Hand-held oscillating fan

Abstract

The utility model provides a handheld oscillating fan which comprises a fan body and a supporting unit suitable for supporting the fan body, the fan body comprises a main shell, a fan assembly and a driving motor, the fan assembly and the driving motor are arranged in the main shell, the driving motor comprises a motor shaft, the main shell comprises a shaft sleeve, and the supporting unit comprises a first rotating seat. The first rotating seat comprises a rotating shaft, the motor shaft is connected with the first rotating seat, a bearing is arranged between the rotating shaft and the shaft sleeve, and the motor is suitable for driving the fan body to rotate relative to the supporting unit. By improving the matching mode between the bearing and the rotating shaft as well as between the bearing and the shaft sleeve, the fan is kept stable in the oscillating rotation process, the shaking and blocking phenomena are reduced, and the use safety and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan technical field, especially relate to a handheld head shaking fan. BACKGROUND

[0002] In the past handheld head shaking fan structure, the connecting rotation part of fan main body and support unit adopts the hard link mode of direct contact and friction of glue piece. This connecting mode will cause the serious wearing of glue piece due to the continuous friction in the long time use. With the aggravation of wearing, the matching precision between rotating parts is reduced, and then the jamming phenomenon appears, which not only affects the fluency of fan head shaking, but also can cause the increase of motor load and shorten the service life of motor. In addition, in the running process of head shaking fan, the continuous work of driving motor will produce a large amount of heat. If the heat cannot be dissipated in time, the temperature of motor will be too high, and then the working efficiency and service life of motor are affected, and the motor failure can be caused in serious case. SUMMARY

[0003] In view of the defects of the prior art, the utility model aims at providing a handheld head shaking fan to meet the needs of users.

[0004] To achieve the above object, the utility model provides a handheld head shaking fan, which comprises a fan main body and a support unit suitable for supporting the fan main body, the fan main body comprises a main shell, a fan assembly arranged in the main shell and a driving motor, the driving motor comprises a motor shaft, the main shell comprises a shaft sleeve, the support unit comprises a first rotating seat, the first rotating seat comprises a rotating shaft, the motor shaft is connected with the first rotating seat, a bearing is arranged between the rotating shaft and the shaft sleeve, and the motor is suitable for driving the fan main body to rotate relative to the support unit.

[0005] As preferred, the bearing comprises an inner ring and an outer ring which can rotate relative to each other, the inner ring is tightly matched with the bearing, and the outer ring is tightly matched with the shaft sleeve.

[0006] Further, a plurality of first convex ridges are arranged on the outer periphery of the rotating shaft, the first convex ridges are tightly matched with the inner ring, a plurality of second convex ridges are arranged on the inner periphery of the shaft sleeve, the second convex ridges are tightly matched with the outer ring, and the first convex ridges and the second convex ridges are arranged in parallel to the axial direction of the rotating shaft / the motor shaft. The close and accurate matching mode greatly enhances the stability of the fan main body during rotation, and effectively reduces the shaking and jamming phenomenon.

[0007] As preferred: the first rotating seat comprises a sub-housing and a rotation limiting piece fixedly assembled to the sub-housing, the rotation limiting piece comprises a first range slot, the main housing comprises a first range column adapted to extend into the first range slot, and the first range column can be relatively rotated within the first range slot within a limited range. By designing a reasonable rotation limiting structure, the rotating angle of the fan main body can be accurately limited, the diversified needs of users for the air supply angle in different scenarios can be met, and the adjustment of the rotating angle is more convenient and accurate.

[0008] As preferred: when the fan main body and the support unit are in the initial position, the first range column is located at the center of the first range slot, and the first range slot is an arc-shaped slot with an arc angle of to .

[0009] As preferred: the rotation limiting piece comprises a rotation limiting plate, the rotation limiting plate comprises two symmetrically arranged first range slots. The rotation limiting plate is arranged inside the main housing, the rotation limiting plate is fixedly assembled to the sub-housing through a mounting column, the main housing comprises a second range slot, and the two ends of the mounting column pass through the second range slot. When the fan main body and the support unit are in the initial position, the mounting column is located at the center of the second range slot, and the arc angle of the second range slot is not less than the arc angle of the first range slot.

