JP2013040466A - Locking detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking detection device for a crescent lock or the like, for reliably detecting a locking state while achieving a smaller size and a lower cost by enabling power supply to a detection element by wire from the outside while eliminating the need for power supply to a window body or the like.SOLUTION: A locking detection device 1 is provided for a lock mechanism which can lock a movable body 4 into a closing state with the operation of a lever 25 provided on the movable body 4 capable of opening/closing an opening part. The movable body 4 is provided with a magnet 26 to be moved with the operation of the lever 25, and a pair of yokes 27, 28 extending from a position near the magnet 26 to the end of the movable body 4. Base ends 27a, 28a of the yokes are provided so as to face both magnetic poles of the magnet 26 within a range of the moving track of the magnetic pole of the magnet 26. On a frame body 2 forming the opening part, a magnetic detection element 41 is provided for detecting a magnetic field between front ends 27b, 28b of the yokes.

Description

  The present invention relates to a lock detection device such as a window that can be locked in a closed state by operating a lever such as a crescent lock.

The crescent lock is provided at a substantially intermediate position in the height direction of the vertical fence such as the sliding window, and by locking the hook portion of the other window body with a half-moon shaped lock piece attached to one window body, The window can be locked closed.
Among such windows equipped with a lock mechanism using a crescent lock, those provided with a device for detecting the lock are widely used for the purpose of crime prevention.
In the window described in Patent Document 1, a detection unit including a magnetic detection element including a reed switch, a light emitting element, and a light receiving element is provided on a vertical shaft of a window near the crescent lock, and a lever of the crescent lock is provided on the lever. A magnet is provided, and when the lever is operated, movement of the magnet is detected by the magnetic detection element, and reflected light from the other window of the light emitted from the light emitting element is detected by the light receiving element. These detection signals are transmitted to an external receiver by an output transmitter built in the detection unit. As the power source, a lithium battery, a solar battery or the like is used.

In Patent Document 2, magnets are provided at the summit portions of the crescent lock and the vertical shaft of the window body, and two reed switches that operate as the magnets move are connected in series and connected to the circuit. The coil in the state and the coil placed on the frame are arranged opposite to each other, and the electromagnetic induction between these coils causes the operation of the crescent lock and the relative position of the summit portion of the vertical shaft of the window that is attracted by the operation of the crescent lock. It is configured to detect both movement. In Patent Document 3, the operation of the crescent lock is detected using a magnet and a coil, and a lithium battery is incorporated as a power source.
Patent Documents 4 and 5 disclose a power source for signal transmission from the open / close detection device, which includes a power generation device that is activated by the operation of a crescent lock.

JP-A 64-17980 JP-A-1-163380 Japanese Patent Laid-Open No. 10-611273 JP 2005-139627 A JP 2007-63773 A

  By the way, the crescent lock is provided at an intermediate position in the height direction of the vertical shaft of the window body that can be moved with high frequency, and it is difficult to supply power from the outside by wire. For this reason, it is necessary to incorporate a battery as described in Patent Document 1 or Patent Document 4 or to provide a power generation device as described in Patent Document 5. Incorporation of a battery requires battery replacement and the like, and the provision of a power generation device leads to an increase in size and cost. In the case of the structure described in Patent Document 3, it is not necessary to provide a power source or the like for the window body, but it is difficult to reduce the size of the coil, and because of detection by electromagnetic induction, it may not be detected in the case of slow movement. is there.

  The present invention has been made in view of such circumstances, and reliably detects the locked state and makes it possible to supply power to the detection element from outside while making power supply to the window body unnecessary, An object of the present invention is to provide a lock detection device such as a crescent lock that can be reduced in size and cost.

