Mucous membrane incision knife with knife head locking structure

Abstract

The utility model relates to the technical field of medical instruments, in particular to a mucous membrane incision knife with a knife head locking structure, which comprises a handle main body, a knife head component and a slide knob integrated piece, an installation cavity is formed in the handle main body, and at least two clamping grooves communicated with the installation cavity are concavely formed on the inner peripheral wall of the handle main body. The rod body is arranged in the mounting cavity in a sliding and penetrating mode, the front end of the rod body is connected with the knife wire, the sliding knob protrudes upwards from the rod body and extends out of the handle body, the connecting part is connected between the rod body and the sliding knob, and the connecting part protrudes to form a clamping boss which is used for being matched with the clamping groove and can move up and down. The clamping groove on the handle is matched with the clamping boss capable of moving up and down on the sliding knob integrated piece to lock the knife outlet state and the knife collecting state of the knife wire, an operator does not need to abut against a control component of the knife wire all the time in the operation process, the fatigue degree of the operator is reduced, and therefore the operation efficiency and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a mucosal cutting knife with a cutter head locking structure. Background Technique

[0002] The disposable mucosal cutting knife is a minimally invasive surgical instrument, commonly used for the curative resection of superficial lesions in the patient's digestive tract, such as the resection of submucosal tumors in the digestive tract. Its basic principle is to use high-frequency current to generate heat on the cutter head of the surgical knife. Through the action of heat, the tissue is heated above the protein coagulation point, the cell protein is denatured and coagulated, and the surrounding tissue fluid is coagulated into a firm gel, so as to achieve the effects of cutting, coagulating and hemostasis. Usually, after the curative resection treatment with the mucosal cutting knife, it has the advantages of small trauma, no change in the digestive tract structure, avoidance of surgical risks and reduction of the decline in the quality of life after surgery; at the same time, the patient can accept multiple treatments at multiple sites, and enable the doctor to obtain complete tissue pathological specimens for analysis; for tumors with a large area, irregular shape or combined with ulcers and scars, the resection rate is more than 96%, so as to reduce the recurrence probability.

[0003] During the operation, the operator first needs to send the cutting knife into the patient's body through the forceps channel of the endoscope. At this time, the operator needs to apply a force to the control component to keep the cutter head in the retracted state to prevent the cutter head from accidentally protruding and causing injury to the patient. When cutting, the cutter head protrudes. At this time, a force needs to be applied to the control component to keep the cutter head in the cutting state to prevent it from retracting. Therefore, during the operation, the operator needs to apply force to the control component at all times, resulting in a high fatigue degree of the operator, and thus reducing the operation efficiency and accuracy. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: to solve the problem that in the prior art, the operator needs to apply force to the control component at all times during the operation of the cutting knife, resulting in a high fatigue degree of the operator, and thus reducing the operation efficiency and accuracy. Now, a mucosal cutting knife with a cutter head locking structure is provided.

[0005] To solve the above technical problem, the utility model adopts the following technical scheme: a mucosal cutting knife with a cutter head locking structure, comprising:

[0006] A handle main body, which forms an installation cavity inside, and at least two clamping grooves communicating with the installation cavity are recessed on its inner peripheral wall;

[0007] A cutter head assembly, including an outer sheath tube and a cutter wire that can protrude or retract from the outer sheath tube;

[0008] The slider-integrated component includes a rod body slidably inserted into the installation cavity with its front end connected to the wire knife, a slider protruding upward from the rod body and extending out of the handle body, and a connecting part connected between the two. A clamping boss is formed on the protruding connecting part for cooperating with the clamping groove and capable of moving up and down.

[0009] When the slider is pressed, the clamping boss can move downward from the clamping groove into the installation cavity to release the locking of the wire knife; when the pressing is released, the clamping boss can move upward from the installation cavity into the clamping groove to lock the wire knife.

[0010] Furthermore, there are two clamping grooves, one is a wire-out clamping groove and the other is a wire-in clamping groove. A chute that is not connected to the two and is connected to the installation cavity is provided between the two.

[0011] Furthermore, an elastic deformation groove for enabling the clamping boss to move up and down is formed in the part of the connecting part below the clamping boss.

[0012] Furthermore, the width of the elastic deformation groove is greater than the width of the connecting part, so that the upper groove wall of the elastic deformation groove protrudes from the connecting part to both sides to form supporting cantilevers.

[0013] Furthermore, a limiting part for restricting the maximum downward movement distance of the clamping boss protrudes upward from the bottom of the elastic deformation groove.

[0014] Furthermore, a V-shaped platform is recessed on the upper surface of the front end of the rod body, and a through groove is formed inside the limiting part and the limiting part is erected on the V-shaped platform.

