An electric fan

Abstract

The present invention relates to the technical field of household appliances, and in particular to electric fans. The electric fan provided by the present invention includes a supporting body, a fan head assembly rotatably connected thereto, and a fixing assembly. The fixing assembly can make the fan head assembly and the supporting body closely abut against each other and have static friction. When the force applied to the fan head assembly is balanced with the static friction, the fan head assembly and the supporting body are relatively fixed; when the force applied to the fan head assembly can overcome the static friction, the fan head assembly can rotate relative to the supporting body to perform a pitch motion. Compared with the electric fan in the prior art that sets a pitch drive motor to realize the pitch operation of the fan head assembly, the electric fan proposed by the present invention can realize the pitch operation of the fan head assembly by manually applying force to the fan head assembly, without the need to specially set up a pitch drive motor, and has a simple and compact structure and occupies a small space.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to an electric fan. Background Art

[0002] like Figure 1 As shown, the electric fan in the prior art includes a support assembly 1' and a fan head assembly 2'. A mounting frame 21' is provided on the inner side of the fan head assembly 2'. The support assembly 1' includes a base, a bracket vertical shaft 11' and a rotating bracket 12' which are connected in sequence from bottom to top. In order to realize the pitch movement of the fan head assembly 2' relative to the support assembly 1', a pitch drive motor 3' is provided on the mounting frame 21'. The output shaft of the pitch drive motor 3' extends out of the outer side of the mounting frame 21', and a first gear 4' is provided on the extended output shaft. A second gear 5' is fixedly provided on the rotating bracket 12'. The first gear 4' is meshed with the second gear 5'. A rotating shaft extends from one side of the second gear 5'. The mounting frame 21' is rotatably connected to the rotating shaft. The output shaft of the pitch drive motor 3' rotates to drive the first gear 4' to rotate relative to the second gear 5', so that the mounting frame 21' rotates relative to the rotating shaft, thereby achieving the pitch movement of the fan head assembly 2' relative to the support assembly 1'. When the pitch drive motor 3' stops working, the fan head assembly 2' and the support assembly 1' can maintain a certain pitch angle unchanged. However, in the electric fan of this structure, a pitch drive motor 3', a first gear 4' and a second gear 5' are required to achieve the pitch movement of the fan head assembly 2' relative to the support assembly 1', which makes the structure of the electric fan complicated on the one hand, and occupies a large space on the other hand, resulting in a large overall size of the electric fan.

[0003] Based on this, it is urgent to invent an electric fan with simple and compact structure and small space occupation. Summary of the invention

[0004] The purpose of the present invention is to provide an electric fan which can realize the pitching of a fan head assembly while having a simple and compact structure and occupying a small space.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] An electric fan comprises a supporting body and a fan head assembly rotatably connected thereto, and the electric fan further comprises:

[0007] A fixing assembly is provided so that static friction exists between the fan head assembly and the supporting body. When the force applied to the fan head assembly is balanced with the static friction, the fan head assembly and the supporting body are relatively fixed. When the fan head assembly is applied with an external force that can overcome the static friction, the fan head assembly can rotate relative to the supporting body to perform pitch motion.

[0008] Optionally, the fan head assembly includes a mesh cover and an inner cover arranged on the back of the mesh cover, the end of the support body is accommodated in the inner cover, and one of the end of the support body and the inner cover is protruding with a rotating shaft, and the other is rotatably connected to the rotating shaft.

[0009] Optionally, the fixing component is a nut, the rotating shaft is provided with a thread, and the nut is screwed on the thread.

[0010] Optionally, an elastic gasket is provided between the nut and the supporting body.

[0011] Optionally, the inner cover includes a detachably connected inner cover body and a first plate; the supporting body includes a detachably connected supporting body body and a second plate, one of the first plate and the second plate is protrudingly provided with the rotating shaft, and the other is rotatably connected to the rotating shaft.

