CN113279990A

CN113279990A - Folding fan

Info

Publication number: CN113279990A
Application number: CN202110716228.0A
Authority: CN
Inventors: 徐中亚; 韦兴龙; 朱炳悦
Original assignee: Jiangmen Jinwoke Technology Co ltd
Current assignee: Jiangmen Jinwoke Technology Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-08-20

Abstract

The invention provides a folding fan, which comprises a fan head, a turnover frame, a telescopic rod and a base, wherein the front end of the fan head is provided with a mesh enclosure, the fan head can be arranged at the top of the turnover frame in a left-right rotating mode through a rotating assembly, the bottom of the turnover frame is arranged at the top of the telescopic rod in a limiting and turnover mode through a first limiting rotating mechanism, the bottom of the telescopic rod is arranged at the rear end of the base in a limiting and turnover mode through a lockable rotating mechanism, and the middle of the turnover frame is provided with a first folding angle which avoids the fan head to rotate in a forward bending mode; when folding, the fan head passes through rotating assembly and rotates to first dog-ear in, the telescopic link shrink and can lock the slewing mechanism unblock and make the telescopic link overturn forward and fold and locate on the base, the roll-over stand through first spacing slewing mechanism upset backward and make the screen panel of fan head fold and locate on the telescopic link. This folding fan simple structure is reasonable, and the high equipment and accomodate and deposit of just being convenient for of folding structure stable strength, and user experience is good, and saves more and receive and release the space, can further save packaging material and be convenient for transport.

Description

Folding fan

Technical Field

The invention relates to the technical field of blowers, in particular to a folding fan.

Background

At present, some domestic electric fans that air-out area is big are bulky, are unfavorable for packing the transportation, often each part is torn open when the transportation and is reduced the packing volume, need assemble again when the user uses, in addition, the fan is the domestic appliance of seasonal use, weather changes the cold back, it is loaded down with trivial details to dismantle the process of accomodating, still leads to spare part to lose easily, and need assemble again when using next time, waste time and energy, bring very big inconvenience for the user like this.

The existing fan which saves space only through folding of a simple folding mechanism is often only suitable for a small fan with a small size because the strength of the folding mechanism is not enough, and when the folding mechanism is used for a large fan, the stability of the fan head is insufficient due to the fact that the weight of the fan head cannot be borne, and faults are caused.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the large folding fan which is simple in structure, high in strength, easy and quick in assembly and storage processes and convenient to transport.

The present invention thus achieves the above objects:

a folding fan comprises a fan head, a turnover frame, a telescopic rod and a base, wherein a mesh enclosure is arranged at the front end of the fan head, the fan head can be arranged at the top of the turnover frame in a left-right rotating mode through a rotating assembly, the bottom of the turnover frame is arranged at the top of the telescopic rod in a limiting and turnover mode through a first limiting rotating mechanism, the bottom of the telescopic rod is arranged at the rear end of the base in a limiting and turnover mode through a lockable rotating mechanism, and a first bevel for avoiding the rotation of the fan head is arranged in the middle of the turnover frame in a bent mode towards the front end; when the folding fan is folded, the fan head is rotated into a first folding angle through the rotating assembly, the telescopic rod is contracted and can be unlocked by the rotating mechanism, so that the telescopic rod is forwards turned and is folded on the base, and the turnover frame is backwards turned through the first limiting rotating mechanism and enables the mesh enclosure of the fan head to be folded on the telescopic rod.

The fan head is installed on the rotary seat, the fixed gear is arranged at the bottom of the rotary seat through a rotating column, an inserting cylinder is arranged at the bottom of the fixed gear, an inserting hole is formed in the top of the turnover frame, the inserting cylinder is tightly embedded in the inserting hole, a motor is arranged on the rotary seat, and an output shaft of the motor is in driving connection with the driving gear in meshed connection with the fixed gear.

The rotating seat is provided with a reduction gear in a rotating mode between the driving gear and the fixed gear, the reduction gear comprises a large tooth portion and a small tooth portion, the top of the large tooth portion is in meshed connection with the driving gear, the bottom of the large tooth portion is in meshed connection with the fixed gear, the diameter of the large tooth portion is larger than that of the driving gear, and the diameter of the small tooth portion is smaller than that of the fixed gear.

The rotating assembly is internally provided with a rotating limiting mechanism for limiting the rotating angle of the rotating seat to be minus 60 degrees to 180 degrees, and the rotating limiting mechanism comprises a rotating clamping block arranged at the front end of the rotating column, a first limiting block arranged in the fixed gear and matched with the rotating clamping block to enable the rotating seat to rotate and limit the rotating seat at the angle of minus 60 degrees, and a second limiting block matched with the rotating clamping block to enable the rotating seat to rotate and limit the rotating seat at the angle of 180 degrees.

