JP4926802B2 - Movable switchgear - Google Patents

Description

  The present invention relates to a movable opening / closing device having a liquid crystal panel such as instantaneous light control glass, and in particular, a door portion (opening / closing portion main body) and a frame member are connected by a hinge, and a flexible member disposed near the hinge. The present invention relates to a movable switchgear suitable for preventing an electric shock due to insulation deterioration in an electric wire or a transformer.

Conventionally, there has been known a liquid crystal panel capable of instantaneously switching between transparent / opaque by applying / cutting off a voltage (see, for example, Patent Document 1).
As shown in FIG. 4, the liquid crystal panel includes two liquid crystal plates 110 that are entirely covered with an insulating film (insulating layer) 120, sandwiched between transparent electrodes 130 from both sides, and sufficiently thick to withstand external force. The structure is sandwiched between transparent glass plates 140. In the normal state, the liquid crystal plate 110 is opaque, but becomes transparent when a voltage is applied between the transparent electrodes.
This liquid crystal panel 100 already has some practical examples such as window glass and partition screens.

Some of these liquid crystal panels operate at a low voltage (24 V or less) where the applied voltage has no risk of electric shock. However, since the cloudiness when opaque when no voltage is applied is low, it is not suitable for use in a bathroom or the like where high opacity is required. Further, when viewed from an oblique direction, there is a problem that transparency is lowered or an image is difficult to see.
In addition, the low voltage type liquid crystal operates at a low voltage of several volts, but since the orientation of the liquid crystal is rotated by applying a voltage, it is necessary to use a polarizing filter in combination, and the transparency at the time of applying the voltage is low. There was an inconvenience of halving.

On the other hand, a liquid crystal operating at high voltage is opaque in a random orientation when no voltage is applied, but becomes transparent by being oriented perpendicular to the same panel surface as the electric field direction when a voltage is applied. Therefore, a polarizing filter or the like is not necessary and the transparency is good.
Japanese Patent No. 3512373

However, the conventional liquid crystal panel that operates at a high voltage has a problem in that sufficient measures for preventing electric shock are not taken.
For example, when a liquid crystal panel is used for the door portion, the wiring for supplying power to the liquid crystal panel passes near the hinge of the door portion. The wiring repeatedly bends and stretches as the door is opened and closed, but even if a flexible flexible electric wire is used for the wiring, there is a risk of failure such as disconnection or insulation film peeling. In particular, when a liquid crystal panel is used for a door portion of a bathroom or the like that is a water field, the risk of electric shock increases.

In addition, there is a type in which a safety insulation transformer is connected to a wiring for supplying power to the liquid crystal panel. A safety insulation transformer refers to an insulation transformer that complies with safety standards such as EN, UL, and JIS. This safety insulation transformer includes a metal shield plate between the primary winding and the secondary winding, and by grounding it, safety can be maintained even in the event of insulation degradation.
Here, in order to maintain safety equivalent to that of the safety insulation transformer and to maintain safety even if the hinge part (movable part) is damaged in the electric wire, it is relayed at a low voltage (for example, 24V). Although it is conceivable to use a liquid crystal that operates at a low voltage, in this case, the low-voltage liquid crystal has a problem of insufficient privacy because it has low opacity when the voltage is cut off.

  The present invention has been considered in view of the above circumstances, and a liquid crystal panel that can improve safety by taking sufficient measures to prevent electric shock against leakage due to insulation deterioration or the like, and has sufficient opacity. An object of the present invention is to provide a movable switchgear that can be used.

In order to achieve this object, a movable opening / closing device of the present invention includes an opening / closing part main body having a liquid crystal panel, a frame member for supporting the opening / closing part main body, and a hinge for attaching the opening / closing part main body to the frame member so as to be openable / closable. A primary transformer attached inside or outside the frame member, a booster attached inside or outside the switch body, and the primary transformer and the booster. comprising a flexible wire which, an operation switch for switching the transparent / opaque liquid crystal panel, a primary transformer, and the transformer power supply voltage input to a low voltage, booster boosts the low voltage from the primary transformer The voltage applied to the liquid crystal panel and applied to the flexible wire is set to a low voltage, and the operation switch is connected to the low voltage side of the booster between the primary transformer and the booster .

