Angle adjustment device and seat with same angle adjustment device

Abstract

The invention discloses an angle adjustment device which comprises a ratchet wheel, sliding blocks which are provided with outer gears, a cullis which can rotate relative to the ratchet wheel and an expansion and contraction mechanism; the expansion and contraction mechanism comprises a flange and wedge blocks, wherein the flange is arranged on the cullis, and each wedge block is arranged between the flange and each sliding block, and each wedge block is in abutting connection with the flange through an elastic part in circumferential direction; the inner end of the sliding block is matched with the wedge block for self-locking in radial direction, the circumferential self-locking surface of the flange is matched with the wedge block for self-locking in radial direction, and the self-locking angles are both greater than zero; when the wedge blocks move in the direction of resisting the elasticity of the elastic parts, the wedge blocks and the sliding blocks all move to the center of the flange. The angle adjustment device solves the contradiction between the full-stroke self-locking and the unlocking stroke increase, the operating experience of the user is improved, so that the unlocking process is simple and convenient, and easy to achieve. The invention further discloses a seat comprising the angle adjustment device, and the operation effect of the user is good.

Description

technical field [0001] The present invention relates to the technical field of mechanical design, and more specifically, relates to an angle adjusting device. In addition, the present invention also relates to a seat comprising the above-mentioned angle adjusting device. Background technique [0002] During the use of the seat, in order to meet the needs of different users, the angle of the backrest and the seat seat can be adjusted to enhance the comfort of the seat. This technology is more common in vehicles and operating machinery. With the development of the machinery industry, higher requirements are put forward for the accuracy of the seat angle adjustment device. [0003] In the prior art, the seat angle adjustment device usually includes a ratchet wheel with internal teeth fixedly connected to the backrest, a chute plate with a chute fixedly connected to the seat pan, a slider with teeth is arranged on the chute plate, and a cam The radial movement of the slider is...

AI Technical Summary

Problems solved by technology

Usually, in order to increase the range of self-locking in the prior art, the unlocking stroke will be increased, resulting in an increase in the rotation angle of the unlocking process, which will affect the implementation of the unlocking operation. When it is applied to the angle adjustment of the seat back, it needs The user can only unlock the locked state of the seat back by turning a large unlocking angle, which makes the use process inconvenient and greatly affects the user's operating experience

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