KR920006177B1 - Structure of key cylinder used for lock - Google Patents

Abstract

A key cylinder sturcture of a lock includes a round cylinder, with a concave part, a projection and a step on its inner wall, to be inserted in a housing. The round cylinder includes a key cylinder inserted in a disc unit comprising a locking bar and a series of spacer discs in shapes of sectors and locking discs with locking grooves and steps, between first and second supporting discs. The locking bar is mounted on both supporting discs in grooves by springs across the disc unit. A dial unit with an unlocking hook is mounted on the housing outside the first supporting disc.

Description

Structure of lock key cylinder

1 is an exploded perspective view of the present invention,

FIG. 2 is an exploded perspective view showing a coupling relationship between the key cylinder body and the locking disk and the housing shown in FIG. 1;

3 is a cross-sectional view of the overall assembly of FIG.

4 (a) and (b) are left and right side perspective views of the release disk of the present invention;

5 (a) is a cross-sectional view showing a state in which the key is inserted to release the lock of the present invention,

(b) is a cross-sectional view showing a first step of releasing the lock of the present invention,

(c) is a cross-sectional view showing two steps of releasing the lock of the present invention.

(d) is a cross-sectional view showing a state in which the release operation of the lock of the present invention is completed;

6 (a) to (h) are front views showing various embodiments of the locking groove of the locking disk of the present invention.

* Explanation of symbols for the main parts of the drawings

1: key cylinder 2: housing

3: cylindrical cylinder 3a: recessed portion

3b: protrusion 3c: locking portion

3d: Stopping protrusion 3e: Groove

3f: recess 4: disk unit

5: dial device 6: key cylinder

6a: Keyway, 7, 8 1st, 2nd support disk

7a, 8a: groove portion 9: stopper member

10: locking bar 11: spring

12: locking groove 12a: first locking groove

12b: 2nd locking groove 13: Hanging groove

13a: recess 13b: staircase

13c: curved portion 14: locking disc

15 spacer disc 16 bushing

17: Dial knob 18: Disc

19: spacer 20: pivot pin

21: Release hook 22: Release disc

22 ': pin 22a: recess

23 disc portion 23a: jammed recess

24: disk portion 24a: opening portion

24b: recessed portion 24c: curved portion

24d: protrusion 25: C-ring

The present invention relates to a structure of a lock key cylinder, and more particularly to a structure of a lock key cylinder that prevents a malfunction as well as prevents a malfunction of the lock by being released in two stages.

In general, the lock has a cylindrical lock in which a plurality of locking pins are arranged in the cylindrical shell, and the key is inserted into the key groove so that the lock pin is released while the lock pin is aligned according to a pattern formed in the key. A plurality of locking discs, each having a locking groove formed at a predetermined position on the circumferential surface thereof, are arranged and arranged so that when the locking grooves are aligned with each other by turning a dial, the locking hooks are removed and the lock is released. There is a dial lock.

However, when the cylindrical lock is inserted into a similar key or a pin with a pin in a key groove, the lock may be released when the lock is properly operated, thereby preventing the function of the lock sufficiently. In order to produce components, high precision is required, such as extremely small tolerances, and it is difficult to produce them. In addition, the reliability of the lock function is limited in structure, and in the case of dial locks, special safes such as safes are used. Except for locks, there is a drawback that they are extremely limited in use due to their troublesome use.

Therefore, the present invention was invented to solve the above-mentioned shortcomings, and the lock release operation is made in two steps, in step 1, after checking whether the key is a true key or a similar key, and in step 1, the key is If it is correct, the similarity of the key is checked again in step 2, and the lock is released only when it is a true key.If the key is used and passed through step 1, it is easily released and the key is extracted. Its purpose is to provide a structure of a lockable key cylinder.

