JPH0950732A - Rotary switch - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To reduce wear of a contact plate and a pattern provided on a switch board, so that an elastic contact force of the contact plate does not become weak with time.
To provide a rotary switch that can be downsized. A switch substrate (30) having contact patterns (37, 39) and a land pattern (35) on its surface, and a base (5) made of an elastic metal plate and attached to the land pattern (35).
1 and a contact plate 50 that protrudes from the base 51 and is bent obliquely upward, and the ends thereof are located on the contact patterns 37 and 39 with a predetermined distance therebetween, and a contact plate 50 that rotates on the switch substrate 30. A protrusion 7 which is freely arranged and abuts on the lower surface of the arm portion 53, 55 to push it down.
And a rotating body 70 provided with 9, 81. Rotating body 70
By rotating the protrusions 79, 81
To contact with the contact patterns 37 and 39 to turn on the contact patterns 37 and 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 a switch on and off by rotating a rotary body such as a knob.

[0002]

2. Description of the Related Art Conventionally, in a rotary switch, a desired switch pattern is provided on a substrate, a contact plate for sliding contact is attached to a knob arranged on the substrate, and the knob is rotated. The contact plate is slidably contacted with the above switch pattern to turn the switch on and off, or conversely, the rotating knob is provided with the desired switch pattern, and the contact plate is fixed to another member for mounting. In addition, there is a structure in which a contact plate is brought into sliding contact with a switch pattern by rotating a knob, thereby turning the switch on and off.

FIG. 7 is a schematic plan view showing an example (pulse switch) of a conventional rotary switch of this type. In the figure, reference numeral 100 is a switch substrate in which a ring-shaped common switch pattern 101 is provided on a circular substrate 102 made of an insulating plate, and radial switch patterns 103 are provided on the outer side of the ring-shaped common switch pattern 101 at substantially equal intervals. The radial switch pattern 103 is bent in a substantially staircase shape at its central portion.

A common contact plate 105 is in sliding contact with the common switch pattern 101, and switching contact plates 107 and 109 are connected to the radial switch pattern 103.
Are in sliding contact with each other.

When the switch board 100 is rotated,
The switching contact plates 107 and 109 are repeatedly turned on and off with the radial switch pattern 103 to count the number of generated pulses and simultaneously detect the rotation direction. That is, when the rotating substrate 100 rotates clockwise, the contact plate 10
7 leads the contact plate 109 by a minute angle, and retards when counterclockwise. That is, if this rotary switch is used, not only the amount of rotation but also the rotation direction of the rotating substrate 105 can be detected by the phase difference.

[0006]

However, in the conventional rotary switch described above, the contact plates 105, 107 and 109 are structured to slide on the switch patterns 101 and 103, so that the contact plates 105, 107 and 109 and The wear of the switch patterns 101 and 103 was large, which hindered improvement in durability.

Further, since the contact plates 105, 107, 109 are always in elastic contact with the switch substrate 100 on which the switch patterns 101, 103 are formed, the contact plates 10
The elastic contact force of 5,107,109 has a so-called fatigue,
There was a fear that the elastic contact force would weaken over time.

In the case of the rotary switch shown in FIG. 7, the common switch pattern 101 must be provided in addition to the radial switch pattern 103, and the size of the rotary switch is correspondingly increased, which cannot be downsized. There were also problems.

The present invention has been made in view of the above points, and it is an object of the present invention to reduce the abrasion between the contact plate and the pattern provided on the switch substrate, and to reduce the elastic contact force of the contact plate with time. Another object is to provide a rotary switch that can be further downsized.

