TW202206710A - Positioning device for telescopic rod and telescopic rod which can reduce the assembling and manufacturing costs - Google Patents

Abstract

The present invention relates to a positioning device of a telescopic rod. The telescopic rod has an inner tube and an outer tube. The outer tube has a radial through hole. The positioning device of the telescopic rod includes a positioning member and a packing member. The positioning member includes a sleeve and a fixed pivot block extending from the sleeve. The sleeve has an inner tube surface, an outer tube surface, and a through hole passing through the outer tube surface and the inner tube surface and corresponding to the radial through hole. The packing member includes a flip block, a connecting block extending from the flip block, a movable pivot block extending from the connecting block in a direction away from the flip block, pivotally connected with the fixed pivot block of the positioning member and pivotable relative to the fixed pivot block, and an engaging block extending from the connecting block in a direction away from the movable pivot block. The engaging block can move between an engaging position passing through the through hole and the radial through hole and abutting against the inner tube and a releasing position disengaging from the inner tube so that the telescopic rod is placed in a positioning state or an adjustable length state. The fixed pivot block of the positioning member has a first connecting part extending from the sleeve toward a direction away from the through hole, and a first free part bent from the first connecting part toward a direction close to the through hole. The movable pivot block of the packing member has a second connecting part extending from the connecting block in a direction away from the flip block, and a second free part bent toward the direction close to the flip block from the second connecting part. The second free part is pivotally connected with the first free part.

Description

Positioning device for telescopic rod and telescopic rod

The present invention relates to a positioning device, in particular to a positioning device for a telescopic rod.

A telescopic rod and a clamping device disclosed in US Patent No. US8,496,018B2 includes an inner tube extending along an axial direction, an outer tube set outside the inner tube and forming a telescopic rod with the inner tube, and a clamping device for locking the outer tube and the inner tube in place. The clamping device includes a sleeve set on the outer tube, a radial bolt penetrating the sleeve, an operating arm pivotable relative to the sleeve, and a shaft penetrating the operating arm along the axial direction. The arm is screwed to the pin of the radial bolt. The sleeve has a surrounding wall, a first protrusion and a second protrusion connecting the surrounding wall, and a slot formed between the first protrusion and the second protrusion. The radial bolt passes through the first protrusion and the second protrusion, and the operating arm has a cam portion for the pin to pass through and abut against the second protrusion, and a handle portion connected to the cam portion. When the handle portion is pulled, the cam portion can drive the second protrusion to move toward the first protrusion, or make the second protrusion move away from the first protrusion by the restoring force of the sleeve itself. By moving in the direction, the first protruding block and the second protruding block are relatively abutted or separated, so that the sleeve tightens or loosens the outer tube to achieve the effect that the length of the telescopic rod can be adjusted.

Although the telescopic rod can be adjusted to a preset length by the clamping device, the radial bolts and pins of the clamping device are mostly made of metal, and then assembled with the sleeve and the operating arm made of plastic. The process is complicated and the manufacturing cost is increased.

Therefore, the first object of the present invention is to provide a positioning device for a telescopic rod that has fewer components and can reduce assembly and manufacturing costs.

The second object of the present invention is to provide a telescopic rod with fewer components, which can reduce assembly and manufacturing costs.

Therefore, in the positioning device of the telescopic rod of the present invention, the telescopic rod has an inner tube and an outer tube that are sleeved with each other, and the outer tube has a radial perforation. The positioning device of the telescopic rod includes a positioning member and a pressing member. .

The positioning member includes a hollow cylindrical sleeve which is fixed on the outer tube and is in the shape of a hollow cylinder, and a fixed pivot block extending from the sleeve. an outer cylinder surface, and a through hole passing through the outer cylinder surface and the inner cylinder surface and corresponding to the radial perforation of the outer tube. The pressing piece includes a wrench block, a connecting block extending from the wrench block, a fixed pivot block extending from the connecting block in a direction away from the wrench block and pivotally connected with the positioning member and can be relative to the A movable pivot block pivoting from the fixed pivot block, and a catch block extending from the connecting block in a direction away from the movable pivot block, the catch block can pass through the through hole and the diameter relative to the inner tube It moves between a latching position that perforates and abuts the inner tube and a release position that separates from the inner tube.

Therefore, the telescopic rod of the present invention includes an inner tube, an outer tube, and a positioning device.

