JPH0143801Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a rotary magnet type switch that is applied to shutter devices for shutters, security switches for building openings such as doors and windows, and the like.

[Conventional technology]

In conventional rotary magnet type switches, the reed switch and the magnet are separate from each other, making it difficult to adjust the distance between the reed switch and the center of the magnet to a predetermined value.

In addition, because the magnet rotates freely over the entire 360-degree range, the magnetic force cannot always be applied effectively to the reed switch, causing the sensitivity of the reed switch and the operating stroke to fluctuate, resulting in unstable operation. It was easy to become.

Furthermore, with conventional products, the operation of the rotary magnet switch could not be inspected until it was a completed product, such as a shutter device, and there was a possibility that defective products would be produced.

Furthermore, since the distance between the pair of supporting pins of the magnet could not be finely adjusted, the magnet could sometimes tilt, which also led to unstable switch operation.

On the other hand, there was a rotary magnet type switch in which a reed switch and a magnet were installed in a case, and a stopper was also provided to restrict the rotation range of the magnet (for example, in Japanese Patent Application Laid-Open No. 49-72662).
issue).

[The problem that the idea aims to solve]

However, this rotary magnet type switch has a disadvantage in that it is not easy to assemble because the reed switch and magnet are built into the case.

Therefore, it is an object of this invention to provide a rotary magnetic switch that is robust and easy to assemble.

[Means to solve the problem]

The rotary magnetic switch of this invention is
It is approximately U-shaped, and has a fixed shaft protruding from the inside of the middle piece, a first claw protruding from the opposite end of the middle piece of the pair of side pieces, and a first claw extending in the direction parallel to the middle piece. a U-shaped metal fitting with a second claw protruding from its side; and a caulking hole that is placed between the end portions of the pair of side pieces opposite to the middle piece and is caulked and fixed to the first nail. and a flat metal fitting having a screw shaft screwed into a position opposite to the fixed shaft and a stopper bent toward one side of the middle, and the side piece of the U-shaped metal fitting. a magnet having bearing recesses on both sides of its center portion into which the ends of the fixed shaft and the end of the screw shaft fit, respectively, and whose rotational position is regulated by the stopper; and the pair of side pieces of the U-shaped fitting. a printed circuit board having a caulking hole placed on the one side and caulked and fixed to the second claw, and a reed switch mounted at a position close to the magnetic pole of the magnet on the opposite side to the side piece; It is something that

[Effect]

According to the structure of this invention, the magnet rotates in response to the operation of the external magnet, and the reed switch operates in response to the operation of the magnet. In this case, since the magnet is joined by caulking the U-shaped metal fitting and the flat metal fitting, it can be made to have a robust structure and is easy to assemble. Further, the magnet is supported by a fixed shaft and a screw shaft between the U-shaped metal fitting and the flat metal fitting, and can be finely adjusted by adjusting the screw shaft, so that the magnet can be easily installed. Further, since the printed circuit board is caulked and fixed to the U-shaped metal fitting, it will not be deformed or damaged by external force, and wiring is easy because the printed circuit board is provided with a reed switch. Therefore, the overall structure is robust and can be easily assembled.

〔Example〕

An embodiment of this invention will be explained based on FIGS. 1 to 3. Fig. 1 is a schematic diagram of the entire shutter device, where 1 is the shutter, 2 is the stopper, 3 is the shutter drum, 4 is the main body frame, 5 is the control box, 6 is the rotary magnetic switch, and 7 is the shutter device.
8 is a reed switch, and 9 is a rubber band-shaped magnet attached to the back of the shutter 1. This magnet 9 is provided at a height that exactly acts magnetically on the magnet 7 of the rotary magnetic switch 6 when the shutter 1 is in the fully closed state in contact with the stopper 2. The magnet 7 is rotated by the magnetic action to turn the reed switch 8 on or off, thereby controlling (stopping) the shutter motor (not shown) and turning on the security surveillance light.

The rotary magnet type switch 6 is constructed as shown in FIGS. 2 and 3. That is, 10 is a bracket that rotatably supports a cylindrical magnet 7 by opposing screw shafts 11 and fixed shafts 12, and this bracket 10 is a U-shaped metal fitting 10A consisting of a middle piece 22 and a pair of side pieces 23. And stoppa 1
3 and a flat metal fitting 10B which is bent and arranged in a row. A first claw 14 for caulking the flat metal fitting 10B is provided at the end of the side piece 23 of the U-shaped metal fitting 10A opposite to the middle piece 22. Caulking hole 2
0 is formed, and the first pawl 14 is passed through the caulking hole 20, and the bracket 10 has a sturdy structure.

