JPH0878110A - Electric connector - Google Patents

Abstract

PURPOSE: To increase the allowable elastic deformation amount of a contact and at the same time make the contact small in a pressure contact interposing electric connector. CONSTITUTION: A contact 15 of an electric connector 10 has an almost S-shaped elastic part 15c between a holding part 15a held with an insulating housing 11 and a contact part 15b projecting from two main surfaces 12, 13 of the insulating housing 11. The elastic part 15c has two curved parts of a first curved part 15d and a second curved part 15e formed in one plane, and the width of each part is formed so that a part producing large stress in interposing is made wide and a part producing small stress is made narrow.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to electrical connectors, especially ICs.
Electricity that is sandwiched between two facing plate-shaped bodies such as a chip carrier and a printed wiring board, and electrically connects corresponding lands (connection pads) of the two plate-shaped bodies to be connected via contacts. It is about connectors.

[0002]

2. Description of the Related Art An electrical connector of this type (hereinafter, sometimes referred to as "pressure contact pinching type electrical connector") has two opposing connectors, as disclosed in Japanese Patent Laid-Open No. 63-43279.
An insulating housing having two main surfaces facing the connection surface of each plate when sandwiched between two connected plate-shaped bodies and having a plurality of contact accommodating chambers extending between the two main surfaces arranged; , A plurality of contacts respectively accommodated in the respective contact accommodating chambers. Each contact has a holding portion fixed to the insulating housing and two contact portions protruding from the two main surfaces of the insulating housing, one of the two contact portions being on the land of one plate-shaped body. The other lands contact the lands of the other plate-like body to electrically connect the corresponding lands of the two plate-like bodies.

Further, between the holding portion and the contact portion of each contact, when the contact portion abuts against the land and is pressed, the contact portion is elastic so as to be displaced inward of the contact accommodating chamber. An elastic portion that deforms is formed.

[0004]

By the way, since there is a case where the plate to be connected is warped due to manufacturing errors or the height of each land is different, contact between each land and each contact may occur. In order to ensure contact with the contact portion, it is desirable to increase the allowable elastic deformation amount of the elastic portion and increase the protrusion amount of the contact portion.

In the contact of the above publication, the allowable elastic deformation amount is increased by forming the elastic portion in a U shape, but this is not sufficient. In order to further increase the permissible elastic deformation amount of the U-shaped elastic portion and to secure a contact pressure above a predetermined value, it is necessary to lengthen the elastic portion, which increases the width of the contact. As a result, the size of the electrical connector increases, which is not preferable.

Further, since foreign matters such as dust and oxide film may exist on the land surface of the plate to be connected, in order to ensure the contact between each land and the contact portion of each contact, the elastic portion is required. It is desirable to increase the displacement amount (wiping amount) in the direction perpendicular to the connection direction, which acts as the wiping of the.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to increase the permissible elastic deformation amount of the elastic portion of the contact, to obtain a good connection state, and to reduce the size of the pressure contact pinching type. To provide an electrical connector.

Another object of the present invention is to provide a press-contact pinching type electric connector which can increase the amount of wipe of the contact, obtain a good connection state, and can be downsized.

[0009]

In order to achieve the above object, the electrical connector of the present invention is provided with a first contact in a plane between a holding portion of each contact formed by punching a metal plate and each contact portion. A substantially S-shaped elastic portion having two bending portions, that is, a bending portion and a second bending portion, is provided respectively, and when the substantially S-shaped elastic portion is clamped, that is, the electric connector is pressed and clamped between the plate members to be connected, the elastic portion Is deformed, the portion where the stress is large is widened and the portion where the stress is small is narrowed.

Further, in order to achieve the above-mentioned other object, another electrical connector of the present invention is such that a first portion is formed in a plane between a holding portion of each contact formed by punching a metal plate and each contact portion. A substantially S-shaped elastic portion having two bending portions, that is, a bending portion and a second bending portion, is provided, and a distance in a direction perpendicular to a connecting direction between the fixing point of this elastic portion and the contact portion is defined as a fixing point. When the parameter is a value divided by the distance in the direction perpendicular to the connecting direction with the second curved portion, the elastic portion is formed to have a dimension such that this parameter falls between 0.75 and 2.0. To do.

[0011]

According to the electrical connector of the present invention, there are substantially two curved portions, a first curved portion and a second curved portion, in one plane between the holding portion of each contact and each contact portion. By providing each S-shaped elastic portion and widening a portion of the substantially S-shaped elastic portion where a large stress is generated during clamping, and narrowing a portion where the stress is small, the connection is performed without increasing the stress and the connector width. It is possible to efficiently increase the allowable elastic deformation amount in the direction.
As described above, according to the present invention, since it is possible to increase the amount of protrusion of the contact portion of each contact while reducing the size of the electrical connector, it is possible to reduce the warp of the connected plate-like body and the height error between the lands. Without being affected, it is possible to always ensure a good connection state with each land of the plate-shaped body to be connected, and it is possible to improve the connection reliability.