[0012] Optionally, the support body extends into the fan head assembly, and a clearance groove is provided on the fan head assembly, and at least part of the support body is accommodated in the clearance groove. When the fan head assembly rotates relative to the support body to perform pitch motion, the support body can slide relatively along the clearance groove.

[0013] Optionally, a closing portion is formed at one end of the clearance groove, and when the fan head assembly rotates relative to the supporting body to perform a pitch motion to a preset angle, the closing portion abuts against the supporting body.

[0014] Optionally, the supporting body comprises:

[0015] Support vertical shaft; and

[0016] The rotary drive mechanism can rotate around the vertical axis of the bracket through its own driving, and the fan head assembly is rotationally connected to the rotary drive mechanism.

[0017] Optionally, the rotation drive mechanism is arranged in the inner cover.

[0018] Optionally, the rotation drive mechanism comprises:

[0019] A transmission mechanism, rotatably connected to the vertical shaft of the support;

[0020] The motor can drive the transmission mechanism to rotate around the vertical axis of the bracket, and the projection of the motor on the horizontal plane is located within the projection of the transmission mechanism on the horizontal plane.

[0021] The beneficial effects of the present invention are:

[0022] The electric fan provided by the present invention includes a supporting body, a fan head assembly rotatably connected thereto, and a fixing assembly. The fixing assembly can make the fan head assembly and the supporting body closely abut against each other and have static friction. When the force applied to the fan head assembly is balanced with the static friction, the fan head assembly and the supporting body are relatively fixed; when the force applied to the fan head assembly can overcome the static friction, the fan head assembly can rotate relative to the supporting body to perform a pitch motion. Compared with the electric fan in the prior art that sets a pitch drive motor to achieve the pitch operation of the fan head assembly, the electric fan provided by the present invention can achieve the pitch operation of the fan head assembly by manually applying force to the fan head assembly, without the need to specially set up a pitch drive motor, and has a simple and compact structure and occupies little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 It is a structural schematic diagram of an electric fan in the prior art;

[0025] Figure 2 It is a structural schematic diagram of the electric fan when the fan head assembly provided by the present invention is in a horizontal state;

[0026] Figure 3 It is a schematic diagram of the structure of the electric fan with the outer cover removed;

[0027] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0028] Figure 5 yes Figure 2 A partial enlarged view of point B in the middle;

[0029] Figure 6 It is a schematic diagram of the structure in which the first plate and the second plate provided by the present invention are in a parallel state;

[0030] Figure 7 yes Figure 6 An exploded view of the structure shown;

[0031] Figure 8 is a top view of the first plate, the second plate, the nut and the rotary drive mechanism provided by the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the elastic gasket provided by the present invention in one direction;

[0033] Fig.10It is a schematic structural diagram of the elastic gasket provided by the present invention in another direction;

[0034] Fig.11 yes Figure 8 Sectional view of the CC section;

[0035] Fig.12 It is a structural schematic diagram of the electric fan provided by the present invention when the fan head assembly is tilted upward at 45 degrees;

[0036] Fig.13 It is a schematic diagram of the structure where the first plate and the second plate provided by the present invention are at 45 degrees;

[0037] Fig.14 It is a structural schematic diagram of the electric fan provided by the present invention when the fan head assembly is tilted upward by 90°;

[0038] Fig.15 It is a schematic diagram of the structure in which the first plate and the second plate provided by the present invention are at 90 degrees.