When the movable opening / closing device has such a configuration, the voltage passing through the vicinity of the hinge can be set to a low voltage without risk of electric shock, and thus safety can be maintained.
Furthermore, since the high voltage of the secondary transformer can be supplied to the liquid crystal panel in a floating manner, safety can be further improved.

In addition, a liquid crystal panel that operates with a high voltage boosted by a secondary transformer can be used. This high voltage liquid crystal panel has high opacity when the voltage is cut off, so that sufficient privacy can be protected.
In addition, by making it possible to use a liquid crystal panel that operates at a high voltage, it is possible to solve problems that the liquid crystal panel that operates at a low voltage, for example, a decrease in transparency when viewed from an oblique direction and an image that is unclear.

Further, when the movable opening / closing device has such a configuration, the liquid crystal panel can be switched between transparent and opaque by operating the switch.
Moreover, the voltage passing through the vicinity of the hinge is a low voltage, the low voltage side of the primary transformer is grounded together with the frame member etc., and the high voltage of the secondary transformer can be supplied to the liquid crystal panel in a floating manner, so the safety is high, In addition, it is possible to provide a movable opening / closing device for a liquid crystal panel with high opacity.

Moreover, the movable switchgear of this invention can be set as the structure by which the low voltage side of the primary transformer was earth | grounded with the frame member and / or the switch part main body.
If the movable switchgear has such a configuration, the leakage current due to insulation deterioration between the windings of the primary transformer can be released to the ground by grounding one side of the low voltage of the primary transformer. Thereby, an electric shock can be prevented.

Moreover, the movable switchgear of this invention can be set as the structure whose low voltage is 25V or less.
If the movable opening / closing device has such a configuration, the voltage passing through the hinge portion can be set to a low voltage without risk of electric shock.

As described above, according to the present invention, safety can be maintained by setting the voltage passing through the hinge portion to a low voltage without risk of electric shock.
In addition, by grounding one side of the low voltage of the primary transformer, leakage current due to insulation deterioration between the windings of the primary transformer can be released to the ground.
Furthermore, by supplying the high voltage of the secondary transformer to the liquid crystal panel in a floating manner, these triple safetys can be obtained.

And since the low voltage passing near the hinge is boosted by the secondary transformer, a liquid crystal panel that operates at a high voltage of AC 100 V or higher can be used. Since this high voltage type liquid crystal panel has high opacity, sufficient privacy can be ensured.
In addition, by making it possible to use the high voltage type liquid crystal panel, various problems of the low voltage type liquid crystal panel can be solved.

  Hereinafter, a preferred embodiment of a movable opening and closing device according to the present invention will be described with reference to the drawings.

First, an embodiment of the movable opening and closing device of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a front view showing an external configuration of the movable switchgear according to the present embodiment, and FIG. 2 is a cross-sectional view (a cross-sectional view taken along line AA in FIG. 1) showing the vicinity of the hinge portion in an enlarged manner.

As shown in FIG. 1, the movable opening / closing device 1 includes a door portion (opening / closing portion main body) 10, a frame member 20, and a hinge 30.
Here, the door unit 10 includes a liquid crystal panel 11 and a door frame 12.
As shown in FIG. 4, the liquid crystal panel (instant light control glass) 11 is formed by laminating a liquid crystal plate, an insulating layer, a transparent electrode, and a plate glass. In addition, a conventionally well-known arbitrary suitable liquid crystal panel can be used. For this reason, the detailed description about a liquid crystal panel is abbreviate | omitted.

The door frame 12 is a member that serves as a frame or a partition of the door unit 10, and is a bridge that bridges the vertical rack portion 13 composed of a right vertical frame and a left vertical frame, and the left and right vertical rod sections 13. San) part 14.
In addition, this door frame 12 is not restricted to comprising only the standing-up part 13 and the crosspiece 14, but can include a kumiko part that bridges two or more crosspieces 14, for example. Then, the liquid crystal panel 11 is fitted in a place surrounded by the upright portion 13, the crosspiece 14, and the braided portion.