Further, according to another electrical connector of the present invention, the two bending portions, that is, the first bending portion and the second bending portion are formed in one plane between the holding portion of each contact and each contact portion. Each of the S-shaped elastic portions is provided, and the distance in the direction perpendicular to the connecting direction between the fixing point and the contact portion of the elastic portion is defined as the distance perpendicular to the connecting direction between the fixing point and the second bending portion. When the value divided by the distance is used as a parameter, by forming the elastic part in such a dimension that this parameter falls between 0.75 and 2.0, it acts not only as displacement in the connecting direction but also as wiping. It is possible to efficiently increase the displacement in the vertical direction. As described above, according to the present invention, since it is possible to obtain a sufficient wipe amount while achieving downsizing of the electrical connector, even when foreign matter such as dust or an oxide film is present on the land surface of the connected plate-like body, A good connection state with each land of the plate-like body to be connected can always be ensured, and the reliability of connection can be improved.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a schematic structure of an electric connector and a plate member to be connected according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the electric connector shown in FIG.

As shown in FIG. 1, the electrical connector of this embodiment.
In the insulating housing 11 of 10, a plurality of slit-shaped contact accommodating chambers 14 extending between two substantially parallel main surfaces (upper surface and lower surface in the drawing) 12 and 13 are arranged. The contacts 15 are housed and held respectively.

As shown in FIG. 2, the contact 15 has a holding portion 15a which is press-fitted and held in a concave press-fitting portion 11a formed integrally with the insulating housing 11 in the contact accommodating chamber 14.
And the contact parts 15 protruding from the two main surfaces 12 and 13, respectively.
b, and a substantially S-shaped elastic portion 15c formed between the holding portion 15a and each contact portion 15b. The elastic portion 15c has two curved portions, that is, a first curved portion 15d and a second curved portion 15e formed in one plane, and the width of each portion is such that when it is clamped, that is, two connected plate shapes. A portion having a large stress generated when it is sandwiched between the bodies 20 and deformed is formed wide, and a portion having a small stress is formed narrow. In this embodiment, since the elastic portion 15c is formed in such a shape, the allowable elastic deformation amount of the elastic portion 15c is greatly increased as compared with the conventional structure, and the allowable displacement amount of the contact portion 15b in the vertical direction is increased. Since (the maximum displaceable amount in the vertical direction of the contact portion 15b within the elastic region of the elastic portion 15c) is large, the contact portion 15
The amount of protrusion of b from the main surfaces 12 and 13 is larger than that of the conventional structure. As a result, the warp of the plate member 20 to be connected and
It is not affected by the difference in height between 21 and can always maintain a good connection.

Further, in this embodiment, the fixing point of the elastic portion 15c
15f and _the distance L ₁ of the connecting direction of the contact portion 15b direction perpendicular to the (vertical direction in FIG. 2) (left-right direction in FIG. 2), with respect to the connection direction of the fixed point 15f and the second curved portion 15e by dividing the value when a parameter in a direction perpendicular distance L ₂ Te, the elastic portion 15c is formed into a shape such as this parameter falls between 0.75 to 0.2. This allows
Contact part 15 in a direction perpendicular to the connecting direction, which acts as wiping when the contact 15 is connected to the other side
The displacement of b is larger than that of the conventional structure. Therefore, even if foreign matter such as dust or an oxide film is present on the surface of the land 21, a stable contact state can be secured.

The contact portion when the above parameters are changed
FIG. 3 is a graph showing the results of examining how the wipe amount of 15b changes. The abscissa of FIG. 3 shows the value of the above parameter, and the ordinate shows the value of the ratio when the wipe amount when the parameter is 1 is the reference value (1). As is clear from FIG. 3, when the parameter is less than 0.75, the wipe amount is greatly reduced. It should be noted that the wipe amount does not decrease so much even if the parameter becomes larger than 2, but if the parameter becomes larger than 2, the contact becomes large, which is not suitable for downsizing the electrical connector.

In the present embodiment, the number of contact points 16 of the contact portion 15b of the contact 15 is one, but there may be a plurality of contact points 16 as in the contact modification 15A shown in FIG. If a plurality of contact points 16 are provided, a stable contact state can be secured even when foreign matter such as dust exists on the land surface.

For soft lands (for example, solder lands) made of a material, as shown in FIG. It is possible to prevent slipping in and maintain a stable contact state.

