Folding screen middle frame structure and display device

Abstract

The present invention relates to a folding screen middle frame structure and a display device, wherein the folding screen middle frame structure includes a rotating shaft, a first frame body, and a second frame body, wherein the first frame body and the second frame body are respectively arranged on opposite sides of the rotating shaft and are respectively rotatably connected to the rotating shaft; a first rotating shaft surface is formed on the inner side of the first frame body near the edge of the rotating shaft, and the first rotating shaft surface gradually protrudes toward the inner side of the first frame body from the edge to the center; a second rotating shaft surface is formed on the inner side of the second frame body near the edge of the rotating shaft, and the second rotating shaft surface gradually protrudes toward the inner side of the second frame body from the edge to the center. The folding screen middle frame structure changes the rotating shaft surfaces of the two frames from existing flat surfaces to curved surfaces that are smoothly convex from the edge to the center, so that the center of each rotating shaft surface is higher than the edge, thereby structurally improving the gap between the rotating shaft and the frame after assembly and reducing product deformation defects.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a folding screen middle frame structure and a display device. Background Art

[0002] The folding screen includes a middle frame and a screen body. The middle frame includes a rotating shaft and two frames. The two frames are located on both sides of the rotating shaft and are rotatably connected to the rotating shaft so that the middle frame can be folded under the drive of the screen body. However, the existing folding screen has the following problems: the assembly requirements between the left and right frames of the folding screen and the DECO decorative parts are high (the fitting clearance is 0.16mm), and the structure of the left and right frames is weak and easy to deform. If the straightness of the processed rotating shaft exceeds the design requirements (the general design standard is straightness ≤ 0.05mm, and the center convexity cannot exceed 0.05mm), the edges of the frame rotating shaft installation area will be easily deformed to bulge outward after each frame is assembled with the rotating shaft and folded, resulting in a large gap between the rotating shaft and the frame after assembly, affecting the assembly, appearance and easy entry of dust. In addition, the position of the screen installation area away from the rotating shaft installation area is also prone to bulging outward of the frame.

[0003] Currently, the industry lacks a better approach to this problem. Most approaches rely on adjusting processing methods and parameters, adding stress relief, or adding reshaping processes, but these approaches are ineffective and costly. Furthermore, as mobile phones become increasingly thinner and lighter, their structures are relatively weak, leading to increasingly stringent waterproofing requirements. Using reshaping processes can easily result in poor relative height dimensions and poor waterproofing. Summary of the Invention

[0004] Based on this, the present invention provides a folding screen middle frame structure and a display device, which achieves the purpose of improving the gap between the rotating shaft and the frame after assembly by changing the rotating shaft surfaces of the two frames from the existing flat planes to smooth convex surfaces from the edge to the center.

[0005] A folding screen middle frame structure includes a rotating shaft, a first frame body and a second frame body, wherein the first frame body and the second frame body are respectively arranged on opposite sides of the rotating shaft and are respectively rotatably connected to the rotating shaft; a first rotating shaft surface is formed on the inner side of the first frame body near the edge of the rotating shaft, and the first rotating shaft surface gradually protrudes toward the inner side of the first frame body from the edge to the center; a second rotating shaft surface is formed on the inner side of the second frame body near the edge of the rotating shaft, and the second rotating shaft surface gradually protrudes toward the inner side of the second frame body from the edge to the center.

[0006] In one embodiment, the height difference between the edge of the first rotating shaft surface and the center of the first rotating shaft surface is 0.01 to 0.05 mm;

[0007] A height difference between an edge of the second rotation axis surface and a center of the second rotation axis surface is 0.01 to 0.05 mm.

[0008] In one embodiment, the first frame includes a first rotating shaft installation area and a first screen installation area connected to the first rotating shaft installation area, the first rotating shaft installation area is rotatably connected to the rotating shaft, the first screen installation area is located on a side of the first rotating shaft installation area away from the rotating shaft, and the first rotating shaft surface is formed on an inner side of the first rotating shaft installation area near an edge of the rotating shaft;

[0009] The first screen installation area is used to partially install the LCD screen of the folding screen;

[0010] The second frame includes a second rotating shaft installation area and a second screen installation area connected to the second rotating shaft installation area, the second rotating shaft installation area is rotatably connected to the rotating shaft, the second screen installation area is located on a side of the second rotating shaft installation area away from the rotating shaft, and the second rotating shaft surface is formed on an inner side of the second rotating shaft installation area near an edge of the rotating shaft;

[0011] The second screen installation area is used to partially install the LCD screen of the folding screen.

