JPH03176004A - Seat-reclining device for vehicle - Google Patents

Abstract

PURPOSE:To simplify the mechanism of the title device and to strengthen the structure thereof, by a method wherein on a fixed main shaft, a sector plate, a lock-releasing member, a lock plate and an operating lever are mounted so that a cam member on the lock-releasing member is engaged with an engagement part on the lock plate and projection for positioning on the lock plate is brought into contact with the inside of the operating lever. CONSTITUTION:When a lock plate 23 is shifted to the outside, with an operating lever 40, a lock gear part 27 thereon is detached from a sector gear part 14 and both a rotary bracket 4 and a sector plate 12 become in an unlocked state, and an inclined angle of a back-rest seat 2 can be voluntarily adjusted. When released from the hand after the adjustment of the inclined angle of the back-rest seat 2, the operating lever 40 is turned to the lock side by the elastic force of a spring 49, and a cam member 19 is also turned together with the turning of the operating lever 40 and faces an engagement part 30. On the other hand, since an inclined plane 32 for guiding a positioning projection 31 is pushed by an inside wall 47 of an engagement part 46, the lock plate 23 is shifted to the inside by a cam action of the positioning projection 31. In this way, the lock gear part 27 becomes in a locked state of being engaged with the sector gear part 14, and the back-rest seat 2 is held at the reclined angle adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reclining device for a vehicle seat.

(Prior Art) The conventionally known Japanese Utility Model Application No. 60-193145 discloses a fixed main shaft fixed to a fixed bracket fixed to the seat side, and a backrest rotatably fixed to the fixed main shaft. a rotating bracket fixed to the seat side; a sector plate fixed to one side of the rotating bracket and having an insertion hole through which the fixed main shaft passes;
A fan-shaped sector gear portion centered on the insertion hole formed in the sector plate, a lock plate pivoted to a shaft other than the fixed main shaft, and a claw-shaped lock pawl formed at the tip of the lock plate. and the lock plate,
A reclining device for a vehicle seat is disclosed that includes an operating lever that is fixed to the shaft of the lock plate that rotates the lock plate.

(Problems to be Solved by the Invention) In the above-mentioned known vehicle seat reclining device, the device that is pivoted to the fixed bracket fixed to the seat side is fixed to the rotating bracket fixed to the backrest seat side and the rotating bracket fixed to the back seat side. The sector plate is fixed to one side of the moving bracket, and the lock plate and the operating lever for rotating the lock plate are fixed to another shaft. As a result, the overall structure had to become larger. Also, because the number of meshing teeth between the sector plate and lock plate was small, it was unable to withstand large loads.

There was a problem with missing teeth.

(Object of the Invention) The present invention provides a uniaxial structure for the lock/unlock mechanism, which simplifies the mechanism and also strengthens the structure.

(Means for Solving the Problems) Therefore, the present invention provides a fixed main shaft 5 fixed to a fixed bracket 3 fixed to the seat l side, and a backrest rotatably fixed to the fixed main shaft 5. A rotating bracket 4 fixed to the seat 2 side, and a sector plate L2 fixed to one side of the rotating bracket 4 and having an insertion hole 13 in the center thereof through which the fixed main shaft 5 passes.
And a radial sector gear portion centered on the insertion hole 13 formed in the sector plate! 4, a lock plate n that can only slide freely with respect to the fixed main shaft 5, a radial lock gear portion n formed on the side of the lock plate 23 facing the sector plate member, #
A lock release member 16 located between the lock plate 23 and the sector brake 12 and rotatably inserted into the fixed main shaft 5; and an operating lever mounted on the fixed main shaft 5 for rotating the lock release member 16. 4
0 and a cam member 19 for separating the lock plate 23 provided on the lock release member 16.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a seat of a vehicle seat, 2 is a backrest seat that is attached to the rear of the seat l so that its inclination angle can be adjusted; Reference numeral 3 designates a fixed bracket attached to the seat l, 4 a rotating bracket attached to the back seat 2, and 5 a fixed main shaft in the left-right direction that pivots the rotating bracket 4 to the fixed bracket 3. .

As shown in FIG. 2, an engagement groove 6 in the shape of a split groove is formed at the inner end of the fixed main shaft 5.
is engaged with one end of the center portion of the spiral spring 7. The other end of the spiral spring 7 is engaged with the back seat 2 and biased to fall forward.

A flange 8 is formed at the inner part of the fixed main shaft 5 from the middle thereof. An oval-shaped different diameter portion 9 is formed on the outer periphery of the fixed main shaft 5 on the outer surface side of the 7 langes 8.

