Portable fan

Abstract

Disclosed in the present application is a portable fan, comprising: a first housing, on which a fan assembly is provided; and a second housing, which is snap-fitted on the first housing, wherein an edge of the first housing protrudes in the direction of the second housing to form a plug-in member, which is provided with a plurality of first snap-fitting members; and an engagement member is arranged in the second housing, and a first plug-in slot is formed between the engagement member and an inner surface of the second housing, the engagement member is provided with a plurality of second snap-fitting members mating with the plurality of first snap-fitting members, the plug-in member is inserted into the first plug-in slot, and the plurality of first snap-fitting members mate with and are snap-fitted with the plurality of second snap-fitting members. By means of the mating of the plug-in slot with the plug-in member, the portable fan does not have the problem of the first snap-fitting member and the second snap-fitting member being disengaged from each other under the action of an external force, thereby improving the strength and stability of the snap-fitting connection of the portable fan.

Description

portable fan Technical Field

[0001] The present application relates to the field of fans, and in particular to a portable fan. Background Art

[0002] In the hot summer, fans have become a must-have item for people to eliminate the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0003] Portable fans are popular because of their compact size and portability. The housing of existing portable fans is generally composed of two shells that snap together. To make the two shells snap together more tightly, buckles and claws are provided on the inner walls of the two shells for mating and snapping. However, the applicant of this application discovered during research that this snap-fit ​​method in the prior art, because both the buckle and the claw are provided on the surface of the corresponding shell, can cause the snap-fitting portion of the shell to deform, bulge, or warp outward when engaged. During use, if this structure is twisted by external forces, the buckle and claw may become disengaged, and the snap-fit ​​connection is not stable enough.

[0004] Application Contents

[0005] The purpose of the present application is to provide a portable fan that is more firmly and stably connected by arranging a buckle inside a shell.

[0006] An embodiment of the present application provides a portable fan, comprising:

[0007] a first housing, wherein a fan assembly is provided on the first housing;

[0008] a second shell, the second shell being buckled onto the first shell;

[0009] The edge of the first shell protrudes in the direction of the second shell to form a connector, and a plurality of first engaging parts are provided on the connector. A engaging part is provided in the second shell, and a first plug-in slot is formed between the engaging part and the inner surface of the second shell. A plurality of second engaging parts that cooperate with the plurality of first engaging parts are provided on the engaging part, and the connector is plugged into the first plug-in slot, and the plurality of first engaging parts cooperate and engage with the plurality of second engaging parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0011] FIG1 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 1 of the present application;

[0012] FIG2 is a transverse perspective schematic diagram of a first housing of a specific embodiment 1 of the present application;

[0013] FIG3 is a schematic diagram of the structure of the second housing from a vertical perspective according to a specific embodiment 1 of the present application;

[0014] FIG4 is a schematic diagram of the combined structure of the first housing and the fan assembly according to a specific embodiment 1 of the present application;

[0015] FIG5 is a schematic diagram of the structure of the first housing in an oblique viewing angle according to a specific embodiment 1 of the present application;

[0016] FIG6 is a schematic diagram of the structure of the second housing in an oblique viewing angle according to a specific embodiment 1 of the present application;

[0017] FIG7 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 2 of the present application;

[0018] FIG8 is an exploded schematic diagram of a first housing and a second housing in a specific embodiment 2 of the present application;

[0019] FIG9 is an overall schematic diagram of a fan motor according to a specific embodiment 2 of the present application;

[0020] FIG10 is an exploded schematic diagram of a fan motor and a first housing according to a second specific embodiment of the present application;

[0021] FIG11 is a perspective diagram of a second housing facing backward according to a second specific embodiment of the present application;

[0022] FIG12 is a schematic structural diagram of a folding blowing device according to a specific embodiment 2 of the present application;

[0023] FIG13 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 3 of the present application;

[0024] FIG14 is an exploded schematic diagram of the first housing and the second housing of a specific embodiment 3 of the present application;

[0025] FIG15 is a schematic structural diagram of a storage housing according to a specific embodiment 3 of the present application;

[0026] FIG16 is a partial enlarged schematic diagram of the second rotation axis (A) of a specific embodiment 3 of the present application;

[0027] FIG17 is a schematic diagram of the exploded structure of a portable fan according to a specific embodiment 3 of the present application;

[0028] FIG18 is a schematic diagram of the first connecting buckle structure of a specific embodiment 3 of the present application;

[0029] FIG19 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 4 of the present application;

[0030] FIG20 is a schematic diagram of the exploded structure of a portable fan according to a fourth specific embodiment of the present application;

[0031] FIG21 is a schematic structural diagram of a first housing according to a fourth embodiment of the present application;

[0032] FIG22 is a schematic diagram of the connection structure between the first PCB circuit board and the second PCB circuit board in a specific embodiment 4 of the present application;

[0033] FIG23 is a schematic diagram of the connection structure of the first PCB circuit board, the second PCB circuit board, and the electronic components in a specific embodiment 4 of the present application;

[0034] FIG24 is a schematic diagram of the connection structure of a first PCB circuit board, a second PCB circuit board, and some electronic components in a specific embodiment 4 of the present application;

[0035] FIG25 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 5 of the present application;

[0036] FIG26 is a schematic diagram of the exploded structure of a portable fan according to a fifth embodiment of the present application;

[0037] FIG27 is a schematic diagram of the structure of a flexible connector according to a specific embodiment 5 of the present application;

[0038] FIG28 is a schematic diagram of the structure of a light-emitting element according to a specific embodiment 5 of the present application;

[0039] FIG29 is a schematic structural diagram of a second housing and a first type of limiting member in a specific embodiment 5 of the present application;

[0040] FIG30 is a schematic diagram of a second structure of a position-limiting member according to a specific embodiment 5 of the present application;

[0041] FIG31 is a schematic structural diagram of a second housing and a third limiting member in a specific embodiment 5 of the present application;

[0042] FIG32 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment 6 of the present application;

[0043] FIG33 is a schematic diagram of the exploded structure of a portable fan according to a specific embodiment 6 of the present application;

[0044] FIG34 is a schematic structural diagram of a fan blade base in a rotating state according to a specific embodiment 6 of the present application;

[0045] FIG35 is a schematic diagram of the exploded structure of a fan blade base according to a specific embodiment 6 of the present application;

[0046] Figure 36 is a schematic structural diagram of a limiting plate of a specific embodiment 6 of the present application. DETAILED DESCRIPTION

[0047] Example 1

[0048] Please refer to Figures 1, 2 and 3. Figure 1 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 2 is a horizontal stereoscopic schematic diagram of the first shell of this embodiment; and Figure 3 is a schematic diagram of the vertical perspective structure of the second shell of this embodiment.

[0049] As shown in Figures 1, 2, and 3, a portable fan comprises a first housing 1 and a second housing 2. The first housing 1 is provided with a fan assembly 3; the second housing 2 is snapped onto the first housing 1; the edge of the first housing 1 protrudes toward the second housing 2 to form a connector 11, which is provided with a plurality of first engaging members 111; a connector 21 is provided within the second housing 2, and a first insertion slot 212 is formed between the connector 21 and the inner surface of the second housing 2; the connector 21 is provided with a plurality of second engaging members 213 that cooperate with the plurality of first engaging members 111; the connector 11 is inserted into the first insertion slot 212, and the plurality of first engaging members 111 and the plurality of second engaging members 213 are engaged and engaged.

[0050] Please refer to FIG4 , which is a schematic diagram of the combined structure of the first housing and the fan assembly in this embodiment.

[0051] As shown in Figure 4, the fan assembly 3 includes a fan motor 31 and fan blades 32. A shaft hole (not labeled) is defined in the first housing 1. The fan motor 31 is disposed within the first housing 1, with the rotating shaft (not labeled) of the fan motor 31 inserted into and extending through the shaft hole. The fan blades 32 are disposed outside the first housing 1 and connected to the end of the rotating shaft extending through the shaft hole.

[0052] In this embodiment, the first engaging member 111 can be a claw or a bayonet. The second engaging member 213 can be a claw or a bayonet. Since the first engaging member 111 and the second engaging member 213 need to be engaged and matched, when the first engaging member 111 is a claw, the second engaging member 213 can be a claw or a bayonet. When the first engaging member 111 and the second engaging member 213 are claws, the first engaging member 111 and the second engaging member 213 are staggered and engaged. When the first engaging member 111 is a claw and the second engaging member 213 is a bayonet, the first engaging member 111 hooks and snaps into the second engaging member 213. Similarly, when the second engaging member 213 is a claw, the first engaging member 111 can also be a claw or a bayonet.

[0053] It should be noted that when the first engaging member 111 is a bayonet, the second engaging member 213 can only be a claw. Similarly, when the second engaging member 213 is a bayonet, the first engaging member 111 can only be a claw.

[0054] In the above embodiment, the housing of the portable fan is divided into a first housing 1 and a second housing 2. A connector 11 is formed at the edge of the first housing 1, and a plurality of first engaging members 111 are provided on the connector 11. A engaging member 21 is provided within the second housing 2. The engaging member 21 is not disposed on the surface of the second housing 2, but rather within the second housing 2. A first insertion slot 212 is formed between the engaging member 21 and the surface of the second housing 2, and a plurality of second engaging members 213 are provided on the engaging member 21. During assembly, the connector 11 is first inserted into the first insertion slot 212. Then, the first engaging members 111 and the plurality of second engaging members 213 on the connector 11 and the engaging member 21 are engaged with each other. In the above structure, because the engaging member 21 is disposed within the second housing 2 and there is a gap between the surfaces of the second housing 2, the engaging process does not cause abnormal protrusions or warping of the surfaces of the first and second housings 1 and 2, resulting in a smoother and more regular surface for the portable fan. At the same time, due to the cooperation between the plug slot and the plug-in component 11, the portable fan will not have the problem of mutual disengagement between the first engaging component 111 and the second engaging component 213 under the action of external force, thereby improving the strength and stability of the portable fan's snap connection.

[0055] The plug connector 11 includes a first plug connector plate 112 . The first plug connector plate 112 is arranged along the length direction of the first housing 1 , and a plurality of first engaging members 111 are arranged on the first plug connector plate 112 .

[0056] Specifically, the connector 11 includes two first plug-in boards 112 , which are oppositely arranged on both sides of the length direction of the first housing 1 . Each first plug-in board 112 is provided with a plurality of first engaging members 111 .

[0057] The connector 11 is configured as a first plug-in board 112 extending along the length direction of the first shell 1, so that when the multiple first engaging members 111 and second engaging members 213 are squeezed or twisted by external force, the force exerted on the locally stressed first engaging members 111 and second engaging members 213 can be transmitted and shared through the stress of the first plug-in board 112, thereby improving the connection stability.

[0058] The connector 11 includes a plurality of connectors 113, which are spaced apart on a first connector board 112. The connectors 113 can be evenly spaced, but the arrangement of the connectors 113 is not limited to this. Depending on the specific application scenario, in some embodiments, the connectors 113 can be arranged at irregular intervals. For example, in some embodiments, the connectors 113 are densely spaced at both ends of the first housing 1, while they are relatively sparsely spaced in the middle of the first housing 1.

[0059] The provision of the plug connector 113 enables a portion of the plug connector 11 to be inserted more deeply into the first plug slot 212, making the connection between the plug connector 11 and the first plug slot 212 tighter and more stable. Furthermore, the provision of the plug connector 113 serves as a guide, which can better guide the first plug board 112 into the first plug slot 212.

[0060] Every two first engaging members 111 in the plurality of first engaging members 111 form a pair and are disposed below each plug connector 113 in the plurality of plug connectors 113 .

[0061] The first engaging members 111 arranged in pairs can form a local linear structure, play a role of mutual restraint, and reduce the occurrence of tripping events.

[0062] The combination of the plurality of first engaging members 111 is not limited to a combination in pairs. In some embodiments, the plurality of first engaging members 111 can be arranged individually, in groups of three, in groups of four, or more under each plug connector 113 .

[0063] The first engaging member 111 is arranged below the plug connector 113 , and the guiding function of the plug connector 113 enables the first engaging member 111 to be more conveniently engaged with the second engaging member 213 , thereby facilitating assembly.

[0064] The connector 11 is further provided with a guide piece 114, which is arranged on the side of the first plug board 112 facing away from the connector 21. The guide piece 114 extends from the edge of the first shell 1 to the side of the first plug board 112 facing the second shell 2, and gradually becomes smaller along the extension direction.

