JP3175966B2 - Delay switch - Google Patents

Abstract

PURPOSE:To provide a delay switch capable of turning off loads with a delay during operation of a switching element by enabling one load to be controlled from two places. CONSTITUTION:When a make break contact S1 is closed with a changeover switch SW switched to a second contact (b), AC power is supplied to a fan 3. A delay circuit B turns a switching element Q1 on in response to the detection output of a current detection circuit 1, the switching element Q1 being connected in parallel to a series circuit of the primary side of the current transformer CT of the current detection circuit 1, a contact S2 and the fan 3. When the make break circuit S1 is opened, the current detection circuit 1 produces no detection output, but the delay circuit B holds the switching element Q1 in an ON state for a certain time using a timer circuit 5 and a conduction holding circuit 4. Therefore, operation of the fan 3 is stopped after a delay of the time. When the changerover switch SW is switched between the first contact (a) and the second contact (b) with the make break circuit S1 opened, the fan 3 can be turned on and off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a delay switch for delaying a load operation.

[0002]

2. Description of the Related Art Conventionally, a ventilating fan is provided in a toilet or a washroom, and a delay switch is sometimes provided to operate a ventilating fan for a certain period of time by a switch operation and then stop the fan. However, since this delay switch was not designed to be able to be operated from two places by connecting another switch, a common ventilation fan was provided for the toilet and the toilet, and the ventilation fan was operated in each place. For this reason, a three-way switch was provided to turn on and off the ventilation fan.

[0003]

However, in this case, there is a problem that the ventilation of the toilet cannot be sufficiently performed because the switch is not a delay switch. The present invention has been made in view of the above-described problems, and provides a delay switch that can be turned on and off with the same load by connecting a changeover switch provided at another location.

[0004]

In order to achieve the above object, the present invention provides first and second terminals for connecting both ends of a series circuit of a load and a power supply, and a switching contact between the two terminals. A current detection circuit connected to the current detection circuit, a delay circuit that generates an output from the generation of the detection output of the current detection circuit until a certain time elapses after the generation of the detection output, and a series circuit of the current detection circuit and the switching contact. A switching element that is connected in parallel and holds the ON operation while the output of the delay circuit is being generated; and a feed terminal that is commonly connected to the first terminal is provided; A first contact of the changeover switch is connected to the second terminal of the changeover switch, and a load and a power supply are connected between a common terminal of the changeover switch and the first terminal. Connect a series circuit It is obtained by allowing the on-off of the load changeover switch by the.

[0005] The above load may be a ventilation fan for ventilating two places.

[0006]

According to the present invention, the first terminal of the two-contact changeover switch is connected to the feed terminal, the second contact of the changeover switch is connected to the second terminal, and the changeover switch is connected to the second terminal. By simply connecting a series circuit of a load and a power supply between the common terminal and the first terminal, the load can be turned on / off by operating a changeover switch provided at another location even when the on / off contact on the delay switch side is off. When the changeover switch is off, the load can be turned on and off by the on / off contact, and the load can be delayed off from on to off.

Here, for example, when the ventilation of the toilet and the lavatory is performed by a common ventilation fan, if the changeover switch is connected to the lavatory and the delay switch of the present invention is provided in the toilet and connected as described above, the operation of the changeover switch can be performed. However, the ventilation fan can be operated by operating the delay switch, and the operation of the ventilation switch can be turned off by operating the delay switch on the toilet side, and sufficient ventilation can be performed.

[0008]

The present invention will be described below with reference to examples. Figure 1
1 shows a circuit according to an embodiment of the present invention,
Then the switching contact S ₁Is a current transformer C that constitutes the current detection circuit 1.
For driving primary side of T and light emitting diode LED for operation display
Current transformer CT₀Power supply terminal E and load connection end through the secondary side of
Child L₁And the current transformer CT₀, On the primary side of CT
Send common connection point to terminal L₀Connected to

The delay circuit B is provided with a
Primary side of current transformer CT and second contact point S ₁In a series circuit with
Switching element Q consisting of column-connected triacs
₁And detection of the secondary side of the current transformer CT of the current detection circuit 1
After the output is generated, a certain time
A timer circuit 5 for generating an output until the timer
While the output of the circuit 5 is generated, the switching element Q₁of
The continuity holding circuit 4 for holding the ON operation and a malfunction described later.
And a prevention circuit 6.

