KR100926891B1 - Screwdriver and screwdriver bit including a means of supporting a screw - Google Patents

Abstract

PURPOSE: A screwdriver and a screwdriver bit equipped with a means for supporting a screw support is provided to prevent a screw from being separated from a center axis of a screwdriver although applying strong pressure to a screw. CONSTITUTION: A screwdriver bit is composed of a stopper, an elastic member(310), a screw supporting cylinder(200), and a fixing cylinder(400). The stopper is projected in a body unit(100). The elastic member is installed on the outside of the body unit to apply to the longitudinal direction of the body unit. The moving of the elastic member facing to a screw holding unit(110) is cut off by the stopper. The screw supporting cylinder surrounds the body unit and the elastic member. The screw supporting cylinder is projected further forward than the screw holding unit in sliding to the longitudinal direction of the body unit. The screw supporting cylinder compresses the elastic member in sliding. The fixing cylinder is integrally rotated with the body unit and covers a part of the screw supporting cylinder.

Description

Screwdriver and screwdriver bit including a means of supporting a screw}

The present invention relates to a screw driver bit and a screw driver including the same, and more particularly, to support a screw by using a cylindrical body for screw support to prevent the screw from falling off when screwing and to fix the screw exactly where desired, and A screwdriver comprising the same.

Screws are used in countless places throughout the industry. In particular, various types of screws are produced and used for fastening and fixing various machinery, furniture, walls, instruments, and home appliances.In order to fasten or loosen such screws, a “+” or “-” screw holding part is usually used. You will use a driver with a bit or a bit-switchable driver.

When screwing a screw that does not have a female thread such as a nut as a combination among the screw parts mentioned above, that is, a screw or the like, with a screwdriver on a wall or a furniture, the screw should be turned while pressing the screwdriver with a strong pressure. Since there is no means to support the screw, the screw and screw driver must be aligned exactly, or the screw should be firmly fixed by holding the screw with your finger to secure the screw in the desired position. If it is tilted off, the screw is separated or collapsed, there was a problem that the fastening is difficult.

In addition, when performing the above fastening operation with a screwdriver, after the screw is embedded in a certain depth, the rotational resistance of the screw is generated more, it is necessary to turn the driver with both hands, but the conventional driver is separate from the driver handle There is no difficulty in fastening the screw because the handle is not provided.

It is therefore an object of the present invention to provide a driver bit and a screwdriver comprising the same that can fasten a screw to a desired position.

Still another object of the present invention is to provide a driver bit having a structure suitable for operating with both hands and a screw driver including the same when the screw is fastened with a screwdriver when a high rotational force is required.

