TWI681428B - power switch button - Google Patents

Abstract

A push button switch, comprising: a base (1); a button (3), which is installed in an accessible/detachable manner relative to the base (1); a coil spring (4), which is arranged between the base (1) and the button (3) Between the base (1) and the knob (3), or the knob (3) and the coil spring (4). 4) Support the end of the coil spring (4) in a swingable manner with respect to the base (1) or the button (3).

Description

power switch button

This disclosure is about a push button switch.

Patent Document 1 discloses a push button switch having a structure in which a cylindrical guide post protrudes from a base body, guides a light guide body on the inner diameter side of the guide post, and is pressed by a coil spring arranged on the outer diameter side To elastically support the button.

[Prior Art Literature] [Patent Literature]

[Patent Document 1] Specification of Chinese Patent Application Publication No. 104851727

However, when the button switch is used in a keyboard or the like and used as an operation key of game software, an operation such as popping up from a state where the button switch is pressed may be performed. In this case, the coil spring expands and contracts only in the pressing direction of the push button switch, so it is difficult to attenuate and it causes a strange sound.

An object of the present disclosure is to provide a push button switch that can dampen vibration of a coil spring used as quickly as possible and effectively suppress surging.

The present disclosure provides a push button switch as an example of a means to solve the problem, which includes: A base; a button, which is installed in an accessible/detachable manner with respect to the base; a coil spring, which is arranged between the base and the button, and urges the button in a direction of separation from the base; and The protruding portion is arranged between the base body or the button and the coil spring, and supports the end of the coil spring so as to be swingable relative to the base body or the button.

According to the push-button switch as an example of the present disclosure, the urging force of the coil spring is caused by releasing the finger from the pressed button to cause the button to protrude in the separating direction. Even so, since the coil spring is swingably The end portion of the supporting portion supports the protruding portion, so the coil spring not only exerts force in the direction of the central axis, but also in the direction inclined with respect to the central axis. As a result, the vibration of the coil spring can be attenuated as soon as possible to effectively suppress chattering.

1‧‧‧Matrix

2‧‧‧Light guide (light guide member)

3‧‧‧ button

4‧‧‧coil spring

5‧‧‧Contact opening and closing mechanism

6‧‧‧slider

7‧‧‧ Lifting mechanism

8‧‧‧Bottom

9‧‧‧Square frame

10‧‧‧ opening

11‧‧‧ The locked part

12‧‧‧The first installation station

13‧‧‧Second installation station

14‧‧‧The first locking groove

15‧‧‧The first terminal hole

16‧‧‧The first locking protrusion

17‧‧‧Second locking groove

18‧‧‧ 2nd locking protrusion

19‧‧‧ 2nd terminal hole

20a, 20b‧‧‧Depression

21a, 21b‧‧‧Side wall

22‧‧‧Flange

23‧‧‧Press out the prevention wall

24‧‧‧recess

24a‧‧‧groove

24b‧‧‧Escape recess

25‧‧‧Light guide body

25a‧‧‧Convex lens

25b‧‧‧Light Emitting Diode (LED)

26‧‧‧Elastomer receiving department

26a‧‧‧cut

27‧‧‧Main body

28‧‧‧Cylinder

29‧‧‧Claw

29a‧‧‧claw

30‧‧‧recess

31‧‧‧ Tablet Department

32‧‧‧Side wall part

33a, 33b‧‧‧ Extension

34‧‧‧Guiding Department

35‧‧‧Guide wall

36‧‧‧Abutment Department

36a‧‧‧Guide groove

37‧‧‧ Lifting protrusion

37a‧‧‧inclined surface

37b‧‧‧flat surface

38‧‧‧Bearing hole

39‧‧‧protrusion

40‧‧‧Support

41‧‧‧Fixed contact piece

42‧‧‧ activity contact film

43‧‧‧The first plane

44‧‧‧Fixed terminal

45‧‧‧The second plane

46‧‧‧The third plane

47‧‧‧ Fixed contact

48‧‧‧The fourth plane

49‧‧‧First locking protrusion

50‧‧‧First locking recess

51‧‧‧The first plane

52‧‧‧Mobile terminal

53‧‧‧The second plane

54‧‧‧The third plane

55‧‧‧Second locking protrusion

56‧‧‧Second locking recess

57‧‧‧ Highlighted

58‧‧‧ activity contact

59‧‧‧ Pushing Department

60‧‧‧1st inclined surface

61‧‧‧Concave curved surface

62‧‧‧The second inclined surface

64‧‧‧Guided protrusion

65‧‧‧flat

66‧‧‧ raised protrusion

66a‧‧‧inclined surface

66b‧‧‧flat surface

67‧‧‧ 1st arm

68‧‧‧ 2nd arm

69‧‧‧Shaft

70‧‧‧ Wrist

71‧‧‧1st axis

72‧‧‧ 2nd axis

73‧‧‧The first protrusion

74‧‧‧Bearing hole

75‧‧‧ 2nd protrusion

100, 110, 120 ‧‧‧ protrusion

101, 111, 121 ‧‧‧ 1st protrusion

102, 112, 122 ‧‧‧ 2nd protrusion

113‧‧‧ Ring protrusion

CL‧‧‧Central axis

FIG. 1 is a perspective view of a push switch of this embodiment.

