KR20170034777A - Driver for preventing drop of a screw - Google Patents

Abstract

The present invention relates to a driver, and more specifically, to a driver to prevent drop of a screw, being mounted in a normal driver, so as to catch a screw when the screw is released or fastened, and thereby enable a user to conveniently perform work with one hand even in a deep groove or gap. According to one embodiment of the present invention, the driver comprises: a grip, a bit combined with a lower part of the grip, and having a flat-head or Phillips-head tip in an end part; and a grip means installed in the bit to catch a screw head when the tip is combined with the screw head. The grip means comprises: a spring supported in a lower part of the grip to surround the bit; a body having a tubular shape with opened upper and lower surfaces, into which the bit is vertically penetrated, making the top part in comparison with the bottom unit of the spring vertically move within a predetermined range in response to expansion or contraction of the spring, and rotating with the bit; and a pair of tong members extended downwards from the body, and installed in left and right sides by interposing the bit therebetween to be opened or closed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a screw-

The present invention relates to a screwdriver, and more particularly, to a screwdriver preventing driver that can be easily handled with one hand even in a deep groove or a gap by holding the screw when the screw is loosened or screwed to a conventional screwdriver .

The manual or motorized driver has a structure in which the bit is coupled to the lower part of the handle. The bit may be fixed to the handle or removably coupled for exchange. At the end of the bit, there are provided dowel-like or dowel-like tips for applying a screw tightening force.

Such a conventional screwdriver can not hold the screw by hand when the screwdriver is inserted into a narrow gap or deep groove to assemble or unscrew the screw, so that the screw continues to move away from the screwdriver continuously during the operation, And there is a problem that the risk of losing screws is large.

As a result, the screw portion is magnetized by the tip portion so that the screw is caught by the magnetic force. However, even if the screw is attached to a certain extent by the magnetic force,

In addition, in the case of ordinary steel bolts, rust is easily generated and electric conductivity is lowered, so that many screws are replaced with stainless steel screws which do not stick to magnets. However, they are not available for stainless steel screws which are not attached to magnets.

In order to solve such a problem, structures for preventing deviation of screws installed in driver bits have been developed and used. Korean Utility Model Registration Utility Model No. 20-0167515 discloses a driver's departure prevention apparatus.

The screwdriver is provided with a cylinder in which a screw head is inserted into a tip end portion of the screwdriver.

However, since the size of the cylinder is fixed, the screwdriver can use only a screw that matches the size of the cylinder. Further, there is a problem that it is difficult to install a cylinder in an existing driver.

1. Korean Patent Publication No. 1998-016564 2. Korean Utility Model Registration No. 20-0167515

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a screwdriver preventing driver that can easily perform work with one hand even in deep grooves or crevices by holding screws when loosening or tightening screws The purpose is to provide.

It is another object of the present invention to provide a screwdriver preventing driver which can be applied to various screws irrespective of the size of the screw so that the screw can be caught by the forceps structure and is easy to install.

According to an aspect of the present invention, there is provided a screwdriver preventing driver comprising: a handle; A bit coupled to a lower portion of the handle and having a straight or cross-shaped tip at an end; And a gripping means provided on the bit for gripping the screw head when the tip is engaged with the screw head, wherein the gripping means comprises: a spring supported on the lower portion of the handle to surround the bit; A body which is vertically movable in a vertical direction within a predetermined range corresponding to the expansion or contraction of the spring, the upper end of the body being in contact with the lower end of the spring and rotating together with the bit, And a pair of left and right clamping members extending from the body downward so as to be opened or closed so that the edges of the threaded head can be inserted into the lower inner side surface of the clamping member A gripping groove is formed, and the gripping means inserts the tip into the groove of the screw head, The clamping member is opened and closed by the screw head, and the edge of the screw head is inserted into the clamping groove so that the clamping member grips the screw head.

The gripping means further includes an engaging means for restricting the downward movement of the body by allowing the lower end of the body to be hooked when the body falls to the maximum.

The engaging means is configured to transmit the rotational force of the bit to the clamping member so that the clamping member and the body rotate together with the bit upon rotation of the bit.

