JP6315372B2 - Open / close detector for joinery - Google Patents

Description

  The present invention generally relates to an open / close detection device for joinery, and more particularly to an open / close detection device for joinery that detects an open / closed state of a joinery such as a door or a window.

  Conventionally, there has been a magnetic proximity switch including a magnet body that has a permanent magnet and is attached to a door, and a switch body that has a reed switch that closes a contact when the magnetic flux of the permanent magnet passes and is attached to a door frame (for example, a patent) Reference 1).

  When the door to which the magnet body is attached is closed, the magnetic flux of the permanent magnet passes through the reed switch in the switch body and the reed switch is turned on. On the other hand, when the door is opened, the magnet body and the switch body are separated from each other, so that the magnetic flux of the permanent magnet does not pass through the reed switch, and the reed switch is turned off. The magnetic proximity switch monitors the open / closed state of the door based on the on / off state of the reed switch.

Japanese Patent Laid-Open No. 10-12109

  Since the open / close detection device for a joinery that detects the open / closed state of a joinery such as a door or a window is used for crime prevention measures, there has been a demand for detecting the open / closed state of the joinery with a smaller opening amount.

  This invention is made | formed in view of the said subject, The place made into the objective is providing the opening / closing detection apparatus for fittings which can detect the open state of a fitting with a small opening amount.

In order to solve the above problems, a first invention is a joinery opening / closing detection device for detecting an open / closed state of a joinery provided at a doorway or a window of a building, wherein a magnetic field generating unit, a magnetic detection unit, and a magnetism are detected. A magnetic shield for shielding and a magnetic derivative are provided and configured as follows. Either one of the magnetic field generator and the magnetic detection unit is attached to the fittings. The magnetic field generation unit generates a magnetic field around. The magnetism detecting unit houses a magnetism detecting element for detecting magnetism in a housing, and detects an open / closed state of the joinery from a change in a magnetic field generated according to an opening operation and a closing operation of the joinery. The magnetic shield does not shield the magnetic field generated by the magnetic field generation unit when the joinery is in a closed state and travels toward the magnetic detection unit, and the magnetic field generation unit when the joinery is in an open state. It is provided at a position that shields the generated magnetic field toward the magnetic detection unit. The magnetic derivative is provided on both sides of the magnetic detection element along the magnetic field detection direction of the magnetic detection element, and the width dimension in the direction intersecting the magnetic field detection direction increases as the distance from the magnetic detection element increases. The magnetic flux of the magnetic field generator is guided to the magnetic sensing element.

  In the opening / closing detection apparatus for joinery described above, it is also preferable that the magnetic shield is formed larger than a magnetic field introduction surface of the magnetic derivative.

  In the opening / closing detection apparatus for joinery described above, it is also preferable that the magnetic shield and the magnetic derivative are integrally formed.

A second invention is a joinery opening / closing detection device for detecting an open / closed state of a joinery provided at a doorway or a window of a building, and includes a magnetic field generation unit, a magnetic detection unit, and a magnetic derivative, as follows: Composed. Either one of the magnetic field generator and the magnetic detection unit is attached to the fittings. The magnetic field generation unit generates a magnetic field around. The magnetism detecting unit houses a magnetism detecting element for detecting magnetism in a housing, and detects an open / closed state of the joinery from a change in a magnetic field generated according to an opening operation and a closing operation of the joinery. The magnetic derivative is provided on both sides of the magnetic sensing element along the magnetic field sensing direction of the magnetic sensing element. The magnetic derivative is formed in a shape in which a width dimension in a direction intersecting the magnetic field detection direction increases as the distance from the magnetic detection element increases, and guides the magnetic flux of the magnetic field generation unit to the magnetic detection element. The magnetic derivative includes an extension provided to protrude toward the magnetic field generation unit in a state where the joinery is closed.

  In the above-described opening / closing detection device for joinery, it is also preferable that the extension portion is provided outside the casing.

  In the above-described opening / closing detection device for joinery, it is also preferable to include a magnetic shield disposed on the side where the magnetic field generation unit moves relative to the magnetic sensing element when the joinery is opened.

  According to the first invention, when the joinery is opened from the closed state, the magnetic field generator moves to the other side of the magnetic shield as viewed from the magnetic sensing element. When the magnetic field generated by the magnetic field generator is shielded by the magnetic shield, the magnetic flux interlinked with the magnetic sensing element becomes smaller than when the joinery is closed. Is detected. By arranging the magnetic shield on the side where the magnetic field generating unit moves relative to the magnetic sensing element when the joinery opens, the magnetic sensing area of the magnetic sensing unit in the direction to open the joinery becomes narrower, so magnetic sensing The part can detect the open state with a smaller opening amount.

  According to the second invention, the extension part is provided so as to protrude toward the magnetic field generation part in a state in which the joinery is closed, so that the magnetic detection area can be expanded in the closing direction. Therefore, even when the magnetic detection area by the magnetic detection element is narrowed so that the open state of the joinery can be detected with a smaller opening amount, the closed state of the joinery can be reliably detected. Therefore, it is possible to realize a joinery opening / closing detection device that can detect the open state of the joinery with a smaller opening amount.