The present invention for achieving the above object is a cylindrical cylinder which is inserted into the housing while being formed in the inner circumferential surface and the concave portion and the height h of the protrusion and the locking portion of the height 2h in order to extend in the circumferential direction; The first and second supporting disks, which are disc-shaped, having recesses formed at predetermined circumferential positions on a key cylinder in which the key grooves are penetrated in the longitudinal direction while being fitted inside the housing, are fixedly fixed at regular intervals. A disk unit in which a locking bar having a predetermined length is elastically inserted into the groove portion, and the second support disk is coupled to the cylindrical cylinder via a stopper member; A spacer having a ring portion and a fan-shaped portion is formed in the key cylinder between the first and second support disks, and a locking groove having a h or 2h circumferentially positioned at a predetermined position is formed in the key cylinder, and a locking groove is formed at the center to correspond to the key pattern. A plurality of locking discs sandwiched at predetermined intervals through the disc; A release disk having a release curved portion formed at a circumferential predetermined portion in a bushing of a large diameter outside the first support disk, and a release hook for releasing a lock engaged with a similar key by operating the release disk, is detachably installed. It is composed of a known dial device composed of a plurality of disks.

According to the present invention configured as described above, when the key cylinder is rotated by inserting the key into the key groove, the locking bar is elastically installed in the recesses of the first and second support disks together with the locking disks selected and caught corresponding to the pattern of the keys. Is rotated in close contact with the inner surface of the cylindrical cylinder and is caught by the protrusion of the key cylinder. At this time, the locking bar is pushed to the protrusion of the cylindrical cylinder and lowered to a predetermined height (h) into the locking groove of the locking disc. Since the protrusion is carried over the protrusion, the first stage of the releasing operation of rotating the key cylinder at a predetermined angle is performed.

If the key is the same key as the pattern but the height of the pattern projection is different or the thickness of the pattern projection is a thin key, if the similar key is inserted into the key groove to rotate the key cylinder, the similar key is In the locking groove of the locking disc, the locking groove rotates by the thickness difference with the true key and rotates together with the first and second supporting discs and the lock cam. That is, when the locking disc rotates laterally with a slight phase difference, the locking groove is not arranged in a straight line when the locking bar is caught by the protrusion, so that the locking bar fitted to the upper groove of the first and second supporting discs is cylindrical. Even though the locking protrusions of the locking discs are pressed against the cylinder protrusions, the locking bars of the locking discs are arranged to be offset from each other. . Therefore, the lock of the present invention has a function of checking whether the key used in the first step of the release operation is a pseudo key.

On the other hand, even if the first release operation is performed as described above, the lock is not completely released, and thus the second release operation is continued. That is, since the locking bar passes the protrusion of the cylindrical cylinder, the key cylinder continues to rotate. 2, the supporting disk and the locking disk and the locking bar arranged therebetween is rotated in close contact with the inner surface of the cylindrical cylinder, and the upper surface of the locking bar is caught by the locking portion formed at the height of 2h in the cylindrical cylinder. If the locking key is the locking bar is pressed by the locking portion of the cylindrical cylinder, the locking bar is pushed by the locking portion of the cylindrical cylinder, and then reinserted into the recesses of the first and second supporting disks and the locking groove of the locking disk. As the key cylinder rotates completely, the lock is released.

By the way, even if the above-mentioned lock release operation step 1 is performed by the pseudo key, the present invention can check the lock again in the release operation step 2 to prevent the release of the lock, that is, the first and second bearings. The disk and the locking disk and the locking bar sandwiched therebetween pass through the projections of the cylindrical cylinder, and are rotated further after the first stage of the releasing operation, so that the upper surface of the locking bar is pressed while contacting the catch of the cylindrical cylinder. . At this time, the locking grooves of the plurality of locking discs rotated by the pattern of the pseudo key have a depth of h or 2h, and the locking bar is pressed down by the cylindrical cylinder locking part in the second step of the release operation (h _1). ), I.e., the height 2h of the locking portion is greater than the height h ₂ of the locking bar being pressed down by the cylindrical cylinder protrusion in step 1, that is, the height h of the protrusion (h ₁ = 2h ₂ ). Therefore, even if the first step of the release operation is performed as the pseudo key as described above, if the locking disc that does not match the true key is selected, the locking bar can be lowered further because the depth of the locking groove of the locking disc is h. There is no lock on the cylinder cylinder with the height of 2h, so that it cannot be rotated.

