TWI730865B - Positioning device for telescopic rod and telescopic rod - Google Patents

Abstract

A positioning device of a telescopic rod. The telescopic rod has an inner tube and an outer tube. 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 sleeve and a fixed pivot block extending from the sleeve. The sleeve has an inner cylindrical surface, an outer cylindrical surface, and a penetrating through the outer cylindrical surface and the inner cylindrical surface and corresponding to the diameter. To the perforated through hole. The urging member includes a turning block, a connecting block extending from the turning block, and a connecting block extending from the connecting block in a direction away from the turning block and pivotally connected to the fixed pivot block of the positioning member and capable of being opposed to the fixed pivot block of the positioning member. A movable pivot block pivoted by a 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 radial perforation and abut against The movement between the locking position of the inner tube and a loosening position detached from the inner tube makes the telescopic rod in a positioning state or an adjustable length state.

Description

Positioning device for telescopic rod and telescopic rod

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

A telescopic rod and clamping device disclosed in US Patent No. US8,496,018B2 includes an inner tube extending in an axial direction, and an outer tube set outside the inner tube and forming a telescopic rod with the inner tube. And a clamping device for locking and fixing the outer tube and the inner tube. 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 an operating arm penetrating the operating arm along the axial direction. The arm is screwed on the bolt 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 penetrates the first protrusion and the second protrusion, and the operating arm has a cam portion for the insertion pin to penetrate 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 the second protrusion can be moved away from the first protrusion by the restoring force of the sleeve itself. Direction movement, so that the first protrusion and the second protrusion are relatively abutted or separated, so that the sleeve tightens or loosens the outer tube, so that the extension can be adjusted. The effect of reducing the length of the rod.

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 and 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 sleeved with each other, the outer tube has a radial perforation, and the positioning device of the telescopic rod includes a positioning member and a pressing member .

The positioning member includes a hollow cylindrical sleeve fixed to the outer tube, and a fixed pivot block extending from the sleeve. The sleeve has an inner cylindrical surface and an inner cylindrical surface opposite to the inner cylindrical surface. An outer cylinder surface, and a through hole penetrating the outer cylinder surface and the inner cylinder surface and corresponding to the radial perforation of the outer tube. The urging member includes a turning block, a connecting block extending from the turning block, and a connecting block extending from the connecting block in a direction away from the turning block and pivotally connected to the fixed pivot block of the positioning member and capable of being opposed to the fixed pivot block of the positioning member. The movable pivot block pivoted by the fixed pivot block, and a catch block extending from the connecting block toward the direction away from the movable pivot block, the catch block can be in phase The inner tube is moved between a latching position that passes through the through hole and the radial perforation and abuts against the inner tube and a loosening position that is separated 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 outer side of the inner tube, and the outer tube includes an inner surface, an outer surface opposite to the inner surface, and a radial perforation penetrating 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 fixed to the outer tube, and a sleeve extending from the sleeve Fixed pivot block, the sleeve has an inner cylindrical surface, an outer cylindrical surface opposite to the inner cylindrical surface, and a through hole penetrating the outer cylindrical surface and the inner cylindrical surface and corresponding to the radial perforation of the outer tube The urging member has a flip block, a connecting block extending from the flipping block, and a connecting block extending from the connecting block in a direction away from the flipping block and pivotally connected to the fixed pivot block of the positioning member and can be opposed to each other The movable pivot block pivoted by 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 through hole opposite to the inner tube. The radial perforation moves between a latching position of the inner tube and a release position that is detached from the inner tube.

The effect of the present invention is that only by the cooperation of the positioning member and the pressing member, the locking block can move between the locking position and the releasing position relative to the inner tube, so as to achieve the The telescopic rod is in a positioning state or an adjustable length state. Therefore, the present invention has the effects of fewer components and can reduce assembly and manufacturing costs.