The opening / closing detection apparatus for fittings in Embodiment 1 is shown, (a) (c) is a front view, (b) (d) is principal part sectional drawing seen from the top. The opening / closing detection apparatus for joinery in Embodiment 1 is shown, (a) is principal part sectional drawing seen from the front, (b) is principal part sectional drawing seen from the top. 1 shows an opening / closing detection apparatus for joinery in Embodiment 1, wherein (a) is a cross-sectional view of a main part viewed from above, (b) is a front view of a magnetic derivative and a magnetic shield, and (c) is a view of a magnetic derivative and a magnetic shield. A right side view and (d) are bottom views of the magnetic derivative and the magnetic shield. The other opening / closing detection apparatus for fittings in Embodiment 1 is shown, (a) (c) is principal part sectional drawing seen from the front, (b) (d) is principal part sectional drawing seen from the top. The other opening / closing detection apparatus for fittings in Embodiment 1 is shown, (a) is a front view of the principal part, (b) is principal part sectional drawing seen from the top. The other opening / closing detection apparatus for fittings in Embodiment 1 is shown, (a) is a front view, (b) is principal part sectional drawing seen from the top. 2 is a functional block diagram according to Embodiment 1. FIG. The opening / closing detection apparatus for fittings in Embodiment 2 is shown, (a) is principal part sectional drawing seen from the front, (b) is principal part sectional drawing seen from the top. The other opening / closing detection apparatus for fittings in Embodiment 2 is shown, (a) (c) is principal part sectional drawing seen from the front, (b) (d) (e) is principal part sectional drawing seen from the top. . It is principal part sectional drawing which looked at the other opening / closing detection apparatus for joinery in Embodiment 1 from the top. The other opening / closing detection apparatus for fittings in Embodiment 1 is shown, (a) is principal part sectional drawing seen from the top, (b) is a principal part enlarged view. It is principal part sectional drawing which looked at the other opening / closing detection apparatus for joinery in Embodiment 1 from the top.

  Hereinafter, an embodiment of an open / close detection device for a joinery that detects an open / closed state of a hinged door (for example, an entrance door) that opens and closes an opening (for example, an entrance / exit) of a building wall will be described with reference to FIGS. To do. In addition to the hinged door, the opening / closing detection device for a fixture is provided in an appropriate fixture that opens and closes an opening provided on a wall, such as a sliding door, an open window, and a sliding window, and the vicinity of the fixture. Also good. In the following description, the vertical and horizontal directions are defined with reference to the orientation shown in FIG. 2A, the upward direction in FIG. 2B is the rear direction (outdoor direction), and the downward direction in FIG. It will be described as (indoor direction).

(Embodiment 1)
As shown in FIGS. 1 (a) and 1 (b), the open / close detection device 1 for joinery of the present embodiment includes a magnetic field generation unit 2, a sensor body 3 (magnetic detection unit), and a magnetic shield 6c (magnetic shield). Is provided. The opening / closing detection device 1 for joinery is used to detect opening / closing of a hinged door 11 (joint fitting) such as an entrance door for the purpose of crime prevention.

  The magnetic field generator 2 is made of a material that generates a magnetic field, such as a permanent magnet. The magnetic field generator 2 is attached to the front surface (interior surface) of the edge portion on the opposite side of the hinge portion of the hinged door 11 with a double-sided tape or the like. The magnetic field generator 2 is arranged so that one end side in the vertical direction is an N pole and the other end side is an S pole. In addition, the method of attaching the magnetic field generation | occurrence | production part 2 to the hinged door 11 is not limited to use of a double-sided tape, A suitable method may be sufficient.

  The sensor body 3 (magnetic detection unit) includes a housing 5, a magnetic detection element 4 such as a Hall element, and a magnetic shield 6c. The magnetic detection element 4 is arranged so that the detection direction of the magnetic field (magnetic flux) coincides with the direction in which the magnetic flux generated by the magnetic field generator 2 intersects the magnetic detection element 4 (vertical direction in FIG. 2A). Yes. The magnetic sensing element 4 is not limited to a Hall element, and may be a magnetoresistive element, a magnetic impedance element, or the like.

  The housing 5 is formed in a box shape from a material that does not shield magnetism (for example, synthetic resin). Inside the housing 5, the magnetic detection element 4, the substrate 9, and the yoke 7 are housed on one end side in the longitudinal direction (lower side in FIG. 2A). The housing 5 further stores a battery (not shown) on the other end side in the longitudinal direction (upper side in FIG. 2A). The housing 5 is affixed using a double-sided tape or the like to the inside of the peripheral portion (for example, a wall material or a door frame) of the opening portion 10 in the wall 13 and close to the edge opposite to the hinge.

  The substrate 9 is composed of a printed wiring board, for example. As shown in FIG. 7, circuit components (not shown) for realizing the magnetic detection element 4, the determination unit 21, the control unit 22, and the wireless communication unit 23 are mounted on the substrate 9.

  The determination unit 21 determines the open / closed state of the hinged door 11 by processing the detection signal of the magnetic detection element 4. The signal processing (determination process) in the determination unit 21 will be described later.

