Quick-change connector of orthopedic tool

Abstract

The utility model relates to the technical field of surgical instruments, in particular to a quick-change connector of an orthopedic tool, the orthopedic tool comprises a main machine and a working head, the working head is connected with the main machine through the quick-change connector, the quick-change connector comprises a retainer, a rotary sleeve and a clamping assembly, and the retainer is provided with an inner cavity for the working head to be inserted in. A clamping groove matched with the clamping assembly is formed in the outer wall of the holder, the holder is movably sleeved with the rotary sleeve, an operation cavity capable of containing the clamping assembly is formed, elastic fins are symmetrically arranged on the two sides of the holder, a clamping groove is formed between the elastic fins and the holder, and the clamping groove is communicated with the inner cavity. The holder is provided with a front end matched with the working head and a rear end matched with the main machine, a positioning boss is arranged at the rear end of the holder, and an opening of the clamping groove faces the rear end. According to the quick-change connector, the quick-change connector is additionally arranged between the main machine and the working head, so that one main machine can be matched with various working heads for use, the number of orthopedic tools required by surgical operations is reduced, and the quick-change connector is convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, in particular to a quick-change joint of orthopedic tools. Background Art

[0002] With the continuous development of orthopedic power tools, there are many tools in different fields. Although these tools make surgical operations more convenient and safer, the increase in the number of tools has led to a significant increase in the space required to place the tools, which will make the already crowded surgical space even more crowded, affecting the operating space of surgical personnel. In addition to the crowded space, different tools need to be replaced as a whole when used, which requires more space and time during the disinfection, sterilization and cleaning process. Most orthopedic power tools use motors to provide power to the working part, and the important parts used are similar or identical parts. Therefore, using multiple hosts to meet the needs of detailed classification of surgeries will cause a lot of resource waste, thereby leading to an increase in surgical costs. Utility Model Content

[0003] In order to solve the problem that existing orthopedic power tools need to be replaced as a whole, occupy a large space and are costly, the utility model provides a quick-change joint for orthopedic tools. By adding a quick-change joint between the main unit and the working head, one main unit can be used with a variety of working heads, thereby reducing the number of orthopedic tools required for surgical operations and facilitating disassembly and replacement.

[0004] The utility model provides a quick-change joint for orthopedic tools. The orthopedic tools include a main machine and a working head. The working head is connected to the main machine through the quick-change joint. The quick-change joint includes a retainer, a rotary sleeve and a clamping assembly. The retainer is provided with an inner cavity for inserting the working head. The outer wall of the retainer is provided with a clamping groove adapted to the clamping assembly. The rotary sleeve is movably sleeved outside the retainer to form an operating cavity for accommodating the clamping assembly. The clamping groove is used to clamp various working heads, and the rotary sleeve can be used to realize the rapid disassembly of the working head, thereby reducing the number of orthopedic tools required for surgical operations.

[0005] Furthermore, elastic wings are symmetrically arranged on both sides of the holder, a clamping groove is formed between the elastic wings and the holder, and the clamping groove is connected to the inner cavity. The clamping pin placed in the clamping groove moves to the bottom of the groove to clamp the working head in the inner cavity.

[0006] Furthermore, the holder has a front end that cooperates with the working head and a rear end that cooperates with the main machine, a positioning boss is provided at the rear end of the holder, the opening of the clamping groove faces the rear end, the clamping assembly includes a clamping pin, a locking spring and a limiting ring, the clamping pin is placed in the clamping groove, a limiting ring is provided near the rear end of the clamping pin, and the spring sleeve is arranged on the holder and placed between the positioning boss and the limiting ring. The working head compression spring is placed in the inner cavity, and after being installed in place, the clamping pin presses into the bottom of the groove under the spring rebound action to clamp the working head.

[0007] Furthermore, the clamping assembly also includes a toggle assembly for driving the clamping pin to move along the length direction of the retaining frame, and a top block is provided on one side of the toggle assembly close to the rear end, so that a clamping gap that can accommodate the clamping pin is formed between the toggle assembly and the limit ring. The toggle assembly is driven to rotate by the rotary sleeve, thereby pushing the clamping pin to move.