[0039] The following are marked in the figure:

[0040] 1'-support body; 2'-fan head assembly; 3'-pitch drive motor; 4'-first gear; 5'-second gear;

[0041] 11'- bracket vertical axis; 12'- rotating bracket; 21'- mounting bracket;

[0042] 1-support body; 2-fan head assembly; 3-nut; 4-elastic gasket; 5-first stop gasket; 6-second stop gasket;

[0043] 11-second plate; 12-support vertical axis; 13-rotation drive mechanism; 14-base; 15-limiting protrusion; 21-front mesh cover; 22-fan head; 23-rear mesh cover; 41-convex surface; 42-concave surface;

[0044] 111-rotating shaft; 131-transmission mechanism; 132-motor; 221-inner cover; 222-rear cover;

[0045] 1111-thread; 1311-first bearing; 1312-second bearing; 1313-housing; 1314-first gear; 1315-second gear; 2211-inner cover body; 2212-first plate; 2213-first clearance groove; 2221-second clearance groove;

[0046] 13111-first inner ring; 13112-first outer ring; 13113-first ball; 13121-second inner ring; 13122-second outer ring; 13123-second ball; 22211-closing part. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the technical solution of this embodiment, the technical solution of this embodiment is further described below with reference to the accompanying drawings and through specific implementation methods.

[0048] like Figure 2 As shown, the electric fan provided in this embodiment includes a supporting body 1 and a fan head assembly 2. During the use of the electric fan, the fan head assembly 2 can make a pitching motion in the vertical direction relative to the supporting body 1, so as to achieve blowing at different positions in the vertical direction. Wherein, the fan head assembly 2 includes a front mesh cover 21 and a rear mesh cover 23 that are interlocked, and the front mesh cover 21 and the rear mesh cover 23 form a accommodating space, which is used to accommodate a fan blade (not shown in the figure), and a fan head 22 is arranged at the rear of the rear mesh cover 23, and a fan blade drive motor (not shown in the figure) is arranged in the fan head 22, and the fan blade drive motor can drive the fan blade to rotate. The fan head 22 includes a rear cover 222 arranged at the outermost side, and the open end of the rear cover 222 is fixed to the rear end of the rear mesh cover 23, and the interior of the rear cover 222 is used to accommodate various motors, circuit boards, wires, etc., to prevent the leakage of motors, circuit boards, wires, etc., and ensure the aesthetics of the overall appearance of the electric fan. The support body 1 includes a base 14 and a support shaft 12 connected in sequence from bottom to top. The support shaft 12 is in the shape of a rod, and its end extends into the interior of the fan head 22 and is connected to the fan head 22. The fan head 22 can make a pitch motion relative to the support shaft 12. The base 14 is in the shape of a disc and is arranged at the bottom of the support shaft 12. It can play a good supporting role for the support shaft 12 and the fan head assembly 2, and prevent the electric fan from being deflected during operation.

[0049] Figure 1The figure is a schematic diagram of the structure of an electric fan in the prior art. The electric fan in the prior art needs to be provided with a pitch drive motor 3', a first gear 4' and a second gear 5' to realize the pitch movement of the fan head assembly 2' relative to the support assembly 1'. On the one hand, the structure of the electric fan is complicated. On the other hand, the pitch drive motor 3', the first gear 4' and the second gear 5' take up a large space, resulting in a large overall size of the electric fan. In order to solve the above problems, the support body 1 provided in this embodiment is rotatably connected with the fan head assembly 2. The electric fan also includes a fixing assembly. The fixing assembly enables static friction between the fan head assembly 2 and the support body 1. When the force applied to the fan head assembly 2 is balanced with the static friction, the fan head assembly 2 is relatively fixed to the support body 1; when the force applied to the fan head assembly 2 can overcome the static friction, the fan head assembly 2 can rotate relative to the support body 1 to perform pitch movement. Compared with the electric fan of the prior art, the electric fan in this embodiment can realize the pitch operation of the fan head assembly 2 by manually applying force to the fan head assembly 2, without the need to specially set up a pitch drive motor 3', and its structure is simple and compact, and occupies a small space. Specifically, when the fan head assembly 2 is not subjected to external force, the gravity of the fan head assembly 2 and the static friction force are balanced, and the fan head assembly 2 and the support body 1 are relatively fixed; when the fan head assembly 2 is subjected to external force: the force on the fan head assembly 2 includes its own gravity and the external force, when the combined force of gravity and external force is balanced with the static friction force, the fan head assembly 2 and the support body 1 are relatively fixed; when the combined force of gravity and external force can overcome the static friction force, the fan head assembly 2 can rotate relative to the support body 1 to perform pitch movement.