The timer circuit 5 is constituted by a time constant circuit of CR, and the secondary output of the current transformer CT of the current detection circuit ₁ is rectified by the diode bridge DB1 to obtain a capacitor C.
Yes so as to charge the _1, it is to set a delay operation time of the ventilation fan 3 by the discharge time of the capacitor C ₁ which is determined by the setting of the variable resistor VR the connected to both ends of the capacitor C _1. Here, the peak value of the rectified output of the diode bridge DB ₂ of the conduction holding circuit 4 is regulated by a voltage regulating circuit composed of a resistor R ₂ and a Zener diode ZD. It is so as to charge the capacitor C ₁ via the _1. The continuity holding circuit 4 includes a diode bridge DB ₂ , S
It is configured using CRQ ₂ , transistor Q ₃ , FET Q _4, etc., and keeps the switching element Q ₁ conductive while the charging voltage of the capacitor C ₁ is equal to or higher than a certain voltage.

Next, the operation of the circuit of FIG. 1 will be described. First, as shown in FIG. 11, a case will be described in which the toilet X, the washroom Y, and the ventilation fan 3 are connected by the duct 2, and the ventilation of the toilet X and the washroom Y is performed by one ventilation fan 3. In this case, as shown in FIG. 1, the first contact a of the changeover switch SW provided in the washroom Y is connected to the feed terminal L ₀ and the load connection terminal L
₁ is connected to the second contact b of the changeover switch SW, and a series circuit of the power supply AC and the ventilation fan 3 as a load is connected between the power supply terminal E and the common terminal of the changeover switch SW.

The switching contact S on the delay switch side
₁ is off, in the state where the changeover switch SW is turned to the second contact b as shown in FIG. 1, not charged capacitor C ₁ of the timer circuit 4, is under bias FETs Q ₄ (Depression mode). Therefore, the primary side of the power source AC, current transformer CT _0, resistors R _9, the diode bridge DB _2, resistors R _6, resistors R _8, FETs Q
_4, the diode bridge DB _2, changeover switch SW
Current flows through the path of the second contact b, the ventilation fan 3 and the power supply AC. Therefore, the base potential of the transistor Q ₃ is lowered, the transistor Q ₃ is turned off. Therefore SC
RQ ₂ a gate current is not supplied to, SCRQ ₂ in off, and is not to apply a trigger for turning on the switching element Q _1. Thus if the primary current of the current transformer CT ₂ is small, the secondary output is not increased, the light emitting diode LED does not emit light. On the other hand, neon tube NE is power
A current flows through the path of the resistor R ₀ , the neon tube NE, the changeover switch SW, the ventilation fan 3, and the power supply AC to emit light, indicating that the switching contact S ₁ is in an off state.

The capacitor C₁Connected to both ends of the
Transistor Q_FiveAnd this transistor Q_FiveControl the conduction of
Transistor Q₆Noise during the standby
Sa C ₁To prevent charging from being superimposed directly on the battery
The work prevention circuit 6 is constituted. Next, the switching contact A is turned on.
Contact S₁Is turned on, power supply AC, current transformer CT₀of
Primary side, primary side of current transformer CT, contact point S₁, Switch
In the path of the second contact b of the switch SW, the ventilation fan 3 and the power supply AC
When current flows, the ventilation fan 3 starts operating.

And a current transformer CT₀Output on the secondary side is large
The light emitting diode LED lights up and the resistance R₀When
Since the series circuit with the neon tube NE is short-circuited, the neon tube
NE goes out. That is, the ventilation fan 3 which is the load was turned on.
Show that. On the other hand, the current transformer CT of the current detection circuit 1
An output, that is, a detection output is also generated on the secondary side. This secondary side
Depending on the output, the capacitor C₁Is charged, FET Q_Four
Since a negative voltage is applied between the gate and source of
If FETQ_FourTurns off. Thus, the FET
Q_FourTurns off, the transistor Q_ThreeBi to be turned on
This transistor Q_ThreeIs turned on and S
CRQ_TwoIs supplied with gate current, and SCRQ_TwoIs on
Become. Therefore, SCRQ_TwoTurns on the diode
Ledge DB _TwoThrough the switching element Q₁Trigger on
Light, switching element Q₁Turns on.

[0015] Next is switching contact S ₁ delayed switch is turned off, but the secondary output of the current transformer CT in the current detection circuit 1 is eliminated, the voltage across the capacitor C ₁ discharges through a variable resistor VR eventually the on state switching element Q ₁ until drops below the cut-off voltage of FETs Q ₄ continues. State of the neon tube NE and the light emitting diode LED is not changed while the switching element Q ₁ is turned on.

