Adjustable angle hand-held fan

Abstract

The utility model discloses angle adjustable handheld fan, including fan handle and air supply subassembly, be equipped with the electric core subassembly of air supply subassembly's conveyance electric energy in fan handle, is fixed with rotating arm on air supply subassembly, is equipped with the swing groove on fan handle, and rotating arm inserts swing groove and is rotatablely connected with fan handle through the peg, is equipped with the elastic limit component of radially telescopic still on rotating arm, is equipped with a plurality of gear grooves that are arranged in arc interval and are uniformly distributed around the axis of peg on the lateral wall of swing groove, after the relative rotation of air supply subassembly and fan handle, the elastic limit component embeds one gear groove and forms the limit cooperation. Adjust the outflow angle through the direct rotation air supply subassembly, and when the elastic limit component rotates to the position opposite gear groove, can be automatically inserted into the gear groove and realize the brake through the elastic force effect, and the outflow angle adjustment process is convenient, and has a plurality of angle adjustment gear selection, can effectively improve the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of fan equipment technology, and in particular to an adjustable angle handheld fan. Background Technology

[0002] Handheld fans, neck fans, and clip-on fans are all common portable fans, characterized by their small size and light weight, making them convenient for outdoor use. Handheld fans are primarily operated by the user's hand, and the airflow direction can be changed by the user's hand movements; however, if a handheld fan is placed on a table or similar surface, its airflow direction is fixed and cannot be adjusted.

[0003] Chinese utility model patent document CN221990619U discloses a handheld fan with up-and-down swing and heat dissipation. The technical solution includes a fan barrel and a handle. A connecting arm is rotatably mounted on the top of the handle and can be adjusted up and down relative to the handle. The connecting arm is rotatably connected to a connecting seat fixed to the top of the handle via a damping shaft. This utility model patent's technical solution achieves relative rotation between the fan barrel and the handle through the cooperation of the damping shaft and the connecting seat. Although the airflow direction can be adjusted by swinging the fan barrel up and down, the damping shaft relies on the friction of friction plates to achieve fixation after rotation. Therefore, long-term use will lead to irreversible wear, affecting its service life. Furthermore, the damping shaft must withstand both bending moment and torque during rotation, requiring a relatively large force to adjust the airflow direction, which may affect the user experience. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an adjustable angle handheld fan that can easily adjust the airflow angle.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an adjustable angle handheld fan, including a fan handle and an air supply component. The fan handle is provided with a battery cell component that supplies power to the air supply component. A rotating arm is fixed on the air supply component. The fan handle is provided with a swing groove. The rotating arm is inserted into the swing groove and rotatably connected to the fan handle through a pin. The rotating arm is also provided with a radially retractable elastic limiting component. The side wall of the swing groove is provided with multiple evenly spaced stop grooves arranged in an arc around the axis of the pin. After the air supply component and the fan handle rotate relative to each other, the elastic limiting component is embedded in one of the stop grooves to form a limiting fit. This invention utilizes a rotating arm that interlocks with a swing groove, while simultaneously using a pin to rotatably connect the rotating arm within the swing groove. The angle of the entire air delivery assembly can be adjusted by controlling the rotation of the rotating arm around the pin. Furthermore, this invention incorporates an elastic limiting component that engages with multiple gear slots. During the rotation of the rotating arm, the elastic limiting component is compressed. When the rotating arm aligns with the gear slot, the elastic limiting component pops out and extends into the gear slot, forming a limiting engagement and thus braking the rotating arm. The engagement of the elastic limiting component with different gear slots achieves fixation at different rotation angles. Braking of the rotating arm is achieved with a relatively small elastic force, and all rotation-related structures are hidden within the swing groove, resulting in a compact overall structure that promotes the miniaturization of handheld fans.

[0006] As a further improvement to the above solution: the elastic limiting component includes a bushing, a compression spring, and a positioning bead; the limiting bushing is fixed on the rotating arm and extends radially along the rotating arm, with an axial mounting hole provided inside the limiting bushing; the compression spring is coaxially disposed within the mounting hole of the limiting bushing; the positioning bead abuts against the compression spring, with a portion of the positioning bead extending out of the mounting hole. This invention achieves the elastic extension and contraction of the elastic limiting component by using a positioning bead in conjunction with a compression spring. During the rotation of the rotating arm, the positioning bead is pressed into the bushing, compressing the compression spring. When the rotating arm rotates to the point where the positioning bead aligns with the gear slot, the positioning bead is embedded in the gear slot, and the rebound force of the compression spring presses the positioning bead firmly into the gear slot, thus braking the rotating arm. Because the elastic limiting component of this invention uses a positioning bead, a rolling fit is formed between the elastic limiting component and the inner wall of the swing groove, effectively reducing friction between them and reducing the force required to rotate the rotating arm. The rotation of the rotating arm is smoother, providing a better user experience.

