JP2004324293A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock miniaturized even when a motor is used as a driving source. <P>SOLUTION: The cylinder lock is composed of a plug 2 rotatably inserted into a cylinder case 1, a worm 4 driven around a rotating shaft along the longitudinal direction of the plug 2 by the motor 3 arranged along the longitudinal direction of the plug 2, a power transmission spring 6, which is formed of a material having a resiliency and rocked freely around the center of a rocking directed in the orthogonal direction to the rotating shaft of the worm 4 and in which one end has an engaging leg section 5 elastically deflected and engaged with the worm 4 under a press-contacted state, and a lock bar 7 being connected at the other end of the spring 6, being projected and driven in the plug 2 from the case 1 and controlling the rotation of the plug 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cylinder lock.
[0002]
[Prior art]
2. Description of the Related Art As a cylinder lock that drives a lock body that regulates rotation of a plug of a cylinder lock by a motor, one described in Patent Literature 1 is known.
[0003]
In this conventional example, a through-hole is formed in a rotating part (plug) and a fixed part (plug case) in which the plug is housed, and a restraining element (locking body) is inserted. The locking body is movable in the hole, and the tip is inserted into the hole on the plug side to prevent rotation of the plug.
[0004]
The collar fixed to the plug case is provided with a lever having one end supported on an appropriate fulcrum and the other end engaged with a worm fixed to the motor. A locking body is connected to the center of the lever in the longitudinal direction, and when the motor is rotated, the lever tilts around the fulcrum to drive the locking body.
[0005]
[Patent Document 1]
JP 2001-506334 A [0006]
[Problems to be solved by the invention]
However, in the above-described conventional example, the motor and the worm are used to hold the lever in a state in which both ends are supported by the worm and the fulcrum, and to make the driving direction of the lever by the worm directly coincide with the operating direction of the locking body. However, there is a problem in that it is necessary to arrange the plug in a direction orthogonal to the plug, a large space is required for mounting, and miniaturization is difficult.
[0007]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described drawbacks, and has as its object to provide a cylinder lock that can be downsized even when a motor is used as a drive source.
[0008]
[Means for Solving the Problems]
According to the invention, the object is
A plug 2 rotatably inserted into a cylinder case 1;
A worm 4 driven around a rotation axis along the longitudinal direction of the plug 2 by a motor 3 arranged along the longitudinal direction of the plug 2;
A meshing leg formed of a material having a spring property, which is swingable around a swing center which is orthogonal to the rotation axis of the worm 4, elastically bent at one end and meshes with the worm 4 in a pressure-contact state. A power transmission spring 6 with 5;
This is achieved by providing a cylinder lock having a lock bar 7 that is connected to the other end of the power transmission spring 6 and protrudes from the cylinder case 1 into the plug 2 to regulate the rotation of the plug 2.
[0009]
The cylinder lock is formed by rotatably inserting a plug 2 into a cylinder case 1, and in order to regulate the relative rotation of the plug 2 with respect to the cylinder case 1 and create a locked state, the cylinder case 1 is directed toward the plug 2 from the cylinder case 1 side. A lock bar 7 that moves forward and backward is arranged.
[0010]
In order to drive the lock bar 7, a worm 4 rotationally driven by the motor 3 and a power transmission spring 6 for converting the rotational movement of the worm 4 into the forward / backward movement of the lock bar 7 are arranged. When the worm 4 rotates, the power transmission spring 6 moves around the center of the swing which is orthogonal to the worm 4 because the meshing leg 5 with the worm 4 moves in the rotation axis direction of the worm 4. The rock bar 7 swings and the lock bar 7 connected to the other end is driven.
[0011]
In the present invention in which components such as the motor 3 and the worm 4 whose longitudinal dimension is larger than the dimension in the orthogonal direction are arranged along the longitudinal direction of the cylinder case 1 which also has a larger longitudinal dimension, It is possible to prevent the size of the device from being increased due to the accommodation of the device, and to make the device as small as possible.
[0012]
In addition, by disposing the worm 4 in the longitudinal direction of the plug 2, the moving direction of the worm 4 and the lock bar 7 has a substantially orthogonal positional relationship, and generally requires a complicated direction changing mechanism. The size of the device is reduced by adopting a simple structure in which one end of a power transmission spring 6 whose swing center is orthogonal to the worm 4 is engaged with the worm 4 and the other end is connected to the lock bar 7. Is achieved.
