TWI690964B - power switch button - Google Patents

Abstract

The object of the present invention is to extend the operation stroke of the push button switch and improve the durability of the movable contact. A push-button switch according to an embodiment of the present invention includes: a central fixed contact; a peripheral fixed contact, which is disposed around the central fixed contact; a first movable contact having a first dome and formed on the aforementioned The first outer peripheral portion of the outer periphery of the first dome, and the first outer peripheral portion is disposed on the peripheral fixed contact such that the first dome is located above the central fixed contact; the second movable contact , Which has a second dome, and a second outer peripheral portion formed on the outer periphery of the second dome, and is disposed on the first movable contact; and an operating member, which is disposed on the second movable contact Above, the first movable contact and the second movable contact can be pressed; and a gap is formed between the first dome and the second dome.

Description

power switch button

The invention relates to a button switch.

In recent years, the industry has promoted the miniaturization of pushbutton switches with dome-shaped movable contacts. If the button switch is miniaturized, the operation stroke is shortened and the durability of the movable contact is reduced. Therefore, the expansion of the operation stroke and the improvement of the durability of the movable contact are expected for the small-sized push button switch. In order to cope with such requirements, a method for overlapping a plurality of movable contacts of the same shape has been proposed previously. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Unexamined Patent Publication No. 2005-302643

[Problems to be solved by the invention]

However, in the aforementioned previous method, although the durability of the movable contact is improved, it is difficult to expand the operation stroke.

The present invention has been completed in view of the above-mentioned problems, and its object is to increase the operation stroke of the push button switch and improve the durability of the movable contact. [Technical means to solve the problem]

The push button switch of an embodiment includes: a central fixed contact; a peripheral fixed contact, which is arranged around the central fixed contact; a first movable contact having a first round top and formed on the first round The first outer peripheral portion of the outer periphery of the top, and the first outer peripheral portion is arranged on the peripheral fixed contact in such a manner that the first round top portion is located above the central fixed contact; the second movable contact has A second dome and a second outer peripheral portion formed on the outer periphery of the second dome and arranged on the first movable contact; and an operating member arranged on the second movable contact Pressing the first movable contact and the second movable contact; and forming a gap between the first dome and the second dome. [Effect of invention]

According to the embodiments of the present invention, the operation stroke of the push button switch can be enlarged, and the durability of the movable contact can be improved.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In addition, in the description of the description and the drawings of each embodiment, for the constituent elements having substantially the same functional structure, the same symbols are used to omit redundant explanations.

<First Embodiment> The push switch 100 of the first embodiment will be described with reference to FIGS. 1 to 4. First, the schematic configuration of the button switch 100 will be described. FIG. 1 is a cross-sectional view showing an example of a button switch 100. The push button switch 100 of FIG. 1 includes: a housing 1, a central fixed contact 2, a peripheral fixed contact 3, two connection terminals 4, a cover 5, a first movable contact 6, a second movable contact 7, and an operating member 8.

2 is a plan view showing the push button switch 100 of FIG. In the example of FIG. 2, the cover 5, the first movable contact 6, the second movable contact 7, and the operating member 8 are removed from the button switch 100.

Hereinafter, the direction of the push-button switch 100 (up, down, left, right, and left) will be described with reference to FIG. 1, but the direction of the push-button switch 100 is not limited to this.

The case 1 is formed of an insulating resin with an open upper casing, and includes a bottom plate portion 11, an annular side plate portion 12 extending upward from the bottom plate portion 11, a storage portion 13, and a regulation portion 14. In addition, in the example of FIG. 2, the shape of the housing 1 when viewed in plan is rectangular, but it is not limited to this.

The storage portion 13 is a space surrounded by the bottom plate portion 11, the side plate portions 12, and the cover 5, and stores the central fixed contact 2, the peripheral fixed contact 3, the first movable contact 6, the second movable contact 7, and the operating member 8.

The regulation portion 14 is a portion that regulates the movement of the first movable contact 6 and the second movable contact 7 and is provided on the outer peripheral portion of the upper surface of the bottom plate portion 11. The regulation unit 14 has a first regulation unit 141 and a second regulation unit 142.

