Swing structure of fan

Abstract

The utility model discloses a swing head structure of fan, including up and down swing head subassembly, left and right swing head subassembly and support subassembly, up and down swing head subassembly includes first support and damping pivot, the damping pivot is used to provide damping force to keep the up and down angle of elevation of fan head, left and right swing head subassembly includes second support, drive part, transmission mechanism and angle adjusting part, transmission mechanism is connected in drive part's output, angle adjusting part is fixed in transmission mechanism's output, and angle adjusting part is equipped with a plurality of circumferential distribution's limit portion, support subassembly includes support seat and the elastic positioning part of containing in it. The utility model technical scheme aims at providing a two -way swing head structure with high stability.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a fan oscillation structure. Background Technology

[0002] As a common air conditioning appliance, the oscillation function of a fan is a key design feature that enhances the user experience. By changing the airflow angle, the airflow range can be expanded to meet cooling needs in different scenarios. Currently, the oscillation structure of fans on the market is mainly divided into two categories: single-direction oscillation and bidirectional oscillation.

[0003] Fans with unidirectional oscillation (such as those that only oscillate left and right or only oscillate up and down) have significant limitations: fans that only oscillate left and right cannot adjust the vertical airflow angle, making it difficult to meet the airflow needs at different heights; fans that only oscillate up and down cannot expand the horizontal airflow range, requiring manual adjustment of the fan position to cover different areas, which is cumbersome. To solve these problems, some manufacturers have developed fans with bidirectional oscillation functionality, but existing bidirectional oscillation structures lack a stable angle-maintaining mechanism. After adjustment, the angle is easily shifted due to fan vibration or its own weight, requiring frequent manual reset, which affects the user experience. Utility Model Content

[0004] The main objective of this invention is to provide a fan oscillation structure, specifically a bidirectional oscillation structure with high stability.

[0005] To achieve the above objectives, the oscillating head structure of the fan proposed in this utility model includes:

[0006] The up-and-down tilting head assembly includes a first bracket and a damping shaft, the damping shaft being used to provide damping force to maintain the up-and-down tilt angle of the fan head;

[0007] The left and right tilting head assembly includes a second bracket, a driving component, a transmission mechanism, and an angle adjusting component. The transmission mechanism is connected to the output end of the driving component, and the angle adjusting component is fixed to the output end of the transmission mechanism. The angle adjusting component has multiple circumferentially distributed limiting portions.

[0008] Support assembly, including a support base and a resilient positioning element housed therein;

[0009] The first bracket is connected to the upper part of the second bracket via the damping shaft to enable the fan head to swing up and down. The lower part of the second bracket is rotatably connected to the support base via an angle adjustment member. The driving member drives the angle adjustment member to rotate relative to the support base via the transmission mechanism to enable the fan head to swing left and right. The elastic positioning member can engage with any of the limiting parts to limit the rotation angle.

[0010] In one possible implementation, the transmission mechanism includes a crank and a swing arm, one end of the crank being fixedly connected to the output end of the drive member, and the other end being hinged to one end of the swing arm, the other end of which is fixedly connected to an angle adjustment member.

[0011] In one possible implementation, the limiting portion is a limiting hole through the angle adjustment member, and the elastic positioning member can be partially embedded in the limiting hole.

[0012] In one possible implementation, the elastic positioning element includes a positioning bead and a spring, one end of the spring abutting against the support seat and the other end connected to the positioning bead, the positioning bead engaging with the limiting portion under the elastic force of the spring.

[0013] In one possible implementation, the driving element is a synchronous motor, which is fixed to the second bracket.

[0014] This utility model's technical solution achieves stepless adjustment and reliable positioning of the fan head's vertical tilt angle by employing a vertical oscillating head assembly with a damping shaft, solving the stability problem of traditional fans easily loosening and sagging due to their own weight after vertical adjustment. By using a four-bar linkage transmission mechanism consisting of a synchronous motor drive, crank, and swing rod, it achieves smooth left and right oscillation and precise transmission, overcoming the technical defects of traditional gear transmissions such as high noise, easy wear, and motion stagnation. Simultaneously, by setting multiple sets of circumferentially distributed limiting holes on the angle adjustment component and engaging with the elastic positioning component in the support base, it achieves reliable limiting and clear feedback for multiple preset oscillation angles, effectively solving the practicality problem of existing fans having a single left and right oscillation angle and being unable to meet diverse air delivery needs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a bottom view schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 3 This is an exploded view of the structure of an embodiment of the present invention.

