JP2002233426A - Reclining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the accuracy of an operation for performing respective functions and the easiness of the operation by making both functions selectable by one operation means when appropriately selecting an angle adjustment func tion or a holding movement function and performing both functions. SOLUTION: This reclining device is provided with an operation mechanism (10 and 20) having both of a function of adjusting the inclination angle in a front-to-back direction of a seat back to a seat cushion in a prescribed angle range and a function of folding the seat back forwards over the adjustment angle range and an operation means 34 for operating the operation mechanism and selectively performing both functions. The operation means 34 is provided with mutually different operation directions and the respective functions of the operation mechanism are selected by selecting the operation direction of the operation means 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a reclining device for forming a reclining seat.

[0002]

2. Description of the Related Art As one type of a reclining device, as disclosed in Japanese Patent Application Laid-Open No. H11-70028, an angle having a function of adjusting a tilt angle of a seat back with respect to a seat cushion in a front-rear direction within a predetermined angle range. An adjusting mechanism and a tilting movable mechanism having a function of tilting the seat back forward beyond the adjustment angle range are provided. When desired, the angle adjusting mechanism is operated to set a tilt angle of the seat back with respect to the seat cushion in the front-rear direction. There is a reclining device of a type in which the seat back is tilted to the maximum by moving the seat back forward as much as possible by adjusting the angle within the range of the angle and, when desired, operating the tilting movable mechanism.

[0003]

The reclining device of this type has a dedicated operating mechanism for operating the angle adjusting mechanism and the tilting movable mechanism, respectively.
If you want to operate the angle adjustment mechanism, operate the operating means (handle, lever) of the special operation mechanism of the angle adjustment mechanism to make the angle adjustment mechanism function, and if you want to operate the tilting movable mechanism The operation mechanism (handle, lever) of the operating mechanism dedicated to the falling movable mechanism is configured to function as the falling movable mechanism.

For this reason, in the reclining device of this type, when it is desired to selectively function the angle adjusting mechanism and the tilting movable mechanism, it is necessary to select each operating means of the operating mechanism independent of each other. If the user is unfamiliar, it is difficult to properly select the operation means, and since these operation means are located apart from each other, it is troublesome to operate.

Accordingly, an object of the present invention is to provide a structure in which one function can be used to select both functions when an angle adjusting function and a tilting movable function are appropriately selected and operated as in a reclining device of this type. Accordingly, it is possible to improve the accuracy and operability of the operation for exhibiting each function.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a reclining device, and more particularly, to a reclining device for adjusting a tilt angle of a seat back with respect to a seat cushion in a front-rear direction within a predetermined angle range. An operating mechanism having both functions of a function of causing the back to fall forward beyond the adjustment angle range, and a reclining device including an operating means for operating the operating mechanism to selectively exert the two functions, The operation means has different operation directions from each other, and each function of the operating mechanism can be selected by selecting the operation direction of the operation means.

[0007] In the reclining device according to the present invention, an angle adjusting mechanism having a function of adjusting the inclination angle of the seat back in the front-rear direction within a predetermined angle range, and The operating means is rotated in directions opposite to each other about an axis, and the angle adjusting mechanism and the tilting mechanism are turned in accordance with the turning operation direction. It is possible to adopt a configuration formed by an operation shaft which is selectively connected to the movable mechanism and operates.

In this case, the operating mechanism is provided in a space formed by connecting a fixed housing attached to the seat cushion side and a movable housing fixed to the seat back side in a superposed state. In the space formed by the fixed housing and the movable housing, a partition for dividing the space into the fixed housing and the movable housing is provided, and the partition space defined by the partition is provided in each of the partition spaces. It is possible to adopt a configuration in which the angle adjusting mechanism and the falling movable mechanism are respectively provided.

In the reclining device according to the present invention, the angle adjusting mechanism is engaged with arcuate internal teeth provided on an annular peripheral wall of a circular recess of one of the two housings. A pawl, which is held in a guide groove provided on the housing side so as to be able to advance and retreat with respect to the internal teeth, and presses and engages the pawl against the internal teeth side and releases the pressing on the pawl during operation. A configuration may be provided that includes an operating member that releases the meshing state with the internal teeth.

[0010] In the reclining device according to the present invention, the fall-down movable mechanism can mesh with the arc-shaped internal teeth provided on the annular peripheral wall portion of the circular recess of the other housing of the two housings. A pawl held in the guide groove provided on the housing side so as to be able to advance and retreat with respect to the internal teeth, and the pawl is pressed against the internal teeth side to engage with the pawl, and at the time of operation, the pressing on the pawl is released. An operating member for releasing the meshing state with the internal teeth is provided, and each operating member of the angle adjusting mechanism and the falling movable mechanism is rotated with respect to the same operating shaft as operating means. It is possible to adopt a configuration in which it is formed so as to be selectively disengaged according to the moving operation direction.

