A hand-held fan

Abstract

The utility model discloses a handheld fan, including handheld part and head, the handheld part is close to the one end of head and is equipped with the movable slot, the movable slot is hinged with a neck, the neck is extended to the direction close to head and is fixedly connected with head, the head includes the air duct casing and the air supply module of being located in the air duct casing, the air duct casing is equipped with the air collecting ring coaxial with air supply module, the inner circle surface of air duct casing and the outer circle surface between air collecting ring form the air duct, the air collecting ring makes the air duct cross section area in the air duct casing gradually reduce from the air inlet direction to the air outlet direction, the air collecting ring is located the air outlet direction of air supply module and is fixed with the air duct casing through the deflector, the deflector is the bending type structure, and its bending reference line is located the middle section position of deflector along the head axis direction. The utility model has the advantages of improving user's use effect and use experience.

Description

Technical Field

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

[0002] Existing handheld fans are usually used with a docking station when placed on a table. However, once the handheld fan is plugged into the dock, the tilt angle cannot be adjusted, which means that the airflow direction of the handheld fan can only be horizontal, and the airflow angle is limited. In addition, the head of existing handheld fans is usually composed of a flat, fully open front and rear mesh, which utilizes side air intake. Moreover, the motor speed is low, resulting in insufficient air pressure, which causes the airflow to be diffused and the air delivery distance to be short. Therefore, the air blowing distance is short, resulting in poor performance and user experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, a handheld fan is provided.

[0004] This utility model is achieved using the following technical solution:

[0005] A handheld fan includes a handheld part and a head. The handheld part has a plug-in base at its end away from the head for insertion and fixation. The handheld part has a movable groove at its end near the head, and a neck is hinged within the movable groove. The neck extends towards the head and is fixedly connected to it. The head includes a duct housing and an air delivery module disposed within the duct housing. An air-gathering ring, coaxial with the air delivery module, is disposed within the duct housing. An air duct is formed between the inner circular surface of the duct housing and the outer circular surface of the air-gathering ring. The air-gathering ring causes the cross-sectional area of ​​the air duct within the duct housing to gradually decrease from the air inlet direction to the air outlet direction. The air-gathering ring is located in the air outlet direction of the air delivery module and is fixed to the duct housing via a guide plate. The guide plate has a bent structure, with its bending reference line located in the middle section of the guide plate along the head's axial direction, thus ensuring that the guide plates in the air outlet direction are all parallel structures parallel to the axial direction.

[0006] The air deflector located in the air intake direction can be either an arc-shaped structure or a planar structure.

[0007] Under the action of the air supply module, the air is blown out from back to front along the axis of the head. After being accelerated through the air duct with a gradually decreasing cross-sectional area, it forms a directional high-pressure airflow. When it flows through the guide plate, due to the wall effect, the concentrated airflow is divided into several independent parallel airflow bundles, reducing air eddies and turbulence, and reducing the discomfort of direct airflow to the user.

[0008] When a user needs to place the handheld fan on a desktop and change its airflow angle, the handheld part is inserted into the plug-in base to increase the overall base area of ​​the structure, thereby improving the overall stability and anti-tipping ability of the structure. At this time, fixing the handheld part allows the head to move the neck, and the hinge position of the neck can be used as the axis of rotation to adjust the tilt angle of the head.

[0009] Preferably, the outer surface of the wind-gathering ring is a conical surface and a circumferential surface along the air outlet direction. By changing the distance between the wind-gathering ring and the air duct shell, the cross-sectional area of ​​the air duct can be changed, thereby controlling the wind pressure and wind speed.

[0010] Preferably, the guide plate includes an axial plate and an inclined plate. The inclination direction of the inclined plate is tangent to the airflow rotation direction of the air supply module. The adjacent plane between the inclined plate and the axial plate is in the same plane as the adjacent plane of the conical surface and the circumferential surface of the air-gathering ring. This prevents airflow turbulence at that location due to misalignment between the adjacent plane between the inclined plate and the axial plate and the adjacent plane of the conical surface and the circumferential surface of the air-gathering ring, thus preventing airflow loss.

[0011] Preferably, the guide plate located in the lower vertical direction is composed of two parallel vertical plates and a V-shaped plate connected between the two vertical plates, with the tip of the V-shaped plate facing the air outlet direction of the air supply module, and the upper ends of the two vertical plates connected to the air gathering ring.

[0012] The V-shaped plate reduces the impact on airflow, thereby reducing the kinetic energy loss generated when the airflow comes into contact with the guide plate. Two vertical plates isolate the wiring channel that allows the wires to enter the wind-gathering ring from the outside of the air duct shell, facilitating wiring.

