Detachable handle for a jaw distractor

Abstract

The utility model relates to a detachable handle of jaw bone tractor, including the adjusting handle for with the universal joint in the tractor connection, the tail end of universal joint is equipped with the cross section shows the polygonal shape's insertion hole, the rear end of adjusting handle has the cross section shows the polygonal shape's rear drive part, the front drive part is used for inserting the insertion hole and with it matches, the front end of adjusting handle has the cross section shows the polygonal shape, the front drive part of convenient and hand tool connection, its characterized in that: still include the limiting pipe, the limiting pipe activity sets up on adjusting handle, the rear end of limiting pipe with detachable connection of universal joint, adjusting handle can rotate about own axis relative to limiting pipe. When disassembling, only need to unscrew the limiting pipe from the universal joint, can pull off the adjusting handle from the movable part of universal joint, complete disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and in particular relates to a detachable handle of a jawbone traction device. This product is suitable for adult and child cases requiring traction of the maxilla or midface after osteotomy. Background Technology

[0002] Maxillary distraction osteogenesis is a common clinical procedure for correcting midfacial skeletal hypoplasia and bone defects. The treatment involves moving bone fragments at a specific rate using a distractor after a complete or partial maxillary osteotomy. The distractor needs to be worn for at least six months until sufficient bone formation is achieved, after which it is removed. Current maxillary distractor designs have several shortcomings.

[0003] One type is the implantable traction device, which is fixed by bone screws. Most of the components of the traction device are placed under the mucosa, making it more comfortable than extraoral and intraoral traction devices. For example, the Chinese utility model patent "In-oral Maxillary Bone Traction Device" with patent number ZL202021799787.X (publication number CN213722328U) discloses such an implantable traction device, which includes a sleeve, a screw, a spiral tube, a movable traction plate, and a fixed traction plate. The screw is rotatably set inside the sleeve, with one end of the screw extending out of the sleeve and connected to a sleeve. The spiral tube is slidably sleeved on the screw and threadedly connected to it. The sleeve has a groove along the sliding direction of the spiral tube. One side of the spiral tube passes through the groove and is fixedly connected to the movable traction plate. The end of the sleeve away from the sleeve is fixedly connected to the fixed traction plate. The fixed traction plate is racetrack-shaped and has multiple first screw holes spaced apart. The movable traction plate has a U-shaped structure, with multiple second screw holes spaced apart at both ends of the opening from the opening side to the connection side.

[0004] After jaw traction surgery and adjustment, a maintenance period of approximately two weeks is required. During this time, the traction device adjustment handle is no longer needed and should be removed clinically to prevent accidental operation. Most existing jaw traction devices lack a quick-release design, making it difficult to quickly detach the sleeve from the universal joint. Friction between the connecting rod and the sleeve may cause jamming during disassembly.

[0005] In conclusion, existing implantable cranial traction devices can be further improved. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a jaw traction device with a reasonable structure and a detachable handle that allows for quick assembly and disassembly of the handle, in light of the above-mentioned existing technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a detachable handle of a jaw traction device, including an adjusting handle for connecting with a universal joint in the traction device, the tail end of the universal joint is provided with an insertion hole with a polygonal cross-section, the rear end of the adjusting handle has a rear driving part with a polygonal cross-section, the front driving part is used to insert into and match the insertion hole, and the front end of the adjusting handle has a front driving part with a polygonal cross-section for easy connection with hand tools; characterized in that: it also includes a limiting tube, the limiting tube is movably sleeved on the adjusting handle, the rear end of the limiting tube is detachably connected to the universal joint, and the adjusting handle can rotate relative to the limiting tube around its own axis.

[0008] Preferably, the universal joint has an external thread on its outer circumference, and the rear end of the limiting tube is connected to the external thread via an internal thread. This threaded connection ensures a secure connection between the limiting tube and the universal joint while also facilitating the separation of the limiting tube from the universal joint. Alternatively, a snap-fit ​​connection or other similar locking methods can be used. When adjustment is required, simply insert the rear driving part of the adjusting handle into the insertion hole on the movable part, then place the limiting tube onto the adjusting handle and thread it onto the universal joint.

