Foldable screen device

Abstract

Embodiments of the present application provide a foldable screen device, comprising: a foldable middle frame for mounting a flexible screen, the middle frame including: a first middle frame, a second middle frame hingedly connected to the left side of the first middle frame by means of a first hinge, and a third middle frame hingedly connected to the right side of the first middle frame by means of a second hinge, wherein in a folded state, the first middle frame, the second middle frame, and the third middle frame are sequentially stacked in the thickness direction of the foldable screen device; and a magnetic assembly, comprising a first magnetic member and a second magnetic member, wherein the first magnetic member is arranged on the first middle frame and is linked to the third middle frame, the second magnetic member is arranged on the second middle frame, and during an unfolding process of the third middle frame, the two magnetic members switch from an attractive state to a repellent state, and the second middle frame springs outward. In the technical solution of the present application, when the third middle frame is unfolded, the second middle frame can spring at a certain angle relative to the first middle frame; and when the third middle frame is folded, the second middle frame and the first middle frame are attracted to each other, so that a user has better use experience when folding and unfolding the foldable screen device.

Description

Folding screen device

[0001] Cross-reference to related applications

[0002] This application is based on the Chinese Patent Application No. 2024110172366 entitled "Folding screen device" filed on July 26, 2024, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of electronic devices, and in particular to a folding screen device. BACKGROUND

[0004] With the continuous development of electronic technology and display technology, an electronic device with a foldable display screen is increasingly recognized by users. Such a folding screen device not only has a larger display panel, but also can be folded and stored when not in use, thereby facilitating the user's carrying.

[0005] However, the use experience of using such a folding screen device when folding and unfolding is not good, which seriously affects the user's willingness to use.

[0006] SUMMARY

[0007] Aspects of the present application provide a folding screen device, so that the user obtains a better use experience when folding and unfolding the folding screen device.

[0008] In an embodiment of the present application, a folding screen device is provided, which includes a folding middle frame for mounting a flexible screen, the middle frame comprising:

[0009] a first middle frame having a left side and a right side;

[0010] a second middle frame hingedly connected to the left side of the first middle frame by a first hinge;

[0011] a third middle frame hingedly connected to the right side of the first middle frame by a second hinge; when the folding screen device is in a folded state, the first middle frame, the second middle frame and the third middle frame are stacked in sequence along the thickness direction of the folding screen device;

[0012] a magnetic assembly comprising at least one first magnetic member and at least one second magnetic member, the first magnetic member being provided on the first middle frame, the second magnetic member being provided on the second middle frame, the first magnetic member being linked with the third middle frame;

[0013] During the unfolding process of the third middle frame, the first magnetic member and the second magnetic member switch from an attractive state to a repulsive state, and the second middle frame is bounced outward relative to the first middle frame.

[0014] Optionally, one of the first magnetic member and the second magnetic member is a bipolar magnet member, and the other is a monopole magnet member.

[0015] The first middle frame is provided with a sliding groove, and the first magnetic member is located in the sliding groove.

[0016] The first magnetic member can slide with the third middle frame being unfolded, and the first magnetic member and the second magnetic member change from a heteropolar opposite state to a homopolar opposite state.

[0017] Optionally, the linkage assembly is further provided, one end of the linkage assembly is connected with the first magnetic member, and the other end is connected with the second hinge or the third middle frame.

[0018] The third middle frame drives the first magnetic member to slide through the linkage assembly.

[0019] Optionally, the linkage assembly comprises a hinge auxiliary arm and a connecting rod, the hinge auxiliary arm is connected to the second hinge, one end of the connecting rod is connected with the first magnetic member, and the other end of the connecting rod is connected with the hinge auxiliary arm.

[0020] Optionally, the sliding box is further provided, the sliding box is slidably arranged in the sliding groove, the first magnetic member is arranged in the sliding box, and the connecting rod is connected with the sliding box.

[0021] Optionally, the bipolar magnet member comprises two monopole magnet members with opposite magnetic poles, and the two monopole magnet members are arranged in a spaced manner.

[0022] The width of the monopole magnet member on the first middle frame is greater than that of the monopole magnet member on the second middle frame.

[0023] Optionally, along the length direction of the first middle frame, two first magnetic members are arranged in a spaced manner on the first middle frame, one of the first magnetic members is close to the upper edge of the first middle frame, and the other first magnetic member is close to the lower edge of the first middle frame.

