Oscillating structure and fan

Abstract

The utility model discloses an oscillating head structure and fan relates to fan technical field, wherein the oscillating head structure includes crank and oscillating head link, crank has connecting end, the end face of connecting end is provided with a plurality of buckle along the circumference interval, a deformation space is defined by a plurality of buckle, the buckle part of the buckle protrudes towards one side deviating from the deformation space; a connecting ring is arranged at one end of the oscillating connecting rod and at least arranged on the outer sides of the buckles in a sleeving mode, and the buckle part of each buckle is buckled to the side, away from the end face of the connecting end, of the connecting ring. According to the technical scheme, the assembling process of the crank and the oscillating connecting rod is simplified, the quality problem caused by improper assembling is reduced by optimizing the connecting mode, the overall performance of the electric fan is improved, and the service life of the electric fan is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a kind of head structure and fan. BACKGROUND

[0002] To realize the left and right swing of electric fan head, thereby expand air supply range, the head structure of existing electric fan is mostly four connecting rods mechanism, wherein the connecting mode of crank and connecting rod is generally that connecting rod is sleeved into the rotating shaft provided on crank, the radial movement track of connecting rod is constrained, to avoid that connecting rod is taken out of rotating shaft, generally need to use a enlarged washer head screw to be axially locked.This connecting mode, under the influence of screwdriver force, production is difficult to achieve consistent tightness, often appear too tight to lead to head jam, failure and other adverse conditions. SUMMARY

[0003] The main purpose of the utility model is to propose a kind of head structure and fan, the connecting mode of existing connecting rod and crank, rocker may exist the problem of inconsistent tightness, need to optimize connection mode to improve assembly accuracy and stability.

[0004] To achieve the above-mentioned purpose, the utility model provides a kind of head structure, comprising:

[0005] Crank, including connecting end, the end face of the connecting end is provided with a plurality of buckles along the circumferential direction interval, a plurality of the buckle is surrounded and formed with deformation space, the buckle is buckled to the side away from the deformation space The buckle portion protrudes from the side; and

[0006] Head connecting rod, one end of the head connecting rod is provided with connecting ring, the connecting ring is at least sleeved outside the plurality of buckles, and the buckle portion of each buckle is buckled to the side away from the end face of the connecting end The connecting ring.

[0007] In an embodiment, the buckling amount of the buckle and the connecting ring is 0.2mm-3mm.

[0008] In an embodiment, the outer surface of the buckle is provided with a guide surface, and the guide surface is inclined from the buckle portion to the connecting end and away from the deformation space.

[0009] In an embodiment, the crank is a plastic part.

[0010] In an embodiment, the number of the plurality of buckles is two to six.

[0011] In an embodiment, the outer side of the connecting end is recessed to form a plurality of structure grooves, and one structure groove corresponds to one buckle, and the structure groove extends to the buckle portion.

[0012] In an embodiment, the deformation space is detachably mounted with an abutting anti-disengagement piece, at least part of the abutting anti-disengagement piece is beyond the end surface of the connecting end and is placed in the deformation space, and the side of the buckle away from the buckle part abuts against the abutting anti-disengagement piece.

[0013] In an embodiment, the abutting anti-disengagement piece is configured as a screw, the connecting end is provided with a screw hole communicating with the deformation space, and the screw is screwed with the screw hole.

[0014] In an embodiment, the connecting end is hollow, and the rocker structure further comprises a stud provided in the hollow of the connecting end, the stud is provided with a screw hole, and the screw is screwed with the stud.

[0015] In an embodiment, the end surface of the connecting end is further convexly provided with a mounting section, and the connecting ring is sleeved outside the plurality of buckles and outside the mounting section.

[0016] In an embodiment, the mounting section is provided with a plurality of mounting sections, a plurality of gaps are formed between the plurality of buckles, one of the mounting sections is arranged in one of the gaps, a plurality of mounting sections are annularly arranged on the end surface of the connecting end, and the outer side of the mounting section forms a limiting step with the end surface of the connecting end, and the limiting step limits the connecting ring together with the plurality of buckles.

