Fan head

Abstract

The embodiment of the invention relates to the technical field of fans, and particularly discloses a fan head which comprises a fan shell, an air outlet is formed in one end of the fan shell, an air outlet end is arranged at one end of the air outlet of the fan shell, and the fan shell is of a long cylindrical structure; the inner cylinder is arranged in the fan shell, and a plurality of fixed guide vanes are arranged between the inner cylinder and the inner wall of the fan shell; the impeller is installed in the fan shell, the impeller comprises a plurality of fan blades, the motor is used for driving the impeller to rotate, and the motor is installed in the inner cylinder; and the flow guide cover is connected to the inner cylinder, the flow guide cover further comprises a sealing end, the sealing end is located at the air outlet, and the sealing end and the fan shell are matched to define at least part of the air outlet.

Description

[0001] Divisional application This application is a divisional application of application No. 202110298949.4 filed on March 20, 2021, entitled "Base and Handheld Fan with Base". Technical Field

[0002] This invention relates to the field of fan technology, and in particular to a fan head. Background Technology

[0003] Handheld fans are popular due to their small size, portability, and ease of use at close range. However, the air outlets of most handheld fans on the market are quite noisy, resulting in a poor user experience. Summary of the Invention

[0004] Therefore, it is necessary to provide a noise-reducing fan head to address the aforementioned technical problems.

[0005] This application embodiment provides a fan head, the fan head comprising: The fan housing has an air outlet at one end, and an air outlet end at the air outlet end. The fan housing has a long cylindrical structure. The inner cylinder is located inside the fan housing and has multiple fixed guide vanes between it and the inner wall of the fan housing; An impeller is installed inside the fan housing and includes multiple blades. A motor is used to drive the impeller to rotate and is installed in the inner cylinder. A flow guide is connected to the inner cylinder. The flow guide also includes a sealing end located at the air outlet. The sealing end and the fan housing cooperate to define at least a portion of the air outlet.

[0006] In one embodiment, the inner cylinder is provided with a partition that divides the inner cylinder into a first part and a second part. The first part forms an opening structure. An installation shaft protrudes from the first part and extends toward the impeller. The side of the installation shaft toward the impeller is used to install a motor, which drives the impeller to rotate.

[0007] In one embodiment, the second portion forms a groove, and the flow guide is mounted on the groove.

[0008] In one embodiment, the fixed guide vane extends at least partially between the sealing end and the fan housing.

[0009] In one embodiment, the width of the fixed guide vane gradually narrows from the inner cylinder toward the air outlet.

[0010] In one embodiment, the fixed guide vane facing the sealing end is arc-shaped.

[0011] In one embodiment, the sealing end is located at the air outlet and has an arc-shaped structure, the arc transitions to the foremost end, and the sealing end does not protrude beyond the front end of the fan housing.

[0012] In one embodiment, the fixed guide vane and the flow guide are arranged adjacent to each other at intervals.

[0013] In one embodiment, the sealing end, the fixed guide vane, and the fan housing are arranged sequentially at intervals.

[0014] In one embodiment, the impeller is an axial flow impeller, and the ratio of the diameter of the motor's magnetic ring to the length of the fan blade is greater than or equal to 2:1.

[0015] The fan head of this application embodiment includes a fan housing with an air outlet at one end and an air outlet end thereon. The fan housing has an elongated cylindrical structure. An inner cylinder is disposed inside the fan housing and has multiple fixed guide vanes between it and the inner wall of the fan housing. An impeller is installed inside the fan housing and includes multiple blades. A motor is used to drive the impeller to rotate and is installed in the inner cylinder. A flow guide is connected to the inner cylinder and includes a sealing end located at the air outlet. The sealing end and the fan housing cooperate to define at least a portion of the air outlet.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of the handheld fan with a base according to the present invention.

[0019] Figure 2 yes Figure 1 A structural diagram of the handheld fan from another angle.