[0024] Optionally, the first hinge and the second hinge are both inside folding hinges.

[0025] When the folding screen device is in a folded state, along the thickness direction of the folding screen device, the thickness of the second hinge is greater than that of the first hinge.

[0026] Optionally, the first middle frame, the second middle frame and the third middle frame each have an inner surface and an outer surface.

[0027] The flexible screen is connected to the inner surfaces of the first middle frame, the second middle frame and the third middle frame, respectively.

[0028] When the folding screen device is in the folded state, the inner surface of the first middle frame is fitted with the inner surface of the second middle frame, and the inner surface of the third middle frame is fitted with the outer surface of the second middle frame.

[0029] Optionally, the width of the second middle frame is less than the width of the first middle frame, and the width of the third middle frame is greater than or equal to the width of the first middle frame.

[0030] In the technical solutions provided in the present application, the first middle frame is provided with a first magnetic member, the second middle frame is provided with a second magnetic member, and the first magnetic member can be linked with the third middle frame. When the folding screen device in the folded state is unfolded, the third middle frame drives the first magnetic member to slide, the first magnetic member and the second magnetic member are switched to a state of same-pole opposite repulsion, the magnetic force makes the second middle frame pop open by a certain angle relative to the first middle frame, thereby facilitating the user to further unfold the second middle frame completely; when it is needed to fold the folding screen device, the first magnetic member slides along with the third middle frame being folded, the first magnetic member and the second magnetic member are switched to a state of opposite-pole opposite attraction, and the second middle frame will be attracted to the first middle frame, which is conducive to the folding screen device to stably maintain the folded state, and the user's experience of folding and unfolding the folding screen device is also better. BRIEF DESCRIPTION OF DRAWINGS

[0031] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0032] Fig. 1 is a schematic view of a folding screen device in a folded state according to an embodiment of the present application;

[0033] Fig. 2 is a sectional view of a folding screen device in a folded state according to an embodiment of the present application;

[0034] Fig. 3 is a first schematic view of a folding screen device being unfolded or folded according to an embodiment of the present application;

[0035] Fig. 4 is a second schematic view of a folding screen device being unfolded or folded according to an embodiment of the present application;

[0036] Fig. 5 is a third schematic view of a folding screen device being unfolded or folded according to an embodiment of the present application;

[0037] Fig. 6 is a planar structure schematic view of a folding screen device in an unfolded state according to an embodiment of the present application;

[0038] Fig. 7 is a planar structure schematic view of another folding screen device in an unfolded state according to an embodiment of the present application;

[0039] FIG. 8 is a perspective view of a folding screen device in a folded state according to an embodiment of the present application;

[0040] FIG. 9 is a partial view of FIG. 8;

[0041] FIG. 10 is a perspective view of a folding screen device in an unfolded state according to an embodiment of the present application;

[0042] FIG. 11 is a partial view of FIG. 10;

[0043] FIG. 12 is a partial structural schematic view of a folding screen device according to an embodiment of the present application;

[0044] FIG. 13 is a partial structural cross-sectional view of a folding screen device according to an embodiment of the present application;

[0045] FIG. 14 is a schematic view of another folding screen device in a folded state according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0047] In the present application, the terms “first”, “second”, and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second”, and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of “a plurality of” is two or more. In addition, in the present application, the orientation terms such as “upper”, “lower”, and the like are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0048] In the present application, unless otherwise specified and limited, the term “connection” should be understood broadly, for example, “connection” can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium.

[0049] Fig. 1 is a schematic view of a folding screen device in a folded state according to an embodiment of the present application, Fig. 2 is a sectional view of a folding screen device in a folded state according to an embodiment of the present application, referring to Fig. 1 and Fig. 2, in an embodiment of the present application, a folding screen device is provided, which comprises a first middle frame 1, a second middle frame 2, a third middle frame 3, a first hinge 4, a second hinge 5, a flexible screen 6 and a magnetic assembly 7. The first middle frame 1 has a left side and a right side, the second middle frame 2 is hingedly connected to the left side of the first middle frame 1 through the first hinge 4, and the third middle frame 3 is hingedly connected to the right side of the first middle frame 1 through the second hinge 5. The second middle frame 2 can be unfolded or folded relative to the first middle frame 1, and the third middle frame 3 can also be unfolded or folded relative to the first middle frame 1. When the folding screen device is in an unfolded state, the first middle frame 1, the second middle frame 2 and the third middle frame 3 can be considered to be located on the same plane. When the folding screen device is in a folded state, the first middle frame 1, the second middle frame 2 and the third middle frame 3 are stacked in turn along the thickness direction of the folding screen device (such as the direction of arrow X in Fig. 1). The first middle frame 1 is located at the bottom layer, the second middle frame 2 is located at the middle layer, and the third middle frame 3 is located at the top layer. The folding screen device with three middle frames proposed in the present application can be considered as a three-fold screen electronic device, and the three middle frames are connected through two hinges, so as to realize unfolding or folding of the folding screen device.