The rotary column is internally and integrally formed with a line-passing rotating shaft, the bottom of the line-passing rotating shaft penetrates through the insertion cylinder and is communicated with the top of the rotary seat and the inside of the turnover frame, the bottom of the line-passing rotating shaft is outwards concave and provided with a clamping groove, and a clamping ring with the top surface abutting against the bottom surface of the insertion cylinder is clamped in the clamping groove.

Wherein, first spacing slewing mechanism includes first hinge post, support arm, spacing groove and first articulated shaft, first hinge post is connected in the top rear end of telescopic link, first articulated shaft passes through the bolt fastening on first hinge post, the bottom of roll-over stand extends towards the rear end has the support arm, the end cover of support arm is established on the first articulated shaft and the bottom surface of support arm rotate the top of butt telescopic link, the position that the bottom of support arm corresponds first hinge post still is equipped with the spacing groove that holds first hinge post, and its tank bottom rotates the preceding terminal surface of the first hinge post of butt.

The lockable rotating mechanism comprises a second limiting rotating mechanism and a locking mechanism, the second limiting rotating mechanism comprises 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 inserted into the bottom of the telescopic rod, the front end of the hinge bottom cover is concavely provided with a hinge groove for accommodating the second hinge column, the second hinge shaft penetrates through the hinge bottom cover and the second hinge column on the two sides of the hinge groove, and the bottom of the hinge bottom cover is rotatably abutted to the top surface of the base; locking mechanism includes T type locking bolt and lock nut, the rotatable bottom rear end of locating the base of T type locking bolt and its locking end are passed by lower supreme the base, the concave groove of dodging that forms T type locking bolt wrench movement end rotation space that is equipped with in rear end of base bottom, lock nut locates the position that corresponds T type locking bolt's locking end in the articulated bottom, the locking hole that is used for the locking end to pass and spiral shell to close and connect locking bolt is offered to the bottom of articulated bottom.

Wherein the telescopic rod comprises an upper pipe, a lower pipe and a telescopic locking mechanism, the upper pipe is connected in the lower pipe in a sliding way, the telescopic locking mechanism comprises a locking sleeve, a locking button, a button spring and a limiting sleeve, the locking sleeve is inserted in the bottom of the upper pipe, the bottom of the locking sleeve is radially and outwardly extended with a limiting convex part which is abutted against the inner wall of the lower pipe, one side of the locking sleeve is provided with a button groove, the upper pipe is provided with a guide hole corresponding to the button groove, the locking button is arranged in the button groove and the guide hole in a sliding manner, the button spring is abutted between the bottom of the locking button and the bottom of the button groove and enables the top of the sliding button to be abutted against the inner wall of the lower pipe, a locking hole which is matched with and exposes out of the top of the sliding button is arranged at the top end of the lower pipe corresponding to the guide hole, the limiting sleeve is sleeved on the top of the lower pipe, and the top of the limiting sleeve is extended with a limiting ring part which is abutted against the outer wall of the upper pipe in a radial inward protruding mode.

Wherein, the telescopic rod comprises an upper pipe, a lower pipe and a telescopic limiting mechanism, the upper pipe is connected in the lower pipe in a sliding way, the telescopic limiting mechanism comprises a transverse sliding cavity, a locking slide block, a slide block spring, a locking fixture block, a fixture block spring and a locking sleeve, one side of the top of the lower pipe is provided with the transverse sliding cavity, the locking slide block is arranged in the transverse sliding cavity in a sliding way, the slide block spring is abutted between the locking slide block and one side of the transverse sliding cavity, the locking slide block is provided with a locking cavity towards the opening of the outer wall of the upper pipe, the locking fixture block is arranged in the locking cavity in a sliding way through the locking spring and abutted against the outer wall of the upper pipe, the outer wall of the upper pipe corresponding to the locking fixture block is provided with a plurality of locking clamp grooves matched with the locking fixture block, the sliding-out end of the locking clamp groove is clamped in the locking clamp groove, two sides and the bottom of the locking clamp groove are provided with guiding inclined planes, the locking slide block is provided with a shifting block exposed out of the upper pipe, the locking sleeve is inserted in the bottom of the upper pipe, and the bottom of the locking sleeve radially and outwards protrudes and extends with a limiting convex part which is abutted against the inner wall of the lower pipe.

The bottom of the rotating seat is connected with a bottom cover surrounding the tops of the driving gear, the fixed gear and the reduction gear, a first rotating shaft and a second rotating shaft penetrate through the bottom cover corresponding to the positions of the driving gear and the shaft center hole of the reduction gear respectively, and an opening avoiding the inserting cylinder is formed in the bottom cover corresponding to the position of the reduction inserting cylinder.

