Telescopic rod

Abstract

The telescopic rod comprises an inner pipe and an outer pipe coaxially arranged outside the inner pipe in a sleeved mode, a locking base is arranged between the inner pipe and the outer pipe, the locking base is fixedly connected to the end, located in the outer pipe, of the inner pipe, a cavity is formed in the locking base, a sliding groove is formed in the cavity in the radial direction of the inner pipe, a sliding block is connected into the sliding groove in a sliding mode, and the sliding block is fixedly connected with the inner pipe. A positioning pin is arranged at one radial end of the sliding block and moves along with the sliding block, an elastic piece is arranged between the other radial end of the sliding block and the cavity, a pulley is further rotationally arranged in the cavity, a traction rope is fixed to the sliding block, and one end of the traction rope is connected to the end, provided with the elastic piece, of the sliding block; and the other end bypasses the pulley and axially extends along the inner pipe to serve as a force application end. The device is simple in structure, easy to implement and good in stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to telescopic rod technical field, especially a telescopic rod. BACKGROUND

[0002] The manual telescopic rod is very wide in application, such as being used for curtain rod and door curtain rod etc., two rod-shaped pieces are mutually sleeved and form relative sliding, locking mechanism is arranged between the two rod-shaped pieces, locking is carried out through the locking mechanism when the two rod-shaped pieces mutually stretch or lengthen, thereby realizing the telescopic function of the telescopic rod, the locking structure of the telescopic rod on the market is usually complex in structure, not only increases the manufacturing cost, but also is heavy in quality and is not enough in portability. SUMMARY

[0003] The utility model aims at solving the technical insufficiency of the above-mentioned and designs a telescopic rod.

[0004] The utility model discloses a telescopic rod, including the inner tube and coaxial sleeve setting the outer tube in the outer tube, be equipped with the locking seat between the inner tube and the outer tube, the locking seat fixedly connected with the one end of the inner tube in the inside of the outer tube, the locking seat inside has the cavity, the cavity is along the radial direction of the inner tube and is equipped with the sliding slot, the sliding block is connected with the sliding slot in the sliding groove, the one end of the sliding block is equipped with the positioning pin to the radial direction, the positioning pin moves along with the sliding block, be equipped with the elastic piece between the other end of the sliding block to the radial direction and the cavity, the cavity is still equipped with the pulley and rotates, the pulley and the positioning pin are located respectively at the both ends position of the elastic piece, the sliding block is fixed with the towrope, the one end of the towrope is connected with the end of the sliding block and leans against the elastic piece, the other end is passed through the pulley and then extends along the inner tube axial force end as,

[0005] When the force end of the towrope is driven and the towrope is pulled, the towrope pulls the sliding block along the pulley, makes the sliding block compresses the elastic piece and slides, further drives the positioning pin to contract, when the driving force of the force end is removed, the sliding block reversely slides under the restoring force of the elastic piece, further drives the positioning pin to lengthen,

[0006] The first radial hole is equipped on the peripheral wall of the locking seat for the telescopic positioning pin, the second radial hole is equipped at the corresponding place of the inner tube, so that the positioning pin can be telescopic along the first radial hole and the second radial hole, the outer tube is equipped with a plurality of positioning holes along the axial direction, when the positioning pin is in the contraction state, the outer tube and the inner tube can slide along the axial direction, when the positioning pin is in the lengthening state, the positioning pin passes through the second radial hole and extends into the positioning hole to form positioning with the positioning hole, at this time, the outer tube and the inner tube form locking.

[0007] As preferred, the locking seat comprises a first end and a second end, the outer diameter of the first end is smaller than that of the second end, the inner tube is sleeved with the first end, and the outer tube is sleeved with the second end and the inner tube.

[0008] Further optimization, the outer peripheral wall of the first end is provided with symmetrically distributed grooves, the inner wall of the groove extends out a buckle block with elastic deformation, the peripheral wall of the inner tube is provided with a clamping groove, and the buckle block is clamped in the clamping groove to form a limit after the inner tube is sleeved with the first end, so that the first end and the inner tube are fixed with each other.

[0009] Further optimization, the locking seat is formed by clamping and splicing two seat bodies which are radially divided into two halves, cavities are formed in the two seat bodies, and the cavities of the two seat bodies form a complete cavity after splicing; the edges of the two seat bodies are provided with a half hole structure, and the two seat bodies form a complete first radial through hole after splicing.

[0010] As preferred, the one side surface of the sliding block is provided with a first guide groove, and the inner wall of the cavity of the locking seat is provided with a first guide rail which is in sliding cooperation with the first guide groove.

[0011] Further optimization, the other side surface opposite to the one side surface of the sliding block is provided with a second guide rail, and the inner wall of the cavity of the locking seat is provided with a second guide groove which is in sliding cooperation with the second guide rail.