FIG. 2 is a perspective view showing a state after the button is removed from FIG. 1.

Fig. 3 is an exploded perspective view of the push button switch shown in Fig. 1.

4A is a perspective view of the base of FIG. 3.

4B is a perspective view of FIG. 4A viewed from below.

FIG. 5A is a perspective view of the light guide of FIG. 3 viewed from above.

FIG. 5B is a perspective view of the light guide of FIG. 5A viewed from below.

6A is a perspective view of the button of FIG. 3 viewed from above.

6B is a perspective view of the button of FIG. 6A viewed from below.

7A is a perspective view of the fixed contact piece of FIG. 3.

7B is a perspective view of the fixed contact piece of FIG. 7A viewed from different angles.

8A is a perspective view of the movable contact piece of FIG. 3.

8B is a perspective view of the movable contact piece of FIG. 8A viewed from different angles.

9A is a perspective view of the slider of FIG. 3.

9B is a perspective view of the slider of FIG. 9A viewed from different angles.

Fig. 10 is a cross-sectional view taken along line X-X of Fig. 1.

FIG. 11 is a graph comparing changes in the vibration of the coil spring by a push button switch including a button with a protrusion and a push button switch without a protrusion of the present embodiment.

12 is a perspective view of a light guide according to another embodiment.

Fig. 13 is a perspective view of a button of another embodiment viewed from below.

14 is a perspective view of a light guide according to still another embodiment.

15 is a perspective view of a coil spring of another embodiment.

Hereinafter, an embodiment of the present disclosure will be described in accordance with the accompanying drawings. In addition, in the following description, terms indicating specific directions or positions (for example, terms including "up", "down", "side", and "end") are used as necessary, but these terms are used for ease To understand the disclosure with reference to the drawings, the technical scope of the disclosure is not affected by The meaning of these terms is limited. In addition, the following description is merely illustrative in nature, and is not intended to limit the present disclosure, its application, or its use. Furthermore, the drawings are schematic, and the ratio of each dimension is different from reality.

FIG. 1 is a perspective view showing the entire push switch of this embodiment. FIG. 2 is a perspective view showing a state where the button 3 is removed from FIG. 1. Fig. 3 is an exploded perspective view of the push button switch of Fig. 1. The button switch includes a base 1, a button 3, a coil spring 4, a contact opening and closing mechanism 5, a slider 6, and a lifting mechanism 7. The button 3 is installed in an accessible and separable (ie, accessible/separated) manner with respect to the base 1.

As shown in FIGS. 4A and 4B, the base 1 includes, for example, a synthetic resin material, and has a bottom 8 and a square frame 9. The bottom 8 is provided with a light guide 2 as an example of a light guide member.

In addition, the bottom portion 8 is formed with an opening 10 having a circular shape in plan view. A ring-shaped locked portion is formed at the central portion of the inner peripheral surface of the opening 10 in the vertical direction (that is, the direction orthogonal to the bottom 8 of the base 1 and the direction of the approach/separation of the button 3 relative to the base 1) Department 11. As described later, the locking claw 29 a of the light guide 2 is locked to the locked portion 11.

A first mounting base 12 and a second mounting base 13 are formed near the opening 10. A first locking groove 14 extending in the vertical direction is formed on the side surface of the first mounting base 12. The bottom 8 has a first terminal hole 15 connected to the first locking groove 14 and communicating with the lower surface. In addition, the first mounting base 12 includes a first locking protrusion 16 whose upper surface includes a convex arc surface. The second mounting base 13 also has the same structure as the first mounting base 12, and includes a second locking groove 17 and a second locking protrusion 18, and is formed on the bottom 8 There is a second terminal hole 19 communicating with the second locking groove 17. The fixed contact piece 41 is fixed to the first mounting table 12, and the movable contact piece 42 is fixed to the second mounting table 13. In addition, on the upper surface of one side of the bottom portion 8, a concave portion 20 a having a rectangular shape in plan view is formed in the center portion. In addition, recesses 20b are formed at the four corners of the bottom portion 8, respectively. When the button 3 is pressed, the lower end of the abutting portion 36 of the button 3 described below abuts on the bottom surface of the recessed portion 20b, thereby restricting further movement of the button 3.