[0050] Figure 3 2 is a schematic diagram of the structure of the electric fan provided in this embodiment without the rear cover 222. Figure 3 As shown, an opening is formed at one end of the inner cover 221, and the edge of the opening is fixedly connected to the back of the rear mesh cover 23. The end of the support body 1 is accommodated in the inner cover 221. The two sides of the end of the support body 1 are respectively provided with rotating shafts 111, and the inner cover 221 is respectively rotatably connected to the rotating shafts 111 on both sides, so that the pitching movement of the fan head assembly 2 relative to the support assembly 1 can be achieved. In other embodiments, the rotating shaft 111 can also be extended to one side of the end of the support body 1; the rotating shaft can also be set on the inner cover 221, and the end of the support body 1 is rotatably connected to the rotating shaft, which can also achieve the rotation connection between the inner cover 221 and the support body 1.

[0051] Specifically, the fixing component in this embodiment is a nut 3 , a thread 1111 is provided on the rotating shaft 111 , and the nut 3 is screwed on the thread 1111 to tightly abut the fan head component 2 against the supporting body 1 along the axial direction of the rotating shaft 111 .

[0052] In order to facilitate the assembly of various parts of the electric fan, the inner cover 221 provided in this embodiment includes a detachably connected inner cover body 2211 and a first plate 2212. The specific installation method is: the operator first installs the end of the support body 1 into the inner cover body 2211, so that the shaft 111 extends out of the inner cover body 2211; then the first plate 2212 is inserted into the shaft 111, and the nut 3 is screwed onto the thread 1111, so that the first plate 2212 abuts against the support body 1; finally, the end of the first plate 2212 not connected to the shaft 111 is fixed to the inner cover body 2211 by screws.

[0053] also, Figure 4 yes Figure 3 The local enlarged view of A in the middle, combined with Figure 3 and Figure 4 In this embodiment, a first clearance groove 2213 is provided at the lower part of the back side of the inner cover body 2211, and at least a part of the support body 1 is accommodated in the first clearance groove 2213. When the fan head assembly 2 makes a pitch motion relative to the support body 1, the support body 1 can slide relatively along the clearance groove to avoid interference between the inner cover body 2211 and the support body 1, thereby ensuring that the fan head assembly 2 makes a pitch motion relative to the support body 1 smoothly.

[0054] Figure 5 yes Figure 2 The local enlarged view of point B in the figure is as follows: Figure 5As shown, the rear cover 222 is provided with a second clearance groove 2221 corresponding to the position of the first clearance groove 2213 (not shown in the figure), and at least part of the support body 1 is accommodated in the second clearance groove 2221. When the fan head assembly 2 makes a pitching motion relative to the support body 1, the support body 1 can slide relatively along the second clearance groove 2221 to avoid interference between the rear cover 222 and the support body 1, thereby ensuring that the fan head assembly 2 makes a pitching motion relative to the support body 1 smoothly. In addition, a closed portion 22211 is formed at one end of the second clearance groove 2221. When the fan head assembly 2 makes a pitching motion relative to the support body 1 to the extreme position (preset angle), the closed portion 22211 abuts against the support body 1 to limit the continued rotation of the fan head assembly 2 relative to the support body 1. It can avoid excessive pulling of the internal wires of the fan head assembly 2 due to excessive rotation of the fan head assembly 2, prevent leakage caused by the wires being torn off, and ensure the normal operation of the circuit in the fan head assembly 2. Exemplarily, when the fan head assembly 2 rotates to the point where the front mesh cover 21 faces upward and the front mesh cover 21 is perpendicular to the support shaft 12, the closing portion 22211 abuts against the support body 1, which can prevent the fan head assembly 2 from continuing to rotate in the upward direction relative to the support shaft 12. In other embodiments, the limit position of the rotation of the fan head assembly 2 can also be set to other positions. When the fan head assembly 2 is in a horizontal state, the axis of the front mesh cover 21 is 90° to the axis of the support shaft 12. When the fan head assembly 2 rotates upward by a certain angle, it is located on the same side of the axis of the support shaft 12 as when it is in a horizontal state. The limit position of the rotation of the fan head assembly 2 can be set to the point where the axis of the front mesh cover 21 is 10°, 20° or other degrees less than 90° to the axis of the support shaft 12.