The outer tube is sleeved on the outside of the inner tube, and the outer tube includes an inner surface, an outer surface opposite to the inner surface, and a radial perforation passing through the outer surface and the inner surface. The positioning device includes a positioning member and a pressing member pivotally connected to the positioning member. The positioning member has a hollow cylindrical sleeve which is fixed on the outer tube and has a hollow cylindrical shape, and a sleeve extending from the sleeve. A fixed pivot block, the sleeve has an inner cylindrical surface, an outer cylindrical surface opposite to the inner cylindrical surface, and a through hole passing through the outer cylindrical surface and the inner cylindrical surface and corresponding to the radial perforation of the outer tube , the pressing piece has a pulling block, a connecting block extending from the pulling block, a connecting block extending from the connecting block in a direction away from the pulling block and pivotally connected with the fixed pivot block of the positioning member and can be opposed to each other A movable pivot block pivoted by the fixed pivot block, and a locking block extending from the connecting block in a direction away from the movable pivot block, the locking block can pass through the through hole and the through hole relative to the inner tube. The radially perforated and moved between a latching position against the inner tube and a release position disengaged from the inner tube.

The effect of the present invention is that only by the cooperation of the positioning piece and the pressing piece, the catch block can be moved relative to the inner tube between the catch position and the release position, so that the catch block can be moved between the catch position and the release position. The telescopic rod is in a positioning state or an adjustable length state. Therefore, the present invention has the effect of fewer components, which can reduce assembly and manufacturing costs.

Referring to FIG. 1 and FIG. 2 , an embodiment of the telescopic rod of the present invention includes an inner tube 2 , an outer tube 3 , and a positioning device 4 .

The inner tube 2 extends along an axial direction L, and includes an inner surface 21 , an outer surface 22 opposite to the inner surface 21 , and a plurality of protrusions 23 protruding outward from the outer surface 22 . In this embodiment, the inner tube 2 includes a plurality of bumps 23, but the bumps 23 can also be connected to change into a convex ring.

The outer tube 3 is sleeved on the outside of the inner tube 2 along the axial direction L and can move relative to the inner tube 2. The outer tube 3 includes an inner surface 31, an outer surface 32 opposite to the inner surface 31, a connection A first outer tube end surface 33 and a second outer tube end surface 34 of the inner surface 31 and the outer surface 32 , a radial hole passing through the inner surface 31 and the outer surface 32 and adjacent to the first outer tube end surface 33 35. A communication groove 36 connecting the first outer tube end surface 33 and the radial through hole 35, a tongue block 37 formed between the first outer tube end surface 33, the radial through hole 35 and the communication groove 36, and a first blocking block 38 protruding inward from the inner surface 31 .

The tongue piece 37 is bent outward along a radial direction transverse to the axial direction L (see FIG. 5 ).

The first blocking block 38 has the function of blocking the protrusion 23 of the inner tube 2 to prevent the inner tube 2 from being separated from the outer tube 3 when the inner tube 2 is pulled away from the outer tube 3 .

Referring to FIGS. 1 to 6 , the positioning device 4 includes a positioning member 40 and a pressing member 50 pivotally connected to the positioning member 40 .

The positioning member 40 has a hollow cylindrical sleeve 41 , a fixed pivot block 42 , a blocking block 43 , an accommodating groove 44 and a second blocking block 45 , which is fixed on the outer tube 3 and has a hollow cylindrical shape.

The sleeve 41 has an inner cylindrical surface 411 , an outer cylindrical surface 412 opposite to the inner cylindrical surface 411 , a first sleeve end surface 413 connecting the outer cylindrical surface 412 and the inner cylindrical surface 411 , and a second sleeve The cylinder end surface 414 and a through hole 415 extending from the first sleeve end surface 413 toward the second sleeve end surface 414 along the axial direction L and passing through the outer cylinder surface 412 and the inner cylinder surface 411 . The through hole 415 corresponds to the radial through hole 35 of the outer tube 3 and does not communicate with the second sleeve end surface 414 , so as to maintain the overall structural strength of the sleeve 41 .

The fixed pivot block 42 has a first connecting portion 421 extending from the outer cylindrical surface 411 of the sleeve 41 in a direction away from the through hole 415 , and a first connecting portion 421 bent in a direction close to the through hole 415 . A folded and coiled first free portion 422, an open end 423 located at one end of the first connecting portion 421 and the first free portion 422 and adjacent to the first sleeve end surface 413, and an open end 423 located at the first end surface 413 of the first sleeve. A connecting portion 421 is connected to the other end of the first free portion 422 and is opposite to the closed end 424 of the open end 423 .