The square frame portion 9 includes two sets of side wall 21 a and side wall 21 b facing each other, and a flange portion 22 is formed on the outside of these. The flange portion 22 is used to support the lifting mechanism 7 described later. A push-out prevention wall 23 is formed outside the flange portion 22 on the outside of the side wall 21 a facing each other. The push-out prevention wall 23 prevents the first arm 67 and the second arm 68 from being pushed out to the side. A recess 24 is formed in the center of the outer surface of the opposing side wall 21a. In the recess 24, the upper half of the side wall 21a includes a narrow groove 24a, and the lower half includes a larger recessed recess 24b than the groove 24a. The width dimension of the groove part 24a is formed in the width dimension which can be inserted in the state which folded the 1st arm 67 and the 2nd arm 68 mentioned later.

As shown in FIGS. 5A and 5B, the light guide 2 includes, for example, a translucent synthetic resin material, and has a truncated cone-shaped light guide body 25 and elasticity that protrudes in the radial direction from the lower end of the light guide body 25体承部 26。 Body receiving portion 26.

A plurality of convex lenses 25a are formed on the upper surface of the light guide body 25. With these convex lenses 25a, light from a light emitting diode (Light Emitting Diode, LED) 25b (see FIG. 5B) as a light source is diffused.

The elastic body receiving portion 26 has a flange shape, and includes a receiving portion body 27 in the upper half and a cylindrical body 28 in the lower half. In addition, the elastic body receiving portion 26 is circumferentially Three cuts 26a are formed in equal parts, and claw portions 29 are formed therein, respectively. The receiving portion body 27 and the cylindrical body 28 are divided into three arc-shaped portions by the cutout 26a. The outer diameter of the receiving body 27 is larger than the opening 10 of the base 1, and the lower surface of the receiving body 27 abuts the upper surface of the bottom 8. The outer surface of the cylindrical body 28 abuts on the inner surface of the opening 10, thereby positioning the light guide 2 in the radial direction relative to the base 1. In addition, the space surrounded by the lower surface of the receiving portion body 27 and the inner surface of the cylindrical body 28 becomes a recess 30 for arranging the LED 25b (not shown). The claw portion 29 extends downward like the cylindrical body 28, and a locking claw 29a protruding toward the outer diameter side is formed at the tip portion. The locking claw 29 a is locked to the locked portion 11 formed in the opening 10 of the base 1 to prevent the light guide 2 from falling out of the opening 10 to the upper side.

As shown in FIGS. 6A and 6B, the button 3 includes, for example, a synthetic resin material and has a rectangular shape in plan view. The button 3 includes a flat rectangular plate portion 31, side wall portions 32 extending downward from opposite sides of the flat plate portion 31, and extension portions 33a extending laterally from the remaining two opposite sides of the flat plate portion 31, extending部33b.

A substantially cylindrical guide portion 34 is formed in the center of the lower surface of the flat plate portion 31. A pair of protrusions 100 (ie, first protrusions 101 and second protrusions 102) extending from the guide portion 34 in the outer diameter direction are formed. The first protrusion 101 and the second protrusion 102 are arranged on the same straight line passing through the center of the guide portion 34 (that is, a position separated by 180° in the circumferential direction with respect to the center of the guide portion 34). In addition, the portions where the first protrusion 101 and the second protrusion 102 abut on the end of the coil spring 4 have a chevron shape or a U-shape, for example, a semicircular cross section, thereby suppressing the contact area of the two. Furthermore, protrusions The size of the portion 100 protruding from the flat plate portion 31 is set smaller than the guide portion 34 but larger than the strand diameter of the coil spring 4. By this, even if it is an arbitrary part of the upper end portion of the coil spring 4 (that is, the last turn of the coil spring 4) in a plan view, it can be reliably abutted against the first protrusion 101 and the second protrusion 102, Therefore, the first protrusion 101 and the second protrusion 102 support the end of the coil spring 4 in a swingable manner.

In addition, the first protrusion 101 and the second protrusion 102 are not necessarily limited to those that are 180° out of phase with respect to the center of the coil spring 4 and are arranged on the same straight line, but also include those that are shifted in position in the circumferential direction. In addition, the first protrusion 101 and the second protrusion 102 are not limited to semicircular cross-sections, but include various cross-sectional shapes that can reduce the contact area with the end of the coil spring 4 such as a triangular cross-section. In short, as long as the first protrusion 101 and the second protrusion 102 are as follows: the end of the coil spring 4 is pressed against the protrusion 100 and becomes unbalanced, so that the coil spring 4 is not only at its center In the axial direction, curling also occurs in a direction intersecting the central axis.

