JPH1012093A - Rotary switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary switch which has improved durability and of which an arm part made of an elastic metal plate can be reliably set at a regular position. SOLUTION: This switch comprises a switch plate 30, an elastic press plate 50, and a rotation body 70: and in the plate 30, switch contact points 37, 39 are formed; the press plate 50 has a base part 51 and arm parts 53, 55 which are continuous formed from the base part 51, curved upward, and have pressing parts 59, 61 at the tip ends positioned above the switch contact points 37, 39; and the rotation body 70 has abutting parts 79, 81 which are formed in the lower face and to be brought into contact with the arm parts 53, 55 to push down the arm parts. Positioning members 83, 85 to press projected parts 63, 65 and to carry out positioning of the pressing parts 59, 61 at positions at a prescribed distance from the switch contact points 37, 39 are formed in the lower face of the rotation body 70. When the rotation body 70 is rotated, the arm parts 53, 55 slide on the positioning members 83, 85 and when the contacting parts 79, 81 are brought into contact with the arm parts 53, 55, the arm parts 53, 55 are pushed down and the pressing parts 59, 61 are brought into contact with the switch contact points 37, 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary switch for turning on and off a switch by rotating a rotary member such as a knob.

[0002]

2. Description of the Related Art Conventionally, in a rotary switch, a plurality of arm portions formed on a slider are respectively rotated by rotating a rotor on which a slider made of an elastic metal plate is fixed. Each of the switch pattern surfaces is brought into sliding contact with a plurality of switch patterns provided on the member, thereby turning on and off the switch, or conversely, by rotating a rotating body provided with the plurality of switch patterns, There has been a structure in which each switch is slidably contacted with each arm of a slider fixed to another member, thereby turning on and off the switch.

[0003]

However, the above-mentioned conventional rotary switch has the following problems. In any of the above rotary switches, since the arm of the slider slides on the switch pattern, the arm and the switch pattern are greatly worn, which hinders an improvement in durability.

Since the arm portion is always in elastic contact with the switch pattern forming surface, a so-called set is generated in the elastic contact force of the arm portion, and the elastic contact force becomes weaker with time. Was hindering improvement.

In order to solve the above-mentioned drawbacks, the present applicant has proposed a rotary switch having a structure shown in FIG. 8 in a patent application of Japanese Patent Application No. 7-224666. This rotary switch has switch contacts 137 on its surface.
A switch plate 130 provided with an elastic metal plate, and a base 151 attached to the land 135 and protruding from the base 151 and bent obliquely upward, and the tip thereof is separated from the switch contact 137 by a predetermined distance. Elastic plate 15 having an arm portion 153 positioned at
0, and a rotating body 170 rotatably disposed on the switch plate 130 and provided on its lower surface with a protruding abutting portion 179 which abuts against and pushes down the convex portion 155 of the arm portion 153. It is configured.

When the rotating body 170 is rotated, the contact portion 179 comes into contact with the convex portion 155 of the arm portion 153 and pushes it down, and the tip of the arm portion 153 is brought into contact with the switch contact 13.
7 to turn on between the switch contact 137 and the land 135.

If the rotary switch is configured as described above,
Since the end of the elastic pressing plate 150 and the switch contact 137 do not come into sliding contact with each other and are merely turned on and off by repeating elastic contact and separation, wear between them is small and durability is improved.

The arm portion 153 is not always pressed by the contact portion 179, so that the so-called set is small.

However, in this rotary switch, the spatial distance between the tip of the arm 153 and the switch contact 137 may not be properly set due to the variation in assembling various parts, and the output waveform may be varied accordingly. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to improve the durability, not only to reduce the elastic contact force of the elastic metal plate with time, but also to make the arm portion of the elastic metal plate regular. The present invention is to provide a rotary switch that can be set to a position and generates an accurate output waveform.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a switch plate provided with switch contacts, a base made of an elastic body and mounted on the switch plate, and curving upward from the base. An elastic pressing plate having a pressing portion provided at a predetermined position of the lever and an arm portion located on a switch contact of the switch plate; and an elastic pressing plate rotatably disposed on the switch plate and provided on a lower surface thereof. A rotating body provided with a contact portion that abuts on the arm portion and presses down the arm portion, and the rotating body is rotated so that the contact portion provided on the rotating body contacts the arm portion of the elastic pressing plate. A rotary switch in which a contact portion pushes down the arm portion, and a pressing portion of the arm portion presses a switch contact of the switch plate, wherein the arm portion is connected to a switch of the switch plate near the arm portion of the elastic pressing plate. contact It was the provision of the positioning member for positioning Luo predetermined distance position.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view showing a rotary switch (pulse switch) according to an embodiment of the present invention. As shown in FIG.
The switch plate 30 and the elastic pressing plate 50 are fixed on the mounting plate 10, a rotating body (knob) 70 is mounted thereon, and a cover 90 is further mounted thereon. Hereinafter, each component will be described.

