between the inlet 111 and the outlet 112, a valve 141 is arranged on the partition plate 14, the valve body column 2 penetrates through the valve 141, and a gap is arranged between the valve body column 2 and the valve 141;

When the limit projection 21 is in the first state, the sealing member 3 is arranged at a distance from the partition plate 14, the inlet 111 and the outlet 112 of the suction chamber 11 are communicated through the gap between the valve body column 2 and the valve 141, and when the limit projection 21 is in the second state, the sealing member 3 abuts against the partition plate 14 and blocks the gap between the valve 141 and the valve body column 2, thereby blocking the inlet 111 and the outlet 112 of the suction chamber 11.

Referring to fig. 5, a limiting ring groove 22 is formed in the cylindrical surface of the valve body column 2, the sealing element 3 is a sealing ring, and the sealing element 3 is clamped in the limiting ring groove 22. The above structure restricts the relative positions of the seal member 3 and the valve body column 2 so that the seal member 3 can move in synchronization with the valve body column 2.

In this embodiment, the partition 14 divides the suction chamber 11 into two parts, the outlet 112 is connected to one part of the two parts, the hollow guide sleeve 12 and the limit protrusion 21 on the valve body column 2 are located in the chamber connected to the outlet 112, the inlet 111 is connected to the other part of the two parts, and the sealing member 3 is located in the chamber connected to the inlet 111. The distance between the bottom of the limit groove 121 and the partition 14 is smaller than the distance between the bottom of the guide groove 122 and the partition 14, so that the seal 3 is spaced from the partition 14 when the limit projection 21 abuts in the limit groove 121, and the seal 3 can abut on the partition 14 when the limit projection 21 is located in the guide groove 122. It will be appreciated that the positions of the inlet 111 and outlet 112 of the aspiration chamber 11 may be interchanged without affecting the use of the mechanism.

In other embodiments, the seal 3 may be disposed on the same side of the bulkhead 14 as the hollow guide sleeve 12, in which case the seal 3 can abut the bulkhead 14 when the limit projection 21 abuts the limit groove 121, and the seal 3 is spaced from the bulkhead 14 when the limit projection 21 is located in the guide groove 122.

With continued reference to fig. 3, two ends of the elastic restoring member 4 are respectively abutted against the valve body column 2 and the suction valve body 1, and the elastic restoring member 4 is used for pushing the valve body column 2 and driving the limiting protrusion 21 to move towards a direction close to the bottom of the limiting groove 121 or the bottom of the guiding groove 122, so that the limiting protrusion 21 is locked in the first state or the second state.

Alternatively, the elastic restoring member 4 is a compression spring or a disc spring. In this embodiment, the elastic restoring member 4 is provided between the end of the valve body post 2 remote from the hollow guide sleeve 12 and the inner end surface of the suction chamber 11.

On the basis of the structure, the inner end face of the suction cavity 11, which is far away from the hollow guide sleeve 12, is provided with the accommodating groove 13, the elastic resetting piece 4 is arranged in the accommodating groove 13, and one end of the valve body column 2, which is far away from the hollow guide sleeve 12, is inserted into the accommodating groove 13 and is abutted against the elastic resetting piece 4. The elastic restoring member 4 can apply an elastic force to move the valve body post 2 toward the hollow guide sleeve 12, so that the limit projection 21 on the valve body post 2 can be maintained in the first state or the second state.

In other embodiments, the elastic restoring member 4 may also be sleeved on the valve body column 2 and disposed between the partition 14 and a shoulder on the valve body column 2.

With continued reference to fig. 3, the self-locking suction mechanism of the endoscope provided by the application further comprises a button cap 5, wherein one end of the button cap 5 is inserted into the hollow guide sleeve 12 and can be abutted with the valve body column 2, and the other end of the button cap 5 is positioned outside the suction cavity 11.

