JP5011477B2 - Locking confirmation system and magnetic displacement sensor usable therefor - Google Patents

Description

  The present invention relates to a lock confirmation system that enables confirmation of a lock such as a door at a remote location, and a magnetic displacement sensor that can be used therefor.

  As a conventional lock confirmation system, for example, one disclosed in Patent Document 1 is known. In this system, a push button switch is provided at the back of the receiving hole provided in the door frame facing the lock mechanism that advances and retracts the dead bolt by a door knob or key, into which the dead bolt enters and fits. When the dead bolt enters the receiving hole, the push button switch is pressed to output a locking signal, the locking signal is transmitted to the portable electronic device by the wireless transmission circuit, and the locking signal is received by the portable electronic device. Then, the reception time is stored and displayed on the display unit.

Moreover, as a conventional locking confirmation system, the thing of patent document 2 is also known, for example. This system detects the lock state by detecting the tilt of the lock knob with an inclination sensor such as a mercury switch provided on the lock knob of the lock mechanism, and transmits a sound signal indicating the lock state using the answering machine function. Is.
JP 2004-156228 A JP 2000-101733 A

  However, in the former conventional system, a push button switch that is pressed when a dead bolt enters the receiving hole and outputs a locking signal is installed at the back of the receiving hole of the receiving seat, and at the back of the receiving hole. There is a problem that the wiring from the push button switch needs to be pulled out to the wireless transmission circuit, and it takes time and labor to install, and the door must be processed.

  In the latter conventional system, since the tilting sensor is provided on the rotating locking knob, the wiring from the tilting sensor becomes an obstacle and the wiring is moved, so there is a possibility of disconnection. was there.

  Furthermore, both of the above-mentioned two types of conventional systems have a problem that the user cannot know even if unlocked for theft or the like against the user's intention in the absence of the user.

An object of the present invention is to advantageously solve the above-described problems, and the lock confirmation system of the present invention is based on a change in magnetism from a permanent magnet provided on a lock knob of a lock mechanism. A lock sensor for detecting the position, and determining whether the state of the lock mechanism is locked or unlocked based on an output signal of the lock sensor, and when receiving a request signal, a lock state signal based on the determination result A lock state determination means for outputting, and when the request signal is received from a predetermined communication means via the communication line by radio, the request signal is output to the lock state determination means, and the lock state determination means Wireless communication means for receiving the lock state signal from the state determination means and transmitting the lock state signal to the predetermined communication means via the communication line, and the lock sensor is provided on the lock knob. Rotates together with the locking knob Te based on the magnetic change from the permanent magnet, a relay permanent magnet rotates around the parallel support shaft and the rotation axis of the locking knob, a lead that is disposed closer to the relay permanent magnet The reed switch is spatially aligned with respect to the relay permanent magnet so that the alignment direction when the movable contact and fixed contact of the reed switch are in contact with the extending direction of the support shaft of the relay permanent magnet The reed switch is located at a twisted position, and the contact portion between the movable contact and the fixed contact of the reed switch is located adjacent to the support shaft of the relay permanent magnet, and the permanent magnet is coupled with the locking knob. When the relay permanent magnet is rotated between a horizontal direction and a vertical direction, the direction of the north pole and the south pole of the relay permanent magnet is on the same straight line as the direction of the north pole and the south pole of the permanent magnet. location and Orientation of the N pole and S pole of the relay permanent magnet, and the position to be parallel to the direction of N and S poles of the permanent magnet, characterized in that it is maintained is rotated by the magnetic force of the permanent magnet Is.

  In this locking confirmation system of the present invention, the locking sensor detects the position of the locking knob based on the magnetic change from the permanent magnet provided in the locking knob of the lock mechanism, Based on the output signal of the lock sensor, it is determined whether the state of the lock mechanism is locked or unlocked, and when a request signal is received, a lock state signal based on the determination result is output. When wireless communication means connected wirelessly to a communication line such as a mobile phone line receives the request signal from a predetermined user communication means such as a mobile phone via the communication line, the request signal is When the lock state signal is received from the lock state determination unit, the lock state signal is transmitted to the predetermined user communication unit via the communication line.

