Portable fan

Abstract

The utility model relates to the technical field of fans, in particular to a portable fan. The portable fan comprises a motor assembly and a connecting base which are connected, the motor assembly comprises a support and a motor body, the support comprises a fixing disc and a boss arranged on the fixing disc, the fixing disc is connected with the connecting base, and the motor body and the boss are coaxially arranged. According to the utility model, the support comprises the fixed disc and the boss, the boss is used for connecting the motor main body, and the motor assembly and the connecting seat can be assembled only by connecting the fixed disc with the connecting seat. The support and the motor body form an integral motor assembly for assembly, the advantage of modular assembly is formed, the assembly of the motor assembly and the connecting base is simple and efficient, the assembly efficiency and the assembly yield can be improved, the arrangement of the support avoids direct assembly of the stator and the rotating shaft with the connecting base, and the assembly efficiency is improved. The influence of the assembling process on the stability of the assembled motor main body is reduced, and the working reliability of the portable fan is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially portable fan. BACKGROUND

[0002] The portable fan is mainly used for accelerating air circulation in hot weather and providing instant coolness for users. The motor assembly converts electrical energy into mechanical energy to drive the blade of the fan to rotate. The motor assembly is the core component of the portable fan, which is crucial to the performance and service life of the portable fan. The stator is the stationary part of the motor assembly, which needs to be fixed at a specific position. The rotating shaft is the component connecting the stator and the rotor, which needs to cooperate with the connecting seat to ensure the smooth operation of the rotating part of the motor. The motor body of the existing motor assembly is usually directly assembled with the connecting seat at the front end of the portable fan. However, such assembly structure will lead to more components involved in assembly, increase the complexity of assembly, prolong the assembly time and increase the possibility of assembly errors, and reduce the assembly yield. At the same time, the stability of the assembled motor assembly is difficult to guarantee. SUMMARY

[0003] To solve the above problems, the utility model provides a kind of portable fan.

[0004] The utility model provides a kind of portable fan to solve the above technical problems, rear end air inlet, front end air outlet, the portable fan includes the motor assembly and connecting seat connected, the motor assembly includes support and motor body, the support includes fixed disc and the boss of setting on the fixed disc, the fixed disc is connected with the connecting seat, and the motor body is coaxially arranged with the boss;The motor body includes fixing mechanism and rotating mechanism, the fixing mechanism is arranged on the boss, and the rotating mechanism is rotatably connected with the fixing mechanism, and the rotating mechanism is provided with fan away from the connecting seat side, and the rotating mechanism is fixedly connected with fan.

[0005] Preferably, the portable fan further includes a housing, an air inlet passage is defined between the fan and the housing, an air outlet passage is defined between the connecting seat and the housing, a plurality of connecting leaves are provided between the connecting seat and the housing, the diameter of the end of the connecting seat close to the motor assembly is less than or equal to the diameter of the end of the connecting seat away from the motor assembly;A first groove is formed in the side of the connecting seat facing the motor assembly, and the fixed disc is at least partially arranged in the first groove.

[0006] Preferably, the shell comprises an outer shell and an inner shell, at least part of the inner shell is arranged radially inward of the outer shell, and a plurality of the connecting blades connect the inner shell and the connecting seat; the side of the fixing disc comprises an arc segment and a straight segment connected to each other, the straight segment is provided with a first clamping piece, the first slot is provided with a first clamping groove corresponding to the first clamping piece, and the first clamping piece is clamped with the first clamping groove.

[0007] Preferably, a surface of the boss connected with the fixing disc is annularly provided with a second clamping piece, an inner surface of the fixing disc connected with the boss is annularly provided with a corresponding third clamping piece, and the second clamping piece and the third clamping piece are connected in cooperation.

[0008] Preferably, the fixing mechanism comprises a stator, the rotating mechanism comprises a rotor magnetic ring and a rotating shaft, the stator is fixedly sleeved on the boss, the rotor magnetic ring is annularly arranged outside the stator, the rotating shaft is at least partially rotatably arranged in the boss, the fan comprises a rotating seat and a blade, the blade is arranged on the rotating seat, the rotor magnetic ring is fixedly connected with the rotating seat, and one end of the rotating shaft protruding out of the boss is fixedly connected with the rotating seat.

[0009] Preferably, the rotating seat is provided with a second slot on a side close to the motor body, the boss protrudes into the second slot, the stator and the rotor magnetic ring are located in the second slot, the rotor magnetic ring is fixedly connected to an inner side wall of the second slot, and one end of the rotating shaft protruding out of the boss is fixedly connected to an inner bottom wall of the second slot.

[0010] Preferably, the second slot further comprises a connecting portion, the connecting portion protrudes towards the boss, the connecting portion is provided with a connecting cavity corresponding to the rotating shaft, and one end of the rotating shaft protruding out of the boss is inserted into the connecting cavity.

[0011] Preferably, the motor assembly further comprises a bearing, the bearing is arranged at both ends of the boss, the rotating shaft, the bearing and the boss are coaxially arranged in sequence, an elastic piece is sleeved on the rotating shaft, one end of the elastic piece abuts against the second slot, and the other end of the elastic piece abuts against the bearing towards the second slot.

[0012] Preferably, a gap is left between the connecting seat and the rotating seat, the gap is between 1mm and 3mm, a direction from the motor assembly to the connecting seat is an air outlet direction, a radial direction of the rotating seat increases along the air outlet direction, and a maximum diameter of the rotating seat is less than or equal to a maximum diameter of the connecting seat.

[0013] Preferably, the fixing disc and the connecting seat are provided with corresponding through holes, the connecting seat is provided with a third groove away from the fixing disc, the portable fan further comprises a circuit board and a wire, the circuit board is arranged in the third groove, and the wire passes through the through hole and is connected with the circuit board and the motor body respectively at two ends.