  The wireless communication unit 23 performs wireless communication using radio waves as a medium with a security device (not shown) installed in the house, for example.

  The control unit 22 causes the wireless communication unit 23 to wirelessly transmit monitoring information (open / closed state of the hinged door 11) corresponding to the determination result of the determination unit 21 to the security device. The security device acquires the open / closed state of the hinged door 11 by receiving a wireless signal from the sensor main body 3, and notifies this by sound or light. Since a security system including such a security device is well known in the art, detailed illustration of the configuration and description of the operation are omitted.

  The magnetic shield 6c is made of a magnetic material having magnetic anisotropy (for example, an electromagnetic steel plate, ferrite, permalloy, amorphous magnetic material, etc.). The magnetic shield 6 c is formed in a rectangular plate shape, is parallel to the mounting surface of the sensor body 3 with respect to the wall 13, and is disposed on the front side (inside the room) from the front surface of the magnetic detection element 4. Here, the term “parallel” means that the magnetic shield 6c is arranged so as to appear substantially parallel to the mounting surface of the sensor body 3 with respect to the wall 13 when viewed from the direction along the wall 13 (left-right direction). It does not mean that the angle formed with the mounting surface is limited to 0 degrees.

  Further, the magnetic shield 6c is not limited to being provided inside the casing 5, but may be provided outside the casing 5 (as shown in FIGS. 1C and 1D).

  Here, as shown in FIGS. 4A to 4D, the magnetic shield may be provided perpendicular to the mounting surface of the sensor body 3 with respect to the wall 13. Each of the magnetic shields 6a and 6b is formed in a rectangular plate shape that is long in the vertical direction using the same material as the magnetic shield 6c. The magnetic shields 6a and 6b are respectively arranged on the front side (inside the room) of the magnetic sensing element 4 so that the longitudinal direction is along the vertical direction, orthogonal to the mounting surface of the sensor body 3 with respect to the wall 13. In addition, orthogonal here means that the magnetic shields 6a and 6b are arranged so as to be seen substantially perpendicular to the mounting surface of the sensor body 3 with respect to the wall 13 when viewed from the front surface. This is not to limit the angle formed by the mounting surface to 90 degrees.

  Of the magnetic shields 6a and 6b, the magnetic shield 6b provided farther than the magnetic sensing element 4 when viewed from the magnetic field generator 2 may be omitted. Furthermore, the magnetic shields 6a and 6b may be provided on both side surfaces on the outer side of the housing 5, as shown in FIGS. Similarly, of the magnetic shields 6a and 6b provided on both side surfaces on the outer side of the housing 5, the magnetic shield 6b provided farther than the magnetic detection element 4 when viewed from the magnetic field generator 2 is omitted. May be.

  Here, as shown in FIGS. 6A and 6B, the opening / closing detection device 1 for joinery may include a pair of yokes 7 (magnetic derivatives). The two yokes 7 and 7 are each made of a magnetic material having magnetic anisotropy (for example, a magnetic steel sheet, ferrite, permalloy, amorphous magnetic material, etc.). The two yokes 7, 7 are arranged on the front surface of the substrate 9 so as to be parallel to the mounting surface of the sensor body 3 with respect to the wall 13, and are arranged on both upper and lower sides sandwiching the magnetic detection element 4. For this reason, compared with the case where there is no yoke 7, the magnetic flux linked with the magnetic sensing element 4 can be increased (the magnetic flux density is increased). As a result, the detection sensitivity equivalent to that of the conventional example can be maintained even when the magnetic field generator 2 having a smaller size (weak magnetic field) than that of the conventional example is used. Further, the yoke 7 is formed in a shape in which the width dimension in the direction (horizontal direction in FIG. 6A) intersecting the magnetic field detection direction (vertical direction in FIG. 6A) increases as the distance from the magnetic detection element 4 increases. Has been. Therefore, the magnetic flux entering from the wide end portion of the yoke 7 is concentrated on the narrow end portion and linked to the magnetic detection element 4, so that the detection sensitivity of the magnetic detection element 4 is further improved. When the yoke 7 is made of a magnetic material having magnetic anisotropy, the two yokes 7 and 7 are arranged so that the easy magnetization direction matches the magnetic field detection direction of the magnetic detection element 4. Thereby, the detection sensitivity of the magnetic detection element 4 can further be improved.

  In the opening / closing detection apparatus 1 for a joinery including the yoke 7, the vertical dimension L3 (see FIG. 6A) of the magnetic shield 6c is between the upper and lower ends of the two yokes 7 on the upper and lower sides. It is formed to be larger than the dimension L1 (see FIG. 6A). Both ends of the magnetic shield 6c are formed so as to protrude in the vertical direction, and the yoke 7 and the entire magnetic detection element 4 are covered with the magnetic shield 6c when viewed from the front side. And the magnetic flux which goes to the magnetic detection element 4 is shielded by the magnetic shield 6c.

  Moreover, the opening / closing detection apparatus 1 for joinery may be provided with a yoke 7 and magnetic shields 6a and 6b, as shown in FIGS. 2 (a) and 2 (b) and FIGS. 3 (a) and 3 (b).

