JPH0360605A - Play eliminating structure for two stage recliner - Google Patents

Abstract

PURPOSE:To eliminate play of a recliner for a seat back by securing a damper to a lower arm, with one end of the damper in contact with a shaft 12 for pivoting a catch lever 11 for rotation while the other end being capable of contacting an upper arm 8. CONSTITUTION:When the arrangement is to be used as a recliner, an operation lever 26 is rotated to rotate a toothed member 32. This disengages the toothed member 32 from the toothed portions 34, 35 of the lower arm 2 and the lower arm may be rotated. When the operation lever 26 is released after reclining a seat back B to a required angle, the toothed member engages again with the toothed portions of the lower arm and the reclining angle is held there. Here, the lower arm 8 is united with the lower arm 2 without play between them via the damper 51.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a seat back for a two-stage recliner that can be used instead of a table by folding the seat back of a seat in an automobile etc. forward to a substantially horizontal position. Regarding the structure to prevent rattling.

[Prior Art] Recently, with the increasing luxury and variety of vehicles, for example, among the front, middle, and rear seats installed in so-called one-box cars,
In particular, it is known that the middle seat can be used as a table (for example, Japanese Patent Application Laid-Open No. 62-294
(See Publication No. 40). This is because when the seat back of the recliner is tilted forward compared to the normal seating position and the operating lever is pressed, the lock lever (catch lever) that connects the upper arm and lower arm that supports the seat back rotates. By releasing the engagement between the two and freely rotating the upper arm around its pivot portion, the back surface of the seat back can be used as a table surface.

[Problem M to be solved by the invention] However, according to the above-mentioned conventional glue Kleiner, play is likely to occur between the lower arm and the upper arm,
While the vehicle is running, it may vibrate or cause discomfort to the occupants. Therefore, when a damper is interposed between the lower arm and the upper arm and a means for eliminating backlash is adopted in which the upper arm is brought into pressure contact with the damper, the recliner has the upper arm rotatably supported by the lower arm, In addition, the upper arm engages and disengages from the lock arm, and the lock arm is rotated by a control lever, so the operation of engaging and disengaging the lock arm and upper arm becomes so heavy that it cannot be easily performed by the control lever. This causes the inconvenience of putting it away.

In view of the above-mentioned circumstances, this invention was made for the purpose of eliminating the rattling of the seat back in a two-fold recliner.

[Means for Solving the Problems] In order to solve the above problems, the present invention fixes a base plate to a seat cushion, and a lower arm rotatably supported by the base plate is connected to a tooth member by an operating lever via a tooth portion. and an upper arm rotatably supported by the lower arm is configured to be engageable and detachable from the lower arm via a catch lever that rotates in conjunction with an operating lever that rotates the tooth member, In a two-stage recliner in which the lower arm is tilted forward at a predetermined angle and the upper arm can be rotated to a substantially horizontal position when the operating lever is pushed down, the lever that interlocks with the operating lever is engaged with the catch lever. A second damper fixed to a lower arm side, the damper being removably provided and having one end abutting on a shaft rotatably supporting the catch lever and the other end abutting on the upper arm. It has a rattling structure for folding recliners.

[Operation] According to the above structure of the present invention, when used as a recliner, when the operating lever is rotated to rotate the tooth member, the engagement between the tooth member and the teeth of the lower arm is released, and the lower arm is rotated. becomes rotatable, and when the operating lever is released after inclining the seat back at a desired angle, the tooth member and the tooth portion of the lower arm engage again to maintain the inclination angle. At this time, the upper arm and lower arm are integrated with no play through the damper.

When used as a table, the operating lever is rotated to disengage the tooth member and the lower arm in the same manner as described above, and the lower arm is tilted forward by the force of the spring spring that biases it to rotate. When the catch lever is stopped at an angle and the operating lever is pushed down slightly, the catch lever rotates and disengages from the upper arm, thus
Since the upper arm is in a rotatable state, it can be turned into a table by rotating the upper arm forward to a substantially horizontal position. At this time, the upper arm moves at the same time as the damper h) ﾾ Enjoy.Furthermore, in order to return from the table state to the original Kleiner state, the upper arm must be rotated from the horizontal position to the backward tilted state. Then, the upper arm engages with the catch lever, and the upper arm presses against the damper again, integrating the upper arm and lower arm without any wobbling.