[0010] As preferred: the rotation limiting piece comprises the rotating shaft formed by extending downward from the center of the rotation limiting plate, the main housing comprises a shaft hole for the rotating shaft to extend out and a shaft sleeve formed by extending downward from the center of the bottom surface of the main housing, the sub-housing comprises a shaft seat adapted to tightly connect the motor shaft, the rotating shaft and the motor shaft are coaxially arranged, and the rotating shaft is fixedly connected or interference-fitted with the shaft seat.

[0011] As preferred: the main housing forms a main cavity, the fan assembly comprises a fan housing and a fan, the fan is arranged in the fan cavity, the motor is arranged below the fan assembly, the main housing comprises a first air inlet arranged at the top end thereof, a second air inlet arranged at the bottom end thereof, and an air outlet arranged at the front side surface thereof, and the fan housing forms a fan cavity adapted to communicate with the air inlets and the air outlet, respectively.

[0012] As preferred: the sub-housing is adapted to cover the second air inlet, the sub-housing is in the shape of a circular truncated cone, and the sub-housing forms a plurality of third air inlets adapted to communicate with the second air inlet.

[0013] As preferred: the radial dimension of the rotation limiting plate is not less than half of the radial dimension of the secondary housing, effectively balancing the force caused by the change of the gravity center of the fan body during the head-shaking rotation of the fan body relative to the support unit, ensuring the stability of the overall structure of the fan and reducing the shaking phenomenon caused by the gravity center problem

[0014] As preferred: the support unit comprises a second rotating seat and a support leg pivotally connected to the second rotating seat to form a tripod, and the first rotating seat and the second rotating seat are detachably connected by screwing around a screw shaft, so that the fan has the function of being convenient to carry under the premise of ensuring the stability of support, and the user can move and use the fan in different places. The screw shaft is adapted to pass through the center of the fan body and the center of the support unit at the same time, at least part of the support leg is of a flexible structure, and the support leg can be converged to form a handle structure for holding. At the same time, the spherical support head and the bendable metal inner core make the support leg better fit various uneven support surfaces, further enhancing the stability of support.

[0015] As preferred: the first rotating seat comprises a first locking part, the second rotating seat comprises a first screwing part, the first screwing part is screwed and clamped with the first locking part, and then the fan body and the support unit are locked along the circumference of the screw shaft.

[0016] The first rotating seat comprises a second screwing part, the second rotating seat comprises a second locking part, the second screwing part is screwed and abuts against the second locking part, and then the fan body and the support unit are locked along the axial direction of the screw shaft. This double locking structure ensures that the connection between the fan body and the support unit is stable and reliable during use of the fan, and even when subjected to external impact or movement, the fan body and the support unit will not be loose or separated, ensuring the safety of the fan in use.

[0017] As preferred: the main housing further forms a limiting groove, the edge of the secondary housing is adapted to extend into the limiting groove, and the edge of the secondary housing can rotate in the limiting groove, reducing the disturbance of airflow to the secondary housing, and also preventing dust and impurities from entering the main cavity through the gap between the secondary housing and the main housing.

[0018] The beneficial effects of the utility model are:

[0019] I. By optimizing the connection structure of the fan body and the support unit, especially improving the matching mode between the bearing and the shaft sleeve, the stability of the fan during the head-shaking rotation is ensured, the shaking and jamming phenomenon is reduced, and the safety and reliability of use are improved.

[0020] The rotation limiting piece of the first rotating seat is provided with a first range-limiting groove, and the first range-limiting column of the main shell extends into the first range-limiting groove to limit the relative rotation, and the first range-limiting column is located in the center of the first range-limiting groove at the initial position, and the first range-limiting groove is an arc-shaped groove with a specific radian, which can accurately limit the rotation angle range of the fan body. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure schematic view of the handheld oscillating fan is provided.