  The lock detection device according to the present invention is a lock detection device provided in a lock mechanism capable of locking the movable body in a closed state by operating a lever provided on the movable body capable of opening and closing an opening. The body is provided with a magnet that is moved by the operation of the lever and a pair of yokes that extend from the vicinity of the magnet to the end of the movable body, and the base end of these yokes is the magnetic pole of the magnet A magnetic detecting element is provided so as to face both magnetic poles in a partial range of the movement locus, and a magnetic body that detects a magnetic field between the tip portions of the yoke is provided on the frame forming the opening. And

  When the magnet is moved by operating the lever, the yoke is opposed to the magnetic pole in a part of the moving locus, and a magnetic field is generated between the end portions of the yoke at the end of the movable body. When the magnet moves away from the position facing the yoke, the magnetic field between the tip ends of the yoke at the end of the movable body also decreases. The locked state can be detected by detecting the change of the magnetic field between the tip portions of the yoke by the magnetic detection element. In this case, since only the magnet and the yoke are disposed on the movable body, it is not necessary to supply power from the outside, and the magnetic detection element is provided on the frame body fixed to the housing or the like. Wired power supply is possible. Therefore, it is not necessary to incorporate a battery or the like in the movable body, and it is possible to reduce the size and only incorporate a magnet and a yoke. Therefore, it is possible to reduce the thickness of the movable body without increasing the thickness. When the movable body is a window, a door or the like, the design property is not impaired.

As the movable body, a sliding-type window or door, a double door, or the like can be targeted.
The lever can be held in the locked state and unlocked state by turning, such as the Crescent lock or thumb-turn lock described above, and can be locked and locked by sliding instead of turning. The present invention can also be applied to those that can be held in two states, that is, a released state. Also in the case of this slide type, the magnet may be arranged so that the magnetic pole of the magnet faces the yoke in a part of the linear movement locus.
As the magnetic detection element, any one of a magnetoresistive element such as a reed switch, a Hall element, an MI element, an MR element, a GMR element, and a TMR element can be used. Further, the magnetic detection element may be capable of detecting a magnetic field not only in one axis direction but also in two or three axis directions of the X, Y, and Z axes.

  According to the locking detection device of the present invention, the locked state can be reliably detected, and the change in the magnetic field accompanying the operation of the lever is transmitted to the end of the movable body by the yoke, and is provided on the frame surrounding the movable body. Since it is detected by a magnetic detecting element and it is not necessary to incorporate a battery or the like in the movable body, it can be reduced in size and thickness and has excellent design.

It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the lock release state of the crescent lock in the window incorporating the locking detection apparatus of 1st Embodiment of this invention. It is the cross-sectional view which abbreviate | omitted a part along the AA line of FIG. It is a front view of the window of FIG. It is the front view which made a part of crescent lock in alignment with the BB line of FIG. 1 the cross section. It is a graph which shows the relationship between the external magnetic field and output voltage of a magnetic detection element in the lock release state shown in FIG. It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the state which rotated the lever of the crescent lock to the horizontal attitude | position in 1st Embodiment. It is a graph which shows the relationship between the external magnetic field and output voltage of a magnetic detection element in the state shown in FIG. It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the locked state of a crescent lock in 1st Embodiment. It is a graph which shows the relationship between the external magnetic field and output voltage of a magnetic detection element in the locked state shown in FIG. It is the longitudinal cross-sectional view similar to FIG. 1 which abbreviate | omitted one part which shows the lock release state of the crescent lock in the window incorporating the locking detection apparatus of 2nd Embodiment of this invention. FIG. 11 is a cross-sectional view similar to FIG. 2, omitting a portion along the line CC in FIG. 10. It is a graph which shows the relationship between the external magnetic field and output voltage of a magnetic detection element in the lock release state shown in FIG. 10, (a) shows X direction, (b) shows Y direction. It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the state which rotated the lever of the crescent lock to the horizontal attitude | position in 2nd Embodiment. It is the same graph as FIG. 12 which shows the relationship between the external magnetic field of a magnetic detection element in the state shown in FIG. 13, and an output voltage. It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the locked state of a crescent lock in 2nd Embodiment. It is the cross-sectional view which abbreviate | omitted a part shown by the DD line | wire of FIG. FIG. 16 is a graph similar to FIG. 12 showing the relationship between the external magnetic field and output voltage of the magnetic detection element in the locked state shown in FIG. 15. It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows an empty state in 2nd Embodiment. It is the cross-sectional view which abbreviate | omitted a part along the EE line of FIG. It is the same graph as FIG. 12 which shows the relationship between the external magnetic field and output voltage of a magnetic detection element in the empty state shown in FIG. It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the other empty state in 2nd Embodiment. It is the cross-sectional view which abbreviate | omitted a part along the FF line of FIG. It is the same graph as FIG. 12 which shows the relationship between the external magnetic field and output voltage of the magnetic detection element in the empty state shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings.
FIGS. 1-9 has shown the example which incorporated the locking detection apparatus 1 of 1st Embodiment of this invention in the sliding window. This window includes a rectangular frame 2 fixed to a building frame, and two sliding door type windows (movable bodies) 3 and 4 accommodated in the frame 2.

