TWM487372U - Rotary telescopic rod - Google Patents

Description

Rotary telescopic rod

This creation is related to the use of telescopic rods for hand tools, especially a rotary telescopic rod.

In order to meet different usage distances, general hand tools (such as garden shears) have a design that can be adjusted in length to increase the convenience of use. In the related prior art, the telescopic rod disclosed in the applicant's application No. M268476 is controlled by the knob to deflect the rotating member. When the long diameter portion of the rotating member is pushed against the inner wall of the positioning ring, the positioning ring The rubber ring will abut against the inner wall of the outer tube, so that the outer tube cannot be moved relative to the inner tube to complete the fixing. When the long diameter portion of the rotating member leaves the inner wall of the positioning ring, the rubber ring of the positioning ring releases the outer tube. The inner wall allows the outer tube to be adjusted to the proper position.

However, after the actual operation, the applicant finds that it is difficult to achieve the desired contact effect between the long diameter portion of the rotating member and the inner wall of the positioning ring, so that the positioning ring cannot be effectively opened by the rotating member and the frictional force of the outer tube is affected. Therefore, when the outer tube is subjected to a large axial force, the sliding phenomenon is easily generated, and the conventional telescopic rod cannot stably maintain the relative length between the inner and outer tubes, so that there is a need for improvement in structure.

The main purpose of this creation is to provide a rotary telescopic rod with good positioning effect to stably maintain the phase between the inner and outer tubes. For the length.

In order to achieve the above objectives, the rotary telescopic rod of the present invention includes There is an outer tube, an inner tube, a rotating assembly, and a positioning ring. One end of the inner tube is axially movably disposed in the outer tube; the rotating assembly has a knob, a fixing base, and a connecting rod, the knob is rotatably disposed at one end of the outer tube, the fixing seat Located in the outer tube and fixed to one end of the inner tube, one end of the connecting rod is fixed to the knob, and the other end of the connecting rod is rotatably disposed on the fixing base, so that the connecting rod can be driven by the knob. In addition, the outer circumferential surface of the connecting rod has two opposite first radial convex portions; the positioning ring is sleeved on the fixing seat and is penetrated by the connecting rod, and the inner annular surface of the positioning ring has two opposite sides a second radial projection.

Thereby, when the knob is in the locked position, the first of the connecting rod The radial protrusion pushes against the second radial protrusion of the positioning ring, so that the outer ring surface of the positioning ring abuts against the inner wall surface of the outer tube, and the positioning between the inner and outer tubes is completed. When the knob is in the release position, the first radial protrusion of the connecting rod is disengaged from the second radial protrusion of the positioning ring, so that the outer ring surface of the positioning ring is separated from the inner wall surface of the outer tube, and then Adjust the relative length between the inner and outer tubes.

10‧‧‧ Telescopic rod

20‧‧‧External management

22‧‧‧End cover

24‧‧‧ Guide block

26‧‧‧ positioning convex

30‧‧‧Inside

40‧‧‧Rotating components

41‧‧‧ knob

412‧‧‧Arc guides

414‧‧‧First positioning recess

416‧‧‧Second positioning recess

P1‧‧‧Lock position

P2‧‧‧ release position

42‧‧‧ fixed seat

422‧‧‧Axial perforation

424‧‧‧ empty slots

43‧‧‧ linkage

432‧‧‧First radial projection

44, 45‧‧‧ screws

50‧‧‧ positioning ring

60‧‧‧Support

62‧‧‧second radial projection

64‧‧‧stops

70‧‧‧ friction parts

Fig. 1 is a perspective view showing a first embodiment of the creation.

Fig. 2 is an exploded perspective view showing the first embodiment of the creation.

Fig. 3 is a longitudinal sectional view showing the first embodiment of the present invention, mainly showing a state in which the knob is in the locked position.

Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3.

Figure 5 is a cross-sectional view taken along line 5-5 of Figure 3.

Figure 6 is similar to Figure 3 and shows the state of the knob in the release position.

Figure 7 is a cross-sectional view taken along line 7-7 of Figure 6.

Figure 8 is a cross-sectional view taken along line 8-8 of Figure 6.

