JP4101170B2 - Cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock, and more particularly, to a cylinder lock with improved resistance to unauthorized unlocking and improved safety.

  There are various types of cylinder locks, one of which is a lever tumbler lock, as shown in FIGS. 1 and 2, an outer cylinder 2 in which a cam groove 1 is formed along a generatrix on the inner peripheral surface. And a plurality of partition plates 3 and 3 that are rotatably fitted to the outer cylinder and are stacked in the central axis direction through a gap, and an inner cylinder 5 that penetrates the key hole 4 along the central axis line. And extending along the generatrix of the inner cylinder 5 and guided so as to be movable in the radial direction at the outer peripheral portion of the inner cylinder, and the outer edge engaged with the cam groove 1 in a direction protruding outward And a biased locking bar 6.

  Further, each slot 7 between the partition plates is substantially C-shaped as a whole and is pivotally supported at one end so as to be swingable, and is urged in a direction that interferes with the side edge of the key inserted into the key hole. At the same time, a lever tumbler 11 that is locked to a backup pin 8 that penetrates the inner cylinder in the axial direction and that has an unlocking notch 9 that receives the inner edge of the locking bar 6 at the outer edge of the free end is inserted. ing.

  When each of these tumbler groups is engaged with the corresponding keyway of the key inserted through the key hole, the unlocking notch 9 of each lever tumbler 11 is aligned with the inner edge of the locking bar 6 (not shown). ) Is configured as follows.

  Therefore, when the key is inserted into the key hole 4 and the inner cylinder 5 is relatively rotated in the outer cylinder 2, the inner cylinder of the locking bar 6 is caused by the wedge action generated between the cam groove 1 and the locking bar 6. In other words, the lever tumbler lock is unlocked and the inner cylinder 5 rotates in the unlocking direction.

  In FIGS. 1 and 2, reference numeral 12 denotes a support shaft that penetrates one end of the lever tumblers 11 and 11 in common and rotatably supports them.

  Further, as shown in FIG. 3, the rotary disk tumbler lock which is another type of cylinder lock and has been proposed by the present applicant according to Patent Document 1 described later is a key having a size capable of enclosing a key hole at the center. An annular rotary disk tumbler 14 having an insertion hole 13 is inserted, and one of its substantial parts is pivotally supported on a support shaft 12 penetrating the inner cylinder in the axial direction, and outside the free end. An unlocking notch 9 is formed at the end edge, and on the other hand, at the opening end edge of the key insertion hole, the engagement trajectory of the tip interferes with the flat part or the edge part of the blade of the key 15 inserted into the key hole The protrusions 16 are integrally projected, and each rotary disk tumbler 14 is urged in a direction in which the engaging protrusions are close to the key.

  In a normal state, the rotary disk tumbler 14 is locked to a backup pin 8 penetrating the inner cylinder in the axial direction. On the other hand, each of the engagement protrusions of these tumbler groups is formed into a keyed blade inserted into the key hole. In addition, the unlocked cutout of each rotary disk tumbler is aligned with the inner edge of the locking bar when engaged with the corresponding recess 17.

  In FIG. 3, reference numeral 18 denotes a leaf spring that biases the engaging protrusion 16 in the keying direction.

  Lever tumbler locks and rotary disc tumbler locks having the above-described configuration are becoming mainstream before the locks of dwelling units because they are reliable and easy to use.

  However, in recent years, a key duplication tool described in Patent Document 2 described below has been proposed and seems to be commercially available.

  This key duplication tool is a key duplication tool for the lever tumbler lock according to the manufacture and sale of the applicant of the present application, and can also be applied to a rotary disc tumbler lock.

And with this duplication tool, there is an effect that you can easily duplicate the key if you lose the key or lock it with the key left in the room. For example, unauthorized unlocking becomes easier, in other words, a device that is against public order and morals.
JP 2003-226833 A Registered Utility Model No. 3063990

  In view of this, an object of the present invention is to provide a cylinder lock that prevents a key difference from being searched for by the key duplicating tool described in Patent Document 2 above, and thereby to increase the safety of the cylinder lock.