[0050] The flexible screen 6 is connected to the first middle frame 1, the second middle frame 2 and the third middle frame 3 respectively; when the three middle frames are completely unfolded, the flexible screen 6 is also unfolded into a flat screen; when the three middle frames are folded, the flexible screen 6 is also folded (as shown in Fig. 2). The magnetic assembly 7 comprises at least one first magnetic member 71 and at least one second magnetic member 72, the first magnetic member 71 is arranged on the first middle frame 1, the second magnetic member 72 is arranged on the second middle frame 2, and the first magnetic member 71 is connected with the third middle frame 3. When the folding screen device is in a folded state, the arrangement position of the first magnetic member 71 on the first middle frame 1 is opposite to the arrangement position of the second magnetic member 72 on the second middle frame 2.

[0051] Referring to FIG. 1, FIG. 1 shows a folding screen device in a folded state, in which the first magnetic member 71 and the second magnetic member 72 are arranged in opposite poles, and the two magnetic members attract each other, and the magnetic attraction force causes the first middle frame 1 and the second middle frame 2 to be attached to each other (as shown in FIG. 1), and the folding state of the second middle frame 2 can be kept more stable. Referring to FIGS. 3 and 4, the third middle frame 3 is unfolded, and the action of the third middle frame 3 drives the first magnetic member 71 to act, and then the first magnetic member 71 and the second magnetic member 72 are switched from the opposite-pole state to the same-pole state. At this time, the first magnetic member 71 and the second magnetic member 72 are switched from the attraction state to the repulsion state, and under the action of the repulsive magnetic force, the second middle frame 2 can be driven to be popped out relative to the first middle frame 1. As shown in FIG. 5, the second middle frame 2 is popped out relative to the first middle frame 1 at a certain angle. It can be understood that, with the change of the magnetic force property of the interaction between the first magnetic member 71 and the second magnetic member 72, the first middle frame 1 and the second middle frame 2 are changed from the state of being attached to each other to the state of being unfolded at an angle, and this angle can make it more convenient for the user to completely unfold the second middle frame 2. The angle of this angle is in the range of [5 degrees to 30 degrees], and specifically 10 degrees.

[0052] In the technical scheme provided in the present application, when the folding screen device in the folded state needs to be unfolded, the third middle frame 3 needs to be unfolded first (as shown in FIG. 3), and with the third middle frame 3 unfolded to a certain angle or completely unfolded (unfolded to 180 degrees), under the action of the magnetic force of the first magnetic member 71 and the second magnetic member 72, the second middle frame 2 in the folded state can be popped out at a certain angle relative to the first middle frame 1 (as shown in FIG. 5), thereby facilitating the user to further completely unfold the second middle frame 2; when the unfolded folding screen device needs to be folded, the second middle frame 2 is first folded to a state of being at a certain angle with the first middle frame 1 (similar to the state of FIG. 5), and then the third middle frame 3 is folded, and with the third middle frame 3 folded to a predetermined position (similar to the state of FIG. 3), the position of the first magnetic member 71 also changes, and the first magnetic member 71 and the second magnetic member 72 are switched to the opposite-pole state, and the first magnetic member 71 and the second magnetic member 72 will attract each other. As shown in FIG. 3, under the action of the magnetic attraction force F1, the second middle frame 2 will be attached to the first middle frame 1, and the second middle frame 2 is in a completely folded state, and the first middle frame 1 and the second middle frame 2 will keep the state of being attracted, thereby facilitating the folding screen device to stably keep the folded state and not to be easily unfolded, and the user's experience of folding and unfolding the folding screen device is better.

[0053] In the technical scheme of the application, the folding screen device includes but is not limited to a folding mobile phone, a folding tablet, a folding notebook computer, a folding display, a folding electronic book, a folding game machine, etc.

