JPS6173616A - Lamber support apparatus of car seat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objectives) The present invention relates to a ramper device for an automobile seat. Automobile seats are often not equipped with a running arm support device that changes the strength of support for the occupant's lumbar region in order to reduce fatigue and improve riding comfort during long-distance drives.

Japanese Patent Publication No. 55-49 disclosing a ramper support device states that when a separately assembled 92 damper support device is attached to a seat back frame, is the ramper support attached to a bracket fixed to the seatback frame?
stop the route. This method requires troublesome bolt tightening work and requires a large number of man-hours for assembly. Also, special public service 56-1005
No. 1 is Lampasa! ? -) is directly fixed to the frame □, but since a complicated ratchet mechanism is attached to the large frame as an afterthought, it is troublesome to handle and requires heavy assembly work. The present invention is intended to solve the problems of the prior art as described above, and is intended to solve the problems of the prior art as described above.

An object of the present invention is to provide a bumper support device for an automobile seat that fits into one hole and the other U-shaped groove of a fixed F9ket.

(Structure) According to the present invention, the adjusting member is connected to the pressing member disposed at the waist of the trunk of the trunk via a hardening adjustment spring, and the connecting member or the adjusting member is connected to the pressing member disposed at the waist of the trunk of the trunk. A technical means is used to fit and support the bracket into one hole of the bracket fixed to both sides of the frame and the U-shaped groove of the other bracket. By employing this means, the installation work is extremely easy because the connecting member or the adjusting member of the ramper support is simply fitted and supported in the hole and U-shaped groove of the bracket fixed to the seat puncture frame.

(Embodiment) Figures 1 to 4 show a first embodiment of the present invention, in which 1 is a seat back frame, 2 is a frame line, 3 is a seat spring molded in an S shape, and the side part 4 is Chryso f5 on the frame line 2
The end portion 6 which is stopped by the seat back frame 1 and extends downward is supported by the seat back frame 1. T is seat reclining (
(not shown) is fixed to the seat back frame 1 by welding, and one end 8 bent inward has a U
A groove 9 is provided.

10 is fixed to the seat back frame 1 by another bracket, one retaining pin 11 is fixed to the lower part, and one elongated hole 12 is provided near the center. Reference numerals 13 and 13' denote adjustment members, which are arranged on both sides of the inside of the seat back frame 1, and shafts 14 and 14' are fixed near the center;
4 is the other shaft 14' inserted into the elongated hole 12 of the bracket 10.
is pivotally supported in the U-shaped groove 9 of the bracket 7, and has an inverted U-shaped arm 15.15' at the top, and a connecting rod 16 to which an adjustment member 13.13' is connected to the end thereof. is fixed. Further, the adjusting member on the side 13 is provided with teeth 17 on the lower side that engage with the engagement pin. Reference numeral 18 is an E-IJ ring for fixing the shaft 14 to the bracket 10.

19 is an operating handle attached to the shaft 14. 20
is a pressing spring serving as a pressing member, and has a U-shape facing downward, with a horizontal portion 21 disposed behind the S spring 3, and hook portions 22 at the bottom of both ends. 1 is pivotally supported in a groove 24 of a bracket 23 fixed to the lower part of the bracket 1. Reference numeral 25.25' denotes a hardness adjustment spring, one end of which is attached to the adjustment member 13.13' and the other end of which is stretched to the side of the pressing spring 20.

The operation will be explained below.

The state shown in the figure shows the position where the hardness of the lumbar port has been adjusted to a weak level. First, in this state (FIG. 2), the line of load action of the stiffness adjustment spring 25, that is, the arm 15 of the adjustment member 13 of the spring 25 connects the tension point A and the mouth of the upper end side of the pressure spring 20. The line extends beyond the support point C of the pressing spring 20, and no moment is generated in the pressing spring 20, and no load is generated to press the S spring 3.

Next, if the passenger sits down in that state and leans back on the seat back, the S
The spring 3 is pushed backwards, and with that movement, the pressure spring 20 also moves backwards.If we consider the position where it has moved to the second line, for example, it will be hard; passes through a place tl away from the support point of the pressure spring 20, and a counterclockwise moment is generated around the support point of the suppression spring 20. However, the moment at this time is small in that the deflection of the hard adjustment spring 25 is small and the generated load is small, and the moment arm t from the support point is also short and small. Therefore, the pressing force on the lumbar region is weak.

