Middle frame and electronic equipment

Abstract

The utility model provides a middle frame and electronic equipment, and the middle frame comprises a middle plate and a supporting plate, the middle plate is provided with a mounting hole, and the mounting hole penetrates through the middle plate in the thickness direction of the middle plate; the middle plate comprises a first surface, and the first surface surrounds the mounting hole; the supporting plate comprises a body part, the body part comprises a first supporting surface, a second supporting surface and a supporting side surface, and the first supporting surface is opposite to the second supporting surface; the supporting side surface is connected between the first supporting surface and the second supporting surface; an avoiding groove is concavely formed in the edge of the first supporting surface and penetrates through the supporting side surface; the supporting plate is connected with the middle plate, the second supporting surface covers the mounting hole, and the first supporting surface and the first surface face the same direction; the first supporting surface protrudes relative to the first surface; the receding groove is located between the first surface and the first supporting face. The receding groove is formed in the edge of the first supporting face so that the sharp corner between the first supporting face and the supporting side face can be removed. The display screen can be prevented from being damaged by sharp corners between the first supporting face and the supporting side faces.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a middle frame and an electronic device. Background Art

[0002] Mobile phones and other electronic products are becoming increasingly thinner and lighter, especially foldable electronic devices, which have a larger display area and are therefore heavier. To increase portability, foldable electronic devices are more focused on thinner and lighter designs.

[0003] In general electronic devices, the display screen is supported by the middle frame and other parts, and the battery and other components are contained. In order to reduce the weight of the middle frame and make the electronic device thinner and lighter, the frame and middle plate of the middle frame are currently made of materials with greater structural strength, while the support plate supporting the battery is made of lightweight materials such as aluminum, and then the support plate and the middle plate are fixedly connected.

[0004] However, after the support plate and the middle plate are assembled, the surface of the support plate and the surface of the middle plate are not flush due to processing and assembly errors, which in turn causes the display screen to be damaged by the sharp corners of the support plate. Utility Model Content

[0005] The present application provides a middle frame and an electronic device, wherein a support plate will not damage a display screen.

[0006] In a first aspect, the present application provides a middle frame, comprising a frame, a middle plate and a support plate. The frame is arranged around the middle plate, and the middle plate comprises a first surface and a second surface arranged opposite to each other. The middle plate is provided with a mounting hole, and the mounting hole passes through the first surface and the second surface.

[0007] The support plate body includes a first support surface, a second support surface and a support side surface. The first support surface and the second support surface are opposite to each other along the thickness direction of the support plate. The support side surface is connected between the first support surface and the second support surface. An avoidance groove is concavely provided on the edge of the first support surface, and the avoidance groove runs through the support side surface.

[0008] The support plate is fixed to the middle plate, and the second support surface of the support plate covers the mounting hole. The second support surface and the hole wall of the mounting hole enclose a battery storage compartment, and the battery storage compartment is used to install the battery. The first surface and the first support surface face the same direction, and the first support surface is raised relative to the first surface. The second surface and the second support surface face the same direction.

[0009] The middle frame can be applied to an electronic device, which also includes a display screen, and the display screen is stacked on the first surface and the first support surface. In the present application, the first support surface is set to be raised relative to the first surface so that the gap between the first support surface and the display screen is smaller, so that the display screen is better supported and the display screen is prevented from being suspended in the air. Prevent the user from feeling a void when pressing the display screen, and enhance the user's touch when pressing the display screen. In the present application, an avoidance groove is set on the edge of the first support surface to remove the sharp corner between the first support surface and the support side surface, so that the sharp corner between the first support surface and the support side surface can be prevented from damaging the display screen.

[0010] Typically, the display screen is bonded to the first surface and the first supporting surface by adhesive. Specifically, the display screen and the first supporting surface are bonded and fixed by the first adhesive, and the second adhesive is located at the edge of the first supporting surface. The display screen and the first surface are bonded by the second adhesive, and the second adhesive substantially covers the first surface. By setting the first supporting surface to be raised relative to the first surface, the gap between the area of ​​the first supporting surface where the first adhesive is not set and the display screen is smaller, so that the display screen can be better supported.

[0011] In the present application, when assembling the display screen, it is necessary to activate the first adhesive and the second adhesive by rolling to activate the viscosity of the first adhesive and the second adhesive, so that the first adhesive can bond the display screen to the first supporting surface, and the second adhesive can bond the display screen to the first surface.

[0012] In addition, in the present application, an avoidance groove is provided at the edge of the first supporting surface to remove the sharp angle between the first supporting surface and the supporting side surface. The avoidance groove is located between the second adhesive and the first supporting surface, so that when the second adhesive is activated by rolling, the sharp angle between the first supporting surface and the supporting side surface can be prevented from damaging the display screen, and the step difference between the first supporting surface and the first surface can be prevented from affecting the activation of the second adhesive.

[0013] In some embodiments, the first support surface is rectangular, and the avoidance groove is offset from at least one corner of the first support surface. When the electronic device is a candy-bar mobile phone, etc., the first support surface may include four corners. The avoidance groove is offset from at least one corner. Then, when the electronic device falls and the corner is a force point, because the avoidance groove is offset from the corner of the support plate, the structural strength of the corner position of the support plate is greater, which can reduce the risk of deformation of the corner of the support plate, thereby reducing the risk of deformation of the support plate and squeezing the display screen, and reducing the risk of failure of the display screen.

[0014] In some embodiments, the first support surface includes a first corner and a second corner, and the first corner and the second corner are opposite to each other along the length direction of the support plate. The avoidance groove is staggered with the first corner, and the avoidance groove is staggered with the second corner. When the electronic device is a foldable electronic device, for example, when the electronic device is a foldable mobile phone, the foldable mobile phone includes two middle frames, and the foldable mobile phone also includes a rotating mechanism, and the two middle frames are connected by the rotating mechanism to realize the unfolding and folding of the foldable mobile phone. The middle frame also includes a bearing member, which is arranged on one side of the middle plate and connected to the two ends of the opening of the frame, and the bearing member is used to carry the rotating surface mechanism. The first corner and the second corner are both located on the side of the support plate away from the bearing member. Therefore, when the support plate is applied to a foldable electronic device, it is only necessary that the first corner and the second corner are staggered with the avoidance groove, so that when the foldable electronic device falls and the corner position is a force point, the support plate can be prevented from being deformed, and the risk of the display screen being damaged by the support plate can be reduced.

