JPS5849414B2 - 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 engaged in the notched recess, thereby making it impossible to operate the steering wheel.

In a case where a notch recess is formed at one place on the shaft as described above, when the handle is not in a predetermined position, the notch recess of the shaft is also in a position 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. Since there is no resistance to rotation of the cylinder lock when the recess is not engaged, there is a drawback that the cylinder lock can be easily 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 prevent the lock rod from breaking through the notch in the fixing member when the key is removed, even if the handle is in an odd position. This is to prevent theft by getting into the handle and making it impossible to operate the handle.

The present invention also provides a steering shaft lock that has a simple structure and can be manufactured at low cost.

That is, a cylinder lock that moves forward and backward when a key is inserted, a rotor that rotates as the cylinder lock rotates, a sliding tube fitted to the rotor, an engaging pin provided on the sliding tube, and the engaging pin that connects and separates. The lever includes a spring that biases the lever, a lock rod that moves forward and backward as the lever moves, and a fixing member having a cut arrow part fixed to the handle. The purpose of the present invention is to provide a steering shaft lock that can be engaged with the steering shaft.

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 is formed into a cylindrical body, and the cylindrical body is formed to further protrude from the side surface of the cylindrical body.

A cylinder lock case 2 is fitted into one cylindrical body of the main body 1, and a tumbler 14 is further fitted inside the cylinder lock case 2.
A cylinder 3 is fitted therein, and one 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 is formed on the outer peripheral edge of the annular tube 2a. 2b, and when coupled with the rotor 8, the steel ball 12, which is pressed by a spring 13 provided in the storage chamber of the rotor 8, is slid along the inclined surface 2b and engaged in the notched recess 2c, thereby closing the cylinder. Lock A will not accidentally slip out of the main body.

A clip 24 is attached to the end of the cylinder 3.

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 guide groove 10' is formed in the sliding tube 10 in the axial direction, which engages with an axial guide protrusion 10'' formed on the inner wall surface of the case body 1, and moves in the axial direction when the key is operated. .

A retaining pin 15 is provided in the storage chamber 10'' of the sliding tube 10 together with a spring 25.

The cam portion of the rotor 8 has a pin 20 attached to the other cylindrical body of the main body 1.
The bent driven portion 5a of the lock lever drive lever 5, which is pivotally supported at the lock lever 5, engages with the bent driven portion 5a.

The other end 8b of the rotor 8 is brought into contact with and separated from a switch 19.

A spring 26 is fitted to the end of the rotor 8, and constantly urges the rotor 8 toward the front of the cylinder lock.

A cut-arrow portion 2g communicating with the key insertion hole is formed on the front surface of the cylinder 3, and an inclined surface 2 is formed at both ends within the cut-out hole 2g.
An annular groove 2e is formed in which the engager 27 engages in a certain retracted position when inserting the key (see Fig. 4A, 4B). mouth).

When the key is removed from the cylinder lock, the rotor 8 to the cylinder 3 are pushed forward by the width l1 due to the bias of the spring 26 at the end of the rotor 8 (FIGS. 1 and 10).

End portion 5c of bent driven portion 5a of lock lever drive lever 5
is arranged at a position where it can come into contact with and separate from the engagement pin 15, and moves over the engagement pin 15.

The other end 5b of the lever 5 is engaged with the recess 6' of the locking rod 6.

For locking lever, O mass spring 18 on the back of drive lever 5
is provided to constantly urge the locking rod 6 to the locked position.

RHV=7e of the fixing member 7 is fitted and fixed to the steering shaft 22 of the handle 21, and the fixing member 7 has a large number of locking notches 7a, 7b, 7c,
7d.

23 is a cover for the steering shaft.

One embodiment of the present invention is constructed as described above.

Next, the operation of such a configuration will be explained. First, when the key is inserted into the cylinder lock A, the key 28 is in the LOCK position, and when the key is further rotated, the sequence changes from Acc to ON and then to START, starting the engine.

The relationship from this Lock position to the Start position (as shown in FIGS. 5 and 6, A, and the operation state diagram of the mouth).

Further, FIG. 7 shows an unlocked state diagram in which the key 28 is not removed from the cylinder lock A.

Figure 5 shows the Lock position, and Figure 6 shows the Start position.
In relation to this, the lever 5 is located below the engagement pin 15.

