JP3175970B2 - Timer switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to two loads which are connected to each other, and turn on both loads at the same time during the ON operation, and turn off one load instantly and the other load after a certain time during the OFF operation. The present invention relates to a timer switch adapted to perform such operations.

[0002]

2. Description of the Related Art Conventionally, for example, as a timer switch for turning on and off a lighting load for illuminating a toilet and a ventilation fan for ventilating the toilet, both loads are simultaneously turned on at the time of an on operation, and at the time of an off operation. There is known a timer switch for turning off one load instantaneously and turning off the other load after a predetermined time. That is, when entering the toilet, the lighting load and the ventilation fan are simultaneously turned on by the ON operation, and when leaving the toilet, the ventilation fan is operated for a certain period of time after the lighting load is turned off by the OFF operation.

[0003]

However, this type of timer switch is of a push button type, and has a problem that the appearance and operability are not very good. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a timer switch having good appearance and operability.

[0004]

According to the present invention, in order to achieve the above object, a first contact inserted between a power supply and a first load and a first contact between the power supply and the second load are provided. A second contact inserted, a current detection circuit for detecting at least a load current to the second load; a switching element connected in parallel to a series circuit of the second contact and the current detection circuit; When the load current to the second load is detected by the current detection circuit as the contact of the switch turns on, the switching element is turned on, and the load current to the second load is changed by the current detection circuit as the second contact is turned off. Is not detected, a timed operation is started and a switching circuit is turned off after a lapse of a predetermined time, and a delay circuit for turning on / off the first and second contacts in conjunction with each other.
A push button switch device to be turned off and a piano handle for pressing a push button handle of the push button switch mechanism by a piano touch operation are provided.

[0005] The present invention is applicable when the first load is a lighting load for illuminating the toilet and the second load is a ventilation fan for ventilating the toilet.

[0006]

According to the structure of the present invention, it can be turned on and off by a piano touch operation, so that the appearance and operability are improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following embodiment, a case will be described in which a lighting load for illuminating a toilet and a ventilation fan for ventilating the toilet are used as loads. However, the type of load is not necessarily limited to this. If the load to be turned off instantaneously and the load to be turned off after a certain period of time are simultaneously operated, the technical idea of the present invention can be applied.

FIG. 10 shows a circuit according to an embodiment of the present invention. This circuit comprises a first contact S ₁ is opened and closed in one operation unit and the second contact S _2. That is, the first contact S ₁
The second of the contact S ₂ is turned on and off in conjunction. First contact S ₁ is connected in series to the primary side of the current transformer CT which constitute the current detection circuit 1, is connected the between the series circuit load connection terminals L ₁ of the power source terminal E and the first . The second contact S ₂ are connected in series to the primary side of the current transformer CT, the series circuit is connected between the load connection terminal L ₂ of the power supply terminal E and the second. Also, the series circuit of the primary side of the second contact S ₂ and current transformer CT, a series circuit of the switching element Q ₁ made of choke coil L ₀ and the triac is connected in parallel. Power terminal E and between the first and the load connection terminal L ₁ connected in series circuit with the lamp load 2 and the power supply AC, ventilating fan 3 between the load connection terminal L ₂ of the power supply terminal E and a second And a power supply AC are connected in series. Therefore, if the first contact S ₁ and the second contact S ₂ are on, the lighting load 2 and the ventilation fan 3 are both on, and the first contact S ₁
And second contacts S ₂ and the switching element Q ₁ a off if it is on, only the ventilating fan 3 is turned on. First
Contacts S ₁ and second contact S ₂ and the switching element Q of
If all of ₁ are off, the lighting load 2 and the ventilation fan 3 are off.

[0009] The secondary side of the current transformer CT is connected to the delay circuit B. A delay circuit B for performing a timed operation for a fixed time after stopping the detection output on the secondary side of the current transformer CT;
The output during time limit operation of the timer circuit 5 conductive holding circuit 4 for holding the switching element Q ₁ in the ON state,
And a malfunction prevention circuit 6. The malfunction prevention circuit 6 will be described later.

[0010] The timer circuit 5 includes a diode bridge DB ₁ for rectifying an output of the secondary side of the current transformer CT. The output of the diode bridge DB ₁ is the peak value is limited by the resistor R ₂ and the Zener diode ZD, charges the capacitor C ₁ through the diode D ₁ of the reverse-current blocking. The capacitor C ₁ variable resistor VR for discharge are connected in parallel, the discharge time of the charge in the capacitor C ₁ is adjusted by adjusting the resistance value of the variable resistor VR. That is, the period of time limit operation is determined by the discharge time of the time constant circuit constituted by the capacitor C ₁ and the variable resistor VR.