[Example] Next, a first example of the present invention will be described based on FIGS. 1 to 5. In FIGS. 1 and 2, l is a base plate fixed to the seat cushion A of the seat.

2 is a lower arm with a shaft 3 protruding from the base plate l.
and a shaft 3 is rotatably supported on the base plate 1.
An arcuate long hole 4 opened on the circumference of a predetermined radius centered on
Rotation is restricted at a predetermined angle via a pin 5 that engages with the pin 5.

A spiral spring 6 is loaded between the shaft 3 and a pin 5 protruding from the base plate l, and constantly biases the lower arm 2 to rotate counterclockwise. Reference numeral 8 denotes an upper arm fixed to the seat back B, which is rotatably supported by the lower arm 2 via a shaft 9, and has a lock pin 10 protruding from its lower end. A catch lever 11 is rotatably supported on the lower arm 2 via a shaft 12, and a spring 13 is loaded between it and the upper arm 8 to urge the upper arm 8 to rotate clockwise. An engaging portion 14 that engages and disengages from the lock bin IO is formed, and also has a lever portion 15 that extends integrally. 16 is an off lever, pivoted to lower arm 2! A curved guide portion 18 that is rotatably supported via the pin 7 and comes into contact with the lock pin IO, and a lever portion 19.19a that forms the engagement portion of the pin 5 are formed, and the spring 2
At 0, it is biased to rotate counterclockwise. Reference numeral 21 denotes a walk-in lever, which is rotatably supported by the shaft 3, has a lever part 22 formed at its upper end that comes into contact with the lever part 19, and has a wire 23 connected to its lower end.

The wire 23 is housed in a tube 25 that is secured to the base plate 1 with a catch 24 and extends to the walk-in mechanism C. Reference numeral 26 denotes an operating lever, which is rotatably supported on the shaft 3, and has a lever portion 28 formed at one end to which a knob 27 is attached, and a foot pedal 29 integrally formed at the other end. A return spring 30 is elastically mounted between the operating lever 26 and the holder plate 31, and urges the operating lever 26 to rotate in the counterclockwise direction in the drawing. A tooth member 32 is rotatably supported on a shaft 33 between the base plate l and the holder plate 31, and has teeth formed on a circumference of a predetermined radius around the shaft 3 at the lower end of the lower arm 2. 34 and a toothed portion 35 that meshes with the toothed portion 34. Reference numeral 36 designates a bottle that is protruded from one end of a swinging lever 43 (described later), passes through an arcuate long hole 38 formed in the holder plate 3, and engages with a long hole 37 drilled into the operating lever 26. ing. A cam 39 is rotatably supported by the base plate l via a shaft 40, and has one end 42 that engages with the recess 41 of the tooth member 32.

Reference numeral 43 denotes a swinging lever, which has a crank shape and is integrally connected to the cam 39 via an embossed portion 44, and is rotatable together with the cam 39 via a shaft 40. One end of the engaging pin 36 is protruded and recessed. 45
is a link lever, the end of which connects to the swinging lever 4 via a shaft 46.
3, and a pin 47 that can come into contact with the lever part 15 of the catch lever 11 is protruded from the other end. A link 48 is rotatably supported at one end by the link lever 45 and by the holder plate 31 at the other end.

Note that the shaft 12 of the catch lever 11 is attached to the lower arm 2.
A damper housing 50 is fixed as a stopper, and a damper 51 made of an elastic body such as rubber is housed in the damper housing 50.
1 can be pressed against the side surface of the upper arm 8.

Then, the shaft 12 of the catch lever 11 and the lock pin 10
The angle at which the line a connecting the respective centers of It's the same.

As shown in FIG. 3, the walk-in mechanism C includes a slide rail 52 fixed to the floor of the vehicle and a bracket 5 fixed to the movable side of the slide rail 52.
3, and a lock lever 56 provided on the bracket 53 so as to be able to move forward and backward into lock grooves 55 bored at regular intervals in the bottom surface of the fixed side of the slide rail 52 by being biased by a spring 54. The other end of the wire 23 is connected via a bracket 57. 58 is a release lever.

