JPH07324531A - Variable code type cylinder lock - Google Patents

Abstract

PURPOSE:To prevent any drop in the strength of a key and its malfunction form occurrding by defining at least and endmost projection among plural pieces of key code projections installed in the key as a complete insertion checking code, while installing a checking tumbler. CONSTITUTION:A complete insertion checking projection 78 is installed in at least an endmost projection among plural pieces of key code projections 49 installed in a key K. On the other hand, a complete insertion checking tumbler is installed in a plug 36. When a key K is inserted into a key hole, the tumbler pushed by the key code projection installed in the key moves in direction of making the plug 36 rotatable. The complete insertion checking tumbler also moves in direction of making the plug rotatable after being pushed by the checking projection 78 at a time when the key is completely inserted. With this constitution, a key code conversion is made so as to be performable without fail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable code type cylinder lock capable of changing a key code of a cylinder lock and returning to an old code by operating a variable key in an incompletely inserted state. The present invention relates to a variable code type cylinder lock that prevents the risk of being converted into a code.

[0002]

2. Description of the Related Art A door is locked and unlocked by a simple operation of inserting a key into a keyhole of a cylinder lock fixed to a door and rotating the door. It is convenient because it can be prevented from being unlocked, and it is used in a wide range of fields including doors for vending machines and doors for rockers. However, if there is a risk of losing the key or creating a duplicate key, it is necessary to replace the cylinder lock with a different code.

It is expensive to prepare a large number of cylinder locks having different codes, and there is a problem that the work of replacing the cylinder locks is troublesome and time-consuming. In such a case, therefore, the variable code whose key code can be easily changed. It is better to use a type cylinder lock. Among the variable code type cylinder locks, those that cannot return the key code to the old code and those that can freely return the code by the reset mechanism (JP-A-5-2722).
No. 63, Japanese Patent Laid-Open No. 3-234275), and the one that can restore the old code has an advantage that the code can be changed many times.

FIG. 18 is a vertical cross-sectional view showing a conventional example of a variable code type cylinder lock capable of returning to an old code. The inner circumference of the front end portion (the left end portion in FIG. 18) of a case 1 formed in a tubular shape. An annular peripheral wall 2 is provided on the surface, and a mounting flange 3 is provided on the outer peripheral surface of the rear end portion of the case 1. A plurality of driver pin holes 4 penetrating from the inner peripheral surface of the case 1 to the outer peripheral surface of the case 1 are arranged at two upper and lower sides of the case 1 so as to be arranged in the axial direction of the case 1. A cover 5 that covers each driver pin hole 4 is provided.

A spring 6 and a driver pin 7 are inserted into each driver pin hole 4, and an operation pin hole 8 is provided behind the row of driver pin holes 4 on the upper side. The operation pin hole 8 serves as an operation portion. The operation pin 9 is inserted. An end cover 11 is fitted in a shallow recess 10 provided on the rear end surface of the case 1, and a long hole 12 provided in the end cover 11 is operated with a reset button 13 that comes into contact with an operation pin 9. The part 13a is inserted.

The intermediate cylinder 14 as a joint cam, which is rotatably inserted into the inner peripheral surface of the case 1, has a rear wall 1.
5, a tubular portion 16 extending forward and a shaft portion 17 extending rearward from the rear wall 15 and having a locking cam (not shown) attached thereto are provided. In the tubular portion 16, auxiliary pin holes 18 that can respectively communicate with the driver pin holes 4 in the upper and lower two rows,
A reset pin engagement hole 19 is provided as a reset pin engagement portion that can communicate with the operation pin hole 8. In FIG. 18, the auxiliary pin hole 18 on the upper side is inserted with the auxiliary pin 20 having a thickness substantially similar to the thickness of the tubular portion 16, and the auxiliary pin holes 18 on the lower side are inserted with a plurality of variable pins 21. To be done.