[0020] Figure 3 yes Figure 2Rear view of the handheld fan in the middle.

[0021] Figure 4 yes Figure 2 Side view of a handheld fan.

[0022] Figure 5 yes Figure 2 A cross-sectional view of a handheld fan.

[0023] Figure 6 yes Figure 2 An exploded view of the handheld fan.

[0024] Figure 7 yes Figure 2 Another exploded view of the handheld fan.

[0025] Figure 8 This is an exploded view of the fan housing and handle of the handheld fan of the present invention.

[0026] Figure 9 yes Figure 8 Cross-sectional view of the middle fan housing and the first housing.

[0027] Figure 10 yes Figure 8 Another cross-sectional view of the middle fan housing and the first housing.

[0028] Figure 11 This is a side view of the motor and impeller of the handheld fan of the present invention.

[0029] Figure 12 This is a structural schematic diagram of the first embodiment of the base of the present invention.

[0030] Figure 13 yes Figure 12 The front view.

[0031] Figure 14 yes Figure 13 Top view.

[0032] Figure 15 It is along Figure 14 A cross-sectional view along line AA in the middle.

[0033] Figure 16 It is along Figure 14 A cross-sectional view along the BB line.

[0034] Figure 17 yes Figure 12 The exploded diagram.

[0035] Figure 18 yes Figure 12 Another perspective of the exploded view.

[0036] Figure 19 This is a structural schematic diagram of the second embodiment of the base of the present invention.

[0037] Figure 20 yes Figure 19 A sectional view.

[0038] Figure 21 This is a schematic diagram of the handheld fan with a base of the present invention in use.

[0039] Figure 22 yes Figure 21 A sectional view.

[0040] Figure 23 This is a schematic diagram of another usage state of the handheld fan with base of the present invention. Detailed Implementation

[0041] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements. The present invention aims to provide a handheld fan 1 with a base, comprising a handheld fan 100 and a base 200. The handheld fan 100 can be used independently by hand, or it can be inserted into the base 200 and placed on a table or desk. When the handheld fan 100 is inserted into the base 200, the airflow angle of the handheld fan 100 can be conveniently and quickly adjusted, thereby providing a better user experience and performance.

[0042] Furthermore, the handheld fan 100 provided by this invention has a smaller volume compared to 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. See [reference needed] Figure 3-4 As shown, compared to the handheld fans commonly found on the market (generally no less than 200mm in length and no less than 100mm in width), the handheld fan 100 of this invention is smaller, lighter, and more convenient to carry.

[0043] It should be noted that the size of the handheld fan 100 with a base of the present invention is not limited to the above-mentioned numerical range. Of course, its size range can be set as needed. Furthermore, any other handheld fan 100 of any size can be matched with the corresponding base 200 to achieve the adjustment of the air outlet angle.

[0044] The following is in conjunction with the appendix Figure 1-23 As shown, the structure of the handheld fan 100 and the base 200 in this invention will be described in detail.

[0045] First combine Figures 1-5As 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 has an overall elongated cylindrical structure with an air inlet 1111 and an air outlet 1112 at both ends. The motor 130 and the impeller 140 are installed inside and connected to the fan head 110. The motor 130 drives the impeller 140 to rotate. The impeller 140 faces the air inlet 1111, and the impeller 140 is at a certain distance from both the air inlet 1111 and the air outlet 1112. That is, the impeller 140 is housed within the elongated cylindrical fan head 110 and not exposed. During use, it is difficult for fingers or foreign objects 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 approximately the middle of the fan head 110, and the lower end of the handle 120 forms a plug-in end that is compatible with the base (see below for details); the power supply 150 and the control component 160 are respectively located inside the handle 120 and are electrically connected to the motor 130 respectively.

