CN219397538U

CN219397538U - Screw driver

Info

Publication number: CN219397538U
Application number: CN202223271715.XU
Authority: CN
Inventors: 连建伟; 陈锦明; 林润
Original assignee: Shunde Hospital Affiliated To Jinan University Foshan Shunde Second People's Hospital Foshan Shunde Fengyaojing Memorial Hospital
Current assignee: Shunde Hospital Affiliated To Jinan University Foshan Shunde Second People's Hospital Foshan Shunde Fengyaojing Memorial Hospital
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-07-25
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a screwdriver, which comprises: the cutter bar extends along the up-down direction, a hollow channel is arranged in the cutter bar, the hollow channel extends upwards and penetrates through the top side of the cutter bar, and at least two holes communicated with the hollow channel are formed in the outer side of the bottom of the cutter bar; the adjusting assembly comprises an adjusting shaft, a transmission part and cutter heads, wherein the cutter heads are arranged in at least two mutually opposite holes, the adjusting shaft stretches into the hollow channel, the transmission part is respectively connected between all the cutter heads and the cutter bars, and the adjusting shaft can reciprocate in the hollow channel along the length direction and drives the cutter heads to stretch out or retract into the holes through the transmission part; the tool handle is connected to the top end of the tool bar, the position, which is opposite to the hollow channel, of the tool bar is provided with the avoidance channel, and the top end of the adjusting shaft extends upwards out of the avoidance channel.

Description

Screw driver

Technical Field

The utility model relates to a manual tool, in particular to a screwdriver.

Background

In medical operations such as orthopaedics open surgery, the phenomenon of screw head sliding is frequently encountered, when the screw head slides, medical staff needs to directly press down the screw driver on the screw head and then rotate the screw, or clamp the screw head by using a nipper pliers and then slowly rotate, but the screw is disassembled by using the operation method, so that unnecessary pain of patients can be increased, and even secondary damage is caused.

Disclosure of Invention

The present utility model is directed to a screwdriver that solves one or more of the problems of the prior art, providing at least one of a beneficial choice or creation.

The utility model solves the technical problems as follows:

a screwdriver, comprising: the cutter bar extends along the up-down direction, a hollow channel is arranged in the cutter bar, the hollow channel extends upwards and penetrates through the top side of the cutter bar, and at least two holes communicated with the hollow channel are formed in the outer side of the bottom of the cutter bar; the adjusting assembly comprises an adjusting shaft, a transmission part and cutter heads, wherein the cutter heads are arranged in at least two opposite holes, the adjusting shaft stretches into the hollow channel, the transmission part is respectively connected between all the cutter heads and the cutter bars, and the adjusting shaft can reciprocate in the hollow channel along the length direction of the adjusting shaft and drives the cutter heads to stretch out of or retract back into the holes through the transmission part; the cutter handle is connected to the top end of the cutter rod, an avoidance channel is arranged on the cutter rod, opposite to the hollow channel, and the top end of the adjusting shaft extends upwards out of the avoidance channel.

The technical scheme has at least the following beneficial effects: when the screw of smooth silk needs to be demolishd, insert the bottom of cutter arbor to the screw head earlier to grip or press from both sides tight cutter arbor with the instrument, again with the regulating spindle activity in the cavity passageway, drive the tool bit through the driving medium and stretch out the entrance to a cave, at least two tool bits that are just right each other are impressed respectively in the screw head, make the cutter arbor be fixed in the screw head relatively, after using, again with the regulating spindle in the opposite direction activity in the cavity passageway, drive the tool bit through the driving medium and withdraw to the entrance to a cave, can remove the compressive force of tool bit to the screw head this moment, make the cutter arbor can withdraw from the screw head, so can unscrew the screw of demolishment smooth silk, the operation is more efficient, convenience, the security when improving medical operation.

As a further improvement of the technical scheme, the transmission piece comprises a connecting rod, the top end of the connecting rod is rotationally connected with the bottom end of the adjusting shaft, the bottom end of the connecting rod is rotationally connected with the cutter head, the rotation axes at the two ends of the connecting rod extend along the horizontal direction and are parallel to each other, the cutter head is slidingly connected in the hole, and the sliding direction of the cutter head extends along the radial direction of the adjusting shaft. The adjusting shaft is pressed downwards in the hollow channel, the tool bit is pushed away from the hollow channel through the connecting rod, the tool bit stretches out of the hole and is embedded into the screw head, and when the adjusting shaft moves upwards in the hollow channel, the tool bit is pulled to be close to the hollow channel through the connecting rod, so that the tool bit is far away from the screw head and is retracted into the hole.

As a further improvement of the above technical solution, the adjusting shaft is screwed into the hollow channel. The adjusting shaft is rotated, so that the adjusting shaft moves upwards or downwards in the hollow channel, the cutter head is driven to slide through the connecting rod, and the position of the adjusting shaft is self-locked by utilizing threaded fit.