[0014] Compared with the prior art, the portable fan has the following advantages:

[0015] 1、the portable fan in the embodiment of the utility model includes motor assembly and connecting seat which are connected, the motor assembly includes support and motor body, the support includes fixing disc and boss which are arranged on the fixing disc, the fixing disc is connected with the connecting seat, and the motor body is coaxially arranged with the boss; the motor body includes fixing mechanism and rotating mechanism, the fixing mechanism is arranged on the boss, the rotating mechanism is rotationally connected with the fixing mechanism, the rotating mechanism is provided with fan away from the connecting seat, and the rotating mechanism is fixedly connected with the fan. Since the motor assembly includes the support and the motor body, the support and the motor body form the overall motor assembly, which is convenient for modular assembly; by arranging the support to include the fixing disc and the boss, the boss is used for connecting the motor body, only the fixing disc needs to be connected with the connecting seat, so that the assembly of the motor assembly and the connecting seat can be realized. When the motor assembly works, the rotating mechanism drives the fan to rotate to provide wind power. Compared with the stator and the rotating shaft in the existing assembly structure which are directly assembled with the connecting seat, the utility model adopts the overall motor assembly formed by the support and the motor body for assembly, so that the advantages of modular assembly are formed, the boss at one end of the support is used for connecting the motor body, which is beneficial to form the modular motor assembly, the fixing disc at the other end is used for being connected with the connecting seat, so that the assembly of the motor assembly and the connecting seat is simple and efficient, the assembly efficiency and the assembly yield can be improved, the support is arranged to avoid the stator and the rotating shaft being directly assembled with the connecting seat, so that the negative influence of the stability of the assembled motor body in the assembly process is reduced, and the reliability of the portable fan in work is improved.

[0016] 2、The portable fan in one embodiment of the utility model still includes a shell, the fan and the shell define an air inlet channel between them, the connecting seat and the shell define an air outlet channel between them, a plurality of connecting leaves are arranged between the connecting seat and the shell, the diameter of the connecting seat near one end of the motor assembly is less than or equal to the diameter of the connecting seat away from the motor assembly; a first groove is formed on the side of the connecting seat facing the motor assembly, and the fixing disc is at least partially arranged in the first groove. The connecting leaves play a role in guiding air, and the diameter of the connecting seat near one end of the motor assembly is less than or equal to the diameter of the connecting seat away from the motor assembly, which can play a role in pressurization and improve the air supply distance. By forming the first groove in the connecting seat and arranging the fixing disc to extend into the first groove, the connection between the connecting seat and the fixing disc is more stable, preventing relative displacement of the connecting seat and the fixing disc due to stress, and at the same time, the fixing disc is at least partially arranged in the first groove, and the first groove also plays a role in accommodating and protecting the fixing disc.

[0017] 3、The shell in one embodiment of the utility model includes an outer cover and an inner cover, at least part of the inner cover is arranged on the radial inner side of the outer cover, and a plurality of connecting leaves connect the inner cover and the connecting seat; the side surface of the fixing disc includes an arc segment and a straight segment connected together, the straight segment is provided with a first clamping piece, the first groove is provided with a first clamping groove corresponding to the first clamping piece, and the first clamping piece is clamped with the first clamping groove. Since at least part of the inner cover is arranged on the radial inner side of the outer cover, and a plurality of connecting leaves connect the inner cover and the connecting seat, the above arrangement has the advantages of easy production and molding and convenient assembly. Since the straight segment is provided with the first clamping piece, the first groove is provided with the first clamping groove corresponding to the first clamping piece, and the first clamping piece corresponds to the first clamping groove, which can make the connecting seat and the fixing disc more easily aligned during assembly, and at the same time, the clamping relationship between the first clamping piece and the first clamping groove can also firmly fix the fixing disc and the connecting seat, avoiding relative sliding of the fixing disc and the connecting seat and affecting the structural stability.

[0018] 4、The surface of the boss connected with the fixing disc is annularly provided with a second clamping piece, the inner surface of the fixing disc connected with the boss is annularly provided with a corresponding third clamping piece, and the second clamping piece and the third clamping piece are connected in cooperation. Since the boss and the fixing disc are connected in cooperation through the second clamping piece and the third clamping piece, the contact area and the roughness of the contact surface of the boss and the fixing disc can be increased, the boss and the fixing disc are more closely connected in cooperation, and in the environment of high-speed operation of the motor body, micro-motion wear caused by vibration conduction of the motor body can be avoided, and the structural strength of the whole support is improved.

[0019] 5. In one embodiment of this utility model, the fixing mechanism includes a stator, and the rotating mechanism includes a rotor magnetic ring and a rotating shaft. The stator is fixedly sleeved on the boss, the rotor magnetic ring is arranged around the stator, and the rotating shaft is at least partially rotatably inserted into the boss. The fan includes a rotating seat and blades, the blades are arranged on the rotating seat, the rotor magnetic ring is fixedly connected to the rotating seat, and one end of the rotating shaft extends out of the boss and is fixedly connected to the rotating seat. Because the rotating seat is fixedly connected to the rotor magnetic ring, and one end of the rotating shaft is connected to the rotating seat, when the rotor magnetic ring arranged around the stator rotates, it can drive the rotating seat and the blades to rotate, thereby achieving the blowing function of accelerating airflow.

[0020] 6. In one embodiment of this utility model, a second groove is provided on the side of the rotating base near the motor body. A boss extends into the second groove, and the stator and rotor magnetic rings are located within the second groove. The rotor magnetic ring is fixedly connected to the inner wall of the second groove, and one end of the rotating shaft extending out of the boss is fixedly connected to the inner bottom wall of the second groove. By providing the second groove, the second groove protects and accommodates the stator and rotor magnetic rings and reduces noise. The rotor magnetic ring is fixedly connected to the inner wall of the second groove, and the end of the rotating shaft extending out of the boss is fixedly connected to the inner bottom wall of the second groove, enabling the rotating base, rotor magnetic ring, and rotating shaft to rotate in the same direction with a high connection strength.