[0015] In some embodiments, the first support surface further includes a first edge, a second edge, and a third edge. The first edge is connected between the first corner and the second corner. The second edge and the third edge are opposite to each other along the length direction of the support plate, one end of the second edge is connected to the first corner, and one end of the third edge is connected to the second corner. The avoidance groove includes a first avoidance groove, a second avoidance groove, and a third avoidance groove, the first avoidance groove is arranged at the first edge, the second avoidance groove is arranged at the second edge, and the third avoidance groove is arranged at the third edge.

[0016] The first avoidance groove can prevent the first edge from generating sharp corners to damage the display screen, and prevent the step difference between the first edge and the first surface from affecting the activation of the second adhesive. The second avoidance groove can prevent the second edge and the first surface from generating sharp corners to damage the display screen, and prevent the step difference between the second edge and the first surface from affecting the activation of the second adhesive. The third avoidance groove can prevent the third edge and the first surface from generating sharp corners to damage the display screen, and prevent the step difference between the third edge and the first surface from affecting the activation of the second adhesive.

[0017] In some embodiments, the length L1 of the first avoidance groove is less than the length S1 of the first edge, the length L2 of the second avoidance groove is less than the length S2 of the second edge, and the length L3 of the third avoidance groove is less than the length S3 of the third edge. Thus, the support plate can have sufficient structural strength to prevent the support plate from deforming and squeezing the display screen. It can also prevent the sharp corners of the support plate from damaging the display screen, and prevent the second adhesive from being inactivated. On the other hand, when processing the support plate, the thicker original sheet is first pressed so that the original sheet becomes a thinner intermediate sheet, and then the edge of the intermediate sheet is pressed so that the intermediate sheet forms a support plate. That is, the processing of the avoidance groove is the second process. It can be understood by those skilled in the art that the longer the length of the avoidance groove, the lower the yield of the support plate. On the contrary, the shorter the length of the avoidance groove, the higher the yield of the support plate. Therefore, the length of the first avoidance groove, the second avoidance groove and the third avoidance groove is shortened, and the processing yield of the support plate can also be improved.

[0018] In some embodiments, the length L1 of the first avoidance groove and the length S1 of the first edge satisfy the following condition: S1>L1≥0.5S1. The length L2 of the second avoidance groove and the length S2 of the second edge satisfy the following condition: S2>L2≥0.5S2. The length L3 of the third avoidance groove is less than the length S3 of the third edge and satisfies the following condition: L3≤0.5S3. When the above conditions are met, the structural strength of the support plate and the degree of activation of the second adhesive are good, and the damage to the display screen is small. In addition, the processing yield of the support plate can also be improved.

[0019] In some embodiments, the first avoidance groove includes a first sub-groove and a second sub-groove, and the first sub-groove and the second sub-groove are spaced apart along the length direction of the support plate, thereby further improving the processing yield of the support plate.

[0020] In some embodiments, the first support surface further includes a third corner and a fourth corner, the third corner connects an end of the second edge away from the first corner, and the fourth corner connects an end of the third edge away from the second corner. The avoidance groove includes a fourth avoidance groove and a fifth avoidance groove, the fourth avoidance groove is provided at the third corner, and the fifth avoidance groove is provided at the fourth corner. Thus, when the first adhesive is activated by rolling, the display screen can be prevented from moving downward to press the support plate, thereby preventing the support plate from deforming, and preventing the deformed support plate from pressing the display screen.

[0021] In some embodiments, the first support surface further includes a fourth edge, and the fourth edge is connected between the third corner and the fourth corner. The fourth edge is used to set the first adhesive. Along the length direction of the support plate, there is a first spacing A1 between the first adhesive and the fourth avoidance groove, and there is a second spacing A2 between the first adhesive and the fifth avoidance groove.

[0022] In some embodiments, the avoidance groove includes an avoidance side surface and an avoidance bottom surface, the avoidance bottom surface is parallel to the first support surface, the avoidance side surface is connected between the first support surface and the avoidance bottom surface, and the avoidance side surface and the first support surface have a smooth transition, which can prevent sharp corners from appearing between the groove side surface and the first support surface, thereby preventing the sharp corners from damaging the display screen.

[0023] In some embodiments, the avoidance groove includes an avoidance bottom surface, and the support plate also includes a connecting portion, which is connected to the supporting side surface; the connecting portion includes a first connecting surface, and the avoidance bottom surface, the first connecting surface, and the first supporting surface are all oriented in the same direction; the first connecting surface is sunken relative to the avoidance bottom surface to form a first step groove; the first step groove is located between the avoidance groove and the first surface. The first step groove and the avoidance groove form a continuous step groove, and the first step groove is lower than the avoidance groove, so that the part of the second adhesive close to the support plate can be better stressed, so that the second adhesive is fully activated, and the bonding reliability of the display screen is improved.

[0024] In some embodiments, a smooth transition is formed between the avoidance bottom surface and the first connection surface, thereby preventing an angle from forming between the avoidance bottom surface and the first connection surface, thereby preventing the display screen from being damaged.

[0025] In some embodiments, the connection portion further includes a second connection surface, which is opposite to the first connection surface along the thickness direction of the support plate; a connection groove is concavely provided on the first surface, and a protrusion is provided in the connection groove; the second connection surface is stacked on the protrusion, and the second connection surface covers the connection groove; the connection groove is used to set a third adhesive, and the third adhesive is bonded to the second connection surface. The support plate and the middle plate are bonded and fixed, thereby increasing the structural stability of the middle frame.

[0026] In some embodiments, the connection portion is provided with a connection ear, the connection ear includes a third connection surface, the third connection surface and the first connection surface are oriented in the same direction, and the third connection surface is sunken relative to the first connection surface to form a second step groove; the middle frame also includes a fastener, the connection ear and the middle plate are connected by the fastener, and a part of the fastener is located in the second step groove. The fastener can be specifically a screw. The fastener includes a rod and a head. When the fastener is connected to the connection ear and the middle plate, the head is located in the second step groove, and the rod is inserted into the connection ear and the middle plate, so that the support plate and the middle plate are fixedly connected, thereby increasing the reliability of the connection between the support plate and the middle plate.

[0027] In some embodiments, the third connection surface and the first connection surface have a smooth transition, which can prevent sharp corners from appearing between the first connection surface and the third connection surface, thereby preventing the sharp corners from damaging the display screen.