The invention has the beneficial effects that:

the folding fan has simple and reasonable structure, is convenient for assembly and storage of the fan during season change, is convenient for use by users, reduces complicated assembly processes, has simple and rapid operation and better user experience, and has the advantages that when the folding fan is assembled and used, the first limit rotating mechanism is matched with the lockable rotating mechanism, respectively limits the situation that the fan head and the turnover frame part are continuously turned over downwards at the top end of the telescopic rod due to dead weight and the telescopic rod is turned over to the front end of the base by the weight of the fan head and the turnover frame, avoids the problem that the folding structure of the existing folding fan is easy to be turned over excessively due to the overweight of the fan head part and is separated from the turnover angle in a normal use state, provides enough structural positioning strength and stronger bearing force, and is matched with the first folding angle bent forwards in the middle part of the turnover frame to ensure that the gravity center of the fan head is positioned at the center of the base, the problem that the operation of fan head is not stable enough is excessive and the upset is not in place and made in telescopic link and roll-over stand upset when effectively avoiding equipment to use, and when folding, the first dog-ear of rotatory cooperation of rotating assembly, the screen panel that makes the fan head after folding folds the top of locating the telescopic link, fan head screen panel up and fan head back fold locate the telescopic link after folding fan folding now, fold condition is more stable, save more and receive and release the space, further save packaging material and be convenient for the transportation.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of the present invention in a fully folded condition;

FIG. 3 is an exploded view of the fan head and roll-over stand attachment of the present invention;

FIG. 4 is a schematic cross-sectional view of the fan head and roll-over stand connection of the present invention;

FIG. 5 is a schematic perspective view of the rotary base of the present invention;

FIG. 6 is a schematic perspective view of a fixed gear of the present invention;

FIG. 7 is an exploded view of a first embodiment of the connecting portion of the telescoping pole and the base of the present invention;

FIG. 8 is an exploded view of a second embodiment of the connecting portion of the telescopic rod and the base of the present invention;

FIG. 9 is a cross-sectional structural schematic view of a first embodiment of a telescoping rod portion of the present invention;

FIG. 10 is a cross-sectional structural schematic view of a second embodiment of a telescoping rod portion of the present invention.

In the above figures, 1, a fan head, 2, a roll-over stand, 201, a first bevel, 202, an insertion hole, 203, a clamping rib, 204, a support arm, 205, a limit groove, 3, a telescopic rod, 301, an upper pipe, 3011, a guide hole, 3012, a locking clamping groove, 3013, a guide inclined plane, 3014, a first hinge post, 302, a lower pipe, 3021, a locking hole, 303, a hinge bottom cover, 3031, a hinge groove, 4, a base, 401, a second hinge post, 5, a rotary base, 501, a rotary post, 502, a rotary clamping block, 503, a buckle, 6, a motor, 601, an output shaft, 7, a driving gear, 8, a fixed gear, 801, an insertion cylinder, 802, an anti-skid rib, 803, a first limit block, 804, a second limit block, 9, a rear shell, 10, a thread through rotary shaft, 1001, a clamping groove, 11, a clamping ring, 12, a reduction gear, 1301, a large tooth part, 1202, a small tooth part, 13, a locking sleeve, 1302, a button groove, a limit protrusion, 14. the locking device comprises a locking button, 15, a button spring, 16, a limiting sleeve, 1601, a limiting ring part, 17, a transverse sliding cavity, 18, a locking slider, 1801, a locking cavity, 1802, a toggle block, 19, a slider spring, 20, a locking fixture block, 21, a fixture block spring, 22, a first hinge shaft, 23, a second hinge shaft, 24, a T-shaped locking bolt, 2401, a locking end, 25, a locking nut, 26, a bottom cover, 2601, a first rotating shaft, 2602, a second rotating shaft, 2603, an opening, 2604, a fastening edge, 27 and a mesh enclosure.

