Fan head of handheld fan

Abstract

The invention relates to the technical field of handheld fans, in particular to a handheld fan head which comprises a fan shell, the fan shell is of a long-barrel-shaped structure, an air inlet and an air outlet are formed in the two ends of the fan shell, an air flow channel is formed between the air inlet and the air outlet, and a motor and an impeller which are connected are arranged in the fan shell. When the motor drives the impeller to rotate, air supply is achieved through the air flow channel. Wherein the impeller comprises a hub, a plurality of fan blades connected to the hub and a rotating shaft connected to the hub, the rotating shaft is used for being connected with the motor, and the ratio of the diameter of a magnetic ring of the motor to the length of the fan blades is larger than or equal to 2: 1, so that the gyroscopic effect of the handheld fan is reduced. According to the handheld fan, the ratio of the diameter of the magnetic ring of the motor to the length of the fan blades is set to be larger than or equal to 2: 1, so that the gyroscopic effect of the handheld fan can be greatly reduced, and the use experience is more comfortable.

Description

[0001] Divisional application

[0002] This application is a divisional application of the application with the application number 202110298949.4 and the invention title "Base and Handheld Fan with Base" filed on March 20, 2021. Technical Field

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

[0004] Handheld fans are favored by many people because of their small size, exquisite appearance, convenient carrying, and easy use at close range. Currently, the length of handheld fans on the market is generally not less than 200 mm, and the width is generally not less than 100 mm. They still have a relatively large volume and obvious defects in terms of inconvenient handling and carrying. For example, the fan head of a handheld fan still consists of flat fully open front and rear mesh covers, which use side air intake, resulting in divergent air output and short air supply distance. Therefore, the blowing distance is short. If the motor speed is increased, obvious gyroscopic effects and relatively large noise will be brought. In addition, the fan blades inside the fan head have a large area, making the handheld feel top-heavy and uncomfortable. Moreover, the fan blades are significantly exposed, and fingers are likely to touch the fan blades and get long hair caught, posing a safety hazard during use.

[0005] Therefore, it has become an important problem to be solved in the industry to provide a handheld fan with a small size, light weight, convenient carrying, long air supply distance, high safety, and no obvious gyroscopic effect. Summary of the Invention

[0006] Based on this, in view of the above technical problems, it is necessary to provide a fan head of a handheld fan with a small size, light weight, convenient carrying, long air supply distance, high safety, and no obvious gyroscopic effect.

[0007] An embodiment of the present application provides a fan head of a handheld fan, and the fan head includes:

[0008] A fan housing, the fan housing has a long cylindrical structure and has an air inlet and an air outlet formed at both ends, and has an air flow channel between the air inlet and the air outlet. A motor and an impeller are connected inside the fan housing, so that when the motor drives the impeller to rotate, air supply is realized through the air flow channel;

[0009] Wherein, the impeller includes a hub, a plurality of fan blades connected to the hub, and a rotating shaft connected to the hub. The rotating shaft is used to connect to the motor, and the ratio of the diameter of the magnetic ring of the motor to the length of the fan blade is greater than or equal to 2:1 to reduce the gyroscopic effect of the handheld fan.

[0010] In one embodiment, the fan head further includes: fixed guide vanes, a plurality of the fixed guide vanes are spaced in the air flow path, one end of each of the fixed guide vanes extends at the air outlet, and the width of each of the fixed guide vanes gradually narrows from the inner cylinder towards the air outlet direction and is arc-shaped;

[0011] Wherein, the arc-shaped sides of each of the fixed guide vanes are spaced from the flow guide cover of the fan head, and the ratio of the length of the fan blades of the impeller to the length of each of the fixed guide vanes is less than or equal to 1:2, so as to improve the focusing effect of the air flow when the air flow rotates and flows out of the fan housing.

[0012] In one embodiment, the fan head further includes: an air inlet cover, the air inlet cover is installed at the air inlet;

[0013] Wherein, the air inlet cover has a plurality of uniformly arranged and curved air inlet guide vanes, and the bending direction of each of the air inlet guide vanes is opposite to the rotation direction of the impeller, so as to reduce the wind resistance when air enters from the air inlet cover.

[0014] In one embodiment, the fan head further includes: an inner cylinder, the inner cylinder is arranged in the fan housing and is spaced from its inner wall;

[0015] Wherein, the motor is installed on the inner cylinder and makes the impeller face the air inlet cover, so as to realize air outlet through the air flow path between the fan housings when the motor drives the impeller to rotate.

[0016] In one embodiment, a plurality of the fixed guide vanes are spaced between the inner cylinder and the inner wall of the fan housing, each of the fixed guide vanes has a sheet-like structure and its length direction extends along the axial direction of the fan housing, and one end of each of the fixed guide vanes extends at the air outlet, so as to form a drainage structure to gather the air outlet.