To explain the operation of the first embodiment, in FIG. 1, when the operating lever 26 is rotated clockwise upward in the figure at a predetermined angle to the upper limit 26a, the bin 36 moves the swinging lever 43. The one end 42 of the cam 39 rotates counterclockwise about its shaft 40 and rotates integrally with the swing lever 43, and the recess 4 of the tooth member 32
1 and rotates the tooth member 32 clockwise around its shaft 33, thereby disengaging the teeth 35 and 34, so that the lower arm 2 becomes rotatable around the shaft 3, The lower arm 2 is made to fall toward the @ side by the force of the spring spring 6 that biases it to rotate, but since the load is applied to the upper arm 8 when the seated person or their back is against the seat back B, Lower arm 2 does not fall forward. Then, the upper arm 8 is tilted backward at a desired angle against the force of the spring 6, and the operating lever 26
When released and returned to its original state, the operating lever 26 is released by the spring 30.
The pin 36 rotates counterclockwise with the force of the swinging lever 43.
As a result, the cam 39 rotates clockwise and one end 42 of the cam 39 escapes from the recess 41 of the tooth member 32. This causes the tooth member 32 to rotate counterclockwise and its teeth The portion 35 meshes with the tooth portion 34 of the lower arm 8, and the set desired inclination angle is maintained. In this way, the reclining adjustment is performed from a predetermined inclination angle P suitable for seating to a substantially horizontal position R (full flat) Q
You can freely set it between.

Next, when the rear seat occupant exits the vehicle, as shown in FIG. , the operating lever 26 rotates clockwise around the shaft 3, the teeth 35 and 34 are disengaged and disengaged in the same way as in the reclining operation, and the lower arm 2 is in a state where it can rotate around the shaft 3. Then, the lower arm 2 is tilted forward by the force of the mainspring spring 6, the pin 5 is moved to the left end of the elongated hole 4, and the tilting of the lower arm 2 is stopped. Then, in conjunction with the forward tilting movement of the lower arm 2, the lever part 15 of the catch lever 11 moves to the pin 47 of the link lever 45.
The catch lever 11 is rotated slightly counterclockwise about the shaft 12, and the engagement portion 14 and the lock pin 1O are brought into an incompletely locked state. Also, when the lower arm 2 tilts forward, the off lever 16
The lever part 19 is the lever part 2 of the walk-in lever 21.
2 and rotates it counterclockwise around the shaft 3, the wire 23 is pulled a predetermined length, the lock of the walk-in mechanism C is released, and the seat moves forward along the slide rail. Moving.

On the other hand, from this state, seat back B is moved forward, and
When forming a table in a substantially horizontal position, the link lever 45 is pressed by the lever part 15 of the catch lever 11 and stopped in a downwardly moved state, so that the operating lever 26 is moved to the upper limit 26a. Located in Therefore, as shown in FIG. 5, when the operating lever 26 is pushed down to the intermediate position 26b, the operating lever 26 rotates counterclockwise by a predetermined angle around the shaft 3, and the swinging lever 43
rotates clockwise around the shaft 40, the link lever 45 moves upward, the pin 47 at its upper end pushes the lever part 15 of the catch lever 11, and the catch lever ll rotates around the shaft 12. Because it rotates counterclockwise,
Lock pin I in an incompletely locked state with its engaging portion 14
O is removed, and the upper arm 8 becomes rotatable around the shaft 9. That is, as mentioned above, the catch lever 2 rotates slightly in conjunction with the forward tilting movement of the lower arm 2, and since the intersection angle of lines a and b is 90 degrees or less, the lock pin lO is Since it is easy to escape from the engaging portion I4, the force required to operate the catch lever 11, which is applied with the force that presses the upper arm 8 against the damper 51, with the operating lever 26 is small. Therefore, when the seat back B is pushed forward, the upper arm 8 rotates counterclockwise around the shaft 9, and the pin +3a that locks the spring 13 is inserted into the recess 2a of the lower arm 2.
and, in combination with the force of the spring 13, maintains a substantially horizontal position (table) R forward.