[0065] The guide piece 114 is arranged on a side of the first plug-in board 112 facing away from the clamping member 21 , and is arranged at a position opposite to the position of the first clamping member 111 .

[0066] The provision of the guide piece 114 can make the connection between the first plug-in board 112 and the first plug-in slot 212 tighter, avoiding the problem of the first shell 1 and the second shell 2 swaying left and right due to the gap between the first plug-in board 112 and the first plug-in slot 212. At the same time, during the process of the first plug-in board 112 being plugged into the first plug-in slot 212, the guide piece 114 gradually increases in size, playing a guiding role while gradually increasing the support and restraining force on the first engaging member 111. This ensures that the top end of the first plug-in board 112 has sufficient movable deformation space during the plug-in process for deformation and engagement; and also ensures that after the engagement is completed, the restricted movable space of the first plug-in board 112 can make it easier for the first engaging member 111 to engage with the second engaging member 213.

[0067] The clamping member 21 includes a plurality of first clamping plates 211 , which are spaced apart along the length direction of the second housing 2 .

[0068] The first clipping plates 211 can be distributed at equal intervals, but the arrangement of the first clipping plates 211 is not limited to this. Depending on the specific application scenario, in some embodiments, the first clipping plates 211 can be arranged at uneven intervals. For example, in some embodiments, the first clipping plates 211 are distributed more closely at both ends of the second housing 2, while the first clipping plates 211 are distributed more sparsely in the middle of the second housing 2.

[0069] The first clamping plates 211 are disposed inside the second housing 2 and distributed on the inner sides of two side edges of the second housing 2 . The first clamping plates 211 on the left and right sides are disposed in pairs.

[0070] The plurality of first clamping plates 211 are independently and spaced apart from each other, so as to facilitate the disassembly of the clamping connection between the first shell 1 and the second shell 2 .

[0071] Every two second engaging members 213 in the plurality of second engaging members 213 constitute a group, and are arranged in pairs on each first engaging plate 211 in the plurality of first engaging plates 211 .

[0072] The second engaging members 213 arranged in pairs can form a local linear structure, play a role of mutual restraint, and reduce the occurrence of tripping events.

[0073] The combination of the plurality of second engaging members 213 is not limited to a combination in pairs. In some embodiments, the plurality of first engaging members 111 can be provided on the first clamping plate 211 in single, three, four or more combinations.

[0074] Each of the multiple first clip-on plates 211 is provided with a connecting plate 214 on both sides, one end of the connecting plate 214 is connected to the first clip-on plate 211, and the other end of the connecting plate 214 is connected to the inner surface of the second shell 2, and the height of the connecting plate 214 is lower than the height of the first clip-on plate 211.

[0075] Connecting plates 214 are provided on both sides of each first snap-in plate 211. The provision of the connecting plates 214 can enhance the stability of the first snap-in plate 211, making it less likely for the first snap-in plate 211 to bend when subjected to external force, thereby making the snap connection more secure.

[0076] In some embodiments, when the connector 11 includes: a first plug-in board 112, in order to facilitate the continuous first plug-in board 112 to be plugged into the spaced first plug-in slots 212, the height of the connectors on both sides of the first snap-in board 211 is lower than the height of the first snap-in board 211. This structure enables gaps to appear on both sides of the first snap-in board 211 near the ends of the first shell 1, and the gaps enable the first plug-in board 112 to be inserted.

[0077] It should be noted that, in some embodiments, the first plug board 112 can also have the same independent spacing structure as the first clip board 211. In some embodiments, the first clip board 211 can also be continuous with the first plug board 112 and extend continuously along the length direction of the second housing 2.

[0078] In some embodiments, since the fan motor 31 in the fan assembly 3 is generally circular and disposed at the end of the first housing 1, the structure there is relatively compact, making it difficult to provide a separate first snap-on plate 211 for snap-on connection. Therefore, the first housing 1 defines second insertion slots 12 on both sides of the fan assembly 3. The second housing 2 has raised edges corresponding to the second insertion slots 12 to form second insertion plates 22 that mate with the second insertion slots 12. Both the second insertion slots 12 and the second insertion plates 22 are curved along the circumference of the fan assembly 3.

[0079] The first housing 1 has second insertion slots 12 on either side of the fan motor 31, and a second insertion plate 22 is provided at a corresponding position on the second housing 2. Both the second insertion slots 12 and the second insertion plate 22 are curved along the circumference of the fan assembly 3, enabling the insertion structure to better adapt to the outer contour of the fan motor 31, making the portable fan more compact. Furthermore, the insertion structure on either side of the fan motor 31 ensures the sealing of the first housing 1 and the second housing 2 around the fan motor 31, avoiding the problem of a loose connection between the first housing 1 and the second housing 2 at this location due to the lack of a connection structure. This effectively prevents dust and foreign matter from entering the interior of the housing through this point, ensuring the cleanliness of the interior of the housing. At the same time, since the second plug-in slot 12 and the second plug-in board 22 are both arranged at the edge of the first shell 1 and the second shell 2, they are exposed and visible structures. During assembly, the second plug-in slot 12 and the second plug-in board 22 can be plugged in first as a positioning structure for assembling the first shell 1 and the second shell 2, which improves the efficiency of assembly and makes the alignment and engagement of the first engaging member 111 and the second engaging member 213 more convenient.

[0080] Please refer to FIG. 5 and FIG. 6 . FIG. 5 is a schematic diagram of the structure of the first shell at an inclined viewing angle of this embodiment; FIG. 6 is a schematic diagram of the structure of the second shell at an inclined viewing angle of this embodiment.

[0081] As shown in Figures 5 and 6, the first shell 1 has a second clip plate 13 protruding toward the second shell 2 at the end edge where the fan assembly 3 is set, and a third clip 131 is set on the second clip plate 13. The inner surface of the second shell 2 forms a fourth clip 23 that cooperates with the third clip 131 at a position corresponding to the third clip 131, and the second clip plate 13 is bent in a circumferential arc along the fan assembly 3.

[0082] In this embodiment, the third engaging member 131 can be a claw or a bayonet. The fourth engaging member 23 can be a claw or a bayonet. Since the third engaging member 131 and the fourth engaging member 23 need to be engaged and matched, when the third engaging member 131 is a claw, the fourth engaging member 23 can be a claw or a bayonet. When the third engaging member 131 and the fourth engaging member 23 are claws, the third engaging member 131 and the fourth engaging member 23 interlock and engage. When the third engaging member 131 is a claw and the fourth engaging member 23 is a bayonet, the third engaging member 131 hooks and engages within the fourth engaging member 23. Similarly, when the fourth engaging member 23 is a claw, the third engaging member 131 can also be a claw or a bayonet.

[0083] It should be noted that when the third engaging member 131 is a bayonet, the fourth engaging member 23 can only be a claw. Similarly, when the fourth engaging member 23 is a bayonet, the third engaging member 131 can only be a claw.

[0084] The second clipping plate 13 is curved along the circumference of the fan assembly 3, which allows the second clipping plate 13 to better adapt to the outer contour of the fan motor 31, making the portable fan more compact. At the same time, the second clipping plate 13 plays a role in positioning the fan motor 31, facilitating assembly of the fan motor 31.

[0085] The second housing 2 is provided with a first limiting plate 24 and a second limiting plate 25 on both sides of the fourth engaging member 23 , respectively. The second clamping plate 13 is placed between the first limiting plate 24 and the second limiting plate 25 .

[0086] The first limiting plate 24 and the second limiting plate 25 define the position of the second clamping plate 13 during assembly, facilitating assembly of the first housing 1 and the second housing 2. They also facilitate the clamping connection between the third clamping member 131 and the fourth clamping member 23.

[0087] The second clipping plate 13 has two protruding guide tongues 132 on the side facing the first housing 1, with a gap between the two guide tongues 132. The provision of the two guide tongues 132 can extend the length of the second clipping plate 13, making it easier for the second clipping plate 13 to enter the space between the first limiting plate 24 and the second limiting plate 25, thus facilitating assembly. At the same time, the gap between the two guide tongues 132 allows the guide tongues 132 to deform toward the middle position after receiving the squeezing force from both sides. This can avoid the problem of being unable to assemble when the spatial dimensions between the second clipping plate 13 and the first limiting plate 24 and the second limiting plate 25 do not match due to process errors, thereby improving the fault tolerance of manufacturing errors.

[0088] The first and second limiting plates 24, 25 have facets on their sides facing the fan assembly 3, allowing them to fit snugly against the surface of the fan assembly 3. Since the first and second limiting plates 24, 25 fit snugly against the fan motor 31, they stabilize the fan motor 31. The facets increase the contact area with the fan motor 31 while also accommodating the circular structure of the fan motor 31, making the portable fan even more compact.

[0089] In this embodiment, the cut surface is a surface formed by cutting corners between two adjacent side surfaces of the first limiting plate 24 or the second limiting plate 25 facing the fan motor 31 .

[0090] In some embodiments, the portable fan is a folding fan. In this application scenario, a rotating shaft hole 4 is defined in the first housing 1 and the second housing 2. Therefore, the first plug-in board 112 is disconnected at the shaft hole location, with a set of first engaging members 111 and a plug connector 113 provided on either side of the disconnected location. A first connecting plate 211 corresponding to the shaft hole location has an arc-shaped notch, bisecting the first connecting plate 211. A set of second engaging members 213 is provided on either side of the arc-shaped notch.

[0091] Example 2

[0092] In the hot summer, fans have become a must-have item for people to eliminate the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0093] In the prior art, electrically driven fans are often equipped with a fan motor. To secure the fan motor, a specialized clip-on structure or screws are typically provided within the fan housing. The applicant of this application discovered during research that the prior art methods for securing fan motors are complex and reduce the fan's size.

[0094] Please refer to FIG. 7 and FIG. 8 . FIG. 7 is a schematic diagram of the overall structure of the portable fan of this embodiment; FIG. 8 is a schematic diagram of the exploded first shell and the second shell of this embodiment.

[0095] As shown in Figures 7 and 8, a portable fan comprises: a first housing 1, a fan motor 3, fan blades 4, and a second housing 2. The first housing 1 defines an axial hole 12; the fan motor 3 is disposed within the first housing 1, with a rotating shaft 33 of the fan motor 3 inserted into and extending through the axial hole 12; the fan blades 4 are disposed outside the first housing 1 and connected to one end of the rotating shaft 33 extending through the axial hole 12; the second housing 2 is connected to the first housing 1, and a fixing bracket 21 is provided on the second housing 2. The fixing bracket 21 abuts against the fan motor 3, thereby securing the fan motor 3 between the first and second housings 1 and 2.

[0096] In the above embodiment, the portable fan includes a first housing 1 and a second housing 2, with a fan motor 3 disposed within the first housing 1. The first housing 1 and the second housing 2 are interconnected, and a fixing bracket 21 is provided on the second housing 2. The fixing bracket 21 is capable of abutting against the fan motor 3 when the first housing 1 and the second housing 2 are interconnected, thereby causing the first housing 1 and the fixing bracket 21 to generate a clamping force on the fan motor 3, thereby securing the fan motor 3. The fixing method of clamping the fan motor 3 by the first housing 1 and the second housing 2 has a simple structure, making the internal structure of the fan more compact and the portable fan more compact.

[0097] The first shell 1 and the second shell 2 are connected by snap-fitting. However, the connection method between the first shell 1 and the second shell 2 is not limited to this. Depending on the specific application scenario, in some embodiments, the first shell 1 and the second shell 2 can also be connected by (but not limited to) gluing, hot melting, screws, or riveting.

[0098] In this embodiment, the main body of the fan motor 3 is cylindrical. The fan motor 3 is provided with a rotating shaft 33 . One end of the rotating shaft 33 is arranged inside the fan motor 3 , and the other end extends out of the fan motor 3 .

[0099] In this embodiment, the fan blades 4 are two-blade axial flow fans, and the fan blades 4 are foldable blades. However, the number of blades of the fan blades 4 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of blades of the fan blades 4 can be 3, 4, 5, or more. In some embodiments, the blades of the fan blades 4 can be fixed blades. In some embodiments, the fan blades can also be (but not limited to): a side flow fan, a diagonal flow fan, or a centrifugal fan.

[0100] Please refer to FIG9 , which is an overall schematic diagram of the fan motor of this embodiment.

