Connecting structure and surgical knife

Abstract

The utility model relates to the field of medical equipment, and discloses a connecting structure and a surgical knife, the connecting structure comprises a handle joint, a knife joint and a spring buckle; an annular connecting piece is arranged in the cutter connector, a spiral connecting groove is formed in the connecting piece and is of a spiral cam structure, the head end of the connecting groove is open, and a protruding clamping and locking groove is formed in the portion, close to the tail end, of the connecting groove. The spring buckle is of a protruding structure capable of generating elastic deformation, one end of the spring buckle is fixed in the handle connector, the other end of the spring buckle is provided with a clamping block matched with the connecting groove, and when the handle connector is in butt joint with the cutter connector, the clamping block can enter the connecting groove from the head end of the connecting groove and cross the clamping and locking groove to move to the tail end. According to the utility model, the stable butt joint of the handle and the cutter can be realized, the shaking feeling between the handle and the cutter is reduced, and an operator can be assisted to intuitively judge whether the handle and the cutter are stably connected or not.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a connection structure and a surgical instrument. Background Technology

[0002] In clinical surgery, surgical instruments are frequently used to perform procedures on patients, such as a surgical burr disclosed in application number 202321252145.1 and a cartilage scraper disclosed in application number 202322971188.1. These surgical instruments require a dedicated drive handle for use.

[0003] Currently, the drive handles used with these surgical instruments include, for example, a power-driven handle disclosed in application number 202210766228.6. The handle and the instrument are connected using a disc spring and a snap-fit ​​mechanism. This method makes it difficult to visually determine the stability of the connection between the handle and the instrument. Furthermore, after the handle and instrument are connected, there is some wobbling at the connection point, reducing the stability of the connection. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a connection structure and surgical instrument to solve the problem mentioned in the background art that, with the existing connection method, it is impossible to intuitively determine whether the connection between the handle and the instrument is secure.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] Firstly, a connection structure is provided, the connection structure comprising:

[0007] Handle connector;

[0008] A tool connector, wherein an annular connector is provided inside the tool connector, and a helical connecting groove is provided on the connecting groove. The connecting groove has a helical cam structure, the first end of the connecting groove is open, and the second end of the connecting groove has a locking groove recessed towards the first end; and

[0009] A spring clip, which is a protruding structure capable of elastic deformation, has one end fixed inside the handle connector and the other end provided with a locking block that adapts to the connecting groove. When the handle connector is connected to the tool connector, the locking block can enter the connecting groove from the first end of the connecting groove, so that the spring clip is elastically pre-tightened on the cam structure of the connecting groove and moves along the connecting groove into the locking groove.

[0010] In one possible implementation, the handle connector is provided with an annular positioning element, and the tool connector is provided with an annular positioning groove adapted to the positioning element. When the handle connector and the tool connector are mated, the positioning element can be inserted into the annular positioning groove.

[0011] In one possible implementation, the spring clip has a plurality of through holes evenly arranged along the axial and circumferential directions, and the through holes on adjacent circumferences are staggered.

[0012] In one possible implementation, the end of the spring clip away from the locking block is provided with an annular flange, and the handle connector has a mounting groove that adapts to the flange.

[0013] In one possible implementation, the number of both the connecting slot and the card block is at least two.

[0014] In a second aspect, this application provides a surgical instrument, which includes a handle portion, a blade portion, and a connecting structure as described in any one of the first aspects, wherein the handle portion and the blade portion are detachably connected via the connecting structure.

[0015] In one possible implementation, the handle portion includes a handle housing, a motor, a handle tail cap, and a cable protector.

[0016] The handle connector of the connection structure is located at one end of the handle housing;

[0017] The motor is installed inside the handle housing;

[0018] The handle tail cap is installed inside the handle housing at the end away from the connecting structure;

[0019] The cable guard is installed on the outside of the handle housing at the end away from the connecting structure.

[0020] In one possible implementation, the cutting tool section includes a tool housing, a drive shaft, and a cutting head;

[0021] The tool connector of the connection structure is located at one end of the tool housing;

[0022] The drive shaft is rotatably mounted inside the tool housing, and one end of the drive shaft can be connected to the output shaft of the motor.

[0023] The cutter head's shank is rotatably mounted inside the cutter housing and is connected to the end of the drive shaft away from the motor.

[0024] In one possible implementation, a connecting key is provided at one end of the drive shaft, and a keyway adapted to the connecting key is installed on the output shaft of the motor.

