CN213659902U

CN213659902U - Winding shaft and electronic equipment

Info

Publication number: CN213659902U
Application number: CN202023249762.5U
Authority: CN
Inventors: 赵勇
Original assignee: TCL Technology Group Co Ltd
Current assignee: TCL Technology Group Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-07-09
Anticipated expiration: 2030-12-28

Abstract

The application provides a coiling axle and electronic equipment, wherein, the coiling axle is used for convoluteing flexible screen, includes: the peripheral wall of the shaft body is used for fixedly connecting one end of the flexible screen; the transition piece is fixed on the peripheral wall of the shaft body, and the distance between the outer side wall of the transition piece and the shaft body is gradually increased from the first end to the second end of the transition piece until the distance is equal to the minimum distance between the outer side wall of the flexible screen and the shaft body; wherein, the one end that flexible screen was fixed on the axis body is close to the second end of transition piece, and the other end of flexible screen is from the first end of transition piece to the second end coiling. According to the winding shaft and the electronic equipment, stress received after the flexible screen is wound on the shaft body can be reduced and dispersed, and the flexible screen can be effectively protected from being damaged by the stress.

Description

Winding shaft and electronic equipment

Technical Field

The application relates to the technical field of electronic display, in particular to a winding shaft and electronic equipment.

Background

Flexible displays are display devices made of flexible materials that can be deformed and bent, also known as "electronic paper". Flexible displays are typically made using Organic Light-Emitting diodes (OLEDs).

The flexible screen is used as a high and new technology display screen, and at present, small-size flexible screen display equipment capable of automatically unfolding and rolling is available; one end of the flexible screen is fixed to the reel, and the other end serves as a free end to wind the flexible screen on the reel through the reel, which can reduce the size of the entire display apparatus.

However, in the process of winding the flexible screen onto the reel, when the flexible screen is wound to the second circle, the flexible screen of the second circle is lifted by the first circle due to the thickness of the flexible screen, and an abrupt step appears, and the flexible screen is subjected to a large stress at the abrupt step, so that the flexible screen is easily damaged.

SUMMERY OF THE UTILITY MODEL

The application provides a coiling axle and electronic equipment to in solving the correlation technique, flexible screen when coiling on the coiling axle, flexible screen can receive the effect of great stress, leads to the technical problem of bad flexible screen in the same direction as easily.

According to a first aspect of the present application, there is provided a winding shaft for winding a flexible screen, comprising:

the fixing part is arranged on the peripheral wall of the shaft body and is used for fixedly connecting one end of the flexible screen;

the peripheral wall of the shaft body is also provided with a transition piece, the transition piece protrudes out of the peripheral wall of the shaft body along the radial direction of the shaft body, and the transition piece is positioned at the rear end of the fixing part along the winding direction of the flexible screen; the height of the transition piece protruding out of the peripheral wall of the shaft body is gradually increased along the winding direction.

According to the embodiment of the application, the transition piece is arranged on the peripheral wall of the shaft body, and the radial height of the transition piece protruding out of the shaft body is gradually increased along the winding direction of the flexible screen; meanwhile, the transition piece is arranged at the rear end of the fixing part for fixing the flexible screen along the winding direction. Like this, when the flexible screen was convoluteed to the axis body, the transition piece can be gradually lifted the interval between flexible screen and the axis body for interval between flexible screen and the axis body is gradual change. Therefore, when the flexible screen is wound to the second circle, the flexible screen can be smoothly transited to the first circle, and when the flexible screen of the second circle covers the flexible screen of the first circle, the flexible screen of the first circle cannot be suddenly pushed away from the shaft body by the flexible screen of the first circle; therefore, the stress of the flexible screen after being wound on the shaft body can be reduced and dispersed, and the flexible screen can be effectively protected from being damaged by the stress.

In one possible embodiment, the distance between the outer side wall of the rear end of the transition piece in the winding direction and the shaft body is equal to the minimum distance between the outer side wall of the flexible screen and the shaft body.

In one possible embodiment, the rear end of the transition piece in the winding direction is arranged adjacent to the fastening section.

The condition that has great interval between transition piece and the flexible screen first circle can be avoided like this and the stress that receives after further having reduced the flexible screen coiling takes place.

In a possible design, the transition piece and the fixing portion are respectively located at two ends of the cross section of the shaft body, which are opposite in diameter.

Therefore, the eccentric effect caused by the transition piece can be avoided, and the stability of the flexible screen during winding is effectively guaranteed.

In one possible embodiment, the angle of rotation of the first end of the transition piece to the second end of the transition piece in the winding direction on the circumferential wall of the shaft body is less than or equal to 180 °.

Therefore, when the flexible screen is completely unfolded, the transition piece cannot lift the flexible screen, so that the smoothness of two display ends of the flexible screen can be ensured, and the display effect is good; and can facilitate determination of the axis of rotation of the winding shaft.