As a further improvement of the technical scheme, the top end face of the adjusting shaft is provided with a regular polygon inner angle hole. The tool of peripheral hardware can be connected to the regulating spindle through the cooperation with regular polygon interior angle hole to the convenient instrument rotation regulating spindle who utilizes the peripheral hardware.

As a further improvement of the above technical solution, the top end of the adjusting shaft is provided with at least two rotating rods along the circumferential direction. When the adjusting shaft is rotated, the adjusting shaft can be applied to the two rotating rods, and the two rotating rods can increase the force applying arm for rotating the adjusting shaft, so that the adjusting shaft is driven to rotate more easily.

As a further improvement of the technical scheme, the positions of the outer sides of the tool handles, corresponding to the rotating rods, are respectively provided with a storage groove, all the storage grooves extend upwards to the top sides of the tool handles, the rotating rods are rotationally connected to the top ends of the adjusting shafts, and the rotating rods can rotate and enter the storage grooves one by one. After the adjusting shaft is rotated to enable the tool bit to extend out of the hole, the rotating rod is rotated and is retracted into the accommodating groove opposite to the rotating rod, the tool handle can be directly held at the moment to enable the screw to be unscrewed by the rotating screw driver, further rotation stopping limitation can be achieved on the adjusting shaft by means of mutual matching of the rotation and the accommodating groove, and the position state that the tool bit extends out of the hole is better maintained.

As a further improvement of the technical scheme, the cutter bar comprises a cylinder body and a bottom cover, wherein the cylinder body is internally provided with a hollow channel extending along the up-down direction, the bottom cover is detachably connected to the bottom end of the cylinder body, and a plurality of holes are formed in the bottom end of the cylinder body along the circumferential direction around the center of the bottom end of the cylinder body. The bottom cover can be detached from the bottom end of the cylinder body to expose the bottom end of the hollow channel, so that the adjusting component can be conveniently arranged in the hollow channel, and the subsequent disassembly, assembly and maintenance are more convenient.

As a further improvement of the technical scheme, four holes are formed in the outer side of the bottom of the cutter bar along the circumferential direction, and four cutter heads are respectively arranged in the four holes. When the adjusting shaft moves up and down along the hollow channel, the four driving parts can drive the four tool bits to extend out or retract back to the hole, so that the four tool bits can form four-direction pressing force on the screw head, and the relative fixed tightness of the tool bar and the screw head is further improved.

As a further improvement of the above technical solution, a side of the cutter head facing away from the hollow passage is provided with a cutter edge, and a middle part of the cutter edge is arched in a direction away from the hollow passage. When the tool bit is pressed into the screw head, the arched part of the middle part of the tool bit is contacted with the screw head, and along with the gradual increase of the pressure of the tool bit, the whole cutting edge is pressed into the screw head gradually, so that the tool bit is pressed into the screw head more easily.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the utility model, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a schematic view of the overall internal structure of the tool bit of the present utility model retracted into the opening;

FIG. 2 is a schematic view of the overall internal structure of the tool bit of the utility model when extended out of the hole.

In the accompanying drawings: 1-cutter bar, 21-adjusting shaft, 211-regular polygon inner angle hole, 212-rotating rod, 22-driving piece, 23-cutter head, 231-cutting edge, 3-cutter handle and 31-containing groove.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to a connection structure that may be better formed by adding or subtracting connection aids depending on the particular implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

Referring to fig. 1 and 2, a screwdriver includes: the cutter bar 1 extends along the up-down direction, a hollow channel is arranged in the cutter bar 1, the hollow channel extends upwards and penetrates through the top side of the cutter bar 1, and at least two holes communicated with the hollow channel are formed in the outer side of the bottom of the cutter bar 1; the adjusting assembly comprises an adjusting shaft 21, a transmission piece 22 and cutter heads 23, wherein the cutter heads 23 are arranged in at least two opposite holes, the adjusting shaft 21 stretches into the hollow channel, the transmission piece 22 is respectively connected between all the cutter heads 23 and the cutter bar 1, and the adjusting shaft 21 can reciprocate in the hollow channel along the length direction and drives the cutter heads 23 to stretch out of or retract back into the holes through the transmission piece 22; the knife handle 3 is connected to the top end of the knife bar 1, an avoidance channel is arranged on the knife bar 1 opposite to the hollow channel, and the top end of the adjusting shaft 21 extends upwards out of the avoidance channel.