[0012] In one embodiment, a first connecting member is installed inside the first rotating shaft installation area, and the first connecting member is rotatably connected to the rotating shaft.

[0013] In one embodiment, a second connecting member is installed inside the second rotating shaft installation area, and the second connecting member is rotatably connected to the rotating shaft.

[0014] In one embodiment, the first screen installation area includes an edge portion and a correction portion, the correction portion is connected between the edge portion and the first shaft installation area, a correction groove is formed on the inner side of the correction portion, and plastic is injected into the correction groove.

[0015] In one embodiment, the correction groove includes a plurality of correction sub-grooves, and the plurality of correction sub-grooves are formed in a matrix on the correction portion, and plastic is injected into each of the correction sub-grooves.

[0016] In one embodiment, the correction portion is divided into a first correction area and a second correction area by its center;

[0017] Among the plurality of correction sub-grooves, some of the correction sub-grooves are located in the first correction area, and the remaining correction sub-grooves are located in the second correction area;

[0018] The correction sub-grooves in the first correction zone are all injection-molded by a first injection molding channel, and the correction sub-grooves in the second correction zone are all injection-molded by a second injection molding channel.

[0019] In one embodiment, among the plurality of the correction sub-grooves, a groove bottom of the correction sub-grooves closest to the center of the correction portion is formed with a deepened groove;

[0020] The deepened groove is located on a side of the correction sub-groove where it is located close to the center of the correction portion.

[0021] In one embodiment, the second frame includes a second rotating shaft installation area and a second screen installation area connected to the second rotating shaft installation area, the second rotating shaft installation area is rotatably connected to the rotating shaft, the second screen installation area is located on a side of the second rotating shaft installation area away from the rotating shaft, and the second rotating shaft surface is formed on an inner side of the second rotating shaft installation area near an edge of the rotating shaft;

[0022] The second screen installation area is used to partially install the LCD screen of the folding screen.

[0023] The above-mentioned folding screen middle frame structure makes the first rotating axis surface inside the first frame gradually protrude toward the inner side of the first frame from the edge to the center, and makes the second rotating axis surface inside the second frame gradually protrude toward the inner side of the second frame from the edge to the center, so that both rotating axis surfaces are changed from the existing flat surface to a smooth upward convex curved surface from the edge to the center, so that the center of each rotating axis surface is higher than the edge, thereby structurally improving the gap between the rotating axis and the frame after assembly, and reducing product deformation defects.

[0024] The present invention also provides a display device comprising the aforementioned foldable screen midframe structure. This display device replaces the existing flat surfaces of the rotating shafts of the two frame bodies of the foldable screen midframe structure with curved surfaces that smoothly convex from the edge to the center. This allows the center of each rotating shaft surface to be higher than the edge, thereby structurally improving the gap between the rotating shaft and the frame body after assembly and reducing product deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of the folding screen middle frame structure of the present invention;

[0026] Figure 2 for Figure 1 A schematic structural diagram of the first frame in FIG.

[0027] Figure 3 for Figure 2 Schematic diagram of the structure after removing the plastic;

[0028] Figure 4 for Figure 1 Schematic diagram of the structure of the second frame.

[0029] The meanings of the reference numerals in the accompanying drawings are:

[0030] 1-rotating shaft;

[0031] 2 - first frame; 21 - first shaft mounting area; 211 - first shaft surface; 212 - first connector; 22 - first screen mounting area; 221 - edge portion; 222 - correction portion; 2221 - correction groove; 22211 - correction sub-groove; 2222 - plastic; 2223 - deepened groove; 22201 - first correction area; 22202 - second correction area;

[0032] 3-second frame; 31-second shaft installation area; 311-second shaft surface; 312-second connecting member; 32-second screen installation area. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0034] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] like Figures 1 to 4 As shown, it is a folding screen middle frame structure of an embodiment of the present invention, including a rotating shaft 1, a first frame body 2 and a second frame body 3. The first frame body 2 and the second frame body 3 are respectively arranged on opposite sides of the rotating shaft 1 and are respectively rotatably connected to the rotating shaft 1.

