WO2010101341A1

WO2010101341A1 - Screwdriver bit with screw supporter and screwdriver

Info

Publication number: WO2010101341A1
Application number: PCT/KR2009/005518
Authority: WO
Inventors: 최상호
Original assignee: Choi Sang Ho
Priority date: 2009-03-03
Filing date: 2009-09-28
Publication date: 2010-09-10

Abstract

The present invention relates to a screwdriver bit and a screwdriver with the same, more specifically to a screwdriver bit that supports a screw using a screw supporting cylinder so as to prevent the separation of the screw being driven and secure the screw accurately in the desired position, and also to a screwdriver including the screwdriver bit. The screwdriver bit comprises: a screw grip part providing torque to a screw, a coupling part inserted into a driver handle or a bit insertion part of an electric driver, and a rod-shaped body connecting the screw grip part and the coupling part. The screwdriver bit also includes an elastic member providing elastic force in the longitudinal direction of the body, a screw supporting cylinder which surrounds the exterior of the body and is applied with the elastic restoration force by the elastic member toward the coupling part, thereby being able to protrude beyond the screw grip part, and a fixed cylinder which is rotated along with the body and one end of which is fixed between the screw supporting cylinder and the coupling part.

Description

Screwdriver bits and screwdrivers with screw support means

The present invention relates to a screwdriver bit and a screw driver comprising the same. More particularly, the present invention relates to a screw driver including a screw driver and a screw driver including the same, by using a screw support cylinder to support the screw, thereby preventing the screw from falling off when the screw is fastened, and fixing the screw exactly where desired.

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 screwdriver or a bit changeable screwdriver having a "+" or "-" screw grip is usually used.

Of the above screw parts, when screwing a screw that does not have a female screw such as a nut as a combination, that is, a screw or the like with a screwdriver, the screwdriver is pressed with a strong pressure to turn the screw. However, since there is no separate means for supporting the screw during the fastening operation, it is necessary to exactly coincide with the central axis of the screw and the screwdriver or to hold the screw with a finger and firmly fix the screw to fasten the screw in a desired position. However, if the screw is inclined even slightly away from the central axis of the screwdriver, the screw is separated or collapsed, there is a problem that the fastening is difficult.

In addition, when performing the above fastening operation with a screwdriver, it is necessary to turn the screwdriver with both hands, since the rotational resistance of the screw is generated after the screw is embedded in a certain depth. However, the conventional screwdriver is not provided with a separate handle other than the driver handle, there was a difficulty in tightening the screw.

SUMMARY OF THE INVENTION An object of the present invention is to provide a screwdriver bit and a screwdriver including the same, which can fasten a screw in a desired position.

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

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 a rod connecting the screw holding portion and the coupling portion (棒) A screwdriver bit comprising an upper body portion, comprising: elastic means for adding an elastic force in the longitudinal direction of the body portion, receiving an elastic force surrounding the outer surface of the body portion and returning to the coupling portion direction by the elastic means, The present invention provides a screwdriver bit further including a screw support cylindrical body that can protrude further forward than the screw gripping portion.

In addition, in order to be configured to operate with both hands at a time when a large rotational force is required when fastening the screw with a screwdriver, one end is rotated integrally with the body portion and fixed between the screw support cylinder and the coupling portion It is configured to further include a fixed cylinder.

An end portion of the coupling portion of the screw support cylindrical body has a block portion formed therein, and a through hole into which the body portion is inserted in the center of the block portion is formed, and the elastic means has one end supported by the block portion, and the body portion Further comprising a stopper protruding in the elastic means, it is preferable that both ends are supported and compressed by the stopper and the blocking portion.

