Hanging waist fan

Abstract

Hanging waist fan, comprising the following: a housing (1a) comprising a receiving cavity (1b), an air inlet (11) and an air outlet (12), wherein the air outlet (12) and at least a part of the receiving cavity (1b) are connected to the air inlet (11) one after the other along a first predetermined direction (XX); a fan assembly (2) located in the receiving cavity (1b) and between the air inlet (11) and the air outlet (12) for driving the air flow to flow from the air inlet (11) to the air outlet (12); a power supply assembly (3) located in the receiving cavity (1b), wherein the power supply assembly (3) is arranged offset along the first predetermined direction (XX) from the projection of the fan assembly (2), and wherein the power supply assembly (3) is electrically connected to the fan assembly (2) to supply the fan assembly (2) with power; and and a first clamping device (7) connected to one side of the housing (1a) and used to form with the housing (1a) a clamping space for clamping an external object to fix the hanging waist fan to the external object.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the field of fans, in particular a hanging waist fan. STATE OF THE ART

[0002] A fan is a household appliance that uses an electric motor to rotate fan blades to accelerate airflow. It is mainly used for cooling and air circulation in homes, classrooms, offices, shops, hospitals, and hotels. Traditional fans are large and not easy to carry. With the advancement of science, fans are becoming smaller and smaller. However, the hanging waist fans available on the market still have shortcomings. For example, people who work outdoors cannot always hold the fan in their hands, which means they cannot use the fan for cooling at the same time. Therefore, there is an urgent need for a hanging waist fan that leaves the hands free while blowing wind for cooling, providing the user with a more convenient and comfortable experience.In addition, improving the wind efficiency of the fan and improving portability are also important issues in the fan field. CONTENT OF THE PRESENT UTILITY MODEL

[0003] To overcome the deficiencies of the prior art, the present utility model provides a hanging waist fan that allows hands-free operation while blowing cooling wind and is easy to carry. The present utility model further provides a fan assembly with higher wind efficiency to increase the wind efficiency of the hanging waist fan using the fan assembly.

[0004] In a first aspect, an embodiment of the present invention provides a hanging waist fan comprising: a housing including a receiving cavity, an air inlet, and an air outlet, wherein the air outlet and at least a portion of the receiving cavity are sequentially connected to the air inlet along a first predetermined direction; a fan assembly located in the receiving cavity and between the air inlet and the air outlet for driving the airflow to flow from the air inlet to the air outlet; a power supply assembly located in the receiving cavity, wherein the power supply assembly is arranged offset from the projection of the fan assembly along the first predetermined direction, and wherein the power supply assembly is electrically connected to the fan assembly for supplying power to the fan assembly;and a first clamping device connected to one side of the housing and used to form a clamping space with the housing for clamping an external object to fix the hanging waist fan to the external object;

[0005] Furthermore, the housing has a first side, a second side and a third side, wherein the first side and the second side are arranged opposite each other, and wherein the air outlet is provided on the first side and the air inlet is provided on the second side, and wherein the third side is located between the first side and the second side and is adjacent to both the first side and the second side, and wherein the first clamping device extends along the first predetermined direction and is connected to the third side of the housing.

[0006] Furthermore, the housing further comprises a fourth side, a fifth side and a sixth side, wherein the fourth side and the third side are arranged opposite to each other, and wherein the fifth side and the sixth side are arranged opposite to each other, and wherein the direction from the fifth side to the sixth side is a second predetermined direction, and wherein the fan assembly and the power supply assembly are arranged sequentially along the second predetermined direction.

[0007] Furthermore, the hanging waist fan further comprises a second clamping device connected to the fourth side of the housing, wherein the second clamping device is also used to form a clamping space with the housing for clamping an external object to attach the hanging waist fan to the external object; and wherein the first clamping device is connected to an end of the third side of the housing facing the air outlet, and wherein the second clamping device is connected to an end of the fourth side of the housing facing the air inlet, and wherein the second clamping device extends in a direction opposite to that of the first clamping device.

[0008] Furthermore, the direction from the third side to the fourth side is a third predetermined direction, wherein the maximum diameter of the housing along the second predetermined direction is greater than the maximum diameter of the housing along the third predetermined direction; and wherein a first hook is further arranged on an end of the fifth side of the housing facing the air outlet, and wherein two ends of the first hook are each connected to the fifth side of the housing and form a first hook hole with the housing; and wherein a second hook is further arranged on an end of the sixth side of the housing facing the air outlet, and wherein two ends of the second hook are each connected to the sixth side of the housing and form a second hook hole with the housing.

[0009] Furthermore, the fan assembly is provided with at least one first locking member, wherein the inside of the housing is provided with at least one second locking member, and wherein the at least one first locking member and the at least one second locking member cooperate with each other so that the fan assembly is fastened in the receiving cavity of the housing; and wherein the at least one first locking member is provided in a number greater than 1 and the at least one second locking member is provided in a number greater than 1, and wherein the plurality of first locking members is each arranged on two sides of the fan assembly; and wherein the first locking member is one of a projection and a groove and the second locking member is the other of a projection and a groove; and wherein the projection comprises a locking part.

[0010] Further, the fan assembly comprises a motor, a fan blade, and an output shaft, wherein the fan blade is installed on the output shaft, and wherein the fan assembly is an axial flow fan assembly, and wherein the output shaft is arranged along the first predetermined direction.

[0011] Furthermore, the fan assembly further comprises a fan housing comprising a housing body, an air outlet hood, and a spacer net, wherein the motor and the fan blade are both arranged in the housing body, and wherein the air outlet hood is arranged on one side of the housing body and has a plurality of air outlet holes, and wherein the air outlet hood is also located at the air outlet, and wherein the spacer net is arranged on the other side of the housing body, and wherein the air outlet hood comprises a plurality of air guide rings and an annular wall structure connected to the periphery of the plurality of air guide rings, and wherein the spacer net comprises a plurality of air inlet holes, and wherein a plurality of air outlet holes are defined between the plurality of air guide rings, and wherein the plurality of air guide rings are used toin cooperation with the inner side surface of the annular wall structure to compress the air flow coming from the housing body and then blow it out.

[0012] Furthermore, the inner side surface of the annular wall structure is an inclined or curved surface such that the inner diameter of the annular wall structure gradually decreases along the first predetermined direction; and wherein the spacer net is a metal mesh net provided with a plurality of air inlet holes, and wherein each of the air inlet holes has an inner diameter in the range of 0.5 mm to 4 mm.

[0013] Furthermore, the air inlet holes are regular hexagons, with two adjacent air inlets sharing the same peripheral wall, and the width of the peripheral wall being in the range of 0.05 mm to 2 mm.

[0014] Furthermore, the air outlet hood further comprises an installation structure connecting the plurality of air guide rings, wherein the installation structure comprises an annular installation wall, a cover plate connecting the installation wall, and a first installation column connected to the inside of the cover plate, and wherein the installation column is installed to correspond to the installation hole of the housing body; and wherein the cover plate is located in the center of the plurality of air outlet holes, and wherein the outer surface of the cover plate has a groove, and wherein a first alignment structure is further arranged on the installation structure, and wherein the housing body has a second alignment structure, and wherein the first alignment structure and the second alignment structure cooperate to realize the alignment and assembly of the housing body and the air outlet hood.