The engaging means may include a casing embedded in the bit, an elastic body provided in the casing, and an elastic member provided on the casing to be elastically supported by the elastic body and projecting outwardly of the bit so as to engage with the lower end of the body And a latching jaw positioned between the pair of clamping members.

According to another aspect of the present invention, there is provided a screwdriver preventing driver comprising: a handle; A bit coupled to a lower portion of the handle and having a straight or cross-shaped tip at an end; And a gripping means provided on the bit for gripping the screw head when the tip is engaged with the screw head, the gripping means being formed so as to surround the bit by penetrating the bit up and down, A fixing unit for fixing the head part to a specific position of the bit; a spring provided inside the head part; and a lower part coupled to a lower part of the head part, A body that vertically penetrates the body and can move in a vertical direction within a predetermined range in accordance with the expansion or contraction of the spring; a pair of left and right pairs of arms extending downward from the body, And an inserting member provided on the lower inner surface of the clamping member, The clamp groove is formed to Lee can be inserted.

The head unit includes a lower housing having an upper portion of the body inserted therein and having the spring incorporated therein, and an upper housing formed at an upper portion of the lower housing and having the fixing unit incorporated therein.

The fixing unit fixes the upper housing at a position corresponding to one of the at least two fixing grooves formed at regular intervals in the bit.

The fixing unit includes an elastic body provided inside the upper housing and a latching jaw which is elastically supported in the direction of the outer circumference of the bit by the elastic body and is coupled to the fixing groove.

As described above, the screw driver according to the present invention is not a method of attaching the screw to the driver by using a magnet, but adopts a method in which the screw member is firmly held by the screw member so that the screw is attached to the screw driver, It prevents the loss of the screw by moving the screw in the clearance and prevents the loss of the screw. It keeps the screw well attached and it is possible to work smoothly. It can also be used for the screw made of material not attached to the magnet. There are advantages.

In addition, the present invention can be applied to a variety of screws regardless of the size of the screw, because the pair of clamp members catch the screw while being opened.

Further, in the present invention, only the gripping means can be easily installed and used by using an existing driver.

1 is a perspective view of a driver according to a first embodiment of the present invention,
Fig. 2 is a front view of Fig. 1,
Fig. 3 is a bottom view of Fig. 1,
Fig. 4 is a cross-sectional view excerpted from the main part of Fig. 1,
5 to 7 are front views showing the use state of Fig. 1,
8 is a perspective view of a driver according to a second embodiment of the present invention,
FIG. 9 is a partial cutaway view of FIG. 8,
10 is a partial cutaway sectional view showing the use state of Fig.

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

Referring to FIGS. 1 to 4, a screw-down preventing driver according to an embodiment of the present invention includes a handle 10, a bit 20, and a gripping means.

Of course, the handle 10 can be formed in various shapes and sizes as a part that the user grasps by hand. The handle 10 can be formed in the form of a material and a material that increases frictional force with the hand.

The bit 20 is inserted and joined to the joint 15 formed at the bottom of the handle 10. Therefore, the bit 20 can be engaged with and separated from the handle 10, and can be used as needed.

The bit 20 extends long from the bottom of the handle 10 downward. The bit 20 may have a circular or polygonal cross section.

A tip (25) of a straight or cross shape is provided at the lower end of the bit (20). The tip 25 is engaged with a straight groove or a cross groove formed in the screw head.

The gripping means is mounted on the bit 20 to hold the screw head in engagement with the screw head. By means of the gripping means, the present invention can easily tighten and unscrew a screw with one hand even in a deep groove or gap by holding the screw when loosening or tightening the screw.

In addition, since the present invention can be configured by adding components to a conventional driver, there is an advantage that a conventional driver can be used.

The grasping means shown includes a spring 30 which is supported at the bottom of the handle 10 to surround the bit 20 and a bit 30 which penetrates the bit up and down in a tubular form with the upper and lower surfaces open, A body 40 which can move up and down within a predetermined range corresponding to the body 20 and a pair of left and right pairs of the body 20 and the body 20 so as to extend downward from the body 40, And a clamping member (50).

The spring 30 may be a coil spring which surrounds the upper side periphery of the bit 20. The upper end of the spring (30) is supported by a joint (15) formed at the lower part of the handle (10). The upper end of the spring 30 can be fixed to the joint 15 by using the fixing pin 17 provided on the joint 15. The lower end of the spring 30 abuts the upper end of the body 40.

