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Electric fan

a technology of electric fans and fans, applied in the direction of non-positive displacement fluid engines, pump components, piston pumps, etc., can solve the problems of still too concentrated airflow and blowing light objects around, and achieve the effect of gentle airflow

Inactive Publication Date: 2011-06-02
CHEN I HUANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The main object of the present invention is to provide an electric fan that provides gentle airflow.
[0008]An electric fan comprises a bracket, a transmission assembly, a linking assembly, a swing object and a fan. The bracket has two stands and at least one slot. The at least one slot is formed through one of the stands. The transmission assembly is mounted on the bracket and has a motor and a driven unit. The motor has an output shaft between the stands. The driven unit is attached rotatably to the bracket. The linking assembly is connected to the transmission assembly and has at least one bottom linking rod, at least one middle linking rod, a top linking rod and a guide rod. Each one of the at least one bottom linking rod has a bottom end and a top end. The at least one bottom end of the at least one bottom linking rod is connected securely to the driven unit. Each one of the at least one middle linking rod has a bottom end and a top end. The at least one bottom end of the at least one middle linking rod is connected pivotally to the at least one top end of the at least one bottom linking rod. The top linking rod has a bottom end and a top end. The bottom end of the top linking rod is connected pivotally to the at least one top end of the at least one middle linking rod. The guide rod is mounted through the bottom end of the top linking rod and the at least one top end of the at least one middle linking rod to connect the top linking rod and the middle linking rod pivotally, and is mounted movably through the at least one slot of the bracket. The swing object is connected pivotally to the top end of the top linking rod. A positioning shaft is mounted through the stands and the swing object to connect the swing object and the stands pivotally. The fan is connected to the swing object. The transmission assembly is actuated to drive the linking assembly and the swing object to move so the fan can swing up and down. Therefore, the electric fan provides gentle and sustained airflow to dissipate heat and make users feel truly comfortable.

Problems solved by technology

However, this creates a tunnel effect, where a strong and concentrated channel of air is produced, which is uncomfortable and blows light objects around.
Although the conventional electric fan can be control to rotate and provide week airflow, the airflow still too concentrated.

Method used

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Embodiment Construction

[0017]With reference to FIGS. 1 and 2, an electric fan in accordance with the present invention comprises a bracket (10), a transmission assembly (20), a linking assembly (30), a swing object (40) and a fan (50).

[0018]The bracket (10) has two stands (11) being parallel to each other. At least one of the stands (11) has a slot (12) formed longitudinally through the stand (11).

[0019]The transmission assembly (20) is mounted on the bracket (10) and has a motor (21) and a driven unit (22). The motor (21) has an output shaft (211) protruding between the stands (11). The output shaft (211) may be a worm rod. The driven unit (22) is attached rotatably to the bracket (10), is connected to and drove by the output shaft (211) and may have a worm gear engaging the output shaft (211).

[0020]With further reference to FIG. 3, the linking assembly (30) is connected to the transmission assembly (20) and has at least one bottom linking rod (31), at least one middle linking rod (32), a top linking rod...

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PUM

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Abstract

An electric fan has a bracket, a transmission assembly, a linking assembly, a swing object and a fan. The transmission assembly is mounted on the bracket. The linking assembly is connected to the transmission assembly. The swing object is connected pivotally to the linking assembly. The fan is connected to the swing object. The transmission assembly is actuated to drive the fan to swing up and down and provide gentle and sustained airflow so users can feel truly comfortable.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an electric fan, and more particularly to an electric fan that provides gentle airflow.[0003]2. Description of the Prior Arts[0004]An electric fan circulates air for improved comfort.[0005]A conventional electric fan has a motor driving a rotor to move the air. However, this creates a tunnel effect, where a strong and concentrated channel of air is produced, which is uncomfortable and blows light objects around. Although the conventional electric fan can be control to rotate and provide week airflow, the airflow still too concentrated.[0006]To overcome the shortcomings, the present invention provides an electric fan to mitigate or obviate the aforementioned problems.SUMMARY OF THE INVENTION[0007]The main object of the present invention is to provide an electric fan that provides gentle airflow.[0008]An electric fan comprises a bracket, a transmission assembly, a linking assembly, a swing...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04D25/06F04D29/26
CPCF04D33/00
Inventor CHEN, I-HUANG
Owner CHEN I HUANG
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