Up-down swinging head structure

Abstract

The utility model relates to an up-down swing head structure which comprises a motor, a pinion, a large gear, a supporting assembly, a first fixing base, a second fixing base and an elastic buffering assembly. The small gear is fixed to the motor, the large gear is meshed with the small gear, the supporting assembly is sleeved with the large gear, the large gear is fixedly connected with the second fixing base, the two ends of the supporting assembly are connected with the first fixing base and the second fixing base, the first end of the elastic buffering assembly is fixed to the large gear, and the second end of the elastic buffering assembly is connected with the supporting assembly; wherein the motor drives the small gear to rotate and drives the large gear to rotate based on the small gear; the large gear rotates to drive the second fixing seat to rotate around the axis, and the first fixing seat and the second fixing seat synchronously swing up and down around the axis; compared with the prior art, according to the technical scheme, the elastic buffering assembly is arranged, vibration energy is consumed based on the characteristic of elastic deformation of the elastic buffering assembly, the vibration amplitude transmitted to the whole structure of the fan is reduced, and then abnormal noise generated by vibration is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, and in particular to an up-down swing head structure. BACKGROUND

[0002] In the technical field of fans, the swing head structure is an important component of the fan, and its performance directly affects the use experience of the fan.

[0003] At present, the swing head structure of most fans in the prior art has obvious defects; specifically, when the fan swings, it produces abnormal noise, which is significantly amplified in a quiet environment; for example, in a quiet environment such as at night, in a library, or in an office, the abnormal noise of the fan is particularly prominent.

[0004] This defect has a serious negative impact, greatly interfering with people's rest, study, and work, making it impossible for consumers to obtain a good experience during the use of the fan, and reducing the use value of the fan, so it is urgent to improve the swing head structure of the fan in this field. CONTENT OF THE INVENTION

[0005] The present application provides an up-down swing head structure, which consumes vibration energy based on the elastic deformation characteristics of the elastic buffer assembly, reduces the vibration amplitude transmitted to the overall structure of the fan, and thus reduces the abnormal noise caused by vibration.

[0006] In a first aspect, the present application provides an up-down swing head structure, comprising: a motor, a pinion, a gear, a support assembly, a first fixed seat, a second fixed seat, and an elastic buffer assembly; the pinion is fixed on the motor, the gear is engaged with the pinion, and the gear is sleeved on the support assembly and fixedly connected with the second fixed seat, both ends of the support assembly are connected with the first fixed seat and the second fixed seat respectively, the first end of the elastic buffer assembly is fixed on the gear, and the second end of the elastic buffer assembly is connected with the support assembly; wherein the motor drives the pinion to rotate, and drives the gear to rotate based on the pinion; the rotation of the gear drives the second fixed seat to rotate around an axis, and synchronously drives the first fixed seat and the second fixed seat to swing up and down around the axis.

[0007] In a possible implementation, both ends of the support assembly are provided with support columns, and the support columns are provided with clamping grooves, and the first fixed seat and the second fixed seat are respectively provided with clamping rings, wherein the clamping rings are clamped on the clamping grooves.

[0008] In a possible implementation, the large gear is provided with a first through hole, and the support column of the second end of the support assembly is connected with the large gear through the first through hole.

[0009] In a possible implementation, the first through hole is provided with an annular groove, and the elastic buffer assembly is placed in the annular groove.

[0010] In a possible implementation, the upper and lower swing head structure provided by the application further comprises: a pinion fixed frame; the pinion fixed frame is fixed on the support assembly; the pinion fixed frame is provided with a second through hole, and one end of the pinion is arranged in the second through hole.

[0011] In a possible implementation, the upper and lower swing head structure further comprises: a support seat and a fan rod part; the support seat is fixedly connected with the fan rod part, and the support assembly is fixed on the support seat.

[0012] In a possible implementation, the upper and lower swing head structure further comprises: a motor support and a motor rear shell; the motor support is fixedly connected with the motor rear shell.

[0013] In a possible implementation, one end of the first fixed seat is fixedly connected with a first end of the motor support, and one end of the second fixed seat is fixedly connected with a second end of the motor support.

