A type of desktop convection fan

Abstract

A desktop convection fan includes a base, a fan holder, a fan head, a motor, a crank, a connecting rod, a transmission component, and a guide plate. The fan head is hinged to a longitudinal section. A bushing is inserted into and fixed to a bearing seat. The motor is located in a transverse base with its shaft extending out. One end of the crank is fixed to the motor shaft, and the other end is pivotally connected to the connecting rod. The other end of the connecting rod is rotatably engaged with a fixed shaft. A rotating shaft is rotatably engaged with the bushing. The guide plate is embedded in a countersunk hole and rotatably engaged. A screw passes through the guide plate and is fixed to the rotating shaft. A flange is slidably engaged with the transverse base, and an annular sleeve is inserted into a circular cavity with a clearance fit. This design lowers the center of gravity, effectively preventing overall wobbling when the fan head's motor rotates and oscillates.

Description

Technical Field

[0001] This utility model relates to a fan, and more particularly to a desktop convection fan. Background Technology

[0002] The existing technology, Chinese patent 201910295779.7, describes a USB table fan with a dust removal function, including a fan body and a base located below the fan body. The fan body has a fan cavity opening to the left, and an isolation mesh is installed inside the fan cavity. The device of this invention uses the same power source to drive the fan blades to rotate and simultaneously drive the fan body to swing, making the airflow wider. At the same time, the device uses the same power source to drive a dust removal device to remove dust from the air, purifying the air around the device. The purified air is then discharged through the rotating fan blades, allowing the user to breathe filtered air, thus possessing high practical and promotional value. The problem is that the fan body is positioned on the face, at a certain height from the supporting mask, and with high power, the fan body vibrates, causing overall swaying. Utility Model Content

[0003] The purpose of this invention is to provide a desktop convection fan that has the feature of preventing shaking.

[0004] This utility model is implemented as follows: a tabletop convection fan, characterized in that it includes a base, a fan holder, a fan head, a motor, a crank, a connecting rod, a transmission component, and a guide plate.

[0005] The base is hollow with a circular cavity with an upper opening, and includes a bearing seat with openings at the top and bottom. The lower end of the bearing seat is provided with a countersunk hole.

[0006] The fan base frame includes a horizontal base and two vertical sections. The horizontal base includes a pivot and an annular sleeve.

[0007] The transmission components include a bushing, a flange, and a transmission arm, with a fixed shaft mounted on the transmission arm;

[0008] The fan head is hinged to the longitudinal section; the bushing is inserted into the bearing seat and fixed to the bearing seat; the motor is located in the transverse base and the motor shaft extends out; one end of the crank is fixed to the motor shaft and the other end is pivotally connected to the connecting rod; the other end of the connecting rod is rotatably engaged with the fixed shaft; the rotating shaft is rotatably engaged with the bushing; the guide plate is embedded in the countersunk hole and is rotatably engaged; the screw passes through the guide plate and is fixed to the rotating shaft; the flange is slidably engaged with the transverse base; the annular sleeve is inserted into the circular cavity and is clearance-fitted.

[0009] The desktop convection fan described above is characterized in that: the bottom plate of the circular cavity is provided with a circular guide rail.

[0010] The horizontal base is provided with a plurality of ball bearing seats arranged in a circle, and each ball bearing seat has a ball bearing cavity with a lower opening.

[0011] It also includes round ball bearings;

[0012] The round balls are held inside the ball cavity and extend outwards; the round balls mate with the circular guide rail.

[0013] The desktop convection fan is characterized by having an annular ball groove with a circular arc cross-section on the annular guide rail.

[0014] The desktop convection fan is characterized by the following: the ball bearing seat is cross-shaped, including a square main cavity and four sub-cavities, and the ball bearing cavity and the prismatic part intersect.

[0015] The desktop convection fan is characterized in that: the horizontal base is provided with a circular platform with an annular rotating shaft, and the circular platform is provided with an annular cavity.

[0016] It also includes wear-resistant pads;

[0017] The wear-resistant pad is placed inside the annular cavity, and the flange is in sliding fit.

[0018] The aforementioned desktop convection fan is characterized in that: a pin is provided on the flange of the transmission component.

[0019] The top of the bearing seat is provided with a pin hole; the pin body and the pin hole are inserted into each other.

[0020] This utility model discloses a desktop convection fan. Due to its structure, the center of gravity is lowered, and the overall shaking is effectively prevented when the motor of the fan head rotates and swings. Attached Figure Description

[0021] Figure 1 This is a half-view of the present invention.

[0022] Figure 2 yes Figure 1 A-A view.

[0023] Figure 3 This is one of the exploded perspective views of this utility model.

[0024] Figure 4 This is the second exploded perspective view of this utility model.

[0025] Figure 5 yes Figure 4 A magnified view of a portion of the image.

[0026] Figure 6 This is one of the perspective views of this utility model.

[0027] Figure 7 This is the second perspective view of this utility model. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] like Figure 1 , Figure 2 As shown, a desktop convection fan includes a base 1, a fan holder 2, a fan head 3, a motor 4, a crank 5, a connecting rod 6, a transmission component 7, and a guide plate 8.

