JPH06167149A - Magnetic memory element - Google Patents

Abstract

PURPOSE:To make it possible to store and read magnetic data more definitely by installing a magnetic storage member comprising a semi-hard magnetic material to a sensing point on the side of an electromagnetic conversion element for a through hole or the like. CONSTITUTION:When a magnetic storage member 1 approaches an N pole of a drive magnet 3, an S pole is induced on a magnet 3 side of the member while an N pole is induced on the other side. Since the member is made of a semi-hard magnetic material, the magnetic poles N and S remain therein even if the magnet 3 is removed. Then, in the case when it is desired to discriminate the record of magnetic induction of the magnet 3, if a switch 4 is closed, a hole IC 2 outputs to the N pole so that the electric current may flow to an open collector 2c, thereby forcing an LED 7 to emit light. When the S pole of the magnet 3 approaches, the IC 2 fails to output. Even if the switch 4 is closed, therefore, the LED 7 will not emit light. It is, therefore, possible to discriminate the record of magnetic polarity approach of the magnet easily and definitely and use for the confirmation of unlocking records as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an element for storing magnetism and being easily read out. Further, by using the element, a solution for automatically storing in a key a history of locking or unlocking with a key. The present invention relates to a lock confirmation device.

[0002]

2. Description of the Related Art As a first conventional example, a magnet card used for ID check or the like will be described. A so-called magnet card, in which small permanent magnets are embedded in a sandwich shape at a predetermined interval in a card made of synthetic resin, the arrangement of the permanent magnets is used as information. That is, a card reader that reads information from the magnet card reads the array of permanent magnets of the card with a Hall IC provided in the ceiling portion of the insertion slot of the card reader, encodes it, and processes it with an MPU or the like. It is used for ID check.

Therefore, in order to store the magnetic information of the inserted magnet card, a method is adopted in which the magnetism of the permanent magnet of the magnet card is converted into electronic information by a magnetoelectric conversion element and latched. Therefore, a memory backup power supply is essential for this control system. That is, it is impossible to turn on the power only when necessary to read information and turn off all the power when unnecessary. FIG. 6 is an exploded perspective view of a locking / unlocking confirmation device a of a second conventional example.

A first reed switch e in which a first bias magnet d ₁ is attached to _one side end c ₁ of a knob c of the key b.
₁ is provided, and the second bias magnet d is provided at the other side end c ₂ .
₂ second reed switch e ₂ is provided which is clamped by the first
The B pole of the bias magnet d ₁ is oriented in the key insertion direction, and the S pole of the second bias magnet d ₂ is oriented in the key removal direction. At the front end of the cylinder body f, a pair of first drive magnets n ₁ and n ₃ with the N pole facing the surface are located at the positions of 1:30 and 7:30 of the holder g at the positions of 5:30 and 10:30. A pair of second drive magnets with the S pole facing the surface
₄ , s ₂ are furnished.

When the first reed switch e ₁ passes near the first drive magnet n ₁ or n ₃ immediately before key removal during operation of the key counterclockwise (hereinafter referred to as CCW) in the locking stroke, The contact of the 1-reed switch e ₁ is closed, the contact is kept closed even after the key b is removed from the cylinder body f, and the contact is opened when passing near the second drive magnets s ₄ and s _2. The magnetic flux density of the first bias magnet d ₁ is urged to such an extent that the contacts continue to open even after b is removed from the cylinder body f.

When the second reed switch e ₂ passes in the vicinity of the second drive magnet s ₄ or s ₂ immediately before the key is removed during the clockwise (hereinafter CW) operation of the key in the unlocking process, The contact of the two reed switch e ₂ is closed, and the contact is kept closed even after the key b is removed from the cylinder body f, and when passing near the first drive magnet n ₁ or n ₃ , the second reed switch e ₂ The contact is opened and the key b
The magnetic flux density of the second bias magnet d ₂ is urged to such an extent that the contact continues to be opened even after it is removed from the cylinder body f (Japanese Patent Laid-Open No. 63-75264).

FIG. 7 is a view of the holder g as viewed from the front, showing the arrangement of drive magnets. (A) shows the arrangement of a drive magnet of a type (hereinafter referred to as 18 type) in which the key is inserted into the cylinder and then rotated (180 ° CCW or CW) to lock (unlock) and pull out the key. (B) shows the arrangement of a drive magnet of a type (hereinafter referred to as 36 type) in which the key is inserted into the cylinder and then rotated by 360 ° CCW or CW to lock (unlock) and pull out the key. First drive magnet n ₁ and second drive magnet s
₂ is arranged on the X axis.

(C) is about 45 ° after inserting the key into the cylinder
Approximately 4 after locking (unlocking) by rotating CCW or CW
It shows the arrangement of the drive magnet of the type that pulls out the key at the original position after returning to 5 ° CW or CCW (hereinafter referred to as the 45 type), but the arrangement of the drive magnet itself is the same as that of the 18th type. The description is omitted. Since it is configured as described above, the operation of the conventional locking / unlocking confirmation device will be described with reference to FIG. FIG. 8 is a sectional view showing a situation in which a holder g having a drive magnet incorporated therein is cut and developed at a position of 6 o'clock, and a reed switch is further moved on the holder g.

