TWM603065U - Telescopic rod - Google Patents

Abstract

A telescopic rod includes a fixed seat, an upper tube unit, a lower tube unit, a pulley block and an elastic piece. The down tube unit includes a first down tube and at least one second down tube. The pulley unit at least includes a fixed pulley mounted on the fixing base, a sliding block and a linkage rope arranged inside the upper tube unit. The interlocking rope has a first end located at the fixed seat or the sliding block, a second end connected to the second down tube, and a middle section. The middle section at least bypasses the fixed pulley, and the middle section can be opposite to The fixing seat is positioned, the elastic member springs against the fixing seat and the sliding block, and its constant elastic force keeps the sliding block away from the fixing seat and keeps the tension of the interlocking rope. With the overall configuration, the telescopic rod can be expanded or collapsed.

Description

Telescopic rod

The new model relates to a telescopic rod, in particular to a pulley type telescopic rod.

There is a collapsible multi-section telescopic rod (the prior art described in Taiwan Patent No. M596544), which includes a hollow upper tube and a first lower tube slidably inserted into the upper tube , Most of the second down tube connected in series, a linkage rope, and a card pin unit. The upper tube is sheathed with a handle, the first lower tube is provided with a through hole near the top end, and each of the second lower tubes has a joint fixed at the top.

The interlocking rope passes through the upper tube, the first lower tube and the second lower tubes, and has a first end fixed to the top of the upper tube, and a second end opposite to the first end , The second end is fixed to the joint of the second lower tube farthest from the upper tube. The locking pin unit has a positioning seat fixed to the top of the first down tube, an elastic piece connected to the positioning seat, and a locking pin fixed to the end of the elastic piece.

When the upper tube, the first down tube, and the second down tubes are sleeved into an expanded state, the joint of the second down tube adjacent to the first down tube can be inserted into the first down tube , The joint of the second lower tube farthest from the upper tube is inserted inside the adjacent second lower tube, the interlocking rope is in a straight state and has a relatively large tension, the locking pin of the locking pin unit It can be extended in the perforation, and the telescopic rod is in a use state with the maximum length.

When the user presses the locking pin, the tension of the interlocking rope is released, which will cause the locking pin and the perforation to be staggered. At this time, the operator can retract the first lower tube toward the inside of the upper tube because the interlocking rope Has been slack, so the second down tubes can be separated from the first down tube, the second down tubes can also be separated from each other, the first down tube can be retracted relative to the inside of the upper tube, and is The second lower tube may be parallel to the upper tube, and the telescopic rod is folded into a smaller length.

When the first down tube is pulled out relative to the upper tube, the second down tubes and the first down tube can be connected in series to form a straight rod shape until the bayonet of the bayonet pin unit is extended In the perforation, the telescopic rod is restored to the use state with the maximum length.

Although the above telescopic rod can achieve the purpose of folding, because the telescopic rod is to be folded from the maximum length of use, if the upper tube, the first down tube, and the second down tubes are separated from each other, the The first lower tube must be retracted inside the upper tube to have a larger length, and a compression spring sleeved between the second end of the interlocking rope and the corresponding joint must be made into a larger length and longer With a larger ring diameter, the second down tube will also have a larger tube diameter, and the overall weight is heavy.

In addition, when the user presses the latch and the first down tube retracts toward the inside of the upper tube, the operator's fingers may be pinched by the joint between the first down tube and the upper tube, which is dangerous to operate .

Therefore, the purpose of the present invention is to provide a telescopic rod that can solve the existing shortcomings.

Therefore, the telescopic rod of the present invention includes a fixed seat, an upper tube unit, a lower tube unit, a pulley block and an elastic member. The upper tube unit extends along an axis and is fixed to the fixing seat. The lower tube unit includes a first lower tube and at least one second lower tube that can be sleeved along the axis. The second lower tube has a positioning When the first down tube and the second down tube are sleeved with the upper tube unit along the axis, the first down tube is sleeved and positioned with the upper tube unit along the axis, and the pulley unit includes at least one The fixed pulley of the fixed seat, a sliding block slidably arranged inside the upper tube unit along the axis, and a linkage rope having a first end located at one of the fixed seat and the sliding block , A second end opposite to the first end and connected to the positioning portion, and an intermediate section arranged between the first end and the second end, the intermediate section at least bypassing the fixed pulley, the intermediate The segment can be positioned relative to the fixing base, the elastic member springs against the fixing base and the sliding block, and its constant elastic force keeps the sliding block away from the fixing base and keeps the interlocking rope in tension.

The effect of the present invention is that the intermediate section of the interlocking rope of the pulley unit is used to bypass the fixed pulley, so that the first down tube and the second down tube have a smaller operating stroke when dismantling along the axis, and the elastic member is The compressed length can be smaller and the overall weight can be reduced.

