JP2005023753A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock difficult to copy. <P>SOLUTION: The cylinder lock has a rotor 5, which has a tumbler 4 driven by an unlocking code forming section 3 formed to a rotor inserting section 2 for an unlocking key 1 and is composed of a non-magnetic material, and a cylinder case 6, in which the rotor 5 is inserted rotatably. A key-material detector 7 consisting of a permanent magnet, which is positioned at a locking place closed while crossing over a rotational boundary with the cylinder case 6 under the state, in which the case 6 is not inserted into the rotor inserting section 2, attracted to the rotor inserting section 2 when the rotor inserting section 2 formed of a material having magnetic attraction is inserted and moved at an unlocking place, where the rotational boundary is opened, is arranged to the rotor 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cylinder lock.

  In general, a cylinder lock is configured by rotatably inserting a rotor having a tumbler driven by an unlocking cord forming portion of an unlocking key into a cylinder case. This is determined by whether or not a regular unlocking code forming unit is provided.

  As a result, it is possible to create a matching key by imitating the profile of the unlocking key, but if the unlocking key is excessively easy to replicate, the reliability of the locking system will also be reduced, so that it is difficult to replicate the cylinder. A lock set is required.

  And as a cylinder lock set which made duplication difficult, the thing using a magnet as described in patent documents 1 is proposed, for example.

In this conventional example, an appropriate number of magnets are embedded in the blade of the unlocking key, and the magnet is fixed to the tumbler in the rotor at a position corresponding to the unlocking key on the blade side, following the profile of the blade. Since it is not possible to drive the tumbler with the magnet fixed, the unlocking operation is prohibited.
Japanese Patent Publication No. 3-58628

  However, in the above-described conventional example, since a relatively strong magnet is fixed to the unlocking key that is often held at all times, the magnetic information carried by the magnetic card or the like may be affected. There's a problem.

  Moreover, the key using a magnet has a problem that it is suitable for reproduction by a small-scale facility.

  In other words, the unlocking key using the magnet is one that attracts and repels the rotor side magnet by the magnetic field of the magnet embedded in the blade and drives it to a predetermined unlocking position. It is desirable to be used.

  On the other hand, in the commercial key making companies in the market, in consideration of workability, etc., a blank material made of brass or the like is copied to duplicate keys, and when these are not used, for example, original keys are used. After mold-making with silicon rubber or the like, key duplication is performed by pouring a low melting point alloy such as tin or synthetic resin.

  The replica key obtained by these methods is that the blade is formed of a non-magnetic material as a result of processability or ease of molding due to a low melting point. After that, after analyzing the magnetic pole array of the genuine key, the rubber A duplicate key can be created by attaching a magnet or the like.

  The present invention has been made to eliminate the above drawbacks, and an object of the present invention is to provide a cylinder lock that is difficult to duplicate.

According to the present invention, the object is
A rotor 5 made of a non-magnetic material having a tumbler 4 driven by an unlocking cord forming portion 3 formed in a rotor insertion portion 2 of the unlocking key 1;
A cylinder case 6 into which the rotor 5 is rotatably inserted;
The rotor 5 is located at a locking position where the rotor insertion portion 2 is not inserted and is closed across the rotation boundary with the cylinder case 6;
A key material detector 7 made of a permanent magnet that is attracted to the rotor insertion portion 2 and moves to an unlocking position that opens the rotation boundary when the rotor insertion portion 2 formed of a material having magnet adsorption properties is inserted. This is accomplished by providing a cylinder lock in which is placed.

  The cylinder lock is formed by rotatably inserting the rotor 5 into the cylinder case 6, and in the rotor 5, in addition to the tumbler 4 driven by the unlocking cord forming portion 3 formed on the unlocking key 1, A key material detector 7 formed by a permanent magnet that is movable between the opening and closing position of the rotation boundary with the cylinder case 6 is disposed.

  The key material detector 7 is attracted by, for example, a magnet attracting portion 9 formed on the cylinder case 6 made of a nonmagnetic material, and rotates the rotor 5 across the rotation boundary with the cylinder case 6 in the rotor 5. It is held at the prohibited locking position. The holding force in this state is set to be equal to or less than the attracting force with respect to the rotor insertion portion 2 formed of a material having a magnet attracting property by reducing the attracting area of the magnet attracting portion 9. When the rotor insertion portion 2 is inserted into the key insertion portion of the rotor 5, the rotor insertion portion 2 is attracted to the rotor insertion portion 2 or sucked and moved in the direction of the rotor insertion portion 2. At this moving position, the key material detector 7 is completely retracted from the rotational boundary surface with the cylinder case 6, and thereafter, the unlocking cord forming portion 3 formed on the rotor insertion portion 2 is authentic. Rotation to 5 is allowed.

