JPH0494072A - Connector for printed substrate - Google Patents

Abstract

PURPOSE:To make a connector having a large number of contact points small and lower the force to insert and draw the connector by separating the materials and structures composed of contact points of a high resistance circuit and contact points of a low resistance circuit, respectively. CONSTITUTION:Contact terminals 15a, 15b, 16a, 16b of printed substrates 11, 12 are connected with a high resistance circuit and soldered terminal holes 13a, 13b, 14a, 14b are connected with a low resistance circuit. The connection with the high resistance circuit is carried out by connecting contactor terminals exposed in both end faces of a conductive rubber 31 with the contact terminals 15a, 15b, 16a, 16b. The connection with the low resistance circuit is carried out by using metal-made female contacts 23a, 23b and male contacts 24a, 24b. Since the metal contacts which need large force to be inserted and drawn out are limited to the use for connecting the contact parts of low resistance, the force to be inserted and drawn out of the whole connector becomes low.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a connector for connecting printed circuit boards in which a high resistance circuit and a low resistance circuit coexist in a small electronic device.

BACKGROUND OF THE INVENTION Conventionally, connections between printed circuit boards of this type have been constructed by connectors using the same metal contacts for both high resistance circuits and low resistance circuits.

FIG. 3 shows the structure of a conventional connector. In Fig. 3, 51 and 52 are printed circuit boards, and the connector 6
The metal female contact 63 is attached to the upper housing 61 of 0.
A metal male contact 64 is attached to the lower housing 62. Each end of the contacts 63 and 64 is attached to the printed circuit board 51.
．． 52 and connected to the circuit on the printed circuit board.

The circuits on the printed circuit boards 51 and 52 include high resistance circuits,
Since there are both low resistance circuits, some of the contacts 63 and 64 are connected to high resistance circuits and others are connected to low resistance circuits. However, in the conventional example, all of the contacts 63 and 64 are made of a low-resistance metal material.

Problems to be Solved by the Invention These metal contacts are inherently expensive as contact materials, and it is necessary to make one of them a super structure and the other a male structure for elastic contact. Therefore, the molding cost of the contacts is high (and the dimensions are large.Furthermore, since the female and male contacts engage with each other with a large contact force, the insertion/extraction force when connecting/disconnecting the connector is large). (There is also a drawback.

In order to connect low-resistance circuits, it is unavoidable to use metal contacts that are expensive, large in size, and have a large insertion/extraction force, but when connecting high-resistance circuits, it is necessary to use metal contacts with low resistance. There is no need to use metal contacts since they may be larger than in the case of resistive circuits.

However, in conventional connectors that connect both high-resistance circuits and low-resistance circuits, metal contacts are also used to connect high-resistance circuits. For this reason, the cost of the connector is high, the dimensions are large, and the insertion/extraction force is also large. The present invention aims to reduce the size and cost of the connector used in the present invention, and provides a connector with reduced insertion/extraction force A.

Means for Solving the Problems In order to achieve the above object, the present invention provides a printed circuit board having a contact terminal connected to a high resistance circuit and provided on a printed circuit board, and a contact terminal connected to a low resistance circuit and an opening. The contact unit includes a housing (attached to the housing) and a contact unit having contact and disconnection terminals that fit into the opening and come into contact with the contact terminals.

Function The present invention has the above-described configuration, in which the contact provided on one 71 housing and connected to the low resistance circuit is directly connected to the contact connected to the other low resistance circuit, and the contact terminals connected to the high resistance circuit are connected to each other. Since the connection is completed through the contact terminal on the contact unit, the constituent material and structure of the contact for low resistance can be made different from the constituent material and structure of the contact terminal for high resistance. The dimensions of the connector can be reduced, resulting in lower costs. In addition, the contact unit is guided through an opening provided in the housing, and when the low resistance contact is connected, the high resistance contact terminal and the contact terminal come into contact at the same time to complete the high resistance connection. , the force for inserting and removing the connector can also be reduced.

Embodiment FIGS. 1 and 2 show the structure of an embodiment of the present invention. In FIGS. 1 and 2, 11 is an upper printed circuit board, 12 is a lower printed circuit board, and solder terminal holes 13a, 13b, 14a are provided on each printed circuit board 11 and 12.
, 14b and contact terminals 15a, 15b, 16a, 16
b is provided. In addition, contact terminals 15a, 15b,
16a.