The conduction holding circuit 4 includes a diode bridge D
B ₂ , thyristor Q ₂ , transistor Q ₃ , depletion type field effect transistor Q _4, etc., and the switching element Q ₁ is turned on while the charging voltage of the capacitor C ₁ is higher than a certain voltage. Hold. Series circuit of the primary side of the second contact S ₂ and current transformer CT (i.e., the series circuit of the choke coil L ₀ and the switching element Q _1, the neon lamp N is the first operation indicator of
A series circuit of E and a current limiting resistor R ₀ is connected in parallel. Therefore, when both the first contact S ₁ and the second contact S ₂ are off, that is, when the lighting load 2 and the ventilation fan 3 are both off, the ventilation fan 3 and the current limiting resistance R ₀
Current flows through the neon lamp NE through the lamp to light the lamp. When the first contact S ₁ and the second contact S ₂ are on or the switching element Q ₁ is on, that is, when the ventilation fan 3 or the lighting load 2 is on, the neon lamp NE is connected between both ends. Since a sufficient voltage is not applied, the neon lamp NE turns off. In short, neon lamp N
If E is lit, both the lighting load 2 and the ventilation fan 3 are off, and if the neon lamp NE is off, it indicates that at least one of the lighting load 2 and the ventilation fan 3 is on.

On the other hand, the second operation is performed on the secondary side of the current transformer CT.
A light emitting diode LED, which is an indicator light, is connected
The output of the LED is generated on the secondary side of the current transformer CT.
Lights up when That is, the light emitting diode LED
Is the first contact S₁And the second contact S_TwoIs on
When lit. Next, the operation of the above circuit will be described. No.
1 contact S₁And the second contact S_TwoAre both off
And the capacitor C of the timer circuit 5₁Is not charged
The depletion type field effect transistor Q
_FourIs on. Therefore, the power supply AC-diode
Bridge Bridge DB_Two-Resistance R₆-Resistance R₈-Field effect
Transistor Q_Four-Diode bridge DB_Two−Chalk
Coil L₀-Current flows through the path of-ventilation fan 3-power supply AC
It is. When a current flows through the above path, the transistor Q _Threeof
When the base potential is lowered, the transistor Q_ThreeIs off
become. Therefore, thyristor Q_TwoHas a gate current
Thyristor Q without flowing_TwoTurns off, and as a result, the switch
Ching element Q₁Gate current does not flow through the
Ching element Q ₁Is kept off.

When the first contact S ₁ and the second contact S ₂ are turned on, the power supply AC is connected to the lighting load 2 and the ventilation fan 3 to be turned on, and the current transformer CT of the current detection circuit 1 is turned on.
Current flows on the primary side of the current transformer CT, and an output is generated on the secondary side of the current transformer CT. The output turns on the light emitting diode LED, indicating that the lighting load 2 and the ventilation fan 3 are on. Also, becomes negative level gate of the field effect transistor Q ₄ is the source capacitor C ₁ at this time is charged,
Field-effect transistor Q ₄ is turned off. The drain of the field effect transistor Q ₄ are, the base of the transistor Q ₆ constituting the malfunction prevention circuit 6 is connected, when the field effect transistor Q ₄ is turned off, the transistor Q
₆ also turns off. Accordingly, turned on it takes a bias to the transistor Q _3, a thyristor Q ₂ is turned on is supplied gate current to the thyristor Q ₂ When the transistor Q ₃ is turned on. The switching element Q thyristor Q ₂ via the diode bridge DB ₂ if ON
A trigger is to _1, the switching element Q ₁ is turned on. That is, the first contact S ₁ and second contact S ₂ is if turned on, it is the switching element Q ₁ is turned on.

On the other hand, the first contact S ₁ and the second contact S
When ₂ is turned off, the lighting load 2 becomes immediately clear is cut off the power supply AC, the power AC to continue operating state is supplied through the switching element Q ₁ is the ventilation fan 3. That is, since the first contact S ₁ and the second contact S ₂ are turned off, the output on the secondary side of the current transformer CT stops, and the electric charge of the capacitor C ₁ is discharged via the variable resistor VR. Since the voltage across the capacitor C ₁ is a field effect transistor Q ₄ are to be lowered to the predetermined voltage is kept turned off,
The switching element Q ₁ is composed of a capacitor C ₁ and a variable resistor V
It is kept on only during the timed operation determined by R. When a predetermined time has elapsed since the first contact S ₁ and the second contact S ₂ were turned off and the voltage across the capacitor C ₁ became lower than a predetermined voltage, the field effect transistor Q ₄ was turned on and the transistor Q ₄ was turned on. ₃ turns off. As a result, the thyristor Q ₂ is turned off, the switching element Q
₁ is no longer triggered, AC power to ventilation fan 3
Supply is stopped.