In addition, on the lower surface of the flat plate portion 31, guide walls 35 are provided along three sides. The opposing walls on both sides of the guide wall 35 are formed with contact portions 36 protruding more than other portions at both end portions, and portions other than the both end portions protrude inward. In addition, guide grooves 36 a for guiding the slider 6 are formed in the opposing portions of the abutment portions 36 located at both ends of the guide wall 35. A portion other than the upper and lower ends of one of the side walls constituting the guide groove 36a is cut off, and a lifting protrusion 37 is formed at the lower end. The lifting protrusion 37 includes a downward inclined surface 37a that is gradually inclined upward and a flat surface 37b on the upper side.

In the side wall portion 32, bearing holes 38 are formed at both end portions extending further downward. The first shaft portion 71 of the first arm 67 and the second arm 68 (described in FIG. 3) (Illustrated) are rotatably and slidably supported by the bearing holes 38, respectively.

Three protrusions 39 having concave arcuate surfaces are formed in one of the extensions 33a. The supporting portion 40 that supports the balance bar (not shown) includes the side edge of the flat plate portion 31 and the arc surface of the protrusion 39.

Returning to FIG. 3, the coil spring 4 is a wire made of a spiral, and is disposed between the elastic body receiving portion 26 of the light guide 2 and the guide portion 34 of the button 3, and the button 3 is upward with respect to the base 1. Apply force.

The contact opening and closing mechanism 5 includes a fixed contact piece 41 and a movable contact piece 42, which are formed by punching and bending a flat copper alloy.

As shown in FIGS. 7A and 7B, the fixed contact piece 41 includes: a first flat portion 43; a fixed terminal portion 44 extending downward from the center of the lower edge of the first flat portion 43; one end side of the first flat portion 43 The second plane portion 45 extending perpendicularly to the lower edge; the third plane portion 46 extending orthogonally from one end edge of the second plane portion 45; the fixed contact 47 provided on the third plane portion 46; The other end edge of the planar portion 43 extends orthogonally and faces the third planar portion 46 and the fourth planar portion 48. A first locking protrusion 49 that reaches the first flat portion 43 is formed in the central portion of the fixed terminal portion 44. The first locking protrusion 49 is locked in the first locking groove 14 formed in the first mounting base 12 of the base 1. The fixed terminal portion 44 is pressed into the first terminal hole 15 and protrudes from the lower surface of the bottom portion 8. In the fourth flat surface portion 48, a first locking concave portion 50 formed by cutting out a circular arc in the center of the lower edge is formed. The first locking recess 50 is locked to the first locking protrusion 16 of the first mounting base 12.

As shown in FIGS. 8A and 8B, the movable contact piece 42 includes: a first plane Portion 51; the movable terminal portion 52 extending downward from the lower edge of one end of the first planar portion 51; the second planar portion 53 extending orthogonally from one end of the first planar portion 51; A third plane portion 54 that extends orthogonally at the other end and partially faces the second plane portion 53. A second locking protrusion 55 reaching the first flat portion 51 is formed in the central portion of the movable terminal portion 52. In the second flat surface portion 53, a second locking concave portion 56 formed by cutting out a circular arc in the center of the lower edge is formed. The second locking recess 56 is locked to the second locking protrusion 18 of the first mounting base 12. The third flat portion 54 has a protruding piece 57 curved in a substantially C-shaped cross section at the center of the upper edge. The protruding piece 57 is pressed to the pressing portion 59 of the slider 6 described later to elastically deform the third flat portion 54 (and further the first flat portion 51). A movable contact 58 is provided on the outer surface of the distal end of the third plane portion 54.

As shown in FIGS. 9A and 9B, the slider 6 is a flat plate shaped by molding a synthetic resin material. The slider 6 includes a pressing portion 59 at the center. The pressing portion 59 includes a first inclined surface 60 that protrudes slowly from a lower side with a predetermined size from the upper end, and a concave curved surface 61 that is connected to the first inclined surface 60 and that has a slightly recessed center in the protruding portion. In addition, the pressing portion 59 includes a second inclined surface 62 whose protrusion size on the lower end side of the protrusion portion gradually decreases.

