Integral rotating base

By designing the overall rotating base, the transmission mechanism and conductive components are used to keep the LED lights or decorations powered up during movement, solving the problem that LED lights cannot be installed on the moving ornaments, improving the user experience and providing more comprehensive protection.

CN223121343UActive Publication Date: 2025-07-18GUANGZHOU WEICHI PHOTOELECTRIC TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422043816.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-22
Publication Date
2025-07-18
Estimated Expiration
2034-08-22

AI Technical Summary

Technical Problem

In the prior art, LED lights or other energized decorations cannot be installed on the sports ornaments, resulting in poor user experience and incomplete protection of the existing motor compartment.

Method used

An integral rotating base is designed, including a seat body, a compartment body, a motor, a transmission mechanism, a rotation part and an entire cover body. The rotation part and the entire cover body are driven to rotate through the transmission mechanism, and the LED lamp or decoration is ensured to be always energized through conductive parts, and the entire cover body and the rotation part are rotated together.

Benefits of technology

It realizes that LED lights or decorations are always powered up during movement, improving the user experience and providing more comprehensive protection through the design of the overall rotating base.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223121343U_ABST
    Figure CN223121343U_ABST
Patent Text Reader

Abstract

The utility model discloses an integral rotary base of ornament, including seat body, bin body, motor, transmission mechanism, rotation portion and whole cover body, whole cover body is provided on the upper end face of seat body, motor and transmission mechanism both are provided in the bin body, transmission mechanism is connected with motor, transmission mechanism is also connected with rotation portion, and the rotation portion is connected with the bin body. The motor can drive the rotating part to rotate through the transmission mechanism, and the cap arranging body is connected with the rotating part and can rotate along with the rotating part. And the user has better use experience. In addition, the back face of the whole cover body can be clamped into the rotating part, the whole cover body can rotate along with the rotating part, and therefore the effect that the whole cover body and the rotating part rotate together is achieved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to a rotating device, in particular to an integral rotating base for an ornament. Background Art

[0002] Ornaments are daily necessities widely used in daily life. In order to enhance aesthetics and user experience, producers will install LED lights on ornaments. In the prior art, ornaments can be divided into static ornaments and moving ornaments.

[0003] Among them, all components on the static ornament are stationary, and at least a part of the moving ornament can move. Whether installing LED lights or other decorative items that enhance aesthetics and user experience on static or moving ornaments, the LED lights or other decorative items can often only be installed on stationary components.

[0004] In the prior art, LED lights or other electrically powered decorative items cannot be installed on the moving part, nor can it provide a better experience for users.

[0005] To solve the above technical problems, the applicant applied for a utility model patent on August 17, 2024. The name of the utility model patent is Motor Chamber, and the application number is 2024219957432. Through the motor chamber of the ornament, LED lights or other electrically powered decorative items can be set on the rotating part and rotate with the rotating part, which can well solve the above technical problems. However, the applicant found that the protected subject of the motor chamber applied on August 17, 2024 is the "motor chamber of the ornament", and in some actual application scenarios, it cannot play a direct protective role. In view of the applicant's need to protect the "integral rotating base", LED lights or other electrically powered decorative items can be directly set on the "integral rotating base". Therefore, it is necessary to apply for an integral rotating base. Summary of the Utility Model

[0006] To solve the above problems existing in the prior art, the purpose of the present utility model is to provide an integral rotating base.

[0007] According to one aspect of the present utility model, there is provided an integral rotating base for an ornament, including a base body, a chamber body, a motor, a transmission mechanism, a rotating part, and a whole cover body. The whole cover body is arranged on the upper end surface of the base body. The motor and the transmission mechanism are both arranged in the chamber body. The transmission mechanism is connected to the motor and is also connected to the rotating part. The motor can drive the rotating part to rotate through the transmission mechanism. The whole cover body is connected to the rotating part and can rotate together with the rotating part.

[0008] Therefore, the entire cover body of the present utility model can rotate together with the rotating part, and an LED lamp or other decorative items that need to be powered on can be installed on the rotating part, achieving the effect that the LED lamp or other decorative items that need to be powered on rotate integrally with the entire cover body, achieving the effect of an "overall rotating base".

