JP2608032B2 - Cylinder lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock used for locking and unlocking doors and entrances of automobiles.

[0002]

2. Description of the Related Art A cylinder lock, which is widely used for an automobile door, a key switch section, a building door, or the like, has a rotatable rotor in a holder and holds a plurality of tumblers in the rotor. When the key is removed, the tumbler is projected into the groove on the inner peripheral surface of the holder to disable the rotation of the rotor, and when the key is inserted, the tumbler is immersed in the rotor so that the rotor can be rotated. It is configured.

FIGS. 5 to 8 show a conventional cylinder lock, in which a rotor 2 is rotatably accommodated in a holder 1, and a spring 4 is provided in a key groove 3 of the rotor 2 by a spring 4. A tumbler 5 urged in a direction protruding outward from the outer peripheral surface 2a of the second member 2 is slidably accommodated therein. When the key 6 is removed, the lock portion 5b of the tumbler 5 is moved from the outer peripheral surface 2a of the rotor 2 to the holder 1 at a position where the contact portion 5a of the tumbler 5 contacts the inner peripheral surface 1a of the holder 1.
Projecting into the groove 1b. The amount of protrusion at this time is regulated by the contact portion 5a of the tumbler 5 coming into contact with the inner peripheral surface 1a of the holder 1.
Are all the same, the protrusion amounts are the same. On the other hand, as shown in FIGS. 7 and 8, the key insertion holes 5c are provided not at the same position but at positions corresponding to the heights of the corresponding key peaks. The hole 5c is pushed by the key crest 6a of the key 6, and the tumbler 5 moves so that the tip of the lock portion 5b enters the outer peripheral surface 2a of the rotor 2.

FIG. 5 is a view showing the position of the tumbler 5 when the key 6 is removed. The tumblers 5 are alternately arranged in the rotor 2 in the opposite direction. When the key 6 is removed, the tumblers 5 projecting in the same direction move to the same position, and the position of the key insertion hole 5c corresponds to the key peak 6a. Also, as shown in FIG.
Is inserted, all the tumblers 5 are pushed by the corresponding key peaks 6a, and each of them moves to a position where the lock portion 5b does not protrude. is there.

[0005]

In the cylinder lock having the above-described structure, for example, the rotor 2 is rotated clockwise from the state shown in FIG.
There is a possibility that the rotor 2 can be rotated by so-called picking means for pushing down the lock portion 5b against the end portion 1c of the inner peripheral surface 1a of the holder 1 on the groove 1b side against the biasing force of the holder 1, thereby lowering safety. It was a factor to make it.

[0006] The present invention has been made in view of the above problems, and has as its object to provide a cylinder lock with improved safety against picking.

[0007]

[Means for Solving the Problems] The cylinder lock of the present invention comprises:
A plurality of tumblers urged in a direction protruding from the outer periphery of the rotor and slidably inserted into the grooves of the rotor are provided. In the cylinder lock, which protrudes to disable the rotation of the rotor and is immersed in the rotor when the key is inserted to enable the rotation of the rotor, the cylinder lock projects into each of the vertical grooves of the holder. Form a part,
A concave portion is formed at the top and bottom of the tumbler. The concave portion is formed so as to be trapezoidal, and the concave portion is inclined so that a side is widened outward.

[0008]

When the tumbler is pushed down while the rotor is urged in the rotating direction using a jig or the like, the lower trapezoidal concave portion engages with the convex portion in the lower groove of the holder, In order to return the rotor to the center position, the rotation range is restricted, and since the concave side of the upper tumbler is inclined so as to spread outward, the tip of the tumbler cannot ride on the convex. , The rotor does not rotate.

[0009]

1 to 4 show an embodiment of the present invention. FIG. 1 is a sectional view taken along line AA of FIG. 3, FIG. 2 is a sectional view taken along line BB of FIG. 3, and FIG. FIG. 4 is a front sectional view showing a state where the key is inserted, and the same reference numerals are given to the same parts.

In FIGS. 1 to 4, reference numeral 8 denotes a tumbler. In this embodiment, a rotatable rotor 2 is housed in a holder 7, and a plurality of tumblers 8 are held in the rotor 2. ing. The tumbler 8 is accommodated in a keyway 3 formed in the rotor 2 in a diametrical direction. The tumbler 8 is supported by a spring 4 inserted between a convex piece 8a protruding from a side 9 and a step 2b of the rotor 2. Are urged in a direction to protrude outward from the outer peripheral surface 2a. When the key 6 is removed, the lock portion 8b of the tumbler 8 projects into the grooves 7a formed at two opposite positions of the holder 7.

A convex portion 7b is provided in the groove 7a of the holder 7, and the convex portion 7b is inclined so that its height gradually increases from the front to the back of the key insertion opening 2c. . The convex portion 7b is provided with a concave portion 8c of the tumbler 8 described later,
The side corresponding to the side 9 of 8d is not inclined.

On the other hand, the upper and lower ends of the tumbler 8 are
The trapezoidal concave portions 8c and 8d are formed, and the side 9 of the concave portions 8c and 8d is inclined so as to spread outward. The concave portions 8c and 8d are formed at positions facing the convex portion 7b so as to be disengageable from the convex portion 7b, that is, at the central portion of the lock portion 8b and on the opposite side. Also, the recesses 8c, 8
The depth d differs depending on each tumbler 8 (see FIGS. 1 and 2). The concave portions 8c and 8d and the convex portion 7b
It is also conceivable to make the tumbler into a triangular shape. However, when the triangular shape is used, the top portion comes into contact with the tumbler and is liable to be worn, so that the tumbler can easily ride on. Further, if the projection 7b is formed in a shape other than the triangle, the triangle of the tumbler must be enlarged, and if it is enlarged, there is a problem that the top of the triangle and the key insertion hole overlap.