[0013]
Further, since the power transmission spring 6 is formed of a material having a spring property, the power transmission spring 6 transmits the rotational force of the motor 3 while flexing in a direction corresponding to the rotational direction of the worm 4. As a result, since the meshing leg 5 is almost in pressure contact with the worm 4, the meshing leg 5 does not drop off from the worm 4, and high operational reliability can be secured.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, the cylinder lock is formed by rotatably inserting a plug 2 into a cylinder case 1. A drive pin 10 and a tumbler pin 11 are inserted into the cylinder case 1 and the plug 2 movably in the radial direction, and are urged in the center direction by a compression spring 12 arranged on the cylinder case 1 side.
[0015]
The drive pin 10 and the tumbler pin 11 are arranged linearly in the initial rotation posture of the plug 2 shown in FIG. 1B, and the tip of the tumbler pin 11 is inserted into a key insertion groove 2 a formed in the longitudinal direction of the plug 2. Protrude. In this state, the boundary between the drive pin 10 and the tumbler pin 11 is displaced from the rotational boundary of the plug 2 with respect to the cylinder case 1, and the plug 2 cannot be rotated relative to the cylinder case 1 (locked state).
[0016]
When an unlocking key (not shown) provided with a genuine unlocking code is inserted into the key insertion groove 2a in the locked state, the tumbler pin 11 is pushed outward by the unlocking key, and the boundary with the drive pin 10 is connected to the plug 2. , The rotation operation to the plug 2 is allowed (unlocked state).
[0017]
The cylinder lock has an unlocking state formed by an appropriate electric unlocking signal in addition to the locking and unlocking state formed by the tumbler pin 11 described above. Only when both of the electric unlocking signals transmitted to the receivers are independently authentic, the state shifts to the substantial unlocking state, and the rotation operation to the plug 2 is allowed.
[0018]
In this embodiment, an RF-ID (Radio Frequency IDentification) tag embedded in an unlocking key for operating the tumbler pin 11 is used as a means for transmitting an electric unlocking signal. -A coil 1a for communicating with the ID is fixed on the mounting board 1b.
[0019]
As shown in FIG. 2, the electric lock portion driven when the electric unlock signal is genuine is directed to the cylinder case in the longitudinal direction of the plug 2, that is, the longitudinal direction parallel to the insertion direction of the unlock key. 1, a motor 3, a worm 4, and a lock bar 7 are provided. Although the worm 4 is directly fixed to the drive shaft of the motor 3 in FIG. 2, the worm 4 may be configured to indirectly transmit the rotational power of the drive shaft via an appropriate gear train.
[0020]
The lock bar 7 is accommodated in the cylinder case 1 movably in the direction of the rotation center of the plug 2. The lock bar 7 faces the bar receiving portion 2b formed on the plug 2 when the plug 2 is in the initial rotation position.
[0021]
In order to drive the lock bar 7 using the motor 3 as an actuator, a power transmission spring 6 is disposed in the cylinder case 1. The power transmission spring 6 has a coil portion 8 formed by a coil spring having a relatively small number of turns of about 4 to 10 turns, and legs extending from the coil portion 8 are bent in the direction of the center axis of the coil portion 8, One is a meshing leg 5.
[0022]
The power transmission spring 6 formed as described above is arranged such that the central axis of the coil portion 8 is oriented at right angles to the rotation center of the worm 4. A recess 9 is formed in the cylinder case 1 to hold the power transmission spring 6 in a predetermined posture without using a central shaft member for regulating the posture by inserting the coil portion 8, and the power transmission spring 6 The part 8 is held in a predetermined posture with the part 8 placed on the concave part 9.
[0023]
In the mounted state, the meshing leg 5 of the power transmission spring 6 abuts against the side wall surface of the spiral tooth of the worm 4 as shown in FIGS. 1A and 2, and the meshing leg 5 abuts the front end of the worm 4. When the other leg 6a of the power transmission spring 6 is inserted into the spring insertion hole 7a formed in the lock bar 7 in this state, the lock bar 7 protrudes toward the plug 2 as shown in FIG. It is driven to the stroke end position. In this state, the lock bar 7 is in a state of being inserted into the bar receiving portion 2b of the plug 2, and is in a locked state in which the rotation operation to the plug 2 is prohibited.
