JPH07180405A - Cylinder lock device - Google Patents

Abstract

PURPOSE:To provide a cylinder lock device that is able to keep off any illegal unlocking as well as to prevent the constituent parts from being damaged, and besides, to provide relatively ease of axial dimensional control over these parts. CONSTITUTION:In the case where a key other than the regular key and a driver or the like are inserted thereinto and rotatively operated, notched recesses of each tumbler 28 will in no case come to a state of being aligned, therefore a movable bar 35 is prevented from shifting in the rear and is not engaged with a rear rotor 42. In consequence, a key rotor 22 merely runs idle together with the movable bar 35, so no excessive force acts on those of constituent parts of the tumblers 28 or the like, and thereby they are protected from being damaged. Since a cam part 41 guiding movements of the movable bar 35 is installed in a rotor case 21, the key rotor 22 and this rotor case 21 are related to the axial dimensional accuracy of this movable bar 35 to some extent, but the rear rotor 42 is not directly related to it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock device which has taken countermeasures against unauthorized unlocking.

[0002]

2. Description of the Related Art For example, in a cylinder lock device provided on a door of an automobile, a plurality of tumblers are movably arranged in a radial direction in a key rotor rotatably provided in a rotor case and are unidirectionally moved by a spring. It is provided so as to be urged to move, and the end portion of the tumbler engages with a lock groove formed in the inner peripheral portion of the rotor case to prevent rotation of the key rotor, thereby locking the key rotor.

For unlocking, when a regular key is inserted into the key insertion hole of the key rotor, each tumbler is moved by the key so as to retract from the lock groove. And
The key is unlocked by rotating the key rotor by rotating the key.

[0004]

By the way, from the past,
In this type of cylinder lock device, damage due to unauthorized unlocking is often seen. That is, by inserting a key other than the regular key, a driver, or the like into the key insertion hole of the key rotor and forcibly rotating it, the end of the tumbler is forcibly pressed into the lock groove of the rotor case and the tumbler or the rotor. The case will be damaged and will be unlocked.

As a countermeasure against such unauthorized unlocking, for example, one disclosed in Japanese Patent Laid-Open No. 4-182582 is known. A schematic configuration of this product will be described with reference to FIGS.

A key rotor 2 rotatably provided in the rotor case 1 has a key insertion hole 3 formed in the axial direction, a plurality of tumbler arrangement grooves 4a formed in the radial direction, and an outer peripheral portion. A guide groove 4b extending in the axial direction is formed in the. A tumbler 5 is movably arranged in each tumbler arrangement groove 4a, and each tumbler 5 is urged to move in one direction by each spring 6.

A cutout recess 5a is formed on the side of each tumbler 5, and the cutout recess 5a of each tumbler 5 is not aligned when no key is inserted.
When the regular key is inserted, the notch recesses 5a are moved so as to be aligned in a line in the axial direction.

A plurality of engaging projections 7 are provided in the guide groove 4b.
A comb-tooth-shaped movable bar 7 having a is arranged so as to be movable, and the movable bar 7 is urged to move rearward (direction of arrow A) by a spring 8. A rear rotor 9 is rotatably provided at a rear portion of the key rotor 2, and a mountain-shaped cam portion 10 and the cam portion 1 are provided at a front portion of the rear rotor 9.
Engagement grooves 11, 11 are formed on both sides of 0. A lock lever (not shown) is attached to the rear rotor 9.
Are connected.

In the above construction, in the state before the key is inserted, the rear end portion 7b of the movable bar 7 is in contact with the top of the cam portion 10, and the movable bar 7 and the rear rotor 9 are not engaged, The key rotor 2 and the rear rotor 9 are in a non-connected state.

When unlocking with a regular key from this state, a regular key (not shown) is inserted into the key insertion hole 3 of the key rotor 2. Then, the tumblers 5 are moved so that the cutout recesses 5a are aligned in a line in the axial direction, whereby the movable bar 7 is allowed to move backward.

When the key rotor 2 is rotated to the left, for example, by the above keys, the movable bar 7 is guided by the cam portion 10 and is moved rearward by the urging force of the spring 8 to engage with the left engaging groove 11. Then, after that, the key rotor 2 and the rear rotor 9 rotate integrally via the movable bar 7. With the rotation of the rear rotor 9, the lock lever rotates to unlock.

