JPS6131490Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a connector equipped with a tuning fork-like female contact into which a printed circuit board, a plate-like contact, etc. can be inserted and removed.

An example of this type of connector is a metal coupling connector consisting of a male connector M and a female connector F, as shown in FIG. The male connector M is
A male contact MC with a blade-shaped tip is attached to the contact insertion hole BH of the base plate BP via an insulator MI. This male contact MC is attached to a printed circuit board PC. The female connector F has a box-shaped base B and a tuning fork-shaped female contact that is fixed through the bottom of the box-shaped base B.
It consists of an FC and an insulator FI that insulates between the female contacts FC. This female contact FC is attached to a BD such as a motherboard.

The metal coupling connector configured in this way is
Blade-shaped male contact with good dimensional accuracy without directly using printed circuit board edges with poor dimensional accuracy
MC is a female tuning fork contact.
Since it has a structure that can be inserted into and removed from the FC, the stability of contact pressure is improved compared to card edge type connectors, so it is widely used in aircraft, computer main equipment and peripheral equipment, communications equipment, system equipment, etc. .

However, the male contact MC and female contact FC of the conventionally used metal coupling connectors
Since it is only configured as shown in FIG. 1, it is disadvantageous in the following points. That is, at the end of the male contact MC, an inclined surface IN was formed symmetrically with respect to the center line so that the plate surface that comes into contact with the female contact FC when inserted is tapered. Further, the female contact FC was formed symmetrically with arm portions A facing each other and a protruding portion S having a substantially semicircular cross section projecting inward from the tip thereof.

Therefore, when inserting the male contact MC into the female contact FC, when the top TP of the male contact MC, that is, the plane P parallel to the inclined surface IN, and the joint part pass through the protrusion S of the female contact FC. ,
A very large insertion force is required.

For this reason, a metal coupling connector constructed as shown in FIG. 2 has been considered as a metal coupling connector that can reduce the insertion force without reducing the contact pressure. In other words, both arms A1 and A2 of female contact FC
The position of a protrusion S having a semicircular cross section protruding inward at the free end of the contact member MC is different in the insertion direction of the male contact MC.

With such a configuration, the maximum insertion force can be reduced by l compared to the conventional example when the positions of the protrusions S shown by broken lines are equal in the insertion direction, as shown by the solid line in Fig. 3. Recognize. In Fig. 3, a indicates when the top of the male contact MC in Fig. 2 (junction between the inclined surface of the tip and the parallel plane) TP reaches point a of the female contact FC; b, c, and d indicate when points b, c, and d are reached. Furthermore, the one-dot chain line and the two-dot chain line indicate the insertion force on one side of the male contact MC and female contact FC.

However, in the configuration shown in Figure 2, the length of the left and right arms A1 and A2 of the female contact FC (specifically, the length that acts as the contact spring pressure between the free end and the fixed end FX) is Due to different male contacts
When the MC is completely inserted into the female contact FC, the contact pressure acting on both sides of the male contact MC is different. Therefore, there is a problem in terms of reliability with respect to contact.

This invention was devised in view of the above circumstances, and provides a connector in which the contact pressure acting on both sides of a tuning fork-shaped female contact, a printed circuit board inserted into the female contact, a blade-shaped contact, etc. is equal. The purpose is to

This invention will be explained below with reference to the drawings. Here, the description will be given using a metal coupling connector as an example, but it goes without saying that the present invention is not limited to this and can also be applied to a card edge connector. FIG. 4 is a plan view showing only the contacts, which are the essential part of this invention. As is clear from the figure, the left and right arms A1 and A2 of the tuning fork female contact FC
The structure is as follows, in which the position of the protruding part S, which protrudes inward from the free end part and has a substantially semicircular cross section, is different by a dimension x. That is, the fixed end FX of the arm A2 on the side with the shorter protrusion length, that is, the left and right arms A1, A2
A groove G having a depth x is formed in the axial direction in the connecting portion where the two are connected. The blade-shaped male contact MC has the same configuration as the conventional one.

This structure not only reduces the insertion force when inserting the male contact MC into the female contact FC, but also reduces the insertion force when inserting the male contact MC into the female contact FC.
When the insertion of the MC is completed, the contact pressure generated between both surfaces and the protruding portions S of both arms A1 and A2 of the female contact FC becomes equal. This is because the groove G is formed in the fixed end FX on the A2 side of the female contact FC, which has a short protruding length, so that the arm lengths on which the contact pressure of both arms A1 and A2 are applied are equal. . Furthermore, since a groove of a predetermined depth is simply formed at the fixed end of the female contact FC, it can be easily processed by punching.

Figure 5 shows a contact configured as shown in Figure 4.
It is a diagram when MC and FC are arranged in two rows in insulators IS1 and IS2, respectively. By doing so, more stable contact pressure can be obtained than with a single row connector. This is because twisting is less likely to occur.

When using contacts MC and FC to create a single-row connector as shown in Figure 4, the female contacts FC attached to the insulator are alternately oriented (specifically, the grooves G are alternated). ) can prevent possible twisting of the male contact MC.

Note that this invention is not limited to the above-mentioned embodiments,
For example, the shape of the female contact FC fixed end FX, the groove G
Any configuration may be used as long as the length of the arm acting on the contact pressure can be made substantially equal even if the shape of the contact pressure is changed. It goes without saying that the connector can also have a configuration of three or more rows.

According to the invention described above, it is possible to provide a connector in which the contact pressure acting on both sides of the female contact in the form of a tuning fork, the printed circuit board inserted therein, the blade-like contact, etc. is equal.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the schematic structure of a metal coupling connector, Fig. 2 is a front view showing an example of conventionally considered male and female contacts, and Fig. 3
The figure is a characteristic diagram comparing the insertion force of a connector with the contacts shown in Figure 2 and a conventional connector. Figure 4 is a front view showing an example of the contact of the connector according to this invention. Figure 5 is a connector according to this invention. FIG. 1 is a schematic configuration diagram of an embodiment of the present invention. MC...blade-shaped male contact, IN...slanted surface, P...plane, TP...top, FC...tuning fork-shaped female contact, IN1, IN2
...Insulator, S...Protrusion, A1, A2
...Arm, G...Groove, FX...Fixed end.

Claims (1)

[Scope of utility model registration request] In a connector equipped with a tuning fork-like female contact into which a printed circuit board, a plate-like contact, etc. can be inserted and removed, the apex positions of the protrusions that protrude inside the free end side ends of both arms of the female contact are different. and the lengths of both arms acting as contact pressure between the apex positions and the fixed ends of both arms are made equal.