CN201112736Y

CN201112736Y - Contact pin used for electric connection

Info

Publication number: CN201112736Y
Application number: CNU200720114681XU
Authority: CN
Inventors: 虞寅达
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-11
Filing date: 2007-09-11
Publication date: 2008-09-10
Anticipated expiration: 2017-09-11

Abstract

The utility model relates to a round pin used for European-style plugs. The round pin is different in structure from the prior solid copper bar pin, and has a hollow integral structure fabricated by continuous drawing with progressive die and extrusion molding by a lathe. The round pin has the advantages of reduced material consumption, low production cost and high mechanical strength. Tests prove that the performance parameters of the round pin, such as mechanical strength and current capacity, are equal to or exceed that of the copper bar pin.

Description

The contact pin that is used to be electrically connected

Technical field

The utility model relates to a kind of contact pin that is used for being electrically connected on the plug, especially a kind of circular contact pin structure that is applicable to European plugs.

Background technology

The circular contact pin of existing European plugs normally adopts solid copper bar to be formed by automatic lathe car system, and the shortcoming of this production technology is that the consumption copper material is many, the production cost height, and also the daily output is low; So to present resource scarcity, advocate under the energy-conservation situation of falling material energetically, propose a kind ofly can economize material and reduce cost, can keep the contact pin of the electrical connection of original electric conductivity of contact pin and mechanical strength again, become a kind of extremely urgent work.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of production cost low and have a contact pin that is used to be electrically connected of excellent mechanical intensity and electric conductivity at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: the contact pin that this is used to be electrically connected is a cylindrical shaft-like body, it is characterized in that the integrative-structure that described cylindrical shaft-like body is an inner hollow.

Compared with prior art, the utility model adopts integrally formed hollow overall structure with the circular contact pin of European plugs, the i.e. overall structure that forms by the whole punching press pull and stretch of copper strips, and need not be shaped with welding or alternate manner, thereby strengthened the electric conductivity of contact pin, and because contact pin is hollow structure, economical with materials effectively, reduce production costs, and can guarantee mechanical strength; After tested, parameters such as its mechanical strength, ampacity meet and exceed the performance of copper rod car product.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is along the cutaway view of A-A line among Fig. 1.

Fig. 3 is a deep-drawing technique schematic diagram of making the utility model embodiment.

Fig. 4 is a machined into schematic diagram of making the utility model embodiment.

Fig. 5 is the structural representation of another kind of embodiment of the present utility model.

Fig. 6 is the cutaway view of Fig. 5 along the B-B line.

Embodiment

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

Embodiment one: as depicted in figs. 1 and 2, the contact pin 1 of present embodiment is for being used for the circular contact pin of European plugs, this contact pin 1 is made of copper, cylindrical rhabodoid, and this cylindrical shaft-like body is different with the solid copper bar contact pin structure of prior art, for adopting the integrative-structure of the inner hollow that progressive die continuous drawing and lathe extrusion process be shaped.

Be below the manufacture craft of contact pin of the present utility model (be diameter 4.8mm, highly be that the circular contact pin of 31.5mm is an example) that it mainly comprises the steps: with the specification

One, the progressive die continuous drawing draws copper pipe

With reference to shown in Figure 3, this contact pin 1 is cut flat forming through continuous six road pull and stretch and the 7th road afterbody.By auto-feeder 5 with wide 24.5mm, the copper strips 6 of thick 0.5mm step pitch is in accordance with regulations sent constantly into mould 3, first road is a 21.5mm cylindrical shape blank at the next diameter of strip upper punch, and pull and stretch becomes diameter to be 14.5mm, highly to be to be shaped the cylindrical work pieces of 7.4mm and then by manipulator 4 workpiece to be sent into next station; The second road pull and stretch becomes diameter to be 11.6mm, highly to be the cylindrical workpiece of 11.4mm; The 3rd road pull and stretch becomes diameter 9.2mm, highly is the cylindrical workpiece of 15.5mm; The 4th road pull and stretch becomes diameter 7.3mm, highly is the cylindrical workpiece of 21.5mm; The 5th road pull and stretch becomes diameter 5.8mm, highly is the cylindrical workpiece of 28mm; The 6th road pull and stretch becomes diameter 4.8mm, highly is the cylindrical workpiece of 35mm; The 7th road workpiece afterbody is cut flat, is about to the workpiece afterbody excision that the 6th road is shaped, and finally makes a diameter 4.8mm, highly is the cylindrical shape copper pipe of 31.5mm.

