Handheld fan

Abstract

The utility model discloses a handheld fan, which relates to the technical field of life electric appliances and comprises a mesh assembly, a motor and fan blades. The mesh assembly comprises a front mesh component and a rear mesh component, the front mesh component and the rear mesh component are fixedly combined with each other, at least one part of the front mesh component extends in the direction away from the rear mesh component, and at least one part of the rear mesh component extends in the direction away from the front mesh component; the motor is contained between the front net component and the rear net component, and the motor can drive the fan blades to rotate between the front net component and the rear net component. The utility model mainly solves the problem of how to further optimize the fluid mechanical property and the mechanical property of the handheld fan. According to the utility model, the mesh assembly can obtain an accommodating space with a larger volume so as to configure a motor with better performance and fan blades with better fluid mechanical performance; the mesh assembly, the motor and the fan blades can swing in a pitching mode and / or in a horizontal mode relative to the handle assembly, so that the handheld fan has a wider air outlet angle.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a handheld fan. Background Art

[0002] With the development of related industrial technologies such as battery technology, motor miniaturization technology, circuit integration technology and mold precision technology, the miniaturization of some household appliances has become possible; among them, various forms of portable fans such as handheld fans, outdoor fans, folding fans and neck hanging fans are important manifestations of the miniaturization of household appliances.

[0003] The handheld fan in the prior art usually includes a front net, a rear net, a motor and fan blades. The front net and the rear net are fixedly combined with each other as a whole. The motor is accommodated between the front net and the rear net (usually the rear net is used as a base to fix the motor on the rear net), and the fan blades are connected to the rotating shaft of the motor to achieve air outlet. In most cases, a handle is connected to one end of the front net and the rear net for easy holding, and the handle can be used to accommodate batteries.

[0004] However, the handheld fans in the prior art still have at least the following technical problems:

[0005] 1. In the handheld fans in the prior art, the spokes of the front net are usually extended in a straight line or curved along the radial direction of the front net, that is, from the outside, the outer contour of the front net is roughly in a plane shape. Such a setting will compress the accommodation space of the motor and the fan blades. Due to the limited accommodation space, the handheld fans in the prior art cannot consider the use of motors with better performance (motors with better performance are usually large in size) and fan blades with better fluid mechanics performance (fan blades with better fluid mechanics performance are usually large in size) from the beginning of design, which makes the air outlet effect of the handheld fan poor;

[0006] 2. The front and rear nets of the handheld fans in the prior art usually cannot rotate relative to the handle, or can only rotate at a small angle relative to the handle, so that the air outlet angle of the handheld fan cannot be adjusted, or can only be adjusted at a small angle.

[0007] In summary, how to further optimize the fluid mechanics and mechanical properties of the handheld fan has become an urgent problem to be solved. Utility Model Content

[0008] The utility model aims to provide a handheld fan which has better fluid mechanics performance and mechanical characteristics.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a handheld fan, which at least includes a grid assembly, a motor and fan blades; the grid assembly includes a front grid component and a rear grid component, the front grid component and the rear grid component are fixedly combined with each other, and at least a portion of the front grid component extends in a direction away from the rear grid component, and at least a portion of the rear grid component extends in a direction away from the front grid component; the motor is accommodated between the front grid component and the rear grid component, and the motor can drive the fan blades to rotate between the front grid component and the rear grid component.

[0010] In the above technical solution, the front mesh component includes a front mesh ring frame, front mesh spokes and a front mesh central bracket which are arranged in sequence from the outside to the inside, and the front mesh spokes extend in both the radial direction and the axial direction of the front mesh component, so that the front mesh ring frame and the front mesh central bracket are mutually offset in the axial direction; the rear mesh component includes a rear mesh ring frame, rear mesh spokes and a motor base which are arranged in sequence from the outside to the inside, and the rear mesh spokes extend in both the radial direction and the axial direction of the rear mesh component, so that the rear mesh ring frame and the motor base are mutually offset in the axial direction; the front mesh ring frame of the front mesh component and the rear mesh ring frame of the rear mesh component are fixedly combined with each other, so that the front mesh component and the rear mesh component are fixedly combined with each other; the motor is fixed on the motor base of the rear mesh component.

[0011] In the above technical solution, the front mesh spokes of the front mesh component extend along an arc path from the front mesh ring frame to the front mesh central support; the rear mesh spokes of the rear mesh component extend along an arc path from the rear mesh ring frame to the motor base.

