JPH0998883A - Curtain opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain opening/closing device having little danger of a malfunction caused by external magnetic field, not generating an arc causing electromagnetic noises, and requiring no flexible cord. SOLUTION: Curtain runners 2 suspending a curtain are slidably supported on a curtain rail 3. The runners 2 are provided with coils 4a, 4b, 4c and position detecting photo-sensors 6a, 6b, 6c, and the curtain rail 3 is provided with magnets 5 and contrast patterns. The photo-sensors 6a, 6b, 6c and the coils 4a, 4b, 4c are connected via an electric circuit 12, and excitation signals are outputted to the coils 4a, 4b, 4c in response to the contrast pattern detection signals outputted from the photo-sensors 6a, 6b, 6c. The runners 2 are energized by the magnetic force generated between the coils 4a, 4b, 4c and the magnets 5 and are moved in the curtain rail 3. A switch 9, a sliding path, sliding contacts 11a, 11b, and a rectifying circuit 13 are provided between the electric circuit 12 and a DC power source 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a curtain opening / closing device capable of electrically opening and closing a curtain.

[0002]

2. Description of the Related Art Conventionally, curtain opening / closing devices of this type have been disclosed in JP-A-62-224319 and JP-A-63-245.
There was something like the one disclosed in Japanese Patent Publication No. 244. For example,
In JP-A-62-224319, along the longitudinal direction of the curtain rail, magnets are continuously arranged at a constant pitch so that the polarities are alternately arranged, and a coil facing the magnet and a hall element are arranged on a runner. A technique has been disclosed in which the coil is connected to a hall element, and an energizing wire from a power source is arranged along the curtain so as to be movable together with the curtain connected to the runner. Also, JP-A-63-245244
The gazette discloses a technique in which a wiring board is provided along a rail to supply an exciting current to a coil via a sliding contact fixed to a runner. That is, in the above-mentioned conventional technique, the position of the runner is detected by a hall element or a sliding contact,
An exciting current is supplied to the coil according to the detection result, and a structure is formed in which the runner is linearly moved in one direction by the interaction between the magnetic force line generated by the coil receiving the exciting current and the magnetic force line generated by the magnet. Was. In other words, the timing at which the exciting current should be supplied to the coil is determined by the function of the Hall element or the sliding contact.

[0003]

However, the structure in which the position of the runner is detected by the Hall element or the sliding contact as in the above-mentioned conventional technique has the following drawbacks. For example, the technique using the Hall element has a problem that it is easily affected by an external magnetic field. In particular, in vehicles, there are many devices that generate a strong magnetic field, such as an electromagnetic actuator, and there is a high risk that the Hall element will be exposed to such an external magnetic field and malfunction. Further, when the exciting current of the coil is directly interrupted by the sliding contact, an arc is generated from the sliding contact, which becomes a source of electromagnetic noise and adversely affects, for example, an audio device mounted on a vehicle. Incidentally, the applicant has previously proposed, by Japanese Patent Application No. 6-31501, a technique for controlling the coil by detecting the position of the runner with a photo sensor and a bright / dark pattern, and has dealt with the above problem. However, according to the embodiment, the structure uses the flexible cord, and therefore the flexible cord becomes long when the opening and closing width of the curtain is wide, and there is a handling inconvenience that the structure for installing the flexible cord needs to be devised. It was

The present invention is to solve the above-mentioned problems, and unlike the prior art, there is little risk of malfunction due to an external magnetic field, and not only does an arc that is a source of electromagnetic noise not occur, but a flexible cord is used. It is an object of the present invention to provide a curtain opening / closing device that is not necessary.

[0005]

The present invention achieves the above object. First, the invention according to claim 1 is a runner for suspending a curtain, and a curtain rail for slidably supporting the runner. A coil and a photosensor for detecting the position of the runner are provided on the runner, and a magnet and a light-dark pattern facing the photosensor are provided on the curtain rail, and a magnetic field generated between the coil and the magnet is provided. In the curtain opening / closing device for urging the runner with a different force, a sliding path is provided along the light / dark pattern, and a switch for opening / closing the curtain is provided between the sliding path and the DC power source. A rectifier circuit is provided between an electric circuit and a sliding contact, and a curtain opening / closing device in which a sliding contact is slid on a sliding path is provided.