[0014] In a possible implementation, the motor rear shell is provided with a third through hole at each end; one end of the first fixed seat is connected with the motor rear shell through the third through hole at the first end of the motor rear shell, and one end of the second fixed seat is connected with the motor rear shell through the third through hole at the second end of the motor rear shell.

[0015] In a possible implementation, the first fixed seat and the second fixed seat are provided in a zero configuration between the support assembly.

[0016] Compared with the prior art, the above technical solution provided by the embodiments of the application has the following advantages:

[0017] This application provides a tilting head structure, including a motor, a small gear, a large gear, a support assembly, a first fixed base, a second fixed base, and an elastic buffer assembly. The small gear is fixed to the motor, the large gear meshes with the small gear, and the large gear is sleeved on the support assembly and fixedly connected to the second fixed base. Both ends of the support assembly are connected to the first fixed base and the second fixed base, respectively. The first end of the elastic buffer assembly is fixed to the large gear, and the second end of the elastic buffer assembly is connected to the support assembly. The motor drives the small gear to rotate, and based on the small gear, drives the large gear. Rotation; the rotation of the large gear drives the second fixed seat to rotate around the axis, and causes the first fixed seat and the second fixed seat to swing up and down synchronously around the axis; compared with the prior art, the technical solution of this application sets an elastic buffer component. When the fan is running, the large gear drives the second fixed seat to rotate, thereby driving the second fixed seat and the components fixedly connected to it to rotate. The friction and collision between the components will generate vibration. The elastic buffer component consumes the vibration energy through its own elastic deformation, reducing the vibration amplitude transmitted to the overall structure of the fan, thereby reducing the abnormal noise caused by vibration. It can solve the problem of fan noise being amplified in a quiet environment and improve the user experience. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a schematic diagram of an up-and-down swing head structure provided in an embodiment of this application;

[0022] Figure 2 This is another structural schematic diagram of an up-and-down swing head structure provided in an embodiment of this application;

[0023] Figure 3 This is another schematic diagram of an up-and-down swing head structure provided in an embodiment of this application. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0025] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of particular examples in the following are described. Of course, they are only examples and are not intended to limit the present application. Furthermore, the present application can repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not indicate a relationship between the various embodiments and / or settings discussed.

[0026] For the purpose of description, spatial relative terms as shown in the drawings can be used to describe the relative position relationship or movement of one element or feature with respect to another element or feature, such as "inner", "outer", "inboard", "outboard", "under", "below", "over", "above", "front", "back", and the like. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "over" another element or feature. Therefore, the example term "below" can include both up and down positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0027] Figure 1 A structural schematic diagram of an up-and-down swing head structure provided by the embodiments of the present application is shown in FIG. 1. As shown in the figure, the up-and-down swing head structure includes a motor 101, a pinion 102, a gear 103, a support assembly 104, a first fixed seat 105, a second fixed seat 106, and an elastic buffer assembly 107, and the details are as follows: Figure 1

[0028] ​The small gear 102 is fixed on the motor 101, the large gear 103 is engaged with the small gear 102, and the large gear 103 is sleeved on the support assembly 104 and fixedly connected with the second fixed seat 106, both ends of the support assembly 104 are connected with the first fixed seat 105 and the second fixed seat 106 respectively, and the first end of the elastic buffer assembly 107 is fixed on the large gear 103, and the second end of the elastic buffer assembly 107 is connected with the support assembly 104.

[0029] The motor 101 drives the small gear 102 to rotate, and drives the large gear 103 to rotate based on the small gear 102; the rotation of the large gear 103 drives the second fixed seat 106 to rotate around the axis, and synchronously drives the first fixed seat 105 and the second fixed seat 106 to swing up and down around the axis.

[0030] In an embodiment, the support assembly 104 is provided with a motor through hole; and the motor 101 is provided with an output shaft.

[0031] Specifically, the motor 101 is arranged at the first end of the support assembly 104, and the small gear 102 is arranged at the second end of the support assembly 104, wherein the output shaft of the motor 101 passes through the motor through hole of the support assembly 104 and is connected with the small gear 102, so as to fix the small gear 102 on the motor 101 and fix the motor 101 and the small gear 102 on the support assembly 104.

[0032] Preferably, the support assembly 104 is an iron support assembly.