  The magnetic shields 6a and 6b are respectively arranged on the front side (inside the room) from the front surface of the yoke 7 so that the longitudinal direction is along the vertical direction, perpendicular to the mounting surface of the sensor body 3 with respect to the wall 13. In addition, orthogonal here means that the magnetic shields 6a and 6b are arranged so as to be seen substantially perpendicular to the mounting surface of the sensor body 3 with respect to the wall 13 when viewed from the front surface. This is not to limit the angle formed by the mounting surface to 90 degrees.

  Magnetic shields 6a and 6b shown in FIGS. 2 (a) and 2 (b) and FIGS. 3 (a) and 3 (b) are provided integrally with two yokes 7 and 7, respectively. The magnetic shield 6a is formed so that the left ends of the upper and lower yokes 7, 7 are connected to the upper and lower sides of the magnetic shield 6a. The magnetic shield 6b is formed so that the right ends of the upper and lower yokes 7, 7 are connected to the upper and lower sides of the magnetic shield 6b. Gaps 8 are respectively provided between the yoke 7 and the magnetic shields 6a and 6b. The vertical dimension L2 (see FIG. 3B) of the magnetic shields 6a and 6b is based on the dimension L1 between the upper and lower ends of the two yokes 7 on the upper and lower sides (see FIG. 3B). Are also formed to be larger and protrude in the vertical direction. For this reason, the magnetic shields 6a and 6b can more easily shield the magnetic flux from the direction along the wall 13 (left-right direction) toward the yoke 7 or the magnetic detection element 4. In the magnetic detection area DF1 (see FIG. 2B) in which the sensor main body 3 detects the magnetic field generator 2, the detection range on the indoor side is narrowed by the magnetic shields 6a and 6b.

  Here, the operation for the opening / closing detection device 1 for joinery to determine opening / closing of the hinged door 11 will be described with reference to FIGS. 2 (a), 2 (b), 3 (a), 3 (b), and 7. FIG.

  The sensor body 3 is installed on the indoor side in the peripheral part of the opening 10 in the wall 13. The magnetic field generator 2 is attached to the right end of the indoor surface of the hinged door 11 so that the center position in the vertical direction is aligned with the position of the magnetic detection element 4.

  Since the magnetic field generator 2 of the hinged door 11 in the closed state is on the rear side (outdoor) of the magnetic shields 6a and 6b, the magnetic flux generated by the magnetic field generator 2 is composed of the two yokes 7, Go through 7. Since a gap 8 is formed between the magnetic shields 6a and 6b and the two yokes 7 and 7, the magnetic shields 6a and 6b and the two yokes 7 and 7 are integrally formed. However, the magnetic flux passing through the two yokes 7, 7 is linked to the magnetic sensing element 4. That is, when the hinged door 11 is in the closed state, the magnetic shields 6 a and 6 b do not shield the magnetic flux from the magnetic field generator 2 toward the yoke 7 or the magnetic detection element 4. In the closed state, the magnetic flux generated by the magnetic field generation unit 2 is linked to the magnetic detection element 4 through the two yokes 7 and 7, and a signal exceeding a predetermined level from the magnetic detection element 4 is sent to the determination unit 21. Is output. When the output of the magnetic detection element 4 exceeds a predetermined level, the determination unit 21 determines that the hinged door 11 is in a closed state and outputs a closed state detection signal to the control unit 22. When the closed state detection signal is input, the control unit 22 controls the wireless communication unit 23 to transmit a closed state wireless signal to a security device (not shown) installed in the house.

  When the hinged door 11 in the closed state is moved in the opening direction (the direction of the arrow AR1 in FIG. 3), the magnetic field generating unit 2 moves to the indoor side, and the magnetic shield 6a moves to the magnetic sensing element 4, the yoke 7, and the magnetic field generating unit. It becomes the state which entered between two. The magnetic field generated by the magnetic field generator 2 is shielded by the magnetic shield 6a, and the magnetic flux passing through the magnetic sensing element 4 is reduced. When the magnetic flux passing through the magnetic detection element 4 falls below a predetermined value and the output of the magnetic detection element 4 falls below a predetermined level, the determination unit 21 determines that the hinged door 11 is in the open state and controls the open state detection signal. To the unit 22. When the open state detection signal is input, the control unit 22 controls the wireless communication unit 23 to cause the security device (not shown) installed in the home to transmit the open state wireless signal. When the security device receives the wireless signal in the open state, the security device detects the open state of the hinged door 11 and notifies it by sound or light.

  When the hinged door 11 moves in the opening direction from the closed position in this way, the magnetic shield 6a enters between the magnetic field generation unit 2 and the magnetic detection element 4, and travels from the magnetic field generation unit 2 to the yoke 7 or the magnetic detection element 4. The magnetic shield 6a shields the magnetic flux. Therefore, the magnetic flux passing through the yoke 7 or the magnetic sensing element 4 can be reduced with a smaller opening angle than in the case without the magnetic shield 6a. Therefore, since the magnetic flux passing through the yoke 7 or the magnetic sensing element 4 is reduced at a smaller opening angle and the output of the magnetic sensing element 4 is below a predetermined level, the control unit 22 opens the hinged door 11 at a smaller opening angle. The state can be detected.

