JPH069967B2 - Tilt steering device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt steering device, and in particular, it is used to enable a steering position adjustment and an evacuation operation with a position stored by an on / off operation of an actuator. It

2. Description of the Related Art A tilt steering device is basically arranged between a steering shaft housing and a breakaway bracket on a stationary member side, and a pole member that can be engaged with and disengaged from a latch member fixed to the breakaway bracket, and the latch. Members also have detachable memory members and rule members, but the construction and operation of these members are disclosed in, for example, Japanese Patent Application Laid-Open No. 57-155156. Therefore, the description is omitted here.

Problems to be Solved by the Present Invention A conventional tilt steering device is disclosed in the above-mentioned publication, or JP-B-59-43170, JP-B-59-41897, and JP-A-60-99766. By manually operating the lever protruding from the steering column,
The tilt movement of the steering wheel is made possible.

In this case, there is a risk of operating the lever carelessly, for example, there is a risk of the steering wheel tilting due to a child holding the lever while driving, and the lever protruding by the steering column is It spoils the aesthetics around the steering column.

Therefore, it is an object of the present invention to provide a tilt steering device that simplifies the periphery of the steering column and does not malfunction.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a cam member and a hook portion on a pole member of a tilting device, and a hook of a cam member rotatably supported by a column bracket. Basically adopts a technical means to electrically connect the actuator that selectively abuts the cam surface of the pole member and the hook portion to the electric circuit having the manual operation safety circuit and the automatic retract operation circuit in parallel relationship. To do.

More specifically, the present invention relates to a housing of a steering shaft, a column bracket fixed to the housing, a breakaway bracket on a stationary member side for rotatably supporting the column bracket via a pin, A tilting device held by the column bracket having a pole member supported by the pin through an elongated hole so as to be detachable from a ratchet fixed to the breakaway bracket, and the pole member of the tilting device is A manual operation safety circuit connected to an actuator and driven by a hook of a cam member rotatably supported by the column bracket, the actuator receiving a signal indicating a stop of the vehicle, and the actuator in series with the safety circuit Switch for automatic operation and automatic evacuation movement activated by the instruction signal A circuit having a circuit and a timer in series with the automatic evacuation operation circuit, and a circuit having the manual operation safety circuit and the operation switch in an electric circuit in which the circuit having the automatic evacuation operation circuit and the timer are in a parallel relationship. Provided is a tilt steering device characterized by being connected.

Action When the actuator is turned on via the manual operation safety circuit and switch, the steering wheel can be moved to an arbitrary position by manual operation, and when the switch is turned off at the new steering wheel movement position to turn off the actuator, At this position, the pole member and ratchet engage to lock the steering wheel in a new position. This is used to move the steering wheel to the desired position while the driver is seated. on the other hand,
When the automatic evacuation operation circuit turns on the actuator by an instruction signal such as ignition key removal, the steering wheel can be moved to any evacuation position, and after a certain time set by the timer, the actuator turns off by the circuit, The steering wheel can be re-fixed by a manual tilting operation. This facilitates movement when the driver leaves the car.

Embodiment A steering shaft 2 connected to a steering wheel 1 is connected to a shaft 2'and a column tube 3'through a joint 3. A column bracket 7 fixed to a housing 4 that pivotally supports the steering shaft 2 is pivotally attached to a breakaway bracket 6 via a pin 5. The breakaway bracket 6 is fixed to a stationary member (not shown). This column bracket 7
A tilting device 8 is arranged on the side of the.

On the column bracket 7, in addition to the pin 5, the second pin 9
Is fixed, and the pins 5 and 9 engage with the elongated holes of the pole member 10. Fix the ratchet 11 to the bracket 6,
The tooth portion 12 of the pole member 10 is made engageable with the ratchet 11. The memory member 13 has a pawl portion 14 engageable with the ratchet 11 at one end thereof and an elongated hole at the other end thereof, and the pole member 10 has a third pin 15 that is set up on the pole member 10. Is inserted into the long hole of the memory member 13 to be engaged with the memory member 13. A regulation member 16 pivotally supported by the pin 5 is arranged between the pole member 10 and the memory member 13. The regulation member 16 has a pawl 17 for holding the pole member 10 and a pawl 18 for holding the memory member 13 at the tip thereof. A substantially eight-shaped spring 19 is arranged between the pin 5 and the second pin 9. Reference numeral 20 is a pressing plate.

The pole member 10 has a cam surface 2 as shown in FIG.
1 and the hook portion 22 are provided. On the other hand, the cam member 24 is supported by the shaft 23 set up on the column bracket 7.
A hook 25 is provided at the tip of the cam member 24. Cam member 2
The plunger of the actuator 26 is connected to the other end of 4.

In the state shown in FIG. 3, when the actuator 26 detects that the ignition key has been removed and is automatically turned on, the cam member 24 rotates clockwise around the shaft 23,
The hook 25 disengages from the cam surface 21 and pushes the hook portion 22 to the right. The rightward movement of the hook portion 22 of the pole member 10 pushes the memory member 13 rightward by the third pin 15 that is erected on the pole member 10, so that the tooth portion 12 separates from the ratchet 11 and the pawl portion 14 moves. The ratchet 11 is engaged and the current position is stored. When the steering wheel 1 is moved to the retracted position, the pole member 10 moves downward together with the column bracket 7 and is held by the pawl 17 as shown in FIG.