On the other hand, the connected plate-like body of this embodiment shown in FIG.
Reference numeral 20 denotes a printed wiring board (PC board), which has a plurality of lands 21 aligned in the center of the surface. Although the surface side of the upper connected plate-like body 20 is not shown in FIG. 1, it has the same configuration as the lower connected plate-like body 20. In addition, illustration of printed wiring and the like is omitted in FIG.

The electrical connector 10 includes two plate-shaped members 20 to be connected.
Between the bolts 31a and nuts 31b.
Each of the connected plate-like bodies 20 is assembled. In addition,
As shown in FIG. 1, the insulating housing 11 of the electric connector 10 is formed with a positioning boss 17 and a bolt insertion hole 18, and the connected plate member 20 corresponds to the bolt insertion hole 23 and the boss 17. And a hole 24 for positioning is formed.

In the electrical connector 10 sandwiched between the two plate-shaped members 20 to be connected, the contact portions 15c of the contacts 15 contact the corresponding lands 21 respectively, and the corresponding lands 21 are electrically connected to each other. Connecting.

As shown in FIG. 6, the insulating housing 11
You may make it provide the leg part 19 on the upper and lower sides. Figure 6
6A and 6B are views showing a modified example of the electric connector, in which FIG. 9A shows a state before assembly and FIG. 9B shows a state after assembly. The leg portion 19 may be formed separately from the insulating housing 11 and fixed to the insulating housing 11 later, or may be formed integrally with the insulating housing 11. Further, the leg portions 19 may be provided with elasticity so that they can be repeatedly used. By providing the leg portion 19 as described above, it is possible to prevent the contact portion 15b of the contact 15 from being damaged during the mounting work, and it is possible to accurately mount the contact portion 15b at a predetermined installation position. It is also possible to automate the placement work (without the legs 19, the contact part of the contact 15
Electrical connector because 15b protrudes from the main surfaces 12 and 13
When the 10 is placed, the insulating housing 11 tilts, making it difficult to perform accurate positioning).

Although one embodiment of the present invention has been described above, the electric connector of the present invention is not limited to the specific mode of this embodiment, and it goes without saying that various modifications can be made.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an electrical connector and a plate member to be connected according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the electric connector shown in FIG.

FIG. 3 is a diagram showing a relationship between a parameter and a wipe amount.

FIG. 4 is a partial view of a contact having multiple contact points.

FIG. 5 is a partial view of a contact having a shoulder portion for preventing intrusion.

FIG. 6 is a diagram showing an electrical connector having legs.

[Explanation of symbols]

 10, 10A Electric connector 11 Insulation housing 12, 13 Main surface 14 Contact receiving chamber 15, 15A, 15B Contact 15a Holding part 15b Contact part 15c Elastic part 15d First bending part 15e Second bending part 15f Fixing point 20 Connected plate shape Body 21 land

Claims (2)

[Claims] 1. An insulating housing having two main surfaces and in which a plurality of contact accommodating chambers extending between the two main surfaces are arranged, and an insulating housing respectively received in the contact accommodating chambers and fixed to the insulating housing. A plurality of contacts each having a holding portion and two contact portions respectively projecting from the two main surfaces, and the corresponding lands sandwiched between the lands of the connected plate-shaped bodies facing each other are mutually connected by the contacts. In the electrical connector to be connected, each of the contacts is formed by punching out a metal plate, and two curved portions of a first curved portion and a second curved portion are formed in a plane between the holding portion and each of the contact portions. A substantially S-shaped elastic portion is provided, and each width of the elastic portion is formed such that a portion having a large stress generated during clamping is wide and a portion having a small stress is narrow. Electrical connector, characterized in that. 2. An insulating housing having two main surfaces and arranging a plurality of contact receiving chambers extending between the two main surfaces, and an insulating housing respectively received in the contact receiving chambers and fixed to the insulating housing. A plurality of contacts each having a holding portion and two contact portions respectively projecting from the two main surfaces, and the corresponding lands sandwiched between the lands of the connected plate-shaped bodies facing each other are mutually connected by the contacts. In the electrical connector to be connected, each of the contacts is formed by punching out a metal plate, and two curved portions of a first curved portion and a second curved portion are formed in a plane between the holding portion and each of the contact portions. A substantially S-shaped elastic portion having a fixed point of the elastic portion and a distance in a direction perpendicular to the connecting direction of the contact portion, and the fixed point and the second bending portion. When the parameter value obtained by dividing the distance in the vertical direction to the connection direction, this parameter
The electrical connector, wherein the elastic portion is formed so as to be between 0.75 and 2.0.