JPH0321631Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to a seat reclining device.

b. Prior Art A conventional reclining device is shown in FIG. 1 (see Japanese Patent Application Laid-Open No. 57-25809). That is, RC is a reclining device with a base 1 fixed to a seat cushion (not shown).
, an arm 2 fixed to a seat back (not shown), a shaft 3 fixed to the base 1 and rotatably supporting the arm 2, and a shaft 3 passing through the base 1 and rotatable relative to the base 1. A pin 4 is pivotally supported on the pin 4, an operating lever 5 is pivotally supported on the pin 4 and is rotatable together with the pin 4, and an operating lever 5 is engaged with the pin 4 and is integrated with the operating lever 5. A cam plate 6 is rotatable and rotatably supported by a pin 7 protruding from the base 1, and a spring 8
The operating plate 9 is rotated counterclockwise by the lock plate guide 10 fixed to the base 1, and the line held by the lock plate guide 10 connects the centers of the shaft 3 and pin 4. A lock plate 11 that is slidable in the direction shown in FIG. A position pin 14 for positioning the lock plate 11 and a spring 15 for urging the operation lever 5 counterclockwise in FIG. an operating regulating plate 1 having a push plate 16 and a surface 17a fixed to the arm 2 and movable along the surface 9a of the operating plate 9;
7 and more. 9b is when arm 2 falls forward,
A stopper stepped portion 11a formed to engage with the stepped portion 6a of the cam plate 6 to prevent the cam plate 6 from returning.
1a is a second tooth formed on the lock plate 11 so as to mesh with a first tooth 2a formed on the arm 2 to regulate the inclination angle of the arm 2. A stopper portion 1b for regulating the fall and rotation is the spring 8 and 15.
A stopper bracket 18 is a foot pedal integrally formed with the operating lever 5.

However, such conventional reclining devices RC are configured so that the seat back angle can be adjusted to the preference of various occupants, so the so-called design standard tilt angle position that is determined by the manufacturer as the standard seat back angle for most people. A plurality of first teeth 2a are provided on the front and rear sides of the arm 2.
is formed.

Therefore, in order to tilt the arm 2 of this reclining device RC forward, push the operating lever 5 onto the pin 4.
When the arm 2 is pulled up, the cam plate 6 rotates clockwise, the cam groove 13 forces the movement pin 14 downward, and the second tooth 11a is attached to the arm 2 via the lock plate 11 that is integrated with the movement pin 14. The arms 2 are disengaged from the first tooth 2a, and the arm 2 is tilted forward (also referred to as tilted forward) by a return spring (not shown). Then, since the surface 17a of the operating regulating plate 17 engages with the surface 9a of the operating plate 9, the stopper step 9b of the operating plate 9 and the step 6a of the cam plate 6
The operating lever 5 is maintained in the raised position.

Next, when a force in the backward tilting direction is applied to the seat bag (not shown) that has been folded forward, the arm 2 rotates due to the force, and the surface 9a of the operating plate 9
As a result, the surface 17a of the operating regulating plate 17 comes off, and the operating plate 9 is rotated counterclockwise in FIG.
The stopper step portion 9b is then separated, and the cam plate 6 is rotated counterclockwise around the pin 4 by the biasing force of the spring 15 biased against the bushing plate 16, and the cam groove 13 causes the boss pin 14 to move upward. The lock plate 11 is forcibly moved to the second tooth 1 of the lock plate 11.
1a will re-mesh with the first tooth 2a of arm 2. This re-meshing position is at the front side of the first tooth 2a, which is forward of the design standard angle of inclination, forcing a cramped posture. Also, it is not easy to get on and off.

c. Purpose of the invention In view of the prior art, the present invention is designed so that when the arm is returned from the forward tilted state to the upright state, the first
It is an object of the present invention to solve the above-mentioned problem by making the re-meshing position between the tooth and the second tooth of the lock plate not at the front side of the first tooth but at the design standard inclination angle position.

d. Structure of the device In order to achieve this purpose, a base fixed to the seat cushion and an arm fixed to the seat bag are connected by a shaft, and the teeth formed on the arm are fixed to the base. In a seat reclining device in which a seat back is pivotally supported to be fixed at any inclination by a lock plate guide and teeth formed on a lock plate positioned by a cam plate, the seat back is slidably supported on the shaft and is mounted on an arm. an operating regulating plate having teeth capable of engaging with teeth formed on the lock plate and biased in a direction to ensure engagement of the teeth; and an operating plate that is swung integrally with the lock plate. , a cam plate pivotally supported by a pin on the base and biased through a position pin on the lock plate so that teeth on the plate mesh with teeth formed on the arm; a front operating lever having a protruding piece that contacts a protruding piece of the cam plate to rotate the cam plate; a protruding piece that is pivotally supported by the pin of the base and can abut with the pin of the operating lever; and a lever having a recess that can be engaged with and disengaged from a pin on the operating regulation plate, thereby providing an operating regulation plate for setting a reclining position memory,
By providing a rotational difference between the lock release and reclining memory release (change) operations, each person's favorite position can be stored arbitrarily.

e Example This invention will be explained below based on the drawings.