[0010]

In order to solve the above problems, the present invention provides a switch substrate having a contact pattern and a land pattern at predetermined positions on the surface, and a land pattern of the switch substrate made of an elastic metal plate. A contact plate having a base part to be attached and an arm part projecting from the base part, bent obliquely upward and having its tip spaced apart from the contact pattern of the switch board by a predetermined distance, and rotatable on the switch board. And a protrusion provided on the lower surface thereof at a predetermined position to abut on the arm portion of the contact plate to push it down, and by rotating the rotor, the protrusion provided on the rotor is a contact point. It is configured such that it abuts against the arm portion of the plate and pushes it down, and the tip of the arm portion comes into contact with the contact pattern of the switch substrate to turn it on.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION 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 substrate 30 and the contact plate 50 are fixed on the mounting plate 10, a knob (rotating body) 70 is placed on the switch substrate 30, and a cover 90 is mounted on the knob. Hereinafter, each component will be described.

The mounting plate 10 is a plate made of synthetic resin and has concentric circular arc-shaped inner projections 11 and outer projections 13 on its surface.
And a substrate mounting surface 15 is formed in a portion between the inner protrusion 11 and the outer protrusion 13.

Further, the inner protrusion 11 and the outer protrusion 13 are provided with notches 17 and 19 for leading out the lead-out portion 33 of the switch substrate 30 described below, respectively. Further, five small projections 21 are provided at predetermined positions on the board mounting surface 15.

Further, a large number of through holes 23 are provided at predetermined positions on the outer surface of the outer protrusion 13 so as to surround the outer protrusion 13.

Next, the switch substrate 30 is prepared by preparing a synthetic resin sheet (for example, a PET sheet) having a ring-shaped ring portion 31 and a strip-shaped lead-out portion 33 drawn out from one end of the ring portion 31. One land pattern 35 and two contact patterns 37, 39 are formed at predetermined positions on the surface of the ring portion 31, and each pattern 35, 37,
Drawing patterns 41 and 4 drawn from 39, respectively
All of the parts 3 and 45 are formed so as to be drawn out to the drawer part 33.

Here, the ring portion 31 is formed in such a size that it can be housed in the board mounting surface 15 of the mounting plate 10.

The land pattern 35 and the contact pattern 3
7 and 39 are formed by coating a silver paste with carbon, and the extraction patterns 41, 43 and 45 are formed by printing an insulating coating on the silver paste.

Further, the small protrusions 2 of the switch substrate 30.
Holes 47 penetrating the small protrusions 21 are provided at positions facing 1 respectively. The land pattern 35 has three holes 47 among the holes 47.

Next, the contact plate 50 is composed of an elastic metal plate, and is composed of a flat plate-shaped base portion 51 and two arm portions 53 and 55 protruding from one end of the base portion 51.

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

The arm portions 53 and 55 are bent obliquely upward from the base portion 51 and then obliquely downward, and contact points 59 and 61 are provided at their tips. The upwardly convex portions of the arms 53 and 55 are referred to as pressing portions 63 and 65.

Next, FIG. 2 is a view showing the knob 70. FIG. 2 (a) is a sectional view taken along the line A--A of FIG. 1, and FIG.

As shown in FIGS. 1 and 2, this knob 70
Is composed of a circular knob portion 71 and a ring-shaped flange portion 73 provided on the outer periphery of the knob portion 71.
A circular recess 75 is provided on the lower surface of the knob portion 71, and a ring-shaped recess 77 is provided on the lower surface of the collar portion 73.

Further, in the recess 77, as shown in FIG. 2B, twelve pairs of two projections 79 and 81 are provided at a position at an equal rotation angle (θ = 30 °) from the center of rotation. It is provided. However, the protrusions 79 and 81 of each set are arranged so that their phases are slightly shifted.

Next, as shown in FIG. 1, the cover 90 is composed of a substantially circular synthetic resin plate, and a circular hole 91 is formed in the center thereof.
And small projections 93 are provided on the lower surface of the mounting plate 10 so as to face the through holes 23 of the mounting plate 10. In addition, the collar portion 73 of the knob 70 on the back surface of the cover 90
A portion for accommodating the like is a recess 95.

