A folding fan

Abstract

The present invention provides a folding fan, comprising a fan head, a flip frame, a telescopic rod and a base, wherein a mesh cover is provided at the front end of the fan head, the fan head can be rotated left and right through a rotating assembly and is arranged on the top of the flip frame, the bottom of the flip frame is limited and flipped through a first limit rotation mechanism and is arranged on the top of the telescopic rod, the bottom of the telescopic rod is limited and flipped through a lockable rotation mechanism and is arranged on the rear end of the base, and the middle part of the flip frame is bent toward the front end and is provided with a first folding angle to avoid the rotation of the fan head; when folding, the fan head is rotated to the first folding angle through the rotating assembly, the telescopic rod is contracted and the lockable rotation mechanism is unlocked to make the telescopic rod flip forward and overlap on the base, the flip frame flips backward through the first limit rotation mechanism and makes the mesh cover of the fan head overlap on the telescopic rod. The folding fan has a simple and reasonable structure, a stable and high strength folding structure, is easy to assemble and store, has a good user experience, saves more storage space, can further save packaging materials and is easy to transport.

Description

Technical Field

[0001] The invention relates to the technical field of blowers, in particular to a folding fan. Background Art

[0002] At present, some household electric fans with large air outlet areas are large in size, which is not conducive to packaging and transportation. The components are often disassembled during transportation to reduce the packaging volume, and users need to reassemble them when using them. In addition, fans are household appliances used seasonally. When the weather turns cold, the disassembly and storage process is cumbersome and it is easy to cause parts to be lost. They need to be reassembled when used next time, which is time-consuming and labor-intensive, thus causing great inconvenience to users.

[0003] Existing fans that save space by simply folding through a folding mechanism are often only applicable to small fans because their folding mechanisms are not strong enough. When used on large fans, they cannot bear the weight of the fan head, resulting in insufficient stability of the fan head and causing failures. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a large folding fan with a simple structure, high strength, easy and fast assembly and storage process, and convenient transportation.

[0005] The present invention achieves the above object by:

[0006] A folding fan comprises a fan head, a flip frame, a telescopic rod and a base, wherein a mesh cover is provided at the front end of the fan head, the fan head is arranged on the top of the flip frame and can be rotated left and right by a rotating assembly, the bottom of the flip frame is arranged on the top of the telescopic rod and can be rotated by a first limit rotation mechanism, the bottom of the telescopic rod is arranged on the rear end of the base and can be rotated by a lockable rotation mechanism, and the middle part of the flip frame is bent toward the front end to form a first folding angle to avoid the rotation of the fan head; when folding, the fan head is rotated to the first folding angle by the rotating assembly, the telescopic rod is contracted and the lockable rotation mechanism is unlocked to make the telescopic rod flip forward and overlap on the base, the flip frame flips backward by the first limit rotation mechanism and makes the mesh cover of the fan head overlap on the telescopic rod.

[0007] Among them, the rotating assembly includes a rotating seat, a motor, a driving gear and a fixed gear. The fan head is installed on the rotating seat. The bottom of the rotating seat is provided with a fixed gear that rotates through a rotating column. The bottom of the fixed gear is provided with an insertion cylinder. The top of the flip frame is provided with an insertion hole. The insertion cylinder is tightly embedded in the insertion hole. The rotating seat is provided with a motor. The output shaft of the motor is drivingly connected to a driving gear that is meshed with the fixed gear.

[0008] Among them, the rotating seat is provided with a reduction gear that rotates between the driving gear and the fixed gear. The reduction gear includes a large tooth portion meshing with the driving gear at the top and a small tooth portion meshing with the fixed gear at the bottom. The diameter of the large tooth portion is larger than the diameter of the driving gear, and the diameter of the small tooth portion is smaller than the diameter of the fixed gear.

[0009] Among them, the rotating assembly also includes a rotation limiting mechanism for limiting the rotation angle of the rotating seat to -60°~180°, and the rotation limiting mechanism includes a rotating block arranged at the front end of the rotating column, a first limiting block arranged in the fixed gear and cooperating with the rotating block to limit the rotation of the rotating seat to an angle of -60°, and a second limiting block cooperating with the rotating block to limit the rotation of the rotating seat to an angle of 180°.

[0010] Among them, the rotating column is integrally formed with a wire-passing shaft, the bottom of which passes through the insertion cylinder and connects the top of the rotating seat and the inside of the flip frame. The bottom of the wire-passing shaft is concavely provided with a groove, and a clamping ring with the top surface abutting the bottom surface of the insertion cylinder is clamped in the groove.

[0011] Among them, the first limited rotation mechanism includes a first hinge column, a support arm, a limiting groove and a first hinge shaft, the first hinge column is connected to the top rear end of the telescopic rod, the first hinge shaft is fixed to the first hinge column by bolts, and a support arm is extended from the bottom of the flip frame toward the rear end, the end of the support arm is sleeved on the first hinge shaft and the bottom surface of the support arm rotates to abut the top of the telescopic rod, and the bottom of the support arm is corresponding to the position of the first hinge column. A limiting groove for accommodating the first hinge column is also provided, and the bottom of the groove rotates to abut the front end surface of the first hinge column.