[0007] As a further improvement to the above solution, the gear slot is an arc-shaped groove adapted to the positioning bead. By limiting the shape of the gear slot, this utility model uses an arc-shaped groove to make the process of the positioning bead rolling into or out of the gear slot smoother, which can further reduce the resistance encountered by the rotating arm during rotation, thereby further improving the user experience.

[0008] As a further improvement to the above solution: the inner surface of the orifice at the end of the mounting hole that mates with the positioning bead is an arc surface, and the maximum diameter of the orifice is smaller than the diameter of the positioning bead. This invention, by limiting the orifice structure of the mounting hole in the bushing, improves the fit between the positioning bead and the mounting hole, thereby reducing the impact on the rolling of the positioning bead; furthermore, limiting the orifice diameter of the mounting hole to be smaller than the diameter of the positioning bead effectively prevents the positioning bead from falling out of the mounting hole.

[0009] As a further improvement to the above solution: the air supply assembly further includes a fan housing, a tunnel fan assembly, a front cover for the air inlet screen, an air inlet screen, a rear cover for the air inlet screen, and an air outlet screen; the fan housing has a cylindrical structure, and the tunnel fan assembly is fixedly installed inside the fan housing. One end of the fan housing is detachably connected to the rear cover for the air inlet screen, the air inlet screen, and the front cover for the air inlet screen in sequence, and the other end of the fan housing is detachably connected to the air outlet screen. The cylindrical air supply assembly used in this invention, in conjunction with the tunnel fan assembly, effectively reduces air diffusion, making the air supply more concentrated, thereby achieving a longer air supply distance and a more efficient air supply effect.

[0010] As a further improvement to the above solution: the tunnel ventilation fan assembly consists of a circuit board, a mounting part, an iron core coil, and a fan blade; the circuit board and the iron core coil are fixed on the mounting part, the iron core coil and the circuit board are electrically connected to the battery cell assembly in the fan handle, a magnet is sleeved on the fan blade shaft and inserted into the iron core coil, and the fan blade shaft is rotatably connected to the mounting part.

[0011] As a further improvement to the above solution, a vibration damping layer is provided between the tunnel ventilation fan assembly and the fan housing. This invention reduces the operating vibration of the tunnel ventilation fan assembly by providing a vibration damping layer, thereby ensuring the stable operation of the tunnel ventilation fan assembly.

[0012] As a further improvement to the above solution, the damping layer is wrapped and fixed to the outer surface of the mounting part. This invention, by increasing the effective area of ​​the damping layer and ensuring its direct contact with the vibrating components, effectively improves the damping effect on tunnel ventilation fan components.

[0013] As a further improvement to the above solution: the damping layer is a rubber layer, a sponge layer, or a foam layer.

[0014] As a further improvement to the above solution: the fan handle also includes a battery casing, a control board and a tail cover; the battery cell assembly and the control board are fixedly installed inside the battery casing, a rotating arm seat is detachably connected to the top of the battery casing, a swing groove is installed on the rotating arm seat, and the tail cover is detachably connected to the bottom of the battery casing.

[0015] The beneficial effects of this utility model are as follows: This utility model improves the connection structure between the fan handle and the air supply component in a handheld fan. A rotating arm fixed on the air supply component is inserted into a swing groove on the fan handle, and a pin is used to rotatably connect the rotating arm to the fan handle. The rotation of the rotating arm in the swing groove enables the air supply component to swing, and the rotation of the rotating arm is stopped by the limiting cooperation between the elastic limiting component and the gear slot. This utility model allows for adjustment of the air outlet angle by directly rotating the air supply component. Furthermore, when the elastic limiting component rotates to a position opposite to the gear slot, it automatically extends into the gear slot through elastic force to achieve braking. The air outlet angle adjustment process is convenient, and it offers multiple angle adjustment gears, effectively improving the user experience. Attached Figure Description

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

[0017] Figure 2 This is an exploded view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the top structure of the fan handle;

[0019] Figure 4 This is a structural cross-sectional view of the elastic limiting component;

[0020] Figure 5 This is a cross-sectional view of the air supply assembly.

[0021] Figure 6 This is a structural cross-sectional view of the tunnel ventilation fan assembly.