[0008] Furthermore, the toggle assembly includes a rotating ring and a sheath, the top block is arranged on the side of the sheath close to the rear end, the side of the sheath close to the front end is provided with a rotating track, and the rotating ring is provided with a knob pin adapted to the rotating track. The axial displacement of the rotating ring remains unchanged, and the sheath can be pushed to move during the rotation process.

[0009] Furthermore, the sheath is provided with a positioning groove opening toward the front end, and the retaining frame is provided with a positioning pin that can be placed in the positioning groove, and the positioning groove and the top block are arranged on the same straight line. The positioning groove and the positioning pin cooperate to achieve positioning of the sheath when it moves toward the front end.

[0010] Furthermore, a cover plate is provided at the front end of the retainer, the front end of the rotary sleeve is fixedly connected to the cover plate, a steel ball rack is provided at the rear end of the retainer, a plurality of steel balls are evenly distributed on the steel ball rack in the circumferential direction, and the rear end of the rotary sleeve rolls with the steel balls. The rotary sleeve is fixed by the arrangement of the front cover plate and the rear steel ball rack.

[0011] Furthermore, a positioning column is provided on the outer edge of the rotating ring, a positioning step is provided on the inner wall of the rotating sleeve to accommodate the positioning column, a mounting groove is provided on the cover plate to engage with the front end of the rotating sleeve, an annular groove is provided at the rear end of the rotating sleeve to accommodate a steel ball, and the rotating ring is clamped between the rotating sleeve and the cover plate. The rotating ring is clamped by the clamped cover plate and the rotating sleeve, so that the rotating ring, the rotating sleeve and the cover plate form a whole without relative movement.

[0012] Furthermore, the front end of the retainer is provided with a positioning tooth matched with the working head, and the rear end of the retainer is provided with a sleeve matched with the output shaft in the main machine. The working head is also provided with a positioning tooth matched with it, and a motor is provided in the main machine.

[0013] Furthermore, the outer surface of the rotary sleeve is provided with anti-slip grooves, so as to facilitate the unlocking by rotating the rotary sleeve.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a quick-change joint for orthopedic tools. By adding a quick-change joint between a main unit and a working head, the versatility of the main unit is achieved, so that one main unit can be used in conjunction with a variety of working heads, reducing the number of orthopedic tools required for surgical operations, thereby reducing space occupancy, and the tool is easy to disassemble and replace, effectively improving surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a schematic diagram of orthopedic tools;

[0018] Figure 2 This is the external structure diagram of the quick-change connector;

[0019] Figure 3 This is a three-dimensional view of the inside of a quick-change connector;

[0020] Figure 4 It is the internal plan view of the quick-change connector;

[0021] Figure 5 is a first angle schematic diagram of the cage;

[0022] Figure 6 is a second angle schematic diagram of the cage;

[0023] Figure 7 is a schematic diagram of the clamping pin being placed in the clamping groove;

[0024] Figure 8 This is the first angle exploded view of the quick-change connector;

[0025] Fig. 9 This is the second angle exploded view of the quick-change connector;

[0026] Fig.10 It is a schematic diagram of the cooperation between the rotary sleeve and the retainer;

[0027] In the figure, 1. retaining frame, 11. inner cavity, 12. clamping groove, 13. operating cavity, 14. elastic wing, 15. positioning boss, 16. positioning pin, 17. steel ball rack, 18. positioning tooth, 19. shaft sleeve, 2. rotating sleeve, 21. positioning step, 22. annular groove, 3. clamping pin, 4. locking spring, 5. limit ring, 6. rotating ring, 61. clamping gap, 62. knob pin, 63. positioning column, 7. sleeve, 71. top block, 72. rotating track, 73. positioning groove, 8. cover plate, 81. mounting groove, 9. main machine, 91. motor. DETAILED DESCRIPTION

[0028] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0029] The main unit 9 and the working head of the traditional orthopedic power tool are integrated. Different tools need to be replaced as a whole when used, which is costly and occupies a large space. In order to make one main unit 9 adaptable to multiple working heads, a quick-change joint of orthopedic tools is designed, and the working head is connected to the main unit 9 through the quick-change joint, such as Figure 1 and 2 As shown, the quick-change connector includes a retaining frame 1, a rotary sleeve 2 and a clamping assembly. The retaining frame 1 is provided with an inner cavity 11 for inserting a working head, and the outer wall of the retaining frame 1 is provided with a clamping groove 12 adapted to the clamping assembly. The rotary sleeve 2 is movably mounted on the outside of the retaining frame 1 to form an operating cavity 13 that can accommodate the clamping assembly.

[0030] The inner cavity 11 of the retainer 1 is used to cooperate with the working head. When the working head is pushed into the inner cavity 11, the clamping pin 3 will be pushed to move toward the rear end along the clamping groove 12 on the retainer 1, so that the working head can be smoothly pushed into the inner cavity 11. The working head matching part is provided with an annular groove for the clamping pin 3 to be pressed into. The clamping pin 3 will be clamped on the annular groove to ensure that the working head will not fall off. The clamping pin 3 can be a cylindrical pin or a special-shaped pin. When the working head is installed in place, the rebound of the locking spring 4 in the operating cavity 13 will drive the clamping pin 3 to move toward the front end, so that the clamping pin 3 is re-inserted into the clamping groove 12 to clamp the working head. The clamping groove 12 provides a displacement route for the clamping pin 3. The clamping pin 3 can unlock the working head by moving along the clamping groove 12 to the notch, and the clamping pin 3 can clamp the working head by moving along the clamping groove 12 to the bottom of the groove.

[0031] like Figure 3 and 4As shown, in order to realize the elastic adjustment of the clamping groove 12, elastic wings 14 are symmetrically arranged on both sides of the retainer 1, and a clamping groove 12 is formed between the elastic wings 14 and the retainer 1, and the clamping groove 12 is connected with the inner cavity 11. When the clamping pin 3 moves toward the front end of the retainer 1 to the bottom of the clamping groove 12, the clamping pin 3 partially extends into the inner cavity 11 and just fits into the annular groove on the outer edge of the working head placed in the inner cavity 11, thereby completing the clamping of the working head.

[0032] Specifically, the retaining frame 1 has a front end that cooperates with the working head and a rear end that cooperates with the main machine 9. The rear end of the retaining frame 1 is provided with a positioning boss 15, and the opening of the clamping groove 12 faces the rear end. The clamping assembly includes a clamping pin 3, a locking spring 4 and a limiting ring 5. The clamping pin 3 is placed in the clamping groove 12, and a limiting ring 5 is provided near the rear end of the clamping pin 3. The locking spring 4 is sleeved on the retaining frame 1 and placed between the positioning boss 15 and the limiting ring 5.

[0033] The clamping pin 3 is sandwiched between the limiting ring 5 and the sheath 7, and a locking spring 4 is installed between the limiting ring 5 and the positioning boss 15 of the retaining frame 1. When the clamping pin 3 moves forward, the sheath 7 is pushed toward the front end. When the clamping pin 3 moves backward, the locking spring 4 is compressed when the clamping pin 3 pushes the limiting ring 5, and the clamping pin 3 opens along the clamping groove 12. The opening distance is greater than the diameter of the inner cavity 11 to ensure that the working head is inserted; after the annular groove on the outer edge of the working head is inserted into the clamping groove 12 position, the locking spring 4 pushes the limiting ring 5 toward the front end, and the limiting ring 5 pushes the clamping pin 3 to the bottom of the groove to clamp the working head.

[0034] like Figure 5-7 As shown, in order to cooperate with the positioning and installation of the working head, the front end of the retainer 1 is provided with a positioning tooth 18 that cooperates with the working head, which can provide a multi-station working mode for some chucks, and can also provide a precise orientation function for chucks that need orientation. The rear end of the retainer 1 is provided with a sleeve 19 that cooperates with the output shaft in the main machine 9. The main machine 9 is provided with a motor 91, and the output shaft of the motor 91 extends into the sleeve 19 of the quick-change joint, thereby transmitting kinetic energy to the joint. In order to facilitate rotation and unlocking, the outer surface of the rotary sleeve 2 is provided with anti-slip grooves.

[0035] In order to facilitate unlocking the joint, the clamping assembly further includes a toggle assembly for driving the clamping pin 3 to move along the length direction of the retaining frame 1. A top block 71 is provided on one side of the toggle assembly close to the rear end, so that a clamping gap 61 that can accommodate the clamping pin 3 is formed between the toggle assembly and the limiting ring 5. The top block 71 can maintain the distance between the toggle assembly and the limiting ring 5, and is used to accommodate the clamping pin 3, so that the clamping pin 3 is sandwiched between the limiting ring 5 and the sheath 7.

