Display equipment and threaded connecting piece

Abstract

The embodiment of the utility model provides display equipment and a threaded connecting piece, relates to the technical field of electronic equipment, and aims to solve the problem that the threaded connecting piece is easy to deform and even break. The display device comprises a middle frame, a rotating shaft limiting block and a threaded connecting piece. The threaded connecting piece is fixedly connected with the middle frame and the rotating shaft limiting block. The threaded connecting piece comprises a head part, a screw rod and a connecting part. The connecting part connects the head and the screw. The head part is provided with a groove which extends into the connecting part. The radial size of the first connecting position of the connecting part and the head is larger than the radial size of the second connecting position of the connecting part and the screw. The outer wall surface of the connecting part comprises a first wall surface and a second wall surface, and the first wall surface and the second wall surface are inclined surfaces. The first wall surface is closer to the screw than the second wall surface. The joint of the first wall face and the second wall face protrudes in the direction away from the groove. According to the display equipment, the reliability of the threaded connecting piece can be improved, and the situation that the threaded connecting piece is prone to deformation and even breakage is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a display device and a threaded connector. Background Art

[0002] In order to meet users' portability needs, the lightweight and thinning of display devices is one of the current development trends, especially foldable display devices have a stronger demand for lightweight and thinness.

[0003] To meet the requirements of thinner and lighter display devices, the size of threaded connectors within display devices has also been reduced due to the limited space within the entire device. However, when subjected to impact, threaded connectors are prone to deformation or even breakage, failing to meet the strength and reliability requirements of the entire device. Utility Model Content

[0004] The purpose of the present application is to provide a display device and a threaded connector, which are used to improve the reliability of the threaded connector and improve the situation where the threaded connector is easily deformed or even broken.

[0005] In the first aspect of the present application, a display device is provided, comprising: a middle frame, a shaft limit block and a threaded connector. The shaft limit block can provide support and limiting effects on the shaft of the display device. The threaded connector can be a screw, a bolt, etc. The threaded connector fixedly connects the middle frame and the shaft limit block. A through hole is provided on the shaft limit block. The threaded connector comprises a head, a screw and a connecting portion. The connecting portion connects the head and the screw. The head has a groove, and the groove extends into the connecting portion. The groove can be fitted with a tool (such as a screwdriver, etc.) for screwing in and out of the threaded connector. The radial dimension of the first connection between the connecting portion and the head is greater than the radial dimension of the second connection between the connecting portion and the screw. The thickness between the outer wall of the connecting portion close to the head and the inner wall of the groove (including the side wall and bottom surface of the groove) is increased to improve the strength of the portion between the outer wall of the connecting portion and the inner wall of the groove.

[0006] To make display devices thinner and lighter, the space between the hinge stop and the midframe is limited, necessitating a thinner design for the head of the threaded connector. To ensure the threaded connector can accommodate tools used to screw it in and out (such as a screwdriver), the groove cannot be too small, requiring it to extend into the connector. The thin section between the outer wall of the connector and the inner wall of the groove can easily deform or even break when subjected to impact.

[0007] In the display device provided by the present application, the outer wall surface of the connection part includes a first wall surface and a second wall surface, and the first wall surface and the second wall surface are both inclined surfaces. The first wall surface is closer to the screw rod than the second wall surface, and at least a portion of the first wall surface is located in the through hole. The connection between the first wall surface and the second wall surface protrudes in the direction away from the groove. By thickening the thickness between the first wall surface and the second wall surface and the inner wall of the groove respectively, the strength of the part between the outer peripheral side of the threaded connector and the groove is improved. The risk of partial fracture between the outer peripheral side of the threaded connector and the groove is reduced, and the situation in which the threaded connector is easily deformed or even fractured when it is impacted during the use of the display device is improved. When the size of the first connection is constant, the first wall surface and the second wall surface are both inclined surfaces, so as to avoid tolerances caused by processing, which causes the connection part to be stuck outside the through hole and unable to extend into the through hole.