The blocking block 43 is disposed between the first sleeve end surface 413 of the sleeve 41 and the inner cylindrical surface 412 along the axial direction L and extends into the through hole 415 .

The accommodating groove 44 of the positioning member 40 is disposed on the block 43 along the axial direction L and communicates with the through hole 415 , and the accommodating groove 44 is used for inserting the tongue block 37 bent outward, so that the tongue block 37 can be inserted into the block 43 . It is blocked by the block 43 and will not touch the inner tube 2 , and thus will not interfere with the movement of the inner tube 2 .

The second blocking block 45 is disposed on the inner cylinder surface 411 and connected to the blocking block 43 . The second blocking block 45 is capable of blocking the inner pipe 2 when the inner pipe 2 is pulled away from the outer pipe 3 . The protrusion 23 is used to prevent the inner tube 2 from being separated from the outer tube 3. The second blocking block 45 and the first blocking block 38 jointly block the protrusion 23, which can prevent the inner tube 2 from detaching. The effect of the outer tube 3 is better.

The pressing member 50 has an arc-shaped pulling block 51 that can approach the sleeve 41 , a connecting block 52 extending from the pulling block 51 , and a connecting block 52 facing away from the pulling block 51 . A movable pivot block 53 that extends in the direction of the positioning member 40 and is pivotally connected with the fixed pivot block 42 of the positioning member 40 and can be pivoted relative to the fixed pivot block 42, and a movable pivot block 53 extending from the connecting block 52 in a direction away from the movable pivot block 53 and The latching block 54 can extend into the radial hole 35 .

The movable pivot block 53 of the pressing member 50 has a second connecting portion 531 extending from the connecting block 52 in a direction away from the toggle block 51 , and a second connecting portion 531 toward the toggle block 51 It is bent in the direction of the coil and pivoted to the second free portion 532 of the first free portion 422 .

Referring to FIGS. 1 and 5 , the tongue block 37 is bent outward along the radial direction to prevent the positioning member 40 and the pressing member 50 from being separated from the outer tube 3 along the axial direction L.

Referring to FIGS. 2 and 9 , the movable pivot block 53 of the pressing member 50 enters the fixed pivot block 42 from the open end 423 of the fixed pivot block 42 along the axial direction L, so that the second free portion 532 is connected to the first free portion 532 . The free portion 422 is pivotally connected, while the connecting block 52, the second connecting portion 531 and the locking block 54 are located in the through hole 415 of the sleeve 41 and the radial through hole 35 of the outer tube 3, and the second connection The portion 531 and the latching block 54 are blocked by the tongue block 37 and the blocking block 43, and the pressing member 50 is blocked by the tongue block 37, the blocking block 43 and the closed end 424 along the axial direction L, namely The pressing member 50 can be prevented from being separated from the positioning member 40 .

Referring to FIGS. 5 to 8 , by pulling the pulling block 51 , the movable pivot block 53 can be rotated relative to the fixed pivot block 42 , so that the latching block 54 is in a latching position relative to the inner tube 2 and a release position. In the release position, the pulling block 51 is far away from the sleeve 41, and the locking block 54 is separated from the inner tube 2. At this time, the inner tube 2 and the outer tube 3 can move relative to each other, so that the telescopic rod is in a position In the adjustable length state, when the inner tube 2 and the outer tube 3 are adjusted to the required positions, that is, after the telescopic rod is adjusted to the required length, the pulling block 51 is oriented toward the position close to the sleeve 41 . When the direction is moved, the latching block 54 can be moved to the latching position. At the latching position, the latching block 54 passes through the through hole 415 and the radial through hole 35 and abuts against the inner tube 2 . The inner tube 2 cannot move relative to the outer tube 3, and the telescopic rod is in a fixed position. If the pulling block 51 is pulled again to move away from the sleeve 41, the locking block 54 can be moved from The latching position moves to the releasing position.

