CN113074224A

CN113074224A - Rotating shaft assembly, transmission device and electronic equipment

Info

Publication number: CN113074224A
Application number: CN202110315098.XA
Authority: CN
Inventors: 符勇
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-07-06
Anticipated expiration: 2041-03-24
Also published as: CN113074224B

Abstract

The application provides a rotating shaft assembly, which comprises a rotating shaft, at least one belt wheel sleeved on the rotating shaft and at least two shaft sleeves sleeved on the rotating shaft; the at least two shaft sleeves are arranged at intervals along the axial direction of the rotating shaft and are respectively and fixedly connected with the rotating shaft; each belt wheel is arranged between two adjacent shaft sleeves, each belt wheel is provided with two end parts which are oppositely arranged along the axial direction of the rotating shaft, and the two end parts of each belt wheel are fixedly connected with the two adjacent shaft sleeves respectively. The pivot subassembly that this application embodiment provided is through with axle sleeve and pivot fixed connection to with band pulley and axle sleeve fixed connection, with the synchronism when keeping the pivot subassembly to rotate.

Description

Rotating shaft assembly, transmission device and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment structures, in particular to a rotating shaft assembly, a transmission device and electronic equipment.

Background

The flexible screen, i.e., the flexible OLED (Organic Light-Emitting Diode) screen, has the characteristics of being bendable at will, being Light and thin in material, saving power, and the like, and with the development of the flexible screen technology, the flexible screen device is pushed to become the mainstream of screen display in the future.

However, in the related art, electronic devices (mobile phones, tablet computers, notebook computers, wearable devices, etc.) using flexible screens are stored in the electronic devices in a folding and shrinking manner. The flexible screen is limited in the containing space of the electronic equipment, and the area reduced by the flexible screen after folding and shrinking is limited.

Disclosure of Invention

One aspect of the embodiment of the present application provides a rotating shaft assembly, which includes a rotating shaft, at least one belt wheel sleeved on the rotating shaft, and at least two shaft sleeves sleeved on the rotating shaft; the at least two shaft sleeves are arranged at intervals along the axial direction of the rotating shaft and are respectively and fixedly connected with the rotating shaft; each belt wheel is arranged between two adjacent shaft sleeves, each belt wheel is provided with two end parts which are oppositely arranged along the axial direction of the rotating shaft, and the two end parts of each belt wheel are fixedly connected with the two adjacent shaft sleeves respectively.

On the other hand, the embodiment of the application further provides a transmission device, which comprises a first rotating shaft assembly, a second rotating shaft assembly and transmission pieces, wherein the first rotating shaft assembly and the second rotating shaft assembly are arranged at intervals, and the transmission pieces are annular and are respectively sleeved on two sides of the first rotating shaft assembly, which are opposite to each other, of the second rotating shaft assembly; wherein, each first pivot subassembly and second pivot subassembly all include: the belt wheel comprises a rotating shaft, at least one belt wheel sleeved on the rotating shaft and at least two shaft sleeves sleeved on the rotating shaft; the at least two shaft sleeves are arranged at intervals along the axial direction of the rotating shaft and are respectively fixedly connected with the rotating shaft; each belt wheel is arranged between two adjacent shaft sleeves, each belt wheel is provided with two end parts which are oppositely arranged along the axial direction of the rotating shaft, and the two end parts of each belt wheel are fixedly connected with the two adjacent shaft sleeves respectively.

In another aspect, an electronic device is provided, where the electronic device includes a flexible screen and an actuator as described in the foregoing embodiments; the flexible screen is configured to be capable of being partially wound on the outer side of the transmission device; the transmission part of the transmission device moves to drive the flexible screen to move synchronously so as to realize the expansion or the furling of the flexible screen.

The pivot subassembly, transmission and electronic equipment that this application embodiment provided is through with axle sleeve and pivot fixed connection to with band pulley and axle sleeve fixed connection, in order to keep the synchronism when the pivot subassembly rotates. Simultaneously through setting up annular driving medium and locating this driving medium cover respectively first pivot subassembly and the both sides that the second pivot subassembly carried on the back mutually to the effort through driving medium transmission pivot subassembly realizes the simultaneous movement of flexible screen and pivot subassembly. In addition, when the flexible screen and the rotating shaft component move synchronously, the flexible screen part can be wound on the outer side of the transmission device, so that the small display area can be realized when the screen is folded, and the large display area can be realized when the screen is unfolded.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a flexible screen of an electronic device of some embodiments of the present application when collapsed;

FIG. 2 is a schematic structural diagram of the electronic device in FIG. 1 when the flexible screen is unfolded;

FIG. 3 is a schematic diagram of the electronic device in FIG. 2 with a split structure;

FIG. 4 is a schematic cross-sectional view taken along A-A of the electronic device in the embodiment of FIG. 1;

FIG. 5 is a schematic cross-sectional view of the electronic device of FIG. 2 along the direction B-B;

FIG. 6 is a schematic view of the flexible screen of some embodiments of the present application when collapsed;

FIG. 7 is a schematic view of a flexible screen in some embodiments of the present application in an expanded configuration;

