Fan head

Abstract

The invention relates to the technical field of fans, and particularly discloses a fan head which comprises a fan shell, an air outlet cover and a flow guide cover. Wherein the fan shell is of a long-barrel-shaped structure, one end of the fan shell is folded in the radial direction to form an air outlet, and an inner barrel is arranged in the fan shell; the air outlet cover is of an annular structure and is clamped to the air outlet. The flow guide cover is arranged in the air outlet, a sealing end is formed at the outward end of the flow guide cover, an opening end is formed at the inward end of the flow guide cover, the opening end is of a hollow structure and is connected to the inner cylinder, and the sealing end is of an arc-shaped outwards-protruding structure and is used for being matched with the air outlet cover to reduce vortexes and noise generated at the air outlet when the fan head discharges air. The inner diameter of the air outlet is smaller than the diameter of an air flow channel formed in the fan shell and used for compressing the air outlet volume at the air outlet so as to increase the air supply distance. The air outlet cover is combined with the arc-shaped outwards-protruding sealing end of the flow guide cover, so that vortexes and noise at the air outlet are reduced.

Description

[0001] Divisional application

[0002] This application is a divisional application of [Application Number: 202110298949.4] [Invention Name: Base and Handheld Fan with Base] filed on March 20, 2021. Technical Field

[0003] The embodiments of the present invention relate to the technical field of fans, and in particular to a fan head. Background Art

[0004] Handheld fans are popular among many people because they are compact, easy to carry, and convenient for close-range use. Currently, the fan heads of handheld fans on the market mostly adopt an open air outlet design, generally still composed of flat, fully open front and rear mesh covers, and their air outlet covers are usually flat grid structures or simple conical covers. This type of design has obvious defects when delivering air at high speeds. For example, the air flow is prone to sudden diffusion at the junction of the air outlet edge and the outer shell, generating vortexes. This not only makes it easy for the air to diverge, resulting in a shorter air supply distance, but also causes significant wind noise. In addition, existing air guide covers mostly adopt an outward-convex guide vane design. When the air flows through the gap between the air guide cover and the air outlet cover, the sudden change in pressure can easily induce secondary vortices, resulting in high-frequency howling.

[0005] Therefore, how to ensure the continuity of the flow channel between the air outlet cover and the outer shell and the sealing of the air guide cover, thereby reducing the air flow diffusion generated at the air outlet when using a handheld fan, resulting in a shorter air supply distance, and reducing the vortex and noise generated by the air outlet, has become an important issue to be solved in the industry. Summary of the Invention

[0006] Based on this, it is necessary to provide a fan head that can reduce airflow diffusion, vortex and noise generated at the air outlet when the fan is in use, in order to address the above technical problems.

[0007] An embodiment of the present application provides a fan head, the fan head comprising:

[0008] A fan housing, wherein the fan housing is in the shape of a long cylinder and radially converges at one end to form an air outlet, and an inner cylinder is provided in the fan housing;

[0009] An air outlet cover, which is an annular structure and is snap-connected to the air outlet;

[0010] A deflector is disposed within the air outlet and has a sealed end at one end facing outward and an open end at one end facing inward. The open end is hollow and connected to the inner cylinder, and the sealed end is an arc-shaped convex structure, and is used to cooperate with the air outlet cover to reduce vortexes and noise generated at the air outlet when the fan head discharges air;

[0011] The inner diameter of the air outlet is smaller than the diameter of the air flow channel formed in the fan housing, and is used to compress the air outlet volume at the air outlet to increase the air supply distance.

[0012] In one embodiment, the fan head further comprises:

[0013] Fixed guide vanes, multiple fixed guide vanes are arranged at intervals along the radial direction, and each fixed guide vane includes a first part and a second part connected to the first part, the first part includes two side walls arranged opposite to each other, and the two side walls are respectively arranged on the inner wall of the inner tube and the inner wall of the fan casing, and one end of the second part extends to the air outlet.

[0014] In one embodiment, one end of the second portion extends to the air outlet, the sealing end of the air guide cover is located at the air outlet, and the fixed guide vanes form a diversion structure to gather the outgoing air and increase the air supply distance.

[0015] In one embodiment, along the radial direction of the fan housing, the end of the fan housing close to the air outlet does not protrude the multiple fixed guide vanes and the air guide cover, or the multiple fixed guide vanes and the air guide cover do not protrude from the end of the fan housing close to the air outlet.

[0016] In one embodiment, the width of each of the fixed guide vanes gradually narrows from the inner cylinder toward the air outlet and is arc-shaped.

[0017] In one embodiment, a motor is installed in the inner cylinder, one end of the motor is connected to an impeller, and the impeller includes a hub, a plurality of blades connected to the hub, and a rotating shaft connected to the hub;

[0018] In which, the gap between the fan blades and the inner wall of the fan housing is less than 1.6 mm, the rotating shaft is used to connect to the motor, and the ratio of the diameter of the motor's magnetic ring to the length of the fan blades is greater than or equal to 2:1, so as to reduce the gyroscopic effect of the handheld fan.