  Therefore, according to the lock confirmation system of the present invention, since it is only necessary to provide a lock sensor so as to detect the position of the lock knob exposed on the surface of the door or the like, it takes little time and effort to install the system. Also, processing of doors and the like can be made unnecessary. In addition, since the tilt sensor that requires wiring is not provided on the locking knob, the wiring from the sensor does not get in the way, and the possibility of disconnection of the wiring can be avoided. In addition, since the lock sensor is magnetically operated and basically uses a reed switch with low power consumption, the system can be reliably operated continuously over a long period of time.

  In the locking confirmation system according to the present invention, the lock state determination means may output a lock state signal based on the determination result after the change even when the determination result is changed. For example, not only when a request signal is received from the user communication means, but also when the determination result of the state of the lock mechanism changes due to a change in the position of the locking knob after unlocking the user, Since it is transmitted to the communication means, it is possible to know the unlocking even when the user is unlocked for theft or the like against the user's intention in the absence of the user.

Further, according to the locking confirmation system of the present invention, the locking sensor is based on a magnetic change from a permanent magnet provided on the locking knob and rotating together with the locking knob, and the support shaft parallel to the rotation axis of the locking knob. A relay permanent magnet that rotates around, and a reed switch provided close to the relay permanent magnet, the reed switch being connected to the relay permanent magnet between a movable contact and a fixed contact of the reed switch; The alignment direction at the time of contact spatially intersects the extending direction of the support shaft of the relay permanent magnet and is located at a twist position, and the contact portion between the movable contact and the fixed contact of the reed switch is the relay permanent Since the magnet is arranged so as to be adjacent to the support shaft of the magnet, the relay permanent magnet first rotates based on the magnetic change from the permanent magnet provided on the locking knob, and the relay permanent Based on the magnetic change from the stone, the reed switch provided close to the relay permanent magnet operates, so even if the distance between the locking knob and the reed switch is relatively large, the reed switch was provided on the locking knob. The reed switch can be reliably operated based on a change in magnetism from the permanent magnet.

Further, the magnetic displacement sensor of the present invention is a relay permanent that is attached to a detected rotating body, rotates around a predetermined rotation axis, and moves relative to a permanent magnet that takes two positions rotated 90 degrees with respect to each other. A magnet and a reed switch provided in proximity to the relay permanent magnet, wherein the relay permanent magnet is based on a change in magnetism from the permanent magnet due to the relative displacement , and the rotation axis. The reed switch rotates with respect to the relay permanent magnet, and the alignment direction when the movable contact and fixed contact of the reed switch are in contact with the relay permanent magnet is the extension of the support shaft of the relay permanent magnet. together located spatially intersecting twisted position with respect to the extension direction, distribution as the contact portion between the movable contact and the fixed contact of the reed switch is positioned adjacent to the supporting shaft of the relay permanent magnet Is, when the permanent magnet is rotated between the horizontal and vertical directions with the detected rotational body, the relay permanent magnet, the direction of the N pole and S pole of the relay permanent magnet, the N pole of the permanent magnet The permanent magnet is located at a position that is collinear with the direction of the S pole and the direction of the N and S poles of the relay permanent magnet parallel to the direction of the N and S poles of the permanent magnet. It is characterized by being rotated and maintained by the magnetic force .

Such a magnetic displacement sensor according to the present invention includes a relay permanent magnet that moves relative to the permanent magnet provided on the locking knob by the rotation of the locking knob, and a reed switch provided close to the relay permanent magnet. The relay permanent magnet is moved relative to the permanent magnet by the rotation of the locking knob, that is , the rotation of the locking knob changes the direction of the permanent magnet with respect to the relay permanent magnet. If it is made to rotate based on the magnetic change from the permanent magnet by this, the locking sensor of the locking confirmation system of this invention will be comprised.

  Normally, the reed switch does not operate unless the permanent magnet approaches several millimeters. According to the magnetic displacement sensor of the present invention, both the permanent magnet and the relay permanent magnet are magnetized. Therefore, even if the permanent magnet and the reed switch with the relay permanent magnet are separated from each other by, for example, several centimeters, the lead changes due to the relative transition between the permanent magnet and the reed switch with the relay permanent magnet. The switch can be operated reliably.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the first embodiment of the locking confirmation system of the present invention, FIG. 2 is a perspective view showing the installation state of the locking confirmation system of the first embodiment, and FIG. It is explanatory drawing which illustrates the detection method of the position of the locking knob by the locking sensor of the locking confirmation system of the 1st Example, and the code | symbol 1 in the figure shows the case of the locking confirmation system of this 1st Example.