The body (40) has a circular tubular structure with a hollow interior. The bit 20 penetrates in the vertical direction of the body 40. The body 40 can move within a certain range in the vertical direction corresponding to the contraction and expansion of the spring 30.

A pair of left and right clamping members 50 are formed at the bottom of the body 40. As shown in FIG. 3, each of the clamp members 50 is bent in an arc shape, and the left clamp member 50 and the right clamp member 50 are spaced apart from each other. And the bit 20 is located between the pair of right and left clamping members 50. [ A pair of clamping members (50) are installed so as to surround the bit (20) while being positioned with a gap therebetween.

The clamping member 50 is elongated in the vertical direction so that the lower end thereof is substantially coincident with or slightly lowered from the lower end of the bit 20 and the clamping member 50 is made of a metal so as to have elasticity I have. Therefore, when the external force is applied in the direction away from each other, the lower parts of the clamping members 50 are opened. When the external force is removed, the clamping members 50 can be returned to the original position by the elastic force.

On the inner side surface of the lower end of the clamping member (50), a clamping groove (51) is formed so as to catch the head of the screw. When the clamp members 50 on both the left and right sides hold the screw head, the edge of the screw head enters the clamp groove 51 and is caught so as not to fall out.

The gripping means further includes an engaging means 60 for restricting the downward movement of the body 40 by allowing the lower end of the body 40 to be hooked when the body 40 is at its maximum.

This engaging means 60 transmits the rotational force of the bit 20 to the clamping member 50 and serves to rotate the clamping member 50 and the body 40 together with the bit 20 during rotation of the bit 20 .

The engaging means 60 protrudes outwardly of the bit 20 so that the lower end of the body 40 is caught when the body 40 reaches the lowermost end of the range in which the body 40 is movable so that the body 40 does not come off the bit 20.

The illustrated engaging means 60 includes a casing 63 embedded in the bit 20, an elastic body 65 provided in the casing 63, (61) which is provided on the base (63).

A mounting groove is formed on one side of the bit 20, and then a casing 63 is embedded in the mounting groove. If the casing 63 has a hollow cylindrical structure, the one side facing the outward direction of the bit is formed as an open shape. The diameter of the opening is formed to be slightly smaller than the inner diameter of the casing (63).

The elastic body 62, which is a coil spring, and the engagement protuberance 61 are provided inside the casing 63. The stopping jaw 61 is elastically supported by the elastic body 65. The stopping jaw 61 is formed in a ball shape. A part of the latching jaw 61 protrudes outward through the opening of the casing 63. [

The opening of the casing 63 may be formed to be slightly smaller than the diameter of the latching protrusion 61. The latching protrusion 61 may be formed to have a diameter smaller than that of the latching protrusion 61. [

The latching jaws 61 project outwardly of the bit 20 to engage with the lower end of the body 40. The latching jaws 61 are located between the left and right clamping members 50 and are disposed so as to be able to touch the lower end of the body 40. [ The locking jaw 61 enters the inside of the casing 63 when the locking jaw 61 is pressed and the body 40 and the jaw member 50 can be separated from the bit 20.

When the user holds the handle 10 and rotates the bit 20 because the stopper 61 is sandwiched between the left and right clamping members 50, the clamping jaw 61 pushes the clamping member 50 The clamping member 50 is also rotated simultaneously with the bit 20. When the clamping member 50 is not rotated together with the bit 20, when the screw is loosened or clamped, the bit 20 rotates and the clamping member 50 holding the screw head is still standing, Can interfere with work for. Thus, the clamping member 50 is always configured to rotate with the bit 20.

The operation of the screwdriver preventing driver according to an embodiment of the present invention constructed as described above will be described with reference to FIGS. 5 to 7. FIG.

As shown in FIG. 5, the clamping member 50 remains closed until the tip 25 of the bit 20 contacts the screw head 100 to be unscrewed.

6, when the driver is moved downward, the lower end of the clamping member 50 is brought into contact with the upper portion of the screw head 100 so that the clamping member 50 moves upward along the bit, And a sharp bottom end is fitted in the groove formed in the screw head 100. [ At the same time, the pair of clamping members 50 slides outward while coming into contact with the head 100 of the convex screw, and then spreads to the left and right.