After a certain period of time, when the voltage across the capacitor C ₁ drops to a voltage at which the FET Q ₄ turns on,
Current flows through the FETs Q _4, the transistor Q ₃ is turned off. Accordingly, SCRQ _{2 is} also turned off, and the switching element Q ₁ is not triggered, so that the power supply A to the ventilation fan 3
The supply of C is stopped, and the process returns to the standby state. Incidentally, a current flows through the FETs Q ₄ as described above, the transistors Q _5,
Since Q ₆ is turned on, it charges the capacitor C ₁ in this case is quickly discharged. Therefore, switching when stopping the operation of the ventilation fan 3 is performed smoothly.

The states of the light emitting diode LED and the neon tube NE are reversed and return to the original state. When switching contact S ₁ as shown in FIG. 1 is turned off, switch the changeover switch SW ₁ which is provided on the lavatory X side to the first contact a primary power source AC, current transformer CT ₀ A current flows through the path of the side, the feed terminal L ₀ , the first contact a of the changeover switch SW, the ventilation fan 3 and the power supply AC, and the ventilation fan 3 operates.

[0018] Also switching contact S ₁ of the switch delay in this state in the toilet Y side is opened and closed, current transformer of the current sensing circuit 1 C
No current flows on the primary side of T, and the delay circuit B does not operate.
Since the other switching contact S ₁ is the change-over switch SW of the toilet X side is switched to the second contact b in the OFF state, there is no power supply to the ventilation fan 3, ventilating fan 3 stops. The changeover switch S switching contact S ₁ is in the on state
When W is switched to the second contact b side, the operation being performed is the power supply to the ventilation fan 3 continues the operation is stopped after the delay a predetermined time when the switching contact S ₁ delayed switch is turned off .

The switch structure of the delay switch of this embodiment is a so-called piano handle switch structure, and FIGS. 2 to 4 show exploded perspective views thereof. Switching contact S ₁ and the delay circuit device body 7 having a built-in B, etc. synthetic resin body 7
a and a cover 7b made of synthetic resin.
body engaging leg 10 suspended from a pair of opposite side surfaces
The body engaging hole 10a provided in the
To be engaged with each other.

The cover 7b further has a pair of engaging holes 8 formed on both side surfaces thereof and formed on the vertical pieces of both side pieces 8b, 8b of the mounting frame 8.
The engaging claws 11b, 11b respectively corresponding to c are protruded integrally with each other, and a space 12 for obtaining a bending allowance formed by a hole vertically penetrating the outer wall of the cover 7b is provided at the back of one of the engaging claws 11b. The engaging claw 11b can be elastically bent inward.

Also, connection terminals are provided on both sides of the center of the body 7a.
The storage portions 13 and 14 are formed, and one of the connection terminal storage portions 13 is formed.
Denotes a power supply terminal plate 15 constituting the power supply terminal E, the locking spring 1
6. The quick connection terminal consisting of the release button 17 is stored, and the other connection is made.
Feed terminal L ₀Terminal board 1 constituting
8, a quick-connecting terminal comprising a locking spring 19 and a load connecting terminal L
₁Terminal comprising a terminal plate 20 and a locking spring 21
And each terminal L₀, L₁And a common release button 22
ing. Each terminal is provided on the lower surface of the body 7a as shown in FIG.
E, L₁, L_TwoWire insertion holes 71, 72, 73 corresponding to
Are provided in these wire insertion holes 71, 72, 73.
Each terminal consisting of quick connection terminal by inserting the core wire of
E, L₀, L₁Power supply AC, changeover switch SW, change
The air fan 3 can be electrically connected as shown in FIG.
It has become so.

The load connection terminal plates 20 of the terminal L ₁ is Yes extending into the central housing portion 23 rides over the connection bulkhead terminal accommodating portion 14 as shown in FIG. 6, the fixed contact 27a to the extending piece 20a Is provided. The terminal plate 18 of the feed terminal L ₀ is connected to the primary side common connection point of the current transformers CT ₀ and CT ₁ mounted on a printed circuit board 60 to be described later by a lead wire 28.

[0023] The central housing section 23 is disposed a support plate 25 which is electrically connected to the power supply terminal plate 15, the opening and closing body A is disposed with a switching contact S ₁ on the supporting plate 25 . The opening / closing body A is formed of a conductive plate, is placed in the central storage portion 23, and both ends are fitted into V-shaped concave portions 23a (shown in FIG. It is rotatable about the lower part of the V-shaped recess 23a in contact with the support plate 25.

[0024] Then, the opening and closing member A movable contact S ₁ is fixed contact 27a in response to rotation of the closing member A which is provided on the projecting piece on the upper end sides are projected upward of, 27b in contact, apart open ,
The power supply terminal E is turned on and off between the first and second load connection terminals L ₁ and L ₂ . This opening / closing body A
Is driven by a reversing mechanism including a coil spring 30, a reversing handle 31, a push button handle 32, a slide cam 33 and the like.