On the other hand, in another aspect, the present invention provides 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-shaped body connecting the screw holding portion and the coupling portion. In the screwdriver bit comprising a portion, the elastic means for adding an elastic force in the longitudinal direction of the body portion, receiving the elastic force surrounding the outer surface of the body portion and returned to the coupling portion by the elastic means and the longitudinal direction of the body portion According to the screw holding portion further includes a screw support cylindrical body that can protrude further forward, wherein the end portion of the coupling portion of the screw support cylindrical body is formed with a block portion, the through portion through which the body portion is inserted into the center of the block portion A ball, the body portion has a polygonal cross section, and the through hole rotates the cylindrical body for supporting the screw. The provides the polygonal cross sectional shape of the screw driver bit of the rotation is prevented for the body part to be transmitted to the body portion.

The front end of the screw support cylindrical body is preferably further provided with a rotating cylinder that rotates with respect to the screw support cylinder when the body portion rotates.

On the other hand, in another aspect of the present invention, the screw gripping portion for applying a rotational force to the screw, the coupling portion inserted into the bit inserting portion of the driver handle or the electric driver, and the rod-shaped connecting the screw holding portion and the coupling portion A screwdriver bit comprising a body portion, comprising: elastic means for adding an elastic force in the longitudinal direction of the body portion, receiving an elastic force surrounding the outer surface of the body portion and returning in the direction of the coupling portion by the elastic means; Further comprising a screw support cylindrical body that can protrude further forward than the screw gripping portion, the end portion of the coupling portion side of the screw support cylindrical body is formed with a blockage, the body portion is inserted into the center of the blockage portion A through hole is formed, and the body portion has a circular cross section at the screw grip portion and a polygonal end at the coupling portion side. It includes, The through-hole is freely rotated with respect to the body portion in the circular cross section, the screw is a shape in which the rotation of the polygonal cross section is prevented to transmit the rotational force of the screw support cylindrical body in the polygonal cross section Provides driver bits.

In the present invention, it is preferable that a spring is located between the screw support cylinder and the coupling portion.

In addition, in the present invention, it is preferable that the screw gripping portion is attached to and detached from the body portion.

On the other hand, the present invention is a holder portion for inserting the bit blade formed with a screw gripping portion, a coupling portion inserted into the bit inserting portion of the driver handle or the electric driver, rod-shaped connecting the screw holding portion and the coupling portion In the screwdriver bit comprising a body portion, the elastic means for adding an elastic force in the longitudinal direction of the body portion, the outer surface of the body portion receives the elastic force to be returned to the coupling portion direction by the elastic means in the longitudinal direction of the body portion The screw support cylindrical body that can protrude further than the screw holding portion, characterized in that it further comprises a fixed cylinder which is integrally rotated with the body portion and one end is fixed between the screw support cylindrical body and the engaging portion. Screwdriver bits are also provided.

In the above inventions, a transparent tube or an observation hole can be formed in the screw support cylinder to check the internal screw state.

In addition, the present invention comprises a handle and a screwdriver bit coupled to the handle, the screwdriver bit is a screw gripping portion for applying a rotational force to the screw, the coupling portion inserted into the handle, the screw gripping portion and the coupling portion A screw screwdriver comprising a rod-shaped body portion for connecting; Elastic means for adding an elastic force in the longitudinal direction of the body portion; A cylindrical body for screw support that surrounds the outer surface of the body and receives elastic force returned by the elastic means in the direction of the coupling portion and protrudes further forward than the screw gripping portion in the longitudinal direction of the body portion; It provides a screw driver further comprising; a fixed cylinder fixed to the handle to surround a portion of the screw support cylindrical body.

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 the screw is pressed with a strong pressure for screw fastening, the screw does not fall off the central axis of the screw driver, so that the screw can be easily tightened at a desired point.

In addition, the present invention is configured to handle the screw holding the screwdriver with both hands. Therefore, the screw fastening operation is further facilitated because the screw screw bit has a structure suitable for turning the screwdriver bit with both hands at a time when a greater rotational force is required after the screw is embedded more than a certain depth.