[0015] Further, the housing body includes a side wall structure arranged in a ring shape, an installation portion located at one end in the side wall structure, and an air guide portion connected between the installation portion and the side wall structure, wherein the air guide portion includes a plurality of air guide blades arranged at intervals to direct the air coming from the fan blade in a predetermined direction, and wherein the fan blade and the motor are arranged in the side wall structure and are located on one side of the installation portion, and wherein the motor is installed on the installation portion; and wherein the installation portion has a hole, and wherein a wire connecting the motor protrudes through the hole, then protrudes from the gap between the housing body and the air outlet hood, and connects the control assembly.

[0016] Furthermore, the installation section further includes a blind hole arranged towards the motor, the opening of the blind hole facing a side on which the motor is located, and the blind hole is used to store the oil required for the rotation of the output shaft; the installation section includes an installation plate and a second installation column connecting the installation plate and extending towards the spacer net, the blind hole being provided on the second installation column; the motor includes a motor installation hole attached to the second installation column so that the motor is installed on the second installation column, and a fixing column and a restricting ring having through holes are further arranged in the blind hole, and the output shaft includes a main body connecting the fan blade.and a restricting portion connecting the main body, and wherein the output shaft passes through the mounting post and the restricting ring, causing the restricting portion to be located at an end of the restricting ring remote from the mounting post, and wherein the restricting portion comprises a rod portion and a restricting end connecting an end of the rod portion remote from the fan blade, and wherein the diameter of the restricting end gradually decreases in a direction away from the blade, and wherein the outer surface of the rod portion includes a restricting groove with the restricting end and the main body, and wherein the restricting ring has a restricting hole, and wherein the diameter of the restricting hole is larger than that of the rod portion and smaller than that of the main body and smaller than that of the restricting end, so that the restricting ring is restricted in the restricting groove.

[0017] Furthermore, the first fan housing further comprises an air inlet cover, wherein the spacer net is installed on the inside of the air inlet cover, and wherein the air inlet cover is arranged at an end of the housing body facing away from the air outlet hood, and wherein the air inlet cover is annular, and wherein the air inlet cover is attached to one end of the housing body; and wherein the outer side surface of one end of the housing body may have a stepped groove, and wherein the air inlet cover is attached and installed to the stepped groove, and wherein the outer side surface of the air inlet cover is flush with the outer side surface of the housing body.

[0018] Furthermore, the housing comprises a first section and a second section, wherein the first section and the second section are arranged one after the other along the second predetermined direction, wherein a plurality of first locking elements are arranged on the edge of the first section, and wherein a plurality of second locking elements are arranged on the edge of the second section, and wherein the plurality of first locking elements and the plurality of second locking elements cooperate to integrally connect the first section and the second section to one another.

[0019] Furthermore, the housing comprises a first section, a second section and an installation housing, wherein the first section, the installation housing and the second section are arranged one after the other along the second predetermined direction, wherein a plurality of first locking elements are arranged on the edge of the first section, and wherein a plurality of second locking elements are arranged on the edge of the second section, and wherein a plurality of third locking elements, which interact in a locking manner with the plurality of first locking elements, and a plurality of fourth locking elements, which interact in a locking manner with the plurality of second locking elements, are arranged on the installation housing, so that the installation housing, the first section and the second section are connected to one another in one piece.

[0020] Furthermore, the inside of the housing further comprises a plurality of air guide plates arranged corresponding to the air inlet, wherein the plurality of air guide plates are located between the air inlet and the fan assembly, and wherein each air guide plate extends along the first predetermined direction, and wherein the plurality of air guide plates are arranged sequentially along the direction from the third side to the fourth side.

[0021] The housing further comprises a shell and an installation housing located in the shell, wherein the installation housing comprises a partition plate, and wherein the fan assembly and the power supply assembly are each located on two sides of the partition plate; and wherein the first clamping device is connected to the installation housing and formed integrally with the installation housing, and wherein the shell has a slot, and wherein a portion of the first clamping device connected to the installation housing is fastened in the slot.

[0022] Furthermore, the power supply assembly comprises a battery, wherein the installation housing further comprises at least one limiting and fixing member connecting the partition plate and extending toward the battery, wherein the at least one limiting and fixing member is arranged around the periphery of the battery and fixes the battery; and wherein the hanging waist fan further comprises a control assembly, and wherein the control assembly is located in the receiving cavity and comprises a control button and a circuit board electrically connecting the control button and the battery, and wherein the third side of the housing has a buttonhole, wherein the control button is arranged corresponding to the buttonhole.

[0023] In a second aspect, another embodiment of the present invention further provides a fan assembly comprising a fan housing, a motor, and a fan blade connected to the motor, wherein the fan blade is arranged in the first fan housing, and wherein the fan housing comprises a housing body, an air outlet hood, and a spacer net, and wherein the air outlet hood is arranged on one side of the housing body and has an air outlet hole, and wherein the spacer net is arranged on the other side of the housing body, and wherein the spacer net comprises a plurality of air inlet holes for reducing air resistance and increasing the air inlet volume, and wherein the air outlet hood comprises a plurality of air guide rings and an annular wall structure connected to the periphery of the plurality of air guide rings,and wherein a plurality of air outlet holes are defined between the plurality of air guide rings, and wherein the plurality of air guide rings are used, in cooperation with the inner side surface of the annular wall structure, to compress and subsequently blow out the air flow coming from the housing body.,

[0024] The present utility model has the following advantages: in the hanging waist fan provided by the present utility model, the power supply assembly is arranged along the first predetermined direction offset from the projection of the fan assembly, so that the fan assembly and the power supply assembly are arranged side by side in the receiving cavity of the housing, so as to make the positional arrangement of the fan assembly and the power supply assembly in the housing more reasonable and compact, which is conducive to the miniaturization of the hanging waist fan, and to improve the portability of the hanging waist fan.In addition, the air path formed by the fan assembly can also be offset from the power supply assembly, thereby avoiding a situation where the power supply assembly affects the wind efficiency of the fan assembly, so that the hanging waist fan has higher wind efficiency, higher wind force and better cooling effect. SHORT DESCRIPTION OF THE DRAWING Fig. 1 shows a three-dimensional view of a hanging waist fan in a first embodiment of the present utility model. Fig. 2 shows an exploded view of a hanging waist fan according to Fig. 1. Fig. 3 shows a sectional view of a hanging waist fan according to Fig. 1. Fig. 4 shows a schematic diagram of an installation case of the hanging waist fan according to Fig. 1. Fig. 5 shows a three-dimensional view of the hanging waist fan according to Fig. 1 from a different perspective. Fig. 6 shows a three-dimensional view of a hanging waist fan in a second embodiment of the present utility model. Fig. Figure 7 shows a three-dimensional view of the hanging waist fan according to Fig. 6 from a different perspective. Fig. Figure 8 shows an exploded view of a hanging waist fan according to Fig. 6. Fig. 9 shows an exploded view of the hanging waist fan according to Fig. 6 from a different perspective. Fig. 10 shows a sectional view of a hanging waist fan according to Fig. 6. Fig. 11 shows an exploded view of a fan assembly of the hanging waist fan according to Fig. 6. Fig. 12 shows an exploded view of the fan assembly according to Fig. 11 from a different perspective. Fig. 13 shows a three-dimensional view of a spacer net of the fan assembly of the hanging waist fan in a third embodiment of the present utility model. Fig. 14 shows an exploded view of a hanging waist fan in a fourth embodiment of the present utility model. Fig. 15 shows an exploded view of a hanging waist fan in a fifth embodiment of the present utility model. Fig. 16 shows an exploded view of a hanging waist fan in a sixth embodiment of the present utility model. Fig. 17 shows an exploded view of a fan assembly of the hanging waist fan according to Fig. 16. Fig. 18 shows an exploded view of the fan assembly according to Fig. 17 from a different perspective. Fig. 19 shows a sectional view of the hanging waist fan according to Fig. 16, wherein the output shaft and the fan blade are at a first limiting position. Fig. 20 shows a sectional view of the hanging waist fan according to Fig. 16, wherein the output shaft and the fan blade are at a second limiting position. Fig. 21 shows an enlarged view of point A according to Fig. 19. DETAILED DESCRIPTION

[0025] With reference to Fig. 1 to 5, a first embodiment of the present utility model provides a hanging waist fan comprising a shell 1, a fan assembly 2, a power supply assembly 3, and an installation case 4.

