JP2014062890A - Fitting door lock/unlock detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a permanent magnet while suppressing deterioration of the detection sensitivity.SOLUTION: A magnetic sensor unit 3 includes a pair of magnetic inductive members 31, 31 each disposed at a position opposing to each other being interposed by a magnetic sensor 30. With this, compared to the conventional case provided with no magnetic inductive members 31, the magnetic flux crossing the magnetic sensor 30 can be increased (magnetic flux density can be increased). As a result, even when a permanent magnet 1 which is smaller in dimension (smaller magnetic field) than a conventional magnet is used, the detection sensitivity equivalent to the conventional case is ensured. As a result, the size of the permanent magnet 1 can be reduced while suppressing the deterioration of the detection sensitivity.

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 the locking / unlocking of the lock that locks the fitting provided in the entrance / exit of the building, and is displaced between the locking position and the unlocking position. A permanent magnet attached to the operation piece of the lock and a magnetic detection unit attached to the joinery for detecting a magnetic field, wherein the magnetic detection unit detects a magnetic detection element and a magnetic flux of the permanent magnet. A magnetic derivative guided to the element, and the magnetic derivative is disposed on both sides of the magnetic sensing element along a magnetic field detection direction of the magnetic sensing element.

  In this join / unlock detection apparatus for joinery, it is preferable that 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.

  In this join / unlock detection apparatus for joinery, it is preferable that the magnetic derivative is made of a magnetic material having magnetic anisotropy and is arranged so that an easy magnetization direction coincides with the magnetic field detection direction.

  In this joinery locking / unlocking detection device, the device includes a determination unit that determines a displacement position of the operation piece in accordance with a magnetic field detected by the magnetic detection unit, and the determination unit determines the displacement position of the detection magnetic field. It is preferable to make the range determined to be the locked position narrower than the range determined to be the unlocked position.

  In this joinery locking / unlocking detection apparatus, when the determination unit receives a predetermined input or when the supply of power is started, the detection result of the magnetic detection unit when the displacement position is at least the locking position Is preferably stored.

  In this fitting / unlocking detection apparatus for joinery, the determination unit may determine that the joinery is open when a magnetic field detected by the magnetic detection unit is equal to or lower than a lower limit value of a range to be determined as the unlocking position. preferable.

  This lock / unlock detection apparatus for joinery includes a second permanent magnet attached to the joinery, and a second magnetic detection unit attached to the joinery for detecting a magnetic field, and the second magnetic detection unit includes a second magnetic sensor. A sensing element and a second magnetic derivative for guiding the magnetic flux of the second permanent magnet to the second magnetic sensing element, wherein the second magnetic derivative is arranged along the magnetic field sensing direction of the second magnetic sensing element. It is preferable to arrange on both sides of the second magnetic sensing element.

  In this joinery unlocking detection apparatus, the second magnetic detection unit is attached to the joinery in a direction in which the magnetic field detection direction of the second magnetic detection element is not the same as the magnetic field detection direction of the magnetic detection element. Is preferred.

  In this joinery unlocking detection apparatus, the second magnetic detection unit is attached to the joinery in a direction in which the magnetic field detection direction of the second magnetic detection element and the magnetic field detection direction of the magnetic detection element are perpendicular to each other. Is preferred.

  In this joinery locking / unlocking detection apparatus, it is preferable that the permanent magnet is disposed in an internal space of the operation piece formed in a box shape with one surface opened.

  In this joinery locking / unlocking detection device, a box is formed of a material that does not shield magnetism, and a casing that houses the permanent magnet therein, a string that connects the casing to the operation piece, and the casing It is preferable to provide a sticking member to be attached to the surface of the operation piece.

  In this joinery locking / unlocking detection apparatus, it is preferable that the housing is penetrated by an insertion hole through which the string body is inserted.

  In this joinery locking / unlocking detection apparatus, it is preferable that the casing is provided with a groove through which the string body passes on a surface opposite to a surface on which the sticking member is provided.

  In this join / unlock detection device for joinery, the string is preferably formed integrally with the housing by a synthetic resin material.