1 is a diagram illustrating the structure and operating state of a screwdriver bit according to a first embodiment of the present invention;

2 is an explanatory view of the structure and operating state of a screwdriver bit according to a second embodiment of the present invention;

3 is a configuration diagram of a modified example of changing the fixed position of the fixed cylinder in the screwdriver bit according to the second embodiment of the present invention

4 is a configuration diagram of a screwdriver bit according to a third embodiment of the present invention

5 is a configuration diagram of a screwdriver bit according to a fourth embodiment of the present invention

6 is an explanatory diagram of the structure and operating state of a screwdriver bit according to a fifth embodiment of the present invention;

7 is a configuration diagram of a screwdriver bit according to a sixth embodiment of the present invention

Figure 8 is a block diagram of a transparent tube added to the front end of the screw support cylinder according to the present invention

Figure 9 is a block diagram showing the observation hole and the transparent protective body formed in the front end of the cylindrical support for screw according to the present invention

10 is a configuration diagram configured to mount the bit blade of the screwdriver bit according to the present invention

Figure 11 is a state diagram showing a state in which the screwdriver bit is mounted on the electric driver according to the present invention

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

1 is a view showing the structure and operation of the screwdriver bit according to the first embodiment of the present invention, the coupling portion 130 of the screwdriver bit is inserted into the driver handle 500 to help understand the operation process It is shown. The present invention can be used for all the fastening work of the screw-like parts like a conventional screwdriver tool, but will be described below with an example of a screw.

Referring to FIG. 1, the screw driver bit is inserted into a groove formed in the head of the screw 600 to apply a rotational force to the screw holding part 110, and a coupling part coupled to the handle 500 or the bit insertion groove of the electric driver. 130, a rod-shaped body portion 100 connecting the screw holding portion 110 and the coupling portion 130, and a stopper at a predetermined position of the body portion 100. 120 is protruding.

An elastic means, for example, a spring 310 that is supported and fixed to the stopper 120 is installed around the body portion 100, and the spring 310 exerts an elastic force on the screw support cylindrical body 200 to be described later. It is installed to

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 I am getting it. In addition, the screw support cylindrical body 200 is configured to compress the spring 310 when sliding and advancing 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 screwdriver with one hand, place it at the point to fasten the screw 600 as shown in Figure 1 (a) and the head of the screw 600 with the screw gripping portion 110 of the screwdriver bit Grasp wealth. At this time, if the screw holding portion 110 of the screw driver is formed of a magnet as known will be able to grip the screw 600 more easily.

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 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 screwdriver bit and the center line of the screw 600 slightly misaligned, the screw may be pushed downward from the fastening point without falling down.

In addition, during the said operation, the front-end | tip part of the cylindrical body for screw support and the circumferential part of a screw fastening point are contacted and supported by the whole perimeter. Therefore, the screw driver bit can be stably operated without being inclined sideways simply by applying force to the screw support cylindrical body 200.

In the first embodiment, the spring 310 is described as being supported by the stopper 120 and the blocking portion 220 in the screw support cylindrical body 200, that is, the rear of the screw support cylindrical body 200. Of course, the spring 310 may be fixedly installed at a position between the screw support cylindrical body 200 and the coupling portion 130. In this case, the spring 310 is extended as the screw support cylindrical body 200 slides forward, and the elastic force in the longitudinal direction of the body portion 100 so that the screw support cylindrical body 200 can be returned. Will be added. In this case, the stopper 120 formed in the body portion 100 is unnecessary. Such a configuration can be applied to any of the following embodiments even if not separately described.

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

2, the configuration of the screw holding portion 110, the body portion 100, the stopper 120, the spring 310, the screw support cylindrical body 200 of the screwdriver bit configuration of the first embodiment described above Is the same as However, in this embodiment, it is characterized in that the fixing cylinder 400 is further installed on the rear of the screw support cylindrical body 200 installed in the body portion 100. Hereinafter, in the embodiments to be described later it will be described that the fixed cylinder 400 is installed as an example of the fixed cylinder 400.

