A foldable handheld fan

Abstract

The utility model provides a kind of foldable handheld fan, including fan unit, handle and rotating support.Handle extends along length direction, and inside has accommodating cavity.Rotating support one end is connected with fan unit, and the other end is rotatably connected with handle through hinging structure.In handheld mode, define a minimum circumscribed cuboid space defined by fan unit and handle together.Rotating support at least a part is overlapped with handle in length direction, to shorten the combined span of fan unit and handle in length direction.At least a part of hinging structure is offset outside accommodating cavity in thickness direction, and simultaneously located in minimum circumscribed cuboid space.The utility model realizes rotating support and handle length overlap and hinging structure convex by rotating support rear shift offset, under the premise of keeping compact appearance, effectively shorten handheld overall length and release handle internal space.

Description

Technical Field

[0001] This utility model belongs to the field of handheld fan technology, and in particular relates to a foldable handheld fan. Background Technology

[0002] Foldable handheld fans are widely used in daily life due to their ease of storage and portability. A typical foldable handheld fan includes a fan unit, a handle, and a rotating mechanism connecting the two. The fan unit rotates relative to the handle via a rotating bracket about a rotation axis parallel to the width of the handle, thus switching between an unfolded handheld form and a folded form for storage.

[0003] In existing designs, to simplify the mold structure and assembly process, the rotation axis is typically positioned at the top center of the handle, intersecting with the central axis extending along the handle's length. While this symmetrical, centered layout facilitates the integral molding of the shaft seat and the handle housing, it suffers from the following inherent drawbacks:

[0004] First, because the rotation axis is located at the top of the handle, the rotation bracket extends almost entirely above the handle in the handheld position, resulting in a large span between the fan unit and the handle in the length direction, making it difficult to further compress the overall length of the product.

[0005] Secondly, to accommodate the centrally located pivot structure, a large internal space is required for the handle. This directly encroaches on the internal volume that could have been used to house the battery or circuit board, leading to a shortage of internal space when pursuing a compact design. Increasing the handle size to meet the internal space requirements would contradict the trend of product miniaturization. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a foldable handheld fan to meet the needs of users.

[0007] To achieve the above objectives, this utility model provides a foldable handheld fan, including a fan unit, a handle, and a rotating bracket. The length direction of the handle is defined as a first direction, the width direction of the handle is defined as a second direction, and the thickness direction of the handle is defined as a third direction.

[0008] The handle has a receiving cavity inside, and a control circuit board is disposed inside the receiving cavity. The control circuit board is arranged perpendicular to the first direction.

[0009] The rotating bracket includes an offset connecting section and a pivot connected to the end of the offset connecting section. One end of the offset connecting section is connected to the fan unit. A pivot seat is provided on the back of the handle. The pivot and the pivot seat are rotatably engaged around the rotation axis so that the fan unit can rotate relative to the handle between a handheld mode and a folded mode.

[0010] The rotation axis is perpendicular to the first direction, the handle has a central axis extending along the first direction, and the rotation axis is offset upward from the central axis of the handle in the third direction.

[0011] In the handheld configuration, the offset connecting segment extends along the first direction and is positioned opposite to the back of the handle, so that at least a portion of the rotating bracket overlaps with the handle in the first direction; at least a portion of the rotating bracket protrudes outward from the back of the handle in the third direction, and a minimum circumscribed cuboid space defined by the fan unit and the handle is defined, within which the rotating bracket is located.

[0012] Preferably, the minimum circumscribed cuboid space includes a first side arranged along a first direction, a second side arranged along a second direction, and a third side arranged along a third direction, wherein:

[0013] The length of the first side is equal to the maximum combined span of the fan unit and the handle in the first direction;

[0014] The second direction and the third direction are adapted to define a first reference plane, the projection of the handle on the first reference plane falls completely within the projection of the fan unit on the first reference plane, the length of the second side is equal to the width of the fan unit, and the length of the third side is equal to the thickness of the fan unit, thus clarifying that the product's shape boundary is dominated by the fan unit, providing a clear accommodating boundary for the offset rotating bracket.