  In this join / unlock detection apparatus for joinery, it is preferable that the casing has a mark for aligning the relative position with the magnetic detection unit.

  In this joinery unlocking detection apparatus, it is preferable that the casing is provided with a display unit indicating that it is unlocked on a surface facing the indoor side when the operation piece is in the unlocked position. .

  In this join / unlock detection apparatus for joinery, it is preferable that one or more yokes are provided around the permanent magnet.

  Since the locking / unlocking detection apparatus for joinery of the present invention includes a magnetic derivative that guides the magnetic flux of the permanent magnet to the magnetic sensing element, there is an effect that the permanent magnet can be downsized while suppressing a decrease in detection sensitivity. .

Embodiment 1 of the locking / unlocking detection apparatus for joinery according to the present invention is shown, (a) is a perspective view partially omitted, and (b) is a plan view of a magnetic detection unit. It is a circuit block diagram same as the above. Embodiment 2 of the locking / unlocking detection apparatus for joinery according to the present invention is shown, (a) is a perspective view partially omitted, and (b) is a plan view of a magnetic detection unit. The magnet block same as the above is shown, (a) is a perspective view, (b) is sectional drawing. The magnet block in the same as above is shown, (a) is a front view, (b) is a side view. The magnet block of another structure same as the above is shown, (a) is a front view, (b) is a side view. It is the perspective view which abbreviate | omitted partially which shows Embodiment 3 of the locking / unlocking detection apparatus for joinery which concerns on this invention. It is the perspective view which abbreviate | omitted partially which shows another structure same as the above. (a), (b) is the top view which abbreviate | omitted partially which shows another structure 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. 1A, the crescent lock 100 is fixed to the crescent lock body 101 fixed to one window frame 110 of the two sliding-type window frames 110 and 111 and to the other window frame 111. And a crescent receiver 102. The crescent lock body 101 includes a rectangular parallelepiped base 103, a half-moon-shaped crescent portion 104 provided so as to be rotatable with respect to the base 103, and a rectangular shape whose one end is coupled to the crescent portion 104 and protrudes parallel to the base 103. And a box-shaped operation piece 105. The crescent portion 104 and the operation piece 105 are pivotally supported on the base 103 so as to be rotatable about the center of the crescent portion 104 as a fulcrum. 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. (See FIG. 1A). 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. In the following, as shown in FIG. 1A, the position of the operation piece 105 (position above the crescent portion 104) when the crescent lock 100 is in the locked state is “locking position”, and the crescent lock 100 is in the unlocked state. The position of the operation piece 105 at that time (position below the crescent portion 104) will be referred to as “unlocked position”.

(Embodiment 1)
The lock / unlock detection device for joinery (hereinafter, abbreviated as “detection device”) according to the present embodiment is provided on the indoor side surface of the permanent magnet 1 attached to the operation piece 105 and the window glass 112 supported by the other window frame 111. And a detector main body 2 to be attached.

  The permanent magnet 1 is attached to a position overlapping the rotation shaft on the side surface of the operation piece 105 by using a double-sided tape or the like, and one end side in the vertical direction in FIG. 1A is an N pole, and the other end is an S pole. It has become a magnetic pole. However, when the operation piece 105 is formed in a box shape that opens to one surface, it is preferable that the permanent magnet 1 is disposed in the internal space of the operation piece 105. In other words, the permanent magnet 1 is not exposed on the surface of the operation piece 105 by being housed in the operation piece 105, and the human hand (finger) is not touched when the operation piece 105 is operated. Thus, the displacement of the permanent magnet 1 can be prevented.

  As shown in FIGS. 1A and 2, the detection device main body 2 includes a magnetic detection unit 3, a determination unit 4, a control unit 5, a wireless communication unit 6, a battery 7 for power supply, a case 8 for storing these, and the like. It has. The magnetic detection unit 3 includes a magnetic sensor (magnetic detection element) 30 such as a Hall element and a pair of magnetic derivatives 31 that guide the magnetic flux of the permanent magnet 1 to the magnetic sensor 30 (see FIG. 1B). The magnetic sensor 30 is arranged in a direction in which the magnetic field (magnetic flux) detection direction coincides with the magnetic field direction of the permanent magnet 1 (vertical direction in FIG. 1). The magnetic sensor 30 is not limited to a Hall element, and may be a magnetoresistive element, a magnetic impedance element, or the like.