The first regulation portion 141 is a portion protruding upward from the outer periphery of the upper surface of the bottom plate portion 11. The first regulating section 141 is fitted with the first movable contact 6 and the second movable contact 7, and regulates the front, rear, left, and right directions of the first movable contact 6 and the second movable contact 7 (planar direction perpendicular to the vertical direction) 'S move.

The second regulation portion 142 is a portion that protrudes from the upper end portion of the first regulation portion 141 toward the central portion of the bottom plate portion 11. The second regulation part 142 covers the upper part of the first movable contact 6 and the second movable contact 7 fitted with the first regulation part 141, and regulates the direction above the first movable contact 6 and the second movable contact 7 mobile.

The central fixed contact 2 is a contact formed of a conductive metal plate and arranged at the central portion of the upper surface of the bottom plate portion 11. The central fixed contact 2 is embedded in the bottom plate portion 11 by insert molding, for example, so that a part of its upper surface is exposed from the bottom plate portion 11. In addition, the central fixed contact 2 may be fixed to the upper surface of the bottom plate portion 11 with an adhesive or solder. In addition, in the example of FIG. 2, the shape of the central fixed contact 2 in a plan view is circular, but it is not limited to this.

The peripheral fixed contact 3 is a contact formed by a conductive metal plate and arranged around the central fixed contact 2 of the bottom plate portion 11. The peripheral fixed contact 3 is embedded in the bottom plate portion 11 by insert molding, for example, so that a part of its upper surface is exposed from the bottom plate portion 11. In addition, the peripheral fixed contact 3 may be fixed to the upper surface of the bottom plate portion 11 with an adhesive or solder. In addition, in the example of FIG. 2, the push switch 100 includes two peripheral fixed contacts 3, but it may include one or more than three. In addition, the shape of the peripheral fixed contact 3 viewed from the plane is rectangular, but it is not limited to this.

The connection terminal 4 is a terminal for electrically connecting the push switch 100 and an external device. The connection terminal 4 protrudes outward from the side plate portion 12, and inside the bottom plate portion 11, one connection terminal 4 is electrically connected to the central fixed contact 2 and the other connection terminal 4 is electrically connected to the peripheral fixed contact 3. The output signal of the button switch 100 is output via the connection terminal 4. In addition, in the example of FIG. 2, the push switch 100 includes two connection terminals 4, but may include three or more. In addition, the connection terminal 4 may protrude outward from the bottom plate portion 11.

The cover 5 is a plate-shaped member having an opening 51 through which the operation member 8 is inserted, and is arranged at the upper end of the side plate 12. The cover 5 may be fixed to the upper end of the side plate 12 by an adhesive, or may be fitted to the upper end of the side plate 12. In the example of FIG. 2, since the opening of the upper portion of the housing 1 is rectangular, the shape of the cover 5 when viewed from the plane is also rectangular. However, the shape of the cover 5 when viewed in plan is not limited to a rectangle, and may be any shape corresponding to the opening of the upper portion of the housing 1.

The first movable contact 6 is a circular dome-shaped contact formed by a metal plate in plan view. The first movable contact 6 is arranged on the bottom plate portion 11. The first movable contact 6 has a first dome portion 61 and a first outer peripheral portion 62.

The first dome portion 61 is a spherical portion located at the center of the first movable contact 6. The first dome 61 projects upward when there is no load, and reverses when pressed from above (projects downward). When the pressing from above is completed, the inverted first dome 61 returns to its original shape (protruding upward). The first movable contact 6 is in such a way that the lower surface of the inverted first dome 61 (first dome 61 projecting downward) can contact the central fixed contact 2, that is, the uninverted The first dome 61 is arranged to face the central fixed contact 2.

