JPH09132976A - Variable code type cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the risk of being converted to an unintended code due to an imcomplete key. SOLUTION: A projection is provided on a case 30, a driver pin, a push pin, a variable code pin and a joint pin are inserted in the case 30, an intermediate pin 57 is inserted in an intermediate ring 40 rotatably inserted in the case 30, and a tumbler pin 58 is inserted in a plug 46 rotatably inserted in the intermediate ring 40. A tumbler storing chamber 49 is provided to be communicated with a keyway 47, a complete insertion confirming tumbler inserted in a tumbler storing chamber 49 is provided with a key insert hole and engergized in the direction of being engaged with the intermediate ring 49 so that when a key is completely inserted, the plug 46 can be rotated.

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.

[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. The variable code type cylinder lock includes the technology described in Japanese Patent Laid-Open No. 3-234275. The variable code type cylinder lock A will be briefly described with reference to FIG.
As shown in the longitudinal sectional view of FIG.
The cylindrical portion 2a of the intermediate ring 2 is rotatably inserted in
The tongue 3 is attached to the shaft portion 2b extending to the rear end (right end in FIG. 19) of the tubular portion 2a, and the plug 4 is rotatably inserted into the tubular portion 2a.

The case 1 is provided with a plurality of rows of driver pin holes 5 arranged in the axial direction of the case 1 on the upper side, and a row of push pin holes 6 on the lower side of the case 1. To
A cover 7 is provided to cover the driver pin hole 5 and the push pin hole 6. A spring 8 and a driver pin 9 are inserted into each driver pin hole 5, a reset pin hole 10 is provided at the rear of the row of driver pin holes 5, a reset pin 11 is inserted into the reset pin hole 10, and each push pin is inserted. In the hole 6, the spring 1
2 and the push pin 13 are inserted.

The intermediate ring 2 has an intermediate pin hole 14 corresponding to each driver pin hole 5 at the locking angle shown in FIG.
And a variable cord pin hole 15 that matches each push pin hole 6
And an intermediate reset pin hole 16 that matches the reset pin hole 10 is provided. An intermediate pin 17 is provided in each intermediate pin hole 14.
The variable code pin 18 is inserted into each variable code pin hole 15, and the intermediate reset pin 19 is inserted into the intermediate reset pin hole 16.

The thickness of the intermediate pin 17 is substantially equal to the length of the intermediate pin hole 14, and the total thickness of the three variable cord pins stacked is approximately equal to the length of the intermediate pin hole 14. The variable code pins 18 have a number (three) that fills at least the variable code pin holes 15, and a larger number of variable code pins 18 are used for key code conversion. It is housed in 6.

The plug 4 is provided with a key hole 20 which is open to the front surface, and when the plug 4 is at the locking angle shown in FIG. 19, a tumbler pin hole 21 penetrating the outer peripheral surface of the plug 4 from the key hole 20 is an intermediate pin. Hole 22 with a bottom and a matching hole 14
Corresponds to the intermediate reset pin hole 16. A tumbler pin 23 is inserted into the tumbler pin hole 21, and a hole 22 with a bottom is provided.
The auxiliary reset pin 24 is inserted in the.

In FIG. 19, the tumbler pin hole 21 at the right end is shown.
One variable code pin 18 is inserted into each of the tumbler pin holes 21, and zero, two, and one variable code pin 18 are inserted into each tumbler pin hole 21 toward the left side. In the variable cord type cylinder lock A configured as described above, the first shear line L ₁ is formed on the outer peripheral surface of the intermediate ring 2, and the second shear line L ₂ is formed on the outer peripheral surface of the plug 4. . When inserting a key at the time of initial setting with key codes corresponding to 1, 0, 2 and 1 from the tip toward the rear,
Both end surfaces of the intermediate pin 17 coincide with the first shear line L ₁ and the second shear line L ₂ . On the other hand, reset pin 1
Since the contact surface between 1 and the intermediate reset pin 19 is aligned with the first shear line L ₁ and the auxiliary reset pin 24 is in the position to engage with the second shear line L ₂ , the plug 4 and the intermediate ring are operated by key operation. 2 rotate together, almost 9
The tongue 3 is unlocked at the unlocked position rotated by 0 degree.