In a possible design mode, an avoiding groove is formed in the peripheral wall of the shaft body and is located at the rear end of the transition piece in the winding direction; the flexible screen is fixed one end on the axis body has integrated circuit chip, dodge the groove and be used for holding integrated circuit chip.

Therefore, the influence of the integrated circuit chip on the winding of the flexible screen is avoided, and the stress on the flexible screen after the flexible screen is wound is reduced; and, the installation of flexible screen on the winding shaft is convenient.

In one possible design, the number of the avoiding grooves is equal to the number of the integrated circuit chips.

Can guarantee the intensity of axis body like this to, can provide sufficient fixed position for the fixed of flexible screen, guarantee the fixed stability of flexible screen.

In a possible design mode, a positioning rib is further arranged on the peripheral wall of the shaft body along the axial direction of the shaft body, and the positioning rib is located on the rear side of the avoidance groove along the winding direction; the thickness of the positioning rib along the radial direction of the shaft body is the same as the maximum height of the transition piece; the positioning rib deviates from the side wall butt joint of the avoiding groove is arranged on the end face of the flexible screen, so that the flexible screen is positioned in connection with the shaft body.

By arranging the positioning ribs and arranging the positioning ribs along the axial direction of the shaft body, when one end of the flexible screen is fixed on the shaft body, the end part of the flexible screen can be abutted against the side wall of the positioning ribs, and the end part of the flexible screen is ensured to be parallel to the axial direction of the shaft body; therefore, the flexible screen can be prevented from being misplaced during winding; and, set the thickness of location muscle to the interval that equals the second end lateral wall of transition piece and axis body, like this, avoided the location muscle to lead to the fact the condition emergence of lifting to the flexible screen of second circle coiling.

The flexible screen and the peripheral wall of the shaft body are ensured to have enough fixed length, and enough pulling force can be provided for winding and straightening of the flexible screen.

In a possible design mode, the positioning ribs comprise two positioning ribs, and the two positioning ribs are respectively arranged at two axial ends of the shaft body.

Therefore, the material of the positioning rib can be saved, and the cost is saved; meanwhile, the flexible screen is positioned at two ends, so that dislocation can not occur when the flexible screen is wound.

In a possible design, the positioning rib includes a first positioning portion and a second positioning portion, the first positioning portion extends from an end of the shaft body to a center along an axial direction and abuts against an end surface of the flexible screen; the second positioning portion is arranged at the end portion of the shaft body and wound on the peripheral wall of the shaft body along the winding direction, and the second positioning portion is used for abutting against the end faces of the flexible screen at two ends in the axial direction of the shaft body.

Through set up second location portion on the perisporium at axis body both ends to, second location portion butt is on flexible screen edge axis body both ends's terminal surface. Like this, just can guarantee that flexible screen has certain clearance along the terminal surface at axis body both ends and the both ends of axis body, when convoluteing flexible screen, flexible screen just can not take place the friction with other spare parts at axis body both ends along the terminal surface at axis body both ends to flexible screen has effectively been protected.

In a possible design, the winding shaft further includes two flanges, the two flanges are respectively disposed at two ends of the shaft body, and the flanges protrude outward from the peripheral wall of the shaft body and protrude from the outer side wall of the transition piece; the flexible screen is located between the two flanges.

Therefore, the flexible screen can be limited between the two flanges, and the situation of dislocation during winding of the flexible screen is avoided.

According to a second aspect of the present application, there is provided an electronic device comprising: the winding shaft, the flexible screen and the bonding layer are provided by any possible implementation manner of the first aspect of the application;

one end of the flexible screen is fixedly connected to the peripheral wall of the winding shaft through the bonding layer, and the other end of the flexible screen is configured to be wound on the winding shaft.

In one possible embodiment, the adhesive layer is wound around the circumferential wall of the winding shaft to a length of 35 to 45 mm.

In one possible design, the flexible screen includes: a fixed end, a display area and a free end;

the fixed end is fixed on the peripheral wall of the winding shaft, one end of the display area is connected with the fixed end, and the other end of the display area is connected with the free end;

when the display area is completely unfolded, one end of the display area, which is connected with the fixed end, is located at one end, which is far away from the free end, of the diameter of the cross section of the winding shaft, which is parallel to the display area.

Like this, the display area that can be when being expanded the demonstration completely, the partial attached one side that deviates from the free end at the winding axle of display area to form the display effect of curved surface, increased electronic equipment's demonstration aesthetic feeling, promoted user experience.

In a possible design, the electronic device further includes a moving shaft connected to the free end, and the display area is unwound from the winding shaft when the moving shaft moves away from the winding shaft; when the moving shaft moves in a direction approaching the winding shaft, the display area is wound on the winding shaft.