[0012] Wherein, the lockable rotation mechanism includes a second limited rotation mechanism and a locking mechanism, the second limited rotation mechanism includes a second hinge column, a hinge bottom cover and a second hinge shaft, the second hinge column is connected to the rear end of the base, the hinge bottom cover is plugged and connected to the bottom of the telescopic rod and its front end is recessed with a hinge groove for accommodating the second hinge column, the second hinge shaft is penetrated in the hinge bottom cover and the second hinge column on both sides of the hinge groove, and the bottom of the hinge bottom cover rotates to abut against the top surface of the base; the locking mechanism includes a T-shaped locking bolt and a locking nut, the T-shaped locking bolt is rotatably arranged at the rear end of the bottom of the base and its locking end passes through the base from bottom to top, the rear end of the bottom of the base is recessed with an avoidance groove forming a rotation space for the torsion end of the T-shaped locking bolt, the locking nut is arranged at a position in the hinge bottom cover corresponding to the locking end of the T-shaped locking bolt, and the bottom of the hinge bottom cover is provided with a locking hole for the locking end to pass through and be screwed and connected to the locking bolt.

[0013] In which, the telescopic rod includes an upper tube, a lower tube and a telescopic locking mechanism, the upper tube is slidably connected to the lower tube, the telescopic locking mechanism includes a locking sleeve, a locking button, a button spring and a limiting sleeve, the locking sleeve is inserted into the bottom of the upper tube and its bottom radially protrudes outward to abut against the inner wall of the lower tube, one side of the locking sleeve is provided with a button groove, the position of the upper tube corresponding to the button groove is provided with a guide hole, the locking button is slidably arranged in the button groove and the guide hole, the button spring abuts between the bottom of the locking button and the bottom of the button groove and makes the top of the sliding button abut against the inner wall of the lower tube, the top of the lower tube corresponding to the guide hole is provided with a locking hole that matches and exposes the top of the sliding button, the limiting sleeve is connected to the top of the lower tube and its top radially protrudes inward to abut against the outer wall of the upper tube.

[0014] The locking sleeve is installed in the bottom of the upper tube and its bottom is radially outwardly protruding from the bottom to form a limiting convex portion which abuts against the inner wall of the lower tube.

[0015] Among them, the bottom of the rotating seat is connected to a bottom cover surrounding the driving gear, the fixed gear and the top of the reduction gear, the bottom cover is respectively provided with a first rotating shaft and a second rotating shaft at positions corresponding to the axial holes of the driving gear and the reduction gear, and the bottom cover is provided with an opening for avoiding the insertion cylinder at a position corresponding to the reduction insertion cylinder.

[0016] Beneficial effects of the present invention:

[0017] The folding fan of the present invention has a simple and reasonable structure, is easy to assemble, and is easy to store and store when the seasons change. It is convenient for users to use, reduces the cumbersome assembly process, is simple and quick to operate, and has a good user experience. When the folding fan of the present invention is assembled and used, the first limit rotation mechanism cooperates with the lockable rotation mechanism to respectively limit the fan head and the flip frame part at the top of the telescopic rod from continuing to flip downward due to their own weight, and the telescopic rod is flipped toward the front end of the base due to the weight of the fan head and the flip frame, thereby preventing the folding structure of the existing folding fan from being easily over-flipped due to the excessive weight of the fan head part and flipping out of the normal use state. The problem of turning angle is solved by providing sufficient structural positioning strength and strong supporting force. In conjunction with the first folding angle of the middle part of the flip frame bent forward, the center of gravity of the fan head is located at the center of the base, effectively avoiding the problem of the telescopic rod and the flip frame flipping excessively or not flipping properly during assembly and use, which may cause the fan head to run unstably. When folding, the rotating component rotates in conjunction with the first folding angle, so that the mesh cover of the folded fan head is stacked on top of the telescopic rod. Compared with the existing folding fan, the fan head mesh cover faces upwards and the back of the fan head is stacked on the telescopic rod after folding. The folded state is more stable, saves more storage space, further saves packaging materials and is easy to transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 is a schematic diagram of the three-dimensional structure of the present invention in a fully folded state;

[0021] Figure 3 It is a schematic diagram of the exploded structure of the fan head and the turning frame connection part of the present invention;

[0022] Figure 4 It is a cross-sectional structural schematic diagram of the fan head and the turning frame connection part of the present invention;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the rotating seat of the present invention;

[0024] Figure 6 is a schematic diagram of the three-dimensional structure of the fixed gear of the present invention;

[0025] Figure 7 It is a schematic diagram of the exploded structure of the first embodiment of the connection part between the telescopic rod and the base of the present invention;

[0026] Figure 8 It is a schematic diagram of the exploded structure of the second embodiment of the connection part between the telescopic rod and the base of the present invention;

[0027] Fig. 9is a cross-sectional structural schematic diagram of a telescopic rod part of Embodiment 1 of the present invention;

[0028] Fig.10 It is a cross-sectional structural schematic diagram of the telescopic rod part of the second embodiment of the present invention.