In these cases, cams for moving the pawls forward and backward are employed as the operating members constituting the angle adjusting mechanism and the tilting movable mechanism, and the cams are fitted to the outer periphery of the operating shaft. Then, it can be configured to be selectively engaged and disengaged according to the rotation operation direction of the operation shaft, and except for the inner hole shape of the cam that fits the operation shaft,
The same components can be employed.

[0012]

In the reclining device according to the present invention, the angle adjusting function and the tilting movable function can be selectively exhibited by the same operating means.
Selection of both functions can be performed by selecting the operation direction of the operation means. For this reason, it is easy to select the operation means at the time of selecting both functions, and the selective operation can be performed accurately.

The reclining device is, specifically,
The actuation mechanism includes an angle adjustment mechanism having a function of adjusting a front-back inclination angle of a seat back in a predetermined angle range, and a tilting movable mechanism having a function of tilting a seat back forward beyond an adjustment angle range. While forming
A configuration is adopted in which the operation means is formed by an operation shaft that rotates in directions opposite to each other around the axis and selectively operates in accordance with the rotation operation direction with the angle adjustment mechanism and the falling movable mechanism. Can be.

In this aspect, the operating mechanism is arranged in a space formed by connecting a fixed housing attached to the seat cushion side and a movable housing fixed to the seat back side in a superposed state. And
In the space defined by the fixed housing and the movable housing, a partition is provided to partition the space into the fixed housing and the movable housing, and the partition space defined by the partition has the angle. If the adjusting mechanism and the falling movable mechanism are arranged respectively, the reclining device having both the angle adjusting function and the falling movable function can be compactly configured, and the weight of the device can be reduced. it can.

Further, in this aspect, the angle adjusting mechanism is provided with an arc-shaped internal tooth provided on an annular peripheral wall portion of a circular recess of one of the two housings, and the angle adjusting mechanism can be engaged with the internal tooth on the same housing side. A pawl held in the guide groove provided so as to be able to advance and retreat with respect to the internal teeth, and an operating member for pressing the pawl toward the internal teeth to mesh with the pawl and releasing the pressing against the pawl during operation to release the meshing state with the internal teeth In the same manner, the falling movable mechanism is provided with an arc-shaped internal tooth provided on the annular peripheral wall portion of the circular recess of the other housing of both housings, and the internal tooth can be meshed with the internal tooth. The pawl, which is held in the guide groove provided on the internal gear so that it can advance and retract with respect to the internal teeth, presses the pawl toward the internal teeth and engages it. The operating members of these two mechanisms are selectively engaged and disengaged with respect to the same operating shaft as operating means in accordance with the rotational operation direction of the operating shaft. Can be formed.

According to such a configuration, it is possible to provide a reclining device capable of properly exhibiting the angle adjusting function and the tilting movable function, and at the time of returning from the tilted state of the seatback, to the locking position immediately before the seatback is tilted. , A function that can automatically return to the normal state, a so-called memory function.

In this aspect, a cam for moving each pole forward and backward is employed as each of the operating members constituting the angle adjusting mechanism and the tilting movable mechanism, and the cam is fitted to the outer periphery of the operating shaft. It can be configured to be selectively engaged and disengaged according to the rotating operation direction of the operating shaft. Thereby, the angle adjusting function and the tilting movable function can be accurately exhibited, and the same components as the angle adjusting mechanism and the tilting movable mechanism except for the inner hole shape in which the operation shaft of the cam is fitted. There is a great advantage that these components can be adopted, and the assemblability of each component can be improved, and the cost can be reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a reclining device according to an example of the present invention, FIG. 2 is a partially omitted front view of the reclining device viewed from the direction of arrow 2 in FIG. 1, and FIG. 3 is an angle adjusting mechanism constituting the reclining device. Exploded perspective view, FIG.
FIG. 3 is an exploded perspective view of a falling movable mechanism that constitutes the reclining device.

The reclining device R is provided with an angle adjusting mechanism 10 and a falling movable mechanism 20. The angle adjusting mechanism 10 and the tilting movable mechanism 20 constitute an operating mechanism of the present invention integrally.
Many of the main components 0, 20 are fixed housing 15
And the movable housing 25 is disposed in a space formed by the movable housing 25. In the reclining device R,
There are a plurality of types of components constituting the angle adjusting mechanism 10 and the falling movable mechanism 20 which are shared by the two mechanisms 10 and 20. The components shared by the two mechanisms 10 and 20 are provided for convenience. In the following, description will be made by attaching reference numerals in the thirties.