[0026] The shell 1 is provided with a first air inlet 11, an air outlet 12 and a first air guide channel 13, wherein the first air inlet 11, the first air guide channel 13 and the air outlet 12 are connected one after the other.

[0027] The fan assembly 2 is used to drive the air flow from the first air inlet 1 to the air outlet 12.

[0028] The power supply assembly 2 is electrically connected to the fan assembly 2 to supply power to the fan assembly 2.

[0029] The installation housing 4 is connected to the shell 1, wherein the installation housing 4 comprises a first installation section 41 and a second installation section 42, and wherein the first installation section 41 and the second installation section 42 are formed integrally with each other, and wherein the first installation section 41 is used for installing the fan assembly 2 and the second installation section 42 is used for installing the power supply assembly 3.

[0030] Through the above structure, when the user starts the fan, the fan assembly 2, under the energy assistance of the power supply assembly 3, sucks air from the first air inlet 11 and blows air to the human body through the first air guide duct 13 and the air outlet 12, which is a simple and efficient design that improves the efficiency of air blowing, and the installation casing 4 in which the power supply assembly 3 and the fan assembly 2 are installed is formed as an integral part, so the internal structure of the fan is more stable and the production cost is greatly reduced, which can realize the mass production of the hanging waist fan and greatly improve the production efficiency.

[0031] In the present embodiment, a lighting device 5 is also included, and the power supply assembly 3 is electrically connected to the lighting device 5 to supply power to the lighting device 5. Specifically, the lighting device 5 includes an LED lamp 51, and the installation case 4 is provided with an installation groove 52 at the top, and the LED lamp 51 is arranged in the installation groove 52. With the above structure, the hanging waist fan is equipped with a lighting function, so that the user can not only enjoy the blowing function of the fan, but also perform lighting when going to work on a hot summer night, and use the LED lamp for lighting when searching for an object or in an emergency situation, which enhances the multifunctionality of the hanging waist fan and improves the user experience.

[0032] In the present embodiment, the first installation portion 41 is provided with an air outlet hood 411 at the upper end, the air outlet hood 411 being connected to the upper end of the shell 1, and the air outlet hood 411 being provided with a plurality of air outlet holes 412 communicating with the air outlet 12. Further, the first installation portion 41 is provided with a second air guide duct 413 and a second air inlet 414, the second air inlet 414, the second air guide duct 413, and the air outlet holes 412 communicating sequentially. In particular, the fan assembly 2 is arranged in the second air duct 413, the fan assembly 2 being used to drive the air to flow sequentially through the first air inlet 11, the first air duct 13, the second air inlet 414, the second air duct 413 and the air outlet holes 412 to form a blown air flow.With the above structure, it is effectively realized that the fan assembly 2 drives the air from the first air inlet 11 of the shell 1 through the first air guide duct 13 of the shell 1, then enters the second air inlet 414 of the first installation section 41, passes through the second air guide duct 413, and finally blows out to the outside of the shell 1 through the air outlet holes 412 and the air outlet 12. This design allows the air inlet and the air outlet to be in the same direction, which greatly increases the blowing efficiency of the fan and improves the performance of the hanging waist fan.

[0033] In the present embodiment, the fan assembly 2 includes a motor 21, a fan blade 22, and an output shaft 23, and the fan blade 22 is connected to the output shaft 23. With the above structure, the motor 21 drives the fan blade 22 to rotate, and the output shaft 23 drives the fan blade 22 to suck in air and blow it toward the human body, thereby effectively realizing the air blowing function of the fan and improving the air blowing efficiency.

[0034] In the present embodiment, an air inlet hood 6 is further included, which is connected to the lower end of the shell 1, and the air inlet hood 6 is provided with a plurality of air inlet holes 61 that communicate with the first air inlet 11. With the above structure, the design of the air inlet hood 6 is conducive to preventing other contaminants such as hair, paper clippings, etc. from being sucked into the fan, which is conducive to maintaining the safety of the fan.

[0035] In the present embodiment, a spacer 43 is disposed between the first installation portion 41 and the second installation portion 42, and the spacer 43 is composed of a plurality of evenly spaced partition plates 431. With the above structure, since a plurality of evenly spaced partition plates 431 are provided, and the first installation portion 41 is equipped with a fan assembly 2 and the second installation portion 42 is equipped with a power supply assembly 3, there is a certain distance between the fan assembly 2 and the power supply assembly 3, which prevents the heat dissipated by the battery in the power supply assembly 3 from affecting the fan assembly 2 and is conducive to extending the service life of the fan.

[0036] In the present embodiment, the second installation portion 42 is provided with an installation cavity 421, the power supply assembly 3 includes a battery 32, and the hanging waist fan further includes a circuit board 31 electrically connected to the battery 32, and the circuit board 31 and the battery 32 are both arranged in the installation cavity 421. Since the circuit board 31 and the battery 32 are both arranged in the installation cavity 421, the above structure results in a compact structure, reduces the installation space, reduces production costs, and facilitates carrying for the user.The second installation section 42 comprises a curved partition plate 441 and a connecting plate 442 connected to both sides of the partition plate 441, wherein the partition plate 441 and the two connecting plates 442 enclose the installation cavity 421, and wherein the spacer device 43 is arranged on a side of the partition plate 441 facing the installation cavity 421.

[0037] In the present embodiment, the top of the shell 1 is provided with a slit 14, and the first installation portion 41 is provided with a restricting protrusion 415 that fits tightly against the slit, so that the installation casing 4 is partially located within the first air duct 13. With the above structure, the first installation portion 41 can be clamped in the shell 1, and the air outlet hood 411 can expose the air outlet 12, which contributes to the fan blowing out the air and improves the user experience.

[0038] In the present embodiment, the shell 1 comprises a front cover plate 101, a rear cover plate 102 located opposite the front cover plate 101, and a left cover plate 103 and a right cover plate 104 which connect the front cover plate 101 and the rear cover plate 102, wherein the front cover plate 101, the rear cover plate 102, the left cover plate 103 and the right cover plate 104 enclose the first air guide channel 13.

[0039] In the present embodiment, the first installation portion 41 is connected to a first clamping device 7 used to fix the hanging waist fan to the user's clothing. Specifically, the first clamping device 7 is a first elastic piece 71 tightly pressed against the front cover plate 101, so that the first elastic piece 71 and the front cover plate 101 form a first clamping space 711. Here, the first elastic piece 71 may be a metal elastic piece or a plastic elastic piece. With the above structure, the user can clamp the fan to the waistband or pocket of the pants during use by means of the first elastic piece 71, thereby making the fan blow air into the human body.Compared with the traditional small fan that needs to be held in the hand, this fan with elastic piece can free the hands, and the user does not need to hold the fan when working and can feel the wind from the fan to be cooled down, which greatly improves the portability and practicality of the product.

