JPS641635B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control device for electric blinds, and more specifically, the blinds can be raised and lowered quickly.
The present invention also relates to a control device for an electric blind that allows gradual adjustment of the slat angle with a simple operation.

[Prior Art] As a conventional electric blind of this type, there is one described, for example, in Japanese Patent Publication No. 50-627.

The electric blind described in the above-mentioned publication has a rotating shaft of a winding drum for winding up and down cables for raising and lowering slats placed horizontally in a bed box, and a DC motor and a multi-stage reduction gear mechanism installed at one end of the head box. An electrically operated type that automatically raises and lowers the slats after loading the slats has been put into practical use.

[Problems to be Solved by the Invention] However, in the conventional electrically operated type, when operating the switch when raising and lowering the slat or adjusting the angle, it is necessary to use either a self-holding circuit or an inching circuit (a circuit that can repeatedly perform temporary operations). For example, if a self-holding circuit was adopted, it would be suitable for lifting and lowering which requires a long operation time, but angle adjustment, which requires a short operation time, would require two operations in a short period of time. Moreover, when an inching circuit is used, it is necessary to hold down a button for a long time when going up and down, which causes many operational inconveniences.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned disadvantages, it is an object of the present invention to provide a means for quickly raising and lowering the slats of an electric blind and for slowly adjusting the angle of the slats, which is easy to operate and which enables switching between a self-holding circuit and an inching circuit.

[Means for solving the problem] An upper limit switch and a lower limit switch arranged in a head box, diodes connected in series to each of these limit switches, and a series set of the upper limit switch and the diode connected in series, and a lower limit switch. A parallel circuit with a limit switch and a series set of diodes is connected to a DC motor in series, and the output terminals are connected to respective lead wires; a transformer that steps down the commercial power supply voltage by being connected to a commercial power supply; At least two voltages are applied to the DC motor by connecting a plurality of terminals of the secondary winding of No. 1 to the terminals via movable contact pieces of a switching relay and movable contact pieces of raising and lowering relays to the output terminal, respectively. a first rectifier circuit connected to be able to supply the two voltages with respective polarities reversed; a second rectifier circuit connected to a second secondary winding of the transformer; Second
a rising relay connected in series with a normally open contact of the first changeover switch and a normally closed contact of the second changeover switch between the outputs of the rectifier circuit; and a normally open contact of the second changeover switch. a lowering relay connected in series with the normally closed contact of the first changeover switch, a voltage changeover relay connected in series with the normally open contact of the third changeover switch, and a normally closed contact of the third changeover switch. A series circuit of a contact piece and a resistor is connected in parallel, and a terminal connected to a connection point between the normally open contact piece and the normally closed contact piece and a connection point between the normally open contact piece and the normally closed contact piece are connected in parallel. A movable contact piece of the rising relay and a movable contact piece of the falling relay are respectively connected between the connected terminal and a connection point between the normally closed contact piece and the resistor, and a self-holding circuit of the rising relay and the falling relay is formed. This can be achieved by providing a control section formed in each case.

[Operation] The electric blind control device of the present invention switches the second changeover switch CSW2 when the blind is lowered.
When pressed, the normally open contact piece CSW21 closes, so the lowering relay D operates, and the movable contact piece d1 changes from terminal t4 to t3, and the movable contact piece d2 changes from terminal t1.
When switching from 0 to t9, the relay D self-holds and the DC motor M starts to rotate the rotary drive shaft in the head box.

As the rotary drive shaft rotates, the upper and lower slat cables wound around the drive shaft are unwound and the blind is lowered, and when the blind is lowered by a predetermined amount, the lowering limit switches DLS1 and DLS2 are opened and the DC motor M is stopped. do.

To raise the blind, use the first changeover switch CSW
When 1 is pressed, the normally closed contact CSW11 is closed, so the ascending relay U is operated, and the movable contact u1 is connected to the terminals t6 to t5, and the movable contact u2 is connected to the terminal t.
When switching from 8 to t7, the relay U self-holds, and a voltage of the opposite polarity to that at the time of descent is applied to the DC motor M, causing the rotary drive shaft in the head box to rotate.

