CN2566033Y

CN2566033Y - Connection structure for collapsible rod

Info

Publication number: CN2566033Y
Application number: CN 02264164
Authority: CN
Inventors: 郑明德
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-06
Filing date: 2002-09-06
Publication date: 2003-08-13
Anticipated expiration: 2012-09-06

Abstract

The utility model relates to a connection structure for a collapsible rod, which can be stretched and retracted after a plurality of tubes are mutually connected. The connection structure for a collapsible rod comprises more than two collapsible tubes which are in mutual inserting connection, an elastic sheet which is arranged between two contiguous collapsible tubes, wherein, protrusion in the elastic sheet is clamped in small holes of the collapsible tubes on the inner sides of the elastic sheet. The mouth part at the front part of each of the collapsible tubes is composed of a collapsible tube and inner flanged edge which is turned toward the inner side of the collapsible tube. Moreover, the inner flanged edge closely sticks to the inner wall of the collapsible tube. An inner opening of the inner flanged edge is clamped on an outward convex ring of one front collapsible tube. The mechanical strength at the point of the mouth part of each of the collapsible tubes is effectively increased through the improvement which is carried out to the mouth part of each of the collapsible tubes. In addition, the inner flanged edge which is limited by the tube wall of each of the collapsible tubes can not be deformed after the inner flanged edge is subjected to impact force. Therefore, a mouth of each of the collapsible tubes is firm. The utility model can bear comparatively big traction force. Each of the collapsible tubes can be connected reliably.

Description

The linkage structure of contraction pole

Technical field

The utility model relates to a kind of linkage structure of the contraction pole that can stretch or regain after being interconnected by the more piece pipe.

Background technique

The contraction pole that present employed more piece interconnects and can stretch and maybe can regain as antenna, religion bar etc., by clamping shell fragment on inner pipe, interconnects two adjacent joint collapsible tubes between its interconnective collapsible tube.Because the diameter of each its front and back of joint collapsible tube is identical, though match with the collapsible tube inner diameter that is connected, each saves collapsible tube and produce wearing and tearing after use, or exert oneself a little, because of each saves collapsible tube infinite place mechanism each other, so be easy to produce obscission, and it is unreliable to cause each collapsible tube to connect.To this patent ZL01263156.6, be by closing in clamping to collapsible tube evagination annulus and another collapsible tube front portion, solve the problem that each collapsible tube comes off effectively.But because the closing in of collapsible tube front portion is an extrusion moulding, the wall thickness of reducing is the thickness of collapsible tube, when therefore operating as the pulling force that overexerts when big, the dilatating and deformable that can cause collapsible tube to close up, and interconnective collapsible tube is come off.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of closing in of collapsible tube can not be out of shape, and each collapsible tube connects the linkage structure of reliable contraction pole.

Technical problem to be solved in the utility model is achieved through the following technical solutions: a kind of linkage structure of contraction pole, comprise above each collapsible tube of pegging graft mutually of two joints, be arranged on the shell fragment between the two adjacent collapsible tubes, the internal projection of shell fragment is connected in the aperture of its inboard collapsible tube, each collapsible tube is positioned on the tube wall of shell fragment one side and has the evagination annulus, it is characterized in that: the mouth of each collapsible tube front portion is made of the in-flanges of collapsible tube and turnover in pipe, and in-flanges is close on the inner tube wall, and the internal orifice of in-flanges is stuck on the last joint collapsible tube evagination annulus.

After the utility model adopts technique scheme, the mouth of each collapsible tube is made of the in-flanges of collapsible tube and turnover extruding in pipe, the thickness that makes collapsible tube closing in place is two times thickness of pipe wall, increased the mechanical strength of collapsible tube closing in place, in-flanges can be out of shape by placing restrictions on after being subjected to bigger impact force of collapsible tube tube wall in addition, therefore the closing in of collapsible tube is firm, when the limit mouth of the closing in in-flanges of collapsible tube withstands on the evagination annulus that connects another joint collapsible tube, can bear bigger pulling force, improper in wearing and tearing or manual operation that each collapsible tube generation is certain, what each collapsible tube all can not produce comes off, and connects very reliable.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is the structural representation of the utility model extended configuration.

Fig. 2 is the structural representation of the another kind of structure contraction state of the utility model.