  The magnetic derivative 31 is formed in a thin plate shape with a magnetic material having magnetic anisotropy, for example, an electromagnetic steel plate, ferrite, permalloy, amorphous magnetic material, or the like. Here, in this embodiment, the magnetic derivative 31 is formed in a polygonal (hexagonal) shape that combines a rectangle and a trapezoid with one side of the rectangle as the bottom, as shown in FIG. Yes. The pair of magnetic derivatives 31 are arranged so that the upper base of the trapezoid faces the magnetic sensor 30 and faces the magnetic sensor 30 therebetween. That is, the magnetic derivative 31 is formed in a shape in which the width dimension in the direction (horizontal direction) intersecting the magnetic field detection direction (vertical direction in FIG. 1B) increases with distance from the magnetic sensor 30.

  The determination unit 4 determines the displacement position (locking position and unlocking position) of the operation piece 105 by performing signal processing on the detection output of the magnetic detection unit 3. For example, the wireless communication unit 6 performs wireless communication using radio waves as a medium with a security device (not shown) installed in the house. The control unit 5 transmits monitoring information (locked / unlocked state of the crescent lock 100) corresponding to the determination result of the determination unit 4 to the security device by a wireless signal transmitted from the wireless communication unit 6. Then, the security device acquires the detection result of the detection device, that is, the locked / unlocked state of the crescent lock 100 by receiving the radio signal, and notifies (displays) the result by sound or light. However, since such a security device and a security system including the security device and the detection device are well known in the art, detailed illustration of the configuration and description of the operation are omitted.

  The case 8 is made of a flat, rectangular parallelepiped synthetic resin molding, and is attached to the window glass 112 using a double-sided tape or the like. Further, the case 8 accommodates the magnetic detection unit 3 on one end side in the longitudinal direction (upper side in FIG. 1A), and two batteries (buttons) on the other end side in the longitudinal direction (lower side in FIG. 1A). Battery) 7 is housed. The determination unit 4, the control unit 5, and the wireless communication unit 6 are mounted on a printed wiring board (not shown) and housed in the case 8. Here, FIG. 1A shows a state in which a part of the case 8 is removed and exposed to the outside, but actually, the magnetic detection unit 3 and the battery 7 are not exposed to the outside.

  Next, the operation of the detection apparatus of this embodiment will be described. First, when the joinery (sliding door) is closed, the permanent magnet 1 attached to the operation piece 105 is close to the detection device main body 2, so that the magnetic lines of force (magnetic flux) of the permanent magnet 1 are the magnetic sensor 30. A detection output of a predetermined level is output from the magnetic detection unit 3. On the other hand, when the joinery is opened, the distance between the permanent magnet 1 and the detection device main body 2 becomes large, so that the absolute value of the detection output of the magnetic detection unit 3 becomes almost zero (however, the influence of geomagnetism is excluded). ). Therefore, the determination unit 4 can determine that the joinery is opened when the absolute value of the detection output of the magnetic detection unit 3 is equal to or less than the lower limit value close to zero.

  Further, as shown in FIG. 1A, when the displacement position of the operation piece 105 is the locking position, the magnetic lines of force (magnetic flux) from the N pole to the S pole of the permanent magnet 1 are linked downward to the magnetic sensor 30. On the other hand, when the displacement position of the operation piece 105 is the unlocked position, the lines of magnetic force are linked to the magnetic sensor 30 upward. That is, the polarity of the detection output of the magnetic sensor 30 (direction in which the lines of magnetic force are linked) differs by 180 degrees depending on the displacement position of the operation piece 105. Therefore, the determination unit 4 can determine the displacement position of the operation piece 105 based on the polarity of the detection output of the magnetic detection unit 3.

