JPH0528151Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to, for example, a tilt steering device or a seat reclining device of a vehicle.
Tilting body (up shaft and steering wheel or seat bag) and support body (main shaft and column tube or seat cushion)
A function to tilt the seat to the maximum tilt position (upward in the case of a tilt steering device, forward in the case of a seat reclining device) and a function to return the tilting object in the retreated state to its original state before retreat. The present invention also relates to a tilt angle adjusting device that can be effectively used in various devices that require the ability to adjust a tilting body to a desired position relative to a support.

[Prior art]

A tail steering device having the above-mentioned functions is proposed in, for example, Japanese Utility Model Publication No. 17890/1983. However, 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.
In addition, by simply tilting the steering wheel in the retracted state downward, the steering wheel can be returned to its original state before retracting, and by rotating the control lever in its original position to its maximum operating position. The steering wheel can be adjusted to the desired position.

[Problem that the invention attempts to solve]

In the conventional device described above, the operation of the control lever required to retract the steering wheel upward is different from the operation of the control lever required to adjust the steering wheel to the desired position, so there is a risk of incorrect operation. There were many problems, and there was room for improvement.

In addition, in the conventional device described above, if the steering wheel in the retracted state is inadvertently tilted downward, the steering wheel will return to its original state, making it impossible to place a hand on the steering wheel when getting on or off the vehicle. First, the effect of placing the steering wheel in the retracted state is halved.

The present invention was devised in view of these circumstances, and its purpose is to improve operability and usability.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides the inclination angle adjustment device including: a first bracket connected to the support body or the tilting body; a second bracket connected to the tilting body or the support body; a first spring means interposed between the second bracket and the first bracket to urge the tilting body to move to its maximum tilt position; a pawl that releasably engages with a ratchet provided on the first bracket;
an operating lever which is rotatably assembled to the bracket and is linked to the pawl via a first cam means, and which can engage or disengage the ratchet and the pawl by rotation, and the ratchet and the pawl are brought into mesh with each other; a second spring means for biasing the operating lever in the rotational direction thereof; and a second cam means rotatably assembled to a support shaft provided coaxially with the tilting center of the tilting body. A first region of the second cam means linked to the pawl allows the operating lever to rotate, allowing the ratchet and pawl to engage and disengage, and a second region continuous to the first region allows the operating lever to rotate. The operation lever is held in the rotational operation position to maintain the dissociation of the ratchet and the pawl, and the rotation of the operation lever is allowed in a third region continuous with the second region to engage and disengage the ratchet and the pawl. a first memory plate that allows a first memory plate of the second cam means to be attached to the first memory plate;
a stopper spring that elastically limits the transition from one region to the second region and vice versa; a second memory plate that is integrally engaged with the first memory plate; a pair of stoppers that define the rotation amount of the second memory plate and the first memory plate; a third spring means for biasing the second memory plate in the rotational direction so as to disengage the second memory plate and to make the rotation angle zero; It is movably assembled and engages with the second memory plate integrally in the radial direction and relatively rotatably in the rotational direction, and is movable integrally with the pole in one direction and relatively movable in the other direction. a connecting plate that is connected to the pole and is moved integrally by rotation of the pole in the disengagement direction; and a connecting plate that engages with the first memory plate to prevent relative displacement of these plates in the rotational direction. a torsion spring that biases the connection plate to zero; and a memory support that is assembled to the first bracket and restricts movement of the connection plate in the radial direction when the tilting body is moved to the maximum tilt position. It was structured as follows.

[Effect of invention]

In the device according to the present invention, when the operating lever is rotated against the second spring means while the tilting body is fixedly held in a predetermined position (the original state of the tilting body), the pole is rotated. Then, the connecting plate and the second memory plate whose rotation angle is held at zero move integrally in the radial direction. For this reason,
The second memory plate engages with the first memory plate and becomes integral in the rotation direction, and the pawl and the ratchet are disengaged so that the tilting body can tilt.