In the locking process, the first reed switch e
_{Both 1} and the second reed switch e ₂ are finally L in the figure.
While passing in the direction, they pass over the first drive magnets n ₁ and n ₃ , respectively. At this time, the first reed switch e ₁ is also closed after sampling the first contact of the reed switch e ₁ applied Ai is the same direction of the magnetic field lines and magnetic field lines of the bias magnets d ₁ of the first drive magnet n ₁ is closed key to continue.

The second reed switch e ₂ has a magnetic field line in the opposite direction of the first drive magnet n ₃ and a bias magnet d.
The magnetic lines of force ₂ cancel each other out, and the contact of the second reed switch e ₂ is opened and continues to be opened even after the key is removed. That is, the fact that the cylinder body f (lock) is locked by this key b is stored by closing the contact of the first reed switch e ₁ .

In the unlocking process, the first reed switch e
_{Both 1} and the second reed switch e ₂ are finally U in the figure.
While moving in the L direction, they pass over the second drive magnets s ₂ and s ₄ , respectively. At this time, in the second reed switch e ₂ , the magnetic line of force of the second drive magnet s _{4 in} the same direction and the magnetic line of force of the bias magnet d ₂ are added together.
The contact of the reed switch e ₂ is closed and continues to be closed after the key is removed. The first reed switch e ₁ is connected to the magnetic field line in the opposite direction of the second drive magnet s ₂ and the bias magnet d.
The magnetic field lines of ₁ are canceled and the contact point of the first reed switch e ₁ is opened and continues to be opened even after the key is removed. That is, the fact that the cylinder body f (lock) is unlocked by this key b is stored by closing the contact of the second reed switch e ₂ .

The structure and operation of the conventional example have been described above.
It has the following drawbacks. In the first conventional example, one IC memory is required to store the direction of magnetism, and it is necessary to constantly supply a current for refreshing the IC memory. There is quite a lot of simple 1-bit information that we want to know in the world. For example, there is no spare time to open or close the door, raise or lower the door, lock or unlock with a key, and so on. It is not necessary to build a fancy electronic system to store such simple but extremely important information.

In the second conventional locking / unlocking confirmation apparatus, the history of the locking / unlocking operation is regarded as the history of the rotation direction, and is stored by utilizing the hysteresis of the reed switch equipped with the bias magnet. Therefore, the holding force with which the contact of the reed switch keeps closing or the holding force that keeps opening is made up of a delicate balance force due to the hysteresis of the reed switch by the drive magnet and the bias magnet, and its range and holding force are naturally limited. .

Therefore, if the key of the conventional example is inadvertently dropped on the concrete floor while being carried, the contact that was originally closed may be opened due to the impact force applied to the contact of the reed switch. It has a serious drawback that the contact that was originally opened may be closed and an erroneous display may be given when checking the lock / unlock. Therefore, since the purpose of this product is to confirm the security, it is a serious impediment to the practical use that any one wrong display is made.

[0015]

SUMMARY OF THE INVENTION In view of the above points, the present invention provides an element capable of easily and surely storing and reading out magnetism, and using the magnetic storage element as a key for carrying. It is an object of the present invention to provide a highly reliable locking / unlocking confirmation device that does not cause an erroneous display even if it receives vibration or shock.

[0016]

In order to achieve the above object, in the first invention, in a magnetoelectric conversion element such as a Hall element or a magnetoresistive effect element, the magnetoelectric conversion element is made of a semi-hard magnetic material. A structure with a magnetic storage member is used.

In the second invention, a lock cylinder,
A key for operating the cylinder, and a knob of the key,
A magnetic-electric conversion element provided with a magnetic memory member made of a semi-hard magnetic material is provided, and a battery, an LED and a switch are provided, while the cylinder is provided with the magnetic memory in the latter half of the locking process by key operation or the latter half of the unlocking process. A drive magnet made of a permanent magnet is provided near the trajectory of the tip of the member, either near the front surface of the cylinder or near the front surface of the cylinder. It is magnetized in a specific direction in response to the drive magnet, and is magnetized in the opposite direction to the specific direction in response to a drive magnet in the vicinity where the magnetic storage member finally passes in the latter half of the unlocking process. A locking / unlocking confirmation device in which the magnetic poles of the drive magnet are set,

When the magnetoelectric conversion element, the battery, the LED and the switch arranged on the knob of the key are connected and the switch is closed, the magnetoelectric conversion element has a specific direction of the residual magnetism of the magnetic memory member or At least one of the directions of the residual magnetism opposite to the specific direction is detected, and the detection current causes the LED to emit light to display at least one of the directions of the residual magnetism of the magnetic storage member. .

Further, in a series of magnetic circuits from the drive magnet arranged in the vicinity of the cylinder to the magnetic storage member of the magnetic storage element provided on the knob of the key, and further through the magnetoelectric conversion element to the drive magnet, A bias magnet made of a permanent magnet is arranged at any position of the magnetic circuit on the side of the knob, and a residual magnetism in a specific direction remaining in the magnetic memory member is attached by the bias magnet. A vibrant configuration was adopted.

