JP5923748B2 - Locking detection device for joinery - Google Patents

Description

  The present invention relates to a locking / unlocking detection device for joinery that detects locking / unlocking of a lock that locks a fitting provided in a doorway or a window of a building.

  For example, Patent Literature 1 discloses a door tightness detection device that detects each state of locking and unlocking of a crescent lock provided on a fitting (sliding door) that opens and closes a window. In this conventional example, a permanent magnet is attached to an operation piece of a crescent lock provided on one side of a retractable window frame, and a proximity sensor is incorporated in a wireless transmitter provided on the other window frame. A reed switch is used for the proximity sensor. In the locked state of the crescent lock, the reed switch is turned on by the magnetic field of the permanent magnet attached to the operation piece, and in the unlocked state, the reed switch is separated to release the permanent magnet attached to the operation piece. The switch turns off. Then, the lock / unlock state of the crescent lock detected by turning on / off the reed switch is transmitted from the wireless transmitter as a wireless signal.

JP-A-6-309572

  By the way, in recent years, crescent locks with various shapes and sizes are commercially available, and those having a narrower gap between the operation piece and the window frame than the conventional one, and those having the surface of the operation piece formed in a curved shape have become widespread. ing. In order to cope with such a new type of crescent lock, it is preferable to downsize the permanent magnet.

  However, when the size of the permanent magnet is simply reduced, the magnetic field of the permanent magnet is also weakened, so that there is a problem that the detection sensitivity of the door lock is lowered.

  The present invention has been made in view of the above problems, and an object thereof is to reduce the size of a permanent magnet while suppressing a decrease in detection sensitivity.

The locking / unlocking detection device for joinery of the present invention is a locking / unlocking detection device for fittings that detects locking / unlocking of a lock that locks a fitting provided in an entrance or a window of a building, and includes a permanent magnet and a magnetic detection that detects a magnetic field. And a magnetic body for guiding the magnetic flux of the permanent magnet to the magnetic detection unit, and the permanent magnet is provided on either the operation piece of the lock or the joinery that is displaced between the locked position and the unlocked position. attached, said magnetic detection unit has two magnetic sensors, the detected magnetic field based on the difference between the detection outputs of the two magnetic sensors, the magnetic detection unit and said magnetic body, said operating piece wherein said permanent magnet is mounted towards unattached among joinery, the magnetic body and is disposed in the vicinity of the two magnetic sensors, said two magnetic sensors, the mutual magnetic field detection direction Aligned and facing each other with the magnetic material in between It is arranged so that it may be arranged.

In this lock / unlock detection apparatus for joinery, the magnetic body is preferably made of an anisotropic magnetic body, and the magnetic sensor is preferably arranged so that the magnetic field detection direction coincides with the easy magnetization direction of the magnetic body .

The locking / unlocking detection device for joinery of the present invention is a locking / unlocking detection device for fittings that detects locking / unlocking of a lock that locks a fitting provided in an entrance or a window of a building, and includes a permanent magnet and a magnetic detection that detects a magnetic field. And a magnetic body for guiding the magnetic flux of the permanent magnet to the magnetic detection unit, and the permanent magnet is provided on either the operation piece of the lock or the joinery that is displaced between the locked position and the unlocked position. The magnetic detection unit includes a plurality of sets of magnetic sensors each including two sets, detects a magnetic field based on a difference between detection outputs of the plurality of magnetic sensors, and the magnetic detection unit and the magnetic detection unit The magnetic body is attached to one of the operation piece and the fitting that is not attached with the permanent magnet, the magnetic body is disposed in the vicinity of the plurality of magnetic sensors, and the magnetic flux of the permanent magnet is Lead to multiple sets of magnetic sensors A plurality of magnetic bodies are integrally formed, the magnetic bodies are formed in a cross shape, and the two magnetic sensors in one set are opposed to the tips of a pair of non-adjacent convex portions of the magnetic bodies. It is characterized by being arranged.
In this joinery locking / unlocking detection apparatus, it is preferable that the magnetic body has a tip portion facing the magnetic sensor formed in a tapered shape.

The locking / unlocking detection device for joinery of the present invention is a locking / unlocking detection device for fittings that detects locking / unlocking of a lock that locks a fitting provided in an entrance or a window of a building, and includes a permanent magnet and a magnetic detection that detects a magnetic field. And a magnetic body for guiding the magnetic flux of the permanent magnet to the magnetic detection unit, and the permanent magnet is provided on either the operation piece of the lock or the joinery that is displaced between the locked position and the unlocked position. The magnetic detection unit includes two magnetic sensors, detects a magnetic field based on a difference between detection outputs of the two magnetic sensors, and the magnetic detection unit and the magnetic body include the operation piece. The magnetic body is attached to a side where the permanent magnet is not attached, and the magnetic body is formed in a tapered shape at a tip portion facing the magnetic sensor, and is disposed in the vicinity of the two magnetic sensors. It is characterized by being.
In this join / unlock detection apparatus for joinery, it is preferable that the magnetic body is made of any one of magnetic steel sheets, ferrite, permalloy, and amorphous magnetic bodies.