[0012] In the above technical solution, in the axial section of the front mesh component, the front mesh spokes of the front mesh component are arc-shaped, and the central angle α of the front mesh spokes is 70° to 80°.

[0013] In the above technical solution, in the axial section of the rear mesh component, the rear mesh spokes of the rear mesh component are arc-shaped, and the central angle β of the rear mesh spokes is 70° to 80°.

[0014] In the above technical solution, the motor is an outer rotor motor; the fan blade includes a central support hub, and the central support hub has a plurality of fan blade bodies distributed along the circumferential direction; the central support hub of the fan blade is sleeved on the outer rotor of the motor.

[0015] In the above technical solution, the outer diameter of the central support hub is D1, and the outer diameter of the fan blade body is D2, then: D1:D2=0.5~0.6.

[0016] In the above technical solution, the distance between adjacent blade bodies is L, and the outer diameter D2 of the blade body is, then: L:D2=0.3~0.4.

[0017] In the above technical scheme, the handheld fan of the utility model also includes a handle assembly, which includes a hand-held portion and a pivot arm connected to one end of the hand-held portion; the grid assembly is pivotally connected to the pivot arm of the handle assembly, so that the grid assembly, the motor and the fan blades can all swing in pitch and / or horizontally relative to the handle assembly.

[0018] In the above technical solution, the handle assembly also includes a functional ring; the functional ring is pivoted to the other end of the hand-held portion relative to the pivot arm, and the functional ring can be rotated and positioned relative to the hand-held portion; and / or the functional ring includes a first arm, and a second arm pivoted to the first arm; when the second arm is pressed, it can rotate relative to the first arm, so that the functional ring is an open ring; when the pressure on the second arm is removed, the second arm can be reset, so that the functional ring is a closed ring.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: in the handheld fan of the present invention, at least a portion of the front mesh component extends in a direction away from the rear mesh component, and at least a portion of the rear mesh component extends in a direction away from the front mesh component, so that the mesh assembly can obtain a larger volume of accommodating space to configure a motor with better performance and fan blades with better fluid mechanics performance; in addition, the mesh assembly, the motor and the fan blades can all pitch and swing and / or swing horizontally relative to the handle assembly, so that the handheld fan of the present invention has a wider air outlet angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional view of the utility model.

[0021] Figure 2 This is one of the exploded views of the present invention.

[0022] Figure 3 This is the second exploded view of the present utility model.

[0023] Figure 4 This is a structural view of the grid assembly in the present invention.

[0024] Figure 5 This is a structural view of the fan blade in the utility model.

[0025] The accompanying drawings are marked as follows: 1. grid assembly; 11. front grid component; 111. front grid ring frame; 112. front grid spokes; 113. front grid central bracket; 12. rear grid component; 121. rear grid ring frame; 122. rear grid spokes; 123. motor base; 124. rear cover plate; 125. button; 126. wiring trough cover; 2. handle assembly; 21. hand-held part; 22. pivot arm; 23. functional ring; 24. elastic member; 25. pressure member; 3. motor; 4. fan blade; 41. central support hub; 42. fan blade body; 5. main control circuit board; 51. switch; 52. charging port; 6. battery. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 3 This embodiment provides a handheld fan, which at least includes a grid assembly 1, a motor 3 and fan blades 4.

[0028] The grid assembly 1 includes a front grid component 11 and a rear grid component 12, both of which are integrally injection-molded engineering plastic components; the front grid component 11 and the rear grid component 12 are fixedly combined with each other, and the two can be fixedly combined with each other by means of snap-fit ​​or screw locking, and at least a portion of the front grid component 11 extends in a direction away from the rear grid component 12, and at least a portion of the rear grid component 12 extends in a direction away from the front grid component 11.

[0029] The motor 3 is accommodated between the front mesh member 11 and the rear mesh member 12 , and the motor 3 can drive the fan blade 4 to rotate between the front mesh member 11 and the rear mesh member 12 .