  Here, in the magnetic detection unit 3, a pair of magnetic derivatives 31 and 31 are arranged at positions facing each other with the magnetic sensor 30 interposed therebetween. For this reason, the magnetic flux linked to the magnetic sensor 30 can be increased (the magnetic flux density is increased) compared to the case where the magnetic derivative 31 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. In addition, the magnetic derivative 31 is formed in a shape in which the width dimension in the direction (horizontal direction) intersecting the magnetic field detection direction (vertical direction in FIG. 1B) increases with distance from the magnetic sensor 30. Therefore, since the magnetic flux entering from the wide end of the magnetic derivative 31 can be linked to the magnetic sensor 30 from the narrow end, the detection sensitivity of the magnetic sensor 30 can be improved. When the magnetic derivative 31 is made of a magnetic material having magnetic anisotropy, the magnetic derivative 31 is arranged so that the easy magnetization direction matches the magnetic field detection direction of the magnetic sensor 30. The detection sensitivity can be further improved.

  As described above, since the detection device of the present embodiment includes the magnetic derivative 31 that guides the magnetic flux of the permanent magnet 1 to the magnetic sensor 30, the permanent magnet 1 can be reduced in size while suppressing a decrease in detection sensitivity. . In addition, it is preferable that the determination part 4 narrows the range which determines the detection magnetic field range which determines the displacement position of the operation piece 105 as a locking position rather than the range which determines as an unlocking position. For example, as a determination condition, not only the direction of the magnetic flux but also that the absolute value of the detection output of the magnetic detection unit 3 is equal to or greater than a predetermined reference value, the reference value in the lock position determination condition is set to the unlock position determination condition. It is set higher than the reference value in. This reduces the possibility that the operation piece 105 is erroneously determined to be in the locked position when it is not in the locked position.

(Embodiment 2)
The detection device of the present embodiment includes a magnet block 10 and a detection device body 2 as shown in FIG. In addition, the same code | symbol is attached | subjected to the same component as Embodiment 1, and description is abbreviate | omitted.

  As shown in FIG. 4, the magnet block 10 is formed in a box shape from a material that does not shield magnetism (for example, synthetic resin), and includes a housing 11 that houses the permanent magnet 1 and a yoke 14 inside, and a housing. A string body 12 for connecting the body 11 to the operation piece 105 and an attaching member 13 for attaching the housing 11 to the surface of the operation piece 105 are provided.

  The casing 11 is composed of a rectangular box-shaped body 11A having one surface opened (the lower surface in FIG. 4) and a rectangular plate-shaped cover 11B coupled to the body 11A so as to close the opening. Further, the housing 11 has an insertion hole 11C through which the string body 12 is inserted, penetrating in the left-right direction. The string body 12 includes a binding band for binding electric cables and the like. However, the string body 12 is not limited to a binding band, and may be an adhesive tape, a self-bonding tape, a heat shrinkable tube, or the like.

  The affixing member 13 is made of, for example, a conventionally known double-sided tape, and affixed to the bottom surface of the casing 11 (the lower surface in FIG. 4).

  The yoke 14 is formed into a plate shape by a ferromagnetic material such as an iron plate, and is disposed between the inner bottom of the housing 11 and the permanent magnet 1 and between the permanent magnet 1 and the cover 11B. By arranging the yoke 14 around the permanent magnet 1 in this way, the magnetic flux of the permanent magnet 1 can be efficiently linked to the magnetic sensor 30 of the magnetic detection unit 3. Can be achieved.

  Thus, after the other side of the affixing member 13 affixed to the housing 11 on one side is affixed to the side surface of the operation piece 105 (the surface facing the window glass 112), the string 12 is attached to the operation piece 105. The magnet block 10 can be firmly attached to the operation piece 105 by being wound around and bound (see FIG. 3A). However, it is desirable that the sticking member 13 is stuck on the operation piece 105 to temporarily fix the magnet block 10 and after confirming that the detection device main body 2 can detect normally, the string body 12 is bound and finally fixed.

