TWI833587B - Telescopic rod retracting fixation device - Google Patents

Abstract

A telescopic rod folding and fixing device includes an outer pipe fitting, an inner pipe fitting, an end piece and a sliding sleeve. A first end of the outer pipe has a through hole. The inner pipe is slidably inserted inside the outer pipe and has an inner end and an outer end. The end piece is fixed to the outer pipe and has an extending end. On the perforated spring hook, the sliding member is slidably sleeved on the outside of the outer pipe member and has a pressing portion corresponding to the spring hook. When the sliding sleeve approaches the end piece, the pressing portion presses the spring hook to pass through the through hole and is pressed against the inner pipe fitting, thereby increasing the tight fit and stability of the inner pipe fitting and the outer pipe fitting. When the sliding sleeve moves away from the end piece, the spring hook is released relative to the inner tube piece.

Description

Telescopic rod retracting fixation device

The present invention relates to a telescopic rod, and in particular to a telescopic rod folding and fixing device.

There is an existing telescopic rod (revealed in the specification of Taiwan Patent Certificate No. I709466), which includes a first rod, a second rod and a positioning device. The first rod has a through hole and a first positioning hole communicating with the through hole. The second rod is movably inserted through the through hole and has a plurality of second positioning holes. Any second positioning hole can be aligned with the first positioning hole. The positioning device includes a control component, a positioning component and an elastic component. The control member is movably sleeved on the first rod member. The positioning member is movably inserted through the first positioning hole and is located between the second rod member and the control member. The positioning member can be pressed by the control member and detachably engage with the second positioning hole. . The elastic member is connected to the positioning member and elastically deforms in response to the positioning member being pressed by the control member. When the positioning member is not pressed by the control member, the elastic recovery of the elastic member is used to separate from the second positioning hole, so that the positioning member is not pressed by the control member. The second rod is movable relative to the first rod.

When the user exerts force on the control member, the positioning member is supported by the first elastic member The linkage can move relative to the first positioning hole and the corresponding second positioning hole, so that the positioning device changes between the release position and the locking position, thereby achieving the purpose of adjusting the length of the telescopic rod.

Although this kind of telescopic rod can adjust the length, because a sliding gap must be reserved between the first rod and the second rod, this gap will allow the first rod and the second rod to move along the Radial shaking occurs. When the telescopic rod is used in a crutch chair or cane, the shaking may cause the user's walking to be unstable.

Therefore, an object of the present invention is to provide a telescopic rod retracting and fixing device that can provide better tight fit and stability.

Therefore, the telescopic rod retracting and fixing device of the present invention includes an outer pipe piece, an inner pipe piece, an end piece and a sliding sleeve. The outer tube has a first end and a second end opposite to the first end, and the first end has a through hole. The inner pipe is slidably inserted inside the outer pipe and has an inner end between the first end and the second end, and an outer end extending from the first end to the outside of the outer pipe. . The end piece is fixed on the first end of the outer pipe piece and has a spring hook extending into the through hole. The sliding sleeve is slidably sleeved on the outside of the outer pipe and has a pressing portion corresponding to the spring hook. When the sliding sleeve approaches the end piece, the pressing portion presses the spring hook to pass through the through hole. And it is pressed against the inner pipe fitting. When the sliding sleeve is away from the end piece, the spring hook is released relative to the inner pipe fitting.

The effect of the present invention is that the end piece is provided with the spring hook, and the When the sliding sleeve approaches the end piece, the pressing portion presses the spring hook to pass through the through hole and presses the inner pipe fitting, so that the inner pipe fitting can be increased when the sliding sleeve approaches the end piece. The tight fit and stability of the outer pipe fitting.