[0022] The components in the diagram are labeled as follows: 100-Fan handle, 110-Battery cell assembly, 120-Swing slot, 130-Gear slot, 140-Battery casing, 150-Control board, 160-Tail cover, 170-Rotating arm seat, 200-Air supply assembly, 210-Rotating arm, 220-Pin, 230-Elastic limit assembly, 231-Shaft sleeve, 232-Compression spring, 233-Positioning bead, 240-Fan casing, 250-Tunnel fan assembly, 251-Circuit board, 252-Mounting part, 253-Iron core coil, 254-Fan blade, 261-Front cover of air inlet mesh, 262-Air inlet mesh, 263-Rear cover of air inlet mesh, 264-Air outlet mesh, 270-Shock-absorbing layer. Detailed Implementation

[0023] To facilitate understanding of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0024] In the description of this utility model, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", etc., 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 description and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figure 1 and Figure 2 As shown, the adjustable angle handheld fan disclosed in this utility model consists of a fan handle 100 and an air delivery assembly 200. The fan handle 100 serves as the base and handheld part of the entire handheld fan, and the user can use it by holding the fan handle 100 or place the fan handle 100 on a table. A battery cell assembly 110 is provided inside the fan handle 100, which provides electrical energy to the air delivery assembly 200 so that the air delivery assembly 200 generates and delivers wind force outward.

[0026] This invention achieves adjustment of the air outlet angle of the air supply assembly 200 by providing a swing groove 120 on the fan handle 100 and a rotating arm 210 on the air supply assembly 200. Specifically, as shown... Figure 2 As shown, the rotating arm 210 is fixedly connected to the bottom of the air supply assembly 200. The swing groove 120 is located at the top of the fan handle 100. The rotating arm 210 is inserted into the swing groove 120, and a pin 220 is fixedly mounted on the rotating arm 210. The pin 220 is perpendicular to the axial direction of the rotating arm 210. A rotating hole corresponding to the pin 220 is provided in the swing groove 120 for the pin 220 to be inserted. After assembly, the rotating arm 210 can rotate around the pin 220, thereby adjusting the air outlet angle of the air supply assembly 200 by rotating the rotating arm 210. After adjusting the air outlet angle of the air supply assembly 200, this invention can also fix the air outlet angle of the air supply assembly 200 by braking the rotating arm 210. Figure 2 and Figure 3As shown, multiple gear slots 130 are provided on the inner wall of the swing groove 120. The gear slots 130 are evenly distributed in an arc shape around the outer periphery of the rotating hole, with the axis of the pin 220 as the reference. At the same time, an elastic limiting component 230 that cooperates with the gear slots 130 is fixedly installed on the rotating arm 210. The elastic limiting component 230 can extend and retract in the radial direction perpendicular to the axis of the rotating arm 210. During the rotation of the rotating arm 210, the elastic limiting component 230 retracts radially under the obstruction of the inner wall of the swing groove 120. When the rotating arm 210 rotates to align the elastic limiting component 230 with the gear slot 130, the elastic limiting component 230 extends radially into the gear slot 130 because it is no longer obstructed by the inner wall of the swing groove 120. The elastic limiting component 230 is embedded in the gear slot 130 and forms a limiting cooperation with the gear slot 130 to brake the rotation of the rotating arm 210, thereby fixing the air supply component 200. Because this utility model is equipped with multiple gear slots 130 and the arrangement of the gear slots 130 is limited, the gear slots 130 are evenly distributed on the rotation path of the elastic limiting component 230, so that the swing angle of the air supply component 200 can have different gears. Users can rotate the rotating arm 210 to the corresponding gear according to their usage needs, bringing a better user experience.

[0027] Specifically, such as Figure 4 As shown, the elastic limiting component 230 used in this utility model consists of a bushing 231, a compression spring 232, and a positioning bead 233. The bushing 231 is a cylindrical sleeve with an internal coaxial mounting hole. The bushing 231 is arranged radially along the rotating arm 210 and fixedly connected to the rotating arm 210. The compression spring 232 is coaxially disposed within the mounting hole of the bushing 231, and the positioning bead 233 is disposed within the mounting hole of the bushing 231. One end of the compression spring 232 abuts against the inner side of the end of the bushing 231, and the other end abuts against the positioning bead 233. When the compression spring 232 is in an uncompressed state, the positioning bead 233 is pushed out of the mounting hole by the compression spring 232, causing part of the positioning bead 233 to protrude outside the bushing 231. During the rotation of the rotating arm 210, the positioning bead 233 is pushed back into the mounting hole by the inner wall of the swing groove 120, and the compression spring 232 is compressed. During this process, the positioning bead 233 can form a rolling fit with the inner wall of the swing groove 120, thereby reducing the friction between the inner wall of the swing groove 120 and the elastic limiting component 230. When the rotating arm 210 rotates to align the elastic limiting component 230 with the gear groove 130, the positioning bead 233 rolls into the gear groove 130, thereby reducing the pressure. The compression spring 232 recovers its deformation and extends, providing axial pressure to press the positioning bead 233 into the gear groove 130, thereby braking the rotating arm 210. If no force is applied to the rotating arm 210 at this time, the rotating arm 210 remains fixed, thereby keeping the air outlet angle of the air supply component 200 fixed.

