TWI730874B - Quick-release tool connecting rod - Google Patents

Abstract

A quick-release tool connecting rod is provided, including a main member, a sleeve and at least one locking mechanism. The sleeve is movably disposed on the main member. The at least one locking mechanism has an inclined plane, an oblong hole and a locking ball. The inclined plane is disposed on the sleeve. The oblong hole is disposed on the main member. The locking ball is disposed in the oblong hole.

Description

Quick release tool extension

The present invention relates to hand tools, and particularly relates to a quick-release tool extension rod.

People often use screwdrivers to lock or disassemble objects. Sometimes the force of the hand alone is not enough to drive the screw to rotate, or when there are too many screws to be rotated, then it is necessary to switch to a power rotating tool with a tool extension or screwdriver. Use the head together to reduce the burden on the constructor and speed up the overall construction speed.

However, most of the existing tool extensions on the market only cooperate with the screwdriver heads produced by ourselves. In other words, the specifications of the tool extensions and the screwdriver heads must be matched with each other. The general tool extensions cannot be assembled with various specifications of screwdriver heads. The tool extension also cannot release the screwdriver head quickly, resulting in unsmooth construction and time-consuming. Therefore, it is necessary to provide a novel and progressive quick-release tool extension to solve the above-mentioned problems.

The main purpose of the present invention is to provide a quick-release tool extension rod, which can be widely assembled with various screwdriver heads, and has a quick-release function that is easy to operate.

To achieve the above objective, the present invention provides a quick-release tool extension rod, which includes: a main body member, a jacket, and at least one locking mechanism. The main body member includes a post and a working sleeve connected to each other. The post is for assembling and connecting to a power tool. The working sleeve includes a communicating inner space and a plug-in interface. The plug-in interface is provided with a power tool. The driving member is inserted into the inner space; the outer sleeve is movably sleeved on the working sleeve, and includes an inner wall surface and an outer wall surface, the inner wall surface faces the main body member, and the outer wall surface faces away from the main body member; each The locking mechanism includes an inclined guide surface, an elongated hole and a locking bead. The elongated hole penetrates the working sleeve. The elongated hole defines an opening direction and an extension direction perpendicular to each other. The inclined guide The surface is recessed on the inner wall surface and faces the elongated hole. The inclined guide surface and the working sleeve jointly define a first chamber. The first chamber communicates with the internal space through the elongated hole. A chamber defines a tight end and a loose end in the extending direction, the inclined guide surface is gradually away from the working sleeve from the tight end to the loose end, and the locking bead can move along the extending direction And it can move along the direction of the opening and is limited to the elongated hole.

The following examples are only used to illustrate the possible implementation aspects of the present invention, but they are not intended to limit the scope of protection of the present invention, and are described first.

Please refer to FIGS. 1 to 10, which show a preferred embodiment of the present invention. The quick-release tool extension of the present invention includes: a main body member 1, an outer casing 2 and at least one locking mechanism 3.

Specifically, the main body member 1 includes a post 11 and a working sleeve 12 connected to each other. The post 11 is for assembling and connecting to a power tool 6, and the working sleeve 12 includes a communicating inner space. 13 and an insertion interface 14 for inserting and extending a driving element 7A (such as a screwdriver head) into the internal space 13. The jacket 2 is movably sleeved on the working sleeve 12. The jacket 2 includes an inner wall surface 21 and an outer wall surface 22. The inner wall surface 21 faces the main body member 1 and the outer wall surface 22 faces away from the main body member 1.

More specifically, the number of the at least one locking mechanism 3 is two, and each of the locking mechanisms 3 includes an inclined guide surface 31, an elongated hole 32, and a locking bead 33, and the elongated hole 32 penetrates the working sleeve. In the barrel 12, the elongated hole 32 defines an opening direction 321 and an extension direction 322 perpendicular to each other. The inclined guide surface 31 is recessed on the inner wall surface 21 and faces the elongated hole 32. The inclined guide surface 31 and the The working sleeve 12 jointly defines a first chamber 34, the first chamber 34 communicates with the internal space 13 through the elongated hole 32, and the first chamber 34 defines a pressing end in the extending direction 322 341 and a loose end 342. The inclined guide surface 31 gradually moves away from the working sleeve 12 from the tightening end 341 toward the loose end 342. The locking ball 33 can move along the extending direction 322 and can move along the opening The direction of movement 321 is limited to the elongated hole 32.