  The frame 2 is constituted by an upper frame 5, a lower frame 6, and a pair of vertical frames 7 arranged on the left and right sides thereof, and these frame members are made of, for example, an extruded shape of an aluminum alloy. Each of the window bodies 3 and 4 has a configuration in which a window glass 12 is fitted inside a frame frame 9 including an upper rod 9 and a lower rod 10 and a pair of vertical rods 11 arranged on the left and right sides thereof. Between the rails 13 and 14 that are formed in parallel on the upper frame 5 and the lower frame 6, the window bodies 3 and 4 are arranged in a staggered manner one by one on the indoor side and on the outdoor side. Each of the brazing members of the window bodies 3 and 4 is also made of, for example, an aluminum alloy extruded shape.

When the window bodies 3 and 4 are closed, the vertical hooks 11 on the summing side of the window bodies 3 and 4 and the ends of the upper hook 9 and the lower hook 10 to which both ends of the vertical hooks 11 are connected are connected. They are arranged so as to overlap each other in the thickness direction of the window bodies 3 and 4. And the crescent lock 21 is provided in the height direction intermediate position of the vertical hook which overlaps in this closed state.
The crescent lock 21 is composed of a half-moon-shaped lock piece 23 attached to the indoor window body 4 so as to be rotatable about a shaft 22 and a hook portion 24 attached to the outdoor window body 3. A lever 25 is formed integrally with the lock piece 23 so as to protrude outward in the radial direction, and the lock piece 23 is rotated by operating the lever 25, and a part of the lever 25 is engaged with the hook portion 24. The closed state of the window bodies 3 and 4 is locked, and the lock state is released by retracting a part of the lock piece 23 from the hook portion 24.

  In the example shown in the figure, the lever 25 is rotated by approximately 180 ° from the vertically downward posture to the vertically upward posture. When the lever 25 is in the vertically downward posture, the lever 25 is in the unlocked state, and when the lever 25 is in the horizontal posture. At the same time, the tip of the lock piece 23 starts to engage with the hook portion 24, and the lever 25 is rotated to the vertically upward position, whereby the lock piece 23 is deeply engaged with the hook portion 24 and a lock state is established.

A magnet 26 fixed to the end of the horizontal shaft 22 is accommodated in the vertical shaft 11 provided with the lock piece 23 of the crescent lock 21. The magnet 26 is formed in a rod shape having magnetic poles at both ends, is fixed orthogonally to the shaft 22, and is rotated integrally with the shaft 22. In the illustrated example, when the lever 25 is disposed in a vertically downward posture, both the magnetic poles of the magnet 26 are disposed in the horizontal direction.
A pair of yokes 27 and 28 are fixed to the outside of the magnet 26 in the radial direction. The yokes 27 and 28 are made of a ferromagnetic material such as iron, nickel, cobalt, or an alloy thereof. It extends from the position near the magnet 26 to the upper end portion of the vertical rod 11.