  Therefore, in the present invention, when the rotor insertion portion 2 is formed of a non-magnetic material such as brass or tin alloy, the key material detector 7 does not move from the locked position, so that the rotor 5 is rotated. It is not possible.

  In general, a magnetic material such as iron has a high hardness and melting point, and it is difficult to manufacture and process the rotor insertion portion 2 using such a magnetic material unless the factory has a specialized facility. In the present invention which requires that the second material is a magnetic material, it is impossible to create a key with a relatively simple method as in the prior art, and the locking reliability can be improved.

  The arrangement of the key material detector 7 can be set at an appropriate position by simply setting the locking position and the unlocking position in both the rotor 5 and the cylinder case 6, for example, as shown in FIG. 4. In addition, it is arranged in a direction crossing the moving direction of the tumbler 4 on the body portion of the rotor 5 where the tumbler 4 is arranged, or the key material detecting body 7 is formed in a plate shape, and between the tumbler 4 and the tumbler 4. Can be inserted.

  In the present invention, the key material detector 7 is different from a so-called magnet key that constitutes a key difference by the arrangement of the magnetic poles on the unlocking key 1 side, and the position of the key material detector 7 does not affect the unlocking operation. Absent. Accordingly, it is possible to randomly arrange the key material detector 7 at an appropriate position, and even if the authenticator of the authentic key tries to arrange iron or the like at the corresponding position of the key material detector 7, Since there is no means for uniquely knowing the position of the key material detector 7, it is forced to place an iron plate or the like on the entire duplication key, making duplication work virtually impossible.

  In this case, the key material detection body 7 made of a columnar body is loosely fitted in the rotor 5 and the detection body holding portions 10 and 10 ′ of the cylinder case 6 so as to be freely tiltable, and in the tilted state, the rotation boundary surface with the cylinder case 6. Is set so that the rotor is not opened, the rotation boundary surface is opened only when the entire rotor insertion portion 2 is made of a ferromagnetic material, or when the ferromagnetic material is correctly facing the key material detector 7, and replication is performed. If the location where the ferromagnetic material is attached to the key is deviated, the key material detector 7 is tilted. As a result, the rotation boundary surface can be kept closed, and the reliability can be further improved.

  As described above, the magnetic pole direction of the key material detector 7, that is, the moving direction can be determined as appropriate. However, when the magnetic pole is arranged facing the wide surface of the rotor insertion portion 2 having a rectangular cross section, the rotor Since the key guide groove 2a and the like are generally formed on the wide surface of the insertion portion 2, it is necessary to apply a magnetic material while leaving the key guide groove 2a and the like. Become.

  In particular, as shown in FIG. 4, when the tumbler 4 is driven by being fitted to a groove-shaped unlocking cord forming portion 3 formed on the wide surface of the rotor insertion portion 2, the unlocking cord Since it becomes necessary to paste the magnetic material while leaving the formation portion 3, the duplication becomes more difficult.

  As described above, when the rotor insertion portion 2 is inserted, the key material detector 7 is held at the locked position so as to exert an adsorption force to the extent that it is detached and sucked to the rotor insertion portion 2 side. This can be achieved by forming the magnet attraction portion 9 of a certain area in the cylinder case 6, but when using a plurality of key material detectors 7, hold them in the locked position by using mutual repulsion. Can do.

  In this case, a pair of key material detectors 7 are arranged with the same magnetic poles facing each other across the key insertion hole 8 formed in the rotor 5, and held in the locked position by mutual repulsion when the rotor insertion portion 2 is not inserted. In the case where the cylinder lock is configured, when the rotor insertion portion 2 formed of a magnetic material having a high magnetic permeability such as iron is inserted into the key insertion hole 8, the magnetic lines of force of the key material detection body 7 arranged opposite to each other are generated. It is drawn into the rotor insertion part 2. As a result, the rotor insertion portion 2 is in a state in which the key material detectors 7 are magnetically shielded from each other, the repulsive force is eliminated, and both are attracted to the rotor insertion portion 2 and moved to the unlocked position.

  On the other hand, when the rotor insertion portion 2 is formed of a non-magnetic material as in the case of an illegally duplicated key, the magnetic force lines of the key material detector 7 penetrate the rotor insertion portion 2 and the repulsive force is eliminated. Never move to the unlocked position. In addition, when a material having a high magnetic permeability is pasted on the unauthorized duplication key, it is necessary to affix a plate having a thickness that can cancel the repulsive force, making it difficult to create the duplication key.