[0029] In the above figure, 1, fan head, 2, flip frame, 201, first folding angle, 202, plug-in hole, 203, clamping rib, 204, support arm, 205, limit slot, 3, telescopic rod, 301, upper tube, 3011, guide hole, 3012, locking slot, 3013, guide slope, 3014, first hinge column, 302, lower tube, 3021, locking hole, 303, hinged bottom cover, 3031, hinge slot, 4, base, 401, second hinge column, 5, rotating seat, 501, rotating column, 502, rotating block, 503, buckle, 6, motor, 601, output shaft, 7, driving gear, 8, fixed gear, 801, plug-in cylinder, 802, anti-skid rib, 803, first limit block, 804, second limit block, 9, rear shell, 1 0. Passing shaft, 1001. Slot, 11. Snap ring, 12. Reduction gear, 1201. Large tooth portion, 1202. Small tooth portion, 13. Locking sleeve, 1301. Button slot, 1302. Limiting convex portion, 14. Locking button, 15. Button spring, 16. Limiting sleeve, 1601. Limiting ring portion, 17. Horizontal sliding cavity, 18. Locking slider, 1801. Locking cavity, 1802. Toggle block, 19. Slider spring, 20. Locking block, 21. Block spring, 22. First hinge axis, 23. Second hinge axis, 24. T-type locking bolt, 2401. Locking end, 25. Locking nut, 26. Bottom cover, 2601. First rotating shaft, 2602. Second rotating shaft, 2603. Opening, 2604. Buckle edge, 27. Net cover. DETAILED DESCRIPTION

[0030] like Figures 1 to 4As shown, a folding fan comprises a fan head 1, a flip frame 2, a telescopic rod 3 and a base 4, wherein a mesh cover 27 is provided at the front end of the fan head 1, the fan head 1 is arranged on the top of the flip frame 2 and can be rotated left and right by a rotating assembly, the bottom of the flip frame 2 is arranged on the top of the telescopic rod 3 and can be rotated by a first limit rotation mechanism, the bottom of the telescopic rod 3 is arranged on the rear end of the base 4 and can be rotated by a lockable rotation mechanism, the middle part of the flip frame 2 is bent toward the front end to form a first folding angle 201 for avoiding the rotation of the fan head 1; when folding, the fan head 1 is rotated to the first folding angle 201 by the rotating assembly, the telescopic rod 3 is contracted and the lockable rotation mechanism is unlocked to make the telescopic rod 3 flip forward and overlap on the base 4, the flip frame 2 flips backward by the first limit rotation mechanism and makes the mesh cover 27 of the fan head 1 overlap on the telescopic rod 3. The folding fan of the present invention has a simple and reasonable structure, is easy to assemble, and is easy to store and store when the seasons change. It is convenient for users to use, reduces the cumbersome assembly process, is simple and quick to operate, and has a good user experience. The first limit rotation mechanism cooperates with the lockable rotation mechanism when the folding fan of the present invention is assembled and used, respectively limiting the fan head 1 and the flip frame 2 at the top of the telescopic rod 3 from continuing to flip downward due to their own weight, and the telescopic rod 3 is flipped toward the front end of the base 4 due to the weight of the fan head 1 and the flip frame 2, thereby avoiding the problem that the folding structure of the existing folding fan is prone to excessive flipping due to the excessive weight of the fan head 1 and the flip angle being out of the normal use state, providing sufficient structural positioning strength and strong supporting force, and cooperating with the first folding angle 201 bent forward at the middle part of the flip frame 2 to make the fan head The center of gravity of 1 is at the center of the base 4, which effectively avoids the problem of unstable operation of the fan head 1 due to excessive rotation of the telescopic rod 3 and the flip frame 2 during assembly and use, and the rotating component can also realize the left and right shaking function of the fan head 1. When folded, the rotating component rotates in coordination with the first folding angle 201, so that the mesh cover 27 of the folded fan head 1 is stacked on the top of the telescopic rod 3. In order to improve the torsional strength of the telescopic rod 3 during extension and extension, and to facilitate folding and storage, the cross-section of the telescopic rod 3 is approximately rectangular, and the wider two sides are respectively opposite to the mesh cover 27 of the fan head 1 and the base 4. Compared with the existing folding fan, after folding, the mesh cover 27 of the fan head 1 faces upward and the back of the fan head 1 is stacked on the telescopic rod 3. The folded state is more stable, more storage space is saved, and packaging materials are further saved and transportation is convenient.