[0033] In an embodiment, both ends of the support assembly 104 are provided with support columns, and the support columns are provided with clamping grooves, and the first fixed seat 105 and the second fixed seat 106 are respectively provided with buckling rings, wherein the buckling rings are buckled on the clamping grooves.

[0034] Specifically, the first fixed seat 105 is arranged at the first end of the support assembly 104, and the second fixed seat 106 is arranged at the second end of the support assembly 104.

[0035] Specifically, the first fixed seat 105 and the support assembly 104 are provided with a zero fit, and the second fixed seat 106 and the support assembly 104 are provided with a zero fit; wherein the fit clearance between the support column of the support assembly 104 and the first fixed seat 105 is controlled to be 0.01-0.03mm, which allows the first fixed seat 105 to rotate freely and suppresses the radial jumping of the first fixed seat 105; the fit is similar to the play design of the precision bearing, and ensures that the axis of the iron support assembly coincides with the axis of the fixed seat during the swing movement.

[0036] Specifically, the first clamping ring is arranged on the first fixed seat 105, and is matched with a clamping groove on a first supporting column arranged on the first end of the supporting assembly 104, so that the first fixed seat 105 is connected with the first supporting column on the first end of the supporting assembly 104, and the supporting assembly 104 is prevented from moving rightward relative to the first fixed seat 105.

[0037] Specifically, the second clamping ring is arranged on the second fixed seat 106, and is matched with a clamping groove on a second supporting column arranged on the second end of the supporting assembly 104, so that the second fixed seat 106 is connected with the second supporting column on the second end of the supporting assembly 104, and the supporting assembly 104 is prevented from moving leftward relative to the second fixed seat 106.

[0038] In an embodiment, the first through hole is arranged on the large gear 103, and the supporting column at the second end of the supporting assembly 104 is connected with the large gear 103 through the second through hole.

[0039] Specifically, the first through hole arranged on the large gear 103 provides an accurate mounting position for the supporting column of the supporting assembly 104; the supporting column passes through the first through hole and is connected with the large gear 103, further strengthening the structural relevance between the large gear 103 and the supporting assembly 104; this connection mode enables the large gear 103 to rotate around the axis of the supporting column, and when the large gear 103 rotates around the supporting column, the supporting assembly 104 plays a role in fixing the rotation axis. The connection of the supporting column with the large gear 103 through the first through hole ensures the stability and accuracy of the large gear 103 during rotation.

[0040] Specifically, when the motor 101 drives the small gear 102 to rotate, the small gear 102 drives the large gear 103 to rotate, and since the second fixed seat 106 is fixedly connected with the large gear 103, the rotating movement of the large gear 103 can be directly transmitted to the second fixed seat 106, so that the second fixed seat 106 moves synchronously.

[0041] In an embodiment, the first through hole is arranged on the large gear 103, and the supporting column at the second end of the supporting assembly 104 is connected with the large gear 103 through the second through hole.

[0042] Specifically, the elastic buffer assembly 107 is a torsion spring.

[0043] Specifically, the geometric shape of the annular groove matches the shape of the elastic buffer assembly 107, which can ensure that the elastic buffer assembly 107 always maintains a stable initial position during operation; preferably, the width and depth of the annular groove are strictly matched with the outer diameter of the torsional spring and the wire diameter to avoid axial or radial displacement of the torsional spring during the swing movement.

[0044] Specifically, the second end of the elastic buffer assembly 107 is placed in the annular groove, and the first end of the elastic buffer assembly 107 is fixedly connected with the elastic buffer assembly 107 through the support column of the second end of the support assembly 104.

[0045] Specifically, the constraint of the annular groove makes the deformation direction of the elastic buffer assembly 107 strictly aligned with the swing movement direction; for example, when the large gear 103 rotates, one end of the torsional spring is fixed to the annular groove, and the other end is connected with the support assembly 104, and the deformation direction of the torsional spring is perpendicular to the rotation axis of the large gear 103, thereby providing uniform damping force during the swing process, suppressing resonance phenomenon, and avoiding abnormal sound caused by mechanical vibration, that is, the torsional spring can absorb the vibration generated during the operation of the fan, reduce noise, and make the up-down swing structure stable and silent during swing.