[0025] The beneficial effects of this utility model are:

[0026] By adopting the technical solution of this application, when the handle connector and the tool connector are mated, the connector can be inserted into the inner ring of the spring clip, and the locking block can enter the connecting groove from the first end of the connecting groove. Then, by rotating the tool connector or the handle connector, the locking block can move along the connecting groove into the locking groove. With this setting, not only can a stable mating of the handle connector and the tool connector be achieved, reducing the wobbling between the handle and the tool, but also when the locking block enters the locking groove at the end of the connecting groove, the locking block will spring back due to the elastic force of the spring clip, making the connection structure exhibit a noticeable bounce. This allows the operator to intuitively judge that the handle and the tool are securely connected. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the surgical instrument in the embodiments of this application;

[0028] Figure 2 This is an embodiment of the present application. Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 This is a schematic diagram of the tool connector structure in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the spring clip structure in an embodiment of this application;

[0031] Figure 5 This is an exploded schematic diagram of the surgical instrument in an embodiment of this application;

[0032] Among them, 110 is the handle connector; 111 is the positioning component; 120 is the tool connector; 121 is the connector; 122 is the connecting groove; 123 is the locking groove; 124 is the annular positioning groove; 130 is the spring buckle; 131 is the locking block; 132 is the through hole; 133 is the flange; 210 is the handle housing; 220 is the motor; 230 is the handle tail cover; 240 is the cable sleeve; 310 is the tool housing; 320 is the drive shaft; and 330 is the tool head. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0034] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] Example 1

[0036] like Figures 1-4 As shown, this application embodiment provides a connection structure including a handle connector 110, a tool connector 120, and a spring clip 130. Both the tool connector 120 and the handle connector 110 are annular structures. The tool connector 120 has an annular connector 121, and the connector 121 has a spiral connecting groove 122. The side of the connecting groove 122 facing the spring clip 130 is designed as a spiral cam structure. The first end of the connecting groove 122 is open, and the tail end of the connecting groove 122 has a locking groove 123 recessed towards the first end. The spring clip 130 is an annular protrusion capable of a certain degree of elastic deformation. One end of the spring clip 130 is fixed inside the handle connector 110, and the inner side of the other end has a locking block 131 adapted to the connecting groove 122. Furthermore, the inner diameter of the spring clip 130 is equal to the outer diameter of the connector 121.

[0037] With the above technical solution, when the handle connector 110 and the tool connector 120 are mated, the connector 121 can be inserted into the inner ring of the spring clip 130, and the locking block 131 can enter the connecting groove 122 from the first end of the connecting groove 122, so that the spring clip 130 is elastically pre-tightened on the cam structure of the connecting groove 122. Then, by rotating the tool connector 120 or the handle connector 110, the locking block 131 can move along the connecting groove 122 into the locking groove 123. With this setting, not only can the stable mating of the handle connector 110 and the tool connector 120 be achieved, reducing the shaking sensation between the handle and the tool, but also when the locking block 131 enters the locking groove 123 at the tail end of the connecting groove 122, the locking block 131 will rebound due to the elastic force of the spring clip 130, making the connection structure exhibit a noticeable jumping sensation, thus allowing the operator to intuitively judge that the connection between the handle and the tool is secure.

[0038] In one possible embodiment, the handle connector 110 is provided with an annular positioning element 111, which can surround the spring clip 130 on its inner side. The tool connector 120 is provided with an annular positioning groove 124 adapted to the positioning element 111, which also surrounds the connector 121 on its inner side. When the handle connector 110 and the tool connector 120 are mated, the positioning element 111 can be inserted into the annular positioning groove 124. Through the mutual cooperation of the positioning element 111 and the annular positioning groove 124, not only is the positioning of the handle and the tool easier, but the stability of the handle and the tool after mating is also improved.

[0039] In one possible embodiment, the spring clip 130 is provided with a plurality of through holes 132 evenly arranged along the axial and circumferential directions, and the through holes 132 on adjacent circumferences are staggered. Specifically, in this embodiment, three through holes 132 evenly arranged along the circumferential direction are arranged on the same circumference of the spring clip 130; three sets of through holes 132 are equally spaced along the axial direction of the spring clip 130, and each set of through holes 132 corresponds to all the through holes 132 on the same circumference. By providing through holes 132, the elastic performance of the spring clip 130 can be improved, facilitating the deformation and recovery of the spring clip 130.

[0040] In one possible embodiment, the end of the spring clip 130 away from the latch block 131 has an annular flange 133, and the handle connector 110 has a mounting groove that adapts to the flange 133. With this configuration, when installing the spring clip 130, the flange 133 is simply installed into the mounting groove. Furthermore, the outer diameter of the spring clip 130 is equal to the inner diameter of the handle connector 110, ensuring that the spring clip 130 can be stably installed into the handle connector 110.

[0041] In one possible embodiment, the number of connecting slots 122 and locking blocks 131 is at least two. The stability of the connection between the handle and the tool can be enhanced through the mutual cooperation of multiple sets of locking blocks 131 and connecting slots 122. In this embodiment, the number of connecting slots 122 and locking blocks 131 is preferably two.