[0008] In an optional embodiment, the opening of the angle α between the first wall and the second wall faces the groove, and 120°≤α≤150°. The angle α between the first wall and the second wall is greater than or equal to 120°, so that the transition between the first wall and the second wall is slow, avoiding stress concentration at the connection between the first wall and the second wall due to too small an angle, which may cause damage to the connection between the first wall and the second wall. The angle α between the first wall and the second wall is less than or equal to 150°, ensuring that the connection between the first wall and the second wall protrudes significantly away from the groove, so as to ensure that the thickness between the first wall and the second wall and the inner wall of the groove can meet the strength requirements of the threaded connection.

[0009] In an optional embodiment, the thickness between the second wall surface and the inner wall of the groove is 0.4 to 0.8 times the depth of the groove. The thickness between the second wall surface and the inner wall of the groove is greater than or equal to 0.4 times the depth of the groove to ensure that the thickness between the second wall surface and the inner wall of the groove is large, to ensure the strength of this part, and to reduce the risk of partial fracture between the second wall surface and the groove. The thickness between the second wall surface and the inner wall of the groove is less than or equal to 0.8 times the depth of the groove. Under the condition of certain specifications of the threaded connector, the depth of the groove is ensured to cooperate with the tool (such as a screwdriver, etc.) used to screw in and out the threaded connector, and to ensure that after the tool is inserted into the groove, it can drive the threaded connector to be screwed in and out.

[0010] In an optional embodiment, the thickness between the second wall surface and the inner wall of the groove is greater than or equal to 0.18 times the diameter of the screw. The thickness between the second wall surface and the inner wall of the groove is greater than or equal to 0.18 times the diameter of the screw to ensure a larger thickness between the second wall surface and the inner wall of the groove, thereby ensuring the strength of this portion and reducing the risk of fracture of the portion between the second wall surface and the groove.

[0011] In an optional embodiment, the thickness between the first wall surface and the inner wall of the groove is greater than or equal to 0.23 mm. After the threaded connector securely connects the middle frame and the shaft limit block, the thickness between the first wall surface and the inner wall of the groove is ensured to be relatively large, thereby ensuring the strength of this portion and reducing the risk of partial fracture between the first wall surface and the groove. The thickness between the second wall surface and the inner wall of the groove is greater than or equal to 0.23 mm. This ensures the thickness between the second wall surface and the inner wall of the groove is relatively large, thereby ensuring the strength of this portion and reducing the risk of partial fracture between the second wall surface and the groove.

[0012] In an optional embodiment, the opening of the angle β between the surface of the head facing the screw and the second wall faces away from the groove. Wherein, 90°<β≤120°. The angle β between the surface of the head facing the screw and the second wall is greater than 90°, so as to avoid stress concentration caused by too small an angle β at the connection between the second wall and the head, thereby reducing the risk of fracture at the connection between the second wall and the head. The angle β between the surface of the head facing the screw and the second wall is less than or equal to 120°, so as to avoid excessive inclination of the second wall due to too large an angle β at the connection between the second wall and the head, thereby reducing the thickness between the portion of the second wall facing the first wall and the inner wall of the groove, thereby reducing the risk of partial fracture between the second wall and the groove.

[0013] In an optional embodiment, the thickness of the head along the axis of the screw is less than or equal to 0.22 mm. The smaller the thickness of the head, the smaller the space required for the connection between the shaft stopper and the middle frame, thereby achieving a thinner and lighter display device.

[0014] In one optional embodiment, the groove has a depth of less than or equal to 0.35 mm. The smaller the groove depth, the less the groove extends toward the connection portion. Since both the first and second walls are inclined, the thickness between the first or second wall and the inner wall of the groove increases as the groove extends less toward the connection portion. This, in turn, reduces the risk of partial fracture between the outer periphery of the threaded connector and the groove by strengthening the connection portion.

[0015] In one optional embodiment, the distance between the end of the groove facing the screw and the open end of the groove along the screw axis is less than or equal to 0.25 mm. This allows the groove sidewall to extend less toward the screw side, i.e., the thickness between the groove sidewall and the second wall surface is greater, thereby reducing the risk of partial fracture between the outer periphery of the threaded connector and the groove by strengthening the connection.