[0015] Preferably, the first direction and the third direction are adapted to define a second reference plane, with the outline of the back of the handle at the location where the pivot is not located serving as the boundary of the handle's projection in the second reference plane. The projection of the rotating bracket in the second reference plane overlaps with the projection of the handle in the second reference plane, wherein: the length of the overlapping area is not less than 75% of the projected length of the rotating bracket in the second reference plane, ensuring that the rotating bracket has sufficient overlap with the handle in the first direction (length direction) to achieve a significant shortening effect; the width of the overlapping area does not exceed 50% of the projected width of the rotating bracket in the second reference plane; and the outward convexity in the third direction (thickness direction) is reasonably constrained, ensuring structural stability and aesthetic harmony. It is understood that although the pivot (including the first and second axle seats) is physically part of the handle, when defining the offset of the rotating bracket relative to the handle body, to accurately reflect its contribution to the release of internal space, the pivot is considered an additional structure protruding beyond the handle body's outline and is not included in the calculation of the handle's reference back outline. This definition method aims to objectively quantify the offset ratio of the rotating bracket, not to redefine the structural attribution.

[0016] Preferably, the handle includes a front shell, a back shell, and a mating component independent of the front and back shells. The front and back shells interlock to define the receiving cavity. The pivot includes a first bearing disposed on the mating component and a second bearing disposed on the back shell. The mating component is fixedly connected to the back shell, so that the first and second bearings are assembled to form the bearing, ensuring the manufacturability and assembly feasibility of the bearing structure. The mating component, as an independent part, can be molded separately and then fixed to the back shell, avoiding a complex one-piece molding structure.

[0017] Preferably, part of the control circuit board and the pivot are overlapped in the first direction, and the control circuit board is tangential to the lower surface of the pivot, thereby realizing the spatial reuse of the control circuit board and the pivoting mechanism in the first direction.

[0018] Preferably, the inner side of the front shell is provided with a first clamping groove, and the inner side of the back shell is provided with a second clamping groove. The opening of the first clamping groove and the opening of the second clamping groove are arranged opposite to each other. The front edge of the control circuit board is inserted into the first clamping groove along the third direction, and the rear edge of the control circuit board is inserted into the second clamping groove along the third direction. During the fastening process of the front shell and the back shell, the control circuit board is automatically clamped and positioned without the need for additional fasteners, which simplifies the assembly process.

[0019] Preferably, the mating component further includes at least one positioning ear, and the face shell and the back shell together form a positioning hole, and the positioning ear is clamped and positioned in the positioning hole.

[0020] Preferably, the mating component is provided with a spring-loaded buckle, and the offset connecting section is provided with a protruding structure on the side facing the mating component. The spring-loaded buckle engages or releases with the protruding structure through elastic deformation, thereby providing a locking position when the fan unit is switched to handheld mode. This not only prevents the fan unit from accidentally disengaging from the handheld mode, but also improves the user's operating experience by generating clear resistance feedback during rotation.

[0021] Preferably, a display is also provided inside the receiving cavity. The display is electrically connected to the control circuit board and is disposed above the control circuit board. The faceplate has a viewing area, and the display is visible to the outside through the viewing area.

[0022] Preferably, the handle includes two side plates clamped and fixed between the front shell and the back shell, and the control circuit board is also electrically connected to a charging interface and a control switch, the charging interface and the control switch being respectively embedded in the two side plates.

[0023] The beneficial effects of this utility model are:

[0024] By confining the rotating bracket within the minimum circumscribed cuboid space, the offset and convex rotating bracket does not exceed the overall shape boundary of the product. This means that without increasing the overall size of the product, the rotation axis is offset from the handle's central axis in the thickness direction (i.e., the third direction), and the rotating bracket is designed as a partially convex structure opposite to the back of the handle. This achieves overlap between the rotating bracket and the handle in the length direction, shortening the combined span of the fan unit and the handle, while also transferring part of the pivot mechanism's volume to the outside of the handle. This frees up valuable internal space, making it possible to accommodate larger capacity batteries or more complex circuits, or to further reduce the handle's size while maintaining the same functionality. Furthermore, the coordinated design of the control circuit board perpendicular to the first direction minimizes the handle's size requirements in the first direction, resulting in a more compact overall structure. Attached Figure Description

[0025] Figure 1 This is a structural diagram of a foldable handheld fan provided by the present invention.

