CN213489222U

CN213489222U - Screw and self-holding screw locking screwdriver matched with same

Info

Publication number: CN213489222U
Application number: CN202022511829.1U
Authority: CN
Inventors: 赵天明; 曹洁武
Original assignee: Changzhou Kanghui Medical Innovation Co Ltd
Current assignee: Changzhou Kanghui Medical Innovation Co Ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-06-22
Anticipated expiration: 2030-11-03

Abstract

The utility model relates to a screw reaches and supporting formula screw locking bottle opener of holding certainly thereof, the screw includes the nail body and sets up the screwhead on nail body top, has seted up circular blind hole on the screwhead, is provided with the annular groove on the lateral wall of circular blind hole. The self-holding screw locking screwdriver comprises a main body rod part, one end of the main body rod part is provided with a handle part, the other end of the main body rod part is provided with an operation part, the operation part comprises a screwdriver inner core and a sleeve sleeved outside the screwdriver inner core, the screwdriver inner core comprises at least one core rod deviating from the axis direction of the main body rod part, an arc-shaped bulge is arranged on the outer side face of one end, away from the main body rod part, of the core rod, and an inner interface is arranged at one end. The utility model discloses can make the cooperation of the bottle opener inner core of locking bottle opener and the annular groove on the screw, combine the cooperation of sleeve and screwhead, realize the locking bottle opener to holding of screw and get the function.

Description

Screw and self-holding screw locking screwdriver matched with same

Technical Field

The utility model belongs to the technical field of orthopedics medical instrument, concretely relates to screw reaches and rather than supporting self-sustaining formula screw locking bottle opener.

Background

The internal fixation device is used for fixing fracture parts, and the locking screwdriver is a tool commonly used in orthopedic surgery and has the function of fastening a screw to an implant such as an internal fixation steel plate or directly fixing the screw to a human skeleton. The screw can be firmly held and taken by the locking screwdriver during the operation, so that the screw is prevented from being separated from the screwdriver and falling into the operation incision during the operation, and particularly in the minimally invasive small incision operation, the screw is difficult to take out after falling into the incision, thereby bringing extra risks to the operation.

In order to reduce the operation time, the operation tool is small as possible, is convenient to be used for a small operation incision and cannot block the operation view of a doctor. The traditional locking screwdriver has poor holding and taking effects on the screw, and the structure of the screw and the locking screwdriver matched with the screw is complex, so that great inconvenience is brought to the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a screw reaches and holds formula screw locking bottle opener certainly rather than supporting to solve the locking bottle opener and hold the problem of getting the effect difference to the screw.

The utility model discloses a screw reaches and is realized like this with supporting self-sustaining formula screw locking bottle opener:

a screw comprises a screw body and a screw head arranged at the top end of the screw body, wherein a round blind hole is formed in the screw head, and an annular groove is formed in the side wall of the round blind hole.

Further, the screw head is an outer hexagonal joint, an outer square joint, an outer pentagonal joint or an outer plum blossom joint.

Furthermore, a limiting skirt is arranged between the screw head and the screw body.

Secondly, the utility model also provides a self-sustaining formula screw locking bottle opener, it is supporting with above-mentioned screw, and it includes main part pole portion, the one end of main part pole portion is provided with the stalk portion, and the other end is provided with the operation portion, the operation portion includes the bottle opener inner core, and overlaps and be in the outer sleeve of bottle opener inner core, the bottle opener inner core includes the core bar that at least one skew main part pole portion axle center direction set up, it is protruding that the core bar is provided with the arc on keeping away from the one end lateral surface of main part pole portion, the sleeve is kept away from the one end of main part pole.

Furthermore, the screwdriver inner core comprises at least two core rods, the core rods are distributed in an annular shape, and deformation intervals are reserved between the adjacent core rods.

Further, the inner interface is an inner hexagonal interface, an inner square interface, an inner pentagonal interface or an inner quincuncial interface.

Furthermore, handle grooves with the length direction being the same as the axial direction of the handle are uniformly arranged on the outer annular surface of the handle.

Furthermore, the inner wall of the groove of the handle part is of a concave cambered surface structure, and the axial direction of the structure is parallel to the axial direction of the handle part.

Further, a transition step is arranged between the handle part and the main body rod part.

Furthermore, a limiting ring groove is arranged on the handle part.

