JPS5849413B2 - steering shaft lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering shaft lock that can lock the steering shaft of an automobile by removing a key.

Conventionally, steering locks have been used to secure the steering wheel of a car to prevent the car from being stolen.

Therefore, this type of steering shaft lock has a notched recess formed at one location on the steering shaft, and when the key is locked, the lock rod is inserted into the notched recess, making it impossible to operate the steering wheel.

In a case where the shaft is formed with a cutout recess at one place, when the handle is not in a predetermined position, the cutout recess of the shaft is also located away from the lock rod.

Therefore, when the handle is not in the designated position, even if the key is placed in the lock position and pulled out, the lock rod cannot engage the notch recess, so the shaft cannot be locked. When the cylinder lock is not inserted into the recess, there is no resistance to rotation of the cylinder lock, so there is a drawback if the cylinder lock is unlocked using a so-called picking tool that can be used to illegally unlock the cylinder lock.

The present invention has been made with attention to this point, and its purpose is to ensure that the lock rod is attached to the cut arrow portion of the fixing member by removing the key no matter where the handle is located. This is to prevent theft by making it impossible to operate the handle.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side sectional view of the cylinder lock A side of the present invention, and 1 is the main body of the steering lock.

The main body 1 has a cylindrical shape, and the cylindrical body further protrudes from the side surface of the cylindrical body.

An unrinder lock case 2 is fitted into one cylinder of the main body 1, and a tumbler 14 is fitted inside the cylinder lock case 2.
A cylinder 3 is fitted therein, and the shaft end of a rotor 8 is fitted and fixed to an annular tube 2a formed at the end of the cylinder 3, and an inclined surface 2b is formed on the outer peripheral edge of the annular tube 2a. When the rotor 8 is connected to the rotor 8, the steel ball 12, which is provided in the storage chamber of the rotor 8 and is pressed by a spring 13, is slid by the inclined surface 2b to form the cutout recess 2.
c, thereby preventing the slider lock A from accidentally slipping out of the main body.

A sliding tube 10 is fitted into the rotor 8, and the pin 9 is driven into the rotor 8 at a position in the notched groove 11 of the sliding tube 10.

Therefore, the sliding tube 10 moves forward and backward in the axial direction together with the rotor 8 while allowing the rotor 8 to rotate.

A storage case 10' provided on the sliding tube 10 fits into an axial guide groove 10'' formed on the inner wall surface of the case body 1,
When the key is rotated or removed, it slides within the guide groove 10'' (FIG. 5).

An engagement lever 15 having an oblique guide surface 15' at its tip is pivotally mounted in the storage case 10' by a pin 17, and is biased in the projecting direction by a spring 16.

A bent portion 5a of a lock lever drive lever 5, which is pivotally supported by a pin 20 to the other cylindrical body of the main body, is engaged with a cam portion 8a of the rotor 8 having an inclined surface 8c.

The end 8b of the rotor 8 operates the switch 19.

When inserting the key into cylinder lock A and turning it,
In order to allow the cylinder 3 to enter into the case body 1, an inclined protrusion 2g is formed on the inner edge 2d of the outer periphery of the cylinder 3, and the inclined protrusion 2g is engaged with the edge 2h of the main body 1 so as to slide. let

2f is tumbler 14 and 14 buried in Shinonda 3
' is the groove into which the groove is inserted.

End portion 5 of bent portion 5a of lock lever 1 drive lever 5
c is disposed opposite to the engaging lever 15 at a position where it can be engaged and disengaged.

A spring 18 is provided on the back side of the locking lever 7 drive lever 5, and is constantly biasing the locking lever 6 in the locking direction via the four parts 6' and in the direction in which the end 5c is not engaged.

Reference numeral 7 denotes a fixing member whose central edge 7e is fitted onto the steering shaft 22 and has a number of locking notches 7a, 7b, 7c, ? on its outer periphery. a...
・The locking rod 6 engages and disengages from this.

23 is a cover for the steering shaft 22.

Next, to explain its operation in the above structure, first, when the key is inserted into the cylinder lock A, the key is in the Lock position, and when the key is further turned, it changes from Acc to ON and then to St.
Go to art and start the engine.

The relationship from this Lock position to the Start position is shown in Figure 2.
This is as shown in the operating state diagrams A, C, and C in Figure 3.