Driver bit according to the present invention for achieving the above object is a screw gripping portion for applying a rotational force to the screw, a coupling portion inserted into the bit inserting portion of the driver handle or the electric driver, and connecting the screw holding portion and the coupling portion A driver bit comprising a rod-shaped body portion, comprising: a stopper protruding from the body portion, installed on an outer surface of the body portion to add an elastic force in the longitudinal direction of the body portion, and the screw wave by the stopper. It is formed of a cylindrical body that can be projected forward than the screw holding portion when the elastic means to block the progress toward the branch, the body portion and the outer surface of the elastic means and sliding in the longitudinal direction of the body portion, Screw support cylinder for compressing elastic means, the screw support circle rotates integrally with the body portion It characterized in that it comprises a fixed cylinder which is installed to surround a portion of the cylinder.
In addition, the end portion of the coupling portion of the screw support cylindrical body is formed with a block portion, and forms a through hole into which the body portion is inserted in the center of the block portion, the elastic means is supported at both ends by the stopper and the block portion. And is compressed.
In addition, the end of the coupling portion side of the fixed cylinder is characterized in that the fixed to the body portion.
On the other hand, the driver bit of the present invention is a screw gripping portion for applying a rotational force to the screw, a coupling portion inserted into the bit inserting portion of the driver handle or electric driver, and a rod connecting the screw holding portion and the coupling portion (棒) A driver bit comprising an upper body portion, comprising: a stopper protruding from the body portion, installed on an outer surface of the body portion to add an elastic force in the longitudinal direction of the body portion, and to the screw holding portion by the stopper; The elastic means is cut off, the body portion and the outer surface of the elastic means is formed in a cylindrical that can protrude further forward than the screw holding portion when sliding in the longitudinal direction of the body portion, the compression of the elastic means when sliding To include a screw support cylindrical body, the end portion of the coupling portion of the screw support cylindrical body A force portion is formed, and a through hole into which the body portion is inserted is formed in the center of the blockage portion, wherein the elastic means is configured so that both ends are supported and compressed by the stopper and the blockage portion, and the body portion has a polygonal cross section. The through-hole is characterized in that the rotation of the polygonal cross section is prevented so as to transmit the rotational force of the screw support cylindrical body portion.
On the other hand, the driver bit of the present invention is a screw gripping portion for applying a rotational force to the screw, a coupling portion inserted into the bit inserting portion of the driver handle or the electric driver, and a rod connecting the screw holding portion and the coupling portion (棒) A driver bit comprising a body part on a side), the stopper protruding from the body part, installed on an outer surface of the body part to add an elastic force in the longitudinal direction of the body part, and to the screw holding part by the stopper. The elastic means is blocked, the body portion and the outer surface of the elastic means and is formed into a cylindrical that can protrude forward than the screw holding portion when sliding in the longitudinal direction of the body portion, the elastic means when sliding Comprising a screw support cylindrical body for compressing, the end portion of the coupling portion of the screw support cylindrical body A blockage part is formed, and a through hole into which the body part is inserted is formed at the center of the blockage part, and the elastic means is configured to be supported by both ends by the stopper and the blockage part, and the body part is the screw holding part side. It includes a circular cross section and a polygonal cross section of the coupling portion, wherein the through hole is so that the screw support cylindrical body is freely rotated in the circular cross section, to transmit the rotational force of the screw support cylindrical body in the polygonal cross section The polygonal cross section is characterized in that the rotation is inhibited.
In addition, the driver bit of the present invention is characterized in that the spring is located between the screw support cylinder and the coupling portion.
In addition, the driver bit of the present invention is characterized in that the front end of the screw support cylindrical body is further provided with a rotating cylinder that rotates with respect to the screw support cylinder when the body portion rotates.
On the other hand, the present invention includes a screw gripping portion for applying a rotational force to the screw, a coupling portion inserted into the bit insertion portion of the driver handle or the electric driver, and a rod-shaped body portion connecting the screw gripping portion and the coupling portion In the driver bit, the elastic means for adding an elastic force in the longitudinal direction of the body portion, is formed of a cylindrical which can project more forward than the screw holding portion when the outer surface surrounding the body portion and sliding in the longitudinal direction of the body portion, And a screw cylinder for receiving the elastic force returned by the elastic means toward the coupling portion when sliding, and a fixed cylinder having one end rotated integrally with the body portion and provided between the screw supporting cylinder and the coupling portion. It provides a driver bit characterized in that. Even in such a driver bit, the end portion of the coupling portion of the screw support cylindrical body has a block portion formed therein, and forms a through hole into which the body portion is inserted in the center of the block portion, and the elastic means is supported at one end by the block portion. It is preferable to be.
On the other hand, the present invention is a screw driver comprising a handle and a driver bit coupled to the handle; The driver bit includes a screw gripping portion for applying a rotational force to the screw, a coupling portion inserted into the handle, and a rod-shaped body portion connecting the screw gripping portion and the coupling portion, and on the outer surface of the body portion. ) Is provided with an elastic means for adding an elastic force in the longitudinal direction of the body portion, and when formed to surround the outer surface of the body portion and sliding in the longitudinal direction of the body portion, is formed into a cylindrical that can protrude further forward than the screw gripping portion When the sliding, the screw support cylindrical body is further provided to receive the elastic force to be returned to the coupling portion by the elastic means; The handle is provided with a screw driver in which a fixed cylinder is installed to surround a portion of the screw support cylinder.
The present invention also provides a screw driver comprising a handle and a driver bit associated with the handle; The driver bit includes a screw gripping portion for applying a rotational force to the screw, a coupling portion inserted into the handle, and a rod-shaped body portion connecting the screw gripping portion and the coupling portion, and on the outer surface of the body portion. Elastic means for elasticity in the longitudinal direction of the body portion while being stretched from) and a cylindrical body which receives a return force by the elastic means and surrounds the outer surface of the body portion and protrudes more forward than the screw gripping portion. A screw support cylindrical body; The handle is provided with a screw driver is further provided with a fixed cylinder to surround a portion of the screw support cylinder.
On the other hand, the screw support cylindrical body is preferably further provided with a transparent tube that can check the internal screw state.
In addition, an observation hole for checking the state of the screw may be formed through the screw support cylindrical body.

