Depth gauge for bone nail matching instrument

Abstract

The utility model discloses a depth gauge for a bone nail matching instrument, which comprises a fixed shell, the front surface of the fixed shell is provided with a limiting chute, the inner wall of the fixed shell is provided with a limiting hole, and the inner wall of the fixed shell is connected with a measuring rod in a sliding manner; the sliding adjusting assembly is pushed to drive the measuring rod and the fixing hook to move downwards through the limiting rotating mechanism to enter a bone nail hole in the bone of a patient to be hooked and fixed, the adjusting and fixing assembly is pushed to extrude the elastic limiting mechanism, and the fixing shell is pushed downwards to drive the adjusting and fixing assembly to enter the bone nail hole. The adjusting and fixing assembly is pushed by resilience force of the elastic limiting mechanism to be attached and fixed to the inner wall of the bone nail hole, the fixing shell can be vertically fixed to the position above the bone nail hole for depth measurement, the purpose of conveniently improving the measuring precision of the depth gauge is achieved, and the problem that an existing depth gauge is difficult to vertically fix to the position above the bone nail hole and cannot measure the bone nail hole is solved. And therefore, unavoidable deviation is caused during measurement, and the adaptation degree of the bone nail is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bone screw hole measurement, in particular to a depth gauge for a bone screw matching instrument. Background Art

[0002] Orthopedics is one of the most common departments in major hospitals. It mainly studies the anatomy, physiology and pathology of the skeletal muscle system, and uses drugs, surgery and physical methods to maintain and develop the normal form and function of this system.

[0003] When performing fracture repair surgery, steel plates and bone screws are usually required. Before use, bone screw holes need to be opened on the patient's bones to install the bone screws. After the opening is completed, a depth gauge is needed to measure the depth of the bone screw hole to select the appropriate bone screw.

[0004] However, when using the existing depth gauge, due to the different bone shapes of patients, it is usually difficult to fix the depth gauge vertically above the bone screw hole. During measurement, deviations are inevitable, making it difficult to accurately select the length of the bone screw, which greatly reduces the adaptability of the bone screw. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a depth gauge for a bone screw supporting instrument, which is used to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A depth gauge for a bone screw supporting instrument comprises a fixed shell, a limiting slot is provided on the front side of the fixed shell, a limiting hole is provided on the inner wall of the fixed shell, a measuring rod is slidably connected to the inner wall of the fixed shell, a fixing hook is fixedly connected to the bottom end of the measuring rod, a fixing seat is fixedly connected to the bottom surface of the fixed shell, a fixing cylinder is fixedly connected to the inner wall of the fixing seat, a limited rotation mechanism is arranged inside the limiting hole, a sliding adjustment component is arranged inside the limiting slot, an elastic limiting mechanism is arranged inside the fixing cylinder, and an adjustment fixing component is arranged on the bottom surface of the fixed shell.

[0008] Preferably, the limiting rotation mechanism consists of a limiting sleeve and a fixed ring, the limiting sleeve is slidably connected to the inner wall of the limiting hole, and the inner wall of the limiting sleeve is rotatably connected to the surface of the measuring rod, the inner wall of the fixing ring is fixedly connected to the surface of the measuring rod, and the fixing ring is rotatably connected to the inner wall of the limiting sleeve.

[0009] Preferably, the sliding adjustment assembly consists of a connecting slider and an adjustment button, the connecting slider is slidably connected to the inner wall of the limiting slide groove, and the inner wall of the connecting slider is fixedly connected to the surface of the limiting slide sleeve, the adjustment button is fixedly connected to the front side of the connecting slider, and the adjustment button is slidably connected to the front side of the fixed shell.

[0010] Preferably, the elastic limiting mechanism consists of a connecting shaft, a limiting plate and a spring, the connecting shaft is slidably connected to the inner wall of the fixed cylinder, the limiting plate is fixedly connected to the surface of the connecting shaft, and the limiting plate is slidably connected to the inner wall of the fixed cylinder, and the spring is fixedly connected to the surface of the limiting plate.

