CN201034101Y

CN201034101Y - Extension locating means for extension arm

Info

Publication number: CN201034101Y
Application number: CNU2007201080780U
Authority: CN
Inventors: 毛一兵
Original assignee: NINGBO SHUANGYOU PLASTIC PRODUCTS CO Ltd
Current assignee: NINGBO SHUANGYOU PLASTIC PRODUCTS CO Ltd
Priority date: 2007-04-12
Filing date: 2007-04-12
Publication date: 2008-03-12
Anticipated expiration: 2017-04-12

Abstract

The utility model relates to a telescopic positioning device for a telescopic link, comprising a connecting sleeve (3), a compressed spiral spring (4) and a positioning ring (5), wherein the connecting sleeve (3) is fixedly connected with the top of an outer tube (1) of the telescopic link; the upper end of the compressed spiral spring (4) is limited on the inner shoulder of the connecting sleeve (3) for enabling the positioning ring (5) with a continuous downward move trend; the inner diameter of the positioning ring (5) is slightly bigger than the outer diameter of an inner pipe (2); a switch button (51) and a projection (52) are arranged at the outer side of the positioning ring (5); the connection sleeve (3) is provided with a longitudinal groove (31), in which the switch button (52) extends out and moves along the stop groove (31) for up and down limit move; the projection (52) on the positioning ring (5) is chucked in a hole (32) on the connecting sleeve (3). After one end of the positioning ring inclines downwards to contact to the inner pipe, the inner pipe can be positioned relatively to the outer pipe; the inner pipe can move freely just through triggering one end of the positioning ring. The utility model has the advantages of very simple and convenient operation and simple structure.

Description

A kind of telescopic positioning device of flexible rod

Technical field

The utility model relates to the technical field of flexible rod, is meant a kind of telescopic positioning device of flexible rod especially.

Background technique

Flexible rod be because of can regulating the overall length of pole according to actual needs at any time, and can at present, be widely applied among the daily life, such as being used for clothes hanger, strut or the like in a certain length location.Generally, pipe and sheathed its outer outer tube in simple flexible rod comprises, between the two by being threaded, regulating the relative outer tube of interior pipe by screw-thread fit rises or descends, stop to relatively rotate and to locate by screw thread, but the interlock fastness between the screw thread is not high enough, and vertically painstaking when big when interior pipe or outer tube, screw thread is very easy to damage, and influences the use of flexible rod, and, by the height of screw thread rotation adjusting flexible rod, interior pipe or outer tube need relative body of wall to rotate, and this will cause itself and body of wall that constantly friction takes place, damage body of wall or flexible rod itself, not too practical.At present, also there are some fixing comparatively firm flexible rods to be invented, disclose a solution as " a kind of retractable supports push rod " (notification number is CN2653046Y) of Chinese utility model patent ZL03207743.2.This flexible rod, telescopic upper and lower casing coupling is set respectively outside interior pipe and outer tube, and on last casing coupling, is connected with handle, fix with following casing coupling after pushing downwards by handle, and the relative outer tube of interior pipe is fixed, thereby make flexible rod be positioned at a certain length.This flexible rod, owing to need be located by the operation of handle, the movable amplitude that operates is big, and relatively requires great effort, and parts are also more, the handle component of increase can improve manufacture cost undoubtedly.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of positioning action simple, the light telescopic positioning device that is used for flexible rod at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: the telescopic positioning device of this flexible rod, it is characterized in that it includes coupling sleeve, compression helical spring and positioning ring, wherein, coupling sleeve is fixed in the outer tube top of flexible rod, from bottom to top be provided with described positioning ring and compression helical spring in it successively, make described positioning ring have the trend that moves down all the time thereby the upper end of compression helical spring is limited in the interior shoulder of coupling sleeve; The interior pipe of flexible rod promptly by the upper end inserting of described coupling sleeve in described positioning ring, compression helical spring and outer tube, and can move up and down with respect to outer tube; The external diameter of pipe in the internal diameter of positioning ring is slightly larger than, its arranged outside has the switch button of outside protrusion and the bump relative with this switch button; Have restraining groove longitudinally on the barrel of coupling sleeve, described switch button promptly exposes by this restraining groove and can be moving along this restraining groove upper and lower displacement, also has aperture on the barrel of coupling sleeve, and the bump on the described positioning ring promptly is fastened in this aperture.