The fixing bracket 3 has an oval-shaped fitting hole! 0 and the fitting hole! Different diameter portion 9 of main shaft 5 fixed at 0
mate. The fixed main shaft 5 is non-rotatably attached to the fixed bracket 3.

The day shift bracket 4 is inserted into the fixed main shaft 5 through an insertion hole 11 formed at the center of its lower part, and is attached to the fixed main shaft 5 so as to be rotatable back and forth.

There are 5 sector plates on the outer surface of the rotating bracket 4) 1
2 is fixed with rivets or the like. 13 is an insertion hole formed in the center of the sector plate 12.

A fitting recess 15 having a circular shape in side view is formed around the insertion hole 13 on the outer surface of the sector plate 12.
The insertion hole is located around the ! A radial sector gear portion 14 is formed in an annular shape similar to 3.

On the outside of the sector plate 12 of the fixed main shaft 5, a disc-shaped lock release member 16 that fits into the fitting portion ff115 is attached so that it can only rotate freely. Reference numeral 17 denotes an insertion hole formed in the center of the lock release member 16, and on diagonal lines on both front and rear sides of the insertion hole 17, through holes 18 and 18 are formed.
form.

A cam member 19.19 is provided on the outer surface of the unlocking member 16 in the vicinity of the through hole 18.18. Cam member 19.1
9 are arranged diagonally to each other.

The cam member 19 is formed in an arc shape centered on the insertion hole 17 when viewed from the side, and the side surface of the cam member 19 is formed by rotating the unlocking member 16 in the unlocking direction as shown in FIG. At this time, a retaining slope 20 having a slope that is low on the forward side in the rotational direction and gradually increasing in slope as it reaches the backward side in the rotational direction, and a flat flat surface 2 continuing to the terminal end on the engagement slope side.
1 and.

The terminal end of the flat surface 21 is formed by an upright surface substantially perpendicular to the outer surface of the unlocking member 16 .

A lock plate 3 is provided outside the lock release member 16 of the fixed main shaft 5 so as to be non-rotatable with respect to the fixed main shaft 5 and movable only in the axial direction of the shaft 5 (FIG. 2).

The inner surface of the lock plate 23 (the lock release member 16
A lock gear part n is formed on the side), and all gears of the lock gear part n are configured to be connected to and detached from the sector gear part 14.

24 is an insertion hole formed in the center of lock plate i; 25
is a key groove formed in the radial direction on the inner circumferential surface of the insertion hole 24, and the key #I 25 is engaged with a key protrusion π formed on the fixed main shaft 5, thereby making it impossible to make one rotation.

A fitting recess corresponding to the fitting recess 15 of the sector plate 12;
□□□, (to) the cam member 1 of the lock release member 16
9.19 is a fitting part to be fitted.

3L31 is a positioning projection formed on the outer surface of the lock plate 23, which comes into contact with the inner surface of the operating lever ω, which will be described later, to move the lock plate n toward the lock release member 16 side.

The positioning protrusion 31 is formed between the fitting part blade and the elongated hole 29, and has the same shape as the cam member 19, and is formed by a guide slope g, a flat surface, and a substantially right-angled upright surface 34. (Figure 3).

Therefore, an operating lever ω is provided on the fixed main shaft 5 outside the lock plate n. When the operating lever is turned off, when pulled upward, the lock plate 23 is moved outward to release the locked state, and when the lever returns to its original position,
The lock plate 23 is moved toward the lock release member 16.

That is, the lock plate 23 is inserted into the fixed main shaft 5 so that the cam member 19.19 of the lock release member 16 is fitted with the fitting part blade of the lock plate η, and the lock gear part n and the sector gear part 14 are connected. Meshing 1 Next, move the operating lever 40 so that the inner surface of the operating lever 40 comes into contact with the flat surfaces O and 33 of the positioning protrusions 31 and 31 of the lock plate 4.
(Fig. 5) into the fixed main shaft 5), and in this state, connect the lock release member 16 and the operating lever to the pin U.

44 so that they can rotate together.

Then, when the lock release member 16 is rotated in the lock release direction by the operating lever 40 (FIG. 8), the cam member 19
The engaging inclined surface side of is in contact with the inner wall 6 of the fitting part □□□, and is lowered by the cam action of the engaging inclined surface B.

The cup plate 23 moves outward.
(Fig. 13), the lock gear part n is separated from the sector gear part 14 (Fig. 14), and at this time, the low 2 cup hi
The positioning protrusions 31 and 31 fit into fitting portions 柘 and 柤 formed on the operating lever 40, and the outer surface of the lock plate i and the inner surface of the operating lever ω come into contact.