After the technical scheme is adopted, the utility model discloses the beneficial effect who has does:

(1) the screw provided by the utility model has simple structure, can be effectively matched with a locking screwdriver matched with the screw, and ensures the safety of the operation;

(2) the utility model provides a locking bottle opener can with rather than supporting screw cooperation, go into the annular groove on the screw through the protruding card of arc to combine the cooperation of sleeve and screwhead, thereby realize the locking bottle opener and get the function to holding of screw, guarantee locking bottle opener and screw complex stability.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a structural view of a screw according to embodiment 1 of the present invention;

fig. 2 is an axial sectional view of a screw according to embodiment 1 of the present invention;

fig. 3 is a structural view of a self-supporting screw driver according to embodiment 1 of the present invention;

fig. 4 is a structural view of a self-supporting screw lock driver (not sleeved) according to embodiment 1 of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

fig. 6 is a structural view of a sleeve of a self-sustaining screw lock driver according to embodiment 1 of the present invention;

fig. 7 is an axial sectional view of a sleeve of a self-sustaining screw lock driver according to embodiment 1 of the present invention;

fig. 8 is an axial sectional view of a screw of embodiment 1 of the present invention engaged with a self-sustaining screw lock driver;

fig. 9 is an enlarged view of portion B of fig. 8;

fig. 10 is a structural view of a screw according to embodiment 2 of the present invention;

fig. 11 is a structural view of a self-supporting screw lock driver (not sleeved) according to embodiment 3 of the present invention;

fig. 12 is an enlarged view of portion C of fig. 11;

fig. 13 is a structural view of a self-supporting screw lock driver (not sleeved) according to embodiment 4 of the present invention;

fig. 14 is an enlarged view of portion D of fig. 13;

in the figure: a nail body 11, a screw head 12, a round blind hole 13, an annular groove 14, a limiting skirt 15,

the screwdriver comprises a main body rod part 21, a handle part 22, an operating part 23, a screwdriver inner core 24, a sleeve 25, a core rod 26, an arc-shaped protrusion 27, an inner interface 28, a handle part groove 29, a transition step 210, a limiting ring groove 211 and a deformation interval 212.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-9, a screw comprises a screw body 11 and a screw head 12 arranged at the top end of the screw body 11, wherein a round blind hole 13 is formed on the screw head 12, and an annular groove 14 is formed on the side wall of the round blind hole 13.

Specifically, the bottom of the round blind hole 13 is of a conical structure.

In the present embodiment, the screw head 12 is an outer hexagonal socket.

When the screw head 12 is engaged with the sleeve 25 of the driver, a stopper skirt 15 is provided between the screw head 12 and the nail body 11 in order to limit the position of the sleeve 25.

The self-holding screw locking screwdriver matched with the screw comprises a main body rod part 21, wherein one end of the main body rod part 21 is provided with a handle part 22, the other end of the main body rod part is provided with an operating part 23, the operating part 23 comprises a screwdriver inner core 24 and a sleeve 25 sleeved outside the screwdriver inner core 24, the screwdriver inner core 24 comprises at least one core rod 26 which is arranged in a way of deviating from the axis direction of the main body rod part 21, an arc-shaped bulge 27 is arranged on the outer side surface of one end of the core rod 26, which is far away from the main body rod part 21, and an inner interface 28 is arranged at one end of.

Specifically, in the present embodiment, the core rod 26 includes one end away from the main body rod 21 and deviating from the axial center direction of the main body rod 21, and the arc-shaped protrusion 27 is disposed at the side of the end facing the deviating direction, and the arc-shaped protrusion 27 is disposed to cooperate with the annular groove 14.

When the locking screwdriver is matched with the screw, the sleeve 25 is sleeved on the outer side of the screw head 12, the core rod 26 extends into the round blind hole 13, and the arc-shaped bulge 27 is clamped in the annular groove 14, so that the holding and taking functions of the locking screwdriver on the screw are realized.

To mate with the structure of the screw head 12 of the present embodiment, the internal interface 28 is a socket head adapter.

Preferably, the sleeve 25 is welded to the exterior of the inner core driver 24.

In order to facilitate the holding of the locking driver, shank grooves 29 having the same length direction as the axial direction of the shank 22 are uniformly formed on the outer circumferential surface of the shank 22.

In order to increase the firmness of clamping the locking screwdriver, the inner wall of the handle groove 29 is a concave cambered surface structure, and the axial direction of the structure is parallel to the axial direction of the handle 22.

In order to ensure the small size of the screwdriver, the diameter of the main body rod 21 is small, and in order to facilitate the use of the screwdriver by a doctor, the diameter of the handle 22 needs to be designed to be slightly larger, so that a transition step 210 is arranged between the handle 22 and the main body rod 21 in order to increase the strength between the handle 22 and the main body rod 21.

In order to facilitate the limit by cooperating with the fixed chuck, the handle 22 is provided with a limit ring groove 211.

Because the end of the core bar 26 deviates from the axial center direction of the main body rod part 21, in the process of matching the locking driver with the screw, firstly, the inner interface 28 of the sleeve 25 is oppositely arranged with the screw head 12, and the screw head 12 is installed in the inner interface 28 in the sleeve 25, the side wall of the round blind hole 13 extrudes the arc-shaped bulge 27 position of the core bar 26 to the axial center direction of the round blind hole 13 to generate elastic deformation initially, so that the core bar 26 extends into the round blind hole 13, after the arc-shaped bulge 27 reaches the position of the annular groove 14, the core bar 26 resets, the arc-shaped bulge 27 is clamped in the annular groove 14, and at the moment, the inner interface 28 of the sleeve 25 is matched with the screw head 12, and the holding function of the locking driver on the screw. And the screwing and unscrewing of the screw are achieved by the cooperation of the internal interface 28 with the screw head 12.