  Here, as shown in FIG. 5B, if a mark M for aligning the relative position with the magnetic detection unit 3 is provided on the side surface of the housing 11, the work of attaching the magnet block 10 to the operation piece 105 is performed. In addition, the workability of attaching the detection device main body 2 to the window glass 112 can be improved. Further, as shown in FIG. 5 (a), a display portion 11D indicating the unlocked state is provided on the surface (upper surface in FIG. 4) facing the indoor side when the operation piece 105 is in the unlocked position. May be. If such a display unit 11D is provided, the displacement position of the operation piece 105 can be easily determined from the indoor side. Note that such a display unit 11D includes, for example, a seal printed with characters “unlocked”.

  On the other hand, when the operation piece 105 is in the locked position, the detection device main body 2 has an indoor side of the window glass 112 so that the magnetic detection unit 3 faces the magnet block 10 attached to the operation piece 105 in close proximity. (See FIG. 3A). However, the magnetic detection unit 3 in the present embodiment is arranged so that the magnetic field detection direction of the magnetic sensor 30 is oriented in the short direction of the case 8 (left and right direction in FIG. 3), and the pair of magnetic derivatives 31 are also included in the case 8. It is arranged on both sides of the magnetic sensor 30 along the short direction.

  Next, the operation of the detection apparatus of this embodiment will be described. First, as shown in FIG. 3A, when the displacement position of the operation piece 105 is the locking position, the permanent magnet 1 attached to the operation piece 105 is close to the detection device main body 2. Magnetic field lines (magnetic flux) are linked to the magnetic sensor 30, and a detection output whose absolute value exceeds a predetermined threshold value is output from the magnetic detection unit 3. On the other hand, when the displacement position of the operation piece 105 is the unlocked position, the distance between the permanent magnet 1 and the detection device main body 2 is increased, so that the absolute value of the detection output of the magnetic detection unit 3 is equal to or less than the threshold value. Therefore, the determination unit 4 determines the locked position (locked state) when the absolute value of the detection output of the magnetic detection unit 3 exceeds a predetermined threshold value, and the absolute value of the detection output is less than the threshold value. In this case, it can be determined that the position is unlocked (unlocked state). However, the determination unit 4 sets the determination condition for determining the displacement position of the operation piece 105 to be stricter than the unlocking position determination condition, that is, the threshold value is set relatively high. It is preferred that This reduces the possibility that the operation piece 105 is erroneously determined to be in the locked position when it is not in the locked position. Note that the determination unit 4 compares the lower limit value that is smaller than the threshold value and close to zero with the absolute value of the detection output of the magnetic detection unit 3, and if the absolute value of the detection output is less than or equal to the lower limit value, You may determine with open.

  By the way, the detection output of the magnetic detection unit 3 corresponding to the displacement position of the operation piece 105 varies depending on the relative positional relationship between the permanent magnet 1 attached to the operation piece 105 and the detection device main body 2 attached to the window glass 112. Probability is high. When the variation in the detection output of the magnetic detection unit 3 is large, the absolute value of the detection output of the magnetic detection unit 3 becomes equal to or less than the threshold value even when the displacement position of the operation piece 105 is the locked position. May be erroneously determined as the unlocked position.

  Therefore, a tact switch (not shown) is provided in the detection device main body 2, and when the tact switch is pushed, the determination unit 4 stores the detection output of the magnetic detection unit 3 in a memory (nonvolatile semiconductor memory). Is preferred. That is, after the construction of the detection device is completed, the detection output of the magnetic detection unit 3 when the displacement position of the operation piece 105 is set to the locked position is stored in the memory, and the determination unit 4 uses the detection output stored in the memory as a reference. A threshold value may be set. For example, when the detection output stored in the memory is 100%, a level of 75% may be set as the threshold value. Thereby, the misjudgment resulting from the dispersion | variation in the relative positional relationship of the permanent magnet 1 and the detection apparatus main body 2 can be reduced. Not only the lock position detection output but also the unlock position detection output may be stored in the memory, and the threshold value may be set based on both detection outputs. Further, not only when a predetermined input is received (when the tact switch is pressed), the determination unit 4 stores the detection output in the memory when the battery 7 is installed and the supply of power is started. Also good.

  By the way, in this embodiment, the case 11 and the string 12 of the magnet block 10 are configured as separate parts. However, if the case 11 and the string 12 are integrally formed of a synthetic resin material, the number of parts is reduced. It can be reduced to simplify construction work and reduce costs.

