JP2722693B2 - switch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a switch used for various electronic devices.

2. Description of the Related Art FIGS. 6 to 8 show a conventional switch. Fig. 6 ~
In FIG. 8, 1 has a contact 3a at the movable end and a terminal at the lower end.
A strip-shaped movable contact 3 made of a conductive member having a spring property and having the same number of the movable contacts 3 as a movable contact; a movable contact having a contact 4a at a movable end and a terminal 4b at a lower end; A movable contact 4 which is arranged above the movable contact 3 so that the contacts 3a and 4a are opposed to each other;
A fixed contact 2 having a terminal 2a at a lower end disposed so as to face between the contacts 3a and 4a, and a substantially square-shaped case provided on the upper side. Grooves 1a, 1
a ', the protrusions 1b, 1b' arranged in the longitudinal direction of the movable contacts 3, 4 so as to face the outer side, and projecting upward from the groove 1c of the longitudinal inner wall of the fixed contact 2. A protrusion 1d having a groove 1e, and grooves arranged in parallel on both sides of the fixed contact 2.
1f and 1f '. 5 is a column-shaped projection 5a, 5a 'supported to be swingable in the grooves 1a, 1a' of the case 1, arms 5b, 5b 'inserted into the grooves 1f, 1f', Movable contact
A lever having a movable portion 5c disposed between 3, 4;
Has 5f. 6 is a groove 1e of the case 1 and the lever 5
A tension coil spring 7 having hook portions 6a and 6b engaged with the groove 5d of the case 1 is a cover for accommodating the components together with the case 1, and includes holes 7a and 7 7
a ′ and the projections 5a, 5a ′ of the lever 5
Protrusions 7b and 7b 'are provided so as to be able to swing together with a'.

The operation of the switch configured as described above will be described below.

FIG. 7 shows that the movable contact 4 is pushed down by the movable portion 5f of the lever 5 and the contact 4a is separated from the fixed contact 2. On the contrary, the movable contact 3 changes its contact 3a to the fixed contact 2 by its own spring property.
Indicates a state in which it is in contact with. As shown in FIG. 8, when the operating portion 5f of the lever 5 is depressed, the movable portion 5c swings downward around the protrusions 5a and 5a 'as a fulcrum, so that the movable contact 4 separates the contact 4a by its own spring property. The movable contact 3 is pushed down, and the contact 3 a is separated from the fixed contact 2. Also, when the pressing of the operating portion 5c of the lever 5 is stopped,
The lever 5 returns to the state shown in FIG. 7 by the tension coil spring 6, and a series of operations is completed.

However, in the above-described conventional configuration, the movable contact
Because of the single-sided one-point contact due to their own spring properties, the contact reliability is reduced due to deformation and the like, the movable contact 3 is pressed into the case 1, the fixed contact 2 is pressed, the lever 5 is inserted, and so on.
There has been a problem that the number of production steps is increased because the method of press-fitting the movable contact 4 must be adopted.

An object of the present invention is to solve such a problem.

Means for Solving the Problems In order to solve the above problems, the present invention provides an insulating case in which a common contact having a projection at the upper end and individual contacts arranged in a line on one or both sides thereof are provided. The hole on the top surface formed in the shape of a letter is swingably supported by the protrusion at the upper end of the common contact, and the opposing elastic legs which constantly contact and hold the common contact and the individual contacts are oscillated by swinging. A movable contact piece having an opposing elastic leg which repeats a contact state, a holding state, and a separation state is provided.

Operation Therefore, according to the present invention, by providing opposing elastic legs on the movable contact piece, the fixed contact is elastically clamped from both sides, and a contact mechanism with excellent contact reliability can be obtained. By forming the opposed elastic legs for holding the common contact upward from the lower end of the substantially inverted V-shaped side surface, the combination of the common contact and the movable contact can be easily performed. In addition, as described above, the construction of the contact portion is configured such that only the movable contact piece is inserted into the common contact, so that there is an effect that the number of steps can be reduced.