The mounting plate 10 is a plate made of molded resin,
An inner projection 11 and an outer projection 13 are formed on the surface in a concentric circular arc shape, and a switch plate mounting surface 15 is formed between the inner projection 11 and the outer projection 13.

The switch plate mounting surface 15 has five small projections 21 projecting therefrom. The outer surface of the outer projection 13 has seven through holes 23 surrounding the outer projection 13.
Is provided.

Next, as the switch plate 30, a synthetic resin sheet (for example, a PET sheet) having a main body portion 31 formed in a substantially semicircular arc shape and a drawn-out portion 33 drawn in a belt shape from the outer periphery of the main body portion 31 is prepared. One land 35 and two switch contacts 37, 3 are provided at predetermined positions on the surface of the main body 31.
9 and the land 35 and the switch contact 3
7 and 39, respectively,
Both 43 and 45 are formed so as to be drawn out to the drawer 33.

Here, the main body 31 is formed in such a size that it can be stored in the board mounting surface 15 of the mounting plate 10.

The land 35 and the switch contacts 37, 3
Reference numeral 9 is formed by coating carbon on a silver paste, and the lead patterns 41, 43, and 45 are formed by printing an insulating coating on the silver paste.

Each of the small projections 2 of the switch plate 30
Holes 47 penetrating through each of the small projections 21 are provided at positions opposing each other. Note that three of the holes 47 are provided in the land portion 35.

Next, the elastic pressing plate 50 is made of an elastic metal plate, and has a flat base 51 and two arms 53 and 55 projecting from one end of the base 51.

The base 51 is provided with three holes 57 penetrating through the three small projections 21 provided on the mounting plate 10.

The arms 53 and 55 are bent obliquely upward from the base 51 and then obliquely downward, and provided with pressing portions 59 and 61 at their ends. Note that the portions that are convex upward in the center of the arm portions 53 and 55 are referred to as convex portions 63 and 65.

FIG. 2 is a view showing the rotating body 70. FIG. 2 (a) is a side sectional view (sectional view taken along line AA in FIG. 2 (b)), and FIG. 2 (b) is a rear view. is there. Also, FIG.
FIG. 7 is a perspective view of a main part showing a part of the back surface of a knob part 71 of a zero.

As shown in FIG. 1 to FIG.
Is constituted by a cylindrical knob 71 and a ring 73 provided on the outer periphery of the lower end of the knob 71 in a ring shape. A ring-shaped recess 77 is provided on the lower surface of the flange 73.

In the concave portion 77, positioning members 83 and 85 comprising two rows of ring-shaped projections are provided. On the positioning members 83 and 85, further 12 projection-shaped abutments are provided. The parts 79 and 81 are respectively protruded at equal intervals. Note that the contact portion 79 and the contact portion 81 are arranged so that their phases are slightly shifted.

Next, as shown in FIG. 1, the cover 90 is made of a molded resin plate, has a circular hole 91 in the center thereof, and has a lower surface at a position facing each through hole 23 of the mounting plate 10. Each is provided with a small projection 93. The portion of the back surface of the cover 90 that accommodates the flange 73 of the rotating body 70 and the like is a concave portion 95.

To assemble the rotary switch, first, the switch plate 30 is attached to the board mounting surface 15 of the mounting plate 10.
Is mounted. At this time, each small projection 21 provided on the mounting plate 10 is inserted into each hole 47 provided in the main body 31.

Next, the base 51 of the elastic pressing plate 50 is placed on the land 35 of the switch plate 30. At this time, the base 51
The three small projections 21 penetrating the holes 47 of the switch plate 30 are inserted into the three holes 57.

When the tip of each small projection 21 is thermally caulked, the switch plate 30 and the elastic pressing plate 50 are integrally fixed on the mounting plate 10.

At this time, the two pressing portions 5 of the contact plate 50
The reference numerals 9 and 61 are located on the two switch contacts 37 and 39 of the switch plate 30 with a predetermined distance therebetween.

Next, the rotating body 70 is mounted on the switch plate 30. At this time, the flange 73 of the rotating body 70 is attached to the mounting plate 1.
The outer projection 13 is housed between the outer projection 13 and the inner projection 11.

