Endoscope bending part self-locking device and endoscope

Abstract

The utility model relates to the technical field of medical instruments, in particular to an endoscope bending part self-locking device and an endoscope. The device comprises a shell, a traction wheel, a push handle and a self-locking assembly. The traction wheel is rotationally connected into the shell; the push handle is arranged outside the shell and is connected to the traction wheel; the self-locking assembly comprises a friction piece, a shifting rod and an elastic reset piece. The friction piece has a self-locking state abutting against the traction wheel and an unlocking state spaced from the traction wheel. The driving lever is rotationally connected to the push handle and is connected to the friction piece; the deflector rod is configured to rotate relative to the push handle after being stressed so as to pull the friction piece to move to an unlocking state; the elastic reset piece is used for driving the friction piece to reset so as to be locked in the self-locking state. Compared with an existing endoscope bending part self-locking device, the angle of the traction wheel can be conveniently and accurately adjusted, force applied to the shifting rod can be removed at any time in the adjusting process, and the adjusting precision is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a self-locking device for a curved portion of an endoscope and an endoscope. Background Art

[0002] The bending self-locking device of the endoscope is a common and important component in the clinical use of endoscopes. When using the endoscope, the doctor can drive the front end of the bending part of the endoscope to rotate by pushing the push handle of the self-locking device, so that the front end of the bending part is aligned with the lesion. After the front end of the bending part is aligned with the lesion, the bending part needs to be locked by the self-locking device to prevent the front end of the bending part from rotating to other positions.

[0003] At present, most of the endoscopes on the market are bent and self-locked by adding damping to the capstan, so that the friction of the capstan is greater than the sum of the restoring forces of the bending part and the surgical instrument in the instrument channel, so that the bending part can be maintained at the required bending angle and the operation can be completed by operating the surgical instrument. However, increasing the friction of the capstan also increases the external force required to push the push handle accordingly, that is, the force of the doctor's finger operating the push handle must be greater than the friction of the capstan to push the push handle, which makes the operation uncomfortable and difficult to achieve more precise adjustments. Utility Model Content

[0004] The first object of the utility model is to provide an endoscope bending portion self-locking device which is easy to operate and has high adjustment accuracy.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A self-locking device for a curved portion of an endoscope, comprising:

[0007] case;

[0008] A traction wheel, rotatably connected to the housing;

[0009] A push handle, disposed outside the housing and connected to the traction wheel;

[0010] The self-locking assembly comprises a friction member, a lever and an elastic reset member; the friction member has a self-locking state in contact with the traction wheel and an unlocking state spaced apart from the traction wheel; the lever is rotatably connected to the push handle, and the lever is connected to the friction member; the lever is configured to be able to rotate relative to the push handle after being subjected to force, so as to pull the friction member to move to the unlocking state; the elastic reset member is used to drive the friction member to reset so as to be locked in the self-locking state.

[0011] Furthermore, it also includes a traction wheel shaft rotatably connected to the housing, the traction wheel is mounted on the traction wheel shaft; a limiting hole is provided on the push handle, one end of the traction wheel shaft passes through the housing and is inserted into the limiting hole to prevent the traction wheel shaft from rotating relative to the push handle;

[0012] At least one first limiting surface is arranged on the inner circumference of the limiting hole, and a second limiting surface corresponding to the first limiting surface is arranged on the outer circumference of the traction wheel shaft. The corresponding first limiting surface and the second limiting surface abut against each other to prevent the traction wheel shaft from rotating relative to the push handle.

[0013] Furthermore, the self-locking assembly further comprises a lever and a connecting rod, wherein the lever is rotatably connected to the push handle, and two ends of the connecting rod are respectively hinged to the lever and the lever;

[0014] The connecting rod is a flexible structure or a rigid structure.

[0015] Further, the push handle is L-shaped, and comprises a manual operation portion and a connection portion connected to each other;

[0016] The manual operating part is located at the periphery of the shell, and the length direction of the manual operating part is substantially parallel to the rotation axis of the traction wheel; the connecting part is located at one end of the shell, and the end of the connecting part away from the manual operating part is connected to the traction wheel.

[0017] Further, the lever is rotatably connected to the manual operating part, and the shifting rod is rotatably connected to the connecting part;

[0018] The manual operation part is provided with a first receiving groove for receiving the lever, and the connecting part is provided with a second receiving groove for receiving the connecting rod.

[0019] Furthermore, the endoscope bending portion self-locking device further comprises a push handle cover, wherein the push handle cover covers a side of the push handle away from the housing;

[0020] The push handle cover is provided with an avoidance hole, and one end of the lever away from the connecting rod passes through the avoidance hole.