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The driver bit according to the present invention can support the screw during operation by providing a cylindrical body for screw support to the body portion of the bit to wrap around the portion to be screwed. Therefore, even if pressed with a strong pressure for screw fastening, the screw does not fall off the central axis of the driver can be easily performed at the desired point.

In addition, the present invention has a structure that is suitable for turning the screwdriver bits with both hands when the screw is embedded in a certain depth by a means capable of operating the screw with both hands, when a greater rotational force is required, the screw fastening operation is It becomes easier.

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

1 illustrates a structure and an operation process of a driver bit according to a first embodiment of the present invention, and illustrates a form in which a coupling unit 130 of the driver bit is inserted into the driver handle 500 to assist in understanding the operation process. Doing. The present invention can be used for all the fastening of the screw-like parts like a conventional driver tool, but will be described below with an example screw.

Referring to FIG. 1, the driver bit is coupled to a screw gripping portion 110 and a handle 500 or a bit inserting groove of an electric screwdriver that are inserted into a groove formed in the head of the screw 600 to apply rotational force. ) And the rod-shaped body portion 100 connecting the screw holding portion 110 and the coupling portion 130, the stopper 120 at a predetermined position of the body portion 100 Is formed.

An elastic means that is supported and fixed to the stopper 120 is installed around the body portion 100, that is, a spring 310 is installed in the present embodiment, and the spring 310 has a screw support cylindrical body 200 to be described later. It is installed to apply an elastic force to the.

The outer side of the spring 310 and the body portion 100 is wrapped with a screw support cylindrical body 200, the screw support cylindrical body 200 is the elastic force of the spring 310 in the blockage portion 220 formed at the rear end It is configured to compress the spring 310 when the screw support cylindrical body 200 is slid to move toward the screw holding portion (110). A through hole 210 through which the body part 100 of the bit passes is formed in the block 220 of the screw support cylindrical body 200.

The operation of the first embodiment configured as described above will be described. First, grasp the handle 500 of the driver with one hand, position it at the point where the screw 600 is to be fastened as shown in FIG. 1 (a), and hold the head of the screw 600 with the screw gripping portion 110 of the driver bit. do. At this time, the screw gripping portion 110 of the driver may be gripped by the screw 600 more easily if formed by a magnet as known.

After holding the screw 600, hold the screw support cylindrical body 200 with the other hand, and slide forward to as shown in Figure 1 (b) to fully wrap the screw 600, the handle 500 in that state If you rotate while pressing the screw 600 to give a force to the screw 600 is pressured downward will be embedded in the fastening point.

In the above process, the screw support cylindrical body 200 is wrapped around the screw 600, so the screw 600 is supported from the side so as not to tilt. Therefore, even if the direction of the force applied to the driver bit and the center line of the screw 600 slightly misaligned, the screw does not fall and can continue to be pushed downward from the fastening point.

Further, during the above operation, the tip of the screw support cylindrical body 200 and the circumferential portion of the screw fastening point are supported in contact with the entire circumference thereof, so that the driver bit is moved to the side only by applying force to the screw support cylindrical body 200. Work can be done stably without tilting.

Figure 2 shows the structure and operation of the driver bit according to the second embodiment of the present invention.

