JPH0240824A - High-frequency relay - Google Patents

Abstract

PURPOSE:To make it possible to carry out the assembling of a fixed contact member and a movable contact member which requires a high accuracy accurately and easily by chamfering a tapering-off tapered surface at the upper end of the fixed contact member at the time when the fixed contact member is planted. CONSTITUTION:Fixing contact members 12 to 14 opposing to movable members 36 and 37 are composed to chamfer taping-off tapered surfaces at the upper ends, while they are planted to a base 10. As a result, the upper ends of the fixing contact members 12 to 14 can be formed into a thin plate form, and the movable contact members 36 and 37 can be assembled smoothly without contacting to steps of both members when the movable contact members 36 and 37 are installed along the fixing contact members 12 to 14 from the upper side. Consequently, the assembling work which requires a high accuracy can be carried out accurately and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a high frequency relay with excellent assembly workability of a contact mechanism.

(Summary of the Invention) The present invention provides a fixed contact member which is implanted in a base and has a movable contact member arranged close to and facing the upper end of the fixed contact member.
By chamfering the tapered surface when installing the fixed contact member, the assembly work of the contact mechanism in which the movable contact member is assembled from above the fixed contact member close to the fixed contact member can be accurately and easily performed.

(Prior art and its problems) In order to obtain high isolation, high frequency relays
For example, as shown in Japanese Utility Model Application Laid-Open No. 60-123852, a double break contact structure is adopted and the contact intervals are set wide.

This will now be explained in detail with reference to FIGS. 6 to 8.

That is, what is shown in the figure has an electromagnetic block 2 and a contact block 3 fixed on a non-conductive base 1, and a movable iron piece is attached to the magnetic pole surface (path shown) as the coil 2a in the electromagnetic block 2 is excited or demagnetized. 4 come into contact with and separate from each other, and the displacement of the movable iron piece 4 presses and rotates the movable contact member 7 constituting the contact block 3 by the return spring 5 . It is an electromagnetic relay configured to connect and disconnect from fixed contact members 9a to 9c provided, and is mounted on a printed circuit board that is a high frequency circuit board.
It is used as a high-frequency relay to open and close the current circuit.

However, the contact mechanism in this high frequency relay is
As shown in the figure, a fixed contact member 9 is attached to one side of the base.
A to 9c are planted in a straight line in the center for a common terminal, at regular intervals for normally closed terminals, and normally open terminals.
The fixed contact members 9a to 9c are insulated from each other and protrude into a shield case 8 which is pressed onto the base 1.

On the other hand, a rotating member 7a constituting the movable contact member 7 is rotatably attached to the hinge piece 8a of the shield case 8, and is arranged at different levels in the thickness direction below the rotating member 7a. Two contact members 7b and 7c are installed across the fixed contact members 9a to 9c installed in a straight line.

That is, one contact member 7b is interposed between the fixed contact members 9a, 9b for common and normally closed and the ground contact 8b inside the shield case 8, and the other contact member 7c is for common and normally open. It is interposed between the fixed contact members 9a, 9c and the ground contact 80 inside the shield case 8, and is displaced as the coil is energized or demagnetized (see FIG. 8).

Therefore, the dimensions of each member are as follows: fixed contact members 9a to 9c have a thickness of 0.4 mm, and movable contact members 7b and 7c have a thickness of 0.1 mm.
mm, and the fixed contact members 9a to 9c and the movable contact members 7b and 7c are arranged close to each other so that the distance between them is 0.1 ml.

Therefore, during assembly work, the movable contact member 7b-
The fixed contact members 9a to 9c, each having a thickness of 0.4 mm, must be assembled within the 0.6 mm spacing between the 7c, so that the fixed contact members 9a to 9c have a spacing of 0.1 mm from each other, and this type of assembly work requires high precision. I needed it.

If this accuracy cannot be obtained or the fixed contact member 9a
If cracks or the like occur at the upper end of ~9c, the lower end of movable contact members 7b and 7c, which are assembled from above,
The fixed contact members 9a to 9c come into contact with the upper ends of the fixed contact members 9a to 9c and are pressed, which not only prevents them from being properly assembled, but also causes the problem that the movable contact members 7b and 7c, each having a thickness of 0.1 mm, become deformed. are doing.

(Object of the Invention) This invention was made in view of the above-mentioned problems, and its purpose is to accurately assemble fixed contact members and movable contact members, which require high precision. The present invention also relates to a high frequency relay that can be easily implemented.

(Structure and Effect of the Invention) In order to achieve the above objects, the present invention fixes an electromagnetic block and a contact block on a non-conductive base, and a pair of movable contact members constituting the contact block, In an electromagnetic relay that is disposed facing each other across a fixed contact member planted in the base and alternately connects and separates from the fixed contact member by energizing or demagnetizing the coil, the upper end of the fixed contact member facing the movable contact member ,
It is characterized in that the fixed contact member is installed and the tapered surface is chamfered.

That is, in the present invention, the tapered surface is chamfered at the upper end of the fixed contact member that is implanted in the base and faces the movable contact member, so that the upper end of the fixed contact member is formed into a thin plate shape. Even when the movable contact member is assembled from above along the fixed contact member, the ends of the movable contact member do not touch each other and can be assembled smoothly, making the assembly process accurate and easy. can.

Further, since the chamfering of the upper end portion is performed at the same time as the fixed contact member is implanted, the chamfering can be performed at a lower cost than when the chamfering is performed again after the fixed contact member is implanted.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is an exploded perspective view showing an example of a high frequency relay according to the present invention, and in the figure, reference numeral 10 indicates a base made of an electrically insulating material such as synthetic resin.

