JPH11101031A - Magnetic card lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent use of a false card and to enable smooth operation of a genuine card. SOLUTION: This device is provided with a magnetic shield plate 11 arranged in a housing to which a magnetic card is inserted, a non-magnetic lock plate 14 having a lock hole 14a to be engaged with a plurality of lock magnets 13 attracted to the shield plate 11, and a plurality of recess parts 15 for receiving and holding the lock magnets 13. Moreover, at least one recess part 15 has a stepped part, and a holding member 16 is provided, which is capable of relative sliding at the time of unlock. And elastic members 21 and 22 for regulating the lock magnet which prevent movement due to vibration and so on of the lock magnet 13 in the predetermined recess part 15 and prevents movement of the holding member 16 are mounted to the holding member 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card lock device for unlocking a magnetic card by inserting and pressing the key.

[0002]

2. Description of the Related Art Conventionally, as this type of magnetic card lock device, for example, those shown in FIGS. 10 and 11 are known.

As shown in FIG. 10, this magnetic card lock device includes a magnetic shield plate 11 and a non-magnetic cover plate 12 which are disposed opposite to each other in a housing 10a constituting a door knob 10, and the shield A non-magnetic lock plate 14 having a plurality of lock holes 14a into which a plurality of lock magnets 13 attracted by the plate 11 are engaged, and fixed to the housing and arranged adjacent to the cover plate 12.
A part of the lock magnet 13 is hooked when locking, that is, only a part of the lock magnet 13 is received, and a plurality of recesses 15 are received and held when unlocking, and the lock plate 13 is unlocked when unlocked. And a slide member 16 that slides along 14. In FIG. 11, reference numeral 17 denotes the shield plate 11.
Is a coil spring for urging the slide member 16 upward in FIG.

At the time of locking, as shown in FIG.
The plurality of lock magnets 13 attracted to the shield plate 11 are engaged with the lock holes 14 a of the lock plate 14 and abut against the cover plate 12, and a part of the lock magnet 13 is caught by the concave portion 15 and slides. The member 16 is restrained in the locked position.

As shown in FIG. 12, a regular magnetic card A is inserted into a magnetic card insertion slot 10 b of a housing 10.
(See FIG. 11) and inserted between the shield plate 11 and the cover plate 12. At the time of unlocking, as shown in FIG.
Due to the magnetic repulsion acting between the plurality of magnetic spots a provided on the magnetic card A (which are magnetized to have the same polarity as the end face of the lock magnet 13 on the magnetic card A side) and the plurality of lock magnets 13, The lock magnet 13 separates from the cover plate 12 and falls into the recess 15, so that the slide member 16 is in a free state. When the magnetic card A is further pushed in, the slide member 16 slides by the dimension L from the locked position (FIG. 11) to the unlocked position (FIG. 12) by the magnetic card A against the elastic force of the coil spring 18. .

[0006]

However, as shown in FIG. 13, the magnetic card lock device inserts a fake card, for example, a fake card B made of plastic having the same shape and the same size as a regular magnetic card A. The slide member 16 is slightly moved by the dimension M,
Is fixed between the lower inner peripheral surface of the lock hole 14a in the drawing and the upper inner peripheral surface of the recess 15 in the drawing, and when vibration is applied from outside the housing 10 in this state, the vibration is When transmitted to the lock magnet 13, the lock magnet 13 may gradually move toward the concave portion 15 and fall into the concave portion 15. Actually, when a plurality of lock magnets 13 are provided, there is almost no possibility that all the lock magnets 13 fall into the concave portion 15 at the same time. 13
When there is only one, there is a possibility that the above inconvenience may occur.

[0007] In order to solve the above problems, the present applicant has
Japanese Patent Application No. 3-286167 (Japanese Unexamined Patent Application Publication No. 5-125863)
No. 7-37751), one lock magnet 13 is divided into two magnet pieces separated in the axial direction, and the step portion 1 is provided in the middle of the concave portion 15 of the slide member 16.
5a, when the fake card B is inserted and the slide member is slid a little less than the regular distance, one magnet piece remains in the recess 15 but the other magnet piece is non-magnetic. By remaining engaged with the lock hole 14a of the lock plate 14 (that is, the two lock magnet pieces are eccentric to each other), the sliding operation of the slide member 16 and the false card B is prevented, and the false card B is prevented. Proposed to prevent unlocking. According to this, even if vibration is applied from the outside, the other magnet piece abuts on the step portion 15a and cannot move down, so that the above-mentioned inconvenience is reliably prevented.