The first outer peripheral portion 62 is a portion formed on the outer periphery of the first dome portion 61, has a side shape of a truncated cone, and is disposed on the upper surface of the bottom plate portion 11. Since the first movable contact 6 is formed by one metal plate, the inner peripheral edge of the first outer peripheral portion 62 is connected to the outer peripheral edge of the first dome portion 61. The first movable contact 6 is arranged such that the first outer peripheral portion 62 contacts the peripheral fixed contact 3, that is, the first outer peripheral portion 62 is located above the peripheral fixed contact 3. In addition, the first movable contact 6 is arranged so that the first outer peripheral portion 62 and the first regulating portion 141 are fitted. The shape of the first movable contact 6 will be described in detail later.

The second movable contact 7 is a circular dome-shaped contact formed by a metal plate in a plan view. The second movable contact 7 is arranged on the first movable contact 6 so as to overlap. The second movable contact 7 has a second dome portion 71 and a second outer peripheral portion 72.

The second dome portion 71 is a spherical portion located at the center of the second movable contact 7. The second dome portion 71 protrudes upward when there is no load, and reverses when pressed from above (protrudes downward). When the pressing from above is completed, the reversed second dome 71 returns to its original shape (protruding upward). The second movable contact 7 is arranged such that the second dome 71 and the first dome 61 face each other.

The second outer peripheral portion 72 is formed at the outer periphery of the second dome portion 71, has a side shape of a truncated cone, and is disposed on the first movable contact 6. Since the second movable contact 7 is formed by one metal plate, the inner peripheral edge of the second outer peripheral portion 72 is connected to the outer peripheral edge of the second dome portion 71. The second movable contact 7 is arranged so that the second outer peripheral portion 72 is fitted with the first regulating portion 141. The shape of the second movable contact 7 will be described in detail later.

The operating member 8 is made of insulating resin. The operating member 8 is housed in the storage portion 13 so as to be movable in the up-down direction, and is arranged on the second movable contact 7 so as to be able to press the first movable contact 6 and the second movable contact 7. The operation member 8 has a button portion 81, a pressing portion 82, and a flange portion 83.

The button portion 81 is a portion for the user of the button switch 100 to press and operate. The button portion 81 is formed so as to protrude upward from the flange portion 83, and is arranged so as to protrude outward from the opening portion 51 toward the housing portion 13.

The pressing portion 82 presses the first movable contact 6 and the second movable contact 7. The pressing portion 82 is formed so as to protrude downward from the flange portion 83 and is arranged so that the lower surface contacts the upper surface of the second dome portion 71.

The flange portion 83 regulates the upward movement of the operation member 8. The flange portion 83 is formed wider than the opening portion 51 between the button portion 81 and the pressing portion 82. The flange portion 83 is accommodated in the accommodating portion 13 and arranged so that its upper surface contacts the lower surface of the cover 5. The upward movement of the operation member 8 is regulated by the flange portion 83 contacting the cover 5. In addition, the operation member 8 that is not pressed and operated by the user may be pushed upward by the first movable contact 6 and the second movable contact 7 and pressed by the flange portion 83 to the lower surface of the cover 5 be kept. By adopting such a structure, the looseness when not operated disappears, and the click sound when vibration is applied can be eliminated.

Next, the shapes of the first movable contact 6 and the second movable contact 7 will be described in detail. First, the design elements of the first movable contact 6 will be described. The design elements of the second movable contact 7 are the same as those of the first movable contact 6, so the description is omitted.

FIG. 3 is a cross-sectional view showing an example of the first movable contact 6. FIG. The first movable contact 6 has, as design elements, material, plate thickness T, operation stroke S, peak load L, overall radius R, dome radius r, inclination angle θ, curvature radius CR, and width W.

The material is the material of the metal plate forming the first movable contact 6. The material of the first movable contact 6 is, for example, stainless steel, but it is not limited to this. The plate thickness T is the thickness of the metal plate forming the first movable contact 6. The material and plate thickness T of the first movable contact 6 are determined according to durability, price, and ease of processing.

The operation stroke S is the height from the installation surface of the first movable contact 6 (the plane passing through the lower end of the first outer peripheral portion 62) to the top lower surface of the first dome 61. The peak load L is a load that reverses the first dome 61 by being applied from above. The operation stroke S and the peak load L are determined according to the specifications of the first movable contact 6.

