Electric fan with adjustable pitching angle

Abstract

The invention discloses an electric fan with an adjustable pitching angle. A pitching rotating rack is hinged at the upper end of a support frame and can rotate up and down around the support frame; an oscillating mechanism is arranged above the pitching rotating rack and can rotate left and right relative to the pitching rotating rack; an adjusting and locating mechanism is arranged between the support frame and the pitching rotating rack, is used for adjusting and fixing the pitching angle between the support frame and the pitching rotating rack, and comprises a locating block; the locating block is arranged at the bottom of the pitching rotating rack; a plurality of tooth-shaped clamping positions are arranged on the bottom end surface of the locating block; a clamp foot is arranged at the bottom of the support frame and can elastically deform downwards under the action of an external force; and a projection or a groove is arranged on the top end surface of the clamp foot, is matched with tooth-shaped clamping positions to form different pitching angles, and can be clamped in or separated from the tooth-shaped clamping positions along with the elastic deformation of the clamp foot. Compared with a traditional spring ball structure only depending on side locating, the electric fan has the advantages that the effective contact area is large, the locating is more reliable, and meanwhile a user only needs to directly rotate the pitching rotating rack to obtain different pitching angles, so that the operation is convenient.

Description

technical field [0001] The invention relates to a fan, in particular to an electric fan with adjustable pitch angle. Background technique [0002] In order to meet the multi-directional air supply requirements of consumers, the existing electric fans are generally equipped with mechanisms for shaking the head left and right and up and down, mainly including two types, one is to use two motors to drive and control two groups of four-bar mechanisms respectively Shaking the head and shaking the head up and down have many parts, complex structure, high manufacturing cost, and troublesome manufacturing; the other is to use a motor to control the left and right shaking of the head, and the up and down shaking of the head is manually adjusted by adjusting the positioning device. figure 1 , is the existing electric fan with manually adjustable pitch angle, which mainly includes a support frame 2' connected to the base, the upper end of the support frame 2' is hinged with a pitch tur...

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Problems solved by technology

[0002] In order to meet the multi-directional air supply requirements of consumers, the existing electric fans are generally equipped with mechanisms for shaking the head left and right and up and down, mainly including two types, one is to use two motors to drive and control two groups of four-bar mechanisms respectively Shaking the head and shaking the head up and down have many parts, complex structure, high manufacturing cost, and troublesome manufacturing; the other is to use a motor to control the left and right shaking of the head, and the up and down shaking of the head is manually adjusted by adjusting the positioning device. figure 1 , is the existing electric fan with manually adjustable pitch angle, which mainly includes a support frame 2' connected to the base, the upper end of the support frame 2' is hinged with a pitch turret 3' that can rotate up and down around the support frame 2', the support frame 2 An adjustment and positioning mechanism for adjusting and positioning the pitch angle between the support frame 2' and the pitchi

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