As described above, the vertical rod 13 has the right vertical frame and the left vertical frame. Of these, the inner rod member 13-1 is attached to the hinge portion 30, and the other is the outer rod member 13-. 2.
As shown in FIG. 2, the inner flange member 13-1 has a hollow portion, and a secondary transformer (boost) 43, an operation switch 44, and the like are attached to the hollow portion. Details of the secondary transformer 43 and the operation switch 44 will be described later.
Further, the inner collar member 13-1 has a fitting notch 13-11 (or a fitting recess) formed on a side surface into which the liquid crystal panel 11 is fitted. When the liquid crystal panel 11 is fitted in the fitting notch 13-11, a buffer / sealing rubber 13-12 is fitted between the end of the notch 13-11 and the liquid crystal panel 11. As a result, the liquid crystal panel 11 is fixed, and it is possible to prevent dust and water droplets from entering the cavity.

  The frame member 20 is a frame that supports the door unit 10. The frame member 20 includes vertical frame members 21 and 22 and a duck member 23, and a hinge 30 is attached to one vertical frame member 21. A vertical frame member (hinge frame member) 21 to which the hinge 30 is attached has a hollow portion, and a primary transformer 41 is attached to the hollow portion.

  The primary transformer 41 can also be attached to the outside of the hinge frame member 21. Attaching to the outside includes attaching directly to the side surface of the hinge frame member 21 and attaching it near the hinge frame member 21 while being separated from the hinge frame member 21. As described above, when the primary transformer 41 is attached to the outside of the hinge frame member 21 and the door portion 10 is installed in a water field such as a bathroom, it is desirable that the primary transformer 41 be a waterproof type.

The primary transformer 41 is a highly insulating transformer that steps down the power supply voltage from the outside to a safe low voltage. Specifically, the power supply voltage (AC 100V) is transformed to a low voltage (24V). As shown in FIG. 3, the low-voltage one-side terminal is grounded together with the hinge frame member 21 and the inner flange member 13-1. Thereby, the leakage current due to the insulation deterioration between the windings of the primary transformer 41 can be released to the ground.
Further, by using an insulating transformer as the primary transformer 14, the liquid crystal panel 11 can be protected from lightning surge.

A part of the flexible wire 42 is a wire that connects the low voltage side of the primary transformer 41 and the low voltage side of the secondary transformer 43, and can be bent and extended at a hinge portion (near the hinge 30). Has been placed.
The other part of the flexible electric wire 42 is an electric wire drawn from the low-voltage one-side terminal of the primary transformer 41, and is slackened inside the inner flange member 13-1 of the door portion 10. Has been drawn. The inner flange member 13-1 is grounded by this lead-in wire.

The secondary transformer 43 boosts the low voltage sent via the flexible wire 42 to a voltage necessary for the liquid crystal panel 11 to operate. Specifically, the secondary transformer 43 transforms a low voltage (24V) to, for example, 100V.
Thus, by supplying the high voltage output of the secondary transformer 43 to the liquid crystal panel 11 in a floating manner, safety can be further improved. In addition, since a high-voltage liquid crystal panel can be used, the opacity increases and privacy can be sufficiently protected.

  In addition, although the secondary transformer 43 is attached inside the inner collar member 13-1 in FIG. 2, it is not restricted to an inside but can also be attached outside. Here, attaching to the outside includes directly attaching to the side surface of the inner flange member 13-1, and attaching to the side surface of the inner flange member 13-1 although being separated from the inner flange member 13-1. As described above, when the secondary transformer 43 is attached to the outside of the inner casing member 13-1, and the door unit 10 is installed in a water field such as a bathroom, the secondary transformer 43 is waterproof. It is desirable.