  As shown in FIG. 2, the lock confirmation system of the first embodiment has a door knob DN and a lock knob (thum turn) RN of the door D, and advances or retracts the dead bolt DB by turning the key or the lock knob RN. A normal locking mechanism RM is fixed to a position (upward position in the illustrated example) adjacent to the locking knob RN using, for example, an adhesive sheet (not shown). As shown in FIG. , A magnetic sensor-based locking sensor 2 as an embodiment of the magnetic displacement sensor of the present invention, and a normal controller CPU (central processing unit) 3 connected to the locking sensor 2 as a lock state determination means; A wireless telephone unit (for example, a (trade name) Dopa communication unit which is a wireless packet communication terminal) 4 as wireless communication means connected to the controller CPU 3 They lock sensor 2, which comprises a battery 5 for supplying power to the controller CPU3 and wireless telephone unit 4.

  Here, on the front surface of the case 1, as shown in FIG. 3, a lock position switching SW (switch) 6 and a mode switching SW (switch) 7 connected to a controller CPU (central processing unit) 3 and a status display lamp are provided. 8, and an antenna 9 connected to the Dopa communication unit 4 is provided on the upper surface of the case 1. On the other hand, the lower surface of the case 1 is formed of a material such as plastic that allows easy passage of magnetism. The projecting portion 1a is provided, and in the projecting portion 1a, there is provided a relay permanent magnet 2b that is rotatably supported around a support shaft 2a extending in the horizontal direction in the front-rear direction of the case 1. The rod-like permanent magnet MB is fixed to the front end face F of the locking knob RN using, for example, an adhesive or an adhesive sheet (not shown) so that the relay permanent magnet 2b is rotated magnetically. Further, in the lower part of the case 1, a magnetically operated reed switch 2c is provided close to the relay permanent magnet 2b so as to extend in the horizontal direction in the left-right direction of the case 1, and these relay permanent magnets are provided. 2b and the reed switch 2c constitute the locking sensor 2.

  That is, by rotating the locking knob RN to the horizontal position, as shown in FIG. 4A, when the permanent magnet MB is positioned such that the N pole is on the left and the S pole is on the right, the magnetic field lines of the permanent magnet MB Accordingly, the relay permanent magnet 2b is rotated so that the south pole is located on the left and the north pole is located on the right in accordance with the direction of the permanent magnet MB, or as shown in FIG. When the permanent magnet MB is positioned so that is positioned to the right, the relay permanent magnet 2b is rotated by the magnetic field lines of the permanent magnet MB so that the N pole is positioned on the left and the S pole is positioned on the right according to the direction of the permanent magnet MB. When the N and S poles of the relay permanent magnet 2b are directed in the left-right direction as described above, the movable contact and the fixed contact in the reed switch 2c are opposite to each other due to the magnetic lines of force of the relay permanent magnet 2b. The reed switch 2c is turned on by attracting and attracting magnetic poles. (Conduction) in the state.

  Further, when the locking knob RN is rotated to the vertical position, as shown in FIG. 5A, when the permanent magnet MB is positioned such that the S pole is on the top and the N pole is on the bottom, the lines of magnetic force of the permanent magnet MB are placed. Accordingly, the relay permanent magnet 2b is rotated so that the south pole is located on the upper side and the north pole is located on the lower side according to the direction of the permanent magnet MB, or as shown in FIG. When the permanent magnet MB is positioned such that the relay permanent magnet 2b is positioned so that the north pole is on the top and the south pole is on the bottom according to the direction of the permanent magnet MB. When the N pole and the S pole of the relay permanent magnet 2b are vertically oriented as described above, the movable contact and the fixed contact in the reed switch 2c are identical to each other due to the magnetic lines of force of the relay permanent magnet 2b. The reed switch 2c is repelled by magnetizing the magnetic poles. F becomes (non-conductive) state.

  In the locking position switching SW6, it can be set whether the reed switch 2c is determined to be in the locked state or the unlocked state at the position of the locking knob RN where the reed switch 2c is turned on (conductive). When the locking knob RN is positioned in the horizontal position as shown by a solid line in FIG. 3, the locking knob RN is in the locked state, and when the locking knob RN is positioned in the vertical position as shown by a virtual line in FIG. Since the case 1 is arranged above the RN, the setting is made so as to determine that the reed switch 2c is in the locked state when the reed switch 2c is ON (conductive).