[0019] Explanation of icon numbers:

[0020] 1. Up and down swing head assembly; 11. First bracket; 12. Damping shaft; 2. Left and right swing head assembly; 21. Second bracket; 22. Drive component; 23. Transmission mechanism; 231. Crank; 232. Swing rod; 24. Angle adjustment component; 241. Limiting part; 3. Support assembly; 31. Support base; 32. Elastic positioning component; 321. Positioning bead; 322. Spring.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] To address the problems in the background technology, this utility model proposes a fan oscillation head structure, comprising:

[0024] The up-and-down tilting head assembly 1 includes a first bracket 11 and a damping shaft 12, wherein the damping shaft 12 is used to provide damping force to maintain the up-and-down tilt angle of the fan head;

[0025] The left and right tilting head assembly 2 includes a second bracket 21, a driving component 22, a transmission mechanism 23, and an angle adjusting component 24. The transmission mechanism 23 is connected to the output end of the driving component 22, and the angle adjusting component 24 is fixed to the output end of the transmission mechanism 23. The angle adjusting component 24 is provided with multiple circumferentially distributed limiting portions 241.

[0026] The support assembly 3 includes a support base 31 and an elastic positioning member 32 housed therein;

[0027] The first bracket 11 is connected to the upper part of the second bracket 21 via the damping shaft 12 to realize the up-and-down oscillation of the fan head. The lower part of the second bracket 21 is rotatably connected to the support base 31 via the angle adjustment member 24. The driving member 22 drives the angle adjustment member 24 to rotate relative to the support base 31 via the transmission mechanism 23 to realize the left-and-right oscillation. The elastic positioning member 32 can engage with any of the limiting parts 241 to limit the rotation angle.

[0028] Combined with reference Figures 1 to 3 As shown, in this embodiment, a head-swinging structure is provided that can achieve stable manual up-and-down adjustment and precise automatic left-and-right head swinging. The structure is mainly composed of an up-and-down head-swinging component 1, a left-and-right head-swinging component 2, and a support component 3.

[0029] The up-and-down tilting assembly 1 is the core component for manually adjusting the pitch angle of the fan head. It mainly includes a first bracket 11 for mounting the fan head and a damping shaft 12. The damping shaft 12 typically contains a special friction material or pre-tightening structure to provide appropriate rotational damping force. When the user manually tilts the fan head up and down, the damping shaft 12 allows for smooth rotation; once the desired angle is reached, the damping force is sufficient to overcome the fan head's own weight and vibration, stably maintaining it at the set pitch angle, thus achieving stepless adjustment and reliable positioning of the up-and-down tilt angle. In addition to connecting the damping shaft 12, the first bracket 11 also integrates the power structure that drives the fan body. Specifically, one side of the first bracket 11 has a mounting cavity, within which a fan drive motor (which can be an AC motor, a DC brushless motor, or other compatible drive unit 22) is fixed. The output end of this motor extends horizontally and is connected to the drive shaft. The end of the drive shaft away from the motor passes through the side wall of the first bracket 11 and is fixedly connected to the fan blade assembly at the fan head. A bearing structure is provided at the point where the drive shaft passes through the first bracket 11 to reduce frictional resistance during rotation. When the fan needs to run and deliver air, the fan drive motor is powered on and its output torque is transmitted to the fan blade assembly through the drive shaft, causing the fan blades to rotate at high speed and generate airflow. When adjusting the up and down oscillation, the first bracket 11 rotates around the damping shaft 12. At this time, the fan drive motor, drive shaft, and fan blade assembly deflect synchronously with the first bracket 11 to achieve up and down adjustment of the air delivery angle. During this process, the rotation of the drive shaft and the oscillation action of the first bracket 11 are independent of each other and do not interfere with each other.