[0040] In the present embodiment, the air intake hood 6 is connected to a second tensioning device 8, which is used to attach the hanging waist fan to the user's clothing. Specifically, the second tensioning device 8 is a first elastic piece 81 tightly pressed against the rear cover plate 102, so that the second elastic piece 81 and the rear cover plate 102 form a second tensioning space 811. The second elastic piece 81 can be a metal elastic piece or a plastic elastic piece.With the above structure, when using, the user can clamp the second elastic piece 81 to the hem of the garment after clamping the waistband by the first elastic piece 71, so as to achieve the function of stabilizing the fan, and when the user needs to show a large physical movement due to work, the fan can still be stably attached to the waistband, which greatly ensures the stability of the fan.

[0041] In the present embodiment, the surface of the shell 1 is further provided with a first hook 105 and a second hook 106, a first hook hole 1051 is formed between the first hook 105 and the left cover plate 103, and a second hook hole 1061 is formed between the second hook 106 and the right cover plate 104. With the above structure, when it is not convenient for the user to clip the fan to the clothes, the user can pass a rope through the first hook hole 1051 and the second hook hole 1061, and then hang the rope around the neck, thereby realizing the carrying of the fan without using both hands to improve the portability of the fan.

[0042] In the present embodiment, the shell 1 is further provided with a control knob 9 electrically connected to the fan assembly 2 and the power supply assembly 3; the air inlet hood 6 is connected to a knob installation portion 62 provided with a knob installation hole 621, and the control knob 9 is located at the knob installation hole 621; the lower end of the shell 1 is provided with a first installation opening 15, an inwardly projecting knob installation slot 16, and a second installation opening 17, and the knob installation portion 62 can be snapped into the knob installation slot 16, and the first installation opening 15, the knob installation hole 621, the knob installation slot 16, and the second installation opening 17 communicate sequentially;and wherein the control knob 9 is further provided with a fan speed indicator 91 and a charging indicator 92. With the above structure, the user can press the control knob 9 to activate the operation of the fan, and the control knob is further provided with a fan speed indicator 91 and a charging indicator 92. The design is simple and ingenious, making it easy for the user to operate.

[0043] In the present embodiment, the air intake hood 6 is provided with a charging interface 63 for charging the battery 32. The charging interface 63 includes a DC charging interface or a Type-C charging interface. With the above structure, the DC charging interface or the Type-C charging interface can be adapted to the charging interface needs of different users, which is convenient for users to perform timely charging.

[0044] In the present embodiment, the installation casing 4 is snap-fitted to the shell 1, and the air intake hood 6 is snap-fitted to the shell 1. The outer wall of the shell 1 is provided with a plurality of anti-slip convex strips 107. With the above structure, the snap-fitted connection makes the structural installation of the fan more stable and solid, and improves the quality and safety of the product; and the outer wall of the shell 1 of the fan is provided with a plurality of anti-slip convex strips 107, so that the fan can increase friction when clamped to the waistband, thereby preventing the fan from easily falling off.

[0045] It is understood that, as in Fig. 1 to 5, the shell 1 and the installation case 4 together constitute the housing 1a of the hanging waist fan, the housing 1a having a receiving cavity 1b for receiving the power supply assembly 3, the fan assembly 2, etc., a first air inlet 11 and an air outlet 12.

[0046] The receiving cavity 1b comprises a first air guide channel 13, wherein the air outlet 12, at least a part of the receiving cavity (namely the first air guide channel 13) and the first air inlet 11 are successively connected along the first predetermined direction XX.

[0047] The fan assembly 2 is located above the first air duct 13 in the receiving cavity 1b and between the first air inlet 11 and the air outlet 12 to drive the air flow from the first air inlet 11 to the air outlet 12.

[0048] The power supply assembly 3 is located in the receiving cavity, wherein the power supply assembly 3 comprises a battery 32, and wherein the battery 32 is arranged offset from the projection of the fan assembly 2 along the first predetermined direction XX, and wherein the power supply assembly 3 is electrically connected to the fan assembly in order to supply the fan assembly 2 with power.

[0049] The first clamping device 7 is connected to one side of the casing (such as the installation casing 4) and is used to form a clamping space with the casing 1a for clamping an external object (e.g., an object with a sheet or plate structure such as a belt, a bag, a backpack, a flat plate, etc.) to fix the hanging waist fan to the external object.

[0050] It is understood that by disposing the power supply assembly 3 offset from the projection of the fan assembly 2 along the first predetermined direction XX, the fan assembly and the power supply assembly can be arranged side by side in the receiving cavity of the housing, thus making the positional arrangement of the fan assembly and the power supply assembly in the housing more reasonable and compact, which is conducive to the miniaturization of the hanging waist fan, and improving the portability of the hanging waist fan. In addition, the air path formed by the fan assembly can also be offset from the power supply assembly, thereby avoiding a situation where the power supply assembly affects the wind efficiency of the fan assembly, so that the hanging waist fan has higher wind efficiency, higher wind force, and better cooling effect.

[0051] In particular, the housing 1a has a first side 111, a second side 112, a third side 114, a fourth side 114, a fifth side 115 and a sixth side 116.

[0052] The first side 111 is arranged opposite the second side 112, the air outlet 12 is provided on the first side 111, and the first air inlet 11 is provided on the second side 112, and the third side 113 is located between the first side 111 and the second side 112 and adjacent to the first side 111 and the second side 112, respectively. In the present embodiment, the first clamping device 7 extends along the first predetermined direction XX and is connected to the third side 113 of the housing 1a. It is understood that the arrangement of the first clamping device 7 on the third side 113 can avoid the problem of interference with the inlet and outlet of the air when provided on the first side or the second side, and can effectively ensure wind efficiency.

[0053] The fourth side 114 and the third side 113 are arranged opposite each other, the fifth side 115 and the sixth side 116 are arranged opposite each other, and the direction from the fifth side 115 to the sixth side 116 is a second predetermined direction Y-Y, and the fan assembly 2 and the power supply assembly 3 are arranged sequentially along the second predetermined direction YY. It is understood that by arranging the fan assembly 2 and the power supply assembly 3 sequentially along the second predetermined direction YY and, at the same time, disposing a first tensioning device 7 on the third side 113, the overall arrangement of the hanging waist fan is made reasonable, and the problem that the first tensioning device 7 increases the length of the hanging waist fan in the second predetermined direction YY does not occur.

[0054] The second clamping device 8 is connected to the fourth side 114 of the housing 1a, wherein the second clamping device 8 is also used to form a clamping space with the housing 1a for clamping an external object in order to attach the hanging waist fan to the external object; and wherein the first clamping device 7 is connected to an end of the third side 113 of the housing 1a facing the air outlet 12, and wherein the second clamping device 8 is connected to an end of the fourth side 114 of the housing 1a facing the first air inlet 11, and wherein the second clamping device 8 extends in a direction opposite to that of the first clamping device 7. It is understood that the first clamping device 7 and the second clamping device 8 are provided on the third side 113 and the third side 113, respectively.the fourth side 114 so that the user can use either of the clamping devices as needed, and furthermore, the extension of the first clamping device 7 and the second clamping device 8 in the opposite direction also makes it easier for the user to clamp the hanging waist fan upwards or downwards to various external objects.

