JP2007026771A - Door switch element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch element which surely acquires an open/close signal of a door even if a gap between a door and a door frame is large. <P>SOLUTION: The switch element comprises a strike box 4 and a movable magnet block 6. The strike box 4 has a box-shaped body having an aperture in one surface, and is embedded in one of a free-side edge of a door and a door frame while the aperture is directed outward. The movable magnet block 6 has a magnet case 7 having a box-shaped body made of non-magnetic material with thin thickness, and magnets 8 stored in the magnet case and is energized outward. The switch element, further, comprises a stopper 16 to regulate projection amount of the movable magnetic block from a front board 5 when external force does not act upon the movable magnet block 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a novel door switch element (hereinafter simply referred to as a switch element), and in particular, operates reliably even when the chile dimension (the dimension of the gap between the free side edge of the swing door and the door frame when the door is closed) is large. The present invention relates to a switching element.

  In order to comprehensively manage rooms in buildings and condominiums, it is a well-known matter to take out the opening / closing signal of the door of each room and supply it to the control device.

  In this case, for example, a door switch 1 as shown in FIG. 1 is used to detect an open / close signal indicating opening / closing of the door opening.

  That is, in the figure, reference numeral 2 denotes a switch element having a built-in permanent magnet, and this switch element is embedded in one of the free side edge of the door or the door frame (in the illustrated embodiment, the free side edge of the door). A reed switch 3 that is driven by magnetic flux is embedded in a portion of the door frame that faces the switch element when the door is closed.

In the door switch configured as described above, for example, a reed switch is closed due to the proximity of the switch element 2 when the door is closed. Therefore, the output signal of this reed switch is sent to a control device (not shown) to manage the building. Use as data.
Japanese Examined Patent Publication No. 3-0773709

  Of course, the door switch configured as described above has been practically used with its intended function, but the magnetic flux density of the switch element that controls the reed switch is the distance between the switch element and the reed switch, in other words, 1 is inversely proportional to the dust size C in FIG. 1, for example, a door that can be opened even if the size of the dust frame is increased and the door frame is deformed, such as an anti-seismic door, the operation of the door switch is uncertain. .

  In addition, since the chile size has little secular change, the distance between the switch element 2 and the reed switch 3 can be adjusted according to the chile size. When the chile size is large, the free side edge of the door or When trying to operate the door switch reliably by protruding from the door frame, this time, as in the invention described in Patent Document 1, the door frame is deformed in the direction of reducing the dust between the door and the door frame, There arises a disadvantage that the effect of a so-called anti-seismic hinge that prevents the door from closing due to an earthquake cannot be expected.

  Accordingly, an object of the present invention is to provide a switch element that can be used even in doors with large dust such as anti-seismic doors, and that can also use so-called anti-seismic hinges related to the manufacture and sale of the present applicant. Yes.

  In order to achieve the above object, the present invention provides a door switch element having a permanent magnet embedded in one of the free side edge of the swing door and the door frame facing the free side edge when the door is closed, and when the door is closed. In a door switch having a reed switch embedded in the other part aligned with the door switch element, the door switch element is a box-shaped body having one side open, and the free side edge of the door with the opening facing outside A movable magnet block that has a troyoke embedded in one side of the door frame and a magnet case that is a non-magnetic material and a thin box-like body, and stores a permanent magnet inside the magnet case and is biased outward. And a front plate mounted so as to open the guide hole of the movable magnet block so as to cover the opening of the troyoke, and in a normal state where no external force acts on the movable magnet block, the front of the movable magnet block And having a stopper for restricting the amount of projection of the plate.

  In the normal state in which the external force does not act on the movable magnet block, the door switch incorporating the switch element configured as described above has a permanent magnet protruding from the front plate to reduce the distance from the reed switch. Even with a large door, the door switch can operate reliably.

  In addition, since the movable magnet block can be retracted inwardly, when the switch element according to the present invention is applied to a door equipped with the anti-seismic hinge according to the invention described in Patent Document 1, the function of the anti-seismic hinge is impaired. There are various effects, such as no inconvenience.

  Stopper that guides the permanent magnet for driving the reed switch so that it can move in the front-rear direction perpendicular to the front plate of Troyoke, and urges it in the direction that protrudes from the front plate, and also controls the amount of protrusion from the front plate in the normal state The door switch operates reliably even in doors with large chili dimensions, and does not impair the function of the anti-seismic hinge by pulling it into the trolley when the anti-seismic hinge is in operation.

Embodiments of the present invention will be described below with reference to the drawings.
In the illustrated embodiment, the switch element of the present invention is attached to the free side edge of the door. This is because a reed switch that takes out a signal through a conductive wire has a complicated structure when installed on a movable door.

