Folding structure and display device
By incorporating a sand-proof structure with a containment space within the folded structure, the problem of sand particles entering and affecting the normal operation of the display screen is solved, achieving stable display in sandy environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2024-05-10
- Publication Date
- 2026-05-12
AI Technical Summary
In environments with a lot of sand, existing foldable display products are susceptible to sand particles entering the hinge joint, affecting the normal operation of the display screen. Existing sand-proofing measures have limitations.
A sand-proof structure is incorporated into the folding structure. This structure has a space to hold sand and dust, and is connected to the external space through a storage groove. It absorbs and stores sand and dust, preventing sand and dust from interfering with the normal operation of the hinges and display screen.
It effectively prevents sand and dust from entering the hinges and display screen, ensuring the normal operation of the display device in environments with a lot of sand and reducing the impact of sand on the hinges and screen.
Smart Images
Figure CN118298718B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of display device technology, and more particularly to a folding structure and display device. Background Technology
[0002] Foldable display products, especially foldable phones, are used as portable communication tools in environments with high sand content, such as beaches and deserts. These environments place high demands on the sand resistance of these products. Due to their structural characteristics, foldable displays have more splicing interfaces on the casing, and the gaps between these interfaces are larger than those of candybar displays, making them more susceptible to sand ingress. Even a single grain of sand entering the device can affect the hinge rotation, altering the bending trajectory of the display screen, causing abnormal stress, and ultimately damaging the display function.
[0003] Currently, there are solutions for sand prevention, such as adding brushes near the hinges and controlling the movement trajectory of the hinges to minimize gaps. However, these solutions all have certain limitations. Summary of the Invention
[0004] The purpose of this application is to provide a folding structure and display device that can effectively prevent sand and dust from damaging the screen.
[0005] This application discloses a folding structure, the folding structure comprising:
[0006] A frame having a plurality of receiving slots along a first direction;
[0007] A hinge, at least one of the receiving slots is provided with the hinge;
[0008] A sand-proof structure is provided in at least one of the receiving grooves; the sand-proof structure is provided with a receiving space for accommodating sand and dust, and the receiving space is connected to the space outside the sand-proof structure.
[0009] The first direction is the axial direction of the folding axis of the folding structure.
[0010] Optionally, the accommodating space includes several interconnected cavities, with some cavities near the surface of the sand-proof structure communicating with the space outside the sand-proof structure.
[0011] Optionally, the volume of the receiving cavity is less than or equal to 0.07 mm^3.
[0012] Optionally, the sand-proof structure includes a first sand-proof structure and a second sand-proof structure; the volume of the receiving cavity of the first sand-proof structure is less than or equal to 0.07 mm^3 and greater than or equal to 0.008 mm^3, and the volume of the receiving cavity of the second sand-proof structure is less than or equal to 0.008 mm^3; the receiving cavity of the first sand-proof structure is connected to the receiving cavity of the second sand-proof structure.
[0013] Optionally, the surface of the sand-proof structure has an uneven morphology.
[0014] Optionally, the uneven morphology includes a chamfer located at the edge of the sand-proof structure; the depth of the chamfer does not exceed 1 / 3 of the thickness of the sand-proof structure; the width of the chamfer is greater than or equal to 1 / 5 of the side length of the sand-proof structure and less than or equal to 1 / 2 of the side length of the sand-proof structure.
[0015] Optionally, the uneven morphology includes holes extending from the surface of the sandproof structure into its interior; the depth of the holes does not exceed 1 / 3 of the thickness of the sandproof structure.
[0016] Optionally, the sand-proof structure is formed by sequentially applying two layers of slurry containing cavities of different volumes, followed by a single curing process.
[0017] Optionally, the slurry includes a foaming adhesive composed of polymethyl methacrylate and resin.
[0018] Optionally, the sandproof structure is formed by manufacturing sandproof structure layers containing cavities of different volumes, and then bonding them together.
[0019] Optionally, the receiving groove includes a first receiving groove, a second receiving groove, a third receiving groove, a fourth receiving groove, and a fifth receiving groove; the hinge is provided in the second receiving groove and the fourth receiving groove; the sand-proof structure is provided in the first receiving groove and / or the third receiving groove and / or the fifth receiving groove.
[0020] Optionally, a display module is provided on the side of the frame where the receiving groove is located; the sand-proof structure is connected to the frame on the side closest to the frame.