The base 10 has an electromagnetic block 20, which will be described later, on its upper surface.
A fitting uneven part 10a is formed to place and fix the shield case 30, and a fixed contact member 12° normally closed which forms a common terminal is formed at the longitudinal direction 14 on which the shield case 30 is placed. The fixed contact member 13 forming a terminal and the fixed contact member 14 forming a normally open terminal are
Each of them is formed to have a thickness of 0.4 mm, and is planted in a straight line at regular intervals with the fixed contact member 12 in the middle.

Further, the electromagnetic block 20 includes a coil 21. which has a magnetic pole surface 21a. L-shaped yoke 22 surrounding the coil 21. It is composed of a movable iron piece 23 and the like that contacts the magnetic pole surface 21a as the coil 21 is excited or demagnetized.

A movable contact member 31 constituting the contact block 30 is formed into a plate shape from an electrically insulating material such as a synthetic resin, and has a rotating member 32 having shaft-like protrusions 33 on both end faces of its upper part.
At the support portion 34.35 provided on the lower side, a contact member 36.37 in the form of a strip formed with a thickness of 0.1 mm
are fixed in different steps in the thickness direction.

The movable contact member 31 is urged by a return spring 38, which is entirely formed of a metal plate having appropriate spring properties, and is rotatably attached to the shield case 40.

Further, two contact members 36 and 37 disposed at different levels in the thickness direction below the rotating member 32 are assembled so as to straddle the fixed contact members 12 to 14 installed in a straight line.

That is, one contact member 36 is interposed between the common and normally closed fixed contact members 12.13 and the ground contact 41 outside the shield case 40, and the other contact member 37 is
It is interposed between the common and normally open fixed contact members 12, 14 and the ground contact 42 inside the shield case 40, and is displaced as the coil 21 is energized or demagnetized (see FIG. 3).

15 is a tapered surface, and this tapered surface 15 is formed to face at least the movable contact members 36 and 37 at the upper end portions of the fixed contact members 12 to 14,
As a result, the upper end portions of the fixed contact members 12 to 14 have a thin plate shape.

Next, a method of chamfering the fixed contact member will be explained.

What is shown in FIG. 4 is an explanatory cross-sectional view showing the case of using the punch method.
For example, a fixed contact member 12 cut to a predetermined length is temporarily inserted, and the upper end of the fixed contact member 12 is pressed with a punch 51 having a substantially V-shaped pressing portion, thereby attaching the fixed contact member 12 to the base. 10, and its upper end is chamfered. In this case, chamfering is performed in a shape as shown in FIG. 2(a).

Next, what is shown in FIG. 5 is an explanatory cross-sectional view showing the case of one method using a double-cut cutter. Similarly to the above, after fixing the base 10 on the jig 50, The material is temporarily inserted into the mounting hole 10b formed in the base 10, and this continuous material is chucked.After that, the placement receiver of the base 10 raises the jig 50, and the continuous material is inserted into the mounting hole 10b of the base 10. A fixed contact member 12 of a predetermined length with a chamfered upper end is implanted on the base 10 by forcibly press-fitting it into the mounting hole tab and cutting it at a predetermined position with a cutter 53 having a V-shaped blade. Set up In this case, chamfering as shown in FIG. 2(b) is performed.

According to such a chamfering method, the fixed contact members 12 to 1
The upper end of the movable contact member 36.3 can be chamfered at the same time as the movable contact member 36.
Chamfering can be performed only at the necessary locations facing 7.

Note that chamfering the entire circumference of the upper end of each fixed contact member 12 to 14 after installing the fixed contact members 12 to 14 increases the cost and also
Since there is a risk that the bevel may be bent carelessly by the seat, etc., it is cost-effective to chamfer the bevel at the same time as planting.

As explained above, the present invention is configured such that the upper end of the fixed contact member that is implanted in the base and faces the movable contact member is chamfered with a tapered surface. It can be formed into a thin plate shape, and even when the movable contact member is assembled from above along the fixed contact member, the stepped parts can be assembled smoothly without contacting each other, so high precision is required. Assembly work can be performed accurately and easily.

Further, since the chamfering of the upper end portion is performed at the same time as the fixed contact member is implanted, the chamfering can be performed at a lower cost than when the chamfering is performed again after the fixed contact member is implanted.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an example of a high frequency relay according to the present invention, FIGS. 2(a) and (b) are perspective views showing the upper end of a fixed contact member according to the present invention, and FIG. 3 is a shield case. 4 and 5 are explanatory sectional views showing the chamfering method according to the present invention, FIG. 6 is a perspective view showing a conventional high frequency relay, and FIG. 7 is a conventional high frequency relay. FIG. 1 is a partially exploded perspective view showing a contact mechanism in a relay, and FIG. 2 is a plan view showing a contact mechanism inside a shield case in a conventional high-frequency relay. 10...Base 12-14...Fixed contact member 15...Tapered surface 20...Electromagnetic block 30...Shield case 36.37...Movable contact member

Claims (1)

[Claims] 1. An electromagnetic block and a contact block are fixed on a non-conductive base, and a pair of movable contact members constituting the contact block face each other across a fixed contact member implanted in the base. In an electromagnetic relay that is arranged and alternately connects and disconnects from a fixed contact member by energizing or demagnetizing a coil, at the upper end of the fixed contact member facing the movable contact member,
A high-frequency relay characterized by a fixed contact member and a chamfered tapered surface.