[0031] like Figures 3 to 6As shown, in order to facilitate the control of the fan head 1 by the rotating assembly to take into account the rotation in the folded state and the use state respectively, the rotating assembly includes a rotating seat 5, a motor 6, a driving gear 7 and a fixed gear 8. In an embodiment of the present invention, the back of the fan head 1 can be hinged on the rotating seat 5 so as to be adjustable up and down, and is wrapped with a rear shell 9. The bottom of the rotating seat 5 is provided with a fixed gear 8 which is rotated by a rotating column 501. The bottom of the fixed gear 8 is provided with an insertion cylinder 801. The top of the flip frame 2 is provided with an insertion hole 202, and the insertion cylinder 801 is tightly embedded in the insertion hole 202. The rotating seat 5 is provided with a motor 6. The output shaft 601 of the motor 6 is driven and connected to the driving gear 7 meshing with the fixed gear 8. The rotating column 501 is integrally formed with a wire-passing shaft 10, the bottom of which passes through the insertion cylinder 801 and connects the top of the rotating seat 5 and the inside of the flip frame 2. The bottom of the wire-passing shaft 10 is concavely provided with a card groove 1001, and a clamping ring 11 with a top surface abutting the bottom surface of the insertion cylinder 801 is clamped in the card groove. Thus, the fixed gear 8 is fixed on the top of the flip frame 2 by means of the insertion tube 801. The cooperation between the rotating column 501 at the bottom of the rotating seat 5 and the fixed gear 8 and the cooperation between the wire-passing shaft 10 and the insertion tube 801 enable the rotating base 4 to be arranged on the fixed gear 8 and rotate around the axis of the fixed gear 8 as the central axis. The retaining ring 11 clamped in the groove 1001 at the bottom of the wire-passing shaft 10 abuts against the bottom surface of the insertion tube 801 to effectively prevent the fan head 1 from falling on the flip frame 2, thereby improving the safety performance. At the same time, the power line connected to the fan head 1 and the motor 6 is laid in the wire-passing shaft 10. When the fan head 1 rotates through the fan control of the present application, the motor 6 on the rotating seat 5 drives the driving gear 7 to rotate. Since the driving gear 7 is meshed and connected with the fixed gear 8, the rotating seat 5 finally drives the fan head 1 to rotate to a set angle around the axis of the fixed gear 8. In order to increase the connection strength between the insertion cylinder 801 and the insertion hole 202 and avoid the failure of the fan head 1 to rotate out of place due to loose connection between the insertion cylinder 801 and the insertion hole 202, the outer wall of the insertion cylinder 801 is circumferentially provided with a plurality of anti-skid ribs 802, and the inner wall of the insertion hole 202 is circumferentially provided with a plurality of clips 203 that are snap-fitted with the anti-skid ribs 802. The anti-skid ribs 802 cooperate with the clips 203 so that the fan head 1 can be accurately rotated to any angle within the rotation range when the rotating component is rotated, thereby enhancing its stability and accuracy.

[0032] like Figure 3 and 4As shown, since the present application is a large folding fan, the fan head 1 is heavy. When the fan head 1 is driven to rotate to an accurate angle, the rotation speed of the driving gear 7 driving the fixed gear 8 needs to be reduced and its output torque needs to be increased. The rotating seat 5 is provided with a reduction gear 12 that rotates between the driving gear 7 and the fixed gear 8. The reduction gear 12 includes a large tooth portion 1201 meshed with the driving gear 7 at the top and a small tooth portion 1202 meshed with the fixed gear 8 at the bottom. The diameter of the large tooth portion 1201 is larger than the diameter of the driving gear 7, and the diameter of the small tooth portion 1202 is smaller than the diameter of the fixed gear 8. Thus, the output speed of the driving gear 7 is reduced and the output torque of the driving gear 7 is increased by the reduction gear 12, so as to realize the accurate start and stop of the driving fan head 1.

[0033] like Figures 2 to 6 As shown, in order to limit the rotation angle of the fan head 1 and prevent the fan head 1 from swinging during use or excessive rotation when folded and stored, the rotating assembly also includes a rotation limiting mechanism for limiting the rotation angle of the rotating seat 5 to -60°~180°. The rotation limiting mechanism includes a rotating block 502 provided at the front end of the rotating column 501, a first limiting block 803 provided in the fixed gear 8 and cooperating with the rotating block 502 to limit the rotation of the rotating seat 5 to an angle of -60°, and a second limiting block 804 cooperating with the rotating block 502 to limit the rotation of the rotating seat 5 to an angle of 180°, so that the first limiting block 803 cooperates with the rotating block 502 to allow the fan head 1 to swing to one side only 60°, and can only rotate 180° when folded and stored so that the front of the fan head 1 is in close contact with the telescopic rod 3.