[0019] In one embodiment, the fan head further comprises: an air inlet cover, the air inlet cover being mounted at the air inlet located at the other end of the fan housing;

[0020] The air inlet cover has a plurality of evenly arranged and curved air inlet guide vanes, and the curvature direction of each air inlet guide vane is opposite to the rotation direction of the impeller; or the air inlet cover is arranged in a grid-like or honeycomb-like shape.

[0021] In one embodiment, the air inlet cover and the fan housing are connected by a first engaging structure, wherein the first engaging structure includes a plurality of first recessed portions recessed on a side wall of the air inlet cover and a plurality of first raised portions protruding on an inner wall of the fan housing;

[0022] The shape and size of the first protrusion match those of the first recess, so that when the air inlet cover is installed, the first protrusion extends into one end of the air inlet through the side wall of the air inlet cover and engages with the first recess and the first protrusion.

[0023] In one embodiment, the air outlet cover is clamped to one end of the air outlet via a second clamping structure;

[0024] The second engaging structure includes a plurality of second recessed portions recessed on the inner wall of the air outlet cover and a plurality of second raised portions protruding on the outer wall of the air outlet, and the shape and size of the second raised portions are adapted to those of the second recessed portions;

[0025] When the air outlet cover is clamped to the air outlet, the second protrusion is clamped into the second recess to achieve connection.

[0026] In one embodiment, the open end has a clamping end formed by shrinkage, and the clamping end is clamped with the second portion of the inner tube via a third engaging structure;

[0027] The third engaging structure includes a plurality of third recessed portions formed on the side wall of the second portion and a plurality of third raised portions formed on the outer wall of the engaging end.

[0028] When the air deflector is installed, the clamping end of the air deflector extends into the second portion and the third protrusion is clamped into the third recess to achieve connection.

[0029] The fan head has the following advantages: on the one hand, the inner diameter of the air outlet is designed to be smaller than the diameter of the air flow channel formed in the fan shell, so that the air volume is compressed to increase the air pressure, and the air volume compression is at the end of the air outlet, thereby facilitating air flow gathering to increase the air supply distance; and the radial contraction design of the air outlet cover forms an arc transition structure between the outer wall of the air outlet cover and the fan shell, eliminating the air flow separation phenomenon at the traditional right-angle joint, so that the air outlet flow is directed along a continuous curvature path by combining the arc sealing end of the air inlet cover; on the other hand, the sealing end of the air inlet cover is recessed into the air outlet to form an embedded air guide cavity, so that the air flow is integrated into a streamline before leaving the air outlet, thereby solving the technical problem of high-frequency whistling caused by secondary vortex flow due to pressure mutation of the hollow air, thereby greatly reducing the vortex flow and noise at the air outlet, and the fan has no obvious gyroscopic effect, and the use experience is more comfortable.

[0030] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0032] Figure 1 is a structural schematic diagram of a handheld fan with a base of the present application.

[0033] Figure 2 is Figure 1 is a structural schematic diagram of the handheld fan from another angle.

[0034] Figure 3 is Figure 2 is a rear view of the handheld fan.

[0035] Figure 4 is Figure 2 is a side view of the handheld fan.

[0036] Figure 5 is Figure 2 is a sectional view of the handheld fan.

[0037] Figure 6 is Figure 2 is an exploded view of the handheld fan.

[0038] Figure 7 is Figure 2 is another exploded view of the handheld fan.

[0039] Figure 8 It is an exploded view of the fan housing and handle of the handheld fan of the present invention.

[0040] Figure 9 yes Figure 8 Cross-sectional view of the middle fan housing and the first housing.

[0041] Figure 10 yes Figure 8 Another cross-sectional view of the middle fan housing and the first housing.

[0042] Figure 11 It is a side view of the motor and impeller of the handheld fan of the present invention.

[0043] Figure 12 It is a structural schematic diagram of the first embodiment of the base of the present invention.

[0044] Figure 13 yes Figure 12 Front view of .

[0045] Figure 14 yes Figure 13 Top view of .

[0046] Figure 15 It is along Figure 14 Sectional view along line AA.

[0047] Figure 16 It is along Figure 14 Cross-sectional view along line BB.

[0048] Figure 17 yes Figure 12 Exploded diagram of .

[0049] Figure 18 yes Figure 12 Another angle of the exploded view.

[0050] Figure 19 It is a structural schematic diagram of the second embodiment of the base of the present invention.

[0051] Figure 20 yes Figure 19 sectional view of .

[0052] Figure 21 The present invention is a schematic diagram of a handheld fan with a base in use.

[0053] Figure 22 yes Figure 21 sectional view of .

[0054] Figure 23 This is a schematic diagram of another usage state of the handheld fan with a base according to the present invention. DETAILED DESCRIPTION

[0055] Embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like reference numerals represent like elements. The present invention provides a handheld fan 1 with a base, comprising a handheld fan 100 and a base 200. The handheld fan 100 can be used by hand alone or inserted into the base 200 and placed on a table or countertop. When the handheld fan 100 is inserted into the base 200, the air outlet angle of the handheld fan 100 can be easily and quickly adjusted, thereby providing a better user experience and performance.