[0021] 7. In one embodiment of this utility model, the second groove further includes a connecting portion, which protrudes towards the boss and has a connecting cavity corresponding to the rotating shaft. One end of the rotating shaft extending out of the boss is inserted into the connecting cavity. Because the connecting portion protrudes towards the boss and has a connecting cavity corresponding to the rotating shaft, the protruding shape of the connecting portion allows the connecting cavity to have a deeper cavity depth, improving the connection strength of the rotating shaft inserted into the connecting cavity and achieving a tight connection between the rotating seat and the rotating shaft.

[0022] 8. In one embodiment of this utility model, the motor assembly further includes bearings, which are disposed at both ends of the boss. The rotating shaft, bearings, and boss are coaxially arranged in sequence. An elastic element is sleeved on the rotating shaft, with one end of the elastic element abutting against the second groove and the other end abutting against the bearing facing the second groove. The bearing can reduce the friction during the rotation of the rotating shaft, reduce energy consumption, and improve motor efficiency; it also maintains the stable rotation of the rotating shaft and reduces vibration. The two ends of the elastic element abut against the rotating seat and the bearing respectively, and can rotate together with the rotating seat and the bearing. The elastic element can prevent the rotating seat from vibrating in the axial direction with its elastic force, which helps to reduce operating noise and improve the user experience.

[0023] 9、The gap between the connecting seat and the rotating seat in one embodiment of the utility model leaves a gap, the gap is between 1mm to 3mm;The direction from the motor assembly to the connecting seat is the air outlet direction, the radial direction of the rotating seat increases along the air outlet direction, and the maximum diameter of the rotating seat is less than or equal to the maximum diameter of the connecting seat. The gap between the connecting seat and the rotating seat ensures that the rotating seat maintains a certain safety distance from the connecting seat during operation, and the connecting seat does not block the normal operation of the rotating seat;At the same time, the wind generated by the fan can be smoothly sent forward to the connecting seat, reducing the loss of wind. The radial direction of the rotating seat increases along the air outlet direction, and the maximum diameter of the rotating seat is less than or equal to the maximum diameter of the connecting seat, which can appropriately increase the wind pressure and is beneficial to increasing the air supply distance.

[0024] 10、The fixed disc and the connecting seat in one embodiment of the utility model are provided with corresponding through holes, the connecting seat is provided with a third groove away from the fixed disc, the portable fan further comprises a circuit board and a wire, the circuit board is arranged in the third groove, the wire passes through the through hole, and the two ends of the wire are connected with the circuit board and the motor body respectively. The circuit board can be responsible for realizing current commutation, switching the current in each phase of the motor by controlling the electronic elements on the circuit board;And control the speed and torque of the motor. The third groove plays a role of accommodating and protecting the circuit board, and the through hole for the wire to pass through is convenient for the wire to connect the circuit board and the motor body on both sides of the connecting seat.

DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 It is the three-dimensional structure schematic diagram of the portable fan provided by the first embodiment of the utility model.

[0027] Figure 2 It is the explosion structure schematic diagram of the portable fan provided by the first embodiment of the utility model.

[0028] Figure 3 It is the explosion structure schematic diagram of the portable fan provided by the first embodiment of the utility model.

[0029] Figure 4 It is the section structure schematic diagram of the partial structure of the portable fan provided by the first embodiment of the utility model. Figure 1 .

[0030] Figure 5It is the cross section structure schematic view of the part structure of the portable fan provided by the first embodiment of the utility model Figure 2 .

[0031] Figure 6 It is the explosion structure schematic view of the support of the portable fan provided by the first embodiment of the utility model.

[0032] Figure 7 It is the cross section structure schematic view of the motor assembly and the fan cooperation of the portable fan provided by the first embodiment of the utility model.

[0033] Explanation of the attached drawing:

[0034] 1, portable fan;

[0035] 11, fan head;12, handle;20, motor assembly;21, support;22, motor main body;23, bearing;24, elastic piece;30, connecting seat;31, first slot;32, third slot;33, connecting blade;40, fan;41, rotating seat;42, blade;50, screw rod;51, screw hole;60, gap;70, through hole;80, circuit board;81, wire;

[0036] 111, front cover;112, shell;113, rear cover;211, fixed disc;212, boss;221, fixed mechanism;222, rotating mechanism;311, first clamping groove;312, protruding part;313, limiting piece;411, second slot;

[0037] 1121, air inlet channel;1122, air outlet channel;1123, outer cover;1124, inner cover;2111, arc segment;2112, straight segment;2113, first clamping piece;2114, limiting hole;2115, third clamping piece;2116, key groove;2117, blocking piece;2121, second clamping piece;2122, key tooth;2211, stator;2212, motor support;2213, winding part;2214, winding;2221, rotor magnetic ring;2222, rotating shaft;4111, connecting part;4112, connecting cavity.

DETAILED DESCRIPTION

[0038] In order to make the utility model's purpose, technical scheme and advantage more clearly, the following is combined with the drawing and embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0039] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are made only for ease of description.

[0040] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0041] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0042] In addition, the terms "mounting", "setting", "providing", "connecting", "connecting" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Please refer to Figures 1 to 4 The portable fan 1 provided by the first embodiment of the present application has rear end air inlet and front end air outlet, and comprises a motor assembly 20 and a connecting seat 30 connected with each other. The motor assembly 20 comprises a support 21 and a motor body 22. The support 21 comprises a fixed disc 211 and a boss 212 arranged on the fixed disc 211. The fixed disc 211 is connected with the connecting seat 30. The motor body 22 is coaxially arranged with the boss 212. The motor body 22 comprises a fixing mechanism 221 and a rotating mechanism 222. The fixing mechanism 221 is arranged on the boss 212. The rotating mechanism 222 is rotationally connected with the fixing mechanism 221. The rotating mechanism 222 is provided with a fan 40 on the side away from the connecting seat 30. The rotating mechanism 222 is fixedly connected with the fan 40.

