JPH0459440A - Device for finely adjusting inclination of upper reclining backrest part in reclining backrest seat for vehicle - Google Patents

Abstract

PURPOSE:To prevent troubles in a backrest seat having a toumel mechanism of an upper backrest part interlocked with a reversible toumel mechanism of a lower backrest part by providing a clutch mechanism for disconnecting the interlocking of the upper backrest part with the lower reversible toumel mechanism in the toumel mechanism of the upper backrest part. CONSTITUTION:A reclining mechanism A formed of a reversible toumel mechanism 19 is disposed between a lower backrest part 4 and a seat 2. An upper toumel mechanism 42 is disposed between an upper backrest part 5 and the lower backrest part 4 so that both mechanisms 19, 42 are interlocked with each other through a driven gear 57, rotary transmission member 59 and intermediate drive gear 34. A fine adjustment device 60 is mounted on the outer end of an upper rotary shaft 49 of the upper toumel mechanism 42 and a clutch claw 61 an annular clutch claw 62 are interposed between the outer end and the driven gear 57. The interlocking with the rotary transmission member 58 is cut off by a fine adjustment handle 63 so that the inclination of the upper back rest part 5 can be finely adjusted by hand.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for adjusting the inclination angle of an upper backrest portion of a backrest seat for a vehicle.

(Prior art) According to the conventionally known Japanese Patent Application Laid-Open No. 60-193729, the back seat is composed of a seat attached to the vehicle body side and a backrest seat attached to the rear of the seat so as to be rotatable back and forth. The canopy seat is divided into a lower backrest portion and an upper backrest portion, the lower backrest portion is pivotally fixed to the seat sheet so as to be rotatable back and forth, and the upper backrest portion is connected to the lower backrest portion. A vehicle backrest seat is configured such that the lower backrest portion is pivotally fixed to the backrest portion so as to be rotatable back and forth, and when the lower backrest portion is rotated back and forth, the upper backrest portion is rotated back and forth in conjunction with this, A parallel link mechanism connects the bracket a of the seat and the arm C of the upper backrest frame b by a connecting rod e parallel to the lower backrest frame d, and the connecting rod e.
A handle f that rotates a cam member provided on the lower shaft support of
A device for finely adjusting the inclination angle of the upper backrest portion of a vehicle backrest seat provided with the above is described (see Fig. 14).
.

(Problem to be Solved by the Invention) The known device for finely adjusting the inclination angle of the upper backrest portion is as follows:
Since the bladder 7) of the seat seat and the arm C of the paired upper backrest frame b are connected in a parallel link mechanism by the lower backrest frame d, which also serves as a rod, and the connecting rod e, When the handle f of the lower pivot of the connecting rod e is rotated, the connecting rod e moves up and down and the arm C rotates left and right in the figure, so the upper backrest frame b can be finely adjusted to tilt forward or backward. can.

However, in the above configuration, there is no need to worry about the tensile strength of the connecting rod e, but there is no way to ensure the compressive strength other than increasing the diameter of the connecting rod e, but increasing the diameter of the rod e increases the weight. This increases the cost and makes it difficult.

Therefore, other structures have been carefully devised, and fine adjustments can be made using a simple method.

(Objective of the Invention) Therefore, the first object of the present invention is to obtain an apparatus for adjusting the inclination angle of an upper backrest that is less likely to malfunction by utilizing the known Taumel mechanism.

A second object of the present invention is to enable fine adjustment in a device for adjusting the tilt angle of the seat back using the known Taumel mechanism.