[0017] In one embodiment, the fan head further includes: an air outlet cover, the air outlet cover has an annular structure and is clamped at the air outlet, and the outer diameter of the air outlet cover is radially contracted, so as to form an arc transition structure with the outer wall of the fan housing.

[0018] In one embodiment, the fan head further includes: a flow guide cover, the flow guide cover is installed at the air outlet, and has a hollow structure, which is used to reduce the eddy current and noise generated at the air outlet.

[0019] In one embodiment, one end of the flow guide cover is open and the other end is sealed, the open end is connected to the inner cylinder, and the sealed end has an arc-shaped structure and is recessed into the air outlet, so as to cooperate with the air outlet cover to reduce the eddy current and noise generated at the air outlet when the fan head blows air.

[0020] In one embodiment, a partition is provided inside the inner cylinder, and the partition is used to divide the inner cylinder into a first part and a second part;

[0021] Wherein, a mounting shaft protrudes inside the first part, the motor is mounted on the mounting shaft, a plurality of recessed parts are provided on the side wall of the second part, a clamping end corresponding to the inner diameter of the second part is provided at the open end of the air guide cover, and a plurality of protruding parts that can be detachably clamped with the recessed parts are provided on the clamping end.

[0022] In one embodiment, the gap between the fan blade and the inner wall of the fan housing is less than 1.6 mm, and one end of the air outlet converges to form an air outlet end, so that the inner diameter of the air outlet is smaller than the diameter of the air flow channel, thereby increasing the air pressure at the air outlet through volume compression to increase the air supply distance.

[0023] The above-mentioned fan head for a hand-held fan, on the one hand, due to the fact that the fan housing has a long cylindrical structure, the fan blade is located inside the fan housing and far away from the air inlet and the air outlet, so it is more difficult for fingers or sundries to touch the fan blade, and it is safer and more reassuring to use. In addition, the area of the fan blade 142 of this fan head is smaller than that of the existing hand-held fans, so that the hand-held fan will not have the problem of top-heaviness when held; on the other hand, by setting the ratio of the diameter of the magnetic ring of the motor to the length of the fan blade to be greater than or equal to 2:1, which is different from the ratio of the diameter of the magnetic ring of the motor to the length of the fan blade of the traditional axial-flow hand-held fan being less than or equal to 1:3, the hand-held fan of the present invention can greatly reduce the gyroscopic effect and the use experience is more comfortable.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 below. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the drawings.

[0026] Figure 1 It is a schematic structural diagram of the hand-held fan with a base of the present invention.

[0027] Figure 2 is Figure 1 A schematic structural diagram of the hand-held fan from another angle in

[0028] Figure 3 is Figure 2 The rear view of the hand-held fan in

[0029] Figure 4 yes Figure 2 Side view of a handheld fan.

[0030] Figure 5 yes Figure 2 Cross-sectional view of the handheld fan.

[0031] Figure 6 yes Figure 2 Exploded view of the handheld fan.

[0032] Figure 7 yes Figure 2 Another exploded view of the handheld fan.

[0033] Figure 8 It is an exploded view of the fan housing and handle of the handheld fan of the present invention.

[0034] Figure 9 yes Figure 8 Cross-sectional view of the middle fan housing and the first housing.

[0035] Figure 10 yes Figure 8 Another cross-sectional view of the middle fan housing and the first housing.

[0036] Figure 11 It is a side view of the motor and impeller of the handheld fan of the present invention.

[0037] Figure 12 It is a structural schematic diagram of the first embodiment of the base of the present invention.

[0038] Figure 13 yes Figure 12 Front view of .

[0039] Figure 14 yes Figure 13 Top view of .

[0040] Figure 15 It is along Figure 14 Sectional view along line AA.

[0041] Figure 16 It is along Figure 14 Cross-sectional view along line BB.

[0042] Figure 17 yes Figure 12 Exploded diagram of .

[0043] Figure 18 yes Figure 12 Another angle of the exploded view.

[0044] Figure 19 It is a structural schematic diagram of the second embodiment of the base of the present invention.

[0045] Figure 20 is Figure 19 a sectional view of

[0046] Figure 21 Figure 1 is a schematic diagram of a usage state of the hand-held fan with a base according to the present invention.

[0047] Figure 22 is Figure 21 a sectional view of

[0048] Figure 23 Figure 2 is another schematic diagram of a usage state of the hand-held fan with a base according to the present invention. Detailed Embodiments

[0049] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals represent like elements. The present invention aims to provide a hand-held fan 1 with a base, which includes a hand-held fan 100 and a base 200. The hand-held fan 100 can be used alone by hand or inserted into the base 200 and placed on a table or a countertop for use. And when the hand-held fan 100 is inserted into the base 200 for use, the air outlet angle of the hand-held fan 100 can be adjusted conveniently and quickly, so as to have a better use experience and use effect.

