KR20170057999A

KR20170057999A - driver bits

Info

Publication number: KR20170057999A
Application number: KR1020150161612A
Authority: KR
Inventors: 이강우
Original assignee: 이강우
Priority date: 2015-11-18
Filing date: 2015-11-18
Publication date: 2017-05-26

Abstract

The present invention relates to a driver bit of a new structure, capable of clamping or releasing a hexagonal head bolt including a protruding unit of a triangular prism shape and a screw with a groove of a straight shape or a cross shape. According to the present invention, the driver bit comprises: a bit main body having a connection unit (110) of a straight shape or a cross shape at an end and connected to a chuck (5) of a power drill; and a slide container (20) connected to the outside of the bit main body (10) to slide and having a connection groove (21) corresponding to a protruding unit (4) of the hexagonal head bolt (3) at a front end. As the slide container (20) moves forward and backward, the hexagonal head bolt (3) or a cross head screw (1) is clamped or is released. Therefore, when the hexagonal head bolts are alternately clamped or released, there is no need to change the driver bit. So, the driver bit is conveniently used.

Description

Driver bits {driver bits}

The present invention relates to a driver bit of a new structure which is capable of tightening or loosening a hexagonal screw bolt provided with a screw having a straight or cross-shaped groove and a hexagonal columnar protrusion.

2. Description of the Related Art [0002] In general, various types of screwdrivers, which are coupled to a chuck provided in an electric drill and used for tightening or unscrewing a screw, have been developed and widely used depending on the shape of a screw.

On the other hand, among the various kinds of screws, as shown in Figs. 1 and 2, a cross screw 1 in which a cross-shaped groove 2 is formed in a head and a hexagonal screw bolt 3 ) Are the most commonly used.

3, a screw bit 6 used for screwing or unscrewing the Phillips screw 1 has a cross-shaped engaging portion 6a corresponding to the groove 2 at its front and rear ends And a hexagonal coupling groove 6b corresponding to the protruding portion 4 is formed at the front end of the driver bit 6 used when the hex bolt 3 is tightened or loosened.

That is, since the driver bits 6 used for screwing or unscrewing the cross screw 1 or the hex screw screw 3 have different structures and are incompatible with each other, the cross screw 1 and the hex screw screw 3 The driver bit 6 coupled to the chuck 5 must be separated and replaced with another one.

This problem occurs in the same manner when the flat head screw and the hex screw bolt (3) are alternately loosened and tightened.

Therefore, there is a need for a new method to solve such a problem.

Published Japanese Patent Application No. 2001-0025796, Japanese Patent Application Laid-Open No. 10-2015-0080996,

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a driver bit of a new structure which can screw or unscrew a hexagonal screw bolt having a screw having a straight or cross- It has its purpose.

According to an aspect of the present invention for achieving the above object, there is provided a driver bit which is coupled to a chuck (5) of an electric drill so as to be able to unscrew or tighten a screw, The bit body 10 is coupled to the chuck 5 of the electric drill and is slidably coupled to the outside of the bit body 10 and has a hexagonal screw hole 3 Wherein a through hole (22) corresponding to the bit body (10) is formed at the center of the slide cylinder (20) with front and rear ends So that the slide cylinder 20 can be retracted and the engaging portion 11 can be projected so as to tighten or loosen the flat screw or the Phillips Screw 1, The protrusion 4 of the hexagonal screw bit 3 is inserted into the groove 21, Combine is provided with a driver bit, it characterized in that the to be tightened or loosened the hex screw bulteu 3.

According to another aspect of the present invention, the bit body 10 is formed in the shape of a polygonal bar, and the through hole 22 is formed of a polygon corresponding to the bit body 10, Is slidably longitudinally coupled to the bit body (10) so as not to pivot laterally.