[0021] Further, a plurality of first meshing teeth arranged in sequence around the rotation axis of the traction wheel are arranged on the end surface of the traction wheel close to the friction member, and a plurality of second meshing teeth matching the tooth shape of the first meshing teeth are arranged on the end surface of the friction member close to the traction wheel;

[0022] Or, the end surface of the traction wheel close to the friction member is provided with an anti-skid protrusion or anti-skid knurling or a friction pad;

[0023] Alternatively, an anti-skid protrusion or anti-skid knurling or a friction pad is provided on the end surface of the friction member close to the traction wheel.

[0024] Furthermore, the housing comprises a shell body and a friction member fixing seat installed in the shell body; the friction member fixing seat is an annular structure, and the traction wheel shaft, the friction member and the friction member fixing seat are nested in sequence from the inside to the outside;

[0025] At least one third abutting surface is arranged on the inner circumferential surface of the friction member fixing seat, and a fourth abutting surface corresponding to the third abutting surface is arranged on the outer circumferential surface of the friction member, and the corresponding third abutting surface and fourth abutting surface abut each other.

[0026] Furthermore, the housing further comprises a reset member fixing ring, the friction member comprises a friction disc and a movable shaft connected to each other, the movable shaft, the reset member fixing ring and the friction member fixing seat are nested in sequence from the inside to the outside, and two ends of the elastic reset member are respectively in contact with the friction disc and the reset member fixing ring;

[0027] And / or, the housing further comprises an annular seal, an inner annular surface of the annular seal is sealingly fitted with the friction member, and an outer annular surface of the annular seal is sealingly fitted with the friction member fixing seat.

[0028] Furthermore, a slot is provided on the outer peripheral surface of the friction member, and one end of the shifting rod is inserted into the slot;

[0029] The clamping slot is an annular structure, and the lever is provided with an arc-shaped clamping block, which is inserted into the clamping slot.

[0030] The second object of the utility model is to provide an endoscope, comprising a bending portion, a traction rope and the endoscope bending portion self-locking device described in any one of the above items;

[0031] Two ends of the traction rope are respectively connected to the traction wheel and the bending part.

[0032] Beneficial effects of the utility model:

[0033] The utility model provides a self-locking device for a bending portion of an endoscope and an endoscope, the device comprising a shell, a traction wheel, a push handle and a self-locking assembly; wherein the traction wheel is rotatably connected in the shell; the push handle is arranged outside the shell and connected to the traction wheel; the self-locking assembly comprises a friction member, a lever and an elastic reset member, the friction member has a self-locking state abutting against the traction wheel and an unlocking state spaced from the traction wheel; the lever is rotatably connected to the push handle, and the lever is connected to the friction member; the lever is configured to rotate relative to the push handle after receiving a force, so as to pull the friction member to move to the unlocking state; the elastic reset member is used to drive the friction member to reset so as to lock in the self-locking state.

[0034] Compared with the existing self-locking device of the bending part of the endoscope, the present application realizes the switching of the friction member between the self-locking state and the unlocking state through the lever. There is almost no resistance in the process of adjusting the traction wheel. The operator only needs to apply a small force to push the traction wheel to rotate, which improves the comfort of operation and can achieve more convenient and precise adjustment. In addition, the lever is rotatably connected to the push handle. This arrangement allows the operator to easily withdraw the force applied to the lever at any time during the process of pushing the push handle, thereby further improving the adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the three-dimensional structure of an angle of the endoscope bending self-locking device provided in the first embodiment of the utility model;

[0037] Figure 2 A schematic diagram of the three-dimensional structure of the endoscope bending self-locking device provided in the first embodiment of the utility model at another angle;

[0038] Figure 3 An exploded view of the endoscope bending self-locking device provided in the first embodiment of the utility model;

[0039] Figure 4 A schematic diagram of the internal structure of the endoscope bending self-locking device provided in the first embodiment of the utility model;

[0040] Figure 5 An exploded view of a portion of the structure of the endoscope bending self-locking device provided in the first embodiment of the utility model;

[0041] Figure 6 for Figure 4 A magnified view at point A;

[0042] Figure 7 A schematic diagram of the three-dimensional structure of the friction member provided in the first embodiment of the utility model;

[0043] Figure 8 A schematic diagram of the three-dimensional structure of the friction member fixing seat provided in the first embodiment of the utility model;

[0044] Fig. 9 A schematic diagram of the three-dimensional structure of the lever provided in the first embodiment of the utility model;

[0045] Fig.10 A schematic diagram of the internal structure of the endoscope bending self-locking device provided in the second embodiment of the utility model;

[0046] Fig.11 A schematic diagram of the internal structure of the endoscope bending self-locking device provided in the third embodiment of the utility model;

[0047] Fig.12 A schematic diagram of the connection structure of the elastic reset member provided in the third embodiment of the present utility model;

[0048] Fig.13 A schematic diagram of the three-dimensional structure of an endoscope at one angle provided in the fourth embodiment of the utility model;

[0049] Fig.14 This is a schematic diagram of the three-dimensional structure of the endoscope part provided in Example 4 of the utility model.

