CN117675981A - Structural assembly and folding terminal - Google Patents

Abstract

The embodiment of the application provides a structural component and a folding terminal, which can reduce the thickness of the folding terminal. The structural component comprises at least two machine bodies and a rotating shaft structure for connecting the adjacent two machine bodies; the machine body comprises a middle frame and a shell, wherein the middle frame comprises a supporting piece; the shell is arranged on the supporting piece; the rotating shaft structure comprises a shaft cover and a swing arm; the swing arm comprises a rotating part and a connecting part; the rotating part is connected with the shaft cover, the connecting part is connected with the supporting piece, and the swing arm is configured to rotate around the axis of the rotating shaft structure so as to enable the two machine bodies to fold or unfold around the axis; at least one support piece of the machine body is provided with a hollowed-out part; when the two machine bodies are in an unfolding state, the hollowed-out part at least exposes the highest part of the shaft cover, and the highest part of the shaft cover is the part closest to the shell in the overlapped part of the shaft cover and the shell; and/or when the two machine bodies are in a folded state, the hollowed-out part at least exposes the highest part of the rotating part, and the highest part of the swing arm is the part closest to the shell in the overlapped part of the swing arm and the shell.

Description

Structural assembly and folding terminal

Technical Field

The application relates to the technical field of display, in particular to a structural component and a folding terminal.

Background

With the continuous development of display technology, a folder type terminal (such as a folder type mobile phone) gradually becomes a development trend of future mobile electronic products. Under the unfolding state, the folding terminal can obtain a larger display area, and the visual effect is improved. The folding terminal can obtain smaller volume under the folding state, and is convenient for users to carry. As a result, folder terminals are increasingly favored by more and more users. However, the current folder type terminal has a problem of a thicker thickness.

Disclosure of Invention

In order to solve the technical problem, the application provides a structural component and a folding terminal, which can reduce the thickness of the folding terminal.

In a first aspect, embodiments of the present application provide a structural assembly comprising: at least two airframes and a rotating shaft structure connecting the adjacent airframes; the machine body comprises a middle frame and a shell, wherein the middle frame comprises a supporting piece; the support piece comprises a first surface and a second surface which are opposite, and the shell is arranged on the first surface; the rotating shaft structure comprises a shaft cover and a swing arm, and the shaft cover and the swing arm are positioned on one side of the second surface, which is away from the first surface; the swing arm comprises a rotating part and a connecting part; the rotating part of the swing arm is connected with the shaft cover, the connecting part of the swing arm is connected with the supporting piece, and the swing arm is configured to rotate around the axis of the rotating shaft structure so as to enable the two machine bodies to be folded or unfolded around the axis; wherein, the support piece of at least one fuselage is provided with a hollowed-out part; when the two machine bodies are in an unfolding state, the hollowed-out part at least exposes the highest part of the shaft cover, wherein the highest part of the shaft cover is the part closest to the shell in the overlapped part of the shaft cover and the shell along the direction perpendicular to the first direction; and/or when the two machine bodies are in a folded state, the hollowed-out part at least exposes the highest part of the rotating part, and the highest part of the rotating part is the part closest to the shell in the part overlapped with the shell along the direction perpendicular to the first direction; the first direction is a direction perpendicular to the housing.

Through carrying out the hole design in support piece's minimum wall thickness position department, like this, support piece minimum wall thickness position department becomes zero by minimum wall thickness, has avoided folding cell-phone when being in different states, because all need remain support piece's minimum wall thickness and lead to folding cell-phone's thickness thicker problem, has realized folding cell-phone thickness reduction's effect when folding state and expansion state. The folding terminal can be correspondingly thinned by 0.2-0.3mm through verification.

For example, the position of minimum wall thickness of the support member may be a position in the support member corresponding to a highest portion of the shaft cover in the unfolded state, wherein the highest portion of the shaft cover is a portion closest to the housing among portions of the shaft cover overlapping the housing. That is, in the unfolded state, the support member is recessed downward because the housing is provided, and because the shaft cover is provided and has a portion of high height, the support member is thinned upward at this position so as not to affect the shaft cover, and the support member is recessed downward and thinned upward so that the support member has a minimum wall thickness.