Detailed Description

As shown in fig. 1 to 4, a folding fan comprises a fan head 1, a roll-over stand 2, a telescopic rod 3 and a base 4, wherein a mesh enclosure 27 is arranged at the front end of the fan head 1, the fan head 1 is arranged at the top of the roll-over stand 2 through a rotating assembly and can rotate left and right, the bottom of the roll-over stand 2 is arranged at the top of the telescopic rod 3 through a first limiting rotating mechanism in a limiting and overturning manner, the bottom of the telescopic rod 3 is arranged at the rear end of the base 4 through a lockable rotating mechanism in a limiting and overturning manner, and a first bevel 201 avoiding the rotation of the fan head 1 is bent towards the front end in the middle of the roll-over stand 2; when folding, fan head 1 rotates to first dog-ear 201 in through rotatory subassembly, the telescopic link 3 shrink and can lock the slewing mechanism unblock and make telescopic link 3 overturn forward and fold and locate on base 4, roll-over stand 2 overturns backward through first spacing slewing mechanism and makes the screen panel 27 of fan head 1 fold and locate on telescopic link 3. The folding fan has simple and reasonable structure, is convenient for assembly and storage of the fan during season change, is convenient for a user to use, reduces complicated assembly processes, has simple and rapid operation and better user experience, and has the advantages that when the folding fan is assembled and used, the first limiting rotating mechanism is matched with the lockable rotating mechanism, respectively limits the situation that the fan head 1 and the turning frame 2 are continuously turned downwards at the top end of the telescopic rod 3 due to dead weight and the telescopic rod 3 is turned over to the front end of the base 4 by the weight of the fan head 1 and the turning frame 2, avoids the problem that the folding structure of the existing folding fan is easy to be turned over excessively due to the overweight of the fan head 1 and is separated from the turning angle in a normal use state, provides enough structural positioning strength and stronger bearing force, is matched with the first turning angle 201 bent forwards at the middle part of the turning frame 2, the gravity center of the fan head 1 is positioned at the center of the base 4, the problem that the fan head 1 is not stable enough due to the over-rotation and the not-in-place rotation of the telescopic rod 3 and the turning frame 2 during the assembly and the use is effectively avoided, the rotating component can also realize the left-right shaking function of the fan head 1, when the fan head is folded, the rotating component rotates to match with the first folding angle 201, so that the mesh enclosure 27 of the folded fan head 1 is overlapped above the telescopic rod 3, in order to improve the torsional strength of the telescopic rod 3 during expansion and contraction and facilitate folding and storage, the cross section of the telescopic rod 3 is approximately rectangular, and the both sides of broad are relative with screen panel 27 and the base 4 of fan head 1 respectively, fan head 1 screen panel 27 up and fan head 1 back fold locate on telescopic link 3 after folding fan than current, fold condition is more stable, saves more and receive and release the space, further saves packaging material and is convenient for transport.

As shown in fig. 3 to 6, in order to facilitate the rotation of the fan head 1 in both the folded state and the use state through the rotating assembly, the rotating assembly includes a rotating base 5, a motor 6, a driving gear 7 and a fixed gear 8, in the embodiment of the invention, the back of the fan head 1 is hinged on the rotating base 5 and is wrapped with a rear shell 9, the bottom of the rotating base 5 is rotatably provided with the fixed gear 8 through a rotating column 501, the bottom of the fixed gear 8 is provided with an inserting cylinder 801, the top of the roll-over stand 2 is provided with an inserting hole 202, the inserting cylinder 801 is tightly inserted into the inserting hole 202, the rotating base 5 is provided with the motor 6, an output shaft 601 of the motor 6 is connected with the driving gear 7 engaged with the fixed gear 8, the rotating column 501 is internally and integrally formed with a wire passing rotating shaft 10, the bottom of which passes through the inserting cylinder 801 and is communicated with the top of the rotating base 5 and the inside of the roll-over stand 2, the bottom of the wire passing rotating shaft 10 is provided with a clamping groove 1001 in an outward concave manner, and a clamping ring 11 with a top surface abutting against the bottom surface of the inserting cylinder 801 is clamped in the clamping groove. Thereby fixed gear 8 is fixed at the top of roll-over stand 2 through the cartridge 801 cartridge, the cooperation of rotation post 501 and fixed gear 8 and the cooperation of crossing line pivot 10 and cartridge 801 of roating seat 5 bottom make rotating base 4 use the axle center of fixed gear 8 as the pivoted setting on fixed gear 8 of center pin, it effectively avoids fan head 1 to drop on roll-over stand 2 to cross the bottom surface of snap ring 11 butt cooperation cartridge 801 that clamps in the draw-in groove 1001 of line pivot 10 bottom, the security performance is improved, the power cord that is connected to fan head 1 and motor 6 simultaneously lays in crossing line pivot 10. When the fan head 1 is controlled to rotate through the fan, the motor 6 on the rotating seat 5 drives the driving gear 7 to rotate, the driving gear 7 is meshed with the fixed gear 8 to be connected, finally the rotating seat 5 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, the problem that the rotation of the fan head 1 is not in place due to the fact that the insertion cylinder 801 is connected between the insertion hole 202 loosely is avoided, a plurality of anti-slip ribs 802 are distributed on the outer wall of the insertion cylinder 801 along the circumferential direction, a plurality of clamping ribs 203 for clamping the anti-slip ribs 802 are distributed on the inner wall of the insertion hole 202 along the circumferential direction, the anti-slip ribs 802 are matched with the clamping ribs 203, so that the fan head 1 can accurately rotate to any angle in a rotation range when rotating through a rotating assembly, and the stability and the accuracy of the fan head are enhanced.

As shown in fig. 3 and 4, since the present application is a large folding fan, the fan head 1 is heavy, and when the fan head 1 is driven to rotate to an accurate angle, it is necessary to reduce the rotation speed of the driving gear 7 for driving the fixed gear 8 and increase the output torque thereof, the rotating base 5 is rotatably provided with a reduction gear 12 between the driving gear 7 and the fixed gear 8, the reduction gear 12 includes a large tooth portion 1201 whose top is in meshing connection with the driving gear 7 and a small tooth portion 1202 whose bottom is in meshing connection with the fixed gear 8, the diameter of the large tooth portion 1201 is greater than that of the driving gear 7, and the diameter of the small tooth portion 1202 is smaller than that of the fixed gear 8. Therefore, the reduction of the output rotating speed of the driving gear 7 and the improvement of the output torque of the driving gear 7 are realized through the reduction gear 12, and the accurate start and stop of the driving fan head 1 are realized.