[0031] The base 1 is hollow with a circular cavity 11 with an upper opening and a bearing 12 with upper and lower openings. The lower end of the bearing 12 is provided with a countersunk hole 13.

[0032] The fan holder 2 includes a horizontal base 21 and two vertical parts 22. The horizontal base 21 includes a pivot 211 and an annular sleeve 212.

[0033] The transmission component 7 includes a bushing 71, a flange 72, and a transmission arm 73, with a fixed shaft on the transmission arm 73;

[0034] The fan head 3 is hinged to the longitudinal part 22; the bushing 71 is inserted into the bearing seat 12 and fixed to the bearing seat 12; the motor 4 is located in the transverse base 21 and the motor shaft extends out of the transverse base 21; one end of the crank 5 is fixed to the shaft of the motor 4 and the other end is pivotally connected to the connecting rod 6; the other end of the connecting rod 6 is rotatably engaged with the fixed shaft; the rotating shaft 211 is rotatably engaged with the bushing 71; the guide plate 8 is embedded in the countersunk hole 13 and is rotatably engaged; the screw passes through the guide plate 8 and is fixed to the rotating shaft 211; the flange 72 is slidably engaged with the transverse base 21; the annular sleeve 212 is inserted into the circular cavity 11 and is clearance engaged.

[0035] The transmission component 7 has a pin 721 on its flange 71.

[0036] The top of the bearing seat 12 is provided with a pin hole 121; the pin body 721 is inserted into the pin hole 121.

[0037] As a further improvement of this utility model: a circular guide rail 111 is provided on the bottom plate of the circular cavity 11.

[0038] The horizontal base 21 is provided with a plurality of ball bearing seats 213 arranged in a circle, and the ball bearing seats 213 are provided with ball bearing cavities with lower openings.

[0039] It also includes round ball bearings 9;

[0040] The circular ball bearing 9 remains within the ball bearing cavity and extends outwards; the circular ball bearing 9 mates with the annular guide rail 213. This structure ensures smooth oscillation during swinging and effectively prevents the fan holder from shaking.

[0041] As a further improvement of this utility model: the annular guide rail 111 is provided with an annular ball groove with a cross-section of arc; the circular ball 9 cooperates with the annular ball groove.

[0042] As a further improvement of this utility model: the ball seat 213 is cross-shaped, including a square main cavity and four sub-cavities. The ball cavity and the edge intersect. This structure reduces the friction between the circular ball 9 and the ball cavity.

[0043] As a further improvement of this utility model: the transverse base 21 is provided with an annular platform 214 with an annular rotating shaft 211, and the annular platform 214 is provided with an annular cavity 2141 with a lower opening.

[0044] It also includes wear-resistant pad 10;

[0045] The wear-resistant pad 10 is disposed in the annular cavity 2141, and the flange 72 is in sliding fit.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A table top convection fan characterized by: Includes base, fan holder, fan head, motor, crank, connecting rod, transmission components, and guide plate. The base is hollow with a circular cavity with an upper opening, and includes a bearing seat with openings at the top and bottom. The lower end of the bearing seat is provided with a countersunk hole. The fan base frame includes a horizontal base and two vertical sections. The horizontal base includes a pivot and an annular sleeve. The transmission components include a bushing, a flange, and a transmission arm, with a fixed shaft mounted on the transmission arm; The fan head is hinged to the longitudinal section; the bushing is inserted into the bearing seat and fixed to the bearing seat; the motor is located in the transverse base and the motor shaft extends out; one end of the crank is fixed to the motor shaft and the other end is pivotally connected to the connecting rod; the other end of the connecting rod is rotatably engaged with the fixed shaft; the rotating shaft is rotatably engaged with the bushing; the guide plate is embedded in the countersunk hole and is rotatably engaged; the screw passes through the guide plate and is fixed to the rotating shaft; the flange is slidably engaged with the transverse base; the annular sleeve is inserted into the circular cavity and is clearance-fitted.

2. A desktop convection fan according to claim 1, characterized in that: The bottom plate of the circular cavity is provided with a circular guide rail. The horizontal base is provided with a plurality of ball bearing seats arranged in a circle, and each ball bearing seat has a ball bearing cavity with a lower opening. It also includes round ball bearings; The round balls are held inside the ball cavity and extend outwards; the round balls mate with the circular guide rail.

3. A desktop convection fan according to claim 2, characterized in that: The annular guide rail is provided with annular ball grooves with an arc-shaped cross section.

4. A desktop convection fan according to claim 2, characterized in that: The ball bearing seat is cross-shaped, including a square main cavity and four sub-cavities, and the ball bearing cavities intersect with the prismatic portion.

5. A desktop convection fan according to claim 1, characterized in that: The transverse base is provided with an annular platform with an annular rotating shaft, and the annular platform is provided with an annular cavity. It also includes wear-resistant pads; The wear-resistant pad is placed inside the annular cavity, and the flange is in sliding fit.

6. A desktop convection fan according to claim 1, characterized in that: The flange of the transmission component is provided with a pin. The top of the bearing seat is provided with a pin hole; the pin body and the pin hole are inserted into each other.

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