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 hold.

According to the configuration as described above, the screw support cylindrical body 200 is seated on the fixed cylindrical body 400 by the action of the spring 310, the screw gripping portion 110 when fastening the screw 600, etc. Sliding toward the) will appear on the inside and outside of the fixed cylinder (400). However, it should not be completely immersed inside the fixed cylinder 400 so as to hold the screw support cylindrical body 200 by sliding. Therefore, it is preferable that the length of the fixed cylindrical body 400 is shorter than the length of the screw supporting cylindrical body 200, or a stopper such as a protrusion is formed on the outer surface of the screw supporting cylindrical body 200.

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 screwdriver bit grips the head of the screw 600 to be positioned at the fastening position, the screw holding cylinder 200 is slid to support the screw 600 by sliding the cylindrical support body 200 described in the first embodiment. As shown.

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 cylinder 200 is released to retreat the screw support cylinder 200 to the rear. Then, by holding and turning the fixed cylindrical body 400 with the hand, a larger torque (T1 + T2) is applied to the screw 600 together with the hand holding the handle 500 to turn the screw 600 with greater force. It can be.

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 Let's go. In order to compensate for such a problem, 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.

Figure 3 is a modification of the fixed position or the formation position of the fixed cylinder 400, which is a configuration added to the screwdriver bit so as to apply a 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 screwdriver 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 torqued to the screwdriver bits.

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

In FIG. 3B, the fixed cylindrical body 400b is formed integrally with the bit support 501 provided in the insertion hole of the screwdriver 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 400b on the bit support 501, the fixed cylinder 400b is welded to the already formed bit support 501, or the fixed cylinder 400b and the bit support 501 in advance. ) May be integrally formed and injection molded into the driver handle 500 around the bit support 501.

The configuration of the

stationary cylinders

400a and 400b as described above is different from that of simply forming the handle 500 long. This is because the screw support cylindrical body 200 must protrude forward a predetermined length or more in order to support the screw 600, so that the overall length of the screw support cylindrical body 200 also requires a fairly long length to secure such a protruding length. As the screw support cylindrical body 200 is configured to be partially immersed in the fixed

cylindrical bodies

400a and 400b, the overall length of the screwdriver including the handle 500 is not excessively long and appropriately. It can be maintained.

If the handle 500 is responsible for the function of the fixed

cylinders

400a and 400b by forming the handle 500 long enough to hold it with both hands, the total length of the screwdriver is excessively increased and the material loss is caused. However, inconvenience in handling is inevitable.

4 illustrates a structure in which the

springs

310c and 310d are inserted between the

screw support cylinders

200c and 200d and the

stationary cylinders

400c and 400d according to the third embodiment of the present invention. Some configurations of the second embodiment have been changed.

In the structure shown in Fig. 4 (a), the stopper 120 supporting both ends of the spring is not formed in the body portion 100, and the engaging portion in which the spring 310c is formed at the distal end portion of the fixed cylindrical body 400c. It is supported between the 401 and the protrusion 201 formed in the rear end of the screw support cylindrical body 200c. Therefore, in this embodiment, when the screw support cylindrical body 200c slides forward, both ends of the spring 310c are supported and compressed by the locking portion 401 and the protruding portion 201, and the compressed spring 310c is pressed. It is comprised so that the cylindrical body 200c for screw support 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 (200c) is sliding. The anti-shake protrusion 202 is formed by inserting and fixing a projection 202 formed of a synthetic resin by drilling a small through hole in the screw support cylinder 200c, rather than being integrally formed with the screw support cylinder 200c. It is preferable. This is because the manufacturing operation is easy.

