JPH0434125Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a cylinder lock type steering lock for automobiles that is effective in preventing theft.

[Prior art]

Conventionally, there are various types of cylinder lock type steering locks equipped with an anti-theft function. However, for example, using a rotating jig made of a board with the same thickness as the key and bent with a bifurcated tip, the wire is inserted through the key insertion slot while applying rotational force to the rotor, and the tumbler is pushed into the rotor one after another. Locking, unlocking by so-called picking (Jitsukaiaki)
57-1251 introduces the procedure) There are many things that are not useful for prevention.

The present invention provides a cylinder lock type steering lock having a structure that cannot be unlocked even by the above-mentioned picking, and is characterized in that the rotor is prevented from rotating with the above-mentioned forked turning jig. It is something to do.

[Structure of the idea]

Hereinafter, an example of the configuration of the present invention will be explained based on the drawings.

In the figure, reference numeral 1 denotes a rotor, which has a square shaft 2 at its lower end, on which a groove 3 of a constant width is formed so as to slightly bite into the rotor from the lower surface. Reference numeral 4 denotes locking claws provided on both sides of the square shaft. 5 is
It is a substantially T-shaped lock plate that is slidably fitted into the split groove 3, and the length of the horizontal part is longer than the diameter of the rotor, so that both wing parts protrude by a certain amount from the left and right sides of the rotor. It's summery. 6 is a compression spring, 7 is a screw, and 8 is a concave locking body with a claw 9 on the inner surface of the upper part.
It is fixed to the bottom surface of the recess with the screw 7 mentioned above. The camshaft 10 has a large diameter upper part, and is provided with a recess 11 in the center of the upper surface into which the lower end of the rotor and the square shaft 2 fit vertically and slidably. 5, slidable groove 12
is provided in the axial direction.

13 is a housing, in the center of the upper half of which is provided a rotor hole 14 into which the rotor 1 is rotatably fitted;
The camshaft 10, which has a larger diameter than the rotor 1, is located in the lower half.
A cam hole 15 into which the cam is rotatably fitted is provided.
The lock plate 5 is also attached to the shoulder portion 16 at the upper end of the outer circumference of the cam hole.
A shoulder groove 17 is formed into which the protrusions of both wings partially fit.

In the above embodiment, since a conventional rotor is used, a square shaft is provided at the lower end, but this square shaft may be omitted. That is, the camshaft may be rotated using the groove 12 of the camshaft by means of the lock plate 5 that fits into the groove 3 at the bottom of the rotor.

The cylinder lock type steering lock according to the present invention is assembled as shown in FIG. That is, after the locking body 8 is fixed in the recess 11 of the camshaft 10 with the screw 7, the lock plate 5 is fixed via the compression spring 6.
Insert the vertical part below the center of the lock plate 5 into the center of the compression spring, and insert both wings into the cam hole 15 from below the housing 13 with the protruding parts fitted into the grooves 12. Fit the upper part into the shoulder groove 17 of the housing. Next, with the tumbler attached to the rotor 1, insert it from above the rotor hole 14 of the housing, insert the split groove 3 at the lower end into the lock plate 5, and push it firmly, so that the locking pawl 4 locks into the locking body 8. By pushing the claws 9 open and then closing the claws of the locking body, they are connected and fixed in a so-called hell-fit state.

[Effect]

In the state shown in Fig. 1, even if an attempt is made to turn the rotor 1 using a rotating jig for picking, the protruding portions of both wings of the lock plate 5 will fit into the shoulder grooves 17 of the housing shoulder at a deep position in the cylinder lock. It won't rotate because it's jammed. Therefore, even if the tumbler 18 is pushed into the rotor with a wire, no rotational force is applied to the side of the tumbler, and the tumbler returns to its original state unless the pushing force from the wire is removed, making it impossible to unlock by picking.

Further, it is impossible to perform picking while pushing up the lock plate with a long wire that reaches the lock plate, considering the size of the key hole. On the other hand, when rotating the rotor using the normal key 19, the tip of the key locks the lock plate 5 as shown in FIG.
The length of the key is set so that it can be rotated with the protrusions of both wings of the lock plate removed from the shoulder groove 17 of the housing by pressing down, so the rotor can rotate smoothly.

[Effect of idea]

The present invention does not significantly change the structure or size of the conventional cylinder lock-type steering lock, but instead creates a groove in which the lock plate fits in the lower part of the rotor, camshaft, and shoulder of the housing, and straddles these. The simple structure of interposing a lock plate prevents theft by picking, and the structure is simple and inexpensive, and its operation is reliable.
It has high practical value.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an example of the present invention. FIG. 2 is a longitudinal sectional view of the assembled state. FIG. 3 is a longitudinal cross-sectional view when the key is inserted. DESCRIPTION OF SYMBOLS 1... Rotor, 3... Division groove, 5... Lock plate, 8... Locking body, 10... Camshaft, 11... Recess, 12... Groove, 13... Housing, 17...
Shoulder groove.

Claims (1)

[Scope of utility model registration request] A groove 3 is provided on the lower surface of the rotor 1, while a recess 11 into which the lower end of the rotor fits is provided on the upper surface of the camshaft 10, and a groove 12 corresponding to the groove 3 is provided on the upper surface of the recess. 13 is also provided with a shoulder groove 17 having the same width as the above, and a compression spring is inserted into the recess 11 on the upper surface of the camshaft to form a groove approximately T.
The protruding parts of both wings of the letter-shaped lock plate 5 are inserted into the groove 12 of the camshaft.
At the same time, the split groove 3 on the lower part of the rotor is inserted into the central part of the lock plate, and a part of the upper end of both wing protrusions of this lock plate is normally fitted into the shoulder groove 17 of the housing 13 due to the pressure of the compression spring. It's here,
A cylinder lock type steering lock for an automobile, in which when a normal key is inserted, the tip of the key pushes down the lock plate to release the lock plate from the shoulder groove.