[0034] like Figures 1 to 8 As shown, the first limited rotation mechanism includes a first hinge column 3014, a support arm 204, a limiting groove 205 and a first hinge shaft 22. The first hinge column 3014 is connected to the top rear end of the telescopic rod 3. The first hinge shaft 22 is fixed to the first hinge column 3014 by bolts. A support arm 204 extends from the bottom of the flip frame 2 toward the rear end. The end of the support arm 204 is sleeved on the first hinge shaft 22 and the bottom surface of the support arm 204 rotates to abut the top of the telescopic rod 3. The bottom of the support arm 204 corresponds to the position of the first hinge column 3014 and is also provided with a limiting groove 205 for accommodating the first hinge column 3014. The bottom of the groove rotates to abut the front end surface of the first hinge column 3014. Therefore, when the folding fan of the present application is assembled in the stored folded state and the flip frame 2 is rotated, the bottom surface of the support arm 204 cooperates with the top surface of the telescopic rod 3 to limit the rotation angle of the flip frame 2, so that the rotating assembly at the top of the flip frame 2 and the rotation axis of the fan head 1 are perpendicular to the ground, and the first hinge column 3014 cooperates with the limiting groove 205 that accommodates the first hinge column 3014, effectively improving the torsional strength between the flip frame 2 and the top of the telescopic rod 3, and also serves to limit the rotation angle of the flip frame 2.

[0035] like Figure 1 , Figures 7 to 10 As shown, in order to facilitate the user to manually rotate and lock or unlock the foldable telescopic rod 3 and the base 4, the lockable rotation mechanism includes a second limit rotation mechanism and a locking mechanism, the second limit rotation mechanism includes a second hinge column 401, a hinge bottom cover 303 and a second hinge shaft 23, the second hinge column 401 is connected to the rear end of the base 4, the hinge bottom cover 303 is plugged and connected to the bottom of the telescopic rod 3 and a hinge groove 3031 for accommodating the second hinge column 401 is recessed at its front end, the second hinge shaft 23 is penetrated in the hinge bottom cover 303 and the second hinge column 401 on both sides of the hinge groove 3031, and the hinge bottom cover 303 is inserted into the bottom of the telescopic rod 3 and the hinge bottom cover 303 is inserted into the bottom of the telescopic rod 3 and the hinge groove 3031 is recessed at the front end of the hinge bottom cover 303 and the second hinge column 401. The bottom of the bottom cover 303 is rotated to abut the top surface of the base 4; the locking mechanism includes a T-shaped locking bolt 24 and a locking nut 25, the T-shaped locking bolt 24 is rotatably arranged at the bottom rear end of the base 4 and its locking end 2401 passes through the base 4 from bottom to top, and the rear end of the bottom of the base 4 is recessed with an avoidance groove to form a rotation space for the torsional end of the T-shaped locking bolt 24, and the locking nut 25 is arranged in the hinged bottom cover 303 at a position corresponding to the locking end 2401 of the T-shaped locking bolt 24, and the bottom of the hinged bottom cover 303 is provided with a locking hole for the locking end 2401 to pass through and be screwed into the locking bolt. Therefore, when it is necessary to rotate and lock the telescopic rod 3, the telescopic rod 3 is rotated until the bottom of the hinged bottom cover 303 abuts the top surface of the base 4, and the T-shaped locking bolt 24 is twisted in the avoidance groove so that the locking end 2401 is screwed and locked with the locking nut 25 provided in the hinged bottom cover 303, thereby completing the locking of the telescopic rod 3. When it is necessary to fold and store it, the T-shaped locking bolt 24 is loosened so that the locking end 2401 is disengaged from the locking nut 25 and the retracted telescopic rod 3 is folded to contact the top surface of the chassis, which is convenient and quick.

[0036] like Figure 7 and Fig. 9As shown, in order to facilitate the telescopic locking of the telescopic rod 3 and prevent the weight of the fan head 1 from causing the telescopic rod 3 to shrink during use and affect the user experience, the telescopic rod 3 of the first embodiment of the present invention includes an upper tube 301, a lower tube 302 and a telescopic locking mechanism. The upper tube 301 is slidably connected to the lower tube 302. The telescopic locking mechanism includes a locking sleeve 13, a locking button 14, a button spring 15 and a limiting sleeve 16. The locking sleeve 13 is inserted into the bottom of the upper tube 301 and a limiting protrusion 1302 is radially extended outward from the bottom thereof to abut against the inner wall of the lower tube 302. A button groove 13 is provided on one side of the locking sleeve 13 01, a guide hole 3011 is provided at a position of the upper tube 301 corresponding to the button groove 1301, the locking button 14 is slidably arranged in the button groove 1301 and the guide hole 3011, the button spring 15 abuts between the bottom of the locking button 14 and the bottom of the button groove 1301 and makes the top of the sliding button abut against the inner wall of the lower tube 302, and a locking hole 3021 that matches and exposes the top of the sliding button is provided at the position of the top of the lower tube 302 corresponding to the guide hole 3011, the limiting sleeve 16 is connected to the top of the lower tube 302 and its top protrudes radially inward to have a limiting ring portion 1601 abutting against the outer wall of the upper tube 301. When the fan is folded, the telescopic rod 3 is in a retracted state, and the elastic force of the button spring 15 causes the locking button 14 to abut against the inner wall of the upper tube 301 along the button groove 1301 and the guide hole 3011, until the upper tube 301 is gradually pulled out until the locking hole 3021 is aligned with the guide hole 3011, and the locking button 14 is pushed by the button spring 15 to be stuck in the locking hole 3021, so that the telescopic rod 3 is in a locked state, preventing the telescopic rod 3 from being retracted by external force. When it is necessary to fold and store again, the exposed locking button 14 is pressed to overcome the elastic force of the button spring 15 and move toward the button groove 1301. The locking button 14 is disengaged from the locking hole 3021, and the upper tube 301 can be slid and retracted into the lower tube 302 again, which is convenient and quick. At the same time, the limiting protrusion 1302 of the locking sleeve 13 cooperates with the limiting ring 1601 of the limiting sleeve 16 to effectively prevent the upper tube 301 from being accidentally pulled out of the lower tube 302 and causing dislocation due to excessive force. The abutment between the limiting protrusion 1302 and the inner wall of the lower tube 302 cooperates with the abutment between the limiting ring 1601 and the outer wall of the upper tube 301, so that the shaking caused by the gap between the upper tube 301 and the lower tube 302 when they are telescopically slid is prevented, so that the structure is more stable.