[0017] The utility model also proposes a fan, including main motor and as above described's rocker structure, main motor's support shaft is inserted into the other end of rocker connecting rod.

[0018] The technical scheme of the utility model realizes the connection of the crank and the rocker connecting rod through the innovative clamping mode, ensures that the connecting rod can stably and flexibly swing following the rotation of the crank, and solves the problem that the tightness of the existing connecting mode of the connecting rod, the crank and the rocker may be inconsistent. One end of the rocker connecting rod is provided with a connecting ring, the crank has a connecting end, a plurality of buckles are arranged on the end surface of the connecting end at intervals, the plurality of buckles annularly form a deformation space, so that the connecting ring passes through the buckles, the connecting ring is at least sleeved outside the plurality of buckles, the buckle part of each buckle is buckled on the side of the connecting ring away from the end surface of the connecting end, and the plurality of buckles play a role of limiting the connecting ring from disengaging from the mounting groove after the connecting ring is sleeved into the mounting groove, which not only ensures the stability of the connection, but also facilitates assembly and disassembly. This clamping connection mode simplifies the assembly process, optimizes the connection mode, reduces quality problems caused by improper assembly, and improves the overall performance and service life of the electric fan. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0020] Figure 1 The head-rotating structure provided by the present application is applied to a structural schematic diagram of an embodiment of a fan.

[0021] Figure 2 The head-rotating structure provided by the present application is applied to a structural schematic diagram of an embodiment of a fan. Figure 1

[0022] The head-rotating structure provided by the present application is applied to a structural schematic diagram of an embodiment of a fan. Figure 3 Figure 2 The head-rotating structure provided by the present application is applied to a structural schematic diagram of an embodiment of a fan.

[0023] Figure 4 The head-rotating structure provided by the present application is applied to a structural schematic diagram of an embodiment of a fan.

[0024] Figure 5 The head-rotating structure provided by the present application is applied to a structural schematic diagram of an embodiment of a fan.

[0025] Explanation of the drawing numbers:

[0026] 100, crank; 110, connecting end; 111, structural groove; 120, buckle; 121, deformation space; 122, buckling part; 123, guide surface; 130, abutting anti-disengagement piece; 131, screw; 140, stud; 141, screw hole; 150, mounting section; 160, limiting step; 200, head-rotating connecting rod; 210, connecting ring.

[0027] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0029] ​It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, if the certain posture changes, the directionality indication also changes accordingly.

[0030] In addition, if the embodiments of the utility model have descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, for example, "A and / or B" includes A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the utility model.

[0031] In order to realize the left and right swing of the head of the electric fan, thereby expanding the air supply range, the existing electric fan head structure is mostly a four-bar linkage mechanism, wherein the connection mode of the crank and the connecting rod is generally to sleeve the connecting rod into the rotating shaft provided on the crank, and the radial movement track of the connecting rod is constrained, in order to avoid the connecting rod from being taken out of the rotating shaft, it is usually necessary to use a large washer head screw to lock in the axial direction. This connection mode is affected by the force of the screwdriver, and it is difficult to produce consistent tightness, and the head is often locked too tightly, resulting in jamming and failure of the head.

[0032] At the same time, in order to avoid direct friction between metals, a plastic gasket is generally added between the screw and the connecting rod, increasing the assembly difficulty. The whole scheme has high requirements for production process and tools, and the assembly is complex and the quality is unstable.

[0033] The utility model provides a kind of head structure.

[0034] Please refer to Figures 1 to 5 In an embodiment of the utility model, the head structure is applied to fan, realizes the left and right swing of the head of the electric fan, thereby expands the air supply range, and the head structure includes crank 100 and head connecting rod 200.

[0035] The head structure of the electric fan is swung by the following steps:

[0036] Motor drive: the motor drives the crank 100 to rotate through rotating shaft.

[0037] Connecting rod transmission: the rotation of the crank 100 is transmitted to the swing connecting rod 200 through the connecting rod, so that the swing connecting rod 200 swings within a certain angle.