The overall radius R is the radius of the shape of the first movable contact 6 when viewed from the plane. The overall radius R is determined according to the size of the storage portion 13.

The radius r of the dome is the radius of the shape viewed from the plane of the first dome 61. The inclination angle θ is the angle formed by the first outer peripheral portion 62 and the installation surface of the first movable contact 6. The radius of curvature CR is the radius of curvature of the first dome 61. The width W is the length from the inner peripheral edge to the outer peripheral edge of the first outer peripheral portion 62. The dome radius r, the inclination angle θ, the radius of curvature CR, and the width W are determined according to the specifications of the first movable contact 6.

When the material, overall radius R, plate thickness T, operating stroke S, and peak load L of the first movable contact 6 have been determined, the radius of the dome r, the angle of inclination θ, the radius of curvature CR, and the width W are satisfied It is determined by the determined overall radius R, operating stroke S, and peak load L. Since the dome radius r, the inclination angle θ, the radius of curvature CR, and the width W are closely related to each other, when any design element is determined, the remaining design elements are also automatically determined. For example, when the inclination angle θ is determined, the dome radius r, the radius of curvature CR, and the width W satisfying the overall radius R, the operation stroke S, and the peak load L are automatically determined. In this way, the design freedom of the first movable contact 6 is small. This situation is also the same for the second movable contact 7.

Next, the relationship between the first movable contact 6 and the second movable contact 7 will be described. In the following, "6" is assigned to the design element of the first movable contact 6, and "7" is assigned to the design element of the second movable contact 7.

4 is a cross-sectional view showing an example of the first movable contact 6 and the second movable contact 7. As described above, the first movable contact 6 and the second movable contact 7 are formed so as to be fitted into the first regulation portion 141. Therefore, the overall radius R6 of the first movable contact 6 is equal to the overall radius R7 of the second movable contact 7.

In addition, the operation stroke S0 and the peak load L0 of the entire movable contact including the first movable contact 6 and the second movable contact 7 are given as specifications. The operation strokes S6 and S7 and the peak loads L6 and L7 are determined to satisfy the operation stroke S0 and the peak load L0. For example, either of the peak loads L6 and L7 is determined to be about half of the peak load L0. That is, it is determined such that the total value of the peak load L6 and the peak load L7 is the peak load L0. The peak load L6 is preferably 90% or more and 110% or less of the peak load L7. In this way, by setting the peak loads L6 and L7 to be substantially equal, the design of the first movable contact 6 and the second movable contact 7 can be simplified.

In this embodiment, the first movable contact 6 and the second movable contact 7 determine each design element so that a gap C is formed between the first dome 61 and the second dome 71. In the previous push-button switch, since the plurality of movable contacts have the same shape, no gap is formed between the movable contacts. Therefore, in the previous push button switch, the operation stroke of the movable contact arranged at the bottom becomes the operation stroke of the entire movable contact. On the other hand, in this embodiment, since the gap C is formed between the first dome 61 and the second dome 71, the operation stroke S6 of the first movable contact 6 and the height H of the gap C (from the first The total distance from the upper surface of the top of the dome 61 to the lower surface of the top of the second dome 71 becomes the total operation stroke S0 of the movable contact. In this way, according to the present embodiment, the operation stroke S0 can be expanded compared to the previous push button switch.

In the present embodiment, the inclination angle θ6 is determined to be greater than the inclination angle θ7 so that a gap C is formed between the first dome 61 and the second dome 71. For example, the inclination angle θ6 is 17.5 degrees, and the inclination angle θ7 is 12.5 degrees. As described above, if the inclination angle θ6 and the inclination angle θ7 are determined, a method of satisfying the height H of the operation stroke S6 and the clearance C corresponding to the operation stroke S0 and the peak loads L6 and L7 corresponding to the peak load L0 , Automatically determine the radius of dome r6, r7, radius of curvature CR6, CR7, and width W6, W7. As a result, as shown in FIG. 4, the dome radius r6 is determined to be larger than the dome radius r7, the radius of curvature CR6 is determined to be greater than the radius of curvature CR7, and the width W6 is determined to be narrower than the width W7.