10:Outer pipe fittings

11:First end

111: Duan Yuan

112:Perforation

113: Positioning hole

12:Second end

13:Adjustment hole

14: Actuation Department

15: Card embedded part

20:Inner pipe fittings

21:Inside end

22:Outside end

23:Slingshot

231: stuck column

30: End piece

31:End wall

311:Upper end surface

312:Lower end face

313:Inner hole

314: Ring groove

32: Ring wall

321:Connect the end

322: terminal part

323:Inner peripheral surface

324: Outer peripheral surface

325: slit

326: jam block

327: Bottom edge

328: Guide slope

33:Bounce hook

331:Hook block

40:Sliding kit

41:Upper end

42:Lower end

43:Inner ring surface

44: Pressure Department

45: Engagement part

50: Pivot unit

51:Pivot

52:Pivot

60:Support unit

61: Actuation Department

70: Seat unit

71:Motherboard parts

72:Side panel parts

721:Buckle

722:Buckle

80: Connecting rod unit

81:First connecting rod

82:Second connecting rod

90: handle

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view of an embodiment of the telescopic rod retracting and fixing device of the present invention, and shows that the embodiment is suitable for a Crutch chair; Figure 2 is a perspective view of the crutch chair from another perspective; Figure 3 is a partially exploded perspective view of the embodiment; Figure 4 is a schematic perspective view of one end piece of the embodiment; Figure 5 is a retracted view of the crutch chair. A three-dimensional assembled view of the folded state; Figure 6 is an assembled cross-sectional view of the crutch chair in the folded state; Figure 7 is a partially enlarged schematic view of Figure 6; Figure 8 is a cross-sectional view along line VII-VII in Figure 7; Figure 9 is a plan assembly view of this embodiment applied to a cane, illustrating a state in which a sliding member is away from the end piece; Figure 10 is a cross-sectional view along line X-X in Figure 9; Figure 11 is a view similar to Figure 9 An operational schematic diagram illustrating the state of the sliding assembly approaching the end piece; and Fig. 12 is a cross-sectional view taken along line XII-XII in Fig. 11.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated with the same numbering.

Referring to FIGS. 1 to 2 , an embodiment of the telescopic rod folding and fixing device of the present invention includes an outer pipe piece 10 , an inner pipe piece 20 , an end piece 30 and a sliding assembly 40 . The telescopic rod folding and fixing device is suitable for a crutch chair. The crutch chair also includes a pivot base unit 50, two support units 60 pivoted to the pivot base unit 50, and a seat unit pivoted to the sliding assembly 40. 70, and a link unit 80 pivotally connected to the pivot unit 50 and the sliding assembly 40 and connected to the seat unit 70.

Referring to FIG. 3 , the outer tube 10 is in the shape of a hollow tube and has a first end 11 and a second end 12 opposite to the first end 11 . Most of them are spaced apart from the first end 11 and the second end. 12, a detent 14 (see Figure 2) provided between the first end 11 and the second end 12, and an adjustment hole 13 provided between the first end 11 and the second end 12. The embedded part 15 between them. The first end 11 has an end edge 111 , a through hole 112 provided inside the end edge 111 , and a positioning hole 113 provided opposite to the through hole 112 . The engaging portion 15 is disposed between the latch portion 14 and the first end 11 .

The inner pipe member 20 is slidably inserted inside the outer pipe member 10 and has an inner end 21 located between the first end 11 and the second end 12 , and an inner end 21 extending from the first end 11 to the outer end. The outer outer end 22 of the pipe 10, and an inner end 21 approaching the The slingshot 23 has a clamping post 231 nested in any adjustment hole 13 .

