CN111447308A

CN111447308A - Rotating mechanism and electronic device

Info

Publication number: CN111447308A
Application number: CN202010220286.XA
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-07-24
Anticipated expiration: 2040-03-25
Also published as: CN111447308B

Abstract

The application discloses slewing mechanism and electron device. The rotating mechanism is used for an electronic device, the electronic device comprises a first part and a second part which is arranged in a rotating mode relative to the first part, and the rotating mechanism comprises a base; the transmission assembly is arranged on the base and comprises an even number of connected universal joints; the first rotating shaft is connected with the transmission assembly; and the second rotating shaft is connected with the transmission assembly, an even number of universal joints are used for transmitting power between the first rotating shaft and the second rotating shaft, the axial directions of the first rotating shaft and the second rotating shaft are the same, the rotating directions of the first rotating shaft and the second rotating shaft are opposite, the first rotating shaft is connected with the first part, and the second rotating shaft is connected with the second part. Therefore, the transmission assembly adopts a mode of even universal joints, the processing difficulty and the assembly difficulty can be reduced, the idle stroke phenomenon can be reduced, the first rotating shaft and the second rotating shaft can synchronously rotate, the first part and the second part can synchronously rotate, and the reliability of the rotating mechanism is improved.

Description

Rotating mechanism and electronic device

Technical Field

The present disclosure relates to electronic technologies, and particularly to a rotating mechanism and an electronic device.

Background

With the demand of users for electronic devices with large screens (such as mobile phones), the size of the display screen of the electronic device can reach 7 inches, but the electronic device is not portable when the size of the display screen is too large. As such, in the related art, the electronic device is designed to be foldable, and the foldable electronic device is matched through a plurality of pairs of gears, so that the electronic device realizes the folding function. However, due to the manufacturing precision and the assembling precision of the gears, the structure of the multiple pairs of gears is easy to cause idle running of gear transmission, so that two foldable parts in the electronic device cannot move synchronously.

Disclosure of Invention

The embodiment of the application provides a rotating mechanism and an electronic device.

The rotating mechanism of the embodiment of the present application is applied to an electronic device including a first portion and a second portion provided rotatably with respect to the first portion, and includes:

a base;

a drive assembly disposed at the base, the drive assembly including an even number of connected universal joints;

the first rotating shaft is connected with the transmission assembly and is connected with the first part; and

the even number of universal joints are used for transmitting power between the first rotating shaft and the second rotating shaft, the axial directions of the first rotating shaft and the second rotating shaft are the same, and the rotating directions of the first rotating shaft and the second rotating shaft are opposite.

The electronic device of the embodiment of the application comprises:

a first portion;

rotatably positioning said second portion relative to said first portion; and

in the rotating mechanism according to the above embodiment, the first rotating shaft is connected to the first portion, and the second rotating shaft is connected to the second portion.

In the slewing mechanism and the electronic device of this application embodiment, the mode that transmission assembly adopted even number universal joint can reduce the processing degree of difficulty and the assembly degree of difficulty to can reduce the idle running phenomenon, make first pivot and second pivot can synchronous rotation, thereby make first portion and second portion can synchronous rotation, improved slewing mechanism's reliability.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of an electronic device according to an embodiment of the present application.

Fig. 2 is another perspective view of an electronic device according to an embodiment of the present disclosure.

Fig. 3 is a schematic view of an electronic device according to an embodiment of the present application in a folded state.

Fig. 4 is another perspective view of the electronic device according to the embodiment of the present application.

Fig. 5 is a perspective view schematically illustrating a rotation mechanism according to an embodiment of the present application.

Fig. 6 is an exploded schematic view of a rotating mechanism according to an embodiment of the present application.

Fig. 7 is a schematic view of the internal structure of the rotating mechanism according to the embodiment of the present application.

FIG. 8 is a perspective view of a transmission assembly according to an embodiment of the present application.

Fig. 9 is a schematic plan view of a rotating mechanism according to an embodiment of the present application.

Fig. 10 is an exploded schematic view of a turning mechanism according to another embodiment of the present application.

FIG. 11 is an exploded view of another angle of a rotating mechanism according to another embodiment of the present application.

Fig. 12 is a schematic plan view of a rotating mechanism according to another embodiment of the present application.