As shown in fig. 2 to 6, in order to limit the rotation angle of the fan head 1 and prevent the fan head 1 from excessively rotating during swinging, shaking or folding and storing in use, the rotation assembly further comprises a rotation limiting mechanism for limiting the rotation angle of the rotary base 5 to-60 ° to-180 °, the rotation limiting mechanism comprises a rotation fixture block 502 arranged at the front end of the rotation column 501, a first limiting block 803 arranged in the fixed gear 8 and matched with the rotation fixture block 502 to enable the rotary base 5 to rotate and limit at-60 ° and a second limiting block 804 matched with the rotation fixture block 502 to enable the rotary base 5 to rotate and limit at 180 ° so that the first limiting block 803 is matched with the rotation fixture block 502 to enable the fan head 1 to swing only 60 ° when swinging to one side, and the telescopic rod can only rotate 180 ° when folding and storing to enable the front surface of the fan head 1 to be tightly attached to the telescopic rod 3.

As shown in fig. 1 to 8, the first limiting rotation mechanism includes a first hinge post 3014, a support arm 204, a limiting groove 205 and a first hinge shaft 22, the first hinge post 3014 is connected to the rear end of the top of the telescopic rod 3, the first hinge shaft 22 is fixed on the first hinge post 3014 through a bolt, the bottom of the roll-over stand 2 extends towards the rear end to have the support arm 204, the tail end of the support arm 204 is sleeved on the first hinge shaft 22, the bottom surface of the support arm 204 rotates to abut against the top of the telescopic rod 3, the position of the bottom of the support arm 204 corresponding to the first hinge post 3014 is further provided with the limiting groove 205 for accommodating the first hinge post 3014, and the bottom of the groove rotates to abut against the front end surface of the first hinge post 3014. Thereby when accomodating fold condition equipment the folding fan of this application and rotating roll-over stand 2, the rotation angle of roll-over stand 2 has been restricted to the top surface of the bottom surface cooperation telescopic link 3 of support arm 204, the rotating assembly who makes 2 tops of roll-over stand and the rotation axle center and the ground vertical of fan head 1, first articulated post 3014 cooperation holds first articulated post 3014's spacing groove 205, the torsional strength between roll-over stand 2 and the 3 tops of telescopic link has effectively been improved, also play the function of restriction roll-over stand 2 rotation angle simultaneously.

As shown in fig. 1 and 7 to 10, in order to facilitate the user to manually rotate and lock or unlock the folding telescopic rod 3 and the base 4, the lockable rotating mechanism includes a second limiting rotating mechanism and a locking mechanism, the second limiting rotating mechanism includes a second hinge column 401, a hinge bottom cover 26303 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 26303 is inserted into the bottom of the telescopic rod 3 and the front end thereof is concavely provided with a hinge groove 3031 for accommodating the second hinge column 401, the second hinge shaft 23 is inserted into the hinge bottom cover 26303 and the second hinge column 401 at two sides of the hinge groove 3031, and the bottom of the hinge bottom cover 26303 is rotated to abut against the top surface of the base 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, a locking end 2401 of the T-shaped locking bolt 24 penetrates through the base 4 from bottom to top, an avoiding groove forming a rotating space of the twisting end of the T-shaped locking bolt 24 is concavely arranged at the rear end of the bottom of the base 4, the locking nut 25 is arranged in the hinged bottom cover 26303 at a position corresponding to the locking end 2401 of the T-shaped locking bolt 24, and a locking hole for the locking end 2401 to penetrate through and be screwed with the locking bolt is formed in the bottom of the hinged bottom cover 26303. Therefore, when the telescopic rod 3 needs to be locked and rotated, the telescopic rod 3 is rotated until the bottom of the hinged bottom cover 26303 abuts against the top surface of the base 4, the T-shaped locking bolt 24 is twisted in the avoiding groove, the locking end 2401 of the T-shaped locking bolt is screwed and locked with the locking nut 25 arranged in the hinged bottom cover 26303, the telescopic rod 3 is locked, when the folding and storage are needed, the T-shaped locking bolt 24 is unscrewed, the locking end 2401 of the T-shaped locking bolt is separated from the locking nut 25, and the retracted telescopic rod 3 is folded and contacted with the top surface of the chassis conveniently and quickly.