[0016] In one optional embodiment, the middle frame is provided with a threaded hole, and the screw is threadedly connected to the threaded hole. The head of the screw is located on the side of the through-hole facing away from the threaded hole and abuts the shaft stop. A threaded connector passes through the through-hole of the shaft stop and is threadedly connected to the middle frame, thereby securing the shaft stop and the middle frame. The threaded hole has a third wall facing the inner wall of the through-hole, and the third wall is inclined in a direction away from the axis of the screw along the direction of the screw head. The connecting portion is located within the space enclosed by the inner wall of the through-hole and the third wall. When the dimensions of the threaded hole are fixed, the third wall is inclined in a direction away from the axis of the screw, thereby increasing the space enclosed by the inner wall of the through-hole and the third wall, thereby accommodating the portion of the first wall and the second wall that protrudes away from the groove at the junction. While increasing the thickness of the first wall and the second wall relative to the inner wall of the groove, both the first wall and the second wall can be accommodated within the space enclosed by the inner wall of the through-hole and the third wall.

[0017] In an optional embodiment, the angle between the surface of the middle frame facing the head and the third wall is γ. Wherein, 135°<γ≤170°. When the angle γ between the surface of the middle frame facing the head and the third wall is greater than 135°, the height dimension occupied by the third wall (i.e., the dimension along the circumference of the screw) can be smaller while the size of the opening of the threaded hole facing the head and the height of the threaded part remain unchanged, and the total depth of the threaded hole remains unchanged, thereby leaving a size for the threaded part of the threaded hole. When the display device is made thinner and lighter, the size of the middle frame is smaller, so that the depth of the threaded hole opened on the middle frame also needs to be designed to be smaller, the height dimension occupied by the third wall is reduced to ensure that the threaded part of the threaded hole is connected to the threaded connector.

[0018] In an optional embodiment, the diameter of the screw is less than or equal to 1.2 mm. With a smaller screw diameter, the through hole and threaded hole can also be smaller, and the required size of the connection between the middle frame and the shaft limit block is smaller, thereby facilitating the miniaturization and thinness of the display device.

[0019] In an optional embodiment, the display device further includes a mainboard, and a threaded connector is also provided at the connection between the mainboard and the middle frame. Similar to the threaded connector provided at the connection between the hinge stop and the middle frame, this reduces the size of the mainboard and middle frame while also improving the ability of the threaded connector to deform or even break when subjected to impact during use of the display device.

[0020] According to a second aspect of the present application, a threaded connector is provided, comprising: a head, a screw and a connecting portion. The connecting portion connects the head and the screw. The head has a groove, and the groove extends into the connecting portion. The radial dimension of the first connection between the connecting portion and the head is greater than the radial dimension of the second connection between the connecting portion and the screw. The outer wall surface of the connecting portion includes a first wall surface and a second wall surface. The first wall surface and the second wall surface are both inclined surfaces. The first wall surface is closer to the screw than the second wall surface. The connection between the first wall surface and the second wall surface protrudes in a direction away from the groove. The above-mentioned threaded connector has the same technical effect as the aforementioned display device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a display device provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 A schematic structural diagram of the display device shown is in a folded state;

[0023] Figure 3 for Figure 1 The display device shown is at the dotted box A, a top view with the display module removed;

[0024] Figure 4 for Figure 1 A schematic diagram of a partial structure of the display device shown in the unfolded state;

[0025] Figure 5 for Figure 3 A cross-sectional view of the display device along line P1-P2 is shown;

[0026] Figure 6 for Figure 2 The display device shown is a top view with the display screen removed;

[0027] Figure 7 for Figure 6 A cross-sectional view of the display device along line O1-O2 is shown;

[0028] Figure 8 A cross-sectional view of a threaded connector provided in an embodiment of the present application;

[0029] Figure 9 for Figure 8 An enlarged view of the threaded connection shown at B;

[0030] Figure 10 for Figure 5 An enlarged view of the display device at point C is shown.

[0031] Reference numerals:

[0032] 100-display device; 01-display module; 11-display screen; 02-housing assembly; 21-middle frame; 211-threaded hole; 212-third wall; 22-back cover; 23-rotating shaft mechanism; 03-rotating shaft limit block; 31-through hole; 04-threaded connector; 41-head; 42-screw; 43-connecting part; 431-first wall; 432-second wall; 44-groove. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0034] In the following, the terms "first," "second," "third," "fourth," etc., are used for descriptive convenience only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature identified with "first," "second," "third," "fourth," etc., may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0035] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed mechanical connection, a detachable mechanical connection, or an integrated connection; or, "connection" can be a direct connection or an indirect connection through an intermediate medium.