The plug 22 rotatably inserted into the tubular portion 16 can communicate with the key hole 23 opened on the front surface and one auxiliary pin hole 18 (on the upper side in FIG. 18) from the key hole 23. A tumbler pin hole 24 and a reset pin insertion hole 25 with a bottom that can communicate with the reset pin engagement hole 19 are provided, and a tumbler pin 26 is inserted into the tumbler pin hole 24 to reset the reset pin engagement hole 19 and the reset pin insertion hole 25.
Includes a first reset pin 27, a second reset pin 28,
The spring 29 is inserted.

A variable code type silicone configured as described above
In the rear lock, the inner peripheral surface of the case 1 and the cylinder of the intermediate cylinder 14
The first shear line L is formed between the outer peripheral surface of the portion 16 and₁But
The inner peripheral surface of the cylindrical portion 16 and the outer peripheral surface of the plug 22.
Between the second shear line L ₂Is formed. In FIG.
As shown, when the initial setting key K is inserted,
Shearline L₁Nothing engages with the second chassis
Line L₂The second reset pin 28 is engaged with
Therefore, press the initial setting key K
The binder 14 can be rotated.

When the operating button 9 is pressed by the reset button 13, the operating pin 9 engages with the _first shear line L ₁ and the end face of the second reset pin 28 overlaps with the second shear line L ₂ , so that the initial stage When the setting key K is rotated 180 degrees, only the plug 22 is rotated 180 degrees while the intermediate cylinder 14 remains fixed.

[0010] Next, the plug 36 when inserting the primary variable setting key K ₁ is pulled out the initialization key K is rotatable, the plug 22 by the primary variably set key K ₁ 1
When it is rotated 80 degrees and the reset button 13 is released, as shown in FIG.
As shown in 0, the variable pin 21 is inserted between the tumbler pin 26 and the auxiliary pin 20, and the code of the variable code type cylinder lock is aligned with the primary variable setting key K ₁ . By performing the same operation, it is possible to match with another variable setting key or to return to the old code.

In the variable code type cylinder lock capable of returning to the old code, the key code protrusion of the primary variable setting key K ₁ pushes the tumbler pin 26 even when the primary variable setting key K ₁ is incompletely inserted. In this case, the end surface of the variable cord pin 21 and the end surface of the tumbler pin 26 may coincide with the shear line L ₂ and the plug 36 may be rotatable. In such an incompletely inserted state, the primary variable setting key K
_{When 1} is turned, the primary variable setting key K
_It is converted into a code suitable for _1, and becomes a code different from that of the primary variable setting key K ₁ .

As a method for preventing code conversion by a key in an incompletely inserted state, a key restriction groove 2a for restricting the insertion / removal position of the key is provided on the upper and lower portions of the annular peripheral wall 2 of the case 1 (see FIG. 19). ), The keys (keys such as the initial key K and the variable key K ₁ ) may be provided with a notch 30 that avoids interference with the annular peripheral wall 2 when fully inserted.

In this case, since the annular peripheral wall 2 abuts the key at a position other than the cutout portion 30, only when the key is completely inserted and the cutout portion of the key coincides with the annular peripheral wall 2.
The key can be turned. Therefore, when the key is imperfectly inserted, the key cannot be rotated, and the code of the cylinder lock cannot be changed.

[0014]

However, the notch 3 is formed in the key.
When 0 is set, the notch effect is generated by the cutout portion 30 and the strength of the key is significantly reduced. If the key breaks from the notch 30 during the operation of the variable code inserted into the keyhole 23, the key may be returned to the insertion / removal angle.
Since it is extremely difficult to take out the key, there is a problem that the variable cord type cylinder lock must be replaced. The present invention is intended to solve the above problems, and provides a variable code type cylinder lock that reliably prevents code conversion when a key is imperfectly inserted without providing a notch in the key. Is.

