Handheld fan

Abstract

The utility model discloses a handheld fan which comprises a handle and a fan head connected with the handle, the fan head comprises a fan shell, an air inlet cover and an air outlet cover, and the fan shell is of a long-barrel-shaped structure and comprises an air inlet end and an air outlet end opposite to the air inlet end. The air inlet cover is installed at the air inlet end and forms an air inlet, the air outlet cover is installed at the air outlet end and forms an air outlet, and the air inlet cover comprises a plurality of air inlet guide vanes which are evenly arranged. The multiple air inlet guide vanes are inclined towards the air outlet end on the air inlet side so that the air inlet cover can form an inner concave structure on the air inlet side and form an inner concave cavity. According to the handheld fan, the inner concave cavity is formed in the air inlet side of the air inlet cover, more air can be gathered in the inner concave cavity, and therefore the situation that an air field enters the handheld fan and is divided and scattered too early is avoided in advance, and noise is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the fan field especially, relate to a handheld fan. BACKGROUND

[0002] Handheld fan is small and exquisite, convenient to carry, and convenient to use in close distance, therefore, get more people's favor. The current market handheld fan is generally larger when the wind pressure is larger, the noise seriously affects the experience of user, and, the composition part of existing handheld fan is more, usually needs four to six screws to fix, and the installation is complex, in addition, the fan head and handle of existing handheld fan are usually not detachable connection, cannot replace different model fan head, are not favorable to modular production, and the cost is high. SUMMARY

[0003] The utility model discloses a handheld fan to effectively reduce the noise and improve the experience of user.

[0004] In order to realize the above-mentioned purpose, the utility model provides a handheld fan, including handle and the fan head that is connected with handle, the fan head includes fan shell, air inlet cover and air outlet cover, the fan shell is long barrel structure and includes air inlet end and air outlet end opposite with air inlet end, the air inlet cover is installed in air inlet end and forms air inlet, the air outlet cover is installed in air outlet end and forms air outlet, the air inlet cover includes the multiple air inlet guide vanes that are evenly arranged, multiple air inlet guide vanes are all inclined to air outlet end direction on the side of air inlet to make the air inlet cover form the concave structure on the side of air inlet and form the concave cavity.

[0005] Preferably, the air inlet cover includes an air inlet shell and a middle connecting block, the air inlet guide vanes are connected between the air inlet shell and the middle connecting block, the included angle between the connecting line between the inner edge of the outer end surface of the air inlet shell and the center of the outer end surface of the middle connecting block and the axis of the air inlet cover is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0006] Preferably, the outer side surface of the air inlet cover is recessed inwardly with multiple first clamping grooves, the inner side surface of the fan shell is provided with multiple first clamping protrusions corresponding to the first clamping grooves, the first clamping protrusions and the first clamping grooves are clamped and detachably connected.

[0007] Preferably, the lower part of the fan head extends outwardly with a connecting part, the handle comprises a first shell and a second shell, the first shell and the second shell are connected together and form a hollow pipe body with two open ends, the first shell is provided with a first protruding column on the inner side of one end close to the connecting part, the second shell is provided with a second protruding column on the inner side of one end close to the connecting part, the connecting part is provided with a first matching hole and a second matching hole corresponding to the first protruding column and the second protruding column respectively, the first protruding column is embedded in the first matching hole and the second protruding column is embedded in the second matching hole to connect the fan head and the handle.

[0008] Preferably, the inside of the hollow pipe body is provided with a control assembly, the control assembly comprises a circuit board, the lower part of the fan head further extends outwardly with a connecting rod, the end of the connecting rod is provided with a connecting hole in the inside of the connecting rod, the circuit board is arranged below the connecting rod and the circuit board is provided with a docking hole corresponding to the connecting hole, the connecting hole and the docking hole are bolted.

[0009] Preferably, the lower part of the fan head further extends outwardly with two positioning rods, the two positioning rods are arranged on both sides of the connecting rod, the circuit board is provided with a positioning hole corresponding to the positioning rod, the positioning rod is embedded in the positioning hole, and the positioning rod and the connecting rod are connected through a connecting plate.