Next, when the control lever Xun returns to its original position.

In the order of FIG. 14, FIG. 11, and FIG. 8, the inner wall 47 of the first fitting part of the operating lever pushes the guide inclined surface of the positioning protrusion 31, moves the lock plate B to the sector plate side, and is in the locked state. becomes.

As described above, the cam member attachment, the fitting part blade, the positioning protrusion 31, and the fitting part mallet may be configured so that the locking plate n can be switched between locking and unlocking, and the positional relationship between them is as follows. is not limited to the arrangement structure shown in the figure, and in this embodiment, a cam member 19 is formed on the lock release member 16, a fitting part blade and a positioning protrusion 31 are formed on the lock plate 23, and the operation lever Fitting part 46
However, each of them may have a fitting part blade on the lock release member 16, a cam member 19 and a fitting part catch on the lock plate n, and a positioning protrusion 31 on the operating lever 40. .

48 is a bush that fits into the fitting recess 15 of the sector plate 12, 49 is a spring that biases the operating lever ω toward the lock side, and the marks are the operating lever ω, the lock plate n, the lock release member 16, and the sector plate 12. 51 is a cover for the spiral spring 7.

FIG. 17 shows the cam member W and the positioning protrusion 3.
This figure shows the second embodiment of No. 1, and the fitting portion 30.46
each flat surface 21.33 abutting the inner wall 6.47 of
The cam member 9 and the positioning protrusion 31 can be easily rotated by forming an inclined surface that gradually becomes higher toward the rear in the unlocking rotational direction.

(effect) Next, we will discuss the effect.

The present invention has the above-mentioned configuration, and the fixed main shaft 5 includes:
The sector plate 12, the lock release member 16, the lock plate n, and the operating lever ω are connected to the lock release member 16.
Cam parts! 9.19 is the fitting part blade of the lock plate n) 23, which is fitted into the positioning protrusion 31 of the lock plate n.
31 is mounted so as to come into contact with the inner surface of the operating lever 40, the lock plate n is positioned on the sector plate □ side by the cam action of the 1 positioning protrusion 31, 31, and the lock gear part r meshes with the sector gear part 14 and is locked ( 5, 6, and 7), the back seat 2 is held at a predetermined tilt angle position.

However, since the operation lever cutter and the lock release member 16 are fixed by the pin Kaede and Fox so that they always rotate together,
When the operating lever 44 is pulled upward, the operating lever ω rotates the bottle 44, (2) in the A direction in FIG. 6, and the bottle 44 rotates the lock release member 16 in the A direction.

Since the lock plate n cannot rotate relative to the fixed main shaft 5 due to its key groove I and the key protrusion 4 of the fixed main shaft 5, the cam member 19 is a lock plate).
23 as shown in FIGS. 5 to 8, and comes into contact with the inner wall 6 of the fitting portion.

The cam member 19 is formed on the engagement slope side that is low on the front side in the unlock rotation direction and becomes higher toward the rear side, so that when the lock release member 16 is further rotated by the operation lever 40, the engagement occurs. Due to the cam action on the inclined surface side, the entire lock plate is laterally moved outward while being guided by the key protrusion of the fixed main shaft 5 (FIG. 11).

On the other hand, since the operating lever ω is formed with a fitting portion 6, the positioning protrusion 31 of the lock plate 23 fits into the fitting portion 6 in accordance with the rotation of the cam member 19.

Therefore, when the operating lever ω moves the lock plate to the outside, the lock gear part n of the lock plate n separates from the sector gear part 14 of the sector plate 12, and the one-turn bracket 4 and the sector plate 12 become unlocked, and the back can be freely moved. The inclination angle of the canopy sheet 2 can be adjusted.

After the tilt angle of the backrest seat 2 #AtrJ, the operation lever 40
When you release your hand, the operating lever cutter is rotated toward the lock side by the elasticity of the spring, and the rotation of the operating lever cutter also rotates the cam member 19 of the lock release member 16, so that the fitting part of the lock plate i (to) is rotated. On the other hand, the inner wall 47 of the fitting part of the operating lever ω is the positioning protrusion 3 of the lock plate 23.
Since the guide slope support 1 is pushed, the lock plate 23 is moved inward by the cam action of the positioning protrusion 31, and the lock plate 23 is in a locked state where the lock gear part n meshes with the sector gear part 14, and the backrest seat 2 is held at an adjusted tilt angle.