[0026] Figure 2 This is a cross-sectional schematic diagram of a foldable handheld fan provided by this utility model.

[0027] Figure 3 A schematic diagram of the fan unit provided by this utility model.

[0028] Figure 4 An exploded view of the handle provided by this utility model.

[0029] Figure 5 This is an assembly diagram of the control circuit board, mating parts, and back cover provided by this utility model.

[0030] Figure 6 A schematic diagram of the structure of the face shell provided by this utility model.

[0031] Figure 7 A schematic diagram of the back shell provided by this utility model.

[0032] Figure 8 A schematic diagram of the structure of the mating component provided by this utility model.

[0033] Figure 9 This is a schematic diagram showing the overlap between the projection of the rotating bracket in the second reference plane and the projection area of ​​the back of the handle reference plane.

[0034] In the diagram: 10. Fan unit; 11. Fan blade; 12. Motor; 13. Fan housing; 20. Handle; 21. Receiving cavity; 22. Front shell; 221. First clamping groove; 222. Third stud hole; 223. First half hole; 224. Visible area; 225. Visible shell; 23. Back shell; 231. Second clamping groove; 232. Second stud hole; 233. Second half hole; 241. First bearing seat; 242. Second bearing seat; 25. Side plate; 26. Mating part; 261. First stud hole; 262. Fourth stud hole; 263. Positioning ear; 264. Spring clip; 30. Rotating bracket; 31. Offset connecting section; 311. Protruding structure; 32. Pivot; 321. Damping ring; 40. Control circuit board; 41. Charging interface; 42. Control switch; 43. Display; 50. Battery. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0037] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] like Figures 1 to 9 As shown, a foldable handheld fan includes a fan unit 10, a handle 20, and a rotating bracket 30. For ease of description, a virtual three-dimensional coordinate system is established: the length direction of the handle 20 is defined as the first direction X, the width direction of the handle 20 as the second direction Y, and the thickness direction of the handle 20 as the third direction Z. The fan unit 10 includes a fan housing 13, fan blades 11 installed inside the fan housing 13, and a motor 12. The motor 12 is adapted to drive the fan blades 11 to rotate about a rotation axis L1. The handle 20 has a receiving cavity 21 for accommodating functional components. The handle 20 includes a front shell 22, a back shell 23, and two side plates. The front shell 22 and the back shell 23 interlock and clamp the side plates along the third direction Z, thereby jointly defining the receiving cavity 21. The front shell 22 constitutes the front of the handle 20, and the back shell 23 constitutes the back of the handle 20. The handle 20 has a central axis M extending along the first direction X. The rotating bracket 30 is used to connect the fan unit 10 and the handle 20 and realize relative rotation between the two. The rotating bracket 30 includes an offset connecting section 31 and a pivot 32 connected to the end of the offset connecting section 31. The fan housing 13 is cylindrical in shape with the rotation axis L1 as its center. One end (free end) of the offset connecting section 31 is fixedly connected to the lower rear section of the fan housing 13 of the fan unit 10. The pivot 32 is provided at the other end (pivot end) of the offset connecting section 31. A pivot seat is provided on the back of the handle 20 (i.e., the outer side of the back shell 23). The pivot 32 and the pivot seat rotate around the rotation axis L2, thereby allowing the fan unit 10 to rotate relative to the handle 20 between a handheld mode and a folded mode. The rotation axis L2 is parallel to the second direction Y, i.e., perpendicular to the first direction X. The rotation axis L2 is offset away from the central axis M of the handle 20 on the side facing the back of the handle 20 (i.e., the side where the back shell 23 is located) in the third direction Z, and the two do not intersect.