  When the hinged door 11 is returned from the open state to the closed state, the magnetic flux of the magnetic field generator 2 is linked to the magnetic detection element 4 through the yoke 7 or the magnetic detection element 4. When a magnetic flux exceeding a predetermined value passes through the yoke 7 or the magnetic detection element 4 and links to the magnetic detection element 4, the magnetic detection element 4 outputs a signal exceeding a predetermined level to the determination unit 21. When the output of the magnetic detection element 4 exceeds a predetermined level, the determination unit 21 determines that the hinged door 11 is in the closed state, and outputs a closed state detection signal to the control unit 22. When the closed state detection signal is input, the control unit 22 controls the wireless communication unit 23 to transmit a closed state wireless signal to a security device (not shown) installed in the house.

  In addition, about the operation | movement which determines the opening / closing of the hinged door 11, it is the same also with the opening / closing detection apparatus 1 for fittings which is not provided with the yoke 7, but is provided only with a magnetic shield. In the joinery opening / closing detection apparatus 1 including only the magnetic shield, the magnetic shield shields the magnetic flux from the magnetic field generator 2 toward the magnetic detection element 4. Therefore, the magnetic flux passing through the magnetic sensing element 4 can be reduced with a smaller opening angle than in the case where there is no magnetic shield.

  In the opening / closing detection device 1 for joinery of the present embodiment, the magnetic field generating unit 2 is attached to the hinged door 11 and the sensor main body 3 is attached to the wall 13, but the sensor main body 3 is attached to the hinged door 11 as shown in FIG. The magnetic field generator 2 may be attached to the wall 13. The magnetic shield 6c is arranged on the hinged door 11 side (outdoor) with respect to the magnetic detection element 4. When the hinged door 11 opens to the indoor side (lower side in FIG. 10), the magnetic shield 6c enters between the magnetic sensing element 4 and the magnetic field generator 2, and the magnetism is shielded by the magnetic shield 6c. The open state can be detected by the opening amount.

  Moreover, the opening / closing detection apparatus 1 for joinery of this embodiment may be attached to the sliding door 14, as shown to Fig.11 (a) (b). The sliding door 14 includes two sliding doors 14a and 14b. The sliding door 14a is arranged on the left side of the opening in FIG. 11A, and the sliding door 14b is arranged on the right side of the opening in FIG. 11A, and the two sliding doors 14a and 14b are locked. It has become. The sliding door 14a is an outdoor sliding door, and is opened by being moved in the direction of the arrow AR2. The sliding door 14b is a sliding door on the indoor side, and is opened when moved in the direction of the arrow AR3.

  The sensor body 3 is attached to the left edge portion orthogonal to the arrow AR3 direction in the sliding door 14b. The magnetic field generator 2 is attached to the indoor surface of the sliding door 14a in the vicinity of the sensor body 3 in the closed state. The magnetic field generator 2 is attached so that the center position in the vertical direction is aligned with the position of the magnetic detection element 4. The sensor body 3 is attached so that the magnetic shield 6c is disposed on the side (in the direction of the arrow AR2) on which the magnetic field generation unit 2 moves relative to the magnetic detection element 4 when the sliding door 14a is opened. That is, it is arranged on the sliding door 14 b side with respect to the magnetic detection element 4 inside the housing 5. Therefore, even if the sliding door 14a is moved in the direction of the arrow AR2 to be in the open state, or the sliding door 14b is moved in the direction of the arrow AR3 to be in the opened state, the magnetic shield 6c shields the magnetism. Can detect the open state.

  Moreover, the opening / closing detection apparatus 1 for joinery of this embodiment may be attached to the sliding window 15 as shown in FIG. 12 other than a sliding door. The sliding window 15 includes two window frames 15a and 15b and windows 16 attached to the window frames 15a and 15b, respectively. Since the method of attaching the joinery opening / closing detection device 1 to the sliding window 15 is the same as that of the sliding door 14, the description thereof is omitted.

  In addition, the opening / closing detection apparatus 1 for joinery of this embodiment may be attached to a sliding door other than a sliding door. When attaching the joinery opening / closing detection device 1 to the sliding door, the sensor body 3 may be attached to the periphery of the opening provided on the wall, and the magnetic field generator 2 may be attached to the sliding door near the sensor body 3 in the closed state. Further, the magnetic field generator 2 may be attached around the opening provided on the wall, and the sensor main body 3 may be attached to the sliding door near the magnetic field generator 2 in the closed state.