FIG. 8 is a schematic illustration of the structure of a transmission according to some embodiments of the present application;

FIG. 9 is a schematic structural diagram of a first spindle assembly of the embodiment of FIG. 8;

FIG. 10 is a schematic, exploded view of the first spindle assembly of the embodiment of FIG. 9;

FIG. 11 is a schematic view of the connection of the first pulley and the second bushing of the embodiment of FIG. 9;

FIG. 12 is a cross-sectional schematic view of the first spindle assembly of the embodiment of FIG. 9;

fig. 13 is a schematic structural component diagram of a mobile terminal device in other embodiments of the present application.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

It should be noted that the electronic device in the embodiment of the present application is mainly directed to an electronic device having a flexible screen structure, where the flexible screen is folded or unfolded in the electronic device in a telescopic manner. It can be understood that the electronic device in the present application may include a mobile phone, a tablet computer, a notebook computer, a wearable device, and other electronic devices having a flexible screen structure.

The flexible screen becomes the trend of the future whole machine design scheme, and the flexible screen mainly brings the advantage of improving the screen occupation ratio of the whole machine. By utilizing the characteristic that the flexible screen can be bent at will, the display panel can be designed into various shapes according to requirements, such as a display panel structure which can be curled or folded.

Based on this, the applicant found in research that the flexible screen has a limited area to be reduced by adopting the folding display panel structure, and the area of the flexible screen can be reduced by half by adopting the folding display panel structure.

In order to solve the above problem, an embodiment of the present application provides an electronic device, so as to have a smaller display area when the flexible screen is folded, and have a larger display area when the flexible screen is unfolded.

Referring to fig. 1 to 3, fig. 1 is a schematic structural view of an electronic device in some embodiments of the present application when a flexible screen is folded, fig. 2 is a schematic structural view of the electronic device in the embodiment of fig. 1 when the flexible screen is unfolded, and fig. 3 is a schematic structural view of the electronic device in the embodiment of fig. 2 when detached. The electronic device may generally include a flexible screen 100, a housing 200, an actuator 300, a telescoping support assembly 400, and a drive 500; the housing 200 generally includes a first housing 210 and a second housing 220.

The housing 200 has a receiving space 201, and the transmission device 300 is disposed in the receiving space 201. The first housing 210 is a substantially groove-shaped structure, and the groove-shaped structure forms the accommodating space 201 of the housing 200. The second housing 220 is disposed corresponding to the groove opening position of the first housing 210, and is configured to be able to move away from or close to the first housing 210.

The flexible screen 100 covers the groove opening position of the first housing 210, and is configured to be capable of extending or retracting with respect to the first housing 210. When the flexible screen 100 is extended relative to the first housing 210, a large screen display effect can be achieved, and the second housing 220 is moved away from the first housing 210, and the telescopic support assembly 400 is supported on a portion of the flexible screen 100 extending out of the first housing 210. When the flexible screen 100 is retracted into the first casing 210, a small-screen display effect can be achieved, at this time, the telescopic support assembly 400 is retracted into the first casing 210, and the first casing 210 and the second casing 220 are jointly supported on the exposed portion of the flexible screen 100. At this time, part of the flexible screen 100 is accommodated in the first casing 210, and part of the flexible screen 100 which is not accommodated in the first casing 210 covers the opening of the groove of the first casing 210, so as to achieve the small screen display effect.

Wherein one end of the flexible screen 100 is connected to the actuator 300 and the other end is connected to the second housing 220 and/or the telescopic support assembly 400, such that the flexible screen 100 is configured to be capable of telescoping with the movement of the second housing 220 and/or the telescopic support assembly 400.

In this embodiment, the flexible screen 100 includes a connecting end 110 and a free end 120, which are oppositely disposed, and the connecting end 110 and the free end 120 are opposite ends of the flexible screen 100 in the telescopic direction. Wherein the connecting end 110 is connected with the actuator 300 such that the free end 120 can move relative to the connecting end 110 in the telescopic direction of the flexible screen 100. The telescopic support assembly 400 can be synchronously telescopic with the flexible screen 100 and support the flexible screen 100. One end of the telescopic supporting assembly 400 is connected to the first housing 210, and the other end is connected to the second housing 220. The end of the telescopic support assembly 400 connected to the second housing 220 can be telescopically moved in synchronization with the movement of the second housing 220. The free end 120 of the flexible screen 100 may be attached to the second housing 220 and/or the telescoping support assembly 400 is attached to the end of the second housing 220.

For example, the free end 120 of the flexible screen 100 is connected to the second housing 220 and moves telescopically in synchronization with the movement of the second housing 220. As another example, the free end 120 of the flexible screen 100 is connected to the end of the telescopic support assembly 400 connected to the second housing 220 and moves telescopically in synchronization with the telescopic movement of the telescopic support assembly 400. The free end 120 of the flexible screen 100 is connected to both the second housing 220 and the end of the telescoping support assembly 400 connected to the second housing 220 and moves telescopically in unison with the movement of the second housing 220 and the telescoping support assembly 400. When the flexible screen 100 is unfolded, the telescopic support assembly 400 supports the portion of the flexible screen 100 protruding from the first housing 210; when the flexible screen 100 is folded, the telescopic support assembly 400 is retracted inside the first housing 210, reducing the volume of the electronic device. It should be noted that, the embodiment of the present application is not limited to a specific structure of the telescopic support assembly 400, and may be, for example, a telescopic rod set structure, a sliding plate chute structure, etc.