In order to convert the key code, the reset pin 11 is pushed in so that the contact surfaces of the intermediate reset pin 19 and the auxiliary reset pin 24 coincide with the second shear line L ₂ (at this time, the reset pin 11 is in the first position). Shearline L
Engage ₁ ). Therefore, only the plug 4 can be rotated, and when the key is rotated by about 180 degrees, the tumbler pin hole 21 is aligned with the variable code pin hole 15.

Next, the key at the time of initial setting is removed, and the second key K having a key code of zero, two, one, and zero is inserted from the tip, and converted into a key code suitable for the second key K. (See FIG. 20). Next, when the second key K is rotated 180 degrees and pulled out, the key code conversion operation is completed.
You can convert it to the key code of the key at the time of initial setting again,
It is also possible to convert to a third key code.

[0011]

The variable code type cylinder lock A as described above has the following problems. (1) The variable code pin 18 inserted into the variable code pin hole 15 forms the shear line L ₁ during the locking / unlocking operation, and is also supplied to the plug 4 or the push pin hole 6 when converting the key code. In order to store the variable code pin, the variable code pin hole must be filled, a large number of variable code pins are required, and the number of parts is increased. (2) For example, if key code conversion is performed without noticing that the second key K is inserted shallowly by one pitch of the tumbler pin hole 21, the key that should be zero, two, one, or zero from the tip The code is the original code from the tip, zero, 2
Since it is converted into a key code arranged in one piece and becomes a code different from the second key K, there is a possibility that the second key K cannot be used. An object of the present invention is to solve such a problem.

[0012]

In order to achieve the above object, a variable cord type cylinder lock of the present invention is formed in a tubular shape, and an axially long protrusion is provided on the inner peripheral surface of the lock. A case in which a plurality of push pin holes are arranged, a plurality of driver pin holes are arranged in the inner peripheral surface in the axial direction, and a joint pin hole is provided on the rear side; An intermediate ring that is rotatably provided up to and that has an intermediate pin hole that coincides with the driver pin hole at a locking angle and an opening that coincides with the joint pin hole, and the inner peripheral surface of the intermediate ring and the tip of the protrusion. A key hole that is rotatably inserted along a surface and that is open to the front, a tumbler pin hole that matches the intermediate pin hole from the key hole, and a plug that includes a tumbler accommodating chamber that communicates with the opening, and the push pin. Inserted in the hole A variable code pin, a driver pin inserted into the driver pin hole and urged in a direction to engage with the intermediate pin hole, and an intermediate pin having the same length as the intermediate pin hole and inserted into the intermediate pin hole. A tumbler pin inserted into the tumbler pin hole, a push pin urged in a direction to push the variable code pin inserted into the push pin hole, and a tumbler housed in the tumbler storage chamber (59) A tumbler (64b) inserted into the opening of the intermediate ring, and a joint pin having an operating portion that is inserted into the joint pin hole and moves to a position where the end surface matches the outer peripheral surface of the plug. It is what

The outer peripheral surface of the plug may be provided with a shallow click groove into which the tip of the push pin engages when the plug is at the locking and unlocking angles. The operating part of the joint pin is composed of a reset pin inserted in the case in parallel with the axial direction of the case, and a concave portion having an inclined surface is formed on the upper part of the joint pin, and the key is completely inserted. At this time, the reset pin may be brought into contact with the inclined surface to move the joint pin. Alternatively, the operation portion of the joint pin may be configured by a manual operation lever integrally formed with the joint pin.