Figure 2 shows the Lock position, and Figure 3 shows the Start position.
Although the positions are shown in the figure, the relationship between the lock lever drive lever 5 and the engagement lever 15 at this time is such that the lever 5 is located below the engagement lever 15.

That is, the operation from the Lock position to the Start position is as follows: When the key is inserted into the cylinder 3 and rotated, the rotor 8 is moved backward, and at this time, the inclined surface 8c formed on the cam portion 8a of the rotor 8 is rotated. While sliding the lever 5, let the spring 18 push down the anti-shield lever 5 slightly downward, and then as shown in Fig. 3,
The lever 5 is slid downward by the cam portion 8a of the rotor 8 while pressing the inclined surface 15' of the engagement lever 15 against the spring 18 using the pin 20 as a support shaft.

Therefore, while the car is running, the lever 5 is engaged with the engagement lever 1.
5 and is locked to the engagement lever 15.

Next, in the above state, turn the key from the On position to the Lo
When the key is rotated in reverse order to the k position, the key will lock.
Rotation is prevented in this position.

In this Locked state, when the key is removed from the cylinder lock A, the unrinder 3 moves along with the key by a distance B, and then only the key can be removed.

That is, while the tumbler 14' moved by the tip of the key is in contact with the annular protrusion 2e of the cylinder lock case 2, the tumbler 14' is engaged with the notch recess of the key, so that the tumbler 14' is moved against the cylinder lock case 2. The key cannot be removed from the cylinder 3 unless it moves into the groove 2f formed in the cylinder 3.

When the rotor 8 moves back together with the cylinder 3 when the key is removed from the lock position, the engagement lever 15 provided on the sliding tube 10 fixed to the rotor 8 also moves back at the same time. When the locking lever 5 is released from the coupling lever 15 and the lever 5 returns to its original position (FIG. 2), the locking rod 6 is fixed again to the steering shaft by the action of the spring 18.
It engages with any one of 7b, 7c, and 7d to fix the operation of the handle.

As described above, the present invention does not directly form one concave portion on the steering shaft, but instead provides a fixing member on the steering lock shaft, and furthermore, the fixing member is provided with an appropriate cut-arrow portion, so that the steering wheel can be held at a predetermined position. The lock can be reliably locked from the cylinder lock by pulling it out without having to bring it into position, which not only prevents picking, but also has excellent strength, so it can fully demonstrate its function as an anti-theft device. This is a significant improvement.

In addition, in the present invention, the sliding tube is provided with an engagement lever, and the lock lever drive lever driven by the cam portion of the rotor is provided so as to be able to engage and disengage from the engagement lever. The lock can be locked by moving the lever to release the restraint on the lock lever drive lever, and the lock as a whole can be made compact.

Further, in the present invention, since the cam portion is provided with an inclined surface, the candlestick 1 drive lever can be smoothly driven 1 time during the initial operation of the cylinder or rotor.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the cylinder lock side, Fig. 2 is a side sectional view of the lever side, Fig. 3 shows a cross-sectional operating state diagram, and Fig. Figure 4 is Figure 3 A IV-
FIG. 5 is a cross-sectional view taken along line IY, and FIG. 5 is a right side cross-sectional view taken along line v--V in FIG. 1...Body, A...Cylinder lock, 3
...Cylinder, 5...Lever, 6.
...Tatsuku rod, 7...Fixing member, 8a...
-...Cam part, 8c...Slanted surface, 10...
...Sliding tube, 15...Engagement lever.

Claims (1)

[Claims] 1 A cylinder that moves forward and backward with the rotation of a key, a rotor that rotates with the rotation of the cylinder and moves back and forth with the cylinder, and a rotor that is fitted onto the rotor and moves back and forth with the rotor while allowing the rotor to rotate. a sliding cylinder, an engagement lever is provided on the sliding cylinder biased by a spring, and a locking lever drive lever with an intermediate shaft supported is engaged with a cam portion having an inclined surface of the rotor; The end thereof is opposed to the engagement lever, and when the key is rotated, the end is driven by the cam part to move the engagement lever backward, ride over the engagement lever, and maintain its position. 1. A steering shaft lock comprising a fixing member which is held by a coupling lever and has a plurality of locking arrow parts fixed to a handle.