Referring to fig. 6, at least one clamping block 51 is disposed on the outer peripheral surface of the button cap 5, and any one clamping block 51 is slidably disposed in one guiding slot 122, so that the button cap 5 can only move axially along itself and can hardly rotate due to the sliding fit between the guiding slot 122 and the clamping block 51.

In the above embodiment, pressing the button cap 5 enables the valve body post 2 to be indirectly pressed and passively rotated, so that the limit projection 21 on the valve body post 2 is switched between the first state and the second state. The present embodiment can switch and lock the inlet 111 and the outlet 112 of the suction chamber 11 between the on state and the off state by only pressing the button cap 5 by an operator, thereby facilitating the use of the endoscope and the operation.

In other embodiments, the button cap 5 may not be provided, in which embodiment the valve body post 2 penetrates the hollow guide sleeve 12, and one end of the valve body post 2 protrudes from the suction cavity 11, and the operator presses and rotates the end of the valve body post 2 protruding from the suction cavity 11, so that the limit protrusion 21 on the valve body post 2 can be switched between the first state and the second state.

In the embodiment without the button cap 5, the operator needs to press the valve body post 2 until the limit protrusion 21 is disengaged from the limit groove 121 or the guide groove 122, and then rotate the valve body post 2, so as to switch the limit protrusion 21 on the valve body post 2 between the first state and the second state. Illustratively, in the initial state, the limit protrusion 21 on the valve body post 2 is in a first state of being inserted into one limit groove 121, the limit protrusion 21 needs to be switched from the first state to the second state, firstly, an operator needs to press the valve body post 2 and drive the limit protrusion 21 to be separated from the limit groove 121, then, the valve body post 2 is kept in the pressed state and rotated until the limit protrusion 21 on the valve body post 2 is aligned with the inlet of the guide groove 122, finally, the valve body post 2 is released, the valve body post 2 drives the limit protrusion 21 to move towards the direction approaching to the groove bottom of the guide groove 122 under the pushing of the elastic reset piece 4, and the limit protrusion 21 is switched from the first state to the second state through the operation.

As can be seen from the above, in the embodiment where the button cap 5 is provided, the operator can switch the state of the limit protrusion 21 only by pressing the button cap 5, while in the embodiment where the button cap 5 is not provided, the operator needs to press and rotate the valve body column 2 to switch the state of the limit protrusion 21. Therefore, the setting of the button cap 5 can simplify the operation flow, realize one-hand operation, and can also realize automatic accurate alignment of the limit protrusion 21 and the limit groove 121 or the guide groove 122, and realize accurate switching of the state of the limit protrusion 21.

Referring to fig. 3 and 6, the button cap 5 is a case structure having one end opened, and the opened end of the button cap 5 is inserted into the hollow guide sleeve 12;

The limiting grooves 121 and the guide grooves 122 are alternately arranged one by one along the circumferential direction of the hollow guide sleeve 12, at least two pushing teeth 52 are arranged on the end face of the opening end of the button cap 5, any one limiting groove 121 and any one guide groove 122 are respectively arranged corresponding to one pushing tooth 52, and the pushing teeth 52 are used for pushing the limiting protrusions 21 to switch between a first state and a second state. When the push button cap 5 is used, the push teeth 52 can be driven to move to be in contact with the limiting protrusions 21 by pressing the push button cap 5, and after the push teeth 52 are in contact with the limiting protrusions 21, the push button cap 5 is continuously pressed, so that the limiting protrusions 21 can be pushed to move and be switched between the first state and the second state.