[0101] As shown in Figure 9, the end of the fan motor 3 facing the first shell 1 is raised to form a first boss 31, and the rotating shaft 33 passes through the first boss 31. The inner surface of the first shell 1 facing the fan motor 3 forms a storage ring 13 that cooperates with the first boss 31. The storage ring 13 is connected to the shaft hole 12, and the first boss 31 extends into the storage ring 13.

[0102] In this embodiment, the first boss 31 is a circular boss. However, the shape of the boss is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the first boss 31 can be (but not limited to): elliptical, prismatic, racetrack-shaped, etc.

[0103] The receiving ring 13 and the shaft hole 12 are stacked on each other and communicated with each other, forming a tower shape.

[0104] The first boss 31 extends into the receiving ring 13 , which can prevent the first boss 31 from directly contacting the inner surface of the first shell 1 , reduce the possibility of damage due to compression contact, and effectively protect the fan motor 3 from damage.

[0105] Please refer to FIG10 , which is an exploded schematic diagram of the fan motor and the first housing according to this embodiment.

[0106] As shown in FIG10 , a flexible connecting ring 11 is provided between the fan motor 3 and the inner surface of the first shell 1 . One end of the flexible connecting ring 11 is glued to the first shell 1 , and the other end of the flexible connecting ring 11 is glued to the fan motor 3 .

[0107] The flexible connecting ring 11 is sleeved on the outside of the storage ring 13. Both sides of the flexible connecting ring 11 are coated with glue, which enables the two sides of the flexible connecting ring 11 to be glued and connected to the first shell 1 and the fan motor 3 respectively. The provision of the flexible connecting ring 11 can further strengthen the connection stability of the fan motor 3, making the fan motor 3 more stably fixed. At the same time, the flexible connecting ring 11 can play a buffering role, which can avoid damage caused by hard contact between the fan motor 3 and the first shell 1. In addition, the flexible connecting ring 11 can also make the assembly space of the fan motor 3 adjustable. When there is a variable error in the size of the fan motor 3, the deformation space of the flexible connecting ring 11 can increase the fault tolerance of the fan motor 3 size and improve the adaptability; at the same time, the buffering effect can also reduce the noise generated when the fan motor 3 is working.

[0108] In some embodiments, when the receiving ring 13 for receiving the first boss 31 is not provided on the first housing 1 , the center of the flexible connecting ring 11 can be further reduced to the same area as the shaft hole 12 .

[0109] In some embodiments, the side of the flexible connecting ring 11 connected to the fan motor 3 is flush with or higher than the surface of the receiving ring 13. This structure of the flexible connecting ring 11 and the receiving ring 13 can effectively avoid damage caused by hard contact between the receiving ring 13 and the fan motor 3.

[0110] In this embodiment, the flexible connecting ring 11 is made of foam glue. However, the material of the flexible connecting ring 11 is not limited thereto. Depending on the specific application scenario, in some embodiments, the flexible connecting ring 11 can be a silicone ring coated with glue, a fabric ring, a paper ring, or a ring made of other elastic materials.

[0111] The inner surface of the first housing 1 is recessed at a location corresponding to the flexible connecting ring 11 to form a storage cavity 14. The flexible connecting ring 11 is adhesively bonded to the storage cavity 14. The provision of storage cavity 14 allows the flexible connecting ring 11 to be thicker, thereby improving the cushioning performance of the flexible connection. The provision of storage cavity 14 also increases the contact area between the flexible connecting ring 11 and the first housing 1, generating greater friction and better offsetting the lateral torque generated by the rotation of the fan motor 3.

[0112] A plurality of reinforcing ribs 141 are provided in the storage cavity 14 . The plurality of reinforcing ribs 141 are radially arranged around the receiving ring 13 . The flexible connecting ring 11 is adhesively connected to one side surface of the plurality of reinforcing ribs 141 .

[0113] In this embodiment, the number of reinforcing ribs 141 is 6. However, the number of reinforcing ribs 141 is not limited thereto, and depending on the specific application scenario, in some embodiments, the number of reinforcing ribs 141 can be (but not limited to): 2, 3, 4, 5, 7 or more.

[0114] The provision of reinforcing ribs 141 enhances the connection strength between the receiving ring 13 and the first housing 1. The space between the reinforcing ribs 141 provides greater deformation space for the flexible connecting ring 11, thereby enhancing the localized cushioning effect of the flexible connecting ring 11. Furthermore, the provision of reinforcing ribs 141 creates a hollow area between the flexible connecting ring 11 and the first housing 1. This hollow area absorbs noise, reducing the vibration noise generated by the fan motor 3 during operation.

[0115] Please refer to FIG. 11 , which is a perspective view of the second housing 2 facing backward in this embodiment.

[0116] The fixing bracket 21 includes a first abutting member 211 , one end of which is connected to the inner surface of the second housing 2 , and the other end of which abuts against a surface of the fan motor 3 facing the second housing 2 .

[0117] A second boss 32 is formed on the side of the fan motor 3 facing the second housing 2. The first abutment 211 spans the second boss 32 and has a notch 211d formed at a position corresponding to the second boss 32. The second boss 32 of the fan motor 3 is generally located directly opposite the rotor (not shown) of the fan motor 3. The notch 211d prevents the first abutment 211 from squeezing the fan motor 3, thereby protecting the fan motor 3.

[0118] The first abutting member 211 includes a first abutting piece 211a, a second abutting piece 211b, and a third abutting piece 211c. The first abutting piece 211a spans the second boss 32, and a notch 211d is formed on the first abutting piece 211a. The second abutting piece 211b and the third abutting piece 211c are respectively connected to one end of the first abutting piece 211a. The second abutting piece 211b and the third abutting piece 211c are parallel to each other and gradually decrease in thickness as the inner surface of the second housing 2 bends. The provision of the first abutting piece 211a, the second abutting piece 211b, and the third abutting piece 211c can increase the contact area with the fan motor 3, making the extrusion force on the fan motor 3 more uniform, and can also increase the abutting area. The change in thickness of the second contact piece 211b and the third contact piece 211c can keep the contact surfaces of the second contact piece 211b and the third contact piece 211c and the fan motor 3 level, and can also make the fan motor 3 bear force evenly.

[0119] The fixing bracket 21 also includes: a second abutment 212, one end of the second abutment 212 is connected to the inner surface of the second housing 2, and the other end of the second abutment 212 abuts against the side surface of the fan motor 3 facing the second housing 2, and there is a gap between the first abutment 211 and the second abutment 212. The provision of the second abutment 212 can further increase the area of ​​the fan motor 3 subjected to the extrusion force, making the fan motor 3 more stable. At the same time, since the second abutment 212 is spaced apart from the first abutment 211, it can avoid the problem of uneven force caused by one side of the fan motor 3 or excessive concentration of force points in a certain area, thereby further improving the stability and balance of the fan motor 3.

[0120] Example 3

[0121] In the hot summer, fans have become a must-have item for people to eliminate the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0122] Folding fans are popular among users due to their compact size and portability. Conventional folding fans consist of a housing with a storage cavity and a fan body with a fan assembly, with the fan body and housing being movably connected. To ensure the stability of the airflow direction during use, the space between the fan body and the housing must be maintained in a specific configuration.

[0123] The applicant of this application discovered during research that the prior art folding fan maintains its relative position to the housing through friction between the contact surfaces of the fan body and the housing. However, this friction gradually decreases with use, causing the fan body and the housing to lose their relative position, thus affecting the use of the folding fan.

[0124] Please refer to Figures 13 and 14. Figure 13 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 14 is a schematic diagram of the three-dimensional structure of the first shell and the second shell of this embodiment.

[0125] As shown in Figure 13, a portable fan comprises a fan body 1 and a storage housing 2. One end of the fan body 1 defines two opposing first and second rotational axis holes 13 and 14. The storage housing 2 is provided with a first and second rotational axis 21, 22 that mate with the first and second rotational axis holes 13 and 14. The storage housing 2 defines a storage cavity (not shown) for accommodating the fan body 1. A first stopper 17 and a second stopper 18 are provided within the fan body 1, respectively. The first stopper 17 abuts the first rotational axis 21, and the second stopper 18 abuts the second rotational axis 22, thereby maintaining the relative spatial configuration between the fan body 1 and the storage housing 2.

[0126] The fan assembly 3 is mounted on the fan body 1. The fan body 1 comprises a first housing 11 and a second housing 12. The fan assembly 3 includes a fan motor 31 and fan blades 32. A motor shaft hole 34 is defined in the first housing 11. The fan motor 31 is disposed within the first housing 11, with its motor shaft 33 inserted into and extending through the motor shaft hole 34. The fan blades 32 are disposed outside the first housing 11 and connected to the end of the motor shaft 33 that extends through the motor shaft hole 34.

[0127] In some embodiments, the fan body 1 can also be molded into a complete shell through an integrated molding process.

[0128] The end of the fan body 1 connected to the storage housing 2 is provided with a first shaft hole 13 and a second shaft hole 14. Both the first shaft hole 13 and the second shaft hole 14 are located at the junction of the first housing 11 and the second housing 12. However, the locations of the first shaft hole 13 and the second shaft hole 14 are not limited to this. Depending on the specific application scenario, in some embodiments, the first shaft hole 13 and the second shaft hole 14 can be located in the first housing 11 or the second housing 12. When the fan body 1 is an integrally molded structure, the first shaft hole 13 and the second shaft hole 14 can be located at any position on one end of the fan body 1.

[0129] A storage cavity is provided on the storage shell 2, and two ears (not marked) extend from one end of the storage shell 2 connected to the fan body 1. The two ears are respectively provided with a first rotating shaft 21 and a second rotating shaft 22 that cooperate with the first rotating shaft hole 13 and the second rotating shaft hole 14.

[0130] In some embodiments, the first rotating shaft 21 and the second rotating shaft 22 are disposed inside the receiving cavity.

[0131] The first rotating shaft 21 is inserted into the first rotating shaft hole 13, and the second rotating shaft 22 is inserted into the second rotating shaft hole 14. The first rotating shaft 21 and the second rotating shaft 22 rotate synchronously and in conjunction with each other in the first rotating shaft hole 13 and the second rotating shaft hole 14, respectively, to achieve a rotational connection between the fan body 1 and the storage housing 2, so that the fan body 1 can be stored in the storage cavity of the fan housing and can be rotated to be exposed outside the storage housing 2.

[0132] The first limiting member 17 and the second limiting member 18 are respectively in contact with the first rotating shaft 21 and the second rotating shaft 22. The contact relationship between the first limiting member 17 and the second limiting member 18 and the first rotating shaft 21 and the second rotating shaft 22 can be continuous or intermittent. When the first limiting member 17 and the second limiting member 18 are in contact with the first rotating shaft 21 and the second rotating shaft 22 continuously, the first limiting member 17 and the second limiting member 18 can maintain the relative spatial form of any angle between the fan body 1 and the storage shell 2. When the first limiting member 17 and the second limiting member 18 are in contact with the first rotating shaft 21 and the second rotating shaft 22 at intervals, as the position of the fan body 1 and the storage shell 2 changes, the first limiting member 17 and the second limiting member 18 are separated from the first rotating shaft 21 and the second rotating shaft 22. At this time, the first limiting member 17 and the second limiting member 18 do not have the function of maintaining the relative spatial form between the fan body 1 and the storage shell 2. As the positions of the fan body 1 and the storage shell 2 change, the first limit member 17 and the second limit member 18 abut against the first rotating shaft 21 and the second rotating shaft 22 again at intervals. At this time, the first limit member 17 and the second limit member 18 have the function of maintaining the relative spatial form between the fan body 1 and the storage shell 2.

[0133] In the above embodiment, two opposing axial holes are provided on the fan body 1, and two rotating shafts that match the axial holes are provided on the storage housing 2. When the two rotating shafts match the two axial holes, the fan body 1 and the storage housing 2 can rotate relative to each other. Two limiting members are provided in the fan body 1, and the two limiting members respectively abut against the first rotating shaft 21 and the second rotating shaft 22. The provision of the two limiting members, through the internal structure of the fan body 1, increases the interaction force between the fan body 1 and the storage housing 2, so that the relative spatial shape of the fan body 1 and the storage housing 2 remains more stable, and the shapes of the two are not easily changed by external forces, thereby facilitating the use of the portable fan.

[0134] Please refer to FIG15 , which is a schematic structural diagram of the storage shell of this embodiment.