The angle adjusting mechanism 10 constituting the reclining device R includes a pair of pawls 11 and a slide cam 1.
2, a rotating cam 13, a connecting arm 14, and a movable housing 15, and holding plates 31 and 4
The guide blocks 32 are provided. Further, the falling movable mechanism 20 includes a pair of pawls 21, a slide cam 22, a rotating cam 23, a spiral spring 24, and a fixed housing 25, and further includes a holding plate 31 and four guide blocks 32. Further, both of the mechanisms 10 and 20 include a set plate 33, which is a common component, and an operation shaft 34 and an operation lever 35. In the reclining device R constituting the common operation mechanism of the angle adjusting mechanism 10 and the tilting movable mechanism 20, the operating shaft 34 and the operating lever 35 are configured such that the movable housing 15 and the fixed housing 25 are overlapped to face each other, By caulking the outer peripheral edge of the set plate 33 fitted from the housing 15 side, they are integrally connected. The pawls 11 and 21, the slide cams 12 and 22, the rotating cams 13 and 23, the connecting arm 14, and the spiral spring 24 are accommodated in a space defined by the fixed housing 15 and the movable housing 25.
These components are supported directly on an operation shaft 34 that passes through the center of the components, or indirectly via the components. An operation lever 35 is attached to an outer end of the operation shaft 34.

In the reclining device R, the movable housing 15 is assembled to an upper arm A1 attached to the lower end of the seat back, and the fixed housing 25 is assembled to a lower arm A2 attached to the rear end of the seat cushion. In addition, the seat back is supported on the seat cushion so as to be rotatable in the front-rear direction, thereby constituting a reclining seat.

The movable housing 15 constituting the reclining device R has a disk shape. As shown in FIGS. 1 to 3, the movable housing 15 includes a stepped circular recess 15b inside a disk-shaped housing body 15a. A pair of arc-shaped internal teeth 15c is formed on the inner periphery of the small-diameter annular portion inside the circular recess 15b while maintaining a predetermined circumferential interval. Each internal tooth 1
The housing main body 15a having the angle adjusting mechanism 1c
0 constitutes a ratchet. Further, the fixed housing 25 has a disk shape like the movable housing 15, and as shown in FIGS. 1, 2 and 4, a stepped circular recess 25b is provided inside a disk-shaped housing body 25a. A pair of arc-shaped internal teeth 25c are formed vertically on the inner periphery of the small-diameter annular portion inside the circular recess 25b while maintaining a predetermined circumferential interval. The housing main body 25 a having each of the internal teeth 25 c constitutes a ratchet of the falling movable mechanism 20. In these housings 15, 25, each of the housing bodies 15a, 25a is formed in such a size that, when they are overlapped with each other, the housing body 25a just fits into the opening of the circular recess 15b of the housing body 15a.

The holding plate 31 is a disk-shaped plate having a predetermined thickness and functions as a partition in the present invention. The holding plate 31 forms a space formed by overlapping the movable housing 15 and the fixed housing 25 with the movable housing 15. And the fixed housing 25 side. The holding plate 31 has a large-diameter circular hole 31b at the center of a disk-shaped plate main body 31a, and four fan-shaped fitting holes 31c are formed on the same circumference on the outer peripheral side of the circular hole 31b. Each of them is formed while maintaining a predetermined circumferential interval.

Each of the guide blocks 32 includes a holding plate 3
1 has a thickness several times larger than the thickness of each fitting hole 31.
c is formed in a fan shape similar to that of each fitting hole 31c.
And penetrates through the plate body 31a. When the holding plate 31 is sandwiched between the housings 15 and 25 and is disposed in the space formed by the housings 15 and 25, one end of the guide block 32 projects toward the movable housing 15 and the guide block 32 has a circular shape. Recess 15b
And the other end protrudes toward the fixed housing 25 side and abuts against the inner wall of the circular recess 25b of the housing 25.

In this state, each guide block 32 has a cross-shaped guide groove formed around the circular hole 31b of the holding plate 31 on the fixed housing 15 side and the movable housing side 25. The pawl 11 and the slide cam 12 constituting the angle adjusting mechanism 10 are fitted into the guide grooves of the fixed housing 25.
The pawl 21 and the slide cam 22 that constitute the falling movable mechanism 20 are fitted in the guide grooves on the side.

Each of the poles 11 and 21 has a gate shape, has external teeth 11a and 21a on the tip side, and has a rear end opposite to the external teeth 11a and 21a (in the assembled state, on the radially inner side). ) Is provided with a pair of left and right legs 11b, 21b, and one of the legs 11b, 21b is attached to the other leg 11b, 21b.
Engagement projections 11c, 21c protruding toward the 21b side are formed. The external teeth 11a, 21a of the poles 11, 21 are
Each of the housings 15 and 25 is configured to mesh with the internal teeth 15c and 25c.

The slide cams 12, 22 are provided with engaging projections 12b, 22b at the center of the upper and lower edges of the rectangular plate bodies 12a, 22a.
The receiving cam portions 12c and 22c are provided on the left and right sides of the receiving cam portions 12b and 22b. The plate body 12
a, 22a, pivot cams 13, 23 to be described later.
Are provided with fitting holes 12d and 22d. Each of the fitting holes 12d and 22d has a horizontally long substantially elliptical shape, and a pair of engaging grooves 12d1 and 12d1 protruding from the outer periphery of the hole.
12d2, 22d1, 22d2, and each of the engagement grooves 12d1, 12d2, and each of the engagement grooves 22d1, 22d2.
Are located 180 degrees from each other. The slide cams 12 and 22 are slidably fitted in the cross portions of the guide grooves on the housings 15 and 25 side crosswise.