The screw shaft 11 and the fixed shaft 12 have sharpened conical tips, and correspondingly conical recesses 15 and 16 are formed in the magnet 7. The fixed shaft 12 provided on the middle piece 22 has a collar 12a, and is driven into the hole 10a of the U-shaped metal fitting 10A and fixed thereto. The upper screw shaft 11 is screwed into the screw hole 10b of the flat metal fitting 10B.

There are four second caulking holes on one side of the side piece 23 of the U-shaped metal fitting 10A in a direction parallel to the middle piece 22.
The second claw 17 is attached to the printed circuit board 1.
The bracket 10 and the printed circuit board 18 are firmly integrated by being caulked into the caulking holes 21 of 8. A reed switch 8 is mounted on the printed circuit board 18 at a position opposite to the side piece 23 and corresponding to the magnet 7. The stopper 13 provided on the flat metal fitting 10B determines the maximum rotation angle of the magnet 7, and the magnet 7 received by the stopper 13 exerts a maximum magnetic force on the reed switch 8.

According to the structure of this embodiment, since the bracket 10 and the printed circuit board 18 are integrated, the distance L between the center of the magnet 7 and the reed switch 8 can be maintained at a predetermined value. Also, magnet 7 is connected to stopper 1.
3, it is possible to apply a strong and stable magnetic force to the reed switch 8,
Reliability is significantly improved compared to the conventional method.
Further, the operation of the reed switch 8 can be inspected at the block stage in FIG.

Further, fixing the U-shaped metal fitting 10A and the flat metal fitting 10B, and fixing the U-shaped metal fitting 10A and the printed circuit board 1.
Since the fixation with 8 is done by caulking, manufacturing is easy and the product can be made sturdy.

Further, by finely adjusting the screw shaft 11, the distance between the U-shaped metal fittings 10A and the flat metal fittings 10B,
Variations in the driving depth of the fixed shaft 12, the depth of the recesses 15 and 16 of the magnet 7, and the dimensions (c-d) in the figure can be well absorbed. In other words,
The rotational axis of the magnet 7 passing through the axes of the screw shaft 11 and the fixed shaft 12 can be maintained at one point in both the directions of arrows a and b, thereby preventing the magnet 7 from tilting and making its rotation smooth. As a result, the reliability of the operation of the reed switch 8 can be greatly improved. In addition, 19 in the figure is an adhesive for fixing the screw shaft 11.

[Effects of the invention] According to the rotary magnet type switch of this invention, since the magnet is connected by caulking the U-shaped metal fitting and the flat metal fitting, it can be made to have a robust structure and is easy to assemble. Further, the magnet is supported by a fixed shaft and a screw shaft between the U-shaped metal fitting and the flat metal fitting, and can be finely adjusted by adjusting the screw shaft, so that the magnet can be easily installed. Further, since the printed circuit board is caulked and fixed to the U-shaped metal fitting, it will not be deformed or damaged by external force, and wiring is easy because the printed circuit board is provided with a reed switch. Therefore, the overall effect is that it is robust and can be easily assembled.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of the shutter device, FIG. 2 is a perspective view of an embodiment of the invention, and FIG. 3 is a partially enlarged sectional view. 7...Magnet, 8...Reed switch, 1
0A...U-shaped metal fitting, 10B...Flat metal fitting, 1
DESCRIPTION OF SYMBOLS 1... Screw shaft, 12... Fixed shaft, 13... Stopper, 14... First pawl, 15, 16... Recess, 1
7... Second nail, 18... Printed circuit board, 20,
21...Culking hole, 22...Middle piece, 23...Side piece.

Claims (1)

[Scope of utility model registration request] It is approximately U-shaped, and has a fixed shaft protruding from the inside of the middle piece, a first claw protruding from the opposite end of the middle piece of the pair of side pieces, and a first claw extending in the direction parallel to the middle piece. a U-shaped metal fitting with a second claw protruding from its side; and a caulking hole that is placed between the end portions of the pair of side pieces opposite to the middle piece and is caulked and fixed to the first nail. and a flat metal fitting having a screw shaft screwed into a position opposite to the fixed shaft and a stopper bent toward one side of the middle, and the side piece of the U-shaped metal fitting. a magnet having bearing recesses on both sides of its center portion into which the ends of the fixed shaft and the end of the screw shaft fit, respectively, and whose rotational position is regulated by the stopper; and the pair of side pieces of the U-shaped fitting. a printed circuit board having a caulking hole placed on the one side and caulked and fixed to the second claw, and a reed switch mounted at a position close to the magnetic pole of the magnet on the opposite side to the side piece; Rotary magnetic switch.