  The mode switch SW7 is activated by communication access to the lock confirmation system from the user's mobile phone, personal computer, or the like, and determines whether it is locked or unlocked. Mode 1 for reporting by mail or e-mail, and mode 2 for reporting by signal sound or e-mail to the mobile phone designated by the user when the position of the locking knob RN changes between the locked state and the unlocked state The operation mode can be set selectively with. In addition, when there are a plurality of mobile phones or the like designated by the user, for example, if the plurality of designated numbers are registered in the monitoring center and the lock confirmation system notifies the monitoring center, the monitoring center collectively You may make it report to several designated numbers.

  For example, the status display lamp 8 is lit green when it is determined to be locked, red when it is determined to be unlocked, and turned off when the power is turned off. .

In the locking confirmation system of the first embodiment, the locking sensor 2 detects the position of the locking knob RN based on the change in magnetism (lines of magnetic force) from the permanent magnet MB provided on the locking knob RN of the lock mechanism RM. Then, the controller CPU3, which operates according to a program given in advance, outputs a signal corresponding to the position, and, for example, the locking knob RN is moved to the horizontal position based on the output signal of the locking sensor 2 and the setting at the locking position switching SW6. Is determined to be in the locked state from the output signal of the locking sensor 2 indicating that the reed switch 2c is in the ON (conducting) state and the setting for determining the locked state in the ON state. and so on, the state of the lock mechanism RM is to determine in the unlocking or in lock, in the case of mode 1 tablet status signal based on the determination result when receiving a request signal Output, in the case of mode 2 addition, even if the determination result is changed and outputs a lock status signal based on the determination result after the change. When the wireless telephone unit 4 wirelessly connected to the mobile phone line receives the request signal from a predetermined user communication means such as a mobile phone or a personal computer via the mobile phone line, the controller CPU 3 When the lock state signal is received from the controller CPU 3, the lock state signal is transmitted to the predetermined user communication means via the mobile phone line.

  Therefore, according to the locking confirmation system of the first embodiment, it is only necessary to provide the locking sensor 2 so as to detect the position of the locking knob RN exposed on the surface of the door D. It takes almost no time, and processing of the door D can be made unnecessary. In addition, since the tilt sensor that requires wiring is not provided in the locking knob RN, the wiring from the sensor does not get in the way, and the possibility of disconnection of the wiring can be avoided. Since the lock sensor 2 is magnetically operated and basically uses the reed switch 2c with low power consumption, the system can be reliably operated continuously over a long period of time.

Moreover, according to the lock confirmation system of the first embodiment, not only when a request signal is received from the user communication means, but also when the lock mechanism is unlocked in the absence of the user and the lock knob RN changes its position. Since the lock state signal is transmitted to the user communication means even when the judgment result changes,
The unlocking can be known not only when the user himself / herself confirms the locking with a mobile phone or the like, but also when the user is unlocked for theft or the like against the user's intention in the absence of the user.

  As shown in FIG. 6, the relay permanent magnet 2 b and the reed switch 2 c may be arranged in the lateral direction of the permanent magnet MB provided on the locking knob RN. At that time, as shown in FIG. When the reed switch 2c is positioned above the relay permanent magnet 2b, the reed switch 2c is turned on (conductive) when the locking knob RN is positioned in the horizontal position, and FIG. As shown in the figure, when the reed switch 2c is arranged in the lateral direction of the relay permanent magnet 2b, the reed switch 2c is turned off (non-conducting) when the locking knob RN is located in the horizontal position.

  FIG. 7 is a block diagram showing the configuration of the second embodiment of the locking confirmation system of the present invention, FIG. 8 is a perspective view showing the installation state of the locking confirmation system of the second embodiment, and FIG. It is explanatory drawing which shows the other example of the detection method of the position of the locking knob by the locking sensor of the locking confirmation system of an Example, The part similar to the previous Example in a figure is shown with the same code | symbol, and the code | symbol 11 is The door unit of the lock confirmation system according to the second embodiment, and 12 denotes a fixed unit.

  That is, the lock confirmation system of the second embodiment includes a door unit 11 and a fixed unit 12 as shown in FIG. 7, and the door unit 11 in this case includes a door D as shown in FIG. In the same manner as in the first embodiment, the relay permanent magnet 2b and the reed switch 2c are fixed to a position (upward position in the illustrated example) adjacent to the locking knob RN using, for example, an adhesive sheet (not illustrated). When the detection request signal is received from the weak wireless communication circuit 13, the output of the reed switch 2c is operated. A normal controller CPU (central processing unit) 3 that outputs a signal to the weak wireless communication circuit 13 as a digital signal, and the controller CPU 3 And which comprises a battery 5 for supplying power to the weak radio communication circuit 13.