[0009] In some embodiments, a receiving portion is provided at the upper end of the rotating part, and a corresponding convex column is provided on the back surface of the entire cover body. The convex column can be snapped into the receiving portion so that the entire cover body can rotate together with the rotating part.

[0010] In some embodiments, a support plate is provided at the upper end of the base body. A through hole is provided at the middle position of the support plate, and a plurality of balls are provided on the support plate. A plurality of guiding columns are provided on the back surface of the entire cover body. The guiding columns can be positioned at the edge of the through hole so that the entire cover body can rotate within the range where the guiding columns can rotate, and the back surface of the entire cover body is in contact with the balls and forms a rolling connection.

[0011] In some embodiments, a conductive part and a power source are further included. A part of the conductive part is provided on the rotating part. When the motor drives the rotating part and a part of the conductive part to rotate through a transmission mechanism, the conductive part can always form an electrical connection. The conductive part is electrically connected to the power source, and the power source is also electrically connected to the motor and provides electrical energy for the motor.

[0012] In some embodiments, the conductive part includes two conductive rings, two conductive elastic members, and a conductive main body. The two conductive rings are provided at the lower end of the rotating part. The two conductive elastic members and the conductive main body are electrically connected. One of the conductive elastic members is electrically connected to one of the conductive rings, and the other conductive elastic member is electrically connected to the other conductive ring. Thus, the two conductive rings are installed at the lower end of the rotating part, and the two conductive rings can rotate with the rotating part, and the conductive elastic members are always electrically connected to the conductive rings. Therefore, an LED lamp or other decorative items that need to be powered on can be provided on the rotating part, and the LED lamp or other decorative items that need to be powered on are always in an energized state during the movement process.

[0013] In some embodiments, the conductive elastic member is a spring. When the conductive ring rotates with the rotating part, the conductive elastic member is always in contact with the conductive ring. Thus, when powered on, the conductive ring is always in an energized state during rotation.

[0014] In some embodiments, the rotating part is integrally cylindrical, and the cross-section of the conductive ring is circular. Thus, the rotating part and the conductive ring of this shape can be more stable.

[0015] In some embodiments, the storage body includes an upper storage body and a lower storage body. The upper storage body and the lower storage body form a receiving space, and the motor and the transmission mechanism are both provided in the receiving space. Thus, the motor and the transmission mechanism can be better fixed by the upper storage body and the lower storage body.

[0016] In some embodiments, the transmission mechanism includes a transmission pulley set and a gear set. The transmission pulley set is connected to the motor, the gear set is connected to the transmission pulley set, and the motor is connected to the rotating part through the transmission pulley set and the gear set in sequence.

[0017] In some embodiments, the transmission pulley set includes a first transmission pulley, a belt, and a second transmission pulley. The first transmission pulley is coaxially connected to the output shaft of the motor. One end of the belt is sleeved on the first transmission pulley, and the other end is sleeved on the second transmission pulley. The second transmission pulley is connected to the gear set. Thus, when the motor starts, the motor can drive the first transmission pulley to rotate, the first transmission pulley can drive the second transmission pulley to rotate, and the second transmission pulley can drive the gear set to rotate.

[0018] In some embodiments, the gear set includes multiple gears. The multiple gears are sequentially meshed with each other to form a reduction structure. One of the gears is coaxially connected to the second transmission pulley, and another gear is coaxially connected to the rotating part. Thus, the multiple gears can achieve the function of speed reduction, enabling the rotating part to rotate at a set speed.