As shown in fig. 7 and 9, in order to facilitate the telescopic locking of the telescopic rod 3 and avoid the influence of the contraction of the telescopic rod 3 caused by the weight of the fan head 1 during the use process, the telescopic rod 3 according to 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 the bottom of the locking sleeve 13 radially protrudes outward to form a limiting protrusion 1302 abutting against the inner wall of the lower tube 302, one side of the locking sleeve 13 is provided with a button slot 1301, the upper tube 301 is provided with a guide hole 3011 corresponding to the button slot 1301, the locking button 14 is slidably arranged in the button slot 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 slot 1301 and abuts against the inner wall of the lower tube 302, the top end of the lower tube 302 is provided with a locking hole 3021 corresponding to the guide hole 3011 and exposing the top of the sliding button, the stop collar 16 is connected to the top of the lower tube 302, and the top of the stop collar is extended with a stop ring portion 1601 abutting against the outer wall of the upper tube 301 in a radial inward protrusion manner. When the fan is folded, the telescopic rod 3 is in a contracted state, the elastic force of the button spring 15 enables the locking button 14 to abut against the inner wall of the upper pipe 301 along the button groove 1301 and the guide hole 3011 until the upper pipe 301 is gradually pulled out until the locking hole 3021 aligns with the guide hole 3011, the locking button 14 is pushed into the clamping locking hole 3021 by the button spring 15, the telescopic rod 3 is in a locked state, the telescopic rod 3 is prevented from being contracted by external force, when the upper pipe 301 needs to be folded and stored again, the exposed locking button 14 is pressed to slide into the button groove 1301 against the elastic force of the button spring 15 until the locking button 14 is separated from the locking hole 3021, the upper pipe 301 can slide and contract into the lower pipe 302 again, the operation is convenient and fast, meanwhile, the limiting convex part 1302 of the locking sleeve 13 can effectively prevent the limiting ring part 1601 of the limiting sleeve 16 from being accidentally pulled out of the lower pipe 302 to cause dislocation, the limiting convex part 1302 abuts against the limiting ring 1601 of the inner wall of the lower, the upper pipe 301 and the lower pipe 302 are prevented from shaking due to the gap therebetween when they are made to slide in a telescopic manner, and the structure is made more stable.

As shown in fig. 8 and 10, in order to adjust the telescopic stroke of the telescopic rod 3 conveniently, so as to adjust the blowing height of the fan head 1 when in use, the telescopic rod 3 according to 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 to the lower tube 302, the telescopic limiting mechanism includes a transverse sliding cavity 17, a locking slider 18, a slider spring 19, a locking latch 20, a latch spring 21 and a locking sleeve 13, the transverse sliding cavity 17 is disposed on one side of the top of the lower tube 302, the locking slider 18 is slidably disposed 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 facing the outer wall of the upper tube 301, the locking latch 20 is slidably disposed in the locking cavity 1801 through the locking spring and abuts against the outer wall of the upper tube 301, the upper tube 301 is provided with a plurality of locking slots 3012 corresponding to the locking latch 20, the sliding end of the locking fixture block 20 is clamped in the locking fixture slot 3012, the two sides and the bottom of the locking fixture slot 3012 are provided with guiding inclined planes 3013, the locking slider 18 is provided with a toggle block 1802 exposed out of the upper tube 301, the locking sleeve 13 is inserted into the bottom of the upper tube 301, and the bottom of the locking sleeve radially and outwardly protrudes and extends with a limit convex part 1302 abutting against the inner wall of the lower tube 302. Therefore, when the upper tube 301 and the lower tube 302 are locked in a limiting manner, the locking slider 18 slides towards the middle of the transverse sliding cavity 17 by the elastic force of the slider spring 19, the locking cavity 1801 of the locking slider 18 is aligned with the locking slot 3012 of the upper tube 301, the locking fixture block 20 slides towards the locking slot 3012 along the locking cavity 1801 by the elastic force of the locking spring, the sliding end of the locking fixture block 20 abuts against the bottom of the locking slot 3012 and is clamped in the locking slot 3012, at the moment, when a user pulls out the upper tube 301, the guide inclined plane 3013 at the bottom of the locking slot 3012 presses the locking slider 18 to slide towards the locking cavity 1801 against the elastic force of the slider spring 19 and finally separates from the locking slot 3012 to abut against the outer wall of the upper tube 301 until the upper tube 301 is pulled out and falls into the locking slot 3012 below, so that the manual poking of the locking slider 18 is avoided, and when the upper tube 301 and the lower tube 302 need to be adjusted in a contracting manner, the poking block 1802 is poked towards one side of the transverse sliding cavity 17, the lock slider 18 is slid to one side in the lock chamber 1801 against the elastic force of the slider spring 19, meanwhile, the locking fixture block 20 in the locking cavity 1801 is driven to slide transversely, and finally, under the guidance of the guide inclined plane 3013 at the side part of the locking slot 3012, the locking fixture block is separated from the locking slot 3012 by overcoming the elasticity of the locking spring, and is abutted against the outer wall of the upper tube 301 at one side of the locking slot 3012 until the upper tube 301 slides telescopically to reach the position to be adjusted, the toggle block 1802 is released to enable the sliding-out end of the locking fixture block 20 to be clamped in the locking slot 3012 again, the limiting locking is completed, and the operation is convenient and fast, meanwhile, the limit convex part 1302 of the locking sleeve 13 is matched with the locking fixture block 20, so that the upper pipe 301 can be effectively prevented from being pulled out of the lower pipe 302 by mistake due to excessive force, and the shaking caused by the gap between the upper pipe 301 and the lower pipe 302 when the upper pipe 301 and the lower pipe 302 are telescopically slid due to the abutting of the limit convex part 1302 and the inner wall of the lower pipe 302 is prevented, so that the structure is more stable.