[0009] Because the entire jawbone traction device is very small, including the adjustment handle and the limiting tube, it is inconvenient to directly turn it by hand. To overcome this problem, further improvements have been made. The front end of the limiting tube has a polygonal cross-section, which facilitates connection with hand tools. The driving part allows the limiting tube to be used with the matching hand tool (sleeve) for quick and effortless assembly and disassembly.

[0010] Alternatively, the cross-section of the aforementioned drive unit can be hexagonal or quadrilateral. Hexagonal is preferred.

[0011] Furthermore, the inner hole of the aforementioned limiting tube is a stepped hole, and the inner wall of the larger portion of the stepped hole is provided with the internal thread. It also includes a washer, which is fitted and welded to the adjusting handle. The washer is located inside the larger portion of the stepped hole, with one side abutting against the inner shoulder of the stepped hole, and the opposite side contacting the outer end face of the universal joint. The front end of the adjusting handle also has a protruding shoulder, which forms a limiting contact with the front end of the limiting tube. The washer and shoulder design create an axial constraint between the adjusting handle and the limiting tube. Importantly, the washer is made of a metal material with a lower coefficient of friction, resulting in a low coefficient of friction between the adjusting handle and the limiting tube. This optimizes the problem of jamming during disassembly of the limiting tube caused by friction in clinical practice, meaning there will be no jamming during the disassembly of the adjusting handle.

[0012] As a type of universal joint, the universal joint has a fixed part and a movable part. The fixed part is used to fix the end of the traction screw in the traction device. The movable part is rotatably mounted on the fixed part and can swing up, down, left and right. The insertion hole is located at the tail end of the movable part. The limiting tube is detachably connected to the movable part.

[0013] Compared with the prior art, the advantages of this utility model are as follows: When adjustment is required, simply insert the rear driving part of the adjustment handle into the insertion hole on the universal joint, and then put the limiting tube on the adjustment handle and connect it detachably; during disassembly, simply unscrew the limiting tube from the universal joint, and the adjustment handle can be pulled away from the moving part of the universal joint to complete the disassembly; after the final traction is completed, due to the removal of the adjustment handle, there are basically no extra parts left outside the patient's body, maximizing the patient's comfort and aesthetics during traction treatment, avoiding discomfort caused by the patient bumping the adjustment handle during daily activities, and preventing the traction screw from deflecting in the direction of relaxation due to accidental contact with the adjustment handle by external force, thus ensuring that the fixed traction plate and the movable traction plate are always kept in the appropriate position, ensuring that the newly generated bone is flat and the surgical quality is excellent. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0015] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0016] Figure 3 This is an exploded view of an embodiment of the present utility model;

[0017] Figure 4 This is a three-dimensional schematic diagram of the limiting tube in an embodiment of the present utility model;

[0018] Figure 5 This is a three-dimensional schematic diagram of the universal connection in an embodiment of this utility model. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-5 The figure shown is a preferred embodiment of the present invention.

[0021] A detachable handle for a jawbone traction device includes an adjusting handle 2 for connection to a universal joint 1 in the traction device. The tail end of the universal joint 1 is provided with an insertion hole 121 with a polygonal cross-section. The rear end of the adjusting handle 2 has a rear driving part 21 with a polygonal cross-section, and the front end of the adjusting handle 2 has a front driving part 22 with a polygonal cross-section for easy connection with hand tools. The front driving part 22 is used to insert into and match the insertion hole 121. The specific structure of the traction device can be referred to in the prior art.

[0022] The main improvement of this utility model is that it also includes a limiting tube 3, which is movably sleeved on the adjusting handle 2. The rear end of the limiting tube 3 is detachably connected to the universal joint 1, and the adjusting handle 2 can rotate relative to the limiting tube 3 around its own axis. The universal joint 1 has an external thread 122 on its outer periphery, and the rear end of the limiting tube 3 is provided with an internal thread 32 that is threadedly connected to the external thread 122.

[0023] Because the entire jawbone traction device is very small, including the adjustment handle and the limiting tube, it is inconvenient to directly turn it by hand. To overcome this problem, further improvements have been made. The front end of the limiting tube 3 is formed into a driving part 31 with a polygonal cross-section, which facilitates connection with hand tools. The cross-section of the driving part 31 is hexagonal or quadrilateral. The design of the driving part 31 facilitates the use of the limiting tube with the matching hand tool (sleeve) to achieve quick and effortless assembly and disassembly.