[0010] Preferably, the fan head further comprises an inner cylinder arranged in the fan shell and spaced from the inner wall of the fan shell, a plurality of fixed guide vanes are uniformly arranged on the outer side wall of the inner cylinder, the fixed guide vanes are connected with the inner wall of the fan shell, and the fixed guide vanes have an arc curved surface structure.

[0011] Preferably, a motor is installed in the inner cylinder and an impeller is installed on the motor, the impeller is arranged close to the air inlet cover, the impeller comprises a plurality of blades, the blades comprise an inner side close to the air outlet and an outer side opposite to the inner side, and one end of the fixed guide vane close to the air inlet cover has a pointed end structure inclined towards the inner side.

[0012] Preferably, a plurality of air outlet guide vanes are uniformly arranged on the air outlet cover, and the air outlet guide vanes are aligned with one end of the fixed guide vanes away from the air inlet cover.

[0013] Preferably, a plurality of second clamping grooves are recessed inwardly on the outer side of the air outlet cover, a plurality of second clamping protrusions are arranged on the inner side of the fan shell corresponding to the second clamping grooves, and the second clamping protrusions are clamped with the second clamping grooves.

[0014] Compared with the prior art, the inner recess cavity is formed on the air inlet side of the air inlet cover, more air can be gathered at the inner recess cavity, so that the wind field is prevented from being divided and scattered too early when entering the handheld fan, and noise is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an angle structural view of the handheld fan of the utility model.

[0016] Figure 2 It is another angle structural view of the handheld fan of the utility model.

[0017] Figure 3 It is an exploded structural view of the handheld fan of the utility model.

[0018] Figure 4 It is a structural view of the first shell of the handheld fan of the utility model.

[0019] Figure 5 It is an angle structural view of the fan shell, the inner cylinder, the fixed guide vane and the connecting part integrally arranged in the handheld fan of the utility model.

[0020] Figure 6 It is another angle structural view of the fan shell, the inner cylinder, the fixed guide vane and the connecting part integrally arranged in the handheld fan of the utility model.

[0021] Figure 7 It is a sectional structural view of the handheld fan of the utility model.

[0022] Figure 8 It is another sectional structural view of the handheld fan of the utility model.

[0023] Figure 9 It is a first structural view of the air inlet cover of the handheld fan of the utility model.

[0024] Figure 10 It is a second structural view of the air inlet cover of the handheld fan of the utility model.

[0025] Figure 11 It is a third structural view of the air inlet cover of the handheld fan of the utility model.

[0026] Figure 12 It is a fourth structural view of the air inlet cover of the handheld fan of the utility model.

[0027] IDENTIFICATION OF DRAWINGS:

[0028] 10. Handheld fan; 101. Air inlet; 102. Air outlet; 1. Fan head; 11. Fan housing; 111. First snap-fit ​​protrusion; 112. First positioning groove; 113. Second snap-fit ​​protrusion; 114. Second positioning protrusion; 12. Air inlet cover; 120. Concave cavity; 121. Air inlet housing; 1211. First snap-fit ​​groove; 122. Middle connecting block; 123. Air inlet guide vane; 1231. First sub-guide vane; 1232. Second sub-guide vane; 1233. Third sub-guide vane; 1234. Fourth sub-guide vane; 1235. Fifth sub-guide vane; 13. Air outlet cover; 124. Connecting ring; 131. Air outlet guide vane 14. Connecting part; 141. First extension plate; 1411. First mating hole; 142. Second extension plate; 1421. Second mating hole; 143. Connecting rod; 1431. Connecting hole; 144. Positioning rod; 145. Connecting plate; 15. Inner cylinder; 16. Fixed guide vane; 161. Tip structure; 17. Motor; 18. Impeller; 181. Blade; 2. Handle; 21. First housing; 211. First protrusion; 212. Inner cover; 22. Second housing; 221. Second protrusion; 23. Control component; 231. Circuit board; 24. Battery; 25. End cover; 26. Mounting hole; 27. Switch button. Detailed Implementation

