Bone needle fixator

Abstract

The utility model relates to a bone needle fixator. The bone needle fixator comprises a shell, a bone needle fixing device and a fixing device, a cavity is formed in the shell, bone needle holes are formed in the end face of the shell and communicated with the cavity, the bone needle holes comprise the first bone needle hole, the second bone needle hole and the third bone needle hole, and a threaded hole communicated with the cavity is formed in the side wall of the shell; the fastening screw is matched with the threaded hole of the shell; the first sliding piece is arranged in the cavity in a sliding mode, and the fastening screw can drive the first sliding piece to slide; the second sliding part is arranged in the cavity in a sliding mode, the first sliding part and the second sliding part can jointly press bone needles in the first bone needle hole and the second bone needle hole, and the second sliding part and the shell can jointly press bone needles in the third bone needle hole. The fixing device is fixed through a plurality of bone needles, and the stability of the tracer is improved.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a bone needle fixator. Background Art

[0002] In orthopedic surgery, two bone pins are usually placed into the bone surface, a fixator is installed on the bone pins, and then a tracer is connected to the fixator so that the surgical robot can identify the patient's surgical position by identifying the tracer. This fixation method is feasible in surgeries with low vibration levels, but it is not reliable enough when the vibration level is high. For example, in hip replacement surgery, the double-needle fixator is easy to loosen, which causes the patient's tracer to loosen, affecting the operation. Utility Model Content

[0003] Based on the above problems, the present application provides a bone needle fixator, which is fixed by multiple bone needles to improve the safety of surgery.

[0004] In order to achieve the above effects, the technical solutions adopted in this application are as follows:

[0005] A bone pin fixator, characterized by comprising:

[0006] A shell body, wherein a cavity is provided inside, an end surface of the shell body is provided with bone pin holes, the bone pin holes are connected with the cavity, the bone pin holes include a first bone pin hole, a second bone pin hole and a third bone pin hole, and a side wall of the shell body is provided with a threaded hole connected with the cavity;

[0007] A fastening screw adapted to the threaded hole of the housing;

[0008] A first sliding member is slidably disposed in the cavity, and the fastening screw can drive the first sliding member to slide;

[0009] The second sliding member is slidably disposed in the cavity, the first sliding member and the second sliding member can jointly compress the bone needles in the first bone needle hole and the second bone needle hole, and the second sliding member and the shell can jointly compress the bone needles in the third bone needle hole.

[0010] According to some embodiments of the present application, the first sliding member is provided with a screw hole, and the end of the fastening screw is located in the screw hole;

[0011] The end of the fastening screw is provided with a pin groove;

[0012] The bone pin fixator further includes a pin disposed on the first sliding member, wherein a portion of the pin enters the pin slot so that the fastening screw is rotatably connected to the first sliding member.

[0013] According to some embodiments of the present application, the bone pin fixator further includes:

[0014] A first elastic member, disposed between the first sliding member and the second sliding member;

[0015] The second elastic member is arranged between the second sliding member and the inner wall of the cavity.

[0016] According to some embodiments of the present application, the second sliding member is provided with a first bone needle groove, and the first bone needle groove is located on the surface of the bone needle that is jointly pressed by the second sliding member and the first sliding member.

[0017] According to some embodiments of the present application, the shell is provided with a second bone needle groove, and the second bone needle groove is located on the hole wall of the third bone needle hole.

[0018] According to some embodiments of the present application, the housing includes:

[0019] The upper shell is provided with a receiving groove with an open end;

[0020] A shell cover closes the opening of the receiving groove to form the cavity.

[0021] According to some embodiments of the present application, a boss is provided on a side wall of the upper shell away from the shell cover, and the threaded hole is located on the boss.

[0022] According to some embodiments of the present application, both the first bone pin hole and the second bone pin hole are waist holes.

[0023] According to some embodiments of the present application, the outer wall of the shell is provided with a connector for connecting a tracer.

[0024] According to some embodiments of the present application, a cleaning hole is provided on the end surface of the shell, and the cleaning hole is connected to the cavity.

