JPH0764260B2 - Inclination adjustment device - Google Patents

Description

The present invention relates to a tilting body (upper shaft and steering wheel or seat back) as a support (main shaft), such as a tilt steering device or a seat reclining device of a vehicle. And the function of tilting the column tube or seat cushion to the maximum tilt position (upward in the case of a tilt steering device, forward in the case of a seat reclining device), and simply tilting the tilting body in the retracted state. A tilt angle adjusting device that can be effectively used for various devices that require the function of returning the tilting body to the original state before the retreat and the function of adjusting the tilting body to a desired position with respect to the support body. Regarding

[Prior art]

The tilt steering device with each of the above functions is
For example, it is proposed in Japanese Utility Model Publication No. 61-17890. Thus, in the device proposed in this publication,
The steering wheel can be retracted upward by rotating the operating lever in the original position to the intermediate operating position, and the steering wheel in the retracted state can be simply tilted downwards to move the steering wheel to the original position before retracting. It is possible to return to the above state, and the steering wheel can be adjusted to a desired position while the operation lever in the original position is rotated to the maximum operation position.

[Problems to be solved by the invention]

In the above-mentioned conventional device, the operation of the operation lever necessary for retracting the steering wheel upward,
Since the operation of the operation lever required to adjust the steering wheel to a desired position is different, there is a possibility that the operation will be mistaken, and there is room for improvement.

The present invention has been made in view of such circumstances, and an object thereof is to improve operability.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides the tilt angle adjusting device with a first bracket connected to the support or the tilting body, and a second bracket connected to the tilting body or the support. First spring means interposed between the second bracket and the first bracket to urge the tilting body to move to the maximum tilt position, and the second bracket rotatably assembled to the second bracket. A pawl provided on the first bracket so as to be disengageably engaged with the ratchet is rotatably assembled to the second bracket, and is linked to the pawl via a first cam means so that the ratchet and the pawl are engaged by the rotation. Alternatively, an operation lever that can be disengaged, a second spring means that urges the operation lever in the rotational direction toward a state where the ratchet and the pawl are meshed, and a coaxial arrangement with the tilt center of the tilting body are provided. Is rotatably mounted on the support shaft and is linked to the pawl via the second cam means, and the pivoting of the operation lever is allowed in the first region of the second cam means to allow the ratchet and the pawl to rotate. A first memory plate which allows engagement and disengagement and which holds the operation lever in a rotational operation position in the second region to hold the ratchet and the pole disengaged; and is attached to the first memory pool. A stopper spring that elastically limits the transition of the second cam means from the first region to the second region and vice versa, and a diameter that is attached to the support shaft so as to be rotatable and movable in the radial direction. A second memory plate that is integrally engaged with the first memory plate when moved in a direction, a pair of stoppers that define the amount of rotation of the second memory plate and the first memory plate, and the second memo. -Spring means for urging the first plate in the radial direction so as to disengage from the first memory plate and for urging the second memory plate in the rotation direction so as to make the rotation angle zero, and the support shaft. Rotatably and movably in the radial direction, is engaged with the second memory plate integrally in the radial direction and relatively rotatable in the turning direction, and is connected to the pole and moved by the pole. And a torsion spring that engages the connecting plate and the first memory plate to urge the relative displacement of these plates in the rotational direction to zero.

[Operation of the invention]

In the device according to the present invention, in the state where the tilting body is fixedly held at the predetermined position (the original state of the tilting body),
When the operation lever is rotated against the second spring means, the pole is rotated and the connecting plate and the second memory plate whose rotation angle is held at zero are integrally moved in the radial direction. Therefore, the second memory plate is engaged with the first memory plate to be integrated in the rotation direction, and the tilting body can be tilted by disengaging the engagement between the pole and the ratchet.

When the tilting body is tilted toward its maximum tilted position by the first spring means in such an operating state, the torsion spring causes the connection spring and the first memory plate until the first memory plate contacts one of the stoppers. Of the second cam means is elastically restricted, and the stopper spring elastically restricts the transition of the second cam means from the first area to the second area. However, after the first memory plate comes into contact with one of the stoppers and its rotation is restricted, the connecting plate works together with the pole and the like with respect to the first memory plate and the second memory plate integrated with the first memory plate. It rotates against the stopper spring and moves from the first area to the second area of the second cam means. Therefore, even if the rotation operation of the operation lever is released in this state (retracted state), the operation lever is held at the rotation operation position, the pole and the ratchet are held in the disengaged state, and both memory plates are It remains in the engaged state and remains integral.