[0015]

In order to achieve the above object, according to the present invention, a plug which is rotatably inserted into a cylindrical case is provided with a tumbler hole which intersects with a key hole opened on the front side. A plurality of plugs are arranged in the longitudinal direction of the plug, a tumbler is inserted in the tumbler, a reset plate insertion hole is provided in the plug, and a reset cam that is inserted between the case and the plug is overlapped with the reset plate insertion hole. A plate engaging portion is provided, the reset plate inserted into the reset plate insertion hole is biased in a direction projecting to the reset plate engaging portion, and the reset plate is operated in the biasing opposite direction to the case. An operation unit is provided to immerse the reset plate into the reset plate insertion hole from the reset plate engagement unit,
In a variable code type cylinder lock in which a code is converted by operating the operation unit and inserting a variable key, at least one of a plurality of key code protrusions of a key is used as a complete insertion confirmation code protrusion, and the key is completely inserted. At the time, the tumbler hole corresponding to the complete insertion confirmation cord projection is provided with a complete insertion confirmation tumbler that moves to a position where the engagement with the case is released when being pushed by the complete insertion confirmation cord. It is characterized by that. It is convenient to provide the complete insertion confirmation code projection at the most distal end of the plurality of key code projections of the key.

[0016]

The operation of the variable cord type cylinder lock constructed as described above will be explained. Since the reset plate projects from the plug and engages with the joint cam, the plug and the joint cam are engaged with each other. When the key is inserted into the key hole, the tumbler pressed by the key code protrusion provided on the key moves in the direction in which the plug can be rotated. When the key is fully inserted, the full insertion confirmation tumbler is pressed by the full insertion code of the key and moves in a direction that allows the plug to rotate. When the key is rotated to the unlocking angle in such a state, the joint cam is rotated to the unlocking angle together with the plug, and the locking cam provided on the joint cam is unlocked and unlocked.

When it is necessary to change the key code of the cylinder lock, the plug can be rotated only by operating the operating portion to release the engagement between the plug and the joint cam. In this state, rotate the plug a predetermined angle with the initialization key inserted in the key hole, pull out the initialization key, and completely insert the primary variable setting key into the key hole. Since the confirmation tumbler moves in a direction that allows the plug to rotate, the plug can rotate, but the plug cannot rotate unless the primary variable setting key is completely inserted.

When the primary variable setting key is rotated, the variable code type cylinder lock is converted into the code of the primary variable setting key. As described above, the variable code type cylinder lock can be converted into a code suitable for the secondary variable setting key or the tertiary variable setting key only when the key is completely inserted. Can be restored.

[0019]

The variable code type cylinder lock of the present invention can be applied to a cylinder lock of a type that does not use a side bar as in the conventional example, but in the embodiment, a cylinder lock of a type using a side bar is used. A description will be given with reference to the drawings. 1 is a vertical sectional view of the variable code cylinder lock, FIG. 2 is a front view of the variable code cylinder lock, and FIG. 3 is AA of FIG.
FIG. 4 is a sectional view taken along the line EE of FIG. As shown in FIG. 1, a peripheral wall 32 that prevents axial movement of a plug 36, which will be described later, is provided at the front of a case 31 formed in a tubular shape. A mounting flange 33 is provided at the rear of the case 31, and mounting holes 34 are provided at two positions above and below the mounting flange 33.

An engagement recess 35 is provided on the inner peripheral surface of the case 31 in parallel with the axial direction of the case 31, and both side walls of the engagement recess 35 are inclined surfaces that gently connect to the inner peripheral surface of the case 31. Is formed (see FIG. 3). The plug 36 that is rotatably inserted into the case 31 has a keyhole 3 that opens to the front.
7 are provided (see FIG. 2).

Tumbler holes 39 intersecting the keyhole 37 at right angles are provided at a plurality of positions in the longitudinal direction of the plug 36, and tumbler holes 38 are provided at the rearmost portion. As shown in FIG. 3, the lower half portion of each tumbler hole 39 is branched into a first tumbler hole 40 and a second tumbler hole 41, and the key hole 37 is opened in the first tumbler hole 40. From the inner wall surface of each first tumbler hole 40 toward the outer peripheral surface of the plug 36, a long-hole-shaped retractor housing hole 42 that is long in the axial direction of the plug 36 penetrates, and a bottomed hole is formed at both ends of the retractor housing hole 42. 43
Are provided (see FIG. 6).

