JPH0436672Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention allows fine adjustment of the tilt angle of the seat back by finely and coarsely swinging the swing arm on the seat back side with respect to the base member on the seat cushion side. The present invention also relates to a coarsely adjustable reclining device.

“Conventional technology” Conventional reclining devices include, for example,
A fine adjustment mechanism that can finely adjust the swing angle of the swing arm on the seat back side, and a coarse adjustment mechanism that allows coarse adjustment of the swing angle of the swing arm by connecting and disengaging the restraint member to the member on the fine adjustment mechanism side. There are some things that have this.

``Problems to be solved by the invention'' However, in such conventional reclining devices, in order for the restraint member to reliably engage the member on the fine adjustment mechanism side, a certain level of precision is required from the viewpoint of component accuracy and installation accuracy. We have no choice but to set a tolerance,
Therefore, when engaged, a gap is created between the engaging member and the member on the fine adjustment mechanism side, causing problems such as rattling or abnormal noise due to vibrations, etc.

The present invention was developed by focusing on these conventional problems, and is designed to prevent rattling and abnormal noise caused by vibration etc. between the restraint member and the member on the fine adjustment mechanism side when they are engaged. The purpose is to provide a reclining device with

"Means for Solving the Problem" The gist of the present invention to achieve this purpose is to: swing the swing arm on the seat back side finely and coarsely with respect to the base member on the seat cushion side; In a reclining device capable of finely and coarsely adjusting the tilting angle of a seat back, the restraint member is swingably supported on the base member side in three positions: a disengaged position, an incompletely engaged position, and a fully engaged position. and a tooth portion with a high tooth length carved on the swing arm side, and a tooth portion formed on the restraining member, the tooth portion being deeply engaged with the tooth portion when the fully engaged position is in place, and the tooth portion having a high tooth depth is formed on the restraining member. a rough adjustment mechanism having a pawl that engages shallowly with the teeth so that the swing arm can tilt within a minute range when the swing arm is in the aligned position; and a tooth depth carved on the swing arm side. low continuous fine teeth; and a toothing portion formed on the restraint member that engages and disengages from the continuous fine teeth to restrain the swinging arm at a desired position within the minute range when in the fully engaged position; A reclining device comprising: a fine adjustment mechanism having the following features:

"Function" To coarsely adjust the swing angle of the swing arm on the seat back side, swing the restraint member to the release position,
The swing arm is made roughly swingable, and the swing arm is rotated to a desired swing angle. The swinging arm is maintained at a desired swinging angle, and the claw portion of the restraining member is brought into an incompletely engaged position where it is shallowly engaged with the teeth on the swinging arm side.

At this time, since the engaging portion of the restraint member does not engage with the continuous fine teeth on the restraint member side, the swing arm can swing within a very small range.

To finely adjust the swing angle of the swing arm,
The restraining member swinging arm swings within a very small range to bring the engaging portion of the restraining member into a fully engaged position where it engages with the continuous fine teeth on the restraining member side.

When the restraint member is in the fully engaged position, an excessive load is applied to the swing arm via the seat back.
If the engaging part of the restraint member were to come off the continuous fine teeth, the claws of the restraint member would be deeply engaged with the teeth with high teeth, so the swinging arm would be restrained by the restraint member and would not be able to swing. It does not move and the seat bag remains restrained and intact.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

1 to 3 show a first embodiment of the present invention.

As shown in FIGS. 1 and 3, a swing arm 20 on the seat back side is pivotably attached to a base member 10 on the seat cushion side by a pivot shaft 30. As shown in FIGS.

The pivot 30 has a dial 3 for fine adjustment at one end.
1 is fixedly installed, and a sun gear 32 is attached to the other end.
is fixed. The sun gear 32 has a planetary gear 3
4 are engaged. The planetary gear 34 meshes with an internal gear 22 formed on the swing arm 20 and also meshes with an internal gear 42 formed on the relay member 40. The relay member 40 is fitted into the fitting recess 12 of the base member 10 and rotatably supported by the pivot 30.