When the actuator 26 is turned off after a certain period of time, the cam member 24 returns to the position shown in FIG. 3 by the urging force of the spring 35, and the hook 25 of the cam member 24 comes into contact with the cam surface 21 of the pole member 10 again. When the steering wheel 1 is tilted, the pole member 10 and the restriction member 16 are rotated clockwise around the pin 5 together with the spring 19. At this time, when the pawl 18 hits the memory member 13 and the pawl 17 separates from the pole member 10, the tooth portion 12 of the pole member 10 moves to the ratchet 11.
Engage with. That is, the steering wheel 1 returns to the original position. In other words, the steering wheel 1 returns to the stored position.

Incidentally, the actuator 26 is manually turned on by turning on the switch 27, the steering wheel 1 is manually moved to a desired position, and then the actuator 26 is turned off.
By engaging the tooth portion 12 of the pole member 10 with the ratchet 11, the state shown in FIG. 3 is obtained, and the steering wheel 1 can be set to a new position.

The actuation switch 27 of the actuator 26 can be arranged on the pad of the steering wheel 1 as shown in FIG.

The electric circuit shown in FIG. 6 has a manual operation safety circuit 28, and the manual operation safety circuit 28 includes a vehicle stop signal,
The solenoid 28 'operates only when the switch 27 is turned on when an instruction signal such as a parking brake signal is input,
The actuator 26 can be operated. Therefore, the steering wheel can be moved to a desired position by manual operation.

This is used not only when the driver moves the steering wheel to a desired position while seated, but also when the steering wheel is moved to facilitate the seating of the driver.

The automatic evacuation operation circuit 29 in parallel with the safety circuit 28 receives instruction signals such as vehicle stop, engine non-rotation, ignition key removal signal and parking brake signal,
Actuator 2 automatically activates solenoid 28 '
6 is operated. To remove and insert the key, as shown in FIGS. 7 and 8, place the lever 31 in the key cylinder 30,
When the key 32 is inserted, the lever 31 pushes the contact 33,
Notify that the key 32 has been pressed. Key 32
When the lever is removed, the lever 31 separates from the contact 33 and sends a separated signal to the circuit 29, as shown in FIG.

Reference numeral 34 in FIG. 6 is a timer, which turns off the actuator 26 after a predetermined time.

The position of the switch 27 is not limited to the position on the pad, and may be the steering column or the dashboard. Instead of the timer 34, when the steering wheel moves to the retracted position, the limit switch may detect the position and the actuator may be turned off. Reference numeral 35 is a return spring of the cam member 24, and 36 is a return spring for the steering wheel 1.

Advantageous Effects of the Invention Since the present invention only combines a mechanical tilt mechanism with a cam member and an actuator and actuates the cam member, the cost is lower than that of an electric device incorporating a computer. Further, since there is no protrusion such as a lever, it is excellent in comfort and safety.

The electric circuit used in the present invention is provided with a manual operation safety circuit and an automatic retraction operation circuit, and enables a tilt position adjustment manual operation and an automatic retraction operation by operating an actuator according to a signal from each of the circuits. The safety against the operation can be further improved.

[Brief description of drawings]

FIG. 1 is a front view of an example of the present invention, and FIG. 2 is an arrow view of FIG.
II-II sectional view, FIG. 3 is a front view of the tilt mechanism,
FIG. 4 is a front view showing a state where the steering wheel is moved to the retracted position, FIG. 5 is a view showing a switch position for the actuator, FIG. 6 is a view showing an example of an electric circuit for operating the actuator, and FIG. Is a diagram showing a state where the key is removed, and FIG. 8 is a diagram showing a state where the key is inserted. In the figure: 1 ... Steering wheel, 5 ... Pin, 6 ... Breakaway bracket, 7 ... Column bracket, 8 ... Tilt device 9 ... Second pin, 10 ... Pole member, 11 ... Ratchet , 13 ... memory member, 16 ... regulating member, 24 ... cam member, 26 ... actuator, 27 ... switch, 28 ... manual operation safety circuit, 29 ... automatic retracting operation circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazunori Sakamoto 2-1, Asahi-cho, Kariya city, Aichi Within Aisin Seiki Co., Ltd. (56) Reference JP-A-60-12375 (JP, A) JP-A Sho 57-155156 (JP, A) Actually opened 59-165266 (JP, U) Actually opened 56-13063 (JP, U)

Claims (1)

[Claims] 1. A housing for a steering shaft, a column bracket fixed to the housing, a breakaway bracket on a stationary member side for rotatably supporting the column bracket via a pin, and fixed to the breakaway bracket. A tilting device held by the column bracket having a pole member supported by the pin through an elongated hole so as to be detachable from the ratchet, and the pole member of the tilting device is connected to an actuator. A manual operation safety circuit driven by a hook of a cam member rotatably supported by the column bracket and receiving a signal indicating that the vehicle is stopped; and a switch for operating the actuator in series with the safety circuit. , An automatic evacuation operation circuit that operates by an instruction signal and the automatic A circuit having an escape operation circuit and a timer in series, the circuit having the manual operation safety circuit and the operation switch being connected to an electric circuit in which the circuit having the automatic evacuation operation circuit and the timer are in a parallel relationship. A tilt steering device characterized by.