[0050] icon:

[0051] 1-housing; 11-housing body; 12-friction member fixing seat; 121-third abutting surface; 122-internal thread; 123-step surface; 13-reset member fixing ring; 14-annular sealing member; 15-axle fixing cover; 16-limiting column;

[0052] 2-traction wheel; 21-first meshing tooth;

[0053] 3-push handle; 31-manual operation part; 311-first receiving groove; 32-connecting part; 321-limiting hole; 322-second receiving groove;

[0054] 4-self-locking assembly; 41-friction member; 411-friction disc; 4111-second meshing tooth; 4112-fourth abutting surface; 412-moving shaft; 4121-card slot; 4122-sealing slot; 42-shift lever; 421-arc-shaped card block; 422-contact protrusion; 43-elastic reset member; 44-lever; 45-connecting rod; 46-first pin shaft; 47-second pin shaft;

[0055] 5-traction wheel shaft; 51-second limiting surface;

[0056] 6- push handle cover; 61- avoidance hole;

[0057] 7- Push handle screw;

[0058] 100-Leash. DETAILED DESCRIPTION

[0059] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0060] Embodiment 1

[0061] This embodiment provides a self-locking device for the bending portion of an endoscope, referring to Figures 1 to 4 , the device comprises:

[0062] Shell 1;

[0063] A traction wheel 2 is rotatably connected to the housing 1;

[0064] A push handle 3 is arranged outside the housing 1 and connected to the traction wheel 2;

[0065] The self-locking assembly 4 includes a friction member 41, a lever 42 and an elastic reset member 43; the friction member 41 has a self-locking state in contact with the traction wheel 2 and an unlocking state spaced from the traction wheel 2; the lever 42 is rotatably connected to the push handle 3, and the lever 42 is connected to the friction member 41; the lever 42 is configured to rotate relative to the push handle after being subjected to force to pull the friction member 41 to move to the unlocking state; the elastic reset member 43 is used to drive the friction member 41 to reset so as to lock it in the self-locking state.

[0066] When the above device is in use, in the initial state, the friction member 41 is in a self-locking state abutting against the traction wheel 2, and the friction force generated by the contact between the traction wheel 2 and the friction member 41 makes it impossible for the traction wheel 2 to rotate relative to the housing 1; when the traction wheel 2 needs to rotate relative to the housing 1, the operator toggles the lever 42, and the lever 42 is rotated relative to the push handle 3 after being subjected to the force and pulls the friction member 41 in the direction away from the traction wheel 2 to an unlocking state spaced apart from the traction wheel 2. At this time, the traction wheel 2 is not affected by the friction member 41, and the operator only needs to apply a small force to push the push handle 3 to drive the traction wheel 2 to rotate relative to the housing 1; after adjusting the rotation angle of the traction wheel 2 relative to the housing 1, the lever 42 is released, and the friction member 41 is reset under the action of the elastic reset member 43 to be re-locked in the self-locking state.

[0067] After the above device is applied to the endoscope, the bending part of the endoscope and the traction wheel 2 are connected by the traction rope 100. When the angle of the bending part needs to be adjusted, the operator turns the lever 42 and rotates the push handle 3 to drive the traction wheel 2 to rotate relative to the housing 1. The traction rope 100 can be extended and retracted during the rotation of the traction wheel 2 relative to the housing 1, thereby driving the bending part to bend; when the front end of the bending part is aligned with the lesion position, the lever 42 is released, and the friction member 41 is reset to be re-locked in the self-locking state, thereby locking the angle of the bending part to prevent the front end of the bending part from rotating to other positions, which is convenient for surgery and the use of instruments.

[0068] Compared with the existing self-locking device of the bending part of the endoscope, the present application realizes the switching of the friction member 41 between the self-locking state and the unlocking state through the lever 42. There is almost no resistance in the process of adjusting the traction wheel 2. The operator only needs to apply a small force to push the traction wheel 2 to rotate, which improves the comfort of operation and enables more convenient and precise adjustment. In addition, the lever 42 is rotatably connected to the push handle 3. This arrangement allows the operator to easily cancel the force applied to the lever 42 at any time during the process of pushing the push handle 3, thereby further improving the adjustment accuracy.