The base end portions 27a and 28a of the yoke disposed in the vicinity of the magnet 26 are formed in a band plate shape along the vertical direction, and the rotation direction of the magnet 26 is directed with the width direction in the thickness direction of the window body 4. Is disposed on both sides of the shaft 22 on the front surface side and the back surface side of the window body 4. In addition, an arc-shaped recess 29 having a radius of curvature larger than the arc-shaped rotation trajectory of the magnetic pole is formed on the side facing the shaft 22, and the recess 29 is disposed so as to face the shaft 22. The inner peripheral portion of the recess 29 is disposed outside the rotation trajectory of the magnetic pole caused by the rotation of the magnet 26. In this case, the base end portions 27a and 28a of both yokes face the inner peripheral portion of the recess 29 in the left-right direction of the shaft 22 (thickness direction of the window body 3), but in the vertical direction of the shaft 22 A space 30 between the yokes 27 and 28 is disposed.
In addition, the vertical rod 11 on the summoning side is integrally provided with a reinforcing vertical member 31 that also serves as a handle when opening and closing the window 3, and the lock piece 23 of the crescent lock 21, the magnet 26, and the yokes 27 and 28. Is attached to the vertical rod 11 including this reinforcing vertical member 31. The locking mechanism of the present invention refers to the crescent lock 21 in this embodiment.

  Further, the tip portions 27 b and 28 b of the yoke are provided at the upper end portion of the window body 4. Grooves 36 for arranging the upper rails 13 provided on the upper frame 5 of the frame 2 at the upper ends of the upper rods 9 fixed to both ends of the upper rods 9 of both the windows 3 and 4. Is formed in an open state toward the upper side, and the vertical flange 11 of the window body 4 provided with the lock piece 23 of the crescent lock 21 has the tip portions 27b and 28b of the yoke in the groove portion 36 thereof. The window body 4 is fixed in parallel upward so as to face the thickness direction of the window body 4. Therefore, when both magnetic poles of the magnet 26 of the crescent lock 21 face the base end portions 27a and 28a of the yoke, a magnetic field is generated between the tip end portions 27b and 28b of the yoke as shown by broken lines in FIGS. To do.

On the other hand, a security sensor module 42 including a magnetic detection element 41 is provided at an intermediate position in the length direction of the upper frame 5 of the frame body 2 and above the vertical rod 11 of the closed window bodies 3 and 4. ing. In the example shown in FIGS. 1 to 3 and the like, a security sensor module 42 is provided in the recess 43 that accommodates the upper collar 9 of the window body 4. A magnetic detection element 41 is provided on the lower surface side of the security sensor module 42, and the magnetic detection element 41 is disposed in the vicinity of the top ends 27b and 28b of the yoke of the window body 4 in a closed state. The leakage magnetic flux from between the tip portions 27b and 28b of these yokes is detected.
For example, a GMR element is used as the magnetic detection element 41, and its sensitivity axis is arranged along the opposite direction of the tip portions 27b and 28b of both yokes, that is, along the thickness direction of the window body 4.
The lock detection device 1 of the present invention is constituted by a magnet 26, yokes 27 and 28, and a magnetic detection element 41 in this embodiment.

The security sensor module 42 incorporates an output device for the detection result of the magnetic detection element 41 together with the magnetic detection element 41. The output device is provided with a wireless transmission unit, a battery, and the like. The output from the security sensor module 42 is received by an external receiver, and an alarm or the like is issued. Alternatively, a microphone for detecting audible sound or ultrasonic waves generated when the glass is cut or broken, an acceleration sensor for detecting vibration, a far-infrared sensor, or an amplifier for issuing an alarm to the security sensor module 42 In addition, an interface to a speaker, a light emitting element, a display, a switch, or the like may be mounted. In addition, the security sensor module 42 may report to a mobile phone, an external security company, or the like wirelessly or by wire.
Moreover, the cover 44 which covers the security sensor module 42 is provided in the upper frame 5 of the frame 2 so that attachment or detachment is possible. This cover 44 is also constituted by an extruded shape of an aluminum alloy, for example.