[0024]
In this state, when the motor 3 is driven to rotate the worm 4 in the unlocking direction, as shown in FIG. 3, the meshing leg 5 is pulled toward the motor 3 side end of the worm 4, and as a result, the power A torque is applied to the transmission spring 6 in a direction to reduce the diameter of the coil portion 8, and the lock bar 7 retreats from the bar receiving portion 2 b of the plug 2. This state is an unlocked state in which the rotation operation to the plug 2 is allowed. Thus, the lock bar 7 can be driven between the locked position and the unlocked position depending on the rotational driving direction of the motor 3. Since the bar receiving portion 2b is formed so as to directly face the lock bar 7 only at the initial rotation position of the plug 2, once the plug 2 is rotated, the plug 2 is not erroneously locked and a smooth rotation operation is performed. Is guaranteed.
[0025]
Even if the motor 3 is rotated in the locking direction in the locked state or in the unlocking direction in the unlocked state, the engagement leg 5 does not move in the axial direction of the worm 4. Does not occur, and no excessive load is applied to the motor 3.
[0026]
Therefore, in this embodiment, when the cylinder lock is in the locked state, as shown in FIG. 1, both the tumbler pin 11 and the lock bar 7 are in the locked state. It is necessary to shift the part and the tumbler pin 11 to the unlocked state at the same time. As a result, for example, even if the tumbler pin 11 is illegally operated by picking or the like to shift to the unlocked state, the plug 2 cannot be rotated because the lock bar 7 is still in the locked state. Is dramatically improved.
[0027]
Further, when the lock signal is transmitted to the electric lock portion while the plug 2 is rotated from the initial rotation position and the motor 3 is driven, the coil portion 8 of the power transmission spring 6 bends and the worm In order to absorb the shift between the position above the lock bar 7 and the lock bar 7, no excessive load is applied to the motor 3, and when the plug 2 returns to the initial rotation position in this state, the power transmission spring 6 The lock bar 7 falls into the bar receiving portion 2b due to the elastic restoring force of, and can shift to the locked state.
[0028]
In the above, the cylinder lock provided with both the locking / unlocking means using the tumbler pin 11 and the electric lock portion has been described. However, the cylinder lock can be constituted only by the electric lock portion.
[0029]
【The invention's effect】
As is apparent from the above description, according to the present invention, a cylinder lock that can be downsized can be obtained even when a motor is incorporated as a drive source.
[Brief description of the drawings]
1A and 1B are diagrams showing the present invention, wherein FIG. 1A is a longitudinal sectional view, and FIG. 1B is a sectional view taken along line 1B-1B of FIG.
FIG. 2 is an explanatory perspective view showing a main part of FIG. 1;
3A and 3B are views showing an unlocked state, wherein FIG. 3A is a longitudinal sectional view, and FIG. 3B is a perspective explanatory view showing a main part of FIG.
[Explanation of symbols]
Reference Signs List 1 cylinder case 2 plug 3 motor 4 worm 5 meshing leg 6 power transmission spring 7 lock bar 8 coil 9 recess

Claims (3)

A plug rotatably inserted into the cylinder case,
A worm driven around a rotation axis along the longitudinal direction of the plug by a motor arranged along the longitudinal direction of the plug;
It is formed of a material having a spring property, and is provided with a meshing leg portion that is swingable around a swing center oriented in a direction perpendicular to the rotation axis of the worm, and is elastically bent at one end and meshes with the worm in a pressure-contact state. Power transmission spring,
A cylinder lock having a lock bar connected to the other end of the power transmission spring and driven to protrude from the cylinder case into the plug to restrict rotation of the plug. 2. The cylinder lock according to claim 1, wherein the power transmission spring is a coil spring having one leg extending from the coil portion bent in an orthogonal direction to form a meshing leg, and the other end connected to a lock bar. . The cylinder lock according to claim 2, wherein the power transmission spring has a coil portion mounted and held in a concave portion formed in the cylinder case.

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