JPH03110725A - Rivet contact - Google Patents

Abstract

PURPOSE:To enhance the contact reliability of a rivet contact by reducing the area of the contact touching face of a head portion, and forming a network of flat projecting portions on the contact touching face. CONSTITUTION:The area of the contact touching face of a head portion 6 is reduced and a network of flat projecting portions 7 are formed on the contact touching face; e.g. a network of numerous square projecting portions 7 of 0.1mm side by 0.1mm height are flatly formed on the small-area contact touching face of a disc portion 6a of 0.6mm outside diameter provided at the upper end of the stepped head portion 6. Foreign material adhering to a contact surface is thus put in and escaped through numerous linear channels formed between the network of flat projecting portions even with a wiping phenomenon and therefore imperfect contact would not occur, and in addition, midpoint contact is achieved during opening and closing of the contact so that contact reliability is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in rivet contacts used in contact opening/closing mechanisms of various electrical devices.

(Prior art) Most conventional rivet contacts have button-shaped or disk-shaped heads, with button-shaped rivet contacts on the movable side and disc-shaped rivet contacts on the fixed side. Often used.

(Problem to be Solved by the Invention) By the way, when the rivet contact is used as described above, the head button-shaped rivet contact l on the movable side shifts laterally when opening and closing the contact, as shown by the arrow in Fig. 5. When a wiping phenomenon occurs that causes contact with the fixed-side disk-shaped rivet contacts 2, a lump of foreign matter 3 adheres to the contact surface, and if the contact is opened or closed while the foreign matter is pinched, a contact failure may occur. , the contact resistance became unstable.

Therefore, the present invention aims to provide a rivet contact that prevents foreign matter from accumulating on the contact surface even if a wiping phenomenon occurs, thereby preventing contact failure or unstable contact resistance. It is something.

(Means for Solving the Problems) In order to solve the above problems, the rivet contact of the present invention has a small contact surface of the head and a flat convex portion formed in a mesh shape on the contact surface. This is a characteristic feature.

(Function) In the rivet contact of the present invention constructed as described above, even if a wiping phenomenon occurs during contact opening/closing used on the movable side of the contact opening/closing mechanism, foreign matter attached to the contact surface is removed by the mesh-like flat convex. Since it escapes by entering the many filament grooves between the parts, there is no possibility that the contact will open or close due to foreign matter being caught between the parts, so there will be no contact failure and no unstable contact resistance. Since the contact surface is small, any foreign matter that enters the linear groove escapes further to the outer circumferential surface, so there is no problem even if the mesh-like flat convex part wears out over a long period of use.

Furthermore, since the rivet contact of the present invention has a mesh-like flat convex portion formed on the contact surface, multi-point contact is achieved when the contact is opened and closed, and contact reliability is improved.

(Example) An example of the rivet contact of the present invention will be described with reference to FIG. 1. The head diameter is 3 mm, the head height is 1 mm, and the leg diameter is 1 mm.
In the rivet contact 5 made of Ag with a height of 5 mm and a leg height of 1.5 mm, the head 6 has a height of 0.2 + n + n each, an outer diameter of 0.6 mm, 1.2 mm, 1.8 mm, 2.
．． 4mm13. A multilayer disc part of 0.0 mm is formed to form a stepped head, and the outer diameter of the upper end of this stepped head 6 is 0.6 m.
The -side 0.
A large number of rectangular convex portions 7 each having a diameter of 1 mm and a height of 0.1 mm are formed in a flat mesh shape.

Next, another embodiment will be explained with reference to FIG.
．． 5mm, head height 1.2mm, leg diameter 2.0mm, leg height 2. In the rivet contact 8 made of Omm Ag alloy, the head 9 has an upper surface diameter of 3.0 mm and a lower surface diameter of 3.5 mm.
, is formed into a truncated conical shape with a height f and 2 mm, and the contact surface of the small area of the head 9 of this truncated conical shape has - sides o, 1
A large number of diamond-shaped convex portions IO with a height of 0.1 mm and a height of 0.1 mm are formed in a flat mesh shape.

Rivet contact 5.8 of each embodiment configured as described above
When opening and closing contacts used on the movable side of the contact opening/closing mechanism, a wiping phenomenon occurs in which the contacts shift laterally and contact the head disc-shaped rivet contact 2 on the fixed side, as shown by the arrows in Figures 3 and 4. Even if it occurs, the foreign matter attached to the contact surface is the mesh-like flat convex part 7 and the many linear grooves between the IOs? Since it enters a and 10a and escapes, there is no possibility that the contact will be opened or closed by pinching a foreign object. Therefore, contact failure does not occur, and contact resistance does not become unstable.

On the other hand, since the contact surfaces of the many filament grooves 7a and 10a are small, foreign particles escape along the stepped portions and tapered surfaces of the outer periphery, so that the mesh-like flat convex portions 7 and 10 remain for a long period of time. There is no problem even if it wears out due to use.

Further, the rivet contact of the present invention has a mesh-like flat convex portion 7, l formed on the contact contact surface during the above-described contact opening/closing.
O makes multi-point contact with the head disc-shaped rivet contact 2 on the stationary side, improving contact reliability.

(Effects of the Invention) As can be seen from the above explanation, the rivet contact of the present invention does not accumulate foreign matter attached to the contact surface even if a wiping phenomenon occurs during contact opening/closing, so there is no possibility of foreign matter being pinched and brought into contact. No contact failure occurs, and contact resistance does not become unstable. Furthermore, since multi-point contact is made when opening and closing the contacts, contact reliability is improved.

[Brief explanation of drawings]

1 and 2 are perspective views showing the rivet contact of the present invention, respectively. FIGS. 3 and 4 are views showing the wiping phenomenon when the rivet contact of FIGS. 1 and 2 is opened and closed. The figure shows the wiping phenomenon of a conventional rivet contact when the contact is opened and closed.

Claims (1)

[Claims] 1. A rivet contact characterized in that the area of the contact surface of the head of the rivet contact is reduced and a flat convex portion is formed in the shape of a mesh on the contact surface.