In addition, the slider 6 includes guided protrusions 64 at both end portions. The guided protrusion 64 is formed such that the central portion of the outer surface of the flat portion 65 provided at both end portions of the slider 6 is a left and right portion. The guided protrusion 64 is inserted into the guide groove 36a formed in the knob 3 and is guided to be movable up and down. In the flat portion 65, a raised protrusion 66 is formed below one of the two parts divided by the guided protrusion 64. Being lifted The upper surface of the activation protrusion 66 includes an inclined surface 66a that gradually protrudes downward, and the lower surface includes a flat surface 66b. The flat surface 37b of the lifting protrusion 37 abuts on the flat surface 66b of the raised protrusion 66, and is lifted together when the button 3 moves upward.

Returning to FIG. 3, the lifting mechanism 7 includes a first arm 67 and a second arm 68. The first arm 67 and the second arm 68 have substantially the same shape, and each have a shaft body 69 and a pair of arm portions 70 extending from both end portions of the shaft body 69. The first shaft portion 71 is formed at each end of each shaft body 69. A second shaft portion 72 and a first protrusion 73 protruding inward are formed on the tip side of one of the arm portions 70. A bearing hole 74 through which the second shaft portion 72 is rotatably inserted and a second protrusion 75 protruding inward are formed on the distal end side of the other arm 70.

The first arm 67 and the second arm 68 are inserted through the second shaft portion 72 of the first arm 67 into the bearing hole 74 of the second arm 68 and the second shaft portion 72 of the second arm 68 is inserted through the first The bearing 67 of the arm 67 is connected. The connected first arm 67 and second arm 68 are inserted into the groove portion 24a of the base body 1 in the folded state and unfolded in the retreat recess 24b, whereby the first protrusion 73 and the second protrusion 75 abut It comes in contact with the upper surface of the retreat recess 24b to prevent the base 1 from falling off. In addition, the connected first arm 67 and second arm 68 are connected to the button 3 by inserting the first shaft portion 71 into the bearing hole 38 of the button 3. By the first shaft portion 71 being in contact with the inner edge of the bearing hole 38, the movement of the knob 3 in the protruding direction is restricted. In addition, since the lower end of the contact portion 36 abuts on the bottom surface of the recessed portion 20 b of the base 1, the movement of the button 3 in the pressing direction is restricted.

Next, a method of assembling the push button switch configured as described above will be described.

The light guide 2 is arranged in the opening 10 of the bottom 8. Place the tube of the light guide 2 The shape 28 is inserted into the opening 10, and the flange 22 is brought into contact with the upper surface of the bottom 8. As a result, the locking claw 29 a of the claw 29 is locked to the locked portion 11 of the opening 10, thereby obtaining the base 1 including the light guide 2.

The coil spring 4 is arranged around the light guide 2 which is arranged in the opening 10 of the bottom 8. In this state, as shown in FIG. 10, the lower end portion of the coil spring 4 abuts on the elastic body receiving portion 26 of the light guide 2.

The fixed contact piece 41 is mounted on the first mounting base 12 of the base 1, and the movable contact piece 42 is mounted on the second mounting base 13. The fixed contact piece 41 is fixed to the base body 1 by pressing the fixed terminal portion 44 into the first terminal hole 15 of the base body 1 and locking the first locking protrusion 49 to the first card of the first mounting base 12 The locking groove 14 locks the first locking recess 50 to the first locking protrusion 16 of the first mounting base 12. The movable contact piece 42 is fixed to the base body 1 by pressing the movable terminal portion 52 into the second terminal hole 19 of the base body 1, and locking the second locking protrusion 55 to the second card of the second mounting base 13 The locking groove 17 locks the second locking recess 56 to the second locking protrusion 18 of the second mounting base 13. In this state, the movable contact 58 faces the fixed contact 47 in a closable manner.

The second shaft portion 72 of the first arm 67 is inserted into the bearing hole 74 of the second arm 68 and the second shaft portion 72 of the second arm 68 is inserted into the bearing hole 74 of the first arm 67 to connect the first 1臂67与第二臂68。 1 arm 67 and the second arm 68. Then, in the folded state, the first arm 67 and the second arm 68 are inserted into the recess 30 through the groove 24 a of the base body 1 and spread out in a V-shape. Furthermore, the guide groove 36 a of the button 3 guides the guided protrusion 64 of the slider 6. In this state, the first shaft portion 71 of the first arm 67 and the second arm 68 Insert into the bearing hole 38 of the button 3. With this, the button 3 is urged in the protruding direction by the urging force of the coil spring 4 disposed between the light guide 2 and the light guide 2. At this time, as shown in FIG. 10, the upper end of the coil spring 4 abuts on the first protrusion 101 and the second protrusion 102 formed in the knob 3. The first protrusion 101 and the second protrusion 102 each have a curved surface facing the upper end of the coil spring 4 and are formed in a semicircular cross section, and the curved surface makes point contact with the upper end of the coil spring 4. Therefore, when the button 3 is pressed, when the pressed state is released, the coil spring 4 acts on the button 3 not only in the direction of the central axis, but also in a direction inclined with respect to the central axis. In addition, since the first arm portion 67 and the first shaft portion 71 of the second arm 68 abut against the inner edge of the bearing hole 38, the movement of the knob 3 in the protruding direction is restricted.