The construction of the present application and other objects and advantages thereof will be apparent from the following detailed description taken in conjunction with the accompanying drawings, in which alternative embodiments are described.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a front view of a winding shaft provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of the overall structure of a winding shaft provided in the embodiment of the present application;

FIG. 4 is an enlarged partial view at B in FIG. 3;

FIG. 5 is a schematic overall structure diagram of another view angle of the winding shaft provided by the embodiment of the present application;

fig. 6 is a schematic overall structure diagram of an electronic device provided in an embodiment of the present application;

fig. 7 is a schematic overall structure diagram of another view angle of the electronic device provided in the embodiment of the present application;

fig. 8 is a top view of fig. 7 taken along line C-C.

Description of reference numerals:

10-a winding shaft; 20-a flexible screen;

11-a shaft body; 12-a flange; 21-a fixed end; 22-a display area; 23-free end;

111-a stationary part; 112-a transition piece; 113-avoidance groove; 114-positioning ribs;

1141-a first positioning part; 1142-a second position determining portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, the terms "first" and "second" 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" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "inner," "outer," "upper," "bottom," "front," "back," and the like, when used in the orientation or positional relationship indicated in FIG. 1, are used solely for the purpose of facilitating a description of the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

With the development of electronic information technology, electronic devices, especially electronic display devices, are widely used in a variety of scenes such as advertising media, furniture life, office work, and the like.

In order to reduce the occupied space of the display equipment and facilitate the storage of the display equipment; a flexible display screen or a flexible display manufactured by using an Organic Light-Emitting Diode (OLED) is highly playable because it can be bent and can be wound around a winding shaft, thereby reducing the occupied space of the display screen or the display screen, and is applied as a high and new display screen technology.

The flexible display screen or display capable of being wound usually has a winding shaft, one end of the flexible display screen or display is fixed on the winding shaft, the other end of the flexible display screen or display can be a free end or is fixed on a moving shaft, and the flexible display screen or display is unwound from the winding shaft along with the movement of the free end or the moving shaft; alternatively, the flexible display screen or display is wound around the winding shaft under rotation of the winding shaft. Thus, the occupied space of the display can be reduced, and the use interest of the user can be improved.

The end of the flexible display screen or display typically has a bezel board, for example, a sustain drive circuit board (X board), a scan drive board (Y board), and a data drive board (Z board). The display may further include a Flexible Printed Circuit (FPC), and the bezel is electrically connected to the flexible display screen through the FPC. An Integrated Circuit (IC) chip may be disposed on the flexible printed Circuit, so as to adjust or control the display content of the flexible display screen or the display.

It can be understood that the flexible display screen can display image and sound files such as pictures, videos or multimedia, and therefore, the flexible display screen can have a data input port. In some possible implementations, the data input port may be a Universal Serial Bus (USB) port. Of course, in some possible manners, the data to be displayed may also be input to the flexible display screen by Bluetooth (Bluetooth) or Wireless-Fidelity (WI-FI), and the like.

It should be noted that, the flexible display screen has many different applications, such as folding a mobile phone, winding a television, etc.; therefore, the electronic device which can have the flexible display screen can also have a controller, and the electronic device is controlled by a remote controller and the like. For example, in some specific examples, the remote controller may establish a signal connection with the electronic device by means of infrared rays or WI-FI, etc., so as to control the electronic device by means of the control signal.

Certainly, because the flexible display screen is wound on the winding shaft, when the flexible display screen is unfolded, in order to avoid damage to the flexible display screen caused by excessive tensile force, a zero point induction device can be arranged in the electronic equipment; when the free end of the flexible screen moves to the zero point induction device, the movement is stopped.

In the related art, the flexible screen is wound on the winding shaft, and after the flexible screen is wound for one circle, the flexible screen of the second layer can be pressed on the flexible screen of the first layer. Because the flexible screen has certain thickness, the position that the flexible screen of second layer and first layer flexible screen contact will have obvious displacement lifting like this, will have a sudden change step promptly. Thus, as the winding continues, the flexible screen is subjected to greater and greater compressive stresses at this location, which can easily result in the flexible screen being damaged.

To aforementioned technical problem, this application provides a winding axle, and main thinking lies in, sets up on winding axle's perisporium with the transition piece, comes the subassembly through the transition piece to lift the flexible screen and rolls the interval between the axle, can just be tangent with the lateral wall of first circle when the second circle cover of flexible screen is at first circle initial position. After the flexible screen is wound, the distance between the flexible screen and the winding shaft is changed linearly, and abrupt steps can not occur; therefore, the pressure stress on the flexible screen can be uniformly dispersed, and the flexible screen can be effectively protected from being damaged.

In a first aspect, referring to fig. 1 and 2, fig. 1 is a front view of a winding shaft provided in an embodiment of the present application, and fig. 2 is a sectional view taken along a line a-a in fig. 1. The embodiment of the present application provides a winding shaft 10, which is used for winding a flexible screen 10, and the winding shaft 10 includes:

the shaft body 11, the perisporium of shaft body 11 is equipped with fixed part 111, and fixed part 111 is used for the fixed connection flexible screen's one end.