[0044] It can be understood that, since the motor assembly 20 comprises the bracket 21 and the motor body 22, the bracket 21 and the motor body 22 constitute the integral motor assembly 20, facilitating modular assembly; by arranging that the bracket 21 comprises the fixing disc 211 and the boss 212, the boss 212 is used for connecting the motor body 22, and only the fixing disc 211 needs to be connected with the connecting seat 30, so that the assembly of the motor assembly 20 and the connecting seat 30 can be realized. In the working process of the motor assembly 20, the rotating mechanism 222 drives the fan 40 to rotate to provide wind power, the end of the portable fan 1 corresponding to the fan 40 is defined as the rear end, the end corresponding to the connecting seat 30 is defined as the front end, and the airflow direction is that the air enters from the rear end and the air exits from the front end. Compared with the prior art in which the motor body 22 is directly assembled with the connecting seat 30, resulting in that the assembly involves many components and has a negative impact on the assembly yield and stability, the utility model adopts the motor assembly 20 composed of the bracket 21 and the motor body 22 for assembly, thereby forming the advantage of modular assembly, the boss 212 at one end of the bracket 21 is used for connecting the motor body 22, which is beneficial to forming the modular motor assembly 20, the fixing disc 211 at the other end is used for connecting with the connecting seat 30, so that the assembly of the motor assembly 20 and the connecting seat 30 is simple and efficient, the assembly efficiency and yield can be improved, the bracket 21 avoids the direct assembly of the motor body 22 with the connecting seat 30, reduces the negative impact of the assembly process on the stability of the assembled motor body 22, and improves the reliability of the portable fan 1 in operation.

[0045] Optionally, as a specific embodiment, the connecting seat 30 is a pressurizing seat. The pressurizing seat is helpful to guide the airflow direction, so that the air is more concentrated and orderly; and can increase the air pressure, so that the wind power can be more effectively transmitted to a farther distance, which is helpful to realize long-distance air supply. The assembly of the motor assembly 20 and the pressurizing seat can improve the degree of modular assembly, improve the assembly efficiency and yield, and make the overall structure of the portable fan 1 more compact.

[0046] Optionally, as a specific embodiment, the portable fan 1 comprises a handle 12 and a fan head 11 connected with each other, the fan head 11 comprises a front cover 111, an outer shell 112 and a rear cover 113 arranged in sequence, and the motor assembly 20 and the connecting seat 30 are arranged in a space enclosed by the front cover 111, the outer shell 112 and the rear cover 113. It should be noted that the portable fan 1 can be a handheld fan, a desktop fan, a clip fan, a variable fan or the like, which is not limited herein.

[0047] Please refer to Figures 2 to 5Further, the portable fan 1 further comprises a housing 112, the fan 40 and the housing 112 define an air inlet channel 1121, the connecting seat 30 and the housing 112 define an air outlet channel 1122, a plurality of connecting leaves 33 are arranged between the connecting seat 30 and the housing 112, the diameter of the connecting seat 30 close to the motor assembly 20 is less than or equal to the diameter of the connecting seat 30 away from the motor assembly 20; the first groove 31 is arranged on the side of the connecting seat 30 close to the motor assembly 20, and the fixing disc 211 is at least partially arranged in the first groove 31.

[0048] Understandably, the connecting leaves 33 play a role in guiding air, and the diameter of the connecting seat 30 close to the motor assembly 20 is less than or equal to the diameter of the connecting seat 30 away from the motor assembly 20, which can play a role in pressurization and improve the air supply distance. By arranging the first groove 31 on the connecting seat 30 and arranging the fixing disc 211 to extend into the first groove 31, the connecting relationship between the connecting seat 30 and the fixing disc 211 is more stable, preventing the connecting seat 30 and the fixing disc 211 from relatively displacing due to stress, and at the same time, the fixing disc 211 is at least partially arranged in the first groove 31, and the first groove 31 also plays a role in accommodating and protecting the fixing disc 211.

[0049] Please refer to Figure 2 , Figure 3 and Figure 5 , further, the housing 112 comprises an outer cover 1123 and an inner cover 1124, at least part of the inner cover 1124 is arranged on the radial inner side of the outer cover 1123, and the plurality of connecting leaves 33 connect the inner cover 1124 and the connecting seat 30; the side of the fixing disc 211 comprises an arc segment 2111 and a straight segment 2112 connected with each other, the straight segment 2112 is provided with a first clamping piece 2113, the first groove 31 is provided with a first clamping groove 311 corresponding to the first clamping piece 2113, and the first clamping piece 2113 is clamped with the first clamping groove 311.

[0050] Understandably, since at least part of the inner cover 1124 is arranged on the radial inner side of the outer cover 1123, and the plurality of connecting leaves 33 connect the inner cover 1124 and the connecting seat 30, the above arrangement has the advantages of easy production and molding and easy assembly. Since the straight segment 2112 is provided with the first clamping piece 2113, the first groove 31 is provided with the first clamping groove 311 corresponding to the first clamping piece 2113, and the first clamping piece 2113 corresponds to the first clamping groove 311, which can make the connecting seat 30 and the fixing disc 211 more easily aligned during assembly, and the clamping relationship between the first clamping piece 2113 and the first clamping groove 311 also enables the fixing disc 211 and the connecting seat 30 to be firmly fixed, avoiding the relative sliding of the fixing disc 211 and the connecting seat 30 affecting the structural stability.

[0051] Please continue to refer to Figure 2 and Figure 3Further, the first clamping groove 311 is provided with a protruding part 312 near one end of the flat section 2112, and the protruding part 312 protrudes towards the flat section 2112.