Further, in a series of magnetic circuits from the drive magnet arranged in the vicinity of the cylinder to the magnetic memory member of the magnetic memory element provided on the knob of the key, and further through the magnetoelectric conversion element to the drive magnet, A rotary bias magnet made of a permanent magnet is rotatably disposed on the side of the magnetic circuit on the side of the knob facing the drive magnet as described above.
A structure is adopted in which the residual magnetism remaining in the magnetic memory member is biased by the rotary bias magnet.

In the third invention, a lock cylinder,
A key for operating the cylinder is provided, and a drive magnet made of a permanent magnet is provided on either the front surface of the cylinder or in the vicinity of the front surface of the cylinder, and a side end of the knob of the key is provided.
A rotary magnet composed of a permanent magnet having a pair of magnetic poles is rotatably provided so as to face the drive magnet, and is attracted by a magnetic material of either a semi-hard magnetic material or a soft magnetic material in the vicinity of the rotary magnet. A member is provided on the side opposite to the drive magnet side, and the rotary magnet is colored so that it can be identified that a specific magnetic pole of the rotary magnet is attracted to the attracting member, and a protective member for covering the key knob is provided for the rotary magnet. A viewing window is formed, while the drive magnet sets a specific magnetic pole in the vicinity of the locus through which the side end of the rotary magnet passes in the latter half of the lock stroke by key operation, and the rotary magnet in the latter half of the unlock stroke. And the specific magnetic pole near the locus through which the side edge of the A locking and unlocking confirmation device that sets the magnetic poles of the pair,

At the time when the rotary magnet finally passes the vicinity of any of the drive magnets in the latter half of the lock stroke of the key operation or the latter half of the unlock stroke, the rotary magnet of the magnetic pole different from that of the drive magnet is detected. The magnetic pole faces the drive magnet, the magnetic pole of the rotary magnet having the same pole as the magnetic pole of the rotary magnet faces the attraction member, and after the key is removed from the cylinder, the magnetic pole of the rotary magnet having the same pole as the drive magnet is A structure is adopted in which the position of the rotary magnet is held by adsorbing the adsorbing member and the rotary magnet can be identified.

[0023]

In the first aspect of the invention, since the magnetic memory element is constructed by placing the magnetic memory member made of a semi-hard magnetic material in parallel with the magnetoelectric conversion element, the direction of the magnetic field applied to the magnetic memory element remains in the magnetic memory member. It may be stored as magnetism, and a current may be passed through the magnetoelectric conversion element only when necessary to drive an LED or the like to read the direction of the residual magnetism as information.

In the second invention, the magnetic memory member made of a semi-hard magnetic material of the magnetic memory element of the first invention, which is arranged on the knob of the key, is provided at the end of the locking process or the unlocking process of the key operation. Magnetically sensitive to the passing drive magnet,
Since the rotation direction of the operation (which becomes a unique rotation direction by locking or unlocking operation) is stored as the residual magnetism, the polarity of the residual magnetism of the magnetic storage member is read by the magnetoelectric conversion element when necessary and displayed by the LED. For example, it is possible to confirm whether the last key operation by the key was a locking operation or an unlocking operation.

Further, since the bias magnet is provided in the magnetic circuit on the key knob in the second invention, the sensitivity of the magnetic memory element to the magnetism in a specific direction in the magnetic memory member of the magnetic memory element is apparently increased. It is possible to use an inexpensive grade magnetoelectric conversion element. Also,
Since the rotary bias magnet is provided in the magnetic circuit on the key knob in the second invention, the magnetic memory element with respect to magnetism in a specific direction in the magnetic memory member of the magnetic memory element or in both directions opposite to the specific direction. The sensitivity is apparently increased, and even if an inexpensive grade magnetoelectric conversion element is used, the magnetoelectric conversion element operates reliably.

In the third invention, the rotary magnet corresponding to the rotary bias magnet in the improved embodiment of the second invention is colored so that the attracting direction can be identified, and the direction of the magnetic field sensed immediately before by the rotary magnet. Since it is possible to confirm (indicates whether it is locked or unlocked), it is possible to provide the simplest and cheapest locking / unlocking confirmation device by eliminating the need for a magnetoelectric conversion element, a battery and an LED.

[0027]

1 is a partial perspective view of a circuit using a magnetic memory element A according to the first invention. That is, the magnetic memory member 1 made of a semi-hard magnetic material has a hole I as a magnetoelectric conversion element.
It is attached to the sensing point on one side of C2. Since the first invention is configured as described above, when the drive magnet 3 approaches one end of the magnetic storage member 1 during use, the magnetic storage member 1 is magnetically responsive to the N magnetic poles of the drive magnet 3. Then, the s magnetic pole is induced at the end of the magnetic memory member 1 on the drive magnet 3 side and the n magnetic pole is induced at the other end. Since the magnetic storage member 1 is made of a semi-hard magnetic material, even if the drive magnet 3 is removed, the pair of magnetic poles n and s of the magnetic storage member 1 will be remnant magnetism and the drive magnet 1 will be described next. Remains until a magnetic field in the opposite direction is applied.

