CN219461362U

CN219461362U - Screw holder

Info

Publication number: CN219461362U
Application number: CN202220932787.5U
Authority: CN
Inventors: 孙凤龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-16
Filing date: 2022-04-16
Publication date: 2023-08-04
Anticipated expiration: 2032-04-16

Abstract

The application relates to a medical instrument, especially relates to a screw nail holder, its technical scheme main points are: the nail-holding device comprises a nail-holding rod, wherein a nail cap groove for inserting a nail cap is formed in one end of the nail-holding rod, a pressing cap block is arranged on the nail-holding rod, a pressing cap hole for placing the pressing cap block is formed in the groove wall of the nail cap groove, the pressing cap block can enter the inside of the nail cap groove through the pressing cap hole, and a resistance piece for providing resistance to the pressing cap block in the process of moving towards the outside of the nail cap groove is arranged on the nail-holding rod; the purpose of being convenient for stably grabbing the bone nails in the operation is achieved.

Description

Screw holder

Technical Field

The present application relates to medical devices, and more particularly to a screw holder.

Background

Bone nails are non-active surgical metal implants for bone engagement and generally consist of a blade portion at the leading end, a threaded body in the middle section, and a hexagonal pin cap at the trailing end. In the process of implanting the bone nail, a doctor often holds the bone nail by hand so as to lead the blade part to be aligned with the screwing position on the surface of the bone, and the blade part is gradually deeply penetrated into the bone by screwing the hexagonal nail cap; however, due to the small size of the bone nails in all aspects, great inconvenience is brought to doctors for holding the bone nails, the bone nails are easy to fall off from hands, and the accuracy of the positions of the bone nails screwed into bones is adversely affected.

Disclosure of Invention

To facilitate stable intraoperative grasping of a bone screw, the present application provides a screw holder.

The screw holder provided by the application adopts the following technical scheme:

the utility model provides a screw nail holder, includes to hold the nail pole, holds nail pole one end and has offered and supply nail cap male nail cap groove, is provided with on holding the nail pole and presses the cap piece, has offered on the cell wall of nail cap groove to supply to press the cap hole that the cap piece put into, presses the cap piece to enter into the nail cap inslot portion through pressing the cap hole, holds to be provided with on the nail pole and is used for providing the resistance spare of resistance to pressing the cap piece to the in-process that the nail cap inslot moved.

Through adopting above-mentioned technical scheme, at the in-process that the nail cap inserted the nail cap inslot, the nail cap overcome the resistance of resistance spare to pressing the cap piece effect and with pressing the ejecting nail cap groove of cap piece, until after the nail cap inserts the nail cap inslot completely, pressing the cap piece and exerting radial thrust to the nail cap under the effect of resistance spare, the nail cap then can be by stable at the inside of nail cap inslot of need not extra application holding power of doctor, and then realizes the stable grasp to the bone nail.

Optionally, the resistance component is the swinging rod that sets up in holding nail pole one side, presses the cap piece to set up on the swinging rod, is provided with elastic connection portion between elastic connection portion and the holding nail pole, and the swinging rod can be in order to drive pressing the cap piece to the interior or outside removal of cap groove at the one side of holding nail pole through elastic connection portion swing.

Through adopting above-mentioned technical scheme, elastic connection portion makes the swinging arms can be in holding the one side swing of nail pole in order to make the cap piece swing thereupon, and when the swinging arms kept away from holding the nail pole, elastic connection portion produced elastic deformation and accumulated elastic potential energy, holds the nail pole and need overcome the resistance that elastic connection portion produced, and the swinging arms continuously have the trend to being close to the nail pole direction of holding under the resistance effect of elastic connection portion.

Optionally, a deformation yielding hole is formed between the elastic connecting part and the nail holding rod.

Through adopting above-mentioned technical scheme, at swinging rod swing in-process, for the hookup location between elastic connection portion and the nail pole of holding, make the swing of swinging rod more nimble.

Optionally, the resistance component comprises a swinging rod arranged at one side of the nail holding rod and a tension spring arranged on the swinging rod, the cap pressing block is arranged on the swinging rod, and the tension spring is used for providing tension force for the swinging rod towards the direction of the nail holding rod; the nail holding rod is hinged with the swinging rod, and the swinging rod can rotate around the hinge shaft between the swinging rod and the nail holding rod so as to drive the cap pressing block to move into or out of the nail cap groove.

Through adopting above-mentioned technical scheme, the cap piece is bulldozed to the nail cap top so that press the cap piece to shift out from the nail cap groove, and the swinging arms is swung around the articulated shaft in one side of holding the nail pole in this process, need overcome the pulling force of tension spring in this process, namely the resistance of resistance part, and there is the trend to being close to the nail pole direction to the swinging arms continuously under tension spring's pulling force effect.