[0042] Example 2

[0043] like Figures 1-5 As shown, a surgical instrument includes a handle, a blade, and a connecting structure as described in Embodiment 1. The handle and blade are detachably connected via the connecting structure. This design not only ensures a stable connection between the handle connector 110 and the blade connector 120, reducing the wobbling between the handle and the blade, but also, when the locking block 131 enters the locking groove 123 at the end of the connecting groove 122, the locking block 131 will spring back due to the elastic force of the spring buckle 130, resulting in a noticeable bounce in the connecting structure. This allows the operator to visually determine that the handle and the blade are securely connected.

[0044] In one possible embodiment, the handle includes a handle housing 210, a motor 220, a handle tail cap 230, and a cable protector 240. The handle connector 110 of the connecting structure is integrally formed at one end of the handle housing 210. The motor 220 is fixed inside the handle housing 210; the motor 220 can be a servo motor 220 or a stepper motor 220. The handle tail cap 230 is installed inside the handle housing 210 at the end away from the connecting structure and is used to fix the motor 220. The cable protector 240 is installed on the outside of the handle housing 210 at the end away from the connecting structure and is used to install the cable connecting the motor 220.

[0045] In one possible embodiment, the cutting tool section includes a tool housing 310, a drive shaft 320, and a cutting head 330. A tool connector 120, part of the connecting structure, is integrally formed at one end of the tool housing 310. The drive shaft 320 is rotatably mounted within the tool housing 310 via bearings, and one end of the drive shaft 320 is capable of driving a transmission connection to the output shaft of the motor 220. Specifically, one end of the drive shaft 320 is provided with a connecting key, and the output shaft of the motor 220 is fitted with a keyway adapted to the connecting key. When the handle and the cutting tool are aligned, the connecting key can be inserted into the keyway, thereby enabling the motor 220 to drive the drive shaft 320 to rotate. The shank of the cutting head 330 is rotatably mounted within the tool housing 310 via bearings and is drivingly connected to the end of the drive shaft 320 away from the motor 220. The drive shaft 320 and the cutting tool can be connected via a key connection, gear transmission, or other transmission methods. The head of the cutting head 330 extends beyond the tool housing 310.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A connection structure characterized by comprising: The connection structure includes: Handle connector (110); A tool connector (120) is provided with an annular connector (121) inside the tool connector (120). A connecting groove (122) is provided on the connector (121). The connecting groove (122) is designed as a spiral cam structure. The first end of the connecting groove (122) is open, and the tail end of the connecting groove (122) has a locking groove (123) recessed towards the first end. A spring clip (130) is a protruding structure capable of elastic deformation. One end of the spring clip (130) is fixed in the handle connector (110), and the other end is provided with a locking block (131) that adapts to the connecting groove (122). When the handle connector (110) and the tool connector (120) are connected, the locking block (131) can enter the connecting groove (122) from the first end of the connecting groove (122), so that the spring clip (130) is elastically pre-tightened on the cam structure of the connecting groove (122), and the locking block (131) can move along the connecting groove (122) into the locking groove (123).

2. The connection structure according to claim 1, characterized in that The handle connector (110) is provided with an annular positioning element (111), and the tool connector (120) is provided with an annular positioning groove (124) adapted to the positioning element (111). When the handle connector (110) and the tool connector (120) are connected, the positioning element (111) can be inserted into the annular positioning groove (124).

3. The connection structure according to claim 1, characterized by The spring buckle (130) has a plurality of through holes (132) evenly arranged along the axial and circumferential directions, and the through holes (132) on adjacent circumferences are staggered.

4. The connection structure according to any one of claims 1 to 3, characterized in that The spring clip (130) has an annular flange (133) at one end away from the clip (131), and the handle connector (110) has a mounting groove that adapts to the flange (133).

5. The connection structure according to any one of claims 1 to 3, characterized in that The number of the connecting slots (122) and the card blocks (131) is at least two.

6. A surgical cutting tool, characterized by The surgical instrument includes a handle, a blade, and a connecting structure as described in any one of claims 1-5, wherein the handle and the blade are detachably connected via the connecting structure.

7. The surgical knife of claim 6, wherein, The handle includes a handle housing (210), a motor (220), a handle tail cap (230), and a cable protector (240); The handle connector (110) of the connection structure is located at one end of the handle housing (210); The motor (220) is installed inside the handle housing (210); The handle tail cap (230) is installed inside the handle housing (210) at the end away from the connecting structure; The cable guard (240) is installed on the outside of the handle housing (210) away from the connecting structure.

8. The surgical knife of claim 7, wherein, The cutting tool section includes a cutting tool housing (310), a drive shaft (320), and a cutting head (330); The tool connector (120) of the connection structure is disposed at one end of the tool housing (310); The drive shaft (320) is rotatably mounted inside the tool housing (310), and one end of the drive shaft (320) can be connected to the output shaft of the motor (220) for transmission. The shank of the cutter head (330) is rotatably mounted inside the cutter housing (310) and is connected to the end of the drive shaft (320) away from the motor (220).

9. The surgical knife of claim 8, wherein, One end of the drive shaft (320) is provided with a connecting key, and the output shaft of the motor (220) is equipped with a keyway adapted to the connecting key.

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