[0046] The following is combined with Figures 5-7 , Figure 11 As shown, in this invention, the impeller 140 includes a hub 141, a plurality of blades 142 connected to the hub 141, and a shaft 143 connected to the hub 141 (see figure). Figure 6 The rotating shaft 143 is used to connect to the motor 130. Since the overall volume of the handheld fan 100 and the volume of the fan head 110 are smaller than those of existing handheld fans, the area of ​​the fan blades 142 is correspondingly reduced, preventing the handheld fan 100 from feeling top-heavy when held. Simultaneously, this invention employs a high-speed DC brushless external rotor motor, specifically a motor 130 with a speed reaching 4000-10,000 revolutions per minute, thereby increasing airflow and air pressure, and achieving the purpose of increasing the air delivery distance.

[0047] Continue reading Figure 11 As shown, in this invention, the ratio of the magnetic ring diameter D3 (including the outer shell) 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 magnetic ring diameter (including the outer shell) to the length of the fan blade of the traditional axial flow handheld fan which is less than or equal to 1:3. This allows the handheld fan 100 of this invention to significantly reduce the gyroscopic effect.

[0048] See Figure 5 As shown, in this invention, the gap between the fan blade 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, thus the air delivery distance is longer.

[0049] Continue reading Figures 5-7The fan head 110 includes a fan housing 111, fixed guide vanes 112, a guide shroud 113, an air inlet shroud 114, and an air outlet shroud 115. The fan housing 111 has a long cylindrical structure with the air inlet 1111 and air outlet 1112 formed at its two ends, respectively. The air inlet shroud 114 is installed at the air inlet 1111, and the air outlet shroud 115 is snapped onto one end of the air outlet 1112. The fan housing 111 also has an inner cylinder 116 spaced from its inner wall, and the motor 130 is installed in the inner cylinder 116. The long cylindrical structure of the fan housing 111 increases the distance between the air inlet shroud 114 and the air outlet shroud 115 and the fan blades 142, making it more difficult for fingers or debris to contact the fan blades 142, thus ensuring safer and more reliable use. Multiple 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 airflow guiding structure formed by the fixed guide vanes 112 can concentrate the airflow, thereby increasing the air pressure and wind speed, and making the air delivery distance longer. The airflow guide shroud 113 has a hollow structure with one end open and the other end sealed. The open end of the airflow guide shroud 113 is connected to the inner cylinder 116, and the sealed end of the airflow guide shroud 113 is located at the air outlet 1112 and has an arc-shaped structure. The airflow guide shroud 113 can not only isolate the internal noise generated by the fan 100 during operation, achieving a noise reduction effect, but also reduce eddies, and at the same time make the handheld fan 100 more aesthetically pleasing.

[0050] Continue to combine Figure 3 , Figures 5-7 As shown, the air inlet shroud 114 has a plurality of evenly 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 reference. Figure 3 The air inlet guide vane 1141 reduces wind resistance and facilitates smoother air intake. Of course, the air inlet shroud 114 is not limited to the structure of the air inlet guide vane 1141. For example, in other embodiments, the air inlet shroud 114 can be configured as a grille, a honeycomb, or other shapes.

[0051] In this invention, the air inlet shroud 114 and the fan housing 111 are engaged by a first engaging structure. Specifically, the first engaging structure includes a plurality of first recesses 1142 recessed on the side wall of the air inlet shroud 114 (see figure). Figure 6 (as shown) and a plurality of first protrusions 1113 protruding from the inner wall of the fan housing 111 (see) Figure 8As shown, the shape and size of the first protrusion 1113 match the first recess 1142. The first recess 1142 can be a groove or a through hole, and the first protrusion 1113 can be a protrusion or a rib. When the air inlet shroud 114 is installed, its sidewall extends into one end of the air inlet 1111 of the fan housing 111, and the first recess 1142 engages with the first protrusion 1113. Understandably, the positions of the first protrusion 1113 and the first recess 1142 can be interchanged.