The push button switch assembled in this manner is mounted on a printed board (not shown) equipped with LEDs 25b. During the installation of the button switch, the LED 25b enters the recess 30 of the light guide 2 located on the lower surface of the base 1. In addition, the button 3 is provided with a keycap (not shown) to become a key of the keyboard.

Next, the operation of the above-described push switch will be described.

In an initial state where a keycap (not shown) is not pressed, the button 3 is urged upward by the urging force of the coil spring 4, and each of the first shaft portions 71 of the first arm 67 and the second arm 68 It contacts the inner edge of each bearing hole 38 of the second arm 68 and the first arm 67. With this, the button 3 is positioned at the protruding position. In this state, the movable contact piece 42 presses the protruding piece 57 to the pressing portion 59 of the slider 6, and the movable contact 58 is separated from the fixed contact 47 of the fixed contact piece 41.

If the key cap is pressed against the urging force of the coil spring 4 and the button 3 is pressed, then The slider 6 also moves downward together. At this time, the pressure contact position of the protruding piece 57 of the movable contact piece 42 changes from the concave curved surface 61 of the slider 6 to the first inclined surface 60. As a result, the elastic energy accumulated in the third plane portion 46 of the movable contact piece 42 is converted into a force applied to the slider 6 downward. As a result, the slider 6 alone moves downward relative to the button 3 and causes the flat surface 66b at the lower end of the raised protrusion 66 to hit the flat surface 37b of the raised protrusion 37 of the button 3 to generate a sound. Since the slider 6 not only falls by its own weight, but also allows the elastic force from the movable contact piece 42 to act, the generated sound can be increased. Therefore, if it is a keyboard including the push button switch of the above configuration, the user can clearly recognize that the pressing operation has been properly performed. In addition, if the keyboard is used in a game or the like, a sufficient sound can be generated by its pressing operation, and it can be adapted to the usage situation. In addition, the movable contact piece 42 that has undergone elastic deformation recovers its shape and extends straight, so that the movable contact 58 and the fixed contact 47 are closed.

When the pressing operation of the button 3 is released, the button 3 moves upward by the urging force of the coil spring 4. When the button 3 moves upward, the urging force of the coil spring 4 acts on the button 3 via the first protrusion 101 and the second protrusion 102. The first protrusion 101 and the second protrusion 102 each have a curved surface facing the coil spring 4 and are formed in a semicircular cross-sectional shape, and the curved surface makes point contact with the upper end portion of the coil spring 4. Therefore, the upper end portion of the coil spring 4 is inclined, and not only the direction of the central axis CL (shown in FIG. 10) but also the direction intersecting the central axis CL exerts a force on the knob 3 to vibrate it. As a result, the elastic energy accumulated in the coil spring 4 can be consumed as soon as possible and the generated vibration can be attenuated rapidly. That is, the vibration of the coil spring 4 is suppressed, and the generation of abnormal sound can be prevented.

As described above, the first arm portion 67 and the first shaft portion 71 of the second arm 68 abut on the inner edge of the bearing hole 38, so that the button 3 returns to the initial position. Regarding the slider 6, the flat surface 37 b of the lifting protrusion 37 formed on the button 3 abuts against the flat surface 66 b of the raised protrusion 66 and is lifted, and the pressing portion 59 presses the protruding piece of the movable contact piece 42 57 causes the third flat portion 54 (and further the first flat portion 51) to elastically deform. By this, the movable contact 58 is separated from the fixed contact 47 and restored to the initial state.

FIG. 11 is a graph showing changes in the vibration of the coil spring 4 when the finger is released after the button 3 is pressed. In the figure, the solid line indicates the change in the vibration of the coil spring 4 including the push button switch of the configuration of the present embodiment, and the broken line indicates the change in the vibration of the coil spring 4 in the push button switch including the knob 3 without the protrusion 100. It is clear from the graph that in the push-button switch of this embodiment, after releasing the finger from the button 3, a sufficient attenuation is achieved in about 0.1 seconds. On the other hand, in the push-button switch without the protrusion 100 and including the button 3, it takes about 0.3 seconds to substantially dampen the vibration of the coil spring 4 approximately three times.

In addition, this disclosure is not limited to the structure described in the above-mentioned embodiment, and various changes can be made.

In the above embodiment, a pair of protrusions 100 is formed on the button 3, but it may be configured as described below.