[0054] Further, referring to FIG. 6, each of the middle frames can be rectangular with an aspect ratio greater than 1.5, and the hinges are arranged at the long sides of the middle frames. When the flexible screen 6 is unfolded, it is a screen with an aspect ratio of approximately 10.3:9. Referring to FIG. 7, each of the middle frames can also be square with an aspect ratio close to 1, and the hinges are arranged at the long sides or short sides of the middle frames. When the flexible screen 6 is unfolded, it is a screen with an aspect ratio of approximately 16:9.

[0055] It should be noted that the flexible screen 6 is usually connected to the inner surfaces of the first middle frame 1, the second middle frame 2, and the third middle frame 3. The first middle frame 1, the second middle frame 2, and the third middle frame 3 are all hollow structures, and the magnetic assembly 7, the circuit board, the battery assembly, the camera film group, etc. are arranged in the hollow structures of the different middle frame assemblies. The flexible screen is a soft and foldable display screen, which can be an OLED (Organic Light-Emitting Diode) screen, etc.

[0056] In the technical solution of the present application, the outward opening of the second middle frame 2 by a certain angle is associated with the unfolding process of the third middle frame 3. When the third middle frame 3 is unfolded to a predetermined position or a predetermined angle, the first magnetic member 71 and the second magnetic member 72 repel each other, so as to drive the second middle frame 2 to open outward by a certain angle. For example, referring to FIG. 3, when the unfolding angle α of the third middle frame 3 is greater than 60 degrees, or as shown in FIG. 5, when the third middle frame 3 is completely unfolded, the second middle frame 2 is triggered to open outward by a certain angle. This technical solution can effectively avoid the collision between the suddenly opened second middle frame 2 and the third middle frame 3 which is not completely unfolded, and avoid the damage of the flexible screen on the third middle frame 3.

[0057] Further, the first magnetic member 71 and the second magnetic member 72 can be electromagnets or magnets. Taking the first magnetic member 71 as a first electromagnet and the second magnetic member 72 as a second electromagnet as an example. When the folding device needs to be folded, the current directions of the first electromagnet and the second electromagnet are opposite, and the first electromagnet and the second electromagnet attract each other. Of course, when the folding screen device is in the folded state, the first electromagnet and the second electromagnet cannot be powered for a long time, which will significantly shorten the endurance time of the folding screen device. The electromagnet is only powered for a short time when the second middle frame 2 approaches the completely folded state, thereby assisting the second middle frame 2 to be attached to the first middle frame 1. In addition, when the folding screen device in the folded state is unfolded, the third middle frame 3 is first unfolded to a predetermined position or a predetermined angle, which will trigger the change of the current direction of one of the electromagnets. The current directions of the first electromagnet and the second electromagnet are the same, and the first electromagnet and the second electromagnet repel each other, thereby driving the second middle frame 2 to open outward by a certain angle.

[0058] With the first magnetic member 71 and the second magnetic member 72 as magnets as an example, referring to FIG. 1, FIG. 3 to FIG. 6 and FIG. 12, in an embodiment provided by the present application, one of the first magnetic member 71 and the second magnetic member 72 is a bipolar magnet member, and the other is a monopole magnet member. The bipolar magnet member can be understood as a single magnet member with two opposite poles spliced into an integrated structure. It should be noted that the monopole magnet member does not mean that the magnet member has only N or S poles. The monopole magnet member is a magnet block, one pole (N or S) of the magnet block faces the second middle frame 2. It can also be understood that the magnetic field direction inside the monopole magnet block is perpendicular to the first middle frame 1.

[0059] Further, the first middle frame 1 is provided with a sliding groove 8, and the first magnetic member 71 is located in the sliding groove 8. The first magnetic member 71 can slide with the unfolding of the third middle frame 3, and then the first magnetic member 71 and the second magnetic member 72 change from the opposite poles to the same poles. Specifically, referring to FIG. 1 and FIG. 3, the first magnetic member 71 is a monopole magnet member, and the second magnetic member 72 is a bipolar magnet member. In the folded state, the first magnetic member 71 and the second magnetic member 72 are in the opposite poles, which can be understood as the first monopole magnet member 711 and the second monopole magnet member 722 are oppositely arranged, that is, the N pole of one magnet and the S pole of the other magnet are oppositely arranged (see FIG. 8 and FIG. 9), and the first monopole magnet member 711 and the second monopole magnet member 722 attract each other. Referring to FIG. 4 and FIG. 5, when the third middle frame 3 is unfolded to a predetermined position or a predetermined angle, the first magnetic member 71 slides in the direction of the arrow D. The dashed box in FIG. 4 represents the position of the first magnetic member 71 before sliding, and the first magnetic member 71 and the second magnetic member 72 change to the same poles, which can be understood as the first monopole magnet member 711 and the third monopole magnet member 723 are oppositely arranged, that is, the S pole of one magnet and the S pole of the other magnet are oppositely arranged, and the first magnetic member 71 and the second magnetic member 72 repel each other, and under the action of the force F2 (in FIG. 4), the second middle frame 2 will be opened to a certain angle upward.