  Further, the housing 11 may be provided with a groove 11E through which the string body 12 passes on the surface opposite to the surface to which the attaching member 13 is attached, instead of the insertion hole 11C (see FIG. 6). In other words, the casing 11 is permanently fixed to the operation piece 105 by binding the string body 12 passed through the groove 11E to the operation piece 105.

(Embodiment 3)
As shown in FIG. 7, the detection device of the present embodiment includes a second permanent magnet 1B attached to the joinery (window frame 110) and a second magnetic detector 3B attached to the joinery (window glass 112) to detect a magnetic field. With. In addition, the same code | symbol is attached | subjected to the same component as Embodiment 1 or Embodiment 2, and description is abbreviate | omitted. The permanent magnet 1 attached to the operation piece 105 is referred to as a first permanent magnet 1A.

  The second magnetic detection unit 3B includes a second magnetic detection element (second magnetic sensor) 30B and a second magnetic derivative 31B that guides the magnetic flux of the second permanent magnet 1B to the second magnetic sensor 30B. Further, the second magnetic derivative 31B is disposed on both sides of the second magnetic sensor 30B with the second magnetic sensor 30B sandwiched along the magnetic field detection direction of the second magnetic sensor 30B.

  The case 8 of the present embodiment is longer in the longitudinal direction (vertical direction in FIG. 7) than the case 8 of the first embodiment, and the second magnetic detection unit 3B is accommodated above the two batteries 7. Yes. In the following description, the magnetic detection unit 3 housed below the two batteries 7 in the case 8 is referred to as a first magnetic detection unit 3A, and the magnetic sensor 30 and the magnetic derivative 31 of the first magnetic detection unit 3A. Are referred to as a first magnetic sensor 30A and a first magnetic derivative 31A, respectively. Similarly to the first embodiment, the determination unit 4, the control unit 5, and the wireless communication unit 6 are mounted on a printed wiring board (not shown) and stored in the case 8. Further, FIG. 7 shows a state in which a part of the case 8 is removed and exposed to the outside, but actually, the first and second magnetic detection units 3A and 3B and the battery 7 are not exposed to the outside.

 Next, the operation of the detection apparatus of this embodiment will be described.

  First, as shown in FIG. 7, when the joinery (sliding door) is closed, the second permanent magnet 1 </ b> B attached to the window frame 110 is approaching the detection device main body 2. For this reason, the magnetic field lines (magnetic flux) of the second permanent magnet 1B are linked to the second magnetic sensor 30B, and a detection output of a predetermined level is output from the second magnetic detection unit 3B. On the other hand, when the joinery is opened, the distance between the second permanent magnet 1B and the detection device main body 2 becomes large, so that the absolute value of the detection output of the second magnetic detection unit 3B becomes almost zero (however, the geomagnetism Excludes impact.) Therefore, the determination unit 4 can determine that the joinery is open when the absolute value of the detection output of the second magnetic detection unit 3B is equal to or less than a predetermined lower limit (for example, a value close to zero).

  That is, the detection apparatus of Embodiments 1 and 2 detects the opening / closing state of the fitting and the detection of the locking / unlocking state of the crescent lock 100 by one permanent magnet 1 (first permanent magnet 1A) and one magnetic detection unit 3 ( The first magnetic detection unit 3A) is configured to be shared. In contrast, the detection device of the present embodiment detects the locked / unlocked state of the crescent lock 100 with the first permanent magnet 1A and the first magnetic detection unit 3A, and detects the open / closed state of the fitting with the second permanent magnet 1B and The second magnetic detection unit 3B is configured to perform the operation. For this reason, in the detection apparatus of this embodiment, compared with the detection apparatus of Embodiment 1, 2, there exists an advantage that the detection accuracy of the opening / closing state of a fitting can be improved.