When the tilting body retracted to the maximum tilt position is tilted toward its original state, the connecting plate is first rotated with respect to both memory plates by the action of the torsion spring, and the second cam means is moved to the second area. From the state immediately before shifting to the first region (which is the second region), and thereafter, the connecting plate and both memory plates are rotated as a unit mainly by the action of the stopper spring. Thus, the second
When the memory plate comes into contact with the other stopper to keep the rotation angle at zero, the second cam means moves from the second region to the first region against the action of the stopper spring, and the connecting plate and the second plate are connected to each other. The memory plate is radially moved by the third spring means, the second memory plate is disengaged (disengaged) from the first memory plate, and the operation lever is returned to the original position by the second spring means. When it is returned, the pole meshes with the ratchet, and the tilting body returns to the original state before retreating and is fixed.

On the other hand, if the tilting body is tilted to a new desired position within the adjustable range in the above-described operating state of the operating lever, that is, in the state where the operating lever is rotated against the second spring means, the following (a) ) And (b), the original state of the tilting body can be adjusted.

(A). When adjusting the original state of the tilting body within the range until the first memory plate contacts one of the stoppers.

In this case, as described in the operation in which the tilting body moves to the retracted state when the operating lever is operated, the torsion spring elastically restricts the relative rotation between the connecting plate and the first memory plate and the stopper. The connecting plate and both memory plates remain integral because the spring elastically limits the transition of the second cam means from the first region to the second region. Therefore, if the tilting body is stopped at a desired position and the operation lever is returned to the original position by the second spring means, as the operation lever returns to the original position, the connecting plate and the second memory plate are first returned. Is radially moved by the third spring means to disengage the second memory plate from the first memory plate, and then only the second memory plate is rotated by the third spring means to a position where it abuts the other stopper. The rotation is made to be zero and the pole and ratchet are meshed to make the tilting body incapable of tilting, and the adjustment is completed.

(B). When adjusting the original state of the tilting body in the opposite direction to the above (a).

In this case, since the second memory plate is in contact with the other stopper in the operating state of the operating lever, the second memory plate does not rotate in the direction to be adjusted, and the first memory plate engages with the second memory plate. Although it does not rotate due to the tilting body, the connecting plate rotates with respect to the support shaft as the tilting body tilts, and the torsion spring bends so as to increase its spring force. Therefore, if the tilting body is stopped at a desired position and the operation lever is returned to the original position by the second spring means, the connection plate and the second memory are firstly returned as the operation lever returns to the original position. The plate is moved radially by the third spring means so that the second memory plate is disengaged from the first memory plate, and then only the first memory plate is substantially the same as the amount by which the connecting plate is rotated by the torsion spring. The pole is meshed with the ratchet to make the tilting body incapable of tilting, and the adjustment is completed.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show a tilt steering device for a vehicle equipped with a tilt angle adjusting device according to the present invention. In this tilt steering device, a column tube 10 is provided.
A lower bracket 11 is fixed to the upper end of the lower bracket 11, and an upper bracket 13 is attached to the lower bracket 11 via support shafts 12A and 12B so as to be vertically tiltable. The rotation amount of the upper bracket 13 with respect to the lower bracket 11 is determined by a stopper pin (not shown) provided on the upper bracket 13.
Is defined by the engagement of an arcuate elongated hole (not shown) provided in the lower bracket 11 and allowing a predetermined amount of movement of the stopper pin. In addition, an upper shaft 15 integrally provided with a steering wheel 14 at the upper end is rotatably assembled to the upper bracket 13.
The upper shaft 15 is connected at its lower end to the upper end of a main shaft (not shown) via a universal joint (not shown). The universal joint is arranged coaxially with the support shafts 12A and 12B, and the upper bracket 13, the steering wheel 14, and the upper shaft 15 can be vertically tilted with respect to the column tube 10 and the lower bracket 11. .