When the tilting body is tilted toward its maximum tilt position by the first spring means in this operating state,
Until the first memory plate comes into contact with one of the stoppers, the torsion spring elastically restricts the relative rotation between the connecting plate and the first memory plate, and the stopper spring stops the first stopper of the second cam means. In order to elastically limit the transition from the area to the second area, the connecting plate and both memory plates rotate together, but the first memory plate abuts one of the stoppers and is restricted from rotating. Later, the connection plate rotates with the pawl etc. against the first memory plate and the second memory plate integral therewith, against the torsion spring and the stopper spring, so that the connection plate moves from the first area of the second cam means to the second memory plate. The tilting body moves to the second region and then to the third region, and the tilting body tilts to the maximum tilt position. Therefore, in the second region of the second cam means, even if the rotation operation of the operation lever is released, the operation lever is held at the rotation operation position, and the pawl and the ratchet are held in a disengaged state, and both The memory plates are held engaged and remain integral. By the way, in the third region of the second cam means, when the rotation operation of the operation lever is released (or if the rotation operation of the operation lever is released in advance), the operation lever is returned to its original position by the second spring means. When the pole is returned to the position, the pole engages with the ratchet, and the tilting body is fixed at the maximum tilt position so that it cannot tilt. Furthermore, when the tilting body is tilted to the maximum tilt position, the connecting plate is prevented from moving in the radial direction by the memory support and is held at the moving position, so that the second memory plate is also held at the moving position and the first memory plate is held at the moving position. It remains engaged with the plate.

In addition, when returning the tilting body that has been retracted to the maximum tilt position as described above to its original state, first rotate the operating lever to disengage the pole from the ratchet, and then return the tilting body to its original state. When tilting toward the state, the connecting plate first rotates relative to both memory plates by the action of the torsion spring, and the second cam means moves from the third region to the second region, and from the second region to the first region. After that, the connecting plate and both memory plates are rotated as one body mainly due to the action of the stopper spring.
In the second region of the second cam means, the pawl and the ratchet are held in a disengaged state, so the rotational operation of the operating lever is released in this state. Thus, when the second memory plate comes into contact with the other stopper and the rotation angle is maintained at zero, the second cam means moves from the second area to the first area against the action of the stopper spring. The connection plate and the second memory plate are moved in the radial direction by the third spring means, and the second memory plate is disengaged from the first memory plate (disengaged), and the operating lever is moved by the second spring. The pawl is returned to its original position by the means, and the pawl engages with the ratchet, and the tilting body is returned to its original state before retraction and is fixed.

On the other hand, in the operating state of the operating lever described above, that is, in the state in which the operating lever is rotated against the second spring means, the first memory plate is within the range (adjustable range) in which it comes into contact with one stopper or the other stopper. If the tilting body is tilted to a new desired position, the original state of the tilting body can be adjusted as shown in (a) and (b) below.

(a) When adjusting the original state of the tilting body until the first memory plate comes into contact with one of the stoppers.

In this case, when the operating lever is operated, the torsion spring elastically restricts the relative rotation of the connecting plate and the first memory plate, and The stopper spring elastically limits the transition of the second cam means from the first region to the second region, so that the coupling plate and both memory plates remain integral. Therefore, if the tilting body is stopped at a desired position and the operating lever is returned to its original position by the second spring means, as the operating lever returns to its original position, the connecting plate and the second
The memory plate is moved radially by the third spring means to disengage the second memory plate from the first memory plate, and then to a position where only the second memory plate abuts the other stopper by the third spring means. It is rotated to bring its rotation angle to zero, and the pawl engages with the ratchet to make the tilting body unable to tilt, completing the adjustment.

(b) When adjusting the original state of the tilting body until the first memory plate comes into contact with the other stopper.