[0012] As preferred, one end of the sliding block is provided with a mounting hole, the central part of the mounting hole is provided with a positioning column, the elastic member is a spring, and one end of the spring is located in the mounting hole and is sleeved on the positioning column.

[0013] As preferred, the inner tube and the outer tube are both circular tube structures, the inner tube and the outer tube are provided with axially extending limiting grooves on the side where the positioning pin is located, and the second radial through hole and the positioning hole are both located in the corresponding limiting grooves.

[0014] The technical effect of the utility model is that the inner tube and the outer tube are sleeved with each other, the inner tube is inserted into the end part of the outer tube which is provided with a locking seat, the locking seat is internally provided with a sliding block and a pulley, the sliding block is slidingly connected in the locking seat, the pulley is rotationally connected in the locking seat, the sliding block is provided with a positioning pin, and an elastic member is arranged between the sliding block and the inner part of the locking seat, so that the positioning pin is in a constant extension state under the elastic force of the elastic member, the positioning pin is inserted into the positioning hole of the outer tube, so that the inner tube and the outer tube are locked; a traction rope is connected to the sliding block, the sliding block is pulled by pulling the traction rope, the traction rope is pulled along the pulley, the sliding block compresses the elastic member, so that the positioning pin is retracted, and then the inner tube and the outer tube can slide relative to each other, that is, the length adjustment of the telescopic rod is realized, therefore, the utility model not only has simple structure and is easy to realize, but also has good stability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1It is the overall structure explosion map of the utility model;

[0016] Figure 2 It is the structure drawing of the locking seat in the utility model;

[0017] Figure 3 It is the structure sectional view of the locking seat in the utility model;

[0018] Figure 4 It is the structure explosion map of the sliding block and the elastic piece in the utility model.

[0019] In the drawing: 1, inner tube; 11, clamping groove; 12, second radial through hole; 2, outer tube; 21, positioning hole; 3, locking seat; 31, cavity; 32, sliding groove; 33, sliding block; 34, positioning pin; 35, elastic piece; 36, pulley; 37, traction rope; 39, first radial through hole; 310, first end; 311, second end; 312, groove; 313, buckle block; 314, seat body; 315, first guide groove; 316, first guide rail; 317, second guide groove; 318, mounting hole; 319, positioning column; 4, limiting groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art belong to the scope of protection of the utility model.

[0021] The utility model discloses an inner tube 1 and coaxial sleeve set up the outer tube 2 outside inner tube 1, inner tube 1 and outer tube 2 are all circular tube structure, be equipped with locking seat 3 between inner tube 1 and outer tube 2, locking seat 3 fixedly connected at the one end of inner tube 1 inside outer tube 2, locking seat 3 is cylindrical structure, locking seat 3 has cavity 31 inside, cavity 31 is along the radial of inner tube 1 and is equipped with sliding groove 32, sliding block 33 is connected in sliding groove 32, that is, sliding block 33 reciprocating sliding along the radial of locking seat 3, the one end of radial of sliding block 33 is fixed with positioning pin 34, positioning pin 34 moves along with sliding block 33, the other end of radial of sliding block 33 and cavity 31 are equipped with elastic piece 35, pulley 36 is also rotationally arranged in cavity 31, pulley 36 and positioning pin 34 are located respectively at the both ends position of elastic piece 35.

[0022] Sliding block 33 is fixed with traction rope 37, in the embodiment, traction rope 37 is steel wire, one end of traction rope 37 is connected to the central position of the end of sliding block 33 with elastic piece 35, the other end is after passing pulley 36 and extends to the outside along the inner tube 1 inside axial as the force end,

[0023] By pulling the force applying end of the traction rope 37, the traction rope 37 is in a taut state, so only a slight pulling of the traction rope 37 is needed, the traction rope 37 pulls the sliding block 33 along the pulley, the sliding block 33 slides against the elastic member 35, in this embodiment, the elastic member 35 is a spring, the sliding block 33 compresses the spring under the pulling of the traction rope 37, the sliding block 33 moves to retract the positioning pin 34.

[0024] It should be noted that the force applying end of the traction rope 37 can extend axially to the other end of the inner tube 1, or extend to one side of the inner tube 1, a manual trigger switch is arranged on the side of the inner tube 1, the traction rope 37 is connected to the manual trigger switch, the traction rope 37 is pulled by manually pressing the manual trigger switch, the manual trigger switch is a common transmission structure, which will not be described here.

