TWI782691B - Wrench extension rod - Google Patents

Abstract

A wrench extension rod includes a connecting piece and an extension member. The connecting member is provided with a wrench connecting portion and a first pivoting portion. The extension member is provided with a second pivoting portion. The second pivoting portion is pivotally connected with the first pivoting portion. The extension rod can provide an extend leverage arm through the above-mentioned structure, and also allows a user to select driving angles.

Description

wrench extension

The present invention mainly discloses an extension rod, especially a wrench extension rod.

Please refer to the "tool handle" patent case of Chinese Patent No. D189623, which is a tool handle, and the two ends of the tool handle can be respectively set as wrench heads of different sizes or shapes, such as an open shape or a plum blossom shape.

However, the main advantage of the above-mentioned tool is that it can provide two different driving modes. However, since the user’s hand can only be held between the two ends of the tool during use, the length of the force arm is short, and the user needs to use other tools to assist. Only then can the moment arm be extended, but the connection method of the auxiliary tool is limited due to the shape of the tool, resulting in the limitation of the driving angle of the auxiliary extension tool.

In view of the lack of the above-mentioned conventional structure, the inventors have designed a wrench extension rod, which can overcome all the shortcomings of the above-mentioned conventional structure.

The main purpose of the wrench extension bar of the present invention is to provide an extension bar including a connecting piece and an extension piece, the connecting piece is provided with a wrench connection part and a first pivot joint part, and the extension piece is provided with a second The pivotal joint, the second pivotal joint is pivotally arranged on the first pivotal joint, and the extension rod can not only extend the arm of the wrench through the above-mentioned structure, but also allow the user to select the driving angle.

The first pivot portion is provided with a first pivot hole axially along the pivot axis of the extension piece and a first locking tooth is arranged in the first pivot hole, and the second pivot portion is arranged along the pivot axis axis of the extension piece A second pivot hole is provided in the direction, and a second locking tooth is arranged in the second pivot hole. The extension rod includes a locking device, and the locking device can be switched between the locking state and the releasing state. Connected to the first pivotal part and the second pivotal part, the locking device is provided with a first clamping block, and the first clamping block is arranged on the first pivotal axis so as to move axially along the pivot axis of the extension piece. In the hole and the second pivot hole, the first block is provided with a third locking tooth. When the locking device is switched to the locking state, the third locking tooth simultaneously engages the first locking tooth and the second locking tooth. The extension piece cannot rotate relative to the connecting piece. When the locking device is switched to the release state, the third locking tooth engages the first locking tooth and disengages from the second locking tooth. The extension piece can rotate relative to the connecting piece. parts turn.

The extension piece is provided with a third pivotal portion, the first pivotal portion is arranged between the second pivotal portion and the third pivotal portion, and the third pivotal portion is axially A third pivot hole is provided and a fourth locking tooth is arranged in the third pivot hole, the locking device is provided with a second locking block, and the second locking block can move axially along the pivot axis of the extension piece is arranged in the first pivot hole and the third pivot hole, and the second locking block is provided with a fifth locking tooth. When the locking device is switched to the locking state, the fifth locking tooth simultaneously engages the first A locking tooth and the fourth locking tooth, when the locking device is switched to the release state, the fifth locking tooth engages with the first locking tooth and disengages from the fourth locking tooth.

The locking device is provided with an elastic member, the elastic member is arranged between the first block and the second block, one end of the elastic member is against the first block and the other end is against the second For two clamping blocks, the elastic member can push the first clamping block and the second clamping block to move away from each other.

One end of the first block adjacent to the second block is provided with a first slot, one end of the second block adjacent to the first block is provided with a second slot, and one end of the elastic member is disposed on the The other end of the first slot abuts against the second slot, and when the locking device is switched to the release state, the second block abuts against the first block.

The locking device is provided with a first push button and a second push button, the first push button is arranged in the second pivot hole, the first push button leans against the first block opposite to the second At one end of the block, the second push button is disposed in the third pivot hole, and the second push button leans against an end of the second block opposite to the first block.

The locking device is provided with a first locking member and a second locking member, the first locking member passes through the first pressing button from the side of the first pressing button opposite to the first block and Connected to the first clamping block in a screw-locking manner, the second locking member passes through the second pressing button from the side of the second pressing button opposite to the second clamping block and is connected to the first clamping block in a screw-locking manner. Two blocks.