  2 and 3, reference numeral 4 denotes a troyoke, which is a box-like body having one open surface as shown in FIGS. 4 and 5, and its upper and lower opening edges as shown in FIG. 3. Are integrally coupled to the front plate 5 via a mounting plate 4a formed integrally therewith.

  The trowel 4 is embedded in a free side edge of a door (not shown) with the front plate 5 mounted so as to cover the opening facing outside. In this case, the mounting plate 4a is attached to the free side edge of the door, for example, by screwing.

  A movable magnet block denoted as a whole by reference numeral 6 is accommodated in the trolley 4 so as to be movable in the front-rear direction perpendicular to the front plate 5 (left-right direction in FIG. 3).

  The movable magnet block 6 in the illustrated embodiment has a thin plate-like box-like body with one surface open and has a nonmagnetic magnet case 7, and a pair of permanent magnets 8 and 8 are accommodated in the magnet case 7. .

  In order to define the interval between the permanent magnets 8 and 8, as shown in FIGS. 2 and 7, a U-shaped spacer 9 protruding inwardly on the bottom surface (upper surface in FIG. 7) of the magnet case 7 is provided, for example. It is formed by pressing.

  Further, as shown in FIG. 7, the pair of permanent magnets 8 and 8 that maintain a predetermined distance between them by the spacer 9 are housed in the magnet case 7 with the magnetic poles opposite in the thickness direction of the front plate. .

  In order to reduce the magnetic resistance between the pair of permanent magnets 8 and 8, a thick plate made of a magnetic material is provided between the permanent magnets 8 and 8 at the opening of the magnet case 7 as shown in FIGS. The yoke 11 is passed over.

  Further, in order to prevent the yoke 11 from falling off from the magnet case 7, as shown in FIG. 8, constricted portions 12 are formed at both side edges, and a magnet base 13 larger than the opening of the magnet case 7 is covered with the opening of the magnet case. As shown in FIG. 6 and FIG. 7, the locking pieces 14, 14 projecting from the opening edge of the magnet case are engaged with the constricted portions 12, 12, and bent in this manner. The magnet case 7 and the magnet base 13 are integrally coupled to constitute the movable magnet block 6.

  On the other hand, as shown in FIGS. 4 and 5, at least one second stopper 17 can be protruded inwardly on the side plates of Troyoke 4 facing each other, and at least one first stopper 16 can be cut inwardly. To form.

  As shown in FIG. 3, after a pair of conical spring springs 15 and 15 are inserted into the troyoke 4, the movable magnet block 6 is placed in the troyoke with the magnet base 13 first. After the insertion, the first stoppers 16 and 16 are bent inward to prevent the movable magnet block 6 from coming off.

  As is clear from FIG. 3, the formation position of the first stopper 16 is set so that the protruding amount of the movable magnet block 6 from the strike plate 5 becomes a predetermined value.

  The second stopper 17 is formed at a position where the movable magnet block 6 receives an external force and is pushed into the trolley, and when the outer surface is flush with the strike plate, the magnet base 13 is stopped by the second stopper. Set to

  In the switch element according to one embodiment of the present invention configured as described above, since the movable magnet block 6 protrudes from the strike plate 5, the distance between the permanent magnet and the reed switch can be reduced even in a door having a large dust size. The door switch can be operated reliably.

  In addition, when the present invention is applied to a door equipped with the anti-seismic hinge according to the invention described in Patent Document 1, even if the door frame is deformed by an earthquake, the movable magnet block is drawn into the troyoke. There is no need to act.

The diagram for demonstrating the structure of a door switch. The front view of the switch element by one Example of this invention. The partial cross section side view. The partial cross section side view of Troyoke. The bottom view of Troyoke. The top view of a movable magnet block. FIG. The top view of a magnet base.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door switch 2 Switch element 3 Reed switch 4 Troyoke 5 Front board 6 Movable magnet block 7 Magnet case 8 Permanent magnet 9 Spacer 11 Yoke 12 Constricted part 13 Magnet base 14 Locking piece 15 Energizing spring 16 1st stopper 17 2nd stopper

Claims (1)

  Embedded in the door switch element with a permanent magnet embedded in one of the free side edge of the swing door and the door frame facing this free side edge when the door is closed, and in the other part that matches this door switch element when the door is closed In the door switch having a reed switch, the door switch element is a box-shaped body having one surface opened, and the opening is outside and the troyoke embedded in one of the free side edge of the door and the door frame; It has a magnet case that is a thin box-shaped body made of a magnetic material. A permanent magnet is housed inside the magnet case, and a movable magnet block that is biased outward and a guide hole of the movable magnet block are opened. A front plate mounted to cover the opening of the troyoke, and a stopper that regulates the amount of protrusion of the movable magnet block from the front plate in a normal state where no external force acts on the movable magnet block Door switch element comprising have.

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