  According to the present invention, by adding the material of the key to the unlocking conditions, the key cannot be unlocked by a key that has been duplicated by simple molding of tin alloy or the like. For this reason, it becomes difficult to copy the unlock key, and the safety is improved.

  1-3 shows a cylinder lock set to which the present invention is applied. The cylinder lock set includes a cylinder lock A and an unlock key 1 for locking and unlocking the cylinder lock A.

  As shown in FIG. 3, the unlocking key 1 is formed by forming a head portion 1 a at one end of a plate-like rotor insertion portion 2. The rotor insertion portion 2 is formed of a magnetic material such as iron, and the material end surface (narrow surface) is cut in a sawtooth shape to drive the tumbler 4 described later to a predetermined position in the rotor 5. Forming part 3 is formed. Further, a key guide groove 2a serving as a guide when the rotor insertion portion 2 is inserted into the rotor 5 is formed over a substantially entire length on a wide surface orthogonal to the surface on which the unlocking cord forming portion 3 is formed. .

  On the other hand, the cylinder lock A is formed by rotatably inserting the rotor 5 into the cylinder case 6. In the rotor 5, the tumbler 4 urged by the compression spring 11 in the protruding direction from the rotor 5 is movably mounted. The cylinder case 6 and the rotor 5 are formed of a nonmagnetic material such as a zinc die cast alloy, and the tumbler 4 and the compression spring 11 are also formed of a nonmagnetic material.

  In the locked state shown in FIG. 1, the tumbler 4 is urged by the compression spring 11 and protrudes into a locking recess 6 a formed on the inner periphery of the cylinder case 6. The rotation boundary surface is blocked across the rotation boundary surface formed of a cylindrical curved surface formed therebetween, and the rotation of the rotor 5 is prohibited.

  When the rotor insertion portion 2 is inserted from this state, each tumbler 4 is forcibly driven to the depth position of the unlocking cord forming portion 3 against the urging force of the compression spring 11, and the unlocking cord forming portion 3 When the depth of cut is authentic, each tumbler 4 is completely accommodated in the rotor 5 as shown in FIG. 3A. As a result, the rotation boundary surface is opened and the rotation to the rotor 5 is performed. Operation is allowed.

  Further, in order to add the material of the rotor insertion portion 2 to the transition condition from the locked state to the unlocked state, the key material detector 7 is disposed in the cylinder lock A. The key material detector 7 is formed of a permanent magnet. 1 to 4 show a cylindrical key material detector 7, the shape can be appropriately changed to a spherical shape, a plate shape, or the like.

  In this embodiment, a total of three key material detectors 7 are arranged, two at the head of the rotor 5 and one at the end of the rotor 5. As shown in FIG. 2 (a), the two arranged in the head are arranged in opposite directions across a key insertion hole 8 having a rectangular cross section formed in the rotor 5. In order to hold the pair of key material detectors 7 on the wide surface of the key insertion hole 8 so as to be movable in the orthogonal direction, the head of the rotor 5 and the inner periphery of the cylinder case 6 communicate with each other at the locking rotation position of the rotor 5. Detector body holding portions 10 and 10 'are formed.

  Further, the pair of key material detectors 7 are arranged so that the same magnetic poles face each other, and when the rotor insertion portion 2 is not inserted, the mutual repulsive force causes a mutual repulsive force as shown in FIG. It is held at a position (locking position) where the rotation boundary surface with the cylinder case 6 is closed.

  When the rotor insertion portion 2 formed of a magnetic material is inserted in this state, as shown in FIG. 3B, each key material detection body 7 is attracted to the rotor insertion portion 2 and enters the rotor 5 inward. As a result, the rotation boundary surface is released (unlocked state).

  On the other hand, when the rotor insertion portion 2 is a non-magnetic material, the repulsive force is not lost or weakened because the magnetic lines of force of the pair of key material detectors 7 are not sucked. Remains in the locked position.

  Each component described in the present embodiment describes a specific shape or the like for easy understanding, but the conditions attached to the component such as the shape are not essential, Excluding these conditions is also within the scope of the disclosure herein. That is, for example, the rotor insertion portion 2 may have a cylindrical shape in addition to the flat plate shape, and in this case, the key insertion hole 8 is formed in a circular cross section.

  Further, in FIGS. 1 to 3, the key material detector 7 is shown as being movable in the orthogonal direction with respect to the wide surface of the key material detector 7, but in the case of moving in the orthogonal direction with respect to the narrow surface. Alternatively, the case where these intersect with each other at an angle other than 90 ° is also included.