[0055] Furthermore, the direction from the third side 113 to the fourth side 114 is a third predetermined direction ZZ, wherein the maximum diameter of the housing 1a along the second predetermined direction Y - Y is greater than the maximum diameter of the housing 1a along the third predetermined direction ZZ; and wherein a first hook 105 is arranged on an end of the fifth side 115 of the housing 1a facing the air outlet 12, and wherein two ends of the first hook 105 are each connected to the fifth side 115 of the housing 1a and form a first hook hole 1051 with the housing 1a; and wherein a second hook 106 is arranged on an end of the sixth side 116 of the housing 1a facing the air outlet 12, and wherein two ends of the second hook 106 are each connected to the sixth side 116 of the housing 1a and form a second hook hole 1061 with the housing 1a.

[0056] Furthermore, in the present embodiment, the height of the first installation portion 41 along the first predetermined direction XX is lower than the height of the partition plate 441 along the first predetermined direction XX, so that the partition plate 441 can prevent the wind from the first air inlet 11 from entering the side where the power supply assembly 3 is located, thereby increasing the wind efficiency of the hanging waist fan, and the overall weight of the hanging waist fan can be reduced. However, it can be considered that in the variant embodiment, the height of the first installation portion 41 along the first predetermined direction XX may also be substantially equal to the height of the partition plate 441 along the first predetermined direction XX.

[0057] As in Fig. 2 and Fig. 3, the fan assembly 2 is an axial flow fan assembly, wherein the output shaft 23 is provided along the first predetermined direction XX, which, together with the first air inlet 11 and the air outlet 12, which are also arranged in the first predetermined direction XX, can result in the hanging waist fan being a direct-blowing hanging waist fan, whereby the effect of higher wind efficiency and higher wind power can be achieved.

[0058] With reference to Fig. 6 to 12, a second embodiment of the present utility model provides a hanging waist fan comprising a housing 1a, a fan assembly 2, a power supply assembly 3, a control assembly 3a, a first tensioning device 7, and a second tensioning device 8.

[0059] The housing 1a comprises a shell 1 and an installation housing 4 located in the shell 1, wherein the installation housing comprises a partition plate 441, and wherein the fan assembly 2 and the power supply assembly 3 are each located on two sides of the partition plate 441. In the present embodiment, the first clamping device 7 is connected to the installation housing 4 and formed integrally with the installation housing 4, wherein the shell 1 has a slot 14, and wherein a portion of the first clamping device 7 connected to the installation housing 4 is fastened in the slot 14.

[0060] Furthermore, the shell 1 comprises a first section 1c and a second section 1d, wherein the first section 1c, the installation housing 4 and the second section 1d are arranged one after the other along the second predetermined direction YY, wherein a plurality of first locking elements 118 are arranged on the edge of the first section 1c, and wherein a plurality of second locking elements 119 are arranged on the edge of the second section 1d, and wherein a plurality of third locking elements 401, which interact in a locking manner with the plurality of first locking elements 118, and a plurality of fourth locking elements 402, which interact in a locking manner with the plurality of second locking elements 119, are arranged on the installation housing 4, so that the installation housing 4, the first section 1c and the second section 1d are connected to one another in one piece.

[0061] The inside of the casing 1a (such as a side of the partition plate facing the fan assembly 2) further includes a plurality of air guide plates 117 arranged corresponding to the air inlet 11. The plurality of air guide plates 117 are located between the air inlet 11 and the fan assembly 2. Each air guide plate 117 can extend along the first predetermined direction XX, and the plurality of air guide plates 117 can be arranged sequentially along the direction from the third side 113 to the fourth side 114. The plurality of wind deflectors 117 can not only guide the incoming air but also improve the appearance of the suspended belt fan.

[0062] A side of the partition plate 441 facing the fan assembly 2 is a curved surface, wherein at least one first locking member 201 is arranged on the outside of the fan assembly 2, and wherein the inside of the housing 1a (such as a surface of the partition plate 441 facing the fan assembly 2) is provided with at least one second locking member 108, and wherein the at least one first locking member 201 and the at least one second locking member 108 cooperate with each other so that the fan assembly 2 is fastened in the receiving cavity 1b of the housing 1a, namely on the partition plate 441; and wherein the at least one first locking member 201 is provided in a number of more than 1 and the at least one second locking member 108 is provided in a number of more than 1, and wherein the plurality of first locking members 201 is each arranged on two sides of the fan assembly 2;and wherein the first locking member 201 is one of a projection and a groove, and the second locking member 201 is the other of a projection and a groove; and wherein the projection comprises a locking part.;

[0063] The installation housing 4 further includes at least one limiting and fixing member 443 connecting the partition plate 441 and extending toward the battery 32, wherein the at least one limiting and fixing member 443 is arranged around the periphery of the battery 32 and fixes the battery 32. In the present embodiment, the at least one limiting and fixing member 443 is provided in a number of more than one.

[0064] The control assembly 3a is located in the receiving cavity 1b and includes a control button 33 and a circuit board 31 electrically connecting the control button 33 and the battery 32, wherein the fourth side 114 of the housing 1a has a buttonhole 1130, and wherein the control button 33 is arranged corresponding to the buttonhole 1130 and is exposed through the buttonhole 1130.

[0065] The fan assembly 2 comprises a motor 21, a fan blade 22 and a fan housing, wherein the fan blade 22 is installed on the output shaft 23 of the motor 21, and wherein the motor 21 and the fan blade 22 are located in the fan housing 24.

[0066] The fan housing 24 comprises an air inlet cover 28, a housing body 25, an air outlet hood 26 and a spacer net 27, wherein the motor 21 and the fan blade 22 are both arranged in the housing body 25, and wherein the air outlet hood 26 is arranged on one side of the housing body 25 and has a plurality of air outlet holes, and wherein the air outlet hood 26 is also located at the air outlet 12 of the housing 1a, and wherein the spacer net 27 is arranged on the other side of the housing body 25 and is used to correspond to the air inlet 11, and wherein the air outlet hood 26 comprises a plurality of air guide rings 261 and an annular wall structure 262 connected to the periphery of the plurality of air guide rings 261, and wherein the spacer net 27 comprises a plurality of air inlet holes 270, and wherein between the plurality of Air guide rings 261 define a plurality of air outlet holes 263,and wherein the plurality of air guide rings 261 are used, in cooperation with the inner side surface of the annular wall structure 262, to compress and subsequently blow out the air flow coming from the housing body 25.

[0067] The inner side surface of the annular wall structure 262 is an inclined or curved surface so that the inner diameter of the annular wall structure 262 gradually decreases along the direction from the air inlet 11 to the air outlet 12 so that the blown wind has a pressing effect and the strength of the blown wind is improved.

[0068] Specifically, the housing body 25 includes a cylindrical side wall structure 251, a third installation portion 252 disposed at one end inside the side wall structure 251, and an air guide portion 253 connected between the third installation portion 252 and the side wall structure 251, wherein the fan blade 22 and the motor 21 are disposed inside the side wall structure 251 and on one side of the third installation portion 252, and wherein the motor 21 is installed on the third installation portion 252.

[0069] The air guide portion 253 includes a plurality of air guide blades 2531 arranged at intervals to direct the air coming from the fan blade in a predetermined direction. In particular, the thickness of each of the air guide blades 2531 may gradually increase along the direction from the fan blade 22 to the air outlet 12 to achieve a better wind guidance effect. The air inlet cover 28 may be annular, and the air inlet cover 28 may be attached to one end of the housing body 25. In particular, the outer side surface of one end of the housing body 25 may have a stepped groove 250. The air inlet cover 28 is attached and installed to the stepped groove 250, so that after installation, the outer side surface of the air inlet cover 28 is flush with the outer side surface of the housing body 25.The spacer net 27 may be installed on the inside of the air inlet cover 28. The air inlet cover 28 may be in snap-fit connection with the housing body 25.