[0037] like Figure 8 and Fig.10As shown, in order to facilitate the adjustment of the telescopic stroke of the telescopic rod 3 so as to adjust the height of the fan head 1 when using, the telescopic rod 3 of the second embodiment of the present invention includes an upper tube 301, a lower tube 302 and a telescopic limiting mechanism, the upper tube 301 is slidably connected in the lower tube 302, the telescopic limiting mechanism includes a transverse sliding cavity 17, a locking slider 18, a slider spring 19, a locking block 20, a block spring 21 and a locking sleeve 13, a transverse sliding cavity 17 is provided on one side of the top of the lower tube 302, the locking slider 18 is slidably arranged in the transverse sliding cavity 17, the slider spring 19 abuts between the locking slider 18 and one side of the transverse sliding cavity 17, and the locking slider 18 is moved toward the upper tube 30 1 is provided with a locking cavity 1801 at the outer wall opening, the locking block 20 is slidably arranged in the locking cavity 1801 through a locking spring and abuts against the outer wall of the upper tube 301, the upper tube 301 is provided with a plurality of locking grooves 3012 corresponding to the outer wall of the locking block 20 and matched with the locking block 20, the sliding end of the locking block 20 is clamped in the locking groove 3012, the two sides and the bottom of the locking groove 3012 are provided with guiding inclined surfaces 3013, the locking slider 18 is provided with a toggle block 1802 exposed outside the upper tube 301, the locking sleeve 13 is inserted into the bottom of the upper tube 301 and the bottom thereof is provided with a limiting convex portion 1302 protruding radially outward to abut against the inner wall of the lower tube 302.When the upper tube 301 and the lower tube 302 are locked in position, the elastic force of the slider spring 19 causes the locking slider 18 to slide toward the middle of the transverse sliding cavity 17, and the locking cavity 1801 of the locking slider 18 is aligned with the locking groove 3012 of the upper tube 301. The elastic force of the locking spring causes the locking block 20 to slide along the locking cavity 1801 toward the locking groove 3012, and the sliding end of the locking block 20 abuts against the bottom of the locking groove 3012 and is clamped in the locking groove 3012. When the user pulls out the upper tube 301, the guide slope 3013 at the bottom of 12 presses the locking slider 18 to overcome the elastic force of the slider spring 19 to slide into the locking cavity 1801, and finally disengages from the locking groove 3012 to abut the outer wall of the upper tube 301, until it falls into the locking groove 3012 below as the upper tube 301 is pulled out, which is convenient and quick, eliminating the need to manually turn the locking slider 18. When the upper tube 301 and the lower tube 302 need to be retracted and adjusted, the locking spring 19 is provided in the lateral sliding cavity 17 to adjust the contraction of the upper tube 301 and the lower tube 302. The toggle block 1802 is toggled on one side of the locking block 1802, so that the locking slider 18 overcomes the elastic force of the slider spring 19 and slides toward one side of the locking cavity 1801, and at the same time drives the locking block 20 in the locking cavity 1801 to slide horizontally, and finally overcomes the elastic force of the locking spring under the guidance of the guide inclined surface 3013 on the side of the locking groove 3012 and disengages from the locking groove 3012, abutting against the outer wall of the upper tube 301 on one side of the locking groove 3012, until the upper tube 301 telescopically slides to reach the position to be adjusted. , loosen the toggle block 1802 so that the sliding end of the locking block 20 is re-locked in the locking groove 3012 to complete the limit locking, which is convenient and quick. At the same time, the limiting protrusion 1302 of the locking sleeve 13 cooperates with the locking block 20 to effectively prevent excessive force from causing the upper tube 301 to be accidentally pulled out of the lower tube 302 and causing disconnection. The abutment between the limiting protrusion 1302 and the inner wall of the lower tube 302 prevents the shaking caused by the gap between the upper tube 301 and the lower tube 302 when they are telescopically sliding, making the structure more stable.