Specifically, in this embodiment of the application, the shaft body 11 may be a hollow cylinder, a coil spring may be disposed inside the shaft body 11, and the rotation of the shaft body 11 is controlled by the change of the elastic potential energy of the coil spring, and the flexible screen is wound. Optionally, the shaft body 11 may also be driven by a driving device such as a servo motor or a synchronous motor to rotate, so as to wind the flexible screen.

Optionally, in this embodiment of the application, the material of the shaft body 11 may be a hard material such as stainless steel, which can provide sufficient strength to ensure that there is sufficient supporting force for the flexible screen when the flexible screen is unfolded.

Furthermore, the peripheral wall of the shaft body 11 can be a polished surface polished by polishing, so that in the winding process of the flexible screen, the flexible screen can be prevented from being scratched by small spurs, and the flexible screen can be effectively protected.

It is understood that in the embodiment of the present application, the diameter or radius of the shaft body 11 may be determined according to the minimum radius that the flexible screen can be wound around. For example, the radius of the shaft body 11 may be set to be equal to or slightly larger than the minimum radius around which the flexible screen can be wound. Like this, when flexible screen convolutes, can ensure that flexible screen is attached on the perisporium of axis body 11 completely, can guarantee promptly that axis body 11 is providing sufficient support to flexible screen all the time to effectively protect flexible screen.

As a specific example, the radius of the shaft body 11 may be 20 mm.

In this embodiment, a transition piece 112 is disposed on the peripheral wall of the shaft body 11, the transition piece 112 protrudes out of the peripheral wall of the shaft body 11 along the radial direction of the shaft body 11, the transition piece 112 is located at the rear end of the fixing portion 111 along the winding direction of the flexible screen (for example, the clockwise direction shown by the arc arrow in fig. 2), the height of the protrusion of the transition piece 112 and the peripheral wall of the shaft body 11 gradually increases along the winding direction, so that the distance component between the flexible screen and the shaft body 11 changes, and when the flexible screen is wound, the second ring covers the first ring for smooth transition.

It will be appreciated that in different implementations, the winding direction may also be counter-clockwise.

Specifically, in the embodiment of the present application, the transition element 112 may be a spring plate disposed on the peripheral wall of the shaft body 11, and one end of the spring plate is tangent to the peripheral wall of the shaft body 11 and is disposed near the rear end of the fixing portion 111 along the winding direction; the other end of the elastic sheet is gradually far away from the peripheral wall of the shaft body 11; therefore, the distance between the flexible screen and the shaft body 11 can be gradually changed, and abrupt change steps can not occur.

In some possible ways, the transition piece 112 may also be a series of ribs arranged on the peripheral wall of the shaft body 11, the thickness of the ribs gradually increasing in the winding direction, so that the distance between the flexible screen and the shaft body 11 can be gradually increased.

In the embodiment of the application, the transition piece 112 is arranged on the shaft body 11, and the radial height of the transition piece 112 protruding out of the shaft body 11 is gradually increased along the winding direction of the flexible screen; meanwhile, a transition piece 112 is provided at a rear end of the fixing portion 111 fixing the flexible screen in the winding direction. In this way, when the flexible screen winds up the shaft body, the transition piece 112 can gradually lift the distance between the flexible screen and the shaft body 11, so that the distance between the flexible screen and the shaft body 11 is gradually changed. Therefore, when the flexible screen is wound to the second circle, the flexible screen can be smoothly transited to the first circle, and when the flexible screen of the second circle is covered to the flexible screen of the first circle, the flexible screen of the second circle cannot be suddenly pushed to the shaft body 11 by the flexible screen of the first circle; therefore, the stress applied to the flexible screen after being wound on the shaft body 11 can be reduced and dispersed, and the flexible screen can be effectively protected from being damaged by the stress.

Further, the distance between the outer side wall of the transition piece 112 at the rear end in the winding direction and the shaft body 11 is equal to the minimum distance between the outer side wall of the flexible screen and the shaft body 11.

It will be appreciated that the spacing of the outer sidewall of the transition piece 112 from the shaft body 11 may refer to the spacing of the outer sidewall of the transition piece 112 from the circumferential wall of the shaft body 11 in the radial direction of the shaft body 11. In other references, the distance between the outer sidewall of the transition piece 112 and the shaft 11 may also refer to the distance between the outer sidewall of the transition piece 112 and the axis of the shaft 11 in the radial direction of the shaft 11.

It should be noted that the distance between the outer side wall of the transition piece 112 and the shaft body 11 and the minimum distance between the outer side wall of the flexible screen and the shaft body 11 are compared when the same reference is selected.

