JPS6041622Y2 - rotary switch - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the improvement of rotary switches.

As is well known, various rotary switches have been developed.

Figure 1 shows an example of a conventional rotary switch, with 10
1 is a board, 11 is a rotor, 12 is an operator provided on the case, 13 is a common terminal provided in the center of the board 10, 1
4.15 is a fixed terminal; 16.17 is an insulating protrusion; 19 is a movable contact whose center portion is inserted through the common terminal 13 so that it can come in contact with the common terminal 13; and 20 is an actuator inserted into one peripheral edge of the rotor 11. The element 21 is a coil spring that biases the actuator.

In such a configuration, by rotating the operator 12, the operator 20 provided on the rotor 11 moves into the movable contact piece 19.
The movable contact piece 19 is tilted to change and set the switch state.

Incidentally, the rotor 11 and the substrate 10 are actually housed in a case (not shown).

The rotary switch with the above structure has a movable contact piece 19 that tilts to change the switch state, so the contact is reliable and has a long life.In addition, there is no need to provide a separate moderation mechanism, and the voltage and current capacity can be relatively large. It has the following advantages.

However, in recent years, there has been a strong demand for miniaturization of electronic components, and in the above configuration, the actuator 20, the coil spring 21
The thickness of the rotor 11 is required to house the rotor 11, and it has been difficult to downsize the rotor 11.

It is also possible to use a leaf spring instead of the coil spring 21, but when a leaf spring is downsized, it becomes close to a rigid body, and there is a limit to how thin the board can be. It was difficult to downsize the device.

This idea was made based on the above circumstances, and its purpose is to make it possible to reduce the thickness of the switch itself without reducing the size of the parts so much that it impairs assembly workability, and to reduce the contact life. The present invention provides a rotary switch that does not have any influence on contact conditions.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 2 and 3, 30 is a disk-shaped board, and a case 31 is attached to this board 30. As shown in FIG.

A retaining portion 32 is provided on the inner peripheral surface of one end of the case 31, and an operator 33 is provided at the center of the surface.

The engaging portion 32 is engaged with the peripheral edge of the back surface of the substrate 30, and the case 31 is prevented from being removed from the substrate 30 and is rotatably held.

Further, a common contact piece 34 is provided on the surface of the substrate 30 along the diameter direction.

Protrusions 341 and 3 are provided at both ends of the common contact piece 34 in the longitudinal direction.
4°, and one end protrudes from the substrate 30 to serve as a common terminal 343.

Further, the common contact piece 34 is sandwiched between the fixed contact pieces 35 and 3 at a predetermined distance in the diametrical direction of the board 30 on the surface of the board 30.
6 are provided, and the fixed contact pieces 35, 36 have their tips lower than the common contact pieces 34.

Further, one end portions of the fixed contact pieces 35, 36 are projected to the back side of the board 30, and the fixed terminals 35, . 36. It is said that

Furthermore, a substantially arc-shaped protrusion 37 is provided on the surface of the substrate 30.

The tip of this protrusion 37 is higher than the common contact piece 34, both ends are located near the fixed contact pieces 35, 36, and locking parts 371.37° are provided on the surface of both ends. It is being

On the other hand, the protrusion 34 of the common contact piece 34. ．． A movable contact piece 38 is placed at 34°.

This movable contact piece 38 is provided with a locking portion 3B, 38°, and this locking portion 38. ．． Movable contact piece 3 by 38□
8 has a smaller diameter than the other end, and this one end is located within the arcuate protrusion 37.

In this state, the movable contact piece 38 is attached to the locking portion 38. ．． 38□
can come into contact with both ends of the protrusion 37, and rotation of the movable contact piece 38 is suppressed.

Further, 39 is an actuator.

One end of this actuator 39 is located on the surface of the protrusion 37, and a pusher 40 is provided at the other end.
is in contact with the surface portion of the movable contact piece 38.

Furthermore, this actuator 39 is held by holding members 41 and 42 provided inside the case 31, and
It is said that it can rotate together with 1.

The operator 33 also has a recess 33 . is provided.

One end of an extension coil spring 43 is fitted into the recess 33 and held therein, and the other end is brought into contact with a recess 391 provided in the center of the actuator 39 to press the actuator 39. ing.

In the state shown in FIG. 2, when the operator 33 is rotated, for example, in the direction of arrow A in the figure, the case 31 rotates around the base plate 30 together with the operator 33, and the operator 39 moves over the movable contact piece 38. Moving.

Then, when the presser 40 passes over the common contact piece 34, the movable contact piece 38 tilts around the common contact piece 34, and the fixed contact piece 36 and the common contact piece 34 are in a connected state as shown in FIG. .

Furthermore, when the operator 33 is rotated in the direction of arrow B in the figure from this state, the movable contact piece 38 is rotated counterclockwise in FIG. 34 and the fixed contact piece 35 are switched to a connected state.

In addition, one end of the actuator 39 is adapted to come into contact with the locking portions 37□, 37° of the arcuate protrusion 37 in the rotating state, thereby defining the rotation range of the operator 33. ing.

According to the above configuration, the case 33 is rotatably attached to the board 30, and the coil spring 43 presses the actuator 39.
is housed in a recess 33□ provided in the operator 33.

Therefore, since the conventional rotor is not required and the coil spring 43 is housed within the operator 33, the thickness of the switch can be made thinner than the conventional one.

Furthermore, since there is no need to reduce the size of individual parts, there is an advantage that assembly workability is not impaired.

Furthermore, since one end of the actuator 39 is located on the surface of the protrusion 37 and the central portion is pressed by the coil spring 43, the presser 40 is always pressed with a predetermined force and the movable contact piece 3
This has the advantage that the contact between the common contact piece 34 and the fixed contact pieces 35 and 36 is maintained stably.

It goes without saying that this invention is not limited to the above-mentioned embodiments, and can be modified in various ways without changing the gist.

As detailed above, this invention makes it possible to reduce the thickness of the switch itself without reducing the size of the parts so much that it impairs assembly workability, and without affecting the contact life or contact condition in any way. We can provide a rotary switch that does not give any damage.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an example of a conventional rotary switch, Fig. 2 is a partially cutaway perspective view showing an embodiment of the rotary switch according to this invention, and Fig. 3 is an exploded perspective view of Fig. 2. , FIG. 4 is a side sectional view showing the switching state of FIG. 2. 30... Board, 31... Case, 34
...Common contact piece, 35.36...Fixed contact piece, 37...Protrusion, 38...Movable contact piece, 39... - Actuator, 43... Coil spring.

Claims (1)

[Scope of utility model registration request] a substrate with a circular surface; a case rotatably attached to the substrate and provided with an operator at the center of rotation;
a common contact piece provided along the diameter direction of the substrate; a fixed contact piece provided diametrically apart from the common contact piece and having a tip end lower than the common contact piece; and a surface portion of the substrate. a movable contact piece that is tiltable about the common contact piece and that is capable of contacting the fixed contact piece and the common contact piece in this tilted state; is located on the surface of the protrusion and whose other end abuts the surface of the movable contact piece and rotates together with the case; one end is held within the operator of the case and the other end 1. A rotary switch comprising: an elastic member whose portion is in contact with the actuator.