Each of the pawls 11 and 21 is connected to each of the slide cams 1.
Each of the leg portions 1 and 2 is slidably fitted in the upper and lower portions of the crossing portion of each guide groove in the up and down direction.
At 1c and 21c, the slide cams 12 and 22 receive the cams 12c and 22c. Each pole 11,2
1, in this assembled state, the engagement protrusions 11c,
21c is the engaging projection 12b of the slide cams 12, 22;
22b.

The rotating cams 13 and 23 are, as shown in particular in an enlarged manner in FIG. 5, a cylindrical tubular portions 13a and 23a and a cylindrical portion 1a.
3a, 23a, engagement arm portions 13b formed on the outer peripheral side,
23b. Inner holes 13c and 23c of both cylindrical portions 13a and 23a are circular holes 1 that coaxially oppose each other.
3c1, 23c1 as the main body, and circular holes 13c1,
An arc-shaped engaging groove 1 having a predetermined width and a predetermined length is formed on the outer periphery of 23c1.
3c2 and 23c2. Engagement grooves 13c2, 23c2
Is located on the engaging arm 13b in the rotating cam 13, and is located on the opposite side of the rotating cam 23, which is displaced by approximately 180 degrees from the engaging arm 23b. Rotating cam 13,
The 23 is loosely fitted and supported on the outer periphery of the operation shaft 34.

The operating shaft 34 has a cross-sectional shape similar to the inner holes 13c and 23c of the rotary cams 13 and 23, and has an arc-shaped engaging projection 34b of a predetermined width and a predetermined length on the outer periphery of the cylindrical portion 34a. It has. Engagement projection 34b of operation shaft 34
Are formed shorter than the engaging grooves 13c2, 23c2 of the inner holes 13c, 23c of the rotating cams 13, 23 by a predetermined length.

The operating shaft 34 is inserted through the inner holes 13c and 23c of the two rotating cams 13 and 23, respectively.
3 is supported in a loosely fitted state.
In this loosely fitted state, the engagement arms 13b and 23b are positioned so as to be offset from each other by approximately 180 degrees,
22 are fitted in the fitting holes 12d and 22d. In this fitted state, the engagement arm 13b of the rotary cam 13 is located in one engagement groove 12d1 of the slide cam 12,
The engaging arm 23b of the rotating cam 23 is located in the other engaging groove 22d2 of the slide cam 22. That is, the engagement arms 13b, 2 of the two rotating cams 13, 23
3b is an engagement groove portion 12d that is deviated from each other by 180 degrees.
It is located at 1,22d2.

The spiral spring 24 has a predetermined number of turns. The inner end 24a is wound in a rectangular shape, and the outer end 24b protrudes outward. The inner end portion 24a is formed so as to be able to just fit on the outer periphery of one end portion of the circular cylindrical portion 23c of the rotating cam 23, and the outer end portion 24b can be hooked on a part of the holding plate 31. It is formed as follows. The connecting arm 14 is loosely fitted on the outer periphery of the operating shaft 34 and is connected to the rotating cam 13 and the spiral spring 24 as shown in FIG. The connecting arm 14 transmits the biasing force of the spiral spring 24 to the rotating cam 13. Therefore, the spiral spring 24 constantly urges the two rotating cams 13 and 23 in the counterclockwise direction in FIG.

The set plate 33 is provided with a tubular portion 33b on the outer peripheral edge of an annular plate body 33a.
In a state where the fixed housing 25 is overlapped with the movable housing 15, the size is formed so as to fit from the fixed housing 25 side to the outer peripheral side of the movable housing 15. When the set plate 33 is fitted to the movable housing 15 and the fixed housing 25, as shown in FIG. 1, the distal end of the cylindrical portion 33b is swaged to connect the two housings 15, 25 to each other. .

These components are assembled in the following order, for example, to constitute a reclining device R having the structure shown in FIGS. That is, a rotation plate in which the rotating cam 23, the slide cam 22, both pawls 21, the spiral spring 24, the holding plate 31 in which each guide block 32 is fitted, and the connecting arm 14 are connected on the operating shaft 34 penetrating the fixed housing 25. The moving cam 13, the slide cam 12, the pawls 11, and the movable housing 15 are assembled in this order, and then the set plate 33 is fitted to the outer periphery of the movable housing 15 from the fixed housing 25 side, and the cylindrical portion 33 b of the set plate 33 Is crimped as shown in FIG. Thereby, the reclining device R is assembled.

In the reclining device R, as shown in FIGS. 1 and 2, the movable housing 15 is mounted on the upper arm A1, the fixed housing 25 is mounted on the lower arm A2, and the operating lever is mounted on the operating shaft 34. 35, a spiral spring 36 is assembled. The reclining seat is formed by attaching the lower arm A2 to the rear end of the seat cushion and attaching the upper arm A1 to the lower end of the seat back.