Specifically, taking the orientation shown in fig. 3 as an example, the upper end of the valve body column 2, the lower end of the button cap 5 and the hollow guide sleeve 12 are sequentially nested from inside to outside, at least one limiting protrusion 21 is circumferentially arranged on a cylindrical surface of the valve body column 2 below the button cap 5, at least one limiting groove 121 and at least one guide groove 122 are alternately arranged on the side wall of the hollow guide sleeve 12 one by one in the circumferential direction, one side, far away from the cylindrical surface of the valve body column 2, of the limiting protrusion 21 is inserted into one limiting groove 121 or one guide groove 122, a plurality of pushing teeth 52 are circumferentially arranged on the end surface of the lower end of the button cap 5, any one limiting groove 121 and any one guide groove 122 are respectively corresponding to one pushing tooth 52, the tooth tips of the pushing teeth 52 are approximately positioned in the middle of the limiting groove 121 in the corresponding set of limiting grooves 121, and the tooth tips of the pushing teeth 52 are approximately positioned in the middle of the corresponding guide grooves 122 in the corresponding set of guide grooves 122 and pushing teeth 52.

In the analysis of the above structure, the pushing teeth 52 are located between the cylindrical surface of the valve body column 2 and the side wall of the hollow guide sleeve 12, and the pushing teeth 52 are located above the limit protrusions 21. When the state of the limit protrusion 21 needs to be switched, the push button cap 5 is pushed downwards to drive the push button cap 52 to move downwards, so that the push button cap 52 is abutted against the limit protrusion 21 in the corresponding limit groove 121 or guide groove 122 (specifically, the inclined tooth surface of the push button cap 52 is abutted against the inclined tooth surface of the upper end of the limit protrusion 21), then the push button cap 5 is continuously pushed downwards until the limit protrusion 21 in the corresponding limit groove 121 or guide groove 122 is pushed out, after the limit protrusion 21 is pushed out of the limit groove 121 or the guide groove 122, the push button cap 5 is continuously pushed due to the fact that the limit groove 121 or the guide groove 122 is not used for restraining, the limit protrusion 21 can rotate along the axial direction of the valve body column 2, when the limit protrusion 21 rotates until the inclined tooth surface of the limit protrusion 21 is abutted against the inclined tooth surface of the adjacent first inclined tooth 1231, the push button cap 5 is released, the elastic reset piece 4 pushes the valve body column 2 to move upwards, and then the limit protrusion 21 is driven to slide into the guide groove 122 or the guide groove 122 along the inclined tooth surface of the first inclined tooth 1231, and the limit protrusion 21 is switched to the state once.

On the basis of the above structure, the number of the limit grooves 121 is the same as the number of the guide grooves 122. In this embodiment, the number of the pushing teeth 52 may be equal to the sum of the number of the limiting grooves 121 and the guide grooves 122. It is understood that the number of the pushing teeth 52 has no direct relation to the number of the limiting grooves 121 and the guiding grooves 122, and the number of the pushing teeth 52 may be greater than the sum of the number of the limiting grooves 121 and the guiding grooves 122.

In this embodiment, the number of the limiting teeth groups 123 is four, so that four limiting grooves 121 are formed, the number of the guide grooves 122, the limiting protrusions 21 and the clamping blocks 51 is four, the number of the pushing teeth 52 is eight, the four limiting grooves 121 and the four guide grooves 122 are alternately arranged one by one along the circumferential direction of the hollow guide sleeve 12, after the opening ends of the button caps 5 are inserted into the hollow guide sleeve 12, the four clamping blocks 51 are slidably arranged in the four guide grooves 122 one by one, the tooth tips of each pushing tooth 52 are located approximately in the middle of the corresponding limiting groove 121 or the guide groove 122, one end of the valve body column 2 is inserted into the hollow guide sleeve 12 and inserted into the button caps 5, namely, the valve body column 2, the button caps 5 and the hollow guide sleeve 12 are sequentially nested and coaxially arranged from inside to outside, and the four limiting protrusions 21 on the valve body column 2 are uniformly distributed along the circumferential direction of the valve body column 2, so that the four limiting protrusions 21 can be simultaneously inserted into the four limiting grooves 121 or the four guide grooves 122 respectively.

In this embodiment, each of the limiting grooves 121 and each of the guiding grooves 122 are disposed on the side wall of the hollow guiding sleeve 12 in a penetrating manner, one side of the limiting protrusion 21 is connected to the cylindrical surface of the valve body pillar 2, and the other side of the limiting protrusion 21 penetrates the limiting groove 121 or the guiding groove 122 and is located outside the hollow guiding sleeve 12.