The rear end of the transition piece 112 in the winding direction is adjacent to the fixing portion 111. In this way, the transition piece 112 can be clamped between the flexible screen and the shaft body 11, and gradually raise the distance between the flexible screen and the peripheral wall of the shaft body 11, and an overlarge gap cannot exist between the rear end part of the transition piece 112 and the fixing part 111, that is, a large gap cannot exist between the rear end part of the transition piece 112 and the end part of the first circle of the flexible screen, so that the smooth transition of the second circle of the flexible screen to the first circle can be ensured.

It should be noted that, in the embodiment of the present application, the shaft body 11 may be configured as a cylinder, so that stress on the flexible screen caused by an edge can be reduced. However, when the transition piece 112 is provided on the peripheral wall of the cylindrical shaft body 11, the transition piece 112 causes a certain eccentric force to exist when the shaft body 11 rotates; therefore, it is necessary to re-determine the rotation axis of the shaft body 11, in order to facilitate the determination of the rotation axis and to reduce the eccentric influence of the transition piece 112. With continued reference to fig. 2, in the embodiment of the present application, the transition piece 112 and the fixing portion are respectively disposed at two ends (for example, positive and negative directions shown by the x axis in fig. 2) opposite to the diameter of the cross section of the shaft body 11.

Specifically, taking the coordinate axes in fig. 2 as an example, the fixing portion 111 is provided on the side of the shaft body 11 that is biased toward the positive x-axis direction; and the transition piece 112 may be located on the side of the shaft body 11 that is biased toward the negative x-axis direction. In this way, after one end of the flexible screen is fixed on the fixing part 111, the one end of the flexible screen and the transition piece 112 are balanced with each other, so that the eccentric effect caused by the transition piece 112 is weakened, and the stability of the winding shaft when the flexible screen is wound is ensured.

Optionally, since the transition piece 112 may gradually lift the distance between the flexible screen and the shaft body 11, after the flexible screen is completely unfolded from the winding shaft 10, the object to be displayed needs to be displayed, so that the flexible screen is required to provide a flat display area. In order to avoid the situation that the two ends of the flexible screen are not located in the same plane after the flexible screen is completely unfolded, it is necessary to ensure that the transition piece 112 does not contact with the flexible screen when the flexible screen is completely unfolded. Therefore, in the embodiment of the present application, the angle of rotation of the transition piece 112 in the winding direction on the peripheral wall of the shaft body 11 is controlled to be less than or equal to 180 °. Thus, when the flexible screen is fully deployed, the flexible screen may be in contact on the side of the shaft 11 opposite the transition piece 112, such that the transition piece 112 does not contact the flexible screen.

Specifically, taking fig. 2 as an example for explanation, the transition piece 112 is located on the side of the shaft body 11 shown in the negative x-axis direction and is deflected to the side shown in the positive y-axis direction; after the flexible screen is completely unfolded, the flexible screen can be connected to the side of the shaft body 11 shown in the positive x-axis direction and deflected to the side shown in the negative y-axis direction.

Like this, when the flexible screen expandes completely, the inner wall (non-display surface) of flexible screen can butt axis body 11 on the perisporium of the negative direction of y axle, consequently, transition piece 112 can not play the lifting effect to the flexible screen to can guarantee the planarization at flexible screen display both ends, the display effect is better.

In some possible implementations, in order to ensure that the transition piece 112 can provide sufficient supporting force for the flexible screen, referring to fig. 2, in the embodiment of the present application, the cross section of the transition piece 112 is configured to be a circular arc, and the inner side wall of the transition piece 112 is fixed on the peripheral wall of the shaft body 11, and the supporting of the flexible screen is achieved by gradually increasing the thickness of the transition piece 112 in the winding direction (i.e., the direction from the first end to the second end of the transition piece 112). Therefore, the strength of the transition piece 112 can be effectively ensured, and the supporting effect of the flexible screen is ensured.

It will be appreciated that the material of the transition piece 112 may be the same as the material of the shaft body 11, and the outer side wall of the transition piece 112 may also be a polished smooth surface.

Alternatively, the transition piece 112 may be integrally formed with the shaft body 11. For example, fusion casting. Therefore, one end of the outer side wall of the transition piece 112 can be ensured to be tangent to the peripheral wall of the shaft body 11, secondary processing is not needed, and processing cost can be saved. Alternatively, the transition piece 112 may be formed by performing secondary lathe machining on the shaft body 11.

As described above, one end of the flexible screen may be provided with a screen edge plate, and the other end without the screen edge plate is provided with a Chip On Flex (COF), which is a technique for fixing an IC to an FPC. Thus, the COF may be thicker than the thickness of the flexible panel. In some specific examples, the COF is 0.8mm thicker than the flexible screen. To facilitate the winding of the flexible screen and to avoid the stress effect due to the thickness of the COF. Referring to fig. 2 to 5, fig. 3 is a schematic overall structure diagram of a winding shaft provided in an embodiment of the present application, fig. 4 is a partially enlarged view at B in fig. 3, and fig. 5 is a schematic overall structure diagram of another viewing angle of the winding shaft provided in an embodiment of the present application. In the embodiment of the present application, the avoiding groove 113 is formed in the peripheral wall of the shaft body 11, and the avoiding groove 113 is located at the rear end of the transition piece 112 in the winding direction. Thus, the IC chip on the COF can be accommodated in the escape groove 113. The influence of the IC chip on the winding of the flexible screen can be avoided.