[0046] Specifically, the fixation of the elastic buffer assembly 107 in the annular groove enables it to play a dual role in the swing movement; for example, when the fan swings upward: the torsional spring is stretched or twisted, storing elastic potential energy, ensuring that the fan head can smoothly fall back after reaching the maximum swing angle or after the external force disappears, and enabling the fan to swing downward; when the fan swings downward: the torsional spring is compressed, absorbing the kinetic energy of the head due to gravity acceleration, avoiding rigid impact, for example, when the fan quickly falls back from the maximum upward angle, the compression deformation of the torsional spring can convert the impact energy into elastic potential energy, reducing mechanical noise.

[0047] In an embodiment, the up-down swing structure provided by the embodiment of the application further comprises a support seat and a fan rod part; wherein the support seat is fixedly connected with the fan rod part, and the support assembly is fixed on the support seat.

[0048] Specifically, the support seat and the fan rod part are fixedly connected, forming a stable base structure; the support seat usually has a large contact area, which can increase the friction and stability with the placement plane, preventing the fan from falling during operation; and the fan rod part provides vertical support and height adjustment for the entire swing structure; the support assembly 104 is fixed on the support seat, so that the entire up-down swing structure can be stably installed on this base, and the normal swing of each component will not be affected by shaking or displacement during operation.

[0049] In an embodiment, the up-and-down swing head structure provided by the embodiment of the application further comprises a pinion fixed frame 1021, as shown in Figure 2 Figure 2 Another structural schematic diagram of the up-and-down swing head structure provided by the embodiment of the application.

[0050] In an embodiment, the pinion fixed frame 1021 is fixed on the support assembly, so as to ensure that the pinion fixed frame does not shake or shift at will during the swing.

[0051] Specifically, the pinion fixed frame 1021 is provided with a second through hole, and one end of the pinion 102 is arranged in the second through hole.

[0052] Specifically, when the motor operates, the pinion 102 and the gear wheel 103 are in meshing with each other, driving the first fixed seat 105 and the second fixed seat 106 to rotate upward and downward, so as to drive the components fixedly connected with the first fixed seat 105 and the second fixed seat 106 to rotate, and realize the up-and-down swing of the head.

[0053] Specifically, in the up-and-down swing head structure, the pinion 102 and the gear wheel 103 are in meshing with each other to realize the transmission of power and the swing movement; if the axis position of the pinion 102 is unstable and deviates from the axis of the motor during the rotation, the meshing of the pinion 102 and the gear wheel 103 will be problematic, such as uneven meshing gap and excessive local force, etc.; these problems will directly affect the precision of the gear transmission, so that the angle of the swing is inaccurate and the movement is unstable, and the second through hole can realize the accurate positioning of the pinion; so that the pinion 102 does not easily deviate from the axis of the motor during the rotation, that is, the axis position is fixed.

[0054] In an embodiment, the up-and-down swing head structure provided by the embodiment of the application further comprises a motor support 108 and a motor rear shell 109, as shown in Figure 3 Figure 3 Another structural schematic diagram of the up-and-down swing head structure provided by the embodiment of the application.

[0055] In an embodiment, the motor support 108 is fixedly connected with the motor rear shell 109.

[0056] In an embodiment, one end of the first fixed seat 105 is fixedly connected with a first end of the motor support 108, and one end of the second fixed seat 106 is fixedly connected with a second end of the motor support 108.

[0057] Specifically, the first fixed seat 105 and the second fixed seat 106 are respectively connected to the two ends of the motor support 108, forming a symmetrical support structure; this design makes the torque uniformly distributed during the swing movement, avoiding the deformation of the support or the meshing deviation of the gear caused by unilateral force.​​

[0058] In one embodiment, the motor rear shell 109 is provided with third through holes at both ends; one end of the first fixed seat 105 is connected with the motor rear shell 109 through the third through hole on the first end of the motor rear shell 109, and one end of the second fixed seat 106 is connected with the motor rear shell 109 through the third through hole on the second end of the motor rear shell 109.

[0059] Specifically, the third through holes at both ends of the motor rear shell 109 provide precise assembly reference for the first fixed seat 105 and the second fixed seat 106; the first fixed seat 105 and the second fixed seat 106 are connected with the motor rear shell 109 through the through holes, which ensures that the installation position is strictly aligned with the axis of the motor support 108, avoiding the swing head jam caused by installation error.