When the jacket 2 moves from a release position to a lock position, the pressing end 341 approaches the locking bead 33, and the space margin of the first chamber 34 in the opening direction 321 is reduced, and the inclined guide surface The part 31 that opposes the locking bead 33 extends into the internal space 13, wherein the design of the inclined guide surface 31 can produce the function of stepless and continuous pushing against the locking bead 33 in the opening direction 321, so that the locking bead 33 can have different depths that extend into the internal space 13 to widely locate the drive elements 7A of different sizes, or other drive elements 7B, 7C, 7D, 7E, and 7F in different configurations as shown in FIG. 9; In other words, the first chamber 34 can provide continuous and different space margins to accommodate the portion of the locking bead 33.

For example, as shown in FIG. 9, when the outer surfaces of the driving members 7A, 7C, and 7E are flat, the inclined guide surface 31 allows the locking bead 33 to only slightly extend into the inner space 13, and the locking bead 33 The driving members 7A, 7C, and 7E are locked by clamping; or, when the driving members 7B, 7D, and 7F as shown in FIG. 9 have grooves or necking sections, the inclined guide surface 31 can be further The locking ball 33 is pushed against and extends into the grooves or necked sections of the driving parts 7B, 7D, 7F to interfere with the movement of the driving parts 7B, 7D, and 7F to achieve the purpose of locking.

Conversely, when the outer casing 2 moves from the locking position to the releasing position, the loose end 342 approaches the locking bead 33. At this time, the space margin of the first chamber 34 in the opening direction 321 increases, and the locking The part of the bead 33 can gradually protrude into the first chamber 34 and retreat from the inner space 13. Wherein, a first elastic member 41 is connected between the outer casing 2 and the working sleeve 12, and the first elastic member 41 is used to drive the outer casing 2 to have a tendency to move toward the locked position normally, so as to ensure the oblique guide The surface 31 can continuously and stably press the locking bead 33 to ensure that when the driving member 7A is inserted into the working sleeve 12, the outer casing 2 can be stably maintained in the locked position to maintain safety in use.

It is worth mentioning that the locking bead 33 can slide into the elongated hole 32 along the extending direction 322, so that the locking bead 33 can be arbitrarily pressed against different surface positions of the driving member 7A, so that when there is When there is an error in the size of the driving member 7A or the size of the working sleeve 12, the locking ball 33 can still position the driving member 7A. Moreover, when the driving member 7A is inserted into the inner space 13, the locking bead 33 can be pushed by the driving member 7A and move toward the loose end 342, which can effectively lower the driving member 7A during the insertion process. Resistance in the middle. Specifically, the cooperation between the elongated hole 32 and the inclined guide surface 31 can allow the various driving members 7A, 7B, 7C, 7D, 7E, and 7F as shown in FIG. Has excellent mating smoothness.

Preferably, in the extending direction 322, the length of the inclined guide surface 31 is greater than the length of the elongated hole 32, so as to provide the first chamber 34 with a variety of space margins. After many actual tests, in the extending direction 322, when the ratio of the length of the elongated hole 32 to the length of the inclined guide surface 31 is between 0.2 and 0.4, a suitable range can be used.

Preferably, after repeated tests, when the included angle between the inclined guide surface 31 and the extending direction 322 is between 3 degrees and 8 degrees, the locking bead 33 can be used to position different patterns widely. The driving parts 7A, 7B, 7C, 7D, 7E, 7F.