[0029] To explain in detail the technical content, structural features, and effects achieved by this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0030] like Figures 1 to 12 As shown, this utility model embodiment provides a handheld fan 10, including a handle 2 and a fan head 1 connected to the handle 2. The fan head 1 includes a fan housing 11, an air inlet shroud 12, and an air outlet shroud 13. The fan housing 11 has a long cylindrical structure and includes an air inlet end and an air outlet end opposite to the air inlet end. The air inlet shroud 12 is installed at the air inlet end and forms an air inlet 101, and the air outlet shroud 13 is installed at the air outlet end and forms an air outlet 102. The air inlet shroud 12 includes a plurality of evenly arranged air inlet guide vanes 123. The plurality of air inlet guide vanes 123 are all inclined towards the air outlet end on the air inlet side so that the air inlet shroud 12 forms a concave structure and a concave cavity 120 on the air inlet side. Specifically, as shown... Figure 3 , Figure 6 as well as Figure 7 As shown, the air intake side of the air intake shroud 12 refers to the side of the air intake shroud 12 facing outward. The air intake shroud 12 also has another side facing the inside of the fan housing 11. The air intake guide vanes 123 are all inclined towards the air outlet on the air intake side, and the air intake guide vanes 123 are all flush with the radial direction of the air intake shroud 12 on the air outlet side for easy installation.

[0031] This embodiment of the invention forms a concave cavity 120 on the air intake side of the air intake cover 12, which allows more air to gather in the concave cavity 120, thereby preventing the airflow from being prematurely divided and dispersed inside the handheld fan 10, thus effectively reducing noise.

[0032] In this embodiment of the utility model, such as Figure 7 As shown, the air inlet shroud 12 includes an air inlet housing 121 and a central connecting block 122. An air inlet guide vane 123 is connected between the air inlet housing 121 and the central connecting block 122. The angle between the line connecting the inner edge of the outer end face of the air inlet housing 121 and the center of the outer end face of the central connecting block 122 and the axis of the air inlet shroud 12 is greater than or equal to 30 degrees and less than or equal to 60 degrees. Specifically, one end of the air inlet guide vane 123 is connected to the air inlet housing 121, and the other end of the air inlet guide vane 123 is connected to the central connecting block 122. By ensuring that the angle between the line connecting the inner edge of the outer end face of the air inlet housing 121 and the center of the outer end face of the central connecting block 122 and the axis of the air inlet shroud 12 is greater than or equal to 30 degrees and less than or equal to 60 degrees, the volume of the concave cavity 120 is large, noise is effectively reduced, and the axial dimension of the fan head 1 is not excessively increased. This is a clever design.