In order to achieve the above object, an invention according to claim 1 is characterized in that an outer cylinder having a cam groove formed along a generatrix of an inner peripheral surface, and an outer cylinder that is rotatably fitted to the outer cylinder, along the central axis. An inner cylinder that penetrates the key hole and an outer edge that extends along the generatrix of the inner cylinder and that is guided to move radially in the outer periphery of the inner cylinder, and that engages with the cam groove. And a locking bar biased in the direction of projecting in the direction, and each of the inner cylinders is substantially C-shaped and is pivotally supported with one end pivoted on a support shaft and inserted into a key hole. It is urged in a direction that interferes with the side edge of the formed key, and is normally locked to a backup pin that penetrates the inner cylinder in the axial direction, and receives the inner edge of the locking bar at the outer edge of the free end. A plurality of lever tumblers with unlocked cutouts are arranged along the keyholes. When each member is engaged with the corresponding keyway of the key inserted through the key hole, the unlocking notch of each lever tumbler is aligned with the inner edge of the locking bar, and the lever tumbler is stored At least one of the partition plates that hold the slot is raised at the keyhole opening edge on the locking bar side so that it does not interfere with the lever tumbler, so that a flat thin wire is formed in the gap between the lever tumbler lock partition plate and the lever tumbler. It is characterized in that it is prevented from being inserted .

According to the second aspect of the present invention, an outer cylinder in which a cam groove is formed along the generatrix of the inner peripheral surface, and the outer cylinder are rotatably fitted, and the key hole is penetrated along the central axis. The inner cylinder extends along the generatrix of the inner cylinder, is guided in a radially movable manner at the outer peripheral portion of the inner cylinder, and the outer edge engaged with the cam groove protrudes outward. A side end of a key that is inserted into the key hole and has a biased locking bar, and is supported in a pivotable manner with one end portion pivotally supported on the inner cylinder. It is urged in a direction that interferes with the edge, and is normally locked to a backup pin that penetrates the inner cylinder in the axial direction, and an unlocking notch for receiving the inner edge of the locking bar is formed on the outer edge of the free end. A plurality of lever tumblers are arranged along the keyhole, and each of these tumbler groups is inserted through the keyhole. When engaged with the corresponding keyway of the combined key, the unlocking notch of each lever tumbler is aligned with the inner edge of the locking bar, and at least one of the partition plates holding the slot in which the lever tumbler is accommodated In the sheet, a concave portion extending in the width direction of the key hole is formed between the key hole and the unlocking notch, so that a flat thin line is formed in the gap between the partition plate of the lever tumbler lock and the lever tumbler. It is characterized by preventing insertion .

Furthermore, the invention described in claim 3 is an outer cylinder in which a cam groove is formed along a generatrix of the inner peripheral surface, and is rotatably fitted to the outer cylinder and stacked in the central axis direction through a gap. In addition to providing a plurality of partition plates, the inner cylinder extends through the key line along the central axis and the generatrix of the inner cylinder, and is guided to be movable in the radial direction at the outer periphery of the inner cylinder. And a locking bar urged in a direction in which an outer edge engaged with the cam groove protrudes outward, and each slot between the partition plates can surround a key hole at the center. An annular rotary disk tumbler with a key insertion hole is inserted, and one of its substantial parts is pivotally supported on a spindle that penetrates the inner cylinder in the axial direction, and the outer end of the free end An unlocking notch is formed at the edge, while the movement trajectory of the tip is the key hole at the opening edge of the key insertion hole. Engagement protrusions that interfere with the flat part or edge of the inserted key lock blade are integrally projected, and each rotary disk tumbler is urged in the direction in which the engagement protrusion approaches the key lock. When the cylinder is locked to the backup pin penetrating in the axial direction, on the other hand, each of the engagement protrusions of these tumbler groups is engaged with the corresponding recess formed in the keyed blade inserted through the key hole. The unlocking notch of the rotary disk tumbler is aligned with the inner edge of the locking bar, and at least one of the partition plates for holding the slot for storing the rotary disk tumbler, the keyhole opening edge on the locking bar side It was raised, than Te, this to be written flat thin line difference in the gap between the partition plate and the rotary disc tumbler lock of the rotary disc tumbler lock Characterized in that so as to prevent.