Like this, compression helical spring just is against between interior shoulder of coupling sleeve and the positioning ring, and positioning ring is fastened among the aperture of coupling sleeve because of the bump of an end, under the state of nature, the other end that it is relative, it is this end of switch button of positioning ring, owing to the conflict effect of compression helical spring has downward-sloping trend, at this moment, positioning ring is internally pipe inclination mutually, and interior pipe will come in contact with the inboard of positioning ring, pipe relative positioning circle was static in frictional force by between the two made, so just realized the motionless purpose in interior pipe relative outer tube location, and when pipe in the needs is gone up the lower outer pipe activity relatively, the switch button of positioning ring has upwards been stirred by external force, at this moment, will there be the gap in interior pipe with positioning ring and come in contact, and removes the surface friction drag of the internal pipe of positioning ring, thereby pipe is free to up and down in making.

For ease of being connected and fixed of described coupling sleeve and outer tube top, the top of described outer tube can be provided with connecting base, this connecting base top is the intubate of inserting within described coupling sleeve, the bottom has a circle boss, this boss extends upward the formation convex tendon in the position of the described coupling sleeve upper limit position groove of correspondence, and this convex tendon dual-side is provided with flange, and is corresponding, has the breach that is embedded for the connecting base upper flange on the restraining groove of described coupling sleeve; Like this, in compression helical spring and positioning ring are set in outside the pipe after, coupling sleeve is sheathed outside it, make the convex tendon of the restraining groove aligning outer tube top upper connecting base on the coupling sleeve, inserting and make flange on the convex tendon just in time be embedded into breach on the restraining groove then can make the firm top that is connected outer tube of coupling sleeve.

Wherein, for ease of production and processing, described connecting base can be independent parts, is fixed on the top of outer tube by screw.

For guaranteeing that the positioning ring side can obtain the conflict power of compression helical spring all the time, can also be provided with packing ring between described compression helical spring and the positioning ring.

Compared with prior art, advantage of the present utility model is: compression helical spring and positioning ring and coupling sleeve are set outside interior pipe, come in contact with interior pipe afterwards by positioning ring one end is downward-sloping, and the relative outer tube of pipe location in making, when needs are flexible, as long as upwards stir an end of positioning ring, remove the surface friction drag of positioning ring and interior pipe, pipe is free movable in just can making, it is very simple to operate, light, inner and outer pipes also will not rub with body of wall, avoids body of wall is caused damage, and the utility model design is ingenious, simple in structure, be easy to apply.

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation (broken section);

Fig. 2 for the switch button of positioning ring among the utility model embodiment by the structural representation (broken section) after upwards stirring;

Fig. 3 is the utility model embodiment's a three-dimensional exploded view.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1～shown in Figure 3, the telescopic positioning device of this flexible rod, it includes coupling sleeve 3, compression helical spring 4, positioning ring 5 and packing ring 6, pipe 2 and be set in its outer outer tube 1 in flexible rod then comprises, in this pipe 2 relatively outer tube 1 move up and down;

Wherein, have restraining groove 31 longitudinally on the barrel of described coupling sleeve 3, this coupling sleeve 3 is fixed in outer tube 1 top of flexible rod by connecting base 7, from bottom to top be provided with described positioning ring 5, packing ring 6 and compression helical spring 4 in it successively, make positioning ring 5 have the trend that moves down all the time thereby the upper end of compression helical spring 4 is limited in the interior shoulder of coupling sleeve 3;