[0036] In the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" and "for example" is intended to present the relevant concepts in a concrete manner.

[0037] In the drawings of the embodiments of the present application, components are represented by straight line guide lines with arrows; parts are represented by straight line guide lines only; hollow structures such as cavities and openings and surfaces are represented by curved line guide lines.

[0038] Embodiments of the present application provide a display device 100. The display device 100 can be a mobile phone, tablet personal computer, personal digital assistant (PDA), watch, e-reader, laptop computer, wearable device, or other display device with a foldable function. For ease of description, the following embodiments use a foldable mobile phone as an example.

[0039] See also Figure 1 The display device 100 may include a display module 01 and a housing assembly 02. The display module 01 may include a display screen 11. The display screen 11 is disposed on one side of the housing assembly 02 and is connected to the housing assembly 02. The housing assembly 02 may also protect and support the display device 100.

[0040] The display screen 11 is used to display information such as images and videos. The above-mentioned display screen 11 can be a flexible display screen 11. The flexible display screen 11 has the characteristics of strong flexibility and bendability, and can provide users with a new interactive method based on its bendable characteristics. The display panel of the display screen 11 can adopt any one of a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc., and the embodiments of the present application are not limited to this. The display screen 11 has a display surface for displaying image information, and the display surface of the display screen 11 is exposed to facilitate the presentation of images, videos and other information to the user.

[0041] In the following, an example is given in which the display device 100 is a foldable display device 100 .

[0042] In order to facilitate the description of the following embodiments, Figure 1 The display device 100 is shown in an unfolded state, and an XYZ coordinate system is established, defining the length direction of the display device 100 as the X-axis direction, the width direction of the display device 100 as the Y-axis direction, and the thickness direction of the display device 100 as the Z-axis direction. It will be understood that the coordinate system setting of the display device 100 can be flexibly set according to actual needs and is not specifically limited here.

[0043] Continue reading Figure 1 The housing assembly 02 may include at least two middle frames 21. Each middle frame 21 is used to support the display screen 11. The two middle frames 21 can rotate relative to each other to move closer to or away from each other, thereby switching the display device 100 between the unfolded state and the folded state.

[0044] See also Figure 2 The display device 100 may further include a back cover 22. Figure 1 The unfolded state is bent inwardly to Figure 2 In the folded state shown, the back cover 22 is exposed. Figure 1 When the expanded state is described, please refer to Figure 3 , Figure 3 for Figure 1 The display device shown is at the dotted frame A, a top view after the display module 01 is removed, and at least a portion of the back cover 22 is located in the middle frame 21.

[0045] In order to achieve Figure 1 The two middle frames 21 rotate relative to each other, so that the display device 100 switches between the folded state and the unfolded state. Figure 3 The housing assembly 02 may further include a shaft mechanism 23 (the portion shown in the figure may be a portion of the shaft mechanism 23 , and the other portions of the shaft mechanism 23 are not shown). The shaft mechanism is disposed between the two middle frames 21 , and the two middle frames 21 are connected to the shaft mechanism 23 respectively.

[0046] See also Figure 4 , Figure 4 This is a partial structural diagram of the display device 100 in the unfolded state. The display device 100 may also include a hinge stopper 03. When the display device 100 is in the bent state, a portion of the hinge mechanism 23 rotates to the position indicated by the dashed box in the figure. The hinge stopper 03 is used to limit and support the hinge mechanism 23.

[0047] To ensure that the shaft limit block 03 is fixed in the middle frame 21, please refer to Figure 5 , Figure 5 for Figure 3 The display device 100 shown in the cross-sectional view along P1-P2 may further include a threaded connector 04. A through hole 31 is defined in the rotation shaft stop 03. The threaded connector 04 passes through the through hole 31 and securely connects the middle frame 21 to the rotation shaft stop 03. The threaded connector 04 may be a threaded connector such as a screw or bolt. This is not specifically limited in the present embodiment.