According to a fourth aspect of the present invention, an outer cylinder in which a cam groove is formed along a generatrix of the inner peripheral surface, and the outer cylinder is rotatably fitted to the outer cylinder and stacked in the central axis direction through a gap. A plurality of partition plates are provided, and an inner cylinder that penetrates the key hole along the central axis, and extends along a generatrix of the inner cylinder, and is guided so as to be movable in the radial direction at the outer periphery of the inner cylinder. And a locking bar urged in a direction in which an outer edge engaged with the cam groove protrudes outward, and each slot between the partition plates has a size that can surround the key hole in the center portion. An annular rotary disk tumbler with a key insertion hole is inserted, and one of its substantial parts is pivotally supported on a pivot that penetrates the inner cylinder in the axial direction, and the outer edge of the free end An unlocking notch is formed in the opening of the key insertion hole, while the movement trajectory of the tip is inserted into the key hole. Engagement projections that interfere with the flat portion or edge of the key lock blade are integrally projected, and each rotary disk tumbler is urged in the direction in which the engagement projection approaches the key lock, and in the normal state, the inner cylinder Each of the rotary projections of the tumbler group is engaged with a corresponding recess formed on the key blade inserted through the key hole. The unlocking notch of the disc tumbler is aligned with the inner edge of the locking bar, and at least one of the partition plates holding the slot for storing the rotary disc tumbler, between the keyhole and the unlocking notch to form a recessed portion extending in the width direction of the keyhole, following Te, a flat in a gap between the partition plate and the rotary disc tumbler lock of the rotary disc tumbler lock Line is characterized in that so as to prevent that the plugged.

  The cylinder lock according to the present invention configured as described above is inserted into a thin thin wire from the keyhole, and the thin wire is inserted into the free end side of the tumbler from the gap between the partition plate and the lever tumbler, and the angle of the unlocking notch Since the movement of the thin and thin wire of the key duplicating tool described in Patent Document 1 for searching for the position is completely sealed, duplication of the key by a malicious third party can be completely prevented, and the safety of the cylinder lock Can be significantly increased.

  It is possible to completely prevent duplication of the key by thin and thin wires by raising a part of the keyhole opening edge of the partition plate or by forming a recess between the keyhole and the unlocking notch. It can also be implemented easily.

  In FIG. 4, reference numeral 3 denotes the partition plate. The opening edge of the key hole 4 opened in the center of the partition plate 3 (the portion near the key hole 4 on the surface of the partition plate 3), that is, FIG. On the lower side, the right hatched portion that does not interfere with the lever tumbler 11 is raised, for example, 0.2 mm (粍) to 0.5 mm, and forms a raised portion 19.

  Since the lever tumbler 11 shown in FIG. 4 is locked to the backup pin 8 and cannot rotate counterclockwise from the illustrated angular position, the raised portion 19 of FIG. 4 does not interfere with the lever tumbler 11.

  On the other hand, when the raised portion 19 is extended leftward in FIG. 4 so as to interfere with the lever tumbler 11, the lever tumbler 11 and the raised portion 19 are twisted and the lever tumbler does not rotate, and therefore the lever tumbler lock does not operate. .

  Further, when another lever tumbler is inserted in the slot on the back side of the lever tumbler 11 shown in FIG. 4, that is, on the side facing the partition plate 3, The opening may be inserted in the same direction with the opening facing to the right.

  In the former case, if the raised portion 19 shown in FIG. 4 is formed in plane symmetry with respect to the partition plate 3, the raised portion 19 and the other lever tumbler interfere with each other and twist, so that the raised portion is symmetrical with respect to the central axis of the inner cylinder. Forming part.

  On the other hand, in the latter case, the raised portions 19 shown in FIG. 4 are formed symmetrically with respect to the partition plate 3.

  In order to form the raised portion 19, for example, both surfaces of the partition plate 3 are ground by 0.2 to 0.5 mm leaving the raised portion 19, or a thin plate having the shape of the raised portion 19 is bonded to the partition plate 3 with an adhesive. Although means such as sticking are possible, it is more practical to form by pressing or plastic working by forging.

  In the cylinder lock according to claim 1 configured as described above, as shown in FIGS. 4 and 5, a thin pipe 21 whose tip is bent in an L shape is inserted into the key hole, and a thin thin wire is passed through the pipe 21. Even if the pipe 21 is turned and then the thin wire is inserted into the gap between the tumbler and the divider plate, the raised portion 19 blocks the gap. I can't find the position.

  In addition, it is not necessary to form the above-mentioned protruding part 19 in all the partition plates. This is because the key cannot be completed if even one angular position of the unlocking notch 9 is unknown.

  FIG. 6 shows a cylinder lock according to the second aspect of the present invention. In this cylinder lock, the partition plate 3 between the key hole 4 and the unlocking cutout of the tumbler has a width direction of the key hole (in the key hole). A recessed portion 22 extending in the width direction of the inserted key is formed.

  In FIG. 6, the recessed portion is shown by hatching, and its length, that is, the dimension in the left-right direction in FIG.

  Further, it is desirable that the depth of the recessed portion 22 is, for example, about 0.2 to 0.5 mm, similar to the raised portion.