[0055] like Figure 6 As shown, the support body 1 provided in this embodiment includes a detachably connected support body and a second plate 11, a rotating shaft 111 is convexly provided on the second plate 11, and the first plate 2212 is rotatably connected to the rotating shaft 111. Since the first plate 2212 and the second plate 11 are both plate-shaped, when the nut 3 is screwed on the rotating shaft 111, the nut 3 can make the first plate 2212 and the second plate 11 closely abut along the axial direction of the rotating shaft 111, so as to realize the surface-to-surface contact between the fan head assembly 2 and the support body 1. When the fan head assembly 2 is not subjected to external force, it can effectively ensure that the fan head assembly 2 does not rotate relative to the support body 1. Specifically, the second plate 11 can be fixed on the support body by fasteners such as screws. In addition, a limiting protrusion 15 is provided on the support body, and a limiting hole is provided on the second plate 11. By inserting the limiting protrusion 15 into the limiting hole, the second plate 11 can be quickly and accurately installed on the support body, thereby improving the installation efficiency of the second plate 11. In other embodiments, a limiting protrusion may be provided on the second plate 11, and a limiting hole may be opened on the supporting body, so as to achieve a quick installation effect.

[0056] In addition, while the fan head assembly 2 can be pitched relative to the support body 2 in the vertical direction, in order to adjust the relative position of the fan head assembly 2 relative to the support body 1 in the circumferential direction, the support body body in this embodiment includes a base 14, a bracket vertical shaft 12 and a rotation drive mechanism 13 connected in sequence from bottom to top, wherein the rotation drive mechanism 13 can rotate around the bracket vertical shaft 12 by its own driving energy, and the second plate 11 is installed on the rotation drive mechanism 13. The rotation drive mechanism 13 can drive the fan head assembly 2 connected thereto to rotate 360° around the bracket vertical shaft 12 by its own driving energy, thereby expanding the blowing range of the electric fan in the circumferential direction. For example, the blowing range of a traditional electric fan will not be greater than 120°, and the blowing range is limited. When there are many people in the room, it is impossible to take into account all people, but the blowing range of the electric fan in this embodiment is 360° in the circumferential direction, which can take into account all people in the room. In addition, in order to make full use of the space of the inner cover 221 and make the arrangement of the various parts of the electric fan more compact, the rotation drive mechanism 13 in this embodiment is arranged in the inner cover 221.

[0057] Specifically, if Figures 6 to 8 As shown, the rotary drive mechanism 13 in this embodiment includes a transmission mechanism 131 and a motor 132. The transmission mechanism 131 is rotatably connected to the bracket vertical shaft 12. The motor 132 can drive the transmission mechanism 131 to rotate relative to the bracket vertical shaft 12. The projection of the motor 132 on the horizontal plane is located within the projection of the transmission mechanism 131 on the horizontal plane, which can make the rotary drive mechanism 13 occupy a smaller space in the horizontal direction. Since the fan head 22 is cylindrical as a whole, the volume of the fan head 22 can be effectively reduced, and the space occupied by the whole fan can be reduced. If the motor 132 extends out of the transmission mechanism 131 in the horizontal direction, the diameter of the fan head 22 must be enlarged, which is not conducive to reducing the volume of the fan head 22.