[0025] When the force applying end of the traction rope 37 is applied, the traction rope 37 pulls the sliding block 33 along the pulley 36, the pulley 36 changes the direction of the traction rope 37 and makes the pulling more labor-saving, the sliding block 33 slides against the elastic member 35, and further retracts the positioning pin 34; when the driving force of the force applying end is removed, the sliding block 33 reversely slides under the restoring force of the elastic member 35, and further extends the positioning pin 34,

[0026] The circumferential wall of the locking seat 3 is provided with a first radial through hole 39 for the extension and retraction of the positioning pin 34, the inner tube 1 is provided with a second radial through hole 12 at the corresponding position, so that the positioning pin 34 can extend and retract along the first radial through hole 39 and the second radial through hole 12, the outer tube 2 is provided with a plurality of positioning holes 21 arranged in a straight line along the axial direction, when the positioning pin 34 is in the retracted state, the outer tube 2 and the inner tube 1 can slide axially relative to each other, that is, the telescopic tube can adjust the length; when the positioning pin 34 is in the extended state, the positioning pin 34 extends through the second radial through hole 12 into the positioning hole 21 to form positioning with the positioning hole 21, at this time, the outer tube 2 and the inner tube 1 are locked, since a plurality of positioning holes 21 form different gears, that is, the telescopic tube adjusts the length and then is locked.

[0027] It should be noted that the sliding block 33 is in one side under the elastic force of the spring in the normal state, that is, the positioning pin 34 is in the normal extended state, that is, the inner tube 1 and the outer tube 2 are in the normal locked state, when the length needs to be adjusted, the traction rope 37 can be pulled.

[0028] Further, the locking seat 3 includes a first end 310 and a second end 311, the outer diameter of the first end 310 is smaller than the outer diameter of the second end 311, that is, the first end 310 and the second end 311 form a stepped surface, the inner tube 1 is sleeved on the first end 310, and the outer tube 2 is sleeved on the second end 311 and the inner tube 1.

[0029] Further, the outer peripheral wall of the first end 310 is provided with symmetrically distributed grooves 312, the inner wall of the groove 312 extends out a buckle block 313 with elastic deformation, in the embodiment, since the positioning seat is a plastic structure, the buckle block 313 is also a plastic structure, one end of which is integrally connected with the inner wall of the groove 312, and the other end is in a suspended state, thus forming the buckle block 313 with elastic deformation, the peripheral wall of the inner tube 1 is provided with a clamping groove 11, after the inner tube 1 is sleeved with the first end 310, the buckle block 313 is clamped in the clamping groove 11 to form a limit, so that the first end 310 and the inner tube 1 are fixedly connected with each other in a detachable manner, which is not only simple in structure, but also convenient to assemble and disassemble.

[0030] Further, the locking seat 3 is formed by buckling and splicing two seat bodies 314 radially, that is, the cylindrical locking seat 3 is cut in half along the axial cross section, the two seat bodies 314 are each provided with a cavity, and the two seat bodies 314 are spliced to form a complete cavity 31. It should be noted that the cavity 31 is divided into independent cavities 31 by guide ribs for installing the pulley 36 and the sliding block 33, so as to avoid interference and ensure the stability of the sliding of the pulley 36 and the sliding block 33. The edges of the two seat bodies 314 are each provided with a half hole structure, and the two seat bodies 314 are spliced to form a complete first radial through hole 39.

[0031] Further, one side surface of the sliding block 33 is provided with a first guide groove 315, and the inner wall of the cavity 31 of the locking seat 3 is provided with a first guide rail 316 in sliding cooperation with the first guide groove 315. The opposite side surface of the sliding block 33 is provided with a second guide rail, and the inner wall of the cavity 31 of the locking seat 3 is provided with a second guide groove 317 in sliding cooperation with the second guide rail, so that the opposite sides of the sliding block 33 are both in sliding connection with the inside of the cavity 31, and the sliding of the sliding block 33 is more stable.

[0032] Further, one end of the sliding block 33 is provided with a mounting hole 318, and the central part of the mounting hole 318 is provided with a positioning column 319. The elastic member 35 is a spring, one end of the spring is located in the mounting hole 318 and is sleeved on the positioning column 319, so that the spring can be stably installed in the mounting hole 318, and the stability of the spring in extension and contraction is improved.

[0033] Further, the inner tube 1 and the outer tube 2 are both circular tube structures, and the inner tube 1 and the outer tube 2 are provided with an axially extending limiting groove 4 on the side where the positioning pin 34 is located. The second radial through hole 12 and the positioning hole 21 are both located in the corresponding limiting groove 4, so that the positioning pin 34 is hidden in the limiting groove 4 and does not interfere with the sleeving connection between the inner tube 1 and the outer tube 2, and at the same time, the inner tube 1 and the outer tube 2 form radial limiting between them to prevent the inner tube 1 and the outer tube 2 from rotating relative to each other.

