A nail holder

Abstract

The present invention provides a nail holder, belonging to the technical field of medical devices, comprising: a shell having a first through hole for a knife rod to pass through, the first through hole having a clamping unit for clamping the knife rod; a nail holding unit connected to the head of the shell, the nail holding unit having a second through hole for accommodating a screw, the second through hole and the first through hole being coaxially arranged; the aperture of the second through hole is at least partially smaller than the nut diameter of the screw, when the screw is clamped in the second through hole and driven to extend outward from the second through hole, the second through hole is squeezed and expanded radially outward; the nail holder of the present invention is used to connect with a screwdriver and a screw respectively, after connection, when the screw is pushed by the knife rod of the screwdriver, the screw can be pushed out of the nail holder, thereby performing surgical operations, when the nail holder is produced, since there is no need to produce a screwdriver, the production cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a nail holder. Background Art

[0002] Bone screws are used in various surgeries, such as: skull gap repair fixation, brain-computer interface fixation, medical aesthetic implant fixation, cochlear implant fixation, deep brain stimulation implant fixation, etc. During such surgeries, the screws need to be screwed into the fixed holes with a matching screwdriver. The screwdriver and the screw need to be matched, and the doctor needs to hold the screws by hand, which is not very convenient and will block the line of sight.

[0003] Chinese patent document CN2217962Y discloses a nail-holding medical screwdriver, which clamps a bone screw through a sleeve and screws the bone screw through a tool rod, thereby eliminating the need to hold the bone screw with another hand, thereby improving operational convenience.

[0004] However, the above-mentioned nail holding product integrates the sleeve and the knife rod together, resulting in a high cost for producing the nail holding product. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of high production cost of nail holding products in the prior art, thereby providing a nail holder.

[0006] In order to solve the above technical problems, the present invention provides a nail holder, comprising:

[0007] A housing having a first through hole for the knife rod to pass through, wherein the first through hole has a clamping unit for clamping the knife rod;

[0008] A nail holding unit connected to the head of the shell, wherein the interior of the nail holding unit has a second through hole for accommodating a screw, and the second through hole is coaxially arranged with the first through hole;

[0009] The aperture of the second through hole is at least partially smaller than the nut diameter of the screw. When the screw is clamped in the second through hole and driven to extend outward from the second through hole, the second through hole is squeezed to expand radially outward.

[0010] Optionally, the nail holding unit is composed of an elastic member, and when the screw is driven to extend outward from the second through hole, the elastic member is compressed by the screw in the radial direction of the second through hole.

[0011] Optionally, the nail holding unit is composed of at least two protective arms, and when the screw is driven to extend outward from the second through hole, the protective arms are separated and open radially outward toward the second through hole.

[0012] Optionally, the protection arms are connected to the head of the shell through extension rods, respectively, and when the screw is driven to extend outward from the second through hole, the extension rods bend radially outward in the direction of the second through hole.

[0013] Optionally, the extension rod is symmetrically arranged on the head of the shell.

[0014] Optionally, the shell is an openable two-flap structure, specifically comprising a first half shell and a second half shell, and the first half shell and / or the second half shell are connected to the protective arm via an extension rod.

[0015] Optionally, the first half shell and the second half shell have the same structure, and the first half shell and the second half shell are respectively connected to at least one of the protection arms via at least one of the extension rods.

[0016] Optionally, a connecting surface between the first half shell and the second half shell and a connecting surface between two lobes of the protective arm are arranged at an angle.

[0017] Optionally, the clamping unit is a protruding piece provided in the first through hole, and the knife rod is clamped in the first through hole through the protruding piece.

[0018] Optionally, at least two protruding pieces are symmetrically arranged in the first through hole.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. The nail holder provided by the present invention is used to connect with the knife bar and the screw respectively. After the connection, when the screw is pushed by the knife bar of the screwdriver, the screw can be pushed out of the nail holder, so as to perform surgical operations. When producing the nail holder, since there is no need to produce the screwdriver, the production cost can be reduced.

[0021] 2. In the nail holder provided by the present invention, the protective arm is connected to the shell through an extension rod. When the screw squeezes the inner wall of the protective arm, the protective arm is less constrained by the shell and is therefore easier to elastically expand, thereby reducing the force applied during surgical operations.