It can be seen from the above that in this embodiment, the inclination angle θ6 is greater than the inclination angle θ7 (θ6>θ7), the dome radius r6 is greater than the dome radius r7 (r6>r7), and the radius of curvature CR6 is greater than the radius of curvature CR7 (CR6> CR7), the width W6 is narrower than the width W7 (W6<W7). By forming the first movable contact 6 and the second movable contact 7 in this way, the upwardly convex flexion portion of the second outer peripheral portion 72 and the first movable contact 6, that is, the first outer peripheral portion The inner peripheral edge of 62 contacts the connecting portion of the outer peripheral edge of the first dome 61, and the inner peripheral edge of the second outer peripheral portion 72 is separated from the first movable contact 6. As a result, the second dome portion 71 is separated from the first dome portion 61, and a gap C is formed.

As described above, according to the present embodiment, by overlapping the first movable contact 6 and the second movable contact 7, the durability of the entire movable contact can be improved. Furthermore, by forming a gap C between the first movable contact 6 and the second movable contact 7, the operating stroke L of the push button switch 100 (the entire movable contact) can be enlarged.

In addition, the materials and plate thicknesses T6 and T7 of the first movable contact 6 and the second movable contact 7 may be determined according to durability, price, ease of processing, etc., and may be the same or different. By setting the first movable contact 6 and the second movable contact 7 to the same material and plate thickness T6 and T7, the design of the first movable contact 6 and the second movable contact 7 can be simplified.

In addition, one or more movable contacts may be further overlapped on the first movable contact 6 and the second movable contact 7. For example, at least one above and below the first movable contact 6 may be overlapped with a movable contact of the same shape as the first movable contact 6, or at least one above and below the second movable contact 7 In one, the movable contacts having the same shape as the second movable contact 7 are overlapped. With this, the durability of the entire movable contact can be further improved.

<Second Embodiment> The push switch 100 of the second embodiment will be described with reference to FIG. 5. In this embodiment, another example of the first movable contact 6 and the second movable contact 7 will be described. The configuration of the push switch 100 of this embodiment is the same as that of the first embodiment except for the first movable contact 6 and the second movable contact 7.

FIG. 5 is a cross-sectional view showing an example of the first movable contact 6 and the second movable contact 7. As shown in FIG. 5, in this embodiment, the second movable contact 7 further includes a third outer peripheral portion 73.

The third outer peripheral portion 73 is a portion formed on the outer periphery of the second outer peripheral portion 72 and has a side shape of a truncated cone. Since the second movable contact 7 is formed by one metal plate, the inner peripheral edge of the third outer peripheral portion 73 is connected to the outer peripheral edge of the second outer peripheral portion 72. The second movable contact 7 may be arranged so that the third outer peripheral portion 73 is fitted to the first regulating portion 141 instead of the second outer peripheral portion 72. In other words, the second movable contact 7 is formed so as to be fitted into the first regulation part 141. Therefore, the overall radius R6 of the first movable contact 6 is equal to the overall radius R7 of the second movable contact 7.

In the present embodiment, the inclination angle θ6 is determined to be smaller or larger than the inclination angle θ7a of the second outer peripheral portion 72 so that a gap C is formed between the first dome 61 and the second dome 71. For example, the inclination angle θ6 is 12.5 degrees, and the inclination angle θ7a is 17.5 degrees. In addition, the inclination angle θ6 is determined to be greater than the inclination angle θ7b of the third outer peripheral portion 73 so that the contact between the first outer peripheral portion 62 and the second outer peripheral portion 72 does not hinder the third outer peripheral portion 73. Further, the radius of curvature CR6 is determined to be greater than the radius of curvature CR7, and the width W6 is determined to be wider than the width W7a of the second outer peripheral portion 72 and the width W7b of the third outer peripheral portion 73. In addition, in this embodiment, the size relationship of the dome radii r6 and r7a depends on other design elements.