Referring to FIG. 2, the screw holding portion 110, the body portion 100, the stopper 120, the spring 310, the screw support cylindrical body 200 of the driver bit is the same as the configuration of the first embodiment described above. Same. However, in this embodiment, the fixed cylinder 400, more specifically, the fixed cylindrical body 400 in the present embodiment is further installed in the rear of the screw support cylindrical body 200 installed in the body portion 100 It is done. The fixed cylindrical body 400 is welded to the body portion 100 in a state where the handle 500 is installed, that is, the end portion of the coupling part 130 is blocked, unlike the cylindrical cylindrical support 200. 410) and the like is completely integrally fixed. However, the fixed cylindrical body 400 is not necessarily to be fixed integrally with the body portion 100 is enough to rotate integrally with the body portion 100, the shape of the fixed cylindrical body 400 is also hand It can be comprised by the cylinder which is polygonal in cross section so that it may be easy to grasp. According to such a configuration, the screw support cylindrical body 200 is seated on the fixed cylindrical body 400 by the action of the spring 310, when the screw 600 and the like when the screw holding part 110 toward Sliding is caused to appear on the inside and outside of the fixed cylinder (400). However, since it should not be completely immersed in the fixed cylinder 400 so as to hold and slide the screw support cylinder 200 by hand, the length of the fixed cylinder 400 is greater than the length of the screw support cylinder 200. It is preferable to form shortly, or to form the stopper, such as a protrusion, on the outer surface of the cylindrical body 200 for screw support.

On the other hand, a buffer spring 320 may be installed inside the fixed cylinder.

The operation of the second embodiment configured as described above will be described.

After the screw gripping portion 110 of the driver bit grips the head of the screw 600 to be positioned at the fastening position, the screw gripping portion 110 supports the screw 600 by sliding the screw support cylindrical body 200 as described in the first embodiment. same.

As described above, when the fastening operation of the screw 600 is carried out and the screw is nailed for a predetermined length or more, the tightening resistance is gradually increased, and a larger rotational force is required to turn the screw. At this time, since the screw 600 is already embedded at a predetermined depth at the fastening point, the cylindrical cylinder 200 for supporting the screw is no longer necessary. Therefore, the hand holding the screw support cylindrical body 200 is released to retreat the screw support cylindrical body 200 to the rear, and the hand holding the handle 500 when the fixed cylindrical body 400 is turned by the hand. With a larger torque (T1 + T2) to the screw 600 will be able to turn the screw 600 with a greater force.

On the other hand, release the hand holding the screw support cylindrical body 200 during the operation process to remove the force to pull it, the elastic force of the compressed spring 310 acts to suddenly return to the rear to generate impact force and noise To compensate for this, the shock absorbing of the screw support cylindrical body 200 is returned by installing the shock absorbing spring 320 inside the fixed cylindrical body 400.

FIG. 3 shows a change in the fixed position or the formation position of the fixed cylinder 400, which is a configuration added to the driver bit so as to apply force with both hands in the second embodiment.

In the above-described second embodiment, the fixed cylindrical body 400 is fixed to the body part 100 of the driver bit by welding or the like, but the fixed cylindrical body 400 may be fixed only to the body part 100 of the bit. It can be formed anywhere that can be used to torque the driver bits.

For example, in FIG. 3A, the fixed cylinder 400 ′ protrudes at the front end of the handle 500 and is integrally formed with the handle 500. Since the driver handle 500 is usually made of synthetic resin, the fixed cylinder 400 ′ may be manufactured by injection molding integrally with the handle 500.

In Fig. 3B, the fixed cylindrical body 400 " is formed integrally with the bit support 501 provided in the insertion hole of the driver bit. The bit support 501 is usually a metal body that is held around the coupling portion of the bit in the bit insertion groove of the driver handle 500. In order to form the fixed cylinder 400 ″ on the bit support 501, the fixed cylinder 400 ″ is fixed to the already formed bit support 501 by welding, or the fixed cylinder 400 ″ and the bit in advance. The support 501 may be integrally formed and manufactured by injection molding the driver handle 500 around the bit support 501.

The configuration of the fixed cylinders 400 'and 400 "is different from that of simply forming the handle 500 long. This requires that the screw support cylinder 200 protrude forward more than a predetermined length in order to support the screw 600, so that the overall length of the screw support cylinder 200 also requires a considerably longer length to secure such a protruding length. The screw support cylindrical body 200 is configured to be partially immersed in the fixed cylindrical bodies 400 'and 400 ″, so that the overall length of the driver including the handle 500 can be properly maintained. .

If the handle 500 is responsible for the function of the fixed cylinder (400 ', 400 ") by forming a long handle 500 to hold with both hands, the overall length of the driver is excessively extended and the material accordingly Loss or inconvenience in handling is inevitable.

Fig. 4 shows the structure of the driver bit according to the third embodiment of the present invention, and the configuration of some of the second embodiment is modified.