[0015] across capacitor C ₁ emitter of the transistor Q ₅ - collector connected in parallel, by a transistor Q ₅ and a transistor Q _6, noise is superimposed so that is not charged in the capacitor C ₁ Is configured. Incidentally, the first contact S ₁ and the second operating portion of the contact S ₂ is configured as a switch of a so-called piano Rotary knob. 2 to 4 show exploded perspective views. Switching mechanism for opening and closing the first contact S ₁ and second contact S ₂ is accommodated in the device body 7 formed in the body 7a made of synthetic resin, a synthetic resin cover 7b. The body 7a and the cover 7b are joined by engaging a body engaging hole 10a provided in a body engaging leg 10 which is vertically provided on a pair of opposed side surfaces of the cover 7b with an engaging projection 9 of the body 7a.

On both side surfaces of the cover 7b, coupling claws 11a, 11b respectively corresponding to a pair of engaging holes 8c formed in the vertical pieces of both side pieces 8b, 8b of the mounting frame 8 are integrally provided. A cover 7b is provided on the back of one coupling claw 11b.
A space 12 is formed for obtaining a bending allowance, which is formed by a hole vertically penetrating the outer wall, so that the coupling claw 11b can be elastically pushed inward.

Connection terminal housings 13 and 14 are formed on both sides of the center of the body 7a. One of the connection terminal housings 13 has a power terminal plate 15 and a locking spring 1 which constitute a power terminal E.
6, a quick connection terminal comprising a release button 17 is stored, and the other connection terminal storage portion 14 has a terminal plate 18, a locking spring 19, and a second load connection terminal which constitute the _first load connection terminal L1. terminal plate 20 of the L _2, locking spring 21 is accommodated. The connection terminal housing 14 has a release button 22 common to the first load connection terminal L ₁ and the second load connection terminal L _2.
Is stored. The lower surface of the body 7a, as shown in FIG. 5, the power supply terminal E, the first load connection terminals L _1, the electric wire insertion holes 71, 72 and 73 corresponding to the second load connection terminal L ₂ is provided, A power supply terminal E, a first load connection terminal L ₁ , and a second load connection terminal L ₂ which form a quick connection terminal by inserting a core wire of an electric wire into each of the electric wire insertion holes 71, 72, 73.
The power supply AC, the lighting load 2, and the ventilation fan 3 can be electrically connected to each other.

The terminal plate 18 has an extension piece 18 a extending over the partition wall of the connection terminal storage portion 14 and extending into the central storage portion 23.
(See FIG. 4), and the extension piece 18a has a fixed contact 27a.
Is provided. The terminal plate 20 is connected to the connection terminal housing 14.
Extension piece 2 extending from the opening of the partition wall into the central storage portion 23
0a, and a fixed contact 27b is provided at the tip of the extension piece 20a.

The power supply terminal plate 15 is electrically connected to the central storage portion 23.
The support plate 25 which is electrically connected is disposed, and
Is provided with a mover A. The mover A is formed by a conductive plate
And is housed in the central storage section 23,
The V-shaped recess 23a provided on the side wall of the central storage portion 23 (see FIG. 7)
) And the lower edge is in contact with the support plate 25
In this state, it turns around the lower part of the V-shaped recess 23a.
ing. Protruding upward on both sides of the upper end of mover A
A movable contact 29 is provided on each of the front and back surfaces of a certain protruding piece.
The movable contact 29 is fixed to the fixed contact 2 according to the rotation of the movable element A.
7a, 27b, the power terminal E and the first load connection.
Connection terminal L₁And the second load connection terminal L _TwoOn between
・ It is turned off. That is, the movable contact 29
And the fixed contact 27a are the first contact S₁Constitutes a movable contact
The point 29 and the fixed contact 27b are connected to the second contact S_TwoMake up
You.

The mover A is driven in reverse by a reversing mechanism comprising a reversing spring 30 composed of a coil spring, a reversing handle 31, a push button handle 32, a slide cam 33 and the like. The reversing spring 30 has a lower portion engaged with a spring seat 24 provided at the center upper edge of the mover A, and an upper portion having a reversing handle 3.
The movable member A is inserted into a cylindrical portion 31a integrally protruding from the lower portion of the first member 1 to invert the movable element A in accordance with the movement of the inversion handle 31 in both sides. The reversing handle 31 is attached to the cover 7b.
An inverted triangular shaft 31c is inserted from below into a hole 52 opened at the bottom of the concave portion 51, and is provided on both sides of a cylindrical portion 31a below the reversing handle 31.
It is rotatably supported at zero. A pair of engaging projections 34 that engage with the slide cam 33 are protrudingly provided on upper sides of the rectangular parallelepiped portion 31b on the upper part of the reversing handle 31.