[0056] In addition, the handheld fan 100 provided by the present invention has a smaller volume than the existing handheld fans. Specifically, the length L of the handheld fan 100 is less than or equal to 162.5 mm, the width W is less than or equal to 50.5 mm, and the thickness H is less than or equal to 52.5 mm. Figure 3-4 As shown; compared with the common handheld fans currently on the market (the length is generally not less than 200mm, the width is generally not less than 100mm), the handheld fan 100 of the present invention is smaller in size, lighter in weight, and more convenient to carry.

[0057] It should be noted that, for the handheld fan 1 with a base of the present invention, the size of the handheld fan 100 is not limited to the above-mentioned numerical range. Of course, its size range can be set separately as needed, and for handheld fans 100 of any other size, they can be combined with the corresponding base 200 to achieve adjustment of the air outlet angle.

[0058] The following is combined with Figure 1-23 As shown, the structures of the handheld fan 100 and the base 200 of the present invention are described in detail.

[0059] Combine first Figure 1-Figure 5 As shown, the handheld fan 100 provided by the present invention includes a fan head 110, a handle 120, a motor 130, an impeller 140, a power supply 150 and a control component 160. The fan head 110 is an elongated cylindrical structure as a whole and has an air inlet 1111 and an air outlet 1112 formed at both ends. The motor 130 and the impeller 140 are installed in the fan head 110 and are connected to each other. The motor 130 is used to drive the impeller 140 to rotate. The impeller 140 is directly opposite the air inlet 1111, and the impeller 140 is at a certain distance from the air inlet 1111 and the air outlet 1112. That is, the impeller 140 is housed in the elongated cylindrical fan head 110 and is not exposed. During use, it is difficult for fingers or debris to come into contact with the fan blades, making it safer and more reliable to use. The upper end of the handle 120 is connected to the approximate middle of the fan head 110, and the lower end of the handle 120 forms a plug-in terminal adapted to the base (details will be described later); the power supply 150 and the control component 160 are respectively arranged in the handle 120 and are respectively electrically connected to the motor 130.

[0060] The following combination Figure 5-Figure 7 、 Figure 11 As shown, in the present invention, the impeller 140 includes a hub 141, a plurality of blades 142 connected to the hub 141, and a rotating shaft 143 connected to the hub 141 (see FIG. Figure 6 ), and the rotating shaft 143 is connected to the motor 130. Since the overall volume of the handheld fan 100 and the fan head 110 of the present invention are both smaller than those of existing handheld fans, the area of ​​the fan blades 142 is correspondingly reduced, preventing the handheld fan 100 from being top-heavy when held. Furthermore, the present invention utilizes a high-speed brushless DC outer rotor motor, specifically a motor 130 with a speed of 4,000 to 10,000 rpm, thereby increasing air volume and pressure, thereby extending the air delivery distance.

[0061] Continue to read Figure 11 As shown, in the present invention, the ratio of the diameter D3 of the magnetic ring of the motor 130 (including the housing) to the length L1 of the fan blade 142 is greater than or equal to 2:1, which is different from the ratio of the diameter of the motor magnetic ring (including the housing) to the length of the fan blade of the traditional axial flow handheld fan being less than or equal to 1:3, so that the handheld fan 100 of the present invention can greatly reduce the gyro effect.

[0062] See Figure 5 As shown, in the present invention, the gap between the fan blades 142 and the inner wall of the fan housing 111 (described later) of the fan head 110 is less than 1.6 mm. Combined with the high speed of the motor 13, ultra-high wind pressure is achieved, so the air supply distance is longer.

[0063] Continue to read Figure 5-Figure 7The fan head 110 includes a fan housing 111, fixed guide vanes 112, a deflector 113, an air inlet cover 114, and an air outlet cover 115. The fan housing 111 is a long cylindrical structure with the air inlet 1111 and the air outlet 1112 formed at both ends, respectively. The air inlet cover 114 is installed at the air inlet 1111, and the air outlet cover 115 is snapped onto one end of the air outlet 1112. The fan housing 111 is also provided with an inner cylinder 116 spaced apart from its inner wall, and the motor 130 is installed in the inner cylinder 116. The fan housing 111 with a long cylindrical structure makes the air inlet cover 114 and the air outlet cover 115 farther away from the fan blades 142, making it more difficult for fingers or debris to touch the fan blades 142, making it safer and more reliable to use. Multiple fixed guide vanes 112 are radially spaced apart between the inner cylinder 116 and the inner wall of the fan housing 111. One end of each fixed guide vane 112 extends to the air outlet 1112. The guide structure formed by the fixed guide vanes 112 can gather the outgoing air, thereby increasing the wind pressure and wind speed, and extending the air supply distance. The air deflector 113 has a hollow structure with one end open and the other end sealed. The open end of the air deflector 113 is connected to the inner cylinder 116. The sealed end of the air deflector 113 is located at the air outlet 1112 and has an arc-shaped structure. The provision of the air deflector 113 not only isolates the internal noise generated by the fan 100 during operation, achieving a noise reduction effect, but also has the effect of reducing eddy currents, while also making the handheld fan 100 more beautiful in appearance.