  As described above, the opening / closing detection apparatus 1 for joinery of the present embodiment has the joinery (the hinged door 11, the sliding door 14, the sliding door) provided in the entrance / exit of the building (the opening 10 provided in the wall 13) or the window 16. This is an open / close detector for joinery that detects the open / closed state of the window 15). The opening / closing detection apparatus 1 for joinery includes a magnetic field generation unit 2, a sensor body 3, and magnetic shields 6a to 6c that shield magnetism, and is configured as follows. Either one of the magnetic field generation unit 2 and the sensor main body 3 is attached to a fitting (the hinged door 11, the sliding door 14, and the sliding window 15). The magnetic field generator 2 generates a magnetic field around it. The sensor body 3 houses a magnetic detection element 4 for detecting magnetism in a housing 5 and generates a magnetic field according to the opening and closing operations of the joinery (the sliding door 11, the sliding door 14, and the sliding window 15). The open / closed state of the joinery (the hinged door 11, the sliding door 14, and the sliding window 15) is detected from the change of. The magnetic shields 6a to 6c shield the magnetism, and the side on which the magnetic field generator 2 moves relative to the magnetic detection element 4 when the joinery (the hinged door 11, the sliding door 14, and the sliding window 15) is opened. Placed in.

  When the joinery (the hinged door 11, the sliding door 14, and the sliding window 15) is opened from a closed state, and the magnetic field generator 2 moves to a position where the magnetic shields 6a to 6c enter between the magnetic sensing element 4, a magnetic field is generated. The magnetic field generated by the unit 2 is shielded by the magnetic shields 6a to 6c. When the magnetic field generated by the magnetic field generator 2 is shielded by the magnetic shields 6a to 6c, the magnetic flux interlinked by the magnetic detection element 4 is reduced, so that it can be detected that the joinery has been opened. By arranging the magnetic shields 6a to 6c on the side where the magnetic field generating unit 2 moves relative to the magnetic detection element 4 when the joinery is opened, the magnetic detection area DF1 of the magnetic detection element 4 in the direction of opening the joinery. , DF3, DF4 (see FIG. 2B, FIG. 10 and FIG. 11B) are narrowed. Therefore, the sensor body 3 can detect the open state of the joinery (the hinged door 11, the sliding door 14, and the sliding window 15) with a smaller opening amount.

  It is also preferable that magnetic shields 6 a to 6 c are provided inside the housing 5. Since the magnetic shields 6a to 6c are inside the housing 5, the joinery opening / closing detection device 1 can be installed only by attaching the magnetic field generator 2 and the sensor body 3 to predetermined positions.

  It is also preferable that magnetic shields 6 a to 6 c are provided outside the housing 5. The magnetic shields 6a to 6c can be retrofitted to the sensor body 3 as necessary.

  The magnetic shield 6c is also preferably arranged so as to be parallel to the attachment surface to which the housing 5 is attached. Since the magnetic shield 6c is arranged so as to be parallel to the yoke 7, when the joinery (the hinged door 11, the sliding door 14, and the sliding window 15) is in the open state, the magnetic shield 6c is connected to the yoke 7 or The magnetic flux toward the magnetic sensing element 4 is shielded.

  The magnetic shields 6a and 6b are also preferably arranged so as to be orthogonal to the mounting surface to which the housing 5 is mounted. Since the magnetic shields 6a and 6b are arranged so as to be orthogonal to the mounting surface of the housing 5, when the joinery is in the open state, the magnetic shield along the mounting surface to which the housing 5 is mounted out of the magnetic flux of the magnetic field generator 2. The magnetic flux that enters the magnetic sensing element 4 from the opposite direction is shielded.

  It is also preferable that the magnetic shields 6a and 6b are provided so as to extend along both side surfaces of the housing 5 orthogonal to the mounting surface to which the housing 5 is attached. Since the magnetic shields 6a and 6b are respectively arranged on both sides of the magnetic detection element 4 in the direction along the mounting surface to which the housing 5 is attached, the sensor is provided on either the right side or the left side with respect to the magnetic field generating unit 2. The main body 3 can be attached.

  It is also preferable that the joinery opening / closing detection device 1 includes a yoke 7 (magnetic derivative) that guides the magnetic flux of the magnetic field generation unit 2 to the magnetic detection element 4. The yoke 7 (magnetic derivative) is provided on both sides (upper and lower sides) sandwiching the magnetic detection element 4 in the magnetic field detection direction (up and down direction) by the magnetic detection element 4, and the magnetic field detection direction as it moves away from the magnetic detection element 4. Is formed in a shape in which the width dimension in the direction intersecting with (the left-right direction) increases. Since more magnetic flux passes through the yoke 7 from the wide end of the yoke 7 and is linked to the magnetic sensing element 4 from the narrow end, the magnetic sensing element 4 is magnetically coupled to the magnetic field generating unit 2. Change is easier to detect.

  It is also preferable that the magnetic shields 6 a to 6 c are formed larger than the magnetic field introduction surface of the yoke 7. Each of the magnetic shields 6a to 6c is formed to be larger than the dimension between the upper and lower ends of the yoke 7 on both upper and lower sides (dimension L1 in FIG. 3B), and the upper and lower end portions protrude in the vertical direction. For this reason, the magnetic shields 6a to 6c can more easily shield the magnetic flux toward the yoke 7 or the magnetic sensing element 4.