[0038] Fan head swinging: the swinging of the swing connecting rod 200 further drives the left and right swinging of the electric fan head, realizing the expansion of the air supply range.

[0039] With reference to Figures 1 to 5 , the crank 100 comprises a connecting end 110, a plurality of buckles 120 are arranged on the end face of the connecting end 110, the plurality of buckles 120 are arranged to form a deformation space 121, and the buckle part 122 of the buckle 120 protrudes away from the deformation space 121; a mounting groove is formed between the plurality of buckles 120 and the end face of the connecting end 110; the connecting end 110 is in a cylindrical shape, the crank 100 is usually connected with the motor end, the connecting end 110 is connected with the swing connecting rod, and the buckle 120 can be two and arranged on the end face at intervals, or three, four, five, six or the like, the plurality of buckles 120 are like "clips", the deformation space 121 ensures that the plurality of buckles 120 can be close to each other to deform, one end of the swing connecting rod 200 is provided with a connecting ring 210, when the connecting ring 210 is clamped into the mounting groove, the connecting ring 210 will make the plurality of buckles 120 close to the deformation space 121 through the buckle part 122, so that the connecting ring 210 can be limited by the buckle part 122 of the buckle 120 and separated along the axial direction, and the connecting ring 210 of the swing connecting rod is mounted on the connecting end 110 of the crank.

[0040] Specifically, the buckle 120 comprises a rod segment arranged on the end face of the connecting end 110 and a buckle part 122 arranged on the rod segment, and the hook part of the buckle part 122 is away from the deformation space 121; the rod segment and the buckle part 122 are like "7", the inner diameter of the connecting ring 210 is greater than the inner diameter of the space surrounded by the plurality of rod segments, and the connecting ring 210 can move flexibly among the plurality of rod segments, so that the swing connecting rod 200 can swing to follow the rotation of the crank 100 and further drive the left and right swinging of the electric fan head, and the buckle part 122 ensures that the connecting ring 210 will not separate from the crank 100 along the axial direction in the movement process.

[0041] The technical scheme of the utility model discloses that the crank 100 and the swing connecting rod 200 are connected through an innovative clamping mode, so that the connecting rod can stably and flexibly swing to follow the rotation of the crank 100, thereby solving the problem that the tightness of the connecting mode of the existing connecting rod, crank 100 and swing rod is inconsistent.

[0042] The clamping connection simplifies the assembly process, reduces quality problems caused by improper assembly through optimization of the connection mode, and improves the overall performance and service life of the electric fan.

[0043] The swing structure is suitable for various types of electric fans and has broad market application prospects.

[0044] The clamping amount affects the stability and durability of the structure. Specifically, the clamping amount of the buckle 120 and the connecting ring 210 is 0.2mm-3mm. By selecting a relatively precise range, it is ensured that the swing structure can be firmly connected and can also adapt to slight errors in the manufacturing and assembly process to some extent.

[0045] It can be understood that the material used for the buckle 120 and the connecting ring 210 has an important influence on the selection of the clamping amount. The performance differences such as hardness and elastic modulus of different materials will lead to different clamping effects. The clamping amount in the range of 0.2mm-3mm can provide sufficient fastening force to ensure that the swing structure will not loosen or fall off during operation; and can accommodate a certain degree of manufacturing and assembly errors, making the swing structure easier to assemble and adjust. The clamping amount of the buckle 120 and the connecting ring 210 is 0.2mm-3mm, which is a carefully designed choice, aiming to ensure the stability and durability of the electric fan swing structure. However, in actual application, appropriate adjustments and optimizations can be made according to specific use requirements and manufacturing process conditions.

