JPH03665Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Field of Industrial Application" The present invention relates to a magnetic force switch device used by being incorporated into power distribution equipment in hotels, residences, and other buildings.

``Prior art'' As a conventional magnetic force switch device of this type, a magnet is brought close to a reed switch as shown in Utility Model Application Publication No. 60832 of 1983,
It is known that the reed switch is opened and closed by separating the reed switch, or that a magnetic body is interposed between the magnet and the reed switch to operate the reed switch and open and close the power supply circuit.

``Problems to be solved by the invention'' As mentioned above, conventional magnetic force switch devices are configured to open and close reed switches simply by the approach and separation of magnets, or by intervening a magnetic material between the magnet and the reed switch. If someone other than those involved in the building or a child mischievously brings the magnet close to the reed switch or inserts a simple iron plate between the magnet and the reed switch, the reed switch will be activated, causing an unexpected situation. .

The purpose of the present invention is to eliminate the disadvantages of the conventional magnetic force switch of this kind as described above, and to provide a magnetic force switch device in which the reed switch is not activated by intervention of a magnetic body having a single plate configuration. That is.

"Means for Solving the Problems" The present invention takes the following means to achieve the above object.

A frame is made of plastic or other non-magnetic material and has an insertion groove on one side.

A magnet is placed near one end of the frame and is inserted close to the groove.

Further, a reed switch is provided at the other end of the frame, the reed switch being close to the insertion groove with a distance between the reed switch and the magnet that is out of reach of the magnetic field of the magnet.

Next, two separate pieces of magnetic material are placed on both sides of the key card made of plastic or other non-magnetic material that can be freely inserted and removed into the insertion groove of the frame, and the key card is inserted into the frame. When the magnet is inserted into the insertion groove, the magnet is located between one end of the two magnetic bodies, and the other ends of the two magnetic bodies are narrowed and faced each other. A reed switch disposed on the frame is positioned close to the open space.

``Function'' In this invention, as mentioned above, a magnet is placed at one end of the frame made of non-magnetic material, and a reed switch is installed in a position out of the reach of the magnetic field. It is inactive when no card is inserted.

When the key card is inserted into the recessed groove, the two magnetic bodies on both sides of the key card are magnetized by the magnet located between them at one end, and a magnetic circuit is created between the two magnetic bodies, and the two magnetic bodies are magnetized. When magnetic flux passes through the gap between the opposing magnetic poles at the other end of the magnetic body, a magnetic field is generated with a leakage magnetic flux (fringing, field) phenomenon that bulges out in an arc shape outside the gap, and this arc shape A reed switch located within the expanding leakage flux is activated.

"Example" Next, an example of implementation of the present invention will be described in detail with reference to the drawings.

A vertically elongated insertion groove 3 with an open upper end 2 is formed on one side of the frame 1 made of plastic material or a non-magnetic material with the same effect, and is close to the center of the insertion groove 3 near the lower end. A magnet 4 is arranged on the frame 1.

In addition, a reed switch 5 is disposed on the frame 1 and is located above the magnet 4 at a distance that is out of reach of the magnetic field of the magnet 4 and close to the center of the upper end of the insertion groove 3. The conductive wires 6 at both ends are led out to the outside of the frame 1.

In addition to the frame 1, a vertically long key card 7 that can be freely inserted into and removed from the insertion groove 3 of the frame 1 is provided.
are made of plastic material or a non-magnetic material with the same effect, and separate magnetic bodies 8, 8' are arranged on both sides of the key card 7, and the two magnetic bodies 8, 8 The magnets 4 of the frame 1 are positioned within the mutual spacing 9 at the bottom of the frame 1.

Furthermore, the upper ends of the two separable magnetic bodies 8, 8' are bent inwardly to match the position of the reed switch 5 disposed on the frame 1, A gap 10 is formed between the upper ends of the magnetic bodies 8 and 8' on both sides, and when the key card 7 is inserted into the insertion groove 3 of the frame body 1, the key card is inserted as shown in FIG. A magnet 4 disposed close to the lower end of the insertion groove 3 of the frame body 1 is located within the interval 9 between the lower parts of the magnetic bodies 8, 8' on both sides of the frame body 1.
The gap 10 between the opposing upper ends of the frame body 1 is positioned close to the upper end of the insertion groove 3 of the frame body 1 and close to the middle of the reed switch 5 disposed.

8 to 12 relate to other embodiments in which a plurality of reed switches are provided, and FIG. FIG. 9 is a front view of the frame 1' taken longitudinally along line B-B' in FIG. 8, showing the arrangement of the plurality of reed switches 5, 11, 11'. This shows that.