  Furthermore, if this recessed part 22 is required, it will also form in the back side of the partition plate 3. FIG.

  In the cylinder lock according to the second aspect of the present invention configured as described above, when the fine wire is drawn out from the pipe 21, the fine wire is drawn out while being urged toward the partition plate 3, so that the tip is surely recessed. Since it does not escape from the recessed part 22 after that, it cannot search for the unlocking notch of a tumbler.

  Although this is not an essential configuration of the present invention, it is desirable that the cross-sectional shape of the intersecting portion between the inner wall surface and the bottom surface of the recessed portion is not round and sharp. This is because the tip of the thin wire can be prevented from slipping out of the recessed portion 22.

  In the rotary disk tumbler lock shown in FIG. 3, as shown by a chain line, a raised portion 19 is formed at the opening edge on the locking bar side of the key hole 4.

  For example, the shape of the upper side of the raised portion 19 is a rectangular waveform like the opening edge of the keyhole 4 shown in FIG. 3, and the lower side is horizontal.

  The protruding amount of the protruding portion is, for example, 0.2 to 0.5 mm as in the first aspect of the invention, and if necessary, the protruding portion is formed symmetrically on the back side of the partition plate.

  In this case, the key insertion hole 13 has a shape surrounding the key hole 4, and the rotary disc tumbler 14 does not interfere with the opening edge of the key hole on the locking bar side, so the width direction of the key hole of the raised portion formed at the opening edge The dimensions of are less limited compared to lever tumbler tablets.

  In the cylinder lock according to the third aspect of the present invention configured as described above, as described above, even if an attempt is made to insert a thin line into the gap between the tumbler and the partition plate, the raised portion blocks the gap. So I can't find the location of the unlocking notch after all.

  In the rotary disc tumbler lock shown in FIG. 3, it extends in the width direction of the key hole (the width direction of the combined key inserted into the key hole) at the part of the partition plate 3 between the key hole 4 and the unlocking notch 9 of the tumbler. A recess 22 is formed (not shown).

  The shape or depth of the recessed portion is the same as that of the recessed portion 22 in the invention described in claim 2.

  Since the effect of the invention according to claim 4 is the same as that of the invention according to claim 2, further detailed description is omitted.

The longitudinal cross-sectional view of a lever tumbler lock. The cross-sectional view of a lever tumbler lock. A cross-sectional view of a rotary disc tumbler tablet. The cross-sectional view of the lever tumbler lock which shows the principal part of invention of Claim 1. It is a diagram which shows a part of the longitudinal cross section, and a raised part is abbreviate | omitted and shown for clarification of drawing. The cross-sectional view of the lever tumbler lock which shows the principal part of invention of Claim 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cam groove 2 Outer cylinder 3 Partition plate 4 Key hole 5 Inner cylinder 6 Locking bar 7 Slot 8 Backup pin 9 Unlocking notch 11 Lever tumbler 12 Support shaft 13 Key insertion hole 14 Rotary disk tumbler 15 Joint key 16 Engagement protrusion 17 Depression 19 Raised part 22 Recessed part

Claims (6)

