CN203248477U

CN203248477U - Connection structure of stretchy rod

Info

Publication number: CN203248477U
Application number: CN 201320108784
Authority: CN
Inventors: 郑明德
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-11
Filing date: 2013-03-11
Publication date: 2013-10-23
Anticipated expiration: 2023-03-11

Abstract

The utility model discloses a connection structure of a stretchy rod. The connection structure of the stretchy rod comprises at least two stretchy pipes which are connected mutually in an inserted mode, and an elastic piece is arranged in the gap between every two adjacent stretchy pipes. The stretchy rods on the inner side are provided with small holes corresponding to the elastic pieces, and the elastic pieces protrude inwards and are clamped into the small holes. Each stretchy pipe comprises at least one cylinder face and a positioning face, wherein the cylinder face and the positioning face are positioned in different curve faces. The cylinder face and the positioning face of each rear stretchy pipe are matched with the cylinder face and the positioning face of each front stretchy pipe respectively. Outer protruded rings are arranged on the walls from the second stretchy pipe to the last stretchy pipe, and the tail ends of all the stretchy pipes are provided with position clamping portions. According to the connection structure of the stretchy rod, the stretchy pipes are made to be of incomplete cylindrical tube-shaped structures, and in addition, the outer protruded rings, inner protruded rings and flanges are arranged on the pipe walls, wherein the outer protruded rings, the inner protruded rings and the flanges have limiting and stabilizing functions. Thus, all the stretchy pipes are not prone to being pulled out and disengaging, can not rotate and can reduce wobbling, and normal use of the stretchy rod is ensured.

Description

A kind of flexible rod linkage structure

Technical field

The utility model relates to and a kind ofly interconnects the rear flexible rod linkage structure that can stretch or shrink that forms by multiple-segment telescopic tube.

Background technique

Present employed more piece is interconnected to form the flexible rod that can stretch or shrink, and such as antenna, teaching indicating bar etc., its basic structure is to rely on a shell fragment that is connected in its gap that two joint telescopic pipes can be interconnected between the adjacent expansion pipe.Because each joint telescopic pipe is cylindrical tubular structure, and is identical before and after the diameter of pipe, and the external diameter of the internal diameter of last telescopic pipe and a rear telescopic pipe is complementary, a telescopic pipe can insert in the last telescopic pipe after making.Yet easily make long afterwards service time telescopic pipe produce wearing and tearing at flexible rod, and it is firmly excessive to stretch, all easily makes telescopic pipe produce obscission, cause flexible rod impaired, and between the telescopic pipe owing to existing the gap can produce certain rocking, impact is normally used.In addition, because telescopic pipe is cylindrical tubular structure, so that telescopic pipe can rotate, also can affect the normal use of flexible rod.

The model utility content

The technical problems to be solved in the utility model provides a kind of stabilized structure, connects flexible rod linkage structure reliable, reasonable in design.

For solving the problems of the technologies described above, the utility model adopts following technological scheme: a kind of flexible rod linkage structure, comprise the telescopic pipe that at least two joints are pegged graft mutually, be provided with shell fragment in the gap between the adjacent expansion pipe, inboard telescopic pipe is provided with the aperture corresponding with shell fragment, the shell fragment inwardly protruding is stuck in the aperture, it is characterized in that: described telescopic pipe include at least one cylndrical surface and one and this cylndrical surface be in the locating face of different curve, be that the telescopic pipe agent structure still is cylindrical, its surperficial at least one side blow swaging is become to differ from inner concave or the outer convex surface of cylndrical surface, the cylndrical surface of a rear telescopic pipe and locating face respectively with cylndrical surface and the locating face of last telescopic pipe be complementary (first segment is the telescopic pipe of diameter maximum, and minor details are the telescopic pipe of diameter minimum); The front end of each telescopic pipe is provided with enlarging, and the diameter of enlarging is greater than the diameter of this section telescopic pipe, less than the diameter of a rear joint telescopic pipe, and one saved in the telescopic pipe after it can stretch into; The tail end of each telescopic pipe is equipped with screens section, is provided with the deformable flexible circle in the gap between adjacent two telescopic pipes, and one side of flexible rings withstands on the screens section of telescopic pipe during stretching.

Be equipped with outer bulge loop on the tube wall of the extremely minor details telescopic pipe of second section telescopic pipe, screens section is corresponding with outer bulge loop.

Further, described locating face is plane or arc surface, and arc surface can be convex arc surface or concaved circular cambered surface.

Further, described screens section is that closing in or the turnover of telescopic pipe tail end tube wall that the inside bending of the telescopic pipe tail end mouth of pipe forms forms the in-flanges of being close to the telescopic pipe inwall, the telescopic pipe of back can not redraw after outer bulge loop is run into in-flanges when stretching, in-flanges can also reduce the gap between the adjacent expansion pipe, can play a part spacing and firm.

The inwall of telescopic pipe is provided with internal projecting ring, and internal projecting ring is positioned at the shell fragment back, and internal projecting ring can prevent that the telescopic pipe of back from directly clashing into the shell fragment part that snaps in respective apertures when shrinking.

Described outer bulge loop becomes 0-20 degree angles by the side of telescopic pipe tail end one side with the telescopic pipe cross section.