The invention according to claim 2 provides a curtain opening / closing device having a plurality of sliding paths and sliding contacts, and the switch having a plurality of movable contact pieces.

According to a third aspect of the present invention, there is a pair of sliding contacts, a first diode having an anode connected to one sliding contact side and a cathode connected to the positive side of an electric circuit, and one sliding contact. The second diode having the cathode connected to the side and the anode connected to the negative side of the electric circuit, the third diode having the anode connected to the other sliding contact side and the cathode connected to the positive side of the electric circuit, and the other slide. A rectifier circuit is configured with a fourth diode having a cathode connected to the moving contact side and an anode connected to the negative side of the electric circuit, and one sliding contact side is connected to the curtain closing end of the electric circuit, and the other Provided is a curtain opening / closing device in which a sliding contact side is connected to a curtain open end.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment according to the present invention will be described with reference to FIGS.
It will be described based on. First, in the drawing, 1 is a curtain, 2 is a runner, and 3 is a curtain rail. The runner 2 includes a main body 2a and a hook 2b. The curtain 1 is hung on the hook 2b, and the coils 4a, 4b, 4 are attached to the main body 2a.
c, photosensors 6a, 6b, 6c, sliding contacts 11a,
11b, an electric circuit 12 and a rectifying circuit 13 are provided.
The runner 2 is slidably supported by the curtain rail 3.

The coils 4a, 4b, 4c and the photosensors 6a, 6b, 6c are arranged at equal intervals, and the emitting direction of the infrared beam emitted by the photosensors 6a, 6b, 6c is a light-dark pattern which will be described later. It is set on the side facing 7.

Further, the curtain rail 3 is provided with the runner 2 described above.
Has a hollow shape in which a groove 3a for inserting the hook 2b is formed over the entire length, and the inner surface 3 on one side sandwiching the groove 3a is formed.
The magnets 5 are attached to b at equal intervals, and the inner surface 3c on the other side
The light-dark pattern 7 in which the light portions 7a and the dark portions 7b are arranged at equal intervals is attached. The bright and dark pattern 7 is printed on a member such as a film or a printed circuit board. A pair of sliding paths 8a and 8b are provided along the light-dark pattern 7, and the sliding contacts 11a and 11b of the runner 2 are in sliding contact with each other.

The photosensors 6a, 6b, 6c are composed of, for example, photointerrupters, and emit an infrared beam to the light / dark pattern 7, and detect the bright portion 7a and the dark portion 7b by the presence or absence of the reflected light. Incidentally, the infrared beams emitted from the photosensors 6a, 6b, 6c are reflected by the bright portion 7a and are not reflected by the dark portion 7b.

The electric circuit 12 includes a control circuit 12a,
Input circuit 12b, timer circuit 12c and output circuit 12d
It has. More specifically, the control circuit 12a is configured by, for example, a microcomputer or a logic circuit (not shown), the input circuit 12b is connected to the input end 12g, the timer circuit 12c is connected to the output end 12h, and the curtain closing is performed. One sliding contact 11a is connected to the terminating end 12e, and the other sliding contact 11b is connected to the curtain opening end 12f. Further, the input circuit 12b includes the photo sensors 6a and 6a.
It is a circuit for waveform shaping the light and dark pattern detection signals from b and 6c. The timer circuit 12c is a circuit for closing the signal path between the control circuit 12a and the output circuit 12d for a certain period of time after the switch 9 is operated. For example, an existing one-shot multivibrator and an analog switch are used. The circuit is formed by combining them. The output circuit 12d is a circuit for exciting the coils 4a, 4b, 4c with a signal derived from the timer circuit 12c, and a switch circuit is formed by elements such as transistors.