[0070] The air outlet hood 26 further includes an installation structure 264 connecting the plurality of air guide rings 261. The installation structure 264 includes an annular installation wall 265, a cover plate 266 connecting the installation wall 265, and a first installation column 267 connected to the inside of the cover plate 266. The first installation column 267 is connected to the third installation section 252. In particular, the first installation column 267 can be detachably inserted into the installation hole of the third installation section 252, so that the air outlet hood 26 establishes a detachable connection with the housing body 25. The cover plate 266 is circular and located at the center of the plurality of air outlet holes 263. The outer surface of the cover plate 266 can have a groove for converging the blown air.

[0071] Specifically, the inner side surface of the annular wall structure 262 is an inclined or curved surface so that the inner diameter of the annular wall structure 262 gradually decreases along the first predetermined direction XX to make the blown wind have a pressing effect and improve the strength of the blown wind.

[0072] The spacer net 27 is a metal mesh provided with a plurality of air inlet holes 270. The plurality of air inlet holes 270 are used to reduce air resistance and increase air intake volume. Each air inlet hole 270 may be circular, and the diameters of the plurality of air inlet holes 270 may be the same, and the inner diameter of each air inlet hole 270 is in the range of 0.5 mm to 4 mm. Such a size can prevent foreign matter from being drawn into the interior of the fan assembly 2. It is understood that the spacer net 27 has a smaller thickness and lighter weight, which is conducive to miniaturization and lighter weight of the product. In addition, since it is a metal material, the dimensions of the air inlet holes of the spacer net 27 can be set smaller to effectively prevent foreign matter from entering the fan assembly 2.In addition, there are also a plurality of mounting holes 272 at the edges of the spacer net 27, wherein the plurality of mounting holes 272 are used to correspond with a plurality of mounting posts 256 on the housing body 25, and the mounting posts 256 extend into the mounting holes 272 to fix the spacer net 27 to the housing body 25. The spacer net 27 further has a plurality of flanges 273, and the mounting holes 272 are provided on the flanges 273.

[0073] The third installation portion 252 further includes a blind hole 254 disposed toward the motor 21, with the opening of the blind hole 254 facing a side where the motor 21 is located, and the blind hole 254 is used to store oil for lubricating the output shaft 23. Since it is a blind hole, oil drainage can be improved and the service life of the motor can be extended.

[0074] The third installation portion 252 has a hole 255, wherein a wire 29 connecting the motor 21 protrudes through the hole 255, then protrudes from the gap 258 between the housing body 25 and the air outlet hood 26, and connects the control assembly 3a (such as the circuit board 31).

[0075] A first alignment structure 268 is further arranged on the installation structure 264, wherein the housing body 25 has a second alignment structure 257, and wherein the first alignment structure 268 and the second alignment structure 257 cooperate to realize the alignment and assembly of the housing body 25 and the air outlet hood 26.

[0076] It is understood that in the present embodiment, the shell 1 comprises a first portion 1c and a second portion 1d, wherein the first portion 1c, the installation case 4 and the second portion 1d are arranged sequentially along the second predetermined direction YY to facilitate the assembly of the hanging waist fan.Specifically, the fan assembly 2 and the power supply assembly 3 may be installed on two sides of the installation casing 4, respectively. Then, the control assembly 3a is installed on another side of the installation casing 4, and through electrical connecting members such as a wire and a connector, the fan assembly 2, the power supply assembly 3, and the control assembly 3a are electrically connected. Finally, the first section 1c and the second section 1d are arranged along the second predetermined direction YY, respectively, on two sides of the installation casing 4, and along the second predetermined direction Y-Y, the first section 1c and the second section 1d are integrally assembled with the installation casing 4. It can be seen that with the structural arrangement of the shell 1 and the installation casing 4, the assembly of the hanging waist fan is made more efficient.

[0077] With reference to Fig. 13, a third embodiment of the present invention provides a hanging waist fan. In the hanging waist fan, the air intake holes 270 of the spacer mesh 27 are regular hexagons, and two adjacent air intake holes 270 share the same peripheral wall 271. With this design, the metal mesh mesh has the largest air intake area, the lightest weight, the smallest wind resistance, and the largest air intake volume. The width of the peripheral wall 271 is in the range of 0.05 mm to 2 mm.

[0078] With reference to Fig. 14, a fourth embodiment of the present utility model provides a hanging waist fan, wherein the hanging waist fan has substantially the same structure as the hanging waist fan in the second embodiment, that is, the description for the hanging waist fan of the second embodiment can substantially be applied to the hanging waist fan of the fourth embodiment, and the main difference between the two is that in the hanging waist fan of the fourth embodiment, the housing 1a includes a first portion 1e and a second portion 1d, wherein the first portion 1e corresponds to the structure and function of the first portion 1c and the installation case 4, which are integrally assembled in the second embodiment, that is,the first section 1e has an air inlet 11 and an air outlet 12 and can receive and fix the fan assembly 2, and the fan assembly 2 can be installed in the first section 1e from the air outlet 12.

[0079] In particular, the first section 1e and the second section 1d are arranged one after the other along the second predetermined direction Y - Y, wherein a plurality of first locking elements 118a are arranged on the edge of the first section 1e, and wherein a plurality of second locking elements 119a are arranged on the edge of the second section 1d, and wherein the plurality of first locking elements 118a and the plurality of second locking elements 119a cooperate to integrally connect the first section 1e and the second section 1d.

[0080] With reference to Fig. 15, a fifth embodiment of the present utility model provides a hanging waist fan, wherein the hanging waist fan has substantially the same structure as the hanging waist fan in the second embodiment, that is, the description for the hanging waist fan of the second embodiment can substantially be applied to the hanging waist fan of the fifth embodiment, and the main difference between the two is that in the hanging waist fan of the fifth embodiment, the housing 1a includes a first portion 1c and a second portion 1f, wherein the second portion 1f corresponds to the structure and function of the second portion 1d and the installation case 4, which are integrally assembled in the second embodiment, that is,the first section 1c and the second section 1f jointly enclose the air inlet 11 and the air outlet 12, wherein the fan assembly 2 is attached to the first section 1c or the second section 1f, and wherein a side of the second section 1f facing the fan assembly 2 has an installation groove 1g in which the power supply assembly 3 can be installed. During assembly, the power supply assembly 3 can be first installed in the installation groove 1g, then the control assembly 3a is installed in the second section 1f, after which the fan assembly 2 is installed on the first section 1c or the second section 1f, and the fan assembly 2, the control assembly 3a, and the power supply assembly 3 are electrically connected, and finally, the first section 1c and the second section 1f are assembled along the second predetermined direction YY.

[0081] With reference to Fig. 16 to 21, a sixth embodiment of the present utility model provides a hanging waist fan, the hanging waist fan having substantially the same structure as the hanging waist fan in the second embodiment, ieThe description for the hanging waist fan of the second embodiment can be substantially applied to the hanging waist fan of the sixth embodiment, and the following mainly explains the key portion of the sixth embodiment: specifically, the installation portion 252 includes an installation plate 2521 and a second installation column 2522 connecting the installation plate 2521 and extending toward the spacer net 27, the blind hole 254 being provided on the second installation column 2522; and the motor 21 has a motor installation hole 210 attached to the second installation column 2522, so that the motor 21 is installed on the second installation column 2522.