[0011] Preferably, the adjustment and fixing assembly consists of a positioning plate, a connecting plate and a push plate, the positioning plate is slidably connected to the bottom surface of the fixed shell, the connecting plate is fixedly connected to the surface of the positioning plate, and the inner wall of the connecting plate is fixedly connected to the surface of the connecting shaft, and the inner wall of the push plate is fixedly connected to the surface of the positioning plate.

[0012] Preferably, the fixing tube is circular in shape and is made of metal material.

[0013] Preferably, there are multiple positioning plates, and the multiple positioning plates are symmetrically arranged with the vertical center line of the right side of the fixed shell as the symmetry axis.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the depth gauge used for the bone screw matching instrument pushes the sliding adjustment component to drive the measuring rod and the fixing hook to move downward into the bone screw hole on the patient's bone through the limiting rotation mechanism to hook and fix, pushes the adjusting fixing component to squeeze the elastic limiting mechanism, pushes the fixing shell downward to drive the adjusting fixing component to enter the bone screw hole, and pushes the adjusting fixing component to fit and fix with the inner wall of the bone screw hole through the rebound force of the elastic limiting mechanism, so that the fixing shell can be vertically fixed above the bone screw hole to perform depth measurement; the goal of facilitating improving the measurement accuracy of the depth gauge is achieved, and the inevitable deviation during measurement caused by the difficulty of vertically fixing the existing depth gauge above the bone screw hole is avoided, thereby greatly reducing the problem of bone screw adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the structural survey drawing of the utility model;

[0016] Figure 2 It is a left sectional view of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure A of the utility model;

[0018] Figure 4 It is a partial structural sectional view of the utility model;

[0019] Figure 5 This is an enlarged view of the structure B of the utility model.