An engaging projection is formed at an end of the tumbler (59), and the engaging projection is engaged with an opening of the intermediate ring or an engaging recess formed at a position facing the opening. You can The tumbler (59) is a tumbler for complete insertion confirmation that is urged in a direction projecting to the outer periphery of the plug and pushed in the opposite direction by a key, and the tumbler (64b) engages with the joint pin. The joint pin and the tumbler (64b) are urged in a direction in which they are pressed against the full insertion confirmation tumbler, and when the full insertion confirmation tumbler is pushed by the fully inserted key. It is preferable that the connecting surface with and is located at a position that coincides with the outer peripheral surface of the intermediate ring. The joint surface between the joint pin and the tumbler (64b) is formed into a curved surface substantially similar to the outer peripheral surface of the intermediate ring, and the engagement protrusion provided on one end face engages with the engagement recess provided on the other end face. It is advisable to adopt a configuration in which it is detachably engaged.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a variable code type cylinder lock A ₁
2 is a longitudinal sectional view showing a locked state in which the key is not inserted, FIG. 2 is a BB sectional view of FIG. 1, and FIG. 3 is a CC sectional view of FIG. The front part of the case 30 formed in a tubular shape (the left end part in FIG. 1)
1, an annular peripheral wall 31 protruding to the inner peripheral surface is provided, a mounting flange 32 is provided at the rear portion of the case 30, and mounting holes 33 are provided at two positions above and below the mounting flange 32 (see FIG. 1).

On the lower side of the inner peripheral surface of the case 30, there are provided projections 34 that are long in the axial direction of the case 30 (see FIG. 3), and a plurality of (eight in this embodiment) pushers are provided on the projections 34. Moving pin holes 35 are arranged and provided (see FIGS. 1 and 3).
The same number of driver pin holes 36 as the push pin holes 35 are arranged on the upper side of the case 30 in the axial direction of the case 30, and the joint pin holes 3 are provided behind the driver pin holes 36.
7 is provided, and an elongated hole 38 that communicates with the joint pin hole 37 from the rear surface of the case 30 is provided. On the outer peripheral surface of the case 30, grooves 39 intersecting with the rows of the driver pin holes 36 and the rows of the pushing pin holes 35 are engraved, and a cover 40 is attached to the grooves 39.

The intermediate ring 41 has a shaft portion 41b behind a cylindrical portion 41a which is rotatably inserted into the inner peripheral surface of the case 30.
The cylindrical portion 41a is formed in a substantially semi-circular shape so as to cut out a range that interferes with the protrusion 34 when rotating from the locking angle to the unlocking angle. A tongue (not shown) for locking and unlocking is attached to the shaft portion 41b. The tubular portion 41a has the same wall pressure as the height of the protrusion 34, and the intermediate pin hole 42 (see FIGS. 1 and 3) that matches each driver pin hole 36 at the locking angle shown in FIG. An opening 43 (see FIG. 2) corresponding to the hole 37 is provided.

The opening 43 is provided with notches 43a on both sides of the hole having the same diameter as the joint pin hole 37, into which the engaging projection 61 of the fully inserted confirmation tumbler 59 described later can be engaged (see FIG. 2). An annular groove 44 that intersects the opening 43 is provided on the outer peripheral surface of the tubular portion 41a (see FIGS. 1 and 2). On the inner peripheral surface of the tubular portion 41a, the engaging recess 4 is formed on the side opposite to the opening 43.
5 are provided.

The plug 46, which is rotatably inserted into the inner peripheral surface of the tubular portion 40a, also comes into sliding contact with the tip end surface of the protrusion 34 of the case 30. The plug 46 has a key hole 47 that opens to the front, a tumbler pin hole 48 that communicates with the plug 46 through the key hole 47, and that corresponds to each intermediate pin hole 41 at the locking position shown in FIG. 13, and behind the tumbler pin hole 48. A tumbler storage chamber 49 is provided. A hole 50 having the same diameter as the joint pin hole 36 is provided in the tumbler accommodating chamber 49, and an opening 51 (see FIG. 2) opening to the outer peripheral surface of the plug 46 is provided on the opposite side of the circular hole 50.

The spring 52 and the driver pin 53 are inserted into the respective driver pin holes 36 of the case 30, and the driver pin 5
3 is biased in a direction to engage with the intermediate pin hole 42 of the intermediate ring 41 (see FIG. 4). A spring 54, a push pin 55, and a variable cord pin 56 are inserted into each push pin hole 35. In this embodiment, two variable cord pins 56 are inserted into the push pin holes 35 at the initial stage. Therefore,
The push pin 55 is biased in a direction to push the variable cord pin 56.

In each intermediate pin hole 42 of the intermediate ring 41,
An intermediate pin 57 having a length substantially equal to that of the intermediate pin hole 42 is inserted (see FIG. 4). Each tumbler pin hole 4 of the plug 46
A tumbler pin 58 is inserted into the tumbler storage chamber 4
A plate-shaped complete insertion confirmation tumbler 59 is inserted into 9 (see FIGS. 2 and 4).