Fig. 3 is the structural representation of the utility model shell fragment.

Fig. 4 is the sectional view of Fig. 3.

Embodiment

The linkage structure of the utility model contraction pole as shown in Figure 1, comprise the above collapsible tube I1 that pegs graft mutually of two joints, collapsible tube II3 and collapsible tube III4, collapsible tube I1, the caliber of collapsible tube II3 and collapsible tube III4 has nothing in common with each other and pegs graft mutually, two shell fragments 2 are separately positioned between collapsible tube I1 and the collapsible tube II3 and between collapsible tube II3 and the collapsible tube III4, as Fig. 3, shown in 4, shell fragment 2 is an arc-like sheet, can change according to the radius of curvature of collapsible tube, the protruding 2-1 of shell fragment 2 is connected to the aperture 3-2 of its inboard collapsible tube II3 and collapsible tube III4 respectively, in the 4-2, aperture 1-2 with shell fragment 2 clampings is also arranged on the collapsible tube I1, each collapsible tube is connected by shell fragment 2.As shown in Figure 1, collapsible tube I1, collapsible tube II3 and collapsible tube III4 are positioned on the tube wall of shell fragment 2 one sides and have evagination annulus 1-3,3-3,4-3, and the coupled back joint collapsible tube inner diameter of each collapsible tube evagination circle diameter is identical, evagination annulus 3-3, collapsible tube I1 that 4-3 is coupled and the mouth 1-4 of collapsible tube II3, the 3-4 clamping, see Fig. 1,2, mouth 1-4,3-4,4-4 is made of the in-flanges of collapsible tube and turnover extruding in pipe, this in-flanges is close on the inner tube wall, its in-flanges is circular, and the internal orifice of in-flanges is stuck in last joint collapsible tube evagination annulus 3-3, on the 4-3.For the internal orifice that makes the in-flanges on each collapsible tube can be connected on evagination annulus 1-3 on each collapsible tube, 3-3, the 4-3 reliably, as shown in Figure 2, evagination annulus 1-3, the 3-3 on each collapsible tube, the angle α of 4-3 clamping face are 0 °～20 °.The utility model is owing to improved the mechanical strength of each collapsible tube closing in place, and mouth can not be out of shape, and has therefore thoroughly solved the problem that each collapsible tube comes off.

As Fig. 1,2 is to guarantee that contraction pole connects the stability after stretching, at collapsible tube I1, collapsible tube II3 and collapsible tube III4 enlarging 1-1,3-1,4-1 are arranged all, the coupled back joint collapsible tube 1 of enlarging 3-1,4-1 is identical with collapsible tube II3 inner diameter as shown in Figure 1, and the inner diameter of the back joint collapsible tube that the enlarging 1-4 of same collapsible tube I1 is also coupled is identical.

When contraction pole of the present utility model stretches, collapsible tube I1, collapsible tube II3 and collapsible tube III4 extend as shown in Figure 1, the mouth 1-4 of collapsible tube, the internal orifice of 3-4 in-flanges withstand on evagination annulus 3-3, the last clamping of 4-3 that is connected, and enlarging 3-1, the 4-1 at the rear portion of each collapsible tube are supporting the inwall that respectively is connected; When regaining each collapsible tube, collapsible tube II3 and collapsible tube III4 all move back in collapsible tube I1 as shown in Figure 2.

Contraction pole of the present utility model not only is used for collapsible antenna, religion bar, also can be used for general contraction pole etc.

Claims

1, a kind of linkage structure of contraction pole, comprise above each collapsible tube of pegging graft mutually of two joints, be arranged on the shell fragment between the two adjacent collapsible tubes, the internal projection of shell fragment is connected in the aperture of its inboard collapsible tube, each collapsible tube is positioned on the tube wall of shell fragment one side and has the evagination annulus, it is characterized in that: the mouth of each collapsible tube front portion is made of collapsible tube and the in-flanges that turns down in pipe, and in-flanges is close on the inner tube wall, and the internal orifice of in-flanges is stuck on the last joint collapsible tube evagination annulus.

2, the linkage structure of contraction pole according to claim 1 is characterized in that: described in-flanges is circular.

3, the linkage structure of contraction pole according to claim 1 is characterized in that: the clamping face angle α of described each collapsible tube evagination annulus is 0 °～20 °.