It can be seen from the above that in this embodiment, the inclination angle θ6 is greater than the inclination angle θ7b (θ6>θ7b), the curvature radius CR6 is greater than the curvature radius CR7 (CR6>CR7), and the width W6 is wider than the widths W7a, W7b (W6>W7a , W7b). When the first movable contact 6 and the second movable contact 7 are formed so that the inclination angle θ6 is smaller than the inclination angle θ7a, as shown in FIG. 5, the first outer peripheral portion 62 and the second movable contact 7 project downward The raised flexion portion, that is, contacts the connecting portion of the outer peripheral edge of the second outer peripheral portion 72 and the inner peripheral edge of the third outer peripheral portion 73, and the inner peripheral edge of the second outer peripheral portion 72 is separated from the first movable contact 6. As a result, the second dome portion 71 is separated from the first dome portion 61, and a gap C is formed. On the other hand, when the first movable contact 6 and the second movable contact 7 are formed so that the inclination angle θ6 is greater than the inclination angle θ7a, the second outer peripheral portion 72 and the first movable contact are the same as the first embodiment The upwardly convex flexion portion 6 is in contact with the inner peripheral edge of the first outer peripheral portion 62 and the connecting portion of the outer peripheral edge of the first dome portion 61, and the inner peripheral edge of the second outer peripheral portion 72 is movable with the first Contact 6 is separated. As a result, the second dome portion 71 is separated from the first dome portion 61, and a gap C is formed.

As described above, according to the present embodiment, by overlapping the first movable contact 6 and the second movable contact 7, the durability of the entire movable contact can be improved. Furthermore, by forming a gap C between the first movable contact 6 and the second movable contact 7, the operating stroke L of the push button switch 100 (the entire movable contact) can be enlarged.

Furthermore, according to the present embodiment, the radius r7b can be adjusted by adjusting the width W7b and the inclination angle θ7b of the third outer peripheral portion 73 regardless of the operation stroke S7 and the peak load L7 of the second movable contact 7. The radius r7b is the radius of the shape of the portion of the second movable contact 7 excluding the third outer peripheral portion 73 in plan view, and corresponds to the overall radius R7 of the first embodiment. In this manner, according to the present embodiment, the radius r7b (the overall radius R7 of the first embodiment) can be determined to be any value smaller than the radius R6, so that the degree of design freedom can be improved compared to the first embodiment.

In addition, the materials and plate thicknesses T6 and T7 of the first movable contact 6 and the second movable contact 7 may be determined according to durability, price, ease of processing, etc., and may be the same or different. By setting the first movable contact 6 and the second movable contact 7 to the same material and plate thickness T6 and T7, the design of the first movable contact 6 and the second movable contact 7 can be simplified.

In addition, one or more movable contacts may be further overlapped on the first movable contact 6 and the second movable contact 7. For example, at least one above and below the first movable contact 6 can be overlapped with a movable contact of the same shape as the first movable contact 6 or above and below the second movable contact 7 At least one of them overlaps the movable contact of the same shape as the second movable contact 7. With this, the durability of the entire movable contact can be further improved.

In addition, it is possible to combine with other requirements on the configuration and the like mentioned in the above embodiment, but the present invention is not limited to the configuration shown here. These points can be changed without departing from the scope of the present invention, and can be appropriately determined according to the application form.