[0037] A first rotation axis surface 211 is formed on the inner side of the first frame body 2 near the edge of the rotation axis 1, and the first rotation axis surface 211 gradually protrudes toward the inner side of the first frame body 2 from the edge to the center; a second rotation axis surface 311 is formed on the inner side of the second frame body 3 near the edge of the rotation axis 1, and the second rotation axis surface 311 gradually protrudes toward the inner side of the second frame body 3 from the edge to the center.

[0038] The folding screen middle frame structure of the embodiment of the present invention makes the first rotating shaft surface 211 on the inner side of the first frame body 2 gradually protrude toward the inner side of the first frame body 2 from the edge to the center, and makes the second rotating shaft surface 311 on the inner side of the second frame body 3 gradually protrude toward the inner side of the second frame body 3 from the edge to the center, so that the two rotating shaft surfaces (the first rotating shaft surface 211 and the second rotating shaft surface 311) are changed from the existing flat planes to smooth upward convex curved surfaces from the edge to the center, so that the center of each rotating shaft surface is higher than the edge, thereby structurally improving the gap between the rotating shaft 1 and the frame (the first frame body 2 and the second frame body 3) after assembly, thereby reducing product deformation defects.

[0039] It should be noted that, in this embodiment, when the first frame 2 and the second frame 3 are rotated and connected with the rotating shaft 1, if the first frame 2, the second frame 3 and the rotating shaft 1 are located in the same plane, the folding screen middle frame structure will be in an unfolded state; if the first frame 2, the second frame 3 and the rotating shaft 1 are folded, and the first frame 2 and the second frame 3 are respectively located in two different parallel planes, the folding screen middle frame structure will be in a folded state.

[0040] When the folding screen middle frame structure is in the unfolded state, the inner side of the first frame body 2 and the inner side of the second frame body 3 are located on the same side of the folding screen middle frame structure at this time, and the outer side of the first frame body 2 and the outer side of the second frame body 3 are located on the same side of the folding screen middle frame structure at this time.

[0041] When the folding screen mid-frame structure is in the folded state, the inner side of the first frame body 2 will be the side of the first frame body 2 facing the second frame body 3, and the outer side of the first frame body 2 will be the side of the first frame body 2 facing away from the second frame body 3. The inner side of the second frame body 3 will be the side of the second frame body 3 facing the first frame body 2, and the outer side of the second frame body 3 will be the side of the second frame body 3 facing away from the first frame body 2. In other words, when the folding screen mid-frame structure is in the folded state, the inner side of the first frame body 2 will be opposite to the inner side of the second frame body 3, and the outer side of the first frame body 2 will be opposite to the outer side of the second frame 3.

[0042] In one embodiment, Figures 1 to 4 As shown, the height difference between the edge of the first rotating shaft surface 211 and the center of the first rotating shaft surface 211 is 0.01-0.05 mm.

[0043] A height difference between an edge of the second rotation axis surface 311 and a center of the second rotation axis surface 311 is 0.01-0.05 mm.

[0044] Since the deformation of the two rotating shaft surfaces in the prior art is generally as follows: the maximum inward deformation can be 0.108mm, and the maximum outward deformation can be 0.041mm. By setting the height difference between the edge of the first rotating shaft surface 211 and the center of the first rotating shaft surface 211 to 0.01-0.05mm, and the height difference between the edge of the second rotating shaft surface 311 and the center of the second rotating shaft surface 311 to 0.01-0.05mm, the deformation during assembly is compensated, thereby improving the yield rate of the assembled finished product.

[0045] In one embodiment, Figures 2 to 3 As shown, the first frame 2 includes a first shaft installation area 21 and a first screen installation area 22 connected to the first shaft installation area 21. The first shaft installation area 21 is rotatably connected to the shaft 1 to achieve a rotatable connection between the first frame 2 and the shaft 1.

[0046] Furthermore, the first screen mounting area 22 is located on a side of the first rotating shaft mounting area 21 away from the rotating shaft 1, and a first rotating shaft surface 211 is formed on the inner side of the first rotating shaft mounting area 21 near the edge of the rotating shaft 1. It can be understood that the first rotating shaft surface 211 will be located on the inner side of the first rotating shaft mounting area 21 away from the edge of the first screen mounting area 22.

[0047] The first screen mounting area 22 is used to partially mount the LCD screen of the folding screen. When the folding screen middle frame structure is unfolded or folded, the LCD screen mounted on the first screen mounting area 22 can be manually rotated to drive the first frame 2 to rotate.

