JP2000353452A - Switch mechanism and on/off-turning elastic body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability, make on/off-timing to be rarely drifted, miniaturize a switch mechanism and make it thin. SOLUTION: This switch mechanism is provided with a contact point forming member 10 having a switch contact point 11, an elastic body (on/off-turning elastic body) 20 having a moving contact point 21 abutting on the switch contact point 11, and a moving body 30 having through sections 31. The moving body 30 is arranged between the contact point forming member 10 and the elastic body 20, the moving body 30 is moved relatively to the elastic body 20, and the moving contact point 21 of the elastic body 20 is inserted into or removed from a through section 31 of the moving body 30 to turn the moving contact point 21 and the switch contact point 11 on or off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch mechanism and an on / off elastic body.

[0002]

2. Description of the Related Art Conventionally, rotary switches and slide switches have a structure in which a slider made of a metal plate is brought into sliding contact with a switch pattern provided on a substrate, thereby turning the switch on and off.

However, since the above-mentioned switch structure has a structure in which the slider slides on the switch pattern, the two parts are greatly worn and hindered from improving the durability.

To solve this problem, for example, as shown in FIG.
5, a base 151 and a base 15 made of an elastic metal plate and attached to the land 135.
1, an arm 153 having a movable contact 154 at the tip protruding therefrom and located at a predetermined distance above the switch contact 137.
And an elastic body 150 having a pressing portion 179 that is rotatably disposed on the elastic body 150 and presses down the arm portion 153 on the lower surface thereof. Pressing part 179 is arm part 15
3, a switch mechanism having a structure in which the movable contact 154 abuts on the switch contact 137 to turn on between the switch contact 137 and the land portion 135 by pushing the movable contact 154 down.

However, in the case of this switch structure, the movable contact 154 must be set at a predetermined distance from the switch contact 137, and the rotary moving member 170
Therefore, there is a problem that the thickness cannot be reduced.

Further, since the movable contact 154 is formed by being bent in a rectangular shape or a substantially arc shape, which part of the bent part of the movable contact 154 comes into contact with the switch contact 137 is determined. And the on / off timing is slightly shifted. Also, a pressing portion 179 to the arm portion 153
The subtle deviation of the contact position also leads to the deviation of the on / off timing. These shifts become a problem particularly when the switch mechanism is downsized.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to improve the durability,
An object of the present invention is to provide a switch structure and an elastic body for on / off, in which the on / off timing is hard to be shifted and the size and thickness can be reduced.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a contact forming member provided with a switch contact, an elastic body provided with a movable contact that contacts the switch contact,
A moving body provided with a penetrating portion, the moving body is provided between the contact forming member and the elastic body, and the moving body is relatively moved with respect to the elastic body. The switch mechanism is configured by inserting and removing the movable contact into and from the through portion of the moving body to turn on and off the movable contact and the switch contact. Here, the moving body is preferably a flat insulating plate. The present invention is also an on-off elastic body provided with a movable contact that is turned on and off between the switch contact by coming into contact with and separating from the switch contact, wherein the movable contact has a conical shape toward the switch contact side. It was formed so as to protrude.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a basic structural diagram of the switch mechanism of the present invention. As shown in the figure, the switch mechanism is configured by disposing a moving body 30 between the contact forming member 10 and the elastic body 20.

Here, the contact forming member 10 is constituted by a conductive member (for example, a metal plate or the like). Elastic body 2
0 is also formed of an elastic conductive member (for example, an elastic metal plate or the like), a movable contact 21 is provided at one end thereof,
A surface portion of the contact forming member 10 facing the movable contact 21 is a switch contact 11.

On the other hand, the moving body 30 is formed of an insulating plate (for example, a synthetic resin film), and has a through portion 31 at a predetermined position.

The moving body 30 is installed between the contact forming member 10 and the elastic body 20.
Is configured to move relative to the contact forming member 10 and the elastic body 20 in the direction of arrow A. Elastic body 2
Numeral 0 denotes a position where the movable contact 21 resiliently contacts the switch contact 11 when there is no moving body 30.