[0028] The second aspect of the present application provides an electronic device, comprising a display screen and the middle frame of the first aspect of the present application. The display screen is stacked on the first surface and the first supporting surface.

[0029] In some embodiments, the display screen is bonded to the first support surface by a first adhesive, and the display screen is bonded to the first surface by a second adhesive; the thickness of the first adhesive is less than the thickness of the second adhesive. The first support surface is raised relative to the first surface, and by setting the thickness of the first adhesive to be less than the thickness of the second adhesive, the first adhesive and the second adhesive are flush with the surface of the display screen, and the distance between the portion of the first support surface where the first adhesive is not set and the display screen is very small, for example, it can be 0.03mm. That is, the maximum gap between the display screen and the first support surface is 0.03mm, which can enhance the user's touch and allow the display screen to be better supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0031] Figure 1 It is a schematic diagram of the structure of an electronic device in a folded state provided by an embodiment of the present application.

[0032] Figure 2 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application in an unfolded state.

[0033] Figure 3 It is a schematic diagram of the structure of the middle frame of the electronic device provided in an embodiment of the present application.

[0034] Figure 4 yes Figure 3 Schematic diagram of the split structure of the middle frame shown in .

[0035] Figure 5 yes Figure 4 A schematic diagram of the partial structure of the middle frame shown in FIG.

[0036] Figure 6 yes Figure 5 A is an enlarged structural diagram of FIG.

[0037] Figure 7 yes Figure 4 A schematic structural diagram of the support plate of the middle frame is shown in FIG.

[0038] Figure 8 yes Figure 4 A structural schematic diagram of another perspective of the support plate of the middle frame is shown in FIG.

[0039] Fig. 9 yes Figure 7 AA section structure schematic diagram.

[0040] Fig.10 yes Figure 4 BB section structure schematic diagram.

[0041] Fig.11 yes Fig.10 Schematic diagram of the enlarged structure at B.

[0042] Fig.12 yes Figure 4 Schematic diagram of the CC section structure.

[0043] Fig.13 yes Figure 4 A structural schematic diagram of the support plate of the middle frame from another perspective is shown in FIG.

[0044] Fig.14 It is a partial structural diagram of an electronic device provided in another embodiment of the present application.

[0045] Description of reference numerals: 1000-electronic device, 1100-main body, 100-housing, 110-middle frame, 120-frame, 130-middle plate, 131-first surface, 131a-first sub-surface, 131b-second sub-surface, 131c-third sub-surface, 132-second surface, 133-mounting hole, 134-connecting groove, 134a-connecting bottom surface, 134b-connecting side surface, 135-first connecting hole, 136-raised portion, 137-raised side surface, 138-raised surface, 140-carrying member, 150-fastener, 160-first adhesive, 170-second adhesive, 171-first adhesive section, 172-second adhesive section, 173-third adhesive section, 180-third adhesive, 10-support plate, 10a-main body, 10b-connecting portion, 11-first supporting surface, 12 -Second supporting surface, 13-supporting side, 14-connecting ear, 15-second connecting hole, 16-avoidance groove, 17-avoidance side, 18-avoidance bottom surface, 19-first edge, 20-second edge, 21-third edge, 22-fourth edge, 23-first corner, 24-second corner, 25-third corner, 26-fourth corner, 27-first avoidance groove, 28-second avoidance groove, 29-third avoidance groove, 30-fourth avoidance groove, 31-fifth avoidance groove, 32-first sub-groove, 33-second sub-groove, 34-first connecting surface, 35-second connecting surface, 36-first step groove, 37-third connecting surface, 38-fourth connecting surface, 40-second step groove, 200-rotating mechanism, 1200-display screen, 1210-first display part, 1220-second display part, 1230-third display part. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0047] See also Figure 1 and Figure 2 , this application provides please refer to Figure 1 and Figure 2 , Figure 1 It is a schematic structural diagram of the electronic device 1000 provided in an embodiment of the present application in a folded state. Figure 2 It is a structural schematic diagram of the electronic device 1000 provided in an embodiment of the present application in an unfolded state.

[0048] Figure 1 The folding angle of the electronic device 1000 shown in FIG. 1 is 0 degrees. Figure 2 The unfolding angle of the electronic device 1000 is 180 degrees. The electronic device 1000 includes but is not limited to a foldable cell phone, a straight phone, a notebook computer, a tablet personal computer, a personal digital assistant, a wearable device or a mobile device, etc. In the embodiment of the present application, the electronic device 1000 is a foldable cell phone as an example for description.

[0049] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have slight deviations. Figure 1 The deviation of the folding angle of the electronic device 1000 shown in FIG. 1 from 0 degree can be ±5 degrees. Figure 2 The unfolded angle of the electronic device 1000 shown is 180 degrees, and the deviation may be ±5 degrees.

[0050] For ease of description, the width direction of the electronic device 1000 is defined as the X-axis direction, the length direction of the electronic device 1000 is defined as the Y-axis direction, and the thickness direction of the electronic device 1000 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0051] The electronic device 1000 includes a main body 1100 and a display screen 1200, and the display screen 1200 is installed on the main body 1100. The display screen 1200 is a flexible screen, and the display screen 1200 includes a display surface and a mounting surface, and the display surface and the mounting surface are arranged opposite to each other. The display surface is used to display text, images, videos, etc. The display screen 1200 includes a first display part 1210, a second display part 1220 and a third display part 1230. The third display part 1230 is located between the first display part 1210 and the second display part 1220.

[0052] Please continue to refer to Figure 1The main body 1100 includes two shells 100 and a rotating mechanism 200. The rotating mechanism 200 is installed on the two shells 100 to realize the rotating connection between the two shells 100. The two shells 100 can rotate relative to each other through the rotating mechanism 200, so that the main body 1100 can switch between the folded state and the unfolded state.

[0053] The display screen 1200 is mounted on the main body 1100, and the mounting surface is fixedly connected to the main body 1100. Specifically, the first display portion 1210 is fixedly mounted on one of the housings 100, and the second display portion 1220 is fixed on the other housing 100. The rotating mechanism 200 is arranged opposite to the third display portion 1230 to achieve the bending of the display screen 1200. The third display portion 1230 is not fixed to the rotating mechanism 200. The side of the two housings 100 facing away from the display screen 1200 is the outer side of the electronic device 1000, and the side carrying the display screen 1200 is the inner side.