[0021] Optionally, the sand-proof structure is interference-fitted with the receiving groove, and the interference dimension is greater than or equal to 0.05 mm and less than or equal to 0.5 mm.
[0022] This application also provides a display device, which includes the above-described folding structure.
[0023] Compared with related technologies, this application incorporates a sand-proof structure within the folding structure, which has a space capable of holding sand and dust. When sand and dust enter the folding structure, the sand-proof structure absorbs and stores the sand and dust, preventing it from interfering with the normal operation of the hinges and display screen.
[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description
[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.
[0026] Figure 1 This is a partial structural diagram of the folded structure of this application.
[0027] Figure 2 This is a partial structural schematic diagram of the folded structure of this application from another perspective.
[0028] Figure 3 This is a partial structural schematic diagram of the folded structure of this application from another perspective.
[0029] Figure 4 This is a top view of the folded structure of this application.
[0030] Figure 5 This is a front view schematic diagram of the folded structure of this application.
[0031] Figure 6 This is a side view of the folded structure of this application.
[0032] Figure 7 This is a cross-sectional schematic diagram of the sand-proof structure in one embodiment of this application.
[0033] Figure 8 This is a cross-sectional schematic diagram of the sand-proof structure in another embodiment of this application.
[0034] Figure 9 This is a cross-sectional schematic diagram of the sand-proof structure in another embodiment of this application.
[0035] Figure 10 This is a cross-sectional schematic diagram of the sand-proof structure in another embodiment of this application. Detailed Implementation
[0036] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms “first,” “second,” and similar words used in this specification and the claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar words do not indicate a limitation of quantity, but rather indicate the presence of at least one. The singular forms “a,” “the,” and “the” used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0037] In related technologies, sand prevention is typically achieved by adding brushes near the hinges and controlling the hinge's movement trajectory to minimize gaps. These methods reduce sand entry through structural design. However, there is currently no corresponding solution for the situation where sand particles have entered the entire machine.
[0038] like Figures 1 to 7 As shown, to address the above problems, this application provides a folding structure, which includes:
[0039] The frame 100 has several receiving slots 111 along the first direction F1.
[0040] A hinge (not shown in the figure) is provided in at least one receiving groove 111.
[0041] The sand-proof structure 200 is provided in at least one receiving groove 111. The sand-proof structure 200 is provided with a receiving space 230 for containing sand and dust, and the receiving space 230 is connected to the space outside the sand-proof structure.
[0042] The first direction F1 can be the axial direction of the folding axis of the folding structure. In this application, the first direction F1 is not strictly along the axial direction of the folding axis of the folding structure, that is, the first direction F1 can deviate from the axial direction of the folding axis of the folding structure to a certain extent, for example, the two can deviate by 2°, 4°, 5°, 8°, 10°, etc.
[0043] This application incorporates a sand-proof structure within the folding structure, which has a space to accommodate sand and dust. When sand and dust enter the folding structure, the sand-proof structure absorbs and stores the sand and dust, preventing it from interfering with the normal operation of the hinges and display screen.
[0044] The following will provide a detailed description of various embodiments of this application that conform to the above-described inventive concept.