In this case, when the operating lever is in operation, the second memory plate is in contact with the other stopper and cannot be rotated in the desired direction, and the first memory plate is not engaged with the second memory plate. However, as the tilting body tilts, the connecting plate rotates with respect to the support shaft, thereby bending the torsion spring to increase its spring force. Therefore, if the tilting body is stopped at a desired position and the operating lever is returned to its original position by the second spring means, as the operating lever returns to its original position, the connecting plate and the first 2
The memory plate is moved radially by the third spring means to disengage the second memory plate from the first memory plate, and then only the first memory plate is moved by the amount by which the coupling plate is rotated by the torsion spring. While being rotated by approximately the same amount in the same direction, the pawl engages with the ratchet, making the tilting body unable to tilt, and the adjustment is completed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 3 show a vehicle tail steering device equipped with an inclination angle adjusting device according to the present invention. In this tail steering device, a lower bracket 11 is fixed to the upper end of a column tube 10, An upper bracket 13 is attached to this lower bracket 11 via support shafts 12A and 12B.
is assembled so that it can be tilted vertically. Additionally, the Atsupa shaft 15 is provided with the Atsupa shaft 15 integrally equipped with the steering wheel 14 at the upper end.
is rotatably assembled, and the lower end of the upper shaft 15 is connected to the upper end of a main shaft (not shown) via a universal joint (not shown). In addition, the universal joint has support shafts 12A, 1
The upper bracket 13, the steering wheel 14, and the upper shaft 15 are arranged coaxially with the column tube 10 and the lower bracket 11, and are vertically tiltable with respect to the column tube 10 and lower bracket 11.

The inclination angle adjustment device is for both brackets 1 mentioned above.
1 and 13, a compression coil spring 16 is interposed between the brackets 11 and 13 and biases the steering wheel 14 to move to the maximum inclination position shown by the imaginary line in FIG. 1, and a lower bracket. a pair of left and right ratchets 17 for allowing or preventing tilting of the attachment bracket 13 relative to the bracket 11;
18, poles 20, 21 and operating levers 22, 2
It has 3. Each ratchet 17, 18 is fixed to the left and right sides of the lower bracket 11, respectively, and has arc-shaped teeth 17a centered on the support shafts 12A, 12B (the teeth of the ratchet 18 are not shown).
have.

Each of the poles 20, 21 is attached to a bolt 19 on the attenuator bracket 13, as shown in FIGS. 2 to 5.
A and 19B are used to rotatably assemble the toothed portion 20a that meshes with the toothed portion 17a of each ratchet 17 and 18 (the toothed portion of the pawl 21 is not shown).
have. Further, pins 20b and 21b are fixed to each of the poles 20 and 21.

Each operating lever 22, 23 is assembled to the upper bracket 13 using a connecting shaft 24, and is connected via the connecting shaft 24 so as to be integrally rotatable. One operating lever 22
As shown in FIGS. 6 and 7, a non-circular mounting hole 22a that is fitted into the connecting shaft 24;
The pin 20b of the pawl 20 is fitted with a cam elongated hole 22b constituting a cam means for rotating the pawl 20 with the pin 20b.
is fixed. This operating lever 22
As shown in the figure, the tension coil spring 25
It is configured such that it is biased clockwise in the drawing and rotated counterclockwise in the drawing via a link 27 by the operation of a solenoid 26 assembled to the upper bracket 13. The other operating lever 23, as shown in FIGS. 3 and 8,
A non-circular mounting hole 23 that fits into the connecting shaft 24
a and the pin 21b of the pole 21 fit together, and the same pin 21
It has a cam elongated hole 23b constituting a cam means for rotating the pawl 21 by means of the cam elongated hole 23b.

Note that both the cam elongated hole 22b of the operating lever 22 and the cam elongated hole 23b of the operating lever 23 are connected to the mounting hole 22.
A, a circular arc portion centered on 23a and the mounting hole 22
a, 23a, but they are formed in different shapes, and the teeth 20a of the pawl 20 and the teeth 17 of the ratchet 17.
After a is disengaged, the teeth of the pawl 21 and the teeth of the ratchet 18 are disengaged. Further, on the other operating lever 23 side, the pawl 22 is biased by a tension coil spring 28 in the direction of engagement with the ratchet 18.

