JPS628586B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a knob lock provided on an opening/closing lid of a glow box or the like in a driver's seat of an automobile. As a conventional lock structure, for example, there is a structure as disclosed in US Pat. No. 3,003,348, in which the locking member is released from the lid by pressing the cylinder part with a finger to open the lid and lock the lid. The structure was such that it could be locked via the

However, the above conventional structure had the problem that it was difficult to open and difficult to operate.

In conventional knob locks of this kind, when the knob is operated during locking, the operating force is applied to the rotor each time and is applied to the plate tumbler that protrudes from the rotor and engages with the cylinder lock body. The problem is that the plate tumbler is twisted each time it is operated, and eventually the plate tumbler wears out and no longer functions as a cylinder lock.

The present invention has been made in view of the drawbacks of the prior art, and is designed to prevent the operating force of the knob from reaching the rotor when the lock is locked.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a cylinder lock body, which has a rotor 2 therein. As is well known, the rotor 2 has a key insertion hole 2a oriented in the axial direction, and a plate tumbler 2b protruding from the circumferential surface in the vertical direction.

In the rotation locus partial space 1s of the plate tumbler 2b in the cylinder lock body 1, rotation restraining protrusions 1a and rotation permitting spaces 1b are formed to alternately face each other, and as shown in FIG. Since the rotation restraining protrusion 1a is located in contact with the clock hand rotation direction side, insert the key and press the plate tumbler 2.
Rotor 2b unless b is drawn into rotor 2.
It is impossible to rotate the lock in the clockwise direction.

On the other hand, on the counterclockwise rotation direction side of the plate tumbler 2b, the wide rotation allowance space 1b is continuous, so the rotor 2 can be moved left and right on the front side of the cylinder lock body 1 without using a key. By pressing both the knobs 3, which are provided so as to be slidable in this direction, inwardly, it is possible to rotate the knobs 3 in the counterclockwise direction for unlocking.

That is, a driven protrusion 2c is formed to protrude upward at the front end of the rotor 2, and a pair of opposing knobs 3, 3, which are always urged outward by a coil spring 4, are pushed inward. The driving arm portion 3a abuts against the driven protrusion 2c to rotate the rotor 2 counterclockwise.

On the other hand, when the plate tumbler 2b is rotated clockwise by operating the key with the key so that the plate tumbler 2b overcomes the rotation restraining protrusion 1a, the driven protrusion 2c of the rotor 2 Since it is located at the three-dot chain line position in Fig. 2 and is removed from the drive arm portion 3a, the rotor 2 will not be driven even if the knob 3 is pushed in.

A locking protrusion 5a is provided on the back side of the cylinder lock body 1.
A pair of locking members 5, 5 with the locking members 5a protruding outward are provided in such a state that they are constantly biased outward by a coil spring 6 provided between the two locking members 5, 5. are provided with driven protrusions 5b, 5b, and a driving portion 2d provided to protrude rearward of the rotor 2 is engaged with the driven protrusions 5b, 5b.

When the rotor 2 rotates in the counterclockwise direction, the driving portion 2d rotates in the direction of the arrow in FIG. the locking protrusions 5a,
5a from the engaging member (not shown). The rotor 2 returns to its original position due to the force of the coil spring 6 which attempts to return the locking members 5, 5 to their original positions.

When the rotor 2 rotates in the clockwise direction, that is, in the locked state, the driving portion 2d only rotates in the opposite direction through the space, and the locking members 5 do not operate.

A lid 7 for supporting the knob 3 is provided on the front surface of the cylinder lock body 1, and the rotor 2 faces the outside through a hole 7a of the lid 7.

Note that 1g in FIGS. 4 and 5 is a claw provided on the cylinder lock body 1, which can be attached with one touch to a part of a not-shown glow box or the like to which the cylinder lock body 1 is attached.

Since the present invention is constructed as described above,
By operating the knob on the lock part, the door can be opened in the unlocked state. Further, when the knob is operated in the locked state, only the knob moves freely, so that unnecessary rotational operating force is not exerted on the rotor, and there is an effect of preventing the lock from breaking.

[Brief explanation of the drawing]

Fig. 1 is a front view of the knob lock according to the present invention, Fig. 2 is a front view with the front cover removed, Fig. 3 is a partially cutaway rear view, and Fig. 4 is the same as Fig. 1.
A line sectional view, and FIG. 5 is an exploded perspective view. 1... Cylinder lock body, 2... Rotor, 3...
Knob, 5...Locking member.

Claims (1)

[Claims] 1 A rotor is rotatably provided in a cylinder lock body, a knob is provided on the front face of the cylinder lock body so as to be movable in a direction intersecting the rotor, and when the rotor is in an unlocked position, the knob is The rotor is driven, and when the rotor is in the locked position, the knob is in an engaged relationship that does not drive the rotor, and a locking member is provided on the back of the cylinder lock body, and when the rotor is rotated by the knob, the knob is in an engaged relationship that does not drive the rotor. A knob lock characterized in that the locking member is driven in the locking mechanism.