[0036] like Figure 8 and 9As shown, the toggle assembly includes a rotating ring 6 and a sleeve 7, a top block 71 is arranged on the side of the sleeve 7 close to the rear end, a rotating track 72 is arranged on the side of the sleeve 7 close to the front end, and a knob pin 62 adapted to the rotating track 72 is arranged on the rotating ring 6. The rotating track 72 is arranged in an inclined plane, with the narrower end being the bottom of the track and the wider end being the top of the track. Since the axial position of the rotating ring 6 remains unchanged, when the rotating ring 6 rotates, the knob pin 62 moves along the bottom of the track to the top of the track, that is, the sleeve 7 is pushed to move to the rear end, driving the locking pin 3 to move out of the clamping groove 12, the joint is unlocked, and the working head can be withdrawn from the inner cavity 11. After replacing a new working head, the rotating ring 6 can be rotated back in the opposite direction to lock the working head again. The rotating track 72 cooperates with the knob pin 62. When the knob pin 62 of the toggle rotating ring 6 is at the bottom of the track, the quick-change joint is in a locked state; when the knob pin 62 of the toggle rotating ring 6 is at the top of the track, the quick-change joint is in an unlocked state.

[0037] The sheath 7 is provided with a positioning groove 73 with an opening toward the front end, and the retaining frame 1 is correspondingly provided with a positioning pin 16 that can be placed in the positioning groove 73, and the positioning groove 73 and the top block 71 are arranged on the same straight line. The positioning groove 73 cooperates with the positioning pin 16 to ensure the orientation of the sheath 7 and the retaining frame 1. The retaining frame 1 is provided with an orientation pin hole, which provides an installation position for the orientation pin 16 and ensures that the sheath 7 can be oriented in a preset orientation by the orientation pin 16 to prevent the sheath 7 from rotating.

[0038] like Fig.10 As shown, in order to position the rotary sleeve 2, a cover plate 8 is provided at the front end of the retainer 1, the front end of the rotary sleeve 2 is fixedly connected to the cover plate 8, and a steel ball rack 17 is provided at the rear end of the retainer 1. The steel ball rack 17 evenly distributes a number of steel balls in the circumferential direction, and the rear end of the rotary sleeve 2 rolls with the steel balls. The steel ball rack 17 and the steel balls can make the rotary sleeve 2 move more smoothly, and can also locate the front and rear positions of the rotary sleeve 2.

[0039] A positioning column 63 is provided on the outer edge of the rotating ring 6, and a positioning step 21 that can accommodate the positioning column 63 is provided on the inner wall of the rotating sleeve 2. A mounting groove 81 that cooperates with the front end of the rotating sleeve 2 is provided on the cover plate 8. An annular groove 22 that can accommodate a steel ball is provided at the rear end of the rotating sleeve 2. The rotating ring 6 is clamped between the rotating sleeve 2 and the cover plate 8.

[0040] The rotating ring 6 and the rotating sleeve 2 can rotate together after being installed by clamping together through the positioning column 63 and the positioning step 21. The cover plate 8 and the rotating sleeve 2 are fixedly connected through the installation groove 81 and the convex ring, and the rotating ring 6 is clamped, that is, the rotating sleeve 2, the rotating ring 6 and the cover plate 8 form a whole after installation without relative movement.

[0041] When the working head needs to be connected, the quick-change connector needs to be in a locked state, and the working head is directly inserted along the inner cavity 11. After the working head enters the inner cavity 11, the clamping pin 3 is pushed, and the clamping pin 3 is pushed from the bottom to the top along the clamping groove 12. After the distance between the two clamping pins 3 is larger than the size of the working head, the working head can be pushed in normally. When the working head is pushed to the locked position, the clamping pin 3 is pushed back by the locking spring 4, and the working head is automatically locked. When unlocking is required, the rotary sleeve 2 is rotated, and the rotary sleeve 2 drives the rotating ring 6 to rotate. The knob pin 62 on the rotating ring 6 pushes the sheath 7 to move to the rear end, driving the clamping pin 3 to retreat and unlock the working head. The working head can be pulled out of the quick-change connector, and then the rotary sleeve 2 is rotated back to re-lock the quick-change connector.

