Handle lock structure and high-frequency cutting knife

Abstract

The utility model provides a handle lock catch structure and high frequency incision knife belong to high frequency incision knife technical field. Handle lock catch structure includes first casing, second casing and lock catch main part, first casing can slide relative between second casing, lock catch main part rotatablely installs on second casing through pivot, and the pivot place of lock catch main part is provided torsional spring, is equipped with the clamping groove on first casing, lock catch main part both ends are equipped with operating part and lock hook part respectively, and the lock hook part is pressed when operating part is not under, and the elastic force of torsional spring is pressed into the clamping groove, and operating part is pressed off the clamping groove of first casing. Handle lock catch structure of the utility model satisfies the adjustment requirement to the length of the cutter head, and guarantees the cutter head always to stretch out and not to return in the operation process, simplifies the operation process, improves the operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency cutting knife technology, specifically to a handle locking structure and a high-frequency cutting knife. Background Technology

[0002] Endoscopic submucosal dissection (ESD) is a minimally invasive endoscopic surgical technique, primarily using a high-frequency cutting blade. During ESD, the blade's extension length is selected based on the size, shape, and location of the lesion, the patient's individual condition, and the surgeon's experience. For example, a shorter extension length provides more precise manipulation for early esophageal or colon cancer lesions; a longer extension length is used for larger gastric lesions or those requiring deeper dissection. However, current high-frequency cutting blades lack adjustable extension length functionality. Although CN118453043A discloses a structure for controlling the extension length, it only allows for control of a specific extension length. During instrument use, if the surgeon does not consistently hold the handle, the blade may retract under pressure, potentially leading to complete retraction and reduced surgical efficiency. Utility Model Content

[0003] To overcome the above problems, this utility model provides a handle locking structure and a high-frequency cutting knife.

[0004] The technical solution adopted by this utility model is as follows: a handle locking structure includes a first housing, a second housing, and a locking body. The first housing and the second housing can slide relative to each other. The locking body is rotatably mounted on the second housing via a pivot. An elastic element is provided at the pivot of the locking body. A slot is provided on the first housing. An operating part and a locking hook part are respectively provided at both ends of the locking body. When the operating part is not pressed, the locking hook part is engaged in the slot by the elastic force of the elastic element. When the operating part is under pressure, it disengages from the slot of the first housing.

[0005] Preferably, the side of the locking hook portion opposite to the locking body is provided with an inclined surface, and the inclined surface in the locking hook portion forms an acute angle with the opposite surface of the inclined surface. The inclined surface has a guiding function, which facilitates the locking hook portion to slide smoothly into the slot during the locking process.

[0006] Preferably, the side of the latch body facing the second housing has a longitudinally extending protrusion. The protrusion has a through hole, the axis of which is perpendicular to the direction of relative sliding between the first and second housings. The latch body is rotatably mounted on the second housing via a pin passing through the through hole. The protrusion provides a stable pivot point for the latch body. In the locked state, the surface of the protrusion fits against the second housing, serving as a limiting element. At the same time, the protrusion also enhances the rigidity of the latch body, making it less prone to deformation.

[0007] Preferably, the torsion spring includes a connecting portion and elastic portions at both ends of the connecting portion; the connecting portion is U-shaped and abuts against the side of the latch body facing the second housing; the elastic portions have a spiral structure, with two elastic portions located at the two ends of the through hole of the protruding structure, respectively. The U-shaped connecting portion is supported by the second housing, and the two spiral elastic portions are placed on both sides of the through hole, which can apply elastic torque symmetrically and evenly to the latch body, ensuring smooth reset of the latch hook.

[0008] Preferably, the two elastic portions of the torsion spring extend into support arms, both of which abut against the second housing. The support arms directly abut against the second housing, providing a stable fulcrum for the torsion spring and ensuring that the torsion spring can effectively apply elastic torque to the locking body.

[0009] Preferably, the side of the latch body facing the second housing is provided with a mounting groove for installing the torsion spring connection part. The mounting groove limits and accommodates the torsion spring connection part, preventing the torsion spring from shifting or falling off when the latch body rotates, and ensuring that the torsion spring is installed in an accurate position.

[0010] Preferably, the elastic element is a spring, which bends under force, with one end abutting against the side of the latch body facing the second housing and the other end abutting against the side of the second housing facing the latch body, to provide elastic force so that the latch hook part can be engaged in the slot.