[0052] The following is combined with Figure 5-11 As shown, further, one end of the air outlet 1112 of the fan housing 111 is narrowed to form an air outlet, so that the inner diameter D1 of the air outlet 1112 is smaller than the diameter D2 of the airflow channel formed inside the fan housing 111 (see...). Figure 9 This increases wind pressure through volume compression, and the volume compression at one end of the axial air outlet 1112 is more conducive to airflow concentration, thereby increasing the air delivery distance.

[0053] In addition, the air outlet shroud 115 has a ring-shaped structure, and the air outlet shroud 115 is engaged with the air outlet end by a second engaging structure. Furthermore, the air outlet shroud 115 forms an arc-shaped transition with the outer wall of the fan housing 111. Figure 5 As shown. Specifically, the second engaging structure includes a plurality of second recesses 1151 recessed on the inner wall of the air outlet shroud 115 (such as...). Figure 7 (as shown) and multiple second protrusions 1114 protruding from the outer wall of the air outlet end (as shown) Figure 8 As shown, the shape and size of the second protrusion 1114 are adapted to the second recess 1151. The second recess 1151 can be a groove or a through hole, etc., and the second protrusion 1114 can be a protrusion, a rib, etc. When the air outlet cover 115 is engaged with the air outlet end, the second protrusion 1114 engages with the second recess 1151 to achieve connection. Of course, the positions of the second protrusion 1114 and the second recess 1151 can be interchanged.

[0054] Continue to combine Figures 5-6 , Figure 9-10 As shown, each fixed guide vane 112 has a flat, sheet-like structure, and its length extends along the axial direction of the fan housing 111. The width of the fixed guide vane 112 gradually narrows and becomes arc-shaped from the inner cylinder 116 towards the air outlet 1112. The arc-shaped edge 1121 of the fixed guide vane 112 is slightly spaced from the air guide shroud 113. In this 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 airflow rotates out of the fan housing 111, it forms effective viscosity, which greatly improves the focusing effect of the airflow and achieves an ultra-long blowing distance.

[0055] Continue to combine Figures 5-7 , Figure 9-10As shown, the inner cylinder 116 is further provided with a partition 1161, which divides the inner cylinder 116 into a first part 116a and a second part 116b. A mounting shaft 1162 protrudes from the first part 116a, and this mounting shaft 1162 is integrally formed with the partition 1161. The motor 130 is mounted on this mounting shaft 1162. The flow guide 113 is mounted on the second part 116b.

[0056] Specifically, the opening end of the flow guide 113 has a tapered snap-fit ​​end, the outer diameter of which corresponds to the inner diameter of the second part 116b. This snap-fit ​​end and the second part 116b are engaged via a third engagement structure. Specifically, this third engagement structure includes a plurality of third recesses 1163 formed on the sidewall of the second part 116b (see...). Figure 9-10 ) and a plurality of third protrusions 1131 protruding from the outer wall of the snap-fit ​​end (see Figure 7 In this embodiment, the third recess 1163 is a through hole, but it is not limited to this; it can also be a groove. The third protrusion 1131 is a protrusion that matches the aforementioned through hole. Of course, it can also be a rib, etc., as long as it can be securely engaged with the third recess 1163. When installing the air deflector 113, the engaging end of the air deflector 113 extends into the second part 116b and engages the third protrusion 1131 into the third recess 1163 to achieve connection. See [reference needed]. Figure 5 As shown.

[0057] See again Figures 5-7 , Figure 9 As shown, the fan head 110 also has a hollow connecting post 117. One end of the connecting post 117 protrudes radially outward to form a contact portion 1171. The fan housing 111 has a mounting hole 1115 that connects to the interior of the handle 120. The connecting post 117 passes through the mounting hole 1115, and the contact portion 1171 abuts against the outer wall of the fan housing 111. The other end of the connecting post 117 protrudes from the first part 116a of the inner cylinder 116. (See reference...) Figure 5 The wiring is routed through the connecting post 117 to avoid exposed wiring and ensure the safety and aesthetics of the handheld fan 100.