[0033] In this embodiment of the present invention, a plurality of first engaging grooves 1211 are recessed inward on the outer surface of the air inlet shroud 12, and a plurality of first engaging protrusions 111 are provided on the inner surface of the fan housing 11 corresponding to the first engaging grooves 1211. The first engaging protrusions 111 engage with the first engaging grooves 1211, and the first engaging protrusions 111 and the first engaging grooves 1211 are detachably connected. Specifically, as shown in... Figures 3 to 6 As shown, a first snap-fit ​​groove 1211 is provided on the air inlet housing 121. Several first positioning protrusions are also provided on the outer surface of the air inlet cover 12. Several first positioning grooves 112 are also provided on the inner surface of the fan housing 11 corresponding to the first positioning protrusions. By embedding the first positioning protrusions into the first positioning grooves 112 to limit the air inlet cover 12 and the fan housing 11, this embodiment of the invention eliminates the need to connect the air inlet cover 12 and the fan housing 11 with bolts, making disassembly and assembly convenient. Furthermore, since the first snap-fit ​​protrusion 111 and the first snap-fit ​​groove 1211 are detachably connected, the air inlet cover 12 and the fan housing 11 are detachably connected. Therefore, air inlet covers 12 with different structures can be installed on the fan housing 11 as needed. For example, air inlet covers with different structures can be installed... Figures 9 to 12 The four different air inlet shrouds 12 shown are as follows: Figure 9 The air inlet shroud 12 of structure A is shown. The air inlet guide vanes 123 of structure A are in the shape of petals. Figure 10The air inlet cover 12 of the B structure is shown, the air inlet guide vane 123 of the air inlet cover 12 of the B structure is radial and comprises first sub-guide vanes 1231 of different lengths and second sub-guide vanes 1232, the first sub-guide vanes 1231 extend along the radial direction of the air inlet cover 12 and are connected to the middle connecting block 122, the length of the second sub-guide vanes 1232 is shorter than that of the first sub-guide vanes 1231, and a plurality of second sub-guide vanes 1232 are connected to a connecting ring 124, the connecting ring 124 is arranged around the middle connecting block 122, Figure 11 The air inlet cover 12 of the C structure is shown, the air inlet guide vanes 123 of the air inlet cover 12 of the C structure are in an arc structure, Figure 5 The air inlet cover 12 of the D structure is shown, the air inlet guide vanes 123 of the air inlet cover 12 of the D structure comprise third sub-guide vanes 1233, fourth sub-guide vanes 1234 and fifth sub-guide vanes 1235, the third sub-guide vanes 1233, the fourth sub-guide vanes 1234 and the fifth sub-guide vanes 1235 form a Y shape, the third sub-guide vanes 1233 and the fourth sub-guide vanes 1234 are arranged symmetrically relative to the reverse extension line of the fifth sub-guide vanes 1235, the third sub-guide vanes 1233 and the fourth sub-guide vanes 1234 in the adjacent air inlet guide vanes 123 are connected to each other, the fourth sub-guide vanes 1234 and the third sub-guide vanes 1233 in the adjacent air inlet guide vanes 123 are connected to each other, the fifth sub-guide vanes 1235 are connected to the middle connecting block 122, and it should be noted that the design of the air inlet guide vanes 123 of the air inlet cover 12 of the C structure and the air inlet cover 12 of the D structure makes the wind field have a smooth curve before entering the air duct, and thus a greater wind speed flows into the air duct, so that a greater air volume is obtained, and the design is ingenious.

[0034] In the embodiment of the utility model, Figures 1 to 7As shown, the lower part of the fan head 1 outwardly extends a connecting part 14, the handle 2 comprises a first shell 21 and a second shell 22, the first shell 21 and the second shell 22 are spliced and connected and form a hollow pipe body with both ends being open, the first shell 21 is provided with a first protruding column 211 on the inner side of the end close to the connecting part 14, the second shell 22 is provided with a second protruding column 221 on the inner side of the end close to the connecting part 14, the connecting part 14 is provided with a first matching hole 1411 and a second matching hole 1421 corresponding to the first protruding column 211 and the second protruding column 221 respectively, the first protruding column 211 is embedded in the first matching hole 1411 and the second protruding column 221 is embedded in the second matching hole 1421 to connect the fan head 1 and the handle 2. Specifically, the first shell 21 and the second shell 22 are detachably spliced and connected, the connecting part 14 comprises a first extension plate 141 and a second extension plate 142 which are arranged at intervals, the first extension plate 141 and the second extension plate 142 are arranged corresponding to the first shell 21 and the second shell 22 respectively to be attached to the inner walls of the first shell 21 and the second shell 22, the first extension plate 141 is provided with the first matching hole 1411, the second extension plate 142 is provided with the second matching hole 1421, one end of the hollow pipe body is connected with the fan head 1, the other end of the hollow pipe body is further provided with an end cover 25 and is closed through the end cover 25, in the embodiment of the utility model, the lower part of the first shell 21 is further provided with an inner cover 212, the first shell 21 is clamped and connected with the second shell 22 and the inner cover 212 is clamped and connected with the lower part of the second shell 22, the bottom of the inner cover 212 is provided with a recess, the end cover 25 is embedded in the recess, the specific way of clamped and connected is not limited and can be selected according to actual needs, therefore, the fan shell 11 and the handle 2 do not need to be connected through screws and are very convenient to disassemble and assemble.

