JPH0417811A - Linear motor-driven curtain - Google Patents

Abstract

PURPOSE:To improve the external appearance of the title curtain on design and to improve the fitting and maintainability of a curtain rail by providing a linear motor composed of both a stator provided within the curtain rail and a movable member which faces the stator and to which driving force is applied by electromagnetic force. CONSTITUTION:On the upper surface of the inside of a curtain rail 10, a stator 12 on which N-poles and S-poles are alternately magnetized at regular intervals is fixed through a yoke 11, and on the inside of the lower surface of the curtain rail 10, electric current ways 13 are provided along the movement direction of a movable member 20. The movable member 20 has a base plate 4 and wheels 5, 7 for which two wheel assemblies, one wheel assembly consists of two wheels, are separately located in front and in rear of the base plate 4, and each of these wheel assemblies is connected through a rotary shaft and moved on the surface of the electric current ways 13. At the same time, these wheels receive electric power and the electric power is supplied to a control circuit through wheel supports 6, 8. On the surface of the base plate 4, three driving coils la, lb, lc, a drive IC having a drive circuit within it, a microcomputer 3 for the control circuit, and hall elements H1, H2 for detecting the magnetism of the stator 12 are located, and the movable member moves by causing electromagnetic force thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of an electric curtain that uses a linear motor as a drive source to automatically open and close the curtain.

``Prior Art'' There is an electric curtain device that automatically opens and closes a curtain attached to a window or the like.

Usually, a curtain has a structure in which a plurality of movable curtain support parts are provided inside a groove of a rail extending in the longitudinal direction, and the upper end of the curtain is suspended from these parts. The curtain is opened and closed by moving one end of the curtain along the rail.

The electric curtain device is roughly divided into a drive section provided at both ends or one end of the rail, and a rail section that guides the opening/closing operation of the curtain.

The drive unit includes an induction motor, and a rotating body that applies the rotational force necessary to open and close the curtain via a speed reduction mechanism above the motor. A chain, a string, or the like is connected to this rotating body, and one end of the chain or string is connected to an end of a curtain rail support that is held within the rail portion so as to be linearly movable.

In the operation of the electric motor, for example, when a signal for opening a curtain is given to the drive section, the induction motor rotates in a predetermined direction, and a chain or string connected to the induction motor moves in a fixed direction along a rail. Along with this,
A curtain support connected to a chain or the like moves in the opening direction along the rail, and the curtain is opened. Further, when a signal to close the curtain is given, the curtain is closed by the operation opposite to the above.

[Problem to be solved by the invention] However, in the conventional electric curtain as described above,
Since the drive part protrudes outside the rail, there are problems in that it spoils the external design and imposes restrictions on installation and other construction. In addition, chains and cords are installed inside the rails, which require maintenance such as oiling, and there are also problems such as noise and disconnection. Furthermore, when installing the electric curtain, the electric motor and the rail part are separated during installation, so there is a problem that it is difficult for the purchaser to install the electric curtain himself.

Therefore, the present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a linear motor curtain in which the rail part and the driving part of the curtain are integrally constructed, and which is easy to install and maintain. shall be.

[Means for Solving the Problems] The linear motor curtain according to the present invention includes stators that are magnetized to different magnetisms alternately at a constant pitch along the longitudinal direction of the curtain rail, and a state in which one end of the curtain is suspended. and a movable body that moves along the longitudinal direction of the curtain rail. The movable body further includes at least two drive coils provided at positions facing the stator at a predetermined distance, a detection means for detecting a change in the magnetization of the stator, and a detection means. The present invention is characterized in that it includes a control means for controlling the direction of the current flowing through the drive coil in accordance with the magnetic change of the stator detected by.

[Function] The linear motor curtain according to the present invention includes, inside the rail, a stator extending along the longitudinal direction of the rail, and a movable body facing the stator and movable along the rail. It constitutes a near motor that moves by inducing a predetermined electromagnetic force. Therefore, almost all of the driving parts of the curtain are installed inside the rail, and the driving parts are prevented from protruding to the outside of both ends of the rail.

[Example 1] An example of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall structural diagram of a linear motor curtain according to the present invention, and FIG. 2 is a diagram showing the cutting line
It is a cross-sectional structure diagram taken from a direction along -■. Referring to both figures, the linear motor curtain includes a long curtain rail 10 that is attached to the upper part of a window frame, a plurality of curtain hanging fittings 30 that hang the curtain, and slidably move inside the curtain rail 10. and a curtain opening/closing movable body 20 that hangs and supports one end of the curtain and automatically runs inside the curtain rail 10. The curtain 18 is suspended by a runner hook 17 fixed to the lower surface of the curtain hanging fitting 30 and the curtain opening/closing movable body 20.