The driving mechanism 500 is disposed inside the first housing 210, and is used for driving the transmission device 300 to move, so as to provide a stable driving force for the flexible screen 100 to extend and retract. Under the driving of the driving mechanism 500, the transmission device 300 drives the flexible screen 100 to fold or unfold. When the flexible screen 100 is unfolded, the flexible screen 100 can realize a large-screen display effect, so as to improve the user experience. When the flexible screen 100 is folded, the whole volume of the electronic device is small, and the electronic device is convenient to carry.

In this embodiment, the driving mechanism 500 may be a motor, and a rotating shaft of the motor may be in transmission connection or meshing connection with the transmission device 300, so as to drive the transmission device 300 to move when the rotating shaft of the motor rotates, and further drive the flexible screen 100 to move synchronously. It is understood that the drive mechanism 500 may be other mechanisms such as a lead screw drive mechanism, a worm gear drive mechanism, etc. In addition, the electronic device may further include a circuit board, a power supply, and other control devices disposed in the accommodating space 201, wherein the circuit board is electrically connected to the flexible screen 100 to provide a corresponding control signal to the flexible screen 100 and control the display of the flexible screen 100. Further, the circuit board is electrically connected to the driving device 500 to control the driving device 500 to provide the driving force. The electronic equipment that this embodiment provided, through the motion of signal of telecommunication control drive arrangement, and then the flexible screen of control is flexible, can realize the automation of flexible screen and expand and draw in, promotes user experience.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Referring to fig. 4 and 5 in combination, fig. 4 is a schematic cross-sectional structure of the electronic device along a-a direction in the embodiment of fig. 1, and fig. 5 is a schematic cross-sectional structure of the electronic device along a-B direction in the embodiment of fig. 2. It will be appreciated that the cross-sectional positions of fig. 4 and 5 are substantially the same, i.e. cut substantially at the respective areas of the electronic device in different states. When the flexible screen 100 is folded, the flexible screen 100 is partially wound around the outside of the transmission device 300, and at this time, the flexible screen 100 is in a small screen display state.

In this embodiment, the flexible screen 100 is configured to be partially wound around the outside of the actuator 300. As shown in fig. 4, when the flexible screen 100 is folded, the first housing 210 and the second housing 220 are coupled to support the exposed portion of the flexible screen 100. At this time, the flexible screen 100 is partially accommodated in the accommodating space 201 of the housing 200, and is partially wound around the outside of the transmission 300. As shown in fig. 5, when the flexible screen 100 is unfolded, the second housing 220 moves away from the first housing 210, and the moving direction of the free end of the flexible screen 100 coincides with the moving direction of the second housing 220. In other words, the free end of the flexible screen 100 is able to move in the telescopic direction of the flexible screen 100 relative to the connected end of the flexible screen 100. When the flexible screen 100 needs to be folded, the free end moves toward the connection end, and when the flexible screen 100 needs to be unfolded, the free end moves away from the connection end.

The transmission device 300 is disposed in the first housing 210 and connected to an inner sidewall of the first housing 210 opposite to the inner sidewall. In this implementation, the electronic device may further include a power supply 600, and the power supply 600 is disposed in the first housing 210 for supplying power to the driving mechanism 500.

Further, the electronic device in this embodiment may further include a secondary screen assembly 800, where the secondary screen assembly 800 is configured to shield the non-display surface of the flexible screen 100 when the flexible screen 100 is flattened, so as to ensure that the electronic device has a better appearance consistency as a whole. The secondary screen assembly 800 may generally include a secondary screen 810 and a secondary shaft 820, wherein the secondary shaft 820 is disposed in the first housing 210 and connected to an inner sidewall of the first housing 210 opposite to the secondary screen. The sub-screen 810 has one end connected to the sub-shaft 820 and the other end connected to the second housing 220. The sub-screen 810 is configured to be wound around the outer side of the sub-shaft 820. When the flexible screen 100 is folded, a part of the sub-screen 810 is wound around the outer side of the sub-shaft 820, and another part of the sub-screen 810 passes between the transmission 300 and the telescopic support assembly 400 to connect the second housing 220. When the flexible screen 100 is unfolded, the second housing 220 moves towards a direction away from the first housing 210, the part of the auxiliary screen 810 wound on the outer side of the auxiliary shaft 820 is gradually released and keeps moving synchronously with the second housing 220, and then the part of the second housing 220 protruding out of the first housing 210 is shielded when the flexible screen 100 is unfolded.