[0025] The bone needle fixator of the present application can compress at least three bone needles by rotating the fastening screws. The at least three bone needles provide stable support for the bone needle fixator, thereby preventing the tracer from loosening under high vibration conditions and improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without exceeding the scope of protection required by the present application.

[0027] Figure 1 is a schematic diagram of a bone pin fixator according to an embodiment of the present application;

[0028] Figure 2 is a cross-sectional view of a bone pin fixator according to an embodiment of the present application;

[0029] Figure 3 This is a schematic diagram of the housing of the embodiment of the present application. Figure 1 ;

[0030] Figure 4 is a schematic diagram of the bone needle fixator according to an embodiment of the present application pressing the bone needle;

[0031] Figure 5 is an exploded view of the connection between the fastening screw and the first sliding member of the embodiment of the present application;

[0032] Figure 6 is a schematic diagram of a first elastic member and a second elastic member in an embodiment of the present application;

[0033] Figure 7 is a cross-sectional view of a second sliding member of an embodiment of the present application;

[0034] Figure 8 This is a schematic diagram of the housing of the embodiment of the present application. Figure 2 ;

[0035] Fig. 9 It is an exploded view of the shell of the embodiment of the present application. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] like Figure 1 and Figure 2 As shown, the embodiment of the present application provides a bone needle fixer 100, which includes: a housing 1, a fastening screw 2, a first sliding member 3, and a second sliding member 4. The fastening screw 2 drives the first sliding member 3 to slide, and the first sliding member 3 can push the second sliding member 4 to slide. The housing 1, the first sliding member 3, and the second sliding member 4 cooperate to press a plurality of bone needles to achieve the connection between the bone needle fixer 100 and the bone needles. A tracer (not shown in the figure) is installed on the bone needle fixer 100.

[0038] like Figure 3As shown, a cavity 11 is provided inside the shell 1. A bone pin hole 12 is provided on the end surface of the shell 1, and the bone pin hole 12 passes through both ends of the shell 1, and the bone pin hole 12 is connected to the cavity 11. The bone pin hole 12 includes a first bone pin hole 121, a second bone pin hole 122 and a third bone pin hole 123. Optionally, the first bone pin hole 121 and the second bone pin hole 122 are respectively located on both sides of the third bone pin hole 123. A threaded hole 13 connected to the cavity 11 is provided on the side wall of the shell 1.

[0039] The fastening screw 2 is matched with the threaded hole 13 of the housing 1. Optionally, a nut is provided at the top of the fastening screw 2 so as to rotate the fastening screw 2.

[0040] like Figure 2 As shown, the long side direction of the housing 1 is the X direction, and the short side direction of the housing 1 is the Y direction. The first sliding member 3 is slidably disposed in the cavity 11, and the first sliding member 3 can slide along the Y direction. The fastening screw 2 is used to drive the first sliding member 2 to slide.

[0041] The second sliding member 4 is slidably disposed in the cavity 11 and can slide along the Y direction. The second sliding member 4 is located on the side of the first sliding member 3 away from the threaded hole 13. The first sliding member 3 can push the second sliding member 4 to slide in a direction away from the threaded hole 13.

[0042] like Figure 4 As shown, bone needles are arranged in the bone needle hole 12 , for example, the first bone needle 210 is inserted into the first bone needle hole 121 , the second bone needle 220 is inserted into the second bone needle hole 122 , and the third bone needle 230 is inserted into the third bone needle hole 123 .

[0043] By turning the fastening screw 2, the fastening screw 2 pushes the first sliding member 3 to slide in the direction away from the threaded hole 13, and the side wall of the first sliding member 3 abuts the first bone needle 210 and the second bone needle 220, so that the first bone needle 210 and the second bone needle 220 respectively abut the second sliding member 4 and push the second sliding member 4 to slide in the direction away from the threaded hole 13, and the second sliding member 4 and the wall of the third bone needle hole 123 of the shell 1 jointly press the third bone needle 230, and the first sliding member 3 and the second sliding member 4 jointly press the first bone needle 210 and the second bone needle 220, thereby realizing the connection between the bone needle fixer 100 and multiple bone needles.