However, in this state, if the key cylinder is rotated in the opposite direction to extract the pseudo key from the key groove, the first and second bearing discs and the locking disc and the locking bar arranged between them are in close contact with the inner surface of the cylindrical cylinder and in the opposite direction. The locking bar, which is elastically installed while rotating, is hung on the wall of the cylindrical cylinder protrusion and can no longer rotate, so the key cannot be removed until the lock is broken.

Therefore, in the present invention, the dial knob of the dial device is set so that the release huck of the dial device is caught in the recess of the release disk by operating the dial device mounted on the bushing of the large diameter outside the first support disk. When rotating, the release disk is rotated at an angle with the release hook, and the release curved portion of the release disc is positioned to overlap with the concave portion on the vertical wall portion of the protrusion of the cylindrical cylinder. Therefore, when the key cylinder is rotated in the opposite direction, the locking bar is smoothly rotated in the opposite direction on the release curved portion of the release disk, so that the key can be extracted from the key cylinder.

Thus, the present invention can be easily released when the key is not pulled from the key cylinder according to the malfunction can be reused without damaging the magnet.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The key cylinder (1) of the present invention is mounted inside the lock (not shown), and as the key cylinder (1) is operated, the operation plate (1a) releases the lock of the lock and releases the lock. As shown in FIG. 1 and FIG. 2, the cylindrical cylinder 3 is fixed in the lock body and inserted into the housing 2 having the dial number plate 2a engraved on one end thereof to be fixed by the fixing pin 2b. The disk unit 4 inserted into this cylindrical cylinder 3 and the well-known dial device 5 connected to one side of this disk unit 4 are comprised.

Here, the cylindrical cylinder 3 is provided with an inclined portion 3a ₁ tapered at one end on its inner circumferential surface as shown in FIG. 5, and a concave portion 3a which is concave by a predetermined length in the circumferential direction. ), and gradually formed into an inclined curved portion (3b ₁₎ and can be about twice the height (h ₂₎ of the vertical wall portion (3b _2), the protrusion (3b), the protrusion (3b), the height (h ₁₎ with the engagement portion (3c) and a stop projection (3d) formed on the lower left inner surface with respect to the vertical center line of the cylindrical cylinder (3) is formed by extending about 2/3 of the total length of the cylindrical cylinder (3), and the cylindrical cylinder ( On the other inner circumferential surface of 3), a groove portion 3e to which the spacer disk described later is inserted and supported is formed over the entire length of the cylindrical cylinder 3, while being formed between the protrusion 3b and the locking portion 3c. the wall thickness of the recess (3f) is between that of the height h ₂ of height h ₁ and the engaging portion (3c) of these projections (3b) The through-hole 3g of a predetermined dimension is formed in the lower part of the rear end side of the said cylindrical cylinder 3. As shown in FIG.