[0038] like Figure 3 and Figure 4As shown, in order to enhance the meshing strength of the driving gear 7 and the fixed gear 8, and to prevent the dust of the folding fan of the present application from falling on the driving gear 7 and the fixed gear 8 during long-term operation, thereby affecting the smoothness of both, the bottom of the rotating seat 5 is connected to a bottom cover 26 surrounding the driving gear 7, the fixed gear 8 and the top of the reduction gear 12, and the bottom cover 26 is respectively provided with a first rotating shaft 2601 and a second rotating shaft 2602 at the positions corresponding to the axial holes of the driving gear and the reduction gear 12, and the bottom cover 26 corresponds to the reduction plug-in An opening 2603 is provided at the position of the cylinder 801 to avoid the insertion of the cylinder 801. At the same time, in order to facilitate the rapid assembly of the bottom cover 26 and the rotating seat 5 during production, buckle edges 2604 are provided on both sides of the bottom cover 26, and a buckle 503 for buckling the buckle edge 2604 is provided at the position of the bottom of the rotating seat 5 corresponding to the buckle edge 2604. During production, the bottom cover 26 can be tightly buckled on the bottom of the rotating seat 5 by simply aligning the buckle edge 2604 of the bottom cover 26 with the buckle 503 at the bottom of the rotating seat 5, thereby improving the production and assembly efficiency.

[0039] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A folding fan, comprising a fan head (1), a flip frame (2), a telescopic rod (3) and a base (4), wherein a mesh cover (27) is provided at the front end of the fan head (1), and characterized in that: The fan head (1) is arranged on the top of the flip frame (2) so as to be rotatable left and right through a rotating assembly, the bottom of the flip frame (2) is arranged on the top of the telescopic rod (3) so as to be limited and flipped through a first limit rotation mechanism, the bottom of the telescopic rod (3) is arranged on the rear end of the base (4) so ​​as to be limited and flipped through a lockable rotation mechanism, and the middle part of the flip frame (2) is bent toward the front end to form a first folding angle (201) for avoiding the fan head (1) from rotating; when folding, the fan head (1) is rotated to the first folding angle (201) through the rotating assembly, the telescopic rod (3) is contracted and the lockable rotation mechanism is unlocked so that the telescopic rod (3) is flipped forward and stacked on the base (4), and the flip frame (2) is flipped backward through the first limit rotation mechanism so that the net cover (27) of the fan head (1) is stacked on the telescopic rod (3); The rotating assembly comprises a rotating seat (5), a motor (6), a driving gear (7) and a fixed gear (8); the fan head (1) is mounted on the rotating seat (5); a fixed gear (8) is provided at the bottom of the rotating seat (5) and is rotated by a rotating column (501); an insertion cylinder (801) is provided at the bottom of the fixed gear (8); an insertion hole (202) is provided at the top of the flip frame (2); the insertion cylinder (801) is tightly embedded in the insertion hole (202); a motor (6) is provided on the rotating seat (5); and an output shaft (601) of the motor (6) is drivingly connected to a driving gear (7) meshing with the fixed gear (8); The rotating assembly further comprises a rotation limiting mechanism for limiting the rotation angle of the rotating seat (5) to -60° to 180°, the rotation limiting mechanism comprising a rotating clamping block (502) arranged at the front end of the rotating column (501), a first limiting block (803) arranged in the fixed gear (8) and cooperating with the rotating clamping block (502) to limit the rotation of the rotating seat (5) to an angle of -60°, and a second limiting block (804) cooperating with the rotating clamping block (502) to limit the rotation of the rotating seat (5) to an angle of 180°.

2. A folding fan according to claim 1, characterized in that: The rotating seat (5) is provided with a reduction gear (12) that rotates between the driving gear (7) and the fixed gear (8); the reduction gear (12) comprises a large tooth portion (1201) meshingly connected to the driving gear (7) at the top and a small tooth portion (1202) meshingly connected to the fixed gear (8) at the bottom; the diameter of the large tooth portion (1201) is larger than the diameter of the driving gear (7), and the diameter of the small tooth portion (1202) is smaller than the diameter of the fixed gear (8).

3. A folding fan according to claim 1, characterized in that: The rotating column (501) is integrally formed with a wire-passing rotating shaft (10) whose bottom passes through the insertion cylinder (801) and is connected to the top of the rotating seat (5) and the inside of the flip frame (2); a clamping groove (1001) is provided on the bottom of the wire-passing rotating shaft (10) in a concave manner, and a clamping ring (11) whose top surface abuts against the bottom surface of the insertion cylinder (801) is clamped in the clamping groove (1001).

4. A folding fan according to claim 1, characterized in that: The first limited rotation mechanism comprises a first hinge column (3014), a support arm (204), a limit groove (205) and a first hinge shaft (22); the first hinge column (3014) is connected to the top rear end of the telescopic rod (3); the first hinge shaft (22) is fixed to the first hinge column (3014) by bolts; a support arm (204) is extended from the bottom of the flip frame (2) toward the rear end; the end of the support arm (204) is sleeved on the first hinge shaft (22) and the bottom surface of the support arm (204) is rotatably abutted against the top of the telescopic rod (3); the bottom of the support arm (204) is also provided with a limit groove (205) for accommodating the first hinge column (3014) at a position corresponding to the first hinge column (3014); the bottom of the groove is rotatably abutted against the front end surface of the first hinge column (3014).