[0011] Preferably, the operating part of the locking body has a circular recess on the surface facing away from the second housing. The edge of the circular recess is smoothly transitioned, and the circular recess provides an ergonomic pressing contact surface. The smooth edge transition avoids hand discomfort or pain during operation.

[0012] Preferably, the slots are provided in multiple ways, and the multiple slots are arranged in the direction of relative sliding between the first housing and the second housing; the multiple slots provide multiple preset locking positions, so that the doctor can precisely lock the blade at different cutting lengths according to the surgical needs, adapting to diverse surgical scenarios.

[0013] This invention also proposes a high-frequency cutting knife, including the aforementioned handle locking structure. This high-frequency cutting knife utilizes the aforementioned reliable and easily adjustable handle locking structure, thereby providing convenient adjustment and stable locking of the blade extension length, meeting the precision operation requirements of surgeries such as ESD.

[0014] This invention achieves convenient, precise adjustment and reliable locking of the blade extension length through an optimized handle locking structure. Its beveled locking hook ensures smooth self-locking and stable engagement, while the unique torsion spring layout and support design provide stable and reliable reset torque. When applied to a high-frequency cutting scalpel, surgeons can quickly set and lock the required extension length according to different surgical sites and lesion needs, effectively solving the problems of traditional instruments being unable to adjust or prone to retraction after adjustment. This significantly improves the accuracy and efficiency of surgical operations and reduces operational risks caused by instrument instability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a handle locking structure according to the present invention; Figure 2 This is a side view of the locking body and torsion spring of this utility model; Figure 3 This is a schematic diagram of the inner structure of the locking body and torsion spring in the side view of this utility model.

[0016] 1-First housing, 2-Second housing, 3-Lock body, 4-Elastic element, 11-Slot, 31-Operating part, 32-Lock hook part, 33-Protruding structure, 34-Mounting groove, 41-Connecting part, 42-Elastic part, 43-Support arm. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Example 1 like Figure 1-3 As shown, a handle locking structure includes a first housing 1, a second housing 2, a locking body 3, and an elastic element 4. The first housing 1 and the second housing 2 are slidably connected relative to each other. The locking body 3 is mounted on the second housing 2 via a pivot, and the pivot of the locking body 3 is provided with the elastic element 4. The first housing 1 is provided with a plurality of slots 11, the arrangement direction of the slots 11 being the same as the relative sliding direction between the housings, and the slot shapes including circular, square, etc.

[0019] like Figure 2The main body 3 of the latch is made of plastic, with an operating part 31 at one end and a locking hook part 32 at the other end. Compared with other parts, the operating part 31 is wider and is shaped as a rounded rectangular sheet. The outer surface of the operating part 31 facing away from the second housing 2 has a circular recess with a smooth transition at the edge, without sharp edges or abrupt turns. It adopts a smooth curve design that conforms to the structure of human fingers, thus providing a more comfortable and natural operating experience when the user presses it. The locking hook part 32 is located on the inner surface of the end of the latch body 3 facing the second housing 2, forming an approximately right angle with the latch body 3. The end of the locking hook part 32 is blunt, and the outer side of the locking hook part 32 has an inclined surface that forms a certain angle with its opposite side. This angle is acute, and in this embodiment, the angle is specifically 26°. When the latch is installed on the housing, the inclined surface first contacts the slot 11 of the first housing 1 during the locking process. Through the guiding effect of the inclined surface, the locking hook part 32 can be smoothly inserted into the slot 11. The beveled edge of the locking hook 32 has a smooth transition, ensuring that there will be no jamming or damage to the housing slot during the locking process.

[0020] The inner side of the latch body 3 facing the second housing 2 has a longitudinal protrusion 33, with both ends of the protrusion 33 smoothly connected to the latch body 3. The protrusion 33 has a transverse through hole, the direction of which is perpendicular to the relative sliding direction of the housing. A pin is installed in the through hole, and the latch body 3 is installed on the second housing 2 by means of the pin. There is a gap between the through hole on both sides of the protrusion 33 and the second housing 2, which is used to install the elastic element 4.

[0021] like Figure 3 The elastic element 4 is a torsion spring, including a connecting part 41 and elastic parts 42 symmetrically arranged at both ends. The connecting part 41 is U-shaped and spans one end of the protruding structure 33 on the inner side of the latch body 3. Correspondingly, the inner side of the latch body 3 facing the second housing 2 is also provided with a mounting groove 34 for mounting the torsion spring connecting part 41, which matches the shape of the torsion spring connecting part 41. The elastic part 42 is spiral-shaped and located at the through hole of the protruding structure 33 on the inner side of the latch body 3. The pin passes through one elastic part 42, the through hole of the protruding structure 33, and the other elastic part 42 in sequence. Furthermore, the end of the elastic part 42 extends into a support arm 43. The two elastic parts 42 have a total of two support arms 43, and the support arms 43 abut against the side of the second housing 2 facing the latch.