  It is also preferable that the magnetic shields 6a and 6b and the yoke 7 (magnetic derivative) are integrally formed. Since the magnetic shields 6a and 6b and the yoke 7 are integrally formed, the distance between the magnetic shields 6a and 6b and the yoke 7 (the dimension in the front-rear direction of the gap 8) can be easily managed. In addition, since the magnetic shield and the magnetic derivative become one member, the assembly work of the sensor main body 3 becomes easier.

  Moreover, although the opening / closing detection apparatus 1 for joinery of this embodiment is equipped with the wireless communication part 23, it is not limited to providing communication functions, such as the wireless communication part 23, For example, the sensor main body 3 is a buzzer, a lighting device, etc. And the open state of the hinged door 11 may be notified to the surroundings.

(Embodiment 2)
The present embodiment is characterized by the configuration of the extension portion 12, and the configuration other than the extension portion 12 is the same as that of the first embodiment. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals. Description is omitted. The opening / closing detection device 1 for a joinery of the present embodiment is, for example, by extending the detectable area in the closing direction using the extension 12 while narrowing the detectable area by weakening the magnetic force of the magnetic field generating unit 2. The same detection area is realized.

  The yoke 7 (magnetic derivative) of this embodiment is provided with the extension part 12 which protrudes in the closing direction (outdoor side) of the hinged door 11 along the opening part 10, as shown to Fig.8 (a) (b). The extension 12 is made of a magnetic material having magnetic anisotropy (for example, a magnetic steel sheet, ferrite, permalloy, amorphous magnetic material, etc.). The extension portion 12 is formed in a rectangular plate shape that protrudes from the left side surface of the yoke 7 disposed on each of the upper and lower sides of the magnetic detection element 4 toward the magnetic field generation portion 2 of the hinged door 11 in the closed state. The extension 12 is made of the same material as the yoke 7 and is formed integrally with the yoke 7. The extension 12 is disposed between the hinged door 11 in the closed state and the end surface of the opening 10 along the end surface of the opening 10 in the wall 13. The extension part 12 is provided so as to protrude toward the magnetic field generation part 2 in a state in which the hinged door 11 is closed, so that the magnetic detection area DF2 (see FIG. 8B) of the sensor body 3 is greatly increased in the closing direction. Therefore, it is easier to detect the closed state of the hinged door 11.

  In the closed door 11 in the closed state, the magnetic field generator 2 is disposed near the left side of the extension 12, so that the magnetic flux of the magnetic field generator 2 can easily pass through the extension 12. Since the magnetic flux passing through the extension 12 is guided to the yoke 7 and interlinks with the magnetic detection element 4, even if the magnetic field generator 2 having a weak magnetic force is used, the hinged door 11 is linked to the magnetic detection element 4 in the closed state. The magnetic flux exceeds a predetermined value, and the determination unit 21 determines that the hinged door 11 is in a closed state.

  On the other hand, when the hinged door 11 is opened and the magnetic field generator 2 moves in the opening direction with respect to the magnetic sensing element 4, the magnetic flux interlinked with the magnetic sensing element 4 decreases and falls below a predetermined value. Is determined to be open.

  The extension portion 12 of the present embodiment is provided integrally with the yoke 7 and accommodated in the housing 5, but is formed separately from the yoke 7 as shown in FIGS. 9 (a) and 9 (b). And may be provided outside the housing 5. Even if the extension 12 is formed separately from the yoke 7 and provided outside the housing 5, the housing 5 is formed of a material that does not shield magnetism. Magnetically coupled. That is, the extension part 12 can be attached to the sensor body 3 by retrofitting.

  Moreover, as shown in FIGS. 9 (c) to 9 (e), the joinery opening / closing detection device 1 may include a magnetic shield 6 c that is arranged to be parallel to the mounting surface of the housing 5 with respect to the wall 13. . By providing the magnetic shield 6 c, in the open door 11 in the open state, the magnetic shield 6 c shields the magnetic flux of the magnetic field generator 2 and makes it difficult for the magnetic flux to pass through the yoke 7. The reliability of detecting the open / close state is further increased. The magnetic shield 6c may be disposed outside the housing 5.

  As described above, the yoke 7 (magnetic derivative) in the opening / closing detection device 1 for joinery of the present embodiment is provided so as to protrude toward the magnetic field generation unit 2 in a state where the joinery (the hinged door 11) is closed. An extension 12 is provided.

  The extension portion 12 is provided so as to protrude toward the magnetic field generation portion 2 in a state where the joinery (the hinged door 11) is closed, thereby closing the magnetic detection area DF2 (see FIG. 8B) of the sensor body 3. Since the direction is increased, the closed state of the joinery (the hinged door 11) can be detected. Therefore, even if the magnetic field generator 2 that generates a weaker magnetic field is used, the magnetic detection area DF2 is large in the closing direction of the joinery (the hinged door 11), so that the magnetic field generator 2 ensures the closed state of the joiner (the hinged door 11). Can be detected. Further, by using the magnetic field generator 2 that generates a weaker magnetic field or reducing the sensitivity of the magnetic detection element, the magnetic detection area DF2 in the opening direction of the joinery (the hinged door 11) can be further reduced. It is possible to detect the open state of a small open fitting (the hinged door 11).