In some possible implementations, the depth of the relief groove 113 may be equal to or slightly greater than the thickness of the IC.

The relief groove 113 is formed to be recessed inward from the peripheral wall of the shaft body 11. In some possible examples, the avoiding groove 113 may be a notch provided along the axial direction of the shaft body 11. This can facilitate the forming of the groove 113.

Alternatively, since the COF at the end of the flexible panel may have a plurality of COFs, the COFs perform different functions, respectively; therefore, in the embodiment of the present application, the number of the avoiding grooves 113 may be set to be the same as the number of COFs. Can guarantee the intensity of axis body 11 like this to, can provide sufficient fixed position for the fixed of flexible screen, guarantee the fixed stability of flexible screen.

Alternatively, a plurality of avoiding grooves 113 are arranged at intervals in the axial direction of the shaft body 11.

With continued reference to fig. 3 to 5, in the embodiment of the present application, a positioning rib 114 is further disposed on the circumferential wall of the shaft body 11 along the axial direction of the shaft body 11, and the positioning rib 114 is located at the rear side of the avoiding groove 113 along the winding direction; the thickness of the positioning rib 114 in the radial direction of the shaft body 11 is the same as the maximum height of the transition piece 112. Thus, the positioning rib 114 does not lift the distance between the flexible screen and the shaft body 11, that is, the positioning rib 114 does not form compressive stress on the flexible screen.

The positioning rib 114 deviates from the side wall of the avoiding groove 113 and abuts on the end surface of the flexible screen so as to position the connection between the flexible screen and the shaft body 11.

Specifically, the positioning rib 114 may be a convex rib protruding outward from the sidewall of the shaft body 11. The positioning rib 114 may be a whole rib crossing both ends of the shaft body 11, and of course, in some possible examples, the positioning rib 114 may also be intermittently disposed on the peripheral wall of the shaft body 11 and arranged at intervals.

In the embodiment of the application, by arranging the positioning rib 114 and arranging the positioning rib 114 along the axial direction of the shaft body 11, when one end of the flexible screen is fixed on the fixing part 111, the end part of the flexible screen can be abutted against the side wall of the positioning rib 114, so that the end part of the flexible screen is ensured to be parallel to the axial direction of the shaft body 11; therefore, the flexible screen can be prevented from being misaligned when wound.

In a specific example, the number of the positioning ribs 114 may be two, and the two positioning ribs 114 are respectively disposed at two axial ends of the shaft body 11. Thus, the material used for the positioning rib 114 can be saved, and the cost can be saved.

Optionally, the positioning rib 114 includes a first positioning portion 1141 and a second positioning portion 1142, the first positioning portion 1141 extends from the end of the shaft body 11 to the center along the axial direction, and abuts against the end surface of the flexible screen; the second positioning portion 1142 is disposed at an end portion of the shaft body 11 and wound around a circumferential wall of the shaft body 11 along a winding direction, and the second positioning portion 1142 is configured to abut against end surfaces of the flexible screen at two ends in the axial direction of the shaft body 11.

The second positioning portions 1142 are provided on the circumferential walls of the two ends of the shaft body 11, and the second positioning portions 1142 abut against the end surfaces of the flexible screen along the two ends of the shaft body 11. Like this, just can guarantee that flexible screen has certain clearance along the terminal surface at 11 both ends of axis body and the both ends of axis body 11, when convoluteing flexible screen, flexible screen just can not take place the friction with other spare parts at 11 both ends of axis body along the terminal surface at 11 both ends of axis body to flexible screen has effectively been protected.

Specifically, the other component at the two ends of the shaft body 11 may be flanges 12, in this embodiment, two flanges 12 are respectively disposed at the two ends of the shaft body 11, and the flanges 12 protrude outward from the peripheral wall of the shaft body 11 and protrude out of the outer side wall of the transition piece 112. In this way, the flexible screen, when wound on the winding shaft 10, is confined by the two flanges 12, so that the flexible screen is located between the two flanges 12 without misalignment.

The winding shaft provided by the embodiment of the application can be connected with the shaft body 11 in a bonding mode when the flexible screen is wound in specific implementation. Specifically, an adhesive layer (not shown) may be provided on the fixing portion 111, the adhesive layer being located on the rear side of the positioning rib 114 in the winding direction.

Specifically, in the embodiment of the present application, the adhesive layer may be a double-sided tape with good adhesion performance.