1 to 4, a first embodiment of the telescopic rod of the present invention includes a fixing base 10, a locking unit 20, an upper tube unit 30, a lower tube unit 40, a pulley block 50, and an elastic member 60.

The fixing seat 10 has a top surface 11, a bottom surface 12 opposite to the top surface 11, a positioning groove 13 recessed from the top surface 11, and two are disposed from the bottom surface 12 toward the top surface 11 and communicate with the positioning The upper hole 14 of the groove 13 and a pivot 15 arranged in the positioning groove 13.

The locking unit 20 is rotatably installed on the fixing base 10 and has an eccentric block 21 pivoted on the pivot 15 and an operating handle 22 connected to the eccentric block 21. The eccentric block 21 has a peripheral surface 211 that is eccentrically arranged with respect to the pivot shaft 15, and the peripheral surface 211 has a depressing portion 212 that generates the greatest distance from the pivot shaft 15. Pulling the operating handle 22 can drive the The depressing portion 212 of the eccentric block 21 rotates with the pivot 15 as the center of rotation.

The upper tube unit 30 extends along an axis L and includes an upper tube 31 fixed to the bottom of the fixing base 10 and a grip sleeve 32 covering the upper tube 31 and the outside of the fixing base 10.

The down tube unit 40 includes a first down tube 41 and a second down tube 42 that can be sleeved along the axis L. The first down tube 41 has a top end and can be inserted into the upper tube 31 At the bottom of the joint 411, the second down tube 42 has a positioning portion 421 that is arranged at the top and can be inserted into the bottom of the first down tube 41 and has the same shape as the joint 411.

The pulley unit 50 includes a pair of fixed pulleys 51 installed on the fixed seat 10, a sliding block 52 slidably disposed inside the upper tube unit 30 along the axis L, and a linkage rope 53, the sliding block 52 has A lower positioning rod 521 and two lower through holes 522 arranged on one side of the lower positioning rod 521. The interlocking rope 53 has a first end 531 located at the lower positioning rod 521, a second end 532 opposite to the first end 531 and connected to the positioning portion 421, and a second end 532 located between the first end 531 and the positioning part 421. The middle section 533 between the second ends 532, the middle section 533 bypasses the fixed pulley 51 and passes through the upper perforations 14 and one of the lower perforations 522 of the slider 52, and the middle section 533 can be received by the locking unit 20 It is pressed to produce positioning relative to the fixing base 10.

The elastic member 60 is a compression spring. The opposite ends of the elastic member 60 respectively spring against the bottom of the fixing base 10 and the top of the sliding block 52. The constant elastic force keeps the sliding block 52 away from the fixing base 10. , And keep the interlocking rope 53 under tension.

In order to further understand the effects of the cooperation of the various elements of the present invention, the technical means used, and the expected effects, the following will be explained again. It is believed that a deeper and specific understanding of the present invention can be obtained from this.

As shown in Figures 3, 4, and 5, when the entire assembly of the telescopic rod of the present invention is completed and is in an unfolded state of use, the upper tube unit 30 and the lower tube unit 40 are sleeved and formed along the axis L. In an unfolded state, there is a maximum length between the top surface 11 of the fixing seat 10 and the bottom end of the second down tube 42 of the down tube unit 40. At this time, using the elastic force of the elastic member 60, the interlocking rope 53 is linear and has a relatively large tension. And the intermediate section 533 of the interlocking rope 53 is clamped between the depressing portion 212 of the eccentric block 21 and the fixed pulley 51 to ensure that the interlocking rope 53 between the fixed pulley 51 and the slider 52 will not be pulled , You can keep the telescopic rod in the unfolded state.

When the user wants to fold the telescopic rod, as shown in Figures 5 and 6, the operator first pulls the operating handle 22 and drives the depressing portion 212 of the eccentric block 21 to rotate with the pivot 15 as the center of rotation. And the depressing part 212 is unscrewed from the fixed pulleys 51, the force originally clamped by the interlocking rope 53 is eliminated, and the operator disassembles the second down tube 42 and the first down tube 41, When the first lower tube 41 and the upper tube unit 30 are disassembled, the first end 531 of the interlocking rope 53 pulls the slider 52 toward the fixing seat 10 (the elastic member 60 is compressed and contains the back release Elastic force), the tension of the interlocking rope 53 is released and becomes slack, and the upper tube unit 30, the first lower tube 41, and the second lower tube 42 can be folded into a parallel parallel shape, and the telescopic rod When in a folded state.