[0035] As shown in the embodiment of the utility model, Figures 3 to 7 As shown, the inside of the hollow pipe body is provided with a control assembly 23, the control assembly 23 comprises a circuit board 231, the lower part of the fan head 1 further outwardly extends a connecting rod 143, the end of the connecting rod 143 is provided with a connecting hole 1431 in the inside of the connecting rod 143, the circuit board 231 is arranged below the connecting rod 143 and the circuit board 231 is provided with a docking hole corresponding to the connecting hole 1431, the connecting hole 1431 and the docking hole are bolted. Specifically, the inside of the hollow pipe body is further provided with a battery 24, the battery 24 is arranged below the circuit board 231 and is electrically connected with the circuit board 231, the first shell 21 and the second shell 22 are further provided with a mounting hole 26 at the spliced position, the handheld fan 10 further comprises a switch button 27, the first shell 21 and the second shell 22 clamp the switch button 27 in the mounting hole 26 during splicing, the connecting hole 1431 and the docking hole are both one, that is, only one bolt can realize the fixed installation of the circuit board 231 and the fan head 1, the design is ingenious.

[0036] As shown in the embodiment of the utility model,Figures 6 to 7 As shown in the drawings, the lower part of the fan head 1 further extends outwardly with two positioning rods 144, which are arranged on the two sides of the connecting rod 143, and the circuit board 231 is provided with positioning holes corresponding to the positioning rods 144, the positioning rods 144 are embedded in the positioning holes, and the positioning rods 144 are connected with the connecting rod 143 through the connecting plate 145, specifically, the positioning rod 144, the connecting rod 143 and the connecting plate 145 are integrally arranged, so that the circuit board 231 is conveniently positioned and installed with the fan head 1.

[0037] In the embodiment of the utility model, as shown in Figure 3 , Figure 5 and Figure 8 , the fan head 1 further comprises an inner cylinder 15 arranged in the fan shell 11 and spaced from the inner wall of the fan shell 11, and a plurality of fixed guide vanes 16 are uniformly arranged on the outer side wall of the inner cylinder 15, the fixed guide vanes 16 are connected with the inner wall of the fan shell 11, and the fixed guide vanes 16 are in arc curved surface structure. Specifically, the fixed guide vanes 16 in arc curved surface structure are more in line with aerodynamics than straight guide vanes, and air circulation is smoother.

[0038] Further, as shown in Figure 3 , Figure 5 and Figure 8 , the motor 17 is installed in the inner cylinder 15 and the impeller 18 is installed on the motor 17, the impeller 18 is arranged close to the air inlet cover 12, the impeller 18 comprises a plurality of blades 181, the blades 181 comprise an inner side surface facing the air outlet 102 and an outer side surface opposite to the inner side surface, and one end of the fixed guide vane 16 close to the air inlet cover 12 is in a pointed end structure 161 inclined towards the inner side surface. Specifically, the pointed end structure 161 inclined towards the inner side surface is more conducive to guiding the wind into the fixed guide vane 16 and reducing resistance, and the design is ingenious.

[0039] Further, as shown in Figure 8 , a plurality of air outlet guide vanes 131 are uniformly arranged on the air outlet cover 13, the air outlet guide vanes 131 are aligned with one end of the fixed guide vanes 16 away from the air inlet cover 12, so as to ensure that the wind in the fan shell 11 can be smoothly discharged with large air volume.

[0040] In the embodiment of the utility model, the outer side surface of the air outlet cover 13 is inwardly recessed with a second clamping groove, the inner side surface of the fan shell 11 is provided with a plurality of second clamping protrusions 113 corresponding to the second clamping groove, the second clamping protrusions 113 are clamped with the second clamping groove, and the disassembly and assembly are very convenient. Specifically, the outer side surface of the air outlet cover 13 is further provided with a plurality of second positioning grooves, the inner side surface of the fan shell 11 is further provided with a plurality of second positioning protrusions 114 corresponding to the second positioning grooves, and the second positioning protrusions 114 are embedded in the second positioning grooves to limit the air outlet cover 13 and the fan shell 11.

[0041] In the embodiment of the utility model, first shell 21 and second shell 22 are detachable split connection, and fan head 1, air inlet cover 12, air outlet cover 13 and handle 2 are all connected through clamping, only circuit board 231 is connected with fan head 1 through bolt, namely, the embodiment of the utility model hand-held fan 10 can be assembled through only one screw, and the structure is simple and convenient to disassemble.