(Means for Solving the Problems) Therefore, the present invention comprises a seat 2 attached to the vehicle body side and a back seat 3 attached to the rear of the seat 2 so as to be rotatable back and forth. 3 is divided into a lower backrest part 4 and an upper backrest part 5, the lower backrest part 4 is pivoted to the seat 2 so as to be rotatable back and forth, and the upper backrest part 5 is The shaft is fixed to the lower backrest portion 4 so as to be freely rotatable back and forth, and the lower outer circumferential teeth 21 are located on the lower backrest portion 4 side at the shaft locking portion between the lower backrest portion 4 and the seat sheet 2. A lower reversing Taumel mechanism 19 is provided in which the seat seat 2 side has a lower inner circumferential tooth n, and the upper backrest part 5 side has an upper inner circumferential tooth n at the shaft stop between the upper backrest part 5 and the lower backrest part 4. An upper Taumel mechanism 42 is provided which is a toothed portion and the upper outer circumferential teeth are on the lower backrest portion 4 side, and the lower outer circumferential teeth 21 of the lower reversing Taumel mechanism 19 and the upper inner circumferential teeth 6 of the upper Taumel mechanism C are provided.
A rotary transmission part foundation is provided between the parts, so that when the lower backrest part 4 is rotated back and forth, the upper backrest part 5 is rotated back and forth in the opposite direction in conjunction with this.

When the outer end of the rotating shaft 49 that rotates the upper internal teeth 6 on the upper backrest 5 side is pulled outward, a clutch mechanism that engages and disengages the rotational transmission from the rotational transmission unit base is disengaged. The rotating shaft object can be directly rotated by manual operation, so that the upper inner circumferential tooth 46 can be manually rotated to rotate the upper backrest part 5.
This is a device for finely adjusting the inclination angle of the upper backrest portion of a vehicle backrest seat equipped with a manual handlebar that can be manually adjusted.

(Embodiment) To explain an embodiment of the present invention with the drawings, l is a vehicle seat, 2 is a seat of the vehicle seat l, and 3 is a backrest that is attached to the rear of the seat 2 so as to be rotatable back and forth. It is a sheet.

The backrest sheet 3 includes a lower backrest portion 4 that supports the lower back and waist, and an L backrest portion 5 that supports the upper back.
It is formed in two parts.

In FIG. 2, 7 is a lower skeleton frame of the lower backrest portion 4, which includes an upper horizontal frame 8, a lower horizontal frame 9, and the upper horizontal frame 8.
and a lower vertical frame 10.10 which connects and fixes both ends of the lower horizontal frame 9, forming a rectangular frame shape.

Reference numeral 11 denotes an upper skeleton frame of the upper backrest portion 5, which, like the lower skeleton frame 7, includes an upper horizontal frame l and a lower horizontal frame 13.
The upper horizontal frame and the upper vertical frame 14, 14 which connect and fix both ends of the lower horizontal frame 13 form a rectangular frame shape.

A vertically long mounting plate 15.15 is fixed to the lower vertical frame 10.10, and the upper part of each of the vertically long lower movable brackets 16.16 is fixed to the lower end of each of the mounting plates 15.15 with bolts or the like. do.

The lower portion of each of the lower movable brackets 16.16 is connected to a lower fixed bracket 18 fixed to the rear side of the seat 2.
．． 18 so as to be rotatable in the front-back direction.

A lower reversing Taumel mechanism 19, 19 constituting a reclining mechanism A for adjusting the inclination angle of the lower backrest portion 4 is provided between the left and right lower movable brackets 16 and lower fixed brackets 18, respectively.

The lower portion of the lower movable bracket 16 is bent to have a rectangular cross section and has a convex portion having a circular shape when viewed from the side (Figs. 3 and 4), and the outer peripheral surface of the convex portion is provided with a convex portion. Lower peripheral tooth 2
form 1.

The lower fixing bracket eye 8 is formed with a recess η having a round cross-sectional shape projecting inwardly with a larger diameter than the convex portion and having a circular shape in side view. Form periodontal teeth n.

The convex portion is fitted into the concave portion η such that the lower outer tooth 21 partially meshes with the lower inner tooth n (FIG. 3).

A fitting hole 24 is formed at the center of the recess η (Fig. 4),
A fitting hole is formed in the center of the convex portion, and the fitting hole 2
4 and said fitting hole B to insert and fit the lower rotating shaft load in the left and right direction.

The lower rotating shaft 9 has a small diameter shaft part n and a small diameter shaft part 3 on the left and right sides with the large diameter cam shaft part in between.The large diameter cam shaft part has a small diameter shaft part n, 29. The small-diameter shaft part n is fitted into the fitting hole 24, and the large-diameter cam shaft part n is fitted into the fitting hole 3.