Embodiment FIGS. 1 to 4 show the configuration of an embodiment of the present invention. Reference numeral 8 denotes a common contact 9 having a protrusion 9a at an upper end and a terminal 9b at a lower end, and is arranged in a row on both sides thereof. Terminal 10
The case 8 is a substantially square case in which the individual contacts 10 and 11 having the contact points 11a and 11a are implanted. The case 8 has a columnar protrusion 8a, 8a 'centered on the same straight line on the outer side, and protrudes from one outer side. The protrusion 8c has a groove 8b. A hole 12a is formed in a substantially inverted V-shape, is formed on a central top surface of the common contact 9 so as to be swingable by the projection 9a, and a substantially inverted V-shaped member which constantly elastically contacts and clamps the common contact 9. The opposing elastic legs 12b as shown in FIG. 4 formed by cutting and bending both sides of the center in a substantially inverted V-shape, and the individual contact points formed by cutting both top faces in the longitudinal direction to form both side faces at both ends.
Opposed elastic legs 12c, 1 that repeats elastic contact, pinching and separation of 10, 11
The movable contact piece 13 having 2d is formed in a substantially inverted shape, and has holes 13a, 13a 'opposed to the side surfaces which are swingably engaged with the projections 8a, 8a' of the case 8, and the movable contact piece 13 has Lever 13 having protrusions 13b, 13c arranged on the inner upper surface for swinging piece 12
The case 1 has a protrusion 13e having a groove 13d protruding from one side in the same direction as the protrusion 8c of the case 1, and an operation portion 13f in the longitudinal direction. Reference numeral 14 denotes a tension coil spring having hook portions 14a and 14b engaged with the groove 8b of the case 8 and the groove 13d of the lever 13, and always applies a biasing force to the lever 13 in a certain direction.

Next, the operation of the above embodiment will be described below. FIG. 2 shows an opposing elastic leg 12d of the movable contact piece 12 by the projection 13c of the lever 13.
Indicates a state in which the individual contact 11 is elastically contacted and clamped, and the opposing elastic leg 12c is separated from the individual contact 10. From this state, the movable contact piece 12 pushed down by the projection 13b by pushing down the operating portion 13f of the lever 13 swings around the hole 12a, and the opposing elastic leg 12c elastically contacts and clamps the individual contact 10, Conversely, the opposing elastic legs 12d are separated from the individual contacts 11, and the state shown in FIG. 3 is obtained. When the pressing force of the operation unit 13f is removed in this state, the lever 13 returns to the state shown in FIG. 2 by the urging force of the tension coil spring 14, and a series of operations is completed.

In the above embodiment, the opposing elastic legs 12b of the movable contact piece 12 are formed by notching and bending both side surfaces in a substantially V shape.
As shown in the drawing, both ends may be bent upward.

According to the present invention, as is apparent from the above-described embodiment, the provision of the opposing elastic legs on the movable contact piece allows the common contact and the individual contact to be elastically contacted and clamped from both sides, thereby improving the contact reliability. An excellent contact mechanism can be provided, and the common contact and the movable contact piece can be easily combined by forming the opposing elastic legs for holding the common contact upward from the lower end of the substantially V-shaped side surface. be able to.

In addition, as described above, the construction of the contact portion is configured such that only the movable contact piece is inserted into the common contact, so that there is an effect that the number of steps can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment of the switch of the present invention, FIG. 2 and FIG. 3 are side sectional views of the same, and FIG. FIG. 6 is an exploded perspective view showing a switch according to a conventional embodiment, and FIGS. 7 and 8 are sectional views of the same. 8 Case, 9 Common contact, 9a Projection, 9b Terminal, 10 Individual contact, 11 Individual contact, 12 Movable piece, 12a Hole, 12b, 12c, 12d: opposing elastic legs, 13: lever, 14: tension coil spring.

Claims (3)

(57) [Claims] 1. A terminal group comprising a common contact having a projection at an upper end and a terminal at a lower end, and individual contacts arranged in a line on one or both sides thereof, and at least one set of the terminal group in parallel. And a pair of opposing elastic legs which have a substantially inverted V-shape and whose top hole is swingably supported by the upper end protrusion of the common contact, and which always elastically holds the common contact. A switch composed of a movable contact piece having opposing elastic legs that repeats an elastic contact / clamp state and a separated state of an individual contact, and an operating lever for swinging the movable contact piece. 2. The switch according to claim 1, wherein the opposing elastic legs of the movable contact piece that always holds the common contact are bent upward from the lower end of the substantially inverted V-shape. 3. The operating lever according to claim 1, wherein a biasing force is applied to the operating lever in a constant state so that the movable contact piece always elastically contacts and clamps the individual contact or is always separated. switch.