[0058] In addition, the operator will rotate the fan head assembly 2 upward from the horizontal state in the vertical direction. In this embodiment, the motor 132 is arranged above the transmission mechanism 131. When the fan head assembly 2 is tilted upward, the motor 132 will be located in the space of the inner cover 221 close to its opening, that is, there is no need to set up too much space at the tail of the inner cover 221, which can effectively reduce the volume of the electric fan. If the motor 132 is arranged below the transmission mechanism 131, when the fan head assembly 2 is tilted upward, in order to avoid the motor 132, a certain space needs to be reserved at the tail of the inner cover 221, resulting in a larger length of the inner cover 221, that is, the space occupied by the inner cover 221 is larger.

[0059] Since the first plate 2212 and the second plate 11 are tightly abutted by the locking of the nut 3 in this embodiment, if the pitch adjustment of the fan head assembly 2 is performed too many times, the first plate 2212 and the second plate 11 will be worn to a certain extent, resulting in the first plate 2212 and the second plate 11 not being tightly abutted enough, and the fan head assembly 2 will droop under the action of gravity. Figure 7 and Figure 8 As shown, an elastic gasket 4 can be arranged between the fixed assembly and the supporting body 1. When the electric fan is initially installed, the elastic gasket 4 is squeezed along the axial direction of the rotating shaft 111. Even if the first plate 2212 and the second plate 11 are worn out later, the compressed elastic gasket 4 can restore a part of the deformation along the axial direction of the rotating shaft 111. When the fan head assembly 2 is in a state of no external force, the first plate 2212 and the second plate 11 can always be pressed tightly along the axial direction of the rotating shaft 111, thereby ensuring that the fan head assembly 2 and the supporting body 1 are always relatively fixed, and avoiding the drooping phenomenon of the fan head assembly 2.

[0060] Specifically, Fig. 9 and Fig.10 Schematic diagram of the structure of the elastic gasket provided in this embodiment. Fig. 9 and Fig.10 As shown, this embodiment includes two elastic gaskets 4, which are sandwiched between the first plate 2212 and the second plate 11, wherein the elastic gasket 4 is a curved plate made of metal, and the elastic gasket 4 can support the flat plate through a bulging or stamping process, and the elastic gasket 4 includes a convex surface 41 and a concave surface 42 arranged oppositely along the axial direction. After the nut 3 is locked onto the rotating shaft 111, the elastic gasket 4 is compressed by the nut 3 and the first plate 2212 along the axial direction. When the elastic gasket 4 is worn, a part of the compressed amount of the elastic gasket 4 can be released, so that the first plate 2212 and the second plate 11 are always in a close contact state. In addition, in other embodiments, the elastic gasket 4 can be made of an elastically deformable material, and the elastic gasket 4 can be compressed when under pressure, that is, it can be elastically deformed in the axial direction of the rotating shaft 111. In other embodiments, the elastic gasket 4 may also be arranged between the first plate 2212 and the second plate 11; or a part of the elastic gasket 4 may be arranged between the first plate 2212 and the second plate 11, and the other part may be arranged between the first plate 2212 and the nut 3.

[0061] In addition, a first stop washer 5 may be sandwiched between the nut 3 and the elastic washer 4, and a second stop washer 6 may be sandwiched between the elastic washer 4 and the second plate 11. The holes on the first stop washer 5 and the second stop washer 6 are non-circular, and the first plate 2212 and the nut 3 may be separated by the first stop washer 5 and the second stop washer 6. Since the first stop washer 5 and the second stop washer 6 will not rotate relative to the shaft, even if the first plate 2212 rotates relative to the shaft 111, the nut 3 can be prevented from rotating and from loosening from the shaft 111, thereby ensuring safe and normal use of the electric fan.