[0039] In the handheld configuration, the rotation axis L1 is set parallel to the third direction Z, and the offset connecting segment 31 extends along the first direction X and is positioned opposite the back of the handle 20 (i.e., the outer surface of the back cover 23). This arrangement causes a portion of the rotating bracket 30 (i.e., a portion of the offset connecting segment 31) to overlap with the handle 20 in the first direction X. Simultaneously, at least a portion of the rotating bracket 30 (i.e., at least the lower portion of the offset connecting segment 31) protrudes outward from the back of the handle 20 in the third direction Z (excluding the protruding portion of the pivot), i.e., it has a partially convex shape relative to the main body back profile of the handle 20. Although the rotating bracket 30 partially protrudes outward from the back of the handle 20, in the handheld configuration, a minimum circumscribed cuboid space S0 (e.g., defined by the fan unit 10 and the handle 20) is defined. Figure 1 (As shown in the dashed box), the rotating bracket 30 remains entirely within the minimum circumscribed cuboid space S0, not exceeding the overall outer boundary of the product. When the fan unit 10 rotates 90 degrees backward around the rotation axis L2 from its handheld form, the foldable handheld fan enters its folded form. In the folded form, the rotation axis L1 of the fan unit 10 changes from being parallel to the third direction Z to being parallel to the first direction X. At this time, the fan unit 10 is close to the back of the handle 20, minimizing the overall length and maximizing the width of the product.

[0040] Reference Figure 3 and Figure 4 The minimum circumscribed cuboid space S0 includes a first side Lx along the first direction X, a second side Ly along the second direction Y, and a third side Lz along the third direction Z. The length of the first side Lx is equal to the maximum combined span of the fan unit 10 and the handle 20 in the first direction X, i.e., the distance from the frontmost point (air outlet) of the fan unit 10 to the bottommost point of the handle 20. The second direction Y and the third direction Z together define a first reference plane (i.e., the YZ plane). In the handheld configuration, the projection of the handle 20 onto this first reference plane falls entirely within the projection of the fan unit 10 onto this first reference plane. In other words, the dimension of the fan unit 10 in the width direction (second direction Y) is greater than the width dimension of the handle 20, and the handle 20 does not exceed the lateral contour of the fan unit 10 in the width direction; similarly, the dimension of the fan unit 10 in the thickness direction (third direction Z) is greater than the thickness dimension of the handle 20, and the handle 20 does not exceed the front and rear contours of the fan unit 10 in the thickness direction. Therefore, the length of the second side Ly is equal to the width dimension W_fan of the fan unit 10, and the length of the third side Lz is equal to the thickness dimension T_fan of the fan unit 10. This dimensional relationship ensures that the product shape is dominated by the fan unit 10, providing a clear accommodating boundary for the offset rotating bracket 30.

[0041] Furthermore, the first direction X and the third direction Z jointly define a second reference plane (i.e., the XZ plane). The outline of the outer surface of the back shell 23 of the handle 20 at the location where the pivot is not provided serves as the boundary of the projection of the handle 20 into the second reference plane. That is, the partially protruding area occupied by the pivot (especially the protruding first shaft seat 241) is not included in the projection range of the handle 20. On this second reference plane, the projection of the rotating bracket 30 and the projection of the handle 20 have an overlapping area. Figure 9 In the diagram, region A represents the projected outline of the rotating bracket on the second reference plane, region B represents the projected area defined by the projection boundary of the handle reference back side, shaded region C represents the overlapping area, H1 represents the length of the overlapping area in the first direction, and W1 represents the width of the overlapping area in the third direction. The length H1 of the overlapping area in the first direction X (i.e., the coincident length of the rotating bracket 30 and the handle 20 in the length direction) is not less than 75% of the total length H0 of the rotating bracket 30 projected in the first direction X, and preferably 90% in this embodiment. This high proportion of overlap ensures the significant effect of dimensional compression in the length direction. At the same time, the width W1 of the overlapping area in the third direction Z (i.e., the coincident width of the rotating bracket 30 and the handle 20 in the thickness direction) is 50% of the total width W0 of the rotating bracket 30 projected in the third direction Z. That is, with respect to the back outline of the main body of the handle 20 (i.e., the outer wall surface of the receiving cavity 21), about half of the thickness of the rotating bracket 30 is embedded within the outline and overlaps with the main body of the handle, while the other half of the thickness protrudes outside the outline. This degree of offset ensures the connection strength between the rotating bracket 30 and the handle body, while also allowing half of the volume of the pivot to be externally placed, thereby freeing up the internal storage space of the handle 20.