According to the electronic equipment provided by the embodiment of the application, the flexible screen is configured to be partially wound on the outer side of the transmission device, so that the flexible screen is driven to move synchronously when the transmission device moves, and the flexible screen is unfolded or folded. In the process, the flexible screen part is wound on the outer side of the transmission device, so that the risk of failure caused by folding of the flexible screen is avoided. In addition, when the flexible screen is folded, the electronic equipment is in a small-screen display state, and the whole volume of the electronic equipment is small and convenient to carry; when the flexible screen is unfolded, the electronic equipment is in a large-screen display state, so that the use experience of a user is improved.

Further, please refer to fig. 6 and 7 in combination, in which fig. 6 is a schematic structural diagram of the flexible screen 100 in some embodiments of the present application when folded, and fig. 7 is a schematic structural diagram of the flexible screen 100 in some embodiments of the present application when unfolded. When the flexible screen 100 is folded, the flexible screen 100 is partially wound around the outside of the transmission device 300, which can greatly reduce the display area of the flexible screen 100, and further reduce the overall volume of the electronic device, so as to facilitate carrying. When the flexible screen 100 is unfolded, the flexible screen wound around the outside of the actuator 300 is gradually released, so that the display area of the flexible screen 100 is gradually increased. The applicant has verified that the display area of the flexible screen 100 in the embodiment is at least 3-5 times larger than the display area of the flexible screen 100 in the embodiment.

It should be noted that, the flexible screen is at flexible in-process, if the effort that transmission applied to the flexible screen is inhomogeneous, must make the flexible process of flexible screen not smooth, still can make the flexible screen produce the fold at flexible in-process even, is unfavorable for the user to use.

Based on this, this application embodiment still provides a transmission who is applied to above-mentioned electronic equipment to provide even effort to the flexible screen, make the flexible screen can steadily stretch out and draw back, and then realize the uniform motion of flexible screen.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a transmission device 300 according to some embodiments of the present application, the transmission device 300 generally includes a first rotating shaft assembly 310, a second rotating shaft assembly 320, and a transmission member 330. The first rotating shaft assembly 310 and the second rotating shaft assembly 320 are arranged in parallel at intervals in the telescopic direction of the flexible screen 100. The transmission member 330 is substantially annular and is respectively sleeved on two opposite sides of the first rotating shaft assembly 310 and the second rotating shaft assembly 320.

The first and second

rotary shaft assemblies

310 and 320 are respectively connected to the driving mechanism 500 to be rotated by the driving mechanism 500. Wherein, the rotation directions of the first rotating shaft assembly 310 and the second rotating shaft assembly 320 are the same in the same movement process of the flexible screen 100. For example, during deployment of flexible screen 100, first and

second pivot assemblies

310 and 320 may each rotate in a clockwise direction. During the folding process of the flexible screen 100, the first rotating shaft assembly 310 and the second rotating shaft assembly 320 may both rotate in the counterclockwise direction.

The transmission member 330 may be a transmission belt, which is sleeved on opposite sides of the first rotating shaft assembly 310 and the second rotating shaft assembly 320 to move synchronously when the first rotating shaft assembly 310 and the second rotating shaft assembly 320 rotate. The connection end of the flexible screen 100 is attached to the transmission member 330.

In this embodiment, the transmission member 330 may be provided in a plurality, and the plurality of transmission members 330 are spaced along the axial extension direction of the first rotating shaft assembly 310 and the second rotating shaft assembly 320. Preferably, the plurality of transmission members 330 are uniformly distributed, and the connection ends of the flexible screen 100 are attached to the corresponding positions of the plurality of transmission members 300, so as to provide uniform acting force for the flexible screen 100 and further enable the flexible screen 100 to move at a uniform speed. Further, the connection end of the flexible screen 100 is attached to the same flush line on the plurality of transmission members 330, the same flush line is parallel to the axes of the first rotating shaft assembly 310 and the second rotating shaft assembly 320, that is, the edge line of the connection end of the flexible screen 100 departing from the free end thereof is parallel to the axes of the first rotating shaft assembly 310 and the second rotating shaft assembly 320. The surface of the transmission member 330 facing away from the first rotating shaft assembly 310 is flush with the corresponding surface of the first rotating shaft assembly 310, and the surface of the transmission member 330 facing away from the second rotating shaft assembly 320 is flush with the corresponding surface of the second rotating shaft assembly 320, so that the flexible screen 100 can be smoothly wound on the outer side of the transmission device 300, or smoothly released from the transmission device 300, and wrinkles of the flexible screen 100 in the expansion and contraction process are avoided.

In this embodiment, the number of the transmission members 330 may be 3, and the two end portions and the middle portion of the first rotating shaft assembly 310 and the second rotating shaft assembly 320 are respectively provided with 3 transmission members, so as to support and pull the two opposite sides and the middle portion of the flexible screen 100, and further provide uniform acting force for the flexible screen 100, so that the flexible screen 10 can be smoothly stretched at a uniform speed.

The transmission that this application embodiment provided, through setting up the axis extending direction evenly distributed of a plurality of driving mediums along first pivot subassembly and second pivot subassembly, and paste the link of flexible screen and locate the same line that flushes of a plurality of driving mediums, make transmission can provide even effort for flexible screen when driving flexible screen motion, avoid flexible screen at flexible in-process production fold, guarantee that flexible screen can stretch out and draw back smoothly at the uniform velocity, promote user's use and experience.