[0044] When the bone needle holder 100 needs to be removed, the fastening screw 2 is rotated in the reverse direction to unlock the connection between the bone needle holder 100 and the plurality of bone needles.

[0045] In this embodiment, the tips of multiple bone needles are respectively placed in the bone, and the bone needle holder 100 clamps the multiple bone needles, and the multiple bone needles provide stable support for the bone needle holder 100. The tracer is installed on the bone needle holder 100 to ensure the stability of the tracer under high vibration conditions and improve the safety of the operation.

[0046] like Figure 2 and Figure 5 As shown, in some embodiments, the first sliding member 3 is provided with a screw hole 31 adapted to the fastening screw 2, the screw hole 31 is located on the surface of the first sliding member 3 close to the threaded hole 13, and the end of the fastening screw 2 is located in the screw hole 31. The first sliding member 3 is also provided with a pin hole 32, which is connected to the screw hole 31.

[0047] A pin groove 21 is provided on the outer wall of the end of the fastening screw 2 located in the screw hole 31. The bone pin fixator 100 further includes a pin 5, which is located in the pin hole 32, and a portion of the pin 5 enters the pin groove 21 of the fastening screw 2, so that the fastening screw 2 is rotatably connected to the first sliding member 3, so that the fastening screw 2 pushes the first sliding member 3. Optionally, the number of the pins 5 is two, and the two pins 5 are respectively located on both sides of the fastening screw 2.

[0048] like Figure 2 and Figure 6 As shown, in some embodiments, the bone pin fixator 100 further includes: a first elastic member 61 and a second elastic member 62, and optionally, the first elastic member 61 and the second elastic member 62 are both springs. The first elastic member 61 is disposed between the first sliding member 3 and the second sliding member 4. The second elastic member 62 is disposed between the second sliding member 4 and the inner wall of the cavity 11.

[0049] When the fastening screw 2 is turned to compress the bone needle, the sliding of the first sliding member 3 and the second sliding member 4 compresses and deforms the first elastic member 61 and the second elastic member 62. When the fastening screw 2 is turned to unlock the bone needle, the second elastic member 62 pushes the second sliding member 4 to reset, and the first elastic member 61 pushes the first sliding member 3 to reset.

[0050] like Figure 7 As shown, optionally, a first elastic member hole 41 is provided on the surface of the second sliding member 4 close to the first sliding member 3, and the end of the first elastic member 61 is located in the first elastic member hole 41. A second elastic member hole 42 is provided on the surface of the second sliding member 4 away from the first sliding member 3, and the end of the second elastic member 62 is located in the second elastic member hole 42. The first elastic member hole 41 and the second elastic member hole 42 are provided on the second sliding member 4 to facilitate positioning of the first elastic member 61 and the second elastic member 62.

[0051] In some embodiments, the second sliding member 4 is provided with a first bone needle groove 43, and the first bone needle groove 43 is located on the surface of the second sliding member 4 and the first sliding member 3 that press the bone needle together. For example, a first bone needle groove 43 is provided on the surface of the second sliding member 4 that presses the first bone needle 210, and a first bone needle groove 43 is provided on the surface of the second sliding member 4 that presses the second bone needle 220. When pressing the bone needles, the first bone needle 210 and the second bone needle 220 respectively partially enter the corresponding first bone needle groove 43, which is more conducive to the bone needle fixture 100 pressing the first bone needle 210 and the second bone needle 220.

[0052] like Figure 8 As shown, in some embodiments, the housing 1 is provided with a second bone needle groove 14, and the second bone needle groove 14 is located on the hole wall of the third bone needle hole 123. When the second sliding member 4 and the housing 1 jointly press the third bone needle 230, the third bone needle 230 partially enters the second bone needle groove 14, which facilitates the pressing of the third bone needle 230.