In this assembled state, the inner end 24a of the spiral spring 24 is
a on the end of the connecting plate 14
The connecting arm 14 connects the spiral spring 24 to the rotating cam 13.

The slide cam 12 is disposed so as to be slidable in the lateral direction in a guide groove on the movable housing 15 side formed by each of the guide blocks 32 fitted to the holding plate 31, and is fitted to the rotary cam 13 outside. Each of the pawls 11 is located at a position above and below the rotary cam 13 in the guide groove so as to be slidable in the radial direction. In this state, as shown in FIG. 6, the engagement arm portion 13b of the rotation cam 13 is fitted in one engagement groove 12d1 of the slide cam 12. Also,
The rotating cam 13 is urged in the counterclockwise direction in the figure by the urging force of the spiral spring 24, and pushes the slide cam 12 to the left in the figure.

The slide cam 22 is disposed slidably in the lateral direction in a guide groove on the fixed housing 25 side formed by each of the guide blocks 32 fitted on the holding plate 31, and externally fits on the rotary cam 23. Each of the pawls 21 is slidably positioned in the guide groove at a position above and below the rotary cam 23 in a radial direction. In this state, as shown in FIG. 7, the engagement arm 23b of the rotary cam 23 is fitted in the other engagement groove 22d2 of the slide cam 22. Also,
The rotating cam 23 is urged in the clockwise direction in the figure by the urging force of the spiral spring 24, and pushes the slide cam 22 to the left in the figure.

In this assembled state, each pawl 11 is received by each of the receiving cam portions 12c of the slide cam 12 at both legs 11b, and the engaging projection 11c is engaged with the slide cam 12 by the engaging protrusion 11c. It faces the mating projection 12b in a state where it is separated. The slide cam 12 slides to the left in the drawing, receives each leg 11b of each pawl 11 by a convex portion of each receiving cam part 12c, and advances each pawl 11 to move the inside of the movable housing 15. It is engaged with a part of the teeth 15c. The internal teeth 15c of the movable housing 15 are formed to be long so that the inclination angle of the seat back in the front-rear direction can be adjusted within a predetermined angle range.

Each of the pawls 21 is received by each of the receiving cam portions 22c of the slide cam 22 at both leg portions 21b, and the engaging protrusions 21c are engaged with the engaging protrusions 22 of the slide cam 22.
b. Slide cam 22
Slides to the left in the figure, receives each leg 21b of each pawl 21 by the convex portion of each receiving cam portion 22c, and advances each pawl 21 to move the internal teeth 25c of the fixed housing 25.
Is engaged. The internal teeth 2 of the fixed housing 25
5c is formed in a short length so that each of the pawls 21 can be easily engaged without any direct relation to the adjustment of the inclination angle of the seat back in the front-rear direction, and the adjacent portions of the internal teeth 25c are all free zones. ing.

Next, the operation of the reclining device R will be described with reference to FIGS. However, FIG.
FIG. 4 is a front view explanatory diagram showing an operational relationship between the pawl 11, the slide cam 12, and the rotating cam 13 and the operation lever 35 and the operation shaft 34 in the angle adjusting mechanism 10,
This shows a non-operation state. FIG. 7 shows a pole 21, a slide cam 22, and a rotating cam 2 in the falling movable mechanism 20.
3 is an explanatory front view showing an operation relationship between the control lever 3 and an operation lever 35 and an operation shaft 34, and shows a non-operation state. FIG. FIG. 8 is a schematic diagram for explaining the relationship between the operation shaft 34 and each of the rotary cams 13 and 23 when the angle adjusting mechanism 10 is operated. FIG. 9 is a schematic diagram illustrating the operation shaft 34 and each time when the tilt movable mechanism 20 is operated. FIG. 3 is an explanatory front view showing a relationship with moving cams 13 and 23.

In the reclining device R, when the operating lever 35 is in the non-operating state, the operating lever 35 is in the neutral position, and the pawl 11, the slide cam 12, and the rotating cam 13 in the angle adjusting mechanism 10 are in the state shown in FIG. In
Further, the pawl 21, the slide cam 22, and the rotating cam 23 in the falling movable mechanism 20 are in a state shown in FIG.
That is, the pole 11 of the angle adjusting mechanism 10 meshes with the internal teeth 15c of the movable housing 15, and
At 0, the pawl 21 is engaged with the internal teeth 25c of the fixed housing 25, and these engaged states are connected to each other via a holding plate 31 in which a block 32 is fitted. Therefore, the movable housing 15 and the fixed housing 25 are in a locked state, and the seat back is locked to the seat cushion.

When the operation lever 35 is not operated, the relationship between the rotating cam 13 of the angle adjusting mechanism 10 and the operation lever 34 is changed to the state shown in FIGS. 8A and 9A. FIG. 8C and FIG. 9C show the relationship between the rotating cam 23 and the operation lever 34 of the falling movable mechanism 20.
The relationship is shown in That is, the rotating cam 13 is
4 is in contact with the right end of the engagement projection 34b, and the rotating cam 23 is in contact with the left end of the engagement projection 34b of the operation shaft 34.