The push button handle 32 is provided in the recess 51 of the cover 7b.
The locking projections 36 are inserted into the vertical locking grooves 35 formed on the inner wall surfaces on both sides of the housing 51 so as to be vertically movable and housed in the recess 51. A return spring 37 is attached to the lower surface of the push button handle 32. The return spring 37 is formed by integrally extending a pair of return spring pieces 37a extending downward from the flat piece 37b toward the lower side, and is provided with a push button handle 32 in a hole 37d formed in the flat piece 37b. By inserting a projection 32a (see FIG. 7) protruding from the lower surface of the push button handle 32, it is attached to the lower surface of the push button handle 32. The push button handle 32 is constantly urged upward by making the tip end of the return spring piece 37a of the return spring 37 elastically contact the bottom surface of the concave portion 51.

The slide cam 33 is made of a substantially elastic thermoplastic resin such as polyacetal and is formed into a substantially rectangular shape. The slide cam 33 is sandwiched between the flat piece 37b of the return spring 37 and the lower surface of the push button handle 32. , Are held so as to be slidable in the swinging direction of the reversing handle 31. A pair of engaging projections (not shown) corresponding to the pair of engaging projections 34 provided on the reversing handle 31 are provided on the lower surface of both ends of the slide cam 33 in the sliding direction. A pair of spring pieces 33 projecting from the center of the side of the slide cam 33 so as to make the distance between them closer to the tip end.
a is provided. A protrusion formed on the lower surface of the push button handle 32 is inserted between the two spring pieces 33a, and when no pressing force is applied to the push button handle 32, the spring piece 33a
The spring cam returns the slide cam 33 to the home position. Of the pair of engaging projections 34 of the reversing handle 32, the engaging projection 34 located above is located closer to the center than the corresponding engaging cam 33. When a pressing force is applied to the push button handle 32, the engaging projection 34 in contact with the engaging cam 33 slides the slide cam 33 with the rotation of the reversing handle 31, and the other engaging projection 34 is raised above the slide cam 33. A space is formed on the lower surface of the push button handle 32 so as to be movable. That is, by pressing the push button handle 32, the up-and-down position of the both hooking projections 34 can be reversed, and the reversing handle 31 can be reversed.

The electronic components constituting the delay circuit B and the like are mounted on a printed circuit board 60. The printed circuit board 60 is placed on the upper surface opening of the body 7a and the tapping screw 61 is mounted thereon.
Is fixed by The electronic components constituting the delay circuit B and the like are mounted on both ends of the printed board 60, and the electronic components mounted on the printed board 60 are
As shown in FIG. 8, the components are stored in the component storage portions 62 and 63 provided at both ends of the portion a. A window hole 64 for inserting the cylindrical portion 31a of the reversing handle 31 into the body 7a is formed in the center of the printed circuit board 60. Light emitting diode LED and neon lamp NE mounted on printed circuit board 60
7 is covered by a lamp cover 65 exposed from a window 66 (see FIG. 3) provided on one side of the center of the cover 7b, as shown in FIG.

The body 7 is attached to a metal mounting frame 8.
That is, the lower end of one side piece 2b of the mounting frame 8 is brought into contact with the upper surface of the periphery of the cover 7b by fitting the cover 7b from below into the window hole 8a of the mounting frame 8, and the contact point is used as a fulcrum. By moving the coupling hook 11a on the fulcrum side
Is engaged in the coupling hole 8c. At this time, the lower edge of the vertical side of the other side piece 2b presses the coupling claw 11b inward due to the bending allowance due to the space 12 and the elastic force of the material of the cover 7b. In this way, when the connecting claw 11b gets over the lower end of the vertical side of the side piece 2b, the connecting claw 11b is
Will be involved. The container 7 is mounted on the mounting frame 8 with the coupling claws 11a, 11b engaged in the engaging holes 8c, 8c, respectively, as shown in FIGS. 8 through the window 8a.