[0045] like Figures 1 to 7As shown, this application provides a folding structure. The folding structure includes a frame 100, a hinge, a sand-proof structure 200, and a display module (not shown). The display module can be disposed on either side of the frame 100 along the second direction F2. For example, the display module can be disposed on the inner side of the frame 100 after folding, in which case the display device is in an inward folding mode. Alternatively, the display module can be disposed on the outer side of the frame 100 after folding, in which case the display device is in an outward folding mode. Regardless of which side of the frame 100 the display module is disposed on, the display module covers the frame 100, and when the frame 100 is folded, the display module folds along with the frame. The frame 100 includes a middle frame 110 and a ramp 120. The middle frame 110 includes a first frame 130 located at the screen folding axis, a second frame 140 located on opposite sides of the screen folding axis, and a third frame 150. The second frame 140 and the third frame 150 are both disposed on the same side of the first frame 130. The display module is located on the side of the first frame 130 away from the second frame 140 and the third frame 150. Both the second frame 140 and the third frame 150 are cubic plate-like structures. The side of the second frame 140 closest to the third frame 150 and the side of the third frame 150 closest to the second frame 140 can selectively switch between a fitted state and a non-fitted state. Optionally, the second frame 140 and the third frame 150 can be approximately cubic plate-like structures; for example, the surfaces of the second frame 140 and the third frame 150 may have some protrusions and depressions, or their surfaces may have some textures or chamfers, etc. It is only necessary to ensure that when the side of the second frame 140 closest to the third frame 150 and the side of the third frame 150 closest to the second frame 140 are fitted together, there will not be a large gap between them. When the side of the second frame 140 closest to the third frame 150 is attached to the side of the third frame 150 closest to the second frame 140, the folding structure is in an open state. At this time, the second frame 140 and the third frame 150 together form a plate-like structure that shields the back of the folding structure. When the side of the second frame 140 closest to the third frame 150 is not attached to the side of the third frame 150 closest to the second frame 140, the folding structure is in a folded state. When the second frame 140 and the third frame 150 are attached, the projection of the seam between them onto the second direction F2 overlaps with the screen's folding axis. The second direction F2 is the screen's light-emitting direction. In this application, the second direction F2 may not strictly follow the screen's light-emitting direction; that is, the second direction F2 may deviate from the screen's light-emitting direction to a certain extent, for example, by 2°, 4°, 5°, 8°, 10°, etc. In some embodiments, when the folding structure is folded, the display module is folded to the inside, and the second frame 140 and the third frame 150 are located on the outside of the folding structure.In this case, the folding structure of this application is an inward folding structure, and the display module is protected by the frame 100 when folded. In some embodiments, when the folding structure is folded, the second frame 140 and the third frame 150 are folded inward, and the display module is located on the outside of the folding structure. In this case, the folding structure of this application is an outward folding structure, and the display module can still provide the user with the display functions required by the user when folded. For example, the display module can display information such as time, location, or weather.
[0046] The inclined plate 120 includes a first inclined plate 121 and a second inclined plate 122 disposed opposite to each other on both sides of the first frame 130. Both the first inclined plate 121 and the second inclined plate 122 are connected to a hinge structure. The first inclined plate 121 is connected to the second frame 140, and the second inclined plate 122 is connected to the third frame 150. The folding structure can drive the first inclined plate 121 and the second inclined plate 122 through the hinge, thereby driving the second frame 140 and the third frame 150 to move, thus realizing the conversion between the folding structure and the non-folding state. Of course, the frame 100 can also be other structures that can realize the folding function, as long as it can be provided with a receiving slot 111.
[0047] The frame 100 is provided with a plurality of receiving slots 111 along the first direction F1. Specifically, the middle frame 110 is provided with a plurality of receiving slots 111 along the first direction F1. Optionally, the receiving slots 111 can be provided on the side of the middle frame 110 closer to the display module. Optionally, the receiving slots 111 can be provided on the side of the middle frame 110 away from the display module. At least one receiving slot 111 is provided with a hinge structure, and at least one receiving slot 111 is provided with a sandproof structure 200. The sandproof structure 200 is provided with a receiving space 230 for accommodating sand and dust. The receiving space 230 is connected to the external space of the sandproof structure 200. Specifically, the receiving space 230 can be connected to the external space of any side of the sandproof structure 200. For example, when the sandproof structure 200 is cubic in shape, one side of the sandproof structure 200 can be selectively bonded to the receiving slot 111 by adhesive. At this time, the accommodating space 230 can selectively communicate with the external space of at least one of the other five sides of the sand-proof structure 200. Optionally, the accommodating space 230 can selectively communicate with the external space of one, two, three, four, or five of the other five sides of the sand-proof structure 200. In this way, when sand enters the interior of the folded structure, the sand particles can enter the sand-proof structure 200 and be stored in the accommodating space 230 without moving freely within the folded structure, thereby reducing the impact of sand particles on the hinges and screens.