2 to 6 are diagrams showing an embodiment of this invention. The same or equivalent parts and parts as in FIG. 1 will be denoted by the same reference numerals and redundant explanation will be omitted.

First, to explain the configuration, RC' is the reclining device of the present invention, 20 is formed in a bifurcated shape,
The operating regulating plate has a long groove 20b in the center and is slidably and rotatably supported on the shaft 3 by the long groove 20b.One tongue piece 20c of the plate 20 has a pin 20d and a shaft 3. The one tongue piece 20c is held by a spring 22 stretched between the tongue pieces 20c.
is biased in three directions of the shaft. 20e is
The teeth are provided on the end 20f of one tongue piece 20c and engage with the tooth profile 2a formed on the arm 2 by the biasing force of the spring 22. 24 is screw 26
The surface 24a on the operating plate 24 is fixed on the lock plate 11 via the position pin 14. When the operating plate 24 moves in a direction away from the shaft 3, It is possible to slide into contact with the surface 20a. The tooth profile 28 on the lock plate 11 engages and disengages from the tooth profile 2a on the arm 2, thereby fixing the inclination angle of the arm 2 arbitrarily. Reference numeral 18 denotes a rear foot pedal that is supported by a pin 4 independently of the front operating lever 5 and is biased counterclockwise in the figure by a spring (not shown). The operating lever 5 and the foot pedal 18 are provided with protrusions 5a and 18a, respectively, and as the operating lever 5 and the foot pedal 18 rotate clockwise in the figure, the cam plate 6 pivoted on the pin 4 protrudes. It comes into contact with the piece 6b and rotates the cam plate 6 clockwise in the figure. The cam plate 6 is urged counterclockwise in the figure by a spring (not shown) around the pin 4.

The lock plate 11 is held by a lock plate guide 10 fixed to the base 1, and is movable only in a direction along a line connecting the shaft 3 and the pin 4.

32 is rotatably supported on the pin 4 on the base 1, has a protrusion 32a that can come into contact with the pin 5b on the front operating lever 5, and is stretched between the protrusion 32a and the pin 5b. This lever is biased counterclockwise in the figure around the pin 4 by a spring 34. 32
Reference character b denotes a recess provided at one end of the lever 32, and is formed so as to abut and engage with the pin 20d on the operating regulating plate 20 to position the pin 20d. 32c is a surface that is in contact with the shaft 3 fixedly installed on the base 1, and is designed to restrict rotation of the lever 32 in the counterclockwise direction in the figure.

Reference numeral 36 denotes a long groove provided on the base 1, which serves as a stopper that engages with a pin 2b fixedly provided on the arm 2 to restrict the range of rotation of the arm 2.

38 is a spring for biasing the front operating lever 5 in the counterclockwise direction in the figure.

Since the present invention has the above-mentioned configuration, the operation will be explained next.

[When the arm 2 is tilted forward] In FIG. 2, when the foot pedal 18 is stepped on and rotated clockwise in the figure, the protrusion 18a on the foot pedal 18 pushes the protrusion 6b on the cam plate 6, and the cam plate 6 Rotate clockwise around pin 4. Beaution pin 1 engaged with cam groove 13 on cam plate 6
4, the lock plate 11 is pulled toward the pin 4, the teeth 28 are disengaged from the teeth 2a on the arm 2, the arm 2 becomes free, and a spring (not shown) moves the arm 2 as shown in FIG. The body falls forward. At this time, the operating plate 24, which is integrally fixed to the lock plate 11 with the screws 26, is attached to the surface 24a on the operating plate 24.
The movement of the arm 2 away from the pin 4 on the operating regulating plate 20 is also regulated, and the arm 2 is held in a free state.

[When returning the arm 2 to the neutral state] When the arm 2 is returned from the state shown in FIG. During movement and sliding contact, the state in which the engagement between the teeth 2a and the teeth 28 is regulated is maintained. and side 2
When the engagement between the pin 4a and the surface 20a is disengaged and the arm 2 comes to the memorized position, the lock plate 11 can move in the direction away from the pin 4, and the tooth 28 engages the tooth 2a, and the arm returns to the memorized position. 2 is locked (Figure 2).

A similar operation can be performed using the front operating lever 5 as shown in FIG.

[When changing the neutral memory position of the arm 2] From FIG. 4, if the front operating lever 5 is further rotated clockwise in the figure, the pin 5b on the operating lever 5 will move the protrusion 32a on the lever 32. Push and rotate the lever 32 clockwise around the pin 4 so that the recess 32b on the lever 32 comes into contact with the pin 20d on the operating regulation plate 20. This state is shown in FIG.