[0064] Continue to combine Figure 3 、 Figure 5-Figure 7 As shown, the air inlet cover 114 has a plurality of uniformly arranged and curved air inlet guide vanes 1141, and the curvature direction of each air inlet guide vane 1141 is opposite to the rotation direction of the impeller 140, see Figure 3 The arrangement of the air inlet guide vanes 1141 makes the wind resistance smaller and the air inlet smoother. Of course, the air inlet cover 114 is not limited to the structural arrangement of the air inlet guide vanes 1141. For example, in other embodiments, the air inlet cover 114 can be arranged in a grid shape, a honeycomb shape, or other shapes.

[0065] In the present invention, the air inlet cover 114 and the fan housing 111 are connected by a first engaging structure. Specifically, the first engaging structure includes a plurality of first recessed portions 1142 (see FIG. Figure 6 As shown) and a plurality of first protrusions 1113 (see FIG. Figure 8As shown, the shape and size of the first protrusion 1113 match the first recess 1142. The first recess 1142 can be a groove or through-hole, while the first protrusion 1113 can be a bump or rib. When the air inlet cover 114 is installed, its sidewall extends into one end of the air inlet 1111 of the fan housing 111, and the first recess 1142 thereon engages with the first protrusion 1113. It is understood that the positions of the first protrusion 1113 and the first recess 1142 are interchangeable.

[0066] The following combination Figure 5-11 As shown, further, one end of the air outlet 1112 of the fan housing 111 is folded to form an air outlet end, so that the inner diameter D1 of the air outlet 1112 is smaller than the diameter D2 of the air flow channel formed in the fan housing 111 (see Figure 9 ), thereby increasing the wind pressure through volume compression, and the volume compression at one end of the axial air outlet 1112 is more conducive to air flow gathering, thereby increasing the air supply distance.

[0067] In addition, the air outlet cover 115 is annular in structure, and the air outlet cover 115 is connected to the air outlet end via a second engaging structure, and the air outlet cover 115 forms an arc-shaped transition with the outer wall of the fan housing 111, as shown in FIG. Figure 5 Specifically, the second engaging structure includes a plurality of second recessed portions 1151 (such as Figure 7 As shown) and a plurality of second protrusions 1114 (as shown) protruding from the outer wall of the air outlet end Figure 8 (As shown), the shape and size of the second protrusion 1114 are compatible with the second recess 1151. The second recess 1151 may be a groove or through-hole, while the second protrusion 1114 may be a bump or rib. When the air outlet cover 115 is attached to the outlet end, the second protrusion 1114 engages with the second recess 1151 to achieve connection. Of course, the positions of the second protrusion 1114 and the second recess 1151 are interchangeable.

[0068] Continue to combine Figure 5-Figure 6 、 Figure 9-10 As shown, each fixed guide vane 112 is a flat sheet-like structure, and its length extends along the axial direction of the fan housing 111. The width of the fixed guide vane 112 gradually narrows from the inner barrel 116 toward the air outlet 1112 and forms an arc. The arcuate edge 1121 of the fixed guide vane 112 is slightly spaced from the air guide cover 113. In the present invention, the ratio of the length L1 of the blade 142 to the length of the fixed guide vane 112 is less than or equal to 1:2. Therefore, the airflow forms effective viscosity when it rotates and flows out of the fan housing 111, greatly improving the focusing effect of the airflow and achieving an extremely long blowing distance.

[0069] Continue to combine Figure 5-Figure 7 、 Figure 9-10As shown, a partition 1161 is further provided within the inner cylinder 116, dividing the inner cylinder 116 into a first portion 116a and a second portion 116b. A mounting shaft 1162 is protruding from the first portion 116a and is integrally formed with the partition 1161. The motor 130 is mounted on the mounting shaft 1162. The air duct 113 is mounted on the second portion 116b.

[0070] Specifically, the open end of the air deflector 113 has a contracted clamping end, the outer diameter of which corresponds to the inner diameter of the second portion 116b, and the clamping end and the second portion 116b are clamped together by a third engaging structure. Specifically, the third engaging structure includes a plurality of third recessed portions 1163 (see FIG. 1 ) formed on the side wall of the second portion 116b. Figure 9-10 ) and a plurality of third protrusions 1131 (see Figure 7 ), in this embodiment, the third recessed portion 1163 is a through hole, but it is not limited thereto. It can also be a groove. The third raised portion 1131 is a bump that matches the through hole. Of course, it can also be set as a rib, etc., as long as it can be firmly connected with the third recessed portion 1163. When installing the air deflector 113, the clamping end of the air deflector 113 extends into the second portion 116b and the third raised portion 1131 is clamped into the third recessed portion 1163 to achieve connection. See FIG. Figure 5 shown.

[0071] See again Figure 5-Figure 7 、 Figure 9 As shown, the fan head 110 is further provided with a hollow connecting column 117, one end of which protrudes radially outward to form an abutment portion 1171. The fan housing 111 is provided with an internal mounting hole 1115 connected to the handle 120. The connecting column 117 is inserted into the mounting hole 1115, and the abutment portion 1171 abuts against the outer wall of the fan housing 111. The other end of the connecting column 117 protrudes from the first portion 116a of the inner cylinder 116. Figure 5 , the wiring is routed through the connecting column 117 to avoid exposure of the wiring, thereby ensuring the safety and aesthetics of the handheld fan 100.