[0042] In this embodiment, the handle 20 includes a mating component 26 independent of the front shell 22 and the back shell 23. The mating component 26 is integrally injection molded from plastic. The pivot is composed of a separate first bearing 241 and a second bearing 242. The second bearing 242 is integrally formed on the outer side of the back shell 23; the first bearing 241 is disposed on the mating component 26. The mating component 26 is fixedly connected to the back shell 23 by screws, so that the first bearing 241 and the second bearing 242 are mated and assembled to form a pivot for supporting the pivot 32. After the first bearing 241 and the second bearing 242 are mated, a shaft hole parallel to the second direction Y is defined, and the pivot 32 is rotatably inserted into the shaft hole. Further, a damping ring 321 is sleeved on the pivot 32 (see Figure 3The damping ring 321 is made of an elastic material, such as rubber or silicone. An interference fit is formed between the outer circumferential surface of the damping ring 321 and the inner surface of the shaft hole, thereby generating a stable frictional force when the pivot 32 rotates relative to the shaft hole. With the damping ring 321, the fan unit 10 can be stably suspended in a handheld mode, a folded mode, or any intermediate position in between, satisfying the user's flexible adjustment needs for the fan's airflow angle in different usage scenarios.

[0043] The mating part 26 is fixed as follows: The mating part 26 has two first stud holes 261, and the back cover 23 has a corresponding second stud hole 232. A screw passes through the first stud hole 261 and locks into the second stud hole 232, reliably fixing the mating part 26 to the back cover 23. Furthermore, the front cover 22 has a third stud hole 222, and the mating part 26 has a corresponding fourth stud hole 262. During assembly, a screw passes through the third stud hole 222 and locks into the fourth stud hole 262, thereby fixing the front cover 22 and the mating part 26 together.

[0044] Furthermore, the mating part 26 also includes two positioning ears 263 disposed at its upper end, each positioning ear 263 extending out of the handle 20. Correspondingly, the top edge of the front cover 22 is provided with a first semi-hole 223, and the top edge of the back cover 23 is provided with a second semi-hole 233. When the front cover 22 and the back cover 23 are fastened together, the first semi-hole 223 and the second semi-hole 233 align, together forming a complete positioning hole. The positioning ears 263 are clamped and positioned within this positioning hole. In the handheld mode, the positioning ears 263 are located precisely between the top of the handle 20 and the fan unit 10.

[0045] In this embodiment, the rotation axis L2 is offset from the central axis M of the handle 20 in the third direction Z, and the offset connecting section 31 is connected to the rear half of the fan housing 13 (i.e., the side away from the air outlet), causing the center of gravity of the overall assembly consisting of the fan unit 10 and the rotating bracket 30 to shift backward relative to the rotation axis L2. This shift in the center of gravity causes the fan unit 10 to naturally have a tendency to flip backward around the rotation axis L2 and detach from the handheld position when in the handheld position (i.e., the gravitational torque tends to cause the fan unit 10 to fall backward). In this embodiment, the mating part 26 is provided with an integrally formed spring buckle 264. The spring buckle 264 has an elastic cantilever extending inward toward the handle 20, which can elastically deform along the third direction Z under the action of external force. Correspondingly, the side of the offset connecting section 31 facing the mating part 26 is provided with a protruding structure 311, the number of which can be determined according to the number of locking positions required. In this embodiment, one protruding structure 311 corresponding to the locking position in the handheld position is provided. When the fan unit 10 rotates to the end position of the handheld mode, the protruding structure 311 moves with the offset connecting section 31 to a position opposite to the spring clip 264. The protruding structure 311 presses the spring clip 264, causing it to elastically deform inward toward the handle 20. After the protruding structure 311 passes the top of the spring clip 264, the spring clip 264, under its own elastic restoring force, forms a locking interference with the side wall of the protruding structure 311. This locking interference provides the fan unit 10 with a holding torque opposite to the aforementioned gravitational torque, thereby effectively counteracting the tendency to detach due to the rearward shift of the center of gravity, reliably locking the fan unit 10 in the handheld mode and preventing it from accidentally detaching. When the user needs to switch the fan unit 10 from the handheld mode to the folding mode, only a rotational torque sufficient to overcome the elastic holding force of the spring clip 264 needs to be applied. The protruding structure 311 can then press the spring clip 264, causing it to elastically deform inward toward the handle 20, releasing the locking interference, and allowing the fan unit 10 to continue rotating.