  INDUSTRIAL APPLICABILITY The joinery locking / unlocking detection device of the present invention has an effect that the permanent magnet can be reduced in size while suppressing a decrease in detection sensitivity.

It is the top view which showed embodiment of this invention and was abbreviate | omitted partially in the state attached to the fitting. It is the top view which abbreviate | omitted partially which shows another structure same as the above. It is the top view which abbreviate | omitted partially which shows another structure same as the above. It is a perspective view which shows the other structure of the magnetic detection part and magnetic body in the same as the above. It is a perspective view which shows the other structure of the magnetic detection part and magnetic body in the same as the above. It is a perspective view which shows the other structure of the magnetic detection part and magnetic body in the same as the above. It is a perspective view which shows the other structure of the magnetic detection part and magnetic body in the same as the above. It is a perspective view which shows the other structure of the magnetic detection part and magnetic body in the same as the above. It is a perspective view which shows the other structure of the magnetic detection part and magnetic body in the same as the above.

  Hereinafter, referring to the drawings, an embodiment in which the technical idea of the present invention is applied to a locking / unlocking detection device for fittings that detects each state of locking and unlocking of a crescent lock provided on a fitting (sliding door) that opens and closes a window. And will be described in detail.

  As shown in FIG. 1, the crescent lock 100 includes a crescent lock body 101 fixed to one of two sliding-type window frames 110, and a crescent receiver 102 fixed to the other window frame (not shown). Consists of. The crescent lock body 101 includes a rectangular parallelepiped base 103, a half-moon-shaped crescent portion 104 that is rotatably provided to the base 103, and an operation piece 105 that protrudes in parallel with the base 103 from one end of the crescent portion 104. It comprises. Then, by rotating the crescent portion 104 with the operation piece 105, when the operation piece 105 is positioned on the crescent portion 104, the crescent portion 104 is engaged with the crescent receiver 102 and the crescent lock 100 is locked. It becomes. On the other hand, when the operation piece 105 is positioned below the crescent portion 104, the engagement between the crescent portion 104 and the crescent receiver 102 is released, and the crescent lock 100 is unlocked. However, since such a crescent lock 100 is conventionally well-known, illustration and description of the detailed structure of the crescent lock body 101 are omitted. Hereinafter, the position of the operation piece 105 when the crescent lock 100 is in the locked state (position above the crescent part 104) is referred to as `` locking position '', and the position of the operation piece 105 when the crescent lock 100 is in the unlocked state ( The position below the crescent portion 104) will be referred to as the “unlocked position”.

  The locking / unlocking detection device for joinery (hereinafter, abbreviated as a detection device) of the present embodiment includes a permanent magnet 1 attached to the operation piece 105, and a detection device body 2 attached to the window frame 110 above the crescent lock body 101. Is provided.

  The permanent magnet 1 is attached to the side surface of the operation piece 105 using a double-sided tape or the like, and one end side in the left-right direction in FIG. 1 is an N-pole magnetic pole and the other end side is an S-pole magnetic pole.

The detection device 2 includes a magnetic detection unit 3 having a magnetic sensor 30 such as a Hall element, a magnetic body 4 disposed at a position facing the operation piece 105 at the locking position with the magnetic detection unit 3 interposed therebetween, and the magnetic detection unit 3. And a case 5 containing the magnetic body 4. The case 5 is formed of a rectangular parallelepiped synthetic resin molded body, and the magnetic sensor 30 and the magnetic body 4 are arranged at a position where the distance from the permanent magnet 1 is shortest when the operation piece 105 is in the locking position.

  The magnetic detection unit 3 includes a magnetic sensor 30 and a signal processing unit (not shown) that detects whether the operation piece 105 is in the locked position by performing signal processing on the detection output of the magnetic sensor 30. ing. Here, the magnetic sensor 30 is arranged in a direction in which the detection direction of the magnetic field (magnetic flux) coincides with the direction facing the operation piece 105 (the left-right direction in FIG. 1). For example, the signal processing unit compares the detection output of the magnetic sensor 30 with a predetermined threshold value. If the detection output exceeds the threshold value, the signal processing unit is locked, and if the detection output does not exceed the threshold value, the signal processing unit unlocks. Each status detection result is output. The detection result output from the signal processing unit is notified to an external device by a wireless signal using radio waves as a medium, for example, as in the conventional example described in Patent Document 1.