In order to ensure the bonding performance of the double faced adhesive tape, the stability of the flexible screen fixed on the shaft body 11 is ensured; the thickness of the double-sided adhesive tape can be selected to be 0.15-0.3 mm thick, and in some specific examples, the thickness of the double-sided adhesive tape can be selected to be 0.2 mm.

From the foregoing description, it can be understood that the flexible screen itself has a certain thickness, and the thickness of the flexible screen is 0.22mm as an example in the present application. It can be seen that, since the adhesive layer has a certain thickness, the minimum distance between the outer side wall of the flexible screen and the shaft body 11 is the sum of the thickness of the flexible screen and the thickness of the adhesive layer. That is, the outer sidewall of the second end of the transition piece 112 is spaced from the shaft body 11 by the sum of the thickness of the flexible screen and the thickness of the adhesive layer. I.e. 0.42mm in the present example.

It is understood that the thickness of the positioning rib 114 in the radial direction of the shaft body 11 may be equal to the sum of the thickness of the flexible screen and the thickness of the adhesive layer.

Therefore, the influence of the thickness of the adhesive layer on the winding of the flexible screen can be avoided, the stress received after the flexible screen is wound is further reduced, and the damage of the stress to the flexible screen is effectively avoided.

Further, enough bonding force can be provided for the flexible screen for ensuring the bonding layer, so that the flexible screen can be straightened by the bonding force, and in the embodiment of the application, the length of the bonding layer wound on the peripheral wall of the shaft body 11 is set to be 35-45 mm; in some specific examples, 40mm may be selected.

Specifically, as illustrated in fig. 2 as a specific example, the adhesive layer may be wound (i.e., rotated in the negative y-axis direction) from the edge of the notch of the avoidance groove 113 or the side wall of the positioning rib 114 in the winding direction (the direction indicated by the arc arrow in fig. 2).

It can be understood that when the flexible screen is completely unfolded and straightened, the inner side wall of the flexible screen is in contact with the vertex of the shaft body 11 in the negative y-axis direction; therefore, the maximum length of the adhesive layer in the winding mode is not more than the vertex position of the shaft body 11 in the negative direction of the y axis, the flexible screen can be completely unfolded, and the display effect is guaranteed.

In a second aspect, referring to fig. 6 to 8, fig. 6 is a schematic overall structure diagram of an electronic device provided in an embodiment of the present application, fig. 7 is a schematic overall structure diagram of another perspective view of the electronic device provided in the embodiment of the present application, and fig. 8 is a top view of fig. 7 taken along line C-C. The embodiment of the present application further provides an electronic device, which includes the winding shaft 10, the flexible screen 20 and the adhesive layer provided in any optional embodiment of the first aspect of the present application;

one end of the flexible panel 20 is fixedly attached to the peripheral wall of the winding shaft 10 through the adhesive layer, and the other end of the flexible panel 20 is operatively wound around the winding shaft 10.

The specific arrangement and position of the adhesive layer may refer to the specific description of the first aspect of the present application, and are not described herein again.

Optionally, the flexible screen 20 comprises: a fixed end 21, a display area 22 and a free end 23.

In particular, the fixed end 21 and the free end 23 may be black-edged areas (i.e., non-display areas) of the flexible screen. It will be appreciated that the length of the black edge of the fixed end 21 and the length of the black edge of the free end 23 may be the same or different.

The fixed end 21 is fixed on the peripheral wall of the winding shaft 10, one end of the display area 22 is connected with the fixed end 21, the other end of the display area 22 is connected with the free end 23, and the free end 23 can be wound on the winding shaft 10 in an operation mode;

when the display area 22 is fully extended, the end of the display area 22 connected to the fixed end 21 is located at the end of the cross-section of the winding shaft 10 facing away from the free end 23 of the diameter parallel to the display area 22.

Specifically, taking fig. 8 as an example for illustration, the end of the display area 22 connected to the fixed end 21 may be the end of the shaft body 11 in the positive direction of the x-axis. In some specific examples, this may be at a vertex position adjacent to the positive x-axis direction. Therefore, the display area 22 of the flexible display screen can extend to the column body of the shaft body 11, so that the display effect of the curved screen is formed, the realistic area is increased, and the impression of a user is improved.

During specific installation, the position where the fixed end 21 (i.e., the black edge) is connected to the display area 22 may be determined, then the flexible screen is completely unfolded and straightened (i.e., the free end 23 is stretched to the zero point sensing position), and after a force is applied to the winding shaft 10, the fixed end 21 is attached to the vertex of the winding shaft 10 along the positive direction of the x axis in the reverse direction (which may be the counterclockwise direction in fig. 8 for example) of the winding direction. The angle α of the fixed point 21 rotating counterclockwise differs depending on the specific length of the black border and the radius of the shaft 11. As a specific example, in the embodiment of the present application, the fixed end 21 is rotated by an angle α of 54.73 °.