[0046] In this embodiment, a battery 50 and a control circuit board 40 are disposed within the receiving cavity 21 of the handle 20. To achieve dimensional compression of the handle 20 in the first direction X, the control circuit board 40 is positioned perpendicular to the first direction X, i.e., the plane containing the control circuit board 40 is parallel to the first reference plane (YZ plane). A first clamping groove 221 is provided on the inner wall surface of the front shell 22, and a second clamping groove 231 is provided on the inner wall surface of the back shell 23. The openings of the first clamping groove 221 and the second clamping groove 231 face each other along the third direction Z. During assembly, the front edge of the control circuit board 40 is inserted into the first clamping groove 221 along the third direction Z, and the rear edge of the control circuit board 40 is inserted into the second clamping groove 231 along the third direction Z. When the front shell 22 and the back shell 23 are fastened together along the third direction Z, the control circuit board 40 is automatically clamped and fixed by the two clamping grooves without the need for additional screws or clips, simplifying the assembly process and ensuring the precise positioning of the circuit board within the receiving cavity 21. The rear edge of the control circuit board 40 extends directly below the pivot. Part of the control circuit board 40 overlaps with the pivot in the first direction X, and the upper surface of the control circuit board 40 is substantially tangent to the lower surface of the pivot. This space reuse design allows the overall length of the handle 20 to be further shortened while maintaining the same functional configuration, or a larger capacity battery unit can be accommodated within the same length.

[0047] In this embodiment, a display 43 is also provided within the receiving cavity 21. The display 43 is electrically connected to the control circuit board 40 and is positioned above the control circuit board 40. The display 43 is used to display operating status information such as battery level and fan speed. A viewing area 224 is provided on the front cover 22 corresponding to the position of the display 43. The display 43 is visible to the outside through this viewing area 224. In this embodiment, the viewing area 224 is recessed, meaning its bottom surface is lower than the outer surface of the front cover 22. A viewing shell 225 is installed within the viewing area 224. The viewing shell 225 is made of transparent or semi-transparent material, and its outer surface smoothly transitions to the outer surface of the front cover 22, forming an integrated appearance. Furthermore, one end of the stud where the aforementioned third stud hole 222 is located extends and protrudes from the bottom surface of the viewing area 224. After the viewing shell 225 is installed, the protruding end of the stud is covered by the viewing shell 225, ensuring a clean and aesthetically pleasing product appearance. During assembly, the screw can be installed first through the visible area 224, and then the visible shell 225 can be fastened to complete the final assembly.

[0048] In this embodiment, the control circuit board 40 is also electrically connected to a charging interface 41 and a control switch 42. The charging interface 41 is embedded in one side panel 25 and can be, but is not limited to, a USB interface or a Type-C interface. The control switch 42 is embedded in the other side panel 25 and can be, but is not limited to, a button or a dial switch. The circuit pins of the charging interface 41 and the control switch 42 are respectively connected to corresponding pads on the control circuit board 40 via flexible circuit boards or wires. The side panels are connected to the front shell 22 and the back shell 23 via insert-type snap-fit ​​fasteners. Specifically, the edge of the side panel 25 is provided with multiple outwardly extending elastic inserts, and the corresponding edges of the front shell 22 and the back shell 23 are provided with slots that mate with the inserts. During assembly, the inserts of the side panels are inserted into the corresponding slots to achieve quick snap-fit ​​fixation without the need for screws, simplifying the assembly process and maintaining a clean appearance.

