Medical ratchet handle

Abstract

The utility model discloses a medical ratchet handle, comprising an inner aluminum handle, a reversing base, a reversing sleeve and a ratchet shaft, wherein the inner aluminum handle is threadedly connected with the reversing base, a reversing sleeve is rotatably arranged on the outer wall of the reversing base, the ratchet shaft is rotatably installed in the reversing base through a bearing, and also comprises a reversing component, the reversing component comprises a first ratchet body and a second ratchet body, a through groove is provided on one side of the reversing base, the first ratchet body and the second ratchet body are rotatably installed in the through groove through a pin shaft, and the reversing processing of the ratchet shaft for forward and reverse rotation is realized by adjusting the first ratchet body and the second ratchet body to be respectively pressed against the outer wall of the ratchet shaft; the doctor changes the rotation direction of the ratchet shaft by rotating the reversing sleeve, so that the doctor can complete the forward and reverse rotation of the ratchet shaft without loosening the handle, thereby providing convenience for the doctor's use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a medical ratchet handle. Background Art

[0002] As is known, orthopedic surgery is one of the important methods for treating diseases and injuries of the skeletal system, and bone screws and bone plates are commonly used implants in orthopedic surgery. They can effectively fix bones, promote fracture healing, and restore bone function. In orthopedic surgery, bone screws are often used to lock prostheses in the body or to reinforce bones through steel plates. In this case, a screwdriver is required to tighten the bone screws or a handle is required to tighten the bone screws, so that the bone screws can fix the fractured bones and help stabilize the bones in the correct position, thereby promoting fracture healing.

[0003] For example, the patent with announcement number CN202397551 U, announcement date August 29, 2012, and name "A Medical Micro Wrench", discloses a medical micro wrench, which relates to the field of medical device technology. The key technology is that the pressure plate is fixedly connected to the wheel hub, and the ratchet built into the wheel hub is rotatably connected to the wheel hub; the front part of the long strip of ratchet is built into the wheel hub, and the rear part is built into the handle, and the ratchet and the ratchet form a pair of toothed ratchet transmission connection; a spring is set between the ratchet and the wheel hub, and the spring sleeve is on the long strip of ratchet; the wheel hub is fixed to the handle. The device is exquisitely designed, simple in structure, and easy to operate. At the same time, it also avoids the reversal of the wrench during the process of loosening and tightening the screw, reduces the risk of surgery, and makes the surgical process easier.

[0004] In the prior art, most handles are fixed or one-way ratchet type, which is inconvenient for doctors to perform screwdriver reversal or refit operations. In addition, ordinary screwdrivers or handles cannot be rotated forward and reversed without releasing the handle during use, which affects the doctor's operation. Utility Model Content

[0005] The purpose of the present invention is to provide a medical ratchet handle to solve the above problems in existing medical equipment and transportation.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a medical ratchet handle, comprising an inner aluminum handle, a reversing base, a reversing sleeve and a ratchet shaft, the inner aluminum handle being threadedly connected to the reversing base, a reversing sleeve being rotatably arranged on the outer wall of the reversing base, the ratchet shaft being rotatably installed in the reversing base through a bearing, and also comprising a reversing assembly, the reversing assembly comprising a first ratchet body and a second ratchet body, a through groove being provided on one side of the reversing base, a first ratchet body and a second ratchet body being rotatably installed in the through groove through a pin shaft, and the reversing processing of the ratchet shaft for forward and reverse rotation is achieved by adjusting the first ratchet body and the second ratchet body to be respectively pressed against the outer wall of the ratchet shaft.

[0007] As mentioned above, the inner wall of the reversing base is respectively provided with a first arc groove and a second arc groove along the trajectory of the reversing base, one end of the first ratchet body is pressed against the inner wall of the first arc groove, the other end of the first ratchet body is a first ratchet tooth portion, and the first ratchet tooth portion of the first ratchet body is pressed against the ratchet shaft, one end of the second ratchet body is pressed against the inner wall of the second arc groove, the other end of the second ratchet body is a second ratchet tooth portion, and the second ratchet tooth portion of the first ratchet body is pressed against the ratchet shaft.

[0008] As mentioned above, one end of the first ratchet body close to the first arc groove is connected to the inner wall of the reversing base through the first elastic member, and one end of the second ratchet body close to the second arc groove is connected to the inner wall of the reversing base through the second elastic member.

[0009] As mentioned above, a groove is provided on the inner wall of the reversing base away from one end of the through groove, a ball is slidably installed in the groove, and the ball and the inner wall of the groove are connected by a third elastic member.