Description of the main element symbols:

the electronic device comprises an electronic device 200, a first part 210, a second part 220, a flexible display screen 230, a rotating mechanism 100, a base 10, a first mounting shell 11, a first mounting structure 111, a first half hole 112, a first limit structure 113, a second mounting shell 12, a second mounting structure 121, a second half hole 122, a second limit structure 123, an avoidance space 124, a mounting space 13, a transmission assembly 20, a universal joint 21, a first universal joint 22, a first transmission part 221, a first connection part 222, a second transmission part 223, a second universal joint 23, a third transmission part 231, a second connection part 232, a fourth transmission part 233, a first gear 24, a second gear 25, a transmission shaft 26, a first rotating shaft 30, a second rotating shaft 40, a first connecting piece 50 and a second connecting piece 60.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the related art, the foldable phone realizes the synchronous movement of two parts of the electronic device through a multi-gear mechanism. In a synchronous motion mechanism with multiple gear pairs, synchronous motion can be realized only when the manufacturing precision and the assembly precision of gears are high. For example, in the assembly process of the gears, when the tolerance of the center distance of the gear pair is too large, a gap may occur between the two gears, the gear transmission may have idle running, and when the number of the gear pairs is more, the accumulated idle running amount may be more, so that the two parts of the electronic device cannot move synchronously. Therefore, the use of the multiple gear pair mechanism requires extremely high gear manufacturing accuracy and assembling accuracy to realize the synchronizing mechanism, which increases the cost of the entire rotating shaft.

Referring to fig. 1, the present application provides an electronic device 200, wherein the electronic device 200 may be any one of various types of computer system devices (e.g., a mobile phone in fig. 1) that is mobile or portable and performs wireless communication. Specifically, the electronic apparatus 200 may be a mobile phone, a portable game device, a laptop computer, a portable internet device, or the like.

The electronic device 200 according to the embodiment of the present application has a folding function. Alternatively, one portion of the electronic device 200 may be folded relative to another portion to reduce at least one dimension of the electronic device 200. For example, after the electronic device 200 is folded, the length of the electronic device 200 is reduced, so that the space occupied by the electronic device 200 is smaller, and the portability of the electronic device 200 is improved.

Specifically, in the embodiment of the present application, the electronic device 200 includes a first portion 210, a second portion 220, and the rotating mechanism 100, wherein the second portion 220 is rotatably disposed with respect to the first portion 210, and the rotating mechanism 100 connects the first portion 210 and the second portion 220. The rotation mechanism 100 is used to synchronize the movement of the first portion 210 with the second portion 220. For example, the rotating mechanism 100 may move the first portion 210 and the second portion 220 toward each other in a synchronized manner to move the electronic device 200 from the flat state to the folded state. For another example, the rotating mechanism 100 can move the first portion 210 and the second portion 220 away from each other synchronously to transform the electronic device 200 from the folded state to the flattened state.

Fig. 2 shows the electronic device 200 in a flattened state. Fig. 3 shows the electronic device 200 in a folded state.

In the embodiment of the present application, the first portion 210 may include a first frame, and the first frame may be used to mount components of the electronic device 200, for example, a battery of the electronic device 200 may be mounted in the first frame. The first frame body can be made of plastic and the like. Similarly, the second portion 220 may include a second housing that may be used to mount components of the electronic device 200, for example, components such as a main circuit board and a battery of the electronic device 200 may be mounted within the second housing. The second frame body can be made of plastic and the like.

As in the example of fig. 1, the number of the rotating mechanisms 100 is two. The two rotating mechanisms 100 are spaced apart, and the rotating mechanisms 100 are disposed on opposite sides of the first portion 210. As in the example of fig. 4, the number of the rotating mechanisms 100 is one, and the rotating mechanisms 100 are disposed at the intermediate positions of the first portion 210.

Therefore, in the present application, the specific number of the rotating mechanism 100 is not limited as long as the rotating mechanism 100 can move the first portion 210 and the second portion 220 synchronously.

Referring to fig. 2, in the embodiment of the present disclosure, the electronic device 200 may include a flexible display 230, and the flexible display 230 is disposed on the first portion 210 and the second portion 220. The flexible display 230 may be secured to the first portion 210 and the second portion 220 by bonding or the like. For example, glue may be disposed between the flexible display 230 and the first portion 210 and the second portion 220, such that the glue adhesively secures the flexible display 230.