In addition to the above brackets 11 and 13, the tilt angle adjusting device is provided between the brackets 11 and 13 to move the steering wheel 14 to the maximum tilt position shown by the phantom line in FIG. A biasing compression coil spring 16 and a pair of left and right ratchets 17, 18 for allowing or preventing tilting of the upper bracket 13 with respect to the lower bracket 11, a pole 20,
21 and operating levers 22 and 23. Each ratchet 17,
18 are fixed to the left and right sides of the lower bracket 11, respectively, and have arcuate tooth portions 17a (the tooth portion of the ratchet 18 is not shown) centered on the support shafts 12A and 12B.

As shown in FIGS. 2 to 5, the poles 20 and 21 are
The upper bracket 13 is rotatably assembled with the bolts 19A and the nuts 19B, and the tooth portions 1 of the ratchets 17 and 18 are
The tooth portion 20a meshes with the tooth 7a (the tooth portion of the pole 21 is not shown). Pins 20b and 21b are fixed to the poles 20 and 21, respectively.

The operation levers 22 and 23 are assembled to the upper bracket 13 using a connecting shaft 24, and are integrally rotatably connected via the connecting shaft 24. One operation lever
As shown in FIGS. 2, 6, and 7, 22 is a non-circular mounting hole 22a fitted to the connecting shaft 24 and the pole 2
The pin 20b of 0 is fitted and has a cam elongated hole 22b constituting cam means for rotating the pole 20 with the pin 20b,
Further, the pin 22c is fixed. This operating lever 22
As shown in FIG. 2, the tension coil spring 25 urges it clockwise as shown in the drawing, and the solenoid 26 attached to the upper bracket 13 actuates it to rotate it counterclockwise as shown via a link 27. Is configured to. The other operating lever 23 has a non-circular mounting hole 23 fitted to the connecting shaft 24 as shown in FIGS. 3 and 8.
It has a cam elongated hole 23b that constitutes cam means for rotating the pole 21 by fitting a and the pin 21b of the pole 21.

Although the cam long hole 22b of the operation lever 22 and the cam long hole 23b of the operation lever 23 are both formed by an arc portion centering on the mounting holes 22a, 23a and an arc portion approaching the mounting holes 22a, 23a, The teeth 20a of the pole 20 and the teeth 17a of the ratchet 17 are disengaged from each other, and then the teeth of the pole 21 and the teeth of the ratchet 18 are disengaged. . On the other hand, on the side of the other operation lever 23, the pole 22 is biased by a tension coil spring 28 in a direction to engage with the ratchet 18.

Further, the tilt angle adjusting device includes the first memory plate 31 and the second memory plate 32 for controlling the rotation of the pole 20.
And a connecting plate 33. As shown in FIGS. 2 and 9, the first memory plate 31 is rotatably attached to the support shaft 12A through the circular mounting hole 31a, and is a pair of stopper pins fixed to the ratchet 17. The rotation amount is defined by 38, 39, and the cam elongated hole 31b that constitutes the cam means by the pin 20b of the pole 20 and the claw 31c that selectively engages with the tooth 32b of the second memory plate 32 are described later. It has a bent portion 31d that engages with a torsion spring 34. The cam elongated hole 31b is formed in an arc shape centered on the mounting hole 31a, and has a wide first region 31b1 which allows the ratchet 17 and the pole 20 to engage and disengage, and the ratchet 17 and the pole 20 to be disengaged. It is constituted by a narrow second region 31b2 to be held, and a stopper spring 35 is arranged at the boundary portion. The stopper spring 35 is a leaf spring fixed to the first memory plate 31, and the pin 20 of the pole 20.
It has a function of elastically limiting the transition of b from the first region 31b1 of the cam elongated hole 31b to the second region 31b2 or vice versa.

As shown in FIGS. 2 and 10, the second memory plate 32 is attached to the support shaft 12A through the oval mounting hole 32a so as to be rotatable and movable in the radial direction. It has arcuate teeth 32b that engage with the claws 31c of the memory plate 31 and arcuate elongated holes 32c into which the connecting pins 36 fit. This second
As shown in FIG. 2, the memory plate 32 is biased by a tension coil spring 37 in the clockwise direction and the left direction in the drawing, and normally contacts the lower stopper pin 38 fixed to the ratchet 17. In contact with them, the rotation angle is set to zero.