[0072] Combine Figure 1-Figure 5 As shown, in the present invention, the plug-in end 120a formed at the lower end of the handle 120 is hemispherical. When the plug-in end 120a of the handle is plugged into the base 200, it can be rotated 360° along the base 200, making the handheld fan 100 more convenient to use. In addition, through the cooperation between the plug-in end 120a and the base 200, the air outlet angle of the handheld fan 100 can be adjusted (see below for details).

[0073] Combine Figure 5-8As shown, in the present invention, the handle 120 includes a first housing 121 and a second housing 122 that are detachably connected. The first housing 121 is connected to the fan housing 111. In one embodiment, the first housing 121 and the fan housing 111 are integrally formed. Of course, this is not limited to this molding method. The two can be formed separately and then connected as a whole without affecting the realization of their functions. After the second housing 122 is connected to the first housing 121, a first accommodating space is enclosed between the first and second housings 121, 122. The power supply 150 and the control component 160 are both accommodated in the first accommodating space.

[0074] More specifically, the first shell 121 and the second shell 122 are connected to each other through a fourth locking structure, which includes a fourth recessed portion and a fourth raised portion. In addition, one of the first shell 121 and the second shell 122 is also provided with a locking piece, and the fourth recessed portion is opened on the locking piece. The fourth raised portion is provided on the other of the first shell 121 and the second shell 122 and cooperates with the fourth recessed portion. The detachable connection between the first shell 121 and the second shell 122 is achieved by the detachable locking between the fourth raised portion and the fourth recessed portion.

[0075] Continue to combine Figure 5-10 As shown, in one embodiment, the first housing 121 defines a button hole 1211 communicating with its interior, and a plurality of engaging tabs 1212 are protruding from the edge of the sidewall of the first housing 121. The engaging tabs 1212 define a fourth recess 1213, which is specifically, but not limited to, a engaging hole. Correspondingly, the second housing 122 defines a charging hole 1221 communicating with its interior, and a recess 1222 is defined on the inner wall of the second housing 122. The shape and size of the recess 1222 correspond to those of the engaging tab 1212. A fourth protrusion 1223, preferably a bump, is disposed within the recess 1222. When the first and second housings 121, 122 are engaged, the engaging tabs 1212 extend into the recess 1222, allowing the fourth protrusion 1223 to engage with the fourth recess 1213, achieving connection.

[0076] See again Figure 5-Figure 7 As shown, the control assembly 160 includes a button 161, a first charging port 162, and a circuit board 163. The control assembly 160 is mounted within the handle 120, with the button 161 protruding from the button hole 1211 and the first charging port 162 protruding from the charging hole 1221. The power supply 150 is housed within the handle 120 at its lower end and is used to power the circuit board 163 and the motor 130. The principles and configuration of the power supply 150 and the control assembly 160 are conventional and well known to those skilled in the art, and therefore will not be described in detail.

[0077] See again Figure 2 As shown, more preferably, a first charging structure 170 for charging the power supply is further provided at the bottom of the handle 120, and a through-hole (not numbered) is provided at the bottom of the plug end 120a. The first charging structure 170 is provided in the through-hole and exposed from the handle 120. Specifically, the first charging structure 170 includes a first metal sheet 171 and a second metal sheet 172, wherein the first metal sheet 171 is annular and the second metal sheet 172 is circular. The first metal sheet 171 is installed in the aforementioned through-hole, and the second metal sheet 172 is inserted into the first metal sheet 171 and is insulated from the first metal sheet 171. The first metal sheet 171 and the second metal sheet 172 are respectively electrically connected to the power supply 150. When the handle 120 is plugged into the base 200, the first metal sheet 171 and the second metal sheet 172 can contact and conduct with the charging spring pin 242 (described later) on the base 200, thereby charging the power supply 150 through the base 200. It can also ensure that the handle 120 can rotate 360° in the base 200 without interference, making the use of the handheld fan 100 more diversified and more convenient.

[0078] It is understandable that the first metal sheet 171 and the second metal sheet 172 are not limited to the above-mentioned sleeve structure. As long as both can contact the charging spring pin 242 on the base 200 and the contact surface between the two is a continuous plane, the handheld fan 100 can be charged and rotated freely.

[0079] As can be seen from the above description, the handheld fan 100 of the present invention can be charged through the first charging interface 162 on the handle 120, or through the first charging structure 170 at the bottom of the handle 120 in conjunction with the base 200, making it more diverse and convenient to use.

[0080] The following combination Figure 12-Figure 23 As shown, different embodiments of the base 200 of the present invention are described respectively.

[0081] See first Figure 12-16 As shown, in the first embodiment of the base 200 of the present invention, the base 200 has a plug-in slot 210 formed by a downward depression, and the plug-in slot 210 includes a first plug-in portion 211 located at the bottom and a second plug-in portion 212 located at the top. Figure 15 The first plug-in portion 211 is hemispherical and fits with the plug-in end 120a of the handle 120. The first plug-in portion 211 is tilted. Specifically, the centerline P2 of the first plug-in portion 211 forms a second angle a2 with the vertical direction. That is, the centerline P2 of the first plug-in portion 211 and the centerline P1 of the base 200 form a second angle a2. The second angle a2 can be flexibly set according to needs but should not be too large to prevent the handle from tilting along the first abutting surface 2121 and falling after being inserted into the base 200.