The magnetic body 4 is formed in a rectangular plate shape using, for example, an electromagnetic steel plate, ferrite, permalloy, amorphous magnetic body, or the like.

  Next, the operation of the detection apparatus of this embodiment will be described. As shown in FIG. 1, when the operating piece 105 is in the locked position, the magnetic line of force (magnetic flux) from the N pole to the S pole of the permanent magnet 1 is linked with the detection surface of the magnetic sensor 30 to detect the magnetic sensor 30. Since the output exceeds the threshold value, it can be detected that the operation piece 105 is in the locked position, that is, that the crescent lock 100 is in the locked state. On the other hand, when the operation piece 105 is in the unlocked position, the distance between the permanent magnet 1 and the magnetic sensor 30 is increased, so that the detection output of the magnetic sensor 30 does not exceed the threshold value. It can be detected that the crescent lock 100 is in the unlocked state.

Here, in the detection apparatus of the present embodiment, the magnetic body 4 is disposed in the vicinity of the magnetic sensor 30 (a position facing the permanent magnet 1 with the magnetic sensor 30 interposed therebetween). For this reason, the magnetic flux linked to the detection surface of the magnetic sensor 30 can be increased (the magnetic flux density is increased) compared to the case where the magnetic body 4 is not provided as in the conventional example. As a result, even if the permanent magnet 1 having a smaller dimension (weak magnetic field) than that of the conventional example is used, the detection sensitivity equivalent to that of the conventional example can be maintained.

That is, in the detection apparatus of this embodiment, since the magnetic body 4 that guides the magnetic flux of the permanent magnet 1 to the magnetic detection unit 3 is provided, the permanent magnet 1 can be reduced in size while suppressing a decrease in detection sensitivity.

However, as shown in FIG. 2, the magnetic detector 3 and the magnetic body 4 may be built in the pedestal 103 of the crescent lock body 101. Alternatively, as shown in FIG. 3, the permanent magnet 1 may be housed inside the pedestal 103, and the magnetic detection unit 3 and the magnetic body 4 may be provided on the operation piece 105.

  By the way, if the magnetic detection unit 3 includes a plurality of magnetic sensors 30 and the signal processing unit obtains a difference between detection outputs of the respective magnetic sensors 30 and compares it with a threshold value, the detection output due to noise such as geomagnetism is obtained. Thus, the detection accuracy can be improved. At this time, it is preferable that the two magnetic sensors 30 are juxtaposed in the left-right direction as shown in FIG. 4, and the permanent magnet 1 is disposed between the two magnetic sensors 30 when viewed from the front-rear direction.

Here, if the magnet is brought close to the magnetic detection unit 3 when the operation piece 105 is in the unlocked position, the detection output of the magnetic sensor 30 exceeds the threshold value, and the locked state of the crescent lock 100 is erroneously detected. There is a risk of it. Therefore, the two magnetic sensors 30 are disposed in opposing positions across the magnetic body 4 (left and right both sides of the magnetic body 4) as shown in FIG. 5, the magnetic field detecting direction of the magnetic sensor 30 are aligned in the lateral direction, It is desirable that the permanent magnet 1 is attached to the operation piece 105 so that the N pole and the S pole are aligned in the left-right direction. In this way, the position and orientation of the magnetic source (permanent magnet 1 or magnet) with respect to the magnetic sensor 30 can be determined by comparing the magnitude (magnitude) of the detection output of each magnetic sensor 30 with the magnitude. Therefore, erroneous detection by the magnet can be prevented.

Further, as shown in FIG. 6, the magnetic detection unit 3 may include a plurality of sets (two sets in the illustrated example) of magnetic sensors 30 each including two sets. The magnetic sensors 30 of each set are arranged at positions facing each other with the magnetic body 4 in between. Two magnetic sensors 30 are arranged in the left-right direction in one set, and the two magnetic sensors 30 are vertically moved in the other set. It is lined up in the direction. The latter set of magnetic sensors 30 is arranged below the former set of magnetic sensors 30. On the other hand, the permanent magnet 1 is arranged so that the directions in which the N pole and the S pole are arranged are inclined with respect to the left and right directions and the vertical direction, respectively. In this way, the position of the magnetic force source (permanent magnet 1 or magnet) with respect to each set of magnetic sensors 30 is compared by comparing the magnitude and magnitude of the detection output of each set of magnetic sensors 30 (direction of magnetic field). Since the orientation can be discriminated, erroneous detection by a magnet can be prevented. However, if the two magnetic bodies 4 are integrally formed as shown in FIG. 7, the number of parts can be reduced. Further, as shown in FIG. 8, the magnetic body 4 is formed in a cross shape, and one set of two magnetic sensors 30 are arranged to face the tips of a pair of convex portions 40 of the magnetic body 4 that are not adjacent to each other. It is preferable. In this way, the detection sensitivity can be improved by increasing the magnetic flux interlinking with the detection surface of the magnetic sensor 30 as compared with the case where there is no projection 40 (see FIG. 7).