In the reclining device R, when the front-back tilt angle of the seat back with respect to the seat cushion is adjusted to a desired tilt angle, the operation lever 3 is used.
5 is rotated in the direction of arrow 6 shown in FIG. As a result, the operation shaft 34 rotates clockwise by a predetermined amount. In this case, in the angle adjusting mechanism 10, the operating shaft 34 engages the engaging protrusion 34b with the engaging groove 13c2 of the rotating cam 13, and as shown in FIG. Are rotated in the same direction by a predetermined amount. Thereby, the slide cam 1
2 slides rightward in the figure to engage the engaging projections 12b with the engaging projections 11c of the respective pawls 11, and retreat the respective pawls 11 inward in the radial direction, thereby causing the slide cam 12
Receives both legs 11b of each pawl 11 in the recess of the receiving cam portion 12c. As a result, the slide cam 12 releases the engagement of the pawls 11 with the internal teeth 15c of the movable housing 15 to release the locked state.

In this case, in the falling movable mechanism 20,
Since the engaging grooves 13c2 and 23c2 of the two rotating cams 13 and 23 are offset from each other, the operation shaft 34 is moved as shown in FIG.
As shown in (d), the engaging projection 34b does not engage with the engaging groove 23c2 of the rotating cam 23, and the rotating cam 23 does not rotate in the same direction. For this reason,
The engagement of each pawl 21 with the internal teeth 25c of the fixed housing 25 is maintained, and the locked state is maintained.

When the pole 11 of the angle adjusting mechanism 10 is in the unlocked state and the pole 21 of the falling movable mechanism 20 holds the locked state, only the movable housing 15 is different from the other components in the circumferential direction. Free state in direction. That is, in this state, the movable housing 15 is rotatable concentrically with respect to the fixed housing 25, and rotates the seat back in the front-rear direction with respect to the seat cushion to adjust the inclination angle in the front-rear direction. be able to.

After the movable housing 15 is rotated by a desired amount with respect to the fixed housing 25 to adjust the inclination angle of the seat back with respect to the seat cushion in the front-rear direction, the operation lever 34 is rotated in the direction of arrow 6. Is released, the rotating action on the rotating cam 13 disappears, and the rotating cam 13,
The operation shaft 34 and the operation lever 35 rotate and return. As a result, the slide cam 13 returns to the slide position and the pole 1
1 and the slide cam 13 loses the force acting on the pawl 11 in the backward direction, and at the same time,
The pole 11 is pressed by the pressing action of the convex portion of the receiving cam portion 12c.
Is moved forward to engage the pawl 11 with another part of the internal teeth 15c of the movable housing 15. As a result, the pole 1
1 is locked by the movable housing 15, and locks the movable housing 15 to the fixed housing 25 via other components.

On the other hand, in the reclining device R, when the seat back is desired to fall forward beyond the adjustment angle range by the angle adjustment mechanism 10, the operation lever 35 is turned in the direction of arrow 7 shown in FIG. I do. Thereby, the operation shaft 34 rotates a predetermined amount in the counterclockwise direction in the figure. In this case, in the falling movable mechanism 20, the operating shaft 34 has its engaging protrusion 34b engaged with the engaging groove 23c2 of the rotating cam 23.
To rotate the rotation cam 23 by a predetermined amount in the same direction as shown in FIG. As a result, the slide cam 22 slides rightward in the figure, and its engagement protrusion 22b
Are engaged with the engaging projections 21c of the pawls 21 and the pawls 21 are retracted inward in the radial direction.
Reference numeral 2 denotes a concave portion of the receiving cam portion 22c for receiving both leg portions 21b of each pawl 21. As a result, the slide cam 22
The engagement of the pawls 21 with the internal teeth 25c of the movable housing 25 is released to release the locked state.

In this case, in the angle adjusting mechanism 10,
Since the engaging grooves 13c2 and 23c2 of the two rotating cams 13 and 23 are offset from each other, the operation shaft 34 is moved to the position shown in FIG.
As shown in (b), the engaging projection 34b does not engage with the engaging groove 13c2 of the rotating cam 13, and the rotating cam 13 does not rotate in the same direction. For this reason,
The engagement of each pole 11 with the internal teeth 15c of the movable housing 15 is maintained, and the locked state is maintained.

When the pole 21 of the falling movable mechanism 20 is in the unlocked state and the pole 11 of the angle adjusting mechanism 10 holds the locked state, only the fixed housing 25 is different from the other components in the circumferential direction. Free state in direction. That is, in such a state, the movable housing 15 can rotate concentrically with respect to the fixed housing 25. In this case, since the internal teeth 25c of the fixed housing 25 are formed to be short enough to just engage the pawl 21, the pawl 21 is immediately turned by the rotation of the movable housing 15.
The vehicle rides on the free zone where the internal teeth 25c are not formed and slides.