[0048] like Figure 7As shown, in an optional embodiment, the containing space 230 includes a plurality of interconnected containing cavities 231, with some containing cavities 231 near the surface of the sand-proof structure 200 communicating with the space outside the sand-proof structure 200. The plurality of containing cavities 231 can be evenly distributed within the sand-proof structure 200 and interconnected. The fact that the containing cavities 231 near the surface of the sand-proof structure 200 communicate with the space outside the sand-proof structure 200 increases the aperture of the overall communication channel between the containing space 230 and the external space, and reduces the aperture of individual communication channels between the containing space 230 and the external space. The increased aperture of the overall communication channel allows sand particles to enter the containing space 230 more easily, while the reduced aperture of individual communication channels allows the sand particles in the containing space 230 to be better stored in the containing space 230 and not escape. Furthermore, the design of multiple containing cavities 231 can better restrict the movement of sand particles within the containing space 230, preventing sand particles from escaping from the containing space 230. Optionally, the volume of the receiving cavity 231 can be less than or equal to 0.07 mm^3. For example, the volume of the receiving cavity 231 can be 0.07 mm^3, 0.03 mm^3, 0.01 mm^3, 0.008 mm^3, or 0.005 mm^3, etc. Specifically, the receiving cavity 231 can be a spherical cavity with a diameter less than or equal to 0.5 mm. For example, the diameter of the spherical receiving cavity can be 0.5 mm, 0.4 mm, 0.25 mm, 0.2 mm, or 0.15 mm, etc. This type of spherical receiving cavity 231 can better contain and fix sand particles. Of course, the receiving cavity 231 can also be of other shapes, such as an ellipsoid or other irregular shapes. Optionally, the sand-proof structure 200 may include a first sand-proof structure 210 and a second sand-proof structure 220, which are stacked together to form the sand-proof structure 200. The volume of the receiving cavity 231 of the first sand-proof structure 210 is less than or equal to 0.07 mm³ and greater than or equal to 0.008 mm³, for example, the volume of the receiving cavity 231 of the first sand-proof structure 210 can be 0.07 mm³, 0.06 mm³, 0.03 mm³, 0.01 mm³, or 0.008 mm³, etc. The volume of the receiving cavity 231 of the second sand-proof structure 220 is less than or equal to 0.008 mm³, for example, the volume of the receiving cavity 231 of the second sand-proof structure 220 can be 0.008 mm³, 0.006 mm³, 0.003 mm³, 0.001 mm³, or 0.0009 mm³, etc. Specifically, the receiving cavity 231 of the first sand-proof structure 210 can be a spherical cavity with a diameter of less than or equal to 0.5 mm and greater than or equal to 0.25 mm. For example, the diameter of the spherical receiving cavity can be 0.5 mm, 0.4 mm, 0.3 mm, 0.28 mm, or 0.25 mm, etc.The receiving cavity 231 of the second sand-proof structure 220 can also be a spherical cavity with a diameter less than or equal to 0.25 mm. For example, the diameter of the spherical receiving cavity can be 0.25 mm, 0.24 mm, 0.23 mm, 0.2 mm, or 0.15 mm, etc. The receiving cavity 231 of the first sand-proof structure 210 is connected to the receiving cavity 231 of the second sand-proof structure 220. The first sand-proof structure 210 is located on the side of the second sand-proof structure 220 away from the middle frame 110. In this way, the sand-proof structure 200 can use receiving cavities 231 of different levels and volumes to store large-volume sand particles in the first sand-proof structure 210 without affecting the entry of small-volume sand particles into the second sand-proof structure 220, thereby making fuller use of the space within the sand-proof structure 200. Of course, according to actual needs, the sand-proof structure 200 can also have more layers, and the volume of the receiving cavity 231 of each layer can be determined according to actual needs.