[0010] As mentioned above, three identical semi-cylindrical grooves are provided on the inner wall of the reversing sleeve near the groove along the circumferential direction thereof.

[0011] As mentioned above, an end cover is provided at the end of the inner aluminum handle.

[0012] In the above-mentioned, the outer wall of the inner aluminum handle is covered with a silicone sleeve.

[0013] As mentioned above, the reversing sleeve and the reversing base are connected via a retaining spring.

[0014] As mentioned above, a tool socket is threadedly connected on the ratchet shaft.

[0015] As mentioned above, a retaining ring is provided on the outer wall of the tool bayonet, a locking sleeve is installed at one end of the tool bayonet, two recessed holes are symmetrically provided on the tool bayonet, a steel ball is embedded in each of the two recessed holes, the two steel balls are in contact with the inner wall of the locking sleeve, the contact and mating part between the inner wall of the locking sleeve and the steel ball is tapered, and the locking sleeve and the retaining ring are connected by a fourth elastic member.

[0016] The beneficial effects of the utility model are as follows: the user (i.e. the doctor) rotates the reversing sleeve counterclockwise to drive the first ratchet body to press against the ratchet shaft while the second ratchet body is separated from the outer wall of the ratchet shaft, so that the ratchet shaft can rotate clockwise; the user (i.e. the doctor) rotates the reversing sleeve clockwise to drive the second ratchet body to press against the ratchet shaft while the first ratchet body is separated from the outer wall of the ratchet shaft, so that the ratchet shaft can rotate counterclockwise; the rotation direction of the ratchet shaft can be changed by rotating the reversing sleeve, so that the doctor can complete the forward and reverse rotation of the ratchet shaft without releasing the handle, thereby providing convenience for the doctor's use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is an exploded view of the utility model;

[0019] Figure 2 It is a cross-sectional structural diagram of the position of the reversing sleeve of the utility model;

[0020] Figure 3 It is a schematic cross-sectional structure diagram of the meshing position of the ratchet shaft, the first ratchet body and the second ratchet body of the utility model;

[0021] Figure 4 It is a partial cross-sectional structural schematic diagram of the first ratchet body and the ratchet shaft position of the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 6 It is a partial cross-sectional structural schematic diagram of the ratchet shaft, the first ratchet body, the second ratchet body and the fourth elastic member of the utility model.

[0024] Description of reference numerals:

[0025] 1. End cover; 2. Silicone sleeve; 3. Inner aluminum handle; 4. Reversing base; 5. First ratchet body; 6. Pin shaft; 7. Second ratchet body; 8. Through groove; 9. Reversing sleeve; 10. Retaining ring; 11. Ratchet shaft; 12. First arc groove; 13. Second arc groove; 14. First ratchet tooth; 15. Bearing; 16. Second ratchet tooth; 17. Tool bayonet; 18. Groove; 19. Ball; 20. Third elastic member; 21. Fourth elastic member; 22. Steel ball; 23. Locking sleeve; 24. Semi-cylindrical groove; 25. Retaining spring; 26. First elastic member; 27. Second elastic member. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 6 As shown, a medical ratchet handle provided by an embodiment of the utility model comprises an inner aluminum handle 3, a reversing base 4, a reversing sleeve 9 and a ratchet shaft 11, wherein the inner aluminum handle 3 is threadedly connected with the reversing base 4, a reversing sleeve 9 is rotatably provided on the outer wall of the reversing base 4, the ratchet shaft 11 is rotatably installed in the reversing base 4 through a bearing 15, and further comprises a reversing assembly, wherein the reversing assembly comprises a first ratchet body 5 and a second ratchet body 7, a through groove 8 is provided on one side of the reversing base 4, and the first ratchet body 5 and the second ratchet body 7 are rotatably installed in the through groove 8 through a pin shaft 6, and the first ratchet body 5 and the second ratchet body 7 are respectively rotatably installed in the through groove 8 through a pin shaft 6, and the reversing processing of the ratchet shaft 11 is realized by adjusting the first ratchet body 5 and the second ratchet body 7 to be respectively pressed against the outer wall of the ratchet shaft 11, so as to realize the forward and reverse reversing processing of the ratchet shaft 11.