Preferably, an adjusting groove 15 is recessed in the working sleeve 12, and the adjusting groove 15 is transversely connected to an adjusting end 323 of the elongated hole 32, and the adjusting end 323 is closer to the relaxing end 342, such a In the future, the effect of adjusting the length of the elongated hole 32 or forcing the locking bead 33 to lock the driving member 7A more reliably can be provided. For example, but not limited to, insert a fastener into the adjusting groove 15, and a part of the fastener will pass through the adjusting end 323 of the elongated hole 32. At this time, the length of the elongated hole 32 is shortened, that is, the locking bead 33 The amount of displacement is shortened, so that the driving member 7A will not easily loosen; or, one end of the elastic member springs against the wall of the adjusting groove 15 and the other end of the elastic member springs against the locking bead 33 to give The locking bead 33 has a tendency to move toward the pressing end 341 to improve the firmness of locking the driving member 7A.

More specifically, the outer casing 2 and the working sleeve 12 jointly define a second chamber 35. A protruding member 36 is positioned on the working sleeve 12 and in the second chamber 35. The protruding member 36 extends the second chamber 35. The two chambers 35 are divided into a first area 351 and a second area 352. The first elastic member 41 is accommodated in the first area 351 and is connected to the protruding member 36 and the outer jacket 2 respectively. A second elastic member 42 is accommodated in the second area 352 and connected to the protruding member 36 and the outer casing 2 respectively. The second elastic member 42 is used to force the outer casing 2 to move toward the release position; Wherein, the elastic force of the first elastic element 41 is greater than the elastic force of the second elastic element 42.

Furthermore, the first elastic member 41 provides a locking force to the outer casing 2, and the second elastic member 42 provides a releasing force to the outer casing 2. The locking force can be finely adjusted through the second elastic member 42 to ensure that the In the case of stable locking, the user can easily push the jacket 2 to the release position. Among them, this mechanism can effectively solve the real life environment, when it is not easy to find an appropriate elastic force for the jacket 2 to lock (locking force), it can be adjusted in this way to effectively match the suitable locking force.

In this embodiment, the protruding member 36 is an E buckle, and the protruding member 36 is positioned on the working sleeve 12 by embedding. Moreover, the outer jacket 2 includes a body 23 and a plug 24. The inclined guide surface 31 is recessed on a head end 231 of the body 23. In the radial direction of the working sleeve 12, a tail end 232 of the body 23 is formed Open and spaced apart from the working sleeve 12, the plug 24 is disposed on the body 23 to close the opening of the tail end 232, and the first elastic member 41 springs against the protruding member 36 and the plug 24 In between, the second elastic member 42 elastically abuts between the protruding member 36 and the main body 23.

The outer casing 2 can move along the axial direction of the working sleeve 12, the extending direction 322 of the elongated hole 32 is the axial direction of the working sleeve 12, and the opening direction 321 of the elongated hole 32 is the working sleeve In the radial direction of the barrel 12, the tightening end 341 is closer to the insertion port 14 than the loose end 342. The user only needs to actuate the outer casing 2 to move in the direction of the insertion port 14 to release it, which is quite convenient.

Preferably, the outer wall 22 of the jacket 2 is provided with a non-slip structure 25 which can be pressed by the hand and can be actuated more stably and quickly.

The quick-release tool extension rod further includes a magnetic assembly 5, the magnetic assembly 5 is accommodated in the internal space 13, and the magnetic assembly 5 includes a base 51, a magnet 52, and a third elastic member 53. The third elastic member 53 is respectively connected to the main body member 1 and the base body 51. The magnet 52 is accommodated in the base body 51 for magnetically attracting the driving member 7A, so as to additionally increase the stability of the driving member 7A. Moreover, when the outer casing 2 moves to the release position, the magnet 52 can magnetically attract the driving member 7A to prevent the driving member 7A from directly falling to the ground.

In this embodiment, the working sleeve 12 further includes a first step portion 16, the first step portion 16 protrudes from the inner space 13, the seat body 51 is cylindrical, and the seat body 51 includes a small The small-diameter section 511 and the large-diameter section 512 are connected to the large-diameter section 512 to form a second step portion 513. The second step portion 513 faces the insertion port 14 and can be selectively connected to the The first step portion 16 abuts to limit the position of the magnet 52 to prevent it from falling out of the socket 14.