[0028] Furthermore, this utility model sets the gear slot 130 as an arc groove that matches the positioning bead 233, so that the mating surface between the gear slot 130 and the positioning bead 233 is an arc surface. The resistance encountered by the positioning bead 233 when it rolls into or out of the gear slot 130 is significantly reduced, making the action of adjusting the air outlet angle of the air supply assembly 200 smoother.

[0029] Furthermore, this invention sets the inner surface of the hole on the bushing 231 that mates with the positioning bead 233 as an arc surface, and limits the maximum diameter of the hole to be smaller than the diameter of the positioning bead 233. Through these structural limitations, the mating surface between the positioning hole and the positioning bead 233 is also arc-shaped, allowing the positioning bead 233 to roll more smoothly in the mounting hole. Additionally, it can also block and limit the positioning bead 233 to prevent it from detaching from the mounting hole.

[0030] Specifically, such as Figure 2 and Figure 5 As shown, the air supply assembly 200 used in this utility model, excluding the rotating arm 210, also includes a fan housing 240, a tunnel fan assembly 250, a front cover 261 for the air inlet screen, an air inlet screen 262, a rear cover 263 for the air inlet screen, and an air outlet screen 264. The fan housing 240 adopts a cylindrical structure, and the tunnel fan assembly 250 is fixedly installed in the fan housing 240. One end of the fan housing 240 is the air inlet end, and the other end is the air outlet end. One end of the fan housing 240 is detachably connected to the rear cover 263 for the air inlet screen, the air inlet screen 262, and the front cover 261 for the air inlet screen in sequence by means of fasteners or snap-fit ​​connections. The front cover 261 and the rear cover 263 for the air inlet screen clamp and fix the air inlet screen 262 from the front and rear sides, respectively. The other end of the fan housing 240 is detachably connected to the air outlet screen 264 by means of fasteners or snap-fit ​​connections.

[0031] Specifically, such as Figure 6 As shown, the tunnel ventilation fan assembly 250 used in this invention consists of a circuit board 251, a mounting part 252, an iron core coil 253, and a fan blade 254. The circuit board 251 and the iron core coil 253 are fixed on the mounting part 252. The iron core coil 253 is formed by winding a coil around an iron core. The iron core coil 253 and the circuit board 251 are electrically connected to the battery assembly 110 inside the fan handle 100 via wires. A magnet is fitted onto the fan blade shaft 255 of the fan blade 254 and inserted into the iron core coil 253. The fan blade shaft 255 of the fan blade 254 is rotatably connected to the mounting part 252 via a rotating bearing. In this invention, the battery assembly 110 supplies power to the coil of the iron core coil 253 through the circuit board 251, driving the fan blade 254 to rotate through the principle of electromagnetic induction.

[0032] Furthermore, such as Figure 5 and Figure 6 As shown, this invention provides a vibration damping layer 270 between the tunnel ventilation fan assembly 250 and the fan housing 240 to reduce the vibration generated by the tunnel ventilation fan assembly 250 during operation. To improve the vibration damping effect, the vibration damping layer 270 can be wrapped and fixed to the outer surface of the mounting part 252. The vibration damping layer 270 can be made of rubber, sponge, or foam, with rubber being the preferred option.

[0033] Specifically, such as Figure 1 and Figure 2 As shown, the fan handle 100 used in this utility model consists of a battery cell assembly 110, a battery casing 140, a control board 150, a tail cover 160, and a rotating arm base 170. The battery casing 140 is arranged perpendicular to the axis of the air supply assembly 200. The battery cell assembly 110 and the control board 150 are installed and fixed inside the battery casing 140. The rotating arm base 170 and the tail cover 160 are detachably connected to the top and bottom of the battery casing 140, respectively. The rotating arm base 170 serves as the base for the swing arm 120. The rotating arm base 170 seals the top of the battery casing 140, and the tail cover 160 seals the bottom of the battery casing 140. By removing the tail cover 160, the bottom of the battery casing 140 can be opened for internal component inspection or replacement of the battery cell assembly 110. Since the rotating arm base 170 is normally fixed on the top of the battery casing 140, it is not necessary to disassemble the rotating arm base 170 during normal use. Therefore, the rotating arm base 170 can be connected and fixed to the battery casing 140 with fasteners to improve the connection strength. The tail cover 160 can be connected to the battery casing 140 through a snap-fit ​​structure, so that the tail cover 160 can be removed at any time to clean or inspect the inside of the fan handle 100.