[0053] like Fig. 9 As shown, in some embodiments, the housing 1 includes: an upper shell 15 and a shell cover 16. The upper shell 15 is provided with a receiving groove 151 with one end open, and the shell cover 16 closes the opening of the receiving groove 151 to form a cavity 11. Optionally, the shell cover 16 is bonded to the upper shell 15. The bone pin hole 12 is provided in the upper shell 15.

[0054] like Figure 8 As shown, in some embodiments, a side wall of the upper shell 15 away from the shell cover 16 is provided with a boss 17, and the threaded hole 13 is located on the boss 17. The boss 17 is provided to lengthen the length of the threaded hole 13, and to facilitate the stable connection between the fastening screw 2 and the threaded hole 13.

[0055] In some embodiments, during the compression of the bone needle, the first bone needle 210 and the second bone needle 220 slide slightly relative to the housing 1. The first bone needle hole 121 and the second bone needle hole 122 are both waist holes. The long side of the waist hole is parallel to the Y direction, which facilitates the first bone needle 210 and the second bone needle 220 to slide relative to the housing 1.

[0056] In some embodiments, a connector 7 for connecting a tracer is disposed on the outer wall of the housing 1. Optionally, connectors 7 are disposed on both opposite side walls of the housing 1, and the operator can select the installation position of the tracer according to the requirements.

[0057] In some embodiments, a cleaning hole 18 is disposed on the end surface of the housing 1 , and the cleaning hole 18 is connected to the cavity 11 to facilitate disinfection and cleaning of the bone pin fixator 100 .

[0058] The embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core ideas of the present application. Therefore, changes or deformations made by those skilled in the art based on the ideas of the present application, the specific implementation methods and the scope of application of the present application, all belong to the scope of protection of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

1. A bone pin fixator, characterized in that: include: A shell body, wherein a cavity is provided inside, an end surface of the shell body is provided with bone pin holes, the bone pin holes are connected with the cavity, the bone pin holes include a first bone pin hole, a second bone pin hole and a third bone pin hole, and a side wall of the shell body is provided with a threaded hole connected with the cavity; A fastening screw adapted to the threaded hole of the housing; A first sliding member is slidably disposed in the cavity, and the fastening screw can drive the first sliding member to slide; The second sliding member is slidably disposed in the cavity, the first sliding member and the second sliding member can jointly compress the bone needles in the first bone needle hole and the second bone needle hole, and the second sliding member and the shell can jointly compress the bone needles in the third bone needle hole.

2. The bone pin fixator according to claim 1, characterized in that: The first sliding member is provided with a screw hole, and the end of the fastening screw is located in the screw hole; The end of the fastening screw is provided with a pin groove; The bone pin fixator further includes a pin disposed on the first sliding member, and a portion of the pin enters the pin slot so that the fastening screw can be rotatably connected to the first sliding member.

3. The bone pin fixator according to claim 1, characterized in that: Also includes: A first elastic member, disposed between the first sliding member and the second sliding member; The second elastic member is arranged between the second sliding member and the inner wall of the cavity.

4. The bone pin fixator according to claim 1, characterized in that: The second sliding member is provided with a first bone needle groove, and the first bone needle groove is located on the surface of the second sliding member and the first sliding member that jointly press the bone needle.

5. The bone pin fixator according to claim 1, characterized in that: The shell is provided with a second bone needle groove, and the second bone needle groove is located on the hole wall of the third bone needle hole.

6. The bone pin fixator according to claim 1, characterized in that: The housing comprises: The upper shell is provided with a receiving groove with an open end; A shell cover closes the opening of the receiving groove to form the cavity.

7. The bone pin fixator according to claim 6, characterized in that: A boss is disposed on the side wall of the upper shell away from the shell cover, and the threaded hole is located on the boss.

8. The bone pin fixator according to claim 1, characterized in that: The first bone pin hole and the second bone pin hole are both waist holes.

9. The bone pin fixator according to claim 1, characterized in that: The outer wall of the shell is provided with a connector for connecting a tracer.

10. The bone pin fixator according to claim 1, characterized in that: The end surface of the shell is provided with a cleaning hole, and the cleaning hole is connected to the cavity.

Images