JPH09171869A - Contact - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact constituted in such a manner that a movable terminal is tilted to cause the wiping in the contact point when the movable terminal is pressed into contact with the contact part lower surface of an electric part. SOLUTION: This contact 3 has a movable terminal 4 being in contact with the lower surface of the contact part 2 of an electric part 1' and an elastic member 5 for imparting a push-up force to the movable terminal 4 to press it into contact with the contact part 2. A stopper 11 for arresting the lowering of the movable terminal 4 is provided in a position off from the perpendicular passing the contact point between the movable terminal 4 and the contact part 2. When a pressdown force is added to the movable terminal. 4 through the contact part 2, the movable contact 3 is tilted with the stopper 11 as support point to cause the wiping in the contact part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact of a type which makes pressure contact with the lower surface of a contact portion of an electric component represented by a BGA type IC.

[0002]

2. Description of the Related Art In an electric component such as a BGA type IC having a large number of contact portions arranged on its lower surface, a contact of a connector is elastically pressure-contacted with the lower surface of the contact portion.

This contact is provided with a movable terminal which comes into contact with the lower surface of the contact portion substantially vertically and an elastic member (coil) for receiving the movable terminal, and the movable terminal is elastically pushed down through the contact portion. The member is compressed, and the reaction force exerts a push-up force to the movable terminal to bring the contact portion into pressure contact.

[0004]

However, since the movable terminal moves up and down linearly on the perpendicular line passing through the contact point with the contact point and is vertically pressed against the lower surface of the contact point, the wiping effect at the contact point is obtained. Can hardly expect.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and when the movable terminal comes into pressure contact with the contact portion of the electric component, the movable terminal is tilted to make the contact. It is configured to cause wiping at points.

As a means for inducing this tilting, in a contact composed of the movable terminal and an elastic member for receiving the movable terminal, a stopper provided at a position deviated from the perpendicular line prevents the movable terminal from descending, The wiping effect can be expected by an extremely simple method in which the pressing force applied to the movable terminal is converted into tilting power by blocking, and the stopper is attached to the connector body side.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric component 1'typified by a BGA type IC has a large number of contact portions 2 on its lower surface, and the lower surface of the contact portion 2 is pressed against a connector body 1 for this electric component 1 '. Have the contact 3 arranged.

The contact 3 comprises a movable terminal 4 which comes into pressure contact with the lower surface of the contact portion 2, and an elastic member 5 which applies a pushing force to the movable terminal to bring it into pressure contact with the movable terminal 4.

The elastic member 5 has the movable terminal 4 at the upper end thereof.
And the male terminals 6 used for connection of a wiring board or the like are placed at the lower end of the package, and the three terminals are formed as separate parts and placed in contact with each other.

In other words, the elastic member 5 is interposed between the movable terminal 4 and the male terminal 6, and the movable terminal 4 is brought into contact with the upper end of the elastic member 5 to bring them into contact with each other. 6 is contacted and brought into contact.

The movable terminal 4 has a pin terminal portion 4a and a seat plate portion 4b which is continuously provided at the lower end of the pin terminal portion 4a and extends around the pin terminal portion 4a. The pin terminal portion 4a stands upright substantially at the center of the seat plate portion 4b, and the center portion of the lower surface of the seat plate portion 4b is loaded on the upper end surface of the elastic member 5 and brought into contact therewith.

On the other hand, the male terminal 6 has a seat plate portion 6b at the upper end, and leg pieces 6a are continuously provided downward from the lower surface of the seat plate portion 6b. The leg piece 6a is vertically provided at the center of the seat plate portion 6b, and the elastic member 5 is loaded on the upper surface of the seat plate portion 6b and brought into contact therewith.

As an example, the elastic member 5 is formed of a wad-shaped conductor in the shape of a rod or a lump by bending a single or plural conductive wires at random. This quad-shaped conductor is disclosed, for example, in Japanese Patent Application Laid-Open No. 3-506094.

As another example, the elastic member 5 is made of conductive rubber in a rod shape, a lump shape, or a plate shape.

The elastic member 5 is held in a vertical hole 7 formed in the connector body 1 made of an insulating material, and the seat plate 6b of the male terminal 6 is supported on the inner bottom surface of the lower bottom wall of the vertical hole 7. , Leg 6
b through the through hole provided in the lower bottom wall to project downward from the lower surface of the connector body 1, and press the leg piece 6b into the through hole inner wall,
The male terminal 6 is fixed to the connector body 1.

On the other hand, the movable terminal 4 accommodates a seat plate portion 4b in an enlarged accommodating portion 7a which is continuously provided at the upper end of the vertical hole 7, the lower surface of which is loaded on the upper end surface of the elastic member 5 and the pin terminal. Through hole 1 in which the portion 4a is provided in the upper bottom wall 9 of the accommodation portion 7a
It is loosely inserted into 0 and protrudes upward from the upper surface of the connector body 1, and is tiltable under the restriction of the through hole 10.

The movable terminal 4 presses the tip surface of the pin terminal portion 4a protruding upward through the through hole 10 to the contact portion 2 of the electric component 1 ', and at the time of this pressure contact, the lower surface of the contact portion 2 is contacted. A slight tilt along it causes wiping at the contact point.