When the screw of smooth silk needs to be demolishd, insert the bottom of cutter arbor 1 to the screw head first, and grip or press from both sides tight cutter arbor 1 with the instrument, again with the regulating spindle 21 activity in hollow passageway, drive tool bit 23 through driving piece 22 and stretch out the entrance to a cave, at least two tool bit 23 that are just opposite each other are pressed in the screw head respectively, make cutter arbor 1 be fixed in the screw head relatively, after using, again with the regulating spindle 21 in the opposite direction activity in hollow passageway, drive tool bit 23 through driving piece 22 and withdraw to the entrance to a cave, can remove the clamp force of tool bit 23 to the screw head this moment, make cutter arbor 1 can withdraw from the screw head, so can unscrew the screw of demolishment smooth silk, the operation is more efficient, convenience, the security when improving medical operation.

The transmission member 22 is mainly used for converting the force of the adjusting shaft 21 moving along the linear direction into the power for driving the tool bit 23 to enter and exit the hole, and has various structural forms, such as the inclined plane of the wedge block is used for changing the force application direction of the adjusting shaft 21 and driving the tool bit 23 to move, so that the internal structure is simpler and the force applied to the adjusting shaft 21 is ensured to be stably transferred, in this embodiment, the transmission member 22 comprises a connecting rod, the top end of the connecting rod is rotationally connected to the bottom end of the adjusting shaft 21, the bottom end of the connecting rod is rotationally connected to the tool bit 23, the rotation axes at the two ends of the connecting rod extend along the horizontal direction and are parallel to each other, the tool bit 23 is slidingly connected to the hole, for example, sliding grooves are respectively arranged at the upper side and the lower side of the tool bit 23, and the sliding rails at the upper side and the lower side of the tool bit 23 are correspondingly connected to the sliding grooves at the upper side and the lower side of the hole, so that the tool bit 23 is stably slidingly connected to the hole, and the sliding direction of the tool bit 23 extends along the radial direction of the adjusting shaft 21. The adjusting shaft 21 is pressed downwards in the hollow channel, the tool bit 23 is pushed away from the hollow channel through the connecting rod, the tool bit 23 stretches out of the hole and is embedded into the head of the screw, and when the adjusting shaft 21 moves upwards in the hollow channel, the tool bit 23 is pulled to be close to the hollow channel through the connecting rod, so that the tool bit 23 is far away from the head of the screw and is retracted into the hole.

After the adjusting shaft 21 moves in the hollow passage, if the position of the cutter head 23 needs to be maintained, the position of the adjusting shaft 21 in the hollow passage needs to be maintained, and in this embodiment, the adjusting shaft 21 is connected in the hollow passage by threads. The adjusting shaft 21 is rotated, so that the adjusting shaft 21 can move upwards or downwards in the hollow channel, the cutter head 23 is driven to slide by the connecting rod, and the position of the adjusting shaft 21 is self-locked by utilizing threaded fit.

In order to facilitate rotation of the adjustment shaft 21, in the first embodiment, a top end surface of the adjustment shaft 21 is provided with a regular polygon-shaped inside corner hole 211. The external tool may be coupled to the adjustment shaft 21 through engagement with the regular polygon shaped inside corner hole 211, thereby facilitating rotation of the adjustment shaft 21 using the external tool.

In practical applications, the regular polygon inner corner hole 211 may be regular triangle, square, regular hexagon, etc.

In the second embodiment, at least two rotating rods 212 are circumferentially disposed at the top end of the adjusting shaft 21. When the adjusting shaft 21 is rotated, the force can be applied to the two rotating rods 212, and the two rotations can increase the force applying arm for rotating the adjusting shaft 21, so that the adjusting shaft 21 is driven to rotate more easily.

Further, the outer side of the tool shank 3 is provided with a receiving groove 31 corresponding to a plurality of rotating rods 212, all the receiving grooves 31 extend upwards to the top side of the tool shank 3, the rotating rods 212 are rotatably connected to the top end of the adjusting shaft 21, and the rotating rods 212 are rotatable and enter the receiving grooves 31 one by one. After the adjusting shaft 21 is rotated to enable the tool bit 23 to extend out of the hole, the rotating rod 212 is rotated and is retracted into the accommodating groove 31 opposite to the rotating rod, at the moment, the tool holder 3 can be directly held to enable the screw driver to be turned to unscrew screws, further rotation stopping limitation can be achieved on the adjusting shaft 21 by means of mutual matching of rotation and the accommodating groove 31, and the position state that the tool bit 23 extends out of the hole is better maintained.

In order to facilitate the installation of the adjusting assembly in the cutter bar 1, in this embodiment, the cutter bar 1 includes a cylinder body and a bottom cover, the cylinder body is internally provided with a hollow channel extending along the up-down direction, the bottom cover is detachably connected to the bottom end of the cylinder body, and the bottom end of the cylinder body is provided with a plurality of holes around the center thereof along the circumferential direction. The bottom cover can be detached from the bottom end of the cylinder body to expose the bottom end of the hollow channel, so that the adjusting component can be conveniently arranged in the hollow channel, and the subsequent disassembly, assembly and maintenance are more convenient.