It will be appreciated that the first and

second shaft assemblies

310, 320 are substantially identical in construction, i.e., each of the first and

second shaft assemblies

310, 320 may include a shaft, a pulley, and a bushing. The embodiment of the present application is exemplified by the first rotating shaft assembly 310.

Referring to fig. 9 and 10, fig. 9 is a schematic structural diagram of the first rotating shaft assembly 310 in the embodiment of fig. 8, and fig. 10 is a schematic structural diagram of the first rotating shaft assembly 310 in the embodiment of fig. 9, where the first rotating shaft assembly 310 may generally include a rotating shaft 31, a pulley 32, and a bushing 33.

At least one belt wheel 32 is provided, and the at least one belt wheel 32 is sleeved on the rotating shaft 31. The number of the shaft sleeves 33 is at least two, and the shaft sleeves 33 are all sleeved on the rotating shaft 31 and are arranged at intervals along the axial direction of the rotating shaft 31. Each pulley 32 is disposed between two adjacent bushings 33. Further, the bushing 33 is fixedly coupled with the rotation shaft 31. The pulley 32 has two end portions disposed opposite to each other in the axial direction of the rotating shaft 31, and the two end portions of the pulley 32 are fixedly connected to the two adjacent bushings 33, respectively.

Specifically, one or more pulleys 32 may be provided, and each pulley 32 is provided between two adjacent bushings 33. For example, when one pulley 32 is provided, two bushings 33 are provided, and the pulley 32 is provided between the two bushings 33. At this time, the two bushings 33 are respectively located at both ends of the rotating shaft 31, and both ends of the one pulley 32 are respectively fixedly connected to the two bushings 33. The two bushings 33 are fixedly connected to the rotating shaft 31, so that the rotating shaft 31, the pulley 32 and the bushings 33 keep rotating synchronously when the first rotating shaft assembly 310 rotates.

As another example, when there are two pulleys 32, there are three bushings 33, and each pulley 32 is disposed between two adjacent bushings 33. At this time, the three bushings 33 are sequentially disposed at intervals, the two pulleys 32 are respectively disposed between the two adjacent bushings 33, two end portions of each pulley 32 are respectively fixedly connected to the two adjacent bushings 33, and the three bushings 33 are respectively fixedly connected to the rotating shaft, so that the rotating shaft 31, the pulleys 32, and the bushings 33 keep rotating synchronously when the first rotating shaft assembly 310 rotates.

For another example, three pulleys 32 are provided, four bushings 33 are provided, and each pulley 32 is provided between two adjacent bushings 33. At this time, the four bushings 33 are sequentially disposed at intervals, the three pulleys 32 are respectively disposed between two adjacent bushings 33, two end portions of each pulley 32 are respectively fixedly connected to two adjacent bushings 33, and the four bushings 33 are respectively fixedly connected to the rotating shaft 31, so that the rotating shaft 31, the pulleys 32, and the bushings 33 keep rotating synchronously when the first rotating shaft assembly 310 rotates.

In the embodiment, for example, three pulleys 32 are provided, and four bushings 33 are provided, so that the transmission device 300 can provide uniform force to the flexible screen 100 when the flexible screen 100 is driven to move. The bushing 33 includes a first bushing 331, a second bushing 332, a third bushing 333, and a fourth bushing 334 that are sequentially spaced apart, and the pulley 32 includes a first pulley 321, a second pulley 322, and a third pulley 323 that are sequentially spaced apart. Wherein the distance between the first pulley 321 and the second pulley 322 is equal to the distance between the second pulley 322 and the third pulley 323.

Further, the first pulley 321 is disposed between the first sleeve 331 and the second sleeve 332, and two ends of the first pulley 321 are fixedly connected to the first sleeve 331 and the second sleeve 332, respectively. The second pulley 322 is disposed between the second sleeve 332 and the third sleeve 333, and two ends of the second pulley 322 are fixedly connected to the second sleeve 332 and the third sleeve 333, respectively. The third pulley 323 is disposed between the third shaft sleeve 333 and the fourth shaft sleeve 334, and both ends of the third pulley 323 are fixedly connected to the third shaft sleeve 333 and the fourth shaft sleeve 334, respectively.

In this embodiment, taking as an example that both ends of the first pulley 321 are fixedly connected to the first bushing 331 and the second bushing 332, respectively, the fixed connection manner of the second pulley 322, the third pulley 323, and other pulleys can refer to the fixed connection manner of the first pulley 321.

Referring to fig. 11, fig. 11 is a schematic structural diagram illustrating a connection between the first pulley 321 and the second bushing 332 in the embodiment of fig. 9, wherein a first engaging portion 3211 is disposed at an end of the first pulley 321 close to the second bushing 332, a second engaging portion 3322 is disposed at an end of the second bushing 332 close to the first pulley 321, and the first engaging portion 3211 and the second engaging portion 3322 cooperate to fixedly connect the first pulley 321 and the second bushing 332. Similarly, the connection mode of the first pulley 321 and the first sleeve 331 can refer to the connection mode of the first pulley 321 and the second sleeve 332.