[0015] Furthermore, several support beams are protruded from the inner wall of the installation cavity at intervals for supporting the slider-integrated component.

[0016] Furthermore, an electrode seat for fixing an electrode plug is provided at the rear end of the rod body.

[0017] Furthermore, the electrode seat includes a seat body and a cover body that are snap-connected, and the two enclose an electrode cavity for installing the electrode plug. A positioning groove for positioning the electrode plug and an orientation groove for orienting the electrode plug are provided in the electrode cavity.

[0018] Furthermore, a hanging hole is provided at the rear end of the rod body. The hanging hole retracts into the handle body during wire-out and extends backward out of the handle body for hanging during wire-in.

[0019] The beneficial effects of the present utility model: The present utility model uses the clamping groove on the handle and the clamping boss that can move up and down on the slider-integrated component to cooperate to lock the wire-out state and wire-in state of the wire knife, eliminating the need for the operator to constantly hold the control component of the wire knife during the operation, reducing the fatigue degree of the operator, and thus improving the operation efficiency and accuracy. Brief Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the internal structure of the present utility model in a free-sliding state (at this time, the clamping boss is engaged with the chute);

[0022] Figure 2 It is a schematic diagram of the internal structure of the present utility model in a locked state (at this time, the clamping boss is engaged with the knife-receiving slot);

[0023] Figure 3 is Figure 2 A sectional view taken along the A-A direction in

[0024] Figure 4 It is a schematic diagram of the structure of the sliding button integral part;

[0025] Figure 5 It is a schematic diagram of the structure of the electrode base after removing the cover;

[0026] Figure 6 It is a schematic diagram of the structure of the cover;

[0027] Figure 7 It is a schematic diagram of the structure of the handle main body;

[0028] Figure 8 It is a schematic diagram of the structure of the present utility model in the knife-receiving state;

[0029] Figure 9 It is a schematic diagram of the structure of the present utility model in a free-sliding state;

[0030] Figure 10 It is a schematic diagram of the structure of the present utility model in the knife-out state;

[0031] In the figure:

[0032] 1. Handle main body; 101. Installation cavity; 102. Knife-out slot; 103. Knife-receiving slot; 104. Chute; 105. Support beam;

[0033] 2. Knife head assembly; 201. Outer sheath tube; 202. Knife wire;

[0034] 3. Sliding button integral part; 301. Rod body; 3011. V-shaped platform; 302. Sliding button; 303. Connecting part; 304. Clamping boss; 305. Elastic deformation groove; 306. Support cantilever; 307. Limiting part; 3071. Through groove; 308. Electrode base; 3081. Positioning groove; 3082. Orientation groove; 3083. Seat body; 3084. Cover; 309. Electrode plug; 310. Hanging hole. Detailed Description of the Preferred Embodiments

[0035] The present utility model will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model, and directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalents.

[0036] Embodiment 1:

[0037] As Figures 1-4 shown, a mucosal incision knife with a blade locking structure includes:

[0038] A handle body 1, which forms an installation cavity 101 therein, and at least two card slots communicating with the installation cavity 101 are recessed on its inner peripheral wall, and the card slots are arranged at intervals;

[0039] A blade assembly 2, including an outer sheath tube 201 and a wire blade 202 that can extend or retract from the outer sheath tube 201. The outer sheath tube 201 is connected to the handle body 1. When the wire blade 202 extends out of the outer sheath tube 201, it is in the blade-out state, and when the wire blade 202 retracts into the outer sheath tube 201, it is in the blade-retracted state;

[0040] And a slider integral part 3, including a rod body 301 slidably passing through the installation cavity 101 and connected to the wire blade 202 through an inner tube at the front end, a slider 302 protruding upward from the rod body 301 and extending out of the handle body 1, and a connecting part 303 connecting the two. A positioning boss 304 for cooperating with the card slot and capable of moving up and down is protruded on the connecting part 303; the upper surface of the slider 302 matches the shape of the thumb, and a plurality of anti-slip protrusions are arranged at intervals on its upper surface to increase the friction between the thumb and the slider 302. A plurality of reinforcing ribs are provided between the slider 302 and the connecting part 303, as Figure 4 shown.

[0041] When the slider 302 is pressed, the positioning boss 304 can move down from the card slot into the installation cavity 101 to release the locking of the wire blade 202. At this time, when the slider 302 is pushed, the slider 302 can drive the wire blade 202 to move back and forth through the rod body 301; when the pressing is released, the positioning boss 304 can move up from the installation cavity 101 into the card slot to lock the wire blade 202, eliminating the need for the operator to constantly hold the control part of the wire blade 202 during the operation, reducing the fatigue degree of the operator, and thus improving the operation efficiency and accuracy.