[0050] In addition, the hand-held fan 100 provided by the present invention has a smaller volume compared with the existing hand-held fans. Specifically, the length L of the hand-held 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, as shown in Figure 3 - 4 Figure 3; compared with the common hand-held fans on the market at present (the length is generally not less than 200 mm and the width is generally not less than 100 mm), the hand-held fan 100 of the present invention is more compact in size, lighter in weight and more convenient to carry.

[0051] It should be noted that for the hand-held fan 1 with a base of the present invention, the size of the hand-held fan 100 is not limited to the above numerical range. Of course, its size range can be set otherwise according to needs. And for hand-held fans 100 of any other sizes, the air outlet angle can be adjusted in cooperation with the corresponding base 200.

[0052] Next, with reference to Figures 1 - 23 Figure 3, the structures of the hand-held fan 100 and the base 200 in the present invention will be described in detail.

[0053] First, with reference to Figures 1 - 5As shown in the figure, 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 source 150, and a control component 160. Among them, the fan head 110 is integrally in a long cylindrical structure, and air inlets 1111 and air outlets 1112 are formed at both ends. The motor 130 and the impeller 140 are installed inside the fan head 110 and are connected. The motor 130 is used to drive the impeller 140 to rotate. The impeller 140 faces the air inlet 1111, and there is a certain distance between the impeller 140 and both the air inlet 1111 and the air outlet 1112. That is, the impeller 140 is housed inside the long cylindrical fan head 110 without being exposed. During use, it is difficult for fingers or sundries to contact the fan blades, making it safer and more reassuring to use. The upper end of the handle 120 is connected to approximately the middle of the fan head 110, and the lower end of the handle 120 forms a plug-in end adapted to the base (details will be described later); the power source 150 and the control component 160 are respectively arranged inside the handle 120 and are electrically connected to the motor 130.

[0054] As shown in the following in conjunction with Figures 5 - 7 and Figure 11 In the present invention, the impeller 140 includes a hub 141, a plurality of fan blades 142 connected to the hub 141, and a rotating shaft 143 connected to the hub 141 (see Figure 6 ). The rotating shaft 143 is used to connect to the motor 130. Since the overall volume of the handheld fan 100 of the present invention and the volume of the fan head 110 are reduced compared with existing handheld fans, the area of the fan blades 142 is correspondingly reduced, so that the handheld fan 100 will not have the problem of top-heaviness when held. At the same time, in the present invention, a high-speed DC brushless outer rotor motor is adopted, specifically, a motor 130 with a speed reaching 4,000 to 10,000 revolutions per minute is used, thereby improving the air volume and air pressure to achieve the purpose of increasing the air supply distance.

[0055] Continuing to refer to Figure 11 As shown in the figure, in the present invention, the ratio of the diameter D3 (including the housing) of the magnetic ring of the motor 130 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 magnetic ring (including the housing) of the motor of the traditional axial-flow handheld fan to the length of the fan blade, which is less than or equal to 1:3. This enables the handheld fan 100 of the present invention to significantly reduce the gyroscopic effect.

[0056] Referring to Figure 5 As shown in the figure, in the present invention, the gap between the fan blade 142 and the inner wall of the fan housing 111 (details will be described later) of the fan head 110 is less than 1.6 mm. Combining with the high speed of the motor 13, ultra-high air pressure is achieved, so the air supply distance is farther.

[0057] Continuing to refer to Figures 5 - 7, the fan head 110 includes a fan housing 111, fixed guide vanes 112, a flow guide cover 113, an air inlet cover 114, and an air outlet cover 115. Among them, the fan housing 111 has a long cylindrical structure, and the air inlet 1111 and the air outlet 1112 are respectively formed at both ends. The air inlet cover 114 is installed at the air inlet 1111, and the air outlet cover 115 is snap-fitted to one end of the air outlet 1112. An inner cylinder 116 spaced from the inner wall is further provided inside the fan housing 111, and the motor 130 is installed in the inner cylinder 116. The long cylindrical structure of the fan housing 111 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 sundries to touch the fan blades 142, and making the use safer and more reassuring. A plurality of fixed guide vanes 112 are radially spaced 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 drainage structure formed by the fixed guide vanes 112 can make the air outlet converge, thereby increasing the air pressure and wind speed and making the air supply distance farther. The flow guide cover 113 has a hollow structure with one end open and the other end sealed. The open end of the flow guide cover 113 is connected to the inner cylinder 116, and the sealed end of the flow guide cover 113 is located at the air outlet 1112 and has an arc-shaped structure. The setting of the flow guide cover 113 can not only isolate the internal noise generated during the operation of the fan 100 to achieve the effect of noise reduction, but also has the function of reducing eddy currents, and at the same time makes the appearance of the handheld fan 100 more beautiful.