The electric circuit 12 and the sliding contacts 11a, 1
A rectifier circuit 13 is connected between the rectifier circuit 1b and 1b. The rectifier circuit 13 includes four diodes 13a, 13b, 13c, 1
The circuit is configured by 3d. More specifically, the first diode 13a has an anode on one sliding contact 11a.
Side, and the cathode is connected to the positive side of the electric circuit 12. The second diode 13b has an anode connected to the negative electrode side of the electric circuit 12 and a cathode connected to one sliding contact 11a side. Furthermore, the third diode 13
In c, the anode is connected to the other sliding contact 11b side, and the cathode is connected to the positive electrode side of the electric circuit 12. Furthermore, the fourth diode 13d has an anode connected to the negative electrode side of the electric circuit 12 and a cathode connected to the other sliding contact 11b side.

The switch 9 has a neutral position, a curtain open position where the movable contact pieces 9a and 9b are connected to the fixed contacts 9c and 9d, and a curtain closed position where the movable contact pieces 9a and 9b are connected to the fixed contacts 9e and 9f. The switch is provided with three operating positions, and is provided at a desired location such as a door or a console in the vehicle compartment that is easily operated by an occupant of the vehicle. And
Fixed contacts 9c, 9f on the sliding path 8b, fixed contacts 9d, 9
e is connected to the sliding path 8a, the movable contact piece 9a is connected to the positive electrode side of the DC power supply 10, and the movable contact piece 9b is connected to the negative electrode side of the DC power supply 10.

The electric circuit 12 includes the photo sensor 6
a function of deriving an excitation signal to the coils 4a, 4b, 4c so that the polarities of the coils 4a, 4b, 4c become the first side when receiving the detection signal of the bright portion 7a from a, 6b, 6c, On the contrary, it has a function of deriving an excitation signal to the coils 4a, 4b, 4c so that the polarities of the coils 4a, 4b, 4c become the second side when the detection signal of the dark portion 7b is received.

For example, in the state shown in FIG. 1, the photosensors 6a and 6c detect the dark portion 7b.
In this state, the electric circuit 12 passes through the output circuit 12d so that the one ends a and e of the coils 4a and 4c are N poles and the other ends b and f are S poles.
An excitation signal is applied to a and 4c. In addition, the photo sensor 6
b detects the bright portion 7a. In this state, the electric circuit 12 supplies the excitation signal to the coil 4b through the output circuit 12d so that the one end c of the coil 4b becomes the S pole and the other end d becomes the N pole.

Next, the operation of the above embodiment will be described.
First, when the occupant of the vehicle operates the switch 9 from the neutral position to the curtain open position in order to open the curtain 1, the movable contact piece 9a is connected to the fixed contact 9c and the movable contact piece 9b is connected to the fixed contact 9d. Then, a positive electrode potential is applied to the positive electrode side of the electric circuit 12 from the sliding path 8b via the other sliding contact 11b and the third diode 13c of the rectifying circuit 13, and also from the sliding path 8a to the one sliding contact 11a and the rectifying circuit. Circuit 13
A negative electrode potential is applied to the negative electrode side of the electric circuit 12 via the second diode 13b. At the same time, the positive electrode potential is applied to the curtain open end 12f of the control circuit 12a of the electric circuit 12. As a result, the control circuit 12a causes the photo sensor 6a,
The bright and dark pattern detection signals are input from 6b and 6c, and the coils 4a and 4 are used to generate magnetic force lines having polarities corresponding to the signals.
An excitation signal is applied to b and 4c. This allows the coil 4
A magnetic force, that is, an attractive force and a repulsive force are generated between a, 4b, 4c and the magnet 5, and the runner 2 is biased toward the open side to open the curtain 1. Then, when the switch 9 is returned to the neutral position or when the time set by the timer circuit 12c elapses, the energized state of the runner 2 is released.