Then, when the upper arm 8 rotates as described above,
As shown in FIG. 5, since the lock pin 10 escapes from the guide portion 18 of the off lever 16 that is pushing the lever part 22 of the walk-in lever 21, the spring 20
The lever part 19a rotates counterclockwise around , until the lever part 19a hits the pin 5, and the lever part 19 separates from the lever part 22, so the walk-in lever 21 pulls the shaft 3 by the force of the spring 54 that pulls the wire 23. The walk-in mechanism C is then locked again, and the seat that has moved forward along the slide rails 52, 52 is fixed.
The Kleiner is held stably without turning into a table or wobbling.

In order to convert the Kleiner into a table or a seat as described above, in the state shown in FIG. The lock bin lO contacts the guide portion 18 of the off lever 16 and rotates the off lever 16 clockwise about its shaft 17, and the lever portion 1
9 pushes the lever part 22 of the walk-in lever 21 again to rotate the walk-in lever 21 counterclockwise around the shaft 3, and pulls the wire 23 again to release the lock of the walk-in mechanism C and release the catch. Lever 11
The lock pin IO engages with the engagement wJ14, and the side part of the upper arm 8 comes into contact with the damper 51, and the bin 13a moves from the recess 2a and the upper arm 8
and lower arm 2 are integrally connected. Therefore, by moving the seat rearward along the slide rails 52, 52 and pushing the seat back B backward at a desired angle against the force of the mainspring spring 6, the tooth member 32 and lower arm 2
The teeth 3, 5, and 34 mesh with each other, and the inclination angle of the sort back B is maintained at the position P.

Next, a second embodiment of the present invention will be described based on FIGS. 6 to 8. In FIGS. 6 and 7, 101 is fixed to the seat cushion A of the seat with a base plate. Reference numeral 1022 denotes a lower arm, which is rotatably supported by a shaft 103 protruding from the base plate 101, and is engaged with an arcuate long hole 104 formed on the circumference of a predetermined radius around the shaft 103 in the base plate lO■. Rotation is restricted at a predetermined angle via a matching bin 105. A spiral spring 106 is loaded between the shaft 103 and a bottle 105 protruding from the base plate 1O1, and constantly urges the lower arm 102 to rotate counterclockwise. 108 is an upper arm fixed to seat back B, lower arm 10
2 through a shaft 109, and has a lock pin 110 protruding from its lower end. A catch lever Ill is rotatably supported on the lower arm 102 via a shaft 112, and a spring 113 is elastically loaded between it and the shaft 109 to urge the upper arm 1 to rotate clockwise.
An engaging portion 114 that engages with and disengages from the lock pin 110 of No. 08 is formed, and also has a lever portion 115 that extends integrally. A pin 116 is provided protruding from the lever part 115, and this pin 116 engages with an arc-shaped elongated hole 117 formed in the lower arm 102 with the axis 112 as the center, and when the lower arm 102 falls forward, the pin 116 engages with the base plate 101. It can abut against the embossed stopper 118. A plate lever 119 is coaxial with the lock pin 110 of the upper arm 108 and connected at a predetermined angle with a predetermined length. 120 is a stopper, upper arm 10B
The upper arm 108 protrudes from the lower arm 102 and can come into contact with the side of the lower arm 102 when the upper arm 108 falls forward. Reference numeral 121 denotes a walk-in lever, which is rotatably supported on the shaft 103 and has a lever part 1 at its upper end that comes into contact with the plate lever 119.
22 is formed, and a wire 123 is connected to the lower end. The wire 123 is attached to the base plate 101 with the clasp 124.
It is housed in a tube 125 that is locked to the tube 125 and extends to the walk-in mechanism C. +26 is an operation lever, which is rotatably supported on the shaft 3, has a lever part 128 to which a knob 127 is attached at one end, and a foot pedal I29 at the other end.
are each formed integrally. Reference numeral 130 denotes a return spring, which is elastically loaded between the operating lever +26 and the holder plate 131, and urges the operating lever 126 to rotate in the counterclockwise direction in the figure. Reference numeral 132 denotes a tooth member, which connects the shaft 13 between the base plate 101 and the holder plate 131.
The lower arm 102 is rotatably supported on a shaft by a shaft 103, and is provided with a tooth portion 135 that meshes with a tooth portion 134 formed on a circumference of a predetermined radius around the shaft 103 at the lower end portion of the lower arm 102.