The disc unit 4 is provided with a key cylinder 6 having a key groove 6a formed in the center thereof in a longitudinal direction thereof, and the key cylinder 6 has a recess 7a, at a predetermined circumferential position thereof. The disk-shaped first and second support disks 7 and 8 having 8a) are fixedly installed at a predetermined interval, and the second support disk 8 has an inner hole 8b formed through the radial direction and the cylindrical cylinder. The stopper member 9 is configured to prevent the second support disk 8 from being arbitrarily rotated through the hole 3g of (3). The first locking pin 9a and the second locking pin 9b are spring-loaded. When the key is inserted into the key groove 6a of the key cylinder 6 by the configuration of elasticity of 9c, it is pushed down by the first locking pin 9a by the pattern of the key and then lowered. The locking pins 9a and 9b are aligned in line with the interface between the second support disk 8 and the cylindrical cylinder 3, and in this state the key cylinder Rotating (6) causes the second support disk (8) to be rotated, while releasing the lock state and withdrawing the key from the key groove (6a), the first and second locking pins (9a, 9b). The second locking pin 9b is placed in a state of being blocked by the interface between the cylindrical cylinder 3 and the second support disk 8 as shown in FIG. 3 while being raised by the elastic force of the spring 9c. The second support disk 8 is prevented from rotating arbitrarily. On the other hand, the locking bar 10 of a predetermined length having a quadrangular cross section in the recessed portions 7a and 8a partially cut in one radial direction on the first and second support disks 7 and 8 is elastic with the spring 11. It is installed.

In addition, a plurality of locking grooves 12 having different depths in the radial direction are formed on the outer circumferential surface of the key cylinder 6 between the first and second bearing disks 7 and 8, respectively. In the center, a plurality of locking discs 14 each having a locking groove 13 formed so as to be caught by a pattern protrusion of a key, which will be described later, are arranged with spacers 15 interposed therebetween. Here, the spacer disk 15 has a fan-shaped fan portion 15b extending from the other side of the ring-shaped ring portion 15a as shown in FIGS. 1 and 6 (h). The outer edge of the fan-shaped portion 15b is fitted into the groove portion 3e formed in the longitudinal direction on the inner circumferential surface of the cylindrical cylinder 3 so as not to move, and the ring portion 15a is notched in the middle thereof. Is formed to have a suitable elasticity so that the ring portion 15a is elastically fitted on the key cylinder 6 so as to support the adjacent locking disks 14 with each other.

By the way, the locking groove 12 formed in the locking disc 14 is composed of two kinds of locking grooves 12a and 12b whose depths are h and 2h, as shown in FIG. 12 is the same dimension as the height of the engaging portion 3c of the cylindrical cylinder 3, the first locking groove 12a having a depth of h ₁ (= 2h), and the protrusion 3b of the cylindrical cylinder 3; ₂ ) the second locking groove 12b having a depth h of the same dimension as the height h ₁ to increase or decrease the number of the locking discs 14 or the first and second locking grooves 12a and 12b. By changing the position of each other or arbitrarily selecting and changing the arrangement state, the key pattern to be fitted into the locking grooves 12a and 12b can be provided in various kinds.

On the other hand, the dial device 5 has a configuration similar to a known dial device mounted on a cabinet or a safe, i.e., as shown in the first and third parts, the outer side of the first support disk 7. A plurality of disks 18 having grooves 18a formed on the circumference of the large diameter bushing 16 installed on the key cylinder 6 while being rotated in accordance with the rotation operation of the diaphragm 17 are arranged in the respective spacers ( 19, the knob 16b fitted to the key groove 16a of the bushing 16 is interposed, and the dial knob 17 is fitted to the groove portion 18a on the upper portion of the disk 18. The rotating hook 21 is elastically installed on the pivot pin 20 so as to rotate at a predetermined angle, while the release hook 21 is located outside the first support disk 7 below the release hook 21. A release disk 22 which is pushed and rotated by 21 is mounted.

Here, as shown in FIGS. 1 and 4, the release disk 22 has a recess 22a of a predetermined length formed on a top surface thereof, and is formed by a pin 22 'fixed to the cylindrical cylinder 3. The release disk 22 is able to rotate within a predetermined angle range. The release disk 22 is formed by overlapping two disks, and the rear disk portion 23 has a release hook (5) of the dial device 5. A locking recess 23a formed to be hooked by 21 is formed, and an opening 24a is formed in the front disk portion 24 over almost the entire surface. In addition, a recess 24b having a length shorter than the length of the recess 3a of the cylindrical cylinder 3 is formed in one of the openings 24a, and the recess 24b is provided with a protrusion 3b. A curved surface portion 24c inclined to the same dimension as the height h ₁ and the width is formed, and the other lower portion of the opening 24a is provided with a locking protrusion 24d that is caught by the locking bar 10. On the other hand, the C-ring 25 is inserted between the upper side of the release disk 22 and the cylindrical cylinder 3 so that a predetermined gap is formed between the release disk 22 and the first support disk 7. In this way, every release disk 22 to be released using a key is prevented from being in close contact with the first support disk 7 and always rotating.