[0135] As shown in Figure 15, the first rotating shaft 21 and the second rotating shaft 22 both include a plurality of connecting plates 221, which are arranged at intervals around to form a ring-shaped rotating shaft. The first limiting member 17 abuts against at least one connecting plate 221 of the first rotating shaft 21, and the second limiting member 18 abuts against at least one connecting plate 221 of the second rotating shaft 22.

[0136] The number of connecting plates 221 constituting the first rotating shaft 21 is 4. However, the number of connecting plates 221 of the first rotating shaft 21 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of connecting plates 221 constituting the first rotating shaft 21 can be (but not limited to): 2, 3, 5, or more.

[0137] The number of connecting plates 221 constituting the second rotating shaft 22 is 4. However, the number of connecting plates 221 of the second rotating shaft 22 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of connecting plates 221 constituting the second rotating shaft 22 can be (but not limited to): 2, 3, 5, or more.

[0138] The multiple connecting plates 221 of the first rotating shaft 21 enclose a hollow annular rotating shaft. Since the multiple connecting plates 221 are spaced apart from each other, when any one or more of the multiple connecting plates 221 are squeezed, the connecting plates 221 can be deformed toward the inside of the annular rotating shaft.

[0139] The multiple connecting plates 221 of the second rotating shaft 22 enclose and form a hollow annular rotating shaft. Since the multiple connecting plates 221 are spaced apart from each other, when any one or more of the multiple connecting plates 221 are squeezed, the connecting plates 221 can be deformed toward the inside of the annular rotating shaft.

[0140] The multiple connecting plates 221 that make up the first rotating shaft 21 and the second rotating shaft 22 are all spaced apart, so the abutment with the first limiting member 17 and the second limiting member 18 occurs at intervals. The spaced abutment between the first rotating shaft 21 and the second rotating shaft 22 and the first limiting member 17 and the second limiting member 18 can make the fan body 1 and the storage shell 2 have higher stability in a specific spatial position compared to other spatial positions. The friction loss between the first rotating shaft 21 and the second rotating shaft 22 and the first limiting member 17 and the second limiting member 18 is reduced, and the level change of damping when the user rotates the portable fan is improved, making it more convenient for the user to use. At the same time, the spaced connecting plates 221 can make the fan body 1 and the storage shell 2 have stronger stability at a specific position. This stability can be perceived by the user through the change in resistance, making it convenient for the user to rotate the portable fan to a predetermined position suitable for use.

[0141] Please refer to FIG. 16 , which is a partial enlarged schematic diagram of the second rotating shaft (A) of this embodiment.

[0142] As shown in Figure 16, an arc-shaped protrusion 222 is raised on the outer surface of each connecting plate 221 of the multiple connecting plates 221 of the first rotating shaft 21 and the second rotating shaft 22, and the first limiting member 17 abuts against at least one arc-shaped protrusion 222 of the first rotating shaft 21, and the second limiting member 18 abuts against at least one arc-shaped protrusion 222 of the second rotating shaft 22.

[0143] The provision of the arc-shaped protrusion 222 enables the fan body 1 and the storage shell 2 to rotate more smoothly, thereby reducing the friction between the arc-shaped protrusion 222 and the first limiting member 17 and the second limiting member 18 during the rotation process.

[0144] An arcuate boss 223 is raised on the outer surface of each of the plurality of connecting plates 221 , and an arcuate protrusion 222 is provided on the arcuate boss 223 . The arcuate boss 223 and the arcuate protrusion 222 form a stepped structure.

[0145] The stacked stepped structure of the curved boss 223 and the curved protrusion 222 allows for a smoother transition during rotation of the portable fan. As the first rotating shaft 21 and the second rotating shaft 22 rotate with the portable fan, the first stopper 17 and the second stopper 18 first contact the surface of the curved boss 223 on the connecting plate 221, then smoothly transition along the surface of the curved boss 223 to contact the surface of the curved protrusion 222. During this process, since both the curved boss 223 and the curved protrusion 222 are curved surfaces, the transition during rotation is smoother. Furthermore, the curved boss 223 raises the height of the curved protrusion 222, making the contact between the curved protrusion 222 and the first stopper 17 and the second stopper 18 more stable.

[0146] Each of the multiple connecting plates 221 is configured in an arc shape. The first rotating shaft 21 and the second rotating shaft 22 formed by the arc-shaped connecting plates 221 are more rounded, avoiding the sense of hysteresis during the rotation of the folding fan and making the rotation of the folding fan smoother. However, the shape of the connecting plates 221 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the connecting plates 221 can be (but not limited to) triangular, rectangular, cylindrical, or semi-cylindrical, etc.

[0147] Please refer to FIG. 17 , which is a schematic diagram of the exploded structure of the portable fan of this embodiment.

[0148] As shown in Figure 17, the portable fan also includes: a first connecting buckle 15 and a second connecting buckle 16, one end of the first connecting buckle 15 is inserted in the middle of the multiple connecting plates 221 of the first rotating shaft 21, and the other end of the first connecting buckle 15 is located on the outer surface of the storage shell 2, one end of the second connecting buckle 16 is inserted in the middle of the multiple connecting plates 221 of the second rotating shaft 22, and the other end of the second connecting buckle 16 is located on the outer surface of the storage shell 2.

[0149] During the rotation of the folding fan, the connecting plate 221, squeezed by the first and second stoppers 17 and 18, bends toward the interior of the annular shaft. Excessive deformation during this bending process can damage the connecting plate 221, resulting in a lack of resilience and difficulty in returning to its original position. This, in turn, reduces the ability to maintain the relative spatial configuration between the fan body 1 and the housing 2. The first and second connecting buckles 15 and 16, inserted between the connecting plate 221, prevent the connecting plate 221 from deforming excessively, connecting the first and second shafts 21 and 22.

[0150] The first connecting buckle 15 and the second connecting buckle 16 both include: buckle caps 151, 161, first elastic strips 152, 162 and second elastic strips 153, 163. The first elastic strips 152, 162 and the second elastic strips 153, 163 are both connected to one side of the buckle caps 151, 161, and there is a gap between the first elastic strips 152, 162 and the second elastic strips 153, 163.

[0151] Please refer to FIG. 18 , which is a schematic structural diagram of the first connecting buckle of this embodiment.

[0152] As shown in FIG18 , in this embodiment, the buckle caps 151 and 161 are configured in an arc shape. However, the shape of the buckle caps 151 and 161 is not limited to this. Depending on the specific application scenario, in some embodiments, the buckle caps 151 and 161 can be (but not limited to) cylindrical, prismatic, racetrack-shaped, or irregularly shaped.

[0153] The arrangement of the buckle caps 151 and 161 can prevent external dust or debris from entering the fan body 1 through the annular rotating shaft, thereby effectively protecting the internal structure of the fan body 1 from being damaged and contaminated.

[0154] The arrangement of the first elastic strips 152, 162 and the second elastic strips 153, 163 enables the first elastic strips 152, 162 and the second elastic strips 153, 163 to deform when squeezed. When the folding fan rotates, the connecting plate 221 bends toward the inside of the annular rotating shaft after being squeezed by the first limiter 17 and the second limiter 18. During this bending and deformation process, the connecting plate 221 contacts the first elastic strips 152, 162 or the second elastic strips 153, 163 and pushes the first elastic strips 152, 162 or the second elastic strips 153, 163 to deform. During the recovery process, the first elastic strips 152, 162 or the second elastic strips 153, 163 provide a restoring force to the connecting plate 221, allowing the connecting plate 221 to better return to its original position, reducing the risk of the connecting plate 221 being unable to recover from bending fatigue due to long-term repeated bending, thereby extending the rotation life of the folding fan.

[0155] The suspended ends of the first elastic strips 152, 162 and the second elastic strips 153, 163 are both provided with a latch 5. The provision of the latch 5 can prevent the first connecting buckle 15 and the second connecting buckle 16 from falling off, thereby enhancing the stability between the first connecting buckle 15 and the second connection and the first rotating shaft 21 and the second rotating shaft 22.

[0156] A positioning groove 19 is provided on the side surface of the buckle caps 151 and 161 facing the storage housing 2. The surface of the storage housing 2 facing the buckle caps 151 and 161 is recessed to form a buckle ring groove 23. A positioning protrusion 231 corresponding to the positioning groove 19 is provided in the buckle ring groove 23. The provision of the buckle ring groove 23 can make the connection between the buckle caps 151 and 161 and the surface of the storage housing 2 smoother, and the gap between the buckle caps 151 and 161 and the storage housing 2 is smaller, thereby improving the dustproof effect. The provision of the positioning groove 19 and the positioning protrusion 231 can make the assembly of the buckle caps 151 and 161 easier, and can also prevent the buckle caps 151 and 161 from being rotated by external forces, resulting in friction between the buckle caps 151 and 161 and the surface of the storage housing 2, causing damage.

[0157] The first limiting member 17 and the second limiting member 18 both include: first clamping grooves 171, 181 and second clamping grooves 172, 182. The first clamping groove 171 and the second clamping groove 172 of the first limiting member 17 are relatively distributed on both sides of the first rotating shaft 21 and respectively abut against the first rotating shaft 21. The first clamping groove 181 and the second clamping groove 182 of the second limiting member 18 are relatively distributed on both sides of the second rotating shaft 22 and respectively abut against the second rotating shaft 22.

[0158] The first engaging grooves 171, 181 and the second engaging grooves 172, 182 can be arranged along the length direction or the thickness direction of the fan body 1. However, the arrangement direction of the first engaging grooves 171, 181 and the second engaging grooves 172, 182 is not limited thereto. In some embodiments, the first engaging grooves 171, 181 and the second engaging grooves 172, 182 can be arranged at any angle within a 360° circumferential range of the first rotating shaft 21 and the second rotating shaft 22.

[0159] The first engaging grooves 171, 181 and the second engaging grooves 172, 182 can be formed on the inner surface of the fan body 1 or can be protruded from the inner surface of the fan body 1. The first engaging grooves 171, 181 and the second engaging grooves 172, 182 can also be provided on internal components of the fan body 1. For example, when the fan body 1 includes a first housing 11 and a second housing 12, the second housing 12 is provided with an engaging structure for engaging the first engaging grooves 171, 181 or the second engaging grooves 172, 182 are provided on the engaging structure.

[0160] The provision of the first engaging grooves 171, 181 and the second engaging grooves 172, 182 increases the contact area between the first and second limiting members 17, 18 and the first and second rotating shafts 21, 22, thereby increasing the force of the abutment and further stabilizing the relative spatial configuration between the fan body 1 and the storage housing 2 during abutment. Furthermore, the grooved structure generates a localized clamping force on the first and second rotating shafts 21, 22 when abutting against them, further improving the stability of the relative spatial configuration between the fan body 1 and the storage housing 2 during abutment.

[0161] When the first engaging grooves 171 , 181 and the second engaging grooves 172 , 182 are used in conjunction with the arc-shaped protrusion 222 , a portion of the structure of the arc-shaped protrusion 222 can be inserted into the grooves, thereby further stabilizing the relative spatial form between the fan body 1 and the storage shell 2 .

[0162] The first engaging grooves 171, 181 and the second engaging grooves 172, 182 are each composed of a first limiting bar (not labeled) and a second limiting bar (not labeled) disposed inside the fan body 1. The first limiting bar and the second limiting bar are parallel to each other. However, the structure of the first engaging grooves 171, 181 and the second engaging grooves 172, 182 is not limited thereto. In some embodiments, the first engaging grooves 171, 181 and the second engaging grooves 172, 182 can be (but not limited to): a U-shaped groove, a C-shaped groove, a wedge-shaped groove, etc.

[0163] The first and second engaging slots 171, 181, 172, 182 are each composed of a first and second limiting strips disposed within the fan body. A reinforcing plate 4 is disposed on opposite sides of the first and second limiting strips. The reinforcing plate 4 is connected to the inner surface of the fan body, and its height is less than that of the first and second limiting strips. The provision of the reinforcing plate 4 enhances the physical strength of the first and second limiting strips, strengthens the engagement force of the first and second engaging slots 171, 181, 172, 182, and improves the stability of the portable fan. Furthermore, because the height of the reinforcing plate 4 is less than that of the first and second limiting strips, no reinforcement is applied at the locations where the first and second engaging slots 171, 181, 172, 182 abut against the first rotating shaft 21 or the second rotating shaft 22. This prevents the problem of severe frictional damage caused by excessive physical strength at the abutment locations of the first and second engaging slots 171, 181, 172, 182, thereby improving the service life of the portable fan.