(Effects) The conventionally known Japanese Utility Model Application Publication No. 60-193145 discloses a fixed main shaft fixed to a fixed bracket fixed to the seat side, and a backrest seat rotatably fixed to the fixed main shaft. a rotating bracket fixed to one side; a sector plate fixed to one side of the rotating bracket and having an insertion hole through which the fixed main shaft passes;
A fan-shaped sector gear portion centered on the insertion hole formed in the sector plate, a lock plate pivoted to a shaft other than the fixed main shaft, and a claw-shaped lock pawl formed at the tip of the lock plate. A reclining device for a vehicle seat is disclosed, which includes a control lever pivoted on the shaft of the lock plate for rotating the lock plate. A rotating bracket fixed to the backrest seat side and a sector plate fixed to one side of the rotating bracket 2 are pivoted to the fixed main shaft, but the lock plate and its operating lever are It is fixed to a shaft that is different from the main shaft!
It was completed. As a result, the overall structure inevitably becomes larger, and despite its large size, the number of meshing teeth between the sector plate and lock plate decreases, resulting in teeth breaking when a large load is applied. There was an issue.

However, the present invention includes a fixed main shaft 5 fixed to a fixed bracket 3 fixed to the seat 1 side, and a backrest seat 2 rotatably fixed to the fixed main shaft 5.
A rotating bracket 4 fixed at a height of 111 m, a sector plate 12 fixed to one side of the rotating bracket 4 and having an insertion hole 13 formed in the center thereof through which the fixed main shaft 5 passes, and a sector plate 12 formed at the mouth of the sector plate. a radial sector gear part 14 centered on the insertion hole 13, a lock plate n that is only free to slide with respect to the fixed main shaft 5, and a lock plate n on the side of the lock plate 23 facing the sector plate part. a radial lock gear portion n formed, the lock plate 4, and the sector plate) 12
a lock release member 16 located between and rotatably inserted into the fixed main shaft 5; an operating lever mounted on the fixed main shaft 5 for rotating the lock release member 16; This is a vehicle seat reclining device comprising a cam member 19 for separating the lock plate 23, which is provided.
Since all the necessary members are mounted on the - fixed main shafts 5, the structure is simple and compact, and the number of meshing teeth is large, so there is no loss of teeth.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the installation on the seat, Fig. 2 is an assembled perspective view, Fig. 3 is a perspective view of the cam member, Fig. 4 is a partially cutaway perspective view, and Fig. 5 is a partially sectional view of the locked state. 6 to 16 are working state diagrams, and FIG. 17 is a diagram of a second embodiment of the cam member. Explanation of symbols 1... Seat seat, 2... Back seat, 3... Fixed bracket, 4... Rotating bracket, 5... Fixed main shaft, 6... Engagement groove, 7 ... spiral spring,
8...flange, 9...different diameter part, 10...fitting hole, 11...insertion hole, side...sector plate, ! 3
... Insertion hole, 14 ... Sector gear part, 15 ... Fitting recess, 16 ... Lock release member, 17 ... Insertion hole, 18 ... Through hole, 19 ... Cam member, Addition... Engagement inclined surface, 21... Flat surface, Shio... Upright surface, 23.
...Lock plate, 24...Insertion hole, δ...Key groove, Sakae...Key protrusion, 27...Lock gear part, 28
... Fitting recess, 29... Long hole, 30... Fitting part,
31...Positioning protrusion, η...Guiding slope, illusion...
...flat surface, ah...standing surface, 40...operation lever,
42...Insertion hole, wing...Through hole, 44...Bin, 4
5... Inner wall, 46... Fitting portion, 47... Inner wall, 4
8...butsu, 49.../<ne, mark...dust-proof cover, 51...cover Figure 14 Figure 15 Figure 1 Figure 12 Procedural amendment (voluntary)

Claims (1)

[Claims] A fixed main shaft 5 fixed to a fixed bracket 3 fixed to the seat 1 side, and the fixed main shaft 5
A rotating bracket 4 fixed to the side of the back seat 2 which is rotatably pivoted to the seat, and an insertion hole 13 fixed to one side of the rotating bracket 4 through which the fixed main shaft 5 passes through, are fixed to one side of the rotating bracket 4. A sector plate 12 formed in the sector plate 12, a radial sector gear portion 14 centered on the insertion hole 13 formed in the sector plate 12, a lock plate 23 that can only slide freely with respect to the fixed main shaft 5, and the lock plate 12. a radial lock gear portion 27 formed on the side of the plate 23 facing the sector plate 12; and a lock release member located between the lock plate 23 and the sector plate 12 and rotatably inserted into the fixed main shaft 5. 16, an operating lever 40 mounted on the fixed main shaft 5 for rotating the lock release member 16;
A vehicle seat reclining device comprising a cam member 19 for separating the lock plate 23 provided on the lock release member 16.