In FIG. 12, a pair of protrusions 110 are formed on the light guide 2 of the base 1. That is, the third protrusion 111 and the fourth protrusion 112 are provided on the upper surface of the receiving portion body 27 of the elastic body receiving portion 26 so as to be located on the same straight line passing through the center of the light guide 2. With this protrusion 110, the urging force of the coil spring 4 acting on the button 3 can be made to the coil spring similarly to the protrusion 100 provided on the button 3 The central axis of 4 is inclined, and the vibration of the coil spring 4 can be suppressed. In this case, the protrusion 100 may not be formed on the button 3 side. When the protrusion 100 is formed on the button 3 side, it is preferable to shift the circumferential position in the plan view on the button 3 side from the base 1 side. Accordingly, the direction of curling and twisting can be different on the upper end side and the lower end side of the coil spring 4 by the protrusion 100 and the protrusion 110, respectively. As a result, the vibration of the coil spring 4 can be further quickly attenuated.

The structure of the light guide 2 shown in FIG. 12 is slightly different from the above-mentioned embodiment. That is, a concave portion (not shown) is formed on the lower surface of the light guide 2. The concave portion includes a conical surface inclined toward the center and a concave surface in the center portion. An annular protrusion 113 is formed on the outer periphery of the upper surface of the light guide 2. With these configurations, the entire flat portion 31 of the button 3 can be reliably irradiated without spreading the light from the LED to the surroundings. In addition, the protrusions 110 formed in the light guide 2 may adopt the structure shown in FIGS. 5A and 5B.

In the above embodiment, two protrusions 101, 102 and 111, and 112 are used to configure the protrusion 100 and the protrusion 110, but as shown in FIG. 13, one button (only protrusion 101) may be provided on the button 3 side. ), as shown in FIG. 14, one may be provided on the base 1 side (only the protrusion 111). In addition, the number of protrusions may be three or more. In addition, protrusions may be formed on both the button 3 side and the base 1 side, or may be formed on only one of them. In addition, the number of protrusions can be changed on the button 3 side and the base 1 side. In addition, when a plurality of protrusions are provided on the button 3 side or the base 1 side, it is preferable to make the heights of the protrusions on the respective sides different from each other. According to this, as in the aforementioned embodiment, not only the urging force of the coil spring 4 is distributed to both sides of the protrusions, but also between the protrusions. Therefore, the vibration of the coil spring 4 can be further effectively attenuated.

In the above embodiment, the protrusion 110 is formed on the light guide 2 of the base 1, but it may be formed on the bottom 8 of the base 1.

In the above embodiment, the protrusion 100 is provided on the button 3 and the protrusion 110 is provided on the base 1 side. However, as shown in FIG. 15, the protrusion 120 may be provided on the coil spring 4. Here, the first protrusion 121 and the second protrusion 122 are respectively formed at positions separated by 180° with respect to the central axis at the upper end of the coil spring 4. However, it is difficult to process the protrusions on the coil spring 4 itself, so the attachment with protrusions may be separately attached to the coil spring 4. In this case, the attachment is formed of rubber or a synthetic resin material in a cylindrical shape, and it is sufficient to provide protrusions on the outer peripheral surface and press the wire material on one end side of the coil spring 4 into the cylindrical portion.

In the above, various embodiments of the present disclosure have been described in detail with reference to the drawings, and finally, various aspects of the present disclosure will be described. In addition, in the following description, as an example, reference signs are also added.

The push button switch of the first aspect of the present disclosure includes: a base 1; a button 3, which is installed in an accessible/separated manner relative to the base 1; and a coil spring 4, which is arranged between the base 1 and the button 3 , Urging the button 3 in a direction of separation from the base 1; and the protrusion 100 is disposed between the base 1 or the button 3 and the coil spring 4 so as to be relative to the base 1 or the knob 3 supports the end of the coil spring 4 in a swingable manner.

With this configuration, the protrusion 100 abuts on the end of the coil spring 4 and makes The swing can also swing the coil spring 4 in a direction other than the direction along the central axis. As a result, the elastic energy accumulated in the coil spring 4 can be consumed as quickly as possible to rapidly attenuate the vibration. That is, the vibration of the coil spring 4 can be effectively suppressed.

In the push button switch according to the second aspect of the present disclosure, the protrusion 100 includes a pair of protrusions 101 and protrusions 102 respectively provided at positions facing the central axis of the coil spring 4.

With this configuration, the end of the coil spring 4 can be abutted against the first protrusion 101 and the second protrusion 102 to swing it reliably, and therefore, the vibration of the coil spring 4 can be further effectively suppressed.