[0013] Preferably, the duct housing includes an inner shell and an outer shell that are nested together. The outer shell has a flared structure along the air outlet direction. There is a gap between the outer shell and the inner shell. The inner shell has a cylindrical structure. The inner circular surface of the inner shell is fixed to the guide plate. The outer shell includes a mesh cover part located in the air inlet direction and a fitting part sleeved on the outside of the inner shell. The axial end face of the inner shell located in the air outlet direction has a stepped surface. The axial end face of the fitting part has a retaining ring that can axially limit the inner shell.

[0014] The design incorporates a double-layered shell structure with gaps to isolate the noise generated during the operation of the duct housing, thereby reducing the impact of noise on users; and the axial restraint of the inner shell by the retaining ring ensures the stability between the duct housings.

[0015] Preferably, the axial end face of the sleeve part extends toward the axis, and the outer circular surface of the retaining ring is provided with an outwardly extending second barb part. The first barb part and the second barb part can be locked together to achieve a detachable fixed installation between the retaining ring and the sleeve part.

[0016] Preferably, the neck is formed by splicing together a first shell and a second shell in the shape of an inverted T. The first shell includes a first horizontal part and a first vertical part, and the second shell includes a second horizontal part and a second vertical part opposite to the first horizontal part and the first vertical part. The first horizontal part and the second horizontal part are combined to form a hinge shaft that is hinged to the two side walls of the movable groove. The first vertical part is fixedly connected to the outer circular surface of the outer shell, thereby making the neck a hollow structure, providing space for wiring, and facilitating the wires to pass through the neck and extend into the head.

[0017] Preferably, the second vertical part has a snap-fit ​​part at one end near the head, and the outer shell has a wiring groove for the snap-fit ​​part to pass through. After passing through the wiring groove, the snap-fit ​​part snaps into the outer shell and the inner shell.

[0018] The neck is assembled by snap-fit, which simplifies the assembly process and makes disassembly easier compared to locking the first and second housings with screws.

[0019] Preferably, the guide plate has connecting roots between the air-gathering ring and the outer shell at both ends of the radial direction of the head. The connecting roots are flat relative to the inner surface of the head, which facilitates the demolding of the inner shell during the production process.

[0020] Preferably, the air supply module includes an impeller, the tail of which is a conical structure in the air inlet direction. The taper of the tail is greater than the taper of the conical surface of the air-gathering ring, thus forming a flow channel with a smooth transition and gradually narrowing cross-section from the air inlet direction to the impeller, thereby effectively guiding and pre-compressing the airflow.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] The gradually narrowing acceleration air duct is formed by the design of the air duct shell, the air gathering ring and the air guide plate. The vortex kinetic energy is converted into a directional and high-velocity airflow jet unit, which solves the defect of short air delivery distance caused by air dispersion in traditional fans. By reducing air vortex and turbulence, the discomfort of direct air blowing is reduced, and the user's performance and experience are improved.

[0023] By hinged the assembled neck and head to the upper part of the handpiece, the angle of the head relative to the handpiece can be adjusted. When the user places the device on the table via the plug-in base, the tilt angle of the head can be infinitely adjusted, making it easy for the user to control the airflow direction. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a handheld fan according to the present invention;

[0025] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0026] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 4 This is a schematic diagram of the inner shell structure in this utility model;

[0028] Figure 5 This is a schematic diagram of the inner shell from another angle in this utility model;

[0029] Figure 6 This is a schematic diagram of the hand-held part in this utility model.

[0030] Reference numerals: 1. Handheld part; 2. Head; 3. Insertion base; 4. Neck; 5. Air duct housing; 6. Air supply module; 10. Movable slot; 11. Shaft hole; 12. First housing; 13. First vertical part; 14. First horizontal part; 15. Second housing; 16. Second vertical part; 17. Second horizontal part; 18. Snap-fit ​​part; 20. Inner housing; 201. Stepped surface; 21. Outer housing; 211. Mesh cover part; 212. Fitting part; 213. First barb part; 22. Baffle ring; 221. Second barb part; 23. Gap; 24. Air gathering ring; 25. Guide plate; 251. Axial plate; 252. Angled plate; 253. Vertical plate; 254. V-shaped plate; 26. Impeller; 261. Tail end; 27. Wiring groove; 28. Cooling and cooling module; 29. ​​Connection root. Detailed Implementation

[0031] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 6As shown, this embodiment discloses a handheld fan, including a handheld part 1 and a head 2. The end of the handheld part 1 away from the head 2 is provided with a plug-in base 3 for the handheld part 1 to be inserted and fixed. The end of the handheld part 1 near the head 2 is provided with a movable groove 10. A neck 4 is hinged in the movable groove 10. The movable groove 10 can be a through cavity that runs back and forth in the direction of use facing the user or a slot-shaped opening with a vertical side wall and a horizontal bottom wall to limit the neck 4 by 90°. No limitation is made here. The neck 4 extends towards the head 2 and is fixedly connected to the head 2. The head 2 includes an air duct housing 5 and an air delivery module 6 disposed in the air duct housing 5.