Referring to FIGS. 1 , 2 and 5 , since the outer tube 3 is provided with the radial perforation 35 at a position adjacent to the first outer tube end surface 33 , the length of the tongue block 37 along the axial direction L is limited, which may lead to The strength of the tongue piece 37 is insufficient. Therefore, after the positioning device 4 is assembled to the outer tube 3, the tongue piece 37 of the outer tube 3 tends to retract inwardly and touch the inner tube 2 to interfere with the movement of the inner tube 2. In the present invention, the accommodating groove 44 is provided on the stopper 43 of the positioning member 40 for the tongue piece 37 to be inserted, and the tongue piece 37 is blocked by the stopper 43 , so that the tongue piece 37 can be prevented from retracting and shifting inward. Touching the inner tube 2 will not interfere with the movement of the inner tube 2 .

The positioning device 4 of the present invention can be manufactured and sold separately, and can be used with different telescopic rods.

To sum up, the positioning device of the telescopic rod and the telescopic rod of the present invention are sleeved and fixed to the outer tube 3 by the positioning member 40 , and the locking block 51 is rotated by rotating the pulling block 51 of the pressing member 50 . The block 54 moves relative to the inner tube 2 between the latched position and the release position to achieve the effect of making the telescopic rod in the positioning state or the adjustable length state. Compared with the existing clamping device, four components are required. In cooperation with each other, the present invention only needs to set the positioning piece 40 and the pressing piece 50, and both the positioning piece 40 and the pressing piece 50 can be made of plastic. Compared with the previous case, there are fewer components, which can reduce assembly. and manufacturing cost, and can effectively improve yield and durability.

However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

2: Inner tube 21: inner surface 22: outer surface 23: Bumps 3: Outer tube 31: inner surface 32: outer surface 33: End face of the first outer tube 34: Second outer tube end face 35: Radial perforation 36: Connecting slot 37: Tongue Block 38: First stop block 4: Positioning device 40: Positioning pieces 41: Sleeve 411: Inner cylinder surface 412: outer cylinder surface 413: First sleeve end face 414: Second sleeve end face 415: Through hole 42: Fixed pivot block 421: The first connection part 422: First Liberty Ministry 423: Open End 424: closed end 43: Stop 44: accommodating slot 45: Second stop block 50: Pressing pieces 51: Flip the block 52: Connection block 53: Active Pivot Block 531: Second connector 532: Second Liberty Ministry 54: Card block L: Axial

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Fig. 1 is a three-dimensional combined view of an embodiment of a telescopic rod of the present invention; Fig. 2 is a perspective exploded view of this embodiment; 3 is a perspective view of a positioning member of the embodiment; 4 is another perspective view of the positioning member of this embodiment; 5 is a cross-sectional view taken along line V-V of FIG. 1, illustrating a latching block in a latching position; Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 1, illustrating the latching block at the latching position; FIG. 7 is a sectional view similar to FIG. 5 , illustrating the latching block in a release position; Fig. 8 is a sectional view similar to Fig. 6, illustrating the catch block in the release position; and FIG. 9 is a partial perspective combined view of the embodiment, showing the combined state of an outer tube and a positioning device.

2: Inner tube

21: inner surface

22: outer surface

23: Bumps

3: Outer tube

31: inner surface

32: outer surface

33: End face of the first outer tube

34: Second outer tube end face

35: Radial perforation

36: Connecting slot

37: Tongue Block

38: First stop block

4: Positioning device

40: Positioning pieces

41: Sleeve

411: Inner cylinder surface

412: outer cylinder surface

413: First sleeve end face

414: Second sleeve end face

415: Through hole

42: Fixed pivot block

421: The first connection part

422: First Liberty Ministry

423: Open End

424: closed end

43: Stop

44: accommodating slot

50: Pressing pieces

51: Flip the block

52: Connection block

53: Active Pivot Block

531: Second connector

532: Second Liberty Ministry

54: Card block

L: Axial

Claims (10)