[0048] See also Figure 6 , Figure 6 for Figure 2 The bottom view of the display device 100 after removing the display screen 11 is shown, showing the display module 01 (such as Figure 1 The display screen 11 may include a support member 12. The support member 12 is located on a side of the display screen 11 that is away from the display surface. The support member 12 can support the display screen 11.

[0049] See also Figure 7 , Figure 7 for Figure 6In the cross-sectional view of the display device 100 along line O1-O2, when the display device 100 is in the folded state, the support member 12 is bent toward the side where the middle frame 21 is located. A portion of the support member 12 is located in the space on one side of the threaded connector 04.

[0050] The above description uses the example of threaded connector 04 disposed at the connection between the middle frame 21 and the shaft stop block 03. In other embodiments of the present application, threaded connector 04 may also be disposed between other components that require connection. For example, threaded connector 04 may also be disposed at the connection between the motherboard (not shown) and the middle frame 21. Similar to threaded connector 04 disposed at the connection between the shaft stop block 03 and the middle frame 21, this reduces the size of the motherboard and middle frame 21 while also improving the ability of threaded connector 04 to deform or even break when subjected to impact during use of the display device.

[0051] See also Figure 8 The threaded connector 04 may include a head 41, a screw 42 and a connecting portion 43. The connecting portion 43 connects the head 41 and the screw 42. The head 41 has a groove 44, and the groove 44 extends into the connecting portion 43. The groove 44 can cooperate with a tool (such as a screwdriver, etc., not shown in the figure) used to screw in and out the threaded connector 04. The radial dimension d1 of the first connection a between the connecting portion 43 and the head 41 is greater than the radial dimension d2 of the second connection b between the connecting portion 43 and the screw 42. The thickness between the outer wall of the portion of the connecting portion 43 close to the head 41 and the inner wall of the groove 44 (including the side wall and bottom surface of the groove 44) is increased to improve the strength of the portion between the outer wall of the connecting portion 43 and the inner wall of the groove 44.

[0052] To leave sufficient space for the back cover 22 or support member 12 and achieve a thinner and lighter display device, the thickness t of the head 41 of the threaded connector 04 needs to be designed to be relatively thin. Furthermore, to ensure that the threaded connector 04 can be compatible with tools (such as a screwdriver) used to screw it in and out, the size of the groove 44 cannot be too small, so the groove 44 needs to extend into the connecting portion 43. The portion between the outer wall of the connecting portion 43 and the inner wall of the groove 44 is relatively thin, and this portion is prone to deformation or even fracture when subjected to impact.

[0053] To solve the above problem, please refer to Figure 9 , Figure 9 for Figure 8 As shown in the enlarged view of the threaded connector 04 at B, the outer wall surface of the connecting portion 43 may include a first wall surface 431 and a second wall surface 432. The first wall surface 431 and the second wall surface 432 are both inclined surfaces. The first wall surface 431 is closer to the screw 42 than the second wall surface 432. At least a portion of the first wall surface 431 is located in the through hole 31 (as shown in FIG. Figure 5As shown). The connection between the first wall 431 and the second wall 432 protrudes in the direction M away from the groove 44. By thickening the thickness w1 between the first wall 431 and the inner wall of the groove 44, and the thickness w2 between the second wall 432 and the inner wall of the groove 44, the strength of the portion between the outer peripheral side of the threaded connector 04 and the groove 44 is improved. The risk of partial breakage between the outer peripheral side of the threaded connector 04 and the groove 44 is reduced, and the situation in which the threaded connector 04 is easily deformed or even broken when it is impacted during the use of the display device is improved. When the size of the first connection a is constant, the first wall 431 and the second wall 432 are both inclined surfaces, so as to avoid tolerances caused by processing, which causes the connection part 43 to be stuck outside the through hole 31 and unable to extend into the through hole 31.

[0054] Continue reading Figure 9 The opening of the first wall 431 and the second wall 432 at an angle α is oriented toward the groove 44, and 120°≤α≤150°. For example, the angle α between the first wall 431 and the second wall 432 is 120°, 125°, 130°, 135°, 140°, 145°, 150°, etc.