[0054] In some embodiments, reference Figure 3 and Figure 4 , Figure 3 is a schematic structural diagram of a middle frame 110 of an electronic device 1000 provided in an embodiment of the present application, Figure 4 yes Figure 3 1 is a schematic diagram of the split structure of the middle frame 110. Specifically, the housing 100 includes the middle frame 110 and a back plate (not shown). The back plate and the display screen 1200 are respectively arranged on two opposite sides of the middle frame 110 along the thickness direction thereof. The middle frame 110 is provided with a battery receiving compartment for installing batteries, and the back plate can close the battery receiving compartment.

[0055] The middle frame 110 includes a frame 120, a middle plate 130, a carrier 140, a support plate 10, a fastener 150, a first adhesive 160, a second adhesive 170 and a third adhesive 180. The frame 120 can be in a "ㄈ" shape, the middle plate 130 can be in a rectangular shape, and the frame 120 is arranged around the three outer peripheral edges of the middle plate 130. The carrier 140 is arranged at the opening of the frame 120, and the opposite ends of the carrier 140 along its length direction are respectively fixed to the two ends of the opening of the frame 120. That is, the frame 120 and the carrier 140 enclose a rectangular frame. One side of the carrier 140 is fixed to one side of the middle plate 130, the carrier 140 is L-shaped, and the carrier 140 is provided with a receiving groove (not shown), and the receiving groove is used to accommodate the rotating mechanism 200. The frame 120, the middle plate 130 and the bearing member 140 can be made of materials with strong structural strength such as stainless steel or titanium alloy to ensure the structural strength of the housing 100. The support plate 10 can be made of lightweight materials such as aluminum to make the housing 100 thinner and lighter.

[0056] In some embodiments, reference Figure 4The fastener 150 may be a screw or a bolt. The fastener 150 includes a head and a rod. The head is fixed to one end of the rod, and the outer diameter of the head is greater than the outer diameter of the rod. The fastener 150 is used to connect the support plate 10 and the middle plate 130.

[0057] In some embodiments, reference Figure 4 , the first adhesive 160 is in the shape of a long strip. The second adhesive 170 includes a first adhesive section 171, a second adhesive section 172 and a third adhesive section 173, and the first adhesive section 171, the second adhesive section 172 and the third adhesive section 173 are connected in a "ㄈ" shape. The first adhesive 160 is used to bond the display screen 1200 to the support plate 10, and the second adhesive 170 is used to bond the display screen 1200 to the middle plate 130. The third adhesive 180 is in the shape of a rectangular frame, and the third adhesive 180 is used to bond the support plate 10 to the middle plate 130.

[0058] In some embodiments, reference Figure 5 and Figure 6 , Figure 5 yes Figure 4 A partial structural diagram of the middle frame 110 is shown in FIG. Figure 6 yes Figure 5 The length direction, width direction and thickness direction of the middle plate 130 are parallel to the Y-axis direction, the X-axis direction and the Z-axis direction respectively. The middle plate 130 includes a first surface 131 and a second surface 132. Along the thickness direction of the middle plate 130, the first surface 131 and the second surface 132 are opposite to each other. The first surface 131 is used to set the second adhesive 170.

[0059] The middle plate 130 is provided with a mounting hole 133 and a connecting groove 134 . The mounting hole 133 is rectangular and penetrates the middle plate 130 along the thickness direction of the middle plate 130 , that is, the mounting hole 133 penetrates the first surface 131 and the second surface 132 .

[0060] The connecting groove 134 is recessed in the first surface 131, and the connecting groove 134 surrounds the mounting hole 133. The connecting groove 134 has a connecting bottom surface 134a and a connecting side surface 134b, and the connecting side surface 134b is parallel to the Z-axis direction. The connecting bottom surface 134a and the first surface 131 face the same direction and are parallel to the first surface 131. The connecting side surface 134b is connected between the first surface 131 and the connecting bottom surface 134a. The connecting bottom surface 134a is recessed with a first connecting hole 135, and the first connecting hole 135 is used to connect the support plate 10. The connecting bottom surface 134a is convexly provided with a protrusion 136, and the protrusion 136 surrounds the mounting hole 133, and the protrusion 136 is located between the mounting hole 133 and the connecting groove 134. The raised portion 136 has a raised surface 138 and a raised side 137. The raised surface 138 and the first surface 131 face the same direction, the raised side 137 is parallel to the Z-axis direction, and the raised side 137 is connected between the connection bottom surface 134a and the raised surface 138. The raised surface 138 and the connection side 134b are spaced apart from each other, and the connection groove 134 is used to accommodate the third adhesive 180. Specifically, the third adhesive 180 can be set in the space between the raised surface 138 and the connection side 134b. In this embodiment, the raised portion 136 is a continuous rectangular frame. In other embodiments, the raised portion 136 can also include a plurality of raised segments, and the plurality of raised segments are spaced apart and arranged around the mounting hole 133.

[0061] The first surface 131 includes a first sub-surface 131a, a second sub-surface 131b and a third sub-surface 131c, which are connected in a “ㄈ” shape. The second sub-surface 131b is spaced apart from the carrier 140 along the X-axis direction.

[0062] For some examples, please refer to Figure 7 and Figure 8 , Figure 7 yes Figure 4 The structural diagram of the support plate 10 of the middle frame 110 is shown in FIG. Figure 8 yes Figure 4 Schematic diagram of the structure of the support plate 10 of the middle frame 110 from another perspective is shown in . The length direction, width direction and thickness direction of the support plate 10 are parallel to the Y-axis direction, the X-axis direction and the Z-axis direction, respectively. The support plate 10 can be rectangular, and the support plate 10 includes a main body 10a and a connecting part 10b. The main body 10a is rectangular, and the main body 10a includes a first supporting surface 11, a second supporting surface 12 and a supporting side surface 13. Along the thickness direction of the support plate 10, the first supporting surface 11 and the second supporting surface 12 are opposite to each other, and the supporting side surface 13 is connected between the first supporting surface 11 and the second supporting surface 12. The first supporting surface 11 is used to set the first adhesive 160 and to support the display screen 1200.

