JPH11250763A - Switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operativity and to improve assembly by integrally forming a restoring spring for biasing a push button toward the front side of a cover with the cover. SOLUTION: A restoring spring 13 is projectingly formed by the integral molding with a cover 10, its root is positioned in the further back side than an opening edge of an opening part 12 of the cover 10, the restoring spring 13 is projected to the central side of the cover 10 from the opening edge side, and its edge is formed into a spiral shape. When the central part of the push button 30 is depressed, four abutment projections of the push button 30 uniformly pressurizes against the four restoring springs 13 so as to provide superior depressing operation feeling. When the end of the push button 30 is pressurized, the push button 30 is advanced in a slightly inclined state and an locking means 34 of the push button 30 positioned apart from the pressurized edge part butts against the opening edge so as to prevent the push button 30 from being inclined. An approximately equal load is applied on each restoring spring 13 so as to become an appropriate repulsive force and the superior depressing operation feeling can be also provided in this case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is to be installed on a wall or the like,
The present invention relates to a switch for operating a light, a ventilation fan, and the like.

[0002]

2. Description of the Related Art Conventionally, switches that are installed on a wall or the like to perform operations such as turning on and off an electric light and driving operations of a ventilation fan and the like include:
11 and 12 are shown. These switches are configured such that a switch body disposed on a printed circuit board or the like inside the switch is pressed by a push button 30.

The switch shown in FIG. 11 has a small push button 30 for operation and a timer setting section 40, and has a position indicator light 60 in the push button 30. The position is known. The push button 30 is a push type push button.

The switch shown in FIG. 12 includes a large push button 30 for operation, and an indicator light 61 on the left side of the push button 30 which also serves as a position indicator (green) and a load operation indicator (red). Have.

[0005]

However, the switch shown in FIG. 11 is a push button 30 about the size of the tip of an adult's thumb, and the push button 30 of the operation unit is small, so that it is difficult to operate the switch. In the case of having the large push button 30 shown in FIG. 12, although the operation area of the push button is large, it is difficult to operate in the dark because the indicator light 61 for displaying the operation position does not match the operation position. There was a problem. In addition, since the body and the cover are assembled and assembled using the metal fittings 41 to be attached to the mounting frame or using assembly parts such as screws, the assemblability was not good.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a switch which is particularly excellent in operability and has good assemblability.

[0007]

According to a first aspect of the present invention, there is provided a cover forming a housing, and a switch disposed at an opening of the cover and positioned inside the cover. A switch having a push button for pressing the body, wherein a return spring for urging the push button toward the front side of the cover is formed integrally with the cover.

According to the second aspect of the present invention, the cover is formed in a spiral shape protruding from the cover. In the invention according to claim 3, the push button and the opening are formed in a quadrangular shape, and the return springs are respectively provided at four corners of the opening of the cover, and a stopper of the push button is formed on the center side of the opening, The push button has a pressing portion for pressing the switch body on the rear side thereof, contact portions of the push button corresponding to the return spring at four corners of the push button, contact portions to the stopper, and a cover. And locking means for preventing falling off.

According to the fourth aspect of the present invention, the operation surface of the push button is approximately equal to or slightly larger than the area of the adult's thumb beyond the first joint.

According to the fifth aspect of the present invention, the indicator lamp is housed by forming a holding portion on the back side of the push button.

In the invention according to claim 6, the body and the cover are assembled by engaging with the engaging means formed on the body and the cover.

In the invention according to claim 7, the connection of the terminal portion is of a quick connection terminal type having a terminal plate and a chain spring for holding and fixing the electric wire between the terminal plate and the terminal plate.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to FIGS. 1 is a sectional view of the switch, FIG. 2 is an exploded perspective view of the switch, FIG. 3 is a front view showing a cover and a push button, which are main parts of the same, and FIG. 4 shows a cover and a push button, which are main parts of the same. Rear view, FIG. 5 is a sectional view of the push button, FIG. 6 is a view showing an assembled state of the cover and the body,
(A) is a side view, (b) is an enlarged view of a main part, FIG. 7 is a front view of a switch mounted on a plate, FIG. 8 is an exploded perspective view showing a state of being mounted on a wall, and FIG. 9 is an example of an internal circuit of the switch. FIG. 10 is a diagram showing another example of the internal circuit of the switch.