As shown in FIG. 1, the push button switch 7 attached to the attachment frame 8 is provided with a piano handle 43.
The piano handle 43 pivotally engages a fulcrum rib 43b provided on one side edge with a concave portion 54 on one side of the cover 7b, and a locking foot 43 formed on the other side edge of the piano handle 43.
a into the space 12 formed in the cover 7b.
2a is mounted so as to be vertically movable. A lamp cover 65 is provided on the translucent portion 43c on one side of the center of the piano handle 43.
Light emitting diode LE passed through the lamp cover 65
The light of D and the neon lamp NE is transmitted through the through hole 43c.

The piano handle 43 is rotatable about the fulcrum rib 43b as a fulcrum by pushing the other side portion, and the push button handle 32 can be pushed and driven by pushing and rotating the piano handle 43. It has become. That is, when the piano handle 43 is depressed,
The push-button handle 32 is pushed down against the spring force of the return spring piece 37a, and the push-down handle 32 is pushed down, whereby the inversion handle 31 is inverted and rotated by the above-described operation. When the reversing handle 31 is reversed, the coil spring 30 reciprocates and swings, and the mover A is reversed, and the movable contact 29 contacts the fixed contacts 27a and 27b.

When the pressing force of the piano handle 43 is released after the movable element A is inverted, the return spring piece 3 of the return spring 37 is released.
The push button handle 32 is pushed up by the spring force of 7a, and the piano handle 43 also returns to the original position. At the same time,
The slide cam 33 also returns to the center portion by the spring force of the spring piece 33a. When the piano handle 43 is pressed down in this state, the mover A is inverted by the same operation as described above, and the movable contact 29 is separated from the fixed contacts 27a and 27b.
If the pressing force of the piano handle 43 is released after the mover A is inverted, the state returns to the original state. In short, each time the piano handle 43 is pushed down once, the mover A is inverted.

[0028]

According to the present invention, as described above, the first contact inserted between the power supply and the first load and the second contact inserted between the power supply and the second load are provided. A current detection circuit for detecting at least a load current to the second load, a switching element connected in parallel to a series circuit of the second contact and the current detection circuit, and a current generated by turning on the second contact. When the load current to the second load is detected by the detection circuit, the switching element is turned on. When the load current to the second load is no longer detected by the current detection circuit as the second contact is turned off, a timed operation is performed. A delay circuit for turning off the switching element after a lapse of a predetermined time from the start, a push button switch device for turning on / off the first contact and the second contact in conjunction with each other, and a push button handle of the push button switch mechanism for a piano Touch operation Since a Bruno handle, on the piano touch operation, it can be turned off, and therefore the appearance and the operability is improved.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a partial configuration of the same.

FIG. 3 is an exploded perspective view showing a further configuration of the above.

FIG. 4 is an exploded perspective view showing still another part of the above.

FIG. 5 is a bottom view of the body.

FIG. 6 is a plan view of the body in a state where the terminal unit is assembled.

FIG. 7 is a cross-sectional view of the push button switch of the above.

FIG. 8 is a partially broken side view showing a state where the push button switch is mounted on a mounting frame.

FIG. 9 is a front view showing a state where the push button switch is mounted on a mounting frame.

FIG. 10 is a circuit diagram of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Current detection circuit 2 Lighting load 3 Ventilation fan 32 Push button handle 43 Piano handle AC power supply B Delay circuit Q ₁ Switching element S ₁ First contact S ₂ Second contact 7 Push button switch 24 Open / close body 27a Fixed contact 29 Movable contact 31 Inverted Handle 32 Push button handle 43 Piano handle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-87117 (JP, A) JP-A-3-194823 (JP, A) JP-A-1-320724 (JP, A) JP-A-59-1984 5528 (JP, A) JP-A-4-14715 (JP, A) JP-A-5-182569 (JP, A) JP-A-58-168034 (JP, U) JP-A-58-168033 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01H 43/02-43/04 H01H 21/00 H01H 23/22 H05B 37/02

Claims (2)

(57) [Claims] A first contact inserted between a power supply and a first load, and a second contact inserted between the power supply and a second load.
A contact, a current detection circuit for detecting at least a load current to the second load, a switching element connected in parallel to a series circuit of the second contact and the current detection circuit, and a switch for turning on the second contact. When the load current to the second load is detected by the current detection circuit, the switching element is turned on and the second
A delay circuit for starting a time-limited operation when a current detection circuit stops detecting a load current to the second load with the turning off of the contact and turning off the switching element after a lapse of a predetermined time; A timer switch comprising: a push button switch device for turning on / off in conjunction with a second contact; and a piano handle for pressing a push button handle of the push button switch mechanism by a piano touch operation. 2. The timer switch according to claim 1, wherein the first load is a lighting load for illuminating the toilet, and the second load is a ventilation fan for ventilating the toilet.