[0034] The utility model is not limited to the above best implementation, and any person can draw other various forms of products under the enlightenment of the utility model, but no matter any change in its shape or structure, all the technical schemes with same or similar to the application fall in the protection scope of the utility model.

Claims

1. A telescopic pole, characterized in that, The utility model relates to a locking device for coaxial pipe, including inner tube (1) and coaxial sleeve set in outer tube (2) outside inner tube (1), be equipped with locking seat (3) between inner tube (1) and outer tube (2), locking seat (3) fixed connection in the one end of inner tube (1) inside outer tube (2), locking seat (3) inside has the cavity (31), the sliding slot (32) of cavity (31) is opened along the radial direction of inner tube (1), sliding block (33) is slidably connected in sliding slot (32), the radial direction one end of sliding block (33) is equipped with the positioning pin (34), the positioning pin (34) moves along with sliding block (33), the radial direction other end between sliding block (33) and cavity (31) is equipped with elastic element (35), the pulley (36) is also rotatably arranged in the cavity (31), the pulley (36) and positioning pin (34) are located respectively at the both ends position of elastic element (35), Sliding block (33) is fixed with traction rope (37), one end of traction rope (37) is connected to the end of sliding block (33) and abuts against elastic element (35), the other end is extended as the force end along the axial direction of inner tube (1) after passing through the pulley (36), When the force end of traction rope (37) is driven and traction rope (37) is pulled, traction rope (37) pulls sliding block (33) along the pulley (36), so that sliding block (33) compresses elastic element (35) and slides, further drive the positioning pin (34) to contract, when the driving force of the force end is removed, sliding block (33) reversely slides under the action of the restoring force of elastic element (35), further drive the positioning pin (34) to extend, The first radial hole (39) for the extension and contraction of the positioning pin (34) is arranged on the peripheral wall of the locking seat (3), the second radial hole (12) is arranged on the inner tube (1) at the corresponding position, so that the positioning pin (34) can perform the extension and contraction action along the first radial hole (39) and the second radial hole (12), a plurality of positioning holes (21) distributed in a straight line are arranged on the outer tube (2) along the axial direction, when the positioning pin (34) is in the contracted state, the outer tube (2) and the inner tube (1) can slide axially relative to each other, when the positioning pin (34) is in the extended state, the positioning pin (34) extends into the positioning hole (21) through the second radial hole (12) and forms positioning with the positioning hole (21), at this time, the outer tube (2) and the inner tube (1) are locked.

2. A telescopic rod according to claim 1, characterized in that The locking seat (3) includes a first end (310) and a second end (311), the outer diameter of the first end (310) is smaller than the outer diameter of the second end (311), the inner tube (1) is sleeved on the first end (310), and the outer tube (2) is sleeved on the second end (311) and the outer tube (1).

3. A telescopic rod according to claim 2, wherein, The outer peripheral wall of the first end (310) is provided with symmetrically distributed grooves (312), the inner wall of the groove (312) extends out a buckle block (313) with elastic deformation, the peripheral wall of the inner tube (1) is provided with a clamping groove (11), after the inner tube (1) is sleeved with the first end (310), the buckle block (313) is clamped in the clamping groove (11) to form limiting, so that the first end (310) and the inner tube (1) are fixed with each other.

4. A telescopic rod according to claim 3, wherein The locking seat (3) is clamped and spliced by two seat bodies (314) radially halved, the cavities are formed in the two seat bodies (314), the cavities of the two seat bodies (314) form a complete cavity (31) after splicing, the edges of the two seat bodies (314) are provided with half hole structures, and the two seat bodies (314) form a complete first radial through hole (39) after splicing.

5. A telescopic rod according to claim 1, characterized in that The side surface of the sliding block (33) is provided with a first guide groove (315), and the inner wall of the cavity (31) of the locking seat (3) is provided with a first guide rail (316) in sliding fit with the first guide groove (315).

6. A telescopic rod according to claim 5, wherein, The opposite side surface of the sliding block (33) is provided with a second guide rail, and the inner wall of the cavity (31) of the locking seat (3) is provided with a second guide groove (317) in sliding fit with the second guide rail.

7. A telescopic rod according to claim 1, characterized in that One end of the sliding block (33) is provided with a mounting hole (318), the central part of the mounting hole (318) is provided with a positioning column (319), the elastic member (35) is a spring, one end of the spring is located in the mounting hole (318) and is sleeved on the positioning column (319).

8. A telescopic rod according to claim 1, characterized in that The inner tube (1) and the outer tube (2) are both circular tube structures, the inner tube (1) and the outer tube (2) are provided with an axially extending limiting groove (4) on the side where the positioning pin (34) is located, and the second radial through hole (12) and the positioning hole (21) are both located in the corresponding limiting groove (4).

Images