[0022] 3. In the nail holder provided by the present invention, the first half shell and the second half shell of the shell are used for snap-connection, and the connecting surface between the two lobes of the protective arm and the connecting surface between the first half shell and the second half shell of the shell are set at an angle, which can avoid affecting the snap-connection firmness between the first half shell and the second half shell of the shell when the protective arm is expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of a nail holder in a first embodiment is provided in an embodiment of the present invention.

[0025] Figure 2 It is a stereoscopic view of the nail holder in the second embodiment provided in the example.

[0026] Figure 3 for Figure 2 Exploded view of the nail holder in the image.

[0027] Figure 4 It is a three-dimensional diagram of the half structure of the nail holder in the third embodiment provided in the example.

[0028] Figure 5 This is a three-dimensional diagram of the nail holder in use.

[0029] Description of reference numerals:

[0030] 1. Shell; 2. Nail holding unit; 21. Protective arm; 22. Extension piece; 3. Extension rod; 4. First through hole; 5. Protrusion; 6. Second through hole; 7. Screw; 8. Knife rod; 9. Elastic strip; 10. Buckle; 11. Slot; 12. Screw slot. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] The present embodiment provides a nail holder, which is respectively connected to a screwdriver and a screw 7 when in use. In surgical operations, the screw 7 may be a bone screw, and the screwdriver may be screwed in at various angles during the screwing process, and the screw may be screwed in longitudinally or transversely. This process requires a high degree of coordination between the screwdriver and the screw. If the screwdriver head and the screw slot are loosely matched, the screw may fall off the screwdriver directly, causing contamination and making the operation impossible to complete. The nail holder of this embodiment enables the screwdriver to more conveniently operate the screw 7 for surgery, thereby improving the convenience and safety of the operation. Specifically, the screwdriver and the screw 7 can be temporarily connected by using a nail holder, so that the screw 7 does not need to be screwed by hand, and the screw 7 can be screwed into a narrow space more conveniently and safely.

[0036] As a specific implementation, the nail holder provided in this embodiment includes two parts: a shell 1 and a nail holding unit 2. The shell 1 has a first through hole 4 for the knife rod 8 to pass through, and the first through hole 4 has a clamping unit for clamping the knife rod 8. The nail holding unit 2 is directly or indirectly connected to the head of the shell 1, and the nail holding unit 2 has a second through hole 6 for accommodating a screw 7, and the second through hole 6 and the first through hole 4 are coaxially arranged. The aperture of the second through hole 6 is at least partially smaller than the nut diameter of the screw 7. When the screw 7 is clamped in the second through hole 6 and driven to extend out of the second through hole 6, the second through hole 6 is squeezed to expand radially outward.

[0037] As a preferred embodiment, Figure 1As shown, the nail holding unit 2 of the first embodiment of the present embodiment can be directly connected to the head of the housing 1, and the connection method includes but is not limited to the connection method of achieving fixed connection or detachable connection such as plugging and bonding. In a preferred embodiment, the nail holding unit 2 can be composed of an elastic ring, and a second through hole 6 is formed in the middle of the elastic ring, so that when the screw 7 is engaged in the second through hole 6 and driven to extend outward from the second through hole 6, the elastic ring is compressed by the screw 7 in the radial direction of the second through hole 6. In another preferred embodiment, the nail holding unit 2 can be composed of a plurality of elastic protective arms 21 arranged circumferentially, and the plurality of protective arms 21 are arranged circumferentially to form the second through hole 6, so that when the screw 7 is engaged in the second through hole 6 and driven to extend outward from the second through hole 6, the protective arms 21 are separated and open radially outward toward the second through hole 6. When the screw 7 is driven, the nail holding unit 2 can maintain a stable clamping of the screw 7.