Optionally, a spring inserting groove for inserting a tension spring is formed in one side, close to the swing rod, of the nail holding rod, and the tension spring is stretched between the groove bottom of the spring inserting groove and the swing rod.

By adopting the technical scheme, the part of the tension spring outside the nail holding rod is reduced, and the occupation of the tension spring to the operation space is further reduced.

Optionally, the resistance component includes the briquetting board that sets up in the cap hole side of deviating from the nail cap groove and the spring ring of cover on holding the nail pole, and the shaping of cap piece is on the briquetting board and the unable through cap hole of briquetting board, and the inner circle of spring ring supports tightly in the one side that the cap piece deviates from the cap piece of pressing.

Through adopting above-mentioned technical scheme, the nail cap top bulldozes the cap piece so that press the cap piece to remove from the nail cap groove, and the pressure plate is kept away from the pressure cap hole gradually in this process, needs to overcome the spring coil because the pressure that further stretches and acts on the pressure plate piece that is the resistance of resistance member in this process, and the pressure plate continuously has the trend to being close to the pressure cap hole direction under the pressure effect of spring coil.

Optionally, a spring insertion groove for inserting a spring ring is formed on the circumferential surface of the nail holding rod and one side of the pressing block, which is away from the pressing cap block.

Through adopting above-mentioned technical scheme for axial position between spring coil and the nail pole of holding realizes fixing, has reduced the outside part of spring coil at the nail pole of holding in addition, and then has reduced the spring coil and to the occupation of operation space.

Optionally, a chamfer or a chamfer is machined on one side of the cap pressing block, which is close to the slot opening of the nut slot, and the chamfer or the chamfer is positioned on one side of the cap pressing block, which is close to the nut slot.

Through adopting above-mentioned technical scheme, reduce the probability of the in-process self tip of nail cap insertion nail cap groove and pressure cap piece butt for the edge of pressure cap piece can be slided smoothly to the nail cap.

Optionally, the edges of the notch of the nut slot are provided with chamfers or fillets.

By adopting the technical scheme, the nail cap is convenient to insert into the nail cap groove.

To sum up, this application is through having set up nail pole, nail cap groove, press the cap piece, press cap hole and resistance spare, at the in-process that the nail cap inserted nail cap inslot, the resistance of resistance spare to pressing the cap piece effect is overcome to the nail cap and with pressing the ejecting nail cap groove of cap piece, until after the nail cap inserts nail cap inslot completely, the radial thrust is applyed to the nail cap to the pressure cap piece under the effect of resistance spare, the nail cap then can be by stable at nail cap inslot portion need not extra application holding power of doctor, and then realizes the stable grasp to the bone nail.

Drawings

FIG. 1 is a schematic view of the overall structure of a screw holder according to the first embodiment, which corresponds to a state in which a nut pressing block is located outside a nut groove;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a partial cross-sectional view of the screw driver of the first embodiment, corresponding to the position of the nut block within the nut slot;

FIG. 4 is a partial enlarged view at B in FIG. 3;

FIG. 5 is a partial cross-sectional view of the screw driver of the second embodiment, corresponding to the position of the nut block outside the nut slot;

fig. 6 is a partial cross-sectional view of the screw holder of the third embodiment, which corresponds to a state in which the nut pressing block is located inside the nut groove.

In the figure, 1, a nail holding rod; 2. a nail cap groove; 3. pressing the cap block; 4. pressing the cap hole; 5. a swinging rod; 6. an elastic connection part; 7. deformation abdication holes; 8. a tension spring; 9. the spring is placed in the groove; 10. pressing a block plate; 11. and (5) a spring ring.

Detailed Description

In the description of the present application, it should be noted that the terms "close," "remote," and the like are based on the relative relationships illustrated in the drawings, and are merely for convenience in describing the present utility model and to simplify the description, rather than to indicate or imply that the processes or modules referred to must have a specific orientation, state, and operation, and thus should not be construed as limiting the present utility model.

The present application is described in further detail below with reference to the accompanying drawings.

Embodiment one:

referring to fig. 1 to 4, the application provides a screw holder, which comprises a screw holding rod 1, a cap pressing block 3 and a resistance piece, wherein a cap slot 2 for the fit insertion of a hexagonal cap is formed in one end face of the screw holding rod 1, and a power head is formed at the other end of the screw holding rod 1 to be matched with a power tool capable of providing torque to screw a bone screw; the slot wall of the nut slot 2 is provided with a through nut pressing hole 4, the nut pressing hole 4 can be used for the nut pressing block 3 to pass through and enter the nut slot 2, and the resistance piece acts on the nut pressing block 3 to resist the resistance of the nut pressing block 3 moving out of the nut slot 2.