Therefore, while the movable housing 15 is falling forward, the engagement of the pawl 21 with the internal teeth 25c is maintained in the released state, and the seat back falls forward to the set maximum. During this time, the pawl 11 of the angle adjusting mechanism 10 and the internal teeth 15c of the movable housing 15 are held in a meshing state immediately before the seat back down operation, so that they function as a memory mechanism.

Further, after the movable housing 15 is pivoted forward as far as possible with respect to the fixed housing 25 to cause the seat back to fall forward, in order to return the seat back to the pivoting position, the seat in the forward lying state is required. Lift the back and rotate it backward. In this case, the movable housing 15 rotates with respect to the fixed housing 25 while maintaining the meshing state between the pawl 11 of the angle adjusting mechanism 10 and the internal teeth 15c,
The rotation is stopped when the pawl 21 of the falling movable mechanism 20 meshes with the internal teeth 25c of the fixed housing 25, and the seat back is rotated and returned to the state immediately before the falling.

As described above, according to the reclining device R, the inclination angle of the seat back with respect to the seat cushion in the front-rear direction can be adjusted within a predetermined angle range by operating the angle adjusting mechanism 10. The function of the moving mechanism 20 allows the seat back to fall forward to the set maximum, and further has various functions and effects as described below.

That is, in the reclining device R, the operating lever 35 as the same operating means is used.
The angle adjusting mechanism 10 and the tilting movable mechanism 20 can be selectively operated, and the operation of the two mechanisms 10, 20 can be selected by selecting the rotation operation direction of the operation lever 35. For this reason, both mechanisms 10,
Selection at the time of selection of 20 is easy, and the selection operation can be performed accurately.

Further, in the reclining device R, a fixed housing 25 attached to the seat cushion side and a movable housing 15 fixed to the seat back side are provided.
Are formed in a space formed by being connected to each other in a superposed state, and each of the space sections partitioned by the holding plate 31 accommodates the angle adjustment mechanism 10 and the tilting movable mechanism 20 to make the apparatus compact. In addition, the weight of the device is reduced.

In the reclining device R, the angle adjusting mechanism 10 includes an arc-shaped internal tooth 15c provided on the annular peripheral wall of the circular recess 15b of the movable housing 15,
A pawl 11 meshable with the internal teeth 15c and held in a guide groove provided on the housing 15 side so as to be able to advance and retreat with respect to the internal teeth 15c; An operation member (sliding cam 12 and rotating cam 13) for releasing the pressing on the inner teeth 15c by releasing the pressing on the inner teeth 15c is provided. Similarly, the falling movable mechanism 20 is inserted into the arc-shaped internal teeth 25c provided on the annular peripheral wall portion of the circular recess 25b of the fixed housing 25 and the guide groove provided on the housing 25 side so as to mesh with the internal teeth 25c. A pawl 21 held so as to be able to advance and retreat with respect to the teeth 25c, and an operating member for pressing the pawl 21 toward the internal teeth 25c to engage with the internal teeth 25c and releasing the pressing on the pawl 21 during operation to release the engaged state with the internal teeth 25c. (Slide cam 22 and rotating cam 2
3).

Thus, the apparatus can be made compact and lightweight.
A guide groove for assembling the pole 11 and the slide cam 12 and a guide groove for assembling the pawl 21 and the slide cam 22 of the falling and moving mechanism 20 are provided in the accommodation space with the common holding plate 31 and the guide block 32. Since it is formed, the apparatus can be configured to be more compact and lightweight.

According to such a configuration, the reclining device R capable of accurately exhibiting the angle adjusting function and the falling movable function.
And the angle adjustment mechanism 10
Can automatically function as a so-called memory mechanism that can automatically return to the locked position immediately before the seat back falls down when the seat back returns from the lying state. There is no need to use parts.

Further, according to this configuration, the slide cam 1 for moving the pawls 11 and 22 forward and backward as the operating members constituting the angle adjusting mechanism 10 and the falling movable mechanism 20.
2, 13 and rotating cams 13, 23,
3 and 23 are fitted on the outer periphery of the operation shaft 34, and are selectively engaged and disengaged according to the rotational operation direction of the operation shaft 34. As a result, the angle adjusting mechanism 10 and the tilting movable mechanism 20 can be accurately operated, and the rotating cams 13 and 23 are included as components of these mechanisms.
There is a great advantage that the same components can be used, and the assemblability of each component can be improved, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a reclining device according to an example of the present invention.

2 is a partially omitted front view of the reclining device as viewed from the direction of arrow 2 in FIG. 1;

FIG. 3 is an exploded perspective view of an angle adjusting mechanism included in the reclining device.

FIG. 4 is an exploded perspective view of a falling movable mechanism that constitutes the reclining device.

FIG. 5 is a perspective view showing a relationship between each rotation cam and an operation shaft which constitute the angle adjustment mechanism and the tilting movable mechanism.

FIG. 6 is a partially omitted front view for explaining the operation of the angle adjusting mechanism.

FIG. 7 is a partially omitted front view for explaining the operation of the falling movable mechanism.

FIG. 8 is a schematic diagram for explaining a relationship between an operation shaft and each rotating cam when the angle adjusting mechanism is operated.