[0164] Example 4

[0165] In the hot summer, fans have become a must-have item for people to eliminate the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0166] Portable fans are popular due to their compact size and portability. The applicant of this application discovered during research that, due to the diverse electrical functions of existing portable fans, a large number of electronic components are often required to achieve these functions. This large number of electronic components requires placement on a larger circuit board or a denser arrangement of the electronic components. However, an overly large circuit board can affect the overall size of the portable fan, and an overly dense arrangement of electronic components can exacerbate electronic interference between components, leading to more severe heat generation.

[0167] Please refer to Figures 19 and 20. Figure 19 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 20 is a schematic diagram of the exploded structure of the portable fan of this embodiment.

[0168] As shown in Figures 19 and 20, a portable fan includes: a fan body 1, a first PCB circuit board 2, a second PCB circuit board 3, electronic components 4, and a rechargeable battery 8. The fan body 1 is provided with a fan assembly 5 for blowing air; the first PCB circuit board 2 is disposed within the fan body 1 along its length, and the fan assembly 5 is electrically connected to the first PCB circuit board 2; the second PCB circuit board 3 intersects and plugs into the first PCB circuit board 2, and the second PCB circuit board 3 is electrically connected to the first PCB circuit board 2; the electronic components 4 are disposed on the first PCB circuit board 2 and / or the second PCB circuit board 3; and the rechargeable battery 8 is disposed within the fan body 1 and is electrically connected to the first PCB circuit board 2.

[0169] The fan assembly 5 is mounted on the fan body 1. The fan body 1 comprises a first housing 11 and a second housing 12. The fan assembly 5 includes a fan motor 51 and fan blades 52. The first housing 11 defines a shaft hole 54. The fan motor 51 is mounted within the first housing 11, with its shaft 53 inserted into and extending through the shaft hole 54. The fan blades 52 are mounted outside the first housing 11 and connected to the end of the shaft 53 extending through the shaft hole 54.

[0170] In some embodiments, the fan body 1 can also be molded into a complete shell through an integrated molding process.

[0171] Please refer to FIG. 21 , which is a schematic structural diagram of the first shell of this embodiment.

[0172] As shown in FIG21 , a housing cavity 13 is defined in the fan body 1 , and a first PCB circuit board 2 is disposed in the housing cavity 13 and along the length of the housing cavity 13 . A second PCB circuit board 3 is disposed between the first PCB circuit board 2 and the inner surface of the housing cavity 13 .

[0173] In some embodiments, when the fan body 1 includes a first housing 11 and a second housing 12, a receiving cavity 13 is defined in the first housing 11, and the first PCB circuit board 2 is disposed within the receiving cavity 13 and along the length of the receiving cavity 13. The second PCB circuit board 3 is disposed between the first PCB circuit board 2 and the inner surface of the first housing 11.

[0174] The spatial position relationship between the first PCB circuit board 2 and the second PCB circuit board 3 is an intersection, so the first PCB circuit board 2 and the second PCB circuit board 3 can be plugged vertically, plugged at an acute angle, or plugged at an obtuse angle.

[0175] The electronic components 4 in this embodiment can be (but are not limited to): chips, resistors, capacitors, inductors, potentiometers, interface sockets 41, charging interfaces 42, LED signal lights 43 or push-button switches 44, etc.

[0176] The rechargeable battery 8 is disposed between the accommodating cavity 13 and the fan assembly 5 . In some embodiments, one end of the rechargeable battery 8 is mounted above the accommodating cavity 13 .

[0177] The first PCB circuit board 2 is electrically connected to the fan assembly 5 via a wire or a flexible printed circuit.

[0178] The first PCB circuit board 2 and the second PCB circuit board 3 are electrically connected via a wire, a flexible printed circuit or solder.

[0179] The rechargeable battery 8 is electrically connected to the first PCB circuit board 2 via a wire or a flexible printed circuit.

[0180] In the above embodiment, a first PCB 2 and a second PCB 3 are arranged within the fan body 1. The first PCB 2 is arranged along the length of the fan body 1. Due to the long length of the fan body 1, this arrangement maximizes space utilization within the fan body 1. The second PCB 3 is intersectingly plugged onto the first PCB 2. This intersecting connection eliminates the need for the second PCB 3 to occupy space along the length of the fan body 1. Instead, it occupies the space between the first and second PCBs, thereby improving internal space utilization within the fan body 1. The arrangement of the first PCB 2 and the second PCB 3 increases the overall PCB area, reduces the density of the electronic components 4 within the fan body 1, increases the heat dissipation space for the electronic components 4, improves heat dissipation efficiency, and reduces electromagnetic interference between the electronic components 4. At the same time, since the first PCB circuit board 2 and the second PCB circuit board 3 intersect in space, the internal space of the fan body 1 is rationally utilized, making the volume of the fan body 1 more compact, and the spatial distance between the electronic components 4 arranged on the first PCB circuit board 2 and the second PCB circuit board 3 is increased, further reducing the electromagnetic interference intensity between the electronic components 4.

[0181] An inserting slot 21 is defined on the first PCB circuit board 2 , and one end of the second PCB circuit board 3 is vertically inserted into the inserting slot 21 .

[0182] Please refer to FIG. 22 , which is a schematic diagram of the connection structure between the first PCB circuit board and the second PCB circuit board in this embodiment.

[0183] As shown in FIG. 22 , in some embodiments, an inserting tongue 31 extends from one end of the second PCB circuit board 3 that is plugged into the first PCB circuit board 2 , and the inserting tongue 31 is inserted into the inserting slot 21 .

[0184] The first PCB 2 is provided with a socket 21, into which the second PCB 3 is inserted. This socket 21 facilitates the connection of the second PCB 3 to the first PCB 2. Furthermore, the socket 21 allows the second PCB 3 to be exposed on both sides of the first PCB 2, making it easier to secure the second PCB 3 from both sides.

[0185] The second PCB circuit board 3 is fixedly connected to the first PCB circuit board 2 by welding, and the circuits on the second PCB circuit board 3 are connected to the circuits on the first PCB circuit board 2 by welding.

[0186] The second PCB circuit board 3 is fixed to the first PCB circuit board 2 by soldering. The soldering point is located at the connection position between the second PCB circuit board 3 and the plug-in slot 21. The soldering position can be located at the connection position on one side or at the connection position on both sides.

[0187] The circuits on the second PCB circuit board 3 and the circuits on the first PCB circuit board 2 are also electrically connected by soldering.

[0188] Soldering can not only fix the second PCB circuit board 3 on the first PCB circuit board 2, but also connect the circuits between the first PCB circuit board 2 and the second PCB circuit board 3, saving wires and making the electrical connection more stable.

[0189] In some embodiments, the first PCB 2 and the second PCB 3 can be fixed together by (but not limited to) gluing, interference fit, or the like. When connected by gluing or interference fit, the first PCB 2 and the second PCB 3 are electrically connected via wires or a flexible printed circuit.

[0190] In some embodiments, the first PCB circuit board 2 and the second PCB circuit board 3 do not need to be connected through the plug tongue 31 and the plug slot 21, and the first PCB circuit board 2 and the second PCB circuit board 3 can be directly fixed by gluing or soldering.

[0191] Multiple support frames 118 are provided on the inner surface of the fan body 1. These support frames 118 abut against the first PCB 2. These support frames 118 are arranged around the first PCB 2. The support provided by these support frames 118 ensures greater stability during assembly of the first PCB 2. Furthermore, the structure formed by these support frames 118 positions the first PCB 2, facilitating assembly.

[0192] A first fixing bracket 115 and a second fixing bracket 116 are provided inside the fan body 1 , and the first PCB circuit board 2 is mounted on the first fixing bracket 115 and the second fixing bracket 116 .

[0193] A first threaded hole (not shown) is defined on the first fixing bracket 115, a second threaded hole (not shown) is defined on the second fixing bracket 116, a first fixing hole 22 is defined at a position corresponding to the first threaded hole, and a second fixing hole 23 is defined at a position corresponding to the second threaded hole on the first PCB circuit board 2. The first fixing hole 22 is fixed to the first threaded hole by a first screw 24, and the second fixing hole 23 is fixed to the second threaded hole by a second screw 25.

[0194] In some embodiments, the first PCB circuit board 2 and the first fixing bracket 115 and the second fixing bracket 116 can be fixed by (but not limited to) gluing or riveting.

[0195] The provision of the first fixing bracket 115 and the second fixing bracket 116 can make the first PCB circuit board 2 more stably fixed.

[0196] Please refer to FIG. 23 , which is a schematic diagram of the connection structure of the first PCB circuit board, the second PCB circuit board, and the electronic components in this embodiment.

[0197] As shown in Figure 23, in some embodiments, the electronic component 4 includes: an interface socket 41, the interface socket 41 is connected to the first PCB circuit board 2, and the fan body 1 has a first opening 111 at a position corresponding to the interface socket 41, and the interface socket 41 is connected to the outside through the first opening 111.

[0198] The interface socket 41 is a USB interface socket 41. The interface socket 41 is fixed to the first PCB circuit board 2 by welding and is used to charge an external electronic terminal. In this embodiment, the portable fan can be used as a power bank to charge an external electronic terminal. The external electronic terminal is electrically connected to the interface socket 41 via a USB charging cable and charged.

[0199] In some embodiments, the electronic component 4 further includes: a charging interface 42, the charging interface 42 is connected to the second PCB circuit board 3, and the fan body 1 has a second opening 112 at a position corresponding to the charging interface 42, and the charging interface 42 is connected to the outside through the second opening 112.

[0200] In this embodiment, the charging interface 42 is a Type-C interface. However, the type of the charging interface 42 is not limited to this. Depending on the specific application scenario, in some embodiments, the charging interface 42 is a USB interface.

[0201] The charging interface 42 is fixed to the second PCB circuit board 3 by welding. The charging interface 42 is fixed to the second PCB circuit board 3, which can avoid placing a bracket on the charging interface 42, simplifying the fixing method of the charging interface 42, and at the same time, making the fixing of the charging interface 42 more stable.

[0202] The charging interface 42 is used to charge the rechargeable battery 8 , and the rechargeable battery 8 can be charged by connecting it to an external power source through a charging cable.

[0203] In some embodiments, the charging interface 42 can be fixed on the first PCB circuit board 2 .

[0204] Please refer to FIG. 24 , which is a schematic diagram of the connection structure of the first PCB circuit board, the second PCB circuit board and some electronic components in this embodiment.

[0205] As shown in Figure 24, in some embodiments, the electronic component 4 also includes: an LED signal light 43, the LED signal light 43 is connected to the first PCB circuit board 2 or the second PCB circuit board 3, and the fan body 1 has a third opening 113 at the position corresponding to the LED signal light 43, and the LED signal light 43 is connected to the outside through the third opening 113.

[0206] The LED signal light 43 is fixed to the first PCB circuit board 2 by welding. However, the fixing method of the LED signal light 43 is not limited thereto. Depending on the specific application scenario, in some embodiments, the LED signal light 43 is fixed to the second PCB circuit board 3 by welding.

[0207] The portable fan further comprises a lamp body bracket 7, and the LED signal light 43 is snapped onto the lamp body bracket 7. In order to prevent the LED signal light 43 from falling into the fan body from the third opening 113 after being squeezed by external force, the lamp body bracket 7 is provided to support the LED signal light 43.

[0208] One end of the lamp bracket 7 abuts the first PCB circuit board 2, and the other end of the lamp bracket 7 abuts the inner surface of the fan body 1. The abutment between the lamp bracket 7, the first PCB circuit board 2, and the inner surface of the fan body 1 can improve the stability of the lamp bracket 7 and better support the LED signal light 43.

[0209] The lamp body bracket 7 has a snap-in slot 72 on both sides, and the fan body 1 is provided with a snap-in piece 117 at a position corresponding to the snap-in slot 72. The snap-in slot 72 is engaged with the snap-in piece 117. The snap-in slot 72 is provided on the lamp body bracket 7 to prevent the lamp body bracket 7 from tipping over to the left or right, making the lamp body bracket 7 more stable.

[0210] The LED signal light 43 has two metal legs, which connect to the first PCB 2 or the second PCB 3 via these legs. A slot is defined on one side of the lamp body bracket 7 for the two metal legs to pass through, and the second PCB 3 is positioned within this slot. This maximizes space utilization and makes the portable fan even more compact. Furthermore, the second PCB 3 and the lamp body bracket 7 provide mutual support, enhancing their stability and preventing them from tilting to the left or right.