As the rotary drive shaft rotates, the upper and lower slat cables become entangled and the blind rises, and when the blind rises by a predetermined amount, the lift limit switches ULS1 and ULS2 are opened and the DC motor M is stopped.

To adjust the angle of the slat, first press the third changeover switch CSW3, then the normally open contact piece CSW3
1 closes and the normally closed contact CSW32 opens, so the self-holding is released and the voltage switching relay S operates, and when the movable contact S1 switches from terminal t1 to terminal t2, the DC motor M is prepared so that a lower voltage is applied compared to the voltage when the blind is raised and lowered.

After this, the first or second changeover switch
By pressing CSW1 and CSW2, the slat will gently adjust its angle upward or downward while the buttons are pressed.

[Example] Hereinafter, an example of the present invention shown in the drawings will be described in detail.

First, the main structure of the brand, which is the premise of this invention, will be explained with reference to FIG.

DC motor M installed in head box 11
A pair of upper and lower slat cables 12 are wound around a rotational drive shaft driven by a rotary drive shaft, and a large number of slats 14 are installed horizontally via each of these upper and lower slat cables 12, and are frictionally engaged with the rotational drive shaft. The hanging slat tilting rope 13 is configured to change the angle of inclination of each of the slats.

Next, referring to FIG. 1, a wiring diagram of an electric circuit for raising and lowering the blind of the present invention and also for adjusting the inclination angle of the slats will be explained.

The first secondary winding l1 with an intermediate tap of a transformer T whose primary winding is connected to a commercial power supply (AC100V) via a fuse F is connected to a movable contact S1 of a voltage switching relay S to be described later. Terminal t1 and terminal t
2 is selectively connected to the first rectifier circuit DET1.

Output terminals B and W are selectively connected to the rectifier circuit DET1 via movable contacts u1 and d1 of rising and falling relays U and D, which will be described later, respectively.
The movable contact piece S1 of the voltage switching relay switches the output voltage (24V and 9V) up and down, and the movable contact pieces u1 and d1 of the lowering relay switch the terminal B of the connector.
is configured to be switched to a positive or negative electrode, and the terminal W is switched to a negative or positive electrode, respectively.

A second rectifier circuit DET is connected to the second secondary winding l2.
2 is connected to its DC output terminal, a smoothing capacitor C1, a normally open contact CSW11 of a self-returning push-type first changeover switch CSW1 and a second changeover switch CSW1, which constitute a part of the inching circuit. A series circuit of the normally closed contact CSW2 of CSW2 and the upward relay U, and the first and second changeover switches.
A normally open contact piece CSW2 of a self-returning push-pull type second changeover switch CSW2 that interlocks with the contact pieces CSW11 and CSW22 of CSW1 and CSW2, respectively.
1 and the normally closed contact piece CSW of the first changeover switch CSW1
12, a series circuit of descending relay D, and a third changeover switch CSW3 for self-holding, release, and stop.
A series circuit of the normally open contact CSW31 and the voltage switching relay S of the third changeover switch CSW3, and a series circuit of the normally closed contact CSW32 interlocked with the normally open contact CSW31 of the third changeover switch CSW3, the resistor R3, and the light emitting diode LED3 are connected in parallel. It is connected to the.

Further, a series circuit of a resistor R1 and a light emitting diode LED1 is connected in parallel to a series circuit of the normally closed contact CSW22 of the second changeover switch CSW2 and the upward relay U, and a normally closed contact CSW12 of the first changeover switch CSW1 is connected in parallel. A series circuit of a resistor R2 and a light emitting diode LED2 is connected in parallel to a series circuit of a lowering relay D and a series circuit of a resistor R2 and a light emitting diode LED2. Connection point P between CSW11 and CSW22
2 and connection point P3 between contact piece CSW21 and CSW12
are individually connected by movable contact pieces u2 and d2 of the rising relay U and the falling relay D, respectively, so that the relays U and D can be self-held, and a diode D1 and a rising limit switch ULS1 are connected between the connector terminals B and W. , ULS2 series circuit and diode D2, falling limit switch DLS1,
It consists of a circuit configuration in which a DC motor M is connected through a circuit in which a series circuit of DLS2 is connected in parallel.