Further, the first engaging portion 3211 is a boss structure extending axially along the rotating shaft 31, and the second engaging portion 3322 is a groove structure extending axially along the rotating shaft 31, the groove structure and the boss structure are adapted to limit and fix the first pulley 321 in the circumferential direction and the axial direction of the rotating shaft through the first bushing 331 and the second bushing 332.

Of course, in other embodiments, the first engaging portion 3211 may be a groove structure extending along the axial direction of the rotating shaft 31, and the second engaging portion 3322 may be a boss structure extending along the axial direction of the rotating shaft 31, where the boss structure and the groove structure are adapted to limit and fix the first pulley 321 in the circumferential direction and the axial direction of the rotating shaft through the first bushing 331 and the second bushing 332. It can be understood that the limiting fixing manner of the second pulley 322 and the third pulley 323 in the circumferential direction and the circumferential direction of the rotating shaft can refer to the limiting fixing manner of the first pulley 321, and therefore, the description is omitted.

Referring to fig. 12 in combination, fig. 12 is a schematic cross-sectional structure view of the first rotating shaft assembly 310 in the embodiment of fig. 9, wherein the first rotating shaft assembly 310 may further include a fastener 34, and the bushing 33 is fixedly connected to the rotating shaft 31 through the fastener 34, so as to fixedly limit the bushing 33 in the circumferential direction and the axial direction of the rotating shaft 31. The fastener 34 may be a pin, a screw, or other structural members.

Specifically, the sleeve 33 is opened with a recess 35, and the opening of the recess 35 faces a direction away from the rotating shaft 31 of the sleeve 33. In other words, the surface of the sleeve 33 facing away from the rotating shaft 31 is recessed toward the rotating shaft 31 to form the groove 35. The fastening member 34 extends from the bottom wall of the recess 35 into the interior of the rotating shaft 31, so that the bushing 33 is fixedly connected with the rotating shaft 31 through the fastening member 34.

In the present embodiment, the shaft sleeve 33 is provided with an annular groove 35 circumferentially disposed along the rotating shaft 31, that is, the groove 35 is in an annular structure, and the axis thereof is substantially coincident with or parallel to the axis of the rotating shaft 31. Further, the fastening member 34 extends into the rotating shaft 31 from the bottom wall of the groove 35 and penetrates through the rotating shaft 31, that is, the fastening member 34 penetrates through the rotating shaft 31 and two opposite sides of the annular groove 35. It will be appreciated that the two ends of the fastening member 34 do not protrude from the surface of the sleeve 33 facing away from the rotating shaft 31 in a direction away from the rotating shaft 31, so as to avoid abutting against the flexible screen 100 when the flexible screen 100 is wound.

Of course, in other embodiments, the sleeve 33 may be fixedly connected to the rotating shaft 31 by interference fit. That is, the initial inner diameter of the bushing 33 is smaller than the outer diameter of the rotating shaft 31, so as to form a fixed connection manner of interference fit when the bushing 33 is sleeved on the rotating shaft 31. The sleeve 33 is made of elastic material such as rubber and plastic, which can be elastically deformed to some extent.

In the present embodiment, as described above, the bushing 33 may include the first bushing 331, the second bushing 332, the third bushing 333, and the fourth bushing 334 which are sequentially spaced apart, and the pulley 32 may include the first pulley 321, the second pulley 322, and the third pulley 323 which are sequentially spaced apart. The second shaft sleeve 332 and the third shaft sleeve 333 are respectively fixedly connected with the rotating shaft 31 through a fastener 34, and the first shaft sleeve 331 and the fourth shaft sleeve 334 are respectively in interference fit with the rotating shaft 31 to realize the fixed connection. That is, the fastening member 34 may include a first fastening member 341 and a second fastening member 342, the second bushing 332 is fixedly connected to the rotating shaft 31 by the first fastening member 341, and the third bushing 333 is fixedly connected to the rotating shaft 31 by the second fastening member 342.

It should be noted that the terms "first", "second" and "third" in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature.

It is understood that the second and

third shaft sleeves

332 and 333 are located between the first and

fourth shaft sleeves

331 and 334, i.e., the first and

fourth shaft sleeves

331 and 334 are respectively close to both ends of the rotating shaft 31. The first pulley 321 and the third pulley 323 are respectively close to both ends of the rotating shaft 31 for supporting the edge of the flexible screen 100. The second pulley 322 is located between the first pulley 321 and the third pulley 323 for supporting the middle of the flexible screen 100. In this regard, the lengths of the first and

fourth sleeves

331 and 334 in the axial direction of the rotary shaft 31 do not generally exceed the lengths of the second and

third sleeves

332 and 333 in the axial direction of the rotary shaft 31.