[0046] The buckle 120 is like a "7" shaped clasp. The outer surface of the buckle 120 is provided with a guide surface 123, the inclination direction of the guide surface 123 is gradually inclined downward from the edge of the buckle 120 and away from the deformation space 121; the outer periphery surface formed by the plurality of guide surfaces 123 is gradually expanded along the sleeving direction; the outer periphery surface formed by the plurality of guide surfaces 123 is gradually expanded along the sleeving direction, the guide surface 123 plays a guiding role in the sleeving process of the connecting ring 210, ensuring that the connecting ring 210 can be smoothly slid into the mounting groove, and the gradually expanding outer periphery surface can also provide a certain elastic deformation space, so that the buckle 120 can be elastically deformed slightly when stressed, thereby increasing the tightness and stability of the connection, and making the assembly process smoother.

[0047] Specifically, the crank 100 is a plastic part; the swing connecting rod 200 is also a plastic part; the production cost is reduced. In other schemes, it can also be made of sheet metal and other materials.

[0048] Referring to Figures 2 to 5In specific embodiments, the buckles 120 include four, four buckles 120 are arranged at intervals around the end face of the connecting end 110; Four buckles 120 are evenly distributed around the central axis of the connecting end 110, so that the connecting ring 210 can contact multiple buckles 120 at the same time when sleeved, thereby achieving more uniform and stable buckling. The connecting ring 210 is designed to be sleeved on multiple buckles 120 and enter the mounting groove formed by the buckles 120 and the end face of the connecting end 110. In this way, the connecting ring 210 is firmly locked on the crank 100, achieving stable connection of the swing connecting rod 200 and the crank 100.

[0049] Referring to Figure 4 And Figure 5 , the outer side of the connecting end 110 is recessed to form a plurality of structure grooves 111, one structure groove 111 corresponds to one buckle 120, and the structure groove 111 extends to the buckle part 122 of the buckle 120; The buckle 120 on the end face of the connecting end 110 has a vertical section of the end face of the connecting end 110, and the structure groove 111 extends from the connecting end 110 to the buckle part 122 along the axial direction of the connecting end 110. Because the recessed groove is inclined in the circumferential direction, the overall strength of the buckle 120 material in the deformation direction is reduced, and when the buckle 120 is subjected to external force (such as extrusion during assembly, vibration or tension during use, etc.), the existence of the groove changes the stress distribution inside the buckle 120. The inclined groove allows stress to be dispersed along the direction of the groove, rather than concentrated in a local area of the buckle 120. In this way, damage such as cracking of the buckle 120 in the local area due to excessive stress can be avoided, and the overall reliability of the buckle 120 structure can be improved.

[0050] Referring to Figure 5 , multiple buckles 120 are arranged at intervals, which means that there is a certain space between them and a deformation space 121 is formed on the inner side, which allows the buckles 120 to deform towards each other when subjected to external force, thereby absorbing and dispersing stress to some extent and reducing the risk of damage caused by stress concentration; In order to prevent the multiple buckles 120 from deforming to form a buckle position and the swing connecting rod 200 from being pulled out of the crank 100, the deformation space 121 is detachably installed with an abutting anti-disengagement piece 130, at least part of the abutting anti-disengagement piece 130 exceeds the end face of the connecting end 110 and is placed in the deformation space 121, and the side of the buckle 120 away from the buckle part 122 abuts against the abutting anti-disengagement piece 130.

[0051] In an embodiment, the abutting anti-disengagement piece 130 is configured as a screw 131, the connecting end 110 is provided with a screw hole 141 communicating with the deformation space 121, and the screw 131 is screwed with the screw hole 141. The screw 131 is fixed with the connecting end 110, thereby limiting the deformation of the buckle 120. The fixing is simple and stable and reliable in locking with the connecting end 110, and the risk of connection failure is reduced. In an embodiment, the abutting anti-disengagement piece 130 can also be configured as a nut, and a screw 131 matched with the nut is arranged in the deformation space. The nut is installed in the deformation space, and the outer diameter of the nut is slightly larger than the inner diameter of the deformation space (of course, the outer diameter of the nut can be equal to or slightly smaller than the inner diameter of the deformation space). The two belong to interference fit, thereby causing a certain deformation of the elastic buckle and preventing disengagement. The assembly steps can be simplified, and the convenience and efficiency of maintenance are improved.