In the open / close detection device 1 configured as described above, when the lever 25 of the crescent lock 21 is operated, the magnet 26 also rotates integrally with the rotation, and the yoke tip 27b at the upper end of the window body 4 accompanies the rotation. , 28b are changed, and the change of the magnetic field is detected by the magnetic detection element 41, whereby the operating state of the crescent lock 21 can be detected.
Hereinafter, the case where the window is closed and the crescent lock 21 is operated and locked will be described in order.

(1) In the state where the lever 25 is arranged vertically downward as shown in FIGS. 1 and 2, the lock piece 23 is in the unlocked state in which the lock piece 23 is separated from the hook portion 24. 4 in the thickness direction), and both magnetic poles face each other on the inner peripheral portion of the concave portion 29 of the yoke base end portions 27a and 28a. Accordingly, if the S pole of the magnet 26 is opposed to the yoke 27 and the N pole is opposed to the yoke 28 as in the illustrated example, the tip 27b of the yoke at the upper end of the window 4 is the S pole and the yoke tip 28b is The magnetic field is generated between the front end portions 27b and 28b as indicated by the broken line, and the magnetic field is detected by the magnetic detection element 41. FIG. 5 is a graph showing the relationship between the external magnetic field and the output voltage with respect to the magnetic detection element 41, and the output voltage of the magnetic detection element 41 changes along a curve corresponding to the change of the external magnetic field. In this unlocked state, since both the magnetic poles of the magnet 26 are opposed to the yokes 27 and 28, an output corresponding to the magnetic field is generated. In FIG. 5, the external magnetic field is (−) as indicated by a broken line, and for example, an output (+) corresponding to the external magnetic field is generated. Based on this output, the magnetic detection element 41 detects that the lock is released.

(2) When the lever 25 is rotated from the state (1) to raise, the magnetic pole of the magnet 26 rotates along the inner peripheral portion of the concave portion 29 of the yoke base end portions 27a and 28a. When the lever 25 is rotated 90 degrees from the unlocked state of (1) until the lever 25 becomes horizontal, the tip of the lock piece 23 is slightly engaged with the hook portion 24 as shown in FIG. Thus, the magnet 26 is arranged along the vertical direction, and both magnetic poles are directed to the space 30 between the yokes 27 and 28. Therefore, the magnetic field is closed at the base end portions 27a and 28a of the yoke, and no leakage magnetic flux is generated between the tip portions 27b and 28b of the yoke. As shown in FIG. 7, the external magnetic field is “0”, and the output of the magnetic detection element is also “0”.

(3) When the lever 25 is further rotated upward from the state of (2) and is rotated 180 ° from the unlocked state of (1) and the lever 25 is disposed vertically upward, the lock is obtained as shown in FIG. The piece 23 is deeply engaged with the hook portion 24 to be locked, and the magnet 26 is arranged along the horizontal direction (thickness direction of the window body 4), and both magnetic poles are recessed portions 29 of the yoke base end portions 27a and 28a. Confront the inner periphery of the. Accordingly, a magnetic field is generated between the tip portions 27 b and 28 b of the yoke at the upper end of the window 4, and the magnetic field is detected by the magnetic detection element 41.
In this series of operations, as described in (1) and (3), the state in which the magnetic pole of the magnet 26 faces the inner peripheral portion of the concave portion 29 of the yoke base end portions 27a and 28a is described in (2). (1) and (3) occur twice, but in the unlocked state of (1) and the locked state of (3), the direction of the magnetic pole is 180 ° opposite, (3 In the locked state, as shown in FIG. 9, the external magnetic field is a (+) magnetic field opposite to that in FIG. 5, and a (-) output is generated in accordance with the magnetic field. And the magnetic detection element 41 detects that it is a locked state by this output.

