JPH0525486Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a lumbar support device installed in the seat back of an automobile seat.
This invention relates to an improvement in the operating mechanism of a side support device.

(Prior Art) Some conventional automobile seats have a seat back equipped with a lumbar support device and a side support device to improve sitting comfort.

The operation parts (operation knob, operation lever, etc.) of the lumbar support device and the side support device are each independently arranged on one side of the seat back.

(Problems to be solved by the invention) Conventional automobile seats equipped with the above-mentioned lumbar support device and side support device have two operating sections independently disposed above and below the seat back. The two operating sections must be spaced apart from each other to prevent confusion and incorrect operation.

Therefore, it is necessary to arrange the operating section of the side support device above the operating section of the lumbar support device. Therefore, since the operating portion of the side support device must be provided at a high position on the seat back, there is a problem in that the operability is extremely poor when adjusting the side support device when the passenger is seated. Additionally, there is a disadvantage in that the design is restricted due to space considerations.

Therefore, an object of the present invention is to provide an operation mechanism for a side support device and a lumbar support device that has good operability and has fewer design restrictions.

(Means for Solving the Problems) In order to achieve the above object, the operating mechanism of the side support device and lumbar support device of the present invention includes a lumbar gear that applies driving rotational force to the lumbar support actuating part, and a driving rotational force to the side support actuating part. a side gear that applies force; a switching gear that meshes with the lumbar gear and the side gear, respectively;
A drive shaft to which this switching gear is fixed and has an operation knob integrated therein, and a tube shaft to which a switching lever is fixed, which has an integrated switching cam that penetrates this drive shaft and switches the switching gear to a lumbar gear or a side gear. It is composed of

(Function) Since the present invention has such a structure, when the switching lever is operated, the switching cam integrally connected to the switching lever rotates. Therefore, the tube shaft integrated with the switching cam moves, and the switching gear rotatably attached to this tube shaft moves and meshes with the lumbar gear or side gear that applies driving force to the lumbar support device or side support device. do. Next, when the operating knob is rotated, the switching gear that is integrated with the drive shaft to which the operating knob is fixed rotates, and the lumbar gear or side gear that meshes with this switching gear is driven, so the lumbar support device or side support device The rotational force of the operating knob is transmitted to the two, and either one is operated and adjusted.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a frame structure of a seat bag equipped with an operating mechanism for a side support device and a lumbar support device according to the present invention.
The lower end of frame 1' is pivotally connected to the reinforcing plate 30 of the back frame 3, and is connected to one frame 11 by a connecting frame 12 so that the other frame 11' can rotate in opposite directions. ing. A side support operating section 1 is provided at the upper end of one of the frames 11.

In the figure, reference numeral 21 denotes a lumbar plate constituting a lumbar support device.
2 is fixed, and the rotating shaft 22 is integrally provided with a movable piece 23 that comes into contact with a cam 24 constituting the lumbar support actuating section 2. As the cam 24 rotates, the movable piece 23, the rotating shaft 22, Connecting rod 21
In this structure, the lumbar plate 21 rotates in the front-rear direction via a and 21a to press against the lumbar vertebrae of the seated person.

Hereinafter, the operating mechanisms of the side support device and lumbar support device according to the present invention will be specifically explained with reference to FIGS. 2 to 6.

An inner bracket 50 and an outer bracket 60 are arranged side by side with an interval at the bottom of the back frame 3 of the seat bag, and these two brackets 50,
a lumbar gear 26 that applies a driving rotational force to the lumbar support actuating part 2 between 60 and 60; a side gear 19 that is arranged in parallel with the lumbar gear 26 in the front-rear direction of the seat and applies a driving rotational force to the side support actuating part 1; A switching gear 40 that meshes with both gears 26 and 19 is provided. Further, both gears 26 and 19 are rotatably supported by an inner bracket 50 and an outer bracket 60. In the figure, 52, 62, 53, 63 are both gears 26,
This is a through hole through which the support shafts 13a and 25 that rotatably support the support shaft 19 are inserted.

A cam cover 70 is provided on the outside of the outer bracket 60.
There is a guide link 45 inside, and this guide link 45
A tube shaft 44 rotatably inserted through a long hole 45a provided at the tip of the tube shaft 44, and a switching cam 4 integrated with the tube shaft 44.
3 are arranged.

Further, a drive shaft 42 is rotatably inserted into the tube shaft 44, and the switching gear 40 is fixed to one end of the drive shaft 42, and the operating knob 41 is fixed to the other end. The inner bracket 50, the outer bracket 60, and the cam cover 70 are each provided with a circular ring so that the drive shaft 42 can be moved by the switching cam 43 and the switching gear 40 can mesh from the side gear 19 to the lumbar gear 26 and in the opposite direction. Arc-shaped long holes 51, 61, and 71 are opened.

FIG. 3 shows the side support operating section 1 and its operating mechanism. A screw shaft 13 is integrally provided on the support shaft 13a of the side gear 19, and this screw shaft 13 is supported by a bracket 15 and is screwed into a nut 14. has been done.