Next, the effect of the present invention configured as described above will be described.

First, the operation of releasing the lock with the soothing key 26 will be described. When the key 25 is inserted into the key groove 6a of the key cylinder 6 and then rotated, the locking disc 14 on which the catching groove 13 is caught corresponding to the pattern of the key 26 is selected. Will rotate. At this time, the number of the locking discs 14 to be selected is equal to the number of the protrusions 26a forming the pattern of the key 26. That is, if this protrusion is one, one locking disc 14 is selected and the protrusions. Is two, two locking discs 14 are selected. For convenience of explanation, in the present embodiment, three locking discs having a shape as shown in sixth (a), (b), and (c) are shown. (14 ₁ , 14 ₂ , 14 ₃ ) is used, and the case where two locking discs 14 ₁ , 14 ₂ are selected and engaged and rotated as two projections 26a of the key pattern is described as an example. ·

The keying pattern is composed of two protrusions 26a spaced at predetermined intervals, and correspondingly, the first locking grooves 12a each having a groove depth h as shown in FIGS. 6A and 6C, respectively. Assuming that the first locking disc 14 ₁ and the second locking disc 14 ₃ are rotated by rotation, the key cylinder 6 is rotated by inserting the key 26 into the key groove 6a as described above. Locking bar 10 elastically installed through spring 11 on first and second support disks 7 and 8 and recesses 7a and 8a formed therein and the first and third locking disks 14 ₁ and 14 _3. ) it is rotated with the second locking disc with the second locking recess (12b a groove depth h): (14 ₂₎ is not rotated by being supported so hanging on the protrusion (26a) of the key patterns. In this case, the locking bar 10 rotates together with the first and second supporting disks 7 and 8 in a state in which the locking bar 10 is in close contact with the recess 3a formed on the inner circumferential surface of the cylindrical cylinder 3 by the elastic force of the spring 11. Then, as shown in FIG. 5 (b), the first locking groove 12a and the second locking disk 14 ₂ of the first and second locking disks 14 ₁ and 14 ₃ are caught by the protrusion 3b. The second locking grooves 12b are aligned side by side.

At this time, the height h ₁ of the protruding portion 3b is formed to be higher than the concave portion 3a by h, so that it is elastic to the upper recesses 7a and 8a of the first and second support disks 7 and 8. Pressing the installed locking bar 10 to a height of h, accordingly the locking bar 10 is lowered toward the center of the first, second support disks (7, 8) to correspond to the height of the protrusion (3b). The first locking groove 12a of the first and third locking discs 14 ₁ and 14 ₃ formed at a depth h and the second locking groove 12b of the stationary second locking disc 14 ₂ , Since the height corresponding to the height of the protrusion 13b, i.e., h, is absorbed, the locking bar 10 rides smoothly over the protrusion 3b, and the lock release step 1 is performed.

At this time, if the key 26 is a pseudo key having the same pattern as the genuine key and the thickness of the protrusion 26a of the key pattern is thin, the key cylinder 6 is used to rotate the key cylinder 6 using the pseudo key. (6a), the pattern of the similar key is loosely fitted in the locking groove 13 of the locking disc 14, slightly twisted by a predetermined angle, that is, the thickness difference of the key piston, and then the locking disc 14 is rotated. As a result, the locking disc 14 rotates together with the first and second support discs 7 and 8 and the locking bar 10 with a slight phase difference. Therefore, even if the locking bar 10 is pressed by the protrusion 3b, the locking bar 10 can be lowered further into the locking groove 12a because the locking discs 14 have a slight phase difference as described above. Even when the key cylinder is rotated, even if the locking bar 10 is caught by the protrusion 3b, the locking groove 12a of the locking discs 14 does not coincide in a straight line. (3b) is caught and does not rotate. Therefore, the first step of releasing the lock is not made and whether the key 26 is a true key is checked.