The large diameter camshaft portion rotates eccentrically with respect to the small diameter shaft portion n, 29, thereby exerting a cam action that moves the lower outer circumferential tooth 21 while meshing with the lower inner circumference both concave portions (FIG. 8).

The insertion hole 31 of the reinforcing plate I is inserted into the small diameter shaft part n, and the reinforcing plate (9) is provided outside the lower movable bracket N6, and the lower fixed bladder 2 and the reinforcing plate (9) are connected to each other. The movable bracket 16 is held between the left and right sides. Reference numeral 32 denotes a holding pin that smoothes the rotation of the lower movable bracket eye 6, and is fixed to the upper part of the lower movable bracket 16 at a predetermined interval, and the lower fixing bracket 18 is held by the pin support and the lower movable bracket 16. Sandwich.

As shown in FIG. 3, the outer end of the small diameter shaft part n is made to protrude outward from the reinforcing plate □□□, and the intermediate gear straw is fixed to the small diameter shaft part 29. The intermediate gear rotates on the same axis as the small diameter shaft part 4.

Further, an intermediate drive gear 34 is fixed to the outer end of the small diameter shaft portion 6. The intermediate drive gear is mounted eccentrically with respect to the small diameter shaft portion 6 so that it rotates on the same axis as the large diameter cam shaft portion.

An input gear that meshes with the intermediate gear 33 is mounted on the lower fixed bracket 18 by a shaft, and a reclining dial 37 is fixed to the shaft I.

Both ends of the connecting shaft in the left and right direction are fixed to each of the small diameter shaft portions n of the left and right lower reversing Taumel mechanisms 19, and the lower reversing Taumel mechanisms 19 on both the left and right sides are operated simultaneously by the connecting shaft blades.

As described above, the lower reversing Taumel mechanism 19 includes the convex portion of the lower movable bracket 16, the lower outer peripheral tooth 21 on the outer peripheral surface of the convex portion, the recess η of the lower fixed bracket 18, and the recess. A lower inner peripheral tooth n formed on the inner peripheral surface of η,
The lower backrest portion 4 is composed of the lower rotating shaft load.
When the reclining dial mushroom is rotated clockwise in FIG. 4 so as to tilt backward, the rotation is transmitted to the lower rotating shaft side by the input gear and intermediate gear blades, and the lower rotating shaft side itself rotates counterclockwise. As shown in FIG. 8, the lower outer tooth 21 itself rotates counterclockwise in the same way as the lower rotating shaft 3, but due to this rotation, the lower outer tooth 21 moves in the clockwise direction along the lower inner circumference biconcave. Lower reversal Taumel mechanism 19
By moving the lower outer peripheral teeth 21 in the counterclockwise direction, the lower backrest portion 4 is rotated in the rotational direction of the reclining dial.

At the upper end of each of the mounting plates 15.15, there is provided a vertically elongated upper fixing bracket (40), a lower part of each of the mallets (FIG. 3), and an upper fixing bracket (40.40).
41. are fixed to the upper vertical frames 14 and 14 of the upper skeleton frame 11, respectively.
41 are pivoted so as to be freely rotatable in the front and rear directions.

Between the left and right upper fixed brackets 40 and the upper movable brackets 41, there is an upper Taumel mechanism C142 constituting the upper backrest tilting mechanism B that tilts the upper backrest 5 forward with respect to the lower backrest 4. (Figure 2).

The Dobe backrest tilting mechanism B is the lower reversing Taumel mechanism 19.
When the entire backrest seat 3 is rotated backwards, the lower backrest portion 4 tilts backward, but the upper backrest portion 5 is a mechanism that causes the upper backrest portion 5 to tilt forward.

As shown in FIG. 5, a convex portion 43 having a rectangular cross section is formed on the soil portion of the upper fixing bracket 40, and an upper outer periphery is formed on the outer peripheral surface of the convex portion 43.