To assemble this rotary switch, first, the ring portion 31 of the switch substrate 30 is placed on the substrate mounting surface 15 of the mounting plate 10. At this time, the mounting plate 10
The small protrusions 21 provided in the ring are inserted into the holes 47 provided in the ring portion 31.

Next, the base 51 of the contact plate 50 is placed on the land pattern 35 of the switch substrate 30. At this time, the three small protrusions 21 penetrating the holes 47 of the switch substrate 30 are inserted into the three holes 57 of the base 51.

Then, in this state, each small projection 2 of the mounting plate 10
Heat crimp the tip of 1. This allows the switch board 3
0 and the contact plate 50 are integrally fixed to the mounting plate 10.

At this time, the two contact portions 59 and 61 of the contact plate 50 are located on the two contact patterns 37 and 39 of the switch substrate 30 with a predetermined distance therebetween.

Next, the knob 70 is placed on the switch substrate 30. At this time, the outer periphery of the flange portion 73 of the knob 70 is housed inside the outer protrusion 13 of the mounting plate 10.

Then, the cover 90 is put on the cover 90, the knob portion 71 of the knob 70 is projected 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 small projections 93 are inserted, and the tips of the small projections 93 are thermally caulked on the back surface side.

FIG. 3 is a schematic side sectional view showing the rotary switch thus assembled. As shown in the figure, the switch board 30 is provided on the board mounting surface 15 of the mounting plate 10.
The ring portion 31 is mounted, the contact plate 50 is fixed on the ring portion 31, and the collar portion 73 of the knob 70 is disposed on the contact plate 50. A cover 90 is covered on the brim 73.

The two arm portions 53 of the contact plate 50,
55 is located at a position where the projections 79 and 81 of the knob 70 come into contact with each other.

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.

When the knob 70 is rotated, the knob 7
The protrusions 79 and 81 of 0 come into contact with the arm portion 53 and the arm portion 55 of the contact plate 50 with a slight phase difference.

FIG. 4 shows the arm portion 53 of the contact plate 50,
It is a schematic plan view which shows the positional relationship of 55 and the protrusions 79 and 81 of the knob 70. Further, FIG. 5 shows the arm portion 5 of the contact plate 50.
3 is an enlarged schematic side sectional view of essential parts showing the positional relationship between projections 79, 81 of knobs 3, 55 and knob 70. FIG.

As shown in FIG. 4, when the knob 70 is rotated clockwise (in the direction of the arrow), the projections 79 and 81 provided on the lower surface of the knob 70 also rotate clockwise, and the arms of the contact plate 50 are respectively rotated. It passes over the parts 53 and 55.

When the protrusion 79 passes over the arm portion 53, the tip of the protrusion 79 abuts against the pressing portion 63 of the arm portion 53 and pushes it down, whereby the contact portion at the tip of the arm portion 53. 59 (see FIG. 5) is the switch substrate 3
The contact pattern 37 of 0 is elastically contacted, so that the space between the drawing pattern 41 and the drawing pattern 43 shown in FIG. 1 is turned on.

Similarly, when the other projection 81 passes over the arm portion 55, the tip of the projection 81 abuts against the pressing portion 65 of the arm portion 55 and pushes it down, whereby the arm portion 55 is pushed down. 55 Contact point 61 at the tip (see FIG. 5)
Elastically contacts the contact pattern 39 of the switch substrate 30, whereby the lead-out pattern 41 and the lead-out pattern 4 shown in FIG.
5 turns on.

Since the two projections 79, 81 are slightly displaced in the circumferential direction of the knob 70 as described above, the projections 79, 81 are rotated when the knob 70 is rotated.
The position where 81 abuts the pressing portions 63 and 65 of the arm portions 53 and 55 is slightly displaced.

Specifically, when the knob 70 is rotated in the direction of the arrow shown in FIG. 4, a pair of protrusions 79, 8
The protrusion 81 of the armature 5 is arranged before the protrusion 79.
5, the contact portion 61 is turned on to the contact pattern 39 slightly before the contact portion 59. Then, when the knob 70 is further rotated and the projections 79 and 81 pass over the pressing portions 63 and 65 of the arm portions 53 and 55, the arm portion 55 first returns to the original position and the contact portion 61.
Is turned off, then the arm portion 53 returns to its original position and the contact portion 59 is turned off.