In the structure shown in Fig. 4 (b), the fixed cylinder 400d has a small diameter cylindrical portion 400d 'surrounding the body portion 100, and the spring 310d has a small diameter cylinder. It is supported between the locking portion 403 formed at the tip of the portion 400d 'and the blocking portion 220d formed at the rear end of the screw support cylindrical body 200d. Therefore, in the present embodiment, when the screw support cylindrical body 200d is slid and advanced, both ends of the spring 310d are supported and compressed by the locking portion 403 and the blocking portion 220d, and the compressed spring 310d is supported. Is configured to receive a return force. Here, the locking portion 403 serves as the stopper 120 of FIG. The fixed cylinder 400d can be easily held by hand and has a portion of the fixed cylinder 400d positioned at the rear side of the screw support cylindrical body 200d to have a good grip with the same surface height as the screw support cylindrical body 200d. Is formed.

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 310d, on the body portion 100 of the bit.

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

Also in this embodiment, there is no difference in the structure and action of supporting and fastening the screw as the cylindrical cylinder 200 for screw support. However, in the present embodiment, the body portion 100 'of the bit has a polygonal cross section, for example, a hexagonal cross-section rod, and the through hole 210' formed at the rear end of the screw support cylindrical body 200 is described above. It is formed in a shape for transmitting the rotational force of the body portion (100 ') to the screw support cylindrical body (Fig. 5 formed a through hole of the same hexagon as the cross section of the body portion).

According to the configuration as described above, the screw support cylindrical body 200 serves to support the screw to be fastened by sliding forward, and at the same time can apply a torque to the screw. In other words, if a larger torque is required after the screw is embedded in a predetermined depth or more, the screw together with the hand holding the handle 500 by turning the screw support cylinder 200 with the hand holding the screw support cylinder 200. Torque can be applied.

However, such a configuration is scratched while turning the handle 500 in the state in which the screw support cylindrical body 200 supports the screw, turning the peripheral portion of the screw support cylinder 200 is screwed. In order to solve such a 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. In addition, even if the screw support cylinder 200 rotates, the rotating cylinder 230 may be fixed in a stationary state, thereby preventing scratches from occurring on the periphery of the seat where the screw is to be stuck.

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

Also in this embodiment, there is no difference in the structure and action of supporting and fastening the screw as the cylindrical cylinder 200 for screw support. However, in the present embodiment, the body portion 100 of the bit has a circular cross section 100'a on the side of the screw gripping portion 110 and a polygonal cross section 100'b on the side of the coupling portion 130 of the bit with the handle. )

In addition, the screw support cylindrical body 200 is free to rotate around the body portion (100 'a) as shown in the enlarged view of the cross section X2-X2 of Figure 6 (a) in the position for supporting the screw. In addition, when the screw support cylindrical body 200 is returned to its original position, the shape and size of the through hole 210 'are formed to rotate integrally with the body portion (100'b) as shown in the enlarged view of the cross section X3-X3. In this embodiment, the through hole 210 'is formed in a hexagon, and the circular cross section 100'a of the body part 100 is slightly smaller than the hexagon through hole 210' so as to be freely rotatable. And, the polygonal cross-section portion (100 'b) is formed of a hexagonal cross-section 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. The hand holding the handle 500 is turned while pressing the screwdriver bit toward the screw while rotating the body portion 100 to transmit pressure and torque to the screw and the supported screw is to dig 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 screw 600 is fastened more than a predetermined length by the fastening operation, the support of the screw is no longer necessary, and the resistance to the rotation of the screw increases, so that a greater force is required for the screw fastening. At this time, the hand holding the screw support cylindrical body 200 is released and the screw support cylindrical body 200 is retracted and placed on the polygonal cross section 100'b of the body portion 100. Then, when holding the screw support cylindrical body 200 again and turn the body portion 100 together with the hand holding the handle 500, the torque to the screw 600 with both hands is further added at the appropriate time It can give great power. [Fig. 6 (b)].

7 shows the structure of a screwdriver bit according to a sixth embodiment of the present invention.