In the switch mechanism configured as described above, the moving body 30 is moved in the direction of arrow A to move the moving body 30 between the switch contact 11 and the movable contact 21 as shown in FIG.
When the through portion 31 is located, the switch contact 11 and the movable contact 21 are in elastic contact with each other and are turned on. On the other hand, the moving body 30
Move and the movable contact 21 is moved to the moving body 30 as shown in FIG.
In this case, the state between the switch contact 11 and the movable contact 21 is turned off.

That is, according to the switch mechanism of the present invention, the movable contact 21 of the elastic body 20 is
By inserting and removing the movable contact 21 in and from the movable contact 1, the movable contact 21 and the switch contact 11 are turned on and off.

As described above, according to the present invention, the contact forming member 10 and the elastic body 20 disposed on the contact forming member 10 are provided.
And the moving body 30 sandwiched between them, the switch mechanism can be configured, so that the thickness of the switch mechanism can be reduced.

Further, since the movable contact 21 of the elastic body 20 does not slide on the contact forming member 10 but only slides on the movable body 30, the movable contact can be easily formed by using a smooth synthetic resin film or the like as the movable body. Wear can be prevented and durability is improved.

Here, the contact forming member 10 may be formed of a single metal plate, may be formed by applying (eg, plating) a conductive member on the surface of the insulating member, or may be formed on the insulating plate. Various modifications are possible, such as a configuration in which a desired pattern of switch contacts may be formed. Also its shape
The structure can also be variously modified. In short, any shape and structure may be used as long as a switch contact that is turned on by contacting a movable contact of an elastic body is provided.

Next, the elastic body 20 may be composed of one elastic metal plate, may be formed by applying (eg, plating) a conductive member on the surface of the elastic insulating plate, or may have its movable contact. 2
Various modifications are possible, for example, only one part may be made of a conductive member. Also, its shape and structure can be variously modified. In short, any shape and structure may be used as long as at least a portion of the movable contact that contacts the switch contact has conductivity.

FIGS. 3 and 4 are exploded perspective views showing an embodiment in which the switch mechanism according to the present invention is applied to a rotary pulse switch. FIG. 3 and FIG. 4 show one rotary pulse switch.

As shown in FIGS. 2 and 3, the rotary pulse switch includes a contact forming member 10 and a moving body 3 in a case 40.
0, two elastic bodies 20, 20 and a driving body 60 are housed, and a cover 80 is mounted on the case 40 via a click member 70. Hereinafter, each component will be described.

The case 40 is a substantially flat synthetic resin molded product, and has a side wall 41 provided on the outer periphery thereof, a circular shaft support hole 431 provided substantially in the center of the inner bottom surface, and a side wall 4.
A groove-shaped guide portion 43 into which a fixing portion 83 of the cover 80 described below is inserted is provided at each of two positions on both right and left outer sides of the device 1.
On one side of the side wall 41, three openings 45 are provided for projecting the terminals 17 of the contact forming member 10 and the terminals 29 of the elastic members 20 and 20 described below to the outside.
Locking portions 47 project from the upper surfaces of the left and right side walls 41. Further, a pair of concave engaging portions 49, 49 and an elastic body 2 described below are provided on the left and right sides on the near side of the inner bottom surface of the case 40.
A pair of protruding locking portions 51, 51 for fixing 0, 20 are provided.

Next, the contact forming member 10 is formed by providing a circular insertion hole 13 at the center of a substantially disk-shaped metal plate, pulling out the drawer 15 from the outer periphery thereof, and further protruding the terminal 17 from the tip of the drawer 15. Have been. On both left and right sides of the drawer 15, there are provided fixing portions 19, 19 formed by bending a tongue-shaped projection downward. The two portions 11, 11 of the contact forming member 10 are switch contacts.