In the push switch of the third aspect of the present disclosure, the height of the protrusion 100 is larger than the strand diameter of the coil spring 4.

With this configuration, the protruding portion 100 can be reliably abutted on an arbitrary position of one end portion of the coil spring 4.

In the push button switch of the fourth aspect of the present disclosure, the protrusion 100 is provided on the knob 3 between the knob 3 and the coil spring 4.

With this configuration, the protrusion 100 can be simply provided without increasing the number of parts.

In the push switch of the fifth aspect of the present disclosure, the protrusion 100 is provided on the base 1 between the base 1 and the coil spring 4.

With this configuration, it is possible to simply provide the protrusion without increasing the number of parts 100.

In the push switch of the sixth aspect of the present disclosure, the protrusion 100 includes a protrusion 101, a protrusion 102 provided between the knob 3 and the coil spring 4, and a protrusion provided on the base 1 and the coil spring The protrusion 111 and the protrusion 112 between 4 are located around the central axis of the coil spring 4, and the positions of the protrusion 101, the protrusion 102, the protrusion 111, and the protrusion 112 are different from each other.

With this configuration, the swing direction of the end of the coil spring 4 can be different on the button 3 side and the base 1 side, and the chattering of the coil spring 4 can be further effectively suppressed.

In the push switch of the seventh aspect of the present disclosure, the protrusion 100 is provided on the coil spring 4.

In the push switch of the eighth aspect of the present disclosure, the protrusion 100 includes a plurality of protrusions 101, protrusions 102, protrusions 111, protrusions 112, and the heights of the protrusions 101, protrusions 102, protrusions 111, protrusions 112 are respectively The strand diameter of the coil spring 4 is larger and different from each other.

With this configuration, the end of the coil spring 4 abuts on the plurality of protrusions 101, 102, 111, and 112 having different heights, whereby the coil spring 4 can be rocked reliably. Therefore, the elastic energy accumulated in the coil spring 4 can be captured as quickly as possible to damp the vibration.

In the push button switch of the ninth aspect of the present disclosure, the coil spring 4 is disposed outside the light guide member 2 provided between the knob 3 and the base 1.

With this configuration, only the light guide can be provided in the area where the light from the light source transmits The member 2 can suppress the vibration without hindering the light guide effect.

In addition, each of the various embodiments or modification examples described above can be appropriately combined to achieve the effects possessed by them. In addition, a combination of embodiments, a combination of embodiments, or a combination of embodiments and embodiments may be performed, and a combination of features in different embodiments or embodiments may also be performed.

This disclosure fully describes the preferred embodiments while referring to the accompanying drawings, but various modifications and corrections are obvious to those skilled in the art. Such variations or amendments should be interpreted as long as they do not deviate from the scope of the present disclosure defined by the scope of the attached patent application, they are also included in the scope of the present disclosure.

[Industry availability]

The button switch of the present disclosure can be used for a keyboard and the like.

1‧‧‧Matrix

3‧‧‧ button

7‧‧‧ Lifting mechanism

Claims (9)

A push button switch, comprising: a base; a button, which is installed in an approachable/detachable manner with respect to the base; a coil spring, which is arranged between the base and the button, and is opposite to the base with respect to the button Urging force in the direction of separation; and the protruding portion, arranged between the base or the button and the coil spring, so that the coil spring relative to the base or the button is along the center of the coil spring The end of the coil spring is supported so as to be swingable in a direction other than the direction of the shaft. The push button switch as described in item 1 of the patent application range, wherein the protrusions include a pair of protrusions respectively provided at positions opposed to the central axis of the coil spring. The push button switch as described in item 1 or 2 of the patent application, wherein the height of the protrusion is larger than the diameter of the coil spring. The button switch according to the first or second item of the patent application scope, wherein the protrusion is provided on the button between the button and the coil spring. The push button switch as described in item 1 or item 2 of the patent application range, wherein the protrusion is provided on the base between the base and the coil spring. The push button switch according to item 1 or item 2 of the patent application range, wherein the protrusion includes a protrusion provided between the button and the coil spring, and a protrusion provided between the base body and the coil spring Of the protrusion in the center of the coil spring Around the shaft, the positions of the protrusions are different from each other. The push button switch as described in item 1 or item 2 of the patent application scope, wherein the protrusion is provided on the coil spring. The push button switch according to item 1 or item 2 of the patent application range, wherein the protrusion portion includes a plurality of protrusions, and the heights of the plurality of protrusions are respectively greater than the strand diameter of the coil spring and are different from each other. The push button switch according to item 1 or item 2 of the patent application range, wherein the coil spring is arranged outside the light guide member provided between the button and the base.

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