In other embodiments, each limiting groove 121 and each guiding groove 122 may be concavely disposed on the inner side surface of the hollow guide sleeve 12, in which embodiment, one side of the limiting protrusion 21 is connected to the cylindrical surface of the valve body pillar 2, and the other side of the limiting protrusion 21 is inserted into the limiting groove 121 or the guiding groove 122.

The operation of the suction mechanism provided by the application will be described in detail below:

Referring to fig. 3, the four limit protrusions 21 are in a first state of being respectively inserted into the four limit grooves 121 (i.e., being clamped between the tooth spaces of the limit tooth group 123) as an initial state, the sealing member 3 is spaced from the partition 14 in the initial state, the inlet 111 and the outlet 112 of the suction chamber 11 are conducted through the gap between the valve body column 2 and the valve 141, and the four limit protrusions 21 can be locked in the first state under the pushing of the elastic reset member 4, and at this time, the suction operation can be performed.

Referring to fig. 7, when the suction operation is not required, the push button cap 5 is pressed and the push teeth 52 are driven to move, so that the limit protrusion 21 is pushed out of the limit groove 121, then, the push button cap 5 is continuously pushed down, since the limit protrusion 21 is not limited by the limit groove 121, the limit protrusion 21 is rotated in the axial direction of the valve body column 2 under the pushing of the inclined tooth surface of the push teeth 52, and when the limit protrusion 21 is rotated to contact with the inclined tooth surface of one of the first inclined teeth 1231, the push button cap 5 is released, and the limit protrusion 21 is slid into the guide groove 122 and locked in the second state under the pushing of the elastic restoring member 4.

With further reference to fig. 8, the valve body column 2 is reset under the pushing of the elastic reset piece 4, so as to drive the limiting protrusions 21 to slide into the guide grooves 122 along the inclined tooth surfaces of one of the first inclined teeth 1231, and the four limiting protrusions 21 are in a second state of being respectively inserted into the four guide grooves 122, at this time, the sealing piece 3 abuts against the partition 14 and seals the gap between the valve 141 and the valve body column 2, thereby blocking the inlet 111 and the outlet 112 of the suction cavity 11.

Referring to fig. 9, when it is necessary to switch the limit projection 21 from the second state to the first state, the above steps are repeated.

Note that the initial state in the above description is a state prescribed for convenience of description, and in actual use, the second state in which the stopper projection 21 is inserted into the guide groove 122 is a normal state. In a normal state, the inlet 111 and the outlet 112 of the suction chamber 11 are in a blocked state, the suction mechanism is not operated, and when the suction operation is required, the operator turns on the inlet 111 and the outlet 112 of the suction chamber 11 by pressing the button cap 5, so that the suction operation can be performed through the suction chamber 11.

The suction mechanism provided by the application not only has a self-locking function, but also can switch and lock the inlet 111 and the outlet 112 of the suction cavity 11 between the on state and the off state by only pressing the button cap 5 by an operator, realizes one-hand operation, is convenient for the use of an endoscope and the operation, has the advantages of simple structure, convenience for installation, low cost and the like, and is suitable for wide popularization and use.

An embodiment of the second aspect of the present application provides an endoscope, where the endoscope includes the self-locking suction mechanism provided in any one of the above embodiments, so that the self-locking suction mechanism has at least the technical effects of any one of the above embodiments, and will not be described herein.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.