Referring to fig. 4, when the nut is not inserted into the nut groove 2, the nut pressing block 3 is pressed into the nut pressing hole 4 by the nut pressing block 3 under the action of the resistance member; in the process of inserting the nail cap into the nail cap groove 2, the nail cap overcomes the resistance of the resistance piece to the action of the cap pressing block 3 and ejects the cap pressing block 3 out of the nail cap groove 2 until the nail cap is completely inserted into the nail cap groove 2, the cap pressing block 3 applies radial thrust to the nail cap under the action of the resistance piece, and the nail cap can be stabilized in the nail cap groove 2 without applying extra supporting force by a doctor, so that the stable grasping of the bone nail is realized; the nail holding rod 1 is screwed to enable the bone nail to be screwed into the bone, after the bone nail is fixed, the nail holding rod 1 is lifted to overcome the friction force between the nail cap and the groove wall of the nail cap groove 2 and the pressing cap block 3 until the nail cap is discharged from the nail cap groove 2, and the separation of the nail holding rod 1 and the bone nail is easily realized.

Referring to fig. 3, in this embodiment, the resistance member includes a swing rod 5 disposed on one side of the nail holder 1, and an elastic connection portion 6 for connecting the swing rod 5 and the nail holder 1, where the elastic connection portion 6 can prevent the swing rod 5 from being away from the nail holder 1, and the swing rod 5 is attached to the nail holder 1 when the nut is not pressed against the nut pressing block 3; when the nut presses the nut pressing block 3, the nut pressing block 3 transmits torque to the swinging rod 5, so that the swinging rod 5 swings around the position of the elastic connecting part 6, the elastic connecting part 6 elastically deforms and continuously acts on the swinging rod 5 to resist the elastic force, namely the resistance force, in the direction close to the nail holding rod 1, and the swinging rod 5 continuously applies force to the nut pressing block 3 to enable the nut pressing block 3 to press the nut in the nut groove 2; the whole nail holder can be made of elastic materials such as medical rubber.

A round deformation abdication hole 7 is arranged between the elastic connecting part 6 and the nail holding rod 1, and the deformation abdication hole 7 correspondingly contracts or expands in the swinging process of the swinging rod 5 so as to provide a deformable space for the elastic connecting part 6; in addition, when the nut is blocked in the nut groove 2 under the action of the nut pressing block 3 and is difficult to pull out, the position of the deformation abdication hole 7 is pressed to compress the elastic connecting portion 6, one end of the swinging rod 5, which is far away from the elastic connecting portion 6, is further tilted, the nut pressing block 3 is moved out of the nut groove 2, and the nut is conveniently pulled out of the nut groove 2.

Referring to fig. 4, in order to facilitate insertion of the nut into the nut groove 2, a chamfer is machined at the edge of the notch of the nut groove 2; in addition, one side processing that the pressure cap piece 3 is close to the notch of the nail cap groove 2 has the chamfer, and the chamfer is located the one side that the pressure cap piece 3 is close to the nail cap groove 2, and at the in-process that the nail cap moved to being close to the bottom of the nail cap groove 2, the tip of nail cap tends to produce the contact with the pressure cap piece 3, and the chamfer on the pressure cap piece 3 effectively reduces the possibility of the in-process self tip and the pressure cap piece 3 butt of nail cap insertion nail cap groove 2, and the edge of pressure cap piece 3 can then be smoothly slided to the nail cap.

At one end of the nail holding rod 1, which is close to the nail cap groove 2, the nail holding rod 1 and the resistance piece form a taper structure together, and the diameter of the taper structure is gradually reduced along the direction gradually approaching to the nail cap groove 2; thus, the occupation of the end part of the nail holder to the operation space around the bones or human tissues is effectively reduced in the process of screwing the bone nails.

Embodiment two:

referring to fig. 5, the present embodiment differs from the first embodiment in that the resistance member includes a swing lever 5 provided at one side of the nail holding lever 1 and a tension spring 8 provided on the swing lever 5; the side of the nail holding rod 1, which is close to the swinging rod 5, is provided with a spring placing groove 9 into which a tension spring 8 is inserted, one end of the tension spring 8 is fixed at the bottom of the spring placing groove 9, the other end of the tension spring is fixed at the side of the swinging rod 5, which is close to the nail holding rod 1, and the tension spring 8 is stretched between the bottom of the spring placing groove 9 and the swinging rod 5; a hinge shaft with the axis perpendicular to the moving direction of the cap pressing block 3 is arranged between the swinging rod 5 and the nail holding rod 1, and the swinging rod 5 and the nail holding rod 1 are hinged with each other through the hinge shaft.