Then, a cover 90 is put on the cover 90, the knob 71 of the rotating body 70 projects from the hole 91 of the cover 90, and the small projections 93 on the lower surface of the cover 90 are respectively inserted into the through holes 23 of the mounting plate 10. The rotary switch is completed by inserting and inserting the tip of each small projection 93 on the back side with heat.

FIG. 4 is a schematic sectional side view showing the rotary switch assembled in this manner. As shown in the figure, the main body 31 of the switch plate 30 is mounted on the switch plate mounting surface 15 of the mounting plate 10, and the elastic pressing plate 50 is fixed on the main body 31. The flange 73 of the rotating body 70 is arranged.

The two arms 5 of the elastic pressing plate 50
The reference numerals 3 and 55 are located at positions where the positioning members 83 and 85 of the rotating body 70 abut.

Although other functional parts are accommodated in the space A at the center of the rotary switch, the description is omitted because it is not the gist of the present invention.

FIG. 5 shows the arm 5 of the elastic pressing plate 50.
FIG. 6 is a schematic plan view showing the positional relationship between the contact portions 3 and 55 and the contact portions 79 and 81 of the rotating body 70. FIG.
It is a principal part schematic side sectional view which shows the positional relationship of the positioning members 83 and 85 and the contact parts 79 and 81 of the rotating body 70 with respect to 3,55.

As shown in FIG. 6, positioning members 83 and 85 are always in contact with the projections 63 and 65 of the arms 53 and 55, whereby the arms 53 and 55 are moved downward by a predetermined size. When pressed down, the pressing portions 59, 61 at the tips of the arms 53, 55 are always positioned at a position separated by a certain distance from the switch contacts 37, 39 of the switch plate 30.

When the rotating body 70 is rotated in the direction of the arrow as shown in FIG. 5, the projections 63 and 65 are brought into sliding contact with the rotating positioning members 83 and 85.

When the convex portion 63 of one arm portion 53 comes into contact with and passes through the contact portion 79, the arm portion 53
Is pressed further downward, and the pressing portion 59 elastically contacts the switch contact 37 of the switch plate 30, thereby turning on the circuit patterns 41 and 43 shown in FIG.

Further, the rotating body 70 is rotated in the direction of the arrow shown in FIG.
5, the arm portion 55 is pushed down, the pressing portion 61 elastically contacts the switch contact 39, and the circuit patterns 41 and 45 shown in FIG. 1 are turned on.

The positions of the two contact portions 79 and 81 are as follows.
As described above, the circuit patterns 41, 43
The ON / OFF timing between them and the ON / OFF timing between the circuit patterns 41 and 45 are out of phase. That is, it is possible to detect whether the rotating body 70 has been rotated clockwise or counterclockwise by the change in the switch pattern output caused by the phase difference.

As is apparent from the above embodiment, even when the elastic pressing plate 50 is in a component state, the arm portions 53 and 55 are deformed so as to be inclined upward from the base 51 more than a regular size. Therefore, even if this elastic pressing plate 50 is incorporated in the rotary switch without noticing the fact, the positioning members 83 and 85 of the rotating body 70 always press the convex portions 63 and 65 of the arm portions 53 and 55. The pressing portions 59, 61 of the arm portions 53, 55 are always accurately positioned at a position separated from the switch contacts 37, 39 by a certain distance.

FIG. 7 is a schematic view showing the positional relationship between the positioning members 83-2 and 85-2, the arms 53 and 55 of the elastic pressing plate 50, and the contact portions 79 and 81 according to another embodiment of the present invention. It is a side sectional view.

The positioning member 83 used in this embodiment
2, 85-2, the switch plate 30 from the upper surface of the mounting plate 10.
It is configured with a locking claw that penetrates the hole 100 provided in the
The distal ends of the arms 53 and 55 are locked to the lower surfaces of the distal ends of the positioning members 83-2 and 85-2, thereby restricting the arms 53 and 55 from moving upward from the locked position. ing. Even with such a configuration, the same effect as in the above-described embodiment can be obtained.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to these, and for example, the following modifications are possible. In the embodiment shown in FIGS.
Although the projections 3 and 85 are formed as protrusions projecting in a ring shape from the lower surface of the rotating body 70, the present invention is not necessarily required to be configured with the projections, and may be configured so that the arm portion directly contacts the lower surface of the rotating body. The lower surface itself may be configured as a positioning member.

In the embodiment shown in FIG. 7, the positioning members 83-2 and 85-2 made of locking claws are projected from the mounting plate 10, but the positioning members 83-2 and 85-2 are not necessarily attached to the mounting plate 10. No need to provide. In short, what is necessary is just to attach to a stationary member other than the rotating body 70.