[0055] The included angle α between the first wall 431 and the second wall 432 is greater than or equal to 120°, which allows for a gentle transition between the first wall 431 and the second wall 432. This avoids stress concentration at the connection between the first wall 431 and the second wall 432 due to an excessively small angle, which could cause damage thereto. The included angle α between the first wall 431 and the second wall 432 is less than or equal to 150°, ensuring that the connection between the first wall 431 and the second wall 432 protrudes significantly away from the groove 44, thereby ensuring that the thickness between the first wall 431 and the second wall 432 and the inner wall of the groove 44 meets the strength requirements of the threaded connector 04.

[0056] Continue reading Figure 9 The thickness w2 between the second wall 432 and the inner wall of the groove 44 is the depth h1 of the groove 44 (e.g. Figure 84 times to 0.8 times of the depth h1 of the groove 44). Exemplarily, the thickness w2 between the second wall 432 and the inner wall of the groove 44 is 0.4 times, 0.5 times, 0.6 times, 0.7 times, 0.8 times, etc., of the depth h1 of the groove 44. The thickness w2 between the second wall 432 and the inner wall of the groove 44 is greater than or equal to 0.4 times the depth h1 of the groove 44, to ensure that the thickness w2 between the second wall 432 and the inner wall of the groove 44 is large, to ensure the strength of this part, and to reduce the risk of partial fracture between the second wall 432 and the groove 44. The thickness w2 between the second wall 432 and the inner wall of the groove 44 is less than or equal to 0.8 times the depth h1 of the groove 44. When the specifications of the threaded connector 04 are certain, it is ensured that the depth h1 of the groove 44 can cooperate with the tool (such as a screwdriver, etc.) used to screw in and out the threaded connector 04, to ensure that the tool can drive the threaded connector 04 to screw in and out after it is inserted into the groove 44.

[0057] Continue reading Figure 9 The thickness w2 between the second wall 432 and the inner wall of the groove 44 is greater than or equal to 0.18 times the diameter d3 of the screw 42 (the diameter of the screw 42 is the nominal diameter of the threaded portion of the screw 42, i.e., the outer diameter of the threaded portion). Exemplarily, the thickness w2 between the second wall 432 and the inner wall of the groove 44 is 0.18 times, 0.19 times, 0.2 times, 0.21 times, 0.22 times, etc., of the diameter d3 of the screw 42. The thickness w2 between the second wall 432 and the inner wall of the groove 44 is greater than or equal to 0.18 times the diameter d3 of the screw 42 to ensure that the thickness w2 between the second wall 432 and the inner wall of the groove 44 is large, thereby ensuring the strength of this portion and reducing the risk of partial fracture between the second wall 432 and the groove 44.

[0058] Continue reading Figure 9The thickness w1 between the first wall 431 and the inner wall of the groove 44 is greater than or equal to 0.23 mm. For example, the thickness w1 between the first wall 431 and the inner wall of the groove 44 is 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.28 mm, 0.3 mm, 0.32 mm, etc. After the threaded connector 04 securely connects the middle frame 21 and the shaft stopper 03, the thickness w1 between the first wall 431 and the inner wall of the groove 44 is ensured to be large, ensuring the strength of this portion and reducing the risk of partial fracture between the first wall 431 and the groove 44. The thickness w2 between the second wall 432 and the inner wall of the groove 44 is greater than or equal to 0.23 mm. For example, the thickness w2 between the second wall 432 and the inner wall of the groove 44 is 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.28 mm, 0.3 mm, 0.32 mm, etc. This ensures that the thickness w2 between the second wall surface 432 and the inner wall of the groove 44 is large, thereby ensuring the strength of this portion and reducing the risk of partial fracture between the second wall surface 432 and the groove 44 .

[0059] Continue reading Figure 9 , the opening of the head 41 at the angle β between the surface S of the screw 42 and the second wall 432 is away from the groove 44. Wherein, 90°<β≤120°. Exemplarily, the angle β between the surface S of the head 41 facing the screw 42 and the second wall 432 is 91°, 95°, 110°, 115°, 120°, etc. The angle β between the surface S of the head 41 facing the screw 42 and the second wall 432 is greater than 90° to avoid stress concentration caused by too small an angle β at the connection between the second wall 432 and the head 41, thereby reducing the risk of fracture at the connection between the second wall 432 and the head 41. The angle β between the surface S of the head 41 facing the screw 42 and the second wall 432 is less than or equal to 120°, so as to avoid the second wall 432 from being tilted too much due to the angle β at the connection between the second wall 432 and the head 41 being too large, so that the thickness between the part of the second wall 432 facing the first wall 431 and the inner wall of the groove 44 is smaller, thereby reducing the risk of partial breakage between the second wall 432 and the groove 44.

