CN1007106B - Method of mfg. contact spring sockets - Google Patents

Abstract

The present invention relates to method for manufacturing a socket which is provided with a plurality of contact springs (6) radially inwards bent. One end of each spring is fixed in a barrel-shaped thin wall socket body (1). Straight springs are inserted into an annular space between a circular bar and the socket wall to be ranged. An annular head (7) partially extending into a binding post (2) of the socket body is attached to the springs so that one end of each spring is positioned. A bush (10) of which the inner diameter is smaller than the external diameter of an annular barrel (5) plus double spring diameter is inserted into the socket body by attaching to the inner wall of the socket body so that the inner end edges (11, 12) radial inwards press the springs; subsequently, the bush is inserted into the conical front end (8) of the binding post (2) which is inserted into a socket to radially outwards presse one end of each spring which is far away from a jack before the springs and the edge of the socket pushing the binding post (2) are clamped, flanged and fixed.

Description

Method of mfg. contact spring sockets

The present invention relates to a kind of method of making the contact spring socket, this socket has many radially aduncate contact springs, and an end of contact spring is fixed on one and roughly becomes in the columnar socket, and this socket is made of deformable thin walled cylinder body.The step of this method is as follows: at first with one heart insert socket in from jack a pole, pole and socket form an annular space together, and center for a ring tube that inserts in the socket, then, from a straight contact spring being inserted the annular space in the socket away from the other end of jack, in the narrow annular channel of its front end between ring tube and socket, contact spring is made of a section spring wire; When contact spring has been arranged mutually, part puts in the circular head of the binding post front end of socket and is close to contact spring, and the one end is fixed on this position, thereby when spring in when, radially strain taking place, it puts near the free end in the narrow annular channel of jack and can move freely therein.

In West Germany issued for approval patent application P3342742.9-34, a kind of method that belongs to this technical field has been described, can the especially little contact spring socket of manufacturing structure according to this method.The sleeve wall thickness that this method is used is 0.1mm, can be prefabricated economically by drawing process, and can be easily from the outside with this sleeve distortion.After contact spring inserts, make on the socket two to correspond respectively to the ring tube and circular head all forms an annular groove that radially inwardly stretches out in the place that certain intervals is axially arranged.These annular radial grooves are pushed down contact spring, and make its footpath inwardly crooked.

In this way, diameter has only the contact plug of 0.6mm only need provide an external diameter to have only the socket of 1.5mm.Like this can the very a large amount of contact spring socket of arranged in very little space, thus the electric wire connecting junction of high-quality many contact points produced at low cost.

In this manufacture method, the degree of deformation of socket has determined the size of annular groove, thereby has determined the degree of crook of contact spring, and the degree of crook of contact spring has determined the size of contact force.

Also have a kind of production method (GB-1136,589 and U.S. patent documents 3,023,789), contact spring comes on the generation line of hyperboloid revolving body of rigidity socket, with they two round elbows tightly roof pressure on the socket end face.Even now is produced, and to touch the spring jack sizes fine, can realize miniaturization Design, but its shortcoming is: spring end can not be electroplated, can only keep very narrow franchise between latch and the socket, when the spring performance is bad, be so particularly, and can only adorn minority and touch spring, thereby limit the conduction of electric current.

According to the present invention, can form annular groove with the distortion of socket, only need a kind of method of making the contact spring socket, comprise the following steps: to prepare many straight contact springs; Prepare a socket, it has is columnar thin-walled haply, and one open-ended, and another end is the flanging with central jack; Prepare a pole and can pass the ring tube of this pole; Insert pole from jack, this rod is put the ring tube to the flanging that leans at socket, formation one narrow annular channel between socket inwall and ring tube through the openend of socket; The said many straight contact springs insertion sockets and the annular space between pole, its front end is placed in this narrow annular channel from this openend; Again a lining is inserted socket and make its inwall of being close to socket, the internal diameter of this lining adds the diameter of the contact spring of twice less than the external diameter of ring tube, and the interior ora terminalis of lining is radially inwardly pushed down contact spring like this; Prepare a binding post, it has a front end is the frustum of a cone; Insert binding post through openend, this frustum of a cone is leaning an end of this contact spring the inner surface of this socket, make this socket produce distortion and form a convex shoulder, be used for this frustum of a cone of this binding post is remained in this socket near the zone of this open end.

If after contact spring inserts annular space, earlier pole is partly extracted out, after lining inserts, be inserted into again, and after contact spring is fixing, it is all extracted out from socket, verified so this method is specially adapted to very rapidly make very little contact spring socket.

When making the miniaturized contact spring socket, preferably radially inwardly be pressed in the distance between the lining contact point on the contact spring, be scheduled in the chamfering of putting on the ora terminalis of being done before the socket by lining.

Following description and accompanying drawing will further disclose details of the present invention, advantage and feature, and accompanying drawing has also shown all details of not describing in the literary composition.The contents are as follows shown in the accompanying drawing:

Fig. 1-4 is the step of the said method according to the present invention;

Fig. 5 is the contact spring socket that said method is made according to the present invention.