FIG. 10 shows that in addition to the opening 10 corresponding to the reed switch 5, a plurality of openings 12, 12' are provided in accordance with the intermediate positions of the reed switches 11, 11' arranged in the frame 1. The formed magnetic body 8,
Fig. 11 is a side view of the key card 7' with parts 8' disposed inside both sides, Fig. 11 is a side view of the key card 7' with a portion cut away, and Fig. 12 is a side view of the key card 7' in which the frame body 1' is inserted. This indicates that the key card 7' is inserted into the recessed groove 3' and a plurality of reed switches are activated.

``Effects of the invention'' Since the invention is constructed as described above, when the key card is not inserted into the insertion groove of the frame, the magnetic field of the magnet placed in the frame does not reach the reed switch. The reed switch is kept in an inactive state, but when the key card is inserted into the insertion groove of the frame, a magnet is located between the lower parts of the two magnetic bodies that separate the two sides of the key card. , both magnetic bodies are magnetized, a magnetic circuit is created, and when magnetic flux passes through the opposing gap at the upper ends of both magnetic bodies, a magnetic field accompanied by a leakage magnetic flux phenomenon that bulges out in an arc shape outside the gap is generated. A reed switch located close to the side of the shaft is actuated by this leakage magnetic flux to close or open the power circuit of the electrical equipment connected to the reed switch.

That is, in the present invention, a magnet is positioned between the lower ends of each of the magnetic bodies arranged separately, so that the two magnetic bodies arranged separately are magnetically induced and magnetized, and the other ends of the magnetic bodies are mutually magnetized. The reed switch, which is located close to the side of the gap, can be operated by the leakage magnetic flux that bulges out in an arc shape of the magnetic field generated in the gap between the magnetic poles of the magnetic field. Even if a magnetic body is inserted into the recessed groove, the reed switch does not operate, and the reed switch is configured to correspond to the magnet and the reed switch, which are placed close to one side of the insertion groove of the frame and spaced apart vertically. The reed switch can only be activated by inserting the above-mentioned key card equipped with a magnetic material, so even if someone else inserts a simple magnetic material into the groove, the reed switch will not operate. The magnetic force switch device can be kept safely without the risk of causing an unexpected situation.

In addition, as another embodiment, a plurality of reed switches are arranged on the frame as shown in FIGS. 8 to 12, and magnetic bodies are separately arranged on the key card in correspondence with the plurality of reed switches. By forming multiple gaps, you can safely and securely close or open the power circuits of multiple electrical equipment that are individually electrically connected to multiple reed switches by simply inserting a key card and disconnecting them. You can go to

In addition, in the structure of the present invention, the reed switch and magnet can be arranged above and below close to one side of the insertion groove provided in the frame, so the frame can be made as thin and lightweight as possible and can be easily installed. can be made into something.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention.
The figure is a front view of the frame, Figure 2 is a partially cutaway side view of the same as above, Figure 3 is a plan view, Figure 4 is a longitudinal sectional front view taken along line A-A' in Figure 2, and Figure 5 is a key. The front view of the card, Figure 6 is a partially cutaway side view of the same as above,
Fig. 7 is a front view of the frame with a key card inserted by longitudinally cutting through the insertion groove part of the frame, Fig. 8 is a side view with a part of the frame of another embodiment cut away, and Fig. 9 The figure is a front view of the same B-B' longitudinal section, FIG. 10 is a front view of a key card in another embodiment, FIG. 11 is a partially cutaway side view of the same key card, and FIG. FIG. 7 is a front view of another embodiment in which a portion of the inserted insertion groove can be longitudinally cut. 1, 1'... Frame body, 3, 3'... Insertion groove, 4
...Magnet, 5...Reed switch, 7,7'...
Key card, 8, 8'...magnetic material, 10...air opening, 11,11'...reed switch, 12,1
2'... empty.

Claims (1)

[Scope of utility model registration request] An insertion groove is formed in a frame made of a non-magnetic material, a magnet is placed close to one end of the insertion groove, and the magnet is inserted at a distance beyond the reach of the magnetic field of the magnet. A reed switch is disposed close to the other end of the insertion groove, and a key card that fits freely in and out of the insertion groove is formed of a non-magnetic material, and a pair of magnetic bodies are attached to the key card. A key card is inserted into the insertion groove, and a magnet disposed near one end of the insertion groove is positioned between one end of the magnetic body disposed on the key card. and a magnetic force switch device in which the opposing gap between the other ends of the magnetic body is positioned close to the middle of the reed switch.