[0019] The beneficial effects of the present utility model are as follows:

[0020] In the present utility model, after the motor starts, the motor can drive the rotating part to rotate through the transmission mechanism. A slip ring is provided on the rotating part, and the slip ring can rotate along with the rotating part. Since the conductive elastic member is always in contact with the slip ring, and the conductive elastic member is also electrically connected to the conductive main body and the power supply, the slip ring can always be in an energized state. The slip ring can be electrically connected to an LED lamp or other decorative items to be energized, enabling the LED lamp or other decorative items to be energized all the time. The LED lamp or other decorative items to be energized can be arranged on the rotating part and rotate along with the rotating part, which can solve the problem in the prior art that the LED lamp or other decorative items to be energized cannot be installed on the rotating component, providing a better user experience for the user. In addition, the back of the entire cover body in the present utility model can be snapped into the rotating part, and the entire cover body can rotate together with the rotating part, thus forming the effect of the entire cover body and the rotating part rotating together. Compared with the utility model named "Motor Chamber" applied by the applicant on August 17, 2024, the present utility model can protect the "overall rotating base". The LED lamp or other decorative items to be energized can be directly installed on the overall rotating base of the present utility model to form a decorative product, making the product protection of the applicant more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an overall rotating base according to an embodiment of the present utility model;

[0022] Figure 2 is Figure 1Exploded structure schematic diagram of the overall rotating base shown;

[0023] Figure 3 For Figure 1 Another exploded structure schematic diagram of the overall rotating base shown;

[0024] Figure 4 For Figure 1 Structure schematic diagram of the bin body and other parts of the overall rotating base shown;

[0025] Figure 5 For Figure 1 Partial structure schematic diagram of the overall rotating base shown;

[0026] Figure 6 For Figure 5 Enlarged structure schematic diagram of part A shown;

[0027] Figure 7 For Figure 4 Structure schematic diagram of another direction of the overall rotating base with the bin body hidden shown;

[0028] Figure 8 For Figure 4 Structure schematic diagram of yet another direction of the overall rotating base with the bin body hidden shown;

[0029] Figure 9 For Figure 1 Circuit schematic diagram of the overall rotating base shown;

[0030] Figure 10 For Figure 1 Usage state schematic diagram of the overall rotating base shown;

[0031] Figure 11 For Figure 1 Structure schematic diagram of another part of the overall rotating base shown;

[0032] Figure 12 For Figure 1 Structure schematic diagram of the entire cover body of the overall rotating base shown.

[0033] 1 - Base body; 11 - Bin body; 111 - Upper bin body; 112 - Lower bin body; 12 - Entire cover body; 121 - Convex column; 122 - Guide column; 13 - Support plate; 131 - Ball; 2 - Motor; 3 - Transmission mechanism; 31 - Transmission pulley set; 311 - First transmission pulley; 312 - Belt; 313 - Second transmission pulley; 32 - Gear set; 4 - Rotating part; 5 - Conductive part; 51 - Conductive ring; 52 - Conductive elastic part; 53 - Conductive main body; 6 - Power supply; 7 - LED lamp. Specific implementation method

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0036] Figures 1 to 8 and Figures 10 to 12 Schematically shows the structure of the overall rotating base of an embodiment of the present utility model.

[0037] Figure 9 Schematically shows the circuit principle of the overall rotating base of an embodiment of the present utility model.

[0038] As Figures 1 to 12 shown, in this embodiment, the present utility model discloses an overall rotating base, which includes a base body 1, a bin body 11, a motor 2, a transmission mechanism 3, a rotating part 4, and a whole cover body 12.

[0039] As Figure 1 and Figure 2 shown, the whole cover body 12 can be installed on the upper end surface of the base body 1, the motor 2 and the transmission mechanism 3 can both be installed in the bin body 11, the transmission mechanism 3 is connected to the motor 2, and the transmission mechanism 3 is also connected to the rotating part 4. Therefore, when the motor 2 is started, the motor 2 can drive the rotating part 4 to rotate through the transmission mechanism 3. And the whole cover body 12 can be connected to the rotating part 4, and the whole cover body 12 can rotate together with the rotating part 4. Since the height (thickness) of the base body 1 is very small, there is a visual effect of "overall" rotation.