The coil spring 30 has a lower portion engaged with a spring seat 24 provided at the upper center of the opening / closing body A, and an upper portion integrally projecting from a lower portion of the reversing handle 31.
The opening / closing body A is driven to be reversed in accordance with the movement of the reversing handle 31 in both directions by being inserted into the opening a. The reversing handle 31 is inserted from below into a hole 52 opened at the bottom of the concave portion 51 of the cover 7b, and the inverted triangular shaft 31c provided on both sides of the lower tubular portion 31a of the reversing handle 31 is supported by a bearing 50 on the inner wall of the cover 7b. , Which are rotatably supported on the upper side of the reversing handle 31 and on the upper sides on both sides of the rectangular parallelepiped portion 31b, the engaging projections 34 which engage with the slide cam 33,
34 are protruded.

The push button 32 is engaged with the engaging projections 36, 36 in the vertical engaging grooves 35 formed on the inner wall surfaces on both sides of the concave portion 51 of the cover 7b, and is housed in the concave portion 51 so as to be vertically movable. A return spring 37, which is formed by integrally extending two return spring pieces 37a, 37a extending downward from the flat piece 37b downward, is provided on a lower surface of the push button 32 in a hole 37d formed in the flat piece 37b. By inserting the protruding projection 32a, it is attached to the lower surface of the push button 32, and the tip of the return spring piece 37a, 37a of the return spring 37 is constantly biased upward by elastically contacting the bottom surface of the concave portion 51.

The slide cam 33 is made of a thermoplastic resin having a high elasticity such as polyacetal, and is formed in a substantially rectangular shape. The slide cam 33 has an inverted triangular cross section corresponding to the engaging projection 34 of the reversing handle 31 on the lower surface of both side sides. An engaging cam body (not shown) having a protruding shape is provided, and a pair of spring pieces 33a, 33a integrally protruding in a C-shape are provided on the inner side of another side portion, and the tips of the spring pieces 33a, 33a are provided. An engaging portion (not shown) formed on the lower surface of the push button 32 is inserted therebetween, and the slide cam 33 is slidably mounted on the lower surface of the push button 32, and is anti-slidable by the elasticity of the spring pieces 33a, 33a. It gives a return force in the direction.

The printed circuit board 60 has mounted thereon electronic components constituting the delay circuit B and the like, and has a body 7a.
The components mounted on the upper surface opening of the body 7a and fixed by tapping screws 61, and mounted on the lower surfaces at both ends are stored in component storage portions 62 and 63 provided at both ends of the body 7a as shown in FIG. A window hole 64 at the center of the printed circuit board 60 is a hole for inserting the cylindrical portion 31a of the reversing handle 31 from above into the body 7a. The lamp cover 65 is the printed circuit board 6
Light emitting diode L in the above circuit mounted on
As shown in FIG. 7, the ED and the neon tube NE are covered by a window 66 provided on one side of the center of the cover 7b.

The delay switch thus constructed is configured such that the body 7 is fitted into the window hole 8a of the metal mounting frame 8 from below, and the lower end of the vertical side of one side piece 2b of the mounting frame 8 is covered with the cover 7b. When the contact point 11a is rotated with the contact point as a fulcrum in a state of contact with the peripheral upper surface, the engagement claw 11a on the fulcrum side engages with the engagement hole 8c, and the lower end of the vertical side of the other side piece 2b is Then, it is pushed inward by the bending allowance and the elastic force of the material of the cover 7b to get over the engaging claw 11b and engage the engaging claw 11b into the engaging hole 8c. The engaging claws 11b, 11b are engaged with the engaging holes 8c,
In a state where the body 7 is fixed to the mounting frame 8 by being engaged with the mounting frames 8c, the push button 32 projects from the window 8a of the mounting frame 8 as shown in FIGS.

When the piano handle 43 is attached as shown in FIG. 10 in the state of being attached to the attachment frame 8 in this manner, a piano handle type delay switch is completed. The piano handle 43 covers a fulcrum rib 43b provided on one side edge.
b is rotatably inserted into and engaged with the concave portion 54 on one side, and
An engagement foot 43a formed on the other side edge of the piano handle 43 is mounted in the space 12 on the other side of the cover 7b so as to be vertically movable. At this time, the lamp cover 65 faces the translucent portion 43c on one side of the center of the piano handle 43, and is illuminated with light from the light emitting diode LED and the neon tube NE through the lamp cover 65.