[0069] Reference Figure 3 and Figure 4 The endoscope bending portion self-locking device provided in the present application further includes a traction wheel shaft 5 rotatably connected to the housing 1, and the traction wheel 2 is mounted on the traction wheel shaft 5. Optionally, the traction wheel 2 and the traction wheel shaft 5 are integrally formed; or, the traction wheel 2 and the traction wheel shaft 5 are connected by other connection methods, such as: glue connection, thread connection, keyway connection, welding and other connection methods.

[0070] On the basis of the above structure, one end of the traction wheel shaft 5 passes through the housing 1 and is connected to the push handle 3. Optionally, the traction wheel shaft 5 and the push handle 3 are integrally formed; or, the traction wheel shaft 5 and the push handle 3 are connected by other connection methods, such as: glue connection, thread connection, keyway connection, welding and the like.

[0071] Reference Figure 4 and Figure 5 In this embodiment, the traction wheel 2 and the traction wheel shaft 5 are integrally formed, and one end of the traction wheel shaft 5 passing through the housing 1 is detachably connected to the push handle 3. A limiting hole 321 is provided on the push handle 3, and one end of the traction wheel shaft 5 passes through the housing 1 and is inserted into the limiting hole 321 to prevent the traction wheel shaft 5 from rotating relative to the push handle 3. Further, at least one first limiting surface is provided on the inner circumference of the limiting hole 321, and a second limiting surface 51 corresponding to the first limiting surface is provided on the outer circumference of the traction wheel shaft 5. The correspondingly provided first limiting surface and the second limiting surface 51 abut against each other to prevent the traction wheel shaft 5 from rotating relative to the push handle 3.

[0072] Exemplarily, the cross-sectional profile of the limiting hole 321 is a first polygon (e.g., a quadrilateral, a pentagon, a hexagon, etc.), and a plane corresponding to each side of the first polygon is a first limiting surface; correspondingly, the cross-sectional outer profile of the partial structure of the traction wheel shaft 5 inserted into the limiting hole 321 is a second polygon that is compatible with the limiting hole 321, and a plane corresponding to each side of the second polygon is a second limiting surface 51.

[0073] Continue to refer to Figure 4 and Figure 5 The endoscope bending portion self-locking device further comprises a push handle cover 6 and a push handle screw 7; wherein the push handle cover 6 covers the side of the push handle 3 away from the housing 1; further referring to Figure 6 The threaded shaft of the push handle screw 7 passes through the push handle cover 6 and is screwed to the end surface of the traction wheel shaft 5, and part of the push handle cover 6 is clamped and fixed between the traction wheel shaft 5 and the nut of the push handle screw 7; after one end of the traction wheel shaft 5 is inserted into the limiting hole 321 on the push handle 3, part of the push handle 3 is clamped and fixed between the shoulder of the traction wheel shaft 5 and the push handle cover 6, and at the same time, the push handle 3 and the traction wheel shaft 5 can be limited to rotate relative to each other through the first limiting surface and the second limiting surface 51. The above arrangement enables the push handle 3, the traction wheel shaft 5 and the push handle cover 6 to move synchronously.

[0074] Continue to refer to Figure 4 and Figure 5 The self-locking assembly 4 further includes a lever 44 and a connecting rod 45, wherein the lever 44 is rotatably connected to the push handle 3, and the two ends of the connecting rod 45 are respectively hinged to the lever 42 and the lever 44. When in use, pressing the lever 44 can drive the connecting rod 45 to move, thereby driving the lever 42 to rotate relative to the push handle 3.

[0075] As an optional embodiment, the connecting rod 45 can be a flexible structure; illustratively, the connecting rod 45 is a metal rope such as a steel wire rope, iron wire, etc.; the connecting rod 45 can also be a non-metallic rope such as a cotton and linen material. Among them, the steel wire rope has the advantages of low cost and wear resistance, so the connecting rod 45 preferably uses a steel wire rope. It should be noted that the connecting rod 45 made of soft material has the characteristics of being bendable and foldable, so the two ends of the connecting rod 45 of such material can be rotatably connected to the lever 42 and the lever 44 respectively, or can be directly fixed on the lever 42 and the lever 44, and the hinge connection with the lever 42 and the lever 44 is achieved through the soft characteristics of the connecting rod 45 itself.

[0076] As another optional embodiment, the connecting rod 45 may be a rigid structure; illustratively, the connecting rod 45 may be made of steel, hard plastic or other materials.