[0082] like Figure 15 As shown, the second plug-in portion 212 is formed by the upper end of the first plug-in portion 211 gradually expanding upward, and the second plug-in portion 212 has a first abutting surface 2121 and a second abutting surface 2122 opposite each other. The height of the first abutting surface 2121 is greater than the height of the second abutting surface 2122. That is, the distance between the top of the first abutting surface 2121 and the top of the first plug-in portion 211 is greater than the distance between the top of the second abutting surface 2122 and the top of the first plug-in portion 211. Furthermore, the first abutting surface 2121 is inclined relative to the vertical direction and has a first angle a1. Specifically, the first abutting surface 2121 gradually tilts from its bottom to its top away from the centerline P1 of the base 200. The first angle a1 can also be flexibly set as needed and should not be too large to prevent the handle 120 from tilting along the first abutting surface 2121 and tipping over after being inserted into the base 200. In the present invention, the first angle a1 and the second angle a2 are substantially the same and are preferably between 5° and 15°, but are not limited to the above angles.

[0083] In a specific embodiment of the present invention, the first angle a1 and the second angle a2 are both set to 7.5°. In this way, the stability of the handle 120 after being inserted into the base 200 can be ensured, and the air outlet angle of the handheld fan 100 can be adjusted.

[0084] Furthermore, in this specific embodiment, the second abutting surface 2122 is slightly tilted outward relative to the vertical direction or extends substantially along the vertical direction, but this is not limited to this arrangement. For example, in other embodiments, the second abutting surface 2122 may also be tilted relative to the vertical direction and tilted closer to the first abutting surface 2121 or away from the second abutting surface 2122, that is, the second abutting surface 2122 tilts toward the direction of the first abutting surface 2121 or tilts away from the first abutting surface 2121.

[0085] like Figure 12-17 As shown, further, an arc-shaped guide portion 213 is formed between the top of the outer wall of the base 200 and the top of the second plug-in portion 212. The guide portion 213 is formed by the top of the second plug-in portion 212 gradually expanding upward and outward. Through the setting of the arc-shaped guide portion 213, it is easier to insert the handheld fan into the plug-in slot 210 from any angle, thereby increasing the convenience of use.

[0086] Combine Figure 12-17 、 Figure 21-23As shown, when the handheld fan 100 is plugged into the base 200, the plug-in end 120a of the handle 120 is accommodated in the first plug-in part 211 of the plug-in slot 210, and the first shell 121 or the second shell 122 of the handle 120 abuts against the first abutting surface 2121 of the second plug-in part 212, i.e., the handle 120 is inclined along the first abutting surface 2121, so that the handle 120 has a first included angle a1 with respect to the vertical direction (i.e., the center line P1 of the base 200), thereby making the handheld fan 100 forwardly or rearwardly inclined by 7.5°, so that the air outlet direction has an angular adjustment range of about 7.5° upward and downward.

[0087] With reference to Figure 21-22 As shown, it shows a schematic view of the handheld fan 100 being forwardly plugged into the base 200, i.e., the plug-in end 120a of the handle 120 is accommodated in the first plug-in part 211, and the second shell 122 of the handle 120 abuts against the first abutting surface 2121 of the second plug-in part 212, so that the handheld fan 100 is rearwardly inclined by 7.5°, and meanwhile, the plug-in end 120a of the handle 120 is prevented from being abutted against the first plug-in part 211, thereby making the air outlet direction F of the handheld fan 100 be inclined upwardly with respect to the horizontal direction. Similarly, the state of the handheld fan 100 being reversely plugged into the base 200 can be referred to Figure 23 As shown, at this time, the first shell 121 of the handle 120 abuts against the first abutting surface 2121 of the second plug-in part 212, so that the air outlet of the handheld fan 100 is inclined downwardly, i.e., the air outlet direction F of the handheld fan 100 is inclined downwardly with respect to the horizontal direction.

[0088] Again in combination Figures 12-18 As shown, in the present application, the overall shape of the base 200 is not specifically limited, and the shape can be flexibly set to make the base 200 have a good appearance.

[0089] With reference to Figure 17-18 As shown, in the present embodiment, the base 200 comprises an upper shell 220 and a lower shell 230 which are detachably connected; the plug-in slot 210 is formed in the upper shell 220, and the lower shell 230 is used for being supported on a table top or a countertop. Specifically, the upper shell 220 has an outer side wall 221 and an inner side wall which are arranged in a spaced manner, the inner side wall is the side wall of the plug-in slot 210, the top end of the outer side wall 221 of the upper shell 220 is arc-shapedly transitioned with the top end of the inner side wall to form the guide part 213, and meanwhile, the outer side wall 221 of the upper shell 220 is in an outwardly convex arc-shaped structure, which can be in a regular shape or an irregular shape. The structure of the upper shell 220 makes the appearance of the base 200 more beautiful.