The locking device is provided with a first fastener and a second fastener, the first fastener is arranged in the second pivot hole and is located on the side of the second locking tooth opposite to the first locking tooth, the The second buckle is disposed in the third pivot hole and is located on the side of the fourth locking tooth opposite to the first locking tooth. When the locking device is switched to the locking state, the third locking tooth abuts against the In the first fastener, the fifth latch abuts against the second fastener.

The wrench connection part is provided with a front face along the direction parallel to the pivot axis of the extension part, and the wrench connection part is provided with a first side and a side opposite to the first side along the direction perpendicular to the pivot axis axis of the extension part. On the second side, the wrench connection part is provided with a first buckle arm and a second buckle arm, the first buckle arm is arranged on the front side and adjacent to the first side, the second buckle arm is arranged on the On the front and adjacent to the second side, the distance from one end of the first buckle arm adjacent to the first pivot to the first pivot forms a first length, and the second buckle arm is away from the first pivot The distance from one end of the part to the first pivotal part forms a second length, and the second length is smaller than the first length.

Other objects, advantages and novelties of the present invention will be more apparent from the following detailed description and associated drawings.

Regarding the technology, means and effects used in the present invention, a preferred embodiment is given and described in detail below with the drawings. This is for illustration only, and is not limited by this structure in the patent application.

Referring to Fig. 1 to Fig. 6, it is a three-dimensional appearance view, a three-dimensional exploded view, a sectional structure view, an action view and a use state view of the wrench extension rod of the present invention. The extension rod 10 of the present invention includes a connecting piece 20, an extension piece 30 and a locking device 40; wherein:

The connecting member 20 is provided with a wrench connecting portion 21 and a first pivoting portion 22 .

The extension member 30 is provided with a second pivot portion 31 , and the second pivot portion 31 is pivotally disposed on the first pivot portion 22 .

The first pivot portion 22 is provided with a first pivot hole 221 axially along the pivot axis of the extension piece 30 and a first locking tooth 222 is disposed in the first pivot hole 221 , and the second pivot portion 31 is arranged along the A second pivot hole 311 is arranged axially on the pivot axis of the extension member 30 and a second locking tooth 312 is arranged in the second pivot hole 311. The locking device 40 can be switched between a locking state and a releasing state. Connected to the first pivotal portion 22 and the second pivotal portion 31, the locking device 40 is provided with a first block 41, and the first block 41 can move axially along the pivot axis of the extension piece 30 is arranged in the first pivot hole 221 and the second pivot hole 311, the first block 41 is provided with a third latch 411, when the latch device 40 is switched to the latch state, the third latch The tooth 411 engages the first locking tooth 222 and the second locking tooth 312 at the same time, the extension piece 30 cannot rotate relative to the connecting piece 20, and when the locking device 40 is switched to the released state, the third locking tooth 411 engages the The first latch 222 is disengaged from the second latch 312 , and the extension member 30 can rotate relative to the connecting member 20 .

The extension piece 30 is provided with a third pivot portion 32, the first pivot portion 22 is disposed between the second pivot portion 31 and the third pivot portion 32, the third pivot portion 32 is along the A third pivot hole 321 is arranged axially on the pivot axis of the extension piece 30 and a fourth locking tooth 322 is arranged in the third pivot hole 321. The locking device 40 is provided with a second locking block 42, the second The locking block 42 is arranged in the first pivot hole 221 and the third pivot hole 321 so as to move axially along the pivot axis of the extension piece 30 , and the second locking block 42 is provided with a fifth locking tooth 421 . When the device 40 is switched to the latching state, the fifth latching tooth 421 engages the first latching tooth 222 and the fourth latching tooth 322 at the same time, and when the latching device 40 is switched to the release state, the fifth latching tooth 421 Engage the first locking tooth 222 and disengage the fourth locking tooth 322 .

The locking device 40 is provided with an elastic member 43, the elastic member 43 is disposed between the first block 41 and the second block 42, one end of the elastic member 43 is against the first block 41 and The other end abuts against the second locking block 42 , and the elastic member 43 can push the first locking block 41 and the second locking block 42 to move away from each other respectively.

The end of the first block 41 adjacent to the second block 42 is provided with a first slot 412, and the end of the second block 42 adjacent to the first block 41 is provided with a second slot 422. One end of the piece 43 is disposed in the first slot 412 and the other end abuts against the second slot 422. When the locking device 40 is switched to the release state, the second block 42 abuts against the second slot. A block 41.

The locking device 40 is provided with a first push button 44 and a second push button 45, the first push button 44 is arranged in the second pivot hole 311, and the first push button 44 leans against the first card. The block 41 is opposite to the end of the second block 42, the second push button 45 is arranged in the third pivot hole 321, and the second push button 45 leans against the second block 42 opposite to the first block. One end of block 41.