[0060] Further, the width or area of the monopole magnet member in the first magnetic member 71 is the same as the width or area of one of the monopole magnet members of the second magnetic member 72 (for example, the width or area of the first monopole magnet member 711 and the second monopole magnet member 722 is the same in FIG. 1 and FIG. 3), and the other can also be different (for example, the width or area of the first monopole magnet member 711 and the second monopole magnet member 722 is different in FIG. 9 and FIG. 11).

[0061] In one embodiment, referring to FIGS. 4, 9 and 11, the first magnetic member 71 is a single-pole magnet member, and the second magnetic member 72 is a double-pole magnet member including two single-pole magnet members arranged oppositely with the two single-pole magnet members spaced apart and having a gap therebetween. The single-pole magnet member arranged on the first middle frame 1 has a width greater than that of the single-pole magnet member arranged on the second middle frame 2. For example, in FIGS. 9 and 10, the first single-pole magnet member 711 has a width greater than those of the second single-pole magnet member 722 and the third single-pole magnet member 723. The width of the second single-pole magnet member 722 plus the width of the gap is substantially equal to the width of the first single-pole magnet member 711, and the width of the third single-pole magnet member 723 plus the width of the gap is substantially equal to the width of the first single-pole magnet member 711. This technical solution can make the first magnetic member 71 and the second magnetic member 72 not change abruptly from the state of being attracted to the state of being repelled. With the sliding of the first magnetic member 71, the first magnetic member 71 first changes from the state of being attracted to the state of having no force, and then changes from the state of having no force to the state of being repelled, so that the change of the state of the magnet is more gradual.

[0062] Referring to FIGS. 6, 12 and 13, in one embodiment provided by the present application, the foldable-screen device further includes a linkage assembly, one end of the linkage assembly is connected to the first magnetic member 71, and the other end is connected to the second hinge 5 or the third middle frame 3. When the third middle frame 3 is unfolded, the linkage assembly can drive the first magnetic member 71 to slide through the rotation of the second hinge 5 or the unfolding of the third middle frame 3. When the user unfolds or folds the third middle frame 3, the linkage assembly will move together with the third middle frame 3, so that the first magnetic member 71 and the second magnetic member 72 change the magnetic poles opposite to each other. This technical solution not only has a simple structure, but also can effectively assist the second middle frame 2 to unfold outward or be attracted to the first middle frame 1.

[0063] Further, referring to FIGS. 12 and 13, in one embodiment provided by the present application, the linkage assembly includes a hinge sub-arm 9 and a connecting rod 10. The hinge sub-arm 9 is connected to the second hinge 5, one end of the connecting rod 10 is connected to the first magnetic member 71, and the other end of the connecting rod 10 is connected to the hinge sub-arm 9. Specifically, the hinge sub-arm 9 moves together with the second hinge 5, and when the third middle frame 3 is unfolded, the hinge sub-arm 9 will move synchronously with the rotation of the second hinge 5. One end of the connecting rod 10 is rotatably connected to the first magnetic member 71 through a first pin shaft 101, and the other end of the connecting rod 10 is rotatably connected to the hinge sub-arm 9 through a second pin shaft 102. With the movement of the hinge sub-arm 9, the connecting rod 10 can drive the first magnetic member 71 to slide back and forth.

[0064] To facilitate the installation of the first magnetic member 71, in an embodiment provided by the present application, the folding screen device further comprises a sliding box 11, the sliding box 11 is slidably arranged in the sliding groove 8, the first magnetic member 71 is arranged in the sliding box 11, and the connecting rod 10 is connected with the sliding box 11. The connecting rod 10 drives the sliding box 11 to reciprocate sliding, so as to realize the action of the first magnetic member 71. Referring to FIG. 6, since the second magnetic member 72 on the second middle frame 2 does not move, the second magnetic member 72 can be directly bonded on the second middle frame 2.

