JP2012214999A - Door closing detection mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door closing detection mechanism capable of surely detecting door closing, namely, greatly operation-reliable, and excellent in durability.SOLUTION: A trigger lever 5 is provided which is guided movably in the longitudinal direction perpendicular to a front plate 4 while passing through the front plate of a lock box. A permanent magnet 9 is energized toward a magnetism detecting element 7 fixed into the lock box 3 in the direction of approaching the magnetism detecting element 9, and guided to be moved in the same direction. During door opening, the permanent magnet 9 is locked to a position apart from the magnetism detecting element 7 by an operation lever 11, and during door closing, the permanent magnet 9 is unlocked utilizing the movement of the trigger lever 5 to be pushed into the lock box, and is put in close contact with the magnetism detecting element 7.

Description

  The present invention relates to a door closing detection mechanism (hereinafter simply referred to as a door closing detection mechanism) mounted on a lock box of an electric lock, and more particularly to a door closing detection mechanism that can reliably detect a door closing and has excellent durability.

  The door closing detection mechanism is an electrical signal that indicates that the door is completely closed, and is usually configured as a part of the function of an electric lock. Of course it can be installed.

  For example, when the door closing detection mechanism is provided in a management room of a building, it is possible to see the closed states of a large number of rooms at a glance while staying in the management room, which is very convenient for building management.

JP 2006-037355 A JP 11-11115 A

  The conventional door closing detection mechanism disclosed in, for example, Patent Document 1 is close to the magnetic detecting element 10 such as a reed switch disposed near the front plate in the lock box and close to the magnetic detecting element 10 when the door is closed. And a permanent magnet 13 mounted on a portion of the door frame. The magnetism detecting element is driven by the magnetic flux of the permanent magnet 13 that is close to the magnetism detecting element 10 when the door is closed, and an output signal from the magnetism detecting element is used as a door closing signal. .

  Moreover, what was described in patent document 2 arrange | positions freely the base end of the action lever 5 provided with the 1st permanent magnet in the free end in the frame box 1 with which the door side was mounted | worn, On the other hand, a second permanent magnet 4 that repels the first permanent magnet 3 is provided at a portion of the door frame where the first permanent magnet 3 is close when the door is closed, and a magnetic repulsive force generated by close proximity to each other when the door is closed. The microswitch 2 is driven by using it, and its output signal is used as a closing signal.

  These door closing detection mechanisms are practically used, but the magnetic sensing elements such as permanent magnets and reed switches have individual differences in magnetic flux density and sensitivity. In particular, the magnetic flux density depends on the gap between the door and the door frame ( Chile) Since it decreases in inverse proportion to the square of dimensions, there is still room for improvement, such as unstable operation and lack of reliability.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a closed door detection mechanism that can reliably detect closed doors, that is, has high operational reliability and excellent durability.

  In order to achieve the above object, the present invention is provided with a trigger rod which is guided through the front plate of the lock box so as to be movable in the front-rear direction perpendicular to the front plate. A magnetic element is fixed, and one end portion is rotatably supported on the side plate of the lock box by the first rotating shaft on the front side of the magnetic detection element, and a permanent magnet is attached to the other end portion. Is provided with a connecting lever straddling one end portion of the operating lever and a portion in the lock box of the trigger rod, and this connecting lever, The second rotary shaft passing through the central portion is rotatably supported, and one end of the second rotary shaft is engaged with the trigger rod, and the other end is engaged with the first rotary shaft near one end of the operating lever. When protruding from the front plate, the other end of the connecting lever When the trigger rod is pushed into the lock box even a little by pushing one end of the magnet toward the magnetometer element to move the permanent magnet away from the magnetometer element and engaging the door frame when the door is closed, The other end of the actuating lever that expands the movement rapidly moves the permanent magnet close to the magnetism detecting element so that a closing signal can be generated even when the dust is large, and when the dust is small, After the permanent magnet is brought close to the magnetism detecting element, the other end of the saddle coupling lever having the permanent magnet in close contact with the magnetism detecting element is separated from one end of the operating lever.

  The door closing detection mechanism according to the embodiment of the present invention configured as described above suppresses the permanent magnet biased in the direction approaching the magnetic detection element when the door is opened so that the permanent magnet is separated from the magnetic detection element by the connecting lever. When the trigger 杆 is pushed into the lock box even when the door is closed, the other end of the connecting lever opens the operating lever, and the permanent magnet at the other end is brought close to the magnetometer, and the permanent magnet is magnetized. After close contact with the element, the other end of the saddle coupling lever that maintained the close contact state is separated from the operating lever. Therefore, regardless of the size of the dust, the magnetic flux density of the permanent magnet and the detection element Regardless of sensitivity variations, it is possible to reliably detect closing.

  In addition, the force applied to the joint between the permanent magnet and the magnetic sensing element in the mechanism is a slight one that does not exceed the biasing force of the operating lever, and since no collision occurs, it is excellent in durability, etc. There is an effect.

The side view of the electric lock provided with the closing detection mechanism by the present invention. It is a front view of the principal part of a closing detection mechanism, and shows the state where a trigger rod was pushed into the lock box a little. FIG. 3 is a front view similar to FIG. 2, showing a state where the permanent magnet is in close contact with the magnetism detecting element.