[0028] Specifically, the medical ratchet joint is a tool used by doctors to tighten bone screws. Both ends of the inner aluminum handle 3 are provided with threads. One end of the inner aluminum handle 3 is provided with an end cover 1. The end cover 1 and the inner aluminum handle 3 are threadedly connected and tightened. The other end of the inner aluminum handle 3 is provided with a reversing base 4. The reversing base 4 and the inner aluminum handle 3 are threadedly connected and tightened. The inner aluminum handle 3, the end cover 1 and the reversing base 4 are all provided with through holes in the middle. A silicone sleeve 2 is sleeved on the outer wall of the inner aluminum handle 3. The hardness and shape of the silicone sleeve 2 and the inner aluminum handle 3 are designed according to the ergonomics of the human hand to provide a comfortable grip. The reversing sleeve 9 and the reversing base 4 are annular structures. The outer wall of the reversing sleeve 9 is set to a concave structure to facilitate the rotation of the reversing sleeve 9. The reversing sleeve 9 and the reversing base 4 are connected by a card The spring 25 is connected so that the reversing sleeve 9 and the reversing base 4 cannot move relative to each other in the axial direction. The ratchet shaft 11 is inserted into the retaining ring 10 and assembled into the reversing base 4. The retaining ring 10 is used to reduce the friction generated when the ratchet shaft 11 and the reversing base 4 rotate relative to each other. The inner wall of the reversing base 4 is respectively provided with a first arc groove 12 and a second arc groove 13 along the trajectory of the reversing base 4. One end of the first ratchet body 5 is a semicircular surface and is pressed against the inner wall of the first arc groove 12. The other end of the first ratchet body 5 is a first ratchet tooth portion 14, and the first ratchet tooth portion 14 of the first ratchet body 5 is pressed against the ratchet shaft 11. One end of the second ratchet body 7 is a semicircular surface and is pressed against the inner wall of the second arc groove 13. The other end of 7 is the second ratchet tooth portion 16, and the second ratchet tooth portion 16 of the first ratchet body 5 is tightly against the ratchet shaft 11, and the end of the first ratchet body 5 close to the first arc groove 12 is connected to the inner wall of the reversing base 4 through the first elastic member 26, and the end of the second ratchet body 7 close to the second arc groove 13 is connected to the inner wall of the reversing base 4 through the second elastic member 27. When the doctor rotates the reversing sleeve 9 counterclockwise, the reversing sleeve 9 pushes the first elastic member 26 (the first elastic member 26 is an element capable of telescopic reset, preferably a spring) and the first ratchet body 5 to rotate counterclockwise. The first ratchet body 5 is pushed by the first elastic member 26 and the reversing sleeve 9, and the first ratchet body 5 is The pin shaft 6 is installed in the through groove 8, so that the first ratchet body 5 rotates around the pin shaft 6, so that the first ratchet tooth portion 14 of the first ratchet body 5 is pressed against the outer wall of the ratchet shaft 11. At the same time, the reversing sleeve 9 pulls the second elastic member 27 (the second elastic member 27 is a component that can be retracted and reset, preferably a spring) and the second ratchet body 7 to rotate counterclockwise. Under the pulling action of the second elastic member 27 and the reversing sleeve 9, and the second ratchet body 7 is installed in the through groove 8 through the pin shaft 6, the second ratchet body 7 rotates around the pin shaft 6, so that the second ratchet tooth portion 16 of the second ratchet body 7 is separated from the outer wall of the ratchet shaft 11, so that the ratchet shaft 11 can only rotate clockwise.When the doctor rotates the reversing sleeve 9 clockwise, the reversing sleeve 9 pushes the second elastic member 27 and the second ratchet body 7 to rotate clockwise. The second ratchet body 7 is pushed by the second elastic member 27 and the reversing sleeve 9, and the second ratchet body 7 is installed in the through groove 8 through the pin shaft 6, so that the second ratchet body 7 rotates around the pin shaft 6, so that the second ratchet tooth portion 16 of the second ratchet body 7 is pressed against the outer wall of the ratchet shaft 11. At the same time, the reversing sleeve 9 pulls the first elastic member 26 and the first ratchet body 5 to rotate clockwise. The first ratchet body 5 is pulled by the first elastic member 26 and the reversing sleeve 9, and the first ratchet body 5 is installed in the through groove 8 through the pin shaft 6, so that the first ratchet body 5 rotates around the pin shaft 6, so that the first ratchet tooth portion 14 of the first ratchet body 5 is disengaged from the outer wall of the ratchet shaft 11, so that the ratchet shaft 11 can only rotate counterclockwise (such as; Figure 2 As shown), that is, when the first ratchet tooth portion 14 of the first ratchet body 5 is pressed against the outer wall of the ratchet shaft 11, the ratchet shaft 11 can only rotate clockwise, and when the second ratchet tooth portion 16 of the second ratchet body 7 is pressed against the outer wall of the ratchet shaft 11, the ratchet shaft 11 can only rotate counterclockwise. By rotating the reversing sleeve 9, the clockwise and counterclockwise rotations of the ratchet shaft 11 can be adjusted, which provides convenience for doctors to tighten bone screws; in the prior art, the handles are mostly fixed or one-way ratchet type, which is very inconvenient for doctors to perform screwdriver reversing or changing operations, and ordinary screwdrivers or handles cannot complete forward and reverse rotation without loosening the handle during use, which affects the doctor's operation. ; In the present embodiment, the user (i.e. the doctor) rotates the reversing sleeve 9 counterclockwise to drive the first ratchet body 5 to press against the ratchet shaft 11 while the second ratchet body 7 is disengaged from the outer wall of the ratchet shaft 11, so that the ratchet shaft 11 can rotate clockwise. The user (i.e. the doctor) rotates the reversing sleeve 9 clockwise to drive the second ratchet body 7 to press against the ratchet shaft 11 while the first ratchet body 5 is disengaged from the outer wall of the ratchet shaft 11, so that the ratchet shaft 11 can rotate counterclockwise. The rotation direction of the ratchet shaft 11 can be changed by rotating the reversing sleeve 9, so that the doctor can complete the forward and reverse rotation of the ratchet shaft 11 without releasing the handle, thereby providing convenience for the doctor's use.