[0211] The lamp bracket 7 is covered with a light shield 71, which is located on the side of the lamp bracket 7 facing the interface socket 41. However, the location of the light shield 71 is not limited to this. Depending on the specific application scenario, in some embodiments, the light shield 71 is located on the storage slot. The light shield 71 is a sheet-like structure made of (but not limited to) light-shielding cotton, plastic, or metal sheet. The provision of the light shield 71 can prevent the light of the LED signal light 43 from leaking and affecting the overall appearance of the portable fan.

[0212] In some embodiments, the portable fan further includes: a control button 6, a key switch 44 is provided on the first PCB circuit board 2, the control button 6 is in contact with the key switch 44, and a fourth opening 114 is provided on the fan body at a position corresponding to the control button 6, and the control button 6 is arranged in the fourth opening 114.

[0213] Example 5

[0214] In the hot summer, fans have become a must-have item for people to eliminate the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0215] As fans become increasingly portable, they are integrating more and more functional components into them to accommodate a wide range of user needs, beyond just ventilation. Prior art incorporates light-emitting elements into fans to facilitate their use in dimly lit environments. Specifically, holes are created in the fan housing, and the light-emitting elements are mounted directly into these holes.

[0216] The applicant of this application discovered during research that, in the prior art, light-emitting elements are directly mounted in holes provided in the fan housing. This makes them susceptible to scratches and friction with external contact objects, causing damage. Furthermore, when subjected to external pressure, the light-emitting elements can shift inwards into the fan housing, or even fall out of the holes in the fan housing and enter the interior of the fan housing, affecting the normal use of the light-emitting elements. The displacement of the light-emitting elements can also create gaps between them and the holes in the fan housing, allowing dust and other foreign matter to enter the fan housing, affecting the cleanliness of the environment within the fan housing.

[0217] Please refer to Figures 25 and 26. Figure 25 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 26 is a schematic diagram of the exploded structure of the portable fan of this embodiment.

[0218] As shown in Figures 25 and 26, a portable fan comprises a fan body 1, a flexible connector 2, and a light-emitting element 3. The fan body 1 is provided with a fan assembly 4; the fan body 1 is provided with an assembly opening 11, on which the flexible connector 2 is mounted; the flexible connector 2 is provided with a light source hole 21, within which the light-emitting element 3 is mounted; and a limit member 5 is provided within the fan body 1, abutting against the light-emitting element 3.

[0219] In this embodiment, the fan body 1 includes a first housing 12 and a second housing 13, which are connected by a snap-fit ​​connection. However, the connection between the first housing 12 and the second housing 13 is not limited to this. Depending on the specific application scenario, in some embodiments, the first housing 12 and the second housing 13 can be fixed by (but not limited to) gluing, screwing, riveting, etc.

[0220] The fan assembly 4 includes a fan motor 41 and fan blades 42. A shaft hole 44 is defined in the first housing 12. The fan motor 41 is disposed within the first housing 12, with a rotating shaft 43 of the fan motor 41 inserted into and extending through the shaft hole 44. The fan blades 42 are disposed outside the first housing 12 and connected to the end of the rotating shaft 43 that extends through the shaft hole 44.

[0221] In some embodiments, the fan body 1 can be manufactured through an integral molding technology, and the fan body 1 is an inseparable structure.

[0222] In this embodiment, the assembly opening 11 is provided at the end of the fan body 1 facing away from the fan assembly 4. The assembly opening 11 is formed by notches in the first shell 12 and the second shell 13. In some embodiments, when the fan body 1 is manufactured using an integral molding process, the assembly opening 11 is directly provided at the end of the fan body 1.

[0223] The shape of the assembly opening 11 is circular. However, the shape of the assembly opening 11 is not limited thereto, and depending on the specific application scenario, the shape of the assembly opening 11 can be (but not limited to): polygonal, elliptical, racetrack, etc.

[0224] The flexible connector 2 is made of soft rubber, silicone rubber or fluororubber.

[0225] The light emitting element 3 can be (but is not limited to): an LED lamp bead 31, a spherical bulb, a laser generator, a purple light lamp or a colored light or other devices.

[0226] In the above embodiment, an assembly opening 11 is provided on the fan body 1, and the assembly opening 11 is connected to the flexible connector 2. The flexible connector 2 is provided with a light source hole 21, and the light-emitting element 3 is provided in the light source hole 21. The flexible connector 2 can protect the light-emitting element 3 provided in the light source hole 21, preventing the light-emitting element 3 from direct contact with the external environment, thereby reducing the probability of damage to the light-emitting element 3 due to scratches and friction. A limiter 5 is provided in the fan body 1, and the limiter 5 and the light-emitting element 3 abut against each other. When the light-emitting element 3 is subjected to external pressure, the limiter 5 will provide support to the light-emitting element 3, thereby preventing the light-emitting element 3 from retreating or falling from the light source hole 21 into the interior of the fan body 1. At the same time, the support of the limiter 5 prevents the light-emitting element 3 from retreating, and the tight fit of the flexible connector 2 makes it difficult for a gap to appear between the light-emitting element 3 and the light source hole 21, effectively preventing external dust and foreign matter from entering the fan body 1, thereby ensuring the cleanliness of the fan body 1.

[0227] A snap ring 14 is provided in the assembly opening 11 , a snap groove 22 is provided on the flexible connector 2 , and the flexible connector 2 is connected to the snap ring 14 via the snap groove 22 .

[0228] Please refer to FIG. 27 , which is a schematic diagram of the flexible connector structure of this embodiment.

[0229] As shown in Figure 27 , the flexible connector 2 is provided with a snap-fitting groove 22, which engages with the snap-fitting ring 14 on the assembly opening 11. The snap-fitting groove 22 and snap-fitting ring 14 provide a tighter connection between the flexible connector 2 and the assembly opening 11, making it less likely to fall when subjected to external forces. Therefore, the provision of the snap-fitting ring 14 and snap-fitting groove 22 enhances the strength and stability of the connection between the flexible connector 2 and the fan body 1.

[0230] The flexible connector 2 includes: a first connector 23 and a second connector 24. The first connector 23 and the second connector 24 are respectively located on both sides of the clamping groove 22. One side surface of the first connector 23 is exposed outside the fan body 1. The second connector 24 is located inside the fan body 1. The volume of the second connector 24 is larger than that of the first connector 23.

[0231] Specifically, the first connecting member 23 is configured in a circular ring shape, and the second connecting member 24 is configured in a racetrack shape. However, the shapes of the first connecting member 23 and the second connecting member 24 are not limited thereto and can vary with the shape of the fan body 1. For example, when the fan body 1 is in the shape of a rectangular parallelepiped, the first connecting member 23 and the second connecting member 24 can be in the shape of a square.

[0232] When an external force acts on the first connector 23 by pulling, the flexible connector 2 is easily deformed and pulled out of the assembly opening 11 by the external force. The second connector 24 is larger than the first connector 23 and is disposed within the fan body 1. When subjected to a large pulling force, the second connector 24 is too large to be compressed to a size suitable for entering and exiting the assembly opening 11, thereby preventing the flexible connector 2 from being pulled out. Therefore, the size ratio of the first connector 23 to the second connector 24 can reduce the chance of the flexible connector 2 being disengaged and improve the stability of the connection between the flexible connector 2 and the fan body 1.

[0233] The flexible connector 2 extends into the light source hole 21 to form a limit stop edge 27 , and the limit stop edge 27 abuts against one end of the light emitting element 3 facing the external environment.

[0234] The provision of the stop edge 27 effectively prevents the light-emitting element 3 from falling out of the light source hole 21 and from inside the fan body 1 to the outside. Furthermore, the stop edge 27 prevents the light-emitting element 3 from protruding from the surface of the fan body 1 or from being exposed outside the flexible connector 2, thereby providing a buffering and protective effect for the light-emitting element 3. For example, if the portable fan is dropped and the flexible connector 2 contacts the ground, the light-emitting element 3, prevented from protruding from the surface of the flexible connector 2 by the stop edge 27, can act as a buffer during the collision, protecting the light-emitting element 3 from damage.

[0235] The position-limiting stop edge 27 is configured as an annular stop edge. However, the shape of the position-limiting stop edge 27 is not limited thereto. Depending on the specific application scenario, in some embodiments, the position-limiting stop edge 27 can be a raised bump, a bump, or an arcuate stop edge.

[0236] Please refer to FIG. 28 , which is a schematic diagram of the light emitting element structure of this embodiment.

[0237] As shown in FIG28 , in some embodiments, the light-emitting element 3 includes: an LED lamp bead 31 and a connecting plate 32 . The LED lamp bead 31 is arranged on the connecting plate 32 . The LED lamp bead 31 is inserted into the light source hole 21 . The limiting member 5 and the connecting plate 32 abut against each other.

[0238] The LED lamp beads 31 are mounted on the connecting plate 32. Due to the flat surface of the connecting plate 32, when it contacts the stopper 5, the contact surface is larger and the force is more evenly distributed, thus being able to withstand a greater contact force. Furthermore, the arrangement of the connecting member prevents the LED lamp beads 31 from directly contacting the stopper 5, thereby better protecting the LED lamp beads 31.

[0239] The length of the connecting plate 32 is greater than the diameter of the light source hole 21 , so that the connecting plate 32 is mounted on both sides of the light source hole 21 .

[0240] The length of the connecting plate 32 is greater than the diameter of the light source hole 21, so both ends of the connecting plate 32 can span the light source hole 21. This structure can further prevent the light-emitting element 3 from falling out of the light source hole 21. The connecting plate 32, combined with the limit stop 27, provides dual resistance to external forces pulling on the light-emitting element 3, providing better protection.

[0241] The flexible connector 2 is provided with a receiving groove 25, within which the connecting plate 32 is disposed. The provision of the receiving groove 25 prevents the connecting plate 32 from protruding from the surface of the flexible connector 2, effectively utilizing the available space. This creates a more rational spatial arrangement between the connecting plate 32 and the flexible connector 2, thereby improving space utilization within the fan body 1. Furthermore, the provision of the receiving groove 25 serves to position the connector, preventing the connector from wobbling under external forces. This, in turn, prevents the light-emitting element 3 from wobbling, thereby enhancing its stability.

[0242] The flexible connector 2 is recessed at one end of the receiving slot 25 to form a wiring slot 26 , the LED lamp beads 31 are electrically connected to the connecting plate 32 , and the wires on the connecting plate extend from the wiring slot to the flexible connector.

[0243] The provision of the wiring groove 26 enables the wires connecting the light-emitting elements 3 to pass through the wiring groove 26 between the connecting plate 32 and the flexible connector 2, rationally utilizing the spatial structure of the flexible connector 2 and the connecting plate 32 and improving space utilization. The LED lamp beads 31 are electrically connected to the connecting plate 32, and the wires only need to be connected to the connecting plate 32 to supply power to the LED lamp beads 31, thereby shortening the length of the wires. At the same time, the wires do not need to be directly connected to the LED lamp beads 31, but are fixed to the connecting plate 32 by welding, making the connection of the wires more stable. The electrical connection between the connecting plate 32 and the LED lamp beads 31 enables the connecting plate 32 and the LED lamp beads 31 to be connected by welding and fixing, thereby improving the electrical connection stability between the connecting plate 32 and the LED lamp beads 31, while also improving the physical connection stability between the connecting plate 32 and the LED lamp beads 31.

[0244] The connecting plate 32 is made of a metal plate. However, the material of the connecting plate 32 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connecting plate 32 can be made of (but not limited to) plastic, wood, or fiberboard. For example, when there is no electrical connection between the connecting plate 32 and the LED lamp beads 31, the connecting plate 32 can be made of hard plastic.

[0245] One end of the limiting member 5 is connected to the inner surface of the fan body 1, and the other end of the limiting member 5 is suspended in the air. This structure of the limiting member 5 facilitates the disassembly of the fan body 1.

[0246] The connection relationship between the limiting member 5 and the fan body 1 can be (but not limited to): integral manufacturing, gluing, clamping, screwing or riveting.

[0247] Specifically, one end of the limiting member 5 is connected to the inner surface of the second shell 13 , and the other end extends toward the first shell 12 and is suspended in the air.

[0248] Please refer to FIG. 29 , which is a schematic structural diagram of the second shell and the first limiting member in this embodiment.

