JP2825692B2 - Screen structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflective screen structure.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional screen structure of this type. Reference numerals 1 and 2 denote two sets of rectangular pipes pivotally supported by an axis 3 between two pipes. While rotating about the axis, one is rotatably held by the screen film holding rod 5 by the axis 4, and the other is held rotatably by the axis 7 in the cabinet 6 which winds and stores the screen film. I have. Reference numeral 8 denotes a gas spring that serves to push up the screen film holding rod 5 vertically, and 9 denotes a screen film.

Next, the operation will be described. Normally, when a screen is not used, the screen membrane holding rod 5 is in contact with the upper part of the cabinet 6 by folding the pantograph-shaped pipes 1 and 2, and at this time, the gas spring 8 is in a contracted state. Next, when the screen is used, when the screen film holding rod 5 is lifted, the gas spring 8 is lifted.
Works and tries to push up. However, the gas spring 8 in the housed state has a small movement compared to the size of moving the screen upward, so that a sufficient lifting force does not work.
The gas spring 8 is effective when the screen film holding rod 5 is located above the middle of the vertical space, and when it is located above that, the screen film 9 and the screen holding rod 5, the pipes 1, 2, etc. The weight results in a drop in the direction of the cabinet 6.

[0004]

In the conventional screen structure, when the screen is lowered to accommodate the screen as described above, a force in a falling direction acts from the middle and a dangerous state is created.
It was necessary to prevent this sudden drop.

The present invention has been made to eliminate the above-mentioned drawbacks, and provides a structure which can be used safely without abruptly dropping a screen film holding rod.

[0006]

A screen structure according to the present invention has a structure in which upper and lower ends of a pipe formed in a pantograph shape are horizontally moved by a guide.
This horizontal movement can be controlled by a spring.

[0007]

With the screen structure according to the present invention, when the screen holding rod is lower than the middle, the spring force acts on the gas spring in addition to the gas spring pressure.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In FIG. 1, reference numerals 11 and 12 denote two sets of square pipes rotatable in the shape of a rectangle, one end 13 of which is fixed and rotatable, and the other end 14 of which is a slide rail 15, 16
Can be moved horizontally along the guide grooves 15a and 16a. 8 is a gas spring for pushing up the screen holding rod 5, 17 is a spring fitted in a horizontally movable groove 16a to control the movement when the pantograph pipe is lowered, and 18 is a tip of the spring 17 The contact plate 19 is a fixed rotating shaft of the two sets of rectangular pipes 1 and 2.

Next, the operation will be described. In the screen structure as described above, when the screen is used, the spring 17 in the horizontal direction is operated, so that the force for pushing up the screen film holding rod 5 acts, thereby reducing the lifting force and using the screen film 9. At times, the spring 17 does not drop suddenly due to the action of the spring 17, and a smooth movement can be obtained.

[0010]

As described above, according to the present invention, by operating the spring when the screen is stored, it is possible to obtain a safe screen structure without danger of sudden drop.

[Brief description of the drawings]

FIG. 1 is a rear view showing a screen structure according to an embodiment of the present invention.

FIG. 2 is a rear view showing a conventional screen structure.

[Explanation of symbols]

 11,12 Rectangular pipe 13,14 Slide groove 15,16 Slide rail 17 Spring 18 Spring contact plate

Claims (2)

(57) [Claims] 1. A pantograph combination of two sets of rectangular pipes in which two pipes are rotatably pivotally connected, one end of which is on the cabinet side where the screen membrane is stored, and the other end of which is a screen membrane holding. and Kururuji the rod side, the screen structure having a gas spring in the cabinet side, upper
Write both ends of the pipe to the guide rail guides
Structure to move horizontally along the groove
The spring in the end sliding groove of the
Screen structure characterized by being connected . 2. A structure in which both ends of a pair of rectangular pipes are horizontally moved along guide grooves of a slide rail, and springs are connected to end slide grooves on the cabinet side via spring contact plates. The screen structure according to claim 1.