[0063] The edge of the first support surface 11 is concavely provided with an avoidance groove 16, and the avoidance groove 16 penetrates the support side surface 13. The avoidance groove 16 includes an avoidance side surface 17 and an avoidance bottom surface 18, the avoidance bottom surface 18 is parallel to the first support surface 11, the avoidance side surface 17 is parallel to the Z-axis direction, one side of the avoidance side surface 17 is connected to the avoidance bottom surface 18, and the other side of the avoidance side surface 17 is connected to the first support surface 11. In other embodiments, the avoidance side surface 17 can be arc-shaped, which can prevent the formation of a sharp corner between the avoidance side surface 17 and the first support surface 11 to damage the display screen 1200. In other embodiments, the sharp corners are removed by rounding the avoidance side surface 17 and the first support surface 11.

[0064] refer to Figure 7 and Fig. 9 , Fig. 9 yes Figure 7 AA section structural diagram. The connecting portion 10b is in the shape of a rectangular frame, and the connecting portion 10b is arranged on the outer periphery of the main body 10a. Specifically, the connecting portion 10b is connected to the supporting side surface 13 and extends in the direction away from the supporting side surface 13. The connecting portion 10b includes a first connecting surface 34 and a second connecting surface 35. Along the Z-axis direction, the first connecting surface 34 and the second connecting surface 35 are opposite to each other, and the first connecting surface 34, the first supporting surface 11 and the avoidance bottom surface 18 are in the same direction. The first connecting surface 34 sinks relative to the avoidance bottom surface 18 to form a first step groove 36. The second connecting surface 35 protrudes relative to the second supporting surface 12. The avoidance groove 16 and the first step groove 36 are continuous downward step grooves. There is a smooth transition between the avoidance bottom surface 18 and the first connecting surface 34 to prevent sharp corners between the avoidance bottom surface 18 and the first connecting surface 34 from damaging the display screen 1200. The smooth transition here means that a part of the first connecting surface 34 is arc-shaped.

[0065] Continue to refer Figure 7 and Fig. 9 , the connecting portion 10b is provided with a connecting ear 14, specifically, the connecting ear 14 can be multiple, and the multiple connecting ears 14 are arranged at intervals. Part of the connecting ears 14 can be connected to the four corner positions of the connecting portion 10b, and the other part of the connecting ears 14 can be formed by bending a part of the connecting portion 10b. The connecting ear 14 includes a third connecting surface 37 and a fourth connecting surface 38. Along the Z-axis direction, the third connecting surface 37 and the fourth connecting surface 38 are opposite to each other, the third connecting surface 37 and the first connecting surface 34 are in the same direction, and the third connecting surface 37 sinks relative to the first connecting surface 34 to form a second step groove 40. The fourth connecting surface 38 is raised relative to the second connecting surface 35. The first step groove 36 and the second step groove 40 are in a continuous step shape. There is a smooth transition between the third connecting surface 37 and the first connecting surface 34 to prevent sharp corners between the third connecting surface 37 and the first connecting surface 34 from damaging the display screen 1200. The smooth transition here means that a part of the third connecting surface 37 can be arc-shaped.

[0066] In some embodiments, reference Fig.10 , Fig.10 yes Figure 4 BB section structure schematic diagram. The support plate 10 is fixed to the middle plate 130. Specifically, along the thickness direction of the middle frame 110, the main body 10a of the support plate 10 covers the mounting hole 133, the second connection surface 35 of the connection portion 10b is stacked with the raised surface 138 of the raised portion 136, and the second connection surface 35 of the connection portion 10b covers the connection groove 134. The third adhesive 180 is arranged in the connection groove 134 and is located between the raised side surface 137 and the connection side surface 134b. The third adhesive 180 is bonded to the second connection surface 35 of the connection portion 10b and the connection bottom surface 134a, so that the support plate 10 and the middle plate 130 are bonded and fixed. In addition, the connecting ear 14 extends into the connecting groove 134, so that the first connecting hole 135 and the second connecting hole 15 are coaxial and connected, and then the rod of the fastener 150 can be set in the first connecting hole 135 and the second connecting hole 15 to fix the support plate 10 and the middle plate 130. The head of the fastener 150 is located in the second step groove 40 to prevent the head of the fastener 150 from damaging the display screen 1200. It can be seen that the support plate 10 and the middle plate 130 are doubly fixed by the third adhesive 180 and the fastener 150, and the reliability of the connection between the support plate 10 and the middle plate 130 is high.

[0067] refer to Fig.11 and Fig.12 , Fig.11 yes Fig.10 The enlarged structural diagram of point B is shown in Figure 1. Fig.12 yes Figure 4 Schematic diagram of the CC cross-sectional structure. The first surface 131, the first supporting surface 11, the avoidance bottom surface 18, the first connecting surface 34 and the second connecting surface 35 are all oriented in the same direction, the second surface 132, the second supporting surface 12, the third connecting surface 37 and the fourth connecting surface 38 are all oriented in the same direction, and the second supporting surface 12 and the hole wall surface of the mounting hole 133 enclose a battery accommodating compartment. The first supporting surface 11, the avoidance groove 16, the first step groove 36 and the first surface 131 are arranged in sequence, that is, the avoidance groove 16 and the first step groove 36 are both located between the first supporting surface 11 and the first surface 131. The first supporting surface 11 is raised relative to the first surface 131, and the distance D0 between the first supporting surface 11 and the first surface 131 is 0.07mm. The depth D1 of the avoidance groove 16 is 0.05mm, and the depth D2 of the first step groove 36 is 0.07mm.

[0068] The first adhesive 160 is bonded to the side of the first support surface 11 close to the carrier 140. The first bonding section 171, the second bonding section 172 and the third bonding section 173 of the second adhesive 170 are respectively bonded to the first sub-surface 131a, the second sub-surface 131b and the third sub-surface 131c of the first surface 131. The first adhesive 160 and the second adhesive 170 can be enclosed into a rectangular frame. The display screen 1200 is stacked on the first support surface 11 and the first surface 131, and the display screen 1200 is bonded to the first support surface 11 by the first adhesive 160, and the display screen 1200 is bonded to the first surface 131 by the second adhesive 170. Along the length direction of the support plate 10, there is a first spacing A1 between one end of the first adhesive 160 and the avoidance groove 16, and there is a second spacing A2 between the other end of the first adhesive 160 and the avoidance groove 16. The first spacing A1 satisfies the following condition: A1 ≥ 4 mm, and the second spacing A2 satisfies the following condition: A2 ≥ 4 mm, thereby preventing the first adhesive 160 from entering the avoidance groove 16 .