The locking device 40 is provided with a first locking member 46 and a second locking member 47, the first locking member 46 passes through the side of the first push button 44 opposite to the first block 41 The first push button 44 is connected to the first block 41 in a screw-lock manner, and the second locking member 47 passes through the second push button 45 on the side opposite to the second block 42 . The push button 45 is connected to the second block 42 in a screw-lock manner.

The locking device 40 is provided with a first buckle 48 and a second buckle 49, the first buckle 48 is disposed in the second pivot hole 311 and is located at the second latch 312 opposite to the first latch. On one side of the tooth 222, the second fastener 49 is disposed in the third pivot hole 321 and is located on the side of the fourth locking tooth 322 opposite to the first locking tooth 222, and the locking device 40 is switched to the locking tooth 222. In the locked state, the third latch 411 abuts against the first fastener 48 , and the fifth latch 421 abuts against the second fastener 49 .

The wrench connection part 21 is provided with a front face 211 along the direction parallel to the pivot axis of the extension part 30, and the wrench connection part 21 is provided with a first side 212 along the direction perpendicular to the pivot axis axis of the extension part 30 and opposite to A second side 213 of the first side 212, the wrench connecting portion 21 is provided with a first buckle arm 214 and a second buckle arm 215, the first buckle arm 214 is arranged on the front 211 and adjacent to the The first side 212, the second buckle arm 215 is disposed on the front side 211 and adjacent to the second side 213, the first buckle arm 214 is adjacent to the first pivot portion 22 from one end to the first pivot portion 22 The distance forms a first length L1, the distance from the end of the second buckle arm 215 away from the first pivotal portion 22 to the first pivotal portion 22 forms a second length L2, the second length L2 is less than the The first length L1.

The extension rod 10 can not only extend the arm of the wrench through the above structure, but also allow the user to select the driving angle. When the extension rod 10 is used, it can be connected to the wrench 90 with the wrench connecting part 21, and the extension piece 30 can be used as the arm. The output torque of the wrench 90 is improved, and the angle of the extension piece 30 can be changed, so as to prevent the extension rod 10 from being restricted by space.

With regard to the above, it can be concluded that the present invention has the following advantages:

1. It is a wrench extension rod of the present invention, wherein the extension rod includes a connecting piece and an extension piece, the connecting piece is provided with a wrench connecting portion and a first pivot portion, and the extension piece is provided with a second pivot portion , the second pivotal part is pivotally arranged on the first pivotal part, and the extension rod not only can extend the arm of the wrench through the above-mentioned structure, but also allows the user to select the driving angle.

However, the above is only a preferred embodiment of the present invention, and should not be used to limit the implementation scope of the present invention, so all changes in numerical values or replacement of equivalent elements, or equivalents made according to the patent scope of the present invention Changes and modifications should still fall within the category covered by the patent of the present invention.

10: Extension rod 20:Connector 21: Wrench connection part 211: front 212: First side 213: second side 214: The first buckle arm 215: the second buckle arm 22: The first pivot joint 221: the first pivot hole 222: The first locking tooth 30: extension 31: The second pivot joint 311: second pivot hole 312: The second locking tooth 32: The third pivot joint 321: The third pivot hole 322: The fourth tooth 40:Catch device 41: The first block 411: The third tooth 412: The first storage tank 42: The second block 421: The fifth tooth 422: second storage tank 43: Elastic parts 44: The first push button 45: The second push button 46: The first locking member 47: Second locking member 48: The first fastener 49: Second fastener 90: wrench L1: first length L2: second length

Figure 1: It is the three-dimensional appearance view of the wrench extension rod of the present invention. Fig. 2: is the three-dimensional exploded view of the wrench extension rod of the present invention. Fig. 3: It is a cross-sectional structure diagram of the wrench extension rod locking device of the present invention switched to the locking state. Figure 4: It is an action diagram of switching the locking device of the wrench extension bar of the present invention to the release state. Fig. 5: Action diagram of the pivoting of the extended part of the wrench extension rod of the present invention. Figure 6: It is a diagram of the use state of the wrench extension rod connected to the wrench of the present invention.