However, in the proposal of Japanese Patent Application No. 3-286167, for example, only one lock magnet among a plurality of normal type lock magnets is divided into two, and all of them are formed into the same type of lock magnet. Therefore, the processing cost is high and the handling is inconvenient. Further, after the two lock magnet pieces are eccentric to each other, the two lock magnet pieces are again concentric so as to be able to fall into the recess 15 when the regular card A is inserted. In spite of having to return, there is a problem that insertion of the next legitimate card may not be successful because it does not actually return to the concentric state.

Accordingly, an object of the present invention is to apply vibration from the outside to the housing with a fake card inserted while using only a single type lock magnet of a normal type without using a separate type lock magnet piece. There is no danger that the lock magnet will move and fall into the recess even if you try to move the lock magnet, and when the regular card is inserted, the lock magnet will surely fall into the recess of the slide member and secure the insertion of the regular card. And to provide a magnetic card lock device that is acceptable.

[0010]

In order to achieve the above object, the present invention provides a magnetic shield plate (11) arranged in a housing into which a magnetic card is inserted, and a magnetic shield plate (11) arranged along the shield plate, A non-magnetic lock plate (14) having a plurality of lock holes (14a) with which a plurality of lock magnets (13) attracted to the shield plate engage, and receives and holds the plurality of lock magnets (13), respectively. A lock magnet holding member (16) having a plurality of recesses (15), at least one predetermined recess (15) having a step (15A), and being slidable relative to the lock plate when unlocked. And a lock magnet regulating elastic member (21, 21) attached to the lock magnet holding member (16) and disposed close to the lock magnet in the predetermined recess (15). 2), and when the fake card (B) is inserted, one of the lock plate (14) and the lock magnet holding member (16) slides a little distance with the fake card with respect to the other. The inner wall of the predetermined recess (15) and the inner wall of the lock hole (14a) press the lock magnet therein to rotate against the elastic force of the elastic members (21, 22), and A magnetic card lock device characterized by being engaged with a portion (15A).

[0011]

According to the present invention, when a fake card is inserted,
The lock magnet rotates while pressing the lock magnet regulating elastic member and engages with the step of the recess, so that even if vibration is applied from the outside, the lock magnet does not fall into the recess and further insertion of the fake card. In addition, when the card is pulled out, the lock magnet is rotated and returned to a normal position by the elastic force of the elastic member, so that the next time the regular card is inserted, it can be properly dropped into the recess. The insertion of the regular card is permitted.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 1 shows an embodiment of the magnetic card lock device according to the present invention, in which a magnetic card is not inserted at all. In FIG. 1, the same parts as those in FIGS. 11 to 13 are denoted by the same reference numerals.

The overall structure of the magnetic card lock device of the present embodiment is different from that of the prior art shown in FIG.
A spring plate 21 made of a nonmagnetic material such as stainless steel or phosphor bronze, which slides integrally with the slide member, is interposed between the slide member 16 and the lock member 16 (lock magnet holding member).

The slide member 16 is a lock magnet 1
3 has a plurality of recesses 15 for receiving and holding, of which at least one predetermined recess 15 has a cross-sectional shape combining a semicircle and a rectangle as shown in FIGS. A step 15A is provided at a predetermined height from the bottom. It is needless to say that two or more predetermined recesses 15 may be provided, and other recesses than the predetermined recess 15 are not shown, but have a normal circular cross section like the conventional recess 15 in FIG. As shown in FIG. 3, the spring plate 21 integrally has at least one bent tongue piece 22 (an elastic member for regulating a lock magnet). Is inserted until it approaches the step 15A on the rectangular section side. In addition,
The tongue piece 22 has a substantially U-shaped hollow shape, but may have a solid shape. It may have a planar shape.

When the slide member 16 is in the locked position shown in FIG. 1, the movement of a known lock mechanism (not shown) is restricted by the slide member 16, and the door knob is in a locked state so that it cannot rotate. . Also, the slide member 16
When the lock mechanism reaches the unlocked position indicated by the two-dot chain line with the regular magnetic card A in FIG. 4 as described later, the lock mechanism is released from the restraint of the slide member 16, and the door knob is in an unlocked state in which the door knob is rotatable. .