The retractor 44, which is inserted into the retractor accommodating hole 42, is provided with an engaging projection 45 which can be engaged with the engaging recess 35 of the case 31 at the end contacting the inner peripheral surface of the case 31, and has a bottom. The spring 46 inserted into the hole 43 of
The engagement protrusion 45 is biased in a direction to engage with the engagement recess 35 (see FIGS. 3 and 6). The lower half portion of the variable tumbler 47 inserted into each tumbler hole 39 is inserted into the first tumbler hole 40, and the right end surface of the variable tumbler 47 is in sliding contact with the retractor 44 in FIG.

The variable tumbler 47 is provided with a sawtooth meshing portion 48 having a shape in which a large number of mountain shapes of the same shape and size are arranged at the tip end on the left side in FIG. Variable tumbler 4
A key engagement groove 50 that engages with the key code protrusion 49 (see FIG. 1) of the key inserted in the key hole 37 is provided on the left side surface of the reference numeral 7 (see FIG. 3).

From the inner wall surface of each second tumbler hole 41 toward the outer peripheral surface of the plug 36, a long side bar accommodating hole 51 elongated in the axial direction of the plug 36 penetrates. The sidebar housing hole 51 is provided with a wide hole portion 51a on the outer peripheral surface side of the plug 36, and the sidebar 52 inserted into the sidebar housing hole 51 has a tip portion 52a inserted into the wide hole portion 51a.
Is formed into a shape that can be engaged with the engaging recess 35.
Holes 58 with a bottom are provided at both ends of the sidebar housing hole 51, and the spring 53 is inserted into the hole 58 with a bottom (see FIG. 6). Therefore, the side bar 52 is urged in the direction in which the tip portion 52 a is engaged with the engagement recess 35.

The tumbler plate 54 inserted into each tumbler hole 39 has a lower half portion inserted into the second tumbler hole 41 and a side bar engaging groove 55 into which a rear end portion of the side bar 52 can be engaged. 3, a meshed portion 56 that can be engaged with and disengaged from the meshing portion 48 is provided at the right end portion.

A complete insertion confirmation cord protrusion 78 is provided at the tip of the key K (see FIG. 1), and the plug 36 is positioned at a position opposite to the complete insertion confirmation cord protrusion 78 when the key K is completely inserted. A tumbler hole 38 is provided. Tumbler hole 3
The key insertion hole 75 is provided in the central portion of the complete insertion confirmation tumbler 74 to be inserted in 8, and the end portion is engaged with the engagement hole 77 of the case 31 by the spring 76 (see FIG. 4).
When the regular key K is completely inserted into the key hole 37, the complete insertion confirmation tumbler 74 whose key insertion hole 75 is pressed by the complete insertion confirmation code protrusion 78 is retracted into the plug 36 (see FIG. 5). ), The plug 36 becomes rotatable.

In this embodiment, the code insertion protrusion 78 for complete insertion is provided at the tip of the key K, and the key tumbler hole 38 is provided.
Although it is provided on the rear side of the rearmost tumbler hole 39 (see FIG. 1), the complete insertion confirmation code protrusion 78 may be provided, for example, in the middle of the key code protrusion 49 of the key. In this case, it goes without saying that the position of the tumbler hole 38 corresponds to the complete insertion confirmation code protrusion 78 of the fully inserted key. However, when the tumbler hole 38 is provided on the rear side of the rearmost tumbler hole 39, the complete insertion confirming tumbler 74 is pushed only when the key is completely inserted, so that the reliability is further improved. Is high.

A small diameter portion 57 is formed at the rear of the plug 36, and the small diameter portion 57 has a bottomed reset plate insertion hole 5.
9 is provided (see FIG. 1). The joint cam 60 is
The cylindrical portion 61 is rotatably inserted between the inner peripheral surface of the case 31 and the small diameter portion 57, and the shaft portion 63 connected to the cylindrical portion 61 via the rear wall 62 is provided. The locking cam 64 is screwed.

The cylindrical portion 61 has a reset plate insertion hole 5
The slotted reset plate engagement hole 6 is provided at a position overlapping 9
5 is provided, and the spring 6 is provided in the reset plate insertion hole 59.
6 and the plate-shaped reset plate 67 are inserted (see FIG. 7).
reference). Therefore, the reset plate 67 is urged in the direction in which the upper end thereof projects into the reset plate engagement hole 65 (see FIG. 9).

