JP4826414B2 - Push button switch - Google Patents

Description

  The present invention relates to a push button switch, and more particularly to a push button switch incorporating a plurality of light sources.

Conventionally, as a push button switch, for example, an engraving plate 2 that also serves as a diffusion plate is disposed immediately below the color cap 1 and a light emitting diode assembly 3 is disposed below the engraving plate 2 (patent). Reference 1).
Japanese Utility Model Publication No. 4-112421

  However, in the above-described push button switch, the light emitting diode assembly 3 that is a light source is located immediately above the diffusion plate 2, and the distance between the light source and the color cap 1 is short, so that the light cannot be sufficiently diffused. For this reason, only the vicinity around the light source is bright, and the illumination surface of the color cap 1 does not shine uniformly. In addition, when a plurality of light sources are arranged with different hues, there is a problem that light with different hues is not sufficiently mixed, and it is difficult to obtain a beautiful color.

  In view of the above-mentioned problems, the present invention has a uniform light on the illumination surface and the position of the light source cannot be visually recognized. It is an object to provide a push button switch that can be released.

In order to solve the above problems, the push button switch according to the present invention has a planar rectangular light diffusing plate disposed immediately below an operation cap that moves up and down by a pressing operation, and a light source is provided below the light diffusing plate. a push button switch is arranged on the lower surface of the light diffusion plate, Rutotomoni provided a recess emanating from the operation cap collected light from a light source evenly spread, the entire lower surface of the light diffusion plate, A large number of quadrangular pyramid-shaped concave portions are provided in a grid pattern at a predetermined pitch .

  According to the present invention, the light from the light source is collected in the recess of the light diffusing plate, uniformly diffused and emitted from the upper surface of the operation cap, so that the upper surface of the operation cap shines evenly. Further, even when a plurality of light sources having different hues are arranged, the light is sufficiently mixed and becomes one color. For this reason, not only two-color light emission but also three-color light emission is possible.

The recess includes a cone, a truncated pyramid, and a truncated cone in addition to a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid, and the like.
In addition, according to the present invention , the light of the light source, in particular, the light emitted from a plurality of light sources having different hues can be mixed more effectively, so that a push button switch that emits beautiful light can be obtained. is there.

Embodiments according to the present invention will be described with reference to the accompanying drawings of FIGS.
As shown in FIGS. 1 to 6, the push button switch according to the first embodiment is generally composed of a base 10, a base cover 20, a push button 30, a light diffusion plate 40, and an operation cap 50. Has been.

  The base 10 is a flat rectangular resin molded product having a circular recess 11 at the center of the upper surface, and as shown in FIG. 4, a common fixed contact 12 is provided at the center of the bottom of the recess 11, and A pair of fixed contacts 13, 13 are insert-molded with the common fixed contact 12 in between. Further, the base 10 is provided with positioning protrusions 15 provided with engaging protrusions 14 at the upper corners. Further, the base 10 has a common fixed contact terminal 12a and fixed contact terminals 13a and 13a projecting from opposite outer surfaces, and is bent downward.

  In the recess 11 of the base 10, a movable contact 17 made of a dome-shaped reversing spring, a disk-shaped insulating sheet 18 that can cover the movable contact 17, and an outer peripheral edge of the disk-shaped insulating sheet 18 are removed. The retaining ring 19 to be stopped is sequentially stacked.

  The base cover 20 has a flat rectangular box shape that can cover the base 10. An operation hole 21 is provided at the center of the bottom surface of the base cover 20, and a positioning recess 22 is formed between the operation holes 21. . Furthermore, the base cover 20 has guide holes 23 formed at the bottom corners thereof, and a pair of engagement holes 24, 24 provided on opposite side walls. When the base cover 20 is fitted to the base 10, the engagement protrusion 14 of the base 10 is engaged with the inner peripheral surface of the base cover 20 and assembled.

  In the positioning recess 22 of the base cover 20, LEDs 28 and 29, which are light sources having terminals 28a and 29a, are positioned. As a result, the terminals 28 a and 29 a protrude from the lower surface of the base 10.

  The push button 30 has a box shape having a planar shape that can be fitted into the base cover 20, and the inner peripheral surface and the bottom surface of the push button 30 reflect the light of the LEDs 28 and 29 to a light diffusion plate 40 described later. ing. The push button 30 has guide protrusions 31 that can be slid into the guide holes 23 of the base cover 20 at the bottom corners thereof. A pair of elastic protrusions 32 and 32 and a locking claw portion 33 are provided on the outer side surface of the opposing side wall of the push button 30. Further, as shown in FIGS. 1 and 2, the push button 30 has an operation button portion 34 protruding from the center of the lower surface thereof, and upper end portions of the LEDs 28 and 29 on both sides of the operation button portion 34. Through-holes 35, 35 through which are exposed are provided. Further, the push button 30 is formed with a positioning annular step 36 at the opening edge thereof.

  The guide protrusion 31 of the push button 30 is inserted into the guide hole 23 of the base cover 20, and the elastic protrusions 32, 32 are engaged with the engagement holes 24, 24 of the base cover 20 to be prevented from coming off.