[0077] Continue to refer to Figure 4 and Figure 5 The push handle 3 is L-shaped and includes a manual operating portion 31 and a connecting portion 32 connected to each other;

[0078] The manual operating portion 31 is located at the periphery of the housing 1, and the length direction of the manual operating portion 31 is substantially parallel to the rotation axis of the traction wheel 2; the connecting portion 32 is located at one end of the housing 1, and the end of the connecting portion 32 away from the manual operating portion 31 is connected to the traction wheel 2. In this embodiment, the limiting hole 321 is provided through the end of the connecting portion 32 away from the manual operating portion 31.

[0079] On the basis of the above structure, the lever 44 is rotatably connected to the manual operation part 31, and the lever 42 is rotatably connected to the connection part 32;

[0080] The manual operation portion 31 is provided with a first receiving groove 311 for receiving the lever 44 , and the connecting portion 32 is provided with a second receiving groove 322 for receiving the connecting rod 45 .

[0081] Specifically, the self-locking component 4 also includes a first pin shaft 46 and a second pin shaft 47; wherein, the first pin shaft 46 passes through the lever 44 and the two ends of the first pin shaft 46 are respectively connected to the two side walls of the first accommodating groove 311; the second pin shaft 47 passes through the lever 42 and the two ends of the second pin shaft 47 are respectively connected to the two side walls of the second accommodating groove 322; the lever 44 and the lever 42 are respectively rotatably connected to the push handle 3 through the first pin shaft 46 and the second pin shaft 47.

[0082] Continue to refer to Figure 4 and Figure 5 The push handle cover 6 is provided with an escape hole 61, and one end of the lever 44 away from the connecting rod 45 passes through the escape hole 61. Specifically, the first pin 46 is located at the middle position of the lever 44 along the length direction, one end of the lever 44 along the length direction is hinged to one end of the connecting rod 45, and the other end of the lever 44 along the length direction is the operating position, and the operating position of the lever 44 passes through the escape hole 61; when in use, the operator indirectly moves the lever 42 by pressing the operating position of the lever 44, thereby releasing the self-locking of the device.

[0083] When the above device is in use, the operator holds the housing 1 and uses his thumb to press the part of the structure where the lever 44 extends from the push handle cover 6. The lever 44 is forced to drive the lever 42 to rotate, thereby releasing the self-locking of the device; then, the thumb remains in the pressed state and pushes the push handle 3 and the push handle cover 6 forward or backward, while driving the traction wheel 2 to rotate, thereby adjusting the angle of the traction wheel 2. During the adjustment process, the device can be restored to the self-locking state by lifting the thumb, achieving the effect of switching the self-locking state and releasing the self-locking state at any time, making the adjustment of the angle of the traction wheel 2 more convenient and accurate. As can be seen from the above operation process, the present application can be operated with one hand, which is more convenient for operators to use.

[0084] Reference Figure 6 and Figure 7A plurality of first meshing teeth 21 arranged in sequence around the rotation axis of the traction wheel 2 are arranged on the end surface of the traction wheel 2 close to the friction member 41, and a plurality of second meshing teeth 4111 matching the tooth shape of the first meshing teeth 21 are arranged on the end surface of the friction member 41 close to the traction wheel 2;

[0085] Or, an anti-skid protrusion or anti-skid knurling or friction pad is provided on the end surface of the traction wheel 2 close to the friction member 41;

[0086] Alternatively, an anti-skid protrusion or anti-skid knurling or friction pad is provided on the end surface of the friction member 41 close to the traction wheel 2.

[0087] The above configurations can increase the frictional force generated when the traction wheel 2 and the friction member 41 are in contact, ensuring that the traction wheel 2 does not move in the self-locking state. In the above configurations, the frictional force generated by the meshing of the teeth is relatively large, so it is preferred to provide the first meshing teeth 21 on the traction wheel 2 and the second meshing teeth 4111 on the friction member 41.

[0088] Reference Figures 6 to 8 The housing 1 includes a housing body 11 and a friction member fixing seat 12 installed in the housing body 11; the friction member fixing seat 12 is an annular structure, and the traction wheel shaft 5, the friction member 41 and the friction member fixing seat 12 are nested in sequence from the inside to the outside;

[0089] At least one third abutting surface 121 is arranged on the inner circumference of the friction member fixing seat 12, and a fourth abutting surface 4112 is arranged on the outer circumference of the friction member 41, which is arranged corresponding to the third abutting surface 121. The corresponding third abutting surface 121 and the fourth abutting surface 4112 abut against each other. The third abutting surface 121 and the fourth abutting surface 4112 can limit the relative rotation between the friction member fixing seat 12 and the friction member 41, so that the friction member 41 can only move in the axial direction, that is, the friction member 41 can only move in the direction close to or away from the traction wheel 2.