Example 2

As shown in fig. 10, the present embodiment provides a screw having substantially the same structure as that of the screw provided in embodiment 1, except that the screw head 12 is an outside square joint.

Accordingly, the inner interface 28 in the sleeve 25 that mates with this screw head 12 is an inner square interface.

Example 3

As shown in fig. 11 to 12, the present embodiment provides a self-sustained screw lock driver having substantially the same structure as the self-sustained screw lock driver provided in embodiment 1, except that the driver core 24 includes two core rods 26, and the two core rods 26 are annularly arranged and oppositely disposed, and a deformation interval 212 is provided between the two core rods 26.

Specifically, in this embodiment, the two core bars 26 are arranged oppositely, the side surfaces of the two core bars 26 opposite to each other are of an arc surface structure, the arc-shaped protrusion 27 is arranged on the arc surface, and the deformation interval 212 left between the two core bars 26 can be conveniently compressed inwards when being matched with the circular blind hole 13, so that the arc-shaped protrusion 27 is conveniently matched into the annular groove 14.

Example 4

As shown in fig. 13 to 14, the present embodiment provides a self-sustained screw lock driver having substantially the same structure as that of the self-sustained screw lock driver provided in embodiment 1, except that the driver core 24 includes four core rods 26, and the four core rods 26 are annularly distributed, with a deformation interval 212 provided between the two core rods 26.

Specifically, in the present embodiment, the number of the core bars 26 is four, and the four core bars 26 are distributed in a ring shape, and the side surface of the four core bars 26 located on the outer ring surface is an arc surface, so that the arc protrusion 27 is disposed on the arc surface, and similarly, the deformation interval 212 is disposed to facilitate the arc protrusion 27 to be fitted into the annular groove 14.

The utility model provides an among the screw structure, its screwhead 12 can also set to but not only be limited to outer five square joint or outer plum blossom joint except above-mentioned structure.

In contrast, the inner interface 28 in the sleeve 25 of the self-contained screw lock driver matched with the screw can be provided with an inner pentagonal interface or an inner quincunx interface matched with the inner interface.

The number of core rods 26 in the inner core driver 24 is not limited to one, two or four in the above embodiments.

The utility model provides a screw and self-sustaining formula screw locking bottle opener can make the cooperation of annular groove 14 on bottle opener inner core 24 of locking bottle opener and the screw to combine the cooperation of the screwhead 12 of internal junction 28 and screw in the sleeve 25, realize the locking bottle opener to holding of screw and get the function, and to screwing and dismantling of screw, overall structure is simple, and convenient to use has improved the security performance of operation in-process.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The screw is characterized by comprising a screw body (11) and a screw head (12) arranged at the top end of the screw body (11), wherein a round blind hole (13) is formed in the screw head (12), and an annular groove (14) is formed in the side wall of the round blind hole (13).

2. The screw according to claim 1, characterized in that the screw head (12) is an external hexagonal joint, an external square joint, an external pentagonal joint or an external quincunx joint.

3. Screw according to claim 1, characterized in that a limiting skirt (15) is provided between the screw head (12) and the shank (11).

4. A self-contained screw locking driver, characterized in that, the self-contained screw locking driver is matched with the screw of claim 1, which comprises a main body rod part (21), one end of the main body rod part (21) is provided with a handle part (22), the other end is provided with an operation part (23), the operation part (23) comprises a driver inner core (24) and a sleeve (25) sleeved outside the driver inner core (24), the driver inner core (24) comprises at least one core rod (26) which is arranged in a way of deviating from the axial center direction of the main body rod part (21), the outer side surface of one end of the core rod (26) far away from the main body rod part (21) is provided with an arc-shaped bulge (27), and one end of the sleeve (25) far away from the main body rod part (21) is provided with an inner.

5. Self-sustaining screw lock driver according to claim 4, characterized in that the driver core (24) comprises at least two core rods (26), the core rods (26) being distributed annularly with deformation spaces (212) between adjacent core rods (26).

6. Self-sustaining screw lock driver according to claim 4, characterized in that the inner interface (28) is a socket head, a socket head or a socket head.

7. The self-sustaining screw lock driver according to claim 4, wherein the shank portion (22) is uniformly provided on an outer circumferential surface thereof with shank portion grooves (29) having a length direction identical to an axial direction of the shank portion (22).

8. Self-sustaining screw lock driver according to claim 7, characterized in that the inner wall of the shank recess (29) is a concave arc structure and the axial direction of the structure is parallel to the axial direction of the shank (22).

9. Self-sustaining screw lock driver according to claim 4, characterized in that a transition step (210) is provided between the shank (22) and the body shank (21).

10. Self-sustaining screw lock driver according to claim 4, characterized in that a limiting ring groove (211) is provided on the shank (22).