[0042] The above disclosed is only the preferred embodiment of the utility model, of course, cannot with this to limit the utility model right scope, therefore, the equivalent change made according to the utility model application patent scope still belongs to the range covered by the utility model.

Claims

1. A hand-held fan, characterized in that The fan comprises a handle and a fan head connected with the handle, the fan head comprises a fan shell, an air inlet cover and an air outlet cover, the fan shell is in a long tube structure and comprises an air inlet end and an air outlet end opposite to the air inlet end, the air inlet cover is installed on the air inlet end and forms an air inlet, the air outlet cover is installed on the air outlet end and forms an air outlet, the air inlet cover comprises a plurality of air inlet guide vanes arranged uniformly, and the air inlet guide vanes are all inclined to the air outlet end on one side of the air inlet to form a concave structure on the air inlet side of the air inlet cover and form a concave cavity.

2. The hand fan of claim 1, wherein, The air inlet cover comprises an air inlet shell and a middle connecting block, the air inlet guide vanes are connected between the air inlet shell and the middle connecting block, and the included angle between the line between the inner edge of the outer end surface of the air inlet shell and the center of the outer end surface of the middle connecting block and the axis of the air inlet cover is greater than or equal to 30 degrees and less than or equal to 60 degrees.

3. The hand fan of claim 1, wherein, A plurality of first clamping grooves are recessed inwardly on the outer side surface of the air inlet cover, a plurality of first clamping protrusions are arranged on the inner side surface of the fan shell corresponding to the first clamping grooves, the first clamping protrusions are clamped with the first clamping grooves and the first clamping protrusions and the first clamping grooves are detachably connected.

4. The hand fan of claim 1, wherein, The lower part of the fan head extends outwardly with a connecting part, the handle comprises a first shell and a second shell, the first shell and the second shell are connected in a split manner and form a hollow pipe body with two open ends, a first protruding column is arranged on the inner side surface of one end of the first shell close to the connecting part, a second protruding column is arranged on the inner side surface of one end of the second shell close to the connecting part, a first matching hole and a second matching hole are arranged on the connecting part corresponding to the first protruding column and the second protruding column respectively, the first protruding column is embedded in the first matching hole and the second protruding column is embedded in the second matching hole to connect the fan head and the handle.

5. The hand fan of claim 4, wherein, A control assembly is arranged in the hollow pipe body, the lower part of the fan head further extends outwardly with a connecting rod, a connecting hole is formed in the end of the connecting rod to the inside of the connecting rod, the circuit board is arranged below the connecting rod and a butt joint hole is formed in the circuit board corresponding to the connecting hole, and the connecting hole and the butt joint hole are bolted.

6. The hand fan of claim 5, wherein, The lower part of the fan head further extends outwardly with two positioning rods, the two positioning rods are arranged on the two sides of the connecting rod, positioning holes are arranged on the circuit board corresponding to the positioning rods, the positioning rods are embedded in the positioning holes, and the positioning rods and the connecting rod are connected through a connecting plate.

7. The hand fan of claim 1, wherein, The fan head further comprises an inner cylinder arranged in the fan shell and spaced from the inner wall of the fan shell, a plurality of fixed guide vanes are uniformly arranged on the outer side wall of the inner cylinder, the fixed guide vanes are connected with the inner wall of the fan shell, and the fixed guide vanes are in an arc curved surface structure.

8. The hand fan of claim 7, wherein, The inner cylinder is internally provided with a motor, and an impeller is mounted on the motor and arranged close to the air inlet cover.

9. The hand fan of claim 7, wherein, A plurality of air outlet guide vanes are uniformly arranged on the air outlet cover and aligned with the distal end of the fixed guide vanes away from the air inlet cover.

10. The hand fan of claim 1, wherein, The outer side surface of the air outlet cover is inwardly recessed with a plurality of second clamping grooves, and the inner side surface of the fan shell is provided with a plurality of second clamping protrusions corresponding to the second clamping grooves, and the second clamping protrusions are clamped with the second clamping grooves.

Images