On the other hand, in the state shown in FIG. 9, when a key other than a regular key, a driver, or the like is inserted into the key insertion hole 3 and is rotated, the engagement recess 5a of the tumbler 5 is not aligned. Since the engaging protrusion 7a of the movable bar 7 engages with the tumbler 5, the rearward movement of the movable bar 7 is blocked, so that the movable bar 7 is engaged with the engaging groove 11 of the rear rotor 9.
The key rotor 2 and the rear rotor 9 remain in a non-connected state. Therefore, in this case, the key rotor 2 only idles together with the movable bar 7 and is not unlocked.

According to the above structure, even if a key other than the regular key, a driver, or the like is inserted and rotated, the key rotor 2 simply idles, which makes it impossible for the components such as the tumbler 5 to operate. There is an advantage that no strong force acts and they are not damaged.

By the way, in this type of device, it is preferable that the tumbler 5 and the engaging projection 7a of the movable bar 7 do not come into contact with each other in a normal operation. For this purpose, dimensional accuracy in the axial direction of each component is required. In the above configuration, the axial dimensional accuracy of the movable bar 7 is related to the three parts of the rotor case 1, the key rotor 2, and the rear rotor 9, which makes it difficult to manage the dimensions. .

Further, in the above-mentioned structure, the rear rotor 9 is provided with the cam portion 10 for guiding the movement of the movable bar 7 and the engaging groove 11 for engaging with the movable bar 7, and the movable bar 7 is also provided.
In the above, since the portion that abuts on the cam portion 10 and the portion that engages with the engagement groove 11 are the same rear end portion 7b, for example, the engagement margin between the rear end portion 7b of the movable bar 7 and the engagement groove 11 is changed. If this is done, there is a problem that the axial dimension related to the movable bar 7, in particular, the axial dimension relationship between the engagement protrusion 7a of the movable bar 7 and the tumbler 5 changes.

Therefore, an object of the present invention is that even if a key other than a regular key, a driver, or the like is inserted and rotated, the components such as the tumbler are damaged without being applied with an unreasonable force. (EN) Provided is a cylinder lock device which is not easily unlocked, is not unlocked illegally, and is capable of relatively easy dimensional management in the axial direction.

[0017]

SUMMARY OF THE INVENTION A cylinder lock device of the present invention comprises a cylindrical rotor case and a rotor case rotatably provided in the rotor case to form a key insertion hole in the axial direction and a plurality of tumblers. A key rotor having an arrangement groove formed in the radial direction and an axially extending guide groove communicating with the tumbler arrangement groove on the outer peripheral portion, and the key rotor arranged movably in the tumbler arrangement groove in the radial direction. Along with the spring member, the spring members are urged to move in one direction, and the notch recesses are formed on the respective side portions, and the notch recesses are in an unaligned state before the key is inserted. Has a plurality of tumblers that are moved so as to be aligned in a line in the axial direction, and a plurality of engaging convex portions that correspond to the notch concave portions in the axial direction, and the guide groove is between the forward position and the backward position. Axially with It is movably arranged and is urged to move rearward by a spring member, and when the cutout recesses of the tumblers are in a non-aligned state, the engaging projections engage the tumblers to restrict the rearward movement. A movable bar that can move rearward when the cutout recesses are aligned in a row; and the movable bar that is provided in the rotor case and holds the movable bar in the forward position when the key rotor is in the original position. At the same time, the key rotor is provided rotatably at the rear portion of the key rotor having a cam portion for guiding the movable bar to move to the retracted position in response to the rotation of the key rotor from the original position, and an engaging portion. A rear rotor that rotates integrally with the key rotor by engaging the movable bar with the engaging portion when the movable bar is moved from the original position to the retracted position, and is connected to the rear rotor. A lock lever that is, in which the comprises a configuration.

[0018]

In the above structure, in the state before the key is inserted,
The movable bar is held at the forward position by the cam portion provided in the rotor case, the movable bar and the rear rotor are not engaged, and the key rotor and the rear rotor are not connected.