When the knob 70 is rotated in the opposite direction, the protrusion 79 comes into contact with the pressing portion 63 of the arm portion 53 before the protrusion 81, and therefore the contact portion 59 has the contact portion 6.
The contact pattern 37 is turned on slightly before 1. The timing of turning off the contact 59 is slightly earlier.

That is, it is possible to detect whether the knob 70 is rotated clockwise or counterclockwise by the change in the switch pattern output caused by the phase difference.

As is apparent from the above embodiment, in the present invention, the contact portions 59 and 61 of the contact plate 50 and the contact patterns 37 and 39 are not slidably contacted with each other, but elastic contact and separation are simply repeated between them. It just turns it on and off. Therefore, the contact portions 59, 61 of the contact plate 50 and the contact patterns 37, 3
The wear of No. 9 is small, and its durability is improved.

Further, the arm portions 53, 55 of the contact plate 50 are not always in contact with the projections 79, 81 of the knob 70, and thus are normally in an unloaded state, so that the arm portions 53, 55 of The durability is improved. In the case of the contact plates 105, 107, 109 of the conventional rotary switch as shown in FIG. 7, the contact plates are always in elastic contact with the switch substrate 100, and therefore their durability is lower than that of the present invention.

In the case of the present invention, since the switch board 30 and the contact plate 50 do not rotate, the ring portion 31 of the switch board 30 does not necessarily have to be formed in such a ring shape. Therefore, for example, as shown in FIG. 6A, by making the pull-out patterns 41, 43, and 45 the same in the pull-out direction, the area of the entire switch substrate 30 'can be reduced.

Further, in the case of the present invention, it is not necessary to provide the common switch pattern 101 and the contact plate 105 which are in sliding contact with the common switch pattern 101 as in the conventional example shown in FIG. Can be achieved.

In order to prevent the so-called settling of the arm portions 53, 55, for example, as shown in FIG. 6B, the arm portions 53 ', 55' of the contact plate 50 'may be made longer. good.

The contact plate 50 does not necessarily have to be installed along the direction of rotation of the knob 70 as in the above embodiment, and for example, as shown in FIG. 6 (b),
The contact plate 50 ″ may be installed in a direction different from the rotation direction of the knob 70.

In the above embodiment, the rotary switch according to the present invention is used as a pulse switch that produces an on / off pulse at a predetermined rotation interval when the knob is rotated, but the present invention is not limited to this. Needless to say, it can also be used as a rotary switch that produces other on-off waveforms by changing the shape of the protrusions.

In the above embodiment, the number of the arm portions 53 and 55 of the contact plate 50 is two, and the respective arm portions 5 are
There are two types of protrusions, the protrusion 79 and the protrusion 81, which come into contact with 3, 55. However, if necessary, the number of arm portions may be one or three or more, and the type of protrusion may be changed accordingly. Needless to say.

In the above embodiment, the knob 70 is provided with the projection 7.
Although 9, 81 are provided, in the present invention, a protrusion may be provided on the rotating body other than the knob.

In the above embodiment, the switch substrate made of a flexible sheet is used as the switch substrate, but the present invention is not limited to this, and a switch substrate made of a hard plate may be used.

[0054]

As described in detail above, the rotary switch according to the present invention has the following excellent effects. Do not make sliding contact between the contact pattern of the contact plate and the switch board,
Since it simply turns on and off by repeating elastic contact and separation,
Both wear between them is small, and their durability is improved.

Since the arm portion of the contact plate is not always in contact with the protrusion of the rotating body and is normally in a no-load state, the durability of the arm portion of the contact plate is improved.

The switch substrate can be miniaturized.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a knob 70, and FIG.
Is a cross-sectional view taken along the line A-A of FIG.