Two, automatic lathe 7 extrusion processes

Contact pin 1 is typically provided with the annular groove of undergauge thereon owing to the needs that the basic shell that insulate with socket connects, and the contact pin 1 of different size, and its groove position is all different.This operation be exactly for Manufactured diameter 4.8mm, height for the cylindrical shape copper pipe of 31.5mm in the middle part 11 and rear portion 12 shape of contracting make the product that profile reaches dimensional requirement.

With reference to shown in Figure 4, it is on 5000 rev/mins the chuck of automatic lathe 7 that copper pipe laterally is folded in rotating speed, extruding cutter head 82 is fixed on the knife rest 8 that can vertically move forward and backward, knife rest 8 is installed on the planker of horizontal move left and right, and this extruding cutter head 82 is the alloy steel ball 81 that a diameter is 4.0mm.During work, when planker moves to the workpiece 1 ' shaped position that contracts, knife rest 8 feed forward, make cutter head 82 vertically extruding workpiece 1 ', cutter head 82 contact generation high temperature with the copper pipe of high speed rotating, make the bobbin deliquescing of annealing be squeezed and contract shape and meet the requirements of size.Equally, with another be fixed on the frame cutter head 71 vertically extruding workpiece 1 ' middle part 11 produce the shape of contracting together.

Embodiment two: shown in Fig. 5 and Fig. 6 is contact pin 1 structure of another specification of the present utility model, and it also is to adopt progressive die continuous drawing and lathe extrusion process to be shaped.But itself and embodiment one different is overall dimension and the outside shaped position different (specification is diameter 4.0mm, highly is 28.5mm) that contracts, and manufacture craft substantially roughly the same, also comprise mainly that the progressive die continuous drawing draws copper pipe and two steps of automatic lathe 7 extrusion processes, specific as follows:

One, the progressive die continuous drawing draws copper pipe

Can be with reference to shown in Figure 3, the present embodiment contact pin also is to cut flat forming through continuous six road pull and stretch and the 7th road afterbody.At first by auto-feeder 5 with wide 22mm, the copper strips 6 of thick 0.5mm step pitch is in accordance with regulations sent constantly into mould 3, first road is a 20.0mm cylindrical shape blank at the next diameter of strip upper punch, and pull and stretch becomes diameter to be 12.5mm, highly to be to be shaped the cylindrical work pieces of 7.5mm and then by manipulator 4 workpiece to be sent into next station; The second road pull and stretch becomes diameter to be 10.0mm, highly to be the cylindrical workpiece of 11.5mm; The 3rd road pull and stretch becomes diameter 8.0mm, highly is the cylindrical workpiece of 16.5mm; The 4th road pull and stretch becomes diameter 6.5mm, highly is the cylindrical workpiece of 21.5mm; The 5th road pull and stretch becomes diameter 5.2mm, highly is the cylindrical workpiece of 27.5mm; The 6th road pull and stretch becomes diameter 4.0mm, highly is the cylindrical workpiece of 31.5mm; The 7th road workpiece afterbody is cut flat, is about to the workpiece afterbody excision that the 6th road is shaped, and finally makes a diameter 4.0mm, highly is the cylindrical shape copper pipe of 28.5mm.

Two, automatic lathe 7 extrusion processes

Can be with reference to shown in Figure 4, this operation is for 13 shapes of contracting are made the product that profile reaches dimensional requirement in the middle part for the cylindrical shape copper pipe of 28.5mm with Manufactured diameter 4.0mm, height.

By promptly obtaining the contact pin 1 of different size after above-mentioned pull and stretch and the extrusion process, contact pin 1 is owing to directly make with copper strips 6, thereby not only economize material but also can guarantee contact pin 1 original electric conductivity and mechanical strength, and after tested, its mechanical strength, ampacity and other parameter all meet and exceed the contact pin performance that real core copper rod forms through automatic lathe 7 car systems.

Claims

1, a kind of contact pin that is used to be electrically connected includes cylindrical shaft-like body, it is characterized in that the integrative-structure that described cylindrical shaft-like body is an inner hollow.