When unlocking with a regular key from this state, the regular key is inserted into the key insertion hole of the key rotor.
Then, the tumblers are moved such that the cutout recesses are aligned in a line in the axial direction, whereby the movable bar is allowed to move backward. When the key rotor is rotated, for example, to the left by the key, the movable bar moves to the retracted position by the biasing force of the spring while being guided by the cam portion and engages with the engaging portion of the rear rotor. The rear rotor and the rear rotor can rotate integrally via the movable bar. With the rotation of the rear rotor, the lock lever can be rotated and unlocked.

On the other hand, when a key other than a regular key or a driver is inserted into the key insertion hole and is rotated,
The notched recesses of each tumbler are not aligned, and the engaging protrusions of the movable bar engage the tumbler to prevent the movable bar from moving rearward. The key rotor and the rear rotor do not engage with each other and remain in a non-connected state. Therefore, in this case, since the key rotor only idles together with the movable bar, the component parts such as the tumbler are not damaged due to unreasonable force, and are not unlocked illegally. .

In the above structure, since the rotor case is provided with the cam portion for guiding the movement of the movable bar, the two parts of the rotor case and the key rotor are related to the axial dimensional accuracy of the movable bar. However, the rear rotor is not directly involved. Further, since the portion of the movable bar that abuts on the cam portion and the portion that engages with the engagement portion of the rear rotor are different portions, even if the engagement margin between the movable bar and the engagement portion is changed, for example, The dimensional relationship between the engagement protrusion of the movable bar and the tumbler does not change.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, in FIG. 1, a rotor case 21 has a cylindrical shape, and a key rotor 22 is provided inside.
Are rotatably arranged. A step portion 23 is formed on the inner peripheral portion of the rear portion of the rotor case 21.
This restricts the rearward movement of the key rotor 22.

A key insertion hole 24 extending in the axial direction is formed in the central portion of the key rotor 22, a plurality of tumbler arrangement grooves 25 extending in the radial direction are formed side by side at equal intervals in the axial direction, and the tumbler arrangement is performed. A positioning tumbler arranging groove 26 extending in the same direction as the tumbler arranging groove 25 is formed behind the groove 25, and a guide groove 27 extending in the axial direction is formed on the outer peripheral portion so as to communicate with each tumbler arranging groove 25. ing.

As shown in FIG. 2, a tumbler 28 is arranged in each tumbler arrangement groove 25 so as to be movable in the radial direction. Each tumbler 28 is connected to one side and the other side in the radial direction by each spring member 29. The movement is urged to alternate with the side. Also,
A cutout recess 30 is formed on the side of each tumbler 28. In each tumbler 28, the cutout recesses 30 are in a misaligned state before the key is inserted into the key insertion hole 24, and when the regular key is inserted into the key insertion hole 24, the cutout recesses 30 are removed. It is configured to be moved so as to be aligned in a line in the axial direction.

Further, as shown in FIG. 4, a positioning tumbler 31 is disposed in the positioning tumbler arrangement groove 26 so as to be movable in the radial direction, and the positioning tumbler 31 is also radially moved by the spring member 32. It is urged to move to one side. A trapezoidal protrusion 33 is provided at one end of the positioning tumbler 31, and the protrusion 33 is fitted into a recess 34 formed in the inner peripheral portion of the rotor case 21. It is designed to be held in the original position shown in FIG.

A movable bar 35 extending in the axial direction is disposed in the guide groove 27 of the key rotor 22 so as to be movable in the axial direction. The movable bar 35 is moved backward (in the direction of arrow B) by a spring member 36. It is urged to move. Movable bar 35
The engaging convex portion 37 is formed on the side surface on the tumbler 28 side corresponding to each tumbler 28, and the convex portion 38 projecting to the side opposite to the engaging convex portion 37 side is formed on the front portion. A convex portion 39 is provided on the rear portion so as to project rearward.

As shown in FIGS. 3 and 5, a cam portion 41 having a mountain-shaped cam convex portion 40 protruding forward is formed on the inner peripheral portion on the front side of the rotor case 21,
The convex portion 38 on the front side of the movable bar 35 is in contact with the cam portion 41 from the front. The left and right sides of the cam protrusion 40 are sloped 40
It is a.