On the other hand, in the case of the soothing key 26, the locking bar 10 is to continue to rotate the key cylinder (6) even after the first step of the release operation over the protrusion (3b) of the cylindrical cylinder (3) the locking bar 10, the locking bar 10 is brought into close contact with the concave portion 3f formed at an intermediate height between the protrusion portion 3b having a height h and the locking portion 3c having a height 2h in the cylindrical cylinder 3. The lower end of the locking disk 14 is rotated while being slightly caught in the first or second locking grooves (12a, 12b) of the locking disk 14 is caught again by the locking portion (3c), in this case the locking portion (3c) Since the height h ₂ of the protrusion 3b is twice the height h ₂ , that is, 2h, the falling distance of the locking bar 10 pressed by the locking portion 3c should also be 2h.

Therefore, the first and the third locking disc (14 _1, 14 ₃₎ of claim 1, so the depth 2h of the locking groove (12a) the locking bar 10 the first and the third locking disc (14 _1, 14 ₃₎ Since the first locking groove 12a and the second locking groove 12b of the second locking disc 14 ₂ are accommodated in the inside, the height of the locking portion 3c is absorbed, so that the locking bar 10 is locked ( After smoothly riding 3c), the lock bar 10 is rotated and the lock bar 10 is in close contact with the inner surface of the cylinder cylinder 3 while the key cylinder 6 continues to rotate. One end of (10) pushes the locking projection 24d of the release disk 22 to rotate by a predetermined angle θ, and then rotates at an angle of about 180 ° from the initial position to unlock the lock. It is caught by the stopping projection 3d.

As the release disk 22 is rotated by a predetermined angle θ, the curved portion 24c of the release disk 22 overlaps the vertical wall portion 3b ₂ and the recess 3f of the protrusion 3b. When the lock cylinder 10 is rotated to the original position to release the key 26 from the key groove 6a of the key cylinder 6 after the lock is released, the locking bar 10 is projected. This is to allow the user to rotate on the curved portion 24c of the release disk 22 without being caught by the wall portion 3b ₂ of 3b), which will be described later.

On the other hand, even if the locking bar 10 overhangs the projection 3b of the cylindrical cylinder 3 even with a similar key, even if the first step of the releasing operation is performed, the locking part 10c again checks whether the key is a true key. do. In other words, if the key is a pseudo key, the selected locking disc 14 is different. For example, assuming that the fourth locking disc 14 ₄ shown in FIG. 6 (d) is selected and rotated, this fourth locking disc ( Since the depth of the first locking groove 12a of 14 ₄ ) is 2h, the depth of the first locking groove 12a of the fourth locking disk 14 ₄ is greater than the height 2h of the locking portion 3c. Even if the locking bar 10 is pressed down by the locking portion 3c, the locking bar 10 cannot be lowered. Therefore, it is no longer possible to rotate the key cylinder 6, so that the above two steps of the release operation are not made, so that it is possible to check whether the key is a true key once more.

In this case, if the key is similar to the above, the second operation of the release operation is not performed as described above. When the key is removed from the key groove 6a and the key cylinder 6 is rotated in the opposite direction, the locking bar 10 protrudes 3b. The key is not pulled out by being hooked on the vertical wall portion 3b ₂ ).