[0069] When assembling the display screen 1200, firstly, a first adhesive material is set on the first support surface 11, and the thickness of the first adhesive material is 0.05 mm, and a second adhesive material is set on the first surface 131. Then, the display screen 1200 is stacked on the first support surface 11 and the first surface 131, and then the first adhesive material and the second adhesive material are activated by rolling. At this time, the first adhesive material will become thinner and become the first adhesive 160, so that the bonding performance of the first adhesive 160 is better. The thickness H1 of the first adhesive 160 is 0.03 mm. The second adhesive material will become the second adhesive 170, and the thickness H2 of the second adhesive 170 is 0.1 mm.

[0070] The first supporting surface 11 is raised relative to the first surface 131 to avoid the bottom surface 18 being flush with the first surface 131. The sum of the distance D0 between the first supporting surface 11 and the first surface 131 and the thickness H1 of the first adhesive 160 is equal to the thickness H2 of the second adhesive 170. That is, H2=D0+H1. At this time, the first adhesive 160 and the second adhesive 170 are flush with the surface of the display screen 1200, and the distance between the portion of the first supporting surface 11 where the first adhesive 160 is not set and the display screen 1200 is 0.03mm. That is, the maximum gap between the display screen 1200 and the first supporting surface 11 is 0.03mm, which can enhance the user's touch and make the display screen 1200 better supported.

[0071] The display screen 1200 is bonded to the first surface 131 by the second adhesive 170. If the first supporting surface 11 is flush with the first surface 131, or the first supporting surface 11 is lower than the first surface 131, a large gap will be formed between the display screen 1200 and the first supporting surface 11, and the gap will cause the display screen 1200 to be suspended, affecting the flatness of the display screen 1200, and when the user presses the display screen 1200, a sense of emptiness will appear. In this embodiment, by setting the first supporting surface 11 to be raised relative to the first surface 131, the gap between the first supporting surface 11 and the display screen 1200 is reduced or even eliminated, so that the first supporting surface 11 can better support the display screen 1200, prevent the user from having a sense of emptiness when pressing the display screen 1200, and improve the tactile feeling of the user when pressing the display screen 1200.

[0072] In addition, the second adhesive 170 almost covers the entire first surface 131. If the first support surface 11 is not provided with the avoidance groove 16, and only the first support surface 11 is provided to be raised relative to the first surface 131, a sharp angle will be formed between the first support surface 11 and the support side surface 13. When the second adhesive 170 is activated by rolling, the display screen 1200 moves downward under the action of the rolling force and contacts the sharp angle. The sharp angle will damage the display screen 1200, and in severe cases, the display screen 1200 will leak or even fail completely. In addition, the step difference between the first support surface 11 and the first surface 131 will also cause the second adhesive 170 near the first support surface 11 to fail to activate, affecting the reliability of the display screen 1200. Failure to activate here means that the second adhesive 170 is not squeezed and activated by the rolling force.

[0073] In this embodiment, an avoidance groove 16 is provided on the first supporting surface 11, and the avoidance groove 16 is located between the second adhesive 170 and the first supporting surface 11, so as to remove the sharp corner between the first supporting surface 11 and the supporting side surface 13. Therefore, when the second adhesive 170 is activated by rolling, the sharp corner between the first supporting surface 11 and the supporting side surface 13 can be prevented from damaging the display screen 1200, and the step difference between the first supporting surface 11 and the first surface 131 can be prevented from affecting the activation of the second adhesive 170.

[0074] In addition, by providing the first step groove 36 , the portion of the second adhesive 170 close to the support plate 10 can be better stressed, so that the second adhesive 170 is fully activated, thereby improving the bonding reliability of the display screen 1200 .

[0075] In addition, the first support surface 11 and the avoidance side surface 17 have a smooth transition, which can prevent a sharp angle from appearing between the first support surface 11 and the avoidance side surface 17. The avoidance bottom surface 18 and the first connection surface 34 have a smooth transition, which can prevent a sharp angle from appearing between the avoidance bottom surface 18 and the first connection surface 34. The first connection surface 34 and the third connection surface 37 have a smooth transition, which can prevent a sharp angle from appearing between the first connection surface 34 and the third connection surface 37. This prevents the display screen 1200 from being damaged by the sharp corners.

[0076] In some embodiments, reference Fig.13 , Fig.13 yes Figure 4 1 is a structural schematic diagram of another perspective of the support plate 10 of the middle frame 110. The first support surface 11 includes a first edge 19, a second edge 20, a third edge 21, a fourth edge 22, a first corner 23, a second corner 24, a third corner 25 and a fourth corner 26.

[0077] The first support surface 11 is rectangular, and the first edge 19 and the fourth edge 22 are opposite to each other along the width direction of the support plate 10. The second edge 20 and the third edge 21 are opposite to each other along the length direction of the support plate 10. The first corner 23 is connected between the first edge 19 and the second edge 20, the second corner 24 is connected between the first edge 19 and the third edge 21, the third corner 25 is connected between the second edge 20 and the fourth edge 22, and the fourth corner 26 is connected between the third edge 21 and the fourth edge 22.

[0078] When the support plate 10 is connected to the middle plate 130, the first edge 19, the first corner 23 and the second corner 24 are located on the side of the support plate 10 away from the carrier 140, and the fourth edge 22, the third corner 25 and the fourth corner 26 are located on the side of the support plate 10 close to the carrier 140. The first edge 19, the second edge 20 and the third edge 21 are all surrounded by the first surface 131. The fourth edge 22 is located at the opening of the middle plate 130.

[0079] refer to Fig.13 The avoidance groove 16 includes a first avoidance groove 27, a second avoidance groove 28, a third avoidance groove 29, a fourth avoidance groove 30 and a fifth avoidance groove 31. The first avoidance groove 27 is arranged at the first edge 19, and the first avoidance groove 27 is located between the first bonding section 171 and the first support surface 11. The second avoidance groove 28 is arranged at the second edge 20, and the second avoidance groove 28 is located between the second bonding section 172 and the first support surface 11. The third avoidance groove 29 is arranged at the third edge 21, and the third avoidance groove 29 is located between the third bonding section 173 and the first support surface 11. The fourth avoidance groove 30 is arranged at the third corner 25, and the fifth avoidance groove 31 is arranged at the fourth corner 26. The second avoidance groove 28 is connected to the fourth avoidance groove 30, and the third avoidance groove 29 is connected to the fifth avoidance groove 31.