An outer cylinder in which a cam groove is formed along the generatrix of the inner peripheral surface, an inner cylinder that is rotatably fitted to the outer cylinder and penetrates the key hole along the central axis, and along the generatrix of the inner cylinder A locking bar that is guided in a radially movable manner at the outer peripheral portion of the inner cylinder and that is biased in a direction in which an outer edge engaged with the cam groove protrudes outwardly, Each of the inner cylinders is substantially C-shaped, and is pivotally supported with one end pivotably supported by a support shaft. The inner cylinder is urged in a direction that interferes with the side edge of the key combination inserted into the key hole. In a normal state, a plurality of lever tumblers that are locked by a backup pin that penetrates the inner cylinder in the axial direction and that has an unlocking notch for receiving the inner edge of the locking bar at the outer edge of the free end are arranged along the key hole. Each of these tumbler groups engaged with the corresponding keyway of the key inserted through the keyhole The unlocking notch of each lever tumbler is aligned with the inner edge of the locking bar, and the keyhole opening on the locking bar side is provided on at least one of the partition plates for holding the slot for storing the lever tumbler. Cylinder lock characterized in that a portion that does not interfere with the lever tumbler at the edge is raised so that a flat thin line is prevented from being inserted into the gap between the partition plate of the lever tumbler lock and the lever tumbler. . An outer cylinder in which a cam groove is formed along the generatrix of the inner peripheral surface, an inner cylinder that is rotatably fitted to the outer cylinder and penetrates the key hole along the central axis, and along the generatrix of the inner cylinder A locking bar that is guided in a radially movable manner at the outer peripheral portion of the inner cylinder and that is biased in a direction in which an outer edge engaged with the cam groove protrudes outwardly, Each of the inner cylinders is substantially C-shaped, and is pivotally supported with one end pivotably supported by a support shaft. The inner cylinder is urged in a direction that interferes with the side edge of the key combination inserted into the key hole. In a normal state, a plurality of lever tumblers that are locked by a backup pin that penetrates the inner cylinder in the axial direction and that has an unlocking notch for receiving the inner edge of the locking bar at the outer edge of the free end are arranged along the key hole. Each of these tumbler groups engaged with the corresponding keyway of the key inserted through the keyhole The unlocking notch of each lever tumbler is aligned with the inner edge of the locking bar, and at least one of the partition plates holding the slot in which the lever tumbler is accommodated, the key hole and the unlocking notch A concave portion extending in the width direction of the keyhole is formed between the two, so that a flat thin wire is prevented from being inserted into the gap between the lever tumbler lock partition plate and the lever tumbler . A cylinder lock characterized by that. An outer cylinder formed with a cam groove along the generatrix of the inner peripheral surface, and a plurality of partition plates that are rotatably fitted to the outer cylinder and stacked in the central axis direction through a gap are provided. And an outer edge that extends along the generatrix of the inner cylinder and is guided so as to be movable in the radial direction at the outer peripheral portion of the inner cylinder and engages with the cam groove An annular rotary disk tumbler having a locking bar biased in the outward projecting direction and having a slot for inserting a key hole in the center of each slot between the partition plates. Is inserted, and one portion of the substantial part is pivotally supported on a support shaft penetrating the inner cylinder in the axial direction, and an unlocking notch is formed on the outer edge of the free end, The flat part of the blade of the key that the movement trajectory of the tip is inserted into the key hole at the opening edge of the insertion hole Is a backup pin that integrally protrudes an engaging projection that interferes with the edge, and urges each rotary disk tumbler in a direction in which the engaging projection approaches the key, and normally penetrates the inner cylinder in the axial direction. On the other hand, when each of the engaging protrusions of these tumbler groups engages with a corresponding recess formed in the keying blade inserted through the key hole, the unlocking notch of each rotary disk tumbler is locked. be one which is adapted to match the inner edge of the bar, at least one partition plate for maintaining a slot rotary disc tumbler is accommodated, it is raised a keyhole opening edge of the locking bar side, than Te, a rotary disk and wherein the flat thin lines in the gap between the partition plate and the rotary disc tumbler tumbler is to prevent that the plugged A cylinder lock that. An outer cylinder formed with a cam groove along the generatrix of the inner peripheral surface, and a plurality of partition plates that are rotatably fitted to the outer cylinder and stacked in the central axis direction through a gap are provided. And an outer edge that extends along the generatrix of the inner cylinder and is guided so as to be movable in the radial direction at the outer peripheral portion of the inner cylinder and engages with the cam groove An annular rotary disk tumbler having a locking bar biased in the outward projecting direction and having a slot for inserting a key hole in the center of each slot between the partition plates. Is inserted, and one portion of the substantial part is pivotally supported on a support shaft penetrating the inner cylinder in the axial direction, and an unlocking notch is formed on the outer edge of the free end, The flat part of the blade of the key that the movement trajectory of the tip is inserted into the key hole at the opening edge of the insertion hole Is a backup pin that integrally protrudes an engaging projection that interferes with the edge, and urges each rotary disk tumbler in a direction in which the engaging projection approaches the key, and normally penetrates the inner cylinder in the axial direction. On the other hand, when each of the engaging protrusions of these tumbler groups engages with a corresponding recess formed in the keying blade inserted through the key hole, the unlocking notch of each rotary disk tumbler is locked. In the width direction of the key hole between the key hole and the unlocking notch in at least one partition plate that holds the slot in which the rotary disk tumbler is accommodated. forming a extending recess, to prevent the following Te is plugged is flat thin wire into the gap between the partition plate and the rotary disc tumbler lock of the rotary disc tumbler lock Cylinder lock, characterized in that had Unishi.   The cylinder lock according to claim 1 or 3, wherein a protruding amount of the keyhole opening edge is 0.2 to 0.5 mm.   The cylinder lock according to claim 2 or 4, wherein a depth of the recessed portion is 0.2 to 0.5 mm.

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