The upper movable bracket 41 is formed with a concave portion 6 having a rectangular cross section that is recessed inward, and an upper inner circumferential gear which partially meshes with the upper outer circumferential gear is formed on the inner circumferential surface of the concave portion 45.

A fitting hole 47 is formed in the center of the convex part, and a fitting hole 47 is formed in the center of the convex part.
A fitting hole 47 is formed in the center of the shaft 5, and a large diameter shaft portion 51 of the upper rotating shaft is fitted into the fitting hole 47.

The upper rotating shaft 49 has a small-diameter camshaft 50 formed at its inner end, a grooved shaft 52 at its outer end, and the small-diameter camshaft (part) is formed between the large-diameter shaft 51 and the groove. It is formed eccentrically with respect to the shaft portion 52.

The small diameter cam shaft part (capital) is connected to the upper movable bracket 41.
The end of the connecting shaft 8 is fixed to the inner end of the small-diameter camshaft part (part), and the upper Taumel mechanism C on both the left and right sides is actuated by the connecting shaft 8 at the same time.

The insertion hole I of the upper reinforcing plate 8 is inserted into the large diameter shaft portion 51, and the upper reinforcing plate is provided outside the upper fixed bracket 40, and the upper fixed bracket is fixed by the upper reinforcing plate and the upper movable bracket 41. ) 40 from the left and right sides. 56
is a presser pin that presses the lower end of the upper movable bracket 41, and is fixed at a predetermined interval to the lower part of the upper fixed bladder 40, and the upper movable bracket 4 is ! sandwich.

As described above, the upper Taumel mechanism C includes the convex portion 6 of the upper fixed bracket 40, the upper peripheral teeth U formed on the outer peripheral surface of the convex portion C, the recess 6 of the upper movable bracket 41, and the recess. The upper movable bracket h41 is constituted by an upper inner peripheral tooth portion formed on the inner peripheral surface of the bracket h41 and an upper rotating shaft 0, and the upper movable bracket h41 is rotated in the same direction as the rotation direction between the upper rotating shafts.

The large diameter shaft portion 51 of the upper rotating shaft object is
Pass through the passive gear 57 coaxially so that it can only rotate freely,
A rotary transmission unit consisting of a timing belt or the like is connected between the passive gear 57 and the intermediate drive gear 34, and the upper Taumel mechanism C is connected to the lower reversing Taumel mechanism 1.
Link with 9.

Therefore, a fine adjustment device (
9).

A claw 61 is formed on the outer surface of the driven gear 57, either integrally or separately.

The grooved shaft portion of the upper rotating shaft 49 is made to protrude outward from the driven gear, and an annular clutch pawl shaft that engages and disengages from the clutch pawl 61 is fitted into the grooved shaft portion 52 . The annular clutch pawl portion is formed integrally with or separately from the fine adjustment handle wing, and the fine adjustment handle portion is fitted into the groove shaft portion so as to be slidable only in the axial direction of the groove shaft portion.

A recess is formed in the center of the fine adjustment handle cover,
A bolt 65 whose tip is fixed to the groove shaft is fitted into the recess, and an annular clutch pawl P of the fine adjustment handle is urged to press against the clutch pawl 61 on the outer periphery of the bolt. Wind the spring band. 6'7 is a lid.

When the fine adjustment device pulls out the concave portion against the elasticity of the spring mark and rotates in this state, the upper rotating shaft 49 rotates and the upper Taumel mechanism C is activated.

In addition, in the Taumel mechanism, the number of teeth and the number of teeth are different in the relationship between the lower outer peripheral teeth 21, the upper outer peripheral teeth, the lower inner peripheral teeth n, and the upper inner peripheral teeth 46, or the intermediate By changing the gear ratio of the driving gear and the driven gear 57, it is possible to change the ratio of the forward tilting of the L section backrest 5. For example, when the lower backrest 4 is reclined rearward, It is also possible to move the upper backrest part 5 in parallel in that state, or to make it fall forward suddenly relative to the rearward reclining state of the lower backrest part 4.

(effect) Next, we will discuss the effect.

