KR20210104312A - Universal screwdriver - Google Patents

Abstract

The present disclosure is to provide a universal screwdriver that can be used interchangeably regardless of the shape of the engagement groove formed in the screw head, and also can tighten or loosen the screw with the engagement groove damaged. According to the present disclosure, the disclosed universal screwdriver comprises: a bit part having a plurality of iron cores, the lower ends of which are compatible with various engagement grooves formed in the screw head, and an elastic support plate for elastically supporting the upper ends of each iron core; and a body part including a rear body accommodating the upper end of the elastic support plate and the iron core therein, and having a front body connected to the rear body and accommodating the iron cores exposed to the outside of the rear body therein, but exposing lower ends of the iron cores to the outside.

Description

Universal Screwdriver {UNIVERSAL SCREWDRIVER}

The present invention (Disclosure) relates to a universal screw driver, and specifically, it can be used interchangeably regardless of the shape of the engagement groove formed in the screw head, and a universal screw that allows the engagement groove to tighten or loosen a damaged screw. It's about screwdrivers.

Herein, background information related to the present invention is provided, which does not necessarily imply prior art (This section provides background information related to the present disclosure which is not necessarily prior art).

In general, a screwdriver is a tool for fastening and disassembling screws, and is one of the most widely used essential items in the construction site, machinery and furniture assembling, as well as at home.

These drivers usually include a flat (-) screwdriver and a Phillips (+) screwdriver depending on the type of screw that can be fastened, and there are a magnetic material driver and a non-magnetic material driver depending on whether the screw contact part of the driver is magnetic.

In addition, in recent years, a screwdriver having a flat screwdriver on one side and a Phillips screwdriver on the other side has been developed and widely used as a combined driver or replaceable driver that can be used by alternately inserting a screwdriver into the handle.

However, since the shape of the engagement groove formed in the head of the screw is variously changed from a straight or cross shape to a hexagon or a rhombus in recent years. Accordingly, there was a problem that the user had to have various drivers and driver bits.

Korean Patent Publication No. 10-1566364 Korean Patent Publication No. 10-0359284 Korean Patent Publication No. 10-1174197

An object of the present invention (Disclosure) is to provide a universal screw driver that can be used interchangeably regardless of the shape of the engagement groove formed on the screw head, and that enables the engagement groove to tighten or loosen a damaged screw.

Herein, a general summary of the present invention is provided, which should not be construed as limiting the scope of the present invention (This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).

In order to solve the above problems, the universal screw driver according to any one aspect of the various aspects describing the present invention includes a plurality of iron cores whose lower ends are compatible with various engagement grooves formed in the screw head, a bit portion having an elastic support plate that elastically supports the upper end of each iron core; and a body part having a rear body accommodating the elastic support plate and the upper end of the iron core therein; may include.

In the universal screw driver according to an aspect of the present invention, on the lower end side of the rear body, a first inclined surface extending from an outer circumferential surface adjacent to the lower end of the rear body to a lower end of the rear body gradually narrowing in width, and a first inclined surface A first connection portion including a plurality of pressing pieces provided divided by a male screw formed on the outer circumferential surface of the rear body and a plurality of slit grooves extending from the lower end of the rear body to the upper end of the rear body is provided, and the front body has the upper end of the front body It is provided in an expanded form on the side, and a second inclined surface extending gradually narrower in width from the upper end to the lower end of the inner peripheral surface, and a second connection part formed on the outer peripheral surface of the second inclined surface and comprising a female screw engaged with the male screw is provided. , The second inclined surface and the first inclined surface may be formed to have the same inclination angle, and the second inclined surface may be formed to be longer than the length of the first inclined surface.

In the universal screw driver according to an aspect of the present invention, the iron cores have a circular cross section and extend vertically, and the iron cores are slidably arranged while filling the inside of the front body along the longitudinal direction of the front body, Once the side is magnetized it can be provided.

In the universal screw driver according to an aspect of the present invention, each of the iron cores and the elastic support plate are connected via a compression coil spring, the lower end of each compression coil spring is connected to the upper end of the corresponding iron core, and each The upper end of the compression coil spring is connected to the lower surface of the elastic support plate, and a handle for pressing the elastic support plate is integrally formed on the upper surface of the elastic support plate to press the iron cores to the screw side when loosening or tightening the screw, and the rear A guide hole for guiding the extension end of the handle may be formed in the body to extend from the upper end side to the lower end side of the rear body.

According to the present invention, since the iron cores can be fitted into the engaging groove regardless of the shape of the engaging groove formed on the screw head, it can be used interchangeably regardless of the shape of the engaging groove, as well as tightening or loosening the damaged screw in the engaging groove. It is possible to provide an effect that makes it possible.

1 is a perspective view showing a universal screw driver according to the present invention.
Figure 2 is a cross-sectional view showing the inside of the universal screw driver shown in Figure 1;
Figures 3a to 3c is a view showing the use state of the universal screw driver according to the present invention.