The top of described outer tube 1 has been screwed connecting base 7, this connecting base 7 is independent parts, its top is the intubate 71 of inserting within coupling sleeve 3, the bottom has a circle boss 72, this boss 72 extends upward in the position of corresponding coupling sleeve 3 upper limit position grooves 31 and forms convex tendon 73, and these convex tendon 73 dual-sides are provided with flange 73a, and are corresponding, have the breach 31a that is embedded for connecting base 7 upper flange 73a on the restraining groove 31 of coupling sleeve 3;

The interior pipe 2 of described flexible rod promptly by the upper end inserting of coupling sleeve 3 in positioning ring 5, compression helical spring 4 and outer tube 1, and can move up and down with respect to outer tube 1;

The external diameter of pipe 2 in the internal diameter of described positioning ring 5 is slightly larger than, switch button 51 that its arranged outside has an outside protrusion and the bump 52 relative with this switch button 51, this switch button 51 i.e. restraining groove 31 by coupling sleeve 3 exposes and can be moving along these restraining groove 31 upper and lower displacements, also have aperture 32 on the barrel of coupling sleeve 3, the bump 52 on the positioning ring 5 promptly is fastened in this aperture 32.

Pipe 2 in twitching, when regulating length of telescopic bar, upwards stir the switch button 51 of positioning ring 5, overcome the pretightening force of 4 pairs of positioning rings 5 of compression helical spring, at this moment, in pipe 2 will have the gap and do not come in contact with positioning ring 5, removed the surface friction drag of pipe 2 in 5 pairs of the positioning rings, thus in making pipe 2 outer tube 1 is up and down freely relatively; After adjusting needed length of telescopic bar, bleed off the switch button 51 of positioning ring 5, positioning ring 5 is owing to the effect of compression helical spring 4 makes it have the trend that moves down, this moment, positioning ring 5 was internally managed 2 inclinations mutually, interior pipe 2 will come in contact with the inboard of positioning ring 5, pipe 2 relative positioning circles 5 were static in frictional force by between the two made, and pipe 2 relative outer tubes 1 fixedly positioning in realizing.

Claims

1. the telescopic positioning device of a flexible rod, it is characterized in that it includes coupling sleeve (3), compression helical spring (4) and positioning ring (5), wherein, coupling sleeve (3) is fixed in outer tube (1) top of flexible rod, from bottom to top be provided with described positioning ring (5) and compression helical spring (4) in it successively, the upper end of compression helical spring (4) be limited in coupling sleeve (3) thus interior shoulder make described positioning ring (5) have the trend that moves down all the time; The interior pipe (2) of flexible rod promptly by the upper end inserting of described coupling sleeve (3) in described positioning ring (5), compression helical spring (4) and outer tube (1), and can move up and down with respect to outer tube (1); The internal diameter of described positioning ring (5) is slightly larger than the external diameter of interior pipe (2), and its arranged outside has the switch button (51) of outside protrusion and the bump (52) relative with this switch button (51); Have restraining groove (31) longitudinally on the barrel of coupling sleeve (3), described switch button (51) promptly exposes by this restraining groove (31) and can be moving along this restraining groove (31) upper and lower displacement, also have aperture (32) on the barrel of coupling sleeve (3), the bump (52) on the described positioning ring (5) promptly is fastened in this aperture (32).

2. the telescopic positioning device of flexible rod according to claim 1, it is characterized in that: the top of described outer tube (1) is provided with connecting base (7), this connecting base (7) top is the intubate (71) of inserting within described coupling sleeve (3), the bottom has a circle boss (72), this boss (72) extends upward in the position of the described coupling sleeve of correspondence (3) upper limit position groove (31) and forms convex tendon (73), and this convex tendon (73) dual-side is provided with flange (73a), accordingly, have the breach (31a) that is embedded for connecting base (7) upper flange (73a) on the restraining groove (31) of described coupling sleeve (3).

3. the telescopic positioning device of flexible rod according to claim 2, it is characterized in that: described connecting base (7) is independent parts, is fixed on the top of outer tube (1) by screw (8).

4. according to the telescopic positioning device of the described flexible rod of the arbitrary claim of claim 1 to 3, it is characterized in that: also be provided with packing ring (6) between described compression helical spring (4) and the positioning ring (5).