[0030] Specifically, the front net component 11 includes a front net ring frame 111, a front net spoke 112 and a front net central support 113 which are arranged in sequence from the outside to the inside, that is, the front net ring frame 111, the front net spoke 112 and the front net central support 113 are arranged in sequence from the outside to the inside along the radial direction of the front net component 11, and are integrally injection molded with each other; the front net spoke 112 extends in both the radial direction of the front net component 11 and the axial direction of the front net component 11, so that the front net ring frame 111 and the front net central support 113 are mutually displaced in the axial direction; the rear net component 12 includes a rear net ring frame 121, a rear net spoke 122 and a motor base 123 which are arranged in sequence from the outside to the inside, that is, the rear net ring frame 121, the rear net spoke 122 and the motor base 123 are arranged in sequence from the outside to the inside along the radial direction of the rear net component 12, And they are integrally injection molded with each other, wherein the motor base 123 forms an accommodating space on both the inner and outer sides of the rear mesh component 12; the rear mesh spokes 122 extend both in the radial direction of the rear mesh component 12 and in the axial direction of the rear mesh component 12, so that the rear mesh ring frame 121 and the motor base 123 are mutually offset in the axial direction; the front mesh ring frame 111 of the front mesh component 11 and the rear mesh ring frame 121 of the rear mesh component 12 are fixedly combined with each other, so that the front mesh component 11 and the rear mesh component 12 are fixedly combined with each other. In this embodiment, the front mesh ring frame 111 of the front mesh component 11 and the rear mesh ring frame 121 of the rear mesh component 12 are fixedly combined with each other by snap fastening; the motor 3 is fixed on the motor base 123 of the rear mesh component 12, for example, the motor 3 can be fixed on the motor base 123 by snap fastening or screw locking.

[0031] More specifically, the front mesh spokes 112 of the front mesh member 11 extend from the front mesh ring frame 111 to the front mesh central support 113 along an arc path, so that the front mesh spokes 112 extend in both the radial direction and the axial direction of the front mesh member 11; the rear mesh spokes 122 of the rear mesh member 12 extend from the rear mesh ring frame 121 to the motor base 123 along an arc path, so that the rear mesh spokes 122 extend in both the radial direction and the axial direction of the rear mesh member 12.

[0032] See also Figure 4 Furthermore, in the axial cross-section of the front mesh component 11, the front mesh spokes 112 of the front mesh component 11 are arc-shaped, and the central angle α of the front mesh spokes 112 is 70° to 80°. In a preferred embodiment, the central angle α of the front mesh spokes 112 is 75°. Setting the central angle α of the front mesh spokes 112 to this angle can form a larger accommodating space on the inner side of the front mesh component 11 without affecting the air outlet of the front mesh component 11, thereby achieving a balance between the accommodating space and the fluid mechanics performance of the front mesh component 11.

[0033] See also Figure 4Furthermore, in the axial cross-section of the rear mesh member 12, there are: the rear mesh spokes 122 of the rear mesh member 12 are arc-shaped, and the central angle α of the rear mesh spokes 122 is 70°~80°. In a preferred embodiment, the central angle α of the rear mesh spokes 122 is 75°; setting the central angle α of the rear mesh spokes 122 to this angle can form a larger accommodating space on the inner side of the rear mesh member 12 without affecting the air intake of the rear mesh member 12, thereby achieving a balance between the accommodating space and the fluid mechanics performance of the rear mesh member 12.

[0034] Furthermore, the motor 3 is an outer rotor motor, that is, the rotating part of the motor 3 is its outer annular surface; the fan blade 4 includes a central support hub 41, which is in the shape of a wheel hub, and the central support hub 41 has a plurality of fan blade bodies 42 distributed along the circumferential direction. In fact, the fan blade body 42 and the central support hub 41 are integrally formed to constitute the fan blade 4, and the root of the fan blade body 42 is connected to the central support hub 41; the central support hub 41 of the fan blade 4 is sleeved on the outer rotor of the motor 3, specifically, the two are interference fit or key connected.

[0035] See also Figure 5 , further, the outer diameter of the central support hub 41 is D1, and the outer diameter of the blade body 42 is D2, then:

[0036] D1:D2=0.5~0.6.

[0037] By reasonably setting the ratio of the outer diameter D1 of the central support hub 41 and the outer diameter D2 of the blade body 42, the weight of the blade 4 is evenly distributed, thereby improving the dynamic balance performance of the blade 4 and avoiding radial pulling of the shaft of the motor 3 due to inertia when the blade 4 rotates; in addition, the air outlet area of ​​the blade body 42 can be reasonably adjusted to make the body feel comfortable.

[0038] See also Figure 5 , further, the distance between adjacent blade bodies 42 is L, and the outer diameter D2 of the blade body 42 is, then:

[0039] L:D2=0.3~0.4.

[0040] If the distance between the fan blade bodies 42 is too small, it will cause airflow disturbance, increase the friction on the surface of the fan blade bodies 42, and reduce the air outlet efficiency; if the distance between the fan blade bodies 42 is too large, it will cause increased pressure loss and insufficient wind pressure; by reasonably setting the spacing between the fan blade bodies 42, the air outlet effect of the fan blades 4 can be improved.