[0249] As shown in FIG. 29 , the limiting member 5 includes a first limiting plate 57 and a second limiting plate 58 . The first limiting plate 57 and the second limiting plate 58 are cross-connected, and the first limiting plate 57 abuts against the light emitting element 3 .

[0250] The intersecting structure of the first limiting plate 57 and the second limiting plate 58 enhances the spatial stability of the limiting member 5, preventing a single limiting plate from bending due to a lack of lateral structural support when subjected to lateral forces, thereby improving the spatial stability of the limiting member 5. Furthermore, the intersecting structure enables the first limiting plate 57 to transmit the force applied to the second limiting plate 58, thereby increasing the strength of the first limiting plate 57.

[0251] Please refer to FIG30 , which is a schematic diagram of the second structure of the position-limiting member of this embodiment.

[0252] As shown in FIG30 , in some embodiments, the position limiting member 5 includes a position limiting body 51, which is detachably connected to the fan body 1. The detachable connection between the position limiting body 51 and the fan body 1 facilitates partial replacement of the position limiting body 51, thereby improving the interchangeability of the portable fan components.

[0253] The two side edges of the limiting body 51 facing the light-emitting element 3 are raised to form a first abutment strip 52 and a second abutment strip 53, and the end of one suspended end of the limiting body 51 is raised to face the light-emitting element 3 to form an abutment block 54. The first abutment strip 52, the second abutment strip 53 and the abutment block 54 are respectively in abutment with the light-emitting element 3.

[0254] The side of the position-limiting body 51 facing the connecting plate 32 or light-emitting element 3 is raised to form three abutment structures: a first abutment bar 52, a second abutment bar 53, and an abutment block 54. These three abutment structures are arranged in a "pin-shaped" pattern. The arrangement of the first abutment bar 52, the second abutment bar 53, and the abutment block 54 increases the contact area between the position-limiting member 5 and the connecting plate 32 or light-emitting element 3, improving the stability of the abutment.

[0255] The limiting body 51 extends on both sides to form a first wing 55 and a second wing 56. A first limiting groove (not shown) and a second limiting groove (not shown) are respectively provided on the two opposite side walls of the fan body 1. The first wing 55 is inserted into the first limiting groove, and the second wing 56 is inserted into the second limiting groove.

[0256] The interlocking structure between the first and second wing portions 55, 56, and the first and second limiting grooves prevents deflection of the limiting body 51 that could disrupt its existing posture when subjected to lateral forces, thereby increasing the spatial stability of the limiting body 51. Furthermore, when the light-emitting element 3 is subjected to compressive force, the first and second limiting grooves, together with the connection between the limiting body 51 and the fan body 1, form a three-point force-bearing structure, thereby increasing the support provided by the limiting member 5 on the light-emitting element 3 and limiting the force applied to the limiting member 5.

[0257] The connection between the limiting body 51 and the fan body 1 is via screws. For example, the limiting body 51 may have a connecting screw hole (not shown), and the fan body 1 may have a threaded hole (not shown). The screws are inserted through the connecting screw hole and the threaded hole to removably secure the limiting body 51 to the fan body 1. However, the connection between the limiting body 51 and the fan body 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the limiting body 51 and the fan body 1 may be connected via a snap-fit ​​connection or an interference fit.

[0258] Please refer to FIG. 31 , which is a schematic structural diagram of the second shell and the third limiting member of this embodiment.

[0259] As shown in FIG31 , in some embodiments, the stopper 5 is constructed as an inverted L-shaped sheet. The inverted L-shaped structure can provide a larger contact area between the stopper 5 and the second housing 13 , thereby increasing the physical strength of the stopper 5 .

[0260] Example 6

[0261] Portable fans are popular due to their compact size and portability. The applicant of this application discovered during research that the connection between the rotating shaft and fan blades of portable fans generally utilizes a locking mechanism, making disassembly and assembly of the fan blades very inconvenient. Furthermore, when the fan motor speed of a portable fan is constant, the air output efficiency is primarily related to the area of ​​the fan blades. To achieve higher air output efficiency, the fan blades are typically made larger. Consequently, the size of the fan blades limits the size of the portable fan.

[0262] Please refer to Figures 32 and 33. Figure 32 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 33 is a schematic diagram of the exploded structure of the portable fan of this embodiment.

[0263] As shown in Figures 32 and 33, a portable fan comprises: a fan body 1, a blade base 3, a first blade 4, and a second blade 5. A fan motor 2 is disposed within the fan body 1, with one end of a rotating shaft 21 of the fan motor 2 extending out of the fan body 1. The blade base 3 is connected to the end of the rotating shaft 21 extending out of the fan body 1 by an interference fit, with a gap between the blade base 3 and the fan body 1. The first blade 4 and the second blade 5 are rotatably connected to the blade base 3. The relative states of the first blade 4 and the second blade 5 include: a stowed state, in which the first blade 4 and the second blade 5 are stacked, and a rotating state, in which the first blade 4 and the second blade 5 are centrally symmetrical about the rotating shaft 21.

[0264] The fan body 1 comprises a first housing 11 and a second housing 12. The first housing 11 defines a shaft hole 111. The fan motor 2 is mounted on the first housing 11, with the rotating shaft 21 of the fan motor 2 inserted into and extending through the shaft hole 111. The fan blade base 3 is mounted outside the first housing 11 and connected to the end of the rotating shaft 21 extending through the shaft hole 111.

[0265] The first housing 11 and the second housing 12 are connected by snap fastening. However, the connection method between the first housing 11 and the second housing 12 is not limited to this. Depending on the specific application scenario, in some embodiments, the first housing 11 and the second housing 12 can also be connected by (but not limited to): gluing, riveting, screw connection, or interference fit plug-in connection.

[0266] In some embodiments, the fan body 1 can also be molded into a complete shell through an integrated molding process.

[0267] The fan blade base 3 is configured in a runway shape. However, the overall structure of the fan blade base 3 is not limited thereto. Depending on the specific application scenario, in some embodiments, the fan blade base 3 can be configured in (but not limited to): circular, elliptical, heart-shaped, triangular, quadrilateral or other polygonal shapes.

[0268] The fan blade base 3 is provided with a first blade 4 and a second blade 5, a total of two blades. However, the number of blades on the fan blade base 3 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of blades on the fan blade base 3 can be (but not limited to): 3, 4, 5 or more.

[0269] In the above embodiment, the fan motor 2 is arranged in the fan body 1, and the blade base 3 connected to the fan blades is arranged outside the fan body 1. The blade base 3 is connected to the rotating shaft 21 of the fan motor 2 by an interference fit, which facilitates the disassembly and assembly of the fan blades. At the same time, the blade base 3 is connected to the first blade 4 and the second blade 5 by rotation, so that the first blade 4 and the second blade 5 can rotate around the connection position with the blade base 3. This structure enables the first blade 4 and the second blade 5 to be in a storage state when not in use. In the storage state, by stacking the first blade 4 and the second blade 5, the overall volume of the portable fan is reduced, making the portable fan more compact. When the fan motor 2 rotates, the first blade 4 and the second blade 5 are in a centrally symmetrical structure around the rotating shaft 21 under the action of inertia, so that the diameter of the first blade 4 and the second blade 5 in the rotation direction becomes larger, the coverage area of ​​the first blade 4 and the second blade 5 is larger, and the air outlet efficiency is improved. Due to the gap between the fan blade base 3 and the fan body 1, no physical friction occurs between the fan blade base 3 and the fan body 1, which improves the air outlet efficiency. The gap between the fan blade base 3 and the fan body 1 can serve as an air inlet channel for the first blade 4 and the second blade 5, thereby further improving the blowing efficiency of the portable fan.

[0270] Please refer to Figure 34, which is a schematic structural diagram of the fan blade base in the rotating state of this embodiment.

[0271] As shown in Figure 34, the fan blade base 3 includes: an assembly seat 31, a connecting sleeve 311 is provided on the assembly seat 31, and a connecting hole (not shown) is opened on the connecting sleeve 311. The connecting sleeve 311 is interference fit connected with the end of the rotating shaft 21 extending out of the fan body 1 through the connecting hole.

[0272] The assembly seat 31 is configured in a runway shape. However, the overall configuration of the assembly seat 31 is not limited thereto, and depending on the specific application scenario, in some embodiments, the assembly seat 31 can be configured in (but not limited to): circular, elliptical, heart-shaped, triangular, quadrilateral, or other polygonal shapes.

[0273] The end of the shaft 21 that connects to the connection hole is cylindrical. However, the shape of the end of the shaft 21 is not limited to this. Depending on the specific application scenario, in some embodiments, the shape of the end of the shaft 21 can be (but not limited to) an ellipse, a racetrack, a triangle, a quadrilateral, a pentagon, or other polygon. The shape of the connection hole can vary according to the shape of the shaft 21 and can be set to a shape corresponding to the shape of the shaft 21.

[0274] The provision of the connecting sleeve 311 extends the contact area between the connecting hole and the end of the rotating shaft 21 , thereby improving the stability of the connection between the assembly base and the rotating shaft 21 .

[0275] Please refer to Figure 35, which is a schematic diagram of the decomposed structure of the fan blade base in this embodiment.

[0276] As shown in Figure 35, the fan blade base 3 also includes: a first rotating shaft 312 and a second rotating shaft 313. The first rotating shaft 312 and the second rotating shaft 313 are both connected to the assembly seat 31, and the first rotating shaft 312 and the second rotating shaft 313 are respectively arranged on both sides of the connecting shaft sleeve 311. The tail 42 of the first blade 4 is provided with a first shaft ring 41, and the tail 52 of the second blade 5 is provided with a second shaft ring 51. The first shaft ring 41 is sleeved on the first rotating shaft 312, and the second shaft ring 51 is sleeved on the second rotating shaft 313.

[0277] The inner diameter of the first shaft ring 41 is larger than the outer diameter of the first shaft 312 , and the inner diameter of the second shaft ring 51 is also larger than the outer diameter of the second shaft 313 , so that the first blade 4 can rotate around the first shaft 312 and the second blade 5 can rotate around the second shaft 313 .

[0278] The first rotating shaft 312 and the second rotating shaft 313 are arranged on both sides of the connecting sleeve 311, which can distribute the center of gravity of the fan blade base 3 on the connecting sleeve 311, thereby making the rotation stability of the first blade 4 and the second blade 5 higher.

[0279] Please refer to FIG36 , which is a schematic structural diagram of the limiting plate of this embodiment.

[0280] As shown in Figure 36, the fan blade base 3 also includes: a limit plate 32, which is arranged between the assembly seat 31 and the fan body 1, and a plug hole 321 is opened on the limit plate 32. The end of the connecting sleeve 311 connected to the rotating shaft 21 is inserted into the plug hole 321. The limit plate 32 is detachably connected to the first rotating shaft 312 and the second rotating shaft 313.

[0281] The positioning plate 32 prevents the first and second blades 4 and 5 from falling off the first and second rotating shafts 312 and 313. Furthermore, the positioning plate 32 defines the positions of the first and second blades 4 and 5, preventing them from moving too widely, which could lead to jittering due to uneven position distribution during fan rotation. This ensures more stable fan rotation and improves airflow efficiency.

[0282] The limiting plate 32 is configured in a runway shape. However, the overall configuration of the limiting plate 32 is not limited thereto. Depending on the specific application scenario, in some embodiments, the limiting plate 32 can be configured in (but not limited to): a circle, an ellipse, a heart shape, a triangle, a quadrilateral, or other polygonal shapes.

[0283] In some embodiments, the limiting plate 32 can be replaced by a stop edge. Specifically, one end of the first rotating shaft 312 and the second rotating shaft 313 is laterally protruded to form a stop edge, and the diameter of the stop edge is larger than the inner diameter of the first shaft ring 41 and the second shaft ring 51.

[0284] A first plugging slot 322 and a second plugging slot 323 are provided on the side of the limiting plate 32 facing the assembly seat 31. The first plugging slot 322 and the second plugging slot 323 are respectively arranged on both sides of the plugging hole 321. The first rotating shaft 312 is inserted into the first plugging slot 322, and the second rotating shaft 313 is inserted into the second plugging slot 323. A first through hole 325 is provided in the first plugging slot 322, and a second through hole 326 is provided in the second plugging slot 323. A first threaded hole (not shown) corresponding to the first through hole 325 is provided on the first rotating shaft 312, and a second threaded hole (not shown) corresponding to the second through hole 326 is provided on the second rotating shaft 313. The first through hole 325 and the first threaded hole are connected by a first screw (not shown), and the second through hole 326 and the second threaded hole are connected by a second screw (not shown).