It can be understood that, during the process of unfolding the electronic device 200 from the folded state, the flexible display 230 is also unfolded, so that the display size of the flexible display 230 as a whole is increased; during the folding process of the electronic device 200 from the flat state, the flexible display 230 is also folded, so that the display size of the flexible display 230 is reduced. Therefore, the display area of the flexible display 230 and the size of the electronic device 200 can be changed to meet different requirements of users.

Further, the flexible display 230 may be an Organic light-emitting diode (Organic L light-emitting diode, O L ED) display, which makes the flexible display 230 have good flexibility to improve the life of the flexible display 230 during the folding process.

In the embodiment of the present application, the rotating mechanism 100 includes a base 10, a transmission assembly 20, a first rotating shaft 30 and a second rotating shaft 40. A drive assembly 20 is provided on the base 10, the drive assembly 20 comprising an even number of connected universal joints 21.

The first rotating shaft 30 and the second rotating shaft 40 are both connected with the transmission assembly 20. The first shaft 30 is connected to the first portion 210. The second shaft 40 is connected to the second portion 220. An even number of universal joints 21 are used to transmit power between the first shaft 30 and the second shaft 40. The first and

second shafts

30 and 40 have the same axial direction. The first and

second shafts

30 and 40 are rotated in opposite directions.

In the rotating mechanism 100 of the embodiment of the present application, the transmission assembly 20 adopts an even number of universal joints 21, which can reduce the processing difficulty and the assembly difficulty, and can reduce the idle running phenomenon, so that the first rotating shaft 30 and the second rotating shaft 40 can synchronously rotate, and the first part 210 and the second part 220 can synchronously rotate, thereby improving the reliability of the rotating mechanism 100.

Specifically, in the single universal joint 21, the instantaneous angular velocity ratio of the input shaft and the output shaft of the universal joint 21 is not always equal to 1, whereas in the present embodiment, the universal joint 21 is used in pairs, which can eliminate the characteristic of the variable speed transmission of the universal joint 21, so that the first rotating shaft 30 and the second rotating shaft 40 can move synchronously.

In the embodiment of the present application, the number of universal joints 21 may be 2, 4, or the like. Two adjacent universal joints 21 may be directly connected or may be connected through other media. For example, the two connected universal joints 21 may be coupled by a coupling. Therefore, the specific connection manner of the adjacent two universal joints 21 is not limited herein.

In the embodiment of the present application, the base 10 is a bearing component of the rotating mechanism 100, or other components of the rotating mechanism 100 may be mounted on the base 10 and kept fixed in position. For example, the universal joint 21, the first rotating shaft 30 and the second rotating shaft 40 are all mounted on the base 10 and kept fixed in position, so that the rotating mechanism 100 can form a complete whole.

In the present embodiment, the base 10 is substantially block-shaped. Of course, the base 10 can be formed in different shapes according to different requirements, and the specific shape of the base 10 is not limited herein.

Referring to fig. 5 and 6, in some embodiments, the base 10 includes a first mounting shell 11 and a second mounting shell 12. The second mounting case 12 is detachably connected to the first mounting case 11. The first mounting case 11 and the second mounting case 12 together form a mounting space 13, and the transmission assembly 20 is accommodated in the mounting space 13.

In this way, the transmission assembly 20 accommodated in the installation space 13 can prevent foreign matters outside the base 10 from falling on the transmission assembly 20, so that the transmission accuracy of the transmission assembly 20 can be ensured. For example, the base 10 can prevent dust from falling on the universal joint 21 and affecting the angular speed of the transmission of the universal joint 21, and ensure that the first rotating shaft 30 and the second rotating shaft 40 can move synchronously.

Specifically, both the first mounting case 11 and the second mounting case 12 may be made of plastic through an injection molding process. The first mounting shell 11 and the second mounting shell 12 can be detachably connected by means of threads, snaps and the like, and the specific connection manner of the first mounting shell 11 and the second mounting shell 12 is not limited herein. The shape of the mounting space 13 may be specified according to the structure of the actuating assembly 20 as long as both the first mounting case 11 and the second mounting case 12 do not interfere with the actuating assembly 20.