[0090] In other embodiments, the friction member fixing seat 12 may not be provided (in other words, the shell body 11 and the friction member fixing seat 12 may be integrally formed); in this embodiment, a step hole is provided through an end plate of the shell 1, a third abutting surface 121 is provided on the inner circumferential surface of the step hole, and the friction member 41 is slidably provided in the step hole.

[0091] Furthermore, the housing 1 further includes a reset member fixing ring 13, and the friction member 41 includes a friction disc 411 and a movable shaft 412 connected to each other. The movable shaft 412, the reset member fixing ring 13, and the friction member fixing seat 12 are nested in sequence from the inside to the outside, and the two ends of the elastic reset member 43 are respectively in contact with the friction disc 411 and the reset member fixing ring 13. In this embodiment, the elastic reset member 43 is specifically a compression spring, which is sleeved on the movable shaft 412, and the two ends of the compression spring are respectively in contact with the friction disc 411 and the reset member fixing ring 13.

[0092] Reference Figure 8 An internal thread 122 is provided on the inner circumferential surface of the friction member fixing seat 12 , and the reset member fixing ring 13 is screwed into the friction member fixing seat 12 through the internal thread 122 .

[0093] In other embodiments, the housing body 11 , the friction member fixing seat 12 and the reset member fixing ring 13 may be integrally formed.

[0094] Continue to refer to Figure 6 The housing 1 further comprises an annular seal 14, the inner annular surface of the annular seal 14 is sealed with the friction member 41, and the outer annular surface of the annular seal 14 is sealed with the friction member fixing seat 12. The annular seal 14 is made of sealing material such as rubber.

[0095] Specific reference Figure 7 The outer peripheral surface of the friction member 41 (specifically the moving shaft 412) is provided with an annular sealing groove 4122, and the inner ring edge portion of the annular sealing member 14 is inserted into the sealing groove 4122; Figure 8 The outer ring edge of the annular seal 14 is clamped between the step surface 123 on the friction member fixing seat 12 and the reset member fixing ring 13. The annular seal 14 is arranged at the opening position of the housing 1, and the annular seal 14 can prevent external dust and other impurities from entering the housing 1.

[0096] Reference Figure 7 and Fig. 9 A slot 4121 is provided on the outer circumference of the friction member 41, and one end of the lever 42 is inserted into the slot 4121; in this embodiment, the slot 4121 is an annular structure, and an arc-shaped block 421 is provided on the lever 42, and the arc-shaped block 421 is inserted into the slot 4121; two ends of the arc-shaped block 421 are respectively provided with a contact protrusion 422, and the contact protrusion 422 can contact the side wall of the slot 4121. When the lever 42 rotates relative to the push handle 3 around the second pin 47, the contact protrusion 422 contacts the side wall of the slot 4121 and pushes the friction member 41 to move in a direction away from the traction wheel 2.

[0097] Reference Figure 2 and Figure 4In this embodiment, the housing 1 further comprises an axle fixing cover 15, which is fixedly connected to the housing body 11 through a plurality of limiting columns 16; the traction wheel 2 is arranged inside the housing body 11 and is located between the axle fixing cover 15 and the friction member fixing seat 12; one end of the traction wheel shaft 5 passes through the axle fixing cover 15 and is fixed by a nut; the traction wheel shaft 5, the friction member 41 and the friction member fixing seat 12 are nested in sequence from the inside to the outside, and the other end of the traction wheel shaft 5 passes through the friction member 41 (and also passes through the friction member fixing seat 12) and is fixedly connected to the push handle 3; the friction member 41 comprises an integrally formed friction disc 411 and a movable shaft 412, and the friction disc 411, the elastic reset member 43, the reset member fixing ring 13 and the annular seal 14 are sequentially sleeved on the movable shaft 412 in a direction away from the traction wheel 2, wherein the reset member fixing ring 13 is screwed on the friction member fixing seat 12, and the annular seal 14 is used for sealing at the opening of the housing 1. In the above structure, pushing the lever 42 can drive the friction member 41 to move in a direction away from the traction wheel shaft 5, and pushing the push handle 3 can drive the traction wheel shaft 5 and the traction wheel 2 on the traction wheel shaft 5 to rotate around the axis of the traction wheel shaft 5 relative to the housing 1.

[0098] Embodiment 2

[0099] This embodiment provides a self-locking device for the bending portion of an endoscope, which is different from the device in the first embodiment in that the lever 44 and the connecting rod 45 are not provided in this embodiment.