The complete insertion confirmation tumbler 59 is provided with a key insertion hole 60 at substantially the center thereof, and an engagement recess 45 of the intermediate ring 41 and an engagement projection 61 which can be engaged with and disengaged from the opening 43 at the end of the tumbler 59. A spring 62 inserted between the accommodating chamber 49 and the complete insertion confirmation tumbler 59 urges the engaging projection 61 in a direction projecting from the outer peripheral surface of the plug 46 (see FIG. 2).

The spring 63 and the upper portion 64a of the joint pin 64 are inserted into the joint pin hole 37 of the case 30. The joint pin 64 includes an upper portion 64a and an upper portion 64a.
It is composed of a tumbler 64b that can be attached to and detached from the upper part 6
4a is provided with an operating portion 70 that projects rearward of the case 30 via the elongated hole 38. A pin 72 having both ends fixed to the case 30 is provided in a vertically elongated hole 71 provided in the upper portion 64a.
Is inserted (see FIG. 4).

The tumbler 64b is inserted into the opening 43 of the intermediate ring 41 and the circular hole 50 of the plug 46 (see FIG. 5).
reference). The upper and lower connecting surfaces of the joint pin 64 are formed on the same pole surface as the outer peripheral surface of the intermediate ring 40.
The engaging protrusion 65 provided on the end surface of a is a tumbler 64b.
It engages with a dovetail groove-shaped engaging concave portion 66 provided in (FIG. 4).

Next, the operation of the variable code type cylinder lock A ₁ constructed as described above will be described with reference to FIGS.
A description will be given in the order of locked state with no key inserted, key insertion at the time of initial setting, locking and unlocking operation, and key code conversion operation. In the locked state where the key is not inserted, as shown in FIGS. 1 and 3, the driver pin 53 pushed by the spring 52 moves the intermediate ring 41.
The first shear line L ₁ that is the outer peripheral surface of the plug 46 and the intermediate pin 57 that is pushed by the driver pin 53 engages the second shear line L ₂ that is the outer peripheral surface of the plug 46.
The tip of the tumbler pin 58 pushed by 7 projects into the key hole 47. Further, the engagement protrusion 61 of the complete insertion confirmation tumbler 59 is engaged with the engagement recess 45 of the intermediate ring 41 (see FIG. 2). Therefore, neither the plug 46 nor the intermediate ring 41 can rotate.

In such a locked state, when the key K ₁ at the time of initial setting is completely inserted into the key hole 47, the tumbler pin 58 pushed by the key K ₁ pushes the intermediate pin 57, and both end faces of the intermediate pin 57 are pushed. Correspond to the first shear line L ₁ and the second shear line L ₂ (see FIG. 4).

On the other hand, the tip end of the fully inserted key K ₁ pushes the key insertion hole 60 of the complete insertion confirmation tumbler 59, so that the complete insertion confirmation tumbler 59 moves upward by a predetermined amount in the opposite direction to the urging protrusion. 61 is the engaging recess 4 of the intermediate ring 40.
5, the tumbler 64b of the joint pin 64 is pushed up (see FIG. 5), and the connecting surface between the upper portion 64a of the joint pin 64 and the tumbler 64b coincides with the first shear line L ₁ . Further, since the tumbler 64b engages with the second shear line L ₂ , the intermediate ring 40 and the plug 46
Can rotate together. Therefore, the complete insertion confirmation tumbler 59 confirms the complete insertion of the key and
It has the function of two key codes.

When the key K ₁ is rotated approximately 90 degrees to the unlocked position, the upper portion 64 together with the plug 46 and the intermediate ring 40 are
The tumbler 64b of the joint pin 64 separated from a rotates integrally (see FIG. 6), and the tongue (not shown) attached to the shaft portion 41b of the intermediate ring 41 moves to the unlocked position and is unlocked. It At this time, the upper part 64a
The engaging projection 65 of the above passes through the annular groove 44. When the key K ₁ is rotated back to the original locked position and the key K ₁ is pulled out, the locked state shown in FIGS. 1 and 2 is restored.