Referring to fig. 6 and 7, in some embodiments, the even number of universal joints 21 includes a first universal joint 22 and a second universal joint 23 connected to the first universal joint 22, the transmission assembly 20 further includes a first gear 24 connected to the second universal joint 23 and a second gear 25 engaged with the first gear 24, the first rotating shaft 30 is connected to the first universal joint 22, and the second rotating shaft 40 is connected to the second gear 25.

In this way, the transmission assembly 20 can make the rotation directions of the first rotating shaft 30 and the second rotating shaft 40 opposite by the engagement of the first gear 24 and the second gear 25. Specifically, if the first rotating shaft 30 rotates in the clockwise direction, after the power of the first rotating shaft 30 is transmitted through the first universal joint 22 and the second universal joint 23, so that the first gear 24 also rotates in the clockwise direction, since the second gear 25 is meshed with the first gear 24, the rotation direction of the second gear 25 is counterclockwise, and further the second rotating shaft 40 rotates in the counterclockwise direction, and the purpose that the rotation directions of the first rotating shaft 30 and the second rotating shaft 40 are opposite is achieved, so that the first portion 210 and the second portion 220 of the electronic device 200 can synchronously rotate to approach or synchronously rotate to separate from each other.

Note that, in this embodiment, the number of the universal joints 21 is two, that is, the first universal joint 22 and the second universal joint 23. In addition, in this embodiment, the number of the first gear 24 and the second gear 25 is one each. In other embodiments, the sum of the numbers of the first gear 24 and the second gear 25 may be an even number so that the rotation directions of the first rotating shaft 30 and the second rotating shaft 40 may be reversed.

In the present embodiment, the first rotation shaft 30 and the first universal joint 22 may be integrally configured. For example, the first shaft 30 and a portion of the first gimbal 22 are non-detachable. Similarly, the first gear 24 is of unitary construction with the second universal joint 23. The second shaft 40 and the second gear 25 are an integral structure. Therefore, the number of parts of the rotating mechanism 100 is reduced, the assembly of the rotating mechanism 100 is facilitated, the assembly error of the rotating mechanism 100 can be reduced, and the transmission precision of the rotating mechanism 100 is improved.

In the embodiment of the present application, the second gear 25 and the second rotating shaft 40 are coaxially disposed, or a central axis of the second gear 25 and a central axis of the second rotating shaft 40 coincide with each other.

As shown in fig. 5, the second mounting case 12 is formed with an escape space 124, and the first gear 24 and the second gear 25 are partially located in the escape space 124. This allows the first gear 24 and the second gear 25 to each have an overlapping portion with the first mounting case 12, making the mechanism of the rotating mechanism 100 more compact.

Referring to fig. 7 and 8, in some embodiments, the first universal joint 22 includes a first transmission portion 221, a first connection portion 222 and a second transmission portion 223, the first transmission portion 221 is connected to the first rotating shaft 30, and the first connection portion 222 is connected to the first transmission portion 221 and the second transmission portion 223.

The second universal joint 23 includes a third transmission portion 231, a second connection portion 232, and a fourth transmission portion 233, the third transmission portion 231 is connected to the first gear 24, and the second connection portion 232 is connected to the third transmission portion 231 and the fourth transmission portion 233.

The transmission assembly 20 further includes a transmission shaft 26 connecting the second transmission portion 223 and the third transmission portion 231, and the transmission shaft 26, the second transmission portion 223 and the third transmission portion 231 are an integrated structure.

In this way, the transmission shaft 26, the second transmission part 223 and the third transmission part 231 are of an integral structure, so that the connection structure of the first universal joint 22 and the second universal joint 23 is simpler, and the transmission error between the first universal joint 22 and the second universal joint 23 can be reduced.

Specifically, the first connection portion 222 and the second connection portion 232 are both cross shafts. Alternatively, the first and second

universal joints

22 and 23 are both cross universal joints. The first transmission part 221 and the second transmission part 223 are of a bifurcated structure, and a cross shaft connects the first transmission part 221 and the second transmission part 223.

Of course, in other embodiments, the first gimbal 22 and/or the second gimbal 23 may be other types of gimbal structures, for example, the first gimbal 22 and the second gimbal 23 may be both rzeppa type or the like.