Next, the operation of the magnetic card lock device will be described.

When the magnetic card is not inserted, as shown in FIG.
Is engaged with the lock hole 14a of the lock plate 14 while the suction
, And the slide member 16 is located at the locked position by the coil spring 18. The lock magnets (not shown) are in the same state in the other ordinary recesses 15 as well.

Next, when the regular magnetic card A is inserted between the shield plate 11 and the cover plate 12 as shown in FIG. 4, a magnetic spot a provided on the magnetic card A and the lock magnet 13 are generated. Due to the magnetic repulsion, all the lock magnets 13 separate from the cover plate 12 and fall into the recesses 15 of the slide member 16. As a result, the slide member 16 is in a free state. When the magnetic card A is further pushed in this state, the slide member 16 is unlocked against the elastic force of the coil spring 18 as shown by a two-dot chain line in FIG. It is slid to the position by the dimension L to be in the unlocked state.

Next, as shown in FIG. 5, a plastic fake card B having the same shape and the same size as the magnetic card A is inserted between the shield plate 11 and the cover plate 12 similarly. The slide member 16 slightly slides by the dimension M. Then, the lock member 13 is displaced downward in the drawing by the slide member 16 while being attracted to the cover plate 12 side. Then, the lock magnet 13
The end of the cover plate 12 on the opening side of the recess 15 and the upper edge 15B and the lower edge 1 of the lock hole 14a
4b, a rotational moment is generated, and is rotated counterclockwise against the elastic force of the tongue piece 22 to engage with the step 15A as shown in FIG. The magnitude of the rotational moment can be appropriately adjusted by changing the axial distance between the two edge portions 15B and 14b, that is, the thickness of the spring plate 21.

Therefore, in the state of FIG. 5, even if vibration is applied from outside the housing 10, the lock magnet 13
Is prevented from falling into the bottom of the recess 15 by being caught by the step 15A. As a result, the slide member 16 does not enter a free state and maintains a locked state.

As can be seen from FIG. 5, when the lock magnet 13 is rotated to deform the tongue piece 22, a part of the circular outer peripheral portion of the lock magnet 13 is formed into a U-shaped tongue piece 22. Since the lock magnet 13 enters the hollow portion, the lock magnet 13 itself is automatically aligned, and the lock magnet 13 does not fluctuate.

Next, when the fake card B is pulled out, the slide member 16 slides upward and returns to the position shown in FIG.
The lock magnet 13 is also rotated and returned by the elasticity of the tongue piece 22, and returns to the normal position in FIG. 1 accurately. Therefore, it is possible to prevent such a disadvantage that the lock magnet once displaced does not return to the normal position, so that the next normal card cannot be inserted properly.

The lock magnet restricting elastic member is not limited to the bent tongue piece 22 of the spring plate 21. For example, as shown in FIG. 7 (illustration of the shield plate 11 and the cover plate 12 is omitted), Each bent tongue piece member 23 may be fixed with a screw 24, or, as shown in FIG. 8, an elastic member 25 such as rubber is adhered to the upper inner wall of the stepped portion 15A of the concave portion 15 and the elasticity thereof is used. Lock magnet 13
9 or, as shown in FIG. 9, a coil spring 26 is provided on the upper inner wall of the step 15 </ b> A of the recess 15.
May be embedded to press the lock magnet 13, and various other methods are conceivable.

In the embodiment shown in FIGS. 1 to 6, the slide member 16 and the spring plate 2 are inserted together with the insertion of the card.
1, the shield plate 11, the cover plate 12, and the lock plate 14 were stationary.
As is apparent from this configuration, conversely, the shield plate 11, the cover plate 12, and the lock plate 14 slide integrally with the insertion of the card, and the slide member 16 and the spring plate 2
Needless to say, a configuration in which 1 is stationary may be employed.

[0025]

As described above, according to the present invention, the following effects can be obtained.

When a false card is inserted into at least one of the plurality of lock magnets, the lock magnet presses the lock magnet regulating elastic member (such as the tongue piece 22 of the spring plate 21) when the false card is inserted. Since it rotates and engages with the stepped portion of the concave portion, even if vibration is applied from the outside, the lock magnet can reliably prevent further insertion of the fake card without falling into the concave portion.