The connecting plate 33, as shown in FIGS. 2 and 11, is similar to the second memory plate 32 in that it has an oval mounting hole 33.
It is attached to the support shaft 12A at a so as to be rotatable and movable in the radial direction, and has a long hole 33b into which the connecting pin 36 fits and a long hole 33c into which the pin 20b of the pole 20 fits (round hole). 33d) and the bent portion 33d that engages with the torsion spring 34.
have. As shown in FIG. 2, the connecting plate 33 is connected to the pole 20 via the pin 20b and is moved in the radial direction (longitudinal direction) by the rotation of the pole 20. A tension coil spring 41 stretched between the protrusion 33e and the connecting pin 36 is urged to the left in the figure, so that the second memory plate 32 can rotate relative to the second memory plate 32 and the second memory plate 32 can rotate relative to the second memory plate 32. Memory plate 32
The teeth 32b of the first memory plate 31 are engaged with the claws 31c of the first memory plate 31 integrally with each other and when the connecting plate 33 further moves, they are relatively movable.

As shown in FIGS. 2, 3, and 12, the torsion spring 34 is assembled to the support shaft 12A, and has a bent portion 31d of the first memory plate 31 and a bent portion 32d of the connecting plate 33. The plates 31 and 33 are urged so as to make the relative displacement in the rotational direction of the plates 31 and 33 zero, and in the free state, the tips are formed so as to approach each other as shown in FIG. There is.

In the present embodiment configured as described above, the solenoid
When the operation lever 22 is in the position shown in FIG. 2 (original position) by the action of the tension coil spring 25 when 26 is in the non-operating state, the pole 20 is moved to the position shown in FIG. 2 by the operation lever 22 via the pin 20b. The tooth 20a of the pole 20 and the tooth 17a of the ratchet 17 are held in a meshed state. At this time, the pawl 21 is held in the same manner as the pawl 20 by the operating lever 23 connected to the operating lever 22 via the connecting shaft 24, and the teeth of the pawl 21 and the teeth of the ratchet 18 are also kept in mesh with each other. To be done. The meshing state between the teeth of the pole 21 and the teeth of the ratchet 18 is maintained by the action of the tension coil spring 28. Therefore, the lower bracket
The upper bracket 13 is reliably fixed to the 11, and the steering wheel 14 and the like are fixedly held at predetermined positions.

Then, as described above, the steering wheel 14
Etc. fixedly held in place (original state)
When the solenoid 26 is actuated to rotate the operation lever 22 against the tension coil spring 25, the pole 20 is moved by the operation lever 22 via the pin 20b as shown in FIG. The pin 20
The connection lever 33 is moved in the radial direction by b, and at the same time, the second memory plate 32 is moved in the radial direction against the tension coil spring 37 via the tension coil spring 41 and the connection pin 36. Therefore, the teeth 32 of the second memory plate 32
b is engaged with the claw 31c of the first memory plate 31 and becomes integral in the rotating direction, and the tooth portion 20a of the pole 20 is disengaged from the tooth portion 17a of the ratchet 17 and disengaged. At this time, although the other operation lever 23 also integrally rotates with the rotation of the operation lever 22, the cam elongated hole 22b of the operation lever 22 and the cam elongated hole 23b of the operation lever 23 are formed in different shapes. However, since the tooth portion 20a of the pole 20 and the tooth portion 17a of the ratchet 17 are disengaged from each other, the tooth portion of the pole 21 and the tooth portion of the ratchet 18 are disengaged from each other. 32 teeth 32b is the first memory plate 3
The two poles 20 and 21 are not disengaged from the ratchets 17 and 18 before the engagement with the claw 31c of 1 is completed. After the teeth 32b of the second memory plate 32 are completely engaged with the claws 31c of the first memory plate 31, the pole 20, the connecting plate 33, etc. are moved by the elongated hole 33b provided in the connecting plate 33 and the tension coil spring. Permitted by the cooperation of 41.

In such a state, if the steering wheel 14 is not supported against the compression coil spring 16 without the intention of adjusting the position of the steering wheel 14, the compression coil spring 16 causes the upper bracket 13 and each member assembled to the upper bracket 13. The steering wheel 14 and the like are tilted toward the maximum tilt position shown in FIG. 14 (so-called tilt away).