Of course, according to requirements, a quick-release tool extension as shown in another embodiment of FIG. 11 can also be used. The difference from this embodiment is only that the inner space 13A of the working sleeve 12A does not contain the magnetic In addition, the internal space 13A can provide more margin for insertion.

To be supplemented, please refer to the main body member 1 in Figures 1 to 10, which is formed by combining two separate members (the post 11 and the working sleeve 12), but it is understandable that it is not limited In this state. Please refer to the quick-release tool extension rod of another embodiment in FIG. 12. The extension rod 11B and the working sleeve 12B are integrally formed, so that the main body member 1B has better structural strength and stability.

1,1B: main component 11, 11B: Post 12, 12A, 12B: working sleeve 13,13A: Internal space 14: plug interface 15: adjustment slot 16: first stage 2: coat 21: inner wall surface 22: Outer wall 23: body 231: Headend 232: End 24: plug 25: non-slip structure 3: Locking mechanism 31: Inclined guide surface 32: Long strip hole 321: Opening direction 322: Extension direction 323: adjust end 33: Locking Bead 34: The first chamber 341: The Urgent End 342: Relax 35: second chamber 351: District One 352: The Second District 36: convex 41: The first elastic part 42: second elastic part 5: Magnetic components 51: Block 511: Trail section 512: Large diameter section 513: Second Stage 52: Magnet 53: The third elastic part 6: Power tools 7A, 7B, 7C, 7D, 7E, 7F: drive parts

Fig. 1 is a perspective view of an embodiment of the present invention. Figure 2 is an exploded view of Figure 1. Fig. 3 is a partial cross-sectional view of Fig. 1. Fig. 4 is a cross-sectional view of Fig. 1. 5 and 6 are diagrams of the plug-in operation of the driving head according to an embodiment of the present invention. Fig. 7 is a schematic diagram of a release drive head according to an embodiment of the present invention. Fig. 8 is a partial enlarged view of Fig. 4. Fig. 9 is a schematic diagram of assembling various driving heads according to an embodiment of the present invention. Fig. 10 is a schematic diagram of the operation of an embodiment of the present invention. Figure 11 is a cross-sectional view of another embodiment of the present invention. Figure 12 is a cross-sectional view of another embodiment of the present invention.

1: main component

13: Internal space

3: Locking mechanism

5: Magnetic components

7A, 7B, 7C, 7D, 7E, 7F: drive parts

Claims (10)