When the telescopic rod is to be operated from the folded state to the expanded state, the operator only needs to connect the second down tube 42, the first down tube 41 and the upper tube unit 30 in series along the axis L, and use the The elastic force of the elastic member 60 can make the interlocking rope 53 be in a state of greater tension. The operator pulls the operating handle 22 and drives the depressing portion 212 of the eccentric block 21 to generate a rotation centered on the pivot 15 Rotate and make the depressing portion 212 rotate toward the fixed pulleys 51, the interlocking rope 53 will be clamped again, and the unfolded state of FIGS. 3 and 4 can be restored.

Therefore, the telescopic rod of the present invention utilizes the cooperation of integral members. When the first down tube 41 and the second down tube 42 are sleeved with the upper tube unit 30 along the axis L, the elastic force of the elastic member 60 makes the The interlocking rope 53 maintains tension, and the locking unit 20 is used to press the middle section 533 of the interlocking rope 53 to expand the telescopic rod into an elongated shape. When the locking unit 20 is operated and the compression of the interlocking rope 53 is released, the The linkage rope 53 cooperates with the elastic member 60 to allow the slider 52 to approach the fixing base 10, and to cause the first down tube 41 and the second down tube 42 to collapse relative to the upper tube unit 30, The telescopic rod can be operated from the unfolded state to the folded state, and the telescopic rod can achieve the purpose of reducing the volume when not in use, and the operation of unfolding or folding is quite easy.

And the main effect of the present invention is that the intermediate section 533 of the interlocking rope 53 of the pulley unit 50 is used to bypass the fixed pulley 51, and the interlocking rope 53 of the fixed seat 10 and the slider 52 can produce two bending sections, The bending sections share the operating stroke of the upper tube 31, the first lower tube 41, and the second lower tube 42 being separated from each other along the axis L, so the disassembly stroke is small, and the elastic member 60 is The compressed length can also be smaller, the elastic member 60 can be selected with a smaller ring diameter, and the upper tube 31 can be selected with a smaller tube diameter, so that the overall weight can be reduced.

It is worth mentioning that the shape and structure of the locking unit 20 of the present invention is quite simple, and by operating the operating handle 22, the depressing portion 212 of the eccentric block 21 can be driven to rotate with the pivot 15 as the center of rotation. In addition, the depressing portion 212 can press or release the middle section 533 of the interlocking rope 53. The operation is relatively simple, and the manufacturing and assembly are also easy.

As shown in Fig. 7, the difference between a second embodiment of the new telescopic rod and the first embodiment is that the fixing base 10 also has an upper positioning rod 16 arranged under the fixed pulleys 51, and the slider 52 has a movable pulley 521' (that is, the lower positioning rod of the first embodiment), the first end 531 of the interlocking rope 53 is positioned on the upper positioning rod 16, and the middle section 533 bypasses the movable pulley 521′ of the slider 52 And the fixed pulley 51 of the fixed seat 10. The fixed pulleys 51, the movable pulleys 521' of the slider 52, and the interlocking rope 53 together form a pulley set. The interlocking rope 53 of the fixed seat 10 and the slider 52 can generate three bending sections. The bending section shares the operating stroke of the upper tube 31, the first lower tube 41, and the second lower tube 42 being separated from each other along the axis L. Therefore, the disassembly stroke is smaller, and the same as the first embodiment can be achieved. The same purpose and effect.

As shown in Figure 8, the difference between the third embodiment of the telescopic rod of the present invention and the first embodiment is that: the number of fixed pulleys 51, 51' of the pulley unit 50 disposed on the fixed seat 10 is two, and these The fixed pulleys 51, 51' are arranged up and down, the sliding block 52 also has a movable pulley 523 arranged on one side of the lower positioning rod 521, the first end 531 of the interlocking rope 53 is positioned on the lower positioning rod 521, and the middle section 533 sequentially bypasses one of the fixed pulleys 51 ′, then bypasses the movable pulley 523 of the sliding block 52, and then bypasses the other fixed pulley 51 disposed on the fixed seat 10. The fixed pulleys 51, 51', the movable pulley 523 of the slider 52, and the interlocking rope 53 together constitute a pulley block. The interlocking rope 53 of the fixed seat 10 and the slider 52 can produce four bending sections. The bending sections share the operating stroke of the upper tube 31, the first lower tube 41 and the second lower tube 42 being separated from each other along the axis L. Therefore, the dismantling stroke is smaller, and the first The same purpose and effect as the embodiment.

In summary, the pulley-type telescopic rod of the present invention has a simple overall structure and easy operation, and can indeed achieve the purpose of a new type of cost.

