CN2641433Y

CN2641433Y - Device for locking telescopic leg

Info

Publication number: CN2641433Y
Application number: CN 03271867
Authority: CN
Inventors: 李丽华
Original assignee: XIANGWANG OPTICAL ELECTRON ARTICLE CO Ltd NANHAI DISTRI FOSHAN CITY
Current assignee: XIANGWANG OPTICAL ELECTRON ARTICLE CO Ltd NANHAI DISTRI FOSHAN CITY
Priority date: 2003-07-01
Filing date: 2003-07-01
Publication date: 2004-09-15
Anticipated expiration: 2013-07-01

Abstract

The utility model relates to a locking device for a telescoping pipe foot, which comprises at least one group of upper pipe and lower pipe. The lower pipe is inserted in the upper pipe, and the lower end the upper pipe has a tail sleeve used for preventing the lower pipe to fall. A guide rod which only can slide in an axial manner is positioned in the upper pipe, and a locking block is sleeved on the guide rod, and the locking block can be expanded to distort by pressing extrusion. The end part of the lower pipe is fixedly provided with a connecting mat which can press the locking block. The center of the connecting mat is provided with a screw hole, and the lower part of the guide rod is correspondingly provided with outer thread and is in a thread connecting with the connecting mat. The design has the advantages that: the telescoping for the pipe foot is free, and the locking is firm and reliable, and folding can not affect the appearance, and the utility model has long service life and low manufacturing cost.

Description

A kind of flexible pin locking device

Technical field

The utility model relates to the foot rest mechanism of photographic goods, telescope etc., and the pin pipe locking device of the foot rest of more piece pin pipe is particularly arranged.

Background technique

The pin pipe connecting part locking device of traditional foot rest that more piece pin pipe is arranged is plate and buckles, and executes the pin pipe that the inside is less and compresses by pulling button, thereby the pin pipe is fixed, and not flexible is for the use of various functions.This constructional device is the outside of being located at the pin pipe, can cause the volume of product to increase, and is unfavorable to outward appearance.Have again through after repeatedly using, pull button and have wearing and tearing, thereby the suffered pressure of pulling in the button of briquetting is reduced, the coupling mechanism force of pin pipe is reduced, the fastening force of pin pipe is also being reduced, in the course of time, will lose efficacy the locking of pin pipe.

The model utility content

The purpose of this utility model is the deficiency that overcomes conventional construction, propose a kind of easy to assembly, capable of expansion and contraction, reliable lock, the flexible pin locking device of long service life.

The technical solution of the utility model is: a kind of flexible pin locking device, include at least one group of top tube and down tube, following pipe box inserts in the pipe, there is the tail cover that prevents down that pipe breaks away from last pipe lower end, the guide rod that is in axial sliding only is housed in the last pipe, and the guide rod upper sleeve through has the locking block of the dilatancy that can be squeezed; The end of following pipe is fixed with the connection pad that can push locking block, and the connection pad center has screw, and the bottom correspondence of guide rod has outside thread and spins with the connection pad screw.Further, lead muscle on the inwall of last pipe, the bar head of guide rod and locking block outer wall all have the guide groove corresponding with leading muscle, and guide rod and locking block insert in the pipe along leading the muscle cover, and the head of connection pad is taper type, and the lower inner wall of locking block has corresponding with it frustum hole.For forming multi-joint telescoping, following inner tube wall is led muscle equally, but suit guide rod and locking block, with the socket of next stage pin.

Such structure has the following advantages:

1, part mostly is molding and forming, and requirement on machining accuracy is not high, and is simpler in production and processing, is easy to controlling performance, and cost is low.

2, fastening between pin is to expand by locking block, and finishes in the inner tube wall on the stretching, so its working life is longer, is difficult for losing efficacy, and can guarantee security of products preferably, and product can make down pipe capable of expansion and contraction, can fix in any one length, conveniently use.

3, easy to assembly, do not need special device, can finish the assembling of such infrastructure product with assembly tool commonly used.

4, simple in structure, reliable in function, multipurpose, total are all inserted in the pipe, sincerely have the tail cover to expose, and do not influence outward appearance.