[0065] Different from the above embodiment, the sliding of the first magnetic member 71 can be driven by other power sources in addition to being directly driven when the third middle frame 3 is unfolded. For example, in another embodiment provided by the present application, the folding screen device comprises a driving motor, the output end of the driving motor is connected with the first magnetic member 71, and the driving motor can drive the first magnetic member 71 to slide. Specifically, when the third middle frame 3 is unfolded or folded to a predetermined position or a predetermined angle, the driving motor will be triggered, and the output driving force of the driving motor will drive the first magnetic member 71 to slide. When the first magnetic member 71 slides to the target position, the driving motor will stop.

[0066] Referring to FIG. 6, along the length direction of the first middle frame 1 (such as the direction of arrow Y in FIG. 6), two first magnetic members 71 are arranged on the first middle frame 1 at intervals, one of which is close to the upper end of the first middle frame 1, and the other is close to the lower end of the first middle frame 1. This arrangement can make the force between the first middle frame 1 and the second middle frame 2 more balanced. In addition, the number of first magnetic members 71 arranged on the first middle frame 1 can be three, four or more. Increasing the number of first magnetic members can effectively increase the size of the attraction force and the repulsion force between the first middle frame 1 and the second middle frame 2, in addition to which, it can also be achieved by increasing the relative area of the first magnetic member 71 and / or the second magnetic member 72.

[0067] Referring to FIG. 1 and FIG. 2, in an embodiment provided by the present application, the first hinge 4 and the second hinge 5 are both inside folding hinges, which can be understood as the maximum unfolding angle being 180 degrees. When the first hinge 4 is folded, the flexible screen 6 located at the first hinge 4 is folded into a “water drop” shape; when the second hinge 5 is folded, the flexible screen 6 located at the second hinge 5 is folded into a “U” shape. Along the thickness direction of the folding screen device (the direction of arrow X in FIG. 1), the thickness of the second hinge 5 is greater than the thickness of the first hinge 4. The thickness of the first hinge 4 is substantially equal to the total thickness of the first middle frame 1 and the second middle frame 2, and the thickness of the second hinge 5 is substantially equal to the total thickness of the first middle frame 1, the second middle frame 2 and the third middle frame 3.

[0068] Further, compared with the glass screen, the flexible screen 6 is more fragile, so when the folding screen device is folded, the flexible screen 6 needs to be protected. Referring to FIG. 1 and FIG. 2, in an embodiment provided in the present application, the first middle frame 1, the second middle frame 2 and the third middle frame 3 each have an inner surface and an outer surface, and the flexible screen 6 is connected to the inner surfaces of the first middle frame 1, the second middle frame 2 and the third middle frame 3 respectively. When the folding screen device is in the folded state, the inner surface 111 of the first middle frame 1 is in contact with the inner surface 211 of the second middle frame 2, and the inner surface 311 of the third middle frame 3 is in contact with the outer surface 212 of the second middle frame 2. In the technical solution of the present application, when the folding screen device is in the folded state, the flexible screen 6 is located on the inner side of the folding screen device, and the flexible screen 6 is not exposed to the outside, thereby effectively protecting the flexible screen 6 and avoiding accidental scratches.

[0069] Further, the width of the second middle frame 2 is less than the width of the first middle frame 1, and the width of the third middle frame 3 is greater than or equal to the width of the first middle frame 1. Referring to FIG. 1, the width of the second middle frame 2 is less than the width of the first middle frame 1, the end of the second middle frame 2 is spaced apart from the second hinge 5 by a certain distance, the width of the third middle frame 3 is greater than the width of the first middle frame 1, and the end of the third middle frame 3 is spaced apart from the first hinge 4 by a certain distance, which facilitates the user to unfold the third middle frame 3. For example, referring to FIG. 14, the width of the third middle frame 3 is equal to the width of the first middle frame 1, and the end of the third middle frame 3 is substantially flush with the first hinge 4, which is conducive to the folding screen device forming a more regular shape after folding, facilitating storage. Alternatively, the width of the third middle frame 3 can be less than the width of the second middle frame 2 according to the needs of use.