[0060] Continue reading Figure 8 Along the axis N of the screw 42, the thickness t of the head 41 is less than or equal to 0.22 mm. For example, the thickness t of the head 41 is 0.18 mm, 0.19 mm, 0.20 mm, 0.21 mm, 0.22 mm, etc. The smaller thickness t of the head 41 reduces the space required for the connection between the shaft stopper 03 and the middle frame 21, leaving sufficient space for the back cover 22, thereby achieving a thinner and lighter display device.

[0061] Continue reading Figure 8, the depth h1 of the groove 44 is less than or equal to 0.35 mm. Exemplarily, the depth h1 of the groove 44 is 0.25 mm, 0.28 mm, 0.30 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, etc. The depth h1 of the groove 44 is small, which enables the groove 44 to extend less toward the connection portion 43. The first wall 431 and the second wall 432 are both inclined surfaces. When the groove 44 extends less toward the connection portion 43, the thickness between the first wall 431 or the second wall 432 and the inner wall of the groove 44 becomes larger, thereby reducing the risk of partial breakage between the outer peripheral side of the threaded connector 04 and the groove 44 through the strength of the connection portion 43.

[0062] Continue reading Figure 8 Along the axial direction N of the screw 42, the distance h2 between the side wall of the groove 44 facing one end of the screw 42 and the open end of the groove 44 is less than or equal to 0.25 mm. The distance h2 between the side wall of the groove 44 facing one end of the screw 42 and the open end of the groove 44 is 0.20 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, and 0.25 mm. The less the side wall of the groove 44 extends toward the side where the screw 42 is located, that is, the greater the thickness between the side wall of the groove 44 and the second wall surface 432, thereby reducing the risk of partial fracture between the outer peripheral side of the threaded connector 04 and the groove 44 through the strength of the connecting portion 43.

[0063] Continue reading Figure 9 , the diameter d3 of the screw 42 is less than or equal to 1.2 mm. The diameter d3 of the screw 42 is 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm. The diameter d3 of the screw 42 is small, and the through hole 31 (such as Figure 5 As shown) and threaded hole 211 (as Figure 5 The size of the middle frame 21 (as shown) can also be smaller. Figure 5 As shown), shaft limit block 03 (as shown Figure 5 The size required for the connection is smaller, which is conducive to the miniaturization and thinness of the display device 100.

[0064] See also Figure 10 , Figure 10 for Figure 5In the enlarged view at point C, a threaded hole 211 is formed in the middle frame 21. The screw 42 is threadedly connected to the threaded hole 211. The head 41 is located on the side of the through-hole 31 facing away from the threaded hole 211 and abuts against the shaft stop 03. The threaded connector 04 passes through the through-hole 31 of the shaft stop 03 and is threadedly connected to the middle frame 21, thereby securing the shaft stop 03 and the middle frame 21. The inner wall of the threaded hole 211 facing the through-hole 31 has a third wall 212. The third wall 212 is inclined away from the axis of the screw 42 along the direction from the screw 42 to the head 41. The connecting portion 43 is located in the space enclosed by the inner wall of the through-hole 31 and the third wall 212. With the dimensions of the threaded hole 211 fixed, the third wall 212 is tilted away from the axis of the screw 42 to increase the space enclosed by the inner wall of the through hole 31 and the third wall 212, thereby allowing the space to accommodate the portion of the junction of the first wall 431 and the second wall 432 that protrudes away from the groove 44. While increasing the thickness between the first wall 431 and the second wall 432 and the inner wall of the groove 44, both the first wall 431 and the second wall 432 can be accommodated within the space enclosed by the inner wall of the through hole 31 and the third wall 212.