[0038] As another preferred embodiment, Figure 2-3 As shown, the nail holding unit 2 of the second embodiment of this embodiment can be indirectly connected to the head of the housing 1. Figure 3 As shown, the nail holding unit 2 is composed of two arc-shaped protective arms 21, and the middle part of the two arc-shaped protective arms 21 after combination can form the second through hole 6. The protective arm 21 is connected to the head of the shell 1 through two symmetrically arranged extension rods 3. The extension rod 3 makes the protective arm 21 away from the shell 1, so that when the protective arm 21 is expanded, it can reduce excessive constraints from the shell 1, improve the expansion flexibility of the protective arm 21, and reduce the force applied during the operation when the operation is performed. The nail holder provided in this embodiment can be injection molded by polymer materials or processed by elastic metal materials. The expansion of the protective arm 21 can be achieved by elastic deformation of the two extension rods 3 radially bending outward toward the second through hole 6. While the two symmetrically arranged extension rods 3 of the nail holder are elastically expanded as the screw 7 is rotated and pressed down, the protective arms 21 on both sides will continue to protect the screwing process of the screw 7 to prevent the screw 7 from tilting or falling off during the process.

[0039] As a preferred embodiment, Figure 2-3As shown, the extension rod 3 is connected to one end of the tail b of the protection arm 21 and to the arc-shaped middle part of the protection arm 21. The protection arm 21 has an extension piece 22 extending in the circumferential direction. When the two protection arms 21 are clamped, the extension piece 22 covers the outside of the protection arm 21. When the screw 7 is driven to rotate and press down, the two-lobed protection arm 21 gradually opens, and the extension piece 22 slides along the outer wall of the protection arm 21. The protection arms 21 on both sides will continue to protect the screw-in process of the screw 7 to prevent the screw 7 from tilting or falling off during the process. The extension piece 22 is preferably symmetrically arranged in two pieces, that is, an extension piece 22 is arranged on one side of each protection arm 21 to form a symmetrical structure.

[0040] like Figure 1-3 As shown, in the nail holder provided in the first and second embodiments, the connection surface between the two lobes of the shell 1 and the connection surface between the two lobes of the protection arm 21 are set at an angle. Since the two lobes of the shell 1 are connected by snapping, by staggering the connection surface between the two lobes of the protection arm 21 and the connection surface of the shell 1, when the two lobes of the protection arm 21 expand, the expansion of the protection arm 21 can avoid affecting the snap connection firmness between the two lobes of the shell 1. In addition, as Figure 4 As shown, as an alternative implementation, in the third implementation of this embodiment, the mating surface between the two lobes of the protective arm 21 and the connecting surface of the shell 1 can also be set in the same plane, and the two lobes of the shell 1 can also be fixedly connected by fasteners, bonding, etc.

[0041] like Figure 1-4 As shown, the shell 1 and the nail holding unit 2 of the embodiment of the present invention can both be two-flap structures. The shell 1 is an openable two-flap structure, specifically including a first half shell and a second half shell, and the first half shell and / or the second half shell are connected to the protective arm 21 through the extension rod 3. Preferably, the first half shell and the second half shell are respectively connected to at least one of the protective arms 21 through at least one of the extension rods 3. Figure 2-5 As shown, the first half shell and the second half shell have the same structure, and the first half shell and the second half shell are respectively connected to a protection arm 21 through an extension rod 3, and one side of the half shell has a buckle 10, and the other side has a slot 11. Therefore, when the two half shells are installed, they can be directly connected to each other and form a symmetrical structure that can stably clamp the screw 7. The interior of the shell 1 has a first through hole 4 for passing the knife rod 8, and the first through hole 4 has a clamping unit for clamping the knife rod 8. Preferably, as Figure 4As shown, the clamping unit includes: a protruding piece 5 capable of clamping the shank 8, the protruding piece 5 is arranged on an elastic strip 9, the two ends of the elastic strip 9 are respectively fixedly connected to the housing 1, and the two sides of the elastic strip 9 are through grooves, so that the elastic strip 9 can be elastically deformed radially; in addition, as an alternative embodiment, the elastic strip 9 can be connected to the housing 1 at only one end, and the other end of the elastic strip 9 can be a free end, which can be more conducive to the elastic deformation of the elastic strip 9. The nail holder can be directly inserted into the screwdriver shank by the elastic clamping unit with moderate resistance, so that it will not slip, and it can be easily plugged in and out.

[0042] As a preferred embodiment, the protrusion 5 has an inclined surface facing the knife rod 8, through which the knife rod 8 can be more easily inserted into the first through hole 4; the protrusion 5 can have multiple protrusions symmetrically arranged along the circumferential direction, and the multiple protrusions 5 can ensure that the knife rod 8 is clamped in the center position of the first through hole 4.