[0052] In other embodiments, the abutting anti-disengagement piece 130 can also be fixed by clamping, or by setting a bolt on the crank 100, or the like. The abutting anti-disengagement piece 130 is fixed on the connecting end 110 and limits the deformation of the buckle 120. The rocking structure realizes more stable and reliable connection, and reduces the risk of connection failure. Moreover, if the connecting ring 210 or the buckle 120 is damaged, it can be repaired by simple disassembly and replacement, thereby improving the convenience and efficiency of maintenance.

[0053] Reference Figures 3 to 5 In a specific scheme, the rocking structure further comprises a screw column 140 provided with a screw hole 141, and the connecting end 110 is hollow. The screw column 140 is arranged in the connecting end 110, and the screw hole 141 is used for screwing the screw 131 and making at least part of the head of the screw 131 protrude beyond the end face of the connecting end 110. The connecting end 110 is in the shape of a column, and the hollow part inside is used for accommodating the screw column 140. The screw column 140 is provided with a screw hole 141, and the screw 131 is screwed in the screw hole 141. At least part of the head of the screw 131 protrudes beyond the end face of the connecting end 110. The purpose of this design is to provide additional support and locking effect by the fastening force of the screw 131; thereby the head of the screw 131 can limit the deformation of the buckle 120. The screw 131 is screwed in the screw hole 141 of the screw column 140, thereby further fastening the connecting end 110 (including the buckle 120), so as to avoid the buckle 120 from being close to each other due to external force, which may cause the connecting ring 210 to disengage after installation. The fastening force of the screw 131 provides additional support and locking effect for the connection, thereby enhancing the stability of the connection.

[0054] In order to ensure the limit of the buckle 120, while preventing the deformation of the plurality of buckles 120 due to long-term use or external force, thereby causing the rocker link 200 to be detached from the crank 100, the end face of the connecting end 110 is further provided with a mounting section 150, and the connecting ring 210 is sleeved outside the plurality of buckles 120 and the outside of the mounting section 150; it can be understood that if the connecting ring 210 continuously acts on the plurality of buckles 120, the buckles 120 will continuously deform, and the durability will be affected; through the contact between the mounting section 150 and the connecting ring 210, the connecting ring 210 is relatively moved to act on the mounting section 150, thereby reducing the influence of the buckle 120.

[0055] With reference to Figure 4 and Figure 5 , specifically, the mounting section 150 can be a rib provided on the end face of the connecting end 110, and the plurality of buckles 120 are arranged at intervals, which means that there is a certain space between them and a deformation space 121 is formed on the inside, and a plurality of gaps are formed between the plurality of buckles 120, and the mounting section 150 is provided with a plurality of mounting sections 150, one mounting section 150 is arranged between two buckles 120, and the plurality of mounting sections 150 bear the main stress in the movement process of the connecting ring 210, in order to further limit the movement range of the connecting ring 210, the mounting section 150 is arranged around the end face of the connecting end 110, and the outside of the mounting section 150 and the end face of the connecting end 110 form a limiting step 160, and the limiting step 160 limits the connecting ring 210 together with the plurality of buckles 120; that is, the wall thickness of the mounting section 150 is less than the wall thickness of the connecting end 110, and the limiting step 160 is formed on the outside of the two, and the limiting step 160 and the buckle portion 122 of the buckle 120 define an installation groove on the outside, and the connecting ring 210 is sleeved in the installation groove.

[0056] In addition, in order to be aesthetically pleasing, the end of the stud 140 away from the buckle 120 does not exceed the connecting end 110; that is, the stud 140 at that end is completely located in the internal space of the connecting end 110 and does not interfere with the structure or function outside the connecting end 110; the complete location of the stud 140 in the connecting end 110 makes the assembly process smoother. The assembly personnel can more easily screw the screw 131 on the stud 140 without worrying about the interference of the stud 140 with the external structure; since the stud 140 is located inside the connecting end 110, and the fastening force of the screw 131 directly acts on the stud 140, this helps to provide more uniform and stable connecting force. Specifically, a plurality of connecting ribs are provided between the mounting column and the inner wall of the connecting end 110, and the plurality of connecting ribs are arranged at intervals; this facilitates the molding of the mounting column and also ensures the bearing capacity during the locking process of the mounting column.