[0022] Figure 2 A structure schematic view of the handheld oscillating fan is provided.

[0023] Figure 3 An explosion schematic view of the fan body is provided.

[0024] Figure 4 An explosion schematic view of the supporting unit is provided.

[0025] Figure 5 A structure schematic view of the lower shell is provided.

[0026] Figure 6 A lower view of the cooperation between the lower shell and the rotation limiting piece is provided.

[0027] Figure 7 A structure schematic view of the first rotating seat is provided.

[0028] Figure 8 A structure schematic view of the first rotating seat is provided.

[0029] Figure 9 A structure schematic view of the second rotating seat is provided.

[0030] Figure 10 A top view of the second rotating seat is provided.

[0031] Fan body 1, main shell 11, main cavity 111, upper shell 112, first air inlet 1121, lower shell 113, second air inlet 1131, shaft hole 1132, shaft sleeve 1133, second convex ridge 1134, first range column 1135, second range slot 1136, limiting slot 1137, air outlet 114, fan assembly 12, fan shell 121, fan cavity 122, fan 123, driving motor 13, motor shaft 131, bearing 14, support unit 2, first rotating seat 3, auxiliary shell 31, third air inlet 311, screw sleeve 32, first locking part 321, limiting groove 3211, first stop surface 3212, second stop surface 3213, second synaptic 322, end plate 33, second screw cylinder 34, second screw part 341, shaft seat 35, rotation limiting piece 36, rotation limiting plate 361, first range slot 3611, first synaptic 3612, rotating shaft 362, first convex ridge 3621, mounting column 37, second rotating seat 4, screw seat 41, first screw part 411, movable gap 412, first mounting notch 4111, first matching surface 4112, first screw slot 4113, limiting protrusion 4114, second matching surface 4115, screw plate 42, second locking part 421, second mounting area 422, support arc surface 423, avoiding notch 424, supporting leg 5, main pipe body 51, pivoting head 52, support head 53, metal inner core 511, sheath 512. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is described in detail below with the help of the drawings and specific embodiments.

[0033] Here, it also needs to be explained that, in order to avoid the fact that the utility model is obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme of the utility model are shown in the drawings, and other details not closely related to the utility model are omitted.

[0034] In addition, it also needs to be explained that the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0035] As Figures 1-10The portable fan comprises a fan body 1 and a supporting unit 2 adapted to support the fan body 1. The fan body 1 comprises a main casing 11, a fan assembly 12 arranged in the main casing 11 and a driving motor 13. The main casing 11 comprises an upper casing 112 and a lower casing 113 which are assembled together. The supporting unit 2 comprises a first rotating seat 3, a second rotating seat 4 and three supporting legs 5. The first rotating seat 3 is connected to the main casing 11. The first rotating seat 3 and the second rotating seat 4 are adapted to be detachably screwed around a screwing shaft which is adapted to pass through the center of the fan body 1 and the center of the supporting unit 2 at the same time. The fan has the function of being convenient to carry under the premise of ensuring the stability of support, and is convenient for users to move and use in different places. The supporting leg 5 comprises a main pipe body 51 and a pivoting head 52 and a supporting head 53 arranged at both ends of the main pipe body 51. The pivoting head 52 is pivoted to the second rotating seat 4 to form a tripod. The supporting head 53 is spherical. The main pipe body 51 comprises a bendable metal inner core 511 and a sheath 512 adapted to cover the metal inner core 511. The supporting leg 5 can be folded to form a handle structure which can be held. The spherical supporting head 53 and the bendable metal inner core 511 enable the supporting leg 5 to better fit various uneven support surfaces, further enhancing the stability of support.