For example, the position of the minimum wall thickness of the support member may be a position in the support member corresponding to a highest portion of the rotation portion, which is a portion closest to the housing among portions where the swing arm overlaps the housing, in the folded state. That is, in the folded state, since the housing is provided, the supporting member is recessed downward, and since the rotating portion is provided, and the rotating portion has a portion having a high height, the supporting member is thinned upward at this position so as not to affect the swing arm, and the supporting member is recessed downward and thinned upward so that the supporting member has a minimum wall thickness.

For example, the position of the minimum wall thickness of the support member may be a position in the support member corresponding to the highest portion of the shaft cover (in the unfolded state) and the highest portion of the rotating portion (in the folded state). That is, in the unfolded state, the highest portion of the shaft cover and in the folded state, the highest portion of the rotating portion simultaneously makes the support member have the minimum wall thickness.

The housing may be a battery cover (also referred to as a rear cover) or a display screen (also referred to as an external screen), for example.

The number of the hollowed-out parts can be one or a plurality of, and when the number of the hollowed-out parts is a plurality of, a support piece which is not hollowed-out is arranged between two adjacent hollowed-out parts. For example, when the two bodies are in the unfolded state, the hollowed-out portions expose at least the highest portion of the shaft cover, and since the shaft cover extends in the axial direction, the number of hollowed-out portions may be one, and the hollowed-out portions extend in the axial direction to expose the highest portion of the shaft cover. For example, when the two frames are in a folded state, the hollow portions at least expose the highest portion of the rotating portions, and the number of the rotating portions along the axis direction may be plural, so that the hollow portions may be disposed at positions corresponding to the highest portion of each rotating portion, that is, the number of the hollow portions is plural at this time.

In some possible implementations, the housing of the at least one body includes a display screen, and a cover plate fixedly connected with the display screen is disposed on a side of the display screen facing away from the middle frame; the support piece comprises a step part and a support part along a second direction; the supporting part is provided with a hollowed-out part; the cover plate is fixed on the step part so that the display screen is positioned on the supporting part; the second direction is a direction perpendicular to the first direction and perpendicular to the axial direction; along a second direction, the hollowed-out part comprises a first end face and a second end face, and the second end face is positioned at one side of the first end face away from the axis; the structural assembly further comprises a first sealing structure and a second sealing structure, wherein the first sealing structure is filled in a first gap formed between the first end face, the display screen and the cover plate, and the second sealing structure is filled in a second gap formed between the first surface and the display screen.

The arrangement is that the gaps at the corresponding positions of the hollowed-out parts are sealed through the first sealing structure and the second sealing structure, so that the problem that dust and/or liquid enter the machine body through the hollowed-out parts to cause the failure of the folding terminal is avoided.

The display screen is illustratively a second display unit in the embodiments described below.

Illustratively, when the housing includes a rear cover, the rear cover is secured to the step portion by a backing adhesive such that the backing adhesive is located on the support portion.

In some possible implementations, on the basis that the structural assembly further includes a first sealing structure and a second sealing structure, the first sealing structure and the second sealing structure each include one of a soft gel, a jelly gel, a sealant, and the like. Because the first sealing structure and the second sealing structure are softer, when the sealing structure is in contact with other structures, the other structures are prevented from being extruded, for example, when the sealing structure is in contact with the display screen, the display effect of the display screen is influenced by the extrusion of the display screen, and when the sealing structure is arranged, the process steps are simpler. In addition, the soft rubber, the jelly rubber, the sealant and the like are all arranged through a dispensing process, and then the first sealing structure and the second sealing structure are formed through pressing, so that when the first sealing structure and the second sealing structure comprise one of the soft rubber, the jelly rubber, the sealant and the like, the sealing effect can be ensured.