Therefore, when it is desired to identify the magnetic pole of the drive magnet 3 adjacent to the magnetic storage element A immediately before, that is, the history of the magnetic sensitivity, the lead 2a of the Vcc of the Hall IC 2 is connected to the positive electrode of the battery 5 via the switch 4. And the minus of the battery 4 is connected to the ground lead 2b. Further, the LED 7 is connected to the open collector lead 2 of the hall IC 2 from the plus via the switch 4 via the resistor 6.
Connect with c. When the switch 4 is closed, the Hall IC 2 outputs to the n magnetic pole on the left surface,
A current flows through the open collector lead 2c, the LED 7 emits light, and it can be identified that the N magnetic pole of the drive magnet 3 has just approached.

Further, if the S magnetic pole of the drive magnet 3 approaches, the Hall IC 2 does not output, so the LED 7 does not emit light even when the switch 4 is closed. Therefore, it is identified that the S magnetic pole of the drive magnet 3 has just approached. I can. That is, the magnetic memory element A according to the first aspect of the invention stores the magnetism immediately before, and no power supply is required during the storage of this memory.

In this embodiment, the magnetic memory member 1 is provided on one side of the Hall IC 2, but it may be provided on the other side, or on both sides. Also, Hall IC2
If the alternating magnetic field independent type is used, the red LED or the green LED can be turned on according to the direction of the residual magnetism of the magnetic memory member 1. Further, the magnetoelectric conversion element may be a Hall element, a magnetoresistive element, or the like, in which case necessary amplification may be performed.

Next, the second invention will be described with reference to FIG. FIG. 2 is an exploded perspective view of a cylinder assembly B of an embodiment according to the second invention. Key 11 made of non-magnetic material
First, in the concave portion 12c at one side end 12a of the knob 12 of the
The magnetic memory element 13 including the Hall IC 13b as the magnetoelectric conversion element and the magnetic memory member 13a according to the invention is provided with the magnetic memory member 13a facing the key tip direction. A battery 15 is mounted in a recess 12d at approximately the center of the knob 12, and the LED 1 is installed in the recess 12e at the other side end 12b of the knob 12.
6 is attached, and a single pole momentary is turned on in the hole 12f.
The display switch 17 is attached.

Each lead of the Hall IC 13b of the magnetic memory element 13, the battery 15, the LED 16 and the display switch 17
Are connected in the same manner as in the first embodiment of the invention, and the entire knob 12 is fitted in a sandwich shape by a protective member made of synthetic resin (not shown). The protective member is provided with an LED hole and a hole for operating the head of the display switch 17 from the outside. The cylinder body 20 is provided at one end with a screw 18 for attachment to a lock case (not shown) and a fixing recess 19 for fixing the cylinder body 20 to the lock case, and a key hole 21a is provided at the center of the other end. The key guide 21 provided is rotatably mounted.

Hollow disk-shaped retainer 2 made of non-magnetic material
2, a pair of first drive magnets N ₁ and N ₃
When viewed from the front, N ₁ is located at 1:30, N ₃ is located at 7:30, and a pair of second drive magnets S ₄ , S ₂
However, when viewed from the front of the S ₄ , the S ₂ is mounted at the 4:30 position and the S ₂ is mounted at the 10:30 position. The arrangement pattern of the drive magnets is the same as the diagram showing the arrangement pattern of the drive magnets of the conventional example of FIG. Key guide 21
Is rotatably mounted on the inner circumference of the retainer 22.

At the other end of the cylinder body 20, a cap-shaped cylinder cap 23 made of a non-magnetic material and provided with a key guide hole 23a in the center of the bottom is inserted with the retainer 22 and the key guide 21 incorporated therein. The skirt portion 23b is caulked and locked in the recess 20a of the cylinder body 20. An embodiment according to the second invention is an 18-inch cylinder assembly, which has a side end 12a of a knob 12 of a key 11.
At the 6 o'clock position, insert the key 11 into the cylinder body 20, rotate the CCW 180 ° to complete the locking at the 12 o'clock position, and set the side end 12a of the knob 12 of the key 11 to the 12 o'clock position. Insert the key 11 into the cylinder body 20 and insert it into the CW 180
It is rotated to complete unlocking at the 6 o'clock position.

Therefore, basically, the function of the drive magnet is satisfied only by the first drive magnet N ₁ at the 1:30 position and the second drive magnet S ₄ at the 4:30 position, but an 18-inch cylinder When the assembly is operated with another key, or when the lock is unlocked from the inside of the house with a thumb turn, not only the side end 12a of the knob 12 of the key 11 is locked to the CCW starting from the 6 o'clock position. , 12
This also happens when the CCW is locked with the time position as the starting point.

The same applies to unlocking, that is, the phase shifts when another key intervenes. Therefore, it is necessary to dispose the second drive magnet S ₂ at 10:30 and the first drive magnet N ₃ at 7:30. In this embodiment, one drive magnet is evenly distributed in each quadrant, but as long as the order of arrangement is maintained, the drive magnets will not interfere with each other, for example, N _{1 in} one quadrant. It is also possible to bring S ₄ closer to and to arrange both in one quadrant.