[0033] The duct housing 5 is equipped with a wind-gathering ring 24 coaxial with the air supply module 6. The duct housing 5 includes an inner shell 20 and an outer shell 21 nested together. The outer shell 21 has a flared structure along the air outlet direction. A gap 23 is provided between the outer shell 21 and the inner shell 20. The inner shell 20 has a cylindrical structure. The inner circular surface of the inner shell 20 is fixed to the guide plate 25. The outer shell 21 includes a mesh part 211 located in the air inlet direction and a fitting part 212 fitted on the outside of the inner shell 20. An air duct is formed between the inner circular surface of the inner shell 20 and the outer circular surface of the wind-gathering ring 24. The outer circular surface of the wind-gathering ring 24 is a conical surface and a circumferential surface in sequence along the air outlet direction, thereby making the cross-sectional area of ​​the air duct in the duct housing 5 gradually decrease from the air inlet direction to the air outlet direction.

[0034] The air-gathering ring 24 is located in the air outlet direction of the air supply module 6 and is fixed to the air duct housing 5 by the guide plate 25. The guide plate 25 includes an axial plate 251 and an inclined plate 252, which makes the guide plate 25 have a bent structure. Its bending reference line is located in the middle section of the guide plate 25 along the axis of the head 2. The adjacent plane between the inclined plate 252 and the axial plate 251 is in the same plane as the adjacent plane of the conical surface and the circumferential surface of the air-gathering ring 24.

[0035] The guide plate 25 located on the lower vertical direction is composed of two parallel vertical plates 253 and a V-shaped plate 254 connected between the two vertical plates 253. The tip of the V-shaped plate 254 faces the air outlet direction of the air supply module 6, and the upper ends of the two vertical plates 253 are connected to the air gathering ring 24.

[0036] To reduce the energy consumption generated by the guide plate 25, the tilting direction of the inclined plate 252 is tangent to the airflow swirl direction of the air supply module 6.

[0037] The end of the air-gathering ring 24 facing the user has a cooling module 28 with the same structure as the prior art. The handheld part 1 has functional components such as a power supply unit, switch and adjustment button with the same structure as the prior art. The air supply module 6 includes an impeller 26. The tail 261 of the impeller 26 in the air inlet direction has a conical structure. The taper of the tail 261 is greater than the taper of the conical surface of the air-gathering ring 24.

[0038] The guide plate 25 has connecting roots 29 at both ends of the head 2 along the radial direction between the wind-gathering ring 24 and the outer shell 21, respectively. The connecting roots 29 are flat relative to the inner surface of the head 2.

[0039] The inner shell 20 has a stepped surface 201 on the axial end face in the air outlet direction, and the sleeve part 212 has a retaining ring 22 at the axial end face that can limit the axial movement of the inner shell 20.

[0040] The axial end face of the fitting part 212 extends toward the axis with a first barb part 213, and the outer circular surface of the retaining ring 22 is provided with a second barb part 221 extending outward. The first barb part 213 and the second barb part 221 can be locked together.

[0041] The neck 4 is formed by splicing together a first shell 12 and a second shell 15 in the shape of an inverted T. The first shell 12 includes a first horizontal part 14 and a first vertical part 13. The second shell 15 includes a second horizontal part 17 and a second vertical part 16 opposite to the first horizontal part 14 and the first vertical part 13. The first horizontal part 14 and the second horizontal part 17 are combined to form a hinge shaft that is hinged to the two side walls of the movable groove 10. The hinge shaft is hollow inside and has two axial ends that pass through to facilitate wiring. The two side walls of the movable groove 10 are provided with shaft holes 11 for the hinge shaft to be inserted. The shaft holes 11 can connect the internal space of the handheld part 1 with the movable groove 10, so that the wire can be extended from there to the inside of the head 2, thereby realizing the electrical connection between the power supply unit, switch, adjustment button, cooling module 28 and air supply module 6. The first vertical part 13 is fixedly connected to the outer circular surface of the outer shell 21.

[0042] The second vertical part 16 is provided with a snap-fit ​​part 18 at one end near the head 2. The outer shell 21 is provided with a wiring groove 27 for the snap-fit ​​part 18 to pass through. After the snap-fit ​​part 18 passes through the wiring groove 27, it snaps between the outer shell 21 and the inner shell 20. Thus, the second vertical part 16 is fixed in the XYZ three-axis direction by the first vertical part 13 and the snap-fit ​​part 18, thereby ensuring the stability of the neck 4 structure.