[0058] Continuing to combine Figure 3 , Figures 5 - 7 As shown, the air inlet cover 114 has a plurality of uniformly arranged and curved air inlet guide vanes 1141, and the bending direction of each air inlet guide vane 1141 is opposite to the rotation direction of the impeller 140. Refer to Figure 3 , the setting of the air inlet guide vanes 1141 makes the air resistance smaller and the air inlet smoother. Of course, the air inlet cover 114 is not limited to the structural setting of the air inlet guide vanes 1141. For example, in other embodiments, the air inlet cover 114 can be set in a grid shape, a honeycomb shape, or other shapes.

[0059] In the present invention, the air inlet cover 114 and the fan housing 111 are snap-fitted through a first snap-fitting structure. Specifically, the first snap-fitting structure includes a plurality of first recessed portions 1142 recessed on the side wall of the air inlet cover 114 (refer to Figure 6 shown) and a plurality of first protruding portions 1113 protruding on the inner wall of the fan housing 111 (refer to Figure 8As shown, the shape and size of the first protrusion 1113 are adapted to the first recess 1142. Among them, the first recess 1142 can be a groove or a through-hole, etc., and the first protrusion 1113 can be a bump, a rib, etc. When the air inlet cover 114 is installed, its side wall extends into one end of the air inlet 1111 of the fan housing 111 and makes the first recess 1142 thereon engage with the first protrusion 1113. Understandably, the installation positions of the first protrusion 1113 and the first recess 1142 can be interchanged.

[0060] Next, in conjunction with Figures 5 - 11 shown, further, one end of the air outlet 1112 of the fan housing 111 converges 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 passage formed in the fan housing 111 (see Figure 9 ), thereby increasing the air pressure through volume compression, and the volume compression is at one end of the axial air outlet 1112, which is more conducive to the aggregation of air flow, thereby increasing the air supply distance.

[0061] In addition, the air outlet cover 115 has an annular structure, and the air outlet cover 115 is engaged with the air outlet end through a second engaging structure, and an arc transition is formed between the air outlet cover 115 and the outer wall of the fan housing 111, as Figure 5 shown. Specifically, the second engaging structure includes a plurality of second recesses 1151 recessed in the inner wall of the air outlet cover 115 (as Figure 7 shown) and a plurality of second protrusions 1114 protruding from the outer wall of the air outlet end (as Figure 8 shown). The shape and size of the second protrusion 1114 are adapted to the second recess 1151. Among them, the second recess 1151 can be a groove or a through-hole, etc., and the second protrusion 1114 can be a bump, a rib, etc. When the air outlet cover 115 is engaged with the air outlet end, the second protrusion 1114 is engaged in the second recess 1151 to achieve connection. Of course, the installation positions of the second protrusion 1114 and the second recess 1151 can be interchanged.

[0062] Continuing to combine with Figures 5 - 6 、 Figures 9 - 10 shown, each fixed guide vane 112 has a flat sheet-like structure and its length direction extends along the axial direction of the fan housing 111. The width of the fixed guide vane 112 gradually narrows from the inner cylinder 116 towards the air outlet 1112 and is arc-shaped. The arc edge 1121 of the fixed guide vane 112 is slightly spaced from the flow guide cover 113. In the present invention, the ratio of the length L1 of the fan blade 142 to the length of the fixed guide vane 112 is less than or equal to 1:2. Therefore, when the air flow rotates and flows out of the fan housing 111, an effective viscosity is formed, greatly improving the focusing effect of the air flow and achieving a super-long blowing distance.

[0063] Continuing to combine with Figures 5 - 7 、 Figures 9 - 10As shown, a partition plate 1161 is further provided inside the inner cylinder 116. The partition plate 1161 divides the inner cylinder 116 into a first part 116a and a second part 116b. Among them, a mounting shaft 1162 protrudes inside the first part 116a. The mounting shaft 1162 is integrally formed with the partition plate 1161 specifically, and the motor 130 is mounted on the mounting shaft 1162. The flow guide cover 113 is mounted on the second part 116b.

[0064] Specifically, the open end of the flow guide cover 113 has a clamped end formed by contraction. The outer diameter of the clamped end corresponds to the inner diameter of the second part 116b, and the clamped end and the second part 116b are clamped through a third engaging structure. Specifically, the third engaging structure includes a plurality of third recessed portions 1163 (see Figures 9 - 10 ) opened on the side wall of the second part 116b and a plurality of third protruding portions 1131 (see Figure 7 ) protruding on the outer wall of the clamped end. In this embodiment, the third recessed portion 1163 is a through hole. Of course, it is not limited to this. It is also feasible to start it as a groove. The third protruding portion 1131 is a convex block adapted to the aforementioned through hole. Of course, it can also be set as a convex rib, etc., as long as it can be firmly clamped with the third recessed portion 1163. When installing the flow guide cover 113, the clamped end of the flow guide cover 113 extends into the second part 116b and the third protruding portion 1131 is clamped into the third recessed portion 1163 to achieve connection. See Figure 5 shown.

[0065] Refer to again Figures 5 - 7 、 ​ shown, a hollow connection column 117 is further provided inside the fan head 110. One end of the connection column 117 protrudes radially outward to form an abutting portion 1171. An installation hole 1115 communicating with the inside of the handle 120 is opened on the fan housing 111. The connection column 117 passes through the installation hole 1115, and the abutting portion 1171 abuts against the outer wall of the fan housing 111. The other end of the connection column 117 protrudes into the first part 116a of the inner cylinder 116. See ​ . By using the connection column 117 for wiring, the wires are prevented from being exposed, ensuring the safety and beauty of the hand-held fan 100.

[0066] Combined with ​ shown, in the present invention, the inserted end 120a formed at the lower end of the handle 120 is hemispherical. When the inserted end 120a of the handle is inserted into the base 200, it can rotate 360° along the base 200, making the use of the hand-held fan 100 more convenient. Moreover, through the cooperation of the inserted end 120a and the base 200, the air outlet angle of the hand-held fan 100 can be adjusted (details will be described later).

[0067] Combined with ​As shown, in the present invention, the handle 120 includes a first housing 121 and a second housing 122 that are detachably snapped together. 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, it is not limited to this forming method. Connecting them together after separate forming does not affect the realization of their functions. After the second housing 122 is connected to the first housing 121, a first accommodation space is defined between the first housing 121 and the second housing 122. The power supply 150 and the control component 160 are both accommodated in the first accommodation space.

[0068] More specifically, the first housing 121 and the second housing 122 are snapped together through a fourth snap structure. The fourth snap structure includes a fourth recess and a fourth protrusion. Moreover, one of the first housing 121 and the second housing 122 further protrudes with a snap piece. The fourth recess is opened on the snap piece, and the fourth protrusion is provided on the other of the first housing 121 and the second housing 122 and is matched with the fourth recess. Through the detachable snap connection between the fourth protrusion and the fourth recess, the detachable connection between the first housing 121 and the second housing 122 is realized.

[0069] Continuing to refer to ​ As shown, in one embodiment, a key hole 1211 communicating with its interior is opened on the first housing 121, and a plurality of snap pieces 1212 protrude from the edge of the side wall of the first housing 121. A fourth recess 1213 is opened on the snap piece 1212. The fourth recess 1213 is specifically a snap hole, but it is not limited to this. Correspondingly, a charging hole 1221 communicating with its interior is opened on the second housing 122. At the same time, a groove 1222 is provided on the inner wall of the second housing 122. The shape and size of the groove 1222 correspond to the snap piece 1212. A fourth protrusion 1223 is provided in the groove 1222. The fourth protrusion 1223 is preferably a protrusion. When the first housing 121 and the second housing 122 are snapped together, the snap piece 1212 extends into the groove 1222 and the fourth protrusion 1223 is snapped into the fourth recess 1213 to achieve connection.

[0070] Referring again to ​ As shown, the control component 160 includes a key 161, a first charging interface 162, and a circuit board 163. The control component 160 is installed in the handle 120. The key 161 protrudes into the key hole 1211, and the first charging interface 162 protrudes into the charging hole 1221. The power supply 150 is accommodated in the handle 120 at the lower end of the handle 120. The power supply 150 is used to supply power to the circuit board 163 and the motor 130. Among them, the principles and setting methods of the power supply 150 and the control component 160 are conventional setting methods well known to those of ordinary skill in the art, so no further details will be given.

[0071] Referring again to​ As shown, more preferably, a first charging structure 170 for charging the power source is further provided at the bottom of the handle 120. A through hole (not labeled) is formed at the bottom of the insertion end 120a, and the first charging structure 170 is disposed 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. Among them, the first metal sheet 171 is circular ring-shaped, the second metal sheet 172 is circular, the first metal sheet 171 is installed in the aforementioned through hole, the second metal sheet 172 is inserted through the first metal sheet 171 and is insulated from it, and the first metal sheet 171 and the second metal sheet 172 are respectively electrically connected to the power source 150. After the handle 120 is inserted into the base 200, the first metal sheet 171 and the second metal sheet 172 can be in contact conduction with the charging spring pins 242 (see the following description) on the base 200, so as to charge the power source 150 through the base 200, and it can be ensured that the handle 120 rotates 360° in the base 200 without interference, making the usage mode of the handheld fan 100 more diversified and more convenient.

[0072] It can be understood that the first metal sheet 171 and the second metal sheet 172 are not limited to the above-mentioned nested structure. As long as it is ensured that the two can be in contact with the charging spring pins 242 on the base 200 and the contact surfaces of the two are continuous planes, the charging and free rotation of the handheld fan 100 can be realized.

[0073] Combined with the above description, it can be seen that for the handheld fan 100 of the present invention, it can be charged through the first charging interface 162 on the handle 120, or it can be charged in cooperation with the base 200 through the first charging structure 170 at the bottom of the handle 120, and the usage mode is more diverse and more convenient.

[0074] The following will be combined with ​ As shown, different embodiments of the base 200 of the present invention will be described separately.

[0075] First, refer to ​ As shown, in the first embodiment of the base 200 of the present invention, an insertion slot 210 formed by downward depression is provided on the base 200. The insertion slot 210 includes a first insertion portion 211 located below and a second insertion portion 212 located above. Refer to ​ As shown. Among them, the first insertion portion 211 is hemispherical and is adapted to the insertion end 120a of the handle 120, and the first insertion portion 211 is inclined. Specifically, the center line P2 of the first insertion portion 211 forms a second included angle a2 with the vertical direction, that is, there is a second included angle a2 between the center line P2 of the first insertion portion 211 and the center line P1 of the base 200. The second included angle a2 can be flexibly set as needed but should not be too large to prevent the handle from tilting along the first abutting surface 2121 after being inserted into the base 200.

[0076] As ​ shown, the second insertion portion 212 is formed by gradually expanding upward from the upper end of the first insertion portion 211, and the second insertion portion 212 has opposite first abutting surface 2121 and second abutting surface 2122. The height of the first abutting surface 2121 is greater than the height of the second abutting surface 2122. That is, the distance from the top of the first abutting surface 2121 to the top of its connection with the first insertion portion 211 is greater than the distance from the top of the second abutting surface 2122 to the top of its connection with the first insertion portion 211. Moreover, the first abutting surface 2121 is inclined relative to the vertical direction and has a first included angle a1. Specifically, the first abutting surface 2121 is gradually inclined from its bottom to the top and away from the center line P1 of the base 200. The first included 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 after being inserted into the base 200. In the present invention, the first included angle a1 and the second included angle a2 are substantially the same and preferably between 5° and 15°, although it is not limited to the above angles.

[0077] In a specific embodiment of the present invention, both the first included angle a1 and the second included angle a2 are set to 7.5°. In this way, both the stability of the handle 120 after being inserted into the base 200 can be ensured, and the adjustment of the air outlet angle of the handheld fan 100 can be realized.

[0078] In addition, in this specific embodiment, the second abutting surface 2122 is slightly inclined outward relative to the vertical direction or extends substantially along the vertical direction, but it is not limited to the setting method here. For example, in other embodiments, the second abutting surface 2122 can also be inclined relative to the vertical direction and close to the first abutting surface 2121 or away from the second abutting surface 2122. That is, the second abutting surface 2122 is inclined towards the direction where the first abutting surface 2121 is located or away from the first abutting surface 2121.

[0079] As ​ shown, furthermore, an arc-shaped guiding portion 213 is formed between the top of the outer wall of the base 200 and the top of the second insertion portion 212. The guiding portion 213 is formed by gradually expanding upward and outward from the top of the second insertion portion 212. Through the setting of the arc-shaped guiding portion 213, it is easier for the handheld fan to be inserted into the insertion slot 210 from any angle, thereby increasing the convenience of use.

[0080] Combined with ​ 、 ​As shown, when the handheld fan 100 is plugged into the base 200, the plugging end 120a of the handle 120 is received in the first plugging portion 211 of the plugging slot 210. At the same time, the first housing 121 or the second housing 122 of the handle 120 abuts against the first abutting surface 2121 of the second plugging portion 212. That is, 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 causing the handheld fan 100 to tilt forward or backward by 7.5°, so that the air outlet direction has an angle adjustment range of about 7.5 degrees up and down.

[0081] Specifically refer to ​ As shown, it shows a schematic diagram of the handheld fan 100 being plugged into the base 200 in the forward direction. That is, the plugging end 120a of the handle 120 is received in the first plugging portion 211, and the second housing 122 of the handle 120 abuts against the first abutting surface 2121 of the second plugging portion 212, causing the handheld fan 100 to tilt backward by 7.5 degrees. At the same time, the plugging end 120a of the handle 120 can prevent the handheld fan 100 from tipping backward under the abutment of the first plugging portion 211, so that the air outlet direction F of the handheld fan 100 is inclined upward with respect to the horizontal direction. Similarly, the state when the handheld fan 100 is plugged into the base 200 in the reverse direction can be referred to ​ As shown, at this time, the first housing 121 of the handle 120 abuts against the first abutting surface 2121 of the second plugging portion 212, so that the air outlet of the handheld fan 100 is inclined downward, that is, the air outlet direction F of the handheld fan 100 is inclined downward with respect to the horizontal direction.