[0042] In some examples, there are two card slots, one of which is the knife - out card slot 102 and the other is the knife - in card slot 103. The knife - out card slot 102 is located at the front end of the knife - in card slot 103. A chute 104 that is not connected to either of them and is connected to the installation cavity 101 is provided between the knife - out card slot 102 and the knife - in card slot 103. The positioning boss 304 can move back and forth in the chute 104 to switch between knife - out and knife - in operations. The mutually adjacent and close - to - each - other groove walls of the knife - out card slot 102, the chute 104, and the knife - in card slot 103 are all inclined downward toward each other from top to bottom to form guiding inclined surfaces, which is conducive to the positioning boss 304 sliding into or out of the knife - out card slot 102, the chute 104, and the knife - in card slot 103.

[0043] When pushing and pulling the sliding button 302 to slide the positioning boss 304 to the rear end of the chute 104, pressing the sliding button 302 causes the sliding button 302 to drive the positioning boss 304 to move downward into the installation cavity 101. Then, releasing the pressing, the positioning boss 304 resets and snaps into the knife - in card slot 103. At this time, it is in the knife - in state, and the wire 202 retracts into the outer sheath tube 201.

[0044] When pushing and pulling the sliding button 302 to slide the positioning boss 304 to the front end of the chute 104, pressing the sliding button 302 causes the sliding button 302 to drive the positioning boss 304 to move downward into the installation cavity 101. Then, releasing the pressing, the positioning boss 304 resets and snaps into the knife - out card slot 102. At this time, it is in the knife - out state, and the wire 202 extends out of the outer sheath tube 201.

[0045] In some examples, an elastic deformation groove 305 for enabling the positioning boss 304 to move up and down is provided at the part of the connecting portion 303 below the positioning boss 304. When pressing the sliding button 302 (i.e., applying a downward force to the sliding button 302), the elastic deformation groove 305 can be deformed by the force, enabling the positioning boss 304 to have a downward movement space, so as to enter the installation cavity 101. After removing the pressing, the elastic deformation groove 305 resets and can drive the positioning boss 304 to reset and enter the card slot to achieve locking.

[0046] In some examples, the groove width of the elastic deformation groove 305 (i.e., the distance that the elastic deformation groove 305 extends along the length direction of the rod body 301) is greater than the width of the connecting portion 303 (i.e., the distance that the connecting portion 303 extends along the length direction of the rod body 301), so that the upper groove wall of the elastic deformation groove 305 protrudes from both sides of the connecting portion 303 to form a support cantilever 306. The elastic deformation groove 305 with a larger width is more likely to be deformed, enabling the positioning boss 304 to obtain a downward displacement, thereby reducing the force applied to the sliding button 302 and achieving the effect of saving effort.

[0047] In some examples, a limiting portion 307 that protrudes upward from the bottom of the elastic deformation groove 305 is used to limit the maximum downward movement distance of the clamping boss 304; when the upper groove wall of the elastic deformation groove 305 abuts against the limiting portion 307, this is the maximum distance of downward movement of the clamping boss 304.

[0048] In some examples, a V-shaped platform 3011 is formed by a depression on the upper surface of the front end of the rod body 301. The limiting portion 307 is generally trapezoidal in shape and has a through groove 3071 formed inside. The two waists of the limiting portion 307 are inclined and are respectively supported on the two inclined portions of the V-shaped platform 3011. The setting of the through groove 3071 enables the limiting portion 307 to have a certain elasticity.

[0049] In some examples, a plurality of support beams 105 that are spaced apart and used to support the slide button assembly 3 protrude from the inner wall of the installation cavity 101. The support beams 105 provide a certain height for the slide button assembly 3 so that the clamping boss 304 can enter or disengage from the card slot during up and down displacement, as Figure 7 shown.

[0050] In some examples, an electrode seat 308 for fixing the electrode plug 309 is provided at the rear end of the rod body 301, which can prevent the electrode plug 309 from loosening.

[0051] In some examples, the electrode seat 308 includes a seat body 3083 and a cover body 3084 that are snap-connected. The two enclose to form an electrode cavity for installing the electrode plug 309. A positioning groove 3081 for positioning the electrode plug 309 and an orientation groove 3082 for orienting the electrode plug 309 are provided in the electrode cavity. The positioning groove 3081 is for the neck on the electrode plug 309 to be inserted. The cross-sectional area of the neck is smaller than the cross-sectional area of the rest of the electrode plug 309. Therefore, the electrode plug 309 can be positioned through the cooperation of the neck and the positioning groove 3081. One side wall of the orientation groove 3082 is a plane, and its cooperation with the plane on the electrode plug 309 can orient the electrode plug 309, as Figure 5 and Figure 6 shown.