In implementation and application, bottom both accessible buckle lug connection to the bottom of barrel, because bottom department supports on the screw head during the use, the bottom also is difficult to break away from, and in order to further improve the connection stability between bottom and the barrel, accessible screw locks the bottom in the barrel bottom, so both connect more firmly.

In the above embodiment, the tool bar 1 has at least two holes facing each other, but in order to further increase the pressing force of the tool bit 23 on the screw head, three holes may be provided, and in this embodiment, four holes are circumferentially provided on the outer side of the bottom of the tool bar 1, and four tool bits 23 are respectively provided in the four holes. When the adjusting shaft 21 moves up and down along the hollow channel, the four driving parts 22 can drive the four tool bits 23 to extend out or retract back to the hole, so that the four tool bits 23 are utilized to form four-direction pressing force on the screw head, and the relative fixed tightness of the tool bar 1 and the screw head is further improved.

The tool bit 23 is pressed into the screw head, that is, the side of the tool bit 23 facing away from the hollow passage is pressed into the screw head by the pushing force of the driving member 22, so that a concave-convex matching structure is formed between the tool bit 23 and the screw head, and in order to make the tool bit 23 easier to press into the screw head, in this embodiment, the side of the tool bit 23 facing away from the hollow passage is provided with a cutting edge 231, and the middle part of the cutting edge 231 is arched in a direction away from the hollow passage. When the tool bit 23 is pressed into the screw head, the arched portion of the middle part of the tool bit 23 is contacted with the screw head, and along with the gradual increase of the pressure of the tool bit 23, the whole blade 231 is gradually pressed into the screw head, so that the tool bit 23 is easier to be pressed into the screw head.

While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims

1. A screwdriver, characterized in that: comprising the following steps:

the cutter bar (1) extends along the up-down direction, a hollow channel is arranged in the cutter bar (1), the hollow channel extends upwards and penetrates through the top side of the cutter bar (1), and at least two holes communicated with the hollow channel are formed in the outer side of the bottom of the cutter bar (1);

the adjusting assembly comprises an adjusting shaft (21), a transmission part (22) and cutter heads (23), wherein the cutter heads (23) are arranged in at least two mutually opposite holes, the adjusting shaft (21) stretches into the hollow channel, the transmission part (22) is respectively connected between all the cutter heads (23) and the cutter bar (1), and the adjusting shaft (21) can reciprocate in the hollow channel along the length direction and drives the cutter heads (23) to stretch out or retract into the holes through the transmission part (22);

the knife handle (3) is connected to the top end of the knife bar (1), an avoidance channel is arranged on the knife bar (1) opposite to the hollow channel, and the top end of the adjusting shaft (21) extends upwards out of the avoidance channel.

2. A screwdriver according to claim 1, wherein: the transmission piece (22) comprises a connecting rod, the top end of the connecting rod is rotationally connected to the bottom end of the adjusting shaft (21), the bottom end of the connecting rod is rotationally connected to the cutter head (23), rotation axes at two ends of the connecting rod extend along the horizontal direction and are parallel to each other, the cutter head (23) is slidingly connected in the hole, and the sliding direction of the cutter head (23) extends along the radial direction of the adjusting shaft (21).

3. A screwdriver according to claim 2, wherein: the adjusting shaft (21) is connected in the hollow channel through threads.

4. A screwdriver according to claim 3, wherein: the top end surface of the adjusting shaft (21) is provided with a regular polygon inner angle hole (211).

5. A screwdriver according to claim 3, wherein: at least two rotating rods (212) are arranged at the top end of the adjusting shaft (21) along the circumferential direction.

6. A screwdriver according to claim 5, wherein: the outside of handle of a knife (3) corresponds a plurality of the position of bull stick (212) is provided with respectively and accomodates groove (31), all accomodate groove (31) all upwards extend to the top side of handle of a knife (3), a plurality of bull stick (212) rotate connect in the top of regulating axle (21), a plurality of bull stick (212) rotatable and one-to-one get into a plurality of accomodate in groove (31).

7. A screwdriver according to claim 1, wherein: the cutter arbor (1) includes barrel and bottom, form in the barrel along upper and lower direction extension the cavity passageway, bottom detachably connect in the bottom of barrel, the bottom of barrel encircles its center along circumference be provided with a plurality of the entrance to a cave.

8. A screwdriver according to claim 1, wherein: four holes are formed in the outer side of the bottom of the cutter bar (1) along the circumferential direction, and four cutter heads (23) are respectively arranged in the four holes.

9. A screwdriver according to claim 1, wherein: the side of the cutter head (23) facing away from the hollow passage is provided with a cutting edge (231), and the middle part of the cutting edge (231) is arched in a direction away from the hollow passage.