[0052] It can be understood that the protruding part 312 protruding towards the flat section 2112 not only plays a role of clamping introduction, but also extends the clamping length of the first clamping groove 311. The longer clamping length increases the contact area between the first clamping groove 311 and the first clamping part 2113, so that the clamping relationship between the first clamping groove 311 and the first clamping part 2113 is more closely, and the stability of the connecting structure of the fixing disc 211 and the connecting seat 30 is improved.

[0053] Please refer to Figure 3 Further, one of the first groove 31 and the fixing disc 211 is provided with a limiting hole 2114, and the other is provided with a limiting part 313 corresponding to the limiting hole 2114, and the limiting hole 2114 and the limiting part 313 are connected in cooperation.

[0054] It can be understood that the limiting hole 2114 and the limiting part 313 are respectively arranged on the fixing disc 211 and the first groove 31, and the cooperation connection of the limiting hole 2114 and the limiting part 313 improves the transverse load bearing capacity, so that the connecting relationship between the fixing disc 211 and the connecting seat 30 is more stable.

[0055] Alternatively, as a specific embodiment, the limiting part 313 is arranged in the first groove 31, and the limiting hole 2114 is arranged on the fixing disc 211; as another specific embodiment, the limiting part 313 is arranged on the fixing disc 211, and the limiting hole 2114 is arranged in the first groove 31.

[0056] Please refer to Figures 2 to 4 Further, the fixing disc 211 and the connecting seat 30 are provided with corresponding screw holes 51, and the portable fan 1 further comprises a screw rod 50, and the screw rod 50 is screwed with the screw hole 51.

[0057] It can be understood that the screw rod 50 and the screw hole 51 are connected to connect the fixing disc 211 and the connecting seat 30, the connection mode of the screw rod 50 and the screw hole 51 is simple in structure, does not need complex assembly process, and is easy to disassemble and assemble, so that the assembly of the motor assembly 20 and the connecting seat 30 becomes simple and convenient; at the same time, the relative position of the fixing disc 211 and the connecting seat 30 can be accurately fixed, and the reliability and tightness of the connection are ensured.

[0058] Please refer to Figure 3 , Figure 4 and Figure 6Further, the surface ring of the boss 212 connected with the fixing disc 211 is provided with a second clamping part 2121, the inner surface ring of the fixing disc 211 connected with the boss 212 is provided with a corresponding third clamping part 2115, and the second clamping part 2121 and the third clamping part 2115 are matched and connected.

[0059] Understandably, since the boss 212 and the fixing disc 211 are matched and connected through the second clamping part 2121 and the third clamping part 2115, the contact area and the roughness of the contact surface of the boss 212 and the fixing disc 211 can be increased, so that the matched connection of the boss 212 and the fixing disc 211 is more compact, and in the environment of high-speed operation of the motor body 22, micro-motion wear caused by vibration conduction of the motor body 22 can be avoided, and the overall structural strength of the support 21 is improved.

[0060] Optionally, as a variant, the second clamping part 2121 and the third clamping part 2115 are integrally formed; as another variant, the second clamping part 2121 and the third clamping part 2115 are connected by bonding, screwing, welding or the like, which is not limited here.

[0061] Please refer to Figure 6 Further, the second clamping part 2121 is a key tooth 2122, the third clamping part 2115 is a key groove 2116, the number of the key tooth 2122 is two groups, the inner surface of the fixing disc 211 is further provided with two groups of blocking parts 2117, and the key tooth 2122 and the blocking part 2117 are sequentially abutted.

[0062] Understandably, by setting the number of the key tooth 2122 to two groups and setting the corresponding blocking part 2117 on the inner surface of the fixing disc 211, the number of the key tooth 2122 is set to two groups to increase the structural strength of the connection, and the key tooth 2122 and the blocking part 2117 are sequentially abutted to prevent the key tooth 2122 from being displaced in the axial direction relative to the key groove 2116, thereby ensuring the stability of the structure.

[0063] Please refer to Figure 2 , Figure 4 and Figure 7 Further, the fixing mechanism 221 includes a stator 2211, the rotating mechanism 222 includes a rotor magnetic ring 2221 and a rotating shaft 2222, the stator 2211 is fixedly sleeved on the boss 212, the rotor magnetic ring 2221 is annularly arranged outside the stator 2211, the rotating shaft 2222 is at least partially rotatably arranged in the boss 212, the fan 40 includes a rotating seat 41 and a blade 42, the blade 42 is arranged on the rotating seat 41, the rotor magnetic ring 2221 is fixedly connected with the rotating seat 41, and one end of the rotating shaft 2222 protrudes out of the boss 212 and is fixedly connected with the rotating seat 41.

[0064] It can be understood that the rotating shaft 2222 is at least partially rotatable through the boss 212, the boss 212 is hollow to provide a rotating space for the rotating shaft 2222, the rotating seat 41 is fixedly connected with the rotor magnetic ring 2221, one end of the rotating shaft 2222 is connected with the rotating seat 41, so that when the rotor magnetic ring 2221 arranged around the stator 2211 rotates, the rotating seat 41 and the blade 42 can be driven to rotate, thereby realizing the blowing function of accelerating air flow.

[0065] Please continue to combine Figure 2 、 Figure 4 and Figure 7 , further, the rotating seat 41 is provided with a second groove 411 on the side close to the motor body 22, the boss 212 extends into the second groove 411, the stator 2211 and the rotor magnetic ring 2221 are located in the second groove 411, the rotor magnetic ring 2221 is fixedly connected to the inner side wall of the second groove 411, and the end of the rotating shaft 2222 extending out of the boss 212 is fixedly connected to the inner bottom wall of the second groove 411.

[0066] It can be understood that by providing the second groove 411, the second groove 411 plays a role of protecting and containing the stator 2211 and the rotor magnetic ring 2221 and reducing noise, the rotor magnetic ring 2221 is fixedly connected to the inner side wall of the second groove 411, and the end of the rotating shaft 2222 extending out of the boss 212 is fixedly connected to the inner bottom wall of the second groove 411, so that the rotating seat 41, the rotor magnetic ring 2221 and the rotating shaft 2222 can realize same-direction rotation with high connection strength.