In some possible implementations, on the basis that the structural assembly further includes a first sealing structure and a second sealing structure, the first sealing structure includes one of soft gum, jelly and sealing gum; the second sealing structure comprises a back adhesive. Because the first sealing structure and the second sealing structure are softer, when the sealing structure is in contact with other structures, the other structures are prevented from being extruded, for example, when the sealing structure is in contact with the display screen, the display effect of the display screen is influenced by the extrusion of the display screen, and when the sealing structure is arranged, the process steps are simpler. In addition, the soft rubber, the jelly glue, the sealing glue and the like are all arranged through a glue dispensing process, and then the first sealing structure is formed through pressing, so that when the first sealing structure comprises one of the soft rubber, the jelly glue, the sealing glue and the like, the sealing effect of a first gap formed between the first end face, the display screen and the cover plate can be ensured, the back glue is arranged through the attaching device, the process is simple, the attaching precision between the display screen and the supporting piece can be ensured, and the sealing effect of a second gap formed between the first surface and the display screen is further ensured.

In some possible implementations, on the basis that the above structural assembly further includes a first sealing structure and a second sealing structure, in the third direction, the shaft cover includes a middle portion and edge portions located on both sides of the middle portion, the edge portions including a first edge and a second edge, the first edge being an edge that contacts the middle portion, the second edge being located on a side of the first edge facing away from the middle portion; the first edge points to the second edge, and the height of the edge part gradually decreases; the support piece is provided with a bulge part matched with the edge part at the position corresponding to the edge part, and the first sealing structure and the second sealing structure extend to the bulge part so as to be in contact with the bulge part; wherein the third direction is parallel to the axis.

That is, along the axis direction, the edge position height of the shaft cover is lowered, and correspondingly, the position of the support piece corresponding to the lowered position of the shaft cover is raised, so that dust and/or liquid can be prevented from entering the machine body through the gap between the shaft cover and the support piece, the problem that the folding terminal fails is solved, and the sealing effect is better.

In some possible implementations, the structural component further includes a protective layer, where the protective layer is used to cover the hollowed-out portion. When the structure (protective layer) different from the support piece is arranged on the hollowed-out part, the structure with the minimum wall thickness than the support piece can be selected, so that the thickness of the whole machine can be reduced, the sealing effect can be realized, and the strength of the middle frame can be ensured.

In some possible implementations, on the basis that the structural component further includes a protective layer, the thickness of the protective layer is greater than or equal to 0.05mm and less than or equal to 0.1mm along the first direction, and the thickness of the protective layer is smaller than the minimum wall thickness of the support member (after the protective layer is smaller than the minimum wall thickness, the support member cannot be reliably formed), where the minimum wall thickness of the support member may be, for example, 0.3mm, so that the effect of reducing the thickness of the folding terminal in both the folded state and the unfolded state can be ensured, and the strength of the middle frame can be ensured.

The thickness of the protective layer may be, for example, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, or the like.

In some possible implementations, on the basis that the structural component further includes a protective layer, the material of the protective layer includes steel, mylar, plastic, or the like, through which the thickness of the protective layer can be made smaller than the minimum wall thickness of the support member, so as to ensure the effect of reducing the thickness of the folding terminal in both the folded state and the unfolded state.

In some possible implementations, on the basis that the structural component further includes a protective layer, the protective layer includes a first section, a second section, and a third section that are sequentially connected; the first subsection is fixedly connected with the first end face, for example, the first subsection is fixedly connected with the first end face through welding or bonding, the third subsection is fixedly connected with the second end face, for example, the third subsection is fixedly connected with the second end face through welding or bonding, and the second subsection is used for covering the hollowed-out portion so as to prevent dust and/or liquid from entering the machine body through the hollowed-out portion.

In some possible implementations, on the basis that the structural component further includes a protective layer, the protective layer includes a first section, a second section, and a third section that are sequentially connected; the third subsection comprises a first sub-part connected with the second subsection and a second sub-part connected with the first sub-part; the first subsection is fixed on the first surface connected with the first end face, the first subsection is fixed on the first surface in a welding or bonding mode, the second subsection is opposite to the first end face, the first subsection is used for covering the hollowed-out part, the second subsection is fixed on the first surface connected with the second end face, the second subsection is fixed on the first surface in a welding or bonding mode, namely, the projection of the protection layer on a plane perpendicular to the axis direction is Z-shaped, the structure is simple, and dust and/or liquid can be prevented from entering the machine body through the hollowed-out part.