[0082] Furthermore, a fastening column 212 and a limiting ring 213 having through holes are arranged in the blind hole 254. The output shaft 23 comprises a main body 231 connecting the fan blade 22 and a limiting portion 232 connecting the main body 231. The main body 231 of the output shaft 23 successively passes through the fastening column 212 and the limiting ring 213, causing the limiting portion 232 to be located at an end of the limiting ring remote from the fastening column 212. The limiting portion 232 comprises a rod portion 2321 and a limiting end 2322 connecting an end of the rod portion 2321 remote from the fan blade 22. The diameter of the limiting end 2322 gradually decreases in a direction away from the fan blade 22.and wherein the outer surface of the rod portion 2321 includes a limiting groove with the limiting end 2322 and the main body 231, and wherein the limiting ring 213 has a limiting hole 2130, and wherein the diameter of the limiting hole 2130 is larger than that of the rod portion 2321 and smaller than that of the main body 231 and smaller than that of the limiting end 2322, so that the limiting ring 213 is limited in the limiting groove.

[0083] The fixing column 212 may be a copper column, and the limiting ring 213 may be an elastic spring washer such as a torsion spring or a retaining spring.

[0084] It is understood that by setting the above structure, the limiting ring 213 is limited in the limiting groove 2323 and the output shaft 23 drives the fan blade 22 to move in a limited manner in the limiting groove 2323 along the length range of the extending direction of the output shaft, and in particular, the output shaft 23 and the fan blades 22 have a first limiting position which is in Fig. 19, or a second limit position shown in Fig. 20, so that the fan blade 22 can be placed in a hanging position with respect to the motor 21. During the rotation of the output shaft 23 and the fan blade 22, the limit ring 213 can create a space for the movement of the two, so that the rotation of the output shaft 23 and the fan blade 22 is more smooth and thus the service life of the fan assembly 2 can be extended.

[0085] The wire 29 connecting the motor 21 can pass through the hole 100 inside the housing 1a (such as installation housing 4) to be electrically connected to the battery 32 of the power supply assembly 3.

[0086] The fan assembly 2 may further be provided with a positioning column 200, which may be located at the center position of the outer side surface of the fan assembly 2. Furthermore, the positioning column 200 may protrude into the positioning hole 400 inside the housing 1a to be further assembled and positioned with the installation housing 4.