The moving body 30 is made of a synthetic resin film (insulating film, in this embodiment, polyethylene terephthalate film having a thickness of 0.1 mm) in the shape of a disk, and a mounting portion 33 which penetrates into an oval shape at the center thereof. A plurality of circular through portions 31 are provided at regular intervals in a ring shape so as to surround the mounting portion 33.

Next, the elastic body 20 is formed by making the elastic metal plate into a slender and substantially rectangular shape, the tip of the stepped part is the arm part 23, the base part is the fixing part 25, and the arm part 2 is
A movable contact 21 protruding downward is provided at the tip of 3, a fixing hole 27 is provided in the fixing portion 25, and a terminal 29 is protruded.

FIG. 5A is an enlarged side view of the elastic body 20, and FIG. 5B is an enlarged back view. As shown in the figure, the movable contact 21 is formed so as to protrude downward (ie, toward the switch contact 11 side) in a conical shape.

Returning to FIG. 3, the driving body 60 is made of synthetic resin, so that the shafts 63, 6
5 is projected. The upper shaft 63 has a columnar shape, while the lower shaft 65 is formed in an oval cross section so as to fit into the mounting portion 33 of the moving body 30. Further, a click contact portion 67 is provided on the upper surface of the main body 61 by forming irregularities in a ring shape.

The click member 70 is formed of a substantially rectangular elastic metal plate, and has a circular penetrating portion 7 substantially at the center thereof.
1 and a pair of through holes 73, 73 at both ends thereof.
And a click arm 75 protruding in an arc shape so as to surround the periphery of the penetrating portion 71. At the center of the click arm 75, a click portion 77 bent downward is provided.

The cover 80 is made of a metal plate having a shape covering the case 40. A shaft support 81 for rotatably supporting the shaft 63 of the driving body 60 is provided substantially at the center thereof. Is provided with a fixing portion 83 which has a long tongue-like shape and is bent downwards by two, and a pair of through holes 85 penetrating therethrough are provided near the left and right sides.

In order to assemble the rotary pulse switch, first, the contact forming member 10 is housed in the case 40 and is brought into contact with the inner bottom surface of the case 40. At this time, terminal 17
Are projected from the central opening 45 of the case 40, and at the same time, the fixing portions 19, 19 are engaged with the engaging portions 49, 49 of the case 40 for positioning.

Next, the moving body 30 is placed on the contact forming member 10 so as to be in contact with the contact forming member 10, and then the moving body 30 is placed in the case 40 from above.
The two elastic bodies 20, 20 are housed, and at that time, the respective terminals 29, 29 are made to protrude outside from the left and right openings 45, 45 of the case 40, and at the same time, the locking portions 51, 51 are The fixing part 25 is fixed in a state in which the fixing part 25 is in contact with the inner bottom surface of the case 40 by inserting and caulking the tip thereof. At this time, the movable contact 21 of the elastic body 20 is
Or the through portion 3 of the moving body 30
1 and contacts the switch contact 11.

Next, the driving body 60 is inserted from above, the lower shaft 65 is fitted into the mounting portion 33 of the moving body 30, and the shaft of the case 40 is further inserted through the insertion hole 13 of the contact forming member 10. It is inserted into the support hole 431 and is supported by the shaft.

Next, the click member 70 is placed on the case 40, and at this time, the upper shaft 63 of the driving body 60 is inserted into the through portion 71, and at the same time, the locking portions 47, 47 of the case 40 are inserted into the two through holes 73, 73 and positioned. At this time, the click portion 77 elastically contacts the click contact portion 67 of the driving body 60.

Then, a cover 80 is put thereon, and at this time, the shaft 63 of the driving body 60 is inserted into the shaft support portion 81 to support it, and the locking portions 47, 47 pass through the two through holes 85, 85. At the same time, the fixing portion 83 is moved to the guide portion 43 of the case 40.
The rotary pulse switch is completed when it is inserted into the case and bent at the back side of the case 40.