C2 in FIG. 1 is a non-polar capacitor connected in parallel to the motor M.

Fig. 2 is an external view of a blind equipped with a control device for raising and lowering the blind and controlling the slat angle, which is constructed using the circuit described above. A DC motor M is connected to one end of this rotary drive shaft, and a slat vertical cable 12 and a slat tilting cable 13 are respectively attached to the rotary drive shaft.

Also, 14 is the slat, 15 is the bottom rail, 1
6 is a control box which houses the control unit CONT of the circuit shown in FIG.
17 is an outlet plug for connecting to a commercial power source.

FIG. 3 is an external view of the control box 16, and the front of the box is provided with displays 18a to 18c, light emitting diodes LED1 to LED3, and operation buttons 20a to 20c corresponding to the changeover switches CSW1, CSW2, and CSW3, respectively. ing.

The control device for raising and lowering the blind slats and adjusting the angle of the blind slats according to the present invention is constructed as described above, and the operation of raising and lowering the blinds and adjusting the slat angle using this device shown in FIGS. 1 and 2 will be explained below. do.

(1) Initial state The blind is lowered as shown in Fig. 2, and the lowering limit switch DLS1 or DLS2, which is an automatic stop device when lowering, is opened.

In addition, the first and second changeover switches CSW
1. The contact pieces CSW11, CSW21 of CSW2 and the contact piece CSW31 of the third changeover switch CSW3 are open, and the contact pieces CSW12, CSW22, and CSW32 are closed. In this state, the rising relay U and the falling relay D and voltage switching relay S is not energized, and the light emitting diode LED
1.LED2 (red) is extinguished and light emitting diode LED3 (blue) is lit.

(2) Blind raising device First switch for raising the blind
When the push button 20a that operates the contact pieces CSW11 and CSW12 of CSW1 is pressed, the first changeover switch is switched on.
Contact piece CSW11 of CSW1 is closed and contact piece CSW12
opens.

Therefore, the contact piece CSW11 of the first changeover switch CSW1 and the contact piece CSW1 of the second changeover switch CSW2.
A DC voltage of approximately 6V is applied to both ends of the coil of the ascending relay U through the CSW 22, the relay is energized, and its movable contacts u1 and u2 are connected to the contact point t.
6 to t5, and from t8 to t7.

This switching causes the third changeover switch to be closed from the positive voltage side of the rectifier circuit DET2.
A DC voltage of 6 V is applied to the rising relay U through the contact t7 which is in contact with the contact piece u2 via the contact piece CSW32 of CSW3 and the closed contact piece CSW22 of the second changeover switch CSW2.

Therefore, at this point, the first changeover switch
Even if the push button 20a for operating the contact pieces CSW11 and CSW12 of the CSW1 is released, the relay is self-retained and the energized state is maintained. At this time, the light emitting diode LED1 emits light through the resistor R1.

On the other hand, from the contact piece u1 of the lift relay U in contact with the contact t5 connected to the positive voltage side of the rectifier circuit DET1, to the terminal W of the connector, to the DC motor M, to the lift limit switches ULS1, ULS2,
A closed circuit is created that enters the negative voltage side of the rectifier circuit DET1 through the diode D1, the terminal B of the connector, and the contact piece d1 of the descending relay D that is in contact with the contact t4, and the motor M starts rotating and winds up the blind.

At this time, 24V DC is applied to both ends of the DC motor M, and the DC motor M rotates at the rated speed to quickly raise the blind. When the blind is completely raised, either the lift limit switch ULS1 or ULS2 is opened and the DC motor M stops. do.