[0057] With reference to Figure 1The utility model also proposes a fan of shaking head, this fan of shaking head includes main motor, fan machine head and shaking head structure, the specific structure of this shaking head structure refers to the above embodiment, because this shaking head fan adopts all the technical schemes of the above all embodiments, therefore has all the beneficial effects brought by the technical scheme of the above embodiment at least, does not repeat here.

[0058] The shaking head structure of the electric fan realizes swinging through the following steps: the support shaft of the main motor is inserted into the other end of the shaking link, the support shaft drives the rotation of the crank 100, the rotation of the crank 100 is transmitted to the shaking link 200 through the connecting rod, the shaking link 200 swings within a certain angle, the swinging of the shaking link 200 further drives the left and right swinging of the fan head part, and the expansion of the air supply range is realized.

[0059] The above is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the attached drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A head-shaking structure, characterized in that, The crank comprises a connecting end, and an end surface of the connecting end is provided with a plurality of buckles in a circumferential direction, and the plurality of buckles surround a deformation space, and a buckle portion of the buckle protrudes towards a side away from the deformation space. The head-shaking connecting rod is provided with a connecting ring at one end, and the connecting ring is at least sleeved outside the plurality of buckles, and the buckle portion of each buckle is buckled on a side of the connecting ring away from the end surface of the connecting end. The buckling amount of the buckle and the connecting ring is 0.2mm-3mm. An outer surface of the buckle is provided with a guide surface, and the guide surface is inclined from the buckle portion to the connecting end and away from the deformation space.

2. A head assembly as claimed in claim 1, wherein the head assembly is configured to rotate about the vertical axis in a first direction and in a second direction opposite to the first direction. The crank is a plastic part; and / or, the number of the plurality of buckles is two to six; and / or, an outer side surface of the connecting end is recessed to form a plurality of structure grooves, one structure groove corresponds to one buckle, and the structure groove extends to the buckle portion of the buckle.

3. The head assembly of claim 1 wherein the head assembly is configured to rotate about the first axis and the second axis. The deformation space is detachably provided with an abutting anti-disengagement part, and a side of the buckle away from the buckle portion abuts against the abutting anti-disengagement part.

4. The head assembly of claim 1 wherein, The abutting anti-disengagement part is configured as a screw, the connecting end is provided with a screw hole communicating with the deformation space, and the screw is screwed with the screw hole.

5. The head assembly of claim 1 wherein, The connecting end is hollow, and the head-shaking structure further comprises a threaded stud provided in the hollow of the connecting end, the threaded stud is provided with a screw hole, and the screw is screwed with the threaded stud.

6. A head assembly as claimed in claim 5, wherein the head assembly is configured to rotate the head assembly about the first axis of rotation in a first direction and in a second direction opposite to the first direction. An end surface of the connecting end is further provided with a mounting section, and the connecting ring is sleeved outside the plurality of buckles and outside the mounting section.

7. A head assembly according to claim 6, wherein the head assembly is configured to be mounted to a support structure such that the head assembly is able to rotate about the vertical axis of rotation. The mounting section is provided with a plurality of mounting sections, a plurality of gaps are formed between the plurality of buckles, one mounting section is arranged in one gap, a plurality of mounting sections surround the end surface of the connecting end, an outer side of the mounting section forms a limiting step with the end surface of the connecting end, and the limiting step limits the connecting ring together with the plurality of buckles.

8. The head assembly of claim 1 wherein, The head-shaking structure comprises a main motor and a head-shaking structure as claimed in any one of claims 1 to 9, and a supporting shaft of the main motor is inserted into the other end of the head-shaking connecting rod.

9. A head assembly as claimed in claim 8, wherein the head assembly is configured to rotate the head assembly about the vertical axis in a first direction and in a second direction opposite to the first direction. ​ 10. A fan, characterized by ​

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