2: inner tube

21: inner surface

22: Outer surface

23: bump

3: Outer tube

31: inner surface

32: Outer surface

33: The end of the first outer tube

34: The end of the second outer tube

35: Radial perforation

36: Connecting groove

37: Tongue block

38: The first stop block

4: positioning device

40: positioning parts

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: first connection part

422: First Freedom

423: open end

424: closed end

43: stop

44: accommodating slot

45: second stop block

50: Compression

51: Pull the block

52: connection block

53: Activity pivot block

531: second connection part

532: Second Freedom

54: Snap Block

L: axial

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a three-dimensional assembly view of an embodiment of the telescopic rod of the present invention; FIG. 2 is a three-dimensional view of the embodiment Exploded view; Figure 3 is a perspective view of a positioning member of this embodiment; Figure 4 is another perspective view of the positioning member of this embodiment; Figure 5 is a cross-sectional view taken along the line VV of Figure 1, illustrating a card The detent is in a detent position; Figure 6 is a cross-sectional view taken along line VI-VI of FIG. 1 to illustrate that the detent is in the detent position; Figure 7 is a cross-sectional view similar to that of FIG. 5, illustrating the detent Fig. 8 is a cross-sectional view similar to Fig. 6, illustrating that the detent block is in the disengagement position; and Fig. 9 is a partial three-dimensional assembly view of the embodiment, showing an outer tube and a positioning The combination status of the device.

Referring to FIGS. 1 and 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 form 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, and 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 through hole penetrating the inner surface 31 and the outer surface 32 and adjacent to the first outer tube end surface 33 35. A connecting groove 36 connecting the first outer tube end surface 33 and the radial through hole 35, a tongue 37 formed between the first outer tube end surface 33, the radial through hole 35 and the connecting groove 36, And a first abutting block 38 protruding inward from the inner surface 31.

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

The first stop block 38 has the function of blocking the protrusion 23 of the inner tube 2 to prevent the inner tube 2 from escaping from the outer tube 3 when the inner tube 2 is pulled out 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 fixed to the outer tube 3, a fixed pivot block 42, a stop block 43, an accommodating groove 44, and a second stop block 45.

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 and a second sleeve connecting the outer cylindrical surface 412 and the inner cylindrical surface 411 The barrel end surface 414 and a through hole 415 extending along the axial direction L from the first sleeve end surface 413 toward the second sleeve end surface 414 and penetrating the outer cylindrical surface 412 and the inner cylindrical surface 411. The through hole 415 corresponds to the radial through hole 35 of the outer tube 3 and is not connected to the end surface 414 of the second sleeve 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 412 of the sleeve 41 toward a direction away from the through hole 415, and a first connecting portion 421 that extends from the first connecting portion 421 toward a direction close to the through hole 415. The first free portion 422 that is folded into a coil shape, 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 sleeve end surface 413 A connecting portion 421 and the other end of the first free portion 422 are opposite to the closed end 424 of the open end 423.

The stopper 43 is disposed between the first sleeve end surface 413 of the sleeve 41 and the inner cylindrical surface 411 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 stop 43 along the axial direction L and communicates with the through hole 415. The accommodating groove 44 is for the tongue 37 that is bent outward to be inserted, so that the tongue 37 can be It is blocked by the stopper 43 and does not touch the inner tube 2 and thus does not interfere with the movement of the inner tube 2.

The second stop block 45 is disposed on the inner cylinder surface 411 and connected to the stop block 43, The second stop block 45 has the function of blocking the protrusion 23 of the inner tube 2 to prevent the inner tube 2 from escaping from the outer tube 3 when the inner tube 2 is pulled out away from the outer tube 3. The second abutting block 45 and the first abutting block 38 block the protrusion 23 together, so that the effect of preventing the inner tube 2 from being separated from the outer tube 3 can be better.

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

The movable pivot block 53 of the urging member 50 has a second connecting portion 531 extending from the connecting block 52 toward a direction away from the pulling block 51, and a second connecting portion 531 toward a direction closer to the pulling block 51 It is bent in the direction of, and is in a winding shape, and is pivotally connected to the second free portion 532 of the first free portion 422.

1 and 5, the tongue 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.

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 and the first The free portion 422 is pivotally connected, and at the same time the connecting block 52, the second connecting portion 531 and the catch block 54 are located in the through hole 415 of the sleeve 41 and the radial perforation of the outer tube 3 35, and the second connecting portion 531 and the detent block 54 are blocked by the tongue block 37 and the stop block 43, and the urging member 50 is blocked by the tongue block 37 and the stop block 43 along the axial direction L The blocking of the closed end 424 can prevent the pressing member 50 from escaping from the positioning member 40.

