Bracket angle adjustment mechanism
An angle adjustment device and bracket technology, which is applied to home appliances, movable seats, chairs, etc., can solve the problems of aggravating the force component of the rotating operation force of the operating shaft 6, so as to reduce the rotating operation force, improve the transmission efficiency, and improve the strength Effect
Active Publication Date: 2006-07-12
DELTA KOGYO CO LTD
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Problems solved by technology
[0007] However, in the angle adjustment device of Patent Document 1, there are many points for improvement, and one of the problems is that when the involute tooth shape, that is, the external teeth of the external gear 4a and the internal teeth of the internal gear 5a are rotated Next, due to the component force that causes the meshing and disengagement of the external teeth and the internal teeth, the rotating operation force of the operating shaft 6 will correspondingly aggravate this part of the force
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[0043] The best mode for carrying out the present invention will be specifically described below with reference to the accompanying drawings. In addition, parts having the same configuration and function as those in the background art are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0044] Such as Figure 1 ~ Figure 3 and Figure 8 As shown, in the vehicle seat 1, bolts (not shown) formed as holes 4d for inserting bolts for the first bracket 4 are attached to the seat cushion body 2, and bolts (not shown) for inserting bolts for the holes 5d for the second bracket 5 are mounted on the seat cushion body 2. Bolts (not shown) are installed on the seat back 3, and by rotating the handle 7 of the operating shaft 20, the angle of the second bracket 5 relative to the first bracket 4, that is, the angle of the seat back 3 relative to the seat cushioning body is adjusted. 2 to adjust the front and rear inclination angles. In addition, t...
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Disclosed is a bracket angle adjustment mechanism which includes external-tooth and internal-tooth gears having improved tooth shapes allowing an operating force for rotating a control shaft to be reduced. In the bracket angle adjustment mechanism, each of external teeth ( 14 b) of the external-tooth gear 14 has a half-round shape having a center defined by a single point ''a'' on a reference circle PC ( 14 ), in a region of an addendum T 1 between the reference circle PC ( 14 ) and a tip circle AC ( 14 ), and an undercut shape in a region of a dedendum T 2 between the reference circle PC ( 14 ) and a root circle DC. Further, each of internal teeth ( 15 b) of the internal-tooth gear ( 15 ) has an arc shape free of interference with the half-round-shaped addendum region.
Description
technical field [0001] The invention relates to an angle adjustment device for a bracket. Background technique [0002] Conventionally, as shown in FIG. 18, there is a device in which a first bracket 4 is mounted on the seat cushion body 2 of, for example, a vehicle seat 1, and a second bracket 5 is mounted on the seat back 3. The handle 7 of the operating shaft 6 is rotated to adjust the angle of the second bracket 5 of the seat back 3 relative to the first bracket 4 of the seat cushion 2, that is, the front and rear inclination angle of the seat back 3 (Patent Document 1 : Japanese Patent Publication No. 63-47443 communique). [0003] Specifically, the first bracket 4 has an externally toothed gear 4a, and the second bracket 5 has an internally toothed gear 5a having a larger number of teeth than the externally toothed gear 4a. [0004] Also includes: a pair of wedge members 11A, 11B embedded in an eccentric space 10 located at the large dia...
Claims
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Login to View More IPC IPC(8): A47C1/025B60N2/22
Inventor 川岛义仁
Owner DELTA KOGYO CO LTD