A positioning device for a telescopic rod, the telescopic rod has an inner tube and an outer tube that are sleeved with each other, the outer tube has a radial perforation, and the positioning device for the telescopic rod comprises: A positioning member includes a hollow cylindrical sleeve that is fixed on the outer tube and has a hollow cylindrical shape, and a fixed pivot block extending from the sleeve. The sleeve has an inner cylindrical surface and an opposite to the inner cylindrical surface. The outer cylindrical surface, and a through hole passing through the outer cylindrical surface and the inner cylindrical surface and corresponding to the radial perforation of the outer tube; and A pressing piece includes a pulling block, a connecting block extending from the pulling block, a fixed pivot block extending from the connecting block in a direction away from the pulling block and pivotally connected with the positioning member and can be relative to the A movable pivot block pivoting from the fixed pivot block, and a catch block extending from the connecting block in a direction away from the movable pivot block, the catch block can pass through the through hole and the diameter relative to the inner tube It moves between a latching position that perforates and abuts the inner tube and a release position that separates from the inner tube. The positioning device for a telescopic rod according to claim 1, wherein the fixed pivot block of the positioning member has a first connecting portion extending from the sleeve in a direction away from the through hole, and a first connecting portion extending from the first connecting portion. The first free portion is bent toward the direction close to the through hole, the movable pivot block of the pressing member has a second connecting portion extending from the connecting block toward the direction away from the pulling block, and a second connecting portion extending from the second connecting block. The connecting portion is bent toward the second free portion in a direction close to the toggle block, and the second free portion is pivotally connected with the first free portion. The positioning device for a telescopic rod according to claim 1, wherein the sleeve of the positioning member further comprises a first sleeve end surface and a second sleeve end surface connecting the outer cylindrical surface and the inner cylindrical surface, the communication The hole communicates with the end face of the first sleeve and does not communicate with the end face of the second sleeve. A telescopic pole comprising: an inner tube; an outer tube sleeved on the outside of the inner tube, the outer tube includes an inner surface, an outer surface opposite to the inner surface, and a radial hole penetrating the outer surface and the inner surface; and A positioning device includes a positioning member and a pressing member pivotally connected to the positioning member. The positioning member has a hollow cylindrical sleeve which is fixed to the outer tube and extends from the sleeve. The fixed pivot block, the sleeve has an inner cylindrical surface, an outer cylindrical surface opposite to the inner cylindrical surface, and a through hole passing through the outer cylindrical surface and the inner cylindrical surface and corresponding to the radial perforation of the outer tube a hole, the pressing piece has a wrench block, a connection block extending from the wrench block, a fixed pivot block extending from the connection block in a direction away from the wrench block and pivotally connected with the positioning member and can be A movable pivot block pivoting relative to the fixed pivot block, and a catch block extending from the connecting block in a direction away from the movable pivot block, the catch block can be connected to a through hole relative to the inner tube through the through hole. The radially perforated and moved between a latching position against the inner tube and a release position disengaged from the inner tube. The telescopic rod of claim 4, wherein the outer tube further comprises a first outer tube end surface and a second outer tube end surface connecting the inner surface and the outer surface, and a first outer tube end surface and the outer tube end surface connecting the inner surface and the outer surface. A communication groove with radial perforation, and a tongue block formed between the end surface of the first outer tube and the radial perforation and the communication groove, the sleeve also has a first connection between the outer cylindrical surface and the inner cylindrical surface. A sleeve end surface and a second sleeve end surface, the through hole communicates with the first sleeve end surface, and the positioning member also has a sleeve disposed between the first sleeve end surface and the inner surface of the sleeve and protrudes into the sleeve. A block of the through hole, and an accommodating groove provided on the block for the tongue block to be inserted into. The telescopic rod of claim 5, wherein the fixed pivot block of the positioning member has an open end located at one end of the first connecting portion and the first free portion and adjacent to the end face of the first sleeve, and an open end A closed end located at the other end of the first connecting portion and the first free portion and opposite to the open end. The telescopic rod as claimed in claim 6, wherein the inner tube further includes a convex block protruding outward, and the outer pipe further includes a first contact block protruding inward from the inner surface and capable of blocking the convex block. stop block. The telescopic rod according to claim 7, wherein the positioning member further has a second blocking block disposed on the inner cylinder surface and connected to the blocking block and capable of blocking the protruding block. The telescopic rod as claimed in claim 4, wherein the fixed pivot block of the positioning member has a first connecting portion extending from the sleeve in a direction away from the through hole, and a first connecting portion extending from the first connecting portion toward the The first free portion is bent in the direction of the through hole, the movable pivot block of the pressing member has a second connecting portion extending from the connecting block toward the direction away from the pulling block, and a second connecting portion extending from the second connecting portion toward the A second free portion bent in a direction close to the pulling block, the second free portion is pivotally connected with the first free portion. The telescopic rod according to claim 9, wherein the first free portion is in a coil shape, and the second free portion is in a coil shape.

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