A quick-release tool extension rod, including: A main body member includes a post and a working sleeve connected to each other. The post is for assembling a power tool. The working sleeve includes an internal space that communicates with each other and a plug-in interface. The plug-in interface is used for connecting to a power tool. A driving part is inserted into the internal space; A jacket movably sleeved on the working sleeve, comprising an inner wall surface and an outer wall surface, the inner wall surface faces the main body member, and the outer wall surface faces away from the main body member; and At least one locking mechanism, each of the locking mechanisms includes an inclined guide surface, an elongated hole and a locking bead. The elongated hole penetrates the working sleeve, and the elongated hole defines an opening direction perpendicular to each other and a In the extending direction, the inclined guide surface is recessed on the inner wall surface and faces the elongated hole, the inclined guide surface and the working sleeve jointly define a first chamber, and the first chamber is communicated through the elongated hole The inner space and the first chamber define a tight end and a loose end in the extending direction. The inclined guide surface gradually moves away from the working sleeve from the tight end toward the loose end, and the locking bead is It is confined to the elongated hole so as to be movable along the extending direction and movable along the opening direction. The quick-release tool extension of claim 1, wherein when the jacket moves from a release position to a locked position, the pressing end approaches the locking bead, and the inclined guide surface opposes the partial extension of the locking bead Into the internal space, and when the outer jacket moves from the locking position to the releasing position, the relaxed end approaches the locking bead, and the part of the locking bead can gradually protrude into the first chamber and retreat from the internal space; Wherein, a first elastic element is connected between the outer sleeve and the working sleeve, and the first elastic element is used for driving the outer sleeve to normally move toward the locked position. The quick-release tool extension of claim 2, wherein the outer casing and the working sleeve jointly define a second chamber, a protruding member is positioned on the working sleeve and in the second chamber, and the protruding member The second chamber is divided into a first area and a second area. The first elastic member is accommodated in the first area and connected to the protruding member and the outer jacket, respectively, and a second elastic member is accommodated in the The second area is respectively connected to the protruding piece and the outer sleeve, and the second elastic element is used to force the outer sleeve to move toward the release position; wherein, the elastic force of the first elastic element is greater than that of the second elastic element Elasticity. The quick-release tool extension rod according to claim 1, further comprising a magnetic assembly, the magnetic assembly is accommodated in the internal space, and the magnetic assembly includes a base, a magnet, and a third elastic member, The third elastic member is respectively connected to the main body member and the base body, and the magnet is accommodated in the base body for magnetically attracting the driving member. The quick-release tool extension according to claim 1, wherein an adjustment groove is recessed in the working sleeve, and the adjustment groove is transversely connected with an adjustment end of the elongated hole, and the adjustment end is closer to the relaxation end. The quick-release tool extension according to claim 1, wherein the outer wall of the jacket is provided with a non-slip structure, and the non-slip structure can be pressed by the hand. The quick-release tool extension according to any one of claims 1 to 6, wherein the outer sleeve can move along the axial direction of the working sleeve, and the extending direction of the elongated hole is the axial direction of the working sleeve The opening direction of the elongated hole is the radial direction of the working sleeve, and the pressing end is closer to the insertion port than the loose end. The quick-release tool extension according to claim 7, wherein in the extending direction, the length of the inclined guide surface is greater than the length of the elongated hole. The quick-release tool extension according to claim 7, wherein the angle between the inclined guide surface and the extending direction is between 3 degrees and 8 degrees. The quick-release tool extension rod according to claim 3, further comprising a magnetic assembly, the magnetic assembly is accommodated in the internal space, and the magnetic assembly includes a base, a magnet, and a third elastic member, The third elastic member is respectively connected to the main body member and the seat body, the magnet is accommodated in the seat body for magnetically attracting the driving member; an adjustment groove is recessed in the working sleeve, and the adjustment groove is transversely connected to the long One of the adjustment ends of the strip hole, the adjustment end is closer to the relaxation end; the outer wall of the jacket is provided with a non-slip structure, the non-slip structure can be pressed by the hand; the jacket can move along the axial direction of the working sleeve, the long strip The extending direction of the hole is the axial direction of the working sleeve, the opening direction of the elongated hole is the radial direction of the working sleeve, and the tightening end is closer to the insertion port than the loose end; in the extending direction, The length of the inclined guide surface is greater than the length of the elongated hole; the angle between the inclined guide surface and the extending direction is between 3 degrees to 8 degrees; in the extending direction, the length of the elongated hole is equal to The ratio of the length of the inclined guide surface is between 0.2 and 0.4; the number of the at least one locking mechanism is two; the working sleeve further includes a first step, and the first step protrudes from the inner space, The seat body is cylindrical, the seat body includes a small-diameter section and a large-diameter section, the small-diameter section is connected with the large-diameter section to form a second step, and the second step faces the insertion port And can selectively abut against the first step; the protruding piece is an E buckle, and the protruding piece is positioned on the working sleeve by embedding; the outer jacket includes a body and a plug, the oblique guide The surface is recessed on a head end of the main body, in the radial direction of the working sleeve, a tail end of the main body is open and arranged spaced apart from the working sleeve, and the plug is arranged to close the opening of the tail end. In the main body, the first elastic member elastically abuts between the protruding member and the plug member, and the second elastic member elastically abuts between the protruding member and the main body.

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