Referring to accompanying drawing, contact spring socket as shown in Figure 5 has one and roughly becomes columnar socket 1, and this socket 1 is made of deformable thin walled cylinder body and the binding post 2 of ining succession.The other end of socket 1 has a flanging 3 with central jack 4.Ring tube 5 at the jack position nestles up flanging 3, and the internal diameter of ring tube 5 is more a little bit smaller than the diameter of the jack on the socket 14.In socket around having arranged many contact springs 6.One end of contact spring 6 is fixed on the circular head 7 of the binding post 2 that puts in socket 1 and lives facing to wiring between the end of 2 socket 1, the front end of circular head 7 protrudes into the frustum of a cone 8, the other end of contact spring 6 points to the jack of socket 1, can move freely in the narrow annular channel between socket and the ring tube 5.With making its inwall of being close to socket in the lining 10 insertion sockets 1, contact spring 6 is curved inwardly as shown in Figure 5, the internal diameter of this lining 10 adds the diameter of contact spring 6 twices less than the external diameter of ring tube 5.Two interior ora terminalis 11 of this lining 10 and 12 are radially inwardly pushed down contact spring 6.The ora terminalis 11 and 12 of pushing down contact spring 6 keeps at a certain distance away in the axial direction, corresponds respectively to ring tube 5 and circular head 7.Ora terminalis makes radially inside strain of contact spring.

The normal form of the tube of ring shown in the figure 5 can change to some extent, can make a flanging that diameter is bigger at its that end facing to jack, be used to increase the contact-making surface area, but its external diameter should select forr a short time than the internal diameter of contact spring socket 1.

Respectively from Fig. 4 or Fig. 5 as can be seen, the internal diameter of ring tube 5 greater than between the contact spring of the bending in the plane that is parallel to socket axis at any one in the distance at socket middle part.Very loose ground inserts ring tube 5 in the socket 1 before inserting contact spring 6, is then headed on by the end of the contact spring that nestles up it assemble.According to described size relationship,, also can guarantee good being in contact with one another even depart from its axis a little during plug insertion socket.Because in this case, ring tube 5 can side direction be given way together with the contact spring that nestles up it.

Fig. 1 to 4 is depicted as the said step of manufacturing according to the present invention.At first socket 1 is located by the pole 13 that passes jack 4.Then, as shown in Figure 1, will encircle tube 5 and insert in the sockets 1 and make it around pole 13.Ring tube 5 shown in Fig. 1 to 5 all is this form.Opposite with above-mentioned form, also can use the ring tube that has improved, it has a flanging at it on that end of jack 4, more large contact surface is long-pending so that provide.

In next step, by the conveying device (not shown), in the annular space between contact spring 6 insertion poles 13 and the socket 1.In step shown in Figure 2, pole 13 part from socket 1 is extracted out, and contact spring 6 moves to lining 10 to the center and gives way, thereby the inwall that makes lining 10 can be close to socket inserts.Then again pole 13 is inserted (shown in Figure 3), contact spring 6 is roughly being arranged in parallel to each other by strain and along the outer surface of pole.The end of contact spring roughly forms an annulus, and its diameter is big must to be enough to allow the circular cone front end 8 of binding post to insert.Owing to have the frustum of a cone 8 on the circular head 7, make circular head 7 be easy to insert in the space by the upper limit of contact spring 6, as shown in Figure 4, after extracting pole 13 out, make binding post 2 fixing socket edge flanging with socket 1, binding post 2 acts on pressure on the socket with supports outer, and contact spring 6 just is fixed on its position that is inserted into distortion like this.As Fig. 4 further shown in like that, a cannelure 14 is arranged below the circular head 7, the flanging of socket 1 upper end puts in this groove.

Under completion status shown in Figure 5, the contact spring socket can be finished the function test of regulation.

Claims (3)

1, a kind of method of making the contact spring socket, comprise the following steps: to prepare many straight contact springs (6), prepare a socket (1), it has is columnar thin-walled haply, one open-ended, and another end is the flanging (3) with central jack (4); Prepare a pole (13) and can pass the ring tube (5) of this pole (13); Insert pole (13) from jack (4), this rod (13) is put ring tube (5) to the flanging (3) that leans in socket (1), formation one narrow annular channel between socket (1) inwall and ring tube (5) through the openend of socket (1); The annular space between said many straight contact springs (6) insertion socket (1) and pole (13), its front end is placed in this narrow annular channel from this openend; Again a lining (10) being inserted socket (1) makes it be close to the inwall of socket (1), the internal diameter of this lining adds the diameter of the contact spring (6) of twice less than the external diameter of ring tube (5), the interior ora terminalis (11,12) of lining (10) is radially inwardly pushed down contact spring (6) like this; Prepare a binding post (2), it has a front end is the frustum of a cone (8); Insert binding post (2) through openend, this frustum of a cone (8) is leaning an end of this contact spring (6) inner surface of this socket (1), make this socket (1) produce distortion and form a convex shoulder, be used for this frustum of a cone (8) of this binding post (2) is remained in this socket (1) near the zone of this open end.

2, according to the method for claim 1, it is characterized in that: after contact spring (6) inserts annular space, earlier pole (13) is partly extracted out, after lining (10) inserts, be inserted into again, and after contact spring (6) is fixing, it all extracted out from socket.

3, according to the method for claim 1 or 2, it is characterized in that: insert socket (1) before at lining (10), by ora terminalis in it (11,12) chamfering being predetermined the distance between the strong point of radially inwardly pushing down contact spring on the lining (10).