[0040] From Figures 1 to 10 it can be seen that a receiving part 41 is integrally formed at the upper end of the rotating part 4, and this receiving part 41 is actually a longitudinal through hole as Figure 4 shown, from Figure 12It can be seen that corresponding convex columns 121 can be formed on the back surface of the entire cover body 12. The convex columns 121 can be snapped into the receiving portions 41, that is, the convex columns 121 can be completely stuck in the receiving portions 41, so that the entire cover body 12 can rotate together with the rotating portion 4. In this embodiment, the cross-section of the convex column 121 is a regular octagon. Correspondingly, the cross-section of the receiving portion is also a regular octagon. In other embodiments, the cross-section of the convex column 121 can also be a regular hexagon. Correspondingly, the cross-section of the receiving portion is also a regular hexagon.

[0041] As Figure 2 and Figure 3 shown, a support plate 13 can be installed at the upper end of the seat body 1. A through hole 132 is formed at the middle position of the support plate 13. A plurality of balls 131 can be installed on the support plate 13. Four guiding columns 122 are integrally formed on the back surface of the entire cover body 12. The four guiding columns 122 can be positioned at the edge of the through hole (that is, the four guiding columns 122 are located inside the through hole and on the outer ring of the through hole), so that the entire cover body 12 can rotate within the range that the guiding columns 122 can rotate. The back surface of the entire cover body 12 is in contact with the balls and forms a rolling connection. By providing the balls 131, the friction force during the rotation of the entire cover body 12 can be reduced. The guiding columns 122 can play a role in guiding the entire cover body 12, allowing the entire cover body 12 to rotate within a set range and rotate around the center.

[0042] The present utility model further includes a conductive portion 5 and a power source 6. A part of the conductive portion 5 can be installed on the rotating portion 4. When the motor 2 drives the rotating portion 4 and a part of the conductive portion 5 to rotate through the transmission mechanism 3, the conductive portion 5 can always form an electrical connection. The conductive portion 5 is electrically connected to the power source 6. The power source 6 is also electrically connected to the motor 2 and provides electrical energy for the motor 2. Of course, the motor 2 and the conductive portion 5 can be connected in parallel. No matter how the rotating portion 4 and a part of the conductive portion 5 rotate, a part of the conductive portion 5 can be energized. An LED lamp or other decorative items to be energized can be installed on the rotating portion 4. The LED lamp or other decorative items to be energized are electrically connected to a part of the conductive portion 5. Therefore, the LED lamp or other decorative items to be energized can always be in an energized state during the rotation process.

[0043] The specific structure of the conductive portion 5 is as follows: As Figures 5 to 7As shown in the figure, the conductive part 5 includes two conductive rings 51, two conductive elastic members 52 and a conductive main body 53. The two conductive rings 51 can be installed at the lower end of the rotating part 4. The two conductive elastic members 52 and the conductive main body 53 are electrically connected. The upper conductive elastic member 52 is electrically connected to the upper conductive ring 51, and the lower conductive elastic member 52 is electrically connected to the lower conductive ring 51. The two conductive rings 51 can be installed at the lower end of the rotating part 4 and can rotate with the rotating part 4, and the conductive elastic member 52 is always in electrical connection with the conductive ring 51. Therefore, an LED lamp or other decorative items to be powered on can be provided on the rotating part 4. During the movement of the LED lamp or other decorative items to be powered on, they are always in an energized state.

[0044] As Figure 7 shown, the conductive elastic member 52 in this embodiment is a spring. When the conductive ring 51 rotates with the rotating part 4, the conductive elastic member 52 is in a compressed state. Therefore, the conductive elastic member 52 is always in contact with the conductive ring 51. When powered on, when the conductive ring 51 rotates, due to the elastic force, the conductive ring 51, the conductive elastic member 52 and the conductive main body 53 are always in an energized state. Of course, in other embodiments, the conductive elastic member 52 can also be a spring sheet. No matter what structure the conductive elastic member 52 is, as long as the conductive ring 51 rotates with the rotating part 4, the conductive elastic member 52 is always in contact with the conductive ring 51.