At this time, however, the torsion spring 34 is connected to the first connecting plate 33 and the first plate until the first memory plate 31 contacts the upper stopper pin 39 and its rotation is restricted.
Since the relative rotation of the memory plate 31 is elastically restricted, and the stopper spring 35 elastically restricts the transition from the first region 31b1 to the second region 31b2 in the cam long hole 31b of the pin 20b, the connecting plate. 33 and both memory plates 31,3
2 rotates integrally, but after the first memory plate 31 comes into contact with the upper stopper pin 39 and its rotation is restricted, the first memory plate 31 and the second memory plate 32 integrated with the first memory plate 31 are rotated. On the other hand, the connecting plate 33 rotates together with the pole 20 and the like against the torsion spring 34 and the stopper spring 35, and the pin 20b is in the first area of the cam elongated hole 31b.
The process moves from 31b1 to the second area 31b2. Therefore, even if the solenoid 26 is deactivated and the turning operation of the operation lever 22 is released in this state (retracted state), the operation lever 22 is held at the turning operation position and the pole 20 and the ratchet 17 are disengaged. The memory plates 31 and 32 are held in the engaged state, and the memory plates 31 and 32 are held in the engaged state and remain integrated. At this time, the operation lever 23 is also held in its rotational operation position, so that the pole
21 and ratchet 18 are also held in a dissociated state.

Further, when the steering wheel 14 retracted to the maximum tilt position is tilted toward the original state, the coupling plate 33 is first rotated by the action of the torsion spring 34 with respect to both the memory plates 31 and 32, and the pin 20b. Is the cam slot 31b
The state immediately before the transition from the second region 31b2 to the first region 31b1 occurs, and thereafter, the coupling plate 33 and the memory plates 31 and 32 are rotated as a unit mainly by the action of the stopper spring 35. Thus, the second memory plate
When 32 contacts the lower stopper pin 38 and the rotation angle is kept at zero, the pin is resisted against the action of the stopper spring 35.
20b moves from the second region 31b2 of the cam elongated hole 31b to the first region 31b1, and the connecting plate 33 and the second memory plate 32 are moved in the radial direction (left side in FIG. The teeth 32b of the memory plate 32 are disengaged (disengaged) from the claws 31c of the first memory plate 31, and the operation lever 22 moves the tension coil spring 25.
As a result, the tooth portion 20a of the pole 20 meshes with the tooth portion 17a of the ratchet 17, and the steering wheel 14 returns to the original state before the retreat and is fixed.

On the other hand, in the operation state of the operation lever 22 described above, that is, the operation lever 22 is rotated against the tension coil spring 25 (the state of FIG. 13), the first memory plate 31
The steering wheel within a range (adjustable range) where the lower stopper pin 38 or the upper stopper pin 39 contacts.
By tilting 14 to a new desired position, the following (a),
The original state of the steering wheel 14 can be adjusted as in (b).

(A). The first memory plate 31 is an upper stopper pin
When adjusting the original state of the steering wheel 14 within the range until it abuts 39.

In this case, as described in the operation in which the steering wheel 14 moves to the retracted state when the operation lever 22 is operated, the torsion spring 34 is connected to the connecting plate.
33, the relative rotation of the first memory plate 31 and the first memory plate 31 is elastically restricted, and the stopper spring 35 serves as the cam elongated hole 31b of the pin 20b.
In order to elastically limit the transition from the first region 31b1 to the second region 31b2 in, the connecting plate 33 and both memory plates 31, 32 remain integral. Therefore, if the steering wheel 14 is stopped at a desired position and the solenoid 26 is deactivated so that the operating lever 22 returns to its original position by the tension coil spring 25, as the operating lever 22 returns to its original position, First, the connecting plate 33 and the second memory plate 32 are moved in the radial direction (leftward in FIG. 2) by the tension coil spring 37, and the teeth 32 of the second memory plate 32 are moved.
b is disengaged from the claw 31c of the first memory plate 31,
Next, only the second memory plate 32 is rotated by the tension coil spring 37 to a position where it comes into contact with the lower stopper pin 38 to make the rotation angle zero, and the tooth portions of the pawls 20 and 21 are set to the ratchet 17 respectively. The steering wheel 14 cannot be tilted by meshing with the tooth portions of the teeth 18 and 18, and the adjustment is completed.