In some possible implementations, the protective layer includes a first section, a second section, and a third section that are sequentially connected, where the first section is parallel to the third section, and the second section is perpendicular to the first section and the third section. By the arrangement, the gap between the display screen and the first end face is smaller, and the comprehensive screen effect of the outer screen is not facilitated when the gap between the display screen and the first end face is larger.

In some possible implementations, along the second direction, the hollowed-out portion includes a first end face and a second end face; the second end surface is positioned on one side of the first end surface, which is away from the axis; the distance from the first end face to the axis is greater than or equal to 1.5mm, the distance from the second end face to the axis is less than or equal to 10mm, and when the distance from the first end face to the axis is too small, and the distance from the second end face to the axis is too large, namely the width of the hollowed-out part is wider, the strength of the middle frame is affected; when the distance from the first end face to the axis is too large, and the distance from the second end face to the axis is too small, the rotation of the rotating shaft structure is affected.

In some possible implementations, the cross-sectional shape of the hollowed-out portion at the reference plane includes a rectangle or a rounded rectangle, etc., wherein the reference plane is perpendicular to the first direction.

In a second aspect, an embodiment of the present application provides a folding terminal, where the folding terminal includes a flexible screen and a structural component according to the first aspect, and may achieve all the beneficial effects of the first aspect, where the structural component is used to support the flexible screen, and after the folding terminal is folded, the flexible screen is hidden inside two fuselages, so that the flexible screen is hidden in a folded state of the folding terminal, so as to protect the flexible screen, and the flexible screen is presented in an unfolded state of the folding terminal, without affecting the effect of display.

Drawings

Fig. 1 is a schematic structural diagram of a folding terminal according to an embodiment of the present application;

fig. 2 is a side view of a folder-type terminal according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a folding terminal according to an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along the direction BB' of FIG. 3;

fig. 5 is a schematic structural diagram of a folding terminal according to an embodiment of the present application;

FIG. 6 is a cross-sectional view taken along the direction CC' of FIG. 5;

FIG. 7 is a further cross-sectional view taken along the direction BB' of FIG. 3;

fig. 8 is an exploded view of a folder type terminal according to an embodiment of the present application;

FIG. 9 is an enlarged view of a portion of the MM area in FIG. 8;

FIG. 10 is a schematic structural view of a shaft cover according to an embodiment of the present disclosure;

FIG. 11 is a further cross-sectional view taken along the direction CC' of FIG. 5;

FIG. 12 is a diagram of the positional relationship of a support, swing arm and shaft cover provided in an embodiment of the present application;

FIG. 13 is a diagram of the positional relationship of a support, swing arm and shaft cover according to an embodiment of the present application;

FIG. 14 is a cross-sectional view taken along the direction FF' of FIG. 3;

FIG. 15 is a further cross-sectional view taken along the direction FF' of FIG. 3;

FIG. 16 is an exploded view of a second support and protective layer provided in an embodiment of the present application;

FIG. 17 is a further cross-sectional view taken along line FF' of FIG. 3;

FIG. 18 is a further cross-sectional view taken along line FF' of FIG. 3;

FIG. 19 is a schematic view of a second support and shaft cover according to an embodiment of the present disclosure;

fig. 20 is a cross-sectional view of fig. 3 along the direction GG'.

Reference numerals:

10-a first display unit;

20-a first fuselage; 21-a first housing; 22-a first middle frame; 221-a first support;

30-a second fuselage; 31-a second housing; 32-a second middle frame; 311-cover plate; 321-a second support; 321 a-a first surface; 321 b-a second surface; 321 c-a step; 321 d-a support; 321 e-a boss; 322-hollowed-out parts; 322 a-a first end face; 322 b-a second end face;

40-a rotating shaft structure; 41-shaft cover; 42-a first swing arm; 43-a second swing arm; 44-swing arm chute; 411-straight portion; 412-a bend; 413-middle part; 414-edge portion; 431-a rotating part; 432-a connection;

50-a first sealing structure;

60-a second sealing structure;

70-a protective layer; 71-a first subsection; 72-a second subsection; 73-third subsection; 731-a first subsection; 732-a second sub-section;

100-folder type terminal.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The terms first and second and the like in the description and in the claims of embodiments of the present application are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first target object and the second target object, etc., are used to distinguish between different target objects, and are not used to describe a particular order of target objects.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, the plurality of processing units refers to two or more processing units; the plurality of systems means two or more systems.