(3) Blind lowering operation From the above state, press the second changeover switch CSW.
When the operation button 20b corresponding to the contact piece CSW21 of No. 2 is pressed, the contact piece CSW21 is closed, and the contact piece CSW
22 is opened, the self-held ascending relay U is deenergized, and the second changeover switch CSW is closed from the positive voltage side of the rectifier circuit DET2.
DC 6V is applied to both ends of the descending relay D through the contact CSW21 of the second switch CSW2 and the closed contact CSW12 of the first changeover switch CSW1, and when this relay is energized, the contact d1 changes from the contact t4 to the contact t3.
, contact d2 switches from contact t10 to contact t9, respectively, and the contact of third changeover switch CSW3, which is closed from the positive voltage side of rectifier circuit DET2.
CSW32, contact piece d2 in contact with contact t9, and closed first changeover switch CSW1
Relay D is self-maintained by a closed circuit that passes through contact piece CSW12 and reaches descending relay D.

Therefore, even if the operation button 20b is released at this point, the lowering relay D continues to be energized.

Furthermore, the light emitting diode is connected through resistor R2.
A voltage is applied across both ends of LED2, causing it to emit light, and the light emitting diode LED1, which had been emitting light, goes out.

On the other hand, by switching the contact point t4 of the contact piece d1 to t3, the positive voltage side of the rectifier circuit DET1 is connected to the contact piece d1, the terminal B of the connector, the diode D2,
The rectifier circuit DET passes through the lower limit switches DLS1 and DLS2, the DC motor M, the terminal W of the connector, and the contact piece U1 that is in contact with the contact point t6.
A closed circuit is formed which enters the negative voltage side of 1, the DC motor M starts rotating in the opposite direction to the case of raising the blind, and the blind starts lowering.

At this time, a 24V DC voltage is applied to both ends of the DC motor M, causing it to rotate at the rated speed and lowering quickly.
The blinds are fully lowered and the lowering limit switch is activated.
When either DLS1 or DLS2 is opened, the DC motor M stops.

(4) Manipulating the blind midway For example, when attempting to stop the blind while it is being lowered, the circuit state is as described above.

At this time, when the stop operation button 20c is pressed, the contact piece CSW31 of the third changeover switch CSW3 closes.
When the contact piece CSW32 is opened, the light emitting diode LED3 is extinguished, the voltage switching relay S is energized, and the contact piece S1 is switched from the contact point t1 to the contact point t2.

From the positive voltage side of the rectifier circuit DET2, the contact CSW32 of the third changeover switch CSW3, the contact d2 in contact with the contact t9, and the first changeover switch
Lowering relay D is passed through contact piece CSW12 of CSW1.
The self-holding circuit that was energizing is opened, and the lowering relay D is de-energized, and its contact d1 becomes contact t3.
to t4, and the DC motor M stops.

At the same time, the light emitting diode LED2 turns off.

The same applies to stopping while the blind is being raised.

(5) Adjusting the slat angle When the blind stops, the third switch
The contact piece CSW31 of CSW3 is closed, and the contact piece CSW3
2 is open, and when the operation button 20a is pressed to close the contact CSW11 of the first changeover switch CSW1 and open the contact CSW12, the first changeover switch is switched from the positive voltage side of the rectifier circuit DET2.
CSW1 contact piece CSW11, second changeover switch
A closed circuit can be formed through the contact piece CSW2 of CSW2 to the ascending relay U, and the ascending relay U is energized and the light emitting diode LED1 and LED
3 emits light.

At this time, the rectifier circuit DET1 is connected to the contact S of the relay S.
1 is connected to the low voltage side contact t2, and the circuit
Contact t5 of the relay from the positive voltage side of DET1
It passes through the contact piece U1 that is in contact with the connector terminal W, the DC motor M, and the upward limit switch.
ULS1, ULS2, diode D1, connector terminal B and contact piece d1 in contact with contact t4
A low DC voltage of 9V is applied to the motor M through a closed circuit that passes through the circuit and reaches the negative voltage side of the rectifier circuit DET1, and the DC motor M rotates at a low speed to connect the slat 1.
4. Tilt gently.

When the operation button 20a is released, the first changeover switch
The contact piece CSW11 of CSW1 is opened, and the contact piece CSW1
2 is closed, the rising relay U is de-energized, and the light emitting diodes LED1 and LED3 are extinguished.

In this state, if the operation button 20b is pressed to close the contact piece CSW21 of the second changeover switch CSW2 and open the contact piece CSW22 to operate the lowering relay D, each relay contact piece u1, d1 will be set at t6. , t3, the slat 14 is gently tilted in the opposite direction to that in the previous case.