[0045] From Figure 1 and Figure 11 it can be seen that in order to connect the LED lamp 8, connection wires 81 can be provided. There are two connection wires 81, and the lower ends of the two connection wires 81 are respectively electrically connected to the two conductive rings 51. Therefore, the power supply 7 can provide electrical energy for the LED lamp 8 through the two conductive rings 51 and the connection wires 81, and the connection wires 81 are fixed to the rotating part 4. Therefore, the connection wires 81 can rotate with the rotating part 4. While the connection wires 81 rotate, the LED lamp 8 also rotates together, and the LED lamp 8 is always in an energized state during the rotation process. Therefore, the LED lamp 8 can always be lit.

[0046] As Figure 7 shown, it can be seen that the rotating part 4 is generally cylindrical as a whole, and the cross-section of the conductive ring 51 is circular. Such a shape of the rotating part 4 and the conductive ring 51 can be more stable. That is to say, when the rotating part 4 rotates circularly, the conductive ring 51 will also rotate circularly.

[0047] As Figure 4As shown, the bin body 11 includes an upper bin body 111 and a lower bin body 112. An accommodation space is formed between the upper bin body 111 and the lower bin body 112. Both the motor 2 and the transmission mechanism 3 can be installed in the accommodation space, and the motor 2 and the transmission mechanism 3 can be better fixed by the upper bin body 111 and the lower bin body 112. Of course, in other embodiments, the structure of the bin body 11 is not limited to the above shape, as long as the bin body 11 can accommodate the motor 2 and the transmission mechanism 3.

[0048] The structure of the transmission mechanism 3 will be described below: As Figure 7 and Figure 8 shown, the transmission mechanism 3 includes a transmission pulley set 31 and a gear set 32. The transmission pulley set 31 is connected to the motor 2, the gear set 32 is connected to the transmission pulley set 31, and the motor 2 is connected to the rotating part 4 through the transmission pulley set 31 and the gear set 32 in sequence.

[0049] The structure of the transmission pulley set 31 will be described in detail below: The transmission pulley set 31 includes a first transmission pulley 311, a belt 312, and a second transmission pulley 313. The first transmission pulley 311 is coaxially connected to the output shaft of the motor 2. One end of the belt 312 is sleeved on the first transmission pulley 311, and the other end is sleeved on the second transmission pulley 313. The second transmission pulley 313 is connected to the gear set 32. When the motor 2 starts, the motor 2 can drive the first transmission pulley 311 to rotate, the first transmission pulley 311 can drive the second transmission pulley 313 to rotate, and the second transmission pulley 313 can drive the gear set 32 to rotate.

[0050] The structure of the gear set 32 will be described in detail below. The gear set 32 includes a plurality of gears that are sequentially meshed with each other to form a speed reduction structure. One of the gears is coaxially connected to the second transmission pulley 313, and another gear is coaxially connected to the rotating part 4. The rotation speed can be reduced by the plurality of gears, so that the rotating part 4 rotates at a set speed. Since the gear set 32 can be set according to the actual situation to adjust the transmission ratio, the specific structure of the gear set 32 can be as Figure 8 shown, and generally the setting of the gear set 32 is a conventional means, so it will not be elaborated here.

[0051] In the present utility model, after the motor 2 is started, the motor 2 can drive the rotating part 4 to rotate through the transmission mechanism 3. A slip ring 51 is provided on the rotating part 4, and the slip ring 51 can rotate following the rotating part 4. Since the conductive elastic member 52 is always in contact with the slip ring 51, and the conductive elastic member 52 is electrically connected to the conductive body 53, it can make the slip ring 51 always in an energized state. The slip ring 51 can be electrically connected to the LED lamp 8 or other ornaments to be energized, so that the LED lamp 8 or other ornaments to be energized can always be in an energized state. The LED lamp 8 or other ornaments to be energized can be arranged on the rotating part 4 and rotate following the rotating part 4, which can solve the problem in the prior art that the LED lamp or other ornaments to be energized cannot be installed on the rotating component, giving the user a better usage experience. In addition, the back surface of the whole cover body 12 in the present utility model can be snapped into the rotating part, and the whole cover body 12 can rotate together with the rotating part 4, thus forming the effect that the whole cover body 12 and the rotating part rotate together.

[0052] The present utility model is not limited to the above optional embodiments. Any person can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present utility model, they are all within the protection scope of the present utility model.