FIG. 9 is a schematic diagram for explaining a relationship between an operation shaft and each of the rotating cams when the tilting movable mechanism is operated.

[Explanation of symbols]

10: Angle adjustment mechanism, 11: Pole, 11a: External teeth, 1
1b: leg, 11c: engagement protrusion, 12: slide cam, 12a: plate body, 12b: engagement protrusion, 12
c: receiving cam portion, 12d: fitting hole, 12d1, 12d2 ...
Engaging groove portion, 13: rotating cam, 13a: cylindrical portion, 13b: engaging arm portion, 13c: inner hole, 13c1: circular hole portion, 13
c2: engagement groove, 14: connecting arm, 15: movable housing, 15a: housing body, 15b: circular recess,
15c: internal teeth, 20: movable movable mechanism, 21: pole, 2
1a: external teeth, 21b: legs, 21c: engaging projections, 22
... Slide cam, 22a ... Plate body, 22b ... Engagement projection, 22c ... Receiving cam part, 22d ... Fitting hole, 22d
1, 22d2: engaging groove portion, 23: rotating cam, 23a: cylindrical portion, 23b: engaging arm portion, 23c: inner hole, 23c1 ...
Circular hole, 23c2 ... engaging groove, 24 ... spiral spring, 24a ... inner end, 24b ... outer end 25 ... fixed housing, 25a ... housing body, 25b ... circular recess, 25c ... internal teeth, 31 ... holding Plate, 31a: Plate body, 31b: Circular hole, 31c: Fitting hole, 32: Guide block, 33: Set plate, 33a: Plate body, 33b: Cylindrical part, 34: Operating shaft, 34a: Cylindrical part, 34b ... Engagement projection, 35 ... Operation lever, 36 ... Spiral spring, R ... Reclining device, A1 ...
Upper arm, A2 ... Lower arm.

Claims (7)

[Claims] An operating mechanism having both a function of adjusting a tilt angle of a seat back with respect to a seat cushion in a front-rear direction within a predetermined angle range and a function of tilting the seat back forward beyond the adjustment angle range. And a reclining device including an operating means for operating the operating mechanism to selectively exert the two functions, wherein the operating means has different operating directions from each other, and selects an operating direction of the operating means. A reclining device characterized in that each function of the operating mechanism can be selected by the following. 2. The reclining device according to claim 1, wherein the actuating mechanism includes an angle adjusting mechanism having a function of adjusting a tilt angle of the seat back in the front-rear direction within a predetermined angle range, and The operating means is configured to rotate forward in a direction opposite to each other around an axis and has a function of tilting forward and out of the adjustment angle range. A reclining device comprising an adjusting mechanism and an operation shaft selectively connected to and operated by the falling movable mechanism. 3. The reclining device according to claim 1, wherein the operating mechanism is formed by connecting a fixed housing attached to a seat cushion side and a movable housing fixed to a seat back side in a superposed state. A reclining device, wherein the reclining device is disposed in a closed space. 4. A reclining device according to claim 3, wherein a partition defined by the fixed housing and the movable housing is provided in a space defined by the fixed housing and the movable housing. Have been
A reclining device, wherein the angle adjusting mechanism and the falling movable mechanism are respectively provided in each of the partition spaces partitioned by the partition. 5. The reclining device according to claim 4, wherein the angle adjusting mechanism meshes with arc-shaped internal teeth provided on an annular peripheral wall portion of a circular recess of one of the two housings. A pole which is held in a guide groove provided on the housing side so as to be able to advance and retreat with respect to the internal teeth,
An operating member for pressing the pawl against the internal teeth side to mesh with the internal teeth and releasing the pressing of the pawl during operation to release the meshing state with the internal teeth during operation, and wherein the falling movable mechanism is the other of the two housings An arc-shaped internal tooth provided on the annular peripheral wall portion of the circular recess of the housing, and a pawl which can be engaged with the internal tooth and is held in a guide groove provided on the housing side so as to advance and retreat with respect to the internal tooth. An operating member that presses the pawl against the internal teeth to mesh with the internal teeth and releases a pressing state on the pawl during operation to release a meshing state with the internal teeth, and each of the angle adjustment mechanism and the tilting movable mechanism A reclining device, wherein the operating member is configured to be selectively engaged and disengaged with respect to the same operating shaft as operating means in accordance with a rotating operation direction of the operating shaft. 6. The reclining device according to claim 5, wherein each of the operating members constituting the angle adjusting mechanism and the tilting movable mechanism is a cam for moving each of the pawls forward and backward, and is fitted on the outer periphery of the operating shaft. A reclining device, wherein the reclining device is configured to be selectively engaged with and disengaged from the operation shaft according to a rotational operation direction of the operation shaft. 7. The reclining device according to claim 6, wherein each of the constituent members constituting the angle adjusting mechanism and the tilting movable mechanism is the same except for the shape of an inner hole into which the operation shaft of the cam is fitted. Reclining device characterized by the use of parts.