[0090] In this embodiment, the lower housing 230 includes a base plate 231 and side plates 232 connected to the base plate 231. The outer diameter of the side plates 232 corresponds to the inner diameter of the upper housing 220. The base plate 231 is flat, ensuring that the base 200 can be stably placed on a table or countertop. When the upper and lower housings 220 and 230 are installed, the side plates 232 of the lower housing 230 extend into the upper housing 220, and the upper and lower housings 220 and 230 are fixedly connected by screws. Of course, the upper and lower housings 220 and 230 can also be connected by other means, for example, by interlocking with mating recesses and protrusions.

[0091] More preferably, anti-slip feet 233 may be further provided on the bottom plate 231 of the lower shell 230. By providing the feet 233, the base 200 can be placed on a desktop or tabletop more stably.

[0092] See again Figure 15-17 As shown, a second charging structure 240 may be further provided in the base 200 , and the second charging structure 240 is used to charge the handheld fan 100 plugged into the base 200 . Specifically, the second charging structure 240 includes a charging circuit board 241, a charging spring pin 242, and a second charging interface 243. The charging spring pin 242 is connected to the charging circuit board 241, and the diameter of the charging spring pin 242 is less than 1 mm and has a telescopic range of 3 mm. Of course, the diameter and telescopic range of the charging spring pin 242 are not limited to this. The charging spring pin 242 protrudes into the aforementioned plug-in slot 210 and forms a second angle a2 with the vertical direction, that is, the charging spring pin 242 also forms an angle of 7.5° with the vertical direction (or with the center line P1 of the base 200). In this way, when the handle 120 of the handheld fan 100 is inserted into the plug-in slot 210, the first metal sheet 171 and the second metal sheet 172 at the bottom of the handle 120 respectively contact the two charging spring pins 242 and press down the two charging spring pins 242, so that the charging circuit is turned on, thereby charging the handheld fan 100 through the base 200 connected to the external power supply.

[0093] In this embodiment, a second accommodation space is formed between the upper shell 220 and the lower shell 230 of the base 200, and a through hole (not numbered, see FIG. 2 ) is provided at the bottom of the upper shell 220 to connect the second accommodation space and the plug-in slot 210. Figure 15 ), the charging circuit board 241 is fixed in the second accommodating space at a 7.5° angle to the horizontal, allowing the charging spring pin 242 to pass through the through hole and protrude into the insertion slot 210 at a 7.5° angle to the vertical. Furthermore, a through hole is formed in the outer wall 221 of the upper housing 220. The second charging port 243 is installed in this through hole and electrically connected to the charging circuit board 241.

[0094] In combination with the above description, since the bottom of the handle 120 is provided with a first metal sheet 171 and a second metal sheet 172, when the handle 120 is inserted into the insertion slot 210, the handle 120 can rotate 360° in the base 200 and can ensure that the two charging spring pins 242 are always connected to the first metal sheet 171 and the second metal sheet 172 to achieve charging.

[0095] See Figure 19-20 As shown, in the second embodiment of the base 200 of the present invention, compared with the above two embodiments, the arrangement of the plug-in slot 210 is exactly the same, and a second charging structure 240 is optionally provided, so it is not repeated here. The only difference is: the appearance of the base 200.

[0096] In this embodiment, the top of the upper shell 220 has an extension portion 222 extending along its radial direction. The extension portion 222 is an inclined plane structure. The extension portion 222 is formed by the outer edge of the guide portion 213 extending outward and upward along its radial direction. Figure 20 As shown, the lower surface of the extension portion 222 is also provided with a reinforcement rib 223. The lower housing 230 is a cylindrical structure, having a planar bottom plate 231 and an outer sidewall 232 and an inner sidewall 233 connected to the bottom plate 231 and spaced apart. During installation, the upper housing 220 is accommodated within the lower housing 230, with the reinforcement rib 223 abutting against the inner sidewall 233. At the same time, the extension portion 222 and the outer sidewall 221 are mutually engaged to achieve a connection. The bottom plate 231 ensures that the base 200 stably supports the handheld fan 100.

[0097] In summary, the handheld fan 1 with a base of the present invention, first of all, the plug-in slot 210 provided on the base 200 has a hemispherical first plug-in portion 211 and a second plug-in portion 212 that gradually expands upward, and the second plug-in portion 212 has a first abutting surface 2121 and a second abutting surface 2122 relative to each other, the first abutting surface 2121 is inclined relative to the vertical direction and has a first angle a1, therefore, when the handle 120 is plugged into the plug-in slot 210, the handle 120 abuts against the first abutting surface 2121 of the second plug-in portion 212 and is inclined relative to the vertical direction, so that the air outlet direction of the handheld fan 100 can also be at an angle relative to the horizontal direction, that is, the air outlet direction of the handheld fan 100 can be adjusted upward or downward, thereby realizing rapid adjustment of the air outlet direction. Secondly, a plurality of fixed guide vanes 112 are provided at intervals at one end of the air outlet 1112 of the fan housing 111 of the handheld fan 100, and the inner diameter D1 of the air outlet 1112 is smaller than the diameter D2 of the air flow channel formed in the fan housing 111, so that the wind pressure can be increased by volume compression, and the volume is compressed at one end of the air outlet 1112, which is more conducive to airflow gathering, thereby increasing the air supply distance; in addition, a hollow structured air guide cover 113 is provided at the air outlet 1112, and the sealing end of the air guide cover 113 is located at the bottom of the air outlet 1112. The arc-shaped structure at the air outlet 1112 and the air guide cover 113 can greatly reduce eddy currents and noise, so that the fan has no obvious gyroscopic effect, and the user experience is more comfortable; furthermore, the fan housing 111 has a long cylindrical structure, so that the fan blades 142 are located inside the fan housing 111 and away from the air inlet 1111 and the air outlet 1112, so it is more difficult for fingers or debris to touch the fan blades 142, and it is safer and more reliable to use; finally, the overall size of the handheld fan 100 is reduced, the weight is light, the grip is better, and it is more convenient to carry.