[0041] See also Figure 1-Figure 3Furthermore, the handheld fan of the present embodiment also includes a handle assembly 2, which includes a handheld portion 21 and a pivot arm 22 connected to one end of the handheld portion 21. In the present embodiment, the handle assembly 2 is composed of two semi-shells of engineering plastic material arranged front and back and combined with each other; the grid assembly 1 is pivotally connected to the pivot arm 22 of the handle assembly 2, so that the grid assembly 1, the motor 3 and the fan blades 4 can all pitch and swing and / or swing horizontally relative to the handle assembly 2.

[0042] Specifically, in the present embodiment, the pivot arm 22 is integrally formed with the hand-held portion 21, and two pivot arms 22 are arranged in a forked shape, so that the handle assembly 2 roughly forms a "Y" shape; a rotating shaft is formed on both sides of the front mesh component 11 and the rear mesh component 12 of the mesh assembly 1, respectively, and a rotating shaft seat is arranged on the inner side of the pivot arm 22, and the mesh assembly 1 is pivoted to the pivot arm 22 of the handle assembly 2 through the cooperation of the rotating shaft and the rotating shaft seat; in the present embodiment, the mesh assembly 1, the motor 3 and the fan blades 4 can all pitch and swing relative to the handle assembly 2.

[0043] It should be noted that the handheld fan of the present embodiment further includes a battery 6, which is a rechargeable lithium battery. The battery 6 is accommodated and fixed in the handheld portion 21 of the handle assembly 2; the handheld fan of the present embodiment further includes a main control circuit board 5, on which a main control is mounted. The main control circuit board 5 is accommodated and fixed in the portion of the motor base 123 outside the rear mesh member 12; the motor 3 and the battery 6 are electrically connected to the main control circuit board 5, respectively, wherein the wires of the motor 3 pass through the bottom plate of the motor base 123 , which can be connected to the main control circuit board 5; for the battery 6, it is routed from the inner side of the hand-held portion 21 and the pivot arm 22 of the handle assembly 2, and the wire passes through the shaft seat to the outside of the handle assembly 2, and then passes through the shaft to the grid assembly 1. The rear mesh component 12 of the grid assembly 1 has a wiring groove formed between the two rear mesh spokes 122. The wire is routed through the wiring groove until it is connected to the main control circuit board 5 in the motor base 123. In addition, the surface of the wiring groove is also covered with a wiring groove cover 126 to protect the wire.

[0044] It should be noted that the motor base 123 is covered with a rear cover 124 on the outer side of the rear mesh component 12 to cover the main control circuit board 5; the main control circuit board 5 is equipped with a switch 51, and a button 125 is embedded in the rear cover 124. The button 125 on the rear cover 124 is aligned with the switch 51 on the main control circuit board 5. Pressing the button 125 can trigger the switch 51, thereby realizing the power on / off and wind speed adjustment functions; the main control circuit board 5 is also equipped with a charging interface 52, which passes through the rear cover 124 to charge the battery 6 through an external power adapter.

[0045] Furthermore, the handle assembly 2 also includes a functional ring 23, which is a buckle made of metal; the functional ring 23 is pivoted at the other end of the hand-held portion 21 relative to the pivot arm 22, and the functional ring 23 can rotate and position relative to the hand-held portion 21; in this embodiment, an elastic member 24 and a pressure member 25 are provided in the hand-held portion 21 of the handle assembly 2, and the pressure member 25 is fixed to the hand-held portion 21 of the handle assembly 2, and compresses the elastic member 24, so that the elastic member 24 is also forced to compress the functional ring 23, thereby making the elastic member 24 and the functional ring 23 have a strong friction force, thereby realizing the positioning of the functional ring 23.

[0046] To be more specific, the functional ring 23 includes a first arm 231 and a second arm 232 pivotally connected to the first arm 231; when the second arm 232 is pressed, it can rotate relative to the first arm 231, so that the functional ring 23 is in the shape of an open ring; when the pressure on the second arm 232 is removed, the second arm 232 can be reset, so that the functional ring 23 is in the shape of a closed ring; in fact, the first arm 231 is an arc-shaped metal component with a larger central angle, and the second arm 232 is an arc-shaped metal component with a smaller central angle. The two are spliced ​​to form a complete circle. A pivot shaft and a torsion spring are provided between the first arm 231 and the second arm 232, so that the second arm 232 can be rotated and reset relative to the first arm 231.