As shown in FIG. 1, the switch of this embodiment has a body 1 and a cover 2 formed of a synthetic resin molded product as a housing. As shown in FIGS. 1 and 2, the body 1 is formed in a box shape with one side open, and a terminal housing portion 1b formed by partitioning by a partition wall 1a is formed therein. In the terminal housing portion 1b, there are provided terminal plates 3 and 3, locking springs 4 and 4 constituting a quick-connecting terminal between the terminal plates 3 and 3, and a release used for removing an electric wire from the quick-connect terminal. The button 5 is stored. Further, in the body 1, a printed board 7 is disposed in a receiving portion 1c formed in the body 1. When arranging the printed circuit board 7,
The tip 3 of the terminal plates 3 already housed in the body 1
a, 3a are inserted into the connection holes 7a, 7a of the printed circuit board 7. The tip portions 3a, 3a of the terminal plates 3, 3 are conductively connected to the printed circuit board 7 by soldering. Note that the terminal boards 3 and 3 and the lead wires of a neon lamp 60 described later are conductively connected to the printed board 7 first, and then the printed board 7 is connected.
May be incorporated in the body 1. A circuit pattern and electronic components required as an internal circuit of the switch are mounted on the printed board 7. A tact switch 6 as a switch body is connected and arranged on the front side of the substantially central portion of the printed circuit board 7. The tact switch 6 is a push-on type switch.

Next, the cover 10 is attached to the body 1 by the structure shown in FIGS. 6 (a), 6 (b) and FIG. That is, the engaging projections 8 are formed on the outer wall of the body 1, and the four engaging projections 8 are combined on both sides of the body 1.
Is formed. On the other hand, four engagement holes 11 are formed in the cover 10 corresponding to the engagement projections 8. The cover 10 can be easily attached to the body 1 by attaching the engagement projections 8 to the engagement holes 11.

Next, the cover 10 will be described. As shown in FIG. 2, the cover 10 has a rectangular opening 12 at a central portion for housing a part of the height of the push button 30. A push button 30 is provided in the opening 12. Four return springs 13 are provided at the four corners of the opening 12, respectively. This return spring 13 is shown in FIGS.
As shown in (1), the cover 10 is formed integrally with the cover 10 so as to protrude therefrom, and its base is located further back than the opening edge 12a of the cover 10. The return spring 13 protrudes from the opening edge 12a side of the opening 12 toward the center of the cover 10, and has a tip wound in a spiral shape. The four return springs 13 are formed independently of each other, and are each independently subjected to the operation load of the push button 30. The repulsion force of the return spring 13 can be adjusted by changing the material, the number of turns, the length of the spiral part, the sectional area, and the like.

Further, a stopper 14 for pressing the push button 30 is formed in the opening 12, and the stopper 14 is integrally supported by a support 15 from an opening edge 12 a of the opening 12, and Is formed in an annular shape near the center. The stopper 14 prevents the back surface of the push button 30 from abutting on the push button 30 to prevent the push button 30 from being pushed too much. The support 15 also has a stopper function for the push button 30. A small hole 16 is formed at the center of the stopper 14, and the tact switch 6 is located below the small hole 16.
By operating the push button 30, the tact switch 6 can be pressed.

The cover 10 is formed with eight engaging projections 20 protruding outward, and the cover 10 is attached to the plate frame 50 (see FIG. 8). The four engagement holes 21 are provided for mounting to different types of plate frames, not shown.

Next, the push button 30 will be described with reference to FIGS. 1, 2 and 5. The push button 30 is formed in a box shape having an opening on the back side, and is formed to have a vertical and horizontal dimension of about 29 mm × about 23 mm as shown in FIG. Further, a circular opening 35 is formed at the center of the front surface. FIG.
At the four corners on the rear side of the push button 30 as shown in FIG.
A contact projection 31 is formed at a position corresponding to the return spring 13 so as to project in an L-shaped cross section. As shown in FIG. 5, a holding portion 32 for holding a neon lamp 60 as a position indicating lamp is formed integrally with the push button 30 at the center of the back surface of the push button 30. A projection (pressing portion) 33 that directly contacts the tact switch 6 when the push button 30 is pressed is formed in the center of the rear surface of the holding portion 32. As shown in FIG. 5, the circular opening 35 is located on the front side of the holding portion 32, and a translucent lamp cover 38 for closing the opening 35 is mounted. Lamp cover 38
Since the light is translucent, the neon lamp 60 can be made invisible when the light is turned off, and when the light is turned on, for example, emission of red light can be sufficiently confirmed. The neon lamp 60 mounted between the holding portion 32 and the lamp cover 38
Are connected portions 3a, 3a of the terminal plates 3, 3, as shown in FIG.
From the lead through the adjustment resistor R ₁ ,
It is mounted on the holding part 32. Further, as shown in FIGS. 2 and 4, four locking pieces 34 are formed on the outer wall of the push button 30 so as to protrude, and are respectively locked to the opening edges 12 a on the back side of the opening 12 of the cover 10. You. By this locking, the push button 30 does not fall off in the front direction of the cover 10.