However, the above-mentioned are only examples of the present model. When the scope of implementation of the present model cannot be limited by this, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

10: fixed seat 11: top surface 12: Bottom 13: positioning slot 14: Upper perforation 15: pivot 16: Upper positioning rod 20: Locking unit 21: eccentric block 211: Circumference 212: Pressure Department 22: Operating handle 30: Upper tube unit 31: upper tube 32: Grip 40: Down tube unit 41: The first down tube 411: Connector 42: second down tube 421: Positioning Department 50: pulley unit 51: fixed pulley 51’: Fixed pulley 52: Slider 521: Lower positioning rod 521’: Movable pulley 522: piercing 523: moving pulley 53: Linkage rope 531: first end 532: second end 533: middle section 60: Elastic L: axis

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which: Figure 1 is a perspective exploded view of a first embodiment of the new telescopic rod; Figure 2 is a partial enlarged schematic view of Figure 1; Figure 3 is a combined cross-sectional view of the first embodiment; Fig. 4 is a partial enlarged schematic diagram of Fig. 3; 5 is a schematic diagram of a folding operation of the first embodiment; Fig. 6 is a completed view of the first embodiment; Figure 7 is a schematic cross-sectional view of a second embodiment of the new telescopic rod; and Fig. 8 is a schematic cross-sectional view of a third embodiment of the new telescopic rod.

10: fixed seat

20: Locking unit

30: Upper tube unit

31: upper tube

32: Grip

40: Down tube unit

41: The first down tube

411: Connector

42: second down tube

421: Positioning Department

50: pulley unit

51: fixed pulley

52: Slider

521: Lower positioning rod

53: Linkage rope

531: first end

532: second end

533: middle section

60: Elastic

L: axis

Claims (9)

A telescopic pole, including: A fixed seat; An upper tube unit extending along an axis and fixed to the fixing seat; The lower pipe unit includes a first lower pipe and at least one second lower pipe that can be sleeved along the axis. The second lower pipe has a positioning portion, and the first down pipe and the second down pipe are along the When the axis is sleeved with the upper tube unit, the first lower tube is sleeved and positioned with the upper tube unit along the axis; A pulley unit includes at least a fixed pulley installed on the fixing seat, a sliding block slidably arranged inside the upper tube unit along the axis, and a linkage rope, the linkage rope having a certain position between the fixing seat and the A first end of one of the sliders, a second end opposite to the first end and connected to the positioning portion, and a middle section provided between the first end and the second end, the middle section At least bypass the fixed pulley; and An elastic member elastically abuts between the fixed base and the sliding block, and its constant elastic force keeps the sliding block away from the fixed base and keeps the tension of the interlocking rope. The telescopic rod according to claim 1, further comprising a locking unit installed on the fixing base, and the middle section of the interlocking rope can be pressed by the locking unit to be positioned relative to the fixing base. The telescopic rod according to claim 2, wherein the fixing seat has a pivot, the locking unit has an eccentric block pivoted on the pivot, and an operating handle connected to the eccentric block, the eccentric block has A peripheral surface that is eccentrically arranged with respect to the pivot axis, and the peripheral surface has a depressing part that produces the greatest distance from the pivot axis. Pulling the operating handle can drive the depressing part of the eccentric block to take the pivot as The rotation center generates rotation, and the depressing part is pressed against the middle section of the interlocking rope. The telescopic rod according to claim 1, wherein the sliding block of the pulley unit has a lower positioning rod, the first end of the linkage rope is positioned on the lower positioning rod, and the middle section bypasses the fixed pulley of the fixing seat. The telescopic rod according to claim 1, wherein the fixing base further has an upper positioning rod, the sliding block has a movable pulley, the first end of the interlocking rope is positioned on the upper positioning rod, and the middle section bypasses the sliding pulley. The movable pulley of the block and the fixed pulley of the fixed seat. The telescopic rod according to claim 1, wherein the number of fixed pulleys of the pulley unit arranged on the fixing seat is two, the sliding block has a lower positioning rod, and a movable pulley arranged on one side of the lower positioning rod, the The first end of the interlocking rope is positioned on the lower positioning rod, and the middle section sequentially bypasses one of the fixed pulleys, then bypasses the movable pulley of the slider, and then bypasses the other fixed pulley set on the fixed seat. The telescopic rod according to any one of claim 4 to claim 6, wherein the fixing seat has a pivot shaft arranged on one side of the fixed pulley, and the locking unit has an eccentric block pivoted on the pivot shaft, And an operating handle connected to the eccentric block. By operating the operating handle and linking the eccentric block, the eccentric block can press the linked rope that bypasses the fixed pulley to a fixed position or loosen the linked rope. The telescopic rod according to claim 5, wherein the fixing seat has two upper perforations provided on one side of the fixed pulley and for the interlocking rope to pass through. The telescopic pole according to claim 4, wherein the slider of the pulley set has at least one lower perforation for the linkage rope to pass through.

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