The curtain rail 10 is constituted by an elongated body having a hollow rectangular cross section and having an opening at the bottom in the attached state. A stator (magnetic material) 12, in which north poles and south poles are alternately magnetized at a constant pitch, is fixed to the inner upper surface of the curtain rail 10 via a yoke 11 such as an iron plate. York 11
is provided to reduce magnetic resistance. Furthermore, an electric path 13 made of a conductor for supplying power to the movable body 20 is provided inside the lower surface of the curtain rail 10 along the moving direction of the movable body 20 .

Next, the structure of the curtain opening/closing movable body 20 will be explained using FIG. 3. FIG. 3 shows a structural perspective view of the movable body 20. The movable body 20 includes a base plate 4 and two wheels 5.7 rotatably attached to the front and rear of the base plate 4. - The sets of wheels are connected to both ends of the base plate 4 via one rotating shaft. The wheel 5.7 rotates over the surface of the electric line 13 of the curtain rail 10 and at the same time receives an electrical power supply from this electric line 13. The wheels 5.7 therefore consist of metal conductors. Also, - set of wheels 5.5.
A wheel support 6.8 is provided between the wheels 5.7 and the electric power supplied from the electric line 13 is supplied to the control circuit via the wheel 5.7 and this wheel support 6.8. In addition, −
The sets of wheels 5.5 are electrically insulated from each other. Fourth
Figures (a) and (b) are cross-sectional structural views showing a separated state between a pair of wheels. The insulation structure is constructed by interposing an insulator 9 between one wheel 5.7 and the rotating shaft. Electrical short circuits can be prevented by using different wheels to insulate the front wheels (FIG. 4(a)) and the rear wheels (FIG. 4(b)).

Referring again to FIG. 3, on the surface of the board 4 are three drive coils 1a s 1 b s 1 c, a drive IC with a built-in drive circuit, and a microcomputer that constitutes most of the control circuits. 3 and Hall elements H7 and H2 for detecting the magnetism of the stator 12 are arranged to form a predetermined circuit.

FIG. 5 shows a circuit block diagram of the linear motor curtain. The linear motor curtain circuit is connected to an external power source via an open/close switch that opens and closes the curtain. Electric power given from the connected power source is supplied to the electric line 13 by the operation of the on/off switch. Furthermore, electrical power is supplied to each part of the circuit via the wheels 5.7 of the movable body 20. The polarity of the power supplied to the power supply polarity determining circuit 14 is determined, and a curtain opening/closing signal is determined based on a change in polarity. The determination result is then input to the microcomputer 16.

Further, a power supply circuit 15 provided in parallel with the power supply polarity determination circuit 14 supplies power to each part with constant polarity through power supply from the electric line 13. In addition, Hall elements HI, H
2 detects changes in the magnetic field from the stator 12 caused by the movement of the movable body 20 and sends the information to the microcomputer 16.
Enter. The microcomputer 16 receives input of the power supply polarity from the power supply polarity determination circuit 14, and further receives information on changes in the magnetic field of the stator from the Hall elements H1 and H2.
A predetermined calculation is performed and drive signals O2.03 are output to the drive coils la, lb, and lc.

Drive signals O4-o3 are amplified through drive circuits D1, D2, and D3, and then sent to drive coils 1a-IC.

Next, drive coils 1a to 1c of stator 12 and rotating body 20
The arrangement relationship of Hall elements H, H2 will be explained. As shown in FIG. 2, the stator 12 and the drive coils 1a to 1c of the movable body 20 are arranged at positions facing each other with a predetermined distance therebetween. Furthermore, referring to FIG. 8(a), the stator 12 is magnetized with N poles and S poles alternately at a constant pitch.

Further, three drive coils 1a to IC each having a constant coil diameter are arranged facing the stator 12 at a predetermined pitch.

The relationship between the pitch of the stator 12 and the coil diameter of the drive coil is as follows: stator pitch: coil diameter = 3:4. Further, among the Hall elements H4 and H2 arranged on the upper surface of the movable body 20, one Hall element H7 is located at one-third of the stator pitch, and the other Hall element H2 is located at one-third of the stator pitch. It is placed at a position corresponding to position 2.