  The fixed unit 12 here is provided at a fixed position near the door D, and is connected to the weak wireless communication circuit 13 similar to that of the door unit 11 and the weak wireless communication circuit 13 in the previous embodiment. A normal controller CPU (central processing unit) 3 as a lock state determination means that operates in the same manner as in FIG. 2, and a wireless telephone unit (for example, a wireless packet communication terminal) connected to the controller CPU 3 as wireless communication means ( (Trade name) Dopa communication unit) 4, a battery 5 for supplying power to the weak wireless communication circuit 13, the controller CPU 3 and the wireless telephone unit 4, and a battery 5 connected to a commercial power supply of alternating current (AC) 100 V to trickle the battery 5 A trickle charging circuit 14 for charging (maintenance charging), and a controller CPU 3 It is connected to a locking position switching SW6 and mode switching SW7 of as in the previous embodiment.

  Here, the relay permanent magnet 2b and the reed switch 2c are provided at the lower part of the case of the door unit 11 so as to be adjacent to the locking knob RN, as shown by a broken line in FIG. A rod-like permanent magnet MB is fixed to the front end face F of the RN by an adhesive tape 15 in the illustrated example, so that the locking knob RN is in a vertical position as shown in FIG. 5 depending on the rotational position of the locking knob RN. When the N pole and S pole of the relay permanent magnet 2b are vertically directed by the magnetism of the permanent magnet MB, the reed switch 2c is turned off, and the locking knob RN is in the horizontal position, the magnetism of the permanent magnet MB is reached. Thus, the N pole and the S pole of the relay permanent magnet 2b face in the left-right direction, and the reed switch 2c is turned on, whereby the locking sensor 2 outputs different signals depending on whether it is locked or unlocked. As shown in FIG. 9, the permanent magnet MB is embedded in the center of a U-shaped plastic case 16, and the plastic case 16 is softened and fixed to the locking knob RN with an adhesive tape. The locking knob RN may be clamped elastically or may be fitted to the locking knob RN.

  The same effect as that of the previous embodiment can be obtained by the locking confirmation system of the second embodiment. Further, according to the locking confirmation system of the second embodiment, the system is further wirelessly connected between the weak wireless communication circuits 13. The door unit 11 and the fixed unit 12 that communicate with each other are separated, and the lock sensor 2 of the door unit 11 is magnetically operated to use a reed switch 2c with low power consumption. 14 is provided, the unit provided in the door D can be reduced in size, and the system can be reliably operated continuously for a long period of time.

As mentioned above, although demonstrated based on the example of illustration, this invention is not limited to the above-mentioned example .

That is, in the present invention, the shape and arrangement of the permanent magnets and relay permanent magnets provided on the locking knob may be different from those in the illustrated example.

On the other hand, the magnetic displacement sensor of the present invention can be used in addition to the lock confirmation system of the above example .

  Thus, according to the lock confirmation system of the present invention, since it is only necessary to provide a lock sensor so as to detect the position of the lock knob exposed on the surface of the door, it takes little effort and time to install the system, Door processing is also unnecessary. In addition, since the tilt sensor that requires wiring is not provided on the locking knob, the wiring from the sensor does not get in the way, and the possibility of disconnection of the wiring can be avoided. In addition, since the lock sensor is magnetically operated and basically uses a reed switch with low power consumption, the system can be reliably operated continuously over a long period of time.

  Further, according to the magnetic displacement sensor of the present invention that can be used in the locking confirmation system, the reed switch can be reliably operated even if the permanent magnet and the reed switch with the relay permanent magnet are somewhat separated.