[0058] Combination Figures 1-5 As shown, in this invention, the plug end 120a formed at the lower end of the handle 120 is hemispherical. When the plug end 120a of the handle is plugged into the base 200, it can rotate 360° along the base 200, making the handheld fan 100 more convenient to use. Furthermore, by cooperating with the base 200, the air outlet angle of the handheld fan 100 can be adjusted (see below for details).

[0059] Combination Figure 5-8As shown, in this 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, but this is not a limitation; the two are formed separately and then connected as one unit without affecting the realization of its function. After the second housing 122 is connected to the first housing 121, the first housing 121 and the second housing 122 form a first accommodating space, in which the power supply 150 and the control component 160 are both accommodated.

[0060] More specifically, the first housing 121 and the second housing 122 are engaged by a fourth engaging structure, which includes a fourth recess and a fourth protrusion. Furthermore, one of the first housing 121 and the second housing 122 is also provided with an engaging piece. The fourth recess is formed on the engaging piece, and the fourth protrusion is provided on the other of the first housing 121 and the second housing 122 and cooperates with the fourth recess. The first housing 121 and the second housing 122 are detachably connected by the detachable engagement between the fourth protrusion and the fourth recess.

[0061] Continue to combine Figure 5-10 As shown, in one embodiment, the first housing 121 has a button hole 1211 communicating with its interior, and multiple engaging tabs 1212 protrude from the edge of the side wall of the first housing 121. A fourth recess 1213 is formed on the engaging tab 1212, which is specifically an engaging hole, but not limited thereto. Correspondingly, the second housing 122 has a charging hole 1221 communicating with its interior, and 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 engaging tabs 1212. A fourth protrusion 1223 is provided within the groove 1222, preferably a protrusion. When the first housing 121 and the second housing 122 are engaged, the engaging tabs 1212 extend into the groove 1222 and engage the fourth protrusion 1223 within the fourth recess 1213 to achieve connection.

[0062] See again Figures 5-7 As shown, the control component 160 includes a button 161, a first charging interface 162, and a circuit board 163. The control component 160 is installed inside the handle 120. The button 161 protrudes from the button hole 1211, and the first charging interface 162 protrudes from the charging hole 1221. The power supply 150 is housed inside the handle 120 and located at the lower end of the handle 120. The power supply 150 supplies power to the circuit board 163 and the motor 130. The principle and configuration of the power supply 150 and the control component 160 are conventional configurations well-known to those skilled in the art, and therefore will not be described in detail.

[0063] See again Figure 2 As shown, more preferably, the bottom of the handle 120 is also provided with a first charging structure 170 for charging the power supply. The bottom of the plug end 120a has a through hole (not labeled), and the first charging structure 170 is disposed in the through hole and exposed on the handle 120. Specifically, the first charging structure 170 includes a first metal piece 171 and a second metal piece 172, wherein the first metal piece 171 is annular and the second metal piece 172 is circular. The first metal piece 171 is installed in the aforementioned through hole, and the second metal piece 172 passes through the first metal piece 171 and is insulated from it. The first metal piece 171 and the second metal piece 172 are respectively electrically connected to the power supply 150. When the handle 120 is inserted into the base 200, the first metal plate 171 and the second metal plate 172 can make contact with the charging spring pin 242 on the base 200 (see below for details) to conduct electricity, thereby charging the power supply 150 through the base 200. It can also ensure that the handle 120 can rotate 360° within the base 200 without interference, making the use of the handheld fan 100 more diversified and more convenient.

[0064] Understandably, the first metal piece 171 and the second metal piece 172 are not limited to the above-mentioned sleeve structure. As long as they can contact the charging spring pin 242 on the base 200 and the contact surface of the two is a continuous plane, the handheld fan 100 can be charged and rotated freely.