[0047] When the function ring 23 is rotated to a horizontal angle, the handle assembly 2 can be propped up so that the entire handheld fan can be used standing on a desktop; in addition, when the function ring 23 is open, objects (such as hooks or key rings) can be hooked or clamped into the function ring 23, and then the pressure on the second arm 232 is removed to close the function ring 23, and the function ring 23 can be hung on the object, making it convenient to place, fix and carry the handheld fan of this embodiment; in addition, a lanyard can also be hung on the function ring 23 to facilitate the carrying of the handheld fan.

[0048] In the handheld fan of the present embodiment, at least a portion of the front mesh component 11 extends in a direction away from the rear mesh component 12, and at least a portion of the rear mesh component 12 extends in a direction away from the front mesh component 11, so that the mesh assembly 1 can obtain a larger volume of accommodating space to configure a motor 3 with better performance and a fan blade 4 with better fluid mechanics performance; in addition, the mesh assembly 1, the motor 3 and the fan blade 4 can all pitch and swing and / or swing horizontally relative to the handle assembly 2, so that the handheld fan of the present embodiment has a wider air outlet angle.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A handheld fan, characterized in that: It at least includes a grid assembly, a motor and a fan blade; The mesh assembly comprises a front mesh component and a rear mesh component, wherein the front mesh component and the rear mesh component are fixedly combined with each other, and at least a portion of the front mesh component extends in a direction away from the rear mesh component, and at least a portion of the rear mesh component extends in a direction away from the front mesh component; The motor is accommodated between the front mesh component and the rear mesh component, and the motor can drive the fan blade to rotate between the front mesh component and the rear mesh component; The front net component comprises a front net ring frame, front net spokes and a front net central support which are arranged in sequence from outside to inside, the front net spokes extend in both the radial direction of the front net component and the axial direction of the front net component, so that the front net ring frame and the front net central support are mutually displaced in the axial direction; The rear net component includes a rear net ring frame, rear net spokes and a motor base which are sequentially arranged from the outside to the inside, and the rear net spokes extend in both the radial direction of the rear net component and the axial direction of the rear net component, so that the rear net ring frame and the motor base are mutually offset in the axial direction; The front mesh ring frame of the front mesh member and the rear mesh ring frame of the rear mesh member are fixedly combined with each other, so that the front mesh member and the rear mesh member are fixedly combined with each other; The motor is fixed on the motor base of the rear net member.

2. The handheld fan according to claim 1, characterized in that: The front net spokes of the front net member extend along an arc path from the front net ring frame to the front net central support; The rear net spokes of the rear net component extend from the rear net ring frame to the motor base along an arc path.

3. The handheld fan according to claim 2, characterized in that: In the axial section of the front mesh member, there are: The front mesh spokes of the front mesh component are arc-shaped, and the center angle α of the front mesh spokes is 70° to 80°.

4. The handheld fan according to claim 2 or 3, characterized in that: In the axial section of the rear mesh member, there are: The rear mesh spokes of the rear mesh component are arc-shaped, and the central angle β of the rear mesh spokes is 70° to 80°.

5. The handheld fan according to claim 1, characterized in that: The motor is an outer rotor motor; The fan blade comprises a central support hub, and the central support hub has a plurality of fan blade bodies distributed along the circumferential direction; The central support hub of the fan blade is sleeved on the outer rotor of the motor.

6. The handheld fan according to claim 5, characterized in that: The outer diameter of the central support hub is D1, and the outer diameter of the blade body is D2, then: D1:D2=0.5~0.

6.

7. The handheld fan according to claim 5 or 6, characterized in that: The distance between adjacent blade bodies is L, and the outer diameter D2 of the blade body is, then: L:D2=0.3~0.

4.

8. The handheld fan according to claim 1, characterized in that: Also included is a handle assembly, the handle assembly including a hand-held portion, and a pivot arm connected to one end of the hand-held portion; The mesh grid assembly is pivotally connected to the pivot arm of the handle assembly, so that the mesh grid assembly, the motor and the fan blades can all swing in pitch and / or horizontally relative to the handle assembly.

9. The handheld fan according to claim 8, characterized in that: The handle assembly also includes a functional ring; The functional ring is pivotally connected to the other end of the hand-held portion relative to the pivot arm, and the functional ring can be rotated and positioned relative to the hand-held portion; and / or, The functional ring includes a first arm, and a second arm pivotally connected to the first arm; When the second arm is pressed, it can rotate relative to the first arm, so that the functional ring is in an open ring shape; When the pressure on the second arm is released, the second arm can be reset, so that the functional ring is in a closed ring shape.

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