At the rear portion of the key rotor 22, a shaft portion 22a having a smaller diameter than the other portions is provided so as to project rearward, and a cylindrical rear rotor 42 is rotatably provided at the outer peripheral portion of the shaft portion 22a. Has been. As shown in FIG. 6, an engaging recess 43 as an engaging portion is formed in the front portion of the peripheral wall portion of the rear rotor 42. A lock lever 44 is connected to the rear rotor 42. The rear rotor 42 and the lock lever 44 are urged by a return spring 45 so as to return to the original position.

Next, the operation of the above configuration will be described. In the state of FIG. 1 before the key is inserted, the convex portion 3 of the positioning tumbler 31
3 is fitted in the recess 34 of the rotor case 21, the key rotor 22 is held in its original position, and the movable bar 3
Reference numeral 5 is held at the forward position by the top of the cam convex portion 40 provided on the rotor case 21. In this state, the convex portion 39 on the rear portion of the movable bar 35 and the engagement concave portion 43 of the rear rotor 42 are not engaged, and the key rotor 22 and the rear rotor 42 are not connected.

When unlocking from this state with a regular key, the regular key 46 is replaced with the key rotor 2 as shown in FIG.
The second key insertion hole 24 is inserted. Then each tumbler 2
The key 8 is moved by the key 46 so that the cutout recesses 30 are aligned in a line in the axial direction, whereby the movable bar 35 is allowed to move backward. At this time, the positioning tumbler 31 is also moved by the key 46 so as to be housed in the positioning tumbler placement groove 26, and the convex portion 33 is retracted from the concave portion 34.

The key rotor 2 is pressed by the key 46.
When 2, for example, is rotated to the left, the movable bar 35 is moved to the retracted position (in the direction of arrow B) by the biasing force of the spring member 36 while being guided by the cam portion 41 (see the chain double-dashed line in FIG. 5). As shown in FIG. 8, the convex portion 3 at the rear of the movable bar 35
9 engages with the engaging recess 43 of the rear rotor 42, and thereafter, the key rotor 22 and the rear rotor 42 rotate integrally via the movable bar 35. With the rotation of the rear rotor 42, the lock lever 44 can be rotated and unlocked.

After that, when the rotational operation force to the left by the key 46 is released, the lock lever 44, the rear rotor 42, and the key rotor 22 are returned and rotated in the original position direction by the urging force of the return spring 45, and the key is further moved. The key rotor 22 is slightly rotated to the right by 46 to return the key rotor 22 to the original position. Then, the convex portion 38 of the front portion of the movable bar 35 is pressed forward by the inclined surface 40 a of the cam convex portion 40, so that the movable bar 35 moves to the original forward position and the engagement between the movable bar 35 and the rear rotor 42. It is out of sync.

Then, when the key 46 is removed, the convex portion 33 of the positioning tumbler 31 is fitted into the concave portion 34 so that the key rotor 22 is held in the original position, and each tumbler 28 has the notched concave portion 30. Moved to be in a misaligned state.

On the other hand, in the state of FIG. 1, when a key other than a regular key, a driver, or the like is inserted into the key insertion hole 24 and rotated, the cutout recesses 30 of the tumblers 28 are not aligned. However, since the engaging protrusion 37 of the movable bar 35 engages with the side portion of the tumbler 28, the rearward movement of the movable bar 35 is blocked. The key rotor 22 and the rear rotor 42 do not engage with the engaging recess 43 of FIG.

Therefore, in this case, since the key rotor 22 only idles together with the movable bar 35, the components such as the tumbler 28 are not damaged due to an unreasonable force, and the key rotor 22 is not correctly understood. It will not be locked.

However, in such a structure, it is preferable that the tumblers 28 and the engaging projections 37 of the movable bar 35 do not come into contact with each other in a normal operation. For this purpose, dimensional accuracy in the axial direction of each component is required.

In the embodiment described above, the movable bar 35
Since the cam portion 41 that guides the movement of the rotor case 21 is provided in the rotor case 21, the dimensional accuracy of the movable bar 35 in the axial direction is related to the two parts of the rotor case 21 and the key rotor 22, but the rear rotor 42 is not directly connected. It doesn't matter. Therefore, as compared with the conventional one in which the cam portion is provided on the rear rotor, there is an advantage that axial dimension management can be relatively easy.

