JPH0325186A - Blind - Google Patents

Abstract

PURPOSE:To shut out the direct rays of the sun and to make it possible to control a blind in a state to keep maximum lightness by comparing the illumination of the output of two or more optical sensors provided upon slats or into a lower box to open and shut the slats. CONSTITUTION:A stepping motor 8 is provided to the inside of a window frame 3, and an output shaft of the stepping motor 8 is connected to a rotary shaft 6 through a flexible joint 9. Control strings 10 for controlling a blind 1 are operated manually to connect to the rotary shaft 6 through the stepping motor 8. Optical sensors 11 and 12 are fixed to the slats 4 supported by hanging strings 5 and 5, and the output of the optical sensors 11 and 12 is transmitted to the inside of the window frame 3 to compare their illumination. Furthermore, the stepping motor 8 is driven and controls so a to locate it in such a position that the direct rays of the sun is on the optical sensor 11 and that the direct rays of the sun is not on the optical sensor 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blind that blocks direct light and can be controlled to the brightest state at that time.

[Conventional technology: An example of a dimming device using conventional blinds is disclosed in Japanese Patent Application Laid-open No. 1983
As described in Japanese Patent Publication No. 14<5992, there was a system in which the degree of opening and closing of blinds was controlled using a light sensor placed indoors to achieve a preset amount of light.

[Problem to be solved by the invention] However, with conventional blind-based light control devices, the amount of light is controlled to a preset amount regardless of the height and brightness of the sun, and at that point, direct light is blocked. It was not possible to obtain the maximum brightness under the conditions.

The present invention has been made to solve the above problems, and its purpose is to provide a blind that blocks direct light and controls the brightness to be the brightest at that time.

[Means for Solving the Problems] The blind of the present invention compares the outputs of at least two optical sensors provided on the top or bottom of the slats using an illuminance comparison section, and controls the blind driving means for opening and closing the slats. It is characterized by

[Embodiments] Examples of the blinds of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of an embodiment of the present invention. 1 is a blind that adjusts the lighting of the window, and this blind 1 is suspended from the upper part of the window frame 3.

A large number of slats 4 are arranged at predetermined intervals, and these slats 4 are supported by suspension strings 5.5 at two locations on the left and right sides of the slats 4.

Although not shown, the hanging cords 5 are located on both the front and back sides of the slat 40, and as the rotating shaft 60 rotates, one hanging cord 5 is lowered and the other is raised, thereby changing the angle of the slat 40.

Reference numeral 7 denotes a lower box provided at the lower ends of the hanging cords 5, 5, and this lower box 7 serves as a weight for stabilizing the blind 1.

8 is a stepping motor provided in the window frame 5, and the output shaft of this motor 7 is connected to the rotating shaft 6 via a flexible joint 9, and the driving of this motor 8 causes the rotating shaft 6 to is rotated at low speed.

10 is an operating string for manually operating the blind 1, and when the operating string 10 is dry, the motor 5 is connected to the rotating shaft 6.
connected via.

Note that 14 is a bearing that supports the rotating shaft 6, and 15 is a support plate that supports this bearing 15.

Reference numerals 11 and 12 denote optical sensors, which are fixed to the Surasoto 4 as shown in FIG. Information from the optical sensor 1112 is sent to the central control unit 13 provided within the window frame 5.
The illuminance comparison section drives the stepping motor 7,
Direct sunlight hits the optical sensor 11, and the optical sensor 12
Control the area so that it is not exposed to direct sunlight.

In addition, since the illuminance of direct sunlight is different in summer and winter, it is good to be able to change the setting value of the illuminance comparison section of the central control section 15 so that it can be set in advance.Also, when clouds pass in front of the sun, the content Therefore, when the illuminance falls below a certain value, it is more practical to lock the rotation of the blinds or switch to manual operation.

As for the position of the optical sensors, the optical sensor 12 that is not exposed to direct sunlight may be located near the end of the slat 4, and the optical sensor 11 that is exposed to direct sunlight may be located in front of the center of the slat 4.

Furthermore, it does not have to be on the slats, but may be provided on the lower case 7 as long as it is in a position that is exposed to light.

FIG. 2 is a diagram showing a light sensor fixed to a slat.

1...Blind 8...
...Motor 11.12...More than optical sensor [Effects of the invention] According to the blind of the present invention shown above, direct light is blocked even if the height of the sun changes. , and can provide blinds that can be controlled to the brightest condition at that time.

Claims (1)

[Claims] A blind characterized in that an illuminance comparison section compares the outputs of at least two optical sensors provided on the top of the slat or on the bottom case to control a blind driving means for opening and closing the slat.