That is, the action from the Lock position to the Start position is as follows: When the key is inserted into the cylinder 3, the rotor 8 is moved by the l1 width due to the contact action between the engager 27 and the key 28, and at this time, the rotor 8 While the cam part 8a slides on the lever 5, the lever 5 is pushed down slightly against the spring 18, and then the key 28 is inserted into the cylinder lock as shown in FIGS. When inserted into A, the engagement pin 15 contacts the side surface of the lever 5 and moves backward slightly against the spring 25, but when it is removed from the side surface of the lever 5, the cam portion of the rotor 8 is removed as shown in FIGS. 5 and 6. 8a, the lever 5 is rotated counterclockwise about the pin 20 against the spring 18.

At this time, the engagement pin 15 is located above the lever 5, and the lever 5
to maintain the unlocked state.

Therefore, while the car is running, the lever 5 is locked to the engagement pin 15.
Since the locking rod 6 is located below the engagement pin 15 and is engaged with the engagement pin 15, the locking rod 6 is disengaged from the notch 7a of the fixing member 7, and the handle 21 can be rotated.

Next, in the above state, turn the key from the on position to the Lo
When the key is sequentially reversely rotated to the k position, the key is prevented from rotating at the Lock position.

In this Locked state, when the key is removed from the lock A, the cylinder 3 is moved together with the key by the distance l1 by the pressure of the spring 26, and then only the key is removed.

At this time, the engaging element 27 returns from the annular groove 2e to the position A in FIG. 4 along the inclined surface 2h1.

In this manner, when the key is removed from the lock position force, the rotor 8 is moved forward together with the cylinder 3 by the spring 2S, so the engagement pin 15 provided on the sliding tube 10 fixed to the rotor 8 is also moved forward at the same time.

At the same time that the engagement pin 15 is disengaged from the lever 5, the lever 5 is returned to its original position by the action of the spring 18, so that the locking rod 6 is again connected to the cutting portions 7a + 7b, 7c, and 7b of the fixing member 7 fixed to the steering shaft. 7d to fix the operation of the handle.

(Fig. 5) As described above, the present invention does not directly form one recess on the steering shaft, but instead provides a fixing member on the steering shaft, and furthermore, the fixing member is provided with an appropriate cutting portion. Therefore, the lock can be reliably locked from the cylinder lock by removing the handle without having to bring it to the specified position, which not only prevents picking, but also has a simple structure and excellent strength. Therefore, the anti-theft function can be fully demonstrated and has been significantly improved.

In addition, in the present invention, the sliding tube is provided with an engagement pin, and the lock lever driving lever driven by the cam portion of the rotor is provided so as to be able to engage and disengage from the locking lever, so that it is engaged when the key is removed. The lock can be locked by moving the pin to release the restraint on the lock lever drive lever, and the entire lock can be constructed compactly.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a sectional view of the cylinder lock side, Fig. 2 is a side sectional view taken along line B-B in Fig. 1,
Figure 3 shows the working state of a cross section of the main part of the mouth when the key is removed and inserted, and Figure 4 shows a cross section of the main part of the mouth when the key is removed and inserted. Operating state diagram,
Fig. 5 is a side sectional view of the lever side, Figs. 6 and 7 are side sectional views of the lever side, Fig. 8 is a sectional view of the main part taken along line H-H in Fig. 6, and Fig. 9 is a fixing member. 10th cross-sectional view of essential parts of and lever
The figure shows a side sectional view of the unlinder lock. 1...Body, A...Cylinder lock, 3
...Cylinder, 5...Lever, 6.
...Lock rod, 7...Fixing member, 8a.
...Cam part, 10...Sliding tube, 15...
...Engagement pin, 24...Clip, 26.
... Spring, 27 ... Engagement element, 28
······Key.

Claims (1)

[Claims] 1. A cylinder that moves forward and backward when a key is inserted and removed, a rotor that rotates as the cylinder rotates 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 engaging pin provided on the sliding cylinder so as to be movable in the axial direction and biased in the advancing direction by a spring, and an intermediate part thereof are pivotally supported, and one end is driven by the cam part of the rotor, and Due to the movement of a lock lever drive lever having a driven part that crosses the advancing locus of the mating pin and comes into contact with and separates from the engagement pin, a spring that biases the lock lever drive lever, and the first lock lever drive lever. A steering wheel comprising a locking rod that moves forward and backward, and a fixing member having a plurality of locking notches fixed to the steering wheel, and the locking rod engages in a cut-out portion of the fixing member when a waist key is removed and installed. shaft lock.