JPH0113659Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking rod drive mechanism in a steering lock device for an automobile.
The movement of the locking rod to the unlocked position or the locked position is directly controlled by the key cylinder.

An example will be described below with reference to the drawings.
In the drawings, reference numeral 1 denotes a frame of a steering lock device, which has a small opening 1a at the front and a large opening 1b at the rear, through which a housing case 2 of a cylinder lock is inserted and fixed. A key cylinder 3 is rotatably provided within the case 2.

A first step 3a in the circumferential direction is provided at the front end of the key cylinder 3, and a front end opening 1a of the frame 1 is provided.
The second step 3a' in the circumferential direction formed at the rear of the first step 3a engages with the annular step 2a of the housing case 2. It is provided so as to be movable in the axial direction and rotatable until it is aligned.

There is an insertion hole 3 for the key 4 in the center of the key cylinder 3.
A plurality of pin tumblers (not shown) driven by the key 4 are provided between the key cylinder 3 and the housing case 2 in a known manner.

One end of the spindle 5 is engaged in the locking hole 3c at the rear end of the key cylinder 3, and the other end of the spindle 5 is fixed by the groove 1c of the frame 1 to close the large opening 1b of the frame 1. is supported by the hole 6a of the plate 6.

Thus, the spindle 5 is inserted into the locking hole 3 from the hole 6a.
A spring 7 is previously provided between the key cylinder 3 and the spindle 5 in the locking hole 3c.

A hole 6b that reaches the hole 6a is formed in the inner side of the plate 6 facing the steering shaft portion, and the pin spindle 8 fitted into the hole 6b engages in the annular groove 5a of the spindle 5 and rotates the spindle. 5 is rotatably locked in a predetermined position, thereby preventing the switch case 9 from being broken after being removed.

Reference numeral 10 denotes a locking rod, which is slidably provided on the holder 11 and is attached to the top 1 of the holder 11.
It is always biased in the locking direction by a spring 12 provided between the door and the door 1a. The bottom part 11b of the holder 11 closes the opening 1d in the frame 1 facing the steering shaft part. A hanger 13 is assembled to the locking rod 10 through a coupling groove 10a at the end. The hanger 13 is provided with a protruding driven portion 13a that engages with a cam portion 3d at the rear end of the key cylinder 3.

The holder 11 in which the locking rod 10 to the hanger 13 are pre-assembled is inserted into the frame 1 through the opening 1d and then moved in the direction of the key cylinder 3 so that the driven portion 13a of the hanger 13 is inserted into the cam portion 3.
d, and then insert the groove 1 as described above.
The plate 6 is fitted to and fixed to c.

A hole 3e extending in the radial direction and reaching the key insertion hole 3b is formed in the front part of the key cylinder 3, and a control piece 14 is slidably provided in the hole 3e. The outer end of the control piece 14 is biased outwardly by a spring 15 so as to abut against the housing case 2 portion, and the inner end thereof is inserted into the key insertion hole 3.
b. It is supported so that it does not protrude.

An oblique drive cam 2b for the control piece 14 is formed on the inner circumference of the case 2, and a terminal end _2b2 of the drive cam 2b is formed deeper than the drive cam 2b in the circumferential direction perpendicular to the axial direction. It is continuous with the locking step portion 2e. The locking step portion 2c extends to the rear of the starting end portion _2b1 of the drive cam 2b, and a tapered guide portion _2d1 is formed in the partition wall 2d between the starting end portion _2b1 and the locking step portion 2c.

In the above configuration, before the key 4 is inserted into the steering lock device, the device is in the state shown in FIG. 1, and the key cylinder 3 moves forward and the driven portion 13a of the hanger 13 is connected to the notch 3d ₁ in the cam portion 3d. The hanger 13 is pressed by the spring 12, and the locking rod 10 engages in a hole in the steering shaft (not shown) to lock the rotation of the steering shaft.

Next, when the key 4 is inserted into the key cylinder 3 and the key cylinder 3 is rotated, the key cylinder 3 is moved backward by the drive cam 2b via the control piece 14, and the hanger 13 to the locking rod 10 are moved to the steering shaft by the cam portion 3d. control piece 1 in the accessory position.
4 engages with the locking step 2c, thereby holding the locking rod 10 in the unlocked position (FIG. 7B). When the key cylinder 3 is further rotated from this state, the key cylinder 3 is rotated from the on position to the start position (FIG. 7, c and d), and the spindle 5 switches the contacts in the switch case 9 accordingly. When the key cylinder 3 is returned to the lock position from this state, the drive cam 2b
It is located at the rear of the
Figure E), then when you pull out key 4, key cylinder 3
The elasticity of the spring 7 that urges the control piece 14 forward causes the spring 15 that urges the control piece 14 in the protruding direction.
Since the elasticity of the control piece 14 is stronger than the elasticity of the key cylinder ₃ , the control piece 14 is moved backward through the tapered guide portion 2d1, climbs over the partition wall _2d , and advances together with the key cylinder 3 to the starting end 2b1 of the drive cam 2b. The hanger 13, in which the driven portion 13a of the hanger 13 has lost support from the circumferential portion _3d2 , is driven by the spring 12, and the locking rod 10 moves to the locked position (FIGS. 1 and 7A).

As described above, the present invention directly controls the movement of the locking rod to the unlocked position or the locked position by the key cylinder, so the number of parts can be reduced and the mechanism can be greatly simplified. It is possible to ensure stable operation.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the steering lock device.
Figure 2 is a diagram of the same operating state as above, Figure 3 is a sectional view taken along the line - - in Figure 1, Figure 4 is an exploded perspective view of the cylinder lock part, Figure 5 is an exploded perspective view of the locking rod part, Figure 6 7 is a perspective view showing the process of connecting the locking rod portion to the frame, FIGS. FIG. 9 is a perspective view showing the relationship between the housing case and the hanger, and FIG. 9 is a perspective view of the main part of the housing case as seen from the inside. 3...Key cylinder, 3d...Cam section, 3d ₁ ...
...notch part, 3d ₂ ... circumference part, 10 ... locking rod, 13 ... hanger, 13a ... driven part.

Claims (1)

[Scope of utility model registration request] A cam part that is continuously and integrally formed at the rear end of the key cylinder has a notch that drops in the radial direction with respect to the circumferential surface. an engaging driven portion, a spring biasing the hanger against the cam portion, and a spring disposed movably within a radially formed hole in the key cylinder so that the outer end is attached to the case. A control piece biased by a spring so as to abut each other is provided, and includes a diagonal drive cam at the inner circumference of the case, a locking step located at the end of the drive cam and continuous in the circumferential direction, and a locking step that is continuous in the circumferential direction. A tapered guide portion is provided on the partition wall between the starting end of the drive cam and the corresponding locking step, and the key cylinder is provided with a spring having a stronger elasticity than the spring of the control piece.
While biased in the axial direction, the locking step holds the key cylinder in the moving position via the control piece, and the driven part is axially biased when the key cylinder is rotated from the lock position to the on position. The control piece moves from the notch to the circumferential surface, and when the key is pulled out, the control piece retreats and the hanger biased by the spring falls from the circumferential surface into the notch due to the axial movement of the key cylinder. A locking rod drive mechanism in an automobile steering lock device characterized by: