Fan head

Abstract

The invention relates to the technical field of fans, and particularly discloses a fan head which comprises a fan shell, an impeller and a fixed guide vane. An air outlet is formed in one end of the fan shell, an inner barrel is arranged in the fan shell, and the inner barrel and the inner wall of the fan shell are spaced. The impeller is mounted in the fan shell; the multiple fixed guide vanes are arranged between the inner cylinder and the fan shell at intervals in the radial direction. Wherein the inner cylinder comprises a first part, the first part is of an opening structure, the opening structure faces the impeller, a mounting shaft is arranged in the first part in a protruding mode, the mounting shaft extends in the direction of the impeller, the mounting shaft is used for mounting a motor, and the motor is used for driving the impeller to rotate. The first part is arranged to be of the opening structure, the mounting shaft for mounting the motor is arranged in the opening structure in a protruding mode, the impeller can be driven, miniaturization can be achieved, noise can be reduced, meanwhile, the opening structure enables the side wall of the inner cylinder to extend towards the impeller, and air pressure is increased.

Description

[0001] Divisional application

[0002] The present application is a divisional application of

Application Number: 202110298949.4

Invention Name: Base and handheld fan with base

[0003] Embodiments of the present application relate to the fan technical field, in particular to a fan head. BACKGROUND

[0004] The fan head of the handheld fan on the market still has a large volume, and the motor speed is low, the wind pressure is insufficient, which leads to the outflow of the air flow and the short distance of the air supply, so the blowing distance is short. If the motor speed is increased, it will bring obvious noise. SUMMARY

[0005] Therefore, it is necessary to provide a fan head with small size, large wind pressure and low noise in view of the above technical problems.

[0006] Embodiments of the present application provide a fan head, comprising:

[0007] A fan shell, one end of the fan shell is formed with an air outlet, an inner cylinder is arranged in the fan shell, and the inner cylinder is spaced from the inner wall of the fan shell;

[0008] An impeller is installed in the fan shell;

[0009] A plurality of fixed vanes are arranged radially and spaced between the inner cylinder and the fan shell;

[0010] The inner cylinder comprises a first part, the first part is an open structure, the open structure faces the impeller, an installation shaft is convexly arranged in the first part, the installation shaft extends towards the direction of the impeller, the installation shaft is used for installing a motor, and the motor is used for driving the impeller to rotate.

[0011] In one embodiment, the first part includes a side wall of the inner cylinder, and the first part further includes a partition plate, and the side wall and the partition plate form the open structure.

[0012] In one embodiment, the open structure is spaced from the impeller.

[0013] In one embodiment, the fan head further comprises a flow guide cover, the inner cylinder comprises a second part, the second part is connected with the first part, and the flow guide cover is installed on the second part.

[0014] In one embodiment, one end of the fixed guide vane extends to the air outlet, and the width of the fixed guide vane gradually narrows from the inner tube toward the air outlet. The fixed guide vane forms a drainage structure to gather the outgoing air and increase the air supply distance. The guide cover and one end of the fixed guide vane are arranged adjacent to each other.

[0015] In one embodiment, the fixed guide vanes include a first part and a second part connected to the first part, the first part includes two side walls arranged opposite to each other, the two side walls are respectively provided on the inner wall of the inner cylinder and the inner wall of the fan casing, one end of the second part extends to the air outlet, and the width of the second part gradually narrows from the inner cylinder toward the air outlet.

[0016] In one embodiment, the second portion is disposed adjacent to the air guide cover.

[0017] In one embodiment, the side wall of the fixed guide vane away from the inner wall of the fan housing is arc-shaped.

[0018] In one embodiment, one end of the air deflector is open and is an open end, and the open end is installed on the second part.

[0019] In one embodiment, the open end has a clamping end formed by shrinkage, and the clamping end is clamped to the second portion of the inner tube via a third clamping structure;

[0020] 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.

[0021] 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.

[0022] The fan head provided in an embodiment of the present application includes a fan housing, an impeller, and fixed guide vanes; wherein an air outlet is formed at one end of the fan housing, an inner cylinder is provided within the fan housing, and the inner cylinder is spaced apart from the inner wall of the fan housing; the impeller is mounted within the fan housing; a plurality of fixed guide vanes are radially spaced apart between the inner cylinder and the fan housing; wherein the inner cylinder includes a first portion, the first portion being an open structure, the opening structure facing the impeller, a mounting shaft protruding from the first portion, the mounting shaft extending toward the impeller, the mounting shaft being used to mount a motor, and the motor being used to drive the impeller to rotate. By configuring the first portion as an open structure with a mounting shaft protruding from the opening structure for mounting the motor, the present invention can drive the impeller while achieving miniaturization and reducing noise. At the same time, the opening structure causes the side wall of the inner cylinder to extend toward the impeller, thereby increasing wind pressure.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a handheld fan with a base according to the present invention.

[0026] Figure 2 yes Figure 1 Schematic diagram of the structure of the handheld fan from another angle.

[0027] Figure 3 yes Figure 2 Rear view of a handheld fan.

[0028] Figure 4 yes Figure 2 Side view of a handheld fan.

[0029] Figure 5 yes Figure 2 Cross-sectional view of the handheld fan.

[0030] Figure 6 yes Figure 2 Exploded view of the handheld fan.

[0031] Figure 7 yes Figure 2 Another exploded view of the handheld fan.

[0032] Figure 8 It is an exploded view of the fan housing and handle of the handheld fan of the present invention.

[0033] Figure 9 yes Figure 8 Cross-sectional view of the middle fan housing and the first housing.

[0034] Figure 10 yes Figure 8 Another cross-sectional view of the middle fan housing and the first housing.

[0035] Figure 11 It is a side view of the motor and impeller of the handheld fan of the present invention.

[0036] Figure 12 It is a structural schematic diagram of the first embodiment of the base of the present invention.

[0037] Figure 13 yes Figure 12 Front view of .

[0038] Figure 14 yes Figure 13 Top view of .

[0039] Figure 15 It is along Figure 14 Sectional view along line AA.

[0040] Figure 16 It is along Figure 14 Cross-sectional view along line BB.

[0041] Figure 17 yes Figure 12 Exploded diagram of .

[0042] Figure 18 yes Figure 12 Another angle of the exploded view.

[0043] Figure 19 It is a structural schematic diagram of the second embodiment of the base of the present invention.

[0044] Figure 20 yes Figure 19 sectional view of .

[0045] Figure 21 The present invention is a schematic diagram of a handheld fan with a base in use.

[0046] Figure 22 yes Figure 21 sectional view of .

[0047] 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

[0048] 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.

[0049] 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 3-4As 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Continue to read Figure 11As 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.

[0055] 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.

[0056] Continue to read Figure 5-Figure 7 The 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.

[0057] 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.

[0058] In the present application, the air inlet cover 114 and the fan shell 111 are connected by a first clamping structure. Specifically, the first clamping structure includes a plurality of first recesses 1142 (see Figure 6 ) provided on the side wall of the air inlet cover 114 and a plurality of first protrusions 1113 (see Figure 8 ) provided on the inner wall of the fan shell 111, the shape and size of the first protrusions 1113 being matched with the first recesses 1142, wherein the first recesses 1142 can be grooves or through holes, and the first protrusions 1113 can be protrusions or ribs. When the air inlet cover 114 is installed, the side wall thereof extends into the air inlet 1111 end of the fan shell 111 and the first recesses 1142 thereon are clamped with the first protrusions 1113. Understandably, the positions of the first protrusions 1113 and the first recesses 1142 can be interchanged.

[0059] Further, as shown in Figure 5-11 , the air outlet 1112 end of the fan shell 111 is gathered 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 shell 111 (see Figure 9 ). Thus, the wind pressure is increased by volume compression, and the volume compression is at the axial air outlet 1112 end, which is more conducive to air flow aggregation, thereby increasing the air supply distance.

[0060] In addition, the air outlet cover 115 has a ring structure, and the air outlet cover 115 and the air outlet end are connected by a second clamping structure, and the air outlet cover 115 and the outer wall of the fan shell 111 form an arc transition, as shown in Figure 5 . Specifically, the second clamping structure includes a plurality of second recesses 1151 (see Figure 7 ) provided on the inner wall of the air outlet cover 115 and a plurality of second protrusions 1114 (see Figure 8 ) provided on the outer wall of the air outlet end, the shape and size of the second protrusions 1114 being matched with the second recesses 1151, wherein the second recesses 1151 can be grooves or through holes, and the second protrusions 1114 can be protrusions or ribs. When the air outlet cover 115 is clamped to the air outlet end, the second protrusions 1114 are clamped in the second recesses 1151 to achieve connection. Of course, the positions of the second protrusions 1114 and the second recesses 1151 can be interchanged.

[0061] Continuing to combine Figure 5-Figure 6 , Figure 9-10As shown in the drawings, each fixed guide vane 112 is in a flat sheet structure and extends along the axial direction of the fan shell 111, the width of the fixed guide vane 112 gradually narrows in the direction from the inner cylinder 116 to the air outlet 1112 and is arc-shaped, and the arc-shaped side 1121 of the fixed guide vane 112 is slightly spaced from the flow guide cover 113. In the present application, 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, so that the airflow forms effective viscosity when rotating out of the fan shell 111, greatly improving the focusing effect of the airflow and achieving an ultra-long blowing distance.

[0062] Continuously combined Figure 5-Figure 7 、 Figure 9-10 As shown in the drawings, the inner cylinder 116 is further provided with a partition plate 1161, which divides the inner cylinder 116 into a first part 116a and a second part 116b. The first part 116a is provided with a mounting shaft 1162, which is integrally formed with the partition plate 1161, and the motor 130 is mounted on the mounting shaft 1162. The flow guide cover 113 is mounted on the second part 116b.

[0063] Specifically, the opening end of the flow guide cover 113 has a shrinkage formed clamping end, the outer diameter of the clamping end corresponds to the inner diameter of the second part 116b, and the clamping end and the second part 116b are clamped by a third clamping structure. Specifically, the third clamping structure includes a plurality of third recesses 1163 (see Figure 9-10 ) provided on the side wall of the second part 116b and a plurality of third protrusions 1131 (see Figure 7 ) provided on the outer wall of the clamping end. In the present embodiment, the third recesses 1163 are through holes, but are not limited thereto, and can also be grooves. The third protrusions 1131 are protrusions matched with the through holes, and can also be ribs, as long as they can be stably clamped with the third recesses 1163. When the flow guide cover 113 is installed, the clamping end of the flow guide cover 113 extends into the second part 116b and the third protrusions 1131 are clamped into the third recesses 1163 to achieve connection, as shown in Figure 5 .

[0064] Again referring to Figure 5-Figure 7 、 Figure 9 As shown in the drawings, the fan head 110 is further provided with a hollow connecting column 117, one end of the connecting column 117 protrudes outward along the radial direction to form an abutting portion 1171. The fan shell 111 is provided with a mounting hole 1115 communicating with the inside of the handle 120, the connecting column 117 is arranged in the mounting hole 1115, and the abutting portion 1171 abuts against the outer wall of the fan shell 111. The other end of the connecting column 117 protrudes from the first part 116a of the inner cylinder 116, as shown in Figure 5The handle 120 is connected to the base 200 through the connecting column 117, so as to avoid exposed lines, ensure the safety and beauty of the handheld fan 100.

[0065] In combination with Figure 1-Figure 5 As shown in the drawings, in the present application, the plug-in end 120a formed at the lower end of the handle 120 is in a semispherical shape, and when the plug-in end 120a of the handle is plugged into the base 200, the handle can be rotated by 360° along the base 200, so that the handheld fan 100 is more convenient to use, and the plug-in end 120a and the base 200 can be matched to adjust the air outlet angle of the handheld fan 100 (detailed later).

[0066] In combination with Figure 5-8 As shown in the drawings, in the present application, the handle 120 includes a first shell 121 and a second shell 122 which are detachably connected, the first shell 121 is connected to the fan shell 111, and in an embodiment, the first shell 121 is integrally formed with the fan shell 111, of course, the forming mode is not limited to this, and the two are separately formed and then connected as a whole without affecting the realization of the function. After the second shell 122 is connected to the first shell 121, a first accommodation space is formed between the first shell 121 and the second shell 122, and the power supply 150 and the control assembly 160 are accommodated in the first accommodation space.

[0067] More specifically, the first shell 121 and the second shell 122 are detachably connected through a fourth clamping structure, the fourth clamping structure includes a fourth recess and a fourth protrusion, and one of the first shell 121 and the second shell 122 further protrudes a clamping piece, the fourth recess is provided on the clamping piece, the fourth protrusion is provided on the other one of the first shell 121 and the second shell 122 and is matched with the fourth recess, and the first shell 121 and the second shell 122 are detachably connected through the detachable clamping between the fourth protrusion and the fourth recess.

[0068] In combination with Figure 5-10 In an embodiment, a key hole 1211 is provided on the first shell 121 to communicate with the inside of the first shell 121, and a plurality of clamping pieces 1212 are protruded at the edge of the side wall of the first shell 121, a fourth recess 1213 is provided on the clamping piece 1212, and the fourth recess 1213 is specifically a clamping hole, but is not limited to this. Correspondingly, a charging hole 1221 is provided on the second shell 122 to communicate with the inside of the second shell 122, and a groove 1222 is provided on the inner wall of the second shell 122, the shape and size of the groove 1222 correspond to those of the clamping piece 1212, a fourth protrusion 1223 is provided in the groove 1222, and the fourth protrusion 1223 is preferably a protruding block. When the first shell 121 and the second shell 122 are clamped, the clamping piece 1212 extends into the groove 1222 and the fourth protrusion 1223 is clamped in the fourth recess 1213 to realize the connection.

[0069] Referring back to Figure 5-Figure 7 As shown, the control assembly 160 comprises a button 161, a first charging interface 162 and a circuit board 163, the control assembly 160 is installed in the handle 120, the button 161 is protruded in the button hole 1211, and the first charging interface 162 is protruded in the charging hole 1221. The power supply 150 is accommodated in the handle 120 at the lower end of the handle 120, and is used to supply power to the circuit board 163 and the motor 130. The principle and setting mode of the power supply 150 and the control assembly 160 are conventional setting modes known to those skilled in the art, and thus will not be described in detail.

[0070] Referring back to Figure 2 As shown, more preferably, the bottom of the handle 120 is further provided with a first charging structure 170 for charging the power supply, and the bottom of the plug-in end 120a is provided with a through hole (not numbered), and the first charging structure 170 is arranged in the through hole and exposed to the handle 120. Specifically, the first charging structure 170 comprises 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 through hole, and the second metal sheet 172 is arranged in the first metal sheet 171 and insulated therefrom, and the first metal sheet 171 and the second metal sheet 172 are 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 be in contact with the charging spring needle 242 (to be described later) on the base 200 to conduct electricity, so as to charge the power supply 150 through the base 200, and can ensure that the handle 120 rotates 360° in the base 200 without interference, so as to make the use of the handheld fan 100 more diversified and convenient.

[0071] Understandably, the first metal sheet 171 and the second metal sheet 172 are not limited to the above-mentioned sleeving structure, as long as they can be in contact with the charging spring needle 242 on the base 200, and the contact surfaces of the two are continuous planes, so as to realize the charging and free rotation of the handheld fan 100.

[0072] As can be known from the above description, the handheld fan 100 of the present application can be charged through the first charging interface 162 on the handle 120, and can also be charged through the first charging structure 170 at the bottom of the handle 120 in cooperation with the base 200, so as to make the use more diversified and convenient.

[0073] The following will be described in combination with Figure 12-Figure 23 As shown, different embodiments of the base 200 of the present application are described respectively.

[0074] Firstly referring to Figure 12-16As 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] like Figure 12-17As 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.

[0079] Combine Figure 12-17 、 Figure 21-23 As 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 portion 211 of the plug-in slot 210. At the same time, 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 portion 212, that is, the handle 120 is tilted along the first abutting surface 2121, so that the handle 120 has a first angle a1 relative to the vertical direction (that is, the center line P1 of the base 200), so that the handheld fan 100 tilts 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.

[0080] Specific reference Figure 21-22 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 plug-in end 120a of the handle 120 is accommodated in the first plug-in portion 211, and the second shell 122 of the handle 120 abuts against the first abutting surface 2121 of the second plug-in portion 212, so that the handheld fan 100 tilts backward by 7.5 degrees. At the same time, the plug-in end 120a of the handle 120 can prevent the handheld fan 100 from falling backward under the abutment of the first plug-in portion 211, thereby making the air outlet direction F of the handheld fan 100 tilt upward compared to the horizontal direction. Similarly, when the handheld fan 100 is plugged into the base 200 in the reverse direction, please refer to the figure. 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 portion 212, so that the air outlet of the handheld fan 100 is tilted downward, that is, the air outlet direction F of the handheld fan 100 is tilted downward compared to the horizontal direction.

[0081] Recombination Figures 12-18 As shown, in the present invention, there is no specific limitation on the overall shape of the base 200, and its shape can be flexibly set to give the base 200 a good appearance.

[0082] See Figure 17-18As shown, in this embodiment, the base 200 includes an upper shell 220 and a lower shell 230 that are connected to each other; the insertion slot 210 is formed in the upper shell 220, and the lower shell 230 is used to support a desktop or table. Specifically, the upper shell 220 has an outer wall 221 and an inner wall that are spaced apart. The inner wall serves as the side wall of the insertion slot 210. The top of the outer wall 221 of the upper shell 220 transitions to the top of the inner wall in an arc shape to form the guide portion 213. At the same time, the outer wall 221 of the upper shell 220 has an outwardly convex arc structure. The outer wall 221 can have a regular or irregular shape. This structural arrangement of the upper shell 220 makes the appearance of the base 200 more beautiful.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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 an air outlet is formed at one end of the fan housing, an inner cylinder is disposed in the fan housing, and the inner cylinder is spaced from an inner wall of the fan housing; an impeller, the impeller being mounted in the fan housing; fixed guide vanes, a plurality of which are radially spaced apart and arranged between the inner cylinder and the fan casing; The inner cylinder includes a first part, which is an open structure facing the impeller. A mounting shaft is convexly provided in the first part and extends toward the impeller. The mounting shaft is used to install a motor, and the motor is used to drive the impeller to rotate.

2. The fan head according to claim 1, wherein: The first part includes a side wall of the inner cylinder, and the first part also includes a partition, and the side wall and the partition form the opening structure.

3. The fan head according to claim 2, characterized in that: The opening structure is spaced apart from the impeller.

4. The fan head according to claim 1, wherein: The fan head further includes a shroud, the inner cylinder includes a second portion, the second portion is connected to the first portion, and the shroud is mounted on the second portion.

5. The fan head according to claim 4, characterized in that: One end of the fixed guide vane extends to the air outlet, and the width of the fixed guide vane gradually narrows from the inner tube toward the air outlet. The fixed guide vane forms a drainage structure to gather the outgoing air and increase the air supply distance. The guide cover and one end of the fixed guide vane are adjacent to each other.

6. The fan head according to claim 4, characterized in that The fixed guide vanes each include a first part and a second part connected to the first part, the first part includes two side walls arranged opposite to each other, the two side walls are respectively arranged on the inner wall of the inner cylinder and the inner wall of the fan casing, one end of the second part extends to the air outlet, and the width of the second part gradually narrows from the inner cylinder toward the air outlet.

7. The fan head according to claim 5, characterized in that The second portion is disposed adjacent to the air guide cover.

8. The fan head according to claim 4, wherein: The side wall of the fixed guide vane away from the inner wall of the fan housing is arc-shaped.

9. The fan head according to claim 4, wherein: One end of the air deflector is open and is an open end, and the open end is installed on the second part.

10. The fan head according to claim 9, characterized in that The open end has a clamping end formed by shrinkage, and the clamping end is clamped to the second part of the inner tube via a third clamping 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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