(B). The first memory plate 31 is the lower stopper pin
Within the range until it abuts 38 (if the stopper pin (not shown) provided on the upper bracket 13 is set to first engage the arc-shaped elongated hole (not shown) provided on the lower bracket 11, the range In) To adjust the original condition of the steering wheel 14.

In this case, in the operation state of the operation lever 22, the second
Since the memory plate 32 is in contact with the lower stopper pin 38, the memory plate 32 does not rotate in the direction (downward) to be adjusted.
Although the memory plate 31 does not rotate because the claw 31c engages with the tooth 32b of the second memory plate 32,
Connection plate accompanying tilting of the steering wheel 14
33 rotates with respect to the support shaft 12A and torsion spring 34
Bend the spring to increase its spring force. Therefore, if the steering wheel 14 is stopped at a desired position and the solenoid 26 is deactivated, the operating lever 22 is returned to its original position by the tension coil spring 25.
With the return to the original position, first, the connecting plate 33 and the second memory plate 32 are moved in the radial direction (left side in FIG. 2) by the tension coil spring 37, and the teeth 32b of the second memory plate 32 are moved. The claw 31c of the first memory plate 31 is disengaged, and then only the first memory plate 31 is rotated by the torsion spring 34 in the same direction (downward) as the connection plate 33 is rotated. Along with
The teeth of the pawls 20 and 21 mesh with the teeth of the ratchets 17 and 18 to make the steering wheel 14 incapable of tilting, and the adjustment is completed.

In the above embodiment, the operation lever 22 is rotated by the solenoid 26 so that the remote operation can be performed at a place where it is easy to operate, but as shown in FIG. It is also possible to integrally provide and to operate the operation lever 22 by hand.

Also, in the above embodiment, ratchets 17, 18 are provided on both sides.
Although the poles 20 and 21 and the operating levers 22 and 23 are provided, the present invention can be implemented by omitting the ratchet 18, the pole 21 and the operating lever 23. In this case, the teeth 32b of the second memory plate 32 start to engage with the claws 31c of the first memory plate 31 before the teeth 20a of the pole 20 are completely disengaged from the teeth 17a of the ratchet 17. Need to

Further, in the above embodiment, the pole 20 can be moved even after the teeth 32b of the second memory plate 32 are completely engaged with the claws 31c of the first memory plate 31 when the operation lever 22 is rotated. For this purpose, a long hole 33b is provided in the connecting plate 33. This is because the connecting pin 36 is fixed to the connecting plate 33 as shown in FIG. It is also possible to mount the retainer 43 shown in the figure so as to be movable in the longitudinal direction, and to stretch the tension coil spring 41 between the retainer 43 and the connecting pin 36 to carry out the operation. It should be noted that the above-described configuration is applied to the tooth 20 of the pole 20.
The teeth 32b of the second memory plate 32 start to engage with the claws 31c of the first memory plate 31 before a is completely disengaged from the teeth 17a of the ratchet 17, and the teeth of the second memory plate 32 are When the teeth 32a of the pole 20 are ratchet 1 when the teeth 32a of the first memory plate 31 are completely engaged with the hooks 31c of the first memory plate 31.
It can be eliminated by completely disengaging the tooth portions 17a of the seven.

Further, in the above embodiment, the tilt angle adjusting device according to the present invention is applied to the vehicle tilt steering device.
The device according to the present invention has a function of tilting the tilting body to the maximum tilt position with respect to the support and retracting the tilting body, and simply tilting the tilting body in the retracted state restores the tilting body to the original state before the retracting. It can be implemented in all kinds of devices that need the function and the function of adjusting the tilting body to a desired position with respect to the support body, and can of course be implemented in a vehicle reclining device.

〔The invention's effect〕

In short, in the device according to the present invention, the operation of the operation lever for bringing the tilting body into the retracted state and the operation of the operation lever for adjusting the tilting body to the desired position are exactly the same, and the operability is large. The width can be improved.