The nut 14 is slidably inserted into the guide hole 17a of the holder 17, and one end of the side frame 11 is fixed to the holder 17.
16 in the figure connects the support shaft 13a to the inner bracket 50.
A collar 18 is a bearing provided on the back frame 3, which is rotatably inserted into the side frame 1.
1 is pivotably attached at one end.

A switching gear 40 is engaged with the side gear 19 by a switching cam 43, and this switching gear 40 is integrally provided with the operating knob 41 via a drive shaft 42. Therefore, when the operation knob 41 is rotated, the rotational force is transmitted to the side gear 19 via the switching gear 40, and when the side gear 19 rotates, the screw shaft 13 integrated with this gear 19 rotates, and the nut 14 is rotated. is advanced and retreated in the axial direction of the screw shaft 13.

As the nut 14 moves, the side frame 11 of the holder 17 rotates in the width direction of the seat bag about the pivot portion of the bearing 18, thereby supporting the side of the seated person's body.

FIG. 4 shows the lumbar support operating section 1 and its operating mechanism. A cam 24 is integrally connected to the support shaft 35 of the lumbar gear 26, and the movable piece 23 is in contact with the cam 24.

The lumbar gear 26 has a switching cam 43.
The switching gear 40 meshes with the switching gear 40, and the operating knob 41 is integrally provided with the switching gear 40 via the drive shaft 42 as described above.
When the cam 24 of the lumbar support operating section 1 is rotated, the cam 24 of the lumbar support actuating section 1 rotates. Therefore, the movable piece 23 moves and rotates the lumbar plate 21 in the front-rear direction via the rotating shaft 22 and the connecting rods 21a, 21a, thereby supporting the lumbar vertebrae of the seated person.

FIG. 5 shows an exploded view of the main parts, which are integrally connected to a tube shaft 44 of a switching cam 43, and this tube shaft 44 is inserted into a long hole 45a of a guide link 45.
A torsion spring 47 is provided between the switching cam 43 and the cam cover 70. This spring 4
7 urges the switching cam 43 to come into contact with one inner wall surface 72 or 72' of the cam cover 70.

The relationship between the switching cam 43, the switching gear 40, the lumbar gear 26, and the side gear 19 and their operations are shown in FIG.

Since the switching lever 46, tube shaft 44, and switching cam 43 are integrally attached, the switching lever 4
6, the switching cam 43 is rotated by the guide link 45. The rotation of the switching cam 43 causes the drive shaft 42 to move between the operation knob 41 and the switching gear 40.
In addition, each bracket 50, 60, 70 has a long hole 5.
1, 61, the switching gear 40 switches from the side gear 19 to the lumbar gear 26, or from the lumbar gear 26 to the side gear 19, and engages with it.

Therefore, when the operation knob 41 is rotated, the switching gear 40 is rotated via the drive shaft 42, and the lumbar gear 19 or the side gear 19 is rotated. Therefore, the lumbar support actuator 2 operates via the lumbar gear 19, and the side support actuator 1 operates via the side gear 19.

(Effects) According to the present invention, by using the switching cam and the switching gear, the lumbar support device and the support device can be operated with one operation knob. Therefore, it is not necessary to provide the operating knob of the lumbar support device and the operating knob of the side support device, as in the conventional product, at intervals above and below the outer surface of the seat bag. Therefore, the operation knob of the side support device can be provided at the position where the operation knob of the lumbar support device is provided, that is, the operation knob of the side support device can be provided below with respect to the conventional product, so that the operability of the side support device is improved. Further, since only one operation knob is required, the appearance of the seat is improved. Furthermore, since the side gears are arranged in parallel on the front and rear of the seat with respect to the lumbar gear, the switching gear that meshes with both gears is also arranged in the same plane with respect to both gears. Therefore, the gear mechanism such as the lumbar gear does not protrude in the left-right direction of the seat, and can be housed compactly in the seat bag.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a perspective view of the main parts, FIG. 3 is a sectional view of the switching gear meshing with the side gear, and FIG. 4 is the switching gear with respect to the lumbar gear. FIG. 5 is an exploded perspective view, and FIG. 6 is a cross-sectional view of essential parts. In the figure, 1 is the side support operating section, 19 is the side gear, 2 is the lumbar support operating section, 26
40 is a lumbar gear, 40 is a switching gear, 41 is an operating knob, 42 is a drive shaft, 43 is a switching cam, and 44 is a tube shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] A lumbar gear that applies a driving rotational force to a lumbar support operating section;
a side gear that applies a driving rotational force to the side support actuating section; a switching gear that meshes with the lumbar gear and the side gear, respectively; a drive shaft that fixes the switching gear and has an integral operation knob; It is composed of a tube shaft having a switching cam integrated therein for switching the switching gear to a lumbar gear or a side gear, and a switching lever fixed thereto, and the switching gear selectively meshes with the lumbar gear or the side gear by the switching lever, thereby forming a lumbar support operating section. Or the operation mechanism of the side support device and lumbar support device that operates the side support actuating section.