[0060] Specifically, the first fixed seat 105 and the second fixed seat 106 form symmetrical fulcrums through the first end and the second end of the motor support 108 respectively, the support assembly 104 serves as an intermediate connecting piece, and both ends are matched with the first fixed seat 105 and the second fixed seat 106, forming a "left-middle-right" three-point collinear support system; this symmetrical layout makes the rotation axis of the support assembly 107 strictly coincide with the rotation axis of the motor support 108, ensuring the coaxiality of the swing head movement.

[0061] In one embodiment, when the up-and-down swing head structure executes swing head movement, the driving force of the motor 101 is transmitted to the head of the fan through the pinion 102-gear 103-second fixed seat 106-motor support 108 and motor rear shell 109-first fixed seat 105; due to the symmetrical distribution of the first fixed seat and the second fixed seat, the force flow path forms a symmetrical closed loop, avoiding the deformation of the support caused by unilateral bending moment; and the matched arrangement between the first fixed seat 106 and the second fixed seat 106 and the support assembly 107 ensures that the swing head mass is uniformly distributed on both sides of the rotating shaft.

[0062] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0063] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0064] In addition, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0065] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0067] In the description of the application, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the above expressions in various places in the description are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers for the various embodiments or examples, and are not intended to identify a particular order or sequence.

[0068] Obviously, various modifications and changes can be made to the present application without departing from the spirit and scope of the application. It is understood that such modifications and changes are intended to fall within the scope of the application, which is to be interpreted in the broadest sense possible. Accordingly, the proper scope of the present application is to be determined only by the following claims and their equivalents.

[0069] The above description is the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tilting head structure, characterized in that, Comprising: motor, pinion gear, large gear, support assembly, first fixed seat, second fixed seat and elastic buffer assembly; The pinion gear is fixed on the motor, the large gear is engaged with the pinion gear, and the large gear is sleeved on the support assembly and fixedly connected with the second fixed seat, both ends of the support assembly are connected with the first fixed seat and the second fixed seat respectively, and the first end of the elastic buffer assembly is fixed on the large gear, and the second end of the elastic buffer assembly is connected with the support assembly. Wherein, the motor drives the pinion gear to rotate, and drives the large gear to rotate based on the pinion gear; the rotation of the large gear drives the second fixed seat to rotate around the axis, and makes the first fixed seat and the second fixed seat synchronous swing up and down around the axis.

2. The up-and-down swing head structure according to claim 1, wherein Both ends of the support assembly are provided with support columns, and the support columns are provided with clamping grooves, and the first fixed seat and the second fixed seat are respectively provided with buckles, wherein the buckles are buckled on the clamping grooves.

3. The up-and-down swing head structure according to claim 2, wherein The large gear is provided with a first through hole, and the support column at the second end of the support assembly is connected with the large gear through the first through hole.

4. The up-and-down swing head structure according to claim 3, wherein The periphery of the first through hole is provided with an annular groove, and the elastic buffer assembly is placed in the annular groove.

5. The up-and-down swing head structure according to claim 1, wherein Further comprising: pinion gear fixing frame; The pinion gear fixing frame is fixed on the support assembly; The pinion gear fixing frame is provided with a second through hole, and one end of the pinion gear is arranged in the second through hole.

6. The up-and-down swing head structure according to claim 1, wherein Further comprising: support seat and fan rod part; Wherein, the support seat is fixedly connected with the fan rod part, and the support assembly is fixed on the support seat.

7. The up-and-down swing head structure according to claim 1, wherein Further comprising: motor support and motor rear shell; Wherein, the motor support is fixedly connected with the motor rear shell.

8. The up-and-down swing head structure according to claim 7, wherein One end of the first fixed seat is fixedly connected with the first end of the motor support, and one end of the second fixed seat is fixedly connected with the second end of the motor support.

9. The up-and-down swing head structure according to claim 7, wherein Both ends of the motor rear shell are respectively provided with third through holes; One end of the first fixed seat passes through the third through hole on the first end of the motor rear shell and is connected with the motor rear shell, and one end of the second fixed seat passes through the third through hole on the second end of the motor rear shell and is connected with the motor rear shell.

10. The up-and-down swing head structure according to claim 1, wherein The first fixed seat and the second fixed seat are zero set between the support assembly.

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