JPS62283575A - Connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a connector.

"Prior Art" By attaching a first and second base to each other, a male contact provided on the first base and a female contact provided on the second base are brought into contact and an electrical connection is established. connector is used.

In this type of connector, a bottle contact is generally used as the male contact, and the bottle contact is inserted and fitted into the female contact by attaching the first and second base bodies.

The main parts of this type of conventional connector are constructed as shown in FIG.
is placed prominently. The second base body 13 attached to the first base body 11 is provided with a storage chamber 15.
A female contact 14 is housed within 5.

The male contact 12 is shaped like a bottle, and the female contact 1
4 is configured such that the contact pieces 14 are arranged opposite to each other,
The ends of the contact pieces 14 facing the opening of the storage chamber 15 are bent in a direction close to each other, and an elastic clamping part 16 is attached to the bent part.
is formed. The pin diameter of the male contact 12 is set to be slightly larger than the clamping interval of the elastic clamping part 16.

When the first and second base bodies 11.13 are attached, the male contacts 12 are inserted and fitted between the contact pieces 14 by expanding the gap between the elastic clamping parts 16.

When the male contact 12 and the female contact 14 are in a completely fitted state, the outer circumferential surface of the male contact 12 is brought into contact with the elastic clamping portion 16 at two points at opposing positions.

Generally, as shown in Figure 9, the contact force is P, the wedge angle is θ,
The friction angle is θ1, the friction force is PM, the spring constant of the contact is k, -
When the displacement per contact is 6 and the insertion force is F, the following equation holds true.

F=2Pjan(θ+θF > ...(11P=k
・δ...(2) When the relationship between the insertion force F and the fitting depth D is actually measured in the conventional connector having the configuration shown in FIG. 7, a relationship curve as shown in FIG. 8 is obtained, In this conventional connector, a maximum insertion force indicated by F wax occurs upon insertion of the male contact 12 into the female contact 12.The spring constant set in the final contact state is constant and the insertion process proceeds. The displacement δ increases accordingly. Therefore, according to equation (2), as the insertion process progresses, the displacement δ increases and the contact force P increases. Normally, the wedge angle θ is small in the vicinity where the contact force P is at its maximum value, and the insertion force F becomes almost only the frictional force PM.

In the process of inserting the male contact 12 into the female contact 14, the contact force P increases before the wedge angle θ becomes sufficiently small.
becomes a large value, and the maximum insertion force Fmax is obtained near this value.

"Problems to be Solved by the Invention" In recent years, this type of connector has been significantly downsized as a whole, and the number of signal wires to be connected per base is also increasing. For example, some have been proposed in which the number of signal lines to be connected reaches several hundred.

This kind of connector for this! is the insertion force per core F
It is necessary to make the connector as small as possible so that the connector can be attached easily and smoothly even if the number of signal wires to be connected is large. However, in conventional connectors of this type, the maximum insertion force per core is relatively large, and multi-core connectors require a large force to attach.

In addition, from the viewpoint of miniaturization of connectors, the male contact in conventional connectors of this type is pin-shaped, and when miniaturizing, the pin diameter cannot be reduced beyond a certain degree from the viewpoint of strength. There is.

This invention was made in view of the current state of conventional connectors of this type, and its objectives are: - to reduce the insertion force per core, and to allow even multi-core structures to be installed lightly and smoothly;
In addition, the male contact is formed in a thin plate shape and has a structure that makes it possible to reduce the overall thickness. A female contact is attached to the base body, and by mounting the first and second base bodies, the male contact is inserted into the female contact and electrical connection is established.

In this invention, the male contact is composed of first and second elastic contact pieces that closely face each other, and the width of the first and second elastic contact pieces is narrowed at the tip side, and the width of the first and second elastic contact pieces is narrowed at the tip side.
narrow strips are formed and these narrow strips are arranged to lie on the same plane.

On the other hand, the female contact consists of first and second elastic holding pieces disposed opposite to each other, and the first and second elastic holding pieces are arranged on the distal end side of the female contact.
An elastic clamping portion is formed in which the distance between opposing surfaces is narrower than the outer width of the elastic contact piece.

"Function" In this invention, in the process of inserting the male contact into the female contact, the male contact side also undergoes elastic deformation. It is possible to significantly reduce the contact force between the two. Therefore, even a multi-core connector can be smoothly attached with a light insertion force. Further, since the male contact has a thin plate-like structure, the overall structure can be made thinner, and the entire connector can be made smaller.

"Embodiments of the Invention" Hereinafter, the present invention will be described in detail based on embodiments thereof using the drawings.

FIG. 1 is a plan view showing the configuration of the main parts of an embodiment of the connector of the present invention. It has a configuration in which a female contact 24 is housed.

The male contact 22 has first and second contacts as shown in FIG.
The elastic contact pieces 26 and 27 are configured to closely face each other. The width of the plate surface of the first and second elastic contact pieces 26, 27 is narrowed on the distal end side to form first and second narrow piece portions 28, 29, respectively. These first and second
The narrow strips 28 and 29 are arranged so that their tips lie on the same plane. For this purpose, the first and second elastic contact pieces 26, 27 are provided with bent portions 30-1 and 30-2 that are bent toward each other at an intermediate position.

As shown in FIG. 5, the female contact 24 has a structure in which first and second elastic holding pieces 32 and 33 made of an elastic conductive material are arranged facing each other.

The tips of the first and second elastic holding pieces 32, 33 are bent in a direction close to each other, and an elastic clamping portion 35 is formed at this bent portion. The first and second
The spacing between the plate surfaces of the elastic holding pieces 32 and 33 is the same as that of the male contact 2.
The outer width of the first and second elastic contact pieces 26 and 27 is narrower than the outer width of the first and second elastic contact pieces 26 and 27.