In this embodiment, the installation position of the spring 310 described above is changed in the second embodiment, and the stopper 120 supporting both ends of the spring is not formed in the body portion 100, and the spring 310 ' It is supported between the locking part 401 formed in the front-end | tip part of this fixed cylindrical body 400, and the protrusion part 201 formed in the rear end of the screw support cylindrical body 200 '. Therefore, in the present embodiment, when the screw support cylindrical body 200 'is slid and moved forward, both ends of the spring 310' are supported and compressed by the catching portion 401 and the protrusion 201, and the compressed spring ( 310 '), it is comprised so that the threaded cylindrical body 200' may receive a return force. In the same manner as the shock absorbing spring 320 of the second embodiment, reference numeral 320 denotes a role for mitigating an impact when the screw support cylinder 200 suddenly returns, and reference numeral 202 denotes a screw support cylinder as an anti-shake projection. It serves as a support member to prevent shaking when the sieve (200 ') is sliding. The anti-shake protrusion 202 is formed by drilling a small through hole in the screw support cylindrical body 200 'rather than being integrally formed with the screw support cylindrical body 200' and inserting and fixing the protrusion 202 formed of synthetic resin or the like. Forming would be desirable in terms of facilitating manufacturing operations.

This embodiment has a technical feature in that the drive bit can be manufactured without installing the stopper 120, which is a means for supporting the spring 310 ', on the body portion 100 of the bit.

5 shows the structure of the driver bit according to the fourth embodiment of the present invention.

Also in this embodiment, the structure and action of supporting and fastening the screw as the cylindrical cylindrical body for screw support is not different from the above embodiments, but the body portion 100 'of the bit is a polygonal cross section, for example, a hexagonal cross section. And a through hole 210 'formed at the rear end of the screw support cylindrical body 200 to transmit the rotational force of the body portion 100' to the screw support cylindrical body. Hexagonal through-holes identical to the negative cross-section were formed).

According to the configuration as described above, the screw support cylindrical body 200 serves to support the screw to be slid to the front, and at the same time, if a larger torque is required after the screw is embedded in a certain depth or more, the screw support cylindrical body Torque can be applied to the screw 600 together with the hand holding the handle 500 by turning the screw support cylindrical body 200 with the hand holding the 200.

However, in such a configuration, when the handle 500 is turned while the screw support cylindrical body 200 supports the screw 500, the periphery of the seat for the screw support cylindrical body 200 will be screwed into the screw 600. You will scratch it as you spin. In order to solve this problem, in this embodiment, the rotary cylinder 230 is installed in the annular groove 232 formed on the outer surface of the front end of the screw support cylindrical body 200 by being fitted into the protrusion 231. By such a configuration, the rotary cylinder 230 can freely rotate at the front end of the screw support cylindrical body 200, so that the rotating cylindrical body 230 can be fixed in a stationary state even if the screw support cylindrical body 200 rotates. Can be prevented from occurring scratches on the periphery of the place where the screw 600 is lodged.

6 shows the structure of a driver bit according to the fifth embodiment of the present invention.

Also in this embodiment, the structure and action of supporting and fastening the screw as the cylindrical cylinder for screw support is not different from the above-described embodiments, but in the present embodiment, the body portion 100 of the bit is held by the screw holding portion 110. A circular cross section (100'a) of the side and a polygonal cross section (100'b) of the coupling portion 130 side of the bit with a handle. In addition, the screw support cylindrical body 200 can rotate freely around the body portion 100'a as shown in the enlarged view of the cross section X2-X2 of FIG. When the cylindrical body 200 returns to its original position, it forms the shape and size of the through hole 210 'such that the cylindrical body 200 is integrally rotated with the body portion 100'b as shown in the enlarged view of the cross section X3-X3. In the example, specifically, the through hole 210 'is formed in a hexagon, and the circular cross section 100'a of the body portion 100 is slightly smaller than the hexagon through hole 210' so as to be freely rotatable and polygonal cross section. The portion 100'b is formed in a hexagonal cross section which is slightly smaller than the hexagonal through hole 210 'so that the torque of the screw support cylindrical body 200 can be transmitted to the body portion 100'b.

A buffer spring 330 may be installed between the screw support cylindrical body 200 and the coupling part (handle).