Further, the inclination angle adjustment device includes a first memory plate 31 for controlling the rotation of the pole 20, a second memory plate 31 for controlling the rotation of the pole 20,
It includes a memory plate 32 and a connection plate 33. As shown in FIGS. 2 and 9, the first memory plate 31 has a circular mounting hole 31a.
It is rotatably assembled to the support shaft 12A at , and the amount of rotation is defined by a pair of stopper pins 38 and 39 fixed to the ratchet 17, and the cam length that constitutes the cam means with the pin 20b of the pawl 20. hole 31b and second memory plate 32
It has a claw 31c that selectively engages with the teeth 32b, and a bent portion 31d that engages with a torsion spring 34, which will be described later. The cam elongated hole 31b is formed in an arc shape centered on the mounting hole 31a, and includes a wide first region 31b1 that allows the ratchet 17 and the pawl 20 to engage and disengage, and a ratchet that is continuous with this and has a wide first region 31b1. The ratchet 17 and the pawl 20 are made up of a narrow second region 31b2 that maintains dissociation between the ratchet 17 and the pawl 20, and a wide third region 31b3 that is formed continuously with this and allows the ratchet 17 and the pawl 20 to engage and disengage. A stopper spring 35 is provided at the boundary between the first region 31b1 and the second region 31b2.
is installed. The stopper spring 35 is
It is a leaf spring fixed to the first memory plate 31, and the pin 20b of the pole 20 is connected to the cam elongated hole 31b.
It has a function of elastically restricting the transition from the first region 31b1 to the second region 31b2 or vice versa.

The second memory plate 32 is shown in FIG.
As shown in FIG. 0, an arc-shaped member is rotatably and radially movably attached to the support shaft 12A through the oval mounting hole 32a, and engages with the pawl 31c of the first memory plate 31. It has teeth 32b and an arcuate elongated hole 32c into which the connecting pin 36 fits. As shown in FIG. 2, this second memory plate 32 is biased clockwise and to the left in the figure by a tension coil spring 37, and is normally attached to a lower stopper pin 38 fixed to the ratchet 17. The rotation angle is set to zero when it comes into contact with the

As shown in FIGS. 2 and 11, like the second memory plate 32, the connection plate 33 is assembled to be rotatable and radially movable around the support shaft 12A through an oval attachment hole 33a. It is attached,
The long hole 33b into which the connecting pin 36 fits, and the pole 2
It has a long hole 33c into which the No. 0 pin 20b fits, and a bent portion 33d into which the torsion spring 34 engages. As shown in FIG. 2, this connecting plate 33 is connected to the pole 20 via a pin 20b, and is moved in the radial direction (longitudinal direction) by the rotation of the pole 20. It is biased toward the left in the figure by a tension coil spring 41 stretched between the protrusion 33e and the connecting pin 36, and is rotatable relative to the second memory plate 32 in the rotational direction and in the radial direction. Until the teeth 32b of the second memory plate 32 engage with the claws 31c of the first memory plate 31, they are integrally engaged, and when the coupling plate 33 moves further, they are engaged so as to be relatively movable. Therefore, the long hole 33c of the connecting plate 33 is connected to the steering wheel 1.
This is to enable the pole 20 and the operating lever 22 etc. to return to their original positions when the 4 etc. have moved to the maximum inclination position shown by the imaginary line in FIG.
In this state, the connecting pin 36 is attached to the stepped portion 4 of the memory support 42 fixed to the lower bracket 11.
2a, the movement of the connecting plate 33 in the radial direction is restricted.

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

In this embodiment configured as described above, the solenoid 26 is in the inactive state and the operation lever 22 is moved to the second position by the action of the tension coil spring 25.
If it is in the illustrated position (original position), the operating lever 22
As a result, the pawl 20 is held in the position shown in FIG. 2 via the pin 20b, and the teeth 20a of the pawl 20 and the teeth 17a of the ratchet 17 are held in a meshed state. Further, at this time, the pawl 21 is held in the same manner as the pawl 20 by the operation lever 23 which is connected to the operation lever 22 via the connection shaft 24, and the teeth of the pawl 21 and the teeth of the ratchet 18 are also held in a meshed state. be done. The meshing state between the teeth of the pawl 21 and the teeth of the ratchet 18 is also maintained by the action of the tension coil spring 28.
Therefore, the upper bracket 13 is securely fixed to the lower bracket 11, and the steering wheel 14 and the like are fixedly held in a predetermined position.