The embodiment of the second invention is constructed as described above, and its operation will be described. Locking process of the key 11 (in the present embodiment, since it is 18-inch, the side end 1 of the knob 12 is
CC at 2a from 6 o'clock to 12 o'clock)
When the key 11 passes near the drive magnet N ₁ immediately before the key 11 is removed during the operation of W, the end of the magnetic memory member 13a of the magnetic memory element 13 in the key tip direction magnetically senses to become the S magnetic pole, and the key 11 Even after being extracted from the cylinder body 20, the S magnetic pole is continuously held as residual magnetism.

During operation of the CW in the unlocking process of the key 11 (in this embodiment, the side end 12a of the knob 12 is from the 12 o'clock position to the 6 o'clock position because it is 18-inch), the drive magnet is removed immediately before the key 11 is removed. When passing near S ₄ , the end of the magnetic memory member 13a of the magnetic memory element 13 in the key tip direction becomes magnetically sensitive to become an N magnetic pole, and the key 11 is moved to the cylinder body 2
Even after extraction from 0, the N magnetic pole is kept held as residual magnetism. Therefore, if you are worried about whether or not you have locked with the key, press the switch 17
If the side end of the magnetic memory member 13a which is in contact with the Hall IC 13b is an N magnetic pole, the collector current flows through the Hall IC 13b and the LED 16 is turned on.

If the key 11 has been unlocked, the side end of the magnetic memory member 13a in contact with the Hall IC 13b serves as an S magnetic pole, the collector current does not flow through the Hall IC 13b, and the LED 16 does not light up. You can confirm that. The embodiment according to the second invention uses an 18-inch cylinder. However, as shown in FIG. 7A, when the cylinder is a 36-inch cylinder, the N-pole and S-pole of the drive magnet are X-shaped. Since it can be disposed on the axis, both ends of the magnetic memory member 13a are connected to the N of the drive magnet.
If the Hall IC 13b is provided on the knob 12 so as to face the magnetic pole and the S magnetic pole, and the Hall IC 13b is inserted between them, the resistance of the magnetic circuit becomes smaller and the magnetic force of the drive magnet may be smaller.

A first improved example of the second invention will be described with reference to FIG. FIG. 3 is a sectional view showing a state in which the key 11 is inserted in a sectional view of the front portion of the cylinder taken along the line of the first drive magnet N ₁ and the second drive magnet S ₄ . In the locking / unlocking confirmation device according to the second aspect, the residual magnetism remaining in the magnetic memory member of the magnetic memory element is several hundred Gauss at most due to the magnetic sensitivity of the drive magnet. Therefore, in consideration of the safety margin, it is desirable that the magneto-electric conversion element such as the Hall IC to be used has a guaranteed minimum sensitivity of about 100 gauss. However, the unit price of the Hall IC of the same type becomes higher as the minimum sensitivity becomes lower. Therefore, this is an improved example in which a Hall IC having normal sensitivity is used with high sensitivity.

That is, from the first drive magnet N ₁ arranged in the vicinity of the cylinder to the magnetic storage member 13a of the magnetic storage element 13 provided on the knob 12 of the key 11, and further through the Hall IC 13b which is a magnetoelectric conversion element. In a series of magnetic circuits returning to the original first drive magnet N ₁ ,
As shown in FIG. 3, the magnetic memory member 13 of the Hall IC 13b
A bias magnet 24 made of a permanent magnet magnetized in the same direction as the first drive magnet N ₁ is arranged on the side opposite to the side where a is attached.

The magnetic force of the bias magnet 24 is
It is set within a range not exceeding the minimum sensitivity of the Hall IC 13b. The other structure is the same as that of the second embodiment of the present invention, and the description thereof is omitted. Since it is configured as described above, the magnetic memory member 13a is set to the first position in the latter half of the locking process.
When approaching the drive magnet N ₁ , the magnetic storage member 1
The S magnetic pole is magnetically guided in the key tip direction of 3a, and the N magnetic pole is guided to the Hall IC 13b side.

Even after the key 11 is removed, the magnetic force obtained by adding the magnetic force of the bias magnet 24 to the residual magnetic force of the magnetic memory member 13a based on the above-mentioned magnetic induction still acts on the Hall IC 13b. Therefore, the magnetic force of the bias magnet 24 is applied, and the apparent sensitivity of the Hall IC 13b is increased. In the unlocking process, the magnetic force of the bias magnet 24 is canceled by the remnant magnetism in the opposite direction of the magnetic memory member 13a, and the magnetism acting on the Hall IC 13b becomes much smaller than the intrinsic minimum sensitivity of the Hall IC 13b. No collector current flows.

In the present embodiment, the bias magnet 24 is provided on the side opposite to the key tip side of the Hall IC 13b, but it may be provided between the magnetic memory member 13a and the Hall IC 13b or the magnetic memory member 13a. You may attach to the tip facing a drive magnet. A second improved example of the second invention will be described with reference to FIG. FIG. 4 is a perspective view of a cylinder and a key according to a second improved example of the second invention.