As shown in fig. 3 and 4, in order to enhance the meshing strength of the driving gear 7 and the fixed gear 8, and to prevent dust generated by long-time operation of the folding fan of the present application from falling onto the driving gear 7 and the fixed gear 8 and affecting the smoothness of the driving gear 7 and the fixed gear 8, a bottom cover 26 surrounding the tops of the driving gear 7, the fixed gear 8 and the reduction gear 12 is connected to the bottom of the rotary base 5, a first rotating shaft 2601 and a second rotating shaft 2602 are respectively inserted into the bottom cover 26 corresponding to the axial holes of the driving gear and the reduction gear 12, an opening 2603 of the insertion cylinder 801 is opened in the bottom cover 26 corresponding to the position of the reduction insertion cylinder 801, and simultaneously, in order to facilitate quick assembly of the bottom cover 26 and the rotary base 5 during production, buckling edges 2604 are provided on both sides of the bottom cover 26, a buckle 503 for buckling the buckling edge 2604 is provided at the position of the bottom of the rotary base 5 corresponding to the buckling edge 2604, so that the bottom cover 26 can be tightly buckled to the bottom of the rotary base 5, the production and assembly efficiency is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims

1. The utility model provides a folding fan, includes fan head (1), roll-over stand (2), telescopic link (3) and base (4), the front end of fan head (1) is equipped with screen panel (27), its characterized in that: the fan head (1) is arranged at the top of the turnover frame (2) in a left-right rotating mode through the rotating assembly, the bottom of the turnover frame (2) is arranged at the top of the telescopic rod (3) in a limiting and overturning mode through the first limiting rotating mechanism, the bottom of the telescopic rod (3) is arranged at the rear end of the base (4) in a limiting and overturning mode through the lockable rotating mechanism, and the middle of the turnover frame (2) is provided with a first folding angle (201) which avoids the rotation of the fan head (1) in a bending mode towards the front end; when the folding fan is folded, the fan head (1) is rotated into the first folding angle (201) through the rotating component, the telescopic rod (3) is contracted and can be unlocked by the locking rotating mechanism to enable the telescopic rod (3) to be forwards turned and stacked on the base (4), and the turning frame (2) is backwards turned through the first limiting rotating mechanism and enables the mesh cover (27) of the fan head (1) to be stacked on the telescopic rod (3).

2. A folding fan according to claim 1, wherein: 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 installed on the rotating seat (5), the fixed gear (8) is arranged at the bottom of the rotating seat (5) through a rotating column (501) in a rotating mode, an inserting cylinder (801) is arranged at the bottom of the fixed gear (8), an inserting hole (202) is formed in the top of the turnover frame (2), the inserting cylinder (801) is tightly embedded in the inserting hole (202), the motor (6) is arranged on the rotating seat (5), and the driving gear (7) meshed with the fixed gear (8) is connected to an output shaft (601) of the motor (6) in a driving mode.

3. A folding fan according to claim 2, wherein: the rotating seat (5) is provided with a reduction gear (12) between the driving gear (7) and the fixed gear (8) in a rotating mode, the reduction gear (12) comprises a large tooth portion (1201) with the top portion meshed with the driving gear (7) and a small tooth portion (1202) with the bottom portion meshed with the fixed gear (8), the diameter of the large tooth portion (1201) is larger than that of the driving gear (7), and the diameter of the small tooth portion (1202) is smaller than that of the fixed gear (8).

4. A folding fan according to claim 2, wherein: the rotating assembly further comprises a rotating limiting mechanism for limiting the rotating angle of the rotating base (5) to be-60-180 degrees, and the rotating limiting mechanism comprises 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 matched with the rotating clamping block (502) to enable the rotating base (5) to rotate and limit the rotating angle to be-60 degrees, and a second limiting block (804) matched with the rotating clamping block (502) to enable the rotating base (5) to rotate and limit the rotating angle to be 180 degrees.

5. A folding fan according to claim 2, wherein: rotate in post (501) integrated into one piece have the bottom to pass and insert a dress section of thick bamboo (801) and feed through the line pivot (10) of crossing that rotates roating seat (5) top and roll-over stand (2) inside, the bottom of crossing line pivot (10) is outer concave to be equipped with draw-in groove (1001), snap ring (11) that the top surface supported and inserts dress section of thick bamboo (801) bottom surface are blocked in draw-in groove (1001).