[0098] The other structures involved in the handheld fan 1 with a base of the present invention are conventional structures well known to those skilled in the art, and will not be described in detail here.

[0099] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope of the present invention.

Claims

1. A fan head, characterized in that: include: A fan housing, wherein the fan housing is in the shape of a long cylinder and radially converges at one end to form an air outlet, and an inner cylinder is provided in the fan housing; An air outlet cover, which is an annular structure and is snap-connected to the air outlet; A deflector is disposed within the air outlet and has a sealed end at one end facing outward and an open end at one end facing inward. The open end is hollow and connected to the inner cylinder, and the sealed end is an arc-shaped convex structure, and is used to cooperate with the air outlet cover to reduce vortexes and noise generated at the air outlet when the fan head discharges air; The inner diameter of the air outlet is smaller than the diameter of the air flow channel formed in the fan housing, and is used to compress the air outlet volume at the air outlet to increase the air supply distance.

2. The fan head according to claim 1, wherein: The fan head also includes fixed guide vanes, and a plurality of the fixed guide vanes are arranged at intervals along the radial direction. The fixed guide vanes each include a first part and a second part connected to the first part. The first part includes two oppositely arranged side walls, and the two side walls are respectively provided on the inner tube and the inner wall of the fan casing. One end of the second part extends to the air outlet.

3. The fan head according to claim 2, characterized in that: One end of the second portion extends to the air outlet, the sealing end of the air guide cover is located at the air outlet, and the fixed guide vanes form a diversion structure to gather the outgoing air and increase the air supply distance.

4. The fan head according to claim 3, characterized in that: Along the radial direction of the fan housing, the end of the fan housing close to the air outlet does not protrude the multiple fixed guide vanes and the air guide cover, or the multiple fixed guide vanes and the air guide cover do not protrude from the end of the fan housing close to the air outlet.

5. The fan head according to claim 2, wherein: The width of each fixed guide vane gradually narrows from the inner cylinder toward the air outlet and is arc-shaped.

6. The fan head according to claim 1, wherein: A motor is installed in the inner cylinder, one end of the motor is connected to an impeller, and the impeller includes a hub, a plurality of blades connected to the hub, and a rotating shaft connected to the hub; In which, the gap between the fan blades and the inner wall of the fan housing is less than 1.6 mm, the rotating shaft is used to connect to the motor, and the ratio of the diameter of the motor's magnetic ring to the length of the fan blades is greater than or equal to 2:1, so as to reduce the gyroscopic effect of the handheld fan.

7. The fan head according to claim 6, characterized in that: The fan head further comprises: an air inlet cover, the air inlet cover being mounted at the air inlet located at the other end of the fan housing; The air inlet cover has a plurality of evenly arranged and curved air inlet guide vanes, and the curvature direction of each air inlet guide vane is opposite to the rotation direction of the impeller; or the air inlet cover is arranged in a grid-like or honeycomb-like shape.

8. The fan head according to claim 7, characterized in that: The air inlet cover and the fan housing are connected by a first engaging structure, wherein the first engaging structure includes a plurality of first recessed portions recessed on the side wall of the air inlet cover and a plurality of first raised portions protruding on the inner wall of the fan housing; The shape and size of the first protrusion match those of the first recess, so that when the air inlet cover is installed, the first protrusion extends into one end of the air inlet through the side wall of the air inlet cover and engages with the first recess and the first protrusion.

9. The fan head according to claim 1, wherein: The air outlet cover is clamped to one end of the air outlet through a second clamping structure; The second engaging structure includes a plurality of second recessed portions recessed on the inner wall of the air outlet cover and a plurality of second raised portions protruding on the outer wall of the air outlet, and the shape and size of the second raised portions are adapted to those of the second recessed portions; When the air outlet cover is clamped to the air outlet, the second protrusion is clamped into the second recess to achieve connection.

10. The fan head according to claim 1, wherein: The open end has a clamping end formed by shrinkage, and the clamping end is clamped with the second part of the inner tube through a third engaging structure; The third engaging structure includes a plurality of third recessed portions formed on the side wall of the second portion and a plurality of third raised portions formed on the outer wall of the engaging end. When the air deflector is installed, the clamping end of the air deflector extends into the second portion and the third protrusion is clamped into the third recess to achieve connection.

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