According to another aspect of the present invention, a concave groove 12 is formed in the circumferential surface of the bit body 10 and is provided in the slide cylinder 20 so that the slide cylinder 20 is advanced And the fixing means 30 is formed at the periphery of the slide cylinder 20 so as to penetrate the inside and outside sides of the slide cylinder 20, A fixed ball 31 inserted into the insertion hole 24 of the slide body 20 and selectively engaged with the concave groove 12 and slidably coupled to the outer side of the slide body 20 in the longitudinal direction of the slide body 20 An outer tubular body 32 having an inner peripheral surface formed with a cam portion 32a for pressing the outer surface of the fixed ball 31 to press the circumferential surface of the fixed ball 31 to protrude from the inner end of the insertion hole 24, And an elastic part (32) connected to the outer tubular body (32) for elastically pressing the outer tubular body (32) And the cam portion 32a is configured to press the fixing ball 31 to protrude to the inside of the insertion hole 24 when the outer tubular body 32 is advanced to the front end side, (33) presses the outer tubular body (32) so as to advance toward the front end portion.

According to another aspect of the present invention, there is further provided a magnet member (25) provided in the coupling groove (21) of the slide cylinder (20) to provide magnetic force to the slide cylinder (20) And the magnet member 25 is formed in a ring shape with a through hole 25a through which the bit body 10 penetrates and is slidably fitted to the outside of the bit body 10 in the through hole 25a Is provided with a sleeve (25b) to allow the magnetic force of the magnet member (25) to be transmitted to the bit body (10) through the sleeve (25b).

A bit body 10 formed with a coupling portion 11 in the form of a straight line or a cross in the end portion according to the present invention and coupled to the chuck 5 of the electric drill, The front end of the hexagon socket bolt 3 is constituted by a slide cylinder 20 in which an engaging groove 21 corresponding to the protruding portion 4 of the hex bolt 3 is formed. Or the Phillips screw (1) can be tightened or loosened,

Therefore, there is no need to replace the screwdriver bit when the hex screw screw 3 or the cross screw 1 is alternately tightened or loosened, which is advantageous in that it is more convenient to use.

1 is a perspective view showing a general square screw,
2 is a perspective view showing a typical hex screw screw,
3 is a side sectional view showing a conventional driver bit,
4 is a side view showing a driver bit according to the present invention,
Figure 5 is a side cross-sectional view of a driver bit according to the present invention,
6 is an enlarged view showing a main part of a driver bit according to the present invention,
FIG. 7 is a rear cross-sectional view taken along the line AA in FIG. 5,
8 and 9 are reference views for explaining the operation of the driver bit according to the present invention,
10 is a reference diagram showing a modified example of the driver bit according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 4 to 9 illustrate a driver bit according to the present invention, which illustrates that the cross screw 1 and the hex screw bolt 3 can be loosened or tightened.

According to this, it is the same as in the prior art that it is coupled to the chuck 5 of the electric drill so that the screw can be loosened or tightened.

The drill bit according to the present invention includes a bit body 10 coupled to a chuck 5 of the electric drill and having a cross-shaped coupling portion 11 at an end thereof, The slide cylinder 20 is provided at the front end thereof with an engagement groove 21 corresponding to the projection 4 of the hex screw bolt 3. The slide cylinder 20 is provided with the slide cylinder 20, And a fixing means (30) for fixing in an advanced state.

The engaging portion 11 is formed at each of the front and rear ends of the bit body 10, and the engaging portion 11 is formed at the front and rear ends of the bit body 10, A concave groove (12) is formed on the front and rear end circumferential surfaces.

The slide cylinder 20 has a cylindrical shape extending to one side. The slide groove 20 is concentrically formed at the front end of the slide cylinder 20, and the through hole 22 is formed at the center of the slide cylinder 20 so that the bit body 10 is slidably engaged. Are formed so as to pass through the front and rear ends.

7, the through hole 22 is formed in a hexagonal shape corresponding to the bit body 10, and when the bit body 10 is coupled to the through hole 22, (20) is slidably longitudinally coupled to the bit body (10) so as not to pivot laterally.