6. A folding fan according to claim 1, wherein: first spacing slewing mechanism includes first articulated post (3014), support arm (204), spacing groove (205) and first articulated shaft (22), first articulated post (3014) is connected in the top rear end of telescopic link (3), first articulated shaft (22) are fixed in on first articulated post (3014) through the bolt, the bottom of roll-over stand (2) has support arm (204) towards the rear end extension, the end cover of support arm (204) is established on first articulated shaft (22) and the bottom surface of support arm (204) rotate the top of butt telescopic link (3), the position that the bottom of support arm (204) corresponds first articulated post (3014) still is equipped with spacing groove (205) that hold first articulated post (3014), and its tank bottom rotates the preceding terminal surface of the first articulated post (3014) of butt.

7. A folding fan according to claim 1, wherein: the lockable rotating mechanism comprises a second limiting rotating mechanism and a locking mechanism, the second limiting rotating mechanism comprises a second hinge column (401), a hinge bottom cover (26) (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 (26) (303) is connected to the bottom of the telescopic rod (3) in an inserting mode, a hinge groove (3031) for accommodating the second hinge column (401) is concavely arranged at the front end of the hinge bottom cover, the second hinge shaft (23) penetrates through the hinge bottom cover (26) (303) and the second hinge column (401) on two sides of the hinge groove (3031), and the bottom of the hinge bottom cover (26) (303) is rotatably abutted to the top surface of the base (4); locking mechanism includes T type lockbolt (24) and lock nut (25), the rotatable bottom rear end of locating base (4) of T type lockbolt (24) and its locking end (2401) are passed by supreme down base (4), the rear end of base (4) bottom is concave to be equipped with the groove of dodging that forms T type lockbolt (24) wrench movement end rotation space, the position of locking end (2401) of corresponding T type lockbolt (24) in articulated bottom (26) (303) is located in lock nut (25), the bottom of articulated bottom (26) (303) is seted up and is used for locking end (2401) to pass and spiral shell and connect the locking hole of lockbolt.

8. A folding fan according to claim 1, wherein: the telescopic rod (3) comprises an upper pipe (301), a lower pipe (302) and a telescopic locking mechanism, the upper pipe (301) is slidably connected into the lower pipe (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 pipe (301), the bottom of the locking sleeve protrudes outwards along the radial direction to form a limiting convex part (1302) abutting against the inner wall of the lower pipe (302), one side of the locking sleeve (13) is provided with a button groove (1301), a guide hole (3011) is arranged at the position of the upper pipe (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 against the bottom of the locking button (14) and the bottom of the button groove (1301) and the inner wall of the top of the sliding button abutting against the lower pipe (302), the position that corresponds guiding hole (3011) in low tube (302) top is equipped with cooperation and exposes locking hole (3021) at slide button top, stop collar (16) connect in the top of low tube (302) and its top is along the radial inside protruding spacing ring portion (1601) that have butt upper tube (301) outer wall that has stretched.

9. A folding fan according to claim 1, wherein: telescopic link (3) are including top tube (301), low tube (302) and flexible stop gear, top tube (301) sliding connection is in low tube (302), flexible stop gear is including horizontal sliding chamber (17), locking slider (18), slider spring (19), locking fixture block (20), fixture block spring (21) and locking cover (13), one side at low tube (302) top is equipped with horizontal sliding chamber (17), locking slider (18) slide and locate in horizontal sliding chamber (17), slider spring (19) butt is between one side of locking slider (18) and horizontal sliding chamber (17), locking slider (18) are towards the uncovered locking chamber (1801) that is equipped with of outer wall of top tube (301), locking fixture block (20) slide through the locking spring and locate in locking chamber (1801) and the outer wall of butt top tube (301), the outer wall that top tube (301) correspond locking fixture block (20) is equipped with a plurality of locking fixture block locking card slot (3012) complex locking card slot (3012) ) The sliding-out end of the locking clamping block (20) is clamped in the locking clamping groove (3012), guide inclined planes (3013) are arranged on two sides and the bottom of the locking clamping groove (3012), the locking sliding block (18) is provided with a shifting block (1802) exposed out of the upper pipe (301), the locking sleeve (13) is inserted into the bottom of the upper pipe (301), and the bottom of the locking sleeve is radially and outwardly protruded with a limiting convex part (1302) abutting against the inner wall of the lower pipe (302).

10. A folding fan according to claim 3, wherein: the bottom of roating seat (5) is connected with and surrounds drive gear (7), fixed gear (8) and bottom (26) at reduction gear (12) top, first pivot (2601) and second pivot (2602) are worn to be equipped with respectively in the position that bottom (26) correspond driving gear and reduction gear (12) axle center hole, opening (2603) of dodging the cartridge (801) are seted up to the position that bottom (26) correspond speed reduction cartridge (801).