[0043] Under the action of the impeller 26, the air is blown out from back to front along the axial direction of the head 2. After being accelerated through the air duct with a gradually decreasing cross-sectional area, it forms a directional high-pressure airflow. When it flows through the guide plate 25, due to the wall effect, the airflow wedges into the separation space formed between two adjacent inclined plates 252 along the inclined direction of the inclined plate 252. Compared with the existing design that only has an axial plate 251 parallel to the axial direction, it can reduce the kinetic energy loss generated when the airflow acts on the surface of the guide plate 25. Thus, while ensuring efficiency, the concentrated airflow is divided into several independent parallel airflow bundles, reducing energy consumption, reducing air eddies and turbulence, and reducing the discomfort of direct airflow to users.

[0044] When the user needs to place the handheld fan on the desktop and change its airflow angle, the handheld part 1 is inserted into the plug-in base 3 to increase the overall bottom area of ​​the structure, thereby improving the stability and anti-tipping ability of the overall structure. At this time, fixing the handheld part 1 causes the head 2 to drive the neck 4 to swing, that is, the hinge position of the neck 4 can be used as the axis of rotation to achieve the tilt angle adjustment of the head 2.

Claims

1. A handheld fan, comprising a handheld part and a head, wherein the end of the handheld part away from the head is provided with a plug-in base for inserting and fixing the handheld part, characterized in that: The handheld part has a movable groove at one end near the head, and a neck is hinged in the movable groove. The neck extends towards the head and is fixedly connected to the head. The head includes an air duct housing and an air supply module disposed within the air duct housing. An air gathering ring coaxial with the air supply module is provided in the air duct housing. An air duct is formed between the inner circular surface of the air duct housing and the outer circular surface of the air gathering ring. The air gathering ring causes the cross-sectional area of ​​the air duct within the air duct housing to gradually decrease from the air inlet direction to the air outlet direction. The air gathering ring is located in the air outlet direction of the air supply module and is fixed to the air duct housing by a guide plate. The guide plate has a bent structure, and its bending reference line is located in the middle section of the guide plate along the axis of the head.

2. A handheld fan according to claim 1, characterized in that: The outer surface of the wind-gathering ring is a conical surface and a circumferential surface in sequence along the air outlet direction.

3. A handheld fan according to claim 2, characterized in that: The guide plate includes an axial plate and an inclined plate. The inclination direction of the inclined plate is tangent to the airflow direction of the air supply module. The adjacent plane between the inclined plate and the axial plate is in the same plane as the adjacent plane of the conical surface and the circumferential surface of the air gathering ring.

4. A handheld fan according to claim 3, characterized in that: The guide plate located on the lower vertical direction is composed of two parallel vertical plates and a V-shaped plate connected between the two vertical plates. The tip of the V-shaped plate faces the air outlet direction of the air supply module, and the upper ends of the two vertical plates are connected to the air gathering ring.

5. A handheld fan according to claim 4, characterized in that: The air duct housing includes an inner shell and an outer shell that are nested together. The outer shell has a flared structure along the air outlet direction. There is a gap between the outer shell and the inner shell. The inner shell has a cylindrical structure. The inner circular surface of the inner shell is fixed to the guide plate. The outer shell includes a mesh cover part located in the air inlet direction and a sleeve part sleeved on the outside of the inner shell. The axial end face of the inner shell located in the air outlet direction has a stepped surface. The axial end face of the sleeve part has a retaining ring that can limit the axial movement of the inner shell.

6. A handheld fan according to claim 5, characterized in that: The axial end face of the fitting part extends toward the axis, and the outer circular surface of the retaining ring is provided with an outwardly extending second barb. The first barb and the second barb can be locked together.

7. A handheld fan according to claim 5, characterized in that: The neck is formed by splicing together a first shell and a second shell in the shape of an inverted T. The first shell includes a first horizontal part and a first vertical part. The second shell includes a second horizontal part and a second vertical part opposite to the first horizontal part and the first vertical part. The first horizontal part and the second horizontal part are combined to form a hinge shaft that is hinged to the two side walls of the movable groove. The first vertical part is fixedly connected to the outer circular surface of the outer shell.

8. A handheld fan according to claim 7, characterized in that: The second vertical part has a snap-fit ​​part at one end near the head, and the outer shell has a wiring groove for the snap-fit ​​part to pass through. After passing through the wiring groove, the snap-fit ​​part snaps into the outer shell and the inner shell.

9. A handheld fan according to claim 8, characterized in that: The guide plate has connecting roots between its radial ends and the wind-gathering ring and the outer shell, respectively, and the connecting roots are planar relative to the inner surface of the head.

10. A handheld fan according to claim 2, characterized in that: The air supply module includes an impeller, and the tail of the impeller in the air inlet direction has a conical structure, the taper of which is greater than the taper of the conical surface of the air gathering ring.

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