[0082] Combined again with ​ As shown, in the present invention, the overall shape of the base 200 is not specifically limited, and its shape can be flexibly set to make the base 200 have a good appearance.

[0083] Refer to ​ As shown, in this embodiment, the base 200 includes an upper housing 220 and a lower housing 230 that are snap-connected; wherein, the plugging slot 210 is formed in the upper housing 220, and the lower housing 230 is used to support on a tabletop or a countertop. Specifically, the upper housing 220 has an outer side wall 221 and an inner side wall that are spaced apart. The inner side wall is the side wall of the plugging slot 210. The top of the outer side wall 221 of the upper housing 220 and the top of the inner side wall are arc-transitioned to form the guiding portion 213. At the same time, the outer side wall 221 of the upper housing 220 has an outwardly convex arc structure. The outer side wall 221 can be in a regular shape or an irregular shape. This structural setting of the upper housing 220 makes the shape of the base 200 more beautiful.

[0084] In this embodiment, the lower housing 230 includes a bottom plate 231 and side plates 232 connected to the bottom plate 231. The outer diameter of the side plates 232 corresponds to the inner diameter of the upper housing 220. The bottom plate 231 has a planar structure, which can ensure that the base 200 can be stably placed on a table or a countertop. When the upper housing 220 and the lower housing 230 are installed, the side plates 232 of the lower housing 230 extend into the upper housing 220, and the upper housing 220 and the lower housing 230 are fixedly connected by screws. Of course, the upper housing 220 and the lower housing 220 can also be connected in other ways. For example, they can be snap-fitted through a matching recess and a protrusion.

[0085] More preferably, anti-slip feet 233 can be further provided on the bottom plate 231 of the lower housing 230. Through the arrangement of the feet 233, the base 200 can be placed more stably on a table or a countertop.

[0086] Referring again to ​ As shown, a second charging structure 240 can be further provided in the base 200. The second charging structure 240 is used to charge the hand-held fan 100 plugged into the base 200. Specifically, the second charging structure 240 includes a charging circuit board 241, charging spring pins 242, and a second charging interface 243. The charging spring pins 242 are connected to the charging circuit board 241, and the diameter of the charging spring pins 242 is less than 1 mm and has a telescopic amount of 3 mm. Of course, the diameter and the telescopic amount of the charging spring pins 242 are not limited to this. The charging spring pins 242 protrude into the aforementioned plug-in slot 210 and form a second included angle a2 with the vertical direction, that is, the charging spring pins 242 also form a 7.5° angle with the vertical direction (or with the center line P1 of the base 200). In this way, when the handle 120 of the hand-held 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 to turn on the charging circuit. Therefore, the hand-held fan 100 is charged through the base 200 connected to an external power supply.

[0087] In this embodiment, a second accommodation space is formed between the upper housing 220 and the lower housing 230 of the base 2, and a through hole (not labeled, refer to ​ ) communicating the second accommodation space and the plug-in slot 210 is provided at the bottom of the upper housing 220. The charging circuit board 241 is fixed in the second accommodation space and forms a 7.5° angle with the horizontal direction, so that the charging spring pins 242 pass through the through hole and protrude into the plug-in slot 210 and form a 7.5° angle with the vertical direction. At the same time, a through hole is also provided on the outer side wall 221 of the upper housing 220, and the second charging interface 243 is installed in the through hole and electrically connected to the charging circuit board 24,1.

[0088] 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.

[0089] See ​ 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.

[0090] 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. ​ 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.

[0091] In summary, for the hand-held fan 1 with a base according to the present invention, firstly, since the insertion slot 210 provided on the base 200 has a first insertion portion 211 in the shape of a hemisphere and a second insertion portion 212 that gradually expands upward, and the second insertion portion 212 has opposite first abutting surface 2121 and second abutting surface 2122, and the first abutting surface 2121 is inclined relative to the vertical direction and has a first included angle a1. Therefore, when the handle 120 is inserted into the insertion slot 210, the handle 120 abuts against the first abutting surface 2121 of the second insertion portion 212 and is inclined relative to the vertical direction, so that the air outlet direction of the hand-held fan 100 also forms an included angle relative to the horizontal direction. That is, the air outlet direction of the hand-held fan 100 can be adjusted upward or downward, thereby realizing the 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 hand-held 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. Therefore, the air pressure can be increased by volume compression, and the volume compression is at one end of the air outlet 1112, which is more conducive to the aggregation of air flow, thereby increasing the blowing distance; in addition, a flow guide cover 113 with a hollow structure is provided at the air outlet 1112, and the sealed end of the flow guide cover 113 is located at the air outlet 1112 and has an arc-shaped structure. The flow guide cover 113 can greatly reduce the eddy current and noise, so that the fan has no obvious gyroscopic effect and the use experience is more comfortable; furthermore, the fan housing 111 has a long cylindrical structure, so that the fan blade 142 is located inside the fan housing 111 and is far from the air inlet 1111 and the air outlet 1112. Therefore, it is more difficult for fingers or sundries to touch the fan blade 142, and the use is safer and more reassuring; finally, the overall size of the hand-held fan 100 is reduced, the weight is light, the grip feeling is better, and it is more convenient to carry.