In this case, therefore, a well-known dial device 5 is used, that is, the dial knob 17 of the dial device 5 is rotated left and right to be released so as to be combined with the graduation plate 2a formed in the housing 2. When the numbers required for the operation are matched, the recessed hooks 21 elastically installed with springs (not shown) on the dial knob 17 while the recesses 18a of the disk 18 provided in the dial device 5 are aligned. Is caught by the locking recess 23a of the rear disc 23, when the dial knob 17 is rotated in the clockwise direction, the release hook 21 is pinned to the recess 22a formed at the upper end thereof. 22 ') is rotated by a predetermined angle until it takes.

In this manner, when the release disk 22 is rotated at a constant angle, the curved portion 24c formed on the rear disk 24 of the release disk 22 is a vertical wall portion of the protrusion 3b of the cylindrical cylinder 3 ( By overlapping the rear recess 3f of 3b ₂ ) and overlapping the wall portion 3b ₂ of the protrusion 3b with a gentle curved surface, the locking bar 10 smoothly crosses the curved portion 24c. The key cylinder 6 is rotated to its original position so that the key 26 can be pulled out of the key groove 6a, and the locking bar 10 stops at the engaging portion of the release disk 22. 24e). Accordingly, the unlocking disc 22 rotates the curved surface portion 24c superimposed on the concave portion of the projection 3b of the cylindrical cylinder to a predetermined angle θ and returns to the original position, and the locking bar 10 Since the slightly pressed in the inclined portion (3a ₁ ) of the recessed portion (3a) is fitted into the first locking groove 12a or the auxiliary groove 12c of the locking disk 14, the locking disk 14 Is arbitrarily rotated so that the alignment state of the first locking groove 12a is not disturbed.

On the other hand, the present invention can be variously modified bar, for example, by varying the shape of the locking groove 13 formed in the locking disk 14 may not be able to operate the key cylinder of the present invention by using a similar key. That is, as shown in FIG. 6 (e), if a recess 13a having a predetermined depth is formed on the upper and lower left and right sides of the locking groove 13 of the locking disc 14, the predetermined length is similar. If the pattern of the key is one of the same as the soothing key 25 and the other is almost similar to the pattern of the soothing key 26, but the height of the protrusion 26a of the pattern is low, the key groove 6a of the key cylinder 6 When the key cylinder 6 is rotated by inserting a similar key into the one key, the first locking disk 14 ₁ rotates at the same time as the rotation of the key cylinder 6, while the other fifth locking disk 14 ₅ is similar to the key. Since the height of the projection 26a is lower than the pattern of the soothing key 26, The quasi-key moves around by the length of the recess 13a and is caught by the step 13b of the recess 13a before it starts to rotate. Therefore, a phase difference is generated between these locking discs 14 ₁ and 14 ₅ so that the locking grooves 12a are not aligned in a straight line with each other, so that the locking bar 10 is not lowered even when the locking bar 10 is caught by the projection 3b. This prevents the lock from being released.

On the other hand, the above description, as opposed to the 6 (f) a sixth locking groove (13 ') of the locking disc (14, ₆₎ as shown in Fig bar which may be prevented similar key used by adjusting the width of its own, That is, the width of the locking groove 13 is made larger than the width of the locking groove 13 shown in FIGS. 6 (a) to 6d to increase the width of the locking groove 13 'from the third locking groove 12c. If the first locking groove (12a) is formed in the position moved to the right by the right, even if the key is inserted 26, the key 26 rotates the locking disk (14 ₆ ) with a slight difference after the phase difference, locking When the bar 10 is caught by the protrusion 3b, the selected first and second locking grooves 12a and 12b of the selected first and sixth locking disks 14 ₁ and 14 ₆ are aligned in a straight line, thereby causing the locking groove ( Even when a pseudo key suitable for the width of 13 ') is used, the unlocking of the lock can be prevented.

In addition, as another modified example of the engaging groove 13, as shown in FIG. 6 (g), a curved surface 13c having a gentle inclination may be formed into a curved portion 13c. Since it is the same as the operation of the part and the step (13a, 13b), description thereof will be omitted.