When the operating lever 5 is further rotated, the lever 3
Since the recess 32b of 2 pushes the pin 20d, the long groove 2
0b moves the operating regulating plate 20 to the right, and the teeth 20e and 2a are disengaged (FIG. 6).

At this time, due to the shape of the recess 32b, the pin 20d
is positioned, and therefore the position of the operating regulating plate 20 is maintained relative to the arm 2. When arm 2 is moved in this state, the positional relationship between arm 2 and operating regulation plate 20 changes. When the arm 2 is moved to an arbitrary position and the operating lever 5 is returned, the lever 32 is rotated counterclockwise by the spring 34 and separated from the pin 20d, so the operating regulating plate 20 is moved to the left by the spring 22.
The tooth 20e re-engages with the tooth 2a on the arm 2, its position is memorized, and when the operating lever 5 is further returned, the protruding piece 5a separates from the protruding piece 6a, so the cam plate 6 rotates counterclockwise. However, as the lock plate 11 moves in the direction away from the pin 4 via the movement pin 14, the teeth 28 and the teeth 2a engage, and the arm 2
is fixed to the base 1.

In the above example, when the front operating lever 5 is rotated, the arm 2 is unlocked and the operating regulation plate 2 is
Although a difference in position is provided between the engagement and disengagement of the arm 2 with the arm 2, this can be made, for example, by bringing the pin 5b and the protruding piece 32a into contact from the beginning or by integrating the operating lever 5 and the lever 32 at the same time. Once this is done, the front operating lever 5 can be used exclusively for changing the reclining angle and the storage position, and the rear foot pedal 18 can be used more clearly as a lever exclusively for tilting forward.

FIG. 7 shows another embodiment.

This embodiment differs from the first embodiment in that the foot pedal 18 on the rear side is removed, and is made possible by using the operating lever 5 on the front side in two stages. That is,
When the arm 2 is to be tilted forward, the operating lever 5 is operated to a position between FIGS. 4 and 5, and when the arm 2 is to be reclined, it is operated to a position between the positions shown in FIG. 6.

In this case, by increasing the spring constant of the spring 22, erroneous operation can be prevented and a check function can be provided. In other words, the forward tilting operation is relatively light, and the reclining operation is made possible by increasing the weight in steps.

f Effects of the invention As explained above, according to this invention,
The configuration includes an operation regulation plate for setting the reclining position memory, and a difference in position for unlocking and reclining memory release (change) operations, allowing each person to arbitrarily memorize their preferred position, and seatback. Even if you move it forward, it will always return to its original position, and at the same time,
The effect is that the forward tilting operation and the storage position changing operation can be performed without any erroneous operation.

[Brief explanation of the drawing]

FIG. 1 is a front explanatory view of a conventional reclining device, FIG. 2 is a front explanatory view of a reclining device according to an embodiment of the present invention, and FIG. 3 is a forward leaning state due to operation of the foot pedal in FIG. 4 and 5 are front explanatory views showing the state in which the engagement of the tooth profile is released by operating the operating lever in Fig. 2, and Fig. 6 is an explanatory front view showing the state in which the engagement of the tooth profile is released by operating the operating lever in Fig. 6. FIG. 7 is an explanatory front view of a reclining device according to another embodiment of the present invention. RC, RC'... Reclining device, 1... Base fixed to the seat cushion, 2... Arm fixed to the seat back, 2a... Tooth profile, 3
...Shaft, 4...Pin, 5...Operation lever,
5a... Projection piece of operating lever 5, 6... Cam plate, 1
0...Lock plate guide, 11...Lock plate, 14...Position pin, 20...Operating regulation plate, 20d...Pin of operating regulation plate 20, 20e...Teeth of operating regulation plate 20, 24... ...Operating plate, 28...Tooth profile of lock plate 11, 6b...
...Protruding piece of cam plate 6, 32...Lever, 32a...
Projection piece of lever 32, 32b... recessed part of lever 32.

Claims (1)

[Claims for Utility Model Registration] A base fixed to the seat cushion and an arm fixed to the seat bag are connected by a shaft 3, and a tooth profile formed on the arm and a lock fixed to the base are connected. In a seat reclining device in which a seat back is pivotally supported to be fixed at any inclination by a tooth profile formed on a lock plate positioned by a plate guide and a cam plate, the seat back is slidably supported on the shaft and mounted on an arm. an operating regulating plate that has teeth that can engage with the formed tooth profile and is biased in a direction that ensures engagement of the teeth; an operating plate that swings integrally with the lock plate; and a base. a cam plate which is pivotally supported by the pin on the base and biased through a position pin on the lock plate so that the tooth profile on the plate meshes with the tooth profile formed on the arm; a front operating lever having a protruding piece that rotates the cam plate by abutting the protruding piece of the base; a protruding piece that is pivotally supported by the pin of the base and capable of abutting the pin of the operating lever; A seat reclining device comprising: a lever having a recess that can be engaged with and disengaged from a pin on an adjustment plate;