Hereinafter, an embodiment in which the universal screw driver according to the present invention is implemented will be described in detail with reference to the drawings.

However, the intrinsic technical idea of the present invention cannot be said to be limited by the embodiments described below, and the following by those skilled in the art based on the intrinsic technical idea of the present invention It is revealed that the range that can be easily suggested as a method of substitution or change of the embodiment described in is included.

In addition, since the terms used below are selected for convenience of explanation, in grasping the intrinsic technical idea of the present invention, they are not limited to the dictionary meaning and are appropriately interpreted as meanings consistent with the technical spirit of the present invention. it should be

Of the accompanying drawings, FIGS. 1 and 2 are views showing a universal screw driver according to the present invention, and the universal screw driver 100 according to the present invention includes a screw (S; see FIGS. 3A to 3C) formed in the head of various It includes a bit portion 130 compatible with the interlocking groove (H), and a body portion 110 supporting the bit portion 130 .

First, the main body 110 includes a rear body 112 and a front body 120 , and the rear body 112 and the front body 120 are interconnected to each other and the bit portion 130 . support the

The rear body 112 extends vertically and has an upper end closed, a lower end open, and an empty cylindrical shape. The upper side of the bit part 130 is accommodated inside the rear body 112 formed in this way.

And in the rear body 112, a guide long hole 114 for guiding the handle 138 connected to the elastic support plate 136 of the bit part 130 to be described later is formed to extend from the top side to the bottom side of the rear body 112, , the upper side of the bit portion 130 by the handle 138 spanning the long guide hole 114 is accommodated in the rear body 112 inside.

On the other hand, the rear body 112 is provided with a first connection portion 116 for connection with the front body (120).

The first connecting portion 116 extends so as not to interfere with the guide long hole 114 and gradually narrows in width toward the lower end of the rear body 112 on the outer circumferential surface of the rear body 112 adjacent to the lower end of the rear body 112 . and a first inclined surface 116a to be used, and an external screw 116b formed on an outer peripheral surface of the first inclined surface 116a.

In addition, the first connecting portion 114 further includes a plurality of slit grooves 116c extending from the lower end of the rear body 112 toward the upper end of the rear body 112 , and a plurality of slit grooves 116c formed at the lower end of the rear body 112 . A plurality of pressing pieces 118 are formed on the lower end side of the rear body 112 by the slit groove 116c.

The second connection part 122 of the front body 120 is connected to the first connection part 116 formed in this way, and the second connection part 122 of the front body 120 connected to the first connection part 116 is a pressing piece ( 118) so as to strongly grip the iron cores 132 of the bit portion 130, which will be described later.

The front body 120 is provided in a cylindrical shape extending vertically and having open upper and lower portions. The lower end of the bit part 130 is received through the inside of the front body 120 formed in this way.

In addition, a second connection part 122 for connection with the rear body 120 is provided on the front body 120 .

The second connection part 122 is provided in an expanded form on the top side of the front body 120 as shown, and the second connection part 122 is a second connection part 122 extending from the top of the inner circumferential surface to the bottom side and gradually narrowing in width. The second inclined surface 122a includes a female screw 122b formed on the outer peripheral surface of the second inclined surface 122a.

At this time, the female screw 122b is engaged and fastened to the male screw 116b, and the second inclined surface 122a and the first inclined surface 116a are formed to have the same inclination angle.

And the second inclined surface 122a of the second connection part 122 is formed to be longer than the length of the first inclined surface 116a of the first connection part 116 . This is to enable the second inclined surface 122a to press the iron cores 132 of the bit part 130 to be described later by the second inclined surface 122a when the second connection part 124 is connected to the first connection part 116 .

The bit portion 130 includes a plurality of iron cores 132 having a circular cross section and extending vertically, and an elastic support plate 136 for elastically supporting the iron cores 132 .

The iron cores 132 are slidably disposed while filling the inside of the front body 120 along the longitudinal direction of the front body 120 , and the lower ends of the iron cores 132 are exposed to the outside of the bottom of the front body 120 . It extends and the upper end is disposed on the front body 120 to extend into the rear body 110 past the first connector 116 .

And the upper ends of each of the iron cores 132 extending into the rear body 110 are elastically supported by the elastic support plate 136 via a plurality of compression coil springs 134 .

Here, one end of the iron cores 132 may be magnetized to be attached to the screw (S).

The elastic support plate 136 is provided in the shape of a horizontal disk, and the elastic support plate 136 has a lower surface facing the upper end of the iron core 132 extending into the rear body 110 inside the rear body 110 . It is arranged to be liftable.

As described above, the elastic support plate 136 disposed inside the rear body 110 is connected to each of the iron cores 132 via a plurality of compression coil springs 134 .