[0062] Fig.11 yes Figure 7 A cross-sectional view of the structure shown, such as Fig.11 As shown, the transmission mechanism 131 in this embodiment includes a housing 1313, a first gear 1314, a second gear 1315, a first bearing 1311 and a second bearing 1312, wherein the first bearing 1311 includes a first inner ring 13111, a first outer ring 13112 and a first ball 13113, and the second bearing 1312 includes a second inner ring 1312, a second outer ring 1313 and a second ball 1314. The housing 1313 is fixedly connected to the second plate 11, the main body of the motor 132 is fixed to the outside of the housing 1313, the first gear 1314 and the second gear 1315 are both arranged in the cavity of the housing 1313, the output shaft of the motor 132 is coaxially fixed with the first gear 1314, the second gear 1315 is coaxially fixed with the bracket vertical shaft 12, and the second gear 1315 is meshed and arranged on one side of the first gear 1314. The first bearing 1311 and the second bearing 1312 are arranged at intervals, and the inner ring of the first bearing 1311 and the inner ring of the second bearing 1312 are respectively fixedly sleeved on the bracket vertical shaft 12, and the outer shell 1313 is fixed to the outer ring of the first bearing 1311 and the outer ring of the second bearing 1312.

[0063] The working principle of the rotary drive mechanism 13 in this embodiment is as follows: the motor 132 drives the first gear 1314 to rotate, and since the second gear 1315 and the bracket shaft 12 are fixed, the first gear 1314 revolves around the second gear 1315. Since the housing 1313 is fixed on the motor 132, and the housing 1313 and the bracket shaft 12 are rotatably connected through the first bearing 1311 and the second bearing 1312, the housing 1313 rotates around the bracket shaft 12 together with the first gear 1314, and the rotary drive mechanism 13 drives the fan head assembly 2 to rotate 360 ​​degrees relative to the bracket shaft 12.

[0064] In addition, the first inner ring 13111 of the first bearing 1311 is electrically connected to the negative pole of the power supply, the second inner ring 1312 of the second bearing 1312 is electrically connected to the positive pole of the power supply, and the first outer ring 13112 of the first bearing 1311 and the second outer ring 1313 of the second bearing 1312 are electrically connected to the circuit board respectively, so that a power supply circuit can be formed between the power supply and the circuit board. The circuit board is externally connected to the first power component, the second power component, etc., so that the power supply to the first power component and the second power component, etc. can be realized. Since the outer rings of the first bearing 1311 and the second bearing 1312 are less worn when they rotate relative to their respective inner rings, the fan head assembly 2 is rotated 360° relative to the bracket vertical shaft 12, while ensuring the power supply stability of each power component. Specifically, the power component in this embodiment can be a motor for rotating the fan blades in the fan head assembly 2, or a control motor for adjusting the wind speed, or a motor 132, etc. In other embodiments, the number of power components is not limited to two groups, but can also be three, four or more groups, and different settings can be made according to different models.

[0065] In addition, in order to prevent the entire power-on circuit from short-circuiting and ensure stable power-on, the first bearing 1311 and the second bearing 1312 may be spaced apart. In order to further prevent the occurrence of short-circuiting, an insulating partition is provided between the first bearing 1311 and the second bearing 1312, and the insulating partition is sleeved on the outer periphery of the bracket vertical shaft 12. Even if the first bearing 1311 slides down under the action of gravity, the occurrence of short-circuiting can be effectively prevented. Specifically, the insulating partition in this embodiment may be made of insulating and flame-retardant materials such as PA6 (polyamide 6).

[0066] In order to facilitate the understanding of the electric fan provided in this embodiment, Figure 3 , Figure 6 , Figure 12 to Figure 15 Next, the pitch motion adjustment of the electric fan will be described.

[0067] When the fan head assembly 2 is in a horizontal state, Figure 3 As shown, the axial direction of the fan head assembly 2 is parallel to the horizontal plane. In this state, the relative position relationship between the first plate 2212 and the second plate 11 is as shown in FIG. Figure 6 shown.