[0067] Please refer to Figure 7 , further, the second groove 411 further comprises a connecting portion 4111, the connecting portion 4111 is raised towards the boss 212, the connecting portion 4111 is provided with a connecting cavity 4112 corresponding to the rotating shaft 2222, and the end of the rotating shaft 2222 extending out of the boss 212 is inserted into the connecting cavity 4112.

[0068] It can be understood that since the connecting portion 4111 is raised towards the boss 212 and the connecting portion 4111 is provided with the connecting cavity 4112 corresponding to the rotating shaft 2222, the shape of the raised connecting portion 4111 can make the connecting cavity 4112 have a deeper cavity depth, thereby improving the connection strength of the rotating shaft 2222 inserted into the connecting cavity 4112 and realizing the close connection between the rotating seat 41 and the rotating shaft 2222.

[0069] Please continue to refer to Figure 7 , further, the motor assembly 20 further comprises a bearing 23, the bearing 23 is arranged at both ends of the boss 212, the rotating shaft 2222, the bearing 23 and the boss 212 are coaxially arranged in sequence, an elastic member 24 is sleeved on the rotating shaft 2222, one end of the elastic member 24 abuts against the second groove 411, and the other end of the elastic member 24 abuts against the bearing 23 towards the second groove 411.

[0070] It can be understood that the bearing 23 can reduce the friction when the rotating shaft 2222 rotates, reduce the energy consumption, improve the motor efficiency, and keep the stable rotation of the rotating shaft 2222 and reduce the vibration. The elastic member 24 is abutted to the rotating seat 41 and the bearing 23 at both ends, can rotate with the rotating seat 41 and the bearing 23, and can avoid the vibration of the rotating seat 41 in the axial direction by the elastic force, which helps to reduce the working noise and improve the user experience.

[0071] Optionally, as a specific embodiment, the elastic member 24 is a spring.

[0072] Please continue to refer to Figure 7 , further, a gap 60 is left between the connecting seat 30 and the rotating seat 41, the gap 60 is between 1mm to 3mm; the direction from the motor assembly 20 to the connecting seat 30 is the air outlet direction, the radial direction of the rotating seat 41 increases along the air outlet direction, and the maximum diameter of the rotating seat 41 is less than or equal to the maximum diameter of the connecting seat 30.

[0073] It can be understood that the gap 60 between the connecting seat 30 and the rotating seat 41 ensures that the rotating seat 41 keeps a certain safety distance from the connecting seat 30 during the working rotation, and the connecting seat 30 will not block the normal operation of the rotating seat 41; at the same time, the wind generated by the fan 40 can be smoothly sent to the connecting seat 30, reducing the loss of wind. The radial direction of the rotating seat 41 increases along the air outlet direction, and the maximum diameter of the rotating seat 41 is less than or equal to the maximum diameter of the connecting seat 30, which can appropriately increase the wind pressure and be beneficial to increase the air supply distance.

[0074] Please combine Figure 2 and Figure 5 , further, the stator 2211 includes a motor support 2212 and a winding 2214, the motor support 2212 is fixedly sleeved on the boss 212, the motor support 2212 is annularly provided with a plurality of winding portions 2213, and the winding 2214 is wound on the winding portions 2213.

[0075] It can be understood that when the current in the winding 2214 changes, a changing magnetic field is generated. Since the rotor magnetic ring 2221 is a permanent magnet, the rotating magnetic field of the stator 2211 interacts with the magnetic field of the rotor magnetic ring 2221 to generate a torque, so that the rotor magnetic ring 2221 rotates, and then drives the rotating seat 41 to rotate to realize blowing.

[0076] Please combine Figures 2 to 4 , further, the fixed disc 211 and the connecting seat 30 are provided with corresponding through holes 70, the connecting seat 30 is provided with a third groove 32 away from the fixed disc 211, the portable fan 1 further includes a circuit board 80 and a lead wire 81, the circuit board 80 is arranged in the third groove 32, the lead wire 81 passes through the through hole 70, and both ends of the lead wire 81 are connected with the circuit board 80 and the motor body 22 respectively.

[0077] It can be understood that the circuit board 80 can be responsible for realizing current commutation, switching the current in each phase of the motor by controlling the electronic elements on the circuit board 80, and controlling the speed and torque of the motor. The third groove 32 plays a role in accommodating and protecting the circuit board 80, and by opening the through hole 70 for the lead wire 81 to pass through, the lead wire 81 is connected to the circuit board 80 and the motor body 22 on both sides of the connecting seat 30. Of course, in other embodiments, the circuit board 80 can also be responsible for displaying one or more of the use state, power, wind speed, light, etc. of the portable fan.

[0078] Compared with the prior art, the portable fan of the utility model has the following advantages:

[0079] 1、The portable fan in an embodiment of the utility model includes a motor assembly and a connecting seat connected, the motor assembly includes a support and a motor body, the support includes a fixed disc and a boss arranged on the fixed disc, the fixed disc is connected with the connecting seat, and the motor body is coaxially arranged with the boss; the motor body includes a fixing mechanism and a rotating mechanism, the fixing mechanism is arranged on the boss, the rotating mechanism is rotationally connected with the fixing mechanism, the rotating mechanism is provided with a fan on the side away from the connecting seat, and the rotating mechanism is fixedly connected with the fan. Since the motor assembly includes the support and the motor body, the support and the motor body form an integral motor assembly, which is convenient for modular assembly; by arranging the support to include the fixed disc and the boss, the boss is used for connecting the motor body, and only the fixed disc needs to be connected with the connecting seat, so that the assembly of the motor assembly and the connecting seat can be realized. When the motor assembly works, the rotating mechanism drives the fan to rotate to provide wind power. Compared with the stator and the rotating shaft in the existing assembly structure, which are directly assembled with the connecting seat, the utility model adopts the integral motor assembly formed by the support and the motor body for assembly, thereby forming the advantage of modular assembly. The boss at one end of the support is used for connecting the motor body, which is conducive to forming the modular motor assembly, and the fixed disc at the other end is used for connecting with the connecting seat, so that the assembly of the motor assembly and the connecting seat is simple and efficient, the assembly efficiency and assembly yield can be improved, the setting of the support avoids the direct assembly of the stator and the rotating shaft with the connecting seat, reduces the negative influence of the assembly process on the stability of the assembled motor body, and improves the reliability of the portable fan in work.