[0080] It can be seen that the first corner 23 and the second corner 24 are not provided with the avoidance groove 16, that is, the avoidance groove 16 is staggered with the first corner 23, and the avoidance groove 16 is staggered with the second corner 24. In this way, the structural strength of the first corner 23 and the second corner 24 can be ensured, and when the electronic device 1000 falls and the corner position of the housing 100 is a force point, the first corner 23 and the second corner 24 can be prevented from being deformed and squeezing the display screen 1200, thereby increasing the reliability of the display screen 1200.

[0081] The first avoidance groove 27 is provided at the first edge 19 to avoid a sharp angle between the first edge 19 and the supporting side surface 13, thereby avoiding damage to the display screen 1200, and preventing the step difference between the first edge 19 and the first surface 131 from affecting the activation of the first bonding section 171. The second avoidance groove 28 is provided at the second edge 20 to avoid a sharp angle between the second edge 20 and the first surface 131, thereby avoiding damage to the display screen 1200, and preventing the step difference between the second edge 20 and the first surface 131 from affecting the activation of the second bonding section 172. The third avoidance groove 29 is provided at the third edge 21 to avoid a sharp angle between the third edge 21 and the first surface 131, thereby avoiding damage to the display screen 1200, and preventing the step difference between the third edge 21 and the first surface 131 from affecting the activation of the third bonding section 173. The reliability of the display screen 1200 is improved.

[0082] Because the fourth edge 22, the third corner 25 and the fourth corner 26 are located on the side of the support plate 10 close to the carrier 140. The first adhesive 160 is arranged on the fourth edge 22, and there is a first spacing A1 between the first adhesive 160 and the fourth avoidance groove 30, and there is a second spacing A2 between the first adhesive 160 and the fifth avoidance groove 31. By setting the fourth avoidance groove 30 at the third corner 25 and the fifth avoidance groove 31 at the fourth corner 26. Then, when the first adhesive 160 is activated by rolling, the display screen 1200 can be prevented from moving downward to press the support plate 10, thereby preventing the support plate 10 from deforming, and preventing the deformed support plate 10 from pressing the display screen 1200. In addition, the fourth avoidance groove 30 can also prevent the generation of a sharp angle between the third corner 25 and the supporting side surface 13, and prevent the discontinuity between the third corner 25 and the first surface 131 from affecting the activation of the first bonding section 171. The fifth avoidance groove 31 can also avoid a sharp angle between the fourth corner 26 and the supporting side surface 13 , and prevent the step difference between the fourth corner 26 and the first surface 131 from affecting the activation of the third bonding section 173 .

[0083] In some embodiments, reference Fig.13 The first avoidance groove 27 includes a first sub-groove 32 and a second sub-groove 33, and the first sub-groove 32 and the second sub-groove 33 are spaced apart along the length direction of the support plate 10. Thus, the processing yield of the support plate 10 can be further improved.

[0084] In some embodiments, reference Fig.13 , the length L1 of the first avoidance groove 27 is less than the length S1 of the first edge 19, and the length of the first avoidance groove 27 is the sum of the length L11 of the first sub-groove 32 and the length L12 of the second sub-groove 33. There is a gap between the first avoidance groove 27 and the first corner 23, and there is a gap between the first avoidance groove 27 and the second corner 24. The length L2 of the second avoidance groove 28 is less than the length S2 of the second edge 20, and there is a gap between the second avoidance groove 28 and the first corner 23, that is, the second avoidance groove 28 is located on the side of the first edge 19 away from the first corner 23. The length L3 of the third avoidance groove 29 is less than the length S3 of the third edge 21, and there is a gap between the third avoidance groove 29 and the second corner 24, that is, the third avoidance groove 29 is located on the side of the third edge 21 away from the second corner 24. In this way, the support plate 10 can have sufficient structural strength to prevent the support plate 10 from deforming and squeezing the display screen 1200. It can also prevent the sharp corners of the support plate 10 from damaging the display screen 1200, and prevent the second adhesive 170 from being inactivated. On the other hand, when processing the support plate 10, the thicker original plate is first pressed to make the original plate become a thinner intermediate plate, and then the edge of the intermediate plate is pressed to form the support plate 10. That is, the processing of the avoidance groove 16 is the second process. It can be understood by those skilled in the art that the longer the length of the avoidance groove 16, the lower the yield of the support plate 10, and conversely, the shorter the length of the avoidance groove 16, the higher the yield of the support plate 10. Therefore, the length of the first avoidance groove 27, the second avoidance groove 28 and the third avoidance groove 29 is shortened, which can also improve the processing yield of the support plate 10.

[0085] Specifically, the length L1 of the first avoidance groove 27 and the length S1 of the first edge 19 satisfy the following condition: S1>L1≥0.5S1. The length L2 of the second avoidance groove 28 and the length S2 of the second edge 20 satisfy the following condition: S2>L2≥0.5S2. The length L3 of the third avoidance groove 29 is less than the length S3 of the third edge 21 and satisfies the following condition: L3≤0.5S3. When the above conditions are met, the structural strength of the support plate 10 and the degree of activation of the second adhesive 170 are good, and the damage to the display screen 1200 is small. In addition, the processing yield of the support plate 10 can also be improved.

[0086] refer to Fig.14 , Fig.141 is a partial structural diagram of an electronic device 1000 provided in another embodiment of the present application. Another embodiment of the present application provides an electronic device 1000, taking the electronic device 1000 as a candy-bar mobile phone as an example, the electronic device 1000 includes a housing 100 and a display screen 1200, the housing 100 includes a middle frame 110 and a back plate, the back plate and the display screen 1200 are respectively arranged on two opposite sides of the middle frame 110 along the thickness direction thereof, the middle frame 110 is provided with a battery accommodating compartment, the battery accommodating compartment is used to install the battery, and the back plate can close the battery accommodating compartment.

[0087] The middle frame 110 includes a frame 120, a middle plate 130 and a support plate 10. The support plate 10 is the same as the above embodiment and will not be described again. The difference from the above embodiment is that the frame 120 is in the shape of a rectangular frame, the middle plate 130 is in the shape of a rectangular plate, and the middle plate 130 is provided with a mounting hole 133. The frame 120 is arranged around the outer periphery of the middle plate 130, and the support plate 10 is fixed in the mounting hole 133. Fig.14 The middle mounting hole 133 is merely exemplary.