Further, the electronic device provided in the second aspect of the embodiment of the present application may further include a moving shaft, the moving shaft being connected to the free end 23, and the display area 22 is unwound from the winding shaft 10 when the moving shaft moves in a direction away from the winding shaft 10; when the moving shaft moves in a direction approaching the winding shaft 10, the display area 22 is wound on the winding shaft 10.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A winding shaft for winding a flexible screen, comprising:

the flexible screen comprises a shaft body (11), wherein a fixing part (111) is arranged on the peripheral wall of the shaft body (11), and the fixing part (111) is used for fixedly connecting one end of the flexible screen;

the peripheral wall of the shaft body (11) is further provided with a transition piece (112), the transition piece (112) protrudes out of the peripheral wall of the shaft body (11) along the radial direction of the shaft body (11), and the transition piece (112) is located at the rear end of the fixing part (111) along the winding direction of the flexible screen; the height of the transition piece (112) protruding from the peripheral wall of the shaft body (11) is gradually increased along the winding direction.

2. A winding shaft according to claim 1, characterized in that the distance between the outer side wall of the transition piece (112) at the rear end in the winding direction and the shaft body (11) is equal to the minimum distance between the outer side wall of the flexible screen and the shaft body (11).

3. A winding shaft according to claim 1, characterized in that the transition piece (112) and the fixing part (111) are located at the diametrically opposite ends of the cross-section of the shaft body (11), respectively.

4. A winding shaft according to claim 1, characterised in that the transition piece (112) is rotated on the peripheral wall of the shaft body (11) in the winding direction by an angle of less than or equal to 180 °.

5. A winding shaft according to claim 1, characterized in that an avoiding groove (113) is provided on the peripheral wall of the shaft body (11), the avoiding groove (113) being located at the rear end of the transition piece (112) in the winding direction; the flexible screen is fixed one end on axis body (11) has integrated circuit chip, dodge groove (113) and be used for holding integrated circuit chip.

6. A winding shaft according to claim 5, characterized in that a positioning rib (114) is further provided on the peripheral wall of the shaft body (11) in the axial direction of the shaft body (11), the positioning rib (114) being located at the rear side of the avoiding groove (113) in the winding direction; the thickness of the positioning rib (114) along the radial direction of the shaft body (11) is the same as the maximum height of the transition piece (112); the positioning rib (114) deviates from the side wall butt joint of the avoiding groove (113) and is arranged on the end face of the flexible screen, so that the flexible screen is positioned in connection with the shaft body (11).

7. A winding shaft according to claim 6, characterized in that the positioning ribs (114) comprise two, and the two positioning ribs (114) are respectively provided at both ends of the shaft body (11) in the axial direction.

8. A winding shaft according to claim 7, characterized in that the positioning rib (114) comprises a first positioning portion (1141) and a second positioning portion (1142), the first positioning portion (1141) extends from the end of the shaft body (11) to the center in the axial direction and abuts against the end face of the flexible screen; the second positioning part (1142) is arranged at the end part of the shaft body (11) and wound on the peripheral wall of the shaft body (11) along the winding direction, and the second positioning part (1142) is used for abutting against the end faces of the flexible screen at two ends along the axial direction of the shaft body (11).

9. A winding shaft according to claim 5, characterized in that said avoiding groove (113) is plural and the number of said avoiding groove (113) is the same as the number of said IC chips.

10. A winding shaft according to claim 1, characterized in that it further comprises two flanges (12), two of said flanges (12) being arranged at each end of said shaft body (11), said flanges (12) protruding outwards from the peripheral wall of said shaft body (11) and protruding from the outer side wall of said transition piece (112); the flexible screen is located between the two flanges (12).

11. An electronic device, comprising: -a winding shaft (10), a flexible screen (20) and an adhesive layer according to any of claims 1 to 10;

one end of the flexible screen (20) is fixedly connected to the peripheral wall of the winding shaft (10) through the bonding layer, and the other end of the flexible screen (20) is configured to be wound on the winding shaft (10).

12. The electronic device of claim 11, wherein the flexible screen (20) comprises: a fixed end (21), a display area (22) and a free end (23);

the fixed end (21) is fixed on the peripheral wall of the winding shaft (10), one end of the display area (22) is connected with the fixed end (21), and the other end of the display area (22) is connected with the free end (23);

when the display area (22) is completely unfolded, the end of the display area (22) connected to the fixed end (21) is located at the end of the cross section of the winding shaft (10) facing away from the free end (23) of the diameter parallel to the display area (22).

13. Electronic device according to claim 12, characterized in that it further comprises a moving shaft connected to the free end (23), the display area (22) being unwound from the winding shaft (10) when the moving shaft is moved in a direction away from the winding shaft (10); when the moving shaft moves toward the winding shaft (10), the display area (22) is wound around the winding shaft (10).