As described above, according to the present invention, the cylindrical cylinder 3 is formed with a projection 3b and a locking portion 3c having heights h ₁ and h ₂ (h ₂ = 2h ₁ ), respectively, and the locking disc 14 In addition, two types of first and second locking grooves 12a and 12b having corresponding depths h ₁ and h ₂ are formed, so that recesses 7a and 8a of the first and second support disks 7 and 8 are formed. When the locking bar 10 is elastically installed in the rotation bar while being in close contact with the inner circumferential surface of the cylindrical cylinder 3 and the height h ₁ is caught by the protrusion 3b, the key 26 is a key. Only when the locking bar 10 is accommodated into the first locking groove 12a, the key cylinder 6 can be rotated so as to check whether or not the key is a true key and release the first step. If the locking bar 10 is caught by the locking portion 3c having the height h ₂ in the second step of releasing operation, the lock is also provided only when the key 26 is a true key. As the king bar 10 is housed in the first locking groove 12a, the key cylinder 6 can be rotated to check whether the key is a true key and thus resemble the key 26 in two steps. You can check whether or not the lock is released randomly.

In addition, if the key cylinder 6 is rotated in the opposite direction due to a misalignment key or a hook or the like, or if the locking cylinder 10 is rotated in the opposite direction due to a malfunction, the dial device ( By operating 5) by simply releasing it with the release hook 21 and the release disk 22, there is a general-purpose effect such that it can be reused without breaking the lock.

Claims (5)

Cylindrical cylinder 3 and so that the recess 3a, the protrusion 3b, and the latching portion 3c extend in the circumferential direction on the inner circumferential surface so as to fit in the housing 2 and fit inside the cylindrical cylinder 3, The first and second support disks 7 and 8 having the recesses 7a and 8a formed at predetermined circumferential positions on the key cylinder 6 through which the key groove 6a is formed to penetrate in the longitudinal direction are fixedly installed at regular intervals. The second support disks 7 and 8 are fixedly installed at a predetermined interval, and the stopper member 9 is provided on the second support disk 8 and the first and second support disks 7 and 8 are provided. A disk unit 4 in which the locking bar 10 is elastically installed through the springs 11 in the recesses 7a and 8a of 8); Locking grooves 12 having different depths at predetermined circumferential positions while being inserted at predetermined intervals between the first and second bearing disks 7 and 8 of the disk unit 4 by means of a fan-shaped spacer disk 15. And a plurality of locking discs 14 having a locking groove 13 formed to be caught in the center and corresponding to the protrusions 26a of the key 26 pattern; A structure of a lock key cylinder composed of a dial device 5 equipped with a release hook 21 for operating the release disk 22 while being mounted on the outer large diameter bushing 16 of the first support disk 7, The locking groove 12 of the locking disk 14 is formed to a depth corresponding to the height (h, h ₂ ) of the projection (3b) and the locking portion (3c) of the cylindrical cylinder (3), respectively. Structure of a lock key cylinder, characterized in that consisting of the first, second locking grooves (12a, 12b). The lock key cylinder structure according to claim 1, wherein the locking groove (13) of the locking disc (14) is connected to the recess (13a) and the step (13b). The lock key cylinder structure of claim 1, wherein the locking groove (13) of the locking disc (14) is formed of a curved surface portion (13c) having a gentle inclination. The release disk (22) of the dial device (5) is composed of two front and rear disks (23, 24), of which the front disk (23) is caught so that the release hook (21) is caught. A recess 23a is formed, and the opening 24a formed in the rear disk 24 corresponds to the recess 24b and the protrusion 3b having a length shorter than the recess 3a of the cylindrical cylinder 3. Locks, characterized in that the lower locking projections 24d and the upper locking projections 24e are formed at the lower portion of the opening 24a so as to be caught by the curved portion 24 and the locking bar 10 formed at the position respectively. The structure of the key cylinder.

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