[0080] 2、The portable fan in one embodiment of the utility model still includes a shell, the fan and the shell define an air inlet channel between them, the connecting seat and the shell define an air outlet channel between them, a plurality of connecting leaves are arranged between the connecting seat and the shell, the diameter of the connecting seat near one end of the motor assembly is less than or equal to the diameter of the connecting seat away from the motor assembly; a first groove is formed in the side of the connecting seat facing the motor assembly, and the fixing disc is at least partially arranged in the first groove. The connecting leaves play a role in guiding air, and the diameter of the connecting seat near one end of the motor assembly being less than or equal to the diameter of the connecting seat away from the motor assembly can play a role in pressurization, improving the air supply distance. By forming the first groove in the connecting seat and arranging the fixing disc to extend into the first groove, the connecting relationship between the connecting seat and the fixing disc is more stable, preventing the connecting seat and the fixing disc from relatively displacing due to stress, and at the same time, the fixing disc is at least partially arranged in the first groove, and the first groove also plays a role in accommodating and protecting the fixing disc.

[0081] 3、The shell in one embodiment of the utility model includes an outer cover and an inner cover, at least part of the inner cover is arranged on the radial inner side of the outer cover, and a plurality of connecting leaves connect the inner cover and the connecting seat; the side surface of the fixing disc includes an arc segment and a straight segment connected with each other, the straight segment is provided with a first clamping piece, the first groove is provided with a first clamping groove corresponding to the first clamping piece, and the first clamping piece is clamped with the first clamping groove. Since at least part of the inner cover is arranged on the radial inner side of the outer cover, and a plurality of connecting leaves connect the inner cover and the connecting seat, the above arrangement has the advantages of being easy to produce and form and facilitating assembly. Since the straight segment is provided with the first clamping piece, the first groove is provided with the first clamping groove corresponding to the first clamping piece, and the first clamping piece corresponds to the first clamping groove, which can make the connecting seat and the fixing disc more easily aligned during assembly, and at the same time, the clamping relationship between the first clamping piece and the first clamping groove can also make the fixing disc and the connecting seat firmly fixed, avoiding relative sliding of the fixing disc and the connecting seat to affect the structural stability.

[0082] 4、The surface of the boss connected with the fixing disc is annularly provided with a second clamping piece, the inner surface of the fixing disc connected with the boss is annularly provided with a corresponding third clamping piece, and the second clamping piece and the third clamping piece are connected in cooperation. Since the boss and the fixing disc are connected in cooperation through the second clamping piece and the third clamping piece, the contact area and the roughness of the contact surface of the boss and the fixing disc can be increased, the boss and the fixing disc are more closely connected in cooperation, and in the environment of high-speed operation of the motor body, micro-motion wear caused by vibration conduction of the motor body can be avoided, and the structural strength of the whole support is improved.

[0083] 5. In one embodiment of this utility model, the fixing mechanism includes a stator, and the rotating mechanism includes a rotor magnetic ring and a rotating shaft. The stator is fixedly sleeved on the boss, the rotor magnetic ring is arranged around the stator, and the rotating shaft is at least partially rotatably inserted into the boss. The fan includes a rotating seat and blades, the blades are arranged on the rotating seat, the rotor magnetic ring is fixedly connected to the rotating seat, and one end of the rotating shaft extends out of the boss and is fixedly connected to the rotating seat. Because the rotating seat is fixedly connected to the rotor magnetic ring, and one end of the rotating shaft is connected to the rotating seat, when the rotor magnetic ring arranged around the stator rotates, it can drive the rotating seat and the blades to rotate, thereby achieving the blowing function of accelerating airflow.

[0084] 6. In one embodiment of this utility model, a second groove is provided on the side of the rotating base near the motor body. A boss extends into the second groove, and the stator and rotor magnetic rings are located within the second groove. The rotor magnetic ring is fixedly connected to the inner wall of the second groove, and one end of the rotating shaft extending out of the boss is fixedly connected to the inner bottom wall of the second groove. By providing the second groove, the second groove protects and accommodates the stator and rotor magnetic rings and reduces noise. The rotor magnetic ring is fixedly connected to the inner wall of the second groove, and the end of the rotating shaft extending out of the boss is fixedly connected to the inner bottom wall of the second groove, enabling the rotating base, rotor magnetic ring, and rotating shaft to rotate in the same direction with a high connection strength.

[0085] 7. In one embodiment of this utility model, the second groove further includes a connecting portion, which protrudes towards the boss and has a connecting cavity corresponding to the rotating shaft. One end of the rotating shaft extending out of the boss is inserted into the connecting cavity. Because the connecting portion protrudes towards the boss and has a connecting cavity corresponding to the rotating shaft, the protruding shape of the connecting portion allows the connecting cavity to have a deeper cavity depth, improving the connection strength of the rotating shaft inserted into the connecting cavity and achieving a tight connection between the rotating seat and the rotating shaft.