  The permanent magnet is biased in the direction close to the magnetic sensing element and guided so that it can be moved in the same direction with respect to the magnetic sensing element fixed in the lock box. The permanent magnet is unlocked by using a movement that is locked into a position away from the magnetic element and is pushed into the lock box of the trigger rod when the door is closed.

An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an electric lock deadbolt, and reference numeral 2 denotes a latch bolt. Since the configuration and operation of these deadbolt 1 and latch bolt 2 are not the gist of the present invention, further detailed explanation is omitted. To do.

  In the vicinity of the front plate 4 of the lock box 3, a trigger bar 5 is disposed in a portion between the dead bolt 1 and the latch bolt 2.

  The trigger rod 5 is, for example, a thick plate material having a mountain-shaped horizontal projection at a portion protruding outside the front plate 5 and is movable through the front plate 5 in the front-rear direction (left-right direction in FIG. 1). Guided.

  And it is urged | biased by the direction which protrudes ahead (leftward in FIG. 1) with the elasticity of the trigger spring 6. FIG.

  The trigger bar 5 engages with a door frame (not shown) when the door is closed and is pushed into the lock box. The movement of the trigger bar 5 is used to control the functional blocks in the lock box. Since the configuration and function of 5 itself are well known, further detailed description is omitted.

  On the other hand, a magnetism detecting element 7 such as a reed switch is fixed below the latch bolt 2 with its front surface, that is, the magnetism detecting surface facing the back surface of the front plate 4.

  A space between the front surface of the magnetism detecting element 7 and the front plate 4 extends in the vertical direction, and an upper end portion is rotatably supported on the side plate of the lock box 3 by the first rotating shaft 8 and a lower end. An operating lever 11 having a permanent magnet 9 mounted on the part is disposed.

  The operating lever 11 is counterclockwise in FIG. 1, in other words, the permanent magnet 9 is close to the magnetism detecting element 7 by the elasticity of the operating lever spring 12 as a torsion coil spring mounted on the first rotating shaft 8. Is biased in the direction.

  On the other hand, a connecting lever 13 extending in the vertical direction, for example, is provided so as to straddle one end portion (upper end portion) of the actuating lever 11 and a portion of the trigger bar 5 in the lock box.

  The connecting lever 13 is supported so as to be rotatable around a second rotating shaft 14 that passes through the central portion thereof, and a connecting lever spring as a torsion coil spring mounted on the second rotating shaft 14 (see the drawing clearly). 1 is biased counterclockwise in FIG.

  One end (upper end in FIG. 1) of the connecting lever 13 is engaged with the trigger rod 5 from the rear, and the other end is engaged with the vicinity of the first rotating shaft 8 at one end (upper end) of the operating lever 11 from the front. Yes.

  Therefore, the lever ratio of the operating lever is increased, and the movement of the other end of the connecting lever 13 is expanded by the operating lever 11 and transmitted to the permanent magnet 9.

  Therefore, when the trigger rod 5 protrudes from the front plate 4, the other end of the coupling lever 13 pushes one end of the operating lever toward the magnetism detecting element 7, and the permanent magnet 9 is greatly separated from the magnetism detecting element. ing.

  On the other hand, when the trigger rod 5 is pushed into the lock box 3 even a little by engaging with the door frame when the door is closed, as shown in FIG. The part rapidly brings the permanent magnet 9 close to the magnetism detecting element 7.

  When the trigger bar 5 is further pushed into the lock box, the permanent magnet 9 and the magnetism detecting element 7 come into close contact with each other as shown in FIG. The contact state does not change.

  Therefore, the closing signal, which is an output signal from the magnetic sensing element 7, can be detected with high sensitivity by the initial movement of the trigger rod 5.

  When the door is opened, the permanent magnet 9 and the magnetic detecting element 7 are separated from each other by the elasticity of the trigger spring 6, the unnumbered connecting lever spring and the operating lever spring 12, and the closing signal disappears.

DESCRIPTION OF SYMBOLS 1 Dead bolt 2 Latch bolt 3 Lock box 4 Front plate 5 Trigger hook 6 Trigger spring 7 Magnetic detecting element 8 1st rotating shaft 9 Permanent magnet 11 Actuating lever 12 Actuating lever spring 13 Connecting lever 14 2nd rotating shaft

Claims (1)

  A trigger rod that is guided so as to be movable in the front-rear direction perpendicular to the front plate is provided so as to penetrate the front plate of the lock box. On the other hand, a magnetism detection element is fixed in the lockbox. On the front side, one end is pivotally supported on the side plate of the lock box by the first rotating shaft, and a permanent magnet is attached to the other end, and the permanent magnet is biased in the direction approaching the magnetometer. Provided with a connecting lever straddling one end of the operating lever and a portion of the trigger rod in the lock box, and connecting the connecting lever around the second rotation axis passing through the central portion thereof. When the trigger rod protrudes from the front plate, one end of the lever is engaged with the trigger rod and the other end is engaged in the vicinity of the first rotating shaft at one end of the operating lever. The end pushes one end of the operating lever toward the magnetometer element to When the trigger rod is pushed into the lock box even a little by moving it away from the magnetometer and engaging the door frame when the door is closed, the other end of the actuating lever is moved rapidly. The permanent magnet is brought close to the magnetism detecting element so that a closing signal can be generated even when the dust is large, and when the dust is small, the permanent magnet is moved close to the magnetism detecting element, A door closing detection mechanism characterized in that the other end of the hook coupling lever in close contact with the magnetism detecting element is separated from one end of the operating lever.

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