JPH0420667Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat bottom tilting device for adjusting the inclination angle of the seat surface of a chair constituting various types of seats such as vehicle seats or aircraft seats. be.

[Conventional technology]

Conventionally, the inclination angle of the seat surface of a chair constituting various types of seats such as vehicle seats or aircraft seats has fluctuated.In general, in this type of device, the bottom frame constituting the seat surface is a reclining device. The chair has a structure that is connected to and pivots with a back frame that changes the inclination angle, and when the seat back of the chair is adjusted in inclination, the seat surface is interlocked to have a preferred inclination angle.

[The problem that the idea attempts to solve]

However, as people's physiques have improved in recent years, the differences in the physique of seat users have become larger.For example, the back of the thighs of people with long shins will rise above the seat surface. If the overall seat height is raised, problems such as the feet of users with short shins not being able to reach the floor will arise, and an increasing proportion of users will not be able to obtain a comfortable sitting feeling with the average chair structure. are doing.

The present invention was devised in view of the above problem, and the inclination angle of the seat surface of the chair that constitutes the seat can be adjusted independently according to the preferences of the user of various seats such as vehicle seats or aircraft seats. It is an object of the present invention to provide a seat bottom tilting device that can be smoothly adjusted.

[Means to solve the problem]

In order to achieve the above object, the seat bottom tilting device for a seat according to the present invention has a rear end portion of the bottom frame so that the front end of the bottom frame can swing vertically with respect to the support frame of the chair. At the same time, a sliding plate is fixed to the lower surface of the front end of the bottom frame, and a gear is connected to an operating handle that is rotatably pivoted with respect to the sliding plate and a support frame located below the sliding plate. The wedge-shaped sliding member has a first wedge surface formed with an inwardly curved arc-shaped gear that meshes with the gear, and a second wedge surface. has a different center from the above-mentioned arc-shaped gear and constitutes an outwardly curved arc-shaped sliding surface,
Further, by rotating the wedge-shaped sliding member, the sliding plate is moved up and down while its arcuate sliding surface is in sliding contact with the sliding plate.

[Effect]

According to the above configuration, when the operating handle is swung, the wedge-shaped sliding member meshed with the gear that rotates together with the operating handle moves back and forth between the sliding plate fixed to the lower surface of the front end of the bottom frame and the gear. Moving. However, since the rear end of the bottom frame is pivotally connected, the support height of the front end of the bottom frame changes depending on the insertion position of the wedge-shaped sliding member. The angle of inclination of the surface can be adjusted.

In particular, since the sliding plate and the arcuate sliding surface are in line contact, the bottom frame can be raised smoothly.

〔Example〕

An embodiment of the seat bottom tilting device according to the present invention will be described below with reference to the drawings.

The drawing shows a seat for two people, with a support frame 2 integrated with a leg frame 1, seat bottoms 3, 3 and seat backs 4, 4 for each two people.
is provided, and armrests 5, 5 are fixedly installed on both sides of the frame 1. The seat bottom tilting device according to the present invention is constructed between a bottom frame 6 that supports each of the seat bottoms 3 and the support frame 2, and the rear end of the bottom frame 6 is connected to a bracket bored in the support frame 2. 7 via a pin shaft 8 so as to be swingable. In addition, a wedge-shaped sliding member is provided in the bearing bracket 9 drilled on the lower surface of the front end of the bottom frame 6, with an arc-shaped guide hole 12 inserted through the pin shaft 10 so as to be slidable relative to the pin shaft 10. It is formed by pivotally connecting the member 11. The wedge-shaped sliding member 11 constitutes an arc-shaped gear 13 in which a first wedge surface is suitably curved inward, and a second wedge surface forms an arc-shaped sliding surface 14 whose center is different from that of the arc-shaped gear 13 and which is curved outward. The arc-shaped guide hole 12 is constructed along the arc-shaped sliding surface 14, and since the centers of the arc-shaped gear 13 and the arc-shaped sliding surface 14 are different, It forms a curved wedge that is thick in the direction B and thin in the B direction. The arcuate gear 13 of the wedge-shaped sliding member 11 is connected to the gear 1 which is pivoted on a handle shaft 16 which is disposed in a bracket 15 bored in the support frame 2.
7, and the handle shaft 16 is
A gear 17 of the same mechanism configured on the other side of the bottom frame 6 is pivoted, and one end is bent toward the front of the seat to form an operating handle 18. Reference numeral 19 denotes a sliding plate fixed to the lower surface of the bottom frame 6 so as to be in sliding contact with the arcuate sliding surface 14 of the wedge-shaped sliding member 11 in a low friction state through line contact.

In the seat bottom tilting device having the above configuration, when the operating handle 18 is swung (arrow C), the gear 17 is rotated via the handle shaft 16. The mold sliding member 11 moves between the sliding plate 19 and the gear 17 in the direction of arrow AB using the arc-shaped guide hole 12 as a guide, and the relative height position of the front end of the bottom frame 6 is changed. At this time, since the rear end of the bottom frame 6 is pivotally mounted on a bracket 7 projecting from the support frame 2 via a pin shaft 8, the bottom frame 6 is moved by the movement of the wedge-shaped sliding member 11.
The inclination angle of the seat bottom 3 is changed, and the inclination angle of the seating surface of the seat bottom 3 is changed.

[Effect of idea]

Since the seat bottom tilting device according to the present invention is configured as described above, the bottom frame that supports the seat bottom has the seat back independently attached to the support frame via the respective tilting means. A preferred inclination angle of the seat surface can be obtained independently of the inclination angle of the seat back.

In particular, since the sliding plate and the arc-shaped sliding surface are in line contact, the bottom frame can be smoothly moved up and down by rotating the wedge-shaped sliding member. The practical effects after implementation are extremely large.

[Brief explanation of drawings]

Fig. 1 is a side view showing one embodiment of the seat bottom inclination device according to the present invention, Fig. 2 is a side view of the main part, Fig. 3 is a front view of the main part, and Fig. 4 is a seat bottom inclination. 1 is a schematic front view of a two-seater chair implementing the device; FIG. 2...Support frame, 3...Seat bottom, 6
...Bottom frame, 10...Pin shaft, 12...
Arc-shaped guide hole, 13... Arc-shaped gear, 14...
Arc-shaped sliding surface, 16...handle shaft, 18...operation handle, 19... sliding surface.

Claims (1)

[Claims for Utility Model Registration] The rear end of the bottom frame is pivotally connected to the support frame of the chair so that the front end of the bottom frame can swing vertically, and the lower surface of the front end of the bottom frame is A sliding plate is fixedly installed, and a wedge-shaped sliding member is inserted and pivoted between the sliding plate and a gear that is pivoted to an operating handle that is rotatably pivoted relative to the supporting frame located below the sliding plate. The wedge-shaped sliding member has an inwardly curved arc-shaped gear that meshes with the gear on its first wedge surface, and
The second wedge surface has a different center from the arcuate gear and constitutes an outwardly curved arcuate sliding surface, and by rotating the wedge-shaped sliding member, the arcuate sliding surface slides into the sliding surface. A seat bottom tilting device characterized in that the sliding plate is configured to move up and down while slidingly contacting the plate.