In addition, the operation lever is single, and the movement is movement from the original position to the operation position and vice versa, and it can be operated by using an electric actuator such as a solenoid of the operation lever. A low-priced manual type and an electrically-operated two type device, which is expensive but can be remotely operated and has excellent operability, can be configured without changing the basic configuration.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is an enlarged side view of the relevant part, FIG. 3 is a plan view of the same, and FIG. 4 is a partially cutaway side view of the pole shown in FIG. , FIG. 5 is a rear view of the same, FIG.
FIG. 7 is a front view of the operation lever shown in FIG. 2, FIG. 7 is a side view of the same, FIG. 8 is a front view of the operation lever shown in FIG. 3 and an upper operation lever, and FIG. 9 is shown in FIG. FIG. 10 is a front view of the first memory plate, FIG. 10 is a front view of the second memory plate shown in FIG. 2, FIG. 11 is a front view of the connecting plate shown in FIG. 2, and FIG. Fig. 13 is a front view of the torsion spring shown in Fig. 13, Fig. 13 and Fig. 14 are diagrams for explaining the operation of the main part, Fig. 15 is a diagram showing a modified example of the operation lever shown in Fig. 2, and Fig. 16 is a connecting pin, FIG. 17 is a front view, side view, and plan view of the retainer shown in FIG. 16, showing a modified example of the connecting plate, the tension coil spring, and the like. Explanation of symbols 10 …… Column tube (support), 11 …… Lower bracket, 12A …… Support shaft, 13 …… Upper bracket, 14 ……
Steering wheel (tilting body), 16 ... compression coil spring (first spring means), 17 ... ratchet, 20 ...
Pole, 22 ... Operating lever, 20b, 22b ... Pin, Cam long hole (first cam means), 25 ... Tensile coil spring (second spring means), 31 ... First memory plate, 20b, 31b
...... Pin, cam long hole (second cam means), 31b1 ...... first area, 31b2 ...... second area, 32 ...... second memory plate,
33 …… Connection plate, 34 …… Torsion spring, 35
...... Stopper spring, 37 …… Tension coil spring (3rd spring means), 38,39 …… Stopper pin.

Front Page Continuation (72) Inventor Hiroshi Sato 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (56) References JP 61-2809 (JP, A) JP 57-155156 (JP, A) JP-A-60-88680 (JP, A) Actually developed Shou 60-51176 (JP, U)

Claims (1)

[Claims] 1. A tilt angle adjusting device for adjusting a tilt angle of a tilting body, which is tiltably assembled to a supporting body, with respect to the supporting body, the first tilting device being connected to the supporting body or the tilting body. A bracket, a second bracket connected to the tilting body or the support, and a first bracket interposed between the second bracket and the first bracket for urging the tilting body to move to its maximum tilt position. A spring means; a pole rotatably assembled to the second bracket and detachably meshing with a ratchet provided on the first bracket;
An operation lever that is rotatably attached to a bracket and that is linked to the pawl via a first cam means to engage or disengage the ratchet and the pawl by pivoting; and to a state where the ratchet and the pawl are engaged. A second spring means for urging the operation lever in its rotation direction and a support shaft provided coaxially with the tilt center of the tilting body are rotatably assembled and the pole is provided via a second cam means. The second in cooperation with
In the first area of the cam means, the operation lever is allowed to rotate to allow the ratchet and the pawl to be engaged and disengaged, and in the second area, the operation lever is held at the rotation operation position to form the ratchet. A first memory plate that retains the dissociation of the pole, and a first memory pool that is assembled to the first memory pool to elastically limit the transition of the second cam means from the first area to the second area and vice versa. A stopper spring, a second memory plate that is mounted on the support shaft so as to be rotatable and movable in the radial direction, and that is integrally engaged with the first memory plate when moving in the radial direction;
A pair of stoppers that define the rotation amount of the memory plate and the first memory plate; and a second memory plate that urges the second memory plate in the radial direction to disengage the second memory plate from the first memory plate. Third spring means for urging in the rotation direction so as to make the rotation angle zero, and a third memory means mounted on the support shaft so as to be rotatable and movable in the radial direction, and integrally with the second memory plate in the radial direction. A connecting plate which is engaged with the rotating direction in a relatively rotatable manner, and which is connected to the pawl and is moved by the pawl; and a connecting plate which engages with the connecting plate and the first memory plate to rotate the plates in the rotating direction. A tilt angle adjusting device equipped with a torsion spring that urges the relative displacement to zero.