The present invention has the above-mentioned structure, in which the backrest seat 3 is divided vertically into a lower backrest part 4 and an upper backrest part 5, and the lower movable bracket 16 of the lower frame 7 of the lower backrest part 4 is The lower movable bracket 16 is pivotally fixed to the lower fixing bracket 18 of the seat 2 so as to be rotatable back and forth, and the lower movable bracket 16 is formed with lower outer circumferential teeth 21, and the lower outer circumferential teeth 21 are attached to both lower inner circumferences of the lower fixing bracket 18. Since it partially engages with the concave portion, when a person is seated on the vehicle seat 1 and rotates the reclining dial r of the reclining mechanism A clockwise in the direction shown in FIG. 4 in which the lower backrest portion 4 is tilted backward, an input The rotation is transmitted by the gear and the intermediate gear, and the lower part rotates #I
The kZ6 itself rotates counterclockwise, and the lower outer tooth 21 itself rotates counterclockwise in the same way as the lower rotating shaft side, as shown in FIG. The lower reversing Taumel mechanism 19 moves in the clockwise direction.
By moving the lower outer circumferential teeth 21 in the counterclockwise direction, the lower backrest portion 4 is tilted rearward in the rotational direction of the reclining dial r.

Thus, the upper backrest 5's upper skeleton frame 11 is pivotally fixed to the upper part of the lower skeletal frame 7 of the lower backrest 4 via the upper backrest inclination mechanism B so as to be rotatable back and forth. The tilting mechanism B forms an upper outer circumference on the upper fixed bracket 40 of the lower skeletal frame 7, and the upper skeletal frame 11
Since the upper movable bladder 2 and 41 are formed with upper inner circumferential teeth, the rotation of the lower rotating shaft 3 causes the intermediate gear blade to rotate, and the rotation of the intermediate gear blade is caused by the rotational transmission member portion of the passive gear. 57, and the passive gear 57 is transmitted to the clutch pawl 6!
Since the annular clutch pawl of the fine adjustment handle B is engaged with the clutch pawl 61 by the elasticity of the spring mark, the rotation of the clutch pawl 61 rotates the fine adjustment handle B. The fine adjustment handle area rotates the upper rotating shaft 49 via the grooved shaft portion 52.

When the northern rotating shaft l of the upper Taumel mechanism 42 of the upper backrest tilting mechanism B is rotated, the upper rotating shaft object rotates with its large diameter shaft portion 5.
! The small diameter camshaft (capital) rotates around the upper rotation axis.
rotates eccentrically and rotates while meshing the upper inner circumferential tooth portion with the L portion outer circumferential tooth deviation.

As shown in FIG. 9, the upper inner peripheral teeth rotate counterclockwise in the same way as the lower rotating shaft side of the lower reversing mechanism 19, and the upper movable bracket (41) is tilted forward with respect to the upper fixed bracket (40). The upper movable bracket 41 causes the upper vertical frame 14 of the upper skeleton frame 11 to fall forward, and causes the upper backrest portion 5 to fall forward via the upper skeleton frame 11.

Therefore, when the lower backrest 4 tilts backward, the upper backrest 5 falls forward, and the upper back of the seated person is supported by the upper backrest 5, maintaining a comfortable posture.

Therefore, a fine adjustment device 1 is provided at the outer end of the upper rotating shaft l.
60 is provided, and the total adjustment bag N60 is connected to the passive gear 57.
A clutch pawl 61 is formed on the outer surface of the front soil rotating shaft 49.
An annular clutch pawl that engages and disengages from the clutch pawl 61 is formed on the fine adjustment handle that is slidably fitted into the groove shaft portion 52 of the fine adjustment handle. When you pull it out against the elasticity of the spring band, W! Since the annular clutch pawl of the adjustment handle is disengaged from the clutch pawl 61, the fine adjustment handle area rotates independently of the passive gear 57, and the rotation of the fine adjustment handle area causes the groove shaft portion 52 to rotate. The upper rotating shaft 6 is rotated through the upper rotating shaft 6, and the upper Taumel mechanism C is operated.