[0029] Furthermore, a groove 18 is provided on the inner wall of the reversing base 4 away from the through groove 8, and a ball 19 is slidably installed in the groove 18. The ball 19 and the inner wall of the groove 18 are connected by a third elastic member 20; three semi-cylindrical grooves 24 are evenly provided on the inner wall of the reversing sleeve 9 near the groove 18 along its circumferential direction, and the radius of each semi-cylindrical groove 24 is the same.

[0030] Specifically, when the doctor rotates the reversing sleeve 9, the ball 19 is pressed against the outer wall of the reversing sleeve 9 under the elastic force of the third elastic member 20 (the third elastic member 20 is an element capable of telescopic reset, preferably a spring). When the ratchet shaft 11 needs to be subjected to force (that is, the ratchet shaft 11 needs to rotate clockwise or counterclockwise), during the doctor's rotation of the reversing sleeve 9, the ball 19 first slides into the groove 18 under the pressing action of the inner wall of the reversing sleeve 9. When the ball 19 slides into the semi-cylindrical groove 24, the ball 19 and the semi-cylindrical groove 24 are pressed against each other. Under the pushing action of the third elastic member 20, the ball 19 is pressed against the semi-cylindrical groove 24. In the column groove 24, the reversing base 4 and the reversing sleeve 9 are relatively positioned. The three semi-cylindrical grooves provide three gears, corresponding to the three situations of "forward drive", "bidirectional rotation drive" and "reverse drive", respectively, providing doctors with a variety of options for use. That is, when the ball 19 slides into the first semi-cylindrical groove 24 (such as: the semi-cylindrical groove 24 closest to the first ratchet body 5 in the circumferential direction of the reversing sleeve 9), the ball 19 performs relative positioning on the reversing base 4 and the reversing sleeve 9, and the ratchet shaft 11 can only rotate clockwise; when the ball 19 slides into the second semi-cylindrical groove 24 (such as: the middle semi-cylindrical groove 24, such as Figure 3 ), the ball 19 performs relative positioning operation on the reversing base 4 and the reversing sleeve 9, and the ratchet shaft 11 cannot rotate relative to the reversing sleeve; when the ball 19 slides to the third semi-cylindrical groove 24 (e.g., the semi-cylindrical groove 24 closest to the second ratchet body 7 on the circumferential direction of the reversing sleeve 9, as shown Figure 2 As shown in the figure, the ball 19 performs relative positioning operation on the reversing base 4 and the reversing sleeve 9, and the ratchet shaft 11 can only rotate counterclockwise.

[0031] In another embodiment provided by the utility model, a tool bayonet 17 is threadedly connected to the ratchet shaft 11; a positioning ring is provided on the outer wall of the tool bayonet 17, a locking sleeve 23 is installed at one end of the tool bayonet 17, two concave holes are symmetrically provided on the tool bayonet 17, a steel ball 22 is embedded in each of the two concave holes, the inner wall of the locking sleeve 23 and the steel ball contact matching part have a taper, the inner wall of the locking sleeve 23 and the steel ball contact matching part are inclined toward the inside from the end away from the reversing sleeve 9 to the end close to the reversing sleeve 9, and the locking sleeve 23 and the positioning ring are connected by a fourth elastic member 21.