As described above, in the lock detection device 1, the magnet 26 is rotated integrally with the crescent lock 21, and the magnetic field formed by the magnet 26 is transmitted to the upper end portion of the window body 4 through the yokes 27 and 28. However, the magnetic flux is detected from the frame body 2 above the window body 4 by the magnetism detecting element 41, and only the magnet 26 and the yokes 27 and 28 are disposed on the window body 4. The power supply to the security sensor module 42 having the magnetic detection element 41 is unnecessary, and since these are provided in the frame 2 fixed to the housing, the power supply is easy from the outside.
In addition, since the locked state can be detected by one magnetic detection element 41, the security sensor module 42 can be reduced in size and cost, and the size of the frame 2 can be changed when it is attached to a window. Mounting is possible with no or slight dimensional changes. Further, since only the magnet 26 and the yokes 27 and 28 are incorporated in the window body 4, an increase in the thickness of the window body 4 can be suppressed. Therefore, the construction cost of the frame body 2 and the window bodies 3 and 4 can be suppressed, and it is difficult to find them from the outside in a state where they are attached to the frame body 2 and the window bodies 3 and 4, and the crime prevention property is improved. .

  FIGS. 10-23 has shown the locking detection apparatus of 2nd Embodiment of this invention. In the first embodiment, both of the pair of yokes 27 and 28 are incorporated in one window body 4, but the lock detection device 51 of this embodiment divides the yokes 52 and 53 into two window bodies 3 and 4. Has been established. That is, both the yokes 52 and 53 are formed so that the base end portions 52a and 53a are straight, one yoke 52 is accommodated in the vertical rod 11 of the outdoor window 3, and the other yoke 53 is the chamber. The yokes 52 and 53 are accommodated in the vertical shaft 11 of the inner window body 4, and when the window bodies 3 and 4 are closed, the magnets 26 are attached to the indoor vertical shaft 11. It is arranged to face each other. The yokes 52 and 53 are provided along the vertical direction in the vertical rod 11 of the respective window bodies 3 and 4, and the tip portions 52 b and 53 b are groove portions 36 of the upper rod 9 of the respective window bodies 3 and 4. It is faced inside. In this case, the yoke 53 provided on the indoor-side window body 4 has a tip 53b bent toward the outdoor side and approaches the tip 52b of the yoke at the upper end of the outdoor-side window body 3. The magnetism detecting element 41 is provided above these facing positions. Since the other configuration is the same as that of the first embodiment, the same reference numerals are given and description thereof is omitted.

In this locking detection device 51, as in the first embodiment, leakage magnetic flux can be detected by the magnetic detection element 41 from the frame body 2 above the window bodies 3 and 4, and the power supply to each window body 3 and 4 can be detected. Is not necessary, and power can be easily supplied to the security module 42 from the outside.
By the way, when the crescent lock 21 is in the locked state, the lock piece 23 pulls the hook portion 24, so that both the windows 3 and 4 are closer to each other than in the unlocked state. In addition, due to the engagement between the lock piece 23 and the hook portion 24, the vertical hooks 11 on the door contact side of the window bodies 3 and 4 (vertical hooks on both the left and right sides in FIG. 3) are pressed against the vertical frame 7. . For this reason, in the locked state, the strength of the magnetic field is increased due to the close proximity of the window bodies 3 and 4, and the yokes 52 and 53 are opened and closed in the opening and closing direction of the window bodies 3 and 4. It will be in the state shifted to (horizontal direction). In the illustrated example, when the window bodies 3 and 4 are closed and the crescent lock 21 is in the unlocked state, the tip portions 52b and 53b of both yokes face each other in the thickness direction of the window bodies 2 and 4 to enter the locked state. Sometimes, it is displaced in the horizontal direction from the facing posture in the thickness direction.