The piano handle 43 has a fulcrum rib 43b.
Is rotatable around the fulcrum, and the push button 32 can be pushed and driven by pushing and rotating the piano handle 43. That is, when the piano handle 43 is depressed, the push button 32 is depressed against the return spring piece 37a, and the slide cam 33 is lowered by depressing the push button 32, and an engagement cam body (not shown) on one side lower surface of the slide cam 33 is provided. The vicinity of the base of the inwardly inclined surface of the camshaft hits one engaging projection 34 of the reversing handle 31 in an inclined state, and when the push button 32 is further pressed, the engaging projection 34 extends along the inner inclined surface of the engaging cam body (not shown). Is pushed down, and the reversing handle 31 is reversed and rotated.

The coil spring 30 when the turning handle 31 as described above is rotated in the reverse direction is inverted swung reversing the closing body A, switching contact S ₁ is at to contact with the fixed contact 27a. When the pressing force of the piano handle 43 is released after this reversal, the push button 32 is pushed up by the return spring piece 37a of the return spring 37, and the piano handle 43 also returns to the original state. At the same time, the slide cam 33 slides and returns to the central portion by the spring force of the spring piece 33a. When the piano handle 43 is depressed in this state, the opening / closing body A is inverted by the same operation as described above, and the opening / closing contact S ₁ becomes the fixed contact 2.
7a. After this reversal, if the pressing force of the piano handle 43 is released, the state returns to the original state.

The delay switch according to the present invention in this way is it is possible to turn on and off the switching element S ₁ by operating the piano handle 43. In the above embodiment, the ventilation fan 3 is used as a load, but the invention is not limited to this.

[0034]

Since the present invention is constructed as described above, the first first switch of the two-contact changeover switch is provided at the feed terminal.
By connecting the contact to the second terminal of the changeover switch and connecting the series circuit of the load and the power supply between the common terminal of the changeover switch and the first terminal, the delay is increased. Even if the switch contact is off, the load can be turned on and off by operating a changeover switch installed at another location. When the changeover switch is off, the load can be turned on and off with the delay switch on / off contact. There is an effect that the load can be off-delayed at the time of the off operation.

When the ventilation between the toilet and the lavatory is performed by a common ventilation fan, if the switch for the lavatory is connected as described above with the delay switch of the present invention provided in the toilet, even if the switch is operated, The ventilation fan can be operated even by operating the on-off contact of the delay switch, and the operation of the ventilation fan can be turned off in the operation on the toilet side, and sufficient ventilation can be provided.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of one embodiment of the present invention.

FIG. 2 is an exploded perspective view with a part omitted from the above.

FIG. 3 is an exploded perspective view with a part omitted from the above.

FIG. 4 is an exploded perspective view with a part omitted from the above.

FIG. 5 is a rear view of the same body.

FIG. 6 is a top view of the body.

FIG. 7 is a sectional view showing a state where the piano handle is not attached.

FIG. 8 is a partially cutaway side view showing a state where the piano handle is not attached to the above-mentioned attachment frame.

FIG. 9 is a front view showing a state where the piano handle is not attached to the above-mentioned attachment frame.

FIG. 10 is a side view of the same.

FIG. 11 is an explanatory diagram of a usage example of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Current detection circuit 3 Ventilation fan 4 Continuity holding circuit 5 Timer circuit S ₁ Opening / closing contact Q ₁ Switching element AC power SW Switching switch a First contact b Second contact B Delay circuit

Continuation of front page (56) References JP-A-4-87117 (JP, A) JP-A-3-194823 (JP, A) JP-A-1-320724 (JP, A) JP-A-59-5528 (JP) JP-A-5-182569 (JP, A) JP-A-58-168034 (JP, U) JP-A-58-168033 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) H01H 43/04 H01H 23/22 H05B 37/02

Claims (2)

(57) [Claims] A first terminal connecting both ends of a series circuit of a load and a power supply; a current detection circuit connected between both terminals via a switching contact; and a detection output of the current detection circuit. A delay circuit that generates an output until a certain time elapses after the occurrence of the delay circuit, and a delay circuit that is connected in parallel to a series circuit of the current detection circuit and the switching contact, and is turned on while the output of the delay circuit is generated. A switching element for holding an operation, a feed terminal commonly connected to the first terminal, and a first first contact of a two-contact changeover switch connected to the feed terminal. The second contact of the changeover switch is connected to the switch, and a series circuit of a load and a power supply is connected between the common terminal of the changeover switch and the first terminal. Delay switch, characterized in that was. 2. The delay switch according to claim 1, wherein said load is a ventilation fan for ventilating two places.