[0068] When the user feels that the fan's air outlet position is too low, such as Fig.12 As shown, the user can rotate the fan head assembly 2 upward by 45°, so as to obtain air outlet slightly above. In this state, the relative position relationship between the first plate 2212 and the second plate 11 is as shown in FIG. Fig.13 shown.

[0069] Wall-mounted air conditioners are generally located at a relatively high position, so the exhausted cold air or hot air is concentrated at the upper position of the room, which is not conducive to the circulation of cold air or hot air in the room in the vertical direction, and it takes a long time for the room to reach a uniform temperature at various positions. As shown in Figure 14, the user can rotate the fan head assembly 2 upward by 45 degrees so that the front mesh cover 21 faces the roof, so that the cold air and hot air at the upper position of the room can be quickly circulated throughout the room, so that the temperature at various positions in the room along the vertical direction can be quickly reached. The relative position relationship between the first plate 2212 and the second plate 11 in this state is shown in Figure 14. Fig.15 shown.

[0070] Note that the above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. An electric fan, comprising a supporting body (1) and a fan head assembly (2) rotatably connected thereto, characterized in that: The electric fan also includes: A fixing assembly is provided so that static friction exists between the fan head assembly (2) and the supporting body (1); when the force applied to the fan head assembly (2) is balanced with the static friction, the fan head assembly (2) and the supporting body (1) are relatively fixed; when the force applied to the fan head assembly (2) is able to overcome the static friction, the fan head assembly (2) can rotate relative to the supporting body (1) to perform a pitching motion; The fan head assembly (2) comprises a mesh cover and an inner cover (221) arranged on the back of the mesh cover, and the end of the support body (1) is accommodated in the inner cover (221); The support body (1) comprises a base (14) and a support shaft (12) which are connected in sequence from bottom to top; the base (14) is disc-shaped and is arranged at the bottom of the support shaft (12); the support shaft (12) extends into the fan head assembly (2); a clearance groove is provided on the fan head assembly (2); at least a part of the support shaft (12) is accommodated in the clearance groove; when the fan head assembly (2) rotates relative to the support body (1) to make a pitching motion, the support body (1) can slide relatively along the clearance groove.

2. The electric fan according to claim 1, characterized in that: A rotating shaft (111) is protruded from one of the end of the supporting body (1) and the inner cover (221), and the other is rotatably connected to the rotating shaft (111).

3. The electric fan according to claim 2, characterized in that: The fixing component is a nut (3), the rotating shaft (111) is provided with a thread (1111), and the nut (3) is screwed onto the thread (1111).

4. The electric fan according to claim 3, characterized in that: An elastic gasket (4) is provided between the nut (3) and the supporting body (1).

5. The electric fan according to claim 2, characterized in that: The inner cover (221) comprises a detachably connected inner cover body (2211) and a first plate (2212); the support body (1) comprises a detachably connected support body body and a second plate (11), the rotating shaft (111) being protrudingly provided on one of the first plate (2212) and the second plate (11), and the other being rotatably connected to the rotating shaft (111).

6. The electric fan according to claim 1, characterized in that: A closed portion is formed at one end of the clearance groove, and when the fan head assembly (2) rotates relative to the support body (1) to perform a pitch motion to a preset angle, the closed portion abuts against the support body (1).

7. The electric fan according to any one of claims 2 to 6, characterized in that: The supporting body (1) comprises: The rotary drive mechanism (13) can rotate around the bracket vertical shaft (12) through its own driving force, and the fan head assembly (2) is rotationally connected to the rotary drive mechanism (13).

8. The electric fan according to claim 7, characterized in that: The rotary drive mechanism (13) is arranged in the inner cover (221).

9. The electric fan according to claim 8, characterized in that The rotary drive mechanism (13) comprises: A transmission mechanism (131) is rotatably connected to the bracket vertical shaft (12); The motor (132) can drive the transmission mechanism (131) to rotate around the bracket vertical axis (12), and the projection of the motor (132) on the horizontal plane is located within the projection of the transmission mechanism (131) on the horizontal plane.

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