In the lock detection device 51 of the second embodiment, since the pair of yokes 52 and 53 are provided separately for the window bodies 3 and 4, the movement of the window bodies 3 and 4 at the time of such locking is performed. In addition, it is possible to detect a so-called “empty” state in which the lock piece 23 is not locked to the hook portion 24 even though the lock piece 23 is rotated to the lock position.
Hereinafter, the unlocked state, the locked state, and the “empty” state will be described with the opening direction of the window bodies 3 and 4 as the X direction and the thickness direction of the window bodies 3 and 4 as the Y direction.

In the unlocked state in which the window bodies 3 and 4 are closed and the lever 25 is arranged vertically downward, the tip portions 52b and 53b of both yokes have the thickness of the window bodies 3 and 4 as shown in FIGS. Since it is in a state facing the direction (Y direction), the output in the X direction is “0” as shown in FIG. The output in the Y direction is a value corresponding to the magnetic field, and in the illustrated example, the output is (+) due to the (−) magnetic field.
Then, as shown in FIG. 13, when the lever 25 of the crescent lock 21 is operated to the horizontal position and the tip of the lock piece 23 is slightly engaged with the hook portion 24, the magnet 26 is attached to the base of both yokes. Since they are arranged in parallel with the end portions 52a and 53a, the magnetic field at the tip portions 52b and 53b of the yoke is “0” in both the X and Y directions as shown in FIG. 14, and the output of the magnetic detection element 41 is also “0”. "

When the lever 25 is further operated in the vertically upward state and the crescent lock 21 is in the locked state, the magnetic pole of the magnet 26 is reversed from the unlocked state in FIG. 10, so that the Y-direction magnetic field as shown in FIG. Is turned to (+), and the windows 3 and 4 are brought close to each other as shown by the arrows in FIG. 15, whereby a relatively large Y-direction magnetic field is generated between the tip portions 52a and 53a of the yoke. A voltage corresponding to the magnitude of the magnetic field is output. In FIG. 17B, the voltage (−) is output by the magnetic field (+). Moreover, since both the window bodies 3 and 4 are pressed in the door contact direction as shown by the arrows in FIG. 16, the tip portions 52b and 53b of the yoke are displaced in the X direction, and a magnetic field in the X direction is generated. In FIG. 17A, the voltage (−) is output by the magnetic field (+). The magnetic detection element 41 is arranged such that, for example, the sensitivity axes of the biaxial GMR elements are directed in the respective directions so as to detect the respective magnetic fields in the Y direction and the X direction. A detection element is used.
In this case, since the change in magnetic flux density in the opening / closing direction of the windows 3 and 4 is small, it is preferable to use a GMR element, a TMR element, or an MI element, but a reed switch or a Hall element may be used. When these semiconductor sensors are used, it is preferable to use a single-chip magnetic detection element in which a plurality of elements having different sensing axis directions are incorporated in one package for miniaturization. Further, it is more preferable that an IC including an amplifier, a signal processing circuit, and the like and a magnetic detection element are integrated into one chip.

Next, the case where the lock piece 23 is rotated to the locked state but is not locked to the hook portion 24, that is, the so-called “empty” state will be described. In this “empty” state, there are a case where the lock piece 23 has come off the front side of the hook portion 24 and a case where the lock piece 23 has come off the side of the hook portion 24.
18 and 19 show a case where the lock piece 23 has come off the front side of the hook portion 24, and in this case, the hook portion 24 is pushed outward by the lock piece 23, so that it is indicated by an arrow. The windows 3 and 4 move in the direction away from each other in the thickness direction. Unlike the locked state, the window bodies 3 and 4 are not pressed against the vertical frame 7. For this reason, as shown in FIG. 20, the magnetic fields of the yoke tip portions 52b and 53b are “0” in the X direction and in the locked state as both yoke tip portions 52b and 53b are separated in the Y direction ( A smaller magnetic field is generated (see FIG. 17B). Therefore, the output of the magnetic detection element 41 is “0” in the X direction, and the absolute value is lower in the Y direction than in the locked state.