When the lumburner port is to be strongly adjusted, when the operating handle 19 is rotated counterclockwise about the shaft 14, the adjusting member 13.13' is also rotated.

With that rotation, the teeth 17 of the adjusting member 13, which had been engaged with the retaining pin 11 of 10 (2), resist the force of the hard adjusting spring 25. It operates to the medium and strong positions while riding on the engagement pin 11. Looking at the pressing load on the lumbar vertebrae in the strong position, the upper tension point A of the hard pot adjustment spring 25.25' changes to A', and the load action line passes through A' and mouth'. , passes through a point 7'Ct2, which is far away from the support point C of the pressing spring 20. At this time, the moment around the support point t2 of the suppressing member 20 is large, and the deflection of the hardness adjustment spring 24°24' is also large, so the moment arm t2 from the support point t2 is large. becomes very large. Therefore, the pressing force on the lumbar vertebrae becomes stronger.

7- of the Ramper Sara sorting device that operates with the above groove formation
To explain how to assemble it to the toppack frame 1, in FIG.
3', after inserting the shaft 14 on one end into the elongated hole 12 of the bracket 10, insert the shaft 14' on the other end into the U-shaped groove 9 of the bracket T.
Insert the shaft 14 into the shaft from above and secure it with the E17 ring 18 (Fig. 3). Next, a bracket 23 is provided with the hook portion 22 of the pressing spring 20 at the lower part of the seat back frame 1.
After hooking into the groove 24 of the adjustment member 13.1, the rigid adjustment spring 25.25'
3' inverted U-shaped arm 15.15 and pressing spring 2
Multiplying by 0 completes the process, which is very easy.

The assembly order is as follows: In addition to the above, the adjustment member 13.13' is installed, and then the adjustment member 13.1.3' is pressed. If the ring 20 is attached to each hard adjustment spring 25, 25, the hook portion 22 of the pressing spring 20 may be hooked to the groove 24 of the bracket 23 of the seat back frame 1.

Also, υ1°Am member 13.13'E to stop movement in the axial direction
Although the ring 18 is provided, if the support length of the flanged shaft 14' on the other end side is made the width of the U-shaped groove 9 of the bracket γ, and the movement in the axial direction is restricted, the E ring 18 is also unnecessary. It is extremely easy to assemble.

5 to 8 show that the same effect can be obtained even if the structure of the first ramper support device is changed in the second embodiment, and the same parts are given the same reference numerals, and the different parts will be described. A bracket 7 for attaching a seat recliner (not shown) fixed to the seat back frame 1 is provided with one hole 26 at one end 8 which is bent inward. The other bracket 10 is otherwise the same except that it has a downwardly extending portion 27 and is provided with one inverted U-groove 28 at its end. The adjusting member 13 is provided only on one side, and the connecting member 16 (first embodiment) is stopped at t.
The letter-shaped arm 15 (first embodiment) is changed to a straight arm 29. 30 is a pressing member and a lever 31 extends upward.
One hole 32 is provided at the upper end, and one horizontally extending torque rod 33 is inserted and fixed at the lower end. The torque rod 33 has a protruding portion 34 on the left side of the lever 31 at one end, is supported by the inverted U groove 28 of the bracket 10, the other end is also pivotally supported in the hole 25 of the bracket 70, and has a horizontal portion 35 at the center. It is bent upward into a crank shape. Reference numeral 36 designates a washer fixed to the protruding portion 34 of the torque rod 33, which restricts the movement of the torque rod 33 in the left-right direction when the torque rod 33 is supported by the inverted U-shaped groove 28 of the bracket 10. Reference numeral 37 denotes a suppression grate, which is pivotally supported on the horizontal portion 35 of the torque rod 33 bent into a crank shape. The hardness adjustment spring 25 is stretched between the end of the straight arm 29 extending upwardly of the adjustment member 13 and the hole 32 at the upper end of the lever 31 of the pressing member 30.