7, when the bit 20 is turned and the screw 100 is slightly pulled out, the clamping member 50 is lowered and simultaneously closed so that the edge of the screw head 100 is clamped And is caught in the groove 51. When the screw is continuously loosened in this state, the clamping member 50 is rotated together while holding the screw head, and the screw is prevented from falling down by the clamping member 50 even when the screw is completely removed.

In order to fasten the screw, the screw 50 is first opened, the screw head 100 is inserted, and the screw is screwed so that the screw 50 is caught by the screw head as shown in FIG. 7, Insert the screwdriver into the gap and screw the screw into the screw hole. Since the clamping member 50 slightly holds the screw head slightly, the screw head immediately before the screw hole is pushed slightly against the clamping member 50, and the clamping member 50 is naturally opened to release the screw head that has been held .

8 to 10 show a screwdriver preventing driver according to another embodiment of the present invention.

Referring to FIGS. 8 to 10, the screw drop prevention driver of the present invention includes a handle 10, a bit 20, and a gripping means.

Since the handle 10 and the bit 20 are the same as those in the above-described embodiment, a detailed description thereof will be omitted.

However, this embodiment differs from the embodiment of FIG. 1 in that the bit 20 has two or more fixing grooves 23 formed therein. The fixing groove 23 is vertically spaced two or three or more in the bit. In the illustrated example, two fixing grooves 23 are formed which are vertically spaced apart. The fixing groove 23 is formed at a predetermined depth from the outer surface of the bit 20.

The gripping means is mounted on the bit to hold the screw head in engagement with the screw head.

The illustrated gripping means comprises a head portion 70 which is formed so that the bit 20 penetrates up and down to surround the bit 20 and is movable along the length of the bit 20, 20, a spring 80 installed inside the head part 70, a body 40 coupled to the lower part of the head part 80, 40, and includes a pair of clamp members 50 provided on both sides of the bit 200 so as to be opened or narrowed.

The head portion 70 includes a lower housing 75 and an upper housing 71.

The lower housing 75 is formed into an empty hollow cylindrical shape. A circular insertion hole is formed in the lower part of the lower housing 75 so that the upper part of the body 40 can be inserted. A spring (80) is housed inside the lower housing (75). The spring (80) is installed to surround the bit (20). A coil spring can be used as the spring 80. [ The spring 80 serves to press the body 40 downward.

The upper housing 71 is formed on the upper portion of the lower housing 75. The upper housing 71 has a cylindrical shape larger in diameter than the lower housing 75. The upper housing 71 may be formed in a shape that a cover 72 is screwed on the upper part. In this case, the lid 72 may be provided with a hole through which the bit 20 passes. A fixing unit (90) is installed inside the upper housing (71).

The fixed unit 90 serves to fix the head unit 70 at a position corresponding to one of the two fixing grooves 23 formed at regular intervals in the bit 20. [

The fixing unit 90 includes an elastic body 91 provided inside the upper housing 71 and a fixing member 90 which is elastically supported in the fixing groove 23 by the elastic body 91 in the direction of the outer peripheral surface of the bit 20, And an engaging jaw 95 to be engaged.

The elastic body 91 is formed by bending a plate-shaped metal into a U-shape. Such an elastic body 91 applies an elastic force in a direction to widen outward when the widened portion becomes narrow.

The latching jaw 95 is formed to protrude from one side of the elastic body 91. The latching jaw 95 is formed in the elastic body 91 in a state of being inserted into the access groove formed in the inner wall 73 of the upper housing 71. The locking protrusion 95 protruding through the access groove is caught by the locking groove 23 provided on the bit 20 to prevent the upper housing 71 from moving up and down.

The body (40) has a circular tubular structure with a hollow interior. The bit 20 penetrates in the vertical direction of the body 40. The body 40 can move within a certain range in the vertical direction corresponding to the contraction and expansion of the spring 80.

The upper portion of the body 40 is inserted into the lower housing 75 and is movable in the vertical direction. The outer diameter of the body 40 is formed to be smaller than the inner diameter of the lower housing 75. A stopper 43 is provided on the bottom of the lower housing 75 to prevent the body 40 from being detached from the lower housing 75.