[0032] Specifically, when the tool bayonet 17 needs to be loosened, the doctor pulls the locking sleeve 23 away from the end close to the reversing sleeve 9, and the locking sleeve 23 pulls the fourth elastic member 21 (the fourth elastic member 21 is a component capable of telescopic reset, preferably a spring), so that the fourth elastic member 21 is in a more compressed state. Since the inner wall of the locking sleeve and the steel ball contact matching part is inclined from the end away from the reversing sleeve 9 to the end close to the reversing sleeve 9, the activity space of the steel ball 22 between the first semi-cylindrical groove 24 and the concave hole is increased. The steel ball 22 no longer clamps the screwdriver (i.e., the tool for screwing into the bone screw), and the screwdriver can be taken out. When the screwdriver is replaced, the doctor releases the pull on the locking sleeve 23, and under the stretching action of the fourth elastic member 21, the locking sleeve 23 slides toward the end away from the reversing sleeve 9, so that the movable space of the steel ball 22 between the first semi-cylindrical groove 24 and the concave hole is reduced, so that the steel ball 22 clamps the screwdriver (i.e., the tool for screwing into the bone screw), and the screwdriver can be positioned and limited, which provides convenience for the doctor's use.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A medical ratchet handle, comprising an inner aluminum handle, a reversing base, a reversing sleeve and a ratchet shaft, wherein the inner aluminum handle is threadedly connected with the reversing base, a reversing sleeve is rotatably arranged on the outer wall of the reversing base, and the ratchet shaft is rotatably mounted in the reversing base through a bearing, characterized in that: It also includes a reversing component, which includes a first ratchet body and a second ratchet body. A through groove is opened on one side of the reversing base. The first ratchet body and the second ratchet body are rotatably installed in the through groove through a pin shaft. By adjusting the first ratchet body and the second ratchet body to be tightly pressed against the outer wall of the ratchet shaft, the reversing processing of the ratchet shaft can be achieved.

2. A medical ratchet handle according to claim 1, characterized in that: The inner wall of the reversing base is respectively provided with a first arc groove and a second arc groove along the trajectory of the reversing base, one end of the first ratchet body is pressed against the inner wall of the first arc groove, the other end of the first ratchet body is a first ratchet tooth portion, and the first ratchet tooth portion of the first ratchet body is pressed against the ratchet shaft, one end of the second ratchet body is pressed against the inner wall of the second arc groove, the other end of the second ratchet body is a second ratchet tooth portion, and the second ratchet tooth portion of the second ratchet body is pressed against the ratchet shaft.

3. A medical ratchet handle according to claim 2, characterized in that: One end of the first ratchet body close to the first arc groove is connected to the inner wall of the reversing base through a first elastic member, and one end of the second ratchet body close to the second arc groove is connected to the inner wall of the reversing base through a second elastic member.

4. A medical ratchet handle according to claim 3, characterized in that: A groove is provided on the inner wall of the reversing base at one end away from the through slot, a ball is slidably mounted in the groove, and the ball is connected to the inner wall of the groove via a third elastic member.

5. The medical ratchet handle according to claim 4, characterized in that: Three identical semi-cylindrical grooves are provided on the inner wall of the reversing sleeve near the groove along the circumferential direction thereof.

6. The medical ratchet handle according to claim 1, characterized in that: An end cover is provided at the end of the inner aluminum handle.

7. The medical ratchet handle according to claim 1, characterized in that: A silicone sleeve is sleeved on the outer wall of the inner aluminum handle.

8. The medical ratchet handle according to claim 1, characterized in that: The reversing sleeve and the reversing base are connected via a clamping spring.

9. The medical ratchet handle according to claim 1, characterized in that: The ratchet shaft is threadedly connected with a tool bayonet.

10. The medical ratchet handle according to claim 9, characterized in that: A retaining ring is arranged on the outer wall of the tool bayonet, a locking sleeve is installed at one end of the tool bayonet, two recessed holes are symmetrically provided on the tool bayonet, a steel ball is embedded in each of the two recessed holes, the two steel balls are in contact with the inner wall of the locking sleeve, the contact and matching part between the inner wall of the locking sleeve and the steel ball is tapered, and the locking sleeve and the retaining ring are connected by a fourth elastic member.

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