FIG. 6 is a plan view showing the positional relationship between the two elastic bodies 20, 20 and the moving body 30 of the assembled rotary pulse switch. As shown in FIG.
The 0 movable contacts 21 and 21 are located on the movement locus of the rotating penetrating portion 31 of the moving body 30. In addition, both movable contacts 2
Numerals 1 and 21 are arranged at a slight angle θ from a straight line passing through the rotation center O of the moving body 30.

Next, the operation of the rotary pulse switch will be described. That is, when the driving body 60 is rotationally driven by the shaft 63, the click portion 77 of the click member 70 elastically contacts the click contact portion 67 on the upper surface of the driving body 60 to generate a click feeling, and at the same time, moves together with the driving body 60. The body 30 is driven to rotate.

As a result, the two movable contacts 21 and 21 ride on the upper surface of the moving body 30 and enter the through portion 31 repeatedly, and the ON / OFF of the lower contact forming member 10 with the switch contact 11 is pulsed. Is repeated.

By the way, in the case of this rotary pulse switch, the two movable contacts 21 and 21 are set at a small angle θ from the straight line passing through the rotation center O of the moving body 30 as shown in FIG. When the moving body 30 is rotated,
The ON / OFF timing of the movable contacts 21 and 21 to the switch contact 11 is always shifted by a minute timing. In the case of this embodiment, whether the rotation direction of the driving body 60 is clockwise or counterclockwise can be detected based on the shift. FIG. 7 is a diagram showing ON / OFF waveforms of both elastic bodies 20 at that time.

According to the rotary pulse switch, as described with reference to FIGS. 1 and 2, not only can the thickness of the switch mechanism be reduced, but also the movable contact 21 of the elastic body 20 can be a smooth synthetic resin movable body 30. Since it only slides on the top, its durability is improved.

Further, in the case of this embodiment, since the movable contact 21 of the elastic body 20 is formed so as to protrude in a conical shape,
The contact portion with the switch contact 11 becomes substantially point contact, so that the timing at which the movable contact 21 falls into the through portion 31 to turn on the switch contact 11 and the timing at which the movable contact 21 separates from the through portion 31 and turns off the switch contact 11 are both given. Be exactly constant. Therefore, even if the size of the switch mechanism is reduced and the movable contact 21 and the penetrating portion 31 are reduced, an error does not easily occur in the on / off timing, and the size can be easily reduced.

In particular, in the case of this embodiment, the switch mechanism can be formed on one ring-shaped line, so that the common pattern and the on / off pattern are formed concentrically on the substrate as in the conventional switch mechanism. The outer diameter can be reduced as compared with the structure in which the slider is brought into sliding contact with the slider.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible within the scope of the technical idea described in the claims. Needless to say.

That is, for example, in the above-described embodiment, the penetrating portions 31 are provided at equal intervals in the moving body 30, but if it is desired to obtain another on / off pattern, the length and shape of the penetrating portion 31 may be arbitrarily changed.

In the above embodiment, the present invention is applied to a rotary switch, but may be applied to a slide switch.

In the above embodiment, the moving body 30 is moved with respect to the contact forming member 10 and the elastic body 20, but the contact forming member 10 and the elastic body 20 may be moved with respect to the moving body 30. Alternatively, the contact forming member 10, the elastic body 20, and the moving body 30 may be moved at relatively different speeds. In short, it is sufficient if the moving body 30 moves relatively to the elastic body 20.

In the above embodiment, the movable contact 21 which comes into contact with and separates from the switch contact 11 has a conical shape.
Although accurate on / off output is obtained even when the movable contact 21 enters and exits the movable contact 21, the movable contact 21 can be applied to the elastic body 20 for a switch mechanism according to the present invention, and also can be described in the aforementioned conventional example. 8 may be applied to the movable contact 154 of the elastic body 150. In this case, there is no such thing as the moving body 30, and the movable contact 154 is merely pressed down and abuts on the switch contact 137.
Since the contact is substantially point contact, the on / off operation can be performed more accurately than in the conventional example.