  Here, also in the 2nd magnetic detection part 3B, a pair of 2nd magnetic derivatives 31B and 31B are arrange | positioned in the position which opposes on both sides of the 2nd magnetic sensor 30B. For this reason, compared with the case where there is no magnetic derivative 31B, the magnetic flux linked with the 2nd magnetic sensor 30B can be increased (magnetic flux density is enlarged). As a result, the desired detection sensitivity can be maintained even when the permanent magnet 1B having a relatively small size (weak magnetic field) is used. The second magnetic derivative 31B is formed in a shape in which the width dimension in the direction (left-right direction) intersecting the magnetic field detection direction (up-down direction in FIG. 7) increases with distance from the second magnetic sensor 30B. Accordingly, since the magnetic flux entering from the wide end of the second magnetic derivative 31B can be linked to the second magnetic sensor 30B from the narrow end, the detection sensitivity of the second magnetic sensor 30B can be improved. it can. When the second magnetic derivative 31B is made of a magnetic material having magnetic anisotropy, the second magnetic derivative 31B is arranged so that the easy magnetization direction coincides with the magnetic field detection direction of the second magnetic sensor 30B. As a result, the detection sensitivity of the second magnetic sensor 30B can be further improved.

  In addition, when the displacement position of the operation piece 105 is the locking position as shown in FIG. 7, as described in the second embodiment, the determination unit 4 determines the operation piece based on the polarity of the detection output of the first magnetic detection unit 3A. 105 displacement positions can be determined.

  As described above, the detection device of the present embodiment includes the second permanent magnet 1B attached to the joinery 110 and the second magnetic detection unit 3B attached to the joinery 112 and detecting a magnetic field. The second magnetic detection unit 3B includes a second magnetic detection element 30B and a second magnetic derivative 31B that guides the magnetic flux of the second permanent magnet 1B to the second magnetic detection element 30B. Further, the second magnetic derivative 31B is disposed on both sides of the second magnetic sensing element 30B along the magnetic field detection direction of the second magnetic sensing element 30B.

  Therefore, according to the detection device of the present embodiment, compared with the detection devices of Embodiments 1 and 2, it is possible to increase the accuracy of detecting the open / close state of the joinery, and to suppress the decrease in detection sensitivity, the second permanent. The magnet 1B can be downsized.

  Here, the second magnetic detection unit 3B is attached to the fitting 112 so that the magnetic field detection direction (vertical direction) of the second magnetic detection element 30B and the magnetic field detection direction (horizontal direction) of the magnetic detection element 30A are not the same. It is preferred that In particular, as in the detection device of the present embodiment, the second magnetic detection unit 3B has a magnetic field detection direction (vertical direction) of the second magnetic detection element 30B and a magnetic field detection direction (horizontal direction) of the magnetic detection element 30A. It is preferably attached to the joinery 112 in a vertical orientation. If it does in this way, the influence which the magnetic field of the 1st permanent magnet 1A gives to the 2nd magnetism detection part 3B, and the influence which the magnetic field of the 2nd permanent magnet 1B gives to the 1st magnetism detection part 3A can be controlled.

  By the way, as shown in FIG. 8, the detection device main body 2 may be attached to the window frame 110 and the second permanent magnet 1 </ b> B may be attached to the window glass 112. Further, as shown in FIG. 8, the battery 7 is stored in the uppermost part of the case 8, the first magnetic detector 3 </ b> A is stored in the lowermost part of the case 8, and the second magnetic detector 3 </ b> B is stored in the case 8. It may be configured to be stored below.

  Further, as shown in FIG. 9A, the detection device main body 2 may be accommodated in the base 103 of the crescent lock main body 101. Alternatively, as shown in FIG. 9B, the detection device main body 2 may be housed inside the window frame 110. If such a structure is employ | adopted, the detection apparatus main body 2 can be arrange | positioned, without impairing the external appearance of joinery.