In the first modified example of the second invention, the magnetic force of the bias magnet biases the residual magnetism of the magnetic memory member due to the magnetic sensitivity of the specific drive magnet.
The sensitivity of the magnetoelectric conversion element apparently increases with respect to the specific drive magnet, but the sensitivity does not increase with respect to the drive magnet having a different polarity from the specific drive magnet.
Therefore, the condition of the inherent hysteresis before the bias magnet is not attached may change and the collector current of the magnetoelectric conversion element may not be turned off even when the drive magnet of the different polarity approaches the magnetic memory member. Since it is necessary to precisely adjust the strength and position of the magnetic force of the bias magnet, a troublesome work is required.

Therefore, it is an object of the present invention to provide an improvement that does not require precise adjustment. In FIG. 4, in the middle of the side end 12a of the knob 12 of the key 11, the magnetic memory element 13 is disposed with the Hall IC 13b with the magnetic memory member 13a facing the key tip direction. On the cylinder body 20 side of the side end 12a of the knob 12, the recess 12
g-shaped, tea-cup-shaped capsule 25 made of synthetic resin
Are provided with their side ends in contact with the magnetic memory member 13a. Further, in the capsule 25, a rotary bias magnet 26 composed of a cylindrical permanent magnet magnetized in the diameter direction is rotatably enclosed.

The second improved example of the second invention is configured as described above, and therefore, when the rotary bias magnet 26 approaches the first drive magnet N ₁ in the latter half of the locking process, the S of the rotary bias magnet 26 is changed. The magnetic pole is opposed to the first drive magnet N ₁ , the N magnetic pole of the rotary bias magnet 26 is opposed to the magnetic memory member 13a, and S is provided in the key tip direction of the magnetic memory member 13a.
The magnetic pole magnetically guides, and the N magnetic pole magnetically guides to the Hall IC 13b side.

Even after the key 11 is removed, the magnetic force of the rotary bias magnet 26 added to the residual magnetic force of the magnetic memory member 13a based on the magnetic induction acts on the Hall IC 13b. Therefore, the magnetic force of the rotary bias magnet 26 is applied, and the apparent sensitivity of the Hall IC 13b is increased. When the rotary bias magnet 26 approaches the second drive magnet S ₄ in the latter half of the unlocking process, the N magnetic pole of the rotary bias magnet 26 faces the second drive magnet S ₄ , and the S magnetic pole of the rotary bias magnet 26 is a magnetic storage member. 13a and magnetic recording member 1
The N magnetic pole is magnetically guided in the key tip direction of 3a, and the Hall IC 13
The S magnetic pole magnetically induces on the b side.

Even after the key 11 is removed, the magnetic force obtained by adding the magnetic force of the rotary bias magnet 26 to the residual magnetic force of the magnetic memory member 13a based on the magnetic induction acts on the Hall IC 13b. Therefore, the magnetic force of the rotary bias magnet 26 is applied, and as a result, the hysteresis width of the Hall IC 13b becomes wider and the Hall IC is reliably turned off.

If an alternating magnetic field independent Hall IC with normal sensitivity is used as the magnetoelectric conversion element, for example, a red LED is turned on in a history state in which the magnetic storage member is sensitive to a specific drive magnet, and a specific drive magnet is lit. It is possible to turn on the green LED in the history state in which the drive magnet and the drive magnet of the different polarity are sensitive. Further, in the present embodiment, the capsule 25 has a tea-cylinder structure, but the cross section may be square or triangular. Further, the rotary bias magnet 26 may be a spherical body or a prismatic body, and a rotary shaft may be provided to pivotally support the knob 12.

Further, the capsule 25 can be omitted by forming a recess for accommodating the rotary bias magnet 26 in the protective member covering the knob 12. In this embodiment, the rotary axis of the rotary bias magnet 26 is
Although the structure is parallel to the surface of the knob 12, it may be configured to intersect with the surface of the knob 12.
FIG. 5 is a perspective view of the locking / unlocking confirmation device according to the third invention.

In the improved embodiment of the second invention, since the Hall IC or the like is provided as the magnetoelectric conversion element, the battery, the LED, the switch and the like are indispensable. Although it depends on the frequency of use, even if a lithium battery is used, the battery needs to be replaced every two to three years. Therefore, it is an object of the present invention to provide a locking / unlocking confirmation device which can be used semi-permanently without requiring a battery.

In FIG. 5, an attracting member 13 a ′ made of a soft magnetic material or a semi-hard magnetic material is provided in the middle of the side end 12 a of the knob 12 of the key 11, and the side end 12 of the knob 12 is provided.
A concave portion 12g is formed on the cylinder body 20 side of a,
A tea tube-shaped capsule 25 'made of a transparent synthetic resin is provided in the recess 12g with its side end abutting the suction member 13a'. Further, in the capsule 25 ', a rotary magnet 26' consisting of a permanent magnet having a pair of diametrically magnetized cylindrical magnetic poles is rotatably enclosed, and passes through the rotary shaft and the pair of magnets. For example, the left half 26a 'is colored green and the right half 26b' is colored red.