The screwdriver bit in this embodiment is a configuration in which the pressing means 900 is further added to the body portion 100 so as to press the head of the screw 600 during the fastening operation of the screw 600.

The pressing means 900 is receiving an elastic force forward by the spring 310 in the sliding state caught in the groove 170 formed in the body portion 100. When the screw 600 is fastened to a wall or the like, the pressing means 900 is made to fasten the screw 600 while pressing the head of the screw 600. Accordingly, the fastening operation is performed in a state where the screw 600 is more firmly supported. That is, when only the screw gripping portion 110 presses the screw 600, a state in which a force is applied to a point in the center of the head of the screw 600, the screw is likely to fall, or the head of the screw 600 Since the tip of the pressing means 900 is pressed together with the screw holding part 110 even in the vicinity of the part, the screw can be supported more stably.

8 and 9 illustrate various configurations in which a separate observation means is added to facilitate the observation of the screw 600 to be fastened.

8 is a transparent pipe 700 is added to the end of the screw holding portion 110, that is, the front end of the screw support cylindrical body 200 is configured to be able to visually check the progress of the screwing operation. 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 easily installed in the screw support cylindrical body 200 of all the above-described embodiments to easily check the working condition of the screw together with the support of the screw.

FIG. 9 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, the head portion of the screw in consideration of the length of the screw is usually made It is enough to form a length that can be confirmed.

In addition, if foreign matter enters or pinched in the observation hole 240 may interfere with the operation. Therefore, as shown in FIGS. 9B and 9C,

transparent protectors

800 and 820 are installed around the screw support cylindrical body 200 in which the observation hole 240 is disposed, and the observation hole 240 is provided. To prevent foreign substances from entering. The transparent protective member 800 of FIG. 9 (b) has a cylindrical shape and is fastened to the groove 250 formed on the outer circumferential surface of the screw support cylindrical body 200 as a projection, and the transparent protective body 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.

FIG. 10 illustrates a configuration in which the screw blade bit according to the present invention is modified, and the bit blade 160 in which the screw gripping portion is formed can be replaced.

The above configuration is to form a holder portion 150 in the body portion 100 of the screwdriver bit is configured to replace the separate bit blade 160 formed with the screw gripping portion (110). Accordingly, when a new bit blade 160 needs to be replaced due to abrasion of the screw gripping part 110, or when a bit blade 160 having a suitable standard is required to be replaced, it may be used interchangeably.

11 is a view showing a state in which a screwdriver bit 10 according to the present invention is fastened to an electric driver. The present invention is manufactured in the form of a bit to select a driver handle 500 or an electric driver as necessary, and then the bit 10 ) Can be used by inserting the coupling portion 130 of the handle 500 or the bit insertion groove of the electric driver.

While preferred embodiments and applications of the present invention have been shown and described above, the present invention is not limited to the specific embodiments and applications described above. In addition, various modifications may be made by those skilled in the art without departing from the spirit of the invention as claimed in the claims.

The present invention can be widely applied to increase the convenience of the user in the screwdriver related art for fastening the screw to the wall or screw fastening portion.

Claims

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 screwdriver bit comprising a rod-shaped body portion 100 to connect,

Elastic means 310 for adding an elastic force in the longitudinal direction of the body portion 100,

Wraps the outer surface of the body portion 100 and receives the elastic force returned to the coupling portion 130 direction by the elastic means 310 and more than the screw holding portion 110 in the longitudinal direction of the body portion 100 Cylindrical body for screw support 200 which can protrude forward,

Screw driver bits, characterized in that it further comprises a fixed cylinder 400 is rotated integrally with the body portion 100 and one end is fixed between the screw support cylindrical body 200 and the coupling portion 130.
The method of claim 1,

End of the coupling portion 130 side of the screw support cylindrical body 200 is formed with a block 220, a through hole 210 is formed in the center of the block 220 is inserted into the body portion,