Reference numeral 136 denotes a bottle, which is protruded from one end of a sub-lever 143, which will be described later, and has an arc-shaped long hole 1 opened in the holder plate +31.
38 and is engaged with a long hole 137 bored in the operating lever 126. A cam I39 is rotatably supported by the base plate 101 via a shaft 140, and has one end 142 that engages with a recess 141 of the tooth member 132. Reference numeral 143 denotes a sub-lever, which has a crank shape and is integrally connected to the cam 139 via an embossed portion 144, and is rotatable together with the cam 139 via a shaft 140, with the pin 136 protruding from one end. ing. 146
is a swinging lever, one end of which is rotatably supported coaxially with the tooth member 132, and the other end of which is formed in a shape capable of coming into contact with the pin 116 of the catch lever Ill. 148
is a long hole, which is bored in the swing lever 146 and can be engaged with and interlocked with a protrusion 149 protruding from the operating lever 112.

A damper housing 150 is fixed to the lower arm 102, and the shaft +12 of the catch lever 111 is fixed as a stopper, and a damper 151 made of an elastic body such as rubber is housed in the damper housing 150.
The damper 151 can be pressed against the lock bin 110 of the upper arm lO8.

The walk-in mechanism C is the third embodiment of the first embodiment.
The configuration is the same as that shown in the figure.

To explain the operation of the second embodiment, in the reclining operation, in FIG. 6, when the operating lever 126 is rotated clockwise upward in the figure at a predetermined angle to the upper limit 126a, the pin 136 moves the sub-lever 143 along its axis. The one end 142 of the cam 139, which rotates together with the sub-lever 143, engages with the recess 141 of the tooth member 132, causing the tooth member 132 to rotate clockwise around its shaft 133. Since the lower arm 102 is rotated in the direction of the
is in a state where it can rotate around the shaft 103, and is designed to fall forward due to the force of the spring spring 106 that urges the lower arm 102 to rotate, or when the seated person places his or her back against the seat back B and the load is lifted. Since it rests on the upper arm 10B, the lower arm 102 does not fall forward. Then, when the upper arm 108 is tilted backward at a desired angle against the force of the spring 106 and the operating lever 126 is released to return to its original state, the operating lever 126 is rotated counterclockwise by the force of the spring 130. The pin 136 rotates the sub-lever 143 clockwise, and the cam 13
9 rotates clockwise and one end 142 of the tooth member 132 escapes from the recess 141 of the tooth member 132. As a result, the tooth member 132 rotates counterclockwise and the tooth 135 engages with the tooth 134 of the lower arm +02. They mesh and the desired inclination angle is maintained. In this way, the reclining adjustment can be freely set between a predetermined inclination angle P suitable for seating and a substantially horizontal rearward position (full flat) Q.

Next, when the rear seat occupant exits the vehicle, the rear seat occupant either rotates the control lever 126 upward, or presses the foot pedal 129 integrated with the control lever 126, as shown by the solid line in FIG. When depressed, the operating lever 126
The tooth portions 135 and 134 are unlocked in the same manner as the reclining operation described above, and
The lower arm 102 becomes rotatable around the shaft 103, and the force of the mainspring spring 106 lowers the lower arm 2.
falls forward, the pin 105 moves to the left end of the elongated hole 104, and the tilting of the lower arm 102 stops. When the lower arm 102 falls forward, the plate lever 119 contacts the lever part 122 of the walk-in lever 121 and rotates it counterclockwise about the shaft 103, so that the wire 123 is pulled a predetermined length. The walk-in mechanism C is unlocked and the seat moves forward along the slide rail 52. In this state, the upper arm 10
8 comes into contact with the damper 151 and is compressed to prevent the upper arm 108 from wobbling.