[0049] When the sand-proof structure 200 is not layered, that is, when the plurality of accommodating cavities 231 in the sand-proof structure 200 are accommodating cavities 231 of uniform size, the sand-proof structure 200 can be manufactured using open-cell foam or open-cell adhesive, or it can be manufactured using expanding foam. When manufacturing with expanding foam, firstly, ensure that the various components of the expanding foam have been mixed in the correct proportions. For example, the expanding foam can be formulated with polymethyl methacrylate as the main component and a small amount of resin particles as the secondary component. Of course, the components of the expanding foam can be changed according to actual needs and are not limited to a combination of polymethyl methacrylate and resin. Next, prepare the mixing equipment and the necessary tools. Mix the multiple components of the expanding foam together in the correct proportions, which can also be changed according to needs. This can be done by manual mixing or using automatic mixing equipment, ensuring thorough mixing to ensure that the subsequent foaming process can proceed uniformly. Afterward, inject gas into the mixed expanding foam, usually by injecting gas (such as nitrogen or air) into the expanding foam under certain pressure or flow rate. The injection rate and pressure of the gas can be adjusted as needed to control the size and distribution of the pores. Then, the mixing equipment is started to stir the mixed foam. The purpose of stirring is to evenly disperse the injected gas into the foam, ensuring uniform pore formation and controllable pore size. The stirring time and speed can be adjusted as needed. During stirring, the state of the foam needs to be continuously monitored and adjusted as required. Pore formation can be judged by observing bubble formation, detecting the temperature and pressure of the foam, and adjusting parameters such as stirring speed and gas injection rate as needed. Stirring is stopped when the expected pore size and distribution are achieved. Typically, stirring can be stopped when the pores are evenly distributed and the foam exhibits a dense foamy state. Finally, the mixed foam is applied to the surface to be bonded or filled. Before application, ensure that stirring has stopped and the foam is in a suitable state. Through the above steps, the goal of uniformly distributing and controlling pore size can be achieved by stirring liquid foam using existing foaming processes. Throughout the process, it is necessary to strictly control various parameters to ensure that the formation and distribution of pores meet the expected requirements.
[0050] When the sand-proof structure 200 is layered, meaning that the volume of the receiving cavity 231 in each layer of the sand-proof structure 200 is different, the material of the sand-proof structure 200 can be open-cell foam or open-cell adhesive, or expanding foam. When using open-cell foam or open-cell adhesive to manufacture the sand-proof structure 200, different layers of the sand-proof structure are first manufactured sequentially using the open-cell foam or open-cell adhesive, with each layer containing a receiving cavity 231 of a different volume. Then, the different layers of the sand-proof structure are bonded together using an adhesive material. By reserving sufficient bonding positions on the different layers of the sand-proof structure, the bonding of the different layers of the sand-proof structure will not affect the interconnection of the receiving cavities 231 in the different layers of the sand-proof structure. When using expanding foam to fabricate the sandproof structure 200, a sandproof structure layer containing a specific volume cavity 231 can be coated first using the above-described process. Then, another sandproof structure layer containing cavities 231 of different volumes can be coated on top of the first sandproof structure layer, and finally, it can be cured in one step. In this way, the bonding effect between different sandproof structure layers in the sandproof structure 200 is good, and the interconnection of the cavities 231 in different levels of sandproof structure layers is not affected. Of course, the above method can not only be used to manufacture sandproof structures 200 containing two structural layers, but also to manufacture three-layer, four-layer, or other multi-layer sandproof structures 200 according to actual needs. Furthermore, the volume of the cavities 231 in each sandproof structure layer of the sandproof structure 200 can be determined according to actual needs. It can be that the volume of the cavities 231 gradually decreases from the first layer to the last layer, or it can be gradually increased from the first layer to the last layer, or the volume of the cavities 231 can be irregularly determined from the first layer to the last layer, etc.
[0051] like Figures 8 to 10 As shown, in an optional embodiment, the surface of the sand-proof structure 200 has an uneven topography. The uneven topography increases the surface area of the sand-proof structure 200, that is, increases the contact area between the sand-proof structure 200 and the sand particles, allowing the sand-proof structure 200 to better collect sand particles that have entered the folded structure. For example... Figure 8As shown, optionally, the uneven morphology includes a chamfer 240 located at the apex of the sand-control structure 200. The depth of the chamfer 240 generally does not exceed 1 / 3 of the thickness of the sand-control structure 200. For example, the depth of the chamfer 240 can be 1 / 3, 1 / 4, 1 / 5, 1 / 6, or 1 / 7 of the thickness of the sand-control structure 200. The width of the chamfer 240 is generally greater than or equal to 1 / 5 and less than or equal to 1 / 2 of the side length of the sand-control structure 200. For example, the width of the chamfer 240 can be 1 / 5, 1 / 4, 1 / 3, 5 / 12, or 1 / 2 of the side length of the sand-control structure 200. In this way, the chamfer 240 ensures both increased contact area with sand particles and guaranteed overall structural strength. For example, in a cuboid sand-proof structure 200, a chamfer 240 can be provided at at least one of the four corner positions of a certain largest