On the rear surface of the mounting flange 33 of the case 31, there are provided a cover mounting recess 68 and a cutout groove 69 extending from the cover mounting recess 68 to a position overlapping the reset plate engaging hole 65 (see FIG. 1). A long hole 71 communicating with the cutout groove 69 is provided at the upper end of the cover 70 fitted in the mounting recess 68 (FIG. 7).
reference). The reset button 72 is inserted into the notch groove 69, and the upper end portion of the reset plate 67 biased upward contacts the reset button 72, so that the reset button 7
The second operation portion 72a is inserted into the elongated hole 71 so as to be able to move up and down.

Therefore, when the operating portion 72a is pushed downward, the reset button 72 is inserted into the reset plate engaging hole 65 of the cylindrical portion 61, and the reset plate 67 is recessed in the small diameter portion 57 (see FIGS. 7 and 8). ). Joint cam 6
0 is provided with a protrusion 73 on the outer peripheral surface (see FIG. 1), and the cover 70 is provided with a stopper (not shown) for restricting the amount of rotation of the protrusion 73.

Next, the operation of the variable code type cylinder lock configured as described above will be described with reference to the locked state of the cylinder lock set in the initial code, the unlocking operation by the initial setting key, and the code conversion by the primary variable setting key. The operation will be described in order.
In the cylinder lock set to the initial code, the tip portion 52a of the side bar 52 projects from the outer peripheral surface of the plug 36,
The plug 36 is engaged with the engaging recess 35 of the case 31, the side surface of the tumbler plate 54 abuts on the rear end of the side bar 52, and prevents the side bar 52 from sinking into the plug 36. It cannot rotate.

The engaging projection 45 of the retractor 44 is the case 3
1, the retractor 44 is retracted into the plug 36, and the retractor 44 is pushed by the retractor 44.
The meshing portion 48 is in mesh with the meshed portion 56.
The reset plate 67 projects from the plug 36, and the reset plate engaging hole 6 of the tubular portion 61 of the joint cam 60.
Since it is engaged in 5, the plug 36 and the joint cam 6
0 is engaged (see FIGS. 1 and 9).

When the initial setting key K is inserted into the keyhole 37,
The key code protrusion 49 of the key K pushes the key engagement groove 50 of the variable tumbler 47, and the variable tumbler 47 is moved by the retractor 4.
It moves while slidingly contacting the surface of 4. Variable tumbler 4
The tumbler plate 54 meshing with 7 moves integrally with the variable tumbler 47 to move the side bar engaging groove 55.
Overlaps the rear end of the sidebar 52, so the sidebar 5
2 can be immersed in the plug 36 (see FIG. 3).

When the initialization key K is rotated, the side bar 52 is pushed out from the engaging recess 35 and is recessed in the plug 36, and the rear end of the side bar 52 is tumbler plate 5.
4 is inserted into the sidebar engaging groove 55. When the plug 36 rotates together with the initialization key K, the reset plate 6
Joint cam 6 engaged with plug 36 by 7
0 rotates together.

When it becomes necessary to change the key code of the cylinder lock, the reset button 72 is pushed downward to immerse the reset plate 67 into the small diameter portion 57 of the plug 36, and the plug 36 and the joint are joined. The engagement with the cam 60 is released, and only the plug 36 can be rotated with the joint cam 60 stopped (see FIG. 8). With the reset button 72 pushed downward, the keyhole 3
When only the plug 36 is rotated 180 degrees by the initial setting key K inserted in 7, the engaging protrusion 45 of the retractor 44 is aligned with the engaging recess 35 of the case 31, and the retractor 44 is rotated.
Is moved by the spring 46 in a direction in which the engagement protrusion 45 is engaged with the engagement recess 35 of the case 31. Since this movement amount is smaller than the depth of the key engagement groove 50, the engagement between the key K and the variable tumbler 47 is not released.