[0065] As can be seen from the above description, the handheld fan 100 of the present invention can be charged through the first charging port 162 on the handle 120, or it can be charged through the first charging structure 170 at the bottom of the handle 120 in conjunction with the base 200, making it more versatile and convenient to use.

[0066] The following is combined with Figures 12-23 As shown, different embodiments of the base 200 of the present invention will be described respectively.

[0067] See first Figures 12-16 As shown, in a first embodiment of the base 200 of the present invention, the base 200 has a downwardly recessed insertion groove 210, which includes a first insertion portion 211 located at the bottom and a second insertion portion 212 located at the top. (See attached diagram) Figure 15 As shown. The first insertion part 211 is hemispherical and is adapted to the insertion end 120a of the handle 120. The first insertion part 211 is inclined. Specifically, the center line P2 of the first insertion part 211 forms a second angle a2 with the vertical direction. That is, there is a second angle a2 between the center line P2 of the first insertion part 211 and the center line P1 of the base 200. The second angle a2 can be flexibly set as needed, but it should not be too large to prevent the handle from tilting along the first abutment surface 2121 after being inserted into the base 200.

[0068] like Figure 15 As shown, the second insertion portion 212 gradually expands upward from the upper end of the first insertion portion 211, and the second insertion portion 212 has a first abutting surface 2121 and a 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 between the top of the first abutting surface 2121 and the top of the first insertion portion 211 is greater than the distance between the top of the second abutting surface 2122 and the top of the first insertion portion 211. Furthermore, the first abutting surface 2121 is inclined relative to the vertical direction and has a first included angle α1. Specifically, the first abutting surface 2121 gradually inclines from its bottom to its top away from the center line P1 of the base 200. This first included angle α1 can also be flexibly set as needed and should not be too large to prevent the handle 120 from tilting and falling over along the first abutting surface 2121 after being inserted into the base 200. In this invention, the first included angle a1 and the second included angle a2 are approximately the same and preferably between 5° and 15°, but are not limited to the above angles.

[0069] In one specific embodiment of the present invention, the first included angle a1 and the second included angle a2 are both set to 7.5°. This ensures the stability of the handle 120 after it is inserted into the base 200, and also allows for the adjustment of the air outlet angle of the handheld fan 100.

[0070] In addition, in this specific embodiment, the second abutment surface 2122 is slightly inclined outward relative to the vertical direction or extends approximately along the vertical direction, but is not limited to this arrangement. For example, in other embodiments, the second abutment surface 2122 may also be inclined relative to the vertical direction, either closer to the first abutment surface 2121 or away from the second abutment surface 2122, that is, the second abutment surface 2122 is inclined in the direction of the first abutment surface 2121 or in a direction away from the first abutment surface 2121.

[0071] like Figure 12-17 As shown, further, an arc-shaped guide portion 213 is formed between the top of the outer wall of the base 200 and the top of the second plug portion 212. The guide portion 213 is formed by gradually expanding upward and outward from the top of the second plug portion 212. The arc-shaped guide portion 213 makes it easier to insert the handheld fan into the plug slot 210 from any angle, thereby increasing the ease of use.

[0072] Combination Figure 12-17 , Figure 21-23As shown, when the handheld fan 100 is plugged into the base 200, the plug end 120a of the handle 120 is accommodated in the first plug portion 211 of the plug slot 210. At the same time, the first housing 121 or the second housing 122 of the handle 120 abuts against the first contact surface 2121 of the second plug portion 212. That is, the handle 120 is tilted along the first contact 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.