It is a block diagram which shows the structure of 1st Example of the locking confirmation system of this invention. It is a perspective view which shows the installation state of the locking confirmation system of the said 1st Example. It is explanatory drawing which illustrates the detection method of the position of the locking knob by the locking sensor of the locking confirmation system of the said 1st Example. (A), (b) is explanatory drawing which respectively shows the state in which a reed switch of the locking sensor as one Example of the magnetic displacement sensor of this invention of the said locking confirmation system of the said 1st Example will be in an ON state. It is. (A), (b) is explanatory drawing which respectively shows the state from which the reed switch of the locking sensor of the said Example will be in an OFF state of the locking confirmation system of the said 1st Example. (A), (b) shows the state of the reed switch when the lock sensor of the lock confirmation system of the first embodiment is arranged in the lateral direction of the lock knob and the direction of the reed switch relative to the relay permanent magnet is mutually changed. It is explanatory drawing which shows each. It is a block diagram which shows the structure of 2nd Example of the locking confirmation system of this invention. It is a perspective view which shows the installation state of the locking confirmation system of the said 2nd Example. It is explanatory drawing which shows the other example of the detection method of the position of the locking knob by the locking sensor of the locking confirmation system of the said 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Locking sensor 2a Support shaft 2b Relay permanent magnet 2c Reed switch 3 Controller CPU
4 Wireless telephone unit 5 Battery 6 Locking position switching SW
7 Mode switch SW
DESCRIPTION OF SYMBOLS 8 Status display lamp 9 Antenna 10 Reflector 11 Door unit 12 Fixed unit 13 Weak wireless communication circuit 14 Trickle charging circuit 15 Adhesive tape 16 Plastic case D Door DB Deadbolt DN Doorknob MB Permanent magnet RM Locking mechanism RN Locking knob

Claims (3)

A locking sensor for detecting the position of the locking knob based on a change in magnetism from a permanent magnet provided on the locking knob of the lock mechanism;
Determining whether the state of the lock mechanism is locked or unlocked based on the output signal of the locking sensor, and when receiving a request signal, a lock state determining means for outputting a lock state signal based on the determination result;
When wirelessly connected to a communication line and receiving the request signal from a predetermined communication unit via the communication line, the request signal is output to the lock state determination unit, and the lock state signal is output from the lock state determination unit. A wireless communication means for transmitting the lock state signal to the predetermined communication means via the communication line when receiving,
The locking sensor includes a relay permanent magnet that rotates around a support axis parallel to a rotation axis of the locking knob based on a change in magnetism from a permanent magnet that is provided on the locking knob and rotates together with the locking knob, and a relay thereof. A reed switch provided close to the permanent magnet,
The reed switch is twisted with respect to the relay permanent magnet so that the alignment direction at the time of contact between the movable contact and the fixed contact of the reed switch spatially intersects the extending direction of the support shaft of the relay permanent magnet. as well as the position, the contact portion between the movable contact and the fixed contact of the reed switch is arranged to be positioned adjacent to the supporting shaft of the relay permanent magnet,
When the permanent magnet rotates together with the locking knob between the horizontal direction and the vertical direction, the relay permanent magnet has the N-pole and S-pole directions of the permanent magnet so that the N-pole and S-pole of the permanent magnet are oriented. It is rotated by the magnetic force of the permanent magnet to a position that is collinear with the direction and a position in which the N and S poles of the relay permanent magnet are parallel to the N and S poles of the permanent magnet. Locking confirmation system, characterized by being moved and maintained .   The lock confirmation system according to claim 1, wherein the lock state determination means outputs a lock state signal based on the determination result after the change even when the determination result changes. A relay permanent magnet that is attached to the detected rotating body, rotates around a predetermined rotation axis, and moves relative to a permanent magnet that takes two positions rotated by 90 degrees ;
A reed switch provided close to the relay permanent magnet,
The relay permanent magnet rotates around a support axis parallel to the rotation axis based on a change in magnetism from the permanent magnet due to the relative displacement,
The reed switch is twisted with respect to the relay permanent magnet so that the alignment direction at the time of contact between the movable contact and the fixed contact of the reed switch spatially intersects the extending direction of the support shaft of the relay permanent magnet. as well as the position, is arranged such that the contact portion between the movable contact and the fixed contact of the reed switch is positioned adjacent to the supporting shaft of the relay permanent magnet,
When the permanent magnet rotates together with the detected rotating body between the horizontal direction and the vertical direction, the relay permanent magnet has the N-pole and S-pole orientations of the relay permanent magnet so that the N-pole and S-pole of the permanent magnet are oriented. The magnetic force of the permanent magnet is at a position that is collinear with the direction of the pole, and at a position where the direction of the N pole and S pole of the relay permanent magnet is parallel to the direction of the N pole and S pole of the permanent magnet. The magnetic displacement sensor is characterized in that it is rotated and maintained by the magnetic displacement sensor.

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