By changing the structure of the contact portions 79 and 81, various ON / OFF switch waveforms can be obtained.

The number of the arm portions 53 and 55 is one or three.
More than books may be used.

In the above-described embodiment, a substrate in which switch contacts and the like are formed on the surface of a synthetic resin sheet is shown as a switch plate. However, the present invention is not limited to this, and a switch substrate and the like on a hard substrate may be provided.

Further, as shown in FIG.
1 and 203 are opposed to each other with a spacer 205 interposed therebetween.
Switch patterns 20 facing 01 and 203 respectively
It is also possible to use a so-called membrane-type switch plate provided with the switch contacts 9 and 211. The land patterns 213 and 215 are connected via holes 217 when a base of an elastic pressing plate (not shown) is mounted thereon.

It is to be noted that the switch plate may be constituted by only a plurality of metal plates without using a substrate as the switch plate, and the plurality of metal plates may be fixed to the mounting plate.

[0051]

As described in detail above, the present invention has the following excellent effects. Since the contact between the elastic pressing plate and the switch contact of the switch plate does not come into sliding contact with each other, the contact and the separation are simply repeated between on and off, the abrasion between both is small, and the durability is improved.

The arm portion of the elastic pressing plate is not always pressed against the abutting portion of the rotating body, so that the arm portion does not set and its durability is improved.

Since the arm portion of the elastic pressing plate is positioned by the positioning member, the arm portion can always be surely set at the correct position.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a rotary switch according to an embodiment of the present invention.

FIGS. 2A and 2B are views showing a rotating body 70, FIG. 2A is a side sectional view, and FIG. 2B is a rear view.

FIG. 3 is an essential part perspective view showing a part of the back surface of a knob 71 of the rotating body 70;

FIG. 4 is a schematic side sectional view showing a rotary switch.

FIG. 5 is a schematic plan view showing a positional relationship between arm portions 53 and 55 and contact portions 79 and 81.

FIG. 6 shows arm portions 53 and 55 and positioning members 83 and 85.
It is a principal part schematic sectional side view which shows the positional relationship of the contact part 79,81.

FIG. 7 shows a positioning member 8 according to another embodiment of the present invention.
3-2, 85-2, arm portions 53, 55 and contact portion 79,
It is principal part schematic side sectional drawing which shows the positional relationship of 81.

FIG. 8 is a schematic side sectional view of a main part of a rotary switch proposed by the present applicant.

FIG. 9 is an exploded perspective view showing another switch board used in the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 30 switch plate 37, 39 switch contact 50 elastic pressing plate 51 base 53, 55 arm 59, 61 pressing part 70 rotating body 79, 81 contact part 83, 85 positioning member

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[Procedure amendment]

[Submission date] July 29, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a switch plate provided with switch contacts, a base made of an elastic material, and a curved upper portion provided at a predetermined position from the base. An elastic pressing plate having a pressing portion having an arm portion located on a switch contact of the switch plate; and an elastic pressing plate rotatably disposed on the switch plate and abutting against the arm portion of the elastic pressing plate on the lower surface thereof. A rotating body provided with a contact portion for pushing down an arm portion, wherein the rotating body is rotated so that the contact portion provided on the rotating body pushes down the arm portion of the elastic pressing plate, and the pressing portion of the arm portion there a rotary switch to press the switch contact of the switch plate, the elastic
The arm of the pressing plate is separated from the switch plate by a predetermined distance.
A positioning member for positioning at an inclined position is provided.

Claims (2)

[Claims] A switch plate provided with a switch contact; a base made of an elastic body and mounted on the switch plate; and a pressing portion bent upward from the base and provided at a predetermined position, the switch of the switch plate. An elastic pressing plate having an arm portion located on a contact; and a contact portion rotatably disposed on the switch plate and having a lower surface thereof in contact with an arm portion of the elastic pressing plate to press down the arm portion. The rotating body is provided, and by rotating the rotating body, the contact portion provided on the rotating body comes into contact with the arm portion of the elastic pressing plate and pushes down the arm portion, and the pressing portion of the arm portion is A rotary switch for pressing a switch contact of the switch plate, wherein the positioning is such that the arm is positioned at a predetermined distance from the switch contact of the switch plate near an arm of the elastic pressing plate. Rotary switch, characterized in that a wood. 2. The positioning member is provided at a height at which an arm portion of the elastic pressing plate abuts on a lower surface of the rotating body and pushes down the arm portion to a position separated by a predetermined distance from a switch contact of the switch plate. The rotary switch according to claim 1, wherein