Fig. 9 is an exploded perspective view showing the second embodiment of the creation.

Referring to Figures 1 and 2, the telescopic rod 10 of the present invention is mainly used in conjunction with a hand tool (such as a gardening shear), and includes an outer tube 20, an inner tube 30, a rotating assembly 40, and a positioning ring 50. .

The cross-sectional shape of the outer tube 20 is exemplified by an ellipse here. One end of the outer tube 20 is provided with an end cap 22, and the outer end surface of the end cap 22 has two opposite guide blocks 24, and the outer peripheral portion of each of the guide blocks 24 has a positioning convex portion 26.

The cross-sectional shape of the inner tube 30 is exemplified by an ellipse here. The inner tube 30 is inserted into the outer tube 20 from the other end of the outer tube 20, and is movable relative to the outer tube 20 by an external force.

The rotary unit 40 has a knob 41. The inner end surface of the knob 41 has two opposite arcuate guide grooves 412. As shown in FIGS. 4 and 7, each of the two ends of each of the arcuate guide grooves 412 has a first positioning recess 414 and A second positioning recess 416 is sleeved on the guide block 24 of the end cap 22 of the outer tube 20 by the arcuate guide groove 412 during assembly, so that the knob 41 can be opposite to the outer tube 20 at a locking position P1 and a release position P2. When the knob 41 is in the locking position P1, as shown in FIGS. 3 and 4, the first positioning recess 414 of the arcuate guide groove 412 of the knob 41 is engaged with the positioning protrusion of the end cover 22 of the outer tube 20. 26, when the knob 41 is in the release position P2, as shown in FIGS. 6 and 7, the second positioning recess 416 of the arcuate guide groove 412 of the knob 41 is engaged with the positioning projection 26 of the end cap 22 of the outer tube 20. In addition, the rotating assembly 40 further has a fixing base 42 and a connecting rod 43, wherein the fixing seat 42 is located in the outer tube 20 and fixed to one end of the inner tube 30, and has an axial through hole 422 and a hollow groove 424 communicating with the axial through hole 422. The outer peripheral surface of the connecting rod 43 has The first radial protrusion 432 is fixed in the outer tube 20 during assembly and the one end of the link 43 is locked in the knob 41 by a screw 44, so that the link 43 can be synchronized by the knob 41. The other end of the connecting rod 43 is rotatably inserted into the axial through hole 422 of the fixing base 42 and is engaged with the fixing seat 42 by another screw 45, so that the fixing seat 42 does not follow the connection. The rod 43 rotates.

The positioning ring 50 has a C-shaped cross section and has a support member 60 and A friction member 70, as shown in Figures 5 and 8, the inner annular surface of the support member 60 has two opposite second radial projections 62, and each of the second radial projections 62 is adjacently provided with a stopper portion 64 for friction. The member 70 is attached to the outer surface of the support member 60 for providing a frictional effect on the inner wall surface of the outer tube 20. In the assembly, the positioning ring 50 is sleeved on the fixing base 42 to make the support member 60 of the positioning ring 50 The two radial convex portions 62 and the stopper portion 64 are embedded in the hollow groove 424 of the fixing base 42 (as shown in Fig. 2). It should be additionally noted that the support member 60 is made of a material having rigidity as a material, such as a metal plate, a plastic steel, and a hard plastic, and the friction member 70 is made of plastic, rubber or the like having a high friction coefficient. The soft material is the best material, and the two can be combined by adhesive or plastic secondary injection.

When the relative length between the outer tube 20 and the inner tube 30 is to be adjusted, the first First, the knob 41 is rotated to the release position P2 as shown in FIG. 6. At this time, the knob 41 drives the link 43 to rotate relative to the positioning ring 50, so that the first radial protrusion 432 of the link 43 is disengaged from the positioning ring 50. The second radial protrusion 62 of the support member 60 is as shown in FIG. 8, so that the outer ring surface of the friction member 70 of the positioning ring 50 releases the outer tube. The tight force of the wall surface within 20 can adjust the length of the outer tube 20 relative to the inner tube 30 at this time.