Next, the occupant of the vehicle operates the switch 9 from the neutral position to the curtain closing position in order to close the curtain 1. Then, similarly to the above, the movable contact piece 9a is fixed to the fixed contact 9e.
The movable contact piece 9b is connected to the fixed contact 9f. Then, a positive electrode potential is applied to the positive electrode side of the electric circuit 12 from the sliding path 8a via the one sliding contact 11a and the first diode 13a of the rectifying circuit 13, and from the sliding path 8b to the other sliding contact 11b and the rectifying circuit. Fourth diode 13d of circuit 13
A negative electrode potential is applied to the negative electrode side of the electric circuit 12 via. At the same time, a positive electrode potential is applied to the curtain closing end 12e of the control circuit 12a of the electric circuit 12. As a result, the control circuit 1
2a inputs the light-dark pattern detection signal from the photosensors 6a, 6b, 6c, and energizes the coils 4a, 4b, 4c with the excitation signal so as to generate a magnetic force line having a polarity corresponding to the signal. In this case, the directions of the excitation signals that energize the coils 4a, 4b, 4c have a phase opposite to that of the directions of the excitation signals when the curtain 1 is opened. As a result, a magnetic force is generated between the coils 4a, 4b, 4c and the magnet 5, the runner 2 is biased toward the closing side, and the curtain 1 is closed. Then, when the switch 9 is returned to the neutral position or when the time set by the timer circuit 12c elapses, the energized state of the runner 2 is released.

[0019]

EFFECTS OF THE INVENTION Since the present invention has the aforesaid constitution and operation, unlike the prior art, there is little risk of malfunction due to an external magnetic field, and not only does arc not generate an electromagnetic noise source, but it is also necessary to use a flexible cord. There is no effect.

[Brief description of drawings]

FIG. 1 is an electrical block diagram showing a preferred embodiment of the present invention.

FIG. 2 is an exploded perspective view partially showing a main part of the embodiment shown in FIG.

[Explanation of symbols]

 1 Curtain 2 Runner 3 Curtain Rail 4a, 4b, 4c Coil 5 Magnet 6a, 6b, 6c Photosensor 7 Bright / dark pattern 8a, 8b Sliding path 9 Switch 10 DC power supply 11a, 11b Sliding contact 12 Electric circuit 13 Rectifying circuit

Claims (3)

[Claims] 1. A runner (2) for hanging a curtain (1) and a curtain rail (3) slidably supporting the runner (2), and the runner (2).
Is provided with a coil (4a, 4b, 4c) and a photo sensor (6a, 6b, 6c) for detecting the position of the runner (2), and the curtain rail (3) has a magnet (5) and a photo sensor (6a, 6b). , 6c) and a light-dark pattern (7) facing each other, and a magnetic force generated between the coils (4a, 4b, 4c) and the magnet (5) urges the runner (2). In the opening / closing device, sliding paths (8a, 8b) along the light-dark pattern (7)
And a switch (9) for opening and closing the curtain between the slide paths (8a, 8b) and the DC power supply (10), and the electric circuit (12) and the slide contact () of the runner (2). 1
A curtain opening / closing device in which a rectifier circuit (13) is provided between the sliding contacts (11a, 11b) and sliding contacts (11a, 11b). 2. The invention according to claim 1, wherein the sliding path (8a, 8b) and the sliding contact (11a, 11)
A curtain opening / closing device having a plurality of b) and the switch (9) having a plurality of movable contact pieces (9a, 9b). 3. The invention according to claim 2, wherein there are a pair of sliding contacts (11a, 11b), an anode is connected to one sliding contact (11a) side, and a cathode is connected to the positive side of the electric circuit (12). First diode (13a) connected to
And a second diode (13b) in which a cathode is connected to one sliding contact (11a) side and an anode is connected to a negative electrode side of the electric circuit (12), and an anode is connected to the other sliding contact (11b) side. A third diode (13c) having a cathode connected to the positive side of the electric circuit (12), a cathode connected to the other sliding contact (11b) side, and an anode connected to the negative side of the electric circuit (12). A rectifying circuit (13) is constructed with four diodes (13d), one sliding contact (11a) side is connected to the curtain closing end (12e) of the electric circuit (12), and the other sliding contact (11e) is connected. A curtain opening and closing device in which the 11b) side is connected to the curtain open end (12f).