In other words, the lower end of each compression coil spring 134 is connected to the upper end of the corresponding iron core 132 , and the upper end of each compression coil spring 134 is the lower surface of the elastic support plate 136 so as not to interfere with each other. is connected to

And on the upper surface of the elastic support plate 136, a handle 138 is integrally formed to transmit force to the screw S when loosening or tightening the screw S, and the extended end of the handle 138 is as shown. Likewise, it is exposed to the outside of the rear body 110 through the guide long hole 114 .

That is, when the user pushes the handle 138 when tightening or loosening the screw S, the elastic support plate 136 presses the iron core 132 toward the screw S, thereby being bitten when tightening or loosening the screw S. The iron cores 132 fitted in the groove (H) are kept engaged in the engagement groove (H).

Hereinafter, the state of use of the universal screw driver 100 formed as described above will be briefly described.

In order to unscrew the screw (S) using the universal screw driver 100 according to the present invention, first, the body portion 110 under the state that one end of the iron cores 132 is in close contact with the head of the screw (S) to be loosened. It descends to the side of the screw (S) (refer to FIG. 3A).

At this time, since only the main body 110 is lowered in the fixed state of the bit 130 , the handle 138 of the bit 130 is moved from the lower end to the upper end of the guide long hole 114 .

Under this condition, the handle 138 is pushed toward the head of the screw S to press the iron core 132 toward the head of the screw S, and at this time, the iron core facing the engagement groove H formed in the head of the screw (S) ( 132 are inserted into the engaging groove (H), and the remaining iron cores 132 are in close contact with the periphery of the engaging groove (H) (see FIG. 3b ).

And as described above, when a part of the iron core 132 is inserted into the engaging groove H, the iron cores 132 bitten by the engaging groove H do not fall out of the engaging groove H, that is, the pressing pieces 118 are inserted into the iron core. In a state in which the second connection part 122 is fastened to the first connection part 116 to press the 132, the user rotates the universal screw (S) driver 100 according to the present invention in the screw (S) loosening direction. At this time, the screw (S) is loosened while rotating along the universal screw driver 100 according to the present invention (see Fig. 3c).

Meanwhile, although loosening the screw has been described above, since the method of tightening the screw S is substantially the same as the method of unscrewing the screw S, a detailed description thereof will be omitted.

In the universal screw driver 100 according to the present invention formed as described above, regardless of the shape of the engaging groove H formed in the screw head, since the iron cores 132 can be fitted into the engaging groove H, Not only can it be used interchangeably regardless of shape, but also the retaining groove (H) makes it possible to tighten or loosen a damaged screw.

In the foregoing, specific embodiments of the present invention have been described and illustrated, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Accordingly, such modifications or variations should not be individually understood from the technical spirit or point of view of the present invention, and modified embodiments should be said to belong to the claims of the present invention.

Claims (4)

a bit portion having a plurality of iron cores, the lower ends of which are compatible with various engaging grooves formed in the screw head, and an elastic support plate for elastically supporting the upper ends of each of the iron cores; and
A rear body for accommodating the elastic support plate and the upper end of the iron core therein, and a front for accommodating the iron core connected to the rear body and exposed to the outside of the rear body therein, with lower ends of the iron cores exposed to the outside A universal screw driver comprising; a body portion having a body.
The method according to claim 1,
On the lower end side of the rear body, a first inclined surface extending from an outer peripheral surface adjacent to the lower end of the rear body to a lower end of the rear body gradually narrowing in width, a male screw formed on the outer peripheral surface of the first inclined surface, and the rear body A first connection part including a plurality of pressing pieces provided by being divided by a plurality of slit grooves extending from the lower end to the upper end side of the rear body is provided,
The front body has a second inclined surface that is provided in an expanded form on the upper end of the front body, the width gradually narrows from the upper end of the inner peripheral surface to the lower end, and is formed on the outer peripheral surface of the second inclined surface and fits the male screw. A second connection part including a mating female screw is provided,
The second inclined surface and the first inclined surface are formed to have the same inclination angle, and the second inclined surface is formed to be longer than a length of the first inclined surface.
The method according to claim 1,
The iron cores have a circular cross section and extend vertically,
The iron cores are slidably disposed while filling the inside of the front body along the longitudinal direction of the front body,
One end of the iron cores are provided by being magnetized universal screw driver.
The method according to claim 1,
Each of the iron cores and the elastic support plate are connected via a compression coil spring,
The lower end of each of the compression coil springs is connected to the upper end of the corresponding iron core, and the upper end of each of the compression coil springs is connected to the lower surface of the elastic support plate,
A handle for pressing the elastic support plate is integrally formed on the upper surface of the elastic support plate to press the iron cores to the screw side when the screw is loosened or tightened, and the rear body has a guide hole for guiding the extended end of the handle. A universal screw driver formed to extend from the upper end side to the lower end side of the rear body.

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