Further, in the movable bar 35, the front-side convex portion 38 that abuts on the cam portion 40 and the rear-side convex portion 39 that engages with the engaging concave portion 43 of the rear rotor 42 are different parts, For example, even if the engagement allowance between the convex portion 39 and the engaging concave portion 43 is changed, the engaging convex portion 37 of the movable bar 35 and the tumbler 2 are changed.
The dimensional relationship with 8 does not change directly, and there is also an advantage that the engagement margin between the protrusion 39 and the engagement recess 43 can be set relatively freely.

[0039]

As is apparent from the above description, according to the present invention, even if a key other than a regular key, a driver, or the like is inserted and rotated, the key rotor simply idles together with the movable bar. Therefore, it is possible to prevent an unreasonable force from acting on the components such as the tumbler, prevent them from being damaged, and reliably prevent unauthorized unlocking.

Further, since the rotor case is provided with the cam portion for guiding the movement of the movable bar, the dimensional accuracy in the axial direction of the movable bar is related to the rotor case and the key rotor, but is not directly related to the rear rotor. In addition, since the portion of the movable bar that abuts on the cam portion and the portion that engages with the engagement portion of the rear rotor are different portions, it is possible to change the engagement margin between the movable bar and the engagement portion, for example. However, there is an advantage that the dimensional relationship between the engaging convex portion of the movable bar and the tumbler does not change, and the dimensional management in the axial direction can be relatively easily performed as a whole.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view taken along the line EE in FIG.

FIG. 3 is a vertical sectional view taken along the line of FIG.

FIG. 4 is a vertical sectional view taken along the line of FIG.

FIG. 5 is a plan view showing a developed cam portion.

FIG. 6 is a perspective view of a rear rotor.

FIG. 7 is a diagram corresponding to FIG. 3 with a regular key inserted.

FIG. 8 is a view corresponding to FIG. 1 in a state where the movable bar is moved to the retracted position.

9 is a view corresponding to FIG. 1 showing a conventional configuration.

FIG. 10 is a vertical cross-sectional view taken along the line II in FIG.

FIG. 11 is a perspective view of a rear rotor.

[Explanation of symbols]

21 is a rotor case, 22 is a key rotor, 24 is a key insertion hole, 25 is a tumbler arrangement groove, 27 is a guide groove, 28 is a tumbler, 29 is a spring member, 30 is a notched recess, 35 is a movable bar, 36 is a spring member, 37 is an engaging convex portion, 40 is a cam convex portion, 41 is a cam portion, 42 is a rear rotor, 43 is an engaging concave portion (engaging portion), 44 is a lock lever, and 46 is a key.

Claims (1)

[Claims] 1. A cylindrical rotor case, rotatably provided in the rotor case, axially forming a key insertion hole and radially forming a plurality of tumbler arrangement grooves, and an outer peripheral portion. A key rotor having a guide groove extending in the axial direction communicating with the tumbler arrangement groove, and a key rotor movably arranged in each of the tumbler arrangement grooves and urged to move in one direction by a spring member, In addition, the notch recesses are formed on the respective side portions, and the notch recesses are in an unaligned state before the key is inserted, and the notch recesses are moved so as to be aligned in a line in the axial direction by inserting a regular key. A plurality of tumblers, and a plurality of engaging protrusions corresponding to the cutout recesses in the axial direction, and are arranged in the guide groove so as to be movable in the axial direction between an advancing position and a retracting position. , By spring member When the cutout recesses of the tumblers are not aligned, the engaging protrusions engage the tumbler to restrict rearward movement, and the cutout recesses are aligned in a line. And a movable bar that can move rearward when the key rotor is in the original position, the movable bar is held at the forward position and the key rotor is rotated from the original position. In accordance with the above, the movable bar is provided at the rear portion of the key rotor rotatably with a cam portion for guiding the movable bar to move to the retracted position, and the key rotor is rotated from the original position to retract the movable bar. A rear rotor that is rotated integrally with the key rotor by engaging the movable bar with the engaging portion when moving to a position; and a lock lever connected to the rear rotor. Linda lock device.