Claims

1. An integral rotating base, characterized in that: It includes a base body (1), a bin body (11), a motor (2), a transmission mechanism (3), a rotating part (4) and a whole cover body (12). The whole cover body (12) is arranged on the upper end face of the base body (1). The motor (2) and the transmission mechanism (3) are both arranged in the bin body (11). The transmission mechanism (3) is connected to the motor (2), and the transmission mechanism (3) is also connected to the rotating part (4). The motor (2) can drive the rotating part (4) to rotate through the transmission mechanism (3). The whole cover body (12) is connected to the rotating part (4), and the whole cover body (12) can rotate together with the rotating part (4).

2. The overall rotating base according to claim 1, characterized in that: An accommodating part is formed at the upper end of the rotating part (4). A corresponding convex column (121) is arranged on the back of the whole cover body (12). The convex column (121) can be inserted into the accommodating part so that the whole cover body (12) can rotate together with the rotating part (4).

3. The overall rotating base according to claim 2, wherein: A support plate (13) is arranged at the upper end of the base body (1). A through hole is arranged at the middle position of the support plate (13). A plurality of balls (131) are arranged on the support plate (13). A plurality of guiding columns (122) are arranged on the back of the whole cover body (12). The guiding columns (122) can be positioned at the edge of the through hole so that the whole cover body (12) can rotate within the range where the guiding columns (122) can rotate. The back of the whole cover body (12) is in contact with the balls (131) and forms a rolling connection.

4. The overall rotating base according to claim 3, characterized in that: It further includes a conductive part (5) and a power source (6). A part of the conductive part (5) is arranged on the rotating part (4). When the motor (2) drives the rotating part (4) and a part of the conductive part (5) to rotate through the transmission mechanism (3), the conductive part (5) can always form an electrical connection. The conductive part (5) is electrically connected to the power source (6). The power source (6) is also electrically connected to the motor (2) and provides electrical energy for the motor (2).

5. The overall rotating base according to claim 4, wherein: The conductive part (5) includes two conductive rings (51), two conductive elastic parts (52) and a conductive main body (53). The two conductive rings (51) are arranged at the lower end of the rotating part (4). The two conductive elastic parts (52) and the conductive main body (53) are electrically connected. One of the conductive elastic parts (52) is electrically connected to one of the conductive rings (51), and the other conductive elastic part (52) is electrically connected to the other conductive ring (51).

6. The overall rotating base according to claim 5, wherein: The conductive elastic part (52) is a spring. When the conductive ring (51) rotates following the rotating part (4), the conductive elastic part (52) is always in contact with the conductive ring (51).

7. The integral rotating base according to claim 6, characterized in that: The whole rotating part (4) is cylindrical, and the cross-section of the conductive ring (51) is circular ring-shaped.

8. The integral rotating base according to claim 7, wherein: The bin body (11) includes an upper bin body (111) and a lower bin body (112). The upper bin body (111) and the lower bin body (112) form an accommodating space, and the motor (2) and the transmission mechanism (3) are both arranged in the accommodating space.

9. The integral rotating base according to any one of claims 1 to 8, characterized in that: The transmission mechanism (3) includes a transmission pulley set (31) and a gear set (32). The transmission pulley set (31) is connected to the motor (2), the gear set (32) is connected to the transmission pulley set (31), and the motor (2) is connected to the rotating part (4) through the transmission pulley set (31) and the gear set (32) in sequence.

10. The integral rotating base according to claim 9, wherein: The transmission pulley set (31) includes a first transmission pulley (311), a belt (312) and a second transmission pulley (313). The first transmission pulley (311) is coaxially connected to the output shaft of the motor (2). One end of the belt (312) is sleeved on the first transmission pulley (311), and the other end is sleeved on the second transmission pulley (313). The second transmission pulley (313) is connected to the gear set (32). The gear set (32) includes a plurality of gears. The plurality of gears are sequentially meshed with each other to form a speed reduction structure. One of the gears is coaxially connected to the second transmission pulley (313), and another gear is coaxially connected to the rotating part (4).