The operation of the fifth embodiment configured as described above will be described.

First, after placing the screw 600 in the fastening position and holding the screw with the screw gripping portion 110, the process of supporting the screw by sliding the screw support cylindrical body 200 is as described above. When the screwdriver is turned while pressing the driver bit toward the screw with the handle 500, the body 100 rotates to transmit pressure and torque to the screw, and the supported screw is dug into the surface of the screw fastening point. At this time, the screw support cylindrical body 200 is in a state of being held and supported by the other hand, and the through hole 210 'formed at the rear end of the screw support cylindrical body 200 rotates freely with respect to the body portion 100'a. Since the screw support cylindrical body 200 is in a stopped state while supporting the screw, the work is made. [Fig. 6 (a)].

When the fastening operation is performed, the screw 600 is fastened more than a certain length, the support of the screw is no longer necessary, and the resistance to screw rotation is increased, so that a larger force is required for screwing. At this time, the hand holding the screw support cylindrical body 200 is released and the screw support cylindrical body 200 is retracted and positioned on the polygonal cross-section portion 100'b of the body portion 100, and then the screw support cylindrical body is removed. When holding the handle 200 again and turning the body portion 100 with the hand holding the handle, the torque is applied to the screw 600 with both hands, so that a greater force can be given at the appropriate time. b)]

7 and 8 illustrate various configurations in which a separate observation means is added to facilitate observation of the screw to be fastened.

7 is configured to add a transparent tube 700 to the end of the screw holding portion 110, that is, the front end portion of the cylindrical cylinder for screw support, so that the progress of the screwing operation can be visually confirmed. The transparent tube 700 forms a groove 250 at the front end of the screw support cylindrical body 200 and forms a protrusion on the inner surface of the transparent tube 700 to be fastened, and firmly secured such as polycarbonate. Yet, it is preferable to be made of a synthetic resin excellent in impact resistance. The transparent tube 700 having such a configuration can be installed on the screw support cylindrical body 200 of all the above-described embodiments, and the working condition of the screw can be easily checked together with the support of the screw.

FIG. 8 is a view for elongating the observation hole 240 at the front end of the screw support cylinder 200 as a means for checking the working condition of the screw. The observation hole 240 is preferably formed to be narrow in width so that the screw does not come out when the screw support cylindrical body 200 supports the screw 600, the screw in consideration of the length of the screw that the normal operation is made It is enough to form a length enough to determine the head of the.

In addition, if foreign matter enters or is caught in the observation hole 240, the operation may be hindered, so that the circumference of the screw support cylindrical body 200 in which the observation hole 240 is located is illustrated in FIGS. 8 (b) and (c). As shown in the figure, the transparent protectors 800 and 820 are installed to block foreign substances from entering the observation hole 240. The transparent protector 800 of FIG. 8 (b) is formed in a cylindrical shape and fastened to the groove 250 formed on the outer circumferential surface of the screw support cylindrical body 200 as a projection, and the transparent protector of FIG. The 820 is formed to have a size enough to cover the observation hole 240 and is coupled to the protrusion 821 and the groove 260 formed around the observation hole 240.

9 shows a state in which the driver bit 10 according to the present invention is fastened to the electric driver, and the present invention is manufactured in the form of a bit to select the driver handle 500 or the electric driver as necessary, and then the bit 10. The coupling portion 130 can be used by inserting the handle 500 or the bit insertion groove of the electric driver.

While the above has been shown and described with respect to preferred embodiments and applications of the present invention, the present invention is not limited to the specific embodiments and applications described above, the invention without departing from the gist of the invention claimed in the claims Various modifications are possible by those skilled in the art.

1 is a detailed diagram illustrating the structure and operation of a driver bit according to a first embodiment of the present invention.

2 is a detailed diagram of the structure and operation of the driver bit according to the second embodiment of the present invention.

3 is a detailed configuration diagram of changing the fixed position of the fixed cylinder in the driver bit according to the second embodiment of the present invention.

4 is a detailed configuration diagram of a driver bit according to a third embodiment of the present invention.

5 is a detailed configuration diagram of a driver bit according to the fourth embodiment of the present invention.

6 is a detailed diagram of the structure and operation of the driver bit according to the fifth embodiment of the present invention.