  The operation switch 44 is a switch for switching between transparent and opaque of the liquid crystal panel 11, and is connected to the low voltage side of the secondary transformer 43 as shown in FIG. Since the operation button 44-1 of the operation switch 44 protrudes to the outside of the inner collar member 13-1, the user can operate it from the room.

Next, the operation of the movable opening / closing device of this embodiment will be described with reference to FIG.
When the operation switch 44 is OFF, the liquid crystal panel 11 is opaque.
When the operation switch 44 is switched to ON, the primary transformer 41 transforms the power supply voltage (AC 100 V) to a low voltage (24 V) and outputs it. This low voltage (24V) is applied to the secondary transformer 43 via the flexible wire 42.
In the secondary transformer 43, the low voltage (24V) is transformed to a voltage (100V) at which the liquid crystal panel 11 operates and output. The output voltage (100 V) is applied, and the liquid crystal panel 11 becomes transparent.

As described above, according to the movable opening / closing device of the present embodiment, safety can be maintained by setting the voltage passing through the hinge portion to a low voltage without risk of electric shock.
Also, by grounding the low voltage side of the primary transformer, leakage current due to insulation deterioration between the windings of the primary transformer can be released to the ground.
Furthermore, triple safety can be achieved by supplying the high voltage of the secondary transformer to the liquid crystal panel in a floating manner.

The preferred embodiment of the movable switchgear according to the present invention has been described above. However, the movable switchgear according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. Needless to say.
For example, in the above-described embodiment, the door portion is described as an example of the opening / closing portion main body. However, the opening / closing portion main body is not limited to the door portion, and can include a fitting such as a window that can be opened and closed by a hinge.

Moreover, although the power supply of a liquid crystal panel can use a general household power supply, it is not restricted to this, For example, a battery power supply can also be used.
Further, in the above-described embodiment, the secondary transformer is exemplified as the booster. However, the booster is not limited to the secondary transformer, and may be configured by an inverter booster circuit using a semiconductor element, for example. it can.
Further, the liquid crystal panel has a problem that if the switch is turned off in a state where a voltage is applied, the electric charge remains in the liquid crystal panel for a while and does not become opaque immediately. Therefore, a circuit for discharging the residual voltage can be connected.

  Since the present invention relates to a power supply circuit for a liquid crystal panel, the present invention can be used for a building or an apparatus in which the liquid crystal panel is used.

It is a front view which shows the external appearance structure of the movable opening / closing apparatus of this invention. It is sectional drawing which shows the structure of hinge vicinity. It is a circuit diagram which shows the structure of the circuit which supplies a power supply voltage to a liquid crystal panel. It is sectional drawing which shows the structure of the conventional liquid crystal panel.

Explanation of symbols

1 Movable opening / closing device 10 Door part (main part of opening / closing part)
DESCRIPTION OF SYMBOLS 11 Liquid crystal panel 12 Door frame 13 Standing-up part 14 Crosspiece 20 Frame member 21 Vertical frame member (hinge frame member)
22 Vertical frame member 23 Kamoi member 30 Hinge 41 Primary transformer 42 Flexible electric wire 43 Secondary transformer (booster)
44 Operation switch

Claims (3)

A movable opening / closing device comprising an opening / closing part main body having a liquid crystal panel, a frame member supporting the opening / closing part main body, and a hinge for attaching the opening / closing part main body to the frame member so as to be opened and closed,
A primary transformer attached inside or outside the frame member;
A booster attached to the inside or outside of the opening / closing part body;
A flexible electric wire connecting the primary transformer and the booster ;
An operation switch for switching between transparent and opaque of the liquid crystal panel,
The primary transformer transforms the input power supply voltage to a low voltage,
The booster boosts the low voltage from the primary transformer and supplies the boosted voltage to the liquid crystal panel .
The voltage applied to the flexible wire is the low voltage,
The movable switchgear characterized in that the operation switch is connected to the low voltage side of the booster between the primary transformer and the booster . The movable switchgear according to claim 1, wherein the low voltage side of the primary transformer is grounded together with the frame member and / or the switch body. The low voltage is 25V or less
The movable opening and closing device according to claim 1 or 2.

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