[0048] In one embodiment, Figures 2 to 3 As shown, a first connecting member 212 is installed inside the first shaft installation area 21 , and the first connecting member 212 is rotationally connected to the shaft 1 , thereby indirectly realizing the rotational connection between the first frame 2 and the shaft 1 .

[0049] In one embodiment, Figures 2 to 3 As shown, the first screen installation area 22 includes an edge portion 221 and a correction portion 222. The correction portion 222 is connected between the edge portion 221 and the first shaft installation area 21. A correction groove 2221 is formed on the inner side of the correction portion 222. Plastic 2222 is injected into the correction groove 2221.

[0050] By replacing the metal portion of the frame where the foldable screen's LCD screen is mounted (i.e., the first screen mounting area 22) with plastic 2222, the deformation direction of the injection stress is changed, reducing the deformation of the finished product (the foldable screen midframe structure). The correction groove 2221 provides space for the injection of the plastic 2222.

[0051] In one embodiment, Figure 2 and Figure 3 As shown, the correction groove 2221 includes a plurality of correction sub-grooves 22211 , and the plurality of correction sub-grooves 22211 are formed in a matrix on the correction portion 222 , and plastic is injected into each of the correction sub-grooves 22211 .

[0052] By making the correction groove 2221 comprise a plurality of correction sub-grooves 22211 , the deformation direction of the injection stress is changed while ensuring the strength of the first frame 2 , thereby preventing the correction portion 222 of the first frame 2 from being deformed due to being too thin.

[0053] In one embodiment, Figure 2 and Figure 3 As shown, the correction portion 222 is divided into a first correction area 22201 and a second correction area 22202 by its center.

[0054] Among the plurality of correction sub-grooves 22211 , some of the correction sub-grooves 22211 are located in the first correction area 22201 , and the remaining correction sub-grooves 22211 are located in the second correction area 22202 .

[0055] The correction sub-grooves 22211 in the first correction area 22201 are all injection-molded by a first injection molding channel, and the correction sub-grooves 22211 in the second correction area 22202 are all injection-molded by a second injection molding channel.

[0056] By making the correction groove 22211 in the first correction area 22201 and the correction groove 22211 in the second correction area 22202 respectively injected by different injection channels, the single channel injection molding method in the prior art is improved, and the flow mode of the injection mold is changed by correspondingly adjusting the flow channel of the injection mold so that the internal stress of the gripping structure between the change direction of the injection mold flow and the aluminum material of the first frame 2 is optimized and improved.

[0057] In one embodiment, Figure 2 and Figure 3As shown, among the several correction grooves 22211, the groove bottom of the correction groove 22211 closest to the center of the correction portion 222 is formed with a deepened groove 2223. The provision of the deepened groove 2223 increases the thickness of the plastic 2222 closest to the center of the correction portion 222, further reducing the deformation of the middle portion of the finished product (the folding screen midframe structure). The provision of the deepened groove 2223 further provides space for the injection molding of the plastic 2222.

[0058] Preferably, the deepened groove 2223 is located on one side of the correction groove 22211 where it is located, close to the center of the correction part 222, so as to adjust the deformation of the middle part of the edge part 221 of the first frame body 2, so as to reduce the deformation of the middle part of the edge part 221 of the first frame body 2.

[0059] In one embodiment, Figure 4 As shown, the second frame 3 includes a second shaft installation area 31 and a second screen installation area 32 connected to the second shaft installation area 31 , and the second shaft installation area 31 is rotatably connected to the shaft 1 to achieve a rotatable connection between the second frame 3 and the shaft 1 .

[0060] Furthermore, the second screen mounting area 32 is located on a side of the second rotating shaft mounting area 31 away from the rotating shaft 1, and a second rotating shaft surface 311 is formed on the inner side of the second rotating shaft mounting area 31 near the edge of the rotating shaft 1. It can be understood that the second rotating shaft surface 311 will be located on the inner side of the second rotating shaft mounting area 31 away from the edge of the second screen mounting area 32.

[0061] The second screen mounting area 32 is used to partially mount the LCD screen of the folding screen. When the folding screen middle frame structure is unfolded or folded, the LCD screen mounted on the second screen mounting area 32 can be manually rotated to drive the second frame 3 to rotate.

[0062] In one embodiment, Figure 1 As shown, a second connecting member 312 is installed inside the second shaft installation area 31 , and the second connecting member 312 is rotationally connected to the shaft 1 , thereby indirectly realizing the rotational connection between the second frame 3 and the shaft 1 .