Therefore, in the state where the steering wheel 14 etc. are fixedly held in a predetermined position as described above (original state), the solenoid 26 is actuated to rotate the operating lever 22 against the tension coil spring 25. Then, as shown in FIG. 13, the pawl 20 is rotated by the operating lever 22 in the counterclockwise direction as shown in the figure via the pin 20b, and the connecting lever 33 is moved in the radial direction by the pin 20b, and at the same time, it is pulled The second memory plate 32 is moved in the radial direction via the coil spring 41 and the connecting pin 36 against the tension coil spring 37. Therefore, the teeth 32b of the second memory plate 32 engage with the claws 31c of the first memory plate 31 and become integral in the rotating direction, and the teeth 20a of the pawl 20 engage the teeth 1 of the ratchet 17.
The mesh is released from 7a and released. At this time, as the operating lever 22 rotates, the other operating lever 23 also rotates integrally, but the cam elongated hole 22b of the operating lever 22 and the cam elongated hole 23b of the operating lever 23 are formed in different shapes. The teeth 20a of the pawl 20 and the teeth 17 of the ratchet 17
After the teeth of the pawl 21 and the teeth of the ratchet 18 are disengaged, the teeth 32 of the second memory plate 32 are disengaged.
The poles 20, 21 do not separate from the ratchets 17, 18 before the pawls 31c of the first memory plate 31 complete their engagement. In addition,
After the teeth 32b of the second memory plate 32 complete engagement with the claws 31c of the first memory plate 31, the movement of the pole 20, the connecting plate 33, etc. is controlled by the elongated hole 33b provided in the connecting plate 33 and the tension coil spring 41. Tolerated by cooperative action.

In this state, the steering wheel 1
If there is no intention to adjust the position of the steering wheel 14 and the steering wheel 14 is not supported against the compression coil spring 16, the compression coil spring 16 will cause the suspension bracket 13, each member assembled thereto, the steering wheel 14, etc. is the 14th
It is tilted toward the maximum tilt position shown in the figure (so-called tilted away).

At this time, the torsion spring 34 elastically prevents the relative rotation between the connecting plate 33 and the first memory plate 31 until the first memory plate 31 contacts the upper stopper pin 39 and is restricted from rotating. The first stopper spring 35 in the cam elongated hole 31b of the pin 20b
In order to elastically limit the transition from the region 31b1 to the second region 31b2, the connecting plate 33 and both memory plates 31 and 32 rotate integrally, but the first memory plate 31 hits the upper stopper pin 33. After contacting and restricting rotation, the connecting plate 3 is connected to the first memory plate 31 and the second memory plate 32 integrated therewith.
3 rotates together with the pawl 20 etc. against the torsion spring 34 and the stopper spring 35, and the pin 20b rotates in the first region 31 of the cam elongated hole 31b.
The steering wheel 14 moves from b1 to the second region 31b2 and then to the third region 31b3, and the steering wheel 14 tilts to the maximum tilt position.

Therefore, when the pin 20b is in the second region 31b2, even if the solenoid 26 is deactivated and the rotation operation of the operation lever 22 is released, the operation lever 22 is held at the rotation operation position and the pole 20
and the ratchet 17 are held in a disengaged state, and both memory plates 31, 32 are held in an engaged state and remain integral. At this time, since the operating lever 23 is also held at its rotational operating position, the pawl 21 and the ratchet 18 are also held in a disengaged state.