The elastic means 310 is a screwdriver bit, characterized in that one end is supported by the clogging portion 220
The method of claim 2,

Further comprising a stopper 120 protruding from the body portion 100,

The elastic means 310 is a screwdriver bit, characterized in that both ends are supported by the stopper 120 and the blocking portion 220 is compressed.
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 screwdriver bit comprising a rod-shaped body portion 100 to connect,

Elastic means 310 for adding an elastic force in the longitudinal direction of the body portion 100,

Wraps the outer surface of the body portion 100 and receives the elastic force to return to the coupling portion 130 by the elastic means 310 and the screw holding portion 110 along the longitudinal direction of the body portion 100 Further comprising a screw support cylindrical body 200 which can protrude further forward,

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 body portion is a polygonal cross section,

The through-hole is a screwdriver bit, characterized in that the rotation of the polygonal cross section with respect to the body portion to prevent the rotational force of the screw support cylindrical body 200 to be transmitted to the body portion
The method of claim 4, wherein

A screwdriver bit is further provided at a front end of the screw support cylindrical body 200, wherein a rotating cylinder body 230 that rotates with respect to the screw support cylindrical body is further installed 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 screwdriver bit comprising a rod-shaped body portion 100 to connect,

Elastic means 310 for adding an elastic force in the longitudinal direction of the body portion 100,

Wraps the outer surface of the body portion 100 and receives the elastic force to return to the coupling portion 130 by the elastic means 310 and the screw holding portion 110 along the longitudinal direction of the body portion 100 Further comprising a screw support cylindrical body 200 which can protrude further forward,

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 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 is freely rotated with respect to the body portion in the circular cross-section, the screw 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 in the polygonal cross section driver beat
The method according to any one of claims 4 to 6,

Screw driver bit, characterized in that the spring 330 is located between the screw support cylindrical body and the coupling portion.
The method according to any one of claims 1 to 6,

The screw gripping portion 110 is a screw driver bit, characterized in that detachable to the body portion 100
Holder portion 150 for inserting the bit blade formed with a screw gripping portion 110, the coupling portion 130 is inserted into the screw insertion portion of the driver handle 500 or the electric driver, and the screw holding portion 110 In the screwdriver bit comprising a body portion 100 on the rod (棒) for connecting the coupling portion 130,

Elastic means 310 for adding an elastic force in the longitudinal direction of the body portion 100,

Wraps the outer surface of the body portion 100 and receives the elastic force returned to the coupling portion 130 direction by the elastic means 310 and more than the screw holding portion 110 in the longitudinal direction of the body portion 100 Cylindrical body for screw support 200 which can protrude forward,

Screw driver bits, characterized in that it further comprises a fixed cylinder 400 is rotated integrally with the body portion 100 and one end is fixed between the screw support cylindrical body 200 and the coupling portion 130.
The method according to any one of claims 1 to 6, 9,

Screw driver bits, characterized in that the transparent tubular body (700, 800, 820) is further installed in the screw support cylinder to check the state of the screw inside
The method according to any one of claims 1 to 6, 9,

Screw driver bit, characterized in that formed through the observation hole 240 through which the state of the screw penetrates the cylindrical body for screw support
A screw driver in which the screw driver bit of any one of claims 1 to 6 and 9 is installed.
It consists of a screwdriver bit coupled to the handle 500 and the handle 500

The screwdriver bit is

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 In a screw driver comprising a body portion 100;

Elastic means (310) for adding an elastic force in the longitudinal direction of the body portion (100);

Wraps the outer surface of the body portion 100 and receives the elastic force returned to the coupling portion 130 direction by the elastic means 310 and more than the screw holding portion 110 in the longitudinal direction of the body portion 100 A screw support cylindrical body 200 which can protrude forward;

And a fixed cylinder 400 fixed to the handle 500 to surround a portion of the screw support cylindrical body 200.