That is, the fine adjustment mechanism includes a reduction mechanism including a sun gear 32, a planetary gear 34, an internal gear 22 of the swing arm 20, and an internal gear 42 of the relay member 40.

The outer peripheral edge of the relay member 40 is provided with a toothed portion 4 having a high tooth depth.
4 is engraved. A restraining member 16 is pivotally supported on the base member 10 so as to be swingable in three positions: a detached position, an incompletely engaged position, and a fully engaged position.
The restraining member 16 is engaged and disengaged by the operation lever 50 so as to be engaged with and disengaged from the tooth portion 44 . The operating lever 50 is rotatably attached to the pivot shaft 30, and the arm 5 for operating the operating lever 50
A link member 54 is connected to the link member 5.
A push-up pin 56 is fixed to the end of 4. The push-up pin 56 is connected to the lower edge 17 of the restraint member 16
By pushing upward, the restraint member 16 is configured to mesh with the teeth 44 of the relay member 40.

As shown in FIG. 2, the restraint member 16 includes claws 18, 18 that can engage with the teeth 44 of the relay member 40.
is formed.

Continuous fine teeth 46 are carved on the tips of the tooth portions 44 of the relay member 40. The continuous fine teeth 46 have a lower tooth depth and a finer pitch than the tooth portions 44. Claw portion 1 of restraining member 16
Between 8 and 18, a meshing portion 19 is formed which meshes shallowly with the continuous fine teeth 46.

That is, the detached position is between the claw portion 18 and the tooth portion 44.
is in a disengaged state, and the incompletely engaged position is at claw part 1.
8 and the tooth portion 44 mesh with each other, and the meshing portion 19
The fully engaged position is a state in which the meshing portion 19 and the continuous fine teeth 46 are in mesh with each other.

As shown in FIG. 5, the tooth portion 44 of the relay member 40
It is also possible to form continuous fine teeth 46a on the bottom of the teeth, and form an engaging part 19a at the tip of the claw part 18 of the restraining member 16, which engages shallowly with the continuous fine teeth 46a without rattling.

Further, as shown in FIG.
It is also possible to form an engaging portion 19a at the swinging end of the restraint member 16, which engages the continuous fine teeth 46b shallowly without rattling.

Next, the action will be explained.

In order to roughly adjust the swing angle of the swing arm 20 from the state shown by the solid line to the state shown by the imaginary line in FIG. push-up pin 5
6 is removed from the lower edge 17 of the restraint member 16, and the claw portion 18 of the restraint member 16 is brought to the detached position where it is removed from the tooth portion 44 of the relay member 40. As a result, the swing arm 2
0 is not restrained to the base member 10 side and is in a swingable state. The swinging arm 20 is swung counterclockwise in FIG. 1 to the swinging angle shown by the imaginary line. Keeping the swing arm 20 at that swing angle, operate the operating lever 50 and push up the lower edge 17 of the restraining member 16 with the push-up pin 56 of the link member 54.
By swinging the restraint member 16, the claw portion 18 of the restraint member 16
is shallowly engaged with the tooth portion 44 of the relay member 40 to be in an incompletely engaged position.

When the claw portion 18 of the restraining member 16 reaches the incomplete engagement position where it is shallowly engaged with the tooth portion 44 of the relay member 40, the claw portion 18 can be displaced within a minute range between the adjacent tooth portions 44.

To finely adjust the swing angle of the swing arm 20,
While the restraint member 16 restrains the relay member 40 so as not to rotate, the fine adjustment dial 31 is used to finely adjust the swing angle of the swing arm 20. Once the swinging arm 20 is at the desired tilt angle position, the restraining member 16 is swung to the fully engaged position and the meshing portion 19 of the restraining member 16 is engaged with the continuous fine teeth 46.

If an excessive load is applied to the seat back with the restraint member 16 in the fully engaged position,
An excessive load is applied via the swing arm 20 to the portion where the relay member 40 and the restraint member 16 are engaged.