[0020] In the figure: 1. Fixed shell; 2. Limit slide groove; 3. Limit hole; 4. Measuring rod; 5. Fixed hook; 6. Fixed seat; 7. Fixed cylinder; 8. Limit slide sleeve; 9. Fixed ring; 10. Connecting slider; 11. Adjusting button; 12. Connecting shaft; 13. Limit disk; 14. Spring; 15. Positioning plate; 16. Connecting plate; 17. Push plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Reference Figure 1-5A depth gauge for a bone screw supporting instrument comprises a fixed shell 1, a limited sliding groove 2 is arranged on the front of the fixed shell 1, a limited hole 3 is arranged on the inner wall of the fixed shell 1, a measuring rod 4 is slidably connected to the inner wall of the fixed shell 1, a fixing hook 5 is fixedly connected to the bottom end of the measuring rod 4, a fixing seat 6 is fixedly connected to the bottom surface of the fixed shell 1, a fixing cylinder 7 is fixedly connected to the inner wall of the fixing seat 6, the fixing cylinder 7 is circular in shape, and the fixing cylinder 7 is made of metal material. The fixing cylinder 7 made of metal material has higher strength, is not easy to deform and damage after being subjected to force, and is more durable. A limited rotation mechanism is arranged inside the limited hole 3, and the limited rotation mechanism is composed of a limited sliding sleeve 8 and a fixed ring 9. The limited sliding sleeve 8 is slidably connected to the inner wall of the limited hole 3, and the inner wall of the limited sliding sleeve 8 is rotatably connected to the surface of the measuring rod 4, and the fixed ring 9 inner wall is fixedly connected to the surface of the measuring rod 4, and the fixing ring 9 is rotatably connected to the inner wall of the limiting sleeve 8, which is used to connect and fix the measuring rod 4, so as to facilitate rotating the measuring rod 4 to adjust the fixed angle. A sliding adjustment component is arranged inside the limiting slide 2, and the sliding adjustment component is composed of a connecting slider 10 and an adjusting button 11. The connecting slider 10 is slidably connected to the inner wall of the limiting slide 2, and the inner wall of the connecting slider 10 is fixedly connected to the surface of the limiting sleeve 8. The adjusting button 11 is fixedly connected to the front of the connecting slider 10, and the adjusting button 11 is slidably connected to the front of the fixed shell 1, which is used to drive the measuring rod 4 to extend and retract, so as to facilitate depth measurement. An elastic limiting mechanism is arranged inside the fixed cylinder 7, and the elastic limiting mechanism is composed of a connecting shaft 12, a limiting disk 13 and a spring 14. The connecting shaft 12 is slidably connected to the inner wall of the fixed cylinder 7, the limiting plate 13 is fixedly connected to the surface of the connecting shaft 12, and the limiting plate 13 is slidably connected to the inner wall of the fixed cylinder 7, and the spring 14 is fixedly connected to the surface of the limiting plate 13, which is used to limit and fix the adjustment fixing component, thereby improving the movement stability. An adjustment fixing component is arranged on the bottom surface of the fixed shell 1, and the adjustment fixing component is composed of a positioning plate 15, a connecting plate 16 and a push plate 17. There are multiple positioning plates 15, and multiple positioning plates 15 are symmetrically arranged with the vertical center line of the right side of the fixed shell 1 as the symmetry axis, which are used for positioning and fixing work, thereby improving the positioning accuracy. The positioning plate 15 is slidably connected to the bottom surface of the fixed shell 1, the connecting plate 16 is fixedly connected to the surface of the positioning plate 15, and the inner wall of the connecting plate 16 is connected to the surface of the connecting shaft 12 The fixed connection is that the inner wall of the push plate 17 is fixedly connected with the surface of the positioning plate 15, which is used to limit the fixed shell 1, thereby improving the measurement accuracy. The sliding adjustment component is pushed to drive the measuring rod 4 and the fixing hook 5 to move downward through the limiting rotation mechanism into the bone screw hole on the patient's bone to hook and fix. The adjustment fixing component is pushed to squeeze the elastic limiting mechanism, and the fixed shell 1 is pushed downward to drive the adjustment fixing component to enter the bone screw hole. The elastic limiting mechanism is used to push the adjustment fixing component to fit and fix the inner wall of the bone screw hole, so that the fixed shell 1 can be vertically fixed above the bone screw hole for depth measurement, thereby achieving the goal of facilitating the improvement of the measurement accuracy of the depth gauge, and avoiding the inevitable deviation in measurement caused by the difficulty of vertically fixing the existing depth gauge above the bone screw hole.The problem of bone screw fit is greatly reduced.

[0023] When in use: first push the adjustment button 11 downward to drive the connecting slider 10 and the limiting sleeve 8 to slide downward along the limiting slot 2 and the inner wall of the limiting hole 3 respectively, and the movement of the limiting sleeve 8 drives the fixing ring 9 and the measuring rod 4 to slide downward along the inner wall of the fixed shell 1, and the movement of the measuring rod 4 drives the fixing hook 5 to move downward into the bone screw hole on the patient's bone, and adjust the fixing direction by rotating the measuring rod 4 and the fixing hook 5, and hook the other end of the patient's bone through the fixing hook 5, and push the push plate 17 to push the connecting shaft 12 and the limiting plate 13 to slide along the inner wall of the fixing tube 7 through the positioning plate 15 and the connecting plate 16, and at the same time squeeze the spring 14, push the fixed shell 1 downward to drive the positioning plate 15 to enter the bone screw hole, release the push plate 17, and push the positioning plate 15 to fit and fix with the inner wall of the bone screw hole through the rebound force of the spring 14, so that the fixed shell 1 can be vertically fixed above the bone screw hole for depth measurement.