When the outer tube 20 is adjusted to the appropriate position, it will be rotated again. The button 41 is rotated to the locking position P1 as shown in Fig. 3, causing the first radial projection 432 of the link 43 to push against the second radial projection 62 of the support member 60 of the positioning ring 50, and let the link 43 The first radial protrusion 432 abuts against the stopping portion 64 of the support member 60 of the positioning ring 50. At this time, the positioning ring 50 generates radial expansion and is forced by the outer ring surface of the friction member 70 of the positioning ring 50. The inner wall surface of the outer tube 20 is tight to complete the positioning of the outer tube 20.

In summary, the first radial protrusion 432 of the connecting rod 43 is fixed The cooperation between the second radial protrusions 62 of the bit ring 50 can significantly improve the contact effect between the link 43 and the positioning ring 50, so that the positioning ring 50 and the outer tube 20 have a good positioning effect. The relative length between the inner and outer tubes 30, 20 is stably maintained. Finally, it should be additionally noted that the cross-sectional shape of the outer tube 20 and the cross-sectional shape of the inner tube 30 may also adopt a non-elliptical configuration (such as the polygon shown in Fig. 9) to increase the strength of the overall structure.

20‧‧‧External management

22‧‧‧End cover

24‧‧‧ Guide block

30‧‧‧Inside

41‧‧‧ knob

42‧‧‧ fixed seat

422‧‧‧Axial perforation

424‧‧‧ empty slots

43‧‧‧ linkage

432‧‧‧First radial projection

44, 45‧‧‧ screws

50‧‧‧ positioning ring

62‧‧‧second radial projection

Claims (6)

A rotary telescopic rod includes: an outer tube; an inner tube axially movably disposed in the outer tube; a rotating assembly having a knob, a fixed seat, and a connecting rod, the knob One end of the outer tube is rotatably disposed between a locking position and a release position, the fixing seat is located in the outer tube and is fixed to one end of the inner tube, and one end of the connecting rod is fixed to the knob, the connecting rod The other end of the connecting rod is rotatably disposed on the fixing seat, the outer peripheral surface of the connecting rod has two opposite first radial convex portions, and a positioning ring is sleeved on the fixing seat and is pierced by the connecting rod. The inner annular surface of the positioning ring has two opposite second radial protrusions; wherein, when the knob is in the locking position, the first radial convex portion of the connecting rod pushes against the second radial convex portion of the positioning ring Abutting the outer annular surface of the positioning ring against the inner wall surface of the outer tube, and when the knob is in the releasing position, the first radial convex portion of the connecting rod is disengaged from the second radial convex portion of the positioning ring, The outer ring surface of the outer ring is separated from the outer ring surface of the outer ring. The rotary telescopic rod according to claim 1, wherein the inner ring surface of the positioning ring further has two opposite stopping portions, each of the stopping portions is adjacent to the second radial convex portion, when the knob is located In the locked position, the first radial protrusion of the link abuts against the stop of the positioning ring. The rotary telescopic rod according to claim 1, wherein the positioning ring has a support member and a friction member, and the inner annular surface of the support member has the second radial protrusion, and the friction member is disposed on the support member. Outer torus. The rotary telescopic rod of claim 3, wherein the inner ring surface of the support member of the positioning ring further has two opposite stopping portions, each of the blocking portions being adjacent to the second radial convex portion. When the knob is in the locked position, the first radial protrusion of the link abuts against the stop of the support of the positioning ring. The rotary telescopic rod according to any one of claims 1 to 4, wherein the positioning ring has a C-shaped cross section. The rotary telescopic rod according to claim 1, wherein one end of the outer tube is provided with an end cover, and the outer end surface of the end cover has a guide block, and the outer peripheral surface of the guide block has a positioning convex portion inside the knob. The end surface has an arcuate guide groove, and the arcuate guide groove is sleeved on the guide block of the end cover. The two ends of the arcuate guide groove respectively have a first positioning concave portion and a second positioning concave portion. When the position is locked, the first positioning concave portion of the guiding groove of the knob is engaged with the positioning convex portion of the end cover of the outer tube. When the knob is in the releasing position, the second positioning concave portion of the guiding groove of the knob is engaged with a positioning protrusion of the end cap of the outer tube.