At this time, if the engaging portion 19 of the restraint member 16 is unable to withstand the excessive load and comes off from the continuous fine teeth 46 of the relay member 40, the restraint member 16
Since the claw portion 18 of the relay member 40 is engaged with the tooth portion 44 of the relay member 40, it does not come off from the tooth portion 44, the restraint state of the relay member 40 is maintained, the swing arm 20 does not swing, and an excessive load is prevented. The seat back will not tilt even if the seat is tilted.

FIG. 4 shows a second embodiment of the invention.

The relay member 60 and the restraint member 70 provided on the swing arm 20 side are engaged and disengaged, and the swing arm 20 is adjusted to a seated state shown by a solid line and a forward tilted state shown by a two-dot chain line.

A protrusion 62 is formed on the relay member 60. On the other hand, a claw part 72 is formed on the restraining member 70, and an abutment pin 75 is implanted in the swing arm 20. 4, the relay member 60 cannot swing in either the clockwise or counterclockwise direction in FIG. 4, thereby preventing the swinging arm 20 from swinging.

Continuous fine teeth 64 are carved near the base of the projection 62 of the relay member 60. An engaging portion 74 is formed at the tip of the claw portion 72 of the restraining member 70 so as to mesh with the continuous fine teeth 64 without rattling.

That is, when seated, the meshing portion 74 of the restraint member 70 engages the continuous fine teeth 64 of the relay member 60.
Thereby, the swing arm 20 is restrained to the relay member 60 on the base member 10 side without any play.

In addition, if an excessive load is applied to the swing arm 20 and the restraint member 7 is unable to withstand the excessive load, the
When the meshing part 74 of 0 is removed from the continuous fine teeth 64 of the relay member 60, the claw part 72 of the restraining member does not come off from the protruding member 62 of the relay member 60, and the claw part 72
Since the protrusion 62 of the relay member 60 is maintained between the contact pin 75 and the abutment pin 75, the swing arm 20 is restrained against the base member 10 so as not to swing.

"Effect of the invention" According to the reclining device according to the invention, when the restraint member is engaged with the member on the fine adjustment mechanism side,
The claw part of the restraining member deeply engages with the member on the fine adjustment mechanism side, and the engaging part on the restraining member side meshes with the continuous fine teeth of the member on the fine adjustment mechanism side without play, so that the swinging arm Even when an excessive load is applied to the swing arm, the swing arm maintains a restrained state, which is safe, and also prevents the swing arm from rattling due to vibration or the like and from generating abnormal noise.

[Brief explanation of the drawing]

Figures 1 to 3 show a first embodiment of the present invention, with Figure 1 being a side view of the reclining device, Figure 2 being a partial view of the engaging portion of the restraint member, and Figure 3 being a side view of the reclining device. 4 is a sectional view of the main parts of the reclining device, FIG. 4 is a side view of the reclining device, and FIGS. 5 and 6 are respectively showing other embodiments of the reclining device. FIG. 3 is an explanatory diagram partially showing an engaging portion of a restraining member. 10...Base member, 16...Restriction member, 18
...Claw portion, 19...Matching portion, 20...Swinging arm, 40...Relay member, 46...Continuous fine teeth.

Claims (1)

[Claims for Utility Model Registration] A reclining device capable of finely and coarsely adjusting the tilting angle of the seat back by finely and coarsely swinging a swing arm on the seat back side with respect to a base member on the seat cushion side, comprising: a restraining member swingably supported on the base member side in three positions: a detached position, an incompletely engaged position, and a fully engaged position; and a toothed portion with high teeth carved on the swinging arm side. and is formed on the restraining member so as to deeply engage the teeth when in the fully engaged position, and to allow the swing arm to tilt within a minute range when in the incompletely engaged position. a coarse adjustment mechanism having a claw portion that shallowly engages with the tooth portion; a continuous fine tooth with a low tooth depth carved on the swing arm side; A reclining device comprising: a fine adjustment mechanism having a meshing portion that engages and disengages from the continuous fine teeth to restrain the swinging arm at a desired position within the minute range during positioning.