The knob 12 of the key 11 is sandwiched by a protective member made of synthetic resin having a visual window (not shown) formed at a position corresponding to the rotary magnet 26 '. Since the structure of the cylinder body 20 is the same as that of the second invention, the description thereof will be omitted. A third invention, which is configured as described above, the first drive is a rotary magnet 26 'in the second half of the locking stroke the magnet N ₁
Approaching the first magnet R 1, the S magnetic pole of the rotary magnet 26 ′ faces the first drive magnet N ₁ , the N magnetic pole of the rotary magnet 26 ′ faces the attracting member 13 a ′, and the S magnetic pole extends in the key tip direction of the attracting member 13 a ′. Is magnetically induced, and the N magnetic pole is induced on the opposite side.

Even after the key 11 is removed, the suction member 13
If a'is a semi-hard magnetic material, the rotary magnet 26 'becomes the attracting member 13a' due to the interaction between the residual magnetic force of the attracting member 13a 'based on the magnetic induction and the magnetic force of the rotary magnet 26'. It is attracted and holds its position. When the attracting member 13a 'is made of a soft magnetic material, the residual magnetism described above disappears, but the rotary magnet 26' is attracted by magnetic induction by the magnetism of the rotary magnet 26 'and the position of the rotary magnet 26' is maintained. It

Therefore, when it is desired to confirm the locking / unlocking, when the rotary magnet 26 'is viewed from the viewing window, the left half 2
You can see that the green 6a 'is visible and that you have locked it. 'When approaching the second drive magnet S _4, the rotary magnet 26' rotary magnet 26 in the second half of the unlocking stroke N poles of faces the second drive magnet S _4, adsorption S pole of the rotary magnet 26 'member 1
While facing 3a ', the N magnetic pole is magnetically guided in the key tip direction of the attraction member 13a', and the S magnetic pole is guided to the opposite side.

Even after the key 11 is removed, the suction member 13
If a'is a semi-hard magnetic material, the rotary magnet 26 'becomes the attracting member 13a' due to the interaction between the residual magnetic force of the attracting member 13a 'based on the magnetic induction and the magnetic force of the rotary magnet 26'. It is attracted and holds its position. When the attracting member 13a 'is made of a soft magnetic material, the residual magnetism described above disappears, but the rotary magnet 26' is attracted by magnetic induction by the magnetism of the rotary magnet 26 'and the position of the rotary magnet 26' is maintained. It Therefore, when you want to confirm the locking / unlocking, when you look at the rotary magnet 26 'through the viewing window, the right half 26
You can see that b'red is visible and unlocked.

In this embodiment, the capsule 25 'has a tea-cylinder structure, but the cross section may be square or triangular. Further, the rotary magnet 26 ′ may be a sphere or a prism, and a rotary shaft may be provided to pivotally support the knob 12. Further, the capsule 25 'can be omitted by forming a recess for accommodating the rotary magnet 26' in the protective member covering the knob 12. In this embodiment, the rotary shaft of the rotary magnet 26 'has a structure parallel to the surface of the knob 12, but it may be arranged in a direction crossing the surface of the knob 12. In the embodiments of the second and third inventions, the description has been made based on the 18-inch cylinder, but rather the 36-type is the mainstream in the world, and the 45-type such as automobiles is in circulation.

In the case of using the 36-inch type, the drive magnet may be arranged as shown in FIG. 7B, and it is not always necessary to dispose it accurately on the X axis. In the case of using the 45-inch type, the drive magnets may be arranged as shown in FIG. 7C, and if the left and right operation angles of the key are about 35 degrees, they may be arranged at the left and right limit positions thereof. . By arranging in this way, it is also effective for keys whose key division is symmetrical. Further, although the drive magnet is arranged on the front surface of the cylinder in the above embodiment, it may be arranged on the escalation arranged on the outer circumference of the front surface of the cylinder.

[0060]

As described above, it is possible to provide an element capable of easily and surely storing and reading out magnetism, and erroneous display even when a key carried by the magnetic storage element is subjected to vibration or shock. It is possible to provide a highly reliable locking / unlocking confirmation device that does not require any operation, and a simple and inexpensive locking / unlocking confirmation device that does not require any battery or the like.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an embodiment according to the first invention.

FIG. 2 is an exploded perspective view of an embodiment according to the second invention.

FIG. 3 is a cross-sectional view of a first improved example of the second invention.

FIG. 4 is a perspective view of a second improved example of the second invention.

FIG. 5 is a perspective view of an embodiment according to the third invention.

[Explanation of symbols]

A, 13 Magnetic storage element 1, 13a Magnetic storage member 13a 'Adsorption member 2, 13b Hall IC 3 Drive magnet 4, 17 Switch 5, 15 Battery 6 Resistance 7, 16 LED 11 Key 12 knob N ₁ , N ₃ First drive Magnet S ₂ , S ₄ 2nd drive magnet 24 Bias magnet 25, 25 'Capsule 26 Rotary bias magnet 26' Rotary magnet

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[Procedure amendment]

[Submission date] November 15, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a partial perspective view of an embodiment according to the first invention.

FIG. 2 is an exploded perspective view of an embodiment according to the second invention.

FIG. 3 is a cross-sectional view of a first improved example of the second invention.

FIG. 4 is a cross-sectional view of a second improved example of the second invention.