Description of drawings

Fig. 1 is an assembly structure schematic representation of the present utility model;

Fig. 2 is a three-dimensional partition schematic representation of the present utility model.

Embodiment

Referring to Fig. 1, Fig. 2, the flexible pin locking device of present embodiment mainly by last pipe 1, manage 2 down, guide rod 3, locking block 4, connection pad 5, tail cover 6 constitute, wherein down pipe 2 can overlap to insert and goes up in the pipe 1, and go up pipe 1 inwall form three connect total lengths lead muscle 11, down manage 2 inwalls form three connect total lengths lead muscle 21; Have on the bar head of guide rod 3 with last pipe 1 in lead the corresponding guide groove 31 of muscle 11, the bottom of guide rod 3 has external screw thread 32; Locking block 4 is a hollow distortion cylinder, and central authorities have the center hole 41 with guide rod 3 sockets, and outer wall has distortion groove 42 and guide groove 43 respectively, and the lower end inwall forms frustum hole 44; Connection pad 5 tops are taper type, and with frustum hole 44 corresponding matching of locking block 4 bottoms, outer wall then has with following pipe 2 inwalls leads the corresponding guide groove 51 of muscle 21, and the center of connection pad 5 has screw 52, external screw thread 32 corresponding rotation of screw 52 and guide rod 3.

Its connection procedure is that connection pad 5 is loaded on down on the pipe 2, and some glue or be fixed with screw; Guide rod 3 is passed locking block 4, and the thread 32 of guide rod 3 is screwed in the screw 52 of connection pads 5, can not screw; Again the guide groove on the guide rod 3 31 is alignd with guide groove 43 on the locking block 4, lead muscle 11

good guide groove

31,43 being aimed at go up on pipe 1 inwall then, the above-mentioned assembly that installs is inserted go up in the pipe 1; And with tail cover 6 under manage 2 ends and load onto, be enclosed within on the pipe 1, some glue or tail cover 6 is fixed on screw is managed on 1, has promptly finished the assembling of this structure.Because of tail cover 6 is fixed on the pipe 1, the external diameter of connection pad 5 is greater than the termination internal diameter of tail cover 6, so pipe 2 can not break away from from last pipe 1 down.When holding pipe 1, forward screws off pipe 2 o'clock, because of there being groove to cooperate on the guide rod 3 with the muscle 11 of leading of last inner tube wall, so and then pipe 2 rotations down of guide rod 3, therefore guide rod 3 threads 32 can screw in the screw 52 of connection pad 5, simultaneously, the taper type head of connection pad 5 can enter the frustum hole 44 of locking block 4 bottoms, make the distortion groove 42 of locking block 4 that deformation take place, and outwards support is big, the distortion of locking block 4 outer walls and the inwall of last pipe 1 is close to, when dynamics is enough, following pipe then can not slide in last pipe, reaches the purpose of relative position locking.

Certainly, only enumerate a kind of preferable instantiation here, other are equal to the protection domain that roughly the same structure all should belong to this patent, repeat no more here.

Claims

1, a kind of flexible pin locking device, include at least one group of top tube and down tube, following pipe box inserts in the pipe, on manage the lower end tail cover that prevents down that pipe breaks away from arranged, it is characterized in that: go up in the pipe guide rod that is in axial sliding only is housed, the guide rod upper sleeve through has the locking block of the dilatancy that can be squeezed; The end of following pipe is fixed with the connection pad that can push locking block, and the connection pad center has screw, and the bottom correspondence of guide rod has outside thread and spins with the connection pad screw.

2, pin locking device according to claim 1 is characterized in that leading muscle on the inwall of pipe, and the bar head of guide rod and locking block outer wall all have the guide groove corresponding with leading muscle, and guide rod and locking block insert in the pipe along leading the muscle cover.

3, pin locking device according to claim 1 and 2 is characterized in that the head of connection pad is taper type, and the lower inner wall of locking block has corresponding with it frustum hole.

4, pin locking device according to claim 2 is characterized in that inner tube wall is led muscle equally down, but suit guide rod and locking block, with the socket of next stage pin.