Preferably, the first sleeve 331 and the fourth sleeve 334 are substantially equal in length in the axial direction of the rotating shaft 31, and the second sleeve 332 and the third sleeve 333 are substantially equal in length in the axial direction of the rotating shaft 31. The lengths of the first and

fourth sleeves

331 and 334 in the axial direction of the rotary shaft 31 are generally not more than 1/4 the lengths of the second and

third sleeves

332 and 333 in the axial direction of the rotary shaft 31. For example, the lengths of the first and

fourth bushings

331 and 334 in the axial direction of the rotary shaft 31 are approximately 1/5 of the lengths of the second and

third bushings

332 and 333 in the axial direction of the rotary shaft 31. Since the first sleeve 331 and the fourth sleeve 334 have a small length in the axial direction of the rotating shaft 31, the fixation by the fastening member provided in the slot is not favorable for positioning. Based on this, in the present embodiment, the first shaft sleeve 331 and the fourth shaft sleeve 334 are respectively in interference fit with the rotating shaft 31 to achieve a fixed connection, and the second shaft sleeve 332 and the third shaft body 333 are respectively fixedly connected with the rotating shaft 31 through the fastener 41.

Further, the outer diameter of the pulley 32 is smaller than the outer diameter of the bushing 33, so that the surface of the pulley 32 facing away from the rotating shaft 31 and the surface of the bushing 33 facing away from the rotating shaft 31 are arranged in a step. In other words, the distance between the surface of the pulley 32 facing away from the rotating shaft 31 and the rotating shaft 31 is smaller than the distance between the surface of the bushing 33 facing away from the rotating shaft 31 and the rotating shaft 31, so that the surface of the pulley 32 facing away from the rotating shaft 31 and the surface of the bushing 33 facing away from the rotating shaft 31 are in a step structure. The transmission member 330 is in transmission connection with the pulley 32, and the surface of the transmission member 330 facing away from the pulley 32 and the surface of the bushing 33 facing away from the rotating shaft 31 are flush, so as to facilitate the smooth movement of the flexible screen 100.

Specifically, the pulleys 32 and the transmission members 330 are disposed in a one-to-one correspondence, the pulleys 32 are provided with convex teeth disposed at uniform intervals along the circumferential direction thereof, and the transmission members 330 are provided with convex teeth disposed at uniform intervals along the moving direction of the transmission members 330 on the inner surface close to the pulleys 32. The convex teeth of the belt wheel 32 and the convex teeth of the transmission member 330 are matched to realize the meshing transmission connection of the belt wheel 32 and the transmission member 330, so that the uniform movement of the transmission member 330 can be realized.

Further, the surface of the transmission member 330 meshed with the pulley 32 on the side facing away from the pulley 32 is flush with the surface of the bushing 33 facing away from the rotating shaft 31. When the connecting end of the flexible screen 100 is attached to the transmission member 330, the flexible screen 100 can be prevented from being wrinkled or protruded during attachment, and the flexible screen 100 can be ensured to move telescopically and smoothly and at a constant speed.

The transmission device that this application embodiment provided, the surface that deviates from the band pulley through making the driving medium and the surface that the axle sleeve deviates from the pivot flush to the link that avoids the flexible screen produces fold or arch when the laminating, and then make transmission device can provide even effort for the flexible screen when driving the flexible screen motion, avoid the flexible screen to produce the fold at flexible in-process, guarantee that the flexible screen can stretch out and draw back smoothly at the uniform velocity, promote user's use and experience.

Further, the pivot subassembly that this application embodiment provided through with axle sleeve and pivot fixed connection to with band pulley and axle sleeve fixed connection, in order to keep the synchronism when pivot subassembly rotates. In addition, through setting up a plurality of even band pulleys in interval, can provide even effort for the flexible screen, do benefit to the flexible screen that realizes wide screen or super wide screen and stretch out and draw back. It is to be understood that in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In addition, an embodiment of the present application further provides a mobile terminal device, please refer to fig. 13, where fig. 13 is a schematic diagram illustrating a structural composition of a mobile terminal device 900 in another embodiment of the present application, where the mobile terminal device 900 may be a mobile phone, a tablet computer, a notebook computer, a wearable device, and the like, and the mobile phone is taken as an example in the embodiment of the present application. The structure of the mobile terminal apparatus 900 may generally include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (i.e., the flexible screen 100 in the above-described embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980, a power supply 990, and the like. Wherein the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected with the processor 980; the power supply 990 serves to supply power to the entire mobile terminal apparatus 900.

Specifically, the RF circuit 910 is used for transmitting and receiving signals; the memory 920 is used for storing data instruction information; the input unit 930 is used for inputting information, and may specifically include a touch panel 931 and other input devices 932 such as operation keys; the display unit 940 may include a display panel 941 (i.e., the flexible screen 100 in the above embodiment), and the like; the sensor 950 includes an infrared sensor, a laser sensor, etc. for detecting a user approach signal, a distance signal, etc.; a speaker 961 and a microphone 962 are connected to the processor 980 through the audio circuit 960 for emitting and receiving sound signals; the wifi module 970 is used for receiving and transmitting wifi signals, and the processor 980 is used for processing data information of the mobile terminal device. With regard to the related technical features of the display panel, please refer to the description related to the flexible screen in the above embodiments, and detailed description thereof will not be provided here.