[0024] To summarize, the depth gauge used in the bone screw supporting instrument pushes the sliding adjustment component to drive the measuring rod 4 and the fixing hook 5 to move downward into the bone screw hole on the patient's bone through the limiting rotation mechanism to hook and fix, pushes the adjusting fixing component to squeeze the elastic limiting mechanism, pushes the fixing shell 1 downward to drive the adjusting fixing component to enter the bone screw hole, and pushes the adjusting fixing component to fit and fix with the inner wall of the bone screw hole through the rebound force of the elastic limiting mechanism, so that the fixing shell 1 can be vertically fixed above the bone screw hole for depth measurement, thereby achieving the goal of facilitating improving the measurement accuracy of the depth gauge, avoiding the inevitable deviation during measurement due to the difficulty of vertically fixing the existing depth gauge above the bone screw hole, greatly reducing the problem of bone screw adaptability, and is used to solve the problems raised in the above-mentioned background technology.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A depth gauge for a bone screw supporting instrument, comprising a fixed housing (1), characterized in that: The front of the fixed shell (1) is provided with a limit slot (2), the inner wall of the fixed shell (1) is provided with a limit hole (3), the inner wall of the fixed shell (1) is slidably connected with a measuring rod (4), the bottom end of the measuring rod (4) is fixedly connected with a fixing hook (5), the bottom surface of the fixed shell (1) is fixedly connected with a fixing seat (6), the inner wall of the fixing seat (6) is fixedly connected with a fixing cylinder (7), a limit rotation mechanism is arranged inside the limit hole (3), a sliding adjustment component is arranged inside the limit slot (2), an elastic limit mechanism is arranged inside the fixing cylinder (7), and an adjustment fixing component is arranged on the bottom surface of the fixed shell (1).

2. A depth gauge for a bone screw supporting instrument according to claim 1, characterized in that: The limit rotation mechanism is composed of a limit sleeve (8) and a fixed ring (9); the limit sleeve (8) is slidably connected to the inner wall of the limit hole (3), and the inner wall of the limit sleeve (8) is rotationally connected to the surface of the measuring rod (4); the inner wall of the fixed ring (9) is fixedly connected to the surface of the measuring rod (4), and the fixed ring (9) is rotationally connected to the inner wall of the limit sleeve (8).

3. A depth gauge for a bone screw supporting instrument according to claim 1, characterized in that: The sliding adjustment component is composed of a connecting slider (10) and an adjustment button (11); the connecting slider (10) is slidably connected to the inner wall of the limiting sliding groove (2), and the inner wall of the connecting slider (10) is fixedly connected to the surface of the limiting sliding sleeve (8); the adjustment button (11) is fixedly connected to the front of the connecting slider (10), and the adjustment button (11) is slidably connected to the front of the fixed housing (1).

4. A depth gauge for a bone screw supporting instrument according to claim 1, characterized in that: The elastic limiting mechanism is composed of a connecting shaft (12), a limiting plate (13) and a spring (14); the connecting shaft (12) is slidably connected to the inner wall of the fixed cylinder (7); the limiting plate (13) is fixedly connected to the surface of the connecting shaft (12); the limiting plate (13) is slidably connected to the inner wall of the fixed cylinder (7); and the spring (14) is fixedly connected to the surface of the limiting plate (13).

5. The depth gauge for bone screw matching instrument according to claim 1, characterized in that: The adjusting and fixing assembly is composed of a positioning plate (15), a connecting plate (16) and a push plate (17); the positioning plate (15) is slidably connected to the bottom surface of the fixed shell (1); the connecting plate (16) is fixedly connected to the surface of the positioning plate (15); the inner wall of the connecting plate (16) is fixedly connected to the surface of the connecting shaft (12); and the inner wall of the push plate (17) is fixedly connected to the surface of the positioning plate (15).

6. A depth gauge for a bone screw supporting instrument according to claim 1, characterized in that: The fixing tube (7) is circular in shape and is made of metal material.

7. The depth gauge for bone screw matching instrument according to claim 5, characterized in that: There are multiple positioning plates (15), and the multiple positioning plates (15) are symmetrically arranged with the right vertical center line of the fixed shell (1) as the symmetry axis.

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