Figure 7 is a detailed configuration of the transparent tube added to the front end of the cylindrical support for screw according to the present invention.

8 is a block diagram showing an observation hole and a transparent protector formed in the front end portion of the screw support cylindrical body according to the present invention.

9 is a state diagram showing a state in which the driver bit according to the invention mounted on the electric driver.

* Description of the symbols for the main parts of the drawings *

10: driver bits 100, 100 ', 100'a, 100'b: body part

110: screw holding part 120: stopper

130: coupling portion 200, 200 ': cylindrical body for screw support

201: protrusion 202: anti-shake protrusion

210, 210 ': Through hole 220: Blocked part

230: rotating cylinder 232: annular groove

231: protrusion 240: observation hole

250: home 260: home

310, 310 ′: Spring 320, 330: Shock spring

400, 400 ′, 400 ″, 400: Fixed cylinder

401: engaging portion 410: welding portion

500: handle 501: bit support

600: screw 700: transparent tube

710: projection 720: handle

800: cylindrical transparent protector 820: transparent protector

821: projection

Claims (16)

Screw holding unit 110 to apply a rotational force to the screw, the driver handle 500 or the coupling portion 130 is inserted into the bit insertion portion of the electric driver, the screw holding portion 110 and the coupling portion 130 In the driver bit comprising a body portion 100 on the rod to connect, Stopper 120 protruding from the body portion 100, An elastic means (310) installed on an outer surface of the body portion (100) to add elastic force in the longitudinal direction of the body portion (100) and to block the movement toward the screw holding portion by the stopper; Wrapping the outer surface of the body portion 100 and the elastic means 310 and is formed in a cylindrical that can protrude further forward than the screw holding portion 110 when sliding in the longitudinal direction of the body portion 100, Cylindrical member for screw support for compressing the elastic means (310) when sliding, Driver bits, characterized in that it comprises a fixed cylinder 400 which rotates integrally with the body portion 100 and is installed to surround a portion of the screw support cylindrical body 200. The method of claim 1, End of the coupling portion 130 side of the screw support cylindrical body 200 is formed with a blocking portion 220, and forms a through-hole 210 into which the body portion is inserted in the center of the blocking portion 220, The elastic means 310 is a driver bit, characterized in that both ends are supported by the stopper 120 and the blocking portion 220 is compressed. The method of claim 1, Driver bit, characterized in that the end of the coupling portion 130 side of the fixed cylinder 400 is fixed to the body portion 100 Screw holding unit 110 to apply a rotational force to the screw, the driver handle 500 or the coupling portion 130 is inserted into the bit insertion portion of the electric driver, the screw holding portion 110 and the coupling portion 130 In the driver bit comprising a body portion 100 on the rod to connect, Stopper 120 protruding from the body portion 100, An elastic means (310) installed on an outer surface of the body portion (100) to add elastic force in the longitudinal direction of the body portion (100) and to block the movement toward the screw holding portion by the stopper; Wrapping the outer surface of the body portion 100 and the elastic means 310 and is formed in a cylindrical that can protrude further forward than the screw holding portion 110 when sliding in the longitudinal direction of the body portion 100, It includes a screw support cylindrical body for compressing the elastic means 310 when sliding, End of the coupling portion 130 side of the screw support cylindrical body 200 is formed with a blocking portion 220, and forms a through-hole 210 into which the body portion is inserted in the center of the blocking portion 220, The elastic means 310 is configured so that both ends are supported and compressed by the stopper 120 and the blocking portion 220, The body portion is a polygonal cross section, The through-hole is a driver bit, characterized in that the rotation of the polygonal cross section is prevented to transmit the rotational force of the screw support cylindrical body 200 to the body portion Screw holding unit 110 to apply a rotational force to the screw, the driver handle 500 or the coupling portion 130 is inserted into the bit insertion portion of the electric driver, the screw holding portion 110 and the coupling portion 130 In the driver bit comprising a body portion 100 on the rod to connect, Stopper 120 protruding from the body portion 100, An elastic means (310) installed on an outer surface of the body portion (100) to add elastic force in the longitudinal direction of the body portion (100) and to block the movement toward the screw holding portion by the stopper; Wrapping the outer surface of the body portion 100 and the elastic means 310 and is formed in a cylindrical that can protrude further forward than the screw holding portion 110 when sliding in the longitudinal direction of the body portion 100, It