The utility model is by making telescopic pipe the structure of non-complete cylindrical, and outer bulge loop and the in-flanges of the spacing and firm function of tool are set at tube wall, come off thereby make neither easily to pull out between each telescopic pipe, also can not rotate, and can reduce to rock, guarantee the normal use of flexible rod.

Description of drawings

Fig. 1 is the utility model extended state structural representation;

Fig. 2 is telescopic pipe cross-sectional structure schematic diagram;

Fig. 3 is the utility model contraction state longitudinal profile structural representation.

Among the figure, 1 is telescopic pipe, and 2 is locating face, and 3 is the cylndrical surface, and 4 is shell fragment, and 5 is aperture, and 6 is outer bulge loop, and 7 is the gap, and 8 are screens section, and 9 are enlarging, and 10 is flexible rings, and 11 is internal projecting ring.

Embodiment

In the present embodiment, with reference to Fig. 1, Fig. 2 and Fig. 3, described flexible rod linkage structure, the telescopic pipe 1 that comprises mutual grafting, be provided with shell fragment 4 in the gap 7 between the adjacent expansion pipe 1, inboard telescopic pipe is provided with the aperture 5 corresponding with shell fragment 4, and shell fragment 4 inwardly protrudings are stuck in the aperture 5; Described telescopic pipe 1 includes the locating face 2 that two cylindrical surface 3 and two places and this cylndrical surface 3 are in different curve, be that telescopic pipe 1 agent structure still is cylindrical, its surperficial at least one side blow swaging is become to differ from inner concave or the outer convex surface of cylndrical surface, the cylndrical surface of a rear telescopic pipe and locating face respectively with cylndrical surface and the locating face of last telescopic pipe be complementary (first segment is the telescopic pipe of diameter maximum, and minor details are the telescopic pipe of diameter minimum); The front end of each telescopic pipe 1 is provided with enlarging 9, and the diameter of enlarging 9 is greater than the diameter of this section telescopic pipe, less than the diameter that a rear joint shrinks, and one saved in the telescopic pipe after it can stretch into; The tail end of each telescopic pipe 1 is equipped with screens section 8, is provided with deformable flexible circle 10 in the gap between adjacent two telescopic pipes, and one side of flexible rings 10 withstands on the screens section 8 of telescopic pipe during stretching.

The second section telescopic pipe is equipped with outer bulge loop 6 to the tube wall of minor details telescopic pipe, screens section 8 is corresponding with outer bulge loop 6.

Locating face 2 is the plane, can certainly be arc surface, and arc surface can be convex arc surface or concaved circular cambered surface.

Described screens section 8 forms the in-flanges (can certainly be the closing in that is converted into) of being close to the telescopic pipe inwall for the turnover of telescopic pipe 1 tail end tube wall, the telescopic pipe of back can not redraw after outer bulge loop 6 is run into in-flanges when stretching, in-flanges can also reduce the gap between the adjacent expansion pipe, can play a part spacing and firm.

The inwall of telescopic pipe 1 is provided with internal projecting ring 11, and internal projecting ring 11 is positioned at shell fragment 4 back, and internal projecting ring 11 can prevent that the telescopic pipe of back from directly clashing into the shell fragment part that snaps in respective apertures 5 when shrinking.

Described outer bulge loop 6 becomes 0-20 degree angles by the side of telescopic pipe tail end one side with the telescopic pipe cross section.

Below the utility model is described in detail, the above only is the preferred embodiment of the utility model, when not limiting the utility model practical range, be allly to do impartial change and modify according to the application's scope, all should still belong in the utility model covering scope.

Claims

1. flexible rod linkage structure, comprise the telescopic pipe that at least two joints are pegged graft mutually, be provided with shell fragment in the gap between the adjacent expansion pipe, inboard telescopic pipe is provided with the aperture corresponding with shell fragment, the shell fragment inwardly protruding is stuck in the aperture, it is characterized in that: described telescopic pipe include at least one cylndrical surface and one and this cylndrical surface be in the locating face of different curve, the cylndrical surface of a rear telescopic pipe and locating face are complementary with cylndrical surface and the locating face of last telescopic pipe respectively; The front end of each telescopic pipe is provided with enlarging; Be provided with the deformable flexible circle in the gap between adjacent two telescopic pipes; The tail end of each telescopic pipe is equipped with screens section.

2. flexible rod linkage structure according to claim 1 is characterized in that: the second section telescopic pipe is equipped with outer bulge loop to the tube wall of minor details telescopic pipe, screens section is corresponding with outer bulge loop.

3. flexible rod linkage structure according to claim 1, it is characterized in that: described locating face is plane or arc surface.

4. flexible rod linkage structure according to claim 1 is characterized in that: described screens section is that closing in or the turnover of telescopic pipe tail end tube wall that the inside bending of the telescopic pipe tail end mouth of pipe forms forms the in-flanges of being close to the telescopic pipe inwall.

5. flexible rod linkage structure according to claim 1, it is characterized in that: the inwall of telescopic pipe is provided with internal projecting ring, and internal projecting ring is positioned at the shell fragment back.

6. flexible rod linkage structure according to claim 2 is characterized in that: described outer bulge loop becomes 0-20 to spend angles by the side of telescopic pipe tail end one side with the telescopic pipe cross section.