[0030] The left and right oscillating assembly 2 is responsible for driving the fan head to automatically oscillate horizontally. This assembly includes a second bracket 21 that supports the overall structure, a drive component 22 that provides power (usually a low-speed synchronous motor, but a combination of a stepper motor, DC motor, and reduction gearbox can also be used), a transmission mechanism 23 that converts the rotational motion of the drive component 22 into a specific trajectory motion (preferably a four-bar linkage consisting of a crank 231 and an oscillating rod 232, but a gear transmission mechanism 23 or a belt / synchronous belt transmission mechanism 23 can also be used), and an angle adjustment component 24 fixedly installed at the output end of the transmission mechanism 23. The angle adjustment component 24 is designed as a disc, a fan, or other structure suitable for rotation, and has multiple uniformly or non-uniformly distributed limiting parts 241 machined in its circumferential direction. These limiting parts 241 can be in different shapes such as pits, through holes, protrusions, or grooves.

[0031] The support assembly 3 includes a support base 31 and an elastic positioning element 32. The support base 31 serves as the basic support for the entire swing head structure and has an internal mounting groove in which the elastic positioning element 32 is housed. The elastic positioning element 32 consists of a positioning bead 321 and a spring 322. One end of the spring 322 abuts against the bottom of the mounting groove, and the other end is connected to the positioning bead 321. Under the preload of the spring 322, the positioning bead 321 always tends to move towards the angle adjustment element 24 and can engage with any limiting part 241 on the angle adjustment element 24. Other equivalent structures can also be used. For example, the positioning element can be a wedge-shaped block or pin pushed by the spring 322, which engages with a correspondingly shaped limiting groove or limiting hole on the angle adjustment element 24.

[0032] In terms of overall assembly, the upper and lower oscillating head assembly 1 is connected to the upper part of the bracket of the left and right oscillating head assembly 2 via its damping pivot 12, allowing the fan head to tilt up and down around the pivot axis. The lower part of the left and right oscillating head assembly 2 is rotatably connected to the support base 31 of the support assembly 3 via its angle adjustment member 24; specifically, the angle adjustment member 24 can rotate relative to the support base 31 around a vertical axis. The driving member 22, through the transmission mechanism 23, ultimately drives the angle adjustment member 24, along with the connected bracket, the upper and lower oscillating head assembly 1, and the fan head, to oscillate left and right relative to the fixed support base 31. When the driving member 22 drives the fan head to oscillate left and right, the positioning components (such as beads, pins, and spring arm protrusions) on the elastic positioning member 32, under the action of elastic force, will slide across their surface as the angle adjustment member 24 rotates. When the fan head swings to a preset angle, that is, when a certain limiting part 241 rotates to the position corresponding to the elastic positioning member 32, the positioning member will engage or embed itself into the limiting part 241 under the action of elastic force, generating a clear positioning feeling and forming a mechanical limit. By setting limiting parts 241 at different circumferential positions, users can choose to make the fan head swing automatically within different preset angle ranges (e.g., 90 degrees, 120 degrees, etc.), or stop airflow at a specific angle, thereby meeting diverse usage scenario needs.

[0033] In one possible implementation, the transmission mechanism 23 includes a crank 231 and a swing rod 232. One end of the crank 231 is fixedly connected to the output end of the drive member 22, and the other end is hinged to one end of the swing rod 232. The other end of the swing rod 232 is fixedly connected to the angle adjustment member 24.

[0034] Combined with reference Figure 2 and Figure 3As shown, in this embodiment, the transmission mechanism 23 mainly consists of a crank 231 and a swing arm 232. One end of the crank 231 is fixedly connected to the output shaft of the drive member 22, thereby directly converting the rotational motion of the drive member 22 into the circular motion of the crank 231. The other end of the crank 231 is rotatably hinged to one end of the swing arm 232 via a hinge shaft. The other end of the swing arm 232 is fixedly connected to the angle adjustment member 24, ultimately converting the circular motion of the crank 231 into the reciprocating oscillation of the angle adjustment member 24 within a certain angle range. This transmission scheme essentially constitutes a simplified and efficient four-bar linkage. When the drive member 22 is started, it drives the crank 231 to perform circular motion. The crank 231 pushes the swing arm 232 through the hinge point. The swing arm 232, as the final link in power transmission, drives the angle adjustment member 24 and the fan head connected to it to achieve smooth left-right reciprocating oscillation. This structure effectively solves the technical problems that may exist in traditional gear transmission, such as high noise and rapid wear, or in simple swing mechanisms, such as dead point position and unstable movement.