A pair of left and right clamping members 50 are formed at the bottom of the body 40. Since the structure and operation of such a clamping member are the same as those of the above-described embodiment, a detailed description thereof will be omitted.

8 to 10 described above can be used by fixing the gripping means to the upper side of the bit or fixing it to the lower side of the bit as necessary.

That is, when the screw head is to be caught by the clamping member, the clamping unit is fixed to the fixing groove located below. 5 to 7 in this state.

When the user wants to use a conventional driver without using the function of the gripping means, the gripping means is fixed to the fixing groove located above by using the fixed unit. In this state, since the holding means is located on the upper side of the bit, it can be used like a normal driver.

As described above, the present invention shown in FIGS. 8 to 10 can freely adjust the position of the holding means using the fixed unit, thereby greatly increasing the convenience of the user.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the accompanying drawings. And modifications are within the scope of the appended claims.

The use of stainless steel screws that do not stick to magnets in the industrial field has been increasing. The present invention can effectively replace the screwdriver preventing driver using the conventional magnets, as well as to enable smooth operation.

10: handle 20: bit
25: Tip 30: Spring
40: body 50:
51: Tongue groove 60: Jamming means
61: latching jaw 65: elastic body

Claims (8)

A handle;
A bit coupled to a lower portion of the handle and having a straight or cross-shaped tip at an end;
And gripping means provided on the bit for catching the screw head when the tip is engaged with the screw head,
Wherein the gripping means comprises a spring which is supported by the lower portion of the handle and surrounds the bit, and a pipe having an upper surface and a lower surface opened, the bit passing vertically and the upper end abutting the lower end of the spring, A body which is movable in a vertical direction within a predetermined range in response to contraction and is rotated together with the bit, and a pair of left and right pairs of a body extending downward from the body and spaced apart from each other And a clamping member,
A clamping groove is formed on an inner bottom surface of the clamping member so that the edge of the screw head can be inserted,
Wherein the gripping means is opened and closed by the screw head on which the clamping member is lifted when the screw is loosened by inserting the tip into the groove of the screw head so that the edge of the screw head is inserted into the clamping groove, Wherein the screw driver is formed to catch the screw head. The method according to claim 1,
Wherein the gripping means further comprises an engaging means for restricting the downward movement of the body by allowing the lower end of the body to be hooked when the body falls to the maximum. 3. The method of claim 2,
Wherein the engaging means is configured to transmit the rotational force of the bit to the clamping member so that the clamping member and the body rotate together with the bit when the bit is rotated. The method according to claim 2 or 3,
The engaging means may include a casing embedded in the bit, an elastic body provided in the casing, and an elastic member provided on the casing to be elastically supported by the elastic body and projecting outwardly of the bit so as to engage with the lower end of the body And a latching jaw positioned between the pair of clamping members. A handle;
A bit coupled to a lower portion of the handle and having a straight or cross-shaped tip at an end;
And gripping means provided on the bit for catching the screw head when the tip is engaged with the screw head,
A holding unit for holding the head at a specific position of the bit; and a holding unit for holding the head at a specific position of the bit, A body coupled to a lower portion of the head portion and having an upper surface and a lower surface opened to allow the bit to pass upward and downward and to move up and down within a predetermined range corresponding to the expansion or contraction of the spring; And a pair of right and left clamping members extending downward from the body and spaced apart from each other with the bit interposed therebetween,
And a clamping groove is formed on an inner bottom surface of the clamping member so that an edge of the screw head can be inserted. [6] The apparatus of claim 5, wherein the head unit comprises a lower housing having an upper portion of the body inserted therein and having the spring incorporated therein, and an upper housing formed at an upper portion of the lower housing, Screwless screwdriver. The screw driver according to claim 6, wherein the fixing unit fixes the upper housing to a position corresponding to any one of the at least two fixing grooves formed at regular intervals in the bit. 8. The connector according to claim 7, wherein the fixing unit comprises an elastic body provided inside the upper housing, and a latching jaw which is elastically supported in the direction of the outer circumferential surface of the bit by the elastic body and is coupled to the fixing groove. Fall prevention driver.

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