The movable contact 21 is most preferably formed in a conical shape, but may be formed in another conical shape, for example, a quadrangular pyramid shape or a pentagonal pyramid shape. In short, it may be formed so as to project in a conical shape toward the switch contact side.

In the embodiment shown in FIGS. 3 and 4, the case 40, the contact forming member 10, and the elastic members 20 are formed as separate components.
The reference numerals 0 and 20 may be integrated by inserting the case 40 into a mold for molding. Elastic body 20,
Various modifications are possible, for example, the two fixing portions 25, 25 may be separately integrated with a mold resin material, and the integrated one may be inserted into the case 40 and incorporated.

In the above embodiment, a through hole is used as the penetrating portion 31. However, the penetrating portion 31 may have another shape such as a notch (comb shape).

[0049]

As described in detail above, the present invention has the following excellent effects. Since the switch mechanism can be constituted by the contact forming member, the elastic body disposed on the contact forming member, and the moving body sandwiched between the two, the switch mechanism can be reduced in thickness.

Since the movable contact of the elastic body does not slide on the contact forming member but only slides on the moving body, the wear can be easily prevented by using a smooth synthetic resin film or the like as the moving body so that the abrasion can be easily prevented. The performance is improved.

Since the movable contact of the elastic body is formed so as to protrude in a conical shape, the contact portion with the switch contact becomes substantially a point contact. Therefore, the accuracy of ON / OFF timing between the movable contact and the switch contact is improved, and this point is improved. Therefore, the size of the switch mechanism can be easily reduced. This effect is particularly useful for a switch mechanism having a structure in which a movable body is interposed between a switch contact and a movable contact and the movable contact is dropped or pulled up into a through portion of the movable body, such as the switch mechanism according to the present invention. Will be noticeable.

The switch mechanism can be formed on one line,
Therefore, the size can be reduced as compared with a conventional switch mechanism having a structure in which a slider is slid on a substrate in which two common patterns and an on / off pattern are formed in parallel on a substrate.

[Brief description of the drawings]

FIG. 1 is a basic structural diagram of a switch mechanism of the present invention.

FIG. 2 is an operation explanatory view of the switch mechanism of the present invention.

FIG. 3 is an exploded perspective view (upper part) showing an embodiment in which the switch mechanism according to the present invention is applied to a rotary pulse switch.

FIG. 4 is an exploded perspective view (lower part) showing an embodiment in which the switch mechanism according to the present invention is applied to a rotary pulse switch.

5A and 5B are diagrams showing an elastic body 20, FIG. 5A is an enlarged side view, and FIG. 5B is an enlarged back view.

FIG. 6 shows two elastic members 2 of the assembled rotary pulse switch.
It is a top view which shows the positional relationship between 0,20 and the moving body 30.

FIG. 7 is a diagram showing ON / OFF waveforms of both elastic bodies 20;

FIG. 8 is a schematic sectional view showing an example of a conventional switch mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Contact forming member 11 Switch contact 20 Elastic body (elastic body for on / off) 21 Movable contact 30 Moving body 31 Penetration part 40 Case 60 Driver 70 Click member 80 Cover

Claims (3)

[Claims] 1. A contact forming member provided with a switch contact, an elastic body provided with a movable contact in contact with the switch contact, and a moving body provided with a penetrating portion, wherein the contact forming member and the elastic body are provided. By installing the moving body between, by moving the moving body relative to the elastic body,
A switch mechanism characterized in that an elastic movable contact is inserted into and removed from a penetrating portion of a moving body to turn on and off a movable contact and a switch contact. 2. The switch mechanism according to claim 1, wherein said movable body is a flat insulating plate. 3. An on / off elastic body provided with a movable contact that is turned on and off between the switch contact by coming into contact with and separating from the switch contact, wherein the movable contact has a conical shape toward the switch contact side. An on-off elastic body, which is formed so as to protrude from the body.