[0100] Reference Fig.10 In this embodiment, one end of the lever 42 is inserted into the slot 4121, and the other end of the lever 42 passes through the avoidance hole 61 on the push handle cover 6. In this embodiment, the state of the friction member 41 can be switched by directly moving the lever 42, and parts such as the lever 44 and the connecting rod 45 can be omitted, thereby simplifying the device structure and facilitating processing and assembly. Compared with the first embodiment, the disadvantage of this embodiment is that it is not very convenient for the operator to perform one-handed operation.

[0101] The rest of the structure of this embodiment is the same as that of the first embodiment and will not be described again.

[0102] Embodiment 3

[0103] This embodiment provides a self-locking device for the bending portion of an endoscope, which is different from the device described in the first embodiment in that the elastic reset member 43 in this embodiment is configured as a torsion spring.

[0104] Reference Fig.11 and Fig.12In this embodiment, a torsion spring installation groove is recessed on one side of the lever 44, a first torsion spring connection hole is provided at the bottom of the torsion spring installation groove, the push handle 3 covers the opening of the torsion spring installation groove, and a second torsion spring connection hole is provided on the push handle 3; the elastic reset member 43 (torsion spring) is provided in the torsion spring installation hole and sleeved on the first pin 46, and the connecting rods at both ends of the torsion spring are respectively inserted into the first torsion spring connection hole and the second torsion spring connection hole. In this embodiment, the connecting rod 45 is a rigid structure; the torsion spring can drive the lever 44 to rotate counterclockwise around the first pin 46, drive the connecting rod 45 to move downward, and the connecting rod 45 drives the lever 42 to rotate counterclockwise around the second pin 47, and the lever 42 pushes the slot wall on the left side of the slot 4121 to move in the direction close to the traction wheel 2 during the rotation process.

[0105] In other embodiments, the torsion spring may also be sleeved on the second pin 47 , and the two connecting rods of the torsion spring are respectively connected to the shifting rod 42 and the push handle 3 .

[0106] In addition, the elastic reset member 43 can also be a permanent magnet; illustratively, a permanent magnet is provided on the end face of the traction wheel 2 close to the friction member 41, and the friction member 41 moves toward the direction close to the traction wheel 2 under the magnetic force of the permanent magnet. The magnetic force of the permanent magnet keeps the device in a self-locking state without being affected by external forces.

[0107] Embodiment 4

[0108] Reference Fig.13 and Fig.14 , this embodiment provides an endoscope, the endoscope comprising a bending portion, a traction rope 100 and an endoscope bending portion self-locking device of any of the above embodiments;

[0109] Both ends of the traction rope 100 are connected to the traction wheel 2 and the curved portion respectively.

[0110] Combination Figure 3 One end of the traction rope 100 is specifically wound around and fixed on the circumferential surface of the traction wheel 2.

[0111] When the angle of the bending portion needs to be adjusted, the operator pushes the lever 42 and rotates the push handle 3 to drive the traction wheel 2 to rotate relative to the shell 1. The traction rope 100 can be extended and retracted during the rotation of the traction wheel 2 relative to the shell 1, thereby driving the bending portion to bend; when the front end of the bending portion is aligned with the lesion position, the lever 42 is released, and the friction member 41 is reset to be re-locked in the self-locking state, thereby locking the angle of the bending portion to prevent the front end of the bending portion from rotating to other positions, thereby facilitating surgery and the use of instruments.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A self-locking device for a bending portion of an endoscope, characterized in that: include: Housing (1); A traction wheel (2) rotatably connected to the housing (1); A push handle (3) is arranged outside the housing (1) and connected to the traction wheel (2); The self-locking assembly (4) comprises a friction member (41), a lever (42) and an elastic reset member (43); the friction member (41) has a self-locking state in contact with the traction wheel (2) and an unlocking state spaced from the traction wheel (2); the lever (42) is rotatably connected to the push handle (3), and the lever (42) is connected to the friction member (41); the lever (42) is configured to be able to rotate relative to the push handle (3) after receiving a force, so as to pull the friction member (41) to move to the unlocking state; the elastic reset member (43) is used to drive the friction member (41) to reset so as to lock in the self-locking state.

2. The endoscope bending portion self-locking device according to claim 1, characterized in that: It also comprises a traction wheel shaft (5) rotatably connected to the housing (1), the traction wheel (2) being mounted on the traction wheel shaft (5); a limiting hole (321) is provided on the push handle (3), one end of the traction wheel shaft (5) passes through the housing (1) and is inserted into the limiting hole (321) to prevent the traction wheel shaft (5) from rotating relative to the push handle (3); Furthermore, at least one first limiting surface is arranged on the inner circumference of the limiting hole (321), and a second limiting surface (51) corresponding to the first limiting surface is arranged on the outer circumference of the traction wheel shaft (5), and the correspondingly arranged first limiting surface and second limiting surface (51) abut against each other to prevent the traction wheel shaft (5) from rotating relative to the push handle (3).