On the other hand, from this state, seat back B is moved forward, and
When the table is formed in a substantially horizontal position, the swing lever +46 is pushed by the pin 116 of the catch lever 111 and remains rotated in the direction of the half-hour hand, so that the operating lever 126 is positioned at the upper limit 126a. In addition, the pin 116 of the catch lever 111 comes into contact with the stopper 118, causing the catch lever 111 to rotate slightly counterclockwise, so that the engagement with the lock pin 110 is in a half-locked state. The compression horns of the upper arm 108 and the damper 151 are partially released. Therefore, as shown by the imaginary line in FIG. 8, when the operating lever 126 is pushed down to the intermediate position 126b, the operating lever 126 rotates counterclockwise by a predetermined angle about the shaft 103, and at the same time, the swinging lever 146 rotates clockwise and pushes the pin 116 of the catch lever 111, and the catch lever lIl rotates counterclockwise about the shaft 112. Therefore, the engaging portion l1
4, the lock pin 110 is completely removed, and the upper arm 108 becomes rotatable about the shaft 109.

The upper arm 8 then separates from the damper I51.

Therefore, when the seat back B is pushed forward, the upper arm 108 pivots! 09 in the counterclockwise direction, the stopper 120 comes into contact with the side surface of the lower arm 102 and stops, and the force of the spring 113 holds the substantially horizontal position (table) R forward.

When the upper arm 108 rotates as described above, the plate lever 1
19 and the lever portion 122 of the walk-in lever 121 is released, the walk-in lever 121 is rotated clockwise about the shaft 103 by the force of the spring 58 that pulls the wire 123, and thus the walk-in lever 121 is rotated clockwise about the shaft 103. The mechanism C is locked again, and the seat that has moved forward along the slide rail 52 is fixed, and is stably held without turning into a table or causing the Kleiner to wobble.

In order to convert the Kleiner into a table or a seat as described above, the upper arm 108, which is in a substantially horizontal position R, is rotated clockwise about its axis 109 in the state shown by the phantom line in FIG. When moved, the lock pin 110 engages with the engaging portion 114 of the catch lever III, and the upper arm 10B and the lower arm 102 are integrated. Next, when the lower arm 102 is rotated clockwise about the shaft 103, the plate lever 11
The lever portion 122 of the nine-way walk-in lever 121 is rotated counterclockwise to unlock the walk-in mechanism C. Therefore, the seat can be moved rearward with the seat back B in an upright state. Therefore, while moving the seat backwards along the slide rail 52,
Push the seat back B backward at a desired angle against the force of the mainspring spring 106, as shown in FIG. They engage, and the inclination angle of the seat back B is maintained at the P position.

[Effects of the Invention] According to the invention described above, in a two-stage folding recliner, it is possible to eliminate play between the catch lever that integrates the lower arm and the upper arm, and to compress the damper so that the upper arm is connected to the lower arm. When releasing the integrated catch lever, the catch lever rotates slightly and becomes half-locked with the lock pin.
This has the effect of reducing the operating force of the operating lever.

[Brief explanation of drawings]

FIG. 1 is a front view showing the first embodiment of the present invention, FIG. 2 is a right side view, FIG. 3 is a perspective view of the walk-in mechanism, FIGS. FIG. 6 is a front view showing a second embodiment of the invention, FIG. 7 is a right side view thereof, and FIG. 8 is an explanatory view of the operation of forming a table. A... Sheet, B... Note pack, 1
．． 101... Base plate, 2.102... Lower arm, 3.103... Axis, 8.108... Upper arm, to, zo... Lock pin, 11,1
t I...Catch lever 13j13...Spring, 16.19...Second lever 26,126...
・Operation lever 29.129...foot pedal, 32.
+32 Tooth member, 34.35. f34.135・
・Tooth, 39139...Cam, 50.150...3 people outside the damper housing Fig. 7 Fig. 8

Claims (1)

[Claims] (1) A base plate is fixed to the seat cushion, and the lower arm rotatably supported by the base plate can be engaged with and detached from the tooth member by an operating lever via the teeth.
Further, the upper arm rotatably supported by the lower arm is configured to be detachable from the lower arm via a catch lever that rotates in conjunction with an operating lever that rotates the tooth member, and the lower arm is moved forward in a predetermined direction. In a two-stage folding recliner that is tilted at an angle of , and the upper arm can be rotated to a substantially horizontal position when the operating lever is pushed down, a lever that interlocks with the operating lever is provided so as to be engageable with and detachable from the catch lever, and a damper whose one end abuts on a shaft rotatably supporting the catch lever and whose other end abuts on the upper arm side;
A rattling prevention structure for a two-stage recliner that is fixed to the lower arm.