By the way, when the pin 20b is in the third region 31b3, if the solenoid 26 is deactivated and the rotation operation of the operation lever 22 is released (or if the rotation operation of the operation lever 22 is released in advance), the operation lever 22 is returned to its original position by the tension coil spring 25, and the pawl 20 engages with the ratchet 17. Also, the operating lever 23 is also returned to its original position, and the pawl 21 engages with the ratchet 18, so that the steering wheel 14 is at its maximum inclination position. It is fixed so that it cannot be tilted. Furthermore, at this time, the second memory plate 32 also moves because the connecting plate 33 engages with the stepped portion 42a of the memory support 42 via the connecting pin 36 and is restricted from moving in the radial direction and held at the moving position. It is held in position and kept in engagement with the first memory plate 31.
(See Fig. 14) In addition, when returning the steering wheel 14 that has been retracted to the maximum tilt position as described above to its original state, the solenoid 26 is first activated and the operating levers 22 and 23 are rotated. Paul 20,
21 from the ratchets 17, 18 and tilt the steering wheel 14 toward its original state, the connecting plate 33 first rotates relative to both memory plates 31, 32 due to the action of the torsion spring 34. Then, the pin 20b moves from the third region 31b3 of the cam elongated hole 31b to the second region 3.
1b2 and from the second area 31b2 to the first area 3
1b1, and thereafter the connecting plate 33 and both memory plates 31, 32 are rotated as one body mainly due to the action of the stopper spring 35. Pin 20b is in second area 3
1b2, the poles 20, 21 and the ratchets 17, 18 are held in a dissociated state, so
In this state, the solenoid 26 is deactivated and the rotational operation of the operating levers 22 and 23 is released.

Thus, when the second memory plate 32 comes into contact with the lower stopper pin 38 and the rotation angle is maintained at zero, the pin 20b moves against the action of the stopper spring 35 and moves into the second region 31b of the cam elongated hole 31b.
2 to the first region 31b1, the connecting plate 33 and the second memory plate 32 are moved in the radial direction (to the left in FIG. 2) by the tension coil spring 37, and the teeth 32b of the second memory plate 32 are moved to the first region 31b1. At the same time as the claw 31c of the plate 31 is disengaged (disengaged), the operating lever 22 is returned to its original position by the tension coil spring 25, and the tooth 20a of the pawl 20 is moved to the ratchet 1.
7, the steering wheel 14 returns to its original state before being retracted and is fixed.

On the other hand, the operation state of the operation lever 22 described above, that is, the operation lever 22 is pulled by the coil spring 2
5 (the state shown in FIG. 13), the steering wheel 14 is rotated to a new position within the range (adjustable range) where the first memory plate 31 contacts the lower stopper pin 38 or the upper stopper pin 39. Once the steering wheel 14 is tilted to the desired position, move the steering wheel 14 as shown in (a) and (b) below.
The original state of can be adjusted.

(a) When adjusting the original state of the steering wheel 14 until the first memory plate 31 contacts the upper stopper pin 39.

In this case, when the operating lever 22 is operated, the torsion spring 34 elastically resists the relative rotation between the connecting plate 33 and the first memory plate 31, as described in the operation in which the steering wheel 14 moves to the retracted state. and the stopper spring 35 moves from the first region 31b1 to the second region 3 in the cam elongated hole 31b of the pin 20b.
In order to elastically limit the transition to 1b2, the connecting plate 33 and both memory plates 31, 32 remain integral. Therefore, the steering wheel 14 is stopped at a desired position and the solenoid 26 is turned off.
When the operating lever 22 is returned to its original position by the tension coil spring 25, the connecting plate 33 and the second memory plate 32 are first connected to the tension coil as the operating lever 22 returns to its original position. The spring 37 moves the tooth 32b of the second memory plate 32 in the radial direction (to the left in FIG. 2) to the claw 31c of the first memory plate 31.
Then, only the second memory plate 32 is rotated by the tension coil spring 37 to a position where it abuts the lower stopper pin 38, making the rotation angle zero, and each pole 20, 21 The teeth mesh with the teeth of each ratchet 17, 18, rendering the steering wheel 14 immobile and the adjustment completed.