[0043] like Figure 1-4 As shown, the nail holding unit 2 has a second through hole 6 for accommodating a screw 7, and the second through hole 6 and the first through hole 4 are coaxially arranged; the second through hole 6 is a conical hole, and the larger radius end of the conical hole is arranged toward the head of the housing 1, and the aperture of the conical hole has a portion smaller than the nut diameter of the screw 7, and the screw 7 is clamped in the second through hole 6. When the screw 7 is driven to extend outward from the second through hole 6, the second through hole 6 is squeezed and expanded radially outward. In a preferred embodiment, a screw groove 12 is also provided in the nail holding unit 2, and the screw groove 12 is used to clamp the screw nut of the screw 7, so that the screw 7 is stably clamped in the second through hole 6. At the same time, by providing the screw groove 12, it can be ensured that the screw 7 and the screwdriver are accurately docked during use to prevent angle deviation during use.

[0044] like Figure 5 As shown, the nail holder provided in this embodiment can be assembled with the screw 7 before leaving the factory, and one screw 7 is equipped with one nail holder. Specifically, the screw 7 can be stably clamped in the second through hole 6 of the nail holding unit 2 through the screw groove 12 before leaving the factory, and does not need to be assembled during use. When in use, the shank 8 of the screwdriver is inserted into the first through hole 4 of the housing 1 so that the head of the screwdriver rests against the screw 7; at the same time, the shank 8 is temporarily clamped through the first through hole 4. When the shank 8 is driven downward, the shank 8 can overcome the clamping force in the first through hole 4 and move axially, thereby driving the screw 7 to extend the protective arm 21 to connect with the bone.

[0045] It should be noted that the head a and tail b described in this embodiment are as shown in the attached Figure 5The positional relationship of the nail holder shown is a simplified description for the convenience of describing the present invention. Specifically, the head a is used to connect the screw 7 and the end facing the working surface, and the tail b is the end for inserting the screwdriver.

[0046] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present invention.

Claims

1. A nail holder, characterized in that: include: A housing (1) having a first through hole (4) inside for a knife rod (8) to pass through, wherein the first through hole (4) has a clamping unit for clamping the knife rod (8); A nail holding unit (2) connected to the head of the housing (1), the interior of the nail holding unit (2) having a second through hole (6) for accommodating a screw (7), the second through hole (6) and the first through hole (4) being coaxially arranged; The nail holding unit (2) is composed of at least two protective arms (21); the shell (1) is an openable two-piece structure, specifically comprising a first half shell and a second half shell; a connecting surface is provided between the first half shell and the second half shell, a connecting surface is provided between the two halves of the protective arm (21), and the connecting surface between the first half shell and the second half shell and the connecting surface between the two halves of the protective arm (21) are arranged at an angle; The aperture of the second through hole (6) is at least partially smaller than the nut diameter of the screw (7); when the screw (7) is engaged in the second through hole (6) and driven to extend outward from the second through hole (6), the protective arms (21) are separated and open radially outward in the direction of the second through hole (6).

2. The nail holder according to claim 1, characterized in that: The nail holding unit is composed of an elastic member. When the screw (7) is driven to extend outward from the second through hole (6), the elastic member is compressed by the screw (7) in the radial direction of the second through hole (6).

3. The nail holder according to claim 1, characterized in that: The protection arms (21) are respectively connected to the head of the housing (1) via extension rods (3); when the screws (7) are driven to extend outward from the second through hole (6), the extension rods (3) bend outward in the radial direction of the second through hole (6).

4. The nail holder according to claim 3, characterized in that: The extension rod (3) is symmetrically arranged on the head of the shell (1).

5. The nail holder according to claim 3, characterized in that: The first half shell and / or the second half shell are connected to the protective arm (21) via the extension rod (3).

6. The nail holder according to claim 5, characterized in that: The first half shell and the second half shell have the same structure, and the first half shell and the second half shell are respectively connected to at least one of the protection arms (21) via at least one of the extension rods (3).

7. The nail holder according to any one of claims 1 to 6, characterized in that: The clamping unit is a protruding piece (5) arranged in the first through hole (4), and the knife rod (8) is clamped in the first through hole (4) through the protruding piece (5).

8. The nail holder according to claim 7, characterized in that: At least two protruding pieces (5) are symmetrically arranged in the first through hole (4).

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