Further, the first transmission part 221 and the first rotation shaft 30 may be an integral structure. The fourth transmission part 233 and the first gear 24 may be integrally constructed. For example, the first transmission part 221 and the first rotation shaft 30 may be formed through an injection molding process. Similarly, the fourth transmission part 233 and the first gear 24 can also be formed by an injection molding process.

The first universal joint 22 is carried on the base 10 by a first shaft 30 and a drive shaft 26. The second universal joint 23 is carried on the base 10 by a mounting shaft of a drive shaft 26 and a first gear 24.

In the case of the transmission assembly 20 having the first gear 24 and the second gear 25, in some embodiments, the first rotating shaft 30 and the second rotating shaft 40 are located on opposite sides of the base 10. It can be understood that the first universal joint 22 and the second universal joint 23 have a transmission angle, in this case, the first rotating shaft 30 and the second rotating shaft 40 are respectively located at two opposite sides of the base 10, so that the layout of the first rotating shaft 30 and the second rotating shaft 40 can be adapted to the connection structure of the first universal joint 22 and the second universal joint 23, which is beneficial to making the rotating mechanism 100 more compact.

As shown in the orientation of fig. 9, the first rotary shaft 30 is located on the upper side of the base 10. The second rotating shaft 40 is located at the lower side of the base 10.

In the embodiment of the present application, the overall size of the rotating mechanism 100 can be changed by changing the angle between the first rotating shaft 30 and the transmission shaft 26 and/or changing the length of the transmission shaft 26 to change the center-to-center distance L between the first rotating shaft 30 and the second rotating shaft 40.

Referring to fig. 10 and 11, the first mounting housing 11 is formed with a first mounting structure 111, the second mounting housing 12 is formed with a second mounting structure 121, and the first mounting structure 111 and the second mounting structure 121 together limit the positions of the transmission assembly 20, the first rotating shaft 30 and the second rotating shaft 40. For example, the first mounting structure 111 has a first half-hole 112, the second mounting structure 121 has a second half-hole 122, the first half-hole 112 and the second half-hole 122 are connected to form a mounting hole, and the first rotating shaft 30 is rotatably inserted into the mounting hole.

Further, in some embodiments, the first mounting shell 11 is provided with a first limiting structure 113, the second mounting shell 12 is provided with a second limiting structure 123, and the first limiting structure 113 and the second limiting structure 123 cooperate to limit the movement of the first mounting shell 11 relative to the second mounting shell 12.

Thus, the first limiting structure 113 and the second limiting structure 123 can enable the first mounting shell 11 and the second mounting shell 12 to be stably connected together, and prevent the phenomenon that the interference between the first mounting shell 11 and the transmission assembly 20 and the interference between the second mounting shell 12 and the transmission assembly 20 cause the abnormal rotation of the transmission assembly 20.

In the embodiment of the present application, the first limiting structure 113 has a protrusion, and the second limiting structure 123 has a groove, and the protrusion is disposed in the groove. In this manner, the protrusion and recess engagement may limit movement of the first mounting shell 11 relative to the second mounting shell 12.

Of course, in other embodiments, the first limiting structure 113 may have a groove and the second limiting structure 123 may have a protrusion; alternatively, the first position-limiting structure 113 may have a groove and a protrusion, and the first position-limiting structure 113 may also have a groove and a protrusion, and the protrusion is disposed in the corresponding groove.

Referring to fig. 10 and 11, in some embodiments, the number of the even number of universal joints 21 is four, four universal joints 21 are sequentially connected, the first rotating shaft 30 is connected to the first universal joint 21, and the second rotating shaft 40 is connected to the last universal joint 21. Therefore, in this embodiment, the rotation directions of the first rotating shaft 30 and the second rotating shaft 40 can be made opposite by four universal joints 21. Since each universal joint 21 has a similar structure, the four universal joints 21 are connected in a matching manner, so that the rotating mechanism 100 is easier to manufacture, and the manufacturing cost of the rotating mechanism 100 is reduced.

It should be noted that, in this embodiment, the structure of two universal joints 21 that are adjacently connected may refer to the above connection structure of the first universal joint 22 and the second universal joint 23, and will not be described in detail here.