The order of assembling the switches described above will be described. First, the locking springs 4 and 4, the release button 5, and the terminal plates 3 and 3 are housed in the body 1, and the terminal plates 3 and 3 are mounted on the terminal holes 7 a and 7 a of the printed circuit board 7 having the tact switch 6. Then, the printed circuit board 7 is disposed on the body 1. Lead wire of neon lamp 60, terminal plates 3, 3 and terminal hole 7
a and 7a are conductively connected. The neon lamp 60 is inserted through the opening 12 of the cover 10 to the front and attached to the holding portion 32 of the push button 30. Then, the push button 30 is attached to the cover 10, and the cover 10 is attached to the body 1. As described above, the assembly of the cover 10 and the body 1 is simple, and the locking springs 4, 4, the release button 5, the terminal plates 3, 3
Is easy to store. Further, the push button 30 can be easily attached to the cover 10.

Next, the feeling of pressing the push button 30 will be described. First, when the central portion of the push button 30 is pressed, the push button 30 moves forward without tilting in the rear direction. Therefore, the four contact projections 31 of the push button 30 press the four return springs 13 evenly, provide an appropriate repulsion force, and obtain a good pressing operation feeling.

When the end of the push button 30 is pressed, the push button 30 moves forward while slightly tilting, but the locking piece 34 of the push button 30 located at a position away from the pressed end.
However, since the push button 30 is prevented from leaning against the opening edge 12a, the weight is substantially equally applied to each return spring 13,
Appropriate repulsion is obtained, and also in this case, a good pressing operation feeling can be obtained.

Therefore, in the push button 30 having a relatively large operation section, a good pressing operation feeling can be obtained even if the center of the operation section or the end section is pressed.

Next, the attachment to a wall or the like will be described with reference to FIGS. The switch is mounted on a square plate frame 50 having a vertical and horizontal side of 86 mm x 86 mm. This plate frame 50 conforms to the GB series 86 series adopted in China. Plate frame 5
0 has a square opening 51 in the center,
Corresponds to the shape of the cover 10. This opening 5
Although not shown, eight engagement holes corresponding to the eight engagement projections 20 of the cover 10 are formed on the inner wall of the cover 1. The engagement protrusion 20 is engaged with the engagement hole, and the switch is mounted on the plate frame 50. The plate frame 50 has four openings 52 for attaching the plate 70, and a projection (not shown) on the back surface of the plate 70.
Are inserted and engaged. Further, the plate frame 50 is formed with an elongated hole 53 through which two screws are inserted, and is screwed to the box 80 with two box screws 54. The distance between the long holes 53 is set to 60 mm between the centers so as to conform to the standard. The escape hole 55 of the plate frame 50 has a resilient force on the plate frame 50, thereby facilitating the mounting and removing of the switch. The holes 56 are formed for inserting a screwdriver or the like to remove the switch.

Next, an internal circuit when this switch is applied to a temporary lighting switch will be described with reference to FIGS. 9 and 10, the commercial AC power supply AC
Is connected to a load L such as a lighting, and a switch terminal T
_1, is connected to the internal circuitry of the switch via a T _2. FIG. 9 is a circuit of a capacitor charging system, and its operation will be described.

Operation 1. Pressing the operation switch SW, will the contacts and closed, the potential across the capacitor C ₂ is about 0
V, and the transistor Q ₂ is turned off.

Operation 2. A base current is supplied through the resistor R ₄ to the transistor Q _1, the transistor Q ₁ is turned on.

Operation 3. Gate current is supplied through the resistor R ₃ to the gate of the thyristor SCR, thyristor SCR
Is turned on.

Operation 4. Load current is diode bridge D
The load supplied via B and the thyristor SCR turns on.

Operation 5. The charge in the capacitor C ₂ by the potential across the diode bridge DB from the resistor R ₅ through the diode D between until thyristor SCR is turned on in each half-wave is charged.

Operation 6. Transistor Q ₁ for base is not supplied transistor Q ₁ when the potential of both ends of the capacitor C ₂ reaches a potential that can transistors Q ₂ to the ON state through the Zener diode ZD, the load becomes thyristor SCR and the OFF state Turns off.

In this circuit, a resistor R _{5, a} capacitor C ₂ ,
By changing the turn-off time of the Zener diode ZD and the thyristor SCR, it is possible to adjust to an arbitrary delay time.

FIG. 10 shows a circuit of the CR oscillation counting system, which has a power supply circuit section E, a load drive circuit section F, and a timer circuit section T as internal circuits of the switch. The operation will be described below.

Operation 1. When the contacts are closed by pressing the operation switch SW, the operation of a diode D ₆ switch SW
The base current of the transistor Q ₂ flows through the transistor Q ₂ is the transistor Q ₁ the base current of the transistor Q ₁ is flowing through the resistor R ₄ becomes off-state is turned on, gate current to the gate of the thyristor SCR , The thyristor SCR is turned on, and the diode D
The load current is supplied from B through the thyristor SCR.