Therefore, the fine adjustment handle operates the upper Taumel mechanism C as described above, rotates the upper backrest 5 back and forth to a desired angle, and finely adjusts the inclination angle of the 7-part backrest 5. .

(Effect) According to the conventionally known Japanese Patent Application Laid-open No. 1988-193729, a lower backrest frame that also serves as a rod is provided between the bracket a of the seat and the arm C of the paired upper backrest frame b. d and connecting rod e to form a parallel link mechanism, so when the handle f of the lower shaft support of the connecting rod e is rotated, the connecting rod e moves up and down and the arm C rotates left and right in the figure. The upper backrest frame b can be finely adjusted to tilt forward or backward, but with the above configuration, there is no need to worry about the tensile strength of the connecting rod e, but the compressive strength is better than increasing the diameter of the connecting rod e. There is no other way to ensure strength, but increasing the diameter of the rod e increases the weight and cost, which is difficult.

However, the present invention includes a seat 2 attached to the vehicle body side,
It consists of a backrest sheet 3 attached to the rear part of the seat 2 so as to be rotatable back and forth, and the backrest sheet 3 is divided into a lower backrest part 4 and an upper backrest part 5, and the lower backrest part 4 is pivotally fixed to the seat 2 so as to be rotatable back and forth, and the upper backrest 5 is pivotally fixed to the lower backrest 4 so as to be rotatable back and forth. A lower reversing Taumel mechanism 19 is provided at the shaft stopping part with the seat sheet 2, and the lower backrest part 4 side is the lower outer circumferential teeth 21 and the seat sheet 2 side is the lower inner circumferential teeth n, and the upper backrest part 5 and the lower backrest portion 4
An upper Taumel mechanism C is provided at the shaft stop portion of the lower backrest portion 5 side, and an upper inner circumferential tooth portion is provided on the upper backrest portion 5 side, and an upper outer circumferential tooth portion U is provided on the lower backrest portion 4 side. A rotation transmission member is provided between the outer tooth 21 and the upper inner circumference of the upper Taumel mechanism C, so that when the lower backrest 4 is rotated back and forth, the upper backrest 5 rotates in conjunction with this. In a device configured to rotate back and forth in the opposite direction, a rotating shaft 4 that rotates the upper inner circumferential teeth 6 on the upper backrest portion 5 side.
At the outer end of 9, when pulled outward, a clutch mechanism that engages and disengages the rotational transmission from the rotational transmission member can be disengaged, allowing direct rotation between the rotational shafts by manual operation. This is a device for finely adjusting the inclination angle of the upper backrest portion of a vehicle backrest seat, which is equipped with a manual handle that allows manual fine adjustment of the upper backrest portion 5 by manually rotating the peripheral teeth 46. B. When the manual handle attached to the outer end of the rotating shaft 49 that rotates the upper inner teeth 6 on the upper backrest 5 side is pulled outward,
A clutch mechanism that engages and disengages rotational transmission from the rotational transmission member can be disengaged.

mouth, then rotate the 1 manual handle area and the rotation axis 4
9 can be manually rotated, so that the upper inner tooth 6 can be manually rotated to manually finely adjust the upper backrest 5.

C. Since it is the device described in A. above, it is simpler and lighter in weight than known examples, and there are fewer failures.