10: Extension rod

20:Connector

21: Wrench connection part

211: front

212: First side

213: second side

214: The first buckle arm

215: the second buckle arm

22: The first pivot joint

30: extension

31: The second pivot joint

32: The third pivot joint

40:Catch device

44: The first push button

46: The first locking member

Claims (9)

A wrench extension rod, which includes: a connecting piece, the connecting piece is provided with a wrench connecting part and a first pivot joint part; an extension piece, the extension piece is provided with a second pivot joint part, the second pivot joint part The connection part is pivotally arranged on the first pivotal part, the wrench connection part is provided with a front surface along the direction parallel to the pivot axis axis of the extension piece, and the wrench connection part is provided with a front surface along the direction perpendicular to the pivot axis axis direction of the extension piece. On the first side and a second side opposite to the first side, the wrench connection part is provided with a first snap arm and a second snap arm, the first snap arm is arranged on the front side and adjacent to the second snap arm On one side, the second fastening arm is disposed on the front side and adjacent to the second side. The wrench extension bar according to claim 1, wherein the first pivot portion is provided with a first pivot hole axially along the pivot axis of the extension piece and a first locking tooth is provided in the first pivot hole, the The second pivotal part is provided with a second pivot hole axially along the pivot axis of the extension piece and a second locking tooth is arranged in the second pivot hole. The extension rod includes a locking device, and the locking device It is connected to the first pivotal part and the second pivotal part in a switchable manner between a locking state and a releasing state. The locking device is provided with a first block, and the first block can move along the extension piece. The pivot shaft is arranged in the first pivot hole and the second pivot hole to move axially. The first block is provided with a third latch. When the latch device is switched to the latch state, the third latch The teeth engage the first locking tooth and the second locking tooth at the same time, the extension piece cannot rotate relative to the connecting piece, and when the locking device is switched to the release state, the third locking tooth engages the first locking tooth and disengages from the As for the second locking tooth, the extension piece can rotate relative to the connecting piece. The wrench extension rod as described in Claim 2, wherein the extension piece is provided with a third pivot joint, the first pivot joint is disposed between the second pivot joint and the third pivot joint, and the first pivot joint is arranged between the second pivot joint and the third pivot joint. The three pivot joints are provided with a third pivot hole axially along the pivot axis of the extension piece and a fourth pivot hole is arranged in the third pivot hole. The locking tooth, the locking device is provided with a second locking block, and the second locking block is arranged in the first pivot hole and the third pivot hole so as to be able to move axially along the pivot axis of the extension piece. The block is provided with a fifth locking tooth. When the locking device is switched to the locking state, the fifth locking tooth is engaged with the first locking tooth and the fourth locking tooth at the same time. When the locking device is switched to the releasing state , the fifth locking tooth engages with the first locking tooth and disengages from the fourth locking tooth. The wrench extension rod as described in claim 3, wherein the locking device is provided with an elastic member, the elastic member is arranged between the first block and the second block, and one end of the elastic member is against the The other end of the first block abuts against the second block, and the elastic member can push the first block and the second block to move away from each other. The wrench extension rod as described in claim 4, wherein the first block is provided with a first slot at one end adjacent to the second block, and the second block is provided with a first slot at one end adjacent to the first block Two slots, one end of the elastic member is set in the first slot and the other end is against the second slot, when the locking device is switched to the release state, the second block is against the First block. The wrench extension rod as described in claim 5, wherein the locking device is provided with a first push button and a second push button, the first push button is arranged in the second pivot hole, and the first push button is against Leaning against the end of the first block opposite to the second block, the second push button is disposed in the third pivot hole, the second push button leans against the second block opposite to the first block end of the block. The wrench extension rod as described in claim 6, wherein the locking device is provided with a first locking member and a second locking member, and the first locking member is opposed to the first locking member by the first push button One side of the block passes through the first push button and is connected to the first block in a screw-locking manner, and the second locking member passes through the second block from the side of the second push button opposite to the second block. The two push buttons are connected to the second clamping block in a screw-locking manner. The wrench extension rod as described in claim 7, wherein the locking device is provided with a first fastener and a second fastener, and the first fastener is arranged in the second pivot hole and located on the second locking tooth On the side opposite to the first latch, the second fastener is disposed in the third pivot hole and on the side of the fourth latch opposite to the first latch, and the locking device is switched to the latch In the locked state, the third latch abuts against the first fastener, and the fifth latch abuts against the second fastener. The wrench extension rod as described in claim 8, wherein the distance from the end of the first buckle arm adjacent to the first pivot joint to the first pivot joint forms a first length, and the second buckle arm is far away from the first pivot joint. A distance from one end of the first pivotal portion to the first pivotal portion forms a second length, which is smaller than the first length.

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