[0285] The provision of the first insertion slot 322 and the second insertion slot 323 facilitates alignment of the first rotating shaft 312 with the second rotating shaft 313 and the limiting plate 32 during assembly, making assembly of the fan base 3 more convenient. Simultaneously, the provision of the first insertion slot 322 and the second insertion slot 323 allows the first rotating shaft 312 and the second rotating shaft 313 to extend therein, rationally utilizing the spatial structure and making the structure of the fan base 3 more compact. The provision of the first insertion slot 322 and the second insertion slot 323 can also share the lateral external force exerted on the first rotating shaft 312 and the second rotating shaft 313, avoiding the problem of low lateral force strength caused by the first rotating shaft 312 and the second rotating shaft 313 being merely connected to the assembly base 31, thereby improving the physical strength of the first rotating shaft 312 and the second rotating shaft 313. When the fan motor 2 rotates at high speed, it can also withstand the large lateral centrifugal force generated by the first blade 4 and the second blade 5 during high-speed rotation.

[0286] The edge of the surface of the limiting plate 32 facing the fan body 1 is raised to form an anti-protrusion barrier 324, and there is a gap between the limiting plate 32 and the fan body 1. In order to prevent the connecting sleeve 311, the first screw or the second screw from protruding from the surface of the limiting plate, the side of the limiting plate 32 facing the fan body 1 extends toward the fan body 1 to form the anti-protrusion barrier 324. Since, when the portable fan is in operation, the fan blade base 3 needs to rotate at high speed with the fan motor 2, when foreign matter protrudes from the fan blade base 3, it will rub against the air during high-speed rotation and generate aerodynamic noise. The provision of the anti-protrusion barrier 324 can prevent the above-mentioned structure from protruding from the surface of the limiting plate. Therefore, the provision of the anti-protrusion barrier 324 can effectively reduce the fan noise of the portable fan. At the same time, there is a gap between the limiting plate 32 and the fan body 1, which can prevent friction between the fan body 1 and the limiting plate 32, thereby improving the rotation efficiency and air outlet efficiency of the portable fan. The gap between the fan body 1 and the limiting plate 32 can also serve as an air inlet channel for the first blade 4 and the second blade 5 at the blade tails 42 and 52, thereby improving the air intake efficiency of the portable fan.

[0287] The limit plate 32 is detachably connected to the first rotating shaft 312 and the second rotating shaft 313, so that the limit plate 32 can rotate synchronously with the assembly seat 31, thereby avoiding the limit plate 32 from being displaced along the extension direction of the rotating shaft 21 and contacting the fan body 1, thereby improving the overall rotation efficiency of the fan blade base 3.

[0288] In some embodiments, the detachable connection between the limiting plate 32 and the first rotating shaft 312 and the second rotating shaft 313 can be achieved by an interference fit between the first rotating shaft 312 and the first plug-in slot 322, and an interference fit between the second rotating shaft 313 and the second plug-in slot 323. However, the detachable connection between the limiting plate 32 and the first rotating shaft 312 and the second rotating shaft 313 is not limited to this. Depending on the specific application scenario, in some embodiments, a claw is provided on the first rotating shaft 312, and a buckle structure that cooperates with the claw is provided in the first plug-in slot 322. Similarly, a claw is also provided on the second rotating shaft 313, and a buckle structure that cooperates with the claw is also provided in the second plug-in slot 323, so that the first rotating shaft 312 is engaged with the first plug-in slot 322, and the second rotating shaft 313 is engaged with the second plug-in slot 323.

[0289] The first blade 4 and the second blade 5 both include a windward surface 44 , 54 and a leeward surface 45 , 55 , and the edge positions 58 where the windward surfaces 44 , 54 and the leeward surfaces 45 , 55 meet are both configured in an arc shape.

[0290] The sides of the first and second blades 4 and 5 that face the fan body 1 are called leeward surfaces 45 and 55, while the sides of the first and second blades 4 and 5 that face away from the fan body 1 are called windward surfaces 44 and 54. The intersection of windward surfaces 44 and 54 and leeward surfaces 45 and 55 forms the side edges of the first and second blades 4 and 5. The arc-shaped side edges of the first and second blades 4 and 5 reduce their cutting power, preventing them from scratching the human body when in contact with the rotating first and second blades 4 and 5, thereby improving the safety of the portable fan.

[0291] The windward surfaces 44 and 54 are concave to form an inner arc surface, and the leeward surfaces 45 and 55 are convex to form an outer arc surface. Since the first blade 4 and the second blade 5 need to push air when rotating, the concave windward surfaces 44 and 54 to form an inner arc surface can increase the contact area between the first blade 4 and the second blade 5 and the air, thereby improving the efficiency of pushing the air. At the same time, the inner arc surface has a concave binding force on the air, which can better drive the air to rotate, giving the contacted air a higher initial velocity, and further improving the air outlet efficiency of the first blade 4 and the second blade 5. The leeward surfaces 45 and 5 are convex to form an outer arc surface, which can reduce the resistance of the air to the first blade 4 and the second blade 5, and improve the rotation efficiency of the first blade 4 and the second blade 5. At the same time, the convex surface area of ​​the leeward surfaces 45 and 5 is increased. When the first blade 4 and the second blade 5 rotate, the air flow rate at the leeward surfaces 45 and 55 is high and the air pressure is low. A pressure difference is created at the position where the leeward surfaces 45, 55 rotate. This pressure difference causes the air behind the leeward surfaces 45, 55 to flow toward the leeward surfaces 45, 55 and the direction in which the leeward surfaces 45, 55 extend, thereby forming an air flow facing the direction directly opposite the first blade 4 and the second blade 5. Therefore, during the rotation of the first blade 4 and the second blade 5, in addition to the airflow being pushed by the windward surfaces 44, 54, the leeward surfaces 45, 55 also play a blowing role, thereby improving the air output efficiency of the first blade 4 and the second blade 5.

[0292] Both the first blade 4 and the second blade 5 include a first blade edge 46, 56 and a second blade edge 47, 57. The first blade edge 46, 56 and the second blade edge 47, 57 are tilted outwards away from the fan body 1, and the tilted height of the second blade edge 47, 57 is greater than the tilted height of the first blade edge 46, 56. During the rotation of the first blade 4 and the second blade 5, the first blade edge 46, 56 first cuts the air, and then the windward surface 44, 54 and the second blade edge 47, 57 push the air. Therefore, when the tilted height of the second blade edge 47, 57 is greater than the tilted height of the first blade edge 46, 56, the wind resistance experienced by the first blade edge 46, 56 is reduced, and the air-binding force of the second blade edge 47, 57 is increased. The height difference between the first blade edge 46, 56 and the second blade edge 47, 57 is more aerodynamically consistent, effectively improving the air output efficiency of the portable fan.

[0293] The curvature of the first blade edges 46, 56 is smaller than that of the second blade edges 47, 57. Along the extension direction of the first blade 4 and the second blade 5, the curvature of the first blade edges 46, 56 is smaller than that of the second blade edges 47, 57. As can be seen from the above description, during the rotation of the first blade 4 and the second blade 5, the first blade edges 46, 56 are used to cut the air, while the second blade edges 47, 57 are used to push the air. Designing the curvature of the first blade edges 46, 56 to be smaller can reduce the contact area between the first blade edges 46, 56 and the air, allowing the first blade edges 46, 56 to better cut the air. Designing the curvature of the second blade edges 47, 57 to be larger can increase the contact area between the second blade edges 47, 57 and the air, increase the air-binding force of the second blade edges 47, 57, and better push the air. The varying curvatures of the first blade edges 46, 56 and the second blade edges 47, 57 can further reduce the wind resistance of the first blade 4 and the second blade 5, improving the blowing efficiency of the first blade 4 and the second blade 5.

[0294] The first blade 4 and the second blade 5 both include a tail 42, 52 and a tip 43, 53. The thickness of the first blade 4 and the second blade 5 gradually decreases from the tail 42, 52 to the tip 43, 53. Since the first blade 4 and the second blade 5 are designed with a smaller tail 42, 52 area and a larger tip 43, 53 area, the change in thickness of the first blade 4 and the second blade 5 can make the overall mass distribution of the first blade 4 and the second blade 5 more uniform and better balanced. Furthermore, when the first blade 4 and the second blade 5 rotate, although the tail 42, 52 and the tip 43, 53 maintain the same angular velocity, the linear velocity of different parts of the first blade 4 and the second blade 5 gradually increases from the tail 42, 52 to the tip 43, 53. Therefore, the thickness gradually decreases from the blade tail 42, 52 to the blade tip 43, 53, gradually reducing the contact area between the blade edge and the air, thereby gradually reducing the wind resistance at different locations along the direction from the blade tail 42, 52 to the blade tip 43, 53. In conjunction with the changes in angular velocity at different locations during the rotation of the first blade 4 and the second blade 5, the edge thickness changes accordingly, balancing the wind resistance experienced by the edges of the first blade 4 and the second blade 5 from the blade tail 42, 52 to the blade tip 43, 53 during rotation, thereby preventing damage to the first blade 4 and the second blade 5 due to uneven wind resistance during rotation.

Claims

1. A portable fan, wherein: include: A first housing, wherein a fan assembly is disposed on the first housing; a second shell, the second shell being buckled onto the first shell; The edge of the first shell protrudes in the direction of the second shell to form a connector, and the connector is provided with a plurality of first engaging parts. A engaging part is provided in the second shell, and a first plug-in slot is formed between the engaging part and the inner surface of the second shell. The engaging part is provided with a plurality of second engaging parts that cooperate with the plurality of first engaging parts, and the connector is plugged into the first plug-in slot, and the plurality of first engaging parts cooperate and engage with the plurality of second engaging parts.

2. The portable fan according to claim 1, wherein: The connector comprises a first plug-in board, the first plug-in board is arranged along the length direction of the first shell, and the plurality of first engaging members are arranged on the first plug-in board.

3. The portable fan according to claim 2, wherein: The plug connector includes: a plurality of plug connectors, and the plurality of plug connectors are arranged on the first plug board at intervals.

4. The portable fan according to claim 3, wherein: Each two first engaging members in the plurality of first engaging members form a group and are arranged in pairs below each plug connector in the plurality of plug connectors; or, The connector is also provided with a guide piece, which is arranged on the side of the first plug board facing away from the connector, and extends from the edge of the first shell to the side of the first plug board facing the second shell, and gradually becomes smaller along the extension direction.

5. The portable fan according to claim 1, wherein: The clamping member includes: a plurality of first clamping plates, and the plurality of clamping plates are arranged at intervals along the length direction of the second shell.

6. The portable fan according to claim 5, wherein: Every two second engaging members in the plurality of second engaging members form a group, and are arranged in pairs on each first engaging plate in the plurality of first engaging plates; or, Each of the multiple first clip-on plates is provided with connecting plates on both sides, one end of the connecting plate is connected to the first clip-on plate, the other end of the connecting plate is connected to the inner surface of the second shell, and the height of the connecting plate is lower than the height of the first clip-on plate.

7. The portable fan according to claim 1, wherein: The first shell is provided with second plug-in slots on both sides of the fan assembly, and the edge protrusions of the second shell at the corresponding positions of the second plug-in slots form second plug-in plates that cooperate with the second plug-in slots, and the second plug-in slots and the second plug-in plates are both curved along the circumferential arc of the fan assembly.

8. The portable fan according to claim 1, wherein: The first shell is provided with a second clip plate at the end edge of one end of the fan assembly, which is protruded toward the second shell. A third clip is provided on the second clip plate. A fourth clip that cooperates with the third clip is formed at a position corresponding to the third clip on the inner surface of the second shell. The second clip plate is bent in a circumferential arc shape along the fan assembly.

9. The portable fan according to claim 8, wherein: The second shell is provided with a first limiting plate and a second limiting plate on both sides of the fourth engaging member, respectively, and the second clamping plate is disposed between the first limiting plate and the second limiting plate.

10. The portable fan according to claim 9, wherein: The second clamping plate is protruded on the side facing the first housing to form two guide tongues, and a gap is left between the two guide tongues; or, A cut surface is formed on one side of the first limit plate and the second limit plate facing the fan assembly, so that the first limit plate and the second limit plate and the surface of the fan assembly are fitted to each other.

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