The initial setting key K rotated 180 degrees can be pulled out from the key hole 37. When the initial setting key K is pulled out, the variable tumbler 47 pushed in the key engaging groove 50 is moved along the tumbler hole 39. Move, but tumbler plate 54
Is constrained from moving by the sidebar 52,
A component force is generated in the direction in which the serrated meshing portion 48 is disengaged from the meshed portion of the tumbler plate 54, and the variable tumbler 47 moves in the direction of the retractor 44 (see FIG. 10). The reset plate 67 moved downward is prevented from projecting by the inner peripheral surface of the tubular portion 61 of the joint cam 60 (FIG. 11).
reference).

Next, when the primary variable setting key K ₁ is inserted into the keyhole 37, the key code protrusion 4 of the primary variable setting key K ₁
The variable tumbler 47 whose key engaging groove 50 is pressed by 9 moves to a position matching the code of the primary variable setting key K ₁ , but at this time, the tumbler plate 54 does not move. On both sides of the key engaging groove 50, the key code protrusion 49 of the key K ₁ is provided.
Are brought into contact with each other, the movement of the variable tumbler 47 is reliably regulated.

When the primary variable setting key K ₁ is completely inserted, the complete insertion confirming tumbler 74 pushed by the complete insertion confirming protrusion 78 is disengaged from the engaging hole 77 of the case 31 and the inside of the plug 36. When the primary variable setting key K ₁ is incompletely inserted, the complete insertion confirmation tumbler 74 is inserted into the case 31.
Since the plug 36 is engaged with the engaging hole 77 and the plug 36 cannot rotate, the code conversion operation is prevented when the primary variable setting key K ₁ is incompletely inserted.

When the fully inserted primary variable setting key K ₁ is rotated, the retractor 4 pushed out from the engaging recess 35.
4 pushes the variable tumbler 47, and the sawtooth meshing portion 48 of the variable tumbler 47 is meshed with the tumbler plate 54.
6 is engaged, and the variable code type cylinder lock is converted into the code of the primary variable setting key. The cylinder lock of this embodiment is
It can be converted into three types of key codes.

When the primary variable setting key K ₁ is rotated 180 degrees, the reset plate 67 is returned to the old state by the spring 66 (see FIG. 12), and the tip end portion 52a of the side bar 52 is aligned with the engaging recessed portion 35. Therefore, it can be unlocked only by the primary variable setting key K ₁ . As described above, the variable code type cylinder lock can be converted into a code suitable for the secondary variable setting key and the tertiary variable setting key, and the initial code can be restored to the initial code. There is no risk of code conversion in the incompletely inserted state.

12 to 17 show a second embodiment of the variable code type cylinder lock of the present invention, which is an improvement of the conventional variable code type cylinder lock shown in FIGS. 18 to 20. Is. The difference from the conventional example lies in the mechanism for preventing the code conversion operation in the incompletely inserted state of the key, and the other structure is the same as the conventional example, so only the difference will be explained.

In the second embodiment, instead of the key regulating groove 2a of the annular peripheral wall 2 and the cutout portion 30 of the key, which are provided in the conventional example, the cord for complete insertion confirmation is inserted in the key K as in the first embodiment. A tumbler hole 80 provided with a protrusion 78 and corresponding to the complete insertion confirmation code protrusion 78 when the key K is completely inserted
Further, there is provided a complete insertion confirmation tumbler pin 81 which moves to a position where the engagement with the case 1 is released when pushed by the complete insertion confirmation cord protrusion 78 (see FIGS. 12 and 13).

The case 1 is provided with a driver pin hole 82 facing the tumbler hole 80, and the driver pin 83 and the spring 6 are inserted into the driver pin hole 82. The driver pin 83 pushed by the spring 6 engages with the tumbler hole 80 to prevent the plug 22 from rotating. Therefore, when the key K is not completely inserted, the key code conversion operation is prevented (see FIG. 15).

To convert the key code of the cylinder lock,
When the key K is completely inserted, the complete insertion confirmation code protrusion 78 pushes the complete insertion confirmation tumbler pin 81,
Since the end face of the tumbler pin 81 for complete insertion coincides with the shear line, the joint cam 14 which is the intermediate cylinder can be rotated together with the plug 22 (FIG. 16, FIG.
(See FIG. 17). When the operation pin 9 is pushed by the reset button 13 and the initial setting key K is rotated 180 degrees, only the plug 22 is rotated 180 degrees. Next, the initial setting key K is pulled out, the primary setting key is inserted, and the code is converted by rotating 180 times.