Referring to Figures 4, 7 and 8, the end piece 30 is fixed on the first end 11 of the outer tube 10. Referring to Figures 3 and 4, the end piece 30 is in the shape of a hollow cylinder, and the end piece 30 includes a stop. An end wall 31 positioned at the end edge 111 of the outer pipe 10 , an annular wall 32 connected to the end wall 31 , and a spring hook 33 connected to the annular wall 32 . The end wall 31 has an upper end surface 311, a lower end surface 312 opposite to the upper end surface 311, and an inner hole 313 connecting the upper end surface 311 and the lower end surface 312 for the inner pipe member 20 to pass through. The lower end surface 312 has an annular groove 314 for the end edge 111 of the outer pipe member 10 to fit into, and the inner pipe member 20 passes out of the end member 30 from the inner hole 313 . The annular wall 32 has a connecting end portion 321 connected to the lower end surface 312, an end portion 322 opposite to the connecting end portion 321, an inner peripheral surface 323 extending from the connecting end portion 321 to the end portion 322, An outer circumferential surface 324 opposite to the inner circumferential surface 323, two slits 325 extending from the end portion 322 toward the end wall 31 and penetrating the inner circumferential surface 323 and the outer circumferential surface 324, and a slit protruding from the inner circumference. surface 323 and engages the blocking block 326 in the positioning hole 113 . The end portion 322 has a bottom edge 327 opposite to the end wall 31 , and a guide inclined surface 328 located between the bottom edge 327 and the outer peripheral surface 324 . The guide inclined surface 328 runs from the bottom edge 327 toward the end wall 31 (The outer peripheral surface 324) expands outward when extended. The spring hook 33 is formed between the slits 325 . The spring hook 33 is arranged opposite to the blocking block 326 . The spring hook 33 has a hook block 331 protruding from the inner peripheral surface 323 and extending into the through hole 112 .

The sliding member 40 is in the shape of a hollow cylinder and is slidably mounted on the outer pipe 10 Externally, the sliding member 40 has an upper end 41 , a lower end 42 opposite to the upper end 41 , an inner annular surface 43 extending from the upper end 41 to the lower end 42 , and an inner annular surface 43 disposed on the inner annular surface 43 . There is a detent portion 44 close to the upper end 41 and an engaging portion 45 recessed from the lower end 42 in the shape of a concave hole. The pressing portion 44 is inclined plane relative to the end portion 322 of the upper end portion 41 , and gradually expands toward the outer tube 10 when extending from the upper end portion 41 toward the lower end portion 42 . The pressing portion 44 corresponds to the hook 33 and the guide inclined surface 328 .

The pivot base unit 50 has a pivot base 51 and a pivot post 52 protruding from the center of the pivot base 51 .

The support units 60 are pivotally connected to the pivot base 51 of the pivot base unit 50 , the outer pipe member 10 and the support units 60 are jointly pivotally connected to the pivot base unit 50 , and the support units 60 and the outer pipe member 10 surround The pivot posts 52 are arranged at intervals. Each support unit 60 also has a latch part 61 (the functional relationship between the latch parts 14 and 61 is not the focus of the present invention, so it will not be described in detail. Please refer to the applicant's approved TW Patent Certificate No. I730881 patent case) .

The seat unit 70 has a main panel 71 pivotally connected to the sliding assembly 40, and a pair of side panels 72 that are parallel to the main panel 71 and respectively supported by the tops of the support units 60. One side panel The movable side edge of the member 72 has a buckle piece 721, and the movable side edge of the other side plate member 72 has a buckle ring 722 that can interlock with the buckle piece 721.

The link unit 80 has a link pivotally connected to the pivot 52 and can move along the main panel. 71 has a first connecting rod 81 that slides at the bottom, and a second connecting rod 82 that is pivotally connected between the first connecting rod 81 and the sliding assembly 40 .

In order to further understand the functions of the various components of the present invention, the technical means used, and the expected effects, they will be further described below. I believe that this will provide a more in-depth and specific understanding of the present invention.

As shown in Figures 1, 2, and 5 to 8, in the assembled state, the end piece 30 is engaged in the positioning hole 113 using the clamping block 326 protruding from the inner peripheral surface 323. The end piece 30 is fixed to the first end 11 of the outer pipe piece 10 . And by pressing the clamping column 231, the inner pipe fitting 20 can be adjusted to expand and contract relative to the outer pipe fitting 10. After adjustment, the clamping column 231 can be nested in the corresponding adjustment hole 13, so that the inner pipe fitting 20 can be adjusted relative to the outer pipe fitting 10. The pipe 10 remains fixed.