Operation 2. When the operation switch SW is released and the contact changes from a closed circuit to an open circuit, the potential of the SET terminal of the IC becomes L.
From o to Hi, oscillation starts in OSCs 1 to 3, and V _OUT changes from Hi to Lo output. The number of oscillations is measured by a counter connected to OSC3 inside the IC, and when the number of oscillations reaches a specified number, V _OUT is changed from Lo to Hi.
And the load goes off.

In this circuit, an arbitrary delay time can be set by changing the oscillation frequency by adjusting the constants of the resistors R ₆ and R ₇ and the capacitor C ₂ .

[0037]

According to the first aspect of the present invention, since the return spring of the push button is formed integrally with the cover, there is no need to incorporate a separate return spring, and the effect of improving the assemblability is achieved.

According to the second aspect of the invention, in addition to the effect of the first aspect, since the return spring is formed in a spiral shape protruding from the cover, the repulsive force thereof can be easily adjusted. There is an effect that a good pressing operation feeling can be obtained.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, even with a push button having a relatively large operation surface, the push button is provided over substantially the entire operation surface. This provides an effect that a good pressing operation feeling can be obtained.

According to the fourth aspect of the present invention, in addition to the effect of the third aspect of the present invention, the operation surface of the push button is set to be approximately the same as or slightly larger than the area of the adult's thumb beyond the first joint. Therefore, there is an effect that the operation can be easily performed even by the elderly or the like, and the operation can be performed even on a part other than the finger.

According to the fifth aspect of the present invention, in addition to the effect of the first aspect, the indicator light can be disposed immediately below the substantially central portion of the operation surface of the push button, and the indicator light can be provided even in darkness or the like. It is sufficient to operate at or near the position of, and there is an effect that the operability is excellent.

According to the sixth aspect of the invention, in addition to the effect of the first aspect, there is an effect that no trouble is required in assembling the body and the cover.

According to the seventh aspect of the invention, in addition to the effect of the first aspect, since the quick connection terminal system is used, connection to the switch is easy, and incomplete connection due to insufficient screw tightening in the conventional system. The effect that it can prevent is produced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a switch according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the switch.

FIG. 3 is a front view showing a cover and a push button, which are main parts of the above.

FIG. 4 is a rear view showing a cover and a push button, which are main parts of the above.

FIG. 5 is a cross-sectional view of the push button.

FIGS. 6A and 6B are views showing an assembled state of the cover and the body, in which FIG. 6A is a side view and FIG. 6B is an enlarged view of a main part.

FIG. 7 is a front view of the switch attached to the plate.

FIG. 8 is an exploded perspective view showing a state where the switch is attached to a wall surface.

FIG. 9 is a diagram showing an example of an internal circuit of the switch of the above.

FIG. 10 is a diagram showing another example of the internal circuit of the switch of the above.

FIG. 11 is a perspective view of a conventional switch.

FIG. 12 is a front view of another conventional switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 3 Terminal board 4 Lock spring 6 Switch body (tact switch) 8 Engagement means (engagement projection) 10 Cover 11 Engagement means (engagement hole) 12 Opening 13 Return spring 14 Stopper 30 Push button 31 Return spring Abutting portion 32 abutting portion to holding portion and stopper 33 pressing portion (projection) 34 locking means 60 indicator lamp (neon lamp)

Claims (7)

[Claims] 1. A switch comprising: a cover constituting a housing; and a push button disposed at an opening of the cover and configured to press a switch body located inside the cover, the switch comprising:
A switch, wherein a return spring for urging a push button toward the front side of the cover is formed integrally with the cover. 2. The switch according to claim 1, wherein the return spring is formed in a spiral shape protruding from the cover. 3. The push button and the opening are formed in a square,
And the return spring is disposed at each of the four corners of the opening of the cover, a stopper of a push button is formed at the center of the opening, and the push button has a pressing portion for pressing a switch body on the back side thereof, A contact portion with the return spring, a contact portion with the stopper, and locking means for preventing the push button from falling off the cover are formed at the four corners of the push button corresponding to the return spring. The switch according to 1 or 2. 4. An operation surface of the push button is set to a first thumb of an adult.
4. The switch according to claim 3, wherein the area is equal to or slightly larger than the area before the joint. 5. The switch according to claim 1, wherein a holding portion is formed on the back side of the push button to house the indicator light. 6. The switch according to claim 1, wherein the body and the cover are assembled by engaging with each other by engaging means formed on the body and the cover. 7. The switch according to claim 1, wherein the connection of the terminal portion is of a quick connection terminal type having a terminal plate and a chain spring for holding and fixing the electric wire between the terminal plate and the terminal plate. .