[0065] Continue reading Figure 10 , the angle between the surface of the middle frame 21 facing the head 41 and the third wall 212 is γ. Among them, 135°<γ≤170°. Exemplarily, the angle γ between the surface of the middle frame 21 facing the head 41 and the third wall 212 is 136°, 140°, 145°, 150°, 160°, 165°, 170°, etc. When the angle γ between the surface of the middle frame 21 facing the head 41 and the third wall 212 is greater than 135°, the height dimension occupied by the third wall 212 (i.e., the dimension along the circumference of the screw 42) can be smaller while the opening size of the threaded hole 211 facing the head 41 and the height of the threaded portion remain unchanged, and the total depth of the threaded hole 211 remains unchanged, thereby leaving space for the threaded portion of the threaded hole 211. When the display device 100 is made thinner and lighter and the size of the middle frame 21 is smaller, the depth of the threaded hole 211 opened on the middle frame 21 also needs to be designed to be smaller. By reducing the height occupied by the third wall 212, the stability of the connection between the threaded portion of the threaded hole 211 and the threaded connector 04 is ensured.

[0066] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A display device, characterized in that: include: Middle frame, shaft limit block and threaded connector; The threaded connector is fixedly connected to the middle frame and the shaft limit block; a through hole is formed on the shaft limit block; The threaded connector includes: a head, a screw and a connecting portion, wherein the connecting portion connects the head and the screw; the head has a groove, and the groove extends into the connecting portion; The radial dimension of the first connection between the connecting portion and the head is greater than the radial dimension of the second connection between the connecting portion and the screw; The outer wall surface of the connecting portion includes a first wall surface and a second wall surface, wherein the first wall surface and the second wall surface are both inclined surfaces; the first wall surface is closer to the screw rod than the second wall surface; at least a portion of the first wall surface is located in the through hole; A connection point between the first wall surface and the second wall surface protrudes in a direction away from the groove.

2. The display device according to claim 1, wherein The opening of the included angle α between the first wall surface and the second wall surface faces the groove, and 120°≤α≤150°.

3. The display device according to claim 1 or 2, characterized in that The thickness between the second wall surface and the inner wall of the groove is 0.4 times to 0.8 times the depth of the groove.

4. The display device according to claim 1 or 2, characterized in that The thickness between the second wall surface and the inner wall of the groove is greater than or equal to 0.18 times the diameter of the screw.

5. The display device according to claim 1 or 2, characterized in that: The thickness between the first wall surface and the inner wall of the groove is greater than or equal to 0.23 mm; The thickness between the second wall surface and the inner wall of the groove is greater than or equal to 0.23 mm.

6. The display device according to claim 1 or 2, characterized in that The opening of the head facing the screw rod and the second wall at an angle β faces away from the groove; Among them, 90°<β≤120°.

7. The display device according to claim 1 or 2, characterized in that: Along the axial direction of the screw, the thickness of the head is less than or equal to 0.22 mm.

8. The display device according to claim 1 or 2, characterized in that: The depth of the groove is less than or equal to 0.35 mm.

9. The display device according to claim 1 or 2, characterized in that: Along the axial direction of the screw, a distance between an end of the side wall of the groove facing the screw and an open end of the groove is less than or equal to 0.25 mm.

10. The display device according to claim 1 or 2, characterized in that: A threaded hole is formed on the middle frame, the screw is threadedly connected to the threaded hole, the head is located on a side of the through hole away from the threaded hole, and abuts against the shaft limit block; The inner wall of the threaded hole facing the through hole has a third wall surface, which is inclined in a direction away from the axis of the screw along the direction of the screw pointing to the head; The connecting portion is located in a space surrounded by the inner wall of the through hole and the third wall surface.

11. The display device according to claim 10, wherein: The included angle between the surface of the middle frame facing the head and the third wall is γ; Among them, 135°<γ≤170°.

12. The display device according to claim 1 or 2, characterized in that: The diameter of the screw is less than or equal to 1.2 mm.

13. A threaded connector, characterized in that: include: A head, a screw and a connecting portion, wherein the connecting portion connects the head and the screw; The head portion has a groove, and the groove extends into the connecting portion; The radial dimension of the first connection between the connecting portion and the head is greater than the radial dimension of the second connection between the connecting portion and the screw; The outer wall surface of the connecting portion includes a first wall surface and a second wall surface, and the first wall surface and the second wall surface are both inclined surfaces; The first wall surface is closer to the screw than the second wall surface; A connection point between the first wall surface and the second wall surface protrudes in a direction away from the groove.

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