  It is also preferable that a magnetic shield 6 c be provided outside the housing 5. The magnetic shield 6c can be retrofitted to the sensor body 3 as necessary.

  The magnetic shield 6c is also preferably arranged on the side where the magnetic field generator 2 moves relative to the magnetic sensing element 4 when the joinery (the hinged door 11) is opened. By providing the magnetic shield 6c, in the open joinery (the hinged door 11), the magnetic shield 6c shields the magnetic flux of the magnetic field generator 2 and makes it difficult for the magnetic flux to pass through the yoke 7. The reliability of detecting the open / closed state of the joinery (the hinged door 11) is further increased.

  In addition, in the opening / closing detection apparatus 1 for joinery of the present embodiment, the magnetic field generating unit 2 is attached to the hinged door 11 and the sensor main body 3 is attached to the wall 13, but conversely, the sensor main body 3 is attached to the hinged door 11 and the magnetic field. The generator 2 may be attached to the wall 13.

  The opening / closing detection device 1 for joinery of the present embodiment may include the magnetic shields 6a and 6b described in the first embodiment. Furthermore, the magnetic shield may be provided outside the housing 5, or the magnetic shield and the magnetic derivative may be integrated.

  Similarly to the first embodiment, the fitting opening / closing detection device 1 according to the present embodiment can be used by being attached to a sliding door or a sliding window. The method of attaching the joinery opening / closing detection device 1 to the sliding door and the sliding window is the same as in the first embodiment, and the extension 12 is a magnetic field in a state where the fitting (the sliding door and the sliding window) is closed. What is necessary is just to attach the sensor main body 3 so that it may protrude toward the generation | occurrence | production part 2. FIG. Similarly, the opening / closing detection device 1 for joinery of the present embodiment can be attached to the sliding door.

DESCRIPTION OF SYMBOLS 1 Opening / closing detection apparatus for joinery 2 Magnetic field generation part 3 Sensor body (magnetic detection part)
4 Magnetic sensing element 5 Housing 6a to 6c Magnetic shield 7 yoke (magnetic derivative)
8 Gap 9 Substrate 10 Opening 11 Sliding door (joint)
12 Extension 13 Wall 14 Sliding door (joint)
14a, 14b Sliding door 15 Sliding window (joint)
15a, 15b Window frame 16 Window 21 Judgment part 22 Control part 23 Wireless communication part AR1-AR3 Arrow DF1-DF4 Detection area L1-L4 Dimensions

Claims (6)

An open / close detection device for joinery that detects the open / closed state of the joinery provided at the entrance and window of the building,
A magnetic field generator for generating a magnetic field in the surroundings;
A magnetic detection unit for storing a magnetic detection element for detecting magnetism inside the housing;
A magnetic shield for shielding magnetism ;
A magnetic derivative for guiding the magnetic flux of the magnetic field generator to the magnetic sensing element ,
Either one of the magnetic field generator and the magnetic detection unit is attached to the fittings,
The magnetic detection unit is configured to detect an open / closed state of the joinery from a change in a magnetic field generated according to an opening operation and a closing operation of the joinery,
The magnetic shield does not shield the magnetic field generated by the magnetic field generation unit when the joinery is in a closed state and travels toward the magnetic detection unit, and the magnetic field generation unit when the joinery is in an open state. Is provided at a position where the generated magnetic field toward the magnetic detection unit is shielded ,
The magnetic derivative is provided on both sides of the magnetic detection element along the magnetic field detection direction of the magnetic detection element, and the width dimension in the direction intersecting the magnetic field detection direction increases as the distance from the magnetic detection element increases. The opening / closing detection apparatus for joinery characterized by being formed in the shape which becomes . The opening / closing detection apparatus for joinery according to claim 1, wherein the magnetic shield is formed larger than a magnetic field introduction surface of the magnetic derivative. The opening / closing detection apparatus for fittings according to claim 1, wherein the magnetic shield and the magnetic derivative are integrally formed. An open / close detection device for joinery that detects the open / closed state of the joinery provided at the entrance and window of the building,
A magnetic field generator for generating a magnetic field in the surroundings;
A magnetic detection unit for storing a magnetic detection element for detecting magnetism inside the housing;
Provided on both sides of the magnetic detection element along the magnetic field detection direction of the magnetic detection element, and formed so that the width dimension in the direction intersecting the magnetic field detection direction increases as the distance from the magnetic detection element increases. And a magnetic derivative for guiding the magnetic flux of the magnetic field generation unit to the magnetic sensing element,
Either one of the magnetic field generation unit and the magnetic detection unit is attached to the joinery,
The magnetic detection unit is configured to detect an open / closed state of the joinery from a change in a magnetic field generated according to an opening operation and a closing operation of the joinery,
The opening / closing detection apparatus for fittings according to claim 1, wherein the magnetic derivative includes an extension provided to protrude toward the magnetic field generation section when the fitting is closed. The opening / closing detection apparatus for fittings according to claim 4, wherein the extension part is provided outside the housing. 6. The fitting according to claim 4, further comprising a magnetic shield disposed on a side where the magnetic field generation unit moves relative to the magnetic sensing element when the fitting is opened. Open / close detection device.

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