This effect is achieved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the vehicle seat, Fig. 2 is a perspective view of the frame of the vehicle seat, Fig. 3 is a longitudinal sectional front view of main parts, Fig. 4 is an assembled perspective view of the lower reversing Taumel mechanism, Fig. 5 is an assembled perspective view of the upper Taumel mechanism, FIG. 6 is a side view of the lower reversing Taumel mechanism, FIG. 7 is a side view of the upper Taumel mechanism, and FIG. 8 is a side view of the upper Taumel mechanism.
Figures 9 and 9 are explanatory diagrams of the action of the Taumel mechanism, Figures 10 to 13 are diagrams of its working state, and Figure 14 is a diagram of a known example. Explanation of symbols 1...vehicle seat, 2...seat sheet, 3...
Backrest seat, 4... Lower backrest part, 5... Upper backrest part, 6... Reclining mechanism, 7... Lower skeleton frame, 8... Upper horizontal frame, 9... Lower part. Horizontal frame, 10...
・Lower vertical frame, 11... Upper skeleton frame,... Upper horizontal frame, 13... Lower horizontal frame, 14... Upper vertical frame,!
5... Mounting plate, 16... Lower moving bracket, 18
...Lower fixing bracket, 19...Lower reversal Taumel mechanism, redundancy...convex portion, 21...outer tooth, η...recess, n...inner tooth, 24, O... Fitting hole, 5...
Lower rotating shaft! ...small diameter shaft part, n...large diameter cam shaft part, rooster...small diameter shaft part, (9)...reinforcement plate, 31...
Insertion hole, V...holding pin, ah...intermediate gear,
... Intermediate drive gear, 5... Input gear, I... Axis, r
...Reclining dial, ah...connection shaft, mallet...
...Upper fixed bracket, 41...Upper movable bracket, Q...Upper taumel mechanism, 43...Convex portion, storage...
... Outer tooth, 6... Concavity, 46... Inner tooth, 47,
49... Fitting hole, 49... Upper rotating shaft, Connection... Small diameter cam shaft part, 51... Large diameter shaft part, 52... Groove shaft part, 5
3... Connection shaft, 54... Upper reinforcing plate, 5... Insertion hole, jumper... Holder pin, 57... Passive gear, jumper...
・Rotation transmission member, mark...fine adjustment device, 61...clutch pawl, di...annular clutch pawl, field...handle for fine adjustment, hole...recess, 65...bolt, μs ...
Spring, "...lid. Procedural amendment (spontaneous) Display of case 1990 2, Name of invention Patent application No. 170854 Device for finely adjusting the inclination angle of the upper backrest part of a vehicle backrest seat Address Name 9th floor, Shinjuku Kokusai Hilding New Building, 6-6-3 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160, Tokyo Seat Co., Ltd. Representative Yu Yanagibashi, 3-7-2 Sakaemachi, Asaka City, Saitama Prefecture

Claims (1)

[Claims] It consists of a seat 2 attached to the vehicle body side, and a back seat 3 attached to the rear of the seat 2 so as to be rotatable back and forth,
The backrest seat 3 is divided into a lower backrest part 4 and an upper backrest part 5, the lower backrest part 4 is pivoted to the seat sheet 2 so as to be rotatable back and forth, and the upper backrest part 4 is rotatably fixed to the seat sheet 2. The portion 5 is pivoted to the lower backrest portion 4 so as to be rotatable back and forth, and the lower backrest portion 4 side has a lower outer circumferential tooth at the pivoting portion between the lower backrest portion 4 and the seat sheet 2. 21, and a lower reversing Taumel mechanism 19 is provided on the seat 2 side having lower inner circumferential teeth 23,
A shaft stop between the upper backrest portion 5 and the lower backrest portion 4 includes:
An upper taumel mechanism 42 in which the upper backrest portion 5 side is the upper inner circumferential teeth 46 and the lower backrest portion 4 side is the upper outer circumferential teeth 44.
are provided, and the lower outer circumferential tooth 2 of the lower reversal Taumel mechanism 19 is provided.
1 and the upper inner tooth 46 of the upper Taumel mechanism 42, a rotation transmission member 58 is provided so that when the lower backrest portion 4 is rotated back and forth, the upper backrest portion 5 is rotated in the opposite direction. A rotating shaft 49 that rotates the upper inner circumferential teeth 46 on the upper backrest portion 5 side;
At the outer end of the upper inner periphery, a clutch mechanism that engages and disengages rotational transmission from the rotational transmission member 58 when pulled outward is disengaged, allowing the rotational shaft 49 to be directly rotated manually. By manually rotating the teeth 46, the upper backrest portion 5
A device for finely adjusting the inclination angle of an upper backrest portion of a vehicle backrest seat, which is equipped with a manual handle 63 that can manually finely adjust the angle of the backrest.