As shown in Figures 1 and 2, when the outer tube 10 and the support units 60 of the present invention are in an unfolded state, the seat unit 70 is also in an unfolded sitting state, and the seat unit 70 and the support units 60 are in an unfolded sitting state. The outer tube member 10 forms an included angle, that is, it forms a chair state for sitting. At this time, the second end 12 of the outer tube 10 and the bottom ends of the support units 60 are away from each other. The first end 11 of the outer tube 10 and the top ends of the support units 60 are also far away from each other, and the support units 60 are respectively supported at the bottom of the side plate members 72 , and the bottom of the main plate member 71 is supported by the first connecting rod 81 is supported, and one end of the main plate 71 is pivotally connected to the sliding assembly 40 . At this time, the sliding assembly 40 is away from the end piece 30 , and the spring hook 33 is released relative to the inner tube piece 20 . The engaging portion 45 of the sliding sleeve 40 and the engaging portion of the outer tube 10 15 are nested into each other, and the sliding sleeve 40 is positioned relative to the outer pipe member 10 .

When the operator slides the sliding set 40 upward along the outer tube 10, the sliding set 40 is used to link the link unit 80, and the link unit 80 can link the seat unit 70 to transform from a sitting state to a backrest. combined status. At the same time, the link unit 80 also links the outer pipe member 10 that is sleeved with the sliding sleeve 40 to pivot relative to the pivot unit 50, and through the mutual braking of the braking parts 14 and 61, the The support unit 60 also changes from the unfolded state to the folded state (see Figures 5 and 6). When the seat unit 70 is in the close state, the sliding set 40 approaches the end piece 30, and the pressing portion 44 sets It is provided on the guide inclined surface 328, and the pressing part 44 presses the spring hook 33 (see Figure 7). The hook block 331 of the spring hook 33 passes through the through hole 112 and is pressed on the inner pipe member 20, which can increase the inner diameter of the spring hook 33. The tight fit and stability of the pipe fitting 20 and the outer pipe fitting 10.

And when the seat unit 70 is in the close state, the buckle piece 721 of one side panel 72 and the buckle 722 of the other side panel 72 are interlocked with each other, so that the seat unit 70 cannot be easily unfolded. It can be ensured that the sliding set 40 remains positioned relative to the end piece 30 and the sliding set 40 will not be arbitrarily dislodged relative to the end piece 30 .

Therefore, the present invention uses the sliding member 40 to approach the end piece 30 and when the seat unit 70 is folded from the unfolded state to the close state, the pressing portion 44 can be sleeved on the guide slope 328 The action of the pressing part 44 is synchronized to press the spring hook 33 through the through hole 112 and to press the inner pipe fitting 20, thereby increasing the tight fit and stability of the inner pipe fitting 20 and the outer pipe fitting 10. Purpose.

As shown in FIGS. 9 and 10 , the telescopic rod retracting and fixing device of the present invention can also be applied to a walking stick. The walking stick further includes a handle 90 installed on the outer end 22 of the inner pipe member 20 . As shown in FIGS. 9 and 10 , when the sliding set 40 is away from the end piece 30 , the engaging portion 45 of the sliding set 40 and the engaging portion 15 of the outer tube 10 are nested with each other. The sleeve 40 is positioned relative to the outer tube 10 .

As shown in FIGS. 11 and 12 , when the sliding set 40 is operated to slide upward along the outer tube 10 and approaches the end piece 30 , the engaging portion 45 is separated from the inserting portion 15 , and the sliding set 40 The pressing portion 44 presses the spring hook 33 of the end piece 30 (see Figure 7), which can increase the tight fit and stability of the inner pipe fitting 20 and the outer pipe fitting 10, and improve the stability of the cane.