It is noted that the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A spindle assembly, comprising:

a rotating shaft;

at least one belt wheel sleeved on the rotating shaft;

at least two shaft sleeves sleeved on the rotating shaft;

the at least two shaft sleeves are arranged at intervals along the axial direction of the rotating shaft and are respectively and fixedly connected with the rotating shaft; each belt wheel is arranged between two adjacent shaft sleeves, each belt wheel is provided with two end parts which are oppositely arranged along the axial direction of the rotating shaft, and the two end parts of each belt wheel are fixedly connected with the two adjacent shaft sleeves respectively.

2. The rotating shaft assembly of claim 1 further comprising a fastener, wherein the shaft sleeve is fixedly connected with the rotating shaft through the fastener so as to fixedly limit the shaft sleeve in both the circumferential direction and the axial direction of the rotating shaft.

3. The rotating shaft assembly as claimed in claim 2, wherein the shaft sleeve is provided with a groove, and the opening of the groove faces to the direction of the shaft sleeve departing from the rotating shaft; the fastener certainly the diapire of recess stretches into inside the pivot, perhaps the fastener certainly the diapire of recess stretches into inside the pivot and run through the pivot.

4. The rotary shaft assembly as claimed in claim 3, wherein the sleeve defines an annular groove circumferentially disposed along the rotary shaft, and the fastening member extends through the rotary shaft and opposite sides of the annular groove.

5. The spindle assembly of any one of claims 2-4, wherein the bushing includes a first bushing, a second bushing, a third bushing, and a fourth bushing in spaced-apart relation in sequence, and the pulley includes a first pulley, a second pulley, and a third pulley in spaced-apart relation in sequence, the first pulley being disposed between the first bushing and the second bushing, the second pulley being disposed between the second bushing and the third bushing, and the third pulley being disposed between the third bushing and the fourth bushing; wherein, the second axle sleeve with the third axle sleeve passes through respectively the fastener with pivot fixed connection, first axle sleeve with the fourth axle sleeve respectively with pivot interference fit is in order to realize fixed connection.

6. The pivot assembly of claim 1 wherein the pulley has a first engagement portion at an end proximate the bushing, and a second engagement portion at an end proximate the pulley, the first and second engagement portions cooperating to fixedly connect the bushing and the pulley.

7. The rotary shaft assembly as claimed in claim 6, wherein the first engaging portion is a boss extending axially along the rotary shaft, the second engaging portion is a groove extending axially along the rotary shaft, and the groove is adapted to the boss; alternatively, the first and second electrodes may be,

the first clamping part is a groove which is formed by extending the rotating shaft in the axial direction, the second clamping part is a boss which is formed by extending the rotating shaft in the axial direction, and the boss is matched with the groove.

8. The spindle assembly of claim 1, wherein the outer diameter of the pulley is smaller than the outer diameter of the bushing such that a surface of the pulley facing away from the spindle is stepped from a surface of the bushing facing away from the spindle.

9. A transmission device is characterized by comprising a first rotating shaft assembly, a second rotating shaft assembly and transmission pieces, wherein the first rotating shaft assembly and the second rotating shaft assembly are arranged at intervals, and the transmission pieces are annular and are respectively sleeved on two sides of the first rotating shaft assembly, which are opposite to each other; wherein, each first pivot subassembly and second pivot subassembly all include:

the belt wheel comprises a rotating shaft, at least one belt wheel sleeved on the rotating shaft and at least two shaft sleeves sleeved on the rotating shaft; the at least two shaft sleeves are arranged at intervals along the axial direction of the rotating shaft and are respectively fixedly connected with the rotating shaft; each belt wheel is arranged between two adjacent shaft sleeves, each belt wheel is provided with two end parts which are oppositely arranged along the axial direction of the rotating shaft, and the two end parts of each belt wheel are fixedly connected with the two adjacent shaft sleeves respectively.

10. The transmission of claim 9, wherein the transmission member and the pulley are in meshing transmission connection; wherein, the surface that the driving medium deviates from the band pulley flushes with the surface that the axle sleeve deviates from the pivot.

11. An electronic device, characterized in that the electronic device comprises:

a transmission as claimed in claim 9 or 10;

a flexible screen configured to be partially windable on an outer side of the transmission;

the transmission part of the transmission device moves to drive the flexible screen to move synchronously so as to realize the expansion or the furling of the flexible screen.

12. The electronic device of claim 11, wherein the flexible screen includes an attachment end and a free end that are oppositely disposed, the attachment end being coupled to the actuator, the free end being movable relative to the attachment end in a telescoping direction of the flexible screen.

13. The electronic device of claim 12, wherein the transmission device comprises a plurality of sets of transmission members and pulleys, each of the transmission members being connected to a corresponding one of the pulleys; the connecting end of the flexible screen is attached to the plurality of transmission parts.

14. The electronic device of claim 13, wherein an edge line of the connecting end facing away from the free end is parallel to the hinge axis.

15. The electronic device according to any one of claims 11-14, further comprising a housing, wherein the housing has a receiving space, the transmission device is disposed in the receiving space, and an opening is formed in a side wall of the housing for unfolding or folding the flexible screen.