Further, as shown in FIG. 9, the magnetic body 4 is preferably formed such that the tip portion facing the magnetic sensor 30 is tapered. Thereby, by concentrating the magnetic flux on the tip portion, the detection sensitivity of the magnetic detection unit 3 can be improved and the permanent magnet 1 can be downsized.

By the way, in the configuration shown in FIGS. 5, 6, and 9, the magnetic body 4 is made of an anisotropic magnetic body, and the magnetic sensor 30 is arranged so that the magnetic field detection direction coincides with the easy magnetization direction of the magnetic body 4. Preferably they are arranged. Thereby, the detection sensitivity of the magnetic detection part 3 can be improved and the permanent magnet 1 can be reduced in size.

DESCRIPTION OF SYMBOLS 1 Permanent magnet 2 Detection apparatus main body 3 Magnetic detection part 4 Magnetic body
30 Magnetic sensor
100 Crescent tablets
105 Operation piece

Claims (6)

A locking / unlocking detection device for a fitting that detects locking / unlocking of a lock that locks a fitting provided at a doorway or a window of a building, wherein the permanent magnet, a magnetic detection unit that detects a magnetic field, and the magnetic flux of the permanent magnet and a magnetic member for guiding the detecting unit, wherein the permanent magnet is attached to either one of the operation piece, or the fittings the lock for displacement between a locking position and an unlocking position, wherein the magnetic detection unit is 2 It has a magnetic sensor, the detected magnetic field based on the difference between the detection outputs of the two magnetic sensors, the magnetic detection unit and the magnetic body, wherein the permanent magnet is mounted in one of the said operating piece joinery is attached to the not, the magnetic body is disposed in the vicinity of the two magnetic sensors, said two magnetic sensors, so that the mutual magnetic field detection directions opposite to each other across the uniform and the magnetic body It is arranged in Locking detection device for joinery. The locking / unlocking for joinery according to claim 1, wherein the magnetic body is made of an anisotropic magnetic body, and the magnetic sensor is arranged so that a magnetic field detection direction coincides with an easy magnetization direction of the magnetic body. Detection device. A locking / unlocking detection device for a fitting that detects locking / unlocking of a lock that locks a fitting provided at a doorway or a window of a building, wherein the permanent magnet, a magnetic detection unit that detects a magnetic field, and the magnetic flux of the permanent magnet The permanent magnet is attached to either the operation piece of the lock or the joinery that is displaced between the locked position and the unlocked position, and the two magnetic detection parts A magnetic field is detected based on a difference between detection outputs of the plurality of magnetic sensors, and the magnetic detection unit and the magnetic body are provided between the operation piece and the fitting. The magnetic body is attached to the side where the permanent magnet is not attached, and the magnetic body is disposed in the vicinity of the plurality of magnetic sensors, and a plurality of magnetic materials for guiding the magnetic flux of the permanent magnet to the plurality of sets of magnetic sensors, respectively. The body is integrally formed , The magnetic body is formed to cross, one set of two of the magnetic sensors the you being disposed so as to face the tip of the pair of convex portions which are not adjacent of the magnetic construction equipment Locking / unlocking detection device. The lock / unlock detection apparatus for joinery according to claim 1 or 3 , wherein the magnetic body has a tapered end portion facing the magnetic sensor . A locking / unlocking detection device for a fitting that detects locking / unlocking of a lock that locks a fitting provided at a doorway or a window of a building, wherein the permanent magnet, a magnetic detection unit that detects a magnetic field, and the magnetic flux of the permanent magnet The permanent magnet is attached to either the operation piece of the lock or the joinery that is displaced between the locked position and the unlocked position, and the two magnetic detection parts The magnetic sensor detects a magnetic field based on a difference between detection outputs of the two magnetic sensors, and the magnetic detection unit and the magnetic body are attached to the permanent magnet among the operation piece and the fitting. is attached to the not, the magnetic body, the magnetic sensor facing the leading end portion is formed in a tapered shape, and the for construction equipment you being disposed in the vicinity of the two magnetic sensors Locking / unlocking detection device. The lock / unlock detection apparatus for joinery according to any one of claims 1 to 5 , wherein the magnetic body is made of any one of an electromagnetic steel sheet, ferrite, permalloy, and an amorphous magnetic body .

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