(b) When adjusting the original state of the steering wheel 14 until the first memory plate 31 contacts the lower stopper pin 38.

In this case, when the operating lever 22 is operated, the second memory plate 32 is in contact with the lower stopper pin 38, so it cannot be rotated in the desired direction (downward), and the first memory plate 31 is not rotated by the stopper pin 38. 2nd memory plate 3 at 31c
Although the connection plate 33 does not rotate because it is engaged with the second tooth 32b, the connection plate 33 rotates with respect to the support shaft 12A as the steering wheel 14 tilts, causing the torsion spring 34 to increase its spring force. bend it to Therefore, the steering wheel 14 is stopped at a desired position and the solenoid 2
6 is deactivated and the operating lever 22 is returned to its original position by the tension coil spring 25. As the operating lever 22 returns to its original position, the connecting plate 33 and the second memory plate 32 are first moved.
is moved in the radial direction (second direction) by the tension coil spring 37.
left side of the figure) and the second memory plate 32
The teeth 32b are the claws 31 of the first memory plate 31.
Then, only the first memory plate 31 is rotated by the torsion spring 34 in the same direction (downward) by approximately the same amount as the rotation of the connecting plate 33, and each pole 2
The teeth 0 and 21 mesh with the teeth of each ratchet 17 and 18, making the steering wheel 14 immobile and the adjustment completed.

In the above embodiment, the control lever 22 is rotated by the solenoid 26 so that remote control can be performed at an easily accessible location.
As shown in the figure, a knob 43 is attached to the operating lever 22.
It is also possible to provide a structure in which the control lever 22 is integrally provided and the operating lever 22 is rotated by hand.

In the above embodiment, the ratchets 17 and 18, the pawls 20 and 21, and the operating lever 2 are provided on both sides.
Although the ratchet 18, the pawl 21, and the operating lever 23 are omitted, the present invention may be practiced. In this case, pole 20
It is necessary that the teeth 32b of the second memory plate 32 begin to engage the pawls 31c of the first memory plate 31 before the teeth 20a of the ratchet 17 are completely disengaged from the teeth 17a of the ratchet 17.

Furthermore, in the above embodiment, the operating lever 22
In order to allow the pawl 20 to move even after the teeth 32b of the second memory plate 32 complete engagement with the claws 31c of the first memory plate 31 during rotation, a long hole 33b is formed in the connecting plate 33. As shown in FIG. 16, the connecting pin 36 is fixed to the connecting plate 33, and the retainer 44 shown in FIGS. 17 to 19 is moved to the connecting plate 33 in the longitudinal direction. It is also possible to install the tension coil spring 41 in tension between the retainer 44 and the connecting pin 36. Note that the above configuration is based on the pole 2
The teeth 32b of the second memory plate 32 are engaged with the first memory plate 31 before the teeth 20a of the second memory plate 32 are completely disengaged from the teeth 17a of the ratchet 17.
When the tooth portion 32b of the second memory plate 32 has completed engagement with the pawl 31c of the first memory plate 31, the pawl 2
By completely disengaging the teeth 20a of the ratchet 17 from the teeth 17a of the ratchet 17,
It is possible to eliminate it.

Further, in the above embodiment, the tilt angle adjustment device according to the present invention was implemented in a vehicle tilt steering device, but the device according to the present invention tilts the tilting body to the maximum tilt position with respect to the support body and retreats. The present invention can be implemented in all types of devices that require a function, a function to return a tilting body in a retracted state to its original state before retraction, and a function to adjust the tilting body to a desired position with respect to a support. Of course, it can also be implemented in a reclining device for a vehicle.

[Effect of idea]

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

In addition, the operating lever may be a single lever, and the movement thereof is from the original position to the operating position and vice versa, and the operating lever may be operated using an electric actuator such as a solenoid. Two types of devices can be constructed without changing the basic configuration: an inexpensive manual type device and an expensive electric type device that can be remotely controlled and has extremely good operability.