5. A folding fan according to claim 1, characterized in that: The lockable rotation mechanism comprises a second position-limiting rotation mechanism and a locking mechanism, wherein the second position-limiting rotation mechanism comprises a second hinged column (401), a hinged bottom cover (303) and a second hinged shaft (23), wherein the second hinged column (401) is connected to the rear end of the base (4), the hinged bottom cover (303) is plugged into the bottom of the telescopic rod (3) and a hinged groove (3031) for accommodating the second hinged column (401) is recessed at the front end thereof, the second hinged shaft (23) is passed through the hinged bottom cover (303) and the second hinged column (401) on both sides of the hinged groove (3031), and the bottom of the hinged bottom cover (303) is rotatably abutted against the base (4). 4); the locking mechanism comprises a T-shaped locking bolt (24) and a locking nut (25); the T-shaped locking bolt (24) is rotatably arranged at the rear end of the bottom of the base (4) and its locking end (2401) passes through the base (4) from bottom to top; the rear end of the bottom of the base (4) is recessed with an avoidance groove to form a rotation space for the torsion end of the T-shaped locking bolt (24); the locking nut (25) is arranged in a position corresponding to the locking end (2401) of the T-shaped locking bolt (24) in the hinged bottom cover (303); and the bottom of the hinged bottom cover (303) is provided with a locking hole for the locking end (2401) to pass through and be screwed into the locking bolt.

6. A folding fan according to claim 1, characterized in that: The telescopic rod (3) comprises an upper tube (301), a lower tube (302) and a telescopic locking mechanism. The upper tube (301) is slidably connected to the lower tube (302). The telescopic locking mechanism comprises a locking sleeve (13), a locking button (14), a button spring (15) and a limiting sleeve (16). The locking sleeve (13) is inserted into the bottom of the upper tube (301) and has a limiting convex portion (1302) protruding radially outward from the bottom of the upper tube (301) and abutting against the inner wall of the lower tube (302). A button groove (1301) is provided on one side of the locking sleeve (13). A guide groove (1301) is provided at a position of the upper tube (301) corresponding to the button groove (1301). The locking button (14) is slidably arranged in the button groove (1301) and the guide hole (3011), the button spring (15) abuts between the bottom of the locking button (14) and the bottom of the button groove (1301) and makes the top of the sliding button abut against the inner wall of the lower tube (302), the top of the lower tube (302) corresponding to the guide hole (3011) is provided with a locking hole (3021) that matches and exposes the top of the sliding button, and the limiting sleeve (16) is connected to the top of the lower tube (302) and has a limiting ring portion (1601) protruding radially inward at the top thereof and abutting against the outer wall of the upper tube (301).

7. A folding fan according to claim 1, characterized in that: The telescopic rod (3) comprises an upper tube (301), a lower tube (302) and a telescopic limiting mechanism. The upper tube (301) is slidably connected in the lower tube (302). The telescopic limiting mechanism comprises a transverse sliding cavity (17), a locking slider (18), a slider spring (19), a locking block (20), a block spring (21) and a locking sleeve (13). A transverse sliding cavity (17) is provided on one side of the top of the lower tube (302). The locking slider (18) is slidably arranged in the transverse sliding cavity (17). The slider spring (19) abuts between the locking slider (18) and one side of the transverse sliding cavity (17). The locking slider (18) is provided with a locking cavity (1801) open to the outer wall of the upper tube (301). The locking slider (19) is provided with a locking block (20), a locking block spring (21) and a locking sleeve (13). The fixed block (20) is slidably arranged in the locking cavity (1801) through a locking spring and abuts against the outer wall of the upper tube (301); the upper tube (301) is provided with a plurality of locking grooves (3012) corresponding to the outer wall of the locking block (20) and matched with the locking block (20); the sliding end of the locking block (20) is clamped in the locking groove (3012); both sides and the bottom of the locking groove (3012) are provided with guiding inclined surfaces (3013); the locking slider (18) is provided with a toggle block (1802) exposed outside the upper tube (301); the locking sleeve (13) is inserted into the bottom of the upper tube (301) and a limiting convex portion (1302) is radially extended outward at the bottom thereof and abuts against the inner wall of the lower tube (302).

8. A folding fan according to claim 2, characterized in that: The bottom of the rotating seat (5) is connected to a bottom cover (26) surrounding the top of the driving gear (7), the fixed gear (8) and the reduction gear (12); the bottom cover (26) is respectively provided with a first rotating shaft (2601) and a second rotating shaft (2602) at positions corresponding to the axial center holes of the driving gear and the reduction gear (12); and the bottom cover (26) is provided with an opening (2603) for avoiding the reduction plug-in cylinder (801) at a position corresponding to the reduction plug-in cylinder (801).

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