Next, the key code conversion will be described. From the state in which the key K ₁ at the time of initial setting is completely inserted into the key hole 47 of the variable code type cylinder lock A ₁ , the operating portion 70 of the joint pin 64 is pushed upward. (See Figure 7). By this operation, the tumbler 64b rises together with the upper portion 64a of the re-joint pin 64, the lower portion 46b of the joint pin 64 engages with the first shear line L ₁ , and the lower end surface of the lower portion 46b becomes the second shear line L ₂ . Match.
Further, when the key K ₁ is completely inserted, the engagement protrusion 61 of the complete insertion confirmation tumbler 59 is disengaged from the engagement recess 45 of the intermediate ring 40. Therefore, only when the key K ₁ is completely inserted and the reset pin 68 is operated, the plug 46
Only the pivot is possible.

Next, only the plug 46 is rotated approximately 180 degrees by the key K ₁ , and the tumbler pin hole 48 and the push pin hole 3 are rotated.
When 5 are matched, the variable cord pin 56 in the push pin hole 35 overlaps with the tumbler pin 58 (see FIGS. 8 and 10). Since the joint pin 64 does not engage with the opening 51 of the tumbler accommodating chamber 49, the joint pin 64 remains in contact with the outer peripheral surface of the plug 46, and therefore the operating portion 70 can be released. Complete insertion confirmation tumbler 59 engagement projection 6
1 is in a position facing the opening 43 of the intermediate ring 41, but the key K ₁ is in the fully inserted state, so that it does not engage with the opening 43 (see FIG. 9).

Next, when the key K ₁ is pulled out, the push pin 55
The variable code pin 56 pushed by is inserted into the tumbler pin hole 48, and the tumbler pin 58 projects into the key hole 47 (see FIG. 11). Engagement protrusion 61 of complete insertion confirmation tumbler 59
Engages with the notch 43a of the opening 43 (see FIG. 12).

Next, when the second key K ₂ is completely inserted, the tip of the second key K ₂ pushes the key insertion hole 60, and the complete insertion confirmation tumbler 59 moves in the opposite direction of the bias to engage the protrusion. 6
1 disengages from the opening 43. On the other hand, according to the position of the tumbler pin 58 pressed by the second key K ₂ , the variable code pin 5
6 varies (see FIG. 13), and each tumbler pin hole 4
8 is a variable cord pin 56 from the rightmost end to the left.
, 2, 1, 2, zero, 1, 2, 2, 1, 1 are inserted and converted into the code of the second key K ₂ . next,
When the second key K ₂ is turned to return to the original locked position (see FIG. 14) and the second key K ₂ is pulled out, the key code conversion operation is completed.

When the second key K ₂ is not completely inserted, for example, when the tumbler pin hole 48 is shallowly inserted by one pitch, the complete insertion confirmation tumbler 59 does not move in the opposite direction to the urging force. The engaging protrusion 61 is the intermediate ring 4.
Since it is engaged with the first opening 43, the rotation of the plug 46 is prevented. Therefore, there is no risk of code conversion in the incompletely inserted state of the key, which is a major feature of the present invention.

It is desirable to provide the cylinder lock with a click mechanism for lightly locking the plug 46 at the locking and unlocking angles. The variable code type cylinder lock of the present invention can be provided with a click mechanism having a simple structure without increasing the number of parts. As shown in FIG. 16, a push pin 55 ′ having a slightly pointed tip is used in place of the push pin 55 having a flat tip surface, and the plug 46 is locked on the outer peripheral surface of the plug 46. The shallow groove 74a (see FIG. 16) into which the tip of each push pin 55 'engages when the plug 46 is at the angle, and the tip of each push pin 55' engages when the plug 46 is at the unlock angle. A shallow groove 74b (see FIG. 17) having a bottom is provided.

As shown in FIG. 15, among the plurality (eight in this embodiment) of push pins 55 ', some push pins 55' directly contact the outer peripheral surface of the plug 46 in accordance with the key code.
When the plug 46 reaches the locking angle and the unlocking angle, the pushing pin 55 ′ of the plug 46 engages with the pushing force of the spring 54 into the holes 74 a and 74 b. Therefore, there is an effect that the plug 46 becomes stable at the locking angle and the unlocking angle.