[0024] The inner hole of the limiting tube 3 is a stepped hole 33. The inner wall of the large hole of the stepped hole 33 is provided with the internal thread 32. It also includes a washer 4. The washer 4 is sleeved and welded to the adjusting handle 2. The washer 4 is located in the large hole of the stepped hole 33. One side of the washer 4 abuts against the inner shoulder 331 of the stepped hole 33. The other side of the washer 4 contacts the outer end face of the universal joint 1. The front end of the adjusting handle 2 also has a protruding shoulder 23. The shoulder 23 forms a limiting contact with the front end of the limiting tube 3.

[0025] The universal joint 1 in this embodiment has a fixed part 11 and a movable part 12. The fixed part 11 is used to fix the end of the traction screw in the traction device. The movable part 12 is rotatably mounted on the fixed part 11 and can swing up, down and left and right. The insertion hole 121 is provided at the tail end of the movable part 12. The limiting tube 3 is detachably connected to the movable part 12.

[0026] When adjustment is required, simply insert the rear drive part 21 of the adjusting handle 2 into the insertion hole 121 on the universal joint 1, and then put the limiting tube 3 on the adjusting handle 2 and connect it detachably. When disassembling, simply unscrew the limiting tube 3 from the universal joint 1 to pull the adjusting handle 2 away from the moving part 12 of the universal joint 1, thus completing the disassembly of the adjusting handle 2. The setting of the washer 4 and the shoulder 23 makes an axial constraint between the adjusting handle 2 and the limiting tube 3. Importantly, the washer 4 is made of a metal material with a lower coefficient of friction, which makes the coefficient of friction between the adjusting handle 2 and the limiting tube 3 small, optimizing the phenomenon of jamming when disassembling the limiting tube 3 due to friction in clinical practice. That is, there will be no jamming during the disassembly of the adjusting handle 2.

[0027] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "inner," "outer," "upper," and "lower," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A detachable handle for a jawbone traction device, comprising an adjusting handle (2) for connection to a universal joint (1) in the traction device, wherein the tail end of the universal joint (1) is provided with an insertion hole (121) having a polygonal cross-section, the rear end of the adjusting handle (2) has a rear driving portion (21) having a polygonal cross-section, and the front end of the adjusting handle (2) has a front driving portion (22) having a polygonal cross-section for easy connection with a hand tool, the front driving portion (22) being used to insert into and match the insertion hole (121); characterized in that: It also includes a limiting tube (3), which is movably sleeved on the adjusting handle (2). The rear end of the limiting tube (3) is detachably connected to the universal joint (1), and the adjusting handle (2) can rotate relative to the limiting tube (3) around its own axis.

2. The detachable handle of the jawbone traction device according to claim 1, characterized in that: The universal joint (1) has an external thread (122) on its outer periphery, and the rear end of the limiting tube (3) is provided with an internal thread (32) that is threadedly connected to the external thread (122).

3. The detachable handle of the jawbone traction device according to claim 2, characterized in that: The front end of the limiting tube (3) forms a driving part (31) with a polygonal cross-section, which is convenient for connection with hand tools.

4. The detachable handle of the jawbone traction device according to claim 3, characterized in that: The cross-section of the drive unit (31) is hexagonal or quadrilateral.

5. The detachable handle of the jawbone traction device according to claim 2, 3, or 4, characterized in that: The inner hole of the limiting tube (3) is a stepped hole (33). The inner wall of the large hole of the stepped hole (33) is provided with the internal thread (32). It also includes a washer (4). The washer (4) is sleeved and welded to the adjusting handle (2). The washer (4) is located in the large hole of the stepped hole (33). One side of the washer (4) abuts against the inner shoulder (331) of the stepped hole (33). The other side of the washer (4) contacts the outer end face of the universal joint (1). The front end of the adjusting handle (2) also has a protruding shoulder (23). The shoulder (23) forms a limiting contact with the front end of the limiting tube (3).

6. The detachable handle of the jawbone traction device according to claim 1, characterized in that: The universal joint (1) has a fixed part (11) and a movable part (12). The fixed part (11) is used to fix the end of the traction screw in the traction device. The movable part (12) is rotatably mounted on the fixed part (11) and can swing up, down, left and right. The insertion hole (121) is located at the tail end of the movable part (12). The limiting tube (3) is detachably connected to the movable part (12).

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