When the nut presses the nut pressing block 3, the nut pressing block 3 transmits torque to the swinging rod 5, so that the swinging rod 5 swings around the hinge shaft, the tension spring 8 is further deformed and stretched and acts on the swinging rod 5 continuously to apply force to the nut pressing block 3, so that the nut pressing block 3 presses the nut in the nut groove 2.

Embodiment III:

referring to fig. 6, the difference between the present embodiment and the first embodiment is that the resistance member is different from the first embodiment, in the present embodiment, the resistance member includes a pressing plate 10 integrally formed with the pressing cap block 3 and a spring ring 11 sleeved on the nail holding rod 1, the pressing plate 10 is located at one side of the pressing cap block 3 deviating from the nail cap groove 2, the pressing plate 10 and the nail holding rod 1 together form a rotation surface, and the circumferential surfaces of the pressing plate 10 and the nail holding rod 1 are jointly provided with an annular spring placing groove 9, the spring ring 11 is embedded in the spring placing groove 9 and is in a stretching state at any time, the cross section area of the pressing plate 10 is larger than the area of the pressing cap hole 4 and cannot pass through the pressing cap hole 4, so that one side of the pressing plate 10 deviating from the pressing cap block 3 is in contact with the inner ring of the spring ring 11 at any time.

When the nut presses the nut pressing block 3, the nut pressing block 3 moves along with the pressing block plate 10 in a direction away from the axis of the nut holding rod 1, the spring ring 11 is further deformed and stretched and acts on the pressing block continuously to apply pressure to the direction close to the axis of the nut holding rod 1, namely, the resistance of the resistance piece, and the pressing block plate 10 further continuously applies force to the nut pressing block 3 to enable the nut pressing block 3 to press the nut in the nut groove 2.

The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims

1. A screw holder, characterized in that: including holding nail pole (1), holding nail pole (1) one end and offered and supply nail cap male nail cap groove (2), be provided with on holding nail pole (1) and press cap piece (3), offer on the cell wall of nail cap groove (2) and supply to press cap piece (3) to put into press cap hole (4), press cap piece (3) can enter into inside nail cap groove (2) through pressing cap hole (4), hold to be provided with on nail pole (1) and be used for providing the resistance spare of resistance to pressing cap piece (3) at the in-process to the outside removal of nail cap groove (2).

2. A screw driver according to claim 1, wherein: the resistance piece is a swinging rod (5) arranged on one side of the nail holding rod (1), the cap pressing block (3) is arranged on the swinging rod (5), an elastic connecting part (6) is arranged between the elastic connecting part (6) and the nail holding rod (1), and the swinging rod (5) can swing on one side of the nail holding rod (1) through the elastic connecting part (6) so as to drive the cap pressing block (3) to move into or out of the nail cap groove (2).

3. A screw driver according to claim 2, wherein: deformation abdicating holes (7) are formed between the elastic connecting parts (6) and the nail holding rods (1).

4. A screw driver according to claim 1, wherein: the resistance piece comprises a swinging rod (5) arranged at one side of the nail holding rod (1) and a tension spring (8) arranged on the swinging rod (5), the cap pressing block (3) is arranged on the swinging rod (5), and the tension spring (8) is used for providing tension force for the swinging rod (5) towards the direction of the nail holding rod (1); the nail holding rod (1) is hinged with the swinging rod (5), and the swinging rod (5) can rotate around a hinge shaft between the swinging rod and the nail holding rod (1) so as to drive the cap pressing block (3) to move inwards or outwards of the cap pressing groove (2).

5. A screw driver according to claim 4, wherein: a spring inserting groove (9) into which a tension spring (8) is inserted is formed in one side, close to the swinging rod (5), of the nail holding rod (1), and the tension spring (8) is stretched between the groove bottom of the spring inserting groove (9) and the swinging rod (5).

6. A screw driver according to claim 1, wherein: the resistance component comprises a pressing plate (10) arranged on one side of the pressing cap hole (4) deviating from the nail cap groove (2) and a spring ring (11) sleeved on the nail holding rod (1), the pressing cap block (3) is formed on the pressing plate (10) and the pressing plate (10) cannot pass through the pressing cap hole (4), and the inner ring of the spring ring (11) is abutted against one side of the pressing plate deviating from the pressing cap block (3).

7. A screw driver according to claim 6, wherein: the circumferential surface of the nail holding rod (1) and one side of the pressing block (10) away from the pressing cap block (3) are jointly provided with a spring embedding groove (9) for embedding a spring coil (11).

8. A screw driver according to claim 1, wherein: one side of the cap pressing block (3) close to the notch of the nut groove (2) is provided with a chamfer or a rounding, and the chamfer or the rounding is positioned on one side of the cap pressing block (3) close to the nut groove (2).

9. A screw driver according to claim 1, wherein: the edge of the notch of the nail cap groove (2) is processed with a chamfer or a rounding.