[Effects of the Invention] As described above, the present invention adopts means for solving the above problems, and in particular, a DC motor is attached to the rotating shaft for winding up and down ropes that raise and lower the slats, and at least It has a circuit for selectively supplying two voltages, and a circuit for inverting the polarity of each of the two voltages, and the motor can raise and lower the blind and angle the slats with either of the voltages and polarities selected for the motor. Since the adjustment can be made, the following effects can be achieved.

The rotation of the DC motor is approximately 1/2 of the rated rotation speed.
The rotation speed can be easily reduced to the rotation speed by one-touch operation of the operation button, and by using this switching of the motor rotation speed, the blind can be quickly raised and lowered without pressing the operation button for a long time, and the inclination angle of the slat can be adjusted. It has the effect of being done slowly.

[Brief explanation of the drawing]

Each of the figures shows an embodiment of the present invention. Figure 1 is a circuit diagram of the blind lifting and slat angle adjustment circuit, Figure 2 is an external view of the entire device, and Figure 3 is a front view of the operating box. It is. T...transformer, DET1, DET2...rectifier circuit, B, W...terminal, CSW1, CSW2, CSW3
...Selector switch, CSW11, CSW12, CSW
21, CSW22, CSW31, CSW32... contact piece, U, D, S... relay, u1, u2, d1,
d2, S1...Movable contact piece of relay, ULS, ULS
1, ULS2...Upper limit switch, DLS,
DLS1, DLS2...lower limit switch,
CONT...Control unit, M...DC motor.

Claims (1)

[Claims] 1. Upper and lower slat cables are wound around a rotary drive shaft that is driven in a direct current mode and is disposed in a head box, and a large number of slats are installed horizontally via each of these upper and lower slat cables, and a friction coupling is attached to the rotary drive shaft. In an electric blind in which the inclination angle of each of the slats is changed by a slat tilting rope that hangs together, an upper limit switch ULS and a lower limit switch DLS are provided in the head box 11, and each of these limit switches ULS and DLS is provided. A parallel circuit of diodes D1 and D2 connected in series, a series set of an upper limit switch ULS and a diode D1, and a series set of a lower limit switch DLS and a diode D2 connected in series is connected in series to the DC motor M. output terminals B and W to which lead wires can be connected, respectively; a transformer T that lowers the commercial power supply voltage by being connected to a commercial power supply; and a plurality of terminals of a first secondary winding l1 of the transformer T. At t1 and t2, terminals t3 and t4 and terminals t5 and t6 are connected to the movable contact piece S1 of the switching relay S and the output terminals B and W through the movable contact pieces d1 and u1 of the ascending and descending relays U and D, respectively.
a first rectifier circuit DET1 connected to the DC motor M so as to be able to supply at least two voltages and the two voltages with respective polarities reversed; and a second rectifier circuit DET1 of the transformer T.
a second rectifier circuit connected to the secondary winding l2 of
A normally open contact CSW1 of the first changeover switch CSW1 is connected between DET2 and the output of this second rectifier circuit DET2.
Normally closed contact piece CSW of 1 and 2 changeover switch CSW2
22, a normally open contact CSW21 of the second changeover switch CSW2, and a normally closed contact CSW of the first changeover switch CSW1.
12, a voltage switching relay S connected in series with the normally open contact CSW31 of the third changeover switch CSW3, and a normally closed contact CSW32 of the third changeover switch CSW3. Resistance R
The terminal t7 and the normally open contact piece CSW2 are connected in parallel with the series circuit with the normally open contact piece CSW11 and the normally closed contact piece CSW22.
The terminal t9 connected to the connection point P3 between 1 and the normally closed contact piece CSW12, the normally closed contact piece CSW32, and the resistor R
A control unit in which a movable contact u2 of the ascending relay U and a movable contact d2 of the descending relay D are respectively connected between the connection point P1 of the ascending relay U and the descending relay D to form a self-holding circuit for the ascending relay U and the descending relay D. An electric blind control device equipped with CONT and CONT.