[0022] When it is necessary to adjust the extension length of the high-frequency cutting blade, press down the operating part 31 of the locking body 3 and simultaneously push the second housing 2. The external pressure overcomes the elastic effect of the elastic element 4, and one end of the locking hook 32 of the lock is correspondingly lifted and disengaged from the slot 11, thereby unlocking. After adjusting to the target extension length, release the operating part 31 of the locking body 3. Under the elastic force of the elastic element 4, the handle locking structure returns to the locked state, and the locking hook 32 is reinserted into the slot 11 of the first housing 1.

[0023] Example 2 In another embodiment, the elastic element 4 is a spring. The spring is installed between the latch body 3 and the second housing 2 to provide elastic force so that the locking hook 32 engages with the slot 11. Specifically, the spring can be a metal sheet, one end of which is fixed to the second housing by a screw, and the other end abuts against the inner surface of the latch body facing the second housing, maintaining a compressed and bent state. The latch body is provided with a mounting groove that contacts the spring to ensure stable contact. When the operating part 31 is pressed, the latch body 3 rotates around the pivot, the spring undergoes elastic deformation, and stores energy, at which time the extension length of the high-frequency cutting blade can be adjusted; when the operating part 31 is released, the elastic restoring force of the spring causes the latch body 3 to reset, and the locking hook 32 re-engages with the slot 11, locking the extension length of the high-frequency cutting blade. Those skilled in the art will understand that the specific implementation of the spring is not limited to this, and any spring structure that can provide similar elastic function falls within the protection scope of this utility model.

[0024] The handle locking structure of this utility model meets the requirements for the blade extension length in various surgical scenarios and ensures that the blade always extends and does not retract during cutting, simplifying the operation process and improving the efficiency of surgery.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A handle locking structure, characterized in that, The device includes a first housing, a second housing, and a locking body. The first housing and the second housing are slidable relative to each other. The locking body is rotatably mounted on the second housing via a pivot. An elastic element is provided at the pivot of the locking body. A slot is provided on the first housing. An operating part and a locking hook part are respectively provided at both ends of the locking body. When the operating part is not pressed, the locking hook part is engaged in the slot by the elastic force of the elastic element. When the operating part is pressed, it disengages from the slot of the first housing.

2. The handle locking structure according to claim 1, characterized in that, The hook portion has an inclined surface on the side opposite to the main body of the lock, and the inclined surface in the hook portion forms an acute angle with the opposite surface of the inclined surface.

3. The handle locking structure according to claim 1, characterized in that, The side of the latch body facing the second housing has a longitudinally extending protrusion structure with a through hole. The axis of the through hole is perpendicular to the direction of relative sliding of the first housing and the second housing. The latch body is rotatably mounted on the second housing through a pin passing through the through hole.

4. The handle locking structure according to claim 3, characterized in that, The elastic element is a torsion spring, which includes a connecting part and elastic parts at both ends of the connecting part; the connecting part is "U" shaped and abuts against the side of the latch body facing the second housing; the elastic part is a spiral structure, with two elastic parts located at the two ends of the through hole of the protruding structure respectively.

5. The handle locking structure according to claim 4, characterized in that, The two elastic parts of the torsion spring extend into support arms, and both support arms abut against the second housing.

6. The handle locking structure according to claim 4, characterized in that, The locking body has a mounting groove on the side facing the second housing for installing the torsion spring connection.

7. The handle locking structure according to claim 1, characterized in that, The elastic element is a spring, which bends under force, with one end abutting against the side of the latch body facing the second housing, and the other end abutting against the side of the second housing facing the latch body.

8. The handle locking structure according to claim 1, characterized in that, The operating part of the locking body has a circular recess on the surface facing away from the second housing, and the edge of the circular recess is smoothly transitioned.

9. The handle locking structure according to claim 1, characterized in that, The slots are provided in one or more columns, and the multiple slots in each column are arranged along the direction of relative sliding between the first housing and the second housing.

10. A high-frequency cutting knife, characterized in that, Includes the handle locking structure according to any one of claims 1 to 7.

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