Next, we will discuss the operation of this linear motor curtain in the sixth section.
This will be explained using FIGS. 7A, 7B, and 8. FIG. 6 is a flowchart showing the operation of the linear motor curtain, FIGS. 7A and 7B are memory data diagrams read into the microcomputer 16, and FIGS. 8(a) to (g) are FIG. 3 is a schematic diagram schematically showing the operating state of the stator 12 and the movable body 20. FIG. First, when the opening/closing switch is operated and the switch is operated from the OFF state to the curtain opening direction, the microcomputer 16 performs a polarity check based on the signal input from the power supply polarity discrimination circuit 14, and if the switch is in the opening direction, the 7A Store the data shown in the figure. (In addition, if the direction is closed, the data shown in FIG. 7B is stored). Next, the signal from the Hall element is input to the microcomputer 16. Referring to FIG. 8(a), in the initial startup state, the Hall elements H7 and H2 are both at the S pole position, so the signals H1=S, H
2=S, and the drive signal O,=+,02=-10 for the drive coils 1a to IC according to the data in FIG. 7A.
3 = Current flows in ten directions.

A current flows in a predetermined direction in each of the drive coils 1a to IC from two directions, and a propulsive force F acts in the direction shown in the drawing between it and the magnetic force of the stator 12 according to Fleming's left-hand rule. As a result, the movable body 20 starts moving in the illustrated direction. When the movable body 20 moves to the position shown in FIG. 8(b), the Hall element H2 reaches a magnetic field insensitive position, and this Hall element H
The input from 2 is in the OFF state. Therefore, the signal H
1=S, H2=0, and from FIG. 7A, the drive signals O7 to 03 to the drive coil are O1=+, 0□=-Q3=current flows in one direction, and according to the change in the polarity of the stator 12. The current direction of the drive coil is changed, and the movement of the movable body 20 is maintained. Further, when the movable body 20 moves and reaches the position shown in FIG. 8(c), the input from the Hall element H2 becomes N, and the input from the Hall element H1 becomes OFF. In response to this input signal, the drive coils 1a to 1a to 03 are supplied to the drive coils in response to drive signals 01 to 03 determined from the data in FIG. 7A.
A current is passed through the IC in a predetermined direction. As a result, the opening/closing drive body 20 continuously performs the operation in the opening direction. below,
By the same action, the movable body 20 moves as shown in FIGS. 8(d) to 8(g).

Further, in the closing operation of the curtain, drive signals to the drive coils 1a to IC are determined according to the data shown in FIG. 7B, and the curtain is moved in the opposite direction to the opening operation.

Note that when the power is off, the movable body 20 is placed in the curtain rail 10 and is in a free state, so that it can be opened and closed manually like a normal curtain.

In the above embodiment, an example is shown in which the drive coil is composed of three coils, but the drive coil is not limited to this and may be composed of a plurality of coils. In addition, although an example of wheels configured as a one-to-one pair is shown as wheels for power feeding or running provided on the movable body 20, the present invention is not limited to this, and for example, a structure supported by one wheel is shown. It doesn't matter if it's from.

[Effects of the Invention] As described above, the linear motor curtain according to the present invention includes a stator provided in the curtain rail as a drive source for automatically opening and closing the curtain, and a movable body facing the stator and given a propulsion force by electromagnetic force. Since a structure using a linear motor consisting of the following is constructed, it is possible to eliminate a drive unit that is externally mounted on the curtain rail, improve the external design, and improve the ease of installation and maintenance of the curtain rail.

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram of a linear motor curtain according to an embodiment of the present invention. FIG. 2 is a cross-sectional structural diagram taken along the cutting line ■-■ in FIG. 1. Third
The figure is a structural perspective view of the movable body 20 of the linear motor curtain. FIG. 4 is a cross-sectional structural diagram of the vicinity of the wheel 5.7 of the movable body 20 shown in FIG. 3. FIG. 5 is a circuit block diagram of a linear motor curtain according to the present invention. FIG. 6 is a flowchart for explaining the operation of this linear motor curtain. Figures 7A and 7B are
FIG. 6 is a diagram of predetermined signal data read into the microcomputer of the linear motor curtain. Figures 8(a) to 8(g) show the stator and movable body 2 of the linear motor curtain.
FIG. In the figure, 1a to IC are drive coils, 2 is a drive I
3 is a microcomputer, 4 is a board, 5.7 is a wheel, 10 is a curtain rail, 12 is a stator, 13 is an electric circuit, and 20 is a movable body for opening and closing the curtain. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A curtain rail, a stator magnetized with different magnetism alternately at a constant pitch along the longitudinal direction of the curtain rail, and a stator that moves along the longitudinal direction of the curtain rail with one end of the curtain suspended. a movable body, and the movable body further includes at least two drive coils provided at positions facing the stator at a predetermined distance, and detects changes in magnetized magnetism of the stator. and a control means for controlling the direction of current flowing through the drive coil in accordance with a change in magnetism of the stator detected by the detection means.