[0070] In summary, in the technical solution provided in the present application, the first middle frame is provided with a first magnetic member, the second middle frame is provided with a second magnetic member, and the first magnetic member is linked with the third middle frame. When the folding screen device is in the folded state, the third middle frame drives the first magnetic member to slide when the third middle frame is unfolded, the first magnetic member and the second magnetic member switch to a state of same-pole opposite repulsion, the magnetic force causes the second middle frame to be popped open by a certain angle relative to the first middle frame, thereby facilitating the user to further unfold the second middle frame completely; when it is needed to fold the folding screen device, the first magnetic member slides along with the third middle frame when the third middle frame is folded inward, the first magnetic member and the second magnetic member switch to a state of opposite-pole opposite attraction, and the second middle frame will be attracted to the first middle frame, which is conducive to the folding screen device to stably maintain the folded state, and the user's experience of folding and unfolding the folding screen device is better.

[0071] The above descriptions are only exemplary embodiments of the present application, and are not intended to limit the present application. Various modifications and changes can be made by those skilled in the art to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A foldable screen device, characterized in that, The application relates to a folding screen device, which comprises a folding middle frame for installing a flexible screen, the middle frame comprising: a first middle frame having a left side and a right side; a second middle frame hinged to the left side of the first middle frame through a first hinge; a third middle frame hinged to the right side of the first middle frame through a second hinge; when the folding screen device is in a folded state, the first middle frame, the second middle frame and the third middle frame are stacked in sequence along the thickness direction of the folding screen device; a magnetic assembly comprising at least one first magnetic piece and at least one second magnetic piece, the first magnetic piece being arranged on the first middle frame, the second magnetic piece being arranged on the second middle frame, and the first magnetic piece being connected with the third middle frame; during the unfolding process of the third middle frame, the first magnetic piece and the second magnetic piece are switched from an attractive state to a repulsive state, and the second middle frame is bounced outwards relative to the first middle frame.

2. The folding screen device according to claim 1, wherein one of the first magnetic piece and the second magnetic piece is a bipolar magnet piece, and the other is a monopolar magnet piece; a sliding groove is arranged on the first middle frame, and the first magnetic piece is located in the sliding groove; the first magnetic piece can slide along with the unfolding of the third middle frame, and the first magnetic piece and the second magnetic piece are switched from a heteropolar state to a homopolar state.

3. The folding screen device according to claim 2, wherein a linkage assembly is further arranged, one end of the linkage assembly being connected with the first magnetic piece, and the other end being connected with the second hinge or the third middle frame; the third middle frame drives the first magnetic piece to slide through the linkage assembly.

4. The folding screen device according to claim 3, wherein the linkage assembly comprises a hinge auxiliary arm and a connecting rod, the hinge auxiliary arm being connected with the second hinge, one end of the connecting rod being connected with the first magnetic piece, and the other end of the connecting rod being connected with the hinge auxiliary arm.

5. The folding screen device of claim 4, wherein, a sliding box is further arranged, the sliding box being slidably arranged in the sliding groove, the first magnetic piece being arranged in the sliding box, and the connecting rod being connected with the sliding box.

6. The folding screen device of claim 2, wherein, the bipolar magnet piece comprises two monopolar magnet pieces arranged oppositely, and the two monopolar magnet pieces are arranged in a spaced mode; the width of the monopolar magnet piece on the first middle frame is greater than that of the monopolar magnet piece on the second middle frame.

7. The folding screen device of claim 2, wherein, two first magnetic pieces are arranged in a spaced mode along the length direction of the first middle frame, one of the first magnetic pieces being close to the upper edge of the first middle frame, and the other being close to the lower edge of the first middle frame.

8. The folding screen device according to any one of claims 1 to 7, characterized in that, the first hinge and the second hinge are both inside-folding hinges; when the folding screen device is in a folded state, the thickness of the second hinge is greater than that of the first hinge along the thickness direction of the folding screen device.

9. The folding screen device of claim 8, wherein, the first middle frame, the second middle frame and the third middle frame each have an inner surface and an outer surface; the flexible screen is connected to the inner surfaces of the first middle frame, the second middle frame and the third middle frame respectively; when the folding screen device is in a folded state, the inner surface of the first middle frame is in contact with the inner surface of the second middle frame, and the inner surface of the third middle frame is in contact with the outer surface of the second middle frame.

10. The folding screen device of claim 9, wherein, the width of the second middle frame is less than that of the first middle frame, and the width of the third middle frame is greater than or equal to that of the first middle frame.

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