3. The endoscope bending portion self-locking device according to claim 1, characterized in that: The self-locking assembly (4) further comprises a lever (44) and a connecting rod (45), wherein the lever (44) is rotatably connected to the push handle (3), and the two ends of the connecting rod (45) are respectively hinged to the shifting rod (42) and the lever (44); The connecting rod (45) is a flexible structure or a rigid structure.

4. The endoscope bending portion self-locking device according to claim 3, characterized in that: The push handle (3) is L-shaped and comprises a manual operating portion (31) and a connecting portion (32) connected to each other; The manual operating portion (31) is located at the periphery of the housing (1), and the length direction of the manual operating portion (31) is substantially parallel to the rotation axis of the traction wheel (2); the connecting portion (32) is located at one end of the housing (1), and the end of the connecting portion (32) away from the manual operating portion (31) is connected to the traction wheel (2).

5. The endoscope bending portion self-locking device according to claim 4, characterized in that: The lever (44) is rotatably connected to the manual operating portion (31), and the shifting rod (42) is rotatably connected to the connecting portion (32); The manual operation portion (31) is provided with a first accommodating groove (311) for accommodating the lever (44), and the connecting portion (32) is provided with a second accommodating groove (322) for accommodating the connecting rod (45).

6. The endoscope bending portion self-locking device according to claim 5, characterized in that: The endoscope bending portion self-locking device further comprises a push handle cover (6), wherein the push handle cover (6) covers a side of the push handle (3) away from the housing (1); The push handle cover (6) is provided with an avoidance hole (61), and one end of the lever (44) away from the connecting rod (45) passes through the avoidance hole (61).

7. The endoscope bending portion self-locking device according to claim 1, characterized in that: A plurality of first meshing teeth (21) arranged in sequence around the rotation axis of the traction wheel (2) are arranged on the end surface of the traction wheel (2) close to the friction member (41); a plurality of second meshing teeth (4111) matching the tooth shape of the first meshing teeth (21) are arranged on the end surface of the friction member (41) close to the traction wheel (2); Or, the end surface of the traction wheel (2) close to the friction member (41) is provided with an anti-skid protrusion or an anti-skid knurling or a friction pad; Alternatively, an anti-skid protrusion or anti-skid knurling or a friction pad is provided on the end surface of the friction member (41) close to the traction wheel (2).

8. The endoscope bending portion self-locking device according to claim 2, characterized in that: The housing (1) comprises a shell body (11) and a friction member fixing seat (12) installed in the shell body (11); the friction member fixing seat (12) is an annular structure, and the traction wheel shaft (5), the friction member (41) and the friction member fixing seat (12) are nested in sequence from the inside to the outside; At least one third abutting surface (121) is arranged on the inner circumferential surface of the friction member fixing seat (12), and a fourth abutting surface (4112) corresponding to the third abutting surface (121) is arranged on the outer circumferential surface of the friction member (41), and the correspondingly arranged third abutting surface (121) and fourth abutting surface (4112) abut against each other.

9. The endoscope bending portion self-locking device according to claim 8, characterized in that: The housing (1) further comprises a reset member fixing ring (13); the friction member (41) comprises a friction disk (411) and a movable shaft (412) connected to each other; the movable shaft (412), the reset member fixing ring (13) and the friction member fixing seat (12) are nested in sequence from the inside to the outside; and two ends of the elastic reset member (43) are respectively in contact with the friction disk (411) and the reset member fixing ring (13); And / or, the housing (1) further comprises an annular seal (14), the inner annular surface of the annular seal (14) being sealingly fitted to the friction member (41), and the outer annular surface of the annular seal (14) being sealingly fitted to the friction member fixing seat (12).

10. The endoscope bending portion self-locking device according to any one of claims 1 to 9, characterized in that: A clamping groove (4121) is provided on the outer peripheral surface of the friction member (41), and one end of the shifting rod (42) is inserted into the clamping groove (4121); the clamping groove (4121) is an annular structure, and an arc-shaped clamping block (421) is provided on the shifting rod (42), and the arc-shaped clamping block (421) is inserted into the clamping groove (4121).

11. An endoscope, characterized in that: It comprises a bending portion, a traction rope (100) and the endoscope bending portion self-locking device according to any one of claims 1 to 10; Two ends of the traction rope (100) are respectively connected to the traction wheel (2) and the curved portion.

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