In summary, the telescopic rod retracting and fixing device of the present invention has a simple overall structure, is easy to manufacture and assemble, and can indeed achieve the purpose of the present invention.

However, the above are only examples of the present invention. They cannot be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the contents of the patent specification are still within the scope of the present invention. within the scope covered by the patent of this invention.

10:Outer pipe fittings

11:First end

111: Duan Yuan

112:Perforation

113: Positioning hole

12:Second end

13:Adjustment hole

15: Card embedded part

20:Inner pipe fittings

21:Inside end

22:Outside end

23:Slingshot

231: stuck column

30: End piece

40:Sliding kit

41:Upper end

42:Lower end

43:Inner ring surface

44: Pressure Department

45: Engagement part

50: Pivot unit

60:Support unit

70: Seat unit

72:Side panel parts

721:Buckle

Claims (7)

A telescopic rod folding and fixing device, including: An outer pipe member having a first end and a second end opposite to the first end, the first end having a through hole; An inner pipe member is slidably inserted inside the outer pipe member and has an inner end located between the first end and the second end, and an outer end extending from the first end to the outside of the outer pipe member. end; An end piece is fixed to the first end of the outer pipe piece and has a spring hook extending into the through hole; and A sliding set is slidably sleeved on the outside of the outer pipe and has a depressing portion corresponding to the spring hook. When the sliding set approaches the end piece, the depressing portion presses the spring hook to pass through the end piece. The hole is perforated and pressed against the inner pipe piece. When the sliding sleeve is away from the end piece, the spring hook is released relative to the inner pipe piece. The telescopic rod retracting and fixing device according to claim 1, wherein the end piece includes an end wall that resists the first end edge of the outer pipe piece, and an annular wall connected to the end wall, the The end wall has an inner hole for the inner pipe member to pass through, the spring hook is provided on the annular wall, and the annular wall also has an end portion opposite to the end wall, and the end portion has an end portion opposite to the end wall. The bottom edge, and a guide inclined surface located inside the bottom edge, the guide inclined surface gradually expands outward when extending from the bottom edge toward the end wall, the sliding sleeve also has an upper end portion relative to the end portion, and A lower end opposite to the upper end, the pressing portion is in the shape of a slope, and gradually expands toward the outer tube when extending from the upper end toward the lower end. The telescopic rod folding and fixing device according to claim 2, wherein the ring wall of the end piece also has two slits extending from the end portion toward the end wall, and the spring hook is formed between the slits. The telescopic rod retracting and fixing device according to claim 2, wherein the first end of the outer pipe member also has a positioning hole, and the annular wall of the end member also has a clamping block that is engaged in the positioning hole, and the The clamping block is arranged relative to the spring hook. The telescopic rod retracting and fixing device according to claim 2, wherein the outer pipe member also has an inserting portion disposed between the first end and the second end, and the sliding member further has an insert formed by the lower end portion. There is a recessed engaging portion. When the sliding sleeve is away from the end piece, the engaging portion and the engaging portion are nested in each other. The telescopic rod retracting and fixing device as described in claim 5 is suitable for a crutch chair. The crutch chair further includes a pivot base unit, two support units pivoted to the pivot base unit, and a sliding assembly pivoted to the sliding member. The seat unit, and a link unit pivotally connected to the pivot unit and the sliding set and connected to the seat unit, the outer pipe and the support units are jointly pivotally connected to the pivot unit, and the sliding set tends to When it is close to the end piece, the seat unit is in a folded state relative to the outer tube piece. When the sliding member is far away from the end piece, the seat unit is unfolded relative to the outer tube piece and intersects at an angle. Sitting state. The telescopic rod folding and fixing device as described in claim 5 is suitable for a walking stick, and the walking stick further includes a handle installed on the outer end of the inner pipe member.