includes a screw support cylindrical body for compressing the elastic means 310 when sliding, End of the coupling portion 130 side of the screw support cylindrical body 200 is formed with a blocking portion 220, and forms a through-hole 210 into which the body portion is inserted in the center of the blocking portion 220, The elastic means 310 is configured so that both ends are supported and compressed by the stopper 120 and the blocking portion 220, The body portion includes a circular cross section (100'a) of the screw holding portion 110 side and the polygonal cross section (100'b) of the coupling portion side, The through hole has a shape in which the screw support cylindrical body is freely rotated in the circular cross section and rotation of the polygonal cross section is prevented so as to transmit the rotational force of the screw support cylindrical body in the polygonal cross section. beat The method according to claim 4 or 5, Driver bit, characterized in that the spring 330 is located between the screw support cylindrical body and the coupling portion. The method of claim 4, wherein The front end of the screw support cylindrical body 200 is a driver bit, characterized in that the rotary cylinder 230 is further provided to rotate with respect to the screw support cylindrical body when the body portion rotates. Screw holding unit 110 to apply a rotational force to the screw, the driver handle 500 or the coupling portion 130 is inserted into the bit insertion portion of the electric driver, the screw holding portion 110 and the coupling portion 130 In the driver bit comprising a body portion 100 on the rod to connect, Elastic means 310 for adding an elastic force in the longitudinal direction of the body portion 100, Wrapping the outer surface of the body portion 100 and is formed in a cylindrical that can protrude further forward than the screw holding portion 110 when sliding in the longitudinal direction of the body portion 100, the elastic means 310 during the sliding Cylindrical member for screw support 200 which receives an elastic force to return to the coupling portion 130 by the), The driver bit is rotated integrally with the body portion 100 and the driver bit, characterized in that it further comprises a fixed cylinder 400 is installed between the screw support cylindrical body 200 and the coupling portion 130 The method of claim 8, End of the coupling portion 130 side of the screw support cylindrical body 200 is formed with a blocking portion 220, and forms a through-hole 210 into which the body portion is inserted in the center of the blocking portion 220, The elastic means 310 is a driver bit, characterized in that one end is supported by the block 220 A screw driver comprising a handle (500) and a driver bit coupled to the handle (500); The driver bit Screw holding part 110 for applying a rotational force to the screw, the coupling portion 130 is inserted into the handle 500, and the rod (상의) that connects the screw holding portion 110 and the coupling portion 130 It includes a body portion 100, On the outer surface (on) of the body portion 100 is provided with an elastic means 310 for adding an elastic force in the longitudinal direction of the body portion 100, Wrapping the outer surface of the body portion 100 and when sliding in the longitudinal direction of the body portion 100, is formed of a cylindrical that can protrude further forward than the screw holding portion 110 and the sliding means when the sliding (310) is further provided with a screw support cylinder 200 to receive the elastic force to return to the coupling portion 130 direction; The handle 500 is provided with a fixed cylinder 400 to surround a portion of the screw support cylindrical body 200; Screw driver A screw driver comprising a handle (500) and a driver bit coupled to the handle (500); The driver bit Screw holding part 110 for applying a rotational force to the screw, the coupling portion 130 is inserted into the handle 500, and the rod (상의) that connects the screw holding portion 110 and the coupling portion 130 It includes a body portion 100, An elastic means 310 which expands and contracts on the outer surface of the body portion 100 and adds an elastic force in the longitudinal direction of the body portion 100; Receiving a return force by the elastic means 310, while surrounding the outer surface of the body portion 100, the screw support cylindrical body 200 is formed of a cylindrical body that can protrude further than the screw holding portion 110 It includes; The handle 500 is further provided with a fixed cylinder 400 to surround a portion of the screw support cylindrical body 200; Screw driver The method according to any one of claims 1 to 5, 7 to 9, The driver bit, characterized in that the screw support cylindrical body is further provided with a transparent tube (700, 800, 820) to check the internal screw state The method according to any one of claims 1 to 5, 7 to 9, Driver bits, characterized in that formed through the observation hole 240 to check the state of the screw through the screw support cylindrical body 10. A screw driver in which the driver bits of any one of claims 1 to 5 and 7 are installed. delete delete

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