[0035] In one possible implementation, the limiting part 241 is a limiting hole that passes through the angle adjusting member 24, and the elastic positioning member 32 can be partially embedded in the limiting hole.

[0036] In one possible implementation, the elastic positioning member 32 includes a positioning bead 321 and a spring 322. One end of the spring 322 abuts against the support base 31, and the other end is connected to the positioning bead 321. The positioning bead 321 engages with the limiting part 241 under the elastic force of the spring 322.

[0037] Combined with reference Figures 1 to 3As shown, in this embodiment, the limiting part 241 provided on the angle adjusting member 24 is a limiting hole penetrating its body, and multiple limiting holes are evenly or unevenly distributed along the circumference of the angle adjusting member 24. Correspondingly, the elastic positioning member 32 is composed of a positioning bead 321 and a spring 322. Under the continuous pre-pressure of the spring 322, part of the spherical surface of the positioning bead 321 can extend outward from the inside of the support base 31. When the driving member 22 drives the angle adjusting member 24 to rotate through the transmission mechanism 23, the spherical surface of the positioning bead 321 slides along the surface of the angle adjusting member 24. When any limiting hole rotates to the position corresponding to the elastic positioning member 32, the front end of the positioning bead 321 will instantly embed into the limiting hole under the pressure of the spring 322. This embedding action produces a clear "click" sound and a distinct tactile feel, while effectively limiting the continued rotation of the angle adjusting member 24 through mechanical interference, thereby achieving positioning at a preset swing angle. Furthermore, the inner wall of the mounting groove is provided with axially extending guide ribs, and the outer wall of the positioning bead 321 is provided with a corresponding guide groove. Through the cooperation of the guide ribs and the guide groove, the positioning bead 321 can be prevented from circumferentially shifting during movement, ensuring precise engagement with the limiting part 241.

[0038] In one possible implementation, the drive element 22 is a synchronous motor, which is fixed to the second bracket 21. Specifically, a synchronous motor is selected as the specific implementation of the drive element 22. The synchronous motor is reliably installed in a designated position on the second bracket 21 by means of screw connection or snap-fit ​​fixing, and its output shaft is directly connected to the crank 231 in the transmission mechanism 23. This low-speed, high-torque synchronous motor is particularly suitable for the operating conditions of fan oscillation heads that require continuous and smooth reciprocating motion.

[0039] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fan oscillation head structure, characterized in that, include: The up-and-down tilting head assembly includes a first bracket and a damping shaft, the damping shaft being used to provide damping force to maintain the up-and-down tilt angle of the fan head; The left and right head swing assembly includes a second bracket, a drive component, a transmission mechanism, and an angle adjustment component. The transmission mechanism is connected to the output end of the drive component, the angle adjustment component is fixed to the output end of the transmission mechanism, and the angle adjustment component is provided with multiple circumferentially distributed limiting parts. and Support assembly, including a support base and a resilient positioning element housed therein; The first bracket is connected to the upper part of the second bracket via the damping shaft to enable the fan head to swing up and down. The lower part of the second bracket is rotatably connected to the support base via an angle adjustment member. The driving member drives the angle adjustment member to rotate relative to the support base via the transmission mechanism to enable the fan head to swing left and right. The elastic positioning member can engage with any of the limiting parts to limit the rotation angle.

2. The oscillating head structure of the fan according to claim 1, characterized in that, The transmission mechanism includes a crank and a swing rod. One end of the crank is fixedly connected to the output end of the drive component, and the other end is hinged to one end of the swing rod. The other end of the swing rod is fixedly connected to an angle adjustment component.

3. The oscillating head structure of the fan according to claim 1, characterized in that, The limiting part is a limiting hole that penetrates the angle adjustment member, and the elastic positioning member can be partially embedded in the limiting hole.

4. The oscillating head structure of the fan according to claim 3, characterized in that, The elastic positioning element includes a positioning bead and a spring. One end of the spring abuts against the support base, and the other end is connected to the positioning bead. The positioning bead engages with the limiting part under the elastic force of the spring.

5. The oscillating head structure of the fan according to claim 1, characterized in that, The driving component is a synchronous motor, which is fixed to the second bracket.

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