[0052] In some examples, a hanging hole 310 is provided at the rear end of the rod body 301. The hanging hole 310 is generally in a butterfly shape. The hanging hole 310 retracts into the handle main body 1 when the knife is drawn, avoiding dragging with other instruments when the cutting knife is used, and extends backward out of the handle main body 1 for hanging when the knife is retracted.

[0053] Working principle;

[0054] As Figure 8 shown, in the initial state, the clamping boss 304 is located inside the knife retraction card slot 103. At this time, it is in the knife retraction state, and the wire 202 is retracted inside the outer sheath tube 201;

[0055] As Figure 9 shown, when the sliding button 302 is pressed, the sliding button 302 drives the clamping boss 304 to move downward into the installation cavity 101, and then the pressing is released. The clamping boss 304 enters the sliding groove 104 and moves along the sliding groove 104. At this time, the cutting wire 202 is in a free state and can move back and forth;

[0056] As Figure 10 shown, when the sliding button 302 is pushed and pulled so that the clamping boss 304 slides to the front end of the sliding groove 104, the sliding button 302 is pressed. The sliding button 302 drives the clamping boss 304 to move downward into the installation cavity 101, and then the pressing is released. The clamping boss 304 is clamped into the knife-out card slot 102. At this time, it is in the knife-out state, and the cutting wire 202 extends out of the outer sheath tube 201.

[0057] Taking the ideal embodiments of the present invention as the above inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A mucosal incision knife with a cutter head locking structure, characterized in that: Comprising: A handle body (1) having an installation cavity (101) formed therein, and at least two card slots formed by recessing the inner peripheral wall thereof and communicating with the installation cavity (101); A cutter head assembly (2) including an outer sheath tube (201) and a cutter wire (202) that can extend or retract from the outer sheath tube (201); And a slide button integrated part (3) including a rod body (301) slidably disposed in the installation cavity (101) and having a front end connected to the cutter wire (202), a slide button (302) protruding upward from the rod body (301) and extending out of the handle body (1), and a connecting portion (303) connecting the two. A clamping position boss (304) for cooperating with the card slot and capable of moving up and down is formed on the protruding connecting portion (303); When the slide button (302) is pressed, the clamping position boss (304) can move downward from the card slot into the installation cavity (101) to release the locking of the cutter wire (202); when the pressing is released, the clamping position boss (304) can move upward from the installation cavity (101) into the card slot to lock the cutter wire (202).

2. The mucosal incision knife with a cutter head locking structure according to claim 1, characterized in that: There are two card slots, one of which is a cutter-out card slot (102) and the other is a cutter-in card slot (103), and a chute (104) that is not connected to the two and is connected to the installation cavity (101) is provided between the two.

3. The mucosal incision knife with a cutter head locking structure according to claim 1, characterized in that: An elastic deformation groove (305) for enabling the clamping position boss (304) to move up and down is formed in a portion of the connecting portion (303) below the clamping position boss (304).

4. The mucosal incision knife with a cutter head locking structure according to claim 3, characterized in that: The groove width of the elastic deformation groove (305) is greater than the width of the connecting portion (303) so that the upper groove wall of the elastic deformation groove (305) protrudes from the connecting portion (303) to both sides to form a support cantilever (306).

5. The mucosal incision knife with a cutter head locking structure according to claim 3, characterized in that: A limiting portion (307) protruding upward from the bottom of the elastic deformation groove (305) is provided for limiting the maximum downward movement distance of the clamping position boss (304).

6. The mucosal incision knife with a cutter head locking structure according to claim 5, characterized in that: A V-shaped platform (3011) is recessed on the upper surface of the front end of the rod body (301), a through groove (3071) is formed inside the limiting portion (307), and the limiting portion (307) is erected on the V-shaped platform (3011).

7. The mucosal incision knife with a cutter head locking structure according to claim 1, characterized in that: A plurality of support beams (105) are protruded from the inner wall of the installation cavity (101) at intervals and are used for supporting the slide button integrated part (3).

8. A mucosal incision knife with a cutter head locking structure according to claim 1, characterized in that: An electrode seat (308) for fixing an electrode plug (309) is provided at the rear end of the rod body (301).

9. The mucosal incision knife with a cutter head locking structure according to claim 8, characterized in that: The electrode seat (308) includes a seat body (3083) and a cover body (3084) that are snap-connected, and the two enclose to form an electrode cavity for installing the electrode plug (309). A positioning groove (3081) for positioning the electrode plug (309) and an orientation groove (3082) for orienting the electrode plug (309) are provided in the electrode cavity.

10. The mucosal incision knife with a cutter head locking structure according to claim 1, characterized in that: A hanging hole (310) is provided at the rear end of the rod body (301). The hanging hole (310) retracts into the handle body (1) during cutter-out and extends backward out of the handle body (1) for hanging during cutter-in.

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