  FIGS. 21 and 22 show a case where the lock piece 23 is disengaged to the side of the hook portion 24. In this case, the distance between the window bodies 3 and 4 in the thickness direction does not change. When the piece 23 is released to the side, the two window bodies 3 and 4 move along the rails 13 and 14 by the distance that is removed. The movement of the window bodies 3 and 4 is opposite to the movement in the door contact direction in the locked state. The Y-direction distance is the same as in the unlocked state, and is larger than in the locked state. Therefore, the magnetic fields of the yoke tip portions 52b and 53b are small in the X direction because the magnetic field direction is opposite to that in the locked state, and the Y direction has a larger shift amount than in the locked state. As shown in FIGS. 23 (a) and 23 (b), the output of the magnetic detection element 41 is a value that changes to a (+) voltage in the X direction and decreases in absolute value in the Y direction, as compared with the locked state. It becomes.

As described above, in the locking detection device 51 of this embodiment, the magnet 26 that rotates in accordance with the locking operation, the yokes 52 and 53 that are fixed to the window bodies 3 and 4, and the magnetic detection that is fixed to the frame body 2. The element 41 can detect two types of so-called “empty” states as well as the locked state and unlocked state of normal operation, and can accurately detect the locked state.
In addition, since the base end portions 52a and 53a of the yoke facing the magnet 26 are formed in a straight shape, the strength of the magnetic field transmitted to the yokes 52 and 53 changes as the magnet 26 rotates, and the magnet 26 moves in the horizontal direction. The magnetic field is strongest when it is placed in the position, and the magnetic field gradually weakens even if it is rotated in any direction from the horizontal direction. Since the output characteristics of the magnetic detection element 41 change as the magnetic field changes as shown in FIG. 12 and the like, the strength of the magnetic field can be obtained from the output voltage, and the lock piece 23 can be determined from the strength of the magnetic field. It is also possible to detect the rotation position.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, the present invention can be applied not only to the crescent lock described in the embodiment but also to a thumb turn lock, and also applied to a lock mechanism that can be held in a locked state and an unlocked state by a slide. can do. What is necessary is just to arrange | position so that the magnetic pole of a magnet may oppose a yoke in the partial range of the movement locus | trajectory accompanying these rotation operation | movement of a lock | rock, and a slide operation.
Moreover, as a movable body to be locked, it can be applied not only to sliding windows such as a sliding type but also to a movable body that rotates like a double door type door body. It can also be applied to windows and doors. When applied to a single-open window or door, one of the yokes may be attached to a frame fixed to the housing. In this invention, the window body of this embodiment, this door body, etc. are called movable bodies.

DESCRIPTION OF SYMBOLS 1 ... Locking detection apparatus, 2 ... Frame body, 3, 4 ... Window body (movable body), 11 ... Vertical shaft, 21 ... Crescent lock, 22 ... Shaft, 23 ... Lock piece, 24 ... Hook part, 25 ... Lever, 26 ... Magnet, 27, 28 ... Yoke, 27a, 28a ... Base end, 27b, 28b ... Tip, 29 ... Recess, 30 ... Space, 41 ... Magnetic detection element, 42 ... Security sensor module, 51 ... Locking detection Device, 52, 53 ... Yoke, 52a, 53a ... Base end, 52b, 53b ... Tip

Claims (1)

  By operating a lever provided on a movable body capable of opening and closing an opening, a lock detection device provided in a lock mechanism capable of locking the movable body in a closed state, wherein the movable body is operated by operating the lever. A magnet to be moved and a pair of yokes extending from the vicinity of the magnet to the end of the movable body are provided, and the base end of these yokes is within a range of a part of the movement trajectory of the magnetic pole of the magnet. A locking detection device, characterized in that a magnetic detection element that detects a magnetic field between tip portions of the yoke is provided on a frame that is provided to face both magnetic poles and that forms the opening.

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