FIG. 18 is a longitudinal sectional view of a main part of a variable cord type cylinder lock A ₁ showing a second embodiment of the operating portion of the joint pin 64.
A reset pin hole 67 communicating with 7 is provided. A portion of the reset pin hole 67 that opens to the joint pin hole 37 is formed as a small diameter hole 67a. In the reset pin hole 67, the spring 68, which is the operating portion of the joint pin 64, and the reset pin 6
Insert 9.

When the reset pin 69 is pushed against the spring 68, the tip of the reset pin 69 projects into the joint pin hole 37 via the small diameter hole 67a. On the side surface of the upper portion 64a of the joint pin 64, a concave portion 73 having an inclined surface whose inner wall increases toward the outside is provided. The upper portion 64a of the joint pin 64 is provided with the engaging projection 65, and the tumbler 64b is provided with the engaging concave portion 66, as in the above embodiment.

The position of the inclined surface of the recess 73 is usually lower than the tip of the reset pin 69. Even if the reset pin 69 is pushed in, the joint pin 64 is not pushed up, but the key K ₁ is completely inserted. When the complete insertion confirmation tumbler 59 rises, the position of the inclined surface of the recess 73 of the joint pin 64 pushed by the complete insertion confirmation tumbler 59 becomes the height at which the reset pin 69 can be pushed (see FIG. 18). .

Only when the key K ₁ is completely inserted and the reset pin 69 is pushed in, the joint pin 64 pushed up by the inclined surface of the concave portion 73 is raised, and the joint pin 6 is pushed.
The connecting surface between the upper portion 64a of 4 and the tumbler 64b coincides with the first shear line L ₁ . If the key K ₁ is not fully inserted, the joint pin 6
4 does not rise. Therefore, when such an operation unit is provided, the variable code cylinder lock cannot be operated with the key incompletely inserted, so that the variable code cylinder lock is converted into an unintended code by the incomplete insertion of the key. The problem can be resolved.

[0040]

Since the present invention is constructed as described above, it has the following effects. (1) In the conventional variable cord cylinder lock, useless variable cord pins that are not used for variable cords are accommodated in the intermediate ring, but in the variable cord cylinder lock of the present invention, unnecessary variable cord pins are unnecessary. Is. (2) In the conventional variable code type cylinder lock, when the code is converted in the incompletely inserted state of the key, it may be an unintended code different from the key, but in the variable code type cylinder lock of the present invention, The code is converted surely.

(3) The complete insertion confirmation tumbler has not only the function of preventing the key code conversion due to the incomplete insertion of the key, but also the key code check function as well as the set of the tumbler pin, the intermediate pin and the driver pin. There is. (4) The variable code cylinder lock of the present invention can be provided with a click mechanism having an extremely simple structure.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a key-uninserted state of a variable code cylinder lock.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a sectional view taken along line CC of FIG. 1;

FIG. 4 is a vertical cross-sectional view of a variable code cylinder lock with an initialization key inserted.

FIG. 5 is a sectional view taken along the line DD of FIG. 4;

FIG. 6 is a cross-sectional view of the variable code cylinder lock in an unlocked state.

FIG. 7 is a vertical cross-sectional view of a variable code cylinder lock for explaining an operation of a reset button.

FIG. 8 is a vertical cross-sectional view of the variable code cylinder lock when the initial setting key is rotated 180 degrees.

9 is a sectional view taken along line EE in FIG.

10 is a sectional view taken along line FF in FIG.

FIG. 11 is a cross-sectional view of the variable code cylinder lock with the initial setting key removed.

12 is a sectional view taken along line GG of FIG.

FIG. 13 is a sectional view of the variable code cylinder lock when the secondary key is inserted.

FIG. 14 is a cross-sectional view of the variable code cylinder lock with the secondary key rotated 180 degrees.

FIG. 15 is a sectional view of a variable code type cylinder lock provided with a click mechanism.

16 is a cross-sectional view taken along line HH of FIG. 15 showing the locking angle of the plug.

17 is a cross-sectional view taken along line HH of FIG. 15 showing the unlocking angle of the plug.