Referring to Figures 5 to 8, by turning the flipping block 51, the movable pivot block 53 can be rotated relative to the fixed pivot block 42, so that the locking block 54 is at a locking position relative to the inner tube 2 And move between a loosening 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 relatively, so that the telescopic rod is in a position. The length can be adjusted. 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 turning block 51 is directed toward the side close to the sleeve 41 By turning in the direction, the detent block 54 can be moved to the detent position. When in the detent position, the detent block 54 passes through the through hole 415 and the radial perforation 35 and abuts against the inner tube 2, Make the inner tube 2 unable to move relative to the outer tube 3, and make the telescopic rod in a positioning state, if the pull block 51 is pulled again to move away from the sleeve 41, the catch block 54 can be moved away from the sleeve 41 The detent position moves to the release position.

Referring to Figures 1, 2, and 5, since the outer tube 3 is provided with the radial perforation 35 at a position adjacent to the end surface 33 of the first outer tube, the length of the tongue 37 along the axial direction L is limited, which may lead to The tongue 37 is not strong enough. Therefore, after assembling the positioning device 4 to the outer tube 3, the tongue 37 of the outer tube 3 is easily retracted and displaced to contact the inner tube 2 and 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 block 37 to be inserted and the stopper 43 to block the tongue block 37, the tongue block 37 can be prevented from being retracted and displaced from contacting the inner tube 2 without interfering 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.

In summary, the positioning device and the telescopic rod of the present invention are sleeved and fixed to the outer tube 3 by the positioning member 40, and by rotating the triggering block 51 of the tightening member 50, the locking The block 54 moves between the detent position and the release position relative to the inner tube 2 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 provide the positioning member 40 and the pressing member 50, and both the positioning member 40 and the pressing member 50 can be made of plastic. Compared with the previous proposal, it has fewer components and can reduce assembly. And manufacturing cost, and can effectively improve the yield and durability.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

2: inner tube

21: inner surface

22: Outer surface

23: bump

3: Outer tube

31: inner surface

32: Outer surface

33: The end of the first outer tube

34: The end of the second outer tube

35: Radial perforation

36: Connecting groove

37: Tongue block

38: The first stop block

4: positioning device

40: positioning parts

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: first connection part

422: First Freedom

423: open end

424: closed end

43: stop

44: accommodating slot

50: Compression

51: Pull the block

52: connection block

53: Activity pivot block

531: second connection part

532: Second Freedom

54: Snap Block

L: axial

Claims (8)