Further, the first rotating shaft 30 and the second rotating shaft 40 are both located on the same side of the base 10. Thus, the arrangement of the four universal joints 21 is compact, which is advantageous for miniaturization of the rotating mechanism 100. It is understood that the transmission angle between two adjacent universal joints 21 can be changed, so that the first rotating shaft 30 and the second rotating shaft 40 are located on the same side of the base 10. As shown in the orientation of fig. 12, the first and second

rotating shafts

30 and 40 are located at the upper side of the base 10.

Referring to fig. 4-6 again, in some embodiments, the rotating mechanism 100 further includes a first connecting member 50 and a second connecting member 60, the first connecting member 50 is fixedly connected to the first rotating shaft 30, and the second connecting member 60 is fixedly connected to the second rotating shaft 40. The first connector 50 is adapted to be fixedly connected to the first portion 210 and the second connector 60 is adapted to be fixedly connected to the second portion 220.

As such, the first and

second links

50 and 60 make it easy for the rotating mechanism 100 to connect the first and

second portions

210 and 220.

Specifically, the first connecting member 50 and the first rotating shaft 30 may be an integral structure. The first shaft 30 may have a cylindrical shape or other shapes. The first connector 50 may be fixedly attached to the first portion 210 by bonding, welding, threading, or the like. In the embodiment of the present application, the first connecting member 50 has a sheet shape. The first connecting element 50 is embedded in the first portion 210, so that the connection between the first connecting element 50 and the first portion 210 is relatively flat, which is beneficial to the compact structure of the electronic device 200.

Similarly, the second connecting member 60 and the second rotating shaft 40 may be a unitary structure. The second shaft 40 may have a cylindrical shape or other shapes. The second connector 60 may be fixedly attached to the second portion 220 by bonding, welding, threading, or the like. In the embodiment of the present application, the second connector 60 has a sheet shape. The second connector 60 is embedded in the second portion 220 so that the connection between the second connector 60 and the second portion 220 is relatively flat.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotation mechanism for an electronic device including a first portion and a second portion rotatably disposed with respect to the first portion, the rotation mechanism comprising:

a base;

2. The rotating mechanism according to claim 1, wherein the base comprises a first mounting shell and a second mounting shell detachably connected to the first mounting shell, the first mounting shell and the second mounting shell together form a mounting space, and the transmission assembly is accommodated in the mounting space.

3. The rotation mechanism of claim 2, wherein the first mounting shell is provided with a first stop feature and the second mounting shell is provided with a second stop feature, the first stop feature and the second stop feature cooperating to limit movement of the first mounting shell relative to the second mounting shell.

4. The rotating mechanism of claim 1 wherein the even number of universal joints includes a first universal joint and a second universal joint connected to the first universal joint, the transmission assembly further including a first gear connected to the second universal joint and a second gear in mesh with the first gear, the first shaft being connected to the first universal joint and the second shaft being connected to the second gear.

5. The rotating mechanism according to claim 4, wherein the first gimbal includes a first transmission portion, a first connection portion and a second transmission portion, the first transmission portion is connected to the first rotating shaft, and the first connection portion is connected to the first transmission portion and the second transmission portion;

the second universal joint comprises a third transmission part, a second connection part and a fourth transmission part, the third transmission part is connected with the first gear, and the second connection part is connected with the third transmission part and the fourth transmission part;

the transmission assembly further comprises a transmission shaft connected with the second transmission part and the third transmission part, and the transmission shaft, the second transmission part and the third transmission part are of an integrated structure.

6. The rotary mechanism as claimed in claim 4, wherein the first and second shafts are located on opposite sides of the base.

7. The rotating mechanism according to claim 1, wherein the even number of universal joints includes four universal joints, four universal joints are connected in series, the first rotating shaft is connected with the first universal joint, and the second rotating shaft is connected with the last universal joint.

8. The rotation mechanism of claim 7, wherein the first rotation shaft and the second rotation shaft are both located on the same side of the base.

9. The rotating mechanism according to claim 1, further comprising a first connecting member fixedly connected to the first rotating shaft and a second connecting member fixedly connected to the second rotating shaft, wherein the first connecting member is configured to be fixedly connected to the first portion and the second connecting member is configured to be fixedly connected to the second portion.

10. An electronic device, comprising:

a first portion;

rotatably positioning said second portion relative to said first portion; and

the rotating mechanism of any one of claims 1-9, wherein the first shaft is coupled to the first portion and the second shaft is coupled to the second portion.