  In addition, in FIG. 1, the key material detector 7 is arranged at a position that is correctly opposed. However, when the rotor insertion portion 2 formed of a magnetic material is not inserted, the key material detector 7 repels each other by repulsive force and enters the locked position. Deviations are allowed provided that they are held.

  Further, the cylinder lock A on which only one of the two key material detectors 7 disposed on the head is mounted is also within the scope of disclosure, and the arrangement on the head and the key material detector 7 are not matched. It is within the scope of the disclosure other than the use.

  Next, the key material detector 7 disposed at the end portion of the rotor 5 is disposed at the tip corresponding position of the rotor insertion portion 2. This key material detector 7 is attracted to a magnet attracting portion 9 formed of a material such as iron having magnet attractability fixed to the cylinder case 6 and is held in the locked position.

  In addition to this, the retentive force due to the lines of magnetic force from the two key material detectors 7 can also be used for holding in the locked position. When holding in the locked position by using repulsive force from other key material detectors 7, the number of other key material detectors 7 is not limited to two, and the case of one or more than three is also disclosed. It is a range. Further, when the repulsive force from the two key material detectors 7 is used, it is desirable to arrange the three key material detectors 7 at the vertices of an isosceles triangle as shown in FIG. However, other arrangement conditions are possible.

  As for the detection body holding part 10 'on the cylinder case 6 side for holding the key material detection body 7, the locking recess 6a is diverted, and further, the detection body holding part 10 on the rotor 5 side is as shown in FIG. The key material detector 7 has a size that allows the key material detector 7 to be freely fitted and tilted. When the rotor insertion portion 2 formed of a magnetic material is inserted, the key material detector 7 is tilted as shown in FIG. , Open the rotation boundary.

  The key material detector 7 disposed at the end of the rotor 5 shows a case where the rotation boundary surface is opened by a tilting operation and a case where the moving direction is parallel to the wide surface of the key insertion hole 8. When the key material detector 7 is disposed at the end of the rotor 5, the scope of the disclosure is not limited to the fact that the key material detector 7 moves in a plane parallel to the wide surface. It is within the scope of the disclosure to move the arranged key material detector 7 in a direction intersecting the wide surface.

  Therefore, in the present invention, when the rotor insertion portion 2 is made of a material that does not have magnet attraction, that is, a non-magnetic material, the key material detector 7 is held in the locked position. Even if only the forming unit 3 is copied, the cylinder lock cannot be unlocked.

  As a result, the copy key must be made of iron or the like, making it difficult to duplicate for illegal activities.

It is a figure which shows this invention, (a) is a partial cross section figure, (b) is a figure which cut | disconnects and shows only a cylinder case from the 1B-1B direction of (a). 2A is a cross-sectional view taken along line 2A-2A in FIG. 1A, and FIG. 1B is a cross-sectional view taken along line 2B-2B in FIG. 1A is a diagram corresponding to FIG. 1A, FIG. 3B is a cross-sectional view taken along line 3B-3B of FIG. 3A, and FIG. It is the 3C-3C sectional view taken on the line of Fig.3 (a). It is a figure which shows the modification of FIG. 1, (a) is partial sectional drawing, (b) is the 4B-4B sectional view taken on the line of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unlocking key 2 Rotor insertion part 3 Unlocking code formation part 4 Tumbler 5 Rotor 6 Cylinder case 7 Key material detection body 8 Key insertion hole

Claims (4)

A rotor made of a non-magnetic material having a tumbler driven by an unlocking cord forming part formed in a rotor insertion part of an unlocking key;
A cylinder case in which the rotor is rotatably inserted;
The rotor is positioned at a locking position where the rotor insertion part is not inserted and is closed across the rotation boundary with the cylinder case,
A key material detector comprising a permanent magnet that is attracted to the rotor insertion portion and moves to an unlocking position that opens the rotation boundary when a rotor insertion portion formed of a material having magnet adsorption properties is inserted is disposed. Cylinder lock. 2. The cylinder lock according to claim 1, further comprising a plurality of key material detectors arranged such that the magnetic poles are directed in the repulsive force generation direction and held at the locking position by the repulsive force. The cylinder lock according to claim 2, wherein the key material detector is disposed at an opposing position across a key insertion hole formed in the rotor. 4. The cylinder lock according to claim 1, wherein the key material detector is disposed with a magnetic pole facing a wide surface of a rotor insertion portion having a rectangular cross section.

Images