Claims (10)

1. The self-locking suction mechanism of the endoscope is characterized by comprising a suction valve main body (1), a valve body column (2), a sealing piece (3) and an elastic resetting piece (4), wherein the sealing piece (3) is arranged on the valve body column (2);

The suction valve comprises a suction valve body (1), wherein a suction cavity (11) is arranged in the suction valve body (1), the suction cavity (11) is provided with an inlet (111) and an outlet (112), a hollow guide sleeve (12) is arranged in the suction cavity (11), at least one limiting groove (121) and at least one guide groove (122) are arranged on the side wall of the hollow guide sleeve (12), one end of a valve body column (2) is inserted into the hollow guide sleeve (12), at least one limiting protrusion (21) is arranged on the cylindrical surface of the valve body column (2), any one limiting protrusion (21) is provided with a first state inserted into one limiting groove (121) and a second state inserted into one guide groove (122), and an elastic reset piece (4) is used for enabling the limiting protrusion (21) to be switched between the first state and the second state or locked in the second state, and when the valve body column (2) is pressed and rotated, the limiting protrusion (21) can be enabled to be switched between the first state and the second state and the inlet (112) in a blocking mode.

2. The endoscope self-locking suction mechanism according to claim 1, wherein one end of the hollow guide sleeve (12) is provided with at least one group of limiting teeth (123), any group of limiting teeth (123) comprises two connected first helical teeth (1231), tooth gaps of the two first helical teeth (1231) connected into a whole form a limiting groove (121), and one end of the limiting protrusion (21) close to the hollow guide sleeve (12) is provided with a helical tooth structure matched with the first helical teeth (1231).

3. An endoscope self-locking suction mechanism according to claim 1, characterized in that the elastic return member (4) is a compression spring or a disc spring.

4. The self-locking suction mechanism of an endoscope according to claim 3, wherein a containing groove (13) is formed in the inner end surface of the suction cavity (11) far away from the hollow guide sleeve (12), the elastic reset piece (4) is arranged in the containing groove (13), and one end of the valve body column (2) far away from the hollow guide sleeve (12) is inserted into the containing groove (13) and abutted against the elastic reset piece (4).

5. The endoscope self-locking suction mechanism according to claim 2, further comprising a button cap (5), wherein one end of the button cap (5) is inserted into the hollow guide sleeve (12) and can be abutted with the valve body column (2), and the other end of the button cap (5) is positioned outside the suction cavity (11);

At least one clamping block (51) is arranged on the outer circumferential surface of the button cap (5), and any one clamping block (51) is arranged in one guide groove (122) in a sliding mode.

6. The endoscope self-locking suction mechanism according to claim 5, wherein the button cap (5) is a shell structure with one end open, and the open end of the button cap (5) is inserted into the hollow guide sleeve (12);

The limiting grooves (121) and the guide grooves (122) are alternately arranged one by one along the circumferential direction of the hollow guide sleeve (12), at least two pushing teeth (52) are arranged on the end face of the opening end of the button cap (5), any one of the limiting grooves (121) and any one of the guide grooves (122) are respectively arranged corresponding to one of the pushing teeth (52), and the pushing teeth (52) are used for pushing the limiting protrusions (21) to switch between the first state and the second state.

7. The endoscope self-locking suction mechanism as set forth in any one of claims 5-6 wherein the number of limit grooves (121) is the same as the number of guide grooves (122).

8. The endoscope self-locking suction mechanism according to any one of claims 1 to 6, characterized in that a partition plate (14) is arranged in the suction cavity (11), the partition plate (14) is positioned between the inlet (111) and the outlet (112), a valve (141) is arranged on the partition plate (14), the valve body column (2) penetrates through the valve (141), and a gap is formed between the valve body column (2) and the valve (141);

When the limiting protrusion (21) is in a first state, the sealing piece (3) and the partition plate (14) are arranged at intervals, and when the limiting protrusion (21) is in a second state, the sealing piece (3) is abutted against the partition plate (14) and seals a gap between the valve (141) and the valve body column (2).

9. The endoscope self-locking suction mechanism according to claim 8, wherein a limit ring groove (22) is arranged on the cylindrical surface of the valve body column (2), the sealing element (3) is a sealing ring, and the sealing element (3) is clamped in the limit ring groove (22).

10. An endoscope comprising an endoscope self-locking suction mechanism as claimed in any one of claims 1 to 9.