16b is connected to a high resistance circuit, and soldering is done through terminal hole 1.
3a, 13b, 14a, and 14b are connected to a low resistance circuit. On the other hand, the upper housing 21 and the lower housing 22 of the connector 20 each have a female contact 2 made of a metal material.
3a, 23b, male contact 24a.

24b, each soldered into a terminal hole 13a.

13b, 14a, and 14b are soldered.

A contact unit 30 is inserted into the opening 27 in the upper housing 21.
is inserted into the contact unit 30, and one or more conductive rubber contacts 31 are embedded and integrated into the contact unit 30. Both end surfaces of the conductive rubber 31 are exposed from the contact unit and constitute contact terminals, and are arranged at positions where they can come into contact with the contact terminals 15a, 15b, 16a, and 16b, respectively. The lower housing 2 is attached to the upper housing 21.
A flexible pawl 25 for connecting to the lower housing 22 is integrally molded, and a fixed pawl 26 is also provided facing the lower housing 22.

With the contact unit 30 inserted into the opening 27 of the upper housing 21, the upper housing 21 and the lower housing 22 are aligned, and the upper housing 21 and the lower housing 22 are aligned.
The flexible claws 25 and fixed claws 26 attached to both sides are locked, and the upper printed circuit board 11 and the lower printed circuit board 12 are combined.

Generally, conductive rubber has higher electrical resistance than metal contact materials, but the conductive rubber contact terminals connect to the contact terminals 15a, 15b, 16a connected to the high resistance circuit.
Since it is 16b, there will be no electrical problem. On the other hand, the low resistance circuit is connected by the engagement of the low resistance metal female contacts 23a, 23b and the male contacts 24a, 24b connected to the low resistance circuit, so this also does not cause any electrical problems.

Further, since the high resistance circuit is connected by simply bringing the contact terminals into contact with each other, the insertion/extraction force can be reduced compared to the case where the female contacts and the male contacts are engaged.

In this way, according to the connector of the embodiment of the present invention, conductive rubber is used for the connection part that does not require low resistance, which is cheaper (and smaller in size) than metal contacts, so the overall size of the connector is also small. In addition, since metal contacts that require a large insertion/extraction force are used only in low-resistance connections, the insertion/extraction force of the entire connector can be reduced.

Further, the contact terminal 31 made of conductive rubber is the contact terminal 15.
．． Make it slightly larger than the interval dimension of 16 (X in Figure 2). By doing so, when the housings are joined together, the rubber contracts due to its own elasticity, and the pressing force generated by the elastic force allows the rubber to reliably contact the contact terminals. This pressing force acts in a direction that tends to separate the metal contacts 23 and 24, but in the present invention, the engagement between the flexible claw and the fixed claw prevents poor contact between the contacts due to the pressing force. There is.

In this example, a case was explained in which high-resistance conductive rubber was used as the contact material of a high-resistance circuit, but the contact material does not necessarily have to have high resistance, and any material with low resistance but excellent moldability may be used. Bye. Further, the high resistance material does not need to be limited to rubber materials, and any material that is conductive and elastic, such as conductive plastic, may be used.

Effects of the Invention As is clear from the above embodiments, the present invention uses different materials and structures for the contacts of the high-resistance circuit and the contacts of the low-resistance circuit. It has the advantage of being smaller, reducing costs, and reducing insertion/extraction force.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a printed circuit board connector according to an embodiment of the present invention, FIG. 2 is a side view including a partially sectional view, and FIG. 3 is a side view of a conventional connector. 11.12...Printed circuit board, 15a, 15b
, 16a, 16b --- contact terminal, 21, 22 ---
...Housing, 23a, 23b, old...Female contact, 2
4a, 24b... Male contact, 25... Flexible claw, 26... Fixed claw, 27.28...
...Opening, 3o...Contact unit, 31.
...Contact terminal. Name of agent: Patent attorney Shigetaka Awano (1 person) Figure 2z Figure 3

Claims (4)

[Claims] (1) A housing having a contact terminal provided on a printed circuit board and connected to a high resistance circuit, and a contact and an opening mounted on the printed circuit board and connected to a low resistance circuit;
A printed circuit board connector comprising a contact unit having a contact terminal that contacts the contact terminal and fitting into the opening. (2) The printed circuit board connector according to claim (1), wherein the contact terminals are made of conductive rubber. (3) The printed circuit board connector according to claim 1, further comprising a contact terminal embedded in the contact unit and having a surface exposed from the contact unit in contact with the contact terminal. (4) The printed circuit board connector according to claim 1, wherein one housing is provided with a protruding pawl, and the other housing has a flexible pawl that engages with the protrusion.