A small diameter portion 23 having a small outer diameter is formed at the rear end of the slide cylinder 20 and a plurality of insertion holes 24 are formed at the front end portion of the narrow portion 23 so as to pass through the inner and outer sides .

The fixing means 30 includes a fixed ball 31 inserted into the insertion hole 24 of the slide body 20 and selectively engaged with the concave groove 12, The outer surface of the fixing ball 31 is pressed on the inner circumferential surface so that the circumferential surface of the fixing ball 31 protrudes to the inner end of the insertion hole 24 An outer tubular body 32 formed with a cam portion 32a and an elastic member 33 connected to the outer tubular body 32 and elastically pressing the outer tubular body 32. [

At this time, the outer tubular body 32 is slidably coupled to the outer side of the narrowed portion 23 of the slide cylinder 20 in the forward and backward directions, and the cam portion 32a is formed such that when the outer tubular body 32 is advanced toward the front end The outer peripheral portion of the fixed ball 31 is pressed inward so that the inner peripheral portion of the fixed ball 31 protrudes to the inner peripheral surface of the insertion hole 24. [

To this end, an inclined surface 32b inclined rearward inward is formed on the front surface of the cam portion 32a.

The elastic member 33 is coupled to the outer side of the slide cylinder 20 so as to be positioned at the rear end of the outer tubular body 32 and uses a compression coil spring for pressing the outer tubular body 32 forward.

The use of the driver bits thus constructed will be described as follows.

5, in a state in which the slide cylinder 20 is retracted, the insertion hole 24 is formed on the outer side of the concave groove 12, as shown in Fig. 8, When the tube 32 is advanced, the slide cylinder 20 is advanced by the elastic member 33 so that the fixed ball 31 is pushed by the inclined surface 32b of the cam portion 32a into the insertion hole 24 And is inserted into the concave groove 12 so that the slide cylinder 20 is fixed so as not to move forward and backward.

At this time, when the slide cylinder 20 advances, the engaging groove 21 formed on the slide cylinder 20 protrudes forward so that the projecting portion 4 of the hex screw bolt 3 is engaged with the engaging groove 21 So that the hexagonal screw bit 3 can be tightened or loosened.

9, when the operator pushes the outer tubular body 32 backward by hand, the fixing ball 31 is pushed out of the insertion hole 24, and the fixing of the slide cylinder 20 Whereby the slide cylinder 20 is slid rearward as shown in Fig.

The engaging portion 11 formed on the distal end of the bit body 10 is exposed so that the engaging portion 11 is engaged with the groove 2 of the cross screw 1 to fasten the cross screw 1, .

The driver bit thus constructed has a bit body 10 formed at its end with a coupling portion 11 in the form of a straight line or a cross and coupled to a chuck 5 of an electric drill, And a slide cylinder 20 having an engagement groove 21 corresponding to the projection 4 of the hex screw bolt 3 formed at the front end of the slide cylinder 20. The hexagon socket bolt 3) or Phillips screw (1) can be tightened or loosened,

Particularly, since the slide cylinder 20 is provided with the fixing means 30 for fixing the slide cylinder 20 in the advanced state, the hexagon screw bolt 3 is tightened by using the slide cylinder 20 It is possible to fix the slide cylinder 20 so as not to move, so that it is more convenient to use.

In this embodiment, the coupling portion 11 is formed in a cross shape, but the coupling portion 11 may be formed in a straight shape.

Although the concave groove 12 is formed only on the front and rear ends of the bit body 10, the concave groove 12 may be additionally formed in the middle portion of the bit body 10, 20 may be fixed to the intermediate portion of the bit body 10. [

10, a magnet member 25 is provided in the coupling groove 21 of the slide cylinder 20 so that magnetic force is transmitted to the slide cylinder 20 and the bit body 10 , It is also possible that the cross screw 1 or the hex screw bolt 3 is attracted and fixed to the engaging portion 11 or the engaging groove 21 by a magnetic force.