FIG. 3 is a schematic side sectional view showing an assembled rotary switch.

FIG. 4 is an arm portion 53, 55 of the contact plate 50 and a knob 70.
It is a schematic plan view which shows the positional relationship of the protrusions 79 and 81 of FIG.

FIG. 5 is an arm portion 53, 55 of the contact plate 50 and a knob 70.
FIG. 9 is an enlarged schematic side sectional view of an essential part showing the positional relationship between the protrusions 79 and 81.

6A and 6B are views showing another embodiment of the present invention.

FIG. 7 is a schematic plan view showing an example of a conventional rotary switch.

[Explanation of symbols]

 10 Mounting Plate 30 Switch Board 35 Land Pattern 37,39 Contact Pattern 41,43,45 Drawing Pattern 50 Contact Plate 51 Base 53,55 Arm 70 Knob (Rotator) 79,81 Protrusion 90 Cover

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 8, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

In order to solve the above problems, the present invention provides a switch substrate having a contact pattern and a land pattern at predetermined positions on the surface, and a land pattern of the switch substrate made of an elastic metal plate. A contact plate having a base part to be attached and an arm part projecting from the base part and bent upward to be spaced apart by a predetermined distance on the contact pattern of the switch board, and rotatably on the switch board. A rotating body provided at a predetermined position on the lower surface thereof with which the arm portion of the contact plate is abutted to push down the arm portion, and the protrusion provided on the rotating body is provided by rotating the rotating body. Push down the arm portion in contact with the arm portion of the contact plate, to constitute a tip of the arm portion so as to contact the contact pattern of the switch substrate. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 1, 1996

[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] 0010

[Correction method] Change

[Correction contents]

[0010]

[Means for Solving the Problems ] To solve the above problems
Therefore, the present invention is a contact provided with a switch contact and a land contact.
A forming member and a base attached to the land contact,
A bullet having an abutting portion located above the switch contact
And a flexible plate, which is rotatably disposed above the elastic plate and below the elastic plate.
Rotating body provided with a push-down portion for pushing down the elastic plate on its surface
And is installed on the rotating body by rotating the rotating body.
The push-down part pushes down the elastic plate
The contact part is configured so as to contact the switch contact.
Was.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION 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.
A switch substrate (contact forming member) 30 and a contact plate (elastic plate) 50 are fixed on a mounting plate 10, a knob (rotating body) 70 is placed on the switch substrate, and a cover 90 is mounted on the knob. Has been done. Hereinafter, each component will be described.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

Next , a switch substrate 30 which becomes a contact forming member.
Is a ring-shaped ring portion 31 and the ring portion 31.
A circuit board made of a synthetic resin sheet (for example, a PET sheet) having a strip-shaped lead-out portion 33 drawn out from one end of the ring portion 31 is prepared, and one land is provided at a predetermined position on the surface of the ring portion 31 .
The land pattern 35 of the contact and the two switch contacts
The contact patterns 37, 39 are formed, and the extraction patterns 41, 43, 45 that are respectively extracted from the patterns 35, 37, 39 are formed so as to be extracted to the extraction portion 33.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction contents]

[0019] Then the contact plate 50 made of an elastic plate is made of an elastic metal plate, a flat plate-shaped base portion 51 is constituted by two arms 53 and 55 projecting from one end of the base portion 51 .

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

The arm portions 53 and 55 are bent obliquely upward from the base portion 51 and then obliquely downward, and abutting portions 59 and 61 are provided at their tips. The upwardly convex portions of the arms 53 and 55 are referred to as pressing portions 63 and 65.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

Next, FIG. 2 is a view showing a knob 70 which serves as a rotating body . FIG. 2 (a) is a sectional view taken along the line AA of FIG. 1 and FIG.