FIG. 18 is a longitudinal sectional view of a main part showing a second embodiment of the operating part of the joint pin.

FIG. 19 is a vertical sectional view showing a conventional example of a variable code type cylinder lock.

FIG. 20 is a vertical cross-sectional view illustrating a code conversion operation by a conventional variable code type cylinder lock.

[Explanation of reference numerals] 30 case 35 push pin hole 36 driver pin hole 37 joint pin hole 41 intermediate ring 42 intermediate pin hole 43 opening 45 engaging recess 46 plug 47 key hole 48 tumbler pin hole 49 tumbler accommodating chamber 53 driver pin 55, 55 'Push pin 56 Variable code pin 57 Intermediate pin 58 Tumbler pin 59 Full insertion confirmation tumbler 60 Key insertion hole 61 Engagement protrusion 64 Joint pin 64b Tumbler 65 Engagement protrusion 66 Engagement recess 69 Reset pin 70 Operating part K ₁ Initial setting Key K ₂ Second key

Claims (7)

[Claims] 1. A cylindrically-shaped projection portion is provided on an inner peripheral surface thereof and is long in the axial direction, and a plurality of push pin holes are arranged on the projection portion.
A plurality of driver pin holes are arranged in the axial direction on the inner peripheral surface,
A case provided with a joint pin hole on the rear side, and an intermediate pin hole and a joint pin hole which are inserted into the case so as to be rotatable from a locking angle to an unlocking angle and which coincide with the driver pin hole at the locking angle. An intermediate ring provided with matching openings, a key hole that is rotatably inserted along the inner peripheral surface of the intermediate ring and the tip end surface of the protrusion, and opens in the front surface, and from the key hole to the intermediate pin hole. A plug provided with a matching tumbler pin hole and a tumbler accommodating chamber that communicates with the opening, a variable code pin inserted into the push pin hole, and a plug inserted in the driver pin hole into the intermediate pin hole. A biased driver pin, an intermediate pin having the same length as the intermediate pin hole and inserted into the intermediate pin hole, a tumbler pin inserted into the tumbler pin hole, A push pin that is biased in a direction that pushes the variable cord pin that is inserted into the dynamic pin hole, a tumbler (59) that is accommodated in the tumbler accommodating chamber, and a tumbler that is inserted into the opening of the intermediate ring ( 64b) and a joint pin having an operating portion that is inserted into the joint pin hole and that moves an end surface to a position matching the outer peripheral surface of the plug. 2. A shallow groove for clicking into which the tip of the push pin engages is provided on the outer peripheral surface of the plug when the plug is at a locking angle and an unlocking angle. The variable code type cylinder lock according to claim 1. 3. The operating part of the joint pin comprises a reset pin inserted in the case in parallel with the axial direction of the case, and a recess having an inclined surface is formed in an upper part of the joint pin, and a key is provided. Is completely inserted,
2. The variable cord type cylinder lock according to claim 1, wherein the reset pin is brought into contact with the inclined surface to move the joint pin. 4. The variable cord type cylinder lock according to claim 1, wherein the operating portion of the joint pin comprises a manual operating lever integrally formed with the joint pin. 5. An engaging projection is formed at an end of the tumbler (59), and the engaging projection is engaged with an opening of the intermediate ring or an engaging recess formed at a position facing the opening. The variable code type cylinder lock according to claim 1. 6. The tumbler (59) is a complete insertion confirmation tumbler biased in a direction projecting to the outer periphery of the plug and pushed in the opposite direction by a key, and the tumbler (64b) is The joint pin is engageable with the joint pin, and the joint pin is urged in a direction of pressing against the full insertion confirmation tumbler. When the full insertion confirmation tumbler is pushed by the fully inserted key, the joint pin is pressed. Pin and tumbler (64
The variable cord type cylinder lock according to claim 1, wherein a connecting surface with (b) is located at a position corresponding to an outer peripheral surface of the intermediate ring. 7. The connecting surface between the joint pin and the tumbler (64b) is formed into a curved surface substantially similar to the outer peripheral surface of the intermediate ring, and the engaging projection provided on one end surface is provided on the other end surface. 7. The variable code type cylinder lock according to claim 6, wherein the variable code cylinder lock engages with the engaging recess in a detachable manner.