At this time, the magnet member 25 is formed in the shape of a ring with a through hole 25a through which the bit body 10 passes, and the through hole 25a is slidable on the outside of the bit body 10 A sleeve 25b in close contact is provided so that the magnetic force of the magnet member 25 is transmitted to the bit body 10 through the sleeve 25b.

The driver bit thus configured is provided with a sleeve 25b slidably attached to the outside of the bit body 10 in the through hole 25a so that the magnet member 25 is in close contact with the outside of the bit body 10 The magnet member 25 is directly brought into close contact with the bit body 10 so that the magnet member 25 is brought into contact with the bit body 10 when the slide cylinder 20 is slid forward and backward, There is an advantage in that it can be prevented from being damaged.

The triangular protrusions are formed in the coupling grooves 21 of the slide cylinder 20 and the triangular protrusions are formed in the coupling grooves 21 of the slide cylinder 20, It is also possible to use a combination of pieces.

When the cross-shaped engaging portion 11 formed at the distal end of the bit body 10 is damaged, a separate commercially available driver bit may be used in combination with the engaging groove 21 of the slide cylinder 20, It is also possible to use a combination of various tools such as a hexagon box or the like in the coupling groove 21.

10. Bit body 20. Slide cylinder
30. Fixing means

Claims

A driver bit coupled to a chuck (5) of an electric drill for unscrewing and screwing,
A bit body 10 which is formed in a rod shape extending in the forward and backward direction and which has a coupling portion 11 in the form of a straight line or a cross at the end thereof and is coupled to the chuck 5 of the electric drill,
And a slide cylinder 20 slidably coupled to the outside of the bit body 10 and having a coupling groove 21 corresponding to the protrusion 4 of the hex screw hole 3 formed at the front end thereof,
A through hole (22) corresponding to the bit body (10) is formed at the center of the slide cylinder (20) so as to pass through the front and rear ends,
The slide cylinder 20 can be retracted so that the engaging portion 11 is projected so that the flat screw or the Phillips screw 1 can be tightened or loosened,
Wherein the slide cylinder (20) is advanced to engage the protruding portion (4) of the hexagonal screw bit (3) in the engaging groove (21) to tighten or loosen the hexagonal screw bit (3).

The method according to claim 1,
The bit body 10 is formed in the shape of a polygonal rod,
The through hole (22) is formed of a polygon corresponding to the bit body (10)
Wherein the slide cylinder (20) is coupled to the bit body (10) such that the slide cylinder (20) is longitudinally slidable and not laterally rotatable.

3. The method of claim 2,
On the peripheral surface of the bit body 10, concave grooves 12 are formed concavely,
Further comprising fixing means (30) provided on the slide cylinder (20) for fixing the slide cylinder (20) in an advanced state,
An insertion hole (24) is formed in a peripheral portion of the slide cylinder (20)
The fixing means (30)
, A fixed ball (31) inserted into the insertion hole (24) of the slide body (20) and selectively coupled to the concave groove (12)
The outer surface of the fixed ball 31 is pressed against the outer surface of the slide body 20 so as to be slidable in the longitudinal direction of the slide body 20 and the peripheral surface of the fixed ball 31 is inserted into the insertion hole An outer tubular body 32 formed with a cam portion 32a for pressing the tubular member 32 so as to protrude from the inner end of the tubular member 24,
And an elastic member (33) connected to the outer tubular body (32) and elastically pressing the outer tubular body (32)
The cam portion 32a is configured to press the fixing ball 31 to protrude inward of the insertion hole 24 when the outer tubular body 32 is advanced to the front end side,
And the elastic member (33) presses the outer tubular body (32) to advance to the front end side.

The method according to claim 1,
Further comprising a magnet member (25) provided inside the coupling groove (21) of the slide cylinder (20) to provide magnetic force to the slide cylinder (20) and the bit body (10)
The magnet member 25 is formed in the shape of a ring with a through hole 25a through which the bit body 10 passes. The through hole 25a is formed with a sleeve (not shown) (25b)
And the magnetic force of the magnet member (25) is transmitted to the bit body (10) through the sleeve (25b).