[0036] The first rotating seat 3 comprises a secondary casing 31, a screwing sleeve 32 arranged inside the secondary casing 31, an end plate 33 arranged at one end of the screwing sleeve 32, a second screwing cylinder 34 extending downward from the center of the end plate 33, an axle seat 35 formed by extending upward from the center of the end plate 33, and a rotation limiting piece 36. The rotation limiting piece 36 comprises a rotation limiting plate 361 and a rotating shaft 362 extending downward from the center of the rotation limiting plate 361. The rotation limiting plate 361 is arranged inside the main casing 11 and is fixedly assembled above the end plate 33 through a mounting column 37. The lower casing 113 comprises an axle hole 1132 for the rotating shaft 362 to extend out, and the rotating shaft 362 is in interference fit with the axle seat 35. The driving motor 13 comprises a motor shaft 131 which is tightly connected to the axle seat 35, and the rotating shaft 362 is coaxially arranged with the motor shaft 131. The bottom surface of the lower casing 113 extends downward to form an axle sleeve 1133, and a bearing 14 is arranged between the rotating shaft 362 and the axle sleeve 1133. The driving motor 13 is adapted to drive the fan body 1 to rotate relative to the supporting unit 2.

[0037] Further, the bearing 14 comprises an inner ring and an outer ring which can rotate relative to each other. The outer periphery of the rotating shaft 362 is provided with a plurality of first convex ribs 3621 which are tightly fitted with the inner ring. The inner periphery of the axle sleeve 1133 is provided with a plurality of second convex ribs 1134 which are tightly fitted with the outer ring. The first convex ribs 3621 and the second convex ribs 1134 are arranged parallel to the axial direction of the rotating shaft 362 / motor shaft 131. The close and precise fitting mode greatly enhances the stability of the fan body 1 when rotating, effectively reducing the shaking and jamming phenomenon.

[0038] In the embodiment, the rotation limiting plate 361 comprises two symmetrically arranged first limiting grooves 3611, which are arc grooves with an arc of The lower shell 113 comprises a first limiting column 1135 adapted to extend into the first limiting groove 3611 and a second limiting groove 1136 adapted to pass through the mounting column 37, the arc of the second limiting groove 1136 being equal to the arc of the first limiting groove 3611. When the fan body 1 and the support unit 2 are in the initial position, the first limiting column 1135 is located in the center of the first limiting groove 3611, and the mounting column 37 is located in the center of the second limiting groove. By designing a reasonable rotation limiting structure, the rotation angle of the fan body 1 can be accurately limited, meeting the diversified needs of users for the blowing angle in different scenarios, and making the adjustment of the rotation angle more convenient and accurate.

[0039] In the embodiment, the main shell 11 forms a main cavity 111, the fan assembly 12 comprises a fan shell 121 and a fan 123, the fan 123 is arranged in a fan cavity 122, the motor is arranged below the fan assembly 12, the upper shell 112 comprises a first air inlet 1121 arranged at the top end thereof, the lower shell 113 comprises a second air inlet 1131 arranged at the bottom end thereof, the upper shell 112 and the lower shell 113 form an air outlet 114 arranged at the front side thereof, and the fan shell 121 forms the fan cavity 122 adapted to communicate with the air inlets and the air outlet 114, respectively. The auxiliary shell 31 is adapted to cover the second air inlet 1131, the auxiliary shell 31 is in the shape of a circular truncated cone, and the auxiliary shell 31 forms a plurality of third air inlets 311 adapted to communicate with the second air inlet 1131. A battery (not shown in the figure) adapted to function for the fan 123 and the driving motor is also arranged in the main cavity 111.

[0040] The radial dimension of the rotation limiting plate 361 is not less than half of the radial dimension of the auxiliary shell 31, and during the head-shaking rotation of the fan body 1 relative to the support unit 2, the effective force generated by the change of the center of gravity of the fan body 1 is balanced, ensuring the stability of the overall structure of the fan and reducing the shaking phenomenon caused by the center of gravity.