[0088] The first support surface 11 of the support plate 10 includes a first edge 19, a second edge 20, a third edge 21, a fourth edge 22, a first corner 23, a second corner 24, a third corner 25 and a fourth corner 26. The difference from the above embodiment is that the first corner 23, the second corner 24, the third corner 25 and the fourth corner 26 are all staggered with the avoidance groove 16 to enhance the structural strength of the four corners of the support plate 10 to prevent the support plate 10 from deforming and squeezing the display screen 1200 when the electronic device 1000 falls and the corner position of the housing 100 is the force point.

[0089] Of course, one, two or three of the first corner 23, the second corner 24, the third corner 25 and the fourth corner 26 may be arranged to be staggered with the avoidance groove 16. This application does not make any limitation.

[0090] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A middle frame, characterized in that: include: A middle plate and a support plate, wherein the middle plate is provided with a mounting hole, and the mounting hole penetrates the middle plate along the thickness direction of the middle plate; the middle plate comprises a first surface, and the first surface is arranged around the mounting hole; The support plate comprises a main body, the main body comprises a first support surface, a second support surface and a support side surface, and along the thickness direction of the support plate, the first support surface and the second support surface are opposite to each other; The supporting side surface is connected between the first supporting surface and the second supporting surface; an avoidance groove is concavely provided at the edge of the first supporting surface, and the avoidance groove runs through the supporting side surface; The support plate is connected to the middle plate, the second support surface covers the mounting hole, and the first support surface and the first surface are oriented in the same direction; along the thickness direction of the middle frame, the first support surface is raised relative to the first surface; The avoidance groove is located between the first surface and the first supporting surface.

2. The middle frame according to claim 1, characterized in that: The first supporting surface is rectangular, and the avoidance groove is staggered with at least one corner of the first supporting surface.

3. The middle frame according to claim 2, characterized in that: The first supporting surface includes a first corner and a second corner, and the first corner and the second corner are opposite to each other along the length direction of the supporting plate; the avoidance groove is staggered with the first corner, and the avoidance groove is staggered with the second corner.

4. The middle frame according to claim 3, characterized in that: The first support surface further includes a first edge, a second edge and a third edge; the first edge is connected between the first corner and the second corner; the third edge of the second edge is spaced opposite to each other along the length direction of the support plate, one end of the second edge is connected to the first corner, and one end of the third edge is connected to the second corner; The avoidance groove includes a first avoidance groove, a second avoidance groove and a third avoidance groove, wherein the first avoidance groove is arranged at the first edge, the second avoidance groove is arranged at the second edge, and the third avoidance groove is arranged at the third edge.

5. The middle frame according to claim 4, characterized in that: The length of the first avoidance groove is shorter than the length of the first edge, the length of the second avoidance groove is shorter than the length of the second edge, and the length of the third avoidance groove is shorter than the length of the third edge.

6. The middle frame according to claim 5, characterized in that: The length L1 of the first avoidance groove and the length S1 of the first edge satisfy the following condition: S1>L1≥0.5S1; The length L2 of the second avoidance groove and the length S2 of the second edge satisfy the following condition: S2>L2≥0.5S2; The length L3 of the third avoidance groove is less than the length S3 of the third edge and satisfies the following condition: L3≤0.5S3.

7. The middle frame according to claim 4, characterized in that: The first avoidance groove includes a first sub-groove and a second sub-groove, and the first sub-groove and the second sub-groove are spaced apart along the length direction of the support plate.

8. The middle frame according to claim 4, characterized in that: The first supporting surface further includes a third corner and a fourth corner, the third corner connecting an end of the second edge away from the first corner, and the fourth corner connecting an end of the third edge away from the second corner; The avoidance groove further includes a fourth avoidance groove and a fifth avoidance groove, wherein the fourth avoidance groove is arranged at the third corner, and the fifth avoidance groove is arranged at the fourth corner.

9. The middle frame according to claim 8, characterized in that: The first supporting surface also includes a fourth edge, which is connected between the third corner and the fourth corner; the fourth edge is used to set the first adhesive; along the length direction of the supporting plate, there is a first distance between the first adhesive and the fourth avoidance groove, and there is a second distance between the first adhesive and the fifth avoidance groove.

10. The middle frame according to any one of claims 1 to 9, characterized in that: The avoidance groove includes an avoidance side surface and an avoidance bottom surface, the avoidance bottom surface is parallel to the first supporting surface, the avoidance side surface is connected between the first supporting surface and the avoidance bottom surface; the avoidance side surface and the first supporting surface have a smooth transition.

11. The middle frame according to any one of claims 1 to 9, characterized in that: The avoidance groove includes an avoidance bottom surface, and the support plate also includes a connecting portion, which is connected to the supporting side surface; the connecting portion includes a first connecting surface, and the avoidance bottom surface, the first connecting surface, and the first supporting surface are all oriented in the same direction; the first connecting surface is sunken relative to the avoidance bottom surface to form a first step groove; the first step groove is located between the avoidance groove and the first surface.

12. The middle frame according to claim 11, characterized in that: There is a smooth transition between the avoidance bottom surface and the first connecting surface.

13. The middle frame according to claim 11, characterized in that: The connecting portion further includes a second connecting surface, which is opposite to the first connecting surface along the thickness direction of the support plate; a connecting groove is concavely provided on the first surface, and a convex portion is provided in the connecting groove; the second connecting surface is stacked on the convex portion, and the second connecting surface covers the connecting groove; The connection groove is used to set a third adhesive, and the third adhesive is bonded to the second connection surface.

14. The middle frame according to claim 11, characterized in that: The connecting portion is provided with a connecting ear, and the connecting ear includes a third connecting surface, the third connecting surface and the first connecting surface are oriented in the same direction, and the third connecting surface is sunken relative to the first connecting surface to form a second step groove; The middle frame further includes a fastener, the connecting ear and the middle plate are connected by the fastener, and a part of the fastener is located in the second step groove.

15. The middle frame according to claim 14, characterized in that: There is a smooth transition between the third connecting surface and the first connecting surface.

16. An electronic device, characterized in that: It comprises a display screen and a middle frame according to any one of claims 1 to 15; the display screen is stacked on the first surface and the first supporting surface.

17. The electronic device according to claim 16, characterized in that: The display screen is bonded to the first supporting surface by a first adhesive, and the display screen is bonded to the first surface by a second adhesive; The thickness of the first adhesive is smaller than the thickness of the second adhesive.

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