DESCRIPTION OF SYMBOLS 1 Permanent magnet 2 Detection apparatus main body 3 Magnetic detection part
30 Magnetic sensor (Magnetic sensing element)
31 Magnetic derivatives

Claims (17)

A locking / unlocking detection device for a joinery for detecting locking / unlocking of a lock for locking a fitting provided at a doorway or a window of a building, wherein the permanent magnet is attached to an operation piece of the lock that is displaced between the locking position and the unlocking position. And a magnetic detection unit that is attached to the joinery and detects a magnetic field,
The magnetic detection unit includes a magnetic detection element and a magnetic derivative that guides the magnetic flux of the permanent magnet to the magnetic detection element, and the magnetic derivative is arranged along the magnetic field detection direction of the magnetic detection element. A lock / unlock detection device for joinery, which is disposed on both sides of the door.   2. The lock / unlock detection apparatus for joinery according to claim 1, wherein the magnetic derivative is formed in a shape in which a width dimension in a direction intersecting the magnetic field detection direction increases with distance from the magnetic detection element.   The lock / unlock detection apparatus for joinery according to claim 1 or 2, wherein the magnetic derivative is made of a magnetic material having magnetic anisotropy, and is arranged such that an easy magnetization direction coincides with the magnetic field detection direction. .   A determination unit configured to determine a displacement position of the operation piece according to a magnetic field detected by the magnetic detection unit; and the determination unit determines a range of the detection magnetic field for determining the displacement position as the unlocked position. 4. The joinery lock detection apparatus according to claim 1, wherein a range to be determined as the locking position is narrower than a range to be locked.   The said determination part memorize | stores the detection result of the said magnetic detection part when the said displacement position exists in the said locked position at least, when supply of a predetermined | prescribed input is received or supply of a power supply is started. Item 5. A lock / unlock detection apparatus for joinery according to item 4.   The said determination part determines with the said fitting being open | released, when the magnetic field which the said magnetic detection part detects is below the lower limit of the range which determines with the said unlocking position. Lock / unlock detection device for joinery. A second permanent magnet attached to the joinery, and a second magnetic detection unit attached to the joinery for detecting a magnetic field,
The second magnetic sensing unit includes a second magnetic sensing element and a second magnetic derivative that guides the magnetic flux of the second permanent magnet to the second magnetic sensing element, and the second magnetic derivative is the second magnetic derivative. It is arrange | positioned at the both sides which pinched | interposed the said 2nd magnetic detection element along the magnetic field detection direction of a magnetic detection element, The locking / unlocking detection apparatus for joinery of any one of Claims 1-6 characterized by the above-mentioned.   The said 2nd magnetic detection part is attached to the said fitting with the direction from which the magnetic field detection direction of the said 2nd magnetic detection element and the magnetic field detection direction of the said magnetic detection element do not become the same. Locking detection device for joinery.   The said 2nd magnetic detection part is attached to the said fitting with the direction in which the magnetic field detection direction of the said 2nd magnetic detection element and the magnetic field detection direction of the said magnetic detection element become perpendicular | vertical. Locking detection device for joinery.   The said permanent magnet is arrange | positioned in the internal space of the said operation piece currently formed in the box shape which one side opens, The locking / unlocking detection apparatus for joinery of any one of Claims 1-9 characterized by the above-mentioned. .   Formed in a box shape with a material that does not shield magnetism, a casing that houses the permanent magnet therein, a string that binds the casing to the operation piece, and affixing the casing to the surface of the operation piece A fitting / unlocking detection apparatus for joinery according to any one of claims 1 to 9, comprising a member.   The fitting lock / unlock detection device according to claim 11, wherein the casing has an insertion hole through which the string body is inserted.   The lock / unlock detection device for joinery according to claim 11, wherein the casing is provided with a groove through which the string body is provided on a surface opposite to a surface on which the sticking member is provided.   The said lock body is integrally formed with the said housing | casing with a synthetic resin material, The locking / unlocking detection apparatus for joinery of any one of Claims 11-13 characterized by the above-mentioned.   The said housing | casing has a mark for aligning a relative position with the said magnetic detection part, The locking / unlocking detection apparatus for joinery of any one of Claims 11-14 characterized by the above-mentioned.   16. The display device according to claim 11, wherein the casing is provided with a display unit indicating an unlocked state on a surface facing the indoor side when the operation piece is in the unlocked position. The join / unlock detection device for joinery according to claim 1.   The join / unlock detection device for joinery according to any one of claims 10 to 16, wherein one or more yokes are provided around the permanent magnet.

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