[0046]

Since the present invention is configured as described above, it is possible to reliably prevent the risk of conversion into a code different from that of the variable setting key due to incomplete insertion of the variable setting key. Further, since it is not necessary to provide the variable setting key with a notch as in the conventional example, there is no possibility that the key will break due to local stress.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a variable code cylinder lock.

FIG. 2 is a front view of a variable code cylinder lock.

3 is a cross-sectional view taken along the line AA of FIG.

4 is a cross-sectional view taken along the line EE of FIG. 1 in a state where a key is not inserted.

5 is a cross-sectional view taken along the line EE of FIG. 1 in a key inserted state.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is a longitudinal cross-sectional view of a main part of the variable cord cylinder lock when the reset button is pushed.

FIG. 8 is a partially cutaway rear view of the variable code cylinder lock when the reset button is pushed.

FIG. 9 is a partially cutaway rear view of the variable cord cylinder lock when the reset button is not pushed.

[FIG. 10] The reset button is operated and the plug is set to 1
It is sectional drawing explaining the state rotated by 80 degrees.

11 is a cross-sectional view taken along line CC of FIG.

FIG. 12 is a vertical sectional view of a variable code cylinder lock showing a second embodiment of the present invention.

FIG. 13 is a front view of FIG.

FIG. 14 is a rear view of FIG.

FIG. 15 is a vertical cross-sectional view of the variable code cylinder lock with the key inserted incompletely.

FIG. 16 is a vertical cross-sectional view of the variable code cylinder lock with the key completely inserted.

FIG. 17 is a vertical cross-sectional view of the variable code cylinder lock during a code conversion operation.

FIG. 18 is a vertical cross-sectional view showing a conventional example of a variable code type cylinder lock.

FIG. 19 is a front view of the main parts of FIG.

FIG. 20 is a vertical sectional view for explaining code conversion of a variable code type cylinder lock.

[Explanation of symbols]

 31 Case 36 Plug 37 Key Hole 38 Tumbler Hole 39 Tumbler Hole 44 Retractor 47 Variable Tumbler 49 Key Code Protrusion 52 Side Bar 54 Tumbler Plate 57 Small Diameter Outer Surface 59 Reset Plate Insertion Hole 60 Joint Cam 61 Cylindrical Part 65 Reset Plate Engagement Hole 66 Spring 67 Reset plate 72 Reset button 72a Operation portion 74 Full insertion confirmation tumbler 77 Engagement hole 78 Full insertion confirmation cord protrusion 80 Tumbler hole 81 Full insertion confirmation tumbler pin

Claims (2)

[Claims] 1. A plug rotatably inserted in a cylindrical case is provided with a plurality of tumbler holes in the longitudinal direction of the plug, the tumbler holes intersecting a keyhole opening on the front surface, and the tumbler is inserted into the tumbler hole. Then, a reset plate insertion hole is provided in the plug, and a reset plate engagement portion that overlaps the reset plate insertion hole is provided in the junit cam inserted between the case and the plug, and the reset plate insertion hole is inserted in the reset plate insertion hole. The reset plate is biased in a direction projecting to the reset plate engagement portion, and the reset plate is operated in the opposite direction to the case by pushing the reset plate from the reset plate engagement portion to the reset plate insertion hole. A variable code type cylinder provided with an immersive operation unit, and code conversion is performed by operating the operation unit and inserting a variable key. In at least one of the plurality of key code protrusions of the key is a complete insertion confirmation code protrusion, and when the key is fully inserted, the complete insertion confirmation code protrusion is inserted into the tumbler hole corresponding to the complete insertion confirmation code protrusion. A variable code type cylinder lock characterized in that a tumbler for complete insertion confirmation is provided which moves to a position where the engagement with the case is released when pushed by the confirmation cord. 2. The variable code type cylinder lock according to claim 1, wherein the complete insertion confirmation code projection is provided at a most distal end of the plurality of key code projections of the key.