1‧‧‧Case 2‧‧‧ Central fixed contact 3‧‧‧Peripheral fixed contact 4‧‧‧Connecting terminal 5‧‧‧ Cover 6‧‧‧ First movable contact 7‧‧‧ Second movable contact Point 8 ‧ ‧ ‧ operating member 11 ‧ ‧ ‧ bottom plate section 12 ‧ ‧ side plate section 13 ‧ ‧ ‧ storage section 14 ‧ ‧ ‧ regulatory section 51 ‧ ‧ ‧ opening section 61 ‧ ‧ ‧ first round top 62 ‧ ‧ ‧ 1 Outer peripheral part 71‧‧‧ 2nd dome 72‧‧‧‧ Second outer peripheral part 73‧‧‧ Third outer peripheral part 81‧‧‧Button part 82‧‧‧Press part 83‧‧‧Flange part 100‧‧‧ Button switch 141‧‧‧ 1st regulation part 142‧‧‧ 2nd regulation part C‧‧‧ clearance CR‧‧‧ curvature radius CR6‧‧‧ curvature radius CR7‧‧‧ curvature radius H‧‧‧ height r‧‧‧ Dome radius r6‧‧‧Dome radius r7‧‧‧Dome radius r7a‧‧‧Dome radius r7b‧‧‧Radius R‧‧‧Overall radius R6‧‧‧Overall radius R7‧‧‧Overall radius S‧‧ ‧Operation stroke S6‧‧‧Operation stroke S7‧‧‧Operation stroke T‧‧‧Thickness T6‧‧‧Thickness T7‧‧‧Thickness W‧‧‧Width W6‧‧‧Width W7‧‧‧Width W7a‧ ‧‧Width W7b‧‧‧Width θ‧‧‧Tilt angle θ6‧‧‧Tilt angle θ7‧‧‧Tilt angle θ7a‧‧‧Tilt angle θ7b‧‧‧Tilt angle

FIG. 1 is a cross-sectional view showing an example of a button switch. FIG. 2 is a plan view showing the push button switch of FIG. 1. FIG. 3 is a cross-sectional view showing an example of the first movable contact. 4 is a cross-sectional view showing an example of the first movable contact and the second movable contact. 5 is a cross-sectional view showing an example of a button switch.

1‧‧‧Housing

2‧‧‧ Central fixed contact

3‧‧‧Peripheral fixed contact

4‧‧‧Connect terminal

5‧‧‧ Cover

6‧‧‧ First movable contact

7‧‧‧ 2nd movable contact

8‧‧‧operating member

11‧‧‧Bottom board

12‧‧‧Side board

13‧‧‧Storage Department

14‧‧‧ Regulation Department

51‧‧‧Opening

61‧‧‧1st round top

62‧‧‧1st outer periphery

71‧‧‧2nd round top

72‧‧‧2nd outer periphery

81‧‧‧ Button

82‧‧‧Pressing part

83‧‧‧Flange

100‧‧‧button switch

141‧‧‧ 1st Regulation Department

142‧‧‧Regulation 2

Claims (9)

A push-button switch comprising: a central fixed contact; a peripheral fixed contact, etc. arranged around the central fixed contact; a first movable contact having a first round top and formed on the first round top The first outer peripheral portion of the outer periphery, and the first outer peripheral portion is disposed on the peripheral fixed contact such that the first round top portion is located above the central fixed contact; the second movable contact has the first 2 dome, and a second outer peripheral portion formed on the outer periphery of the second dome, and arranged on the first movable contact; and an operating member, which is arranged on the second movable contact and can be pressed The first movable contact and the second movable contact; and a gap is formed between the first dome and the second dome; and the peak load of the first movable contact is the second movable contact The peak load is more than 90% and less than 110%. As in the button switch of claim 1, wherein the radius of the first movable contact is equal to the radius of the second movable contact. As in the button switch of claim 1, wherein the inclination angle of the first outer peripheral portion is greater than the inclination angle of the second outer peripheral portion. As in the push button switch of claim 2, wherein the inclination angle of the first outer peripheral portion is greater than the second The angle of inclination of the outer periphery. As in the button switch of claim 2, wherein the radius of curvature of the first round top is greater than the radius of curvature of the second round top. Like the push button switch of claim 3, wherein the radius of curvature of the first round top is greater than the radius of curvature of the second round top. As in the push button switch of claim 4, wherein the radius of curvature of the first round top is greater than the radius of curvature of the second round top. As in the button switch of claim 1, wherein the width of the first outer peripheral portion is narrower than the width of the second outer peripheral portion. The push button switch of claim 1, wherein the second movable contact has a third outer peripheral portion formed on the outer periphery of the second outer peripheral portion, and the inclination angle of the first outer peripheral portion is smaller than the second outer peripheral portion and the third outer peripheral portion The inclination angle of the portion, the curvature radius of the first dome portion is smaller than the curvature radius of the second dome portion, and the width of the first outer peripheral portion is wider than the width of the third outer peripheral portion.

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