[Procedure amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction contents]

Further, as shown in FIG. 2 (b), twelve pairs of protrusions 79 and 81, which serve as a pair of push-down portions , are provided in the concave portion 77 at positions at an equal rotation angle from the rotation center point (θ = Thirty
)). However, the protrusions 79 and 81 of each set are arranged so that their phases are slightly shifted.

[Procedure amendment 9]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction contents]

At this time, the two contact portions 59, 61 of the contact plate 50 are located on the two contact patterns 37, 39 of the switch substrate 30 with a predetermined distance therebetween.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

When the projection 79 passes over the arm portion 53, the tip of the projection 79 abuts against the pressing portion 63 of the arm portion 53 and pushes it down, whereby the tip of the arm portion 53 abuts. The portion 59 (see FIG. 5) is the switch substrate 3
The contact pattern 37 of 0 is elastically contacted, so that the space between the drawing pattern 41 and the drawing pattern 43 shown in FIG. 1 is turned on.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction contents]

Similarly, when the other projection 81 passes over the arm portion 55, the tip of the projection 81 abuts against the pressing portion 65 of the arm portion 55 and pushes it down, whereby the arm portion 55 is pushed down. 55 abutting portion 61 at the tip (see FIG. 5)
Elastically contacts the contact pattern 39 of the switch substrate 30, whereby the lead-out pattern 41 and the lead-out pattern 4 shown in FIG.
5 turns on.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

Specifically, when the knob 70 is rotated in the direction of the arrow shown in FIG. 4, a pair of protrusions 79, 8
The protrusion 81 of the armature 5 is arranged before the protrusion 79.
5 in contact with the pressing portion 65, and thus towards the abutment portion 61 abuts
The contact pattern 39 is turned on slightly before the portion 59. When the knob 70 is further rotated and the projections 79 and 81 pass over the pressing portions 63 and 65 of the arm portions 53 and 55, the arm portion 55 first returns to the original position and the contact portion 61.
Turns off, and then the arm 53 returns to its original position and abuts.
The part 59 is turned off.

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction contents]

When the knob 70 is rotated in the opposite direction, the protrusion 79 comes into contact with the pressing portion 63 of the arm portion 53 before the protrusion 81, and therefore the abutting portion 59 comes into contact with the abutting portion 6.
The contact pattern 37 is turned on slightly before 1. The timing of turning off the contact portion 59 is slightly earlier.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction contents]

As is clear from the above embodiment, in the present invention, the contact portions 59 and 61 of the contact plate 50 and the contact patterns 37 and 39 do not slide, but only elastic contact and separation are repeated between them. Just turn it on and off. Therefore, the contact portions 59, 61 of the contact plate 50 and the contact patterns 37, 3
The wear of No. 9 is small, and its durability is improved.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0054

[Correction method] Change

[Correction contents]

[0054]

As described in detail above, the rotary switch according to the present invention has the following excellent effects. Elastic plate (contact plate) and contact forming member (switch substrate)
During switch contact (contact pattern) is not sliding because they merely turned on and off repeatedly separated from the elastic contact, any wear between them is small, the durability is improved.

[Procedure Amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction contents]

The elastic plate (contact plate) is a push-down portion of the rotating body.
It is always (projection) does not abut, usually because in a state of no load, the durability of the elastic plate is improved.

Claims (1)

[Claims] 1. A switch board having a contact pattern and a land pattern at predetermined positions on the surface, a base made of an elastic metal plate and attached to the land pattern of the switch board, and a base protruding from the base and bent obliquely upward. A contact plate having an arm portion whose tip is located on the contact pattern of the switch substrate with a predetermined distance therebetween, and an arm of the contact plate rotatably arranged on the switch substrate and at a predetermined position on the lower surface thereof. A rotating body provided with a protrusion that abuts against the portion and pushes down the rotating body, and by rotating the rotating body, the protrusion provided on the rotating body abuts against the arm portion of the contact plate and pushes down the arm. A rotary switch, characterized in that the tip of the part is brought into contact with the contact pattern of the switch substrate to turn on the contact pattern.