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. The positioning device for the telescopic rod includes: a positioning member, including a set fixed at The outer tube is a hollow cylindrical sleeve, and a fixed pivot block extending from the sleeve. The sleeve has an inner cylindrical surface, an outer cylindrical surface opposite to the inner cylindrical surface, and a penetrating through the outer cylindrical surface. The cylindrical surface and the inner cylindrical surface correspond to the radially perforated through hole of the outer tube; and a urging member, including a flipping block, a connecting block extending from the flipping block, and a connecting block facing away from the connecting block A movable pivot block that extends in the direction of the pulling block and is pivotally connected to the fixed pivot block of the positioning member and can pivot relative to the fixed pivot block, and a latch extending from the connecting block in a direction away from the movable pivot block Block, the locking block can move between a locking position that passes through the through hole and the radial perforation and abuts against the inner tube relative to the inner tube, and a loosening position detached from the inner tube, wherein, The fixed pivot block of the positioning member has a first connecting portion extending from the sleeve toward a direction away from the through hole, and a first free portion bent from the first connecting portion toward a direction approaching the through hole, The movable pivot block of the pressing member has a second connecting portion extending from the connecting block toward a direction away from the triggering block, and a second connecting portion bent from the second connecting portion toward a direction approaching the triggering block The free part, the second free part is pivotally connected to the first free part. A positioning device of a telescopic rod. The telescopic rod has an inner tube and an outer tube sleeved with each other. The outer tube has a radial perforation. The positioning device of the telescopic rod Containing: a positioning member, including a sleeve fixed to the outer tube and in a hollow cylindrical shape, and a fixed pivot block extending from the sleeve. The sleeve has an inner cylindrical surface and a sleeve opposite to the inner cylindrical surface. The outer cylindrical surface of the cylindrical surface, and a through hole that penetrates the outer cylindrical surface and the inner cylindrical surface and corresponds to the radial perforation of the outer tube; An extended connecting block, a movable pivot block extending from the connecting block in a direction away from the flipping block and pivotally connected to the fixed pivot block of the positioning member and capable of pivoting relative to the fixed pivot block, and a movable pivot block from the connecting block A detent block extending in a direction away from the movable pivot block, the detent block can be positioned opposite the inner tube at a position that passes through the through hole and the radial perforation and abuts against the inner tube and a detent position away from the inner tube The inner tube moves between the loosened positions, wherein the sleeve of the positioning member further includes a first sleeve end surface and a second sleeve end surface connecting the outer cylinder surface and the inner cylinder surface, and the through hole communicates with the The end surface of the first sleeve is not connected to the end surface of the second sleeve. A telescopic rod comprising: an inner tube; an outer tube sleeved on the outside of the inner tube, the outer tube including an inner surface, an outer surface opposite to the inner surface, and a penetrating through the outer surface and the inner surface And a positioning device, including a positioning member, and a pressing member pivotally connected to the positioning member, the positioning member having a sleeve fixed to the outer tube and in the shape of a hollow cylinder, and A fixed pivot block extending from the sleeve. The sleeve has an inner cylindrical surface, an outer cylindrical surface opposite to the inner cylindrical surface, and a penetrating through the outer cylindrical surface and The inner cylinder surface corresponds to the radially perforated through hole of the outer tube, and the urging member has a turning block, a connecting block extending from the turning block, and a connecting block facing away from the turning block A movable pivot block that extends in the direction of and is pivotally connected to the fixed pivot block of the positioning member and can pivot relative to the fixed pivot block, and a latch block extending from the connecting block toward a direction away from the movable pivot block, the card The detent block can move between a detent position that passes through the through hole and the radial perforation relative to the inner tube and abuts against the inner tube and a loose position that is separated from the inner tube, wherein the outer tube is also It includes a first outer tube end surface and a second outer tube end surface connecting the inner surface and the outer surface, a communication groove connecting the first outer tube end surface and the radial perforation, and a first outer tube The tongue between the end surface and the radial perforation and the communicating groove, the sleeve further has a first sleeve end surface and a second sleeve end surface connecting the outer cylindrical surface and the inner cylindrical surface, and the through hole is in communication The first sleeve end surface, the positioning member further has a stopper provided between the first sleeve end surface and the inner cylinder surface of the sleeve and extending into the through hole, and a stopper provided on the stopper for the tongue The accommodating slot into which the block is placed. The telescopic rod according to claim 3, 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 surface of the first sleeve, and a 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 according to claim 4, wherein the inner tube further includes a protrusion protruding outward, and the outer tube further includes a first abutment protruding inward from the inner surface and capable of blocking the protrusion. Stop block. The telescopic rod according to claim 5, wherein the positioning member further has a second stop block arranged on the inner cylinder surface and connected to the stop block and capable of blocking the protrusion. A telescopic rod comprising: an inner tube; an outer tube sleeved on the outside of the inner tube, the outer tube including an inner surface, an outer surface opposite to the inner surface, and a penetrating through the outer surface and the inner surface And a positioning device, including a positioning member, and a pressing member pivotally connected to the positioning member, the positioning member having a sleeve fixed to the outer tube and in the shape of a hollow cylinder, and A fixed pivot block extending from the sleeve, the sleeve having an inner cylindrical surface, an outer cylindrical surface opposite to the inner cylindrical surface, and a penetrating through the outer cylindrical surface and the inner cylindrical surface and corresponding to the outer tube A radially perforated through hole, the pressing member has a flip block, a connecting block extending from the flip block, and a connecting block extending from the connecting block toward a direction away from the flip block and fixed to the positioning member A movable pivot block pivotally connected to the pivot block and pivotable relative to the fixed pivot block, and a catch block extending from the connecting block toward a direction away from the movable pivot block, the catch block can be positioned opposite to the inner tube It passes through the through hole and the radial perforation and moves between a latching position that abuts the inner tube and a loosening position detached from the inner tube, wherein the fixed pivot block of the positioning member has a direction from the sleeve A first connecting portion extending away from the through hole, and a first free portion bent from the first connecting portion toward a direction close to the through hole, the movable pivot block of the pressing member has a connecting block A second connecting portion extending in a direction away from the flipping block, and a second free portion bent from the second connecting portion toward a direction approaching the flipping block, the second free portion and the first free portion Pivot. The telescopic rod according to claim 7, wherein the first free part is coiled The second free part is in a coiled shape.

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