[0041] Further, the rotation limiting plate 361 comprises a plurality of first synapses 3612 extending downward, the lower shell 113 is adapted to support the first synapses 3612, the rotation sleeve 32 comprises a plurality of second synapses 322 extending upward, and the second synapses 322 are adapted to support the lower shell 113. The existence of the first synapses 3612 and the second synapses 322 forms a mutually related support network among the rotation limiting plate 361, the main shell 11 and the first rotating seat 3, enhances the integrity of the entire fan shell part, makes the cooperative work among the components more stable and reliable, and reduces the possibility of component damage caused by excessive local stress.

[0042] In the embodiment, the lower shell 113 is further formed with a limiting groove 1137 on the side facing the first rotating seat 3, and the edge of the auxiliary shell 31 is adapted to extend into the limiting groove 1137 and rotate in the limiting groove 1137, so as to reduce the disturbance of air flow to the auxiliary shell 31.

[0043] In the embodiment, the screw sleeve 32 is coaxially arranged on the periphery of the second screw cylinder 34. The inner periphery of the screw sleeve 32 is circumferentially provided with a plurality of first locking portions 321, and any two adjacent first locking portions 321 have a first mounting area therebetween. The second rotating seat 4 comprises a screw seat 41 and a screw plate 42 which are assembled as a whole. The outer periphery of the screw seat 41 is circumferentially provided with a plurality of first screw portions 411, and the first screw portions 411 are adapted to be rotated to be clamped with the first locking portions 321 after being aligned with the first mounting area. The outer periphery of the second screw cylinder 34 is circumferentially provided with a plurality of second screw portions 341, and the number of the first screw portions 411 is the same as that of the second screw portions 341. The screw plate 42 rotates synchronously with the screw seat 41, and the screw plate 42 is arranged perpendicularly to the screw shaft. The screw plate 42 is formed with second locking portions 421 and second mounting areas 422 between any two adjacent second locking portions 421, and the second screw portions 341 are adapted to be rotated to be clamped with the second locking portions 421 after being aligned with the second mounting areas 422. The double locking structure ensures that the connection between the fan body 1 and the support unit 2 is stable and reliable during use of the fan, and even when subjected to external force impact or movement, the connection will not be loose or separated, thereby ensuring the use safety of the fan.

[0044] In the embodiment, the first locking part 321 comprises a limiting groove 3211 and first and second stop faces 3212 and 3213 arranged at two circumferential ends thereof. The first screwing part 411 is an arc-shaped plate, and a first screwing cylinder is formed by the first screwing part 411. The first screwing part 411 has a movable gap 412 between two adjacent first screwing parts 411. The first screwing part 411 has a first mounting gap 4111 formed at one end thereof, and the first mounting gap 4111 comprises a first matching face 4112. The first screwing part 411 has a first screwing groove 4113 formed at one end thereof, and the first screwing groove 4113 comprises a limiting protrusion 4114 and a second matching face 4115. The limiting protrusion 4114 is arranged along the radial direction of the screwing axis. The outer circumferential wall of the screwing plate 42 comprises uniformly spaced support arc faces 423 and avoiding gaps 424. The support arc faces 423 are adapted to abut against the inner circumferential wall of the first screwing block. The avoiding gaps 424 are arranged corresponding to the limiting grooves 1137 to provide deformation space for the limiting grooves 1137. When the first screwing part 411 is aligned with the first mounting area, the first locking part 321 enters the first mounting gap 4111, and the first stop face 3212 abuts against the first matching face 4112. When the first screwing part 411 is screwed with the first locking part 321, the first locking part 321 slides into the first screwing groove 4113 of the adjacent first screwing part 411 through the first mounting gap 4111. The limiting protrusion 4114 is clamped with the limiting groove 3211, and the second stop face 3213 abuts against the second stop face 3213 to prompt screwing in place.

[0045] In the embodiment, the first and second rotating seats 3 and 4 respectively comprise indication marks. When the two indication marks are aligned, it is prompted that the installation is in place.