[0063] In an embodiment not shown in the figure, the structure of the second screen body installation area 32 may also be consistent with the structure of the first screen body installation area 22, that is, the second screen body installation area 32 may also include an edge portion and a correction portion, and a correction groove is formed on the inner side of the correction portion of the second screen body installation area 32, and plastic is injected into the correction groove of the second screen body installation area 32, thereby changing the deformation direction of the injection stress.

[0064] A display device according to an embodiment of the present invention includes the folding screen midframe structure provided in the above embodiment. This display device changes the rotation axis surfaces (the first rotation axis surface 211 and the second rotation axis surface 311) of the two frames (the first frame 2 and the second frame 3) of the folding screen midframe structure from existing flat surfaces to curved surfaces that are smoothly convex from the edge to the center, thereby making the center of each rotation axis surface higher than the edge. This structurally improves the gap between the rotation axis 1 and the frame after assembly, thereby reducing product deformation defects.

[0065] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A folding screen middle frame structure, characterized by: The first frame and the second frame are respectively arranged on opposite sides of the rotating shaft and are respectively rotatably connected to the rotating shaft; a first rotating shaft surface is formed on the inner side of the first frame near the edge of the rotating shaft, and the first rotating shaft surface gradually protrudes from the edge to the center toward the inner side of the first frame; a second rotating shaft surface is formed on the inner side of the second frame near the edge of the rotating shaft, and the second rotating shaft surface gradually protrudes from the edge to the center toward the inner side of the second frame; The first frame includes a first rotating shaft installation area and a first screen installation area connected to the first rotating shaft installation area, the first rotating shaft installation area is rotatably connected to the rotating shaft, the first screen installation area is located on a side of the first rotating shaft installation area away from the rotating shaft, and the first rotating shaft surface is formed on an inner side of the first rotating shaft installation area near an edge of the rotating shaft; The first screen installation area is used to partially install the LCD screen of the folding screen; The second frame includes a second rotating shaft installation area and a second screen installation area connected to the second rotating shaft installation area, the second rotating shaft installation area is rotatably connected to the rotating shaft, the second screen installation area is located on a side of the second rotating shaft installation area away from the rotating shaft, and the second rotating shaft surface is formed on an inner side of the second rotating shaft installation area near an edge of the rotating shaft; The second screen installation area is used to partially install the LCD screen of the folding screen; The first screen installation area includes an edge portion and a correction portion. The correction portion is connected between the edge portion and the first shaft installation area. A correction groove is formed on the inner side of the correction portion. Plastic is injection-molded in the correction groove.

2. The folding screen middle frame structure according to claim 1, characterized in that: The height difference between the edge of the first rotating shaft surface and the center of the first rotating shaft surface is 0.01 to 0.05 mm; A height difference between an edge of the second rotation axis surface and a center of the second rotation axis surface is 0.01 to 0.05 mm.

3. The folding screen middle frame structure according to claim 1, characterized in that: A first connecting member is installed inside the first rotating shaft installation area, and the first connecting member is rotatably connected to the rotating shaft.

4. The folding screen middle frame structure according to claim 1, characterized in that: A second connecting member is installed inside the second rotating shaft installation area, and the second connecting member is rotatably connected to the rotating shaft.

5. The folding screen middle frame structure according to claim 1, characterized in that: The correction groove includes a plurality of correction sub-grooves, and the plurality of correction sub-grooves are formed in a matrix on the correction part. Plastic is injected into each of the correction sub-grooves.

6. The folding screen middle frame structure according to claim 5, characterized in that: The correction portion is divided into a first correction area and a second correction area by its center; Among the plurality of correction sub-grooves, some of the correction sub-grooves are located in the first correction area, and the remaining correction sub-grooves are located in the second correction area; The correction sub-grooves in the first correction zone are all injection-molded by a first injection molding channel, and the correction sub-grooves in the second correction zone are all injection-molded by a second injection molding channel.

7. The folding screen middle frame structure according to claim 5, characterized in that: Among the plurality of the correction sub-grooves, a groove bottom of the correction sub-grooves closest to the center of the correction portion is formed with a deepened groove; The deepened groove is located on a side of the correction sub-groove where it is located close to the center of the correction portion.

8. A display device, characterized in that: Including the folding screen middle frame structure described in any one of claims 1-7.

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