The operation is the same as that of the first embodiment, but in the case of the hardness adjustment operation shown in FIG. The line of load action connecting the installation point A and the opening is the support point No. 11' of the suppressing member 30.11'- From the support point No. 1, where the stiffness adjustment spring 25 has little deflection and the generated load is small, although it passes through a distant place. Since the moment arm t1 of is also short, the moment of the pressing member 30 is small, and the pressing force of the lumbar vertebrae is
·weak. To adjust from the weak position to the strong position, use the operating handle 1! When the adjusting member 13 is rotated counterclockwise around the shaft 14, the adjusting member 13 also rotates. With that rotation ′
The adjustment member 13 has a hard adjustment spring 25 that causes the teeth 17 that were engaged with the retaining pin 11 of the bracket 10 to resist against the force and raise the engaging pin 11 by 9'' to a medium and strong force. When the adjusting member 13 is turned to the strong position, the upper tension of the hard Φ adjusting spring 25Q, which is stretched between the It1i! 29 of the adjusting member 13 and the hole 32 at the end of the lever 31 of the pressing member 30, is activated. The installation point A changes to A' and becomes a tilted state. When the occupant is seated in this state and leans back on the seat back, the suppression plate 37 is pushed rearward and the lever 31 that extends upward is moved by the pivot point of the torque rod 33. The supporting dimension is rotated clockwise in the rotation 9, and the load action line passing through the tension point A' and opening of the hardness adjusting gooseberry/gug 25 is far away from the pivot point C of the dimension pressing member 30, and the hardness is adjusted. The deflection of the spring 25 is also large, and the generated load is large.
As the moment arm 1t becomes larger, the moment of the pressing member 30 becomes larger, and the pressing force on the lumbar vertebrae becomes stronger.

As shown in FIG. 8, this method of assembly involves attaching the hardness adjustment spring 25 to the adjustment member 13 and the pressing member 30, and inserting the shaft 14 of the adjustment member 13 into the elongated hole 12 of the bracket 10. Fix the ring 18 (Fig. 7). Then, insert one end of the torque rod 33 of the pressing member 30 into the hole 2 of the bracket 7.
6 and the other end extends below the bracket 10.
This is completed by engaging the inverted groove provided at 7, which is very simple as in the first embodiment.

The structure described above makes it easy to assemble to the seat back frame 1), and there is no need to assemble the ramper support device separately, so the total assembly requires very few man-hours, and the seat frame parts can be assembled effectively. It is possible to reduce the number of structural parts and parts used in the process, and when combined with the above effects, a large cost reduction can be achieved.

A disadvantage of the structure in which the adjusting member or the suppressing member is supported on both sides of the seat back frame is that assembly due to interference between mating parts due to manufacturing variations in the width dimension of the adjusting member or pressing member and the width dimension of the seat back frame. In order to avoid these problems, it is necessary to improve the precision of parts.

The drawback is that a member for restricting the horizontal movement of the adjusting member 13, 13' or the suppressing member 30 is provided on one side (adjusting member 1
In the case of 3.13', the E ring 18 or E +7 ring 18 attached to the shaft 14 is fixed to reduce the length of the support portion of the flanged shaft 14'. In the case of the suppressing member 30, the left end of the torque rod 33 is a washer 36 fixed to the lever 31 with a slight gap), and the other side is a shaft with a sufficient support length to absorb even if the manufacturing dimensions are uneven. It is a structure. Also, as mentioned above, the shaft with the members that restrict left-right movement and other parts cannot be assembled if the support holes of brackets 1 and 1G are both round holes. U
The solution is to create a groove.

(The suppression member or Th1 node member is fixed to the seatback frame by using the fit between the effect hole and the groove. Therefore, it is said that the instrumental difference in the width direction of the seatback frame can be absorbed. Sometimes..

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the first embodiment of the present invention, and FIG. 2 is a perspective view of the first embodiment of the present invention.
Figure 3 is a sectional view taken along line B-B in Figure 2, Figure 4 is a perspective view showing the assembly order of KII 8I4, and Figure M5 is a second embodiment of the present invention. Perspective view showing 6th
The figure is a view from C of Prisoner 5, and Figure 7 is D-D of Figure 6.
The top view and FIG. 8 are perspective views for explaining the assembly sequence. In the diagram: 1... Seat back frame, 7.10...
Bracket, 9...U-shaped groove, 10...Bin, i3.
13'... Adjustment member, 20... Suppression member, 25.2
5'...Harden adjustment spring.

Claims (1)

[Claims] It has a pressing member disposed at the waist of the seat back, and an adjusting member connected to the pressing member via a rigid adjustment spring, and the pressing member or the adjusting member is attached to both sides of the U-shaped seat back frame. A lumbar support device for an automobile seat, characterized in that it is supported in a hole in one fixed bracket and in a U-shaped groove in the other bracket.