Furthermore, when the tilting body tilts to the maximum tilt position,
The pole can be engaged with the ratchet while maintaining the engagement of both memory plates, and the tilting body can be fixed at the maximum tilt position without being able to tilt. However, the tilting body does not move, greatly improving usability.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is an enlarged side view of the same main part, Figure 3 is a plan view of the same, and Figure 4 is an enlarged side view of the same main part.
The figures are a partially broken side view of the pole shown in Fig. 2, Fig. 5 is a rear view of the same, Fig. 6 is a front view of the operating lever shown in Fig. 2, Fig. 7 is a side view of the same, and Fig. 8 is a side view of the pole shown in Fig. 2. is the third
Front view of the upper operating lever shown in the figure, No. 9
The figure is a front view of the first memory plate shown in FIG. 2, FIG. 10 is a front view of the second memory plate shown in FIG. 2, and FIG. 11 is a front view of the connection plate shown in FIG. Figure 12 is a front view of the torsion spring shown in Figure 2, Figures 13 and 14.
15 is a diagram showing a modification of the operating lever shown in FIG. 2, FIG. 16 is a diagram showing a modification of the connecting pin, connecting plate, tension coil spring, etc. Figure 17, Figure 18 and Figure 19
The figures are a front view, a side view, and a plan view of the retainer shown in FIG. 16. Explanation of symbols, 10... Column tube (support body), 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, 20
b, 22b...pin, cam elongated hole (first cam means),
25... tension coil spring (second spring means),
31...first memory plate, 20b, 31b
...Pin, cam slot (second cam means), 31b1
...First area, 31b2...Second area, 31b3
...Third area, 32...Second memory plate,
33... Connection plate, 34... Torsion spring, 35... Stopper spring, 36...
Connection pin, 37... tension coil spring (third
spring means), 38, 39... stopper pin, 42
...Memory support.

Claims (1)

[Scope of utility model registration request] This is a tilt angle adjustment device for adjusting the tilt angle of a tilting body mounted so as to be tiltable with respect to the support body, the first bracket being connected to the support body or the tilting body, and the tilting body. a second bracket connected to the body or support; a first spring means interposed between the second bracket and the first bracket to urge the tilting body to move to its maximum tilt position; a pawl that is rotatably assembled to the second bracket and releasably engages with a ratchet provided on the first bracket;
an operating lever which is rotatably assembled to the bracket and is linked to the pawl via a first cam means, and which can engage or disengage the ratchet and the pawl by rotation, and the ratchet and the pawl are brought into mesh with each other; a second spring means for biasing the operating lever in the rotational direction thereof; and a second cam means rotatably assembled to a support shaft provided coaxially with the tilting center of the tilting body. A first region of the second cam means linked to the pawl allows rotation of the operating lever to allow engagement and disengagement of the ratchet and pawl, and a second region continuous to the first region allows the operating lever to rotate. The operation lever is held in the rotation operation position to maintain the dissociation of the ratchet and the pawl, and the rotation of the operation lever is allowed in a third region continuous with the second region to engage and disengage the ratchet and the pawl. a first memory plate that allows a first memory plate of the second cam means to be attached to the first memory plate;
a stopper spring that elastically restricts the transition from one region to the second region and vice versa; a second memory plate that is integrally engaged with the first memory plate; a pair of stoppers that define the rotation amount of the second memory plate and the first memory plate; a third spring means for biasing the second memory plate in the rotational direction so as to disengage the second memory plate and to make the rotation angle zero; It is movably assembled and engages with the second memory plate integrally in the radial direction and relatively rotatably in the rotational direction, and is movable integrally with the pole in one direction and relatively movable in the other direction. a connecting plate that is connected to the pole and is moved integrally by the rotation of the pole in the disengagement direction; and a connecting plate that engages with the first memory plate to prevent relative displacement of both plates in the rotational direction. a torsion spring that biases the connection plate to zero; and a memory support that is assembled to the first bracket and restricts movement of the connection plate in the radial direction when the tilting body is moved to the maximum tilt position. Tilt angle adjustment device.