[0086] 8. In one embodiment of this utility model, the motor assembly further includes bearings, which are disposed at both ends of the boss. The rotating shaft, bearings, and boss are coaxially arranged in sequence. An elastic element is sleeved on the rotating shaft, with one end of the elastic element abutting against the second groove and the other end abutting against the bearing facing the second groove. The bearing can reduce the friction during the rotation of the rotating shaft, reduce energy consumption, and improve motor efficiency; it also maintains the stable rotation of the rotating shaft and reduces vibration. The two ends of the elastic element abut against the rotating seat and the bearing respectively, and can rotate together with the rotating seat and the bearing. The elastic element can prevent the rotating seat from vibrating in the axial direction with its elastic force, which helps to reduce operating noise and improve the user experience.

[0087] 9、The gap between the connecting seat and the rotating seat in one embodiment of the utility model leaves a gap, and the gap is between 1mm to 3mm; the direction from the motor assembly to the connecting seat is the air outlet direction, the radial direction of the rotating seat increases along the air outlet direction, and the maximum diameter of the rotating seat is less than or equal to the maximum diameter of the connecting seat. The gap between the connecting seat and the rotating seat ensures that the rotating seat maintains a certain safety distance from the connecting seat during the working rotation process, and the connecting seat does not block the normal operation of the rotating seat; at the same time, the wind generated by the fan can be smoothly sent forward to the connecting seat, reducing the loss of wind. The radial direction of the rotating seat increases along the air outlet direction, and the maximum diameter of the rotating seat is less than or equal to the maximum diameter of the connecting seat, which can appropriately increase the wind pressure and is beneficial to increasing the air supply distance.

[0088] 10、The fixed disc and the connecting seat in one embodiment of the utility model are provided with corresponding through holes, the connecting seat is provided with a third groove away from the fixed disc, the portable fan further comprises a circuit board and a wire, the circuit board is arranged in the third groove, the wire passes through the through hole, and the two ends of the wire are connected with the circuit board and the motor body respectively. The circuit board can be responsible for realizing current commutation, switching the current in each phase of the motor by controlling the electronic elements on the circuit board; and controlling and adjusting the speed and torque of the motor. The third groove plays a containing and protecting role on the circuit board, and the through hole for the wire to pass through is arranged, so as to facilitate the wire to connect the circuit board and the motor body on both sides of the connecting seat.

[0089] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A portable fan with rear end air inlet and front end air outlet, comprising a motor assembly and a connecting base connected together, the motor assembly comprising a support and a motor body, the support comprising a fixing disc and a boss arranged on the fixing disc, the fixing disc being connected with the connecting base, and the motor body being coaxially arranged on the boss; the motor body comprising a fixing mechanism arranged on the boss and a rotating mechanism rotatably connected with the fixing mechanism, the rotating mechanism being provided with a fan on a side away from the connecting base and fixedly connected with the fan.

2. The portable fan of claim 1, wherein: The portable fan further comprises a shell, an air inlet channel being defined between the fan and the shell, and an air outlet channel being defined between the connecting base and the shell, a plurality of connecting leaves being arranged between the connecting base and the shell, a diameter of the connecting base near the motor assembly being less than or equal to a diameter of the connecting base away from the motor assembly, a first groove being formed on a side of the connecting base facing the motor assembly, and the fixing disc being at least partially arranged in the first groove.

3. The portable fan of claim 2, wherein: The shell comprises an outer shell and an inner shell, at least a part of the inner shell being arranged on a radially inner side of the outer shell, and the plurality of connecting leaves connecting the inner shell and the connecting base; a side surface of the fixing disc comprising an arc segment and a straight segment connected together, the straight segment being provided with a first clamping member, the first groove being provided with a first clamping groove corresponding to the first clamping member, and the first clamping member being clamped with the first clamping groove.

4. The portable fan of claim 1, wherein: A surface of the boss connected with the fixing disc is annularly provided with a second clamping member, an inner surface of the fixing disc connected with the boss is annularly provided with a corresponding third clamping member, and the second clamping member and the third clamping member are connected in cooperation.

5. The portable fan of claim 1, wherein: The fixing mechanism comprises a stator, the rotating mechanism comprises a rotor magnetic ring and a rotating shaft, the stator is fixedly sleeved on the boss, the rotor magnetic ring is annularly arranged outside the stator, the rotating shaft is at least partially rotatably arranged in the boss, the fan comprises a rotating seat and a blade, the blade is arranged on the rotating seat, the rotor magnetic ring is fixedly connected with the rotating seat, and one end of the rotating shaft protruding out of the boss is fixedly connected with the rotating seat.

6. The portable fan of claim 5, wherein: The rotating seat is provided with a second groove on a side near the motor body, the boss protrudes into the second groove, the stator and the rotor magnetic ring are located in the second groove, the rotor magnetic ring is fixedly connected to an inner side wall of the second groove, and one end of the rotating shaft protruding out of the boss is fixedly connected to an inner bottom wall of the second groove.

7. The portable fan of claim 6, wherein: The second groove further comprises a connecting portion, the connecting portion protrudes towards the boss, the connecting portion is provided with a connecting cavity corresponding to the rotating shaft, and one end of the rotating shaft protruding out of the boss is inserted into the connecting cavity.

8. The portable fan of claim 7, wherein: The motor assembly further comprises a bearing, the bearing is arranged at both ends of the boss, the rotating shaft, the bearing and the boss are coaxially arranged in sequence, an elastic member is sleeved on the rotating shaft, one end of the elastic member abuts against the second groove, and the other end of the elastic member abuts against the bearing facing the second groove.

9. The portable fan of claim 5, wherein: The gap between the connecting seat and the rotating seat is between 1mm and 3mm; the direction from the motor assembly to the connecting seat is an air outlet direction, the radial direction of the rotating seat increases along the air outlet direction, and the maximum diameter of the rotating seat is less than or equal to the maximum diameter of the connecting seat.

10. The portable fan of claim 1, wherein: The fixing disc and the connecting seat are provided with corresponding through holes, the connecting seat is provided with a third groove away from the fixing disc, the portable fan further comprises a circuit board and a wire, the circuit board is arranged in the third groove, and the wire passes through the through hole and is connected to the circuit board and the motor body at two ends.

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