As means for inducing the tilting and wiping of the movable terminal 4, a stopper 11 for preventing the movable terminal 4 from descending is provided at a position deviating from a perpendicular line passing through the contact point between the movable terminal 4 and the contact portion 2. .

The contact portion 2 is attached to the pin terminal 4a of the movable terminal 4.
When a vertical pressing force is applied from the side, the movable terminal 4
Is tilted to the opposite side of the stopper 11 with the stopper 11 as a fulcrum while maintaining the pressure contact state with the contact portion 2.
Due to this tilting, the lower surface of the contact portion 2 slides by a certain amount, and the above wiping effect is brought about.

As the stopper 11, for example, as shown in FIG.
As shown in FIG. 2, a step portion 11a is formed on one side of the housing portion 7a, that is, one side of the upper end portion of the vertical hole 7, and the step portion 11a is movable in an engagement space formed between the step portion 11a and the upper bottom wall 9. The locking portion 4c of the terminal 4 is received and brought into a locked state on the stepped portion 11a.

1 and 2, the engaging portion 4c is formed by utilizing the seat plate portion 4b, and it is used as a contact means with the elastic member 5 and a retaining means for preventing the withdrawal from the vertical hole 7. It also serves as the locking portion 4c.

As shown in FIG. 1, the locking portion 4c of the movable terminal 4 is interposed between the stepped portion 11a and the upper bottom wall 9 to prevent the movable terminal 4 from descending and allow tilting. I have to. In order to make this tilting smooth, the upper surface of the seat plate portion 4b is formed as a slanted surface 4d from the center downward, and the slanted surface 4
The upper surface of the base side of d is the inner surface of the upper bottom wall 9, for example, the through hole 1.
The lower end opening edge of No. 0 supports the lower end side lower surface on the stepped portion 11a.

As another example of the stopper 11, as shown in FIGS. 3 and 4, the short-circuit piece 8 is extended from one end of the seat plate portion 6b of the male terminal 6 upward along the inner surface of the vertical hole 7. The stepped portion 11b that supports the lower surface of the engaging portion 4c at the upper end of the short-circuit piece 8 and the lower surface at one end of the seat plate portion 4b in the embodiment is formed.

The movable terminal 4, the elastic member 5 and the male terminal 6 are arranged on the same axis with the above arrangement, in other words, the contact portion 2 of the electric component 1'and the pin terminal portion 4a of the movable terminal 4. It is arranged on a perpendicular line passing through the contact point, and the step portions 11a and 11b which are the stoppers 11 are arranged at positions deviating from the perpendicular line,
When a pressing force is applied to the movable terminal 4, the movable terminal 4 is prevented from descending by the step portions 11a and 11b, and tilts to the side opposite to the step portions 11a and 11b as shown in FIGS.
This tilt amount is limited by the inner diameter of the through hole 10 in which the pin terminal portion 4a is loosely inserted.

[0025]

According to the present invention, as shown in FIGS. 1 and 3, the contact portion 2 of the electric component body 1 is placed on the tip surface of the pin terminal portion 4a of the movable terminal 4 in the upright state, and the pushing force is applied. , The movable terminal 4 moves to the stopper 1 as shown in FIGS.
The tilting is started with the fulcrum 1 as a fulcrum, and the tilting causes the elastic member 5 to be compressed, and as a reaction thereof, further tilts while pressingly contacting the lower surface of the contact portion to slide a slight amount on the lower surface of the contact portion. As a result, a good wiping effect is induced, and highly reliable contact can be expected.

As a means for inducing the tilting and wiping of the movable terminal 4, a simple method of attaching a stopper 11 such as the stepped portions 11a and 11b to the connector body 1 or the contact 3 effectively achieves the intended purpose. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of the present invention and showing a state in which a connector holds contacts.

FIG. 2 is a cross-sectional view showing a state in which the contact tilts and wiping occurs.

FIG. 3 is a cross-sectional view showing another example of the present invention and showing a state in which a contact is held by a connector.

FIG. 4 is a cross-sectional view showing a state in which the contact is tilted to cause wiping.

[Explanation of symbols]

 1 connector main body 1'electrical part 2 contact part 3 contact 4 movable terminal 4a pin terminal part 4b, 6b seat plate part 4c locking part 4d inclined surface 5 elastic member 6 male terminal 6a leg piece 7 vertical hole 7a accommodating part 8 short circuit Piece 9 Upper bottom wall 10 Through hole 11 Stopper 11a, 11b Step portion

Claims (3)

[Claims] 1. A contact comprising a movable terminal that contacts a lower surface of a contact portion of an electric component, and an elastic member that applies a pushing force to the movable terminal to bring the contact portion into pressure contact with the movable terminal. A stopper that prevents the movable terminal from descending is provided at a position deviating from the perpendicular passing through the contact point with
A contact characterized in that when a pressing force is applied to the movable terminal via the contact portion, the movable terminal is tilted with the stopper as a fulcrum to cause wiping at the contact point. 2. The contact according to claim 1, wherein the elastic member is formed of a wad-shaped conductor. 3. The contact according to claim 1, wherein the elastic member is made of conductive rubber.