face. For instance, the chamfer 240 can be provided at one, two, three, or all four corner positions of a certain largest face. The depth of the chamfer 240 does not exceed 1 / 3 of its height, the width of the chamfer 240 on its short side does not exceed 1 / 2 of its short side, and the width of the chamfer 240 on its long side does not exceed 1 / 2 of its long side. The chamfer 240 in other shaped sand-proof structures 200 is provided in the same manner as in the cuboid sand-proof structure 200 described above. Figure 9 As shown, optionally, the uneven morphology may include holes 250 extending from the surface of the sand-control structure 200 into its interior. The depth of the holes 250 does not exceed 1 / 3 of the thickness of the sand-control structure 200; for example, the depth of the holes 250 may be 1 / 3, 1 / 4, 1 / 5, 1 / 6, or 1 / 7 of the thickness of the sand-control structure 200. For example, in a cuboid sand-control structure 200, the cuboid may selectively have holes opened into its interior on one of its largest faces. The hole diameter is greater than or equal to 0.5 mm; for example, the hole diameter may be 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, or 0.68 mm. The number of holes 250 can be selected according to actual needs. The hole diameter of the holes 250 may gradually decrease from the surface of the sand-control structure 200 into its interior, thus ensuring both increased contact area with sand particles and guaranteed overall structural strength. Figure 10 As shown, optionally, the uneven morphology of the sand-proof structure 200 can simultaneously include chamfers 240 and holes 250. The size and number of chamfers 240 and holes 250 can be selected according to actual needs, as long as they do not affect the overall structural support strength.
[0052] When the sand-proof structure 200 includes a first sand-proof structure 210 and a second sand-proof structure 220 stacked together, optionally, a chamfer 240 can be provided on the side of the first sand-proof structure 210 away from the second sand-proof structure 220. That is, a chamfer is provided at least one of the four corner positions of the side of the first sand-proof structure 210 away from the second sand-proof structure 220. Optionally, a hole 250 can be provided on the side of the first sand-proof structure 210 away from the second sand-proof structure 220. That is, a hole is drilled from the side of the first sand-proof structure 210 away from the second sand-proof structure 220 toward the direction of approaching the second sand-proof structure 220 to form the hole 250 structure in the above embodiment. Optionally, both the chamfer 240 and the hole 250 structure can be provided on the side of the first sand-proof structure 210 away from the second sand-proof structure 220, wherein the size and number of the chamfer 240 and the hole 250 can be selected according to actual needs.
[0053] like Figure 1 and Figure 2As shown, in an optional embodiment, the frame 100 is sequentially provided with a first receiving groove 112, a second receiving groove 113, a third receiving groove 114, a fourth receiving groove 115, and a fifth receiving groove 116 along the first direction F1. Hinges are provided in the second receiving groove 113 and the fourth receiving groove 115. Sand-proof structures 200 are provided in the first receiving groove 112 and / or the third receiving groove 114 and / or the fifth receiving groove 116. Of course, the frame 100 can also be provided with other numbers of receiving grooves 111 according to actual needs. The arrangement of hinges and sand-proof structures 200 can also be determined according to actual needs. For example, hinges can be provided in the second receiving groove 113 and the third receiving groove 114, and sand-proof structures 200 can be selectively provided in the other receiving grooves 111, or hinges can be provided in the fourth receiving groove 115 and the third receiving groove 114, and sand-proof structures 200 can be selectively provided in the other receiving grooves 111, etc. In this embodiment, specifically, the middle frame 110 is provided with a first receiving groove 112, a second receiving groove 113, a third receiving groove 114, a fourth receiving groove 115, and a fifth receiving groove 116 sequentially along the first direction F1. Optionally, when the sandproof structure 200 is made of a non-adhesive material such as foam, the sandproof structure 200 can be interference-fitted with the receiving groove 111, and the external dimensions of the sandproof structure 200 are slightly larger than the size of the receiving groove 111, so that the space of the receiving groove 111 can be fully utilized. The interference dimension of the interference fit is greater than or equal to 0.05 mm and less than or equal to 0.5 mm. For example, the interference dimension of the interference fit can be 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, or 0.5 mm, etc. When the sand-proof structure 200 is made of a non-adhesive material such as foam, the sand-proof structure 200 and the receiving groove 111 can also be connected by adhesive. A layer of adhesive can be applied to the bottom of the receiving groove 111, and then the non-absorbent surface of the sand-proof structure 200 can be directly adhered to the bottom of the receiving groove 111. When the sand-proof structure 200 is made of an adhesive material such as expanding foam, due to its inherent adhesiveness, the non-absorbent surface of the sand-proof structure 200 can be directly adhered to the bottom of the receiving groove 111. For example, when the sand-proof structure 200 is not layered and does not have any unevenness, any side of the sand-proof structure 200 can be a non-absorbent surface. When the sand-proof structure 200 has unevenness, the side of the sand-proof structure 200 without unevenness can be used as a non-absorbent surface. Optionally, the side of the sand-proof structure 200 away from the unevenness can be used as a non-absorbent surface. When the sand-proof structure 200 is layered, for example, when the volume of the cavity 231 gradually increases from the first layer to the last layer, the side of the first layer facing away from the last layer can be used as the non-sand-absorbing surface.