FIG. 5 is a perspective view of an embodiment according to the third invention.

FIG. 6 is an exploded perspective view of a second conventional example.

FIG. 7A is a diagram showing an arrangement of a 18-inch drive magnet of a second conventional example. (B) is 3 of the second conventional example
It is an arrangement condition figure of a 6 type drive magnet. (C)
[Fig. 6] is a layout view of a 45-inch drive magnet of a second conventional example.

FIG. 8 is an operation explanatory view of a second conventional example.

[Explanation of reference numerals] A, 13 Magnetic storage element 1, 13a Magnetic storage member 13a 'Adsorption member 2, 13b Hall IC 3 Drive magnet 4, 17 Switch 5, 15 Battery 6 Resistance 7, 16 LED 11 Key 12 Knob N ₁ , N ₃ First drive magnet S ₂ , S ₄ Second drive magnet 24 Bias magnet 25, 25 'Capsule 26 Rotary bias magnet 26' Rotary magnet

Claims (5)

[Claims] 1. A magnetic memory element, such as a Hall element or a magnetoresistive effect element, wherein a magnetic memory member made of a semi-hard magnetic material is provided side by side with the magnetoelectric conversion element. 2. A lock cylinder and a key for operating the cylinder, and a magnetic-electric conversion element provided with a magnetic memory member made of a semi-hard magnetic material is provided on the knob of the key, and a battery, an LED and a switch. On the other hand, in the cylinder, in the vicinity of the locus through which the tip of the magnetic memory member passes in the latter half of the locking stroke by the key operation or the latter half of the unlocking stroke,
A drive magnet composed of a permanent magnet is provided on either the front surface of the cylinder or in the vicinity of the front surface of the cylinder, and the magnetic storage member is attached in a specific direction in response to a drive magnet near the final passage of the magnetic memory member in the latter half of the locking process. The magnetic poles of the drive magnet are set so that the magnetic storage member is magnetized and is magnetized in the opposite direction to the specific direction in response to the drive magnet in the vicinity where the magnetic memory member finally passes in the latter half of the unlocking process. A locking / unlocking confirmation device, wherein the magnetoelectric conversion element, battery, and the like arranged on the knob of the key,
At the time when the LED and the switch are connected and the switch is closed, the magnetoelectric conversion element detects at least one of the remanence directions of the remanence of the magnetic memory member, or a direction opposite to the particular direction. In addition, the locking / unlocking confirmation device is characterized in that the detection current causes the LED to emit light to display at least one direction of the residual magnetism of the magnetic storage member. 3. A key in a series of magnetic circuits from a drive magnet arranged in the vicinity of a cylinder to a magnetic memory member of a magnetic memory element provided on a knob of a key, and further through a magnetoelectric conversion element to the drive magnet. A bias magnet made of a permanent magnet is arranged at any position of the magnetic circuit on the side of the knob, and residual magnetism in a specific direction remaining in the magnetic memory member is biased by the bias magnet. The lock / unlock confirmation device according to claim 2. 4. A key in a series of magnetic circuits from a drive magnet arranged in the vicinity of a cylinder to a magnetic memory member of a magnetic memory element provided on a knob of a key, and further through a magnetoelectric conversion element to the drive magnet. A rotary bias magnet made of a permanent magnet is rotatably arranged on the side of the magnetic circuit on the side of the knob facing the drive magnet, and residual magnetism remaining in the magnetic storage member is urged by the rotary bias magnet. The lock / unlock confirmation device according to claim 2. 5. A lock magnet and a key for operating the cylinder are provided, and a drive magnet made of a permanent magnet is provided on either the front surface of the cylinder or in the vicinity of the front surface of the cylinder, and the side end of the knob of the key is provided. A rotary magnet, which is a permanent magnet having a pair of magnetic poles, is rotatably provided so as to face the drive magnet, and is made of a magnetic material such as a semi-hard magnetic material or a soft magnetic material in the vicinity of the rotary magnet. An adsorbing member is provided on the opposite side of the drive magnet side, and the rotary magnet is colored so that it can be identified that a specific magnetic pole of the rotary magnet is adsorbed on the adsorbing member.
A viewing window for the rotary magnet is formed on a protective member that covers the knob of the key, while the drive magnet sets a specific magnetic pole in the vicinity of the locus through which the side end of the rotary magnet passes in the latter half of the locking process by the key operation. In addition, in the latter half of the unlocking stroke, a lock / unlock confirmation device is provided in which a magnetic pole opposite to the specific magnetic pole is set in the vicinity of the locus through which the side end of the rotary magnet passes, the latter half or the unlocking stroke of the key operation. At the time when the rotary magnet finally passes near any of the drive magnets in the latter half of the lock stroke, the magnetic poles of the drive magnet and the magnetic poles of the different rotary magnet face the drive magnet, and the rotary magnet The magnetic pole of the rotary magnet of the same polarity as the magnetic pole faces the attraction member, After being removed from the cylinder, the magnetic pole of a rotary magnet having the same pole as the drive magnet attracts the attracting member to hold the position of the rotary magnet and to identify the rotary magnet. Lock / unlock confirmation device.