Claims

1. An adjustable-angle handheld fan, comprising a fan handle (100) and an air delivery assembly (200), wherein the fan handle (100) contains a battery cell assembly (110) for supplying electrical energy to the air delivery assembly (200), characterized in that: A rotating arm (210) is fixed on the air supply assembly (200), and a swing groove (120) is provided on the fan handle (100). The rotating arm (210) is inserted into the swing groove (120) and rotatably connected to the fan handle (100) through a pin (220). The rotating arm (210) is also provided with a radially extendable elastic limiting assembly (230). Multiple gear slots (130) are provided on the side wall of the swing groove (120) and are evenly distributed in an arc around the axis of the pin (220). After the air supply assembly (200) and the fan handle (100) rotate relative to each other, the elastic limiting assembly (230) is embedded in one of the gear slots (130) to form a limiting fit.

2. The adjustable-angle handheld fan as described in claim 1, characterized in that: The elastic limiting component (230) includes a bushing (231), a compression spring (232), and a positioning bead (233). The limiting bushing (231) is fixed on the rotating arm (210) and extends radially along the rotating arm (210). An axial mounting hole is provided inside the limiting bushing (231). The compression spring (232) is coaxially disposed in the mounting hole of the limiting bushing (231). The positioning bead (233) abuts against the compression spring (232) and part of the positioning bead (233) extends out of the mounting hole.

3. The adjustable-angle handheld fan as described in claim 2, characterized in that: The gear slot (130) is an arc groove that is adapted to the positioning bead (233).

4. The adjustable-angle handheld fan as described in claim 2, characterized in that: The inner surface of the mounting hole that mates with the positioning bead (233) is an arc surface, and the maximum diameter of the hole is smaller than the diameter of the positioning bead (233).

5. The adjustable-angle handheld fan as described in claim 1, characterized in that: The air supply assembly (200) also includes a fan housing (240), a tunnel fan assembly (250), a front cover (261) of the air inlet net, an air inlet net (262), a rear cover (263) of the air inlet net, and an air outlet net (264). The fan housing (240) is a cylindrical structure, and the tunnel fan assembly (250) is fixedly installed in the fan housing (240). One end of the fan housing (240) is detachably connected to the rear cover (263), the air inlet net (262), and the front cover (261) of the air inlet net in sequence, and the other end of the fan housing (240) is detachably connected to the air outlet net (264).

6. The adjustable-angle handheld fan as described in claim 5, characterized in that: The tunnel ventilation fan assembly (250) consists of a circuit board (251), a mounting part (252), an iron core coil (253), and a fan blade (254). The circuit board (251) and the iron core coil (253) are fixed on the mounting part (252). The iron core coil (253) and the circuit board (251) are electrically connected to the battery cell assembly (110) in the fan handle (100). A magnet is fitted on the fan blade shaft (255) of the fan blade (254) and inserted into the iron core coil (253). The fan blade shaft (255) of the fan blade (254) is rotatably connected to the mounting part (252).

7. The adjustable-angle handheld fan as described in claim 6, characterized in that: A shock-absorbing layer (270) is provided between the tunnel ventilation fan assembly (250) and the fan casing (240).

8. The adjustable-angle handheld fan as described in claim 7, characterized in that: The damping layer (270) is wrapped and fixed on the outer surface of the mounting part (252).

9. The adjustable-angle handheld fan as described in claim 7, characterized in that: The shock-absorbing layer (270) is a rubber layer, a sponge layer, or a foam layer.

10. The adjustable-angle handheld fan as described in claim 1, characterized in that: The fan handle (100) also includes a battery housing (140), a control board (150), and a tail cover (160); the battery cell assembly (110) and the control board (150) are fixedly installed inside the battery housing (140), a rotating arm seat (170) is detachably connected to the top of the battery housing (140), a swing groove (120) is installed on the rotating arm seat (170), and the tail cover (160) is detachably connected to the bottom of the battery housing (140).

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