[0092] Other structural parts related to the hand-held fan 1 with a base according to the present invention are all conventional structures well known to those of ordinary skill in the art, and will not be described in detail herein.

[0093] The foregoing disclosures are only preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A fan head of a hand-held fan, characterized in that, The fan head includes: A fan housing, which is in the shape of a long cylinder with an air inlet and an air outlet formed at both ends, having an air flow path between the air inlet and the air outlet, and a motor and an impeller connected to each other inside the fan housing, so that when the motor drives the impeller to rotate, air is blown through the air flow path; Among them, the impeller includes a hub, a plurality of fan blades connected to the hub, and a rotating shaft connected to the hub, the rotating shaft is used to connect to the motor, and the ratio of the diameter of the magnetic ring of the motor to the length of the fan blade is greater than or equal to 2:1 to reduce the gyroscopic effect of the hand-held fan.

2. The fan head of the hand-held fan according to claim 1, characterized in that, The gap between the fan blade and the inner wall of the fan housing is less than 1.6 mm, and one end of the air outlet is converged to form an air outlet end, so that the inner diameter of the air outlet is smaller than the diameter of the air flow path, thereby increasing the air pressure at the air outlet by volume compression to increase the air supply distance.

3. The fan head of the hand-held fan according to claim 2, characterized in that, The fan head further includes: fixed guide vanes, a plurality of the fixed guide vanes are arranged at intervals in the air flow path, one end of each of the fixed guide vanes extends to the air outlet, and the width of each of the fixed guide vanes gradually narrows and is arc-shaped from the inner cylinder to the air outlet direction; Among them, the arc-shaped edge of each of the fixed guide vanes is spaced from the flow guide cover of the fan head, and the ratio of the length of the fan blade of the impeller to the length of each of the fixed guide vanes is less than or equal to 1:2 to enhance the focusing effect of the air flow when the air flow rotates and flows out of the fan housing.

4. The fan head of the handheld fan according to claim 1, characterized in that, The fan head further includes: an air inlet cover, which is installed at the air inlet; Among them, the air inlet cover has a plurality of evenly arranged and curved air inlet guide vanes, and the bending direction of each of the air inlet guide vanes is opposite to the rotation direction of the impeller to reduce the wind resistance when air enters from the air inlet cover.

5. The fan head of the hand-held fan according to claim 4, characterized in that, The fan head further includes: an inner cylinder, which is arranged inside the fan housing and is spaced from its inner wall; Among them, the motor is installed on the inner cylinder and the impeller is aligned with the air inlet cover, so that when the motor drives the impeller to rotate, air is discharged through the air flow path between the fan housings.

6. The fan head of the hand-held fan according to claim 5, characterized in that, A plurality of the fixed guide vanes are arranged at intervals between the inner cylinder and the inner wall of the fan housing, each of the fixed guide vanes is in a sheet structure and its length direction extends along the axial direction of the fan housing, and one end of each of the fixed guide vanes extends to the air outlet to form a drainage structure to gather the air outlet.

7. The fan head of the hand-held fan according to claim 6, characterized in that, The fan head further includes: an air outlet cover, which is in a ring structure and is clamped at the air outlet, and the outer diameter of the air outlet cover is radially contracted to form an arc-shaped transition structure with the outer wall of the fan housing.

8. The fan head of the handheld fan according to claim 7, characterized in that, The fan head further includes: a flow guide cover, which is installed at the air outlet and is in a hollow structure, used to reduce the eddy current and noise generated at the air outlet.

9. The fan head of the hand-held fan according to claim 8, wherein, One end of the flow guide cover is open and the other end is sealed, the open end is connected to the inner cylinder, and the sealed end is in an arc-shaped structure and is recessed into the air outlet, so that when the fan head discharges air, it cooperates with the air outlet cover to reduce the eddy current and noise generated at the air outlet.

10. The fan head of the hand-held fan according to claim 9, characterized in that, A partition is provided inside the inner cylinder, and the partition is used to divide the inner cylinder into a first part and a second part; Wherein, a mounting shaft is convexly provided in the first part, the motor is mounted on the mounting shaft, a plurality of recessed parts are provided on the side wall of the second part, a clamping end corresponding to the inner diameter of the second part is provided at the open end of the flow guide cover, and a plurality of protruding parts that can be detachably clamped with the recessed parts are provided on the clamping end.

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