  The light diffusing plate 40 is a resin molded product that includes a rib 41 that is made of a light transmissive material containing a light diffusing agent and has a planar shape that can be fitted to the positioning annular step 36 of the push button 40. As shown in FIGS. 5 and 6, the light diffusing plate 40 has substantially square pyramid concave portions 43a arranged in a lattice shape on the lower surface of the light diffusing portion 42 protruding from the lower surface of the rib 41, and A mortar-shaped recess 43 is formed at the center. Then, the light diffusing plate 40 is fitted to the annular step 36 of the push button 30 and positioned.

  According to the present embodiment, the mortar-shaped recess 43 of the light diffusing unit 42 collects the light emitted from the LEDs 28 and 29 and diffuses it uniformly. In particular, since the concave portions 43a are arranged in a lattice pattern on the lower surface of the light diffusion portion 42, the light is more diffusely reflected. For this reason, there is an advantage that the light diffuses uniformly and is sufficiently mixed so that even a light source having a plurality of hues appears to be a single color.

  The operation cap 50 covers the push button 30 and has a box shape that can be fitted, and a locking hole 51 is formed on the opposite side surface. Then, the operation cap 50 is fitted to the push button 30, and the locking hole 51 is locked to the locking claw portion 33 of the push button 30 to prevent it from coming off.

  Accordingly, as shown in FIGS. 1 and 2, when the operation cap 50 is pushed down, the push button 30 is lowered together with the light diffusion plate 40, and the operation button portion 34 is located at the center of the movable contact 17 via the insulating sheet 18. Press the part down. When the central portion of the movable contact spring 17 is lowered to a predetermined position, the movable contact spring 17 is instantaneously reversed and the common fixed contact 12 and the fixed contacts 13 and 13 are brought into conduction. As a result, the two LEDs 28 and 29 are turned on to emit light. The emitted light is collected in the mortar-shaped recess 43 of the light diffusing plate 40 and mixed while being irregularly reflected by the diamond cut surface, and is transmitted to the outside through the operation cap 50.

  According to the present embodiment, the light emitted from the two LEDs 28 and 29 mixes in the recess 43 of the light diffusion plate 40 and is diffusely reflected, thereby emitting uniform light to the outside. For this reason, the position of the LEDs 28 and 29 cannot be visually recognized, and there is an advantage that even if the LEDs 28 and 29 having different hues are turned on, the colors appear as one color.

  The recess 43 of the light diffusing plate 40 does not necessarily need to be diamond-cut, and as shown in FIG. 7, a mortar-shaped recess 43 may be formed in the light diffusing portion 42 of the light diffusing plate 40 (second embodiment). Form).

  Further, the recess 43 in the light diffusion portion 42 of the light diffusing plate 40 may have a simple conical shape as shown in FIG. 8 (third embodiment), and further, as shown in FIG. 43 may have a shape in which a plurality of frustoconical surfaces having different diameters are stacked (fourth embodiment), or may be a pot-bottom-shaped recess 43 as shown in FIG. 10 (fifth embodiment). Next, as shown in FIG. 11, the recess 43 of the light diffusing plate 40 may have a truncated cone shape (sixth embodiment). Of course, if necessary, the surface of the recess 43 may be diamond-cut as in the first embodiment.

  In the above-described embodiment, the case where the present invention is applied to a push button switch including two LEDs 28 and 29 has been described. However, the present invention is not limited to this, and it goes without saying that one or three or more light sources may be incorporated. is there.

  The push button switch according to the present invention is not limited to the push button switch described above, and may be applied to other push button switches.

It is sectional drawing which shows embodiment of the pushbutton switch concerning this invention. It is a cross-sectional perspective view of the pushbutton switch shown in FIG. It is a disassembled perspective view of the pushbutton switch shown in FIG. FIG. 2 is an enlarged plan view of the base shown in FIG. 1. FIGS. A, B, and C are a front view, a bottom view, and a cross-sectional view taken along line CC in FIG. B of the light diffusing plate shown in FIG. FIGS. A and B are the perspective view and the cross-sectional perspective view shown in FIG. FIGS. A, B, and C are a perspective view, a bottom view, and a cross-sectional view taken along the line CC of FIG. B, showing a light diffusing plate according to a second embodiment. FIGS. A, B, and C are a perspective view, a bottom view, and a cross-sectional view taken along line CC of FIG. B, showing a light diffusing plate according to a third embodiment. FIGS. A, B, and C are a perspective view, a bottom view, and a cross-sectional view taken along the line CC of FIG. B, showing a light diffusing plate according to a fourth embodiment. FIGS. A, B, and C are a perspective view, a bottom view, and a cross-sectional view taken along line CC of FIG. B, showing a light diffusing plate according to a fifth embodiment. FIGS. A, B, and C are a perspective view, a bottom view, and a cross-sectional view taken along the line CC of FIG. B, showing a light diffusing plate according to a sixth embodiment.

28, 29: LED
30: Push button 40: Light diffusion plate 41: Rib 42: Light diffusion part 43: Recess 43a: Recess 50: Cap for operation

Claims (1)

A push button switch in which a planar rectangular light diffusing plate is disposed immediately below an operation cap that moves up and down by a pressing operation, and a light source is disposed below the light diffusing plate,
Given the lower surface of the light diffusion plate, Rutotomoni provided a recess emanating from the operation cap collected light from a light source evenly spread, the entire lower surface of the light diffusion plate, a recess of a large number of quadrangular pyramid A push button switch characterized by being provided in a grid pattern at a pitch of .

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