In addition, when the card is removed, the lock magnet can be accurately rotated and returned to the proper position by the elastic force of the elastic member. As a result, insertion of the regular card is well tolerated.

Compared with the conventional example in which one lock magnet is divided into two, the lock magnets can be all of the same single type, so that the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view showing a magnetic card lock device according to an embodiment of the present invention at the time of locking.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view of a main part of a spring plate.

FIG. 4 is an enlarged sectional view when a regular magnetic card is inserted.

FIG. 5 is an enlarged sectional view when a fake magnetic card is inserted.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 5;

FIG. 7 is a sectional view of a first modification of the lock magnet regulating elastic member.

FIG. 8 is a sectional view of a second modification of the lock magnet regulating elastic member.

FIG. 9 is a sectional view of a third modification of the lock magnet regulating elastic member.

FIG. 10 is a side view of a door knob equipped with the magnetic card lock device of the embodiment.

FIG. 11 is a cross-sectional view of the related art when locking.

FIG. 12 is a cross-sectional view when unlocking is performed using the regular card.

FIG. 13 is a cross-sectional view when unlocking with the fake card.

[Explanation of symbols]

A legitimate magnetic card B fake card 10 door knob 10a housing 11 shield plate 12 cover plate 13 lock magnet 14 lock plate 14a lock hole 15 recess 15a, 15A step 16 slide member (lock magnet holding member) 17 leaf spring 18 coil spring 21 Spring plate 22 Elastic tongue part (elastic member for lock magnet restriction) 23 Tongue member (elastic member for lock magnet restriction) 25 Elastic member (elastic member for lock magnet restriction) 26 Coil spring (elastic member for lock magnet restriction)

Claims (9)

[Claims] 1. A magnetic shield plate (11) arranged in a housing into which a magnetic card is inserted, and a plurality of lock magnets (13) arranged along the shield plate and attracted by the shield plate. A non-magnetic lock plate (1) having a plurality of lock holes (14a) to be engaged.
4) and a plurality of recesses (15) for receiving and holding the plurality of lock magnets (13), respectively, and at least one predetermined recess (15) has a step (15A). A lock magnet holding member (16) slidable relative to the lock plate, and attached to the lock magnet holding member (16);
A lock magnet regulating elastic member (21, 2) disposed in the predetermined recess (15) and close to the lock magnet.
2), when inserting the fake card (B), one of the lock plate (14) and the lock magnet holding member (16) slides a little distance with the fake card with respect to the other. The inner wall of the predetermined recess (15) and the inner wall of the lock hole (14a) press the lock magnet therein to rotate against the elastic force of the elastic members (21, 22), and A magnetic card lock device, wherein the magnetic card lock device is engaged with a portion (15A). 2. The magnetic card lock device according to claim 1, wherein the non-magnetic lock plate (14) is fixed to a housing (10a), and the lock magnet holding member (16).
The device can slide integrally with the lock magnet regulating elastic members (21, 22) when the card (A or B) is inserted. 3. The magnetic card lock device according to claim 1, wherein the lock magnet holding member (16) and the lock magnet regulating elastic members (21, 22) are fixed to a housing (10a), and the lock plate is provided. (14)
The said device which can slide when a card (A or B) is inserted. 4. The magnetic card lock device according to claim 1, wherein the elastic member includes the lock magnet holding member (1).
6) elastic tongue pieces (22) each formed by bending one spring plate (21), and each of the elastic tongue pieces (22) corresponds to each of the predetermined recesses (13). The said apparatus is arrange | positioned close to the lock magnet of said, The said apparatus. 5. The magnetic card lock device according to claim 1, wherein the elastic member has an elastic tongue piece (22) disposed close to a lock magnet.
The said device is an individual leaf spring (23) provided corresponding to each. 6. The magnetic card lock device according to claim 4, wherein the elastic tongue portion (22) has a substantially U-shaped hollow shape. 7. The magnetic card lock device according to claim 4, wherein the elastic tongue portion (22) has a solid shape. 8. The magnetic card lock device according to claim 1, wherein the elastic member is an elastic member made of rubber or the like disposed in the predetermined recess in proximity to a lock magnet.
The device, wherein: 9. The magnetic card lock device according to claim 1, wherein the elastic member is a coil spring (26) disposed in the predetermined recess (15) near a lock magnet. Said apparatus.