[0046] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A hand-held oscillating fan, comprising a fan body and a supporting unit adapted to support the fan body, characterized in that, the fan body comprises a main housing, a fan assembly arranged in the main housing, and a driving motor, the driving motor comprises a motor shaft, the main housing comprises a shaft sleeve, the supporting unit comprises a first rotating seat, the first rotating seat comprises a rotating shaft, the motor shaft is connected with the first rotating seat, and a bearing is arranged between the rotating shaft and the shaft sleeve, the motor is adapted to drive the fan body to rotate relative to the supporting unit.

2. A hand-held oscillating fan as claimed in claim 1, wherein, the bearing comprises an inner ring and an outer ring which are relatively rotatable, the inner ring is tightly fitted with the bearing, and the outer ring is tightly fitted with the shaft sleeve.

3. A hand-held oscillating fan as claimed in claim 2, wherein, the first rotating seat comprises a secondary housing and a rotation limiting piece fixedly assembled to the secondary housing, the rotation limiting piece comprises a first range slot, the main housing comprises a first range column adapted to extend into the first range slot, and the first range column can be relatively rotated within the first range slot within a limited range.

4. A hand-held oscillating fan as claimed in claim 3, wherein When the fan body and the support unit are in the initial position, the first range column is located in the center of the first range slot, and the first range slot is an arc-shaped slot with an arc between and .

5. A hand-held oscillating fan as claimed in claim 4, wherein, the rotation limiting piece comprises a rotation limiting plate, the rotation limiting plate comprises two symmetrically arranged first range slots; the rotation limiting plate is arranged inside the main housing, the rotation limiting plate is fixedly assembled to the secondary housing through a mounting column, the main housing comprises a second range slot, and two ends of the mounting column pass through the second range slot; when the fan body and the supporting unit are in an initial position, the mounting column is located in the center of the second range slot, and the curvature of the second range slot is not less than the curvature of the first range slot.

6. A hand-held oscillating fan as claimed in claim 5, wherein, the rotation limiting piece comprises the rotating shaft which is formed by extending downward from the center of the rotation limiting plate, the main housing comprises a shaft hole for the rotating shaft to extend out and the shaft sleeve which is formed by extending downward from the center of the bottom surface of the main housing, the secondary housing comprises a shaft seat adapted to tightly connect the motor shaft, the rotating shaft is coaxially arranged with the motor shaft, and the rotating shaft is fixedly connected or interference-fitted with the shaft seat.

7. A hand-held oscillating fan as defined in claim 3 wherein, the main housing is formed with a main cavity, the fan assembly comprises a fan housing and a fan, the fan is arranged in the fan cavity, the motor is arranged below the fan assembly, the main housing comprises a first air inlet arranged at the top end thereof, a second air inlet arranged at the bottom end thereof, and an air outlet arranged at the front side surface thereof, and the fan housing is formed with a fan cavity adapted to communicate with the air inlets and the air outlet respectively.

8. A hand-held oscillating fan as defined in claim 7 wherein, the secondary housing is adapted to cover the second air inlet, the secondary housing is in the shape of a circular truncated cone, and the secondary housing is formed with a plurality of third air inlets adapted to communicate with the second air inlet.

9. The hand-held oscillating fan of claim 1 wherein, the supporting unit comprises a second rotating seat and legs which are pivotally connected to the second rotating seat to form a tripod, the first rotating seat and the second rotating seat are detachably and rotatably connected around a screw shaft, the screw shaft is adapted to pass through the center of the fan body and the center of the supporting unit at the same time, at least part of the legs are in a flexible structure, and the legs can be converged to form a handle structure which can be held. 10.A hand-held oscillating fan according to claim 9, characterized in that, The first rotating seat comprises a first locking part, the second rotating seat comprises a first screwing part, the first screwing part and the first locking part are screwed and clamped, and then the fan body and the support unit are locked along the circumferential direction of the screwing shaft; The first rotating seat comprises a second screwing part, the second rotating seat comprises a second locking part, the second screwing part and the second locking part are screwed and abutted, and then the fan body and the support unit are locked along the axial direction of the screwing shaft.

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