[0073] See details Figure 21-22 The diagram shows a handheld fan 100 inserted into the base 200 in the forward orientation. Specifically, the insertion end 120a of the handle 120 is accommodated within the first insertion portion 211, and the second housing 122 of the handle 120 abuts against the first contact surface 2121 of the second insertion portion 212, causing the handheld fan 100 to tilt backward by 7.5 degrees. Simultaneously, the insertion end 120a of the handle 120, against the first insertion portion 211, prevents the handheld fan 100 from tipping backward, thus causing the airflow direction F of the handheld fan 100 to tilt upward relative to the horizontal direction. Similarly, the state when the handheld fan 100 is inserted into the base 200 in the reverse orientation can be seen in [the diagram]. Figure 23 As shown, at this time, the first housing 121 of the handle 120 abuts against the first contact surface 2121 of the second insertion part 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 relative to the horizontal direction.

[0074] Combined again Figures 12-18 As shown, in this 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.

[0075] See Figure 17-18 As shown, in this embodiment, the base 200 includes an upper housing 220 and a lower housing 230 that are interlocked; wherein, the insertion groove 210 is formed in the upper housing 220, and the lower housing 230 is used to support a table or 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 being the side wall of the insertion groove 210. The top end of the outer side wall 221 of the upper housing 220 and the top end of the inner side wall form the guide portion 213 through an arc transition. 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 regular or irregular in shape. This structural design of the upper housing 220 makes the base 200 more aesthetically pleasing.

[0076] In this embodiment, the lower housing 230 includes a base plate 231 and a side plate 232 connected to the base plate 231. The outer diameter of the side plate 232 corresponds to the inner diameter of the upper housing 220. The base plate 231 has a planar structure, which ensures that the base 200 can be stably placed on a table or countertop. When the upper housing 220 and the lower housing 230 are installed, the side plate 232 of the lower housing 230 extends 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 230 can also be connected in other ways, for example, by interlocking through matching recesses and protrusions.

[0077] More preferably, anti-slip pads 233 can be further provided on the base plate 231 of the lower housing 230, so that the base 200 can be placed more stably on the table or tabletop.

[0078] See again Figures 15-17 As shown, a second charging structure 240 may be further provided inside the base 200, which 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 insertion slot 210 and forms a second angle a2 with the vertical direction. That is, the charging spring pin 242 also forms 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 handheld fan 100 is inserted into the insertion slot 210, the first metal plate 171 and the second metal plate 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. Therefore, the handheld fan 100 is charged through the base 200 connected to the external power source.

[0079] In this embodiment, a second accommodating space is formed between the upper housing 220 and the lower housing 230 of the base 200, and a through hole (not labeled, see below) is provided at the bottom of the upper housing 220 to connect the second accommodating space and the insertion slot 210. Figure 15 The charging circuit board 241 is fixed within the second accommodating space at a 7.5° angle to the horizontal direction, 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 direction. Simultaneously, a through hole is provided on the outer wall 221 of the upper housing 220, and the second charging interface 243 is installed within the through hole and electrically connected to the charging circuit board 241.

[0080] Based on the above description, since the bottom of the handle 120 is provided with a first metal plate 171 and a second metal plate 172, when the handle 120 is inserted into the insertion slot 210, the handle 120 can rotate 360° within the base 200, and can ensure that the two charging spring pins 242 are always in contact with the first metal plate 171 and the second metal plate 172 to achieve charging.

[0081] See Figures 19-20 As shown, in the second embodiment of the base 200 of the present invention, the arrangement of the insertion slot 210 is exactly the same as that of the two embodiments described above, and the second charging structure 240 is optionally provided. Therefore, it will not be described again. The only difference is the shape of the base 200.

[0082] In this embodiment, the top of the upper housing 220 has an extension 222 extending radially therefrom. This extension 222 has an inclined planar structure and is formed by the outer edge of the guide portion 213 extending radially outward and upward at an inclined angle. Figure 20 As shown, the lower surface of the extension 222 is also provided with reinforcing ribs 223. The lower housing 230 has a cylindrical structure, with a planar base plate 231 and an outer side wall 232 and an inner side wall 233 connected to the base plate 231 and spaced apart. During installation, the upper housing 220 is housed in the lower housing 230 and the reinforcing ribs 223 abut against the inner side wall 233. At the same time, the extension 222 and the outer side wall 221 are interlocked to achieve connection. The base plate 231 can ensure that the base 200 stably supports the handheld fan 100.