Claims

[1] Hanging waist fan, comprising the following: a housing (1a) comprising a receiving cavity (1b), an air inlet (11) and an air outlet (12), wherein the air outlet (12) and at least a part of the receiving cavity (1b) are connected to the air inlet (11) one after the other along a first predetermined direction (XX); a fan assembly (2) located in the receiving cavity (1b) and between the air inlet (11) and the air outlet (12) for driving the air flow to flow from the air inlet (11) to the air outlet (12); a power supply assembly (3) located in the receiving cavity (1b), wherein the power supply assembly (3) is arranged offset from the projection of the fan assembly (2) along the first predetermined direction (XX), and wherein the power supply assembly (3) is electrically connected to the fan assembly (2) to supply the fan assembly (2) with power; and and a first clamping device (7) connected to one side of the housing (1a) and used to form with the housing (1a) a clamping space for clamping an external object to fix the hanging waist fan to the external object. [2] A hanging waist fan according to claim 1, wherein the housing (1a) has a first side (111), a second side (112) and a third side (113), and wherein the first side (111) and the second side (112) are arranged opposite to each other, and wherein the air outlet (12) is provided on the first side (111) and the air inlet (11) is provided on the second side (112), and wherein the third side (113) is located between the first side (111) and the second side (112) and is adjacent to both the first side (111) and the second side (112), and wherein the first tensioning device (7) extends along the first predetermined direction (XX) and is connected to the third side (113) of the housing (1a);and wherein the housing (1a) further comprises a fourth side (114), a fifth side (115), and a sixth side (116), and wherein the fourth side (114) and the third side (113) are arranged opposite each other, and wherein the fifth side (115) and the sixth side (116) are arranged opposite each other, and wherein the direction from the fifth side (115) to the sixth side (116) is a second predetermined direction (YY), and wherein the fan assembly (2) and the power supply assembly (3) are arranged sequentially along the second predetermined direction (YY); and wherein the hanging waist fan further comprises a second clamping device (8) connected to the fourth side (114) of the housing (1a), and wherein the second clamping device (8) is also used to form a clamping space with the housing (1a) for clamping an external object in order to attach the hanging waist fan to the external object;and wherein the first clamping device (7) is connected to an end of the third side (113) of the housing (1a) facing the air outlet (12), and wherein the second clamping device (8) is connected to an end of the fourth side (114) of the housing (1a) facing the air inlet (11), and wherein the second clamping device (8) extends in a direction opposite to that of the first clamping device (7); and wherein the direction from the third side (113) to the fourth side (114) is a third predetermined direction (ZZ), and wherein the maximum diameter of the housing (1a) along the second predetermined direction (YY) is greater than the maximum diameter of the housing (1a) along the third predetermined direction (ZZ);and wherein a first hook (105) is further arranged at an end of the fifth side (115) of the housing (1a) facing the air outlet (12), and wherein two ends of the first hook (105) are each connected to the fifth side (115) of the housing (1a) and form a first hook hole (1051) with the housing (1a); and wherein a second hook (105) is further arranged at an end of the sixth side (116) of the housing (1a) facing the air outlet (12), and wherein two ends of the second hook (106) are each connected to the sixth side (116) of the housing (1a) and form a second hook hole (1061) with the housing (1a). [3] A hanging waist fan according to claim 1, wherein the fan assembly (2) is provided with at least one first locking member (201), and wherein the inside of the housing (1a) is provided with at least one second locking member (108), and wherein the at least one first locking member (201) and the at least one second locking member (108) cooperate with each other so that the fan assembly (2) is fixed in the receiving cavity (1b) of the housing (1a); and wherein the at least one first locking member (201) is provided in a number greater than 1 and the at least one second locking member (108) is provided in a number greater than 1, and wherein the plurality of first locking members (201) are respectively arranged on two sides of the fan assembly (2); and wherein the first locking member (201) is one of a projection and a groove, and the second locking member (108) is the other of a projection and a groove; and wherein the projection comprises a locking part. [4] A hanging waist fan according to claim 1, wherein the fan assembly (2) comprises a motor (21), a fan blade (22), and an output shaft (23), and wherein the fan blade (22) is installed on the output shaft (23), and wherein the fan assembly (2) is an axial flow fan assembly (2), and wherein the output shaft (23) is arranged along the first predetermined direction (XX); and wherein the fan assembly (2) further comprises a fan casing (24) comprising a casing body (25), an air outlet hood (26), and a spacer net (27), and wherein the motor (21) and the fan blade are both arranged in the casing body (25), and wherein the air outlet hood (26) is arranged on one side of the casing body (25) and has a plurality of air outlet holes (263), and wherein the air outlet hood (26) is also located on the air outlet (12) is located,and wherein the spacer net (27) is arranged on the other side of the housing body (25), and wherein the air outlet hood (26) comprises a plurality of air guide rings (261) and an annular wall structure (262) connected to the periphery of the plurality of air guide rings (261), and wherein the spacer net (27) comprises a plurality of air inlet holes (270), and wherein a plurality of air outlet holes (263) are defined between the plurality of air guide rings (261), and wherein the plurality of air guide rings (261) are used, in cooperation with the inner side surface of the annular wall structure (262), to compress and subsequently blow out the air flow coming from the housing body (25). [5] The hanging waist fan according to claim 4, wherein the inner side surface of the annular wall structure (262) is an inclined or curved surface such that the inner diameter of the annular wall structure (262) gradually decreases along the first predetermined direction (XX); and wherein the spacer net (27) is a metal mesh net provided with a plurality of air inlet holes (270), and wherein each of the air inlet holes (270) has an inner diameter in the range of 0.5 mm to 4 mm; and wherein the air inlet holes (270) are regular hexagons, and wherein two adjacent air inlets (11) share the same peripheral wall, and wherein the width of the peripheral wall is in the range of 0.05 mm to 2 mm. [6] The hanging waist fan according to claim 4, wherein the air outlet hood (26) further comprises an installation structure (264) connecting the plurality of air guide rings (261), the installation structure (264) comprising an annular installation wall (265), a cover plate (266) connecting the installation wall (265), and a first installation column (267) connected to the inside of the cover plate (266), and the first installation column (267) is installed to correspond to the case body (25);and wherein the cover plate (266) is located in the center of the plurality of air outlet holes (263), and wherein the outer surface of the cover plate (266) has a groove, and wherein a first alignment structure (268) is further arranged on the installation structure (264), and wherein the housing body (25) has a second alignment structure (257), and wherein the first alignment structure (268) and the second alignment structure (257) cooperate to realize the alignment and assembly of the housing body (25) and the air outlet hood (26);and wherein the housing body (25) comprises an annularly arranged side wall structure (251), an installation section (252) located at one end in the side wall structure (251), and an air guide section (253) connected between the installation section (252) and the side wall structure (251), and wherein the air guide section (253) comprises a plurality of air guide blades (2531) arranged at intervals to direct the air coming from the fan blade (22) in a predetermined direction, and wherein the fan blade (22) and the motor (21) are arranged in the side wall structure (251) and are located on one side of the installation section (252), and wherein the motor (21) is installed on the installation section (252);and wherein the installation portion (252) has a bore (255), and wherein a wire connecting the motor (21) protrudes through the bore (255), then protrudes from the gap between the housing body (25) and the air outlet hood (26) and connects the control assembly (3a); [7] A hanging waist fan according to claim 6, wherein the installation portion (252) further comprises a blind hole (254) disposed toward the motor (21), and wherein the opening of the blind hole (254) faces a side on which the motor (21) is located, and wherein the blind hole (254) is used to store the oil required for the rotation of the output shaft (23); and wherein the installation section (252) comprises an installation plate (2521) and a second installation column (2522) connecting the installation plate (2521) and extending toward the spacer net (27), and wherein the blind hole (254) is provided on the second installation column (2521); and wherein the motor (21) has a motor installation hole (210) attached to the second installation column (2521) so that the motor (21) is installed on the second installation column (2521),and wherein a fastening column (212) and a limiting ring (213) having through holes are further arranged in the blind hole (254), and wherein the output shaft (23) comprises a main body (231) connecting the fan blade (22) and a limiting portion (232) connecting the main body (231), and wherein the output shaft (23) passes through the fastening column (212) and the limiting ring (213) and causes the limiting portion (232) to be located at an end of the limiting ring (213) facing away from the fastening column (212), and wherein the limiting portion (232) comprises a rod portion (2321) and a limiting end (2322) connecting an end of the rod portion (2321) facing away from the fan blade (22), and wherein the diameter of the limiting end (2322) in a direction away from the blade (22) gradually decreases,and wherein the outer surface of the rod portion (2321) includes a limiting groove with the limiting end (2322) and the main body (231), and wherein the limiting ring (213) has a limiting hole (2130), and wherein the diameter of the limiting hole (2130) is larger than that of the rod portion (2321) and smaller than that of the main body (231) and smaller than that of the limiting end (2322), so that the limiting ring (213) is limited in the limiting groove. [8] The hanging waist fan according to claim 4, wherein the fan housing (24) further comprises an air inlet cover (28), and wherein the spacer net (27) is installed on the inside of the air inlet cover (28), and wherein the air inlet cover (28) is arranged on an end of the housing body (25) facing away from the air outlet hood (26), and wherein the air inlet cover (28) is annular, and wherein the air inlet cover (28) is attached to one end of the housing body (25); and wherein the outer side surface of one end of the housing body (25) may have a stepped groove, and wherein the air inlet cover (28) is attached and installed on the stepped groove, and wherein the outer side surface of the air inlet cover (28) is flush with the outer side surface of the housing body (25). [9] A hanging waist fan according to claim 2, wherein the housing (1a) comprises a first portion (1c) and a second portion (1d), and wherein the first portion (1c) and the second portion (1d) are arranged one after the other along the second predetermined direction (YY), wherein a plurality of first locking elements (118a) are arranged on the edge of the first portion (1c), and wherein a plurality of second locking elements (119a) are arranged on the edge of the second portion (1d), and wherein the plurality of first locking elements (118a) and the plurality of second locking elements (119a) cooperate to integrally connect the first portion (1c) and the second portion (1d) to each other;and wherein the housing (1a) comprises a first section (1c), a second section (1d), and an installation housing (4), and wherein the first section (1c), the installation housing (4), and the second section (1d) are arranged one after the other along the second predetermined direction (YY), wherein a plurality of first locking elements (118a) are arranged on the edge of the first section (1c), and wherein a plurality of second locking elements (119a) are arranged on the edge of the second section (1d), and wherein a plurality of third locking elements (401) which interact in a locking manner with the plurality of first locking elements (118a), and a plurality of fourth locking elements (402) which interact in a locking manner with the plurality of second locking elements (119a) are arranged on the installation housing (4), so that the installation housing (4), the first section (1c), and the second section (1d) are connected to one another in one piece;and wherein the inside of the housing (1a) further comprises a plurality of air guide plates (117) arranged corresponding to the air inlet (11), and wherein the plurality of air guide plates (114) are located between the air inlet (11) and the fan assembly (2), and wherein each air guide plate (114) extends along the first predetermined direction (XX), and wherein the plurality of air guide plates (114) are arranged sequentially along the direction from the third side (113) to the fourth side (114); [10] A hanging waist fan according to claim 1, wherein the housing (1a) comprises a shell (1) and an installation housing (4) located in the shell (1), and wherein the installation housing (4) comprises a partition plate (441), and wherein the fan assembly (2) and the power supply assembly (3) are respectively located on two sides of the partition plate (441); and wherein the first clamping device (7) is connected to the installation housing (4) and formed integrally with the installation housing (4), and wherein the shell (1) has a slot (14), and wherein a portion of the first clamping device (7) connected to the installation housing (4) is fixed in the slot (14);and wherein the power supply assembly (3) comprises a battery (32), and wherein the installation housing (4) further comprises at least one limiting and fixing element (443) connecting the partition plate (441) and extending toward the battery (32), wherein the at least one limiting and fixing element (443) is arranged around the periphery of the battery (32) and fixes the battery (32); and wherein the hanging waist fan further comprises a control assembly (3a), and wherein the control assembly (3a) is located in the receiving cavity (1b) and comprises a control button (33) and a circuit board electrically connecting the control button (33) and the battery (32), and wherein the third side (113) of the housing (1a) has a buttonhole (1130), wherein the control button (33) is arranged corresponding to the buttonhole (1130).

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