[0054] This application also provides a display device including the above-described folding structure, which can be an electronic device such as a foldable screen mobile phone, a foldable screen watch, an in-vehicle foldable display screen, and a foldable tablet.
Claims
1. A folding structure, characterized in that, The folding structure includes: A frame having a plurality of receiving slots along a first direction; A hinge, at least one of the receiving slots is provided with the hinge; A sand-proof structure is provided in at least one of the receiving grooves; the sand-proof structure is provided with a receiving space for accommodating sand and dust, and the receiving space is connected to the space outside the sand-proof structure; the receiving space includes multiple receiving cavities, which are evenly distributed within the sand-proof structure and are interconnected; some of the receiving cavities near the surface of the sand-proof structure are connected to the space outside the sand-proof structure. The sand-proof structure includes a first sand-proof structure and a second sand-proof structure, which are stacked together to form the sand-proof structure; the volume of the receiving cavity of the second sand-proof structure is less than or equal to the volume of the receiving cavity of the first sand-proof structure; the receiving cavity of the first sand-proof structure is connected to the receiving cavity of the second sand-proof structure. The first direction is the axial direction of the folding axis of the folding structure.
2. The folding structure according to claim 1, characterized in that, The volume of the receiving cavity is less than or equal to 0.07 mm^3.
3. The folding structure according to claim 2, characterized in that, The volume of the receiving cavity of the first sandproof structure is less than or equal to 0.07 mm^3 and greater than or equal to 0.008 mm^3, and the volume of the receiving cavity of the second sandproof structure is less than or equal to 0.008 mm^3.
4. The folding structure according to claim 1, characterized in that, The surface of the sand-proof structure has an uneven morphology.
5. The folding structure according to claim 4, characterized in that, The uneven morphology includes a chamfer located at the edge of the sand-proof structure; the depth of the chamfer does not exceed 1 / 3 of the thickness of the sand-proof structure; the width of the chamfer is greater than or equal to 1 / 5 of the side length of the sand-proof structure and less than or equal to 1 / 2 of the side length of the sand-proof structure.
6. The folding structure according to claim 4, characterized in that, The uneven morphology includes holes extending from the surface of the sand-proof structure into its interior; the depth of the holes does not exceed 1 / 3 of the thickness of the sand-proof structure.
7. The folding structure according to claim 3, characterized in that, The sand-proof structure is formed by sequentially applying two layers of slurry containing cavities of different volumes, followed by a single curing process.
8. The folding structure according to claim 7, characterized in that, The slurry includes a foaming adhesive composed of polymethyl methacrylate and resin.
9. The folding structure according to claim 3, characterized in that, The sand-proof structure is formed by manufacturing sand-proof structure layers containing cavities of different volumes, and then bonding them together.
10. The folding structure according to claim 1, characterized in that, The receiving groove includes a first receiving groove, a second receiving groove, a third receiving groove, a fourth receiving groove, and a fifth receiving groove; the hinge is provided in the second receiving groove and the fourth receiving groove; the sand-proof structure is provided in the first receiving groove and / or the third receiving groove and / or the fifth receiving groove.
11. The folding structure according to claim 10, characterized in that, A display module is provided on one side of the frame where the receiving groove is located; the sand-proof structure is connected to the frame on the side closest to the frame.
12. The folding structure according to claim 1, characterized in that, The sand-proof structure is interference-fitted with the receiving groove, and the interference dimension is greater than or equal to 0.05 mm and less than or equal to 0.5 mm.
13. A display device, characterized in that, The display device includes a folding structure as described in any one of claims 1-11.