[0049] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A foldable handheld fan, characterized in that, It includes a fan unit, a handle, and a rotating bracket. The length direction of the handle is defined as a first direction, the width direction of the handle is defined as a second direction, and the thickness direction of the handle is defined as a third direction. The handle has a receiving cavity inside, and a control circuit board is disposed inside the receiving cavity. The control circuit board is arranged perpendicular to the first direction. The rotating bracket includes an offset connecting section and a pivot connected to the end of the offset connecting section. One end of the offset connecting section is connected to the fan unit. A pivot seat is provided on the back of the handle. The pivot and the pivot seat are rotatably engaged around the rotation axis so that the fan unit can rotate relative to the handle between a handheld mode and a folded mode. The rotation axis is perpendicular to the first direction, the handle has a central axis extending along the first direction, and the rotation axis is offset upward from the central axis of the handle in the third direction. In the handheld configuration, the offset connecting segment extends along the first direction and is positioned opposite to the back of the handle, so that at least a portion of the rotating bracket overlaps with the handle in the first direction; at least a portion of the rotating bracket protrudes outward from the back of the handle in the third direction, and a minimum circumscribed cuboid space defined by the fan unit and the handle is defined, within which the rotating bracket is located.

2. The foldable handheld fan according to claim 1, characterized in that, The minimum circumscribed cuboid space includes a first side along a first direction, a second side along a second direction, and a third side along a third direction, wherein: The length of the first side is equal to the maximum combined span of the fan unit and the handle in the first direction; The second direction and the third direction are adapted to define a first reference plane, the projection of the handle on the first reference plane completely falls within the projection of the fan unit on the first reference plane, the length of the second side is equal to the width of the fan unit, and the length of the third side is equal to the thickness of the fan unit.

3. The foldable handheld fan according to claim 2, characterized in that, The first direction and the third direction are adapted to define a second reference plane, with the outline of the back of the handle at the location where the pivot is not set as the boundary of the handle's projection in the second reference plane. The projection of the rotating bracket in the second reference plane and the projection of the handle in the second reference plane have an overlapping area, wherein: the length of the overlapping area is not less than 75% of the projection length of the rotating bracket in the second reference plane, and the width of the overlapping area does not exceed 50% of the projection width of the rotating bracket in the second reference plane.

4. The foldable handheld fan according to claim 2, characterized in that, The handle includes a front shell, a back shell, and a mating member independent of the front shell and the back shell. The front shell and the back shell are interlocked to define the receiving cavity. The pivot includes a first bearing disposed on the mating member and a second bearing disposed on the back shell. The mating member is fixedly connected to the back shell so that the first bearing and the second bearing are assembled to form the pivot.

5. The foldable handheld fan according to claim 4, characterized in that, Part of the control circuit board is disposed overlapping the pivot in the first direction, and the control circuit board is disposed tangentially to the lower surface of the pivot.

6. The foldable handheld fan according to claim 5, characterized in that, The inner side of the front shell is provided with a first clamping groove, and the inner side of the back shell is provided with a second clamping groove. The opening of the first clamping groove and the opening of the second clamping groove are arranged opposite to each other. The front edge of the control circuit board is inserted into the first clamping groove along the third direction, and the rear edge of the control circuit board is inserted into the second clamping groove along the third direction.

7. The foldable handheld fan according to claim 4, characterized in that, The mating component also includes at least one positioning ear, and the front shell and the back shell together form a positioning hole, and the positioning ear is clamped and positioned in the positioning hole.

8. The foldable handheld fan according to claim 4, characterized in that, The mating component is provided with a spring-loaded buckle, and the offset connecting section is provided with a protruding structure on the side facing the mating component. The spring-loaded buckle engages or releases with the protruding structure through elastic deformation, thereby providing a locking position when the fan unit is switched to handheld mode.

9. The foldable handheld fan according to claim 4, characterized in that, The cavity also houses a display, which is electrically connected to and positioned above the control circuit board. The housing has a viewing area through which the display is visible to the outside.

10. The foldable handheld fan according to claim 4, characterized in that, The handle includes two side plates that are clamped and fixed between the front shell and the back shell. The control circuit board is also electrically connected to a charging interface and a control switch, which are respectively embedded in the two side plates.

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