If the tumbler 8 projects into the groove 7a, the concave portion 8c
Is made to contact the tip of the projection 7b, and the projection 7b contacts the bottom of the recess 8c before the tumbler 8 contacts the bottom of the groove 7a of the holder 7. For this reason, a gap is formed between the tumbler 8 and the bottom surface of the groove 7a. However, the gap is different in each tumbler 8 and is arranged irrespective of the key peak 6a. Therefore, even if the positional relationship of the tumblers 8 is compared with an endoscope or the like, they do not correspond to the difference in the height of the key ridges 6a, and the shape of the key ridges 6a cannot be read. In addition, since the convex portion 7b is formed to be inclined so as to gradually change, the tumbler 8 is arranged at a more complicated position, and it is more difficult to read the shape of the key peak 6a.

Further, even if the tumbler 8 is moved by inserting a wire or the like from the key insertion opening 2c and pressing the edge 8f of the key insertion hole 8e of the tumbler 8, the tumbler 8 is similarly moved to the groove of the holder 7 as described above. Since the projection 7b abuts on the bottom of the recess 8d before abutment on the bottom of the key 7a, the key hill 6 can be obtained by comparing the amount of movement of the tumbler 8 and the positional relationship of the abutted positions.
The shape of a cannot be read.

When picking using a jig or the like, one of the tumblers 8 is pushed down while the rotor 2 is urged in the clockwise direction. And the concave portion 8d on one side of the tumbler 8 is engaged with the convex portion 7b in the groove 7a of the holder 7 along the inclined side 9 to return the rotor 2 to the neutral position. The tip of the lock portion 8b of the tumbler 8 cannot ride on the inner peripheral surface of the holder 7. Further, since the side edges 9 of the concave portions 8c and 8d of the tumbler 8 are formed so as to expand outward, the distal end portion of the lock portion 8b cannot ride on the distal end portion of the convex portion 7b. 2 cannot be rotated.

According to this embodiment, the convex portion 7b is formed in the groove 7a of the holder 7, and the concave portions 8c, 8 which can be disengaged from the convex portion 7b.
d is formed in the tumbler 8, and the concave portions 8c and 8d are inclined so that the sides 9 are widened outward so as to have a trapezoidal shape. It is not possible to ride on the tip, and it is possible to improve the safety against picking. Further, the sides 9 of the concave portions 8c and 8d of the tumbler 8 are inclined so as to spread outward, but the side surfaces of the convex portions 7b in the grooves 7a of the holder 7 are not inclined. Even when the tumbler is rotated, the tumbler is hard to move and does not ride on the convex portion 7b.

[0017]

The cylinder lock according to the present invention comprises a plurality of tumblers which are urged in a direction protruding from the outer periphery of the rotor and are slidably inserted into grooves of the rotor. A cylinder lock, which protrudes into a groove formed in a vertical direction from an outer periphery of a rotor to disable rotation of the rotor and immerses in the rotor when a key is inserted to enable rotation of the rotor. A convex portion is formed in each groove in the vertical direction of the holder, and a concave portion that can be engaged with and disengaged from the convex portion is formed above and below the tumbler. It is characterized in that it is inclined so that it spreads out even if the tumbler is pushed down while the rotor is urged in the rotational direction using a jig or the like, the lower trapezoidal concave portion is under the holder. Engaged with the protrusion in the side groove In order to return the rotor to the neutral position, the rotation range is restricted, and the concave side of the upper tumbler is inclined so as to spread outward, so that the tip of the tumbler cannot ride on the convex portion. In addition, it is possible to improve the security against picking. In addition, since the concave portion is formed in a trapezoidal shape, the shape of the convex portion in the groove can be given a degree of freedom.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an embodiment of the present invention, and is a cross-sectional view taken along line AA of FIG. 3;

FIG. 2 is a view illustrating an embodiment of the present invention, and is a cross-sectional view taken along line BB of FIG. 3;

FIG. 3 is a front sectional view of an embodiment of the present invention.

FIG. 4 is a front sectional view showing a state where a key according to the embodiment of the present invention is inserted.

FIG. 5 is a front sectional view of a conventional cylinder lock.

FIG. 6 is a front sectional view showing a state where a key of a conventional cylinder lock is inserted.

FIG. 7 is a sectional view taken along the line CC of FIG. 6;

8 is a sectional view taken along line DD of FIG. 6;

[Explanation of symbols]

 1, 7 ... Holder 2 ... Rotor 5, 8 ... Tumbler 6 ... Key 7a ... Groove 7b ... Protrusion 8c, 8d ... Recess 9 ... Side

Claims (1)

(57) [Claims] A plurality of tumblers which are urged in a direction protruding from the outer periphery of the rotor and slidably inserted into grooves of the rotor, wherein the tumblers are formed in a vertical direction from the outer periphery of the rotor when the key is removed. A cylinder lock protruding into the groove formed so as to disable the rotation of the rotor and immersed in the rotor when the key is inserted to enable the rotation of the rotor. A convex portion is formed in each groove, and a concave portion that can be engaged and disengaged from the convex portion is formed above and below the tumbler, and the concave portion is inclined so that the sides expand outward to form a trapezoid. A cylinder lock characterized by the following.