The female contacts 24 are each housed in a housing chamber 40 formed in the second base body 23 . An opening 41 is formed on the surface side of the second base body 33 of the storage chamber 40, and a taper 41T is formed at the end of the opening 41.

The contact 22 is fixed and protrudes from the first base 21, and a movable guide plate 37 is movable relative to the first base 21 so as to cover the protruding end of the male contact 22. It is attached.

The movable guide plate 37 is provided with openings 38 corresponding to the protruding positions of the respective male contacts 22.
A taper 38T is formed on the base body 21 side. The movable guide plate 37 protects the male contacts 22 protruding from the first base 21 and guides the insertion of the male contacts 22 into the female contacts 23.

FIGS. 2(A), (B), and (C) show the first base body 21 and the second base body 21.
The respective mounting processes during mutual mounting with the base body 23 are shown. FIG. 2(A) shows a state before mounting, with the protruding end portion of the male contact 22 being covered and held by the movable guide plate 37.

When the attachment of the first and second base bodies 21.23 is started, (
From state A) to state (B)? ) state, and passes without any resistance between the thin plate-shaped first and second holding parts 35 arranged in parallel on the same plane. In the process of fitting the male contact 22 and the female contact 24, the tapers 38T and 41
The presence of the T allows the male contact 22 to be smoothly inserted into the female contact 24. As the male contact 22 is further inserted, the elastic clamping portions 35, which have a narrower interval than the outer width of the first and second elastic contact pieces 26.27, are pushed and expanded by the first and second elastic contact pieces 26.27. It will be done. The male contact 2 is inserted into the female contact 24 while being elastically held between the first and second elastic holding pieces 32 and 33 of the female contact 24.
2 progresses, the movable guide plate 37 moves toward the first base body 21, and the mutual attachment of the first and second base bodies 21 and 23 is completed at position 1 shown in FIG. 2(C).

In the final contact state shown in FIG. 2(C), if k is the spring constant of the female contact and δ is the displacement per contact, then
The contact force Pl is expressed by the following equation.

In the mounting process of P l= k −·δ (3), the male contact 22 is also elastically deformed. In this mounting process, when k is the spring constant of the male contact, the contact force P2 during the mounting process is expressed by the following formula (4): k gradually increases and becomes -■ at the limit. The state is the final installed state, in which case P,=Pt, and equation (4) matches equation (3).

During the installation process, pg < p, and until just before the installation is completed when the wedge angle θ becomes sufficiently small, the contact force P2
can be kept low.

Therefore, it is possible to reduce the value of the insertion force F shown in equation 11 during the attachment process.In addition, in the final attachment state, the contact force is as large as the normal one, and is stable and strong. Installation is achieved.

Furthermore, since the male contact 22 is formed into a thin plate shape,
It is possible to make the connector thinner, and the overall size can also be reduced. FIG. 6 shows the depth of engagement D between the male and female contacts, which was carried out by the inventors for the embodiment of this invention.
This is an actual measurement example showing the relationship between P and insertion force P, and shows that it is possible to smoothly attach the connector with a low insertion force.

As a result of actual measurements by the inventors, the maximum value P of the insertion force of the present invention shown in FIG. 6 is P1''#1 with respect to the maximum value FIIla of the insertion force F of the conventional connector shown in FIG. /2
It was confirmed that there is a relationship of F tsax, and it is clear that the insertion force is significantly reduced compared to the conventional one.

In the embodiment, a structure was described in which the male contact was disposed protruding from the first base body and the female contact was housed in the second base body, but the male contact was housed in the first base body,
A configuration in which the female contact is disposed protruding from the second base body is also possible.

"Effects of the Invention" As explained in detail above, according to the present invention, the insertion force of the male contact into the female contact can be significantly reduced, and even a multi-core structure can be smoothly installed with low insertion force. Moreover, it becomes possible to provide a connector that can also realize miniaturization of the whole.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the configuration of the main parts of an embodiment of the present invention;
2(A), 2(B), and 2(C) are sectional views showing the mounting process in the embodiment of the present invention, FIG. 3 is a perspective view showing the main structure of the male contact in the embodiment of the present invention, and 4. 5 is a side view showing the main structure of a male contact in an embodiment of the invention, FIG. 5 is a side view showing the structure of a main part of a female contact in an embodiment of the invention, and FIG. A diagram showing the relationship between the mating depth D and insertion force P between male and female contacts, Figure 7 is a sectional view showing the configuration of a conventionally used connector, and Figure 8 is a conventionally used connector. Figure 9 showing the relationship between the mating depth D and insertion force F of the male and female contacts in FIG.
The figure is a diagram showing a state of contact between a male contact and a female contact. : second base body, 24: female contact, 26: first elastic contact piece, 27: second elastic contact piece, 28: first narrow piece, 29: second narrow piece, 30-1゜30-2: M song section,
35: Elastic clamping part, 37: Movable guide plate, 38: Opening, 3
8T: Taper.

Claims (1)

[Scope of Claims] A male contact is attached to a first base body, a female contact is attached to a second base body, and the male contact is inserted into the female contact by mounting the first and second base bodies. In the connector for making an electrical connection, the male contact includes first and second elastic contact pieces that face each other in close proximity, and the width of the first and second elastic contact pieces is narrowed at the tip side. first and second narrow strip portions are formed, respectively, the narrow strip portions are configured to lie on the same plane at their tips, and the female contact has first and second narrow strip portions disposed opposite to each other. A second elastic holding piece is provided on the distal end side of the first and second elastic holding pieces, and the distance between opposing surfaces is narrower than the outer width of the first and second elastic contact pieces facing each other. A connector characterized in that an elastic clamping portion is formed.