[0083] In summary, the handheld fan 1 with a base of the present invention has the following advantages: First, the insertion slot 210 provided on the base 200 has a hemispherical first insertion portion 211 and a second insertion portion 212 that gradually expands upward. The second insertion portion 212 has a first abutting surface 2121 and a second abutting surface 2122 facing each other. The first abutting surface 2121 is inclined relative to the vertical direction and has a first included angle α1. 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. This allows the air outlet direction of the handheld fan 100 to also form an included 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, the air outlet 1112 of the fan housing 111 of the handheld fan 100 is provided with multiple fixed guide vanes 112 at intervals, and the inner diameter D1 of the air outlet 1112 is smaller than the diameter D2 of the air flow channel formed inside the fan housing 111. Therefore, the air pressure can be increased by volume compression, and the volume compression at one end of the air outlet 1112 is more conducive to airflow concentration, thereby increasing the air delivery distance. In addition, a hollow air guide shroud 113 is provided at the air outlet 1112, and the sealed end of the air guide shroud 113... With an arc-shaped structure at the air outlet 1112, the air guide 113 can greatly reduce eddies and noise, making the fan free of obvious gyroscopic effects and providing a more comfortable user experience. Furthermore, the fan housing 111 has a long cylindrical structure, which places the fan blades 142 inside the fan housing 111 and away from the air inlet 1111 and the air outlet 1112. Therefore, it is more difficult for fingers or debris to come into contact with the fan blades 142, making it safer and more reliable to use. Finally, the overall size of the handheld fan 100 is reduced, its weight is lighter, its grip is better, and it is more convenient to carry.

[0084] The other structural components of the handheld fan 1 with base of this invention are conventional structures well known to those skilled in the art, and will not be described in detail here.

[0085] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A fan head, characterized in that, include: The fan housing has an air outlet at one end, and an air outlet end at the air outlet end. The fan housing has a long cylindrical structure. The inner cylinder is located inside the fan housing and has multiple fixed guide vanes between it and the inner wall of the fan housing; An impeller is installed inside the fan housing and includes multiple blades. A motor is used to drive the impeller to rotate and is installed in the inner cylinder. A flow guide is connected to the inner cylinder. The flow guide also includes a sealing end located at the air outlet. The sealing end and the fan housing cooperate to define at least a portion of the air outlet.

2. The fan head according to claim 1, characterized in that, The inner cylinder is provided with a partition plate, which divides the inner cylinder into a first part and a second part. The first part forms an open structure. The first part has a protruding mounting shaft that extends toward the impeller. The mounting shaft is used to mount a motor on the side of the mounting shaft toward the impeller. The motor is used to drive the impeller to rotate.

3. The fan head according to claim 2, characterized in that, The second part forms a groove, and the flow guide is installed in the groove.

4. The fan head according to claim 1, characterized in that, The fixed guide vane extends at least partially between the sealing end and the fan housing.

5. The fan head according to claim 4, characterized in that, The width of the fixed guide vane gradually narrows from the inner cylinder toward the air outlet.

6. The fan head according to claim 5, characterized in that, The fixed guide vane has an arc shape on the side facing the sealing end.

7. The fan head according to claim 1, characterized in that, The sealing end is located at the air outlet and has an arc-shaped structure. The arc transitions to the front end of the sealing end, and the sealing end does not protrude from the front end of the fan housing.

8. The fan head according to claim 5, characterized in that, The fixed guide vanes and the flow guide shroud are arranged adjacent to each other at intervals.

9. The fan head according to claim 1, characterized in that, The sealing end, the fixed guide vane, and the fan housing are arranged sequentially at intervals.

10. The fan head according to claim 1, characterized in that, The impeller is an axial flow impeller, 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.

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