[0042] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A quick-change joint for an orthopedic tool, the orthopedic tool comprising a main body (9) and a working head, the working head being connected to the main body (9) via a quick-change joint, characterized in that: The quick-change connector comprises a retaining frame (1), a rotary sleeve (2) and a clamping assembly, wherein the retaining frame (1) is provided with an inner cavity (11) for inserting the working head, the outer wall of the retaining frame (1) is provided with a clamping groove (12) adapted to the clamping assembly, and the rotary sleeve (2) is movably sleeved on the outside of the retaining frame (1) to form an operating cavity (13) capable of accommodating the clamping assembly.

2. The quick-change joint of an orthopedic tool according to claim 1, characterized in that: Elastic fins (14) are symmetrically arranged on both sides of the retaining frame (1), a clamping groove (12) is formed between the elastic fins (14) and the retaining frame (1), and the clamping groove (12) is connected to the inner cavity (11).

3. The quick-change joint of an orthopedic tool according to claim 1, characterized in that: The retaining frame (1) has a front end cooperating with the working head and a rear end cooperating with the main machine (9). The rear end of the retaining frame (1) is provided with a positioning boss (15). The opening of the clamping groove (12) faces the rear end. The clamping assembly comprises a clamping pin (3), a locking spring (4) and a limiting ring (5); the clamping pin (3) is placed in a clamping groove (12); a limiting ring (5) is provided near the rear end of the clamping pin (3); and the locking spring (4) is sleeved on the retaining frame (1) and placed between the positioning boss (15) and the limiting ring (5).

4. The quick-change joint of an orthopedic tool according to claim 3, characterized in that: The clamping assembly also includes a toggle assembly for driving the clamping pin (3) to move along the length direction of the retaining frame (1), and a top block (71) is provided on one side of the toggle assembly close to the rear end, so that a clamping gap (61) capable of accommodating the clamping pin (3) is formed between the toggle assembly and the limiting ring (5).

5. The quick-change joint of an orthopedic tool according to claim 4, characterized in that: The toggle assembly comprises a rotating ring (6) and a sleeve (7), the top block (71) is arranged on a side of the sleeve (7) close to the rear end, a rotating track (72) is arranged on a side of the sleeve (7) close to the front end, and a knob pin (62) matched with the rotating track (72) is arranged on the rotating ring (6).

6. The quick-change joint of an orthopedic tool according to claim 5, characterized in that: The protective sleeve (7) is provided with a positioning groove (73) with its opening facing the front end, and the retaining frame (1) is correspondingly provided with a positioning pin (16) which can be inserted into the positioning groove (73). The positioning groove (73) and the top block (71) are arranged on the same straight line.

7. The quick-change joint of an orthopedic tool according to claim 5, characterized in that: The front end of the retaining frame (1) is provided with a cover plate (8), the front end of the rotating sleeve (2) is fixedly connected to the cover plate (8), the rear end of the retaining frame (1) is provided with a steel ball rack (17), a plurality of steel balls are evenly distributed in the circumferential direction of the steel ball rack (17), and the rear end of the rotating sleeve (2) is in rolling cooperation with the steel balls.

8. The quick-change joint of an orthopedic tool according to claim 7, characterized in that: The outer edge of the rotating ring (6) is provided with a positioning column (63), the inner wall of the rotating sleeve (2) is provided with a positioning step (21) capable of accommodating the positioning column (63), the cover plate (8) is provided with a mounting groove (81) engaged with the front end of the rotating sleeve (2), the rear end of the rotating sleeve (2) is provided with an annular groove (22) capable of accommodating a steel ball, and the rotating ring (6) is clamped between the rotating sleeve (2) and the cover plate (8).

9. The quick-change joint of an orthopedic tool according to claim 3, characterized in that: The front end of the retaining frame (1) is provided with a positioning tooth (18) that cooperates with the working head, and the rear end of the retaining frame (1) is provided with a shaft sleeve (19) that cooperates with the output shaft in the main machine (9).

10. The quick-change joint of an orthopedic tool according to claim 1, characterized in that: The outer surface of the rotary sleeve (2) is provided with anti-slip grooves.

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