The embodiment of the application provides a folding terminal, which can be a mobile phone, a tablet personal computer, a personal digital assistant (personal digital assistant, PDA for short), a vehicle-mounted computer, a television, intelligent wearable equipment, intelligent household equipment and the like, and the specific form of the folding terminal is not particularly limited. For convenience of explanation, the folder type terminal will be described as a folder type mobile phone.

For the sake of clarity in describing the following structural features and the positional relationships of the structural features, the positional relationships of the structures in the folding cellular phone are specified in the X-axis direction, the Y-axis direction, and the Z-axis direction. The X-axis direction (also referred to as the second direction) is the width direction of the folded mobile phone after being unfolded, the Y-axis direction (also referred to as the third direction) is the length direction of the folded mobile phone after being unfolded, and the Z-axis direction (also referred to as the first direction) is the thickness direction of the folded mobile phone after being unfolded.

Referring to fig. 1, a folding cellular phone 100 includes a first display unit (also referred to as an inner screen or a flexible screen) 10.

The first display unit 10 is, for example, a display screen having flexibility. The first display unit 10 includes, for example, an organic light emitting diode (Organic Light Emitting Diode, OLED) display screen. The OLED display screen does not need a backlight module, and a substrate in the OLED display screen can be made of flexible resin materials, such as polyethylene terephthalate (Polyethylene terephthalate, PET), so that the OLED display screen has the characteristic of being bendable. Of course, the type of first display unit 10 includes, but is not limited to, an OLED display screen, as long as a bent display screen can be realized, which is within the scope of protection of the present application.

With continued reference to fig. 1, the folding handset 100 also includes structural components. The structural assembly includes a first body 20, a second body 30, and a rotating shaft structure 40 positioned between the first body 20 and the second body 30. The rotary shaft structure 40 is connected to the first body 20 and the second body 30, respectively. The first body 20, the rotary shaft structure 40, and the second body 30 may be used to carry the first display unit 10. The first body 20 and the second body 30 can rotate around the axis S0 of the rotating shaft structure 40, so as to realize the folding or unfolding state of the first display unit 10, that is, the folding or unfolding state of the folding mobile phone 100.

Fig. 1 shows a schematic diagram of a folding mobile phone after being unfolded. Fig. 2 shows a schematic diagram of a folding mobile phone when folded. In fig. 2, when the folding cellular phone 100 is folded, it can be folded toward the light emitting direction (indicated by an arrow in fig. 2) of the first display unit 10, that is, the direction in which the first and second bodies 20 and 30 rotate about the axis S0 is the same as the light emitting direction of the first display unit 10. When the folding mobile phone is folded, the first display unit 10 is hidden inside the first body 20 and the second body 30, so that the first display unit 10 is hidden when the folding mobile phone 100 is in a folded state, so as to protect the first display unit 10, and the first display unit is presented when the folding mobile phone 100 is in an unfolded state, so that the display effect is not affected.

It should be noted that the foldable mobile phone 100 may be folded at a plurality of positions, and accordingly, the structural components may include a plurality of hinge structures 40 and a plurality of bodies. For example, two hinge structures 40 and three bodies may be included, and two adjacent bodies are connected by one hinge structure 40, so that the folding mobile phone 100 has two folding positions. It can be seen that the structural assembly comprises at least one rotating shaft structure 40 and at least two fuselage, adjacent two fuselage being connected by one rotating shaft structure 40. For ease of description, the embodiments of the present application will be described with respect to structural assemblies including a rotating shaft structure 40 and two bodies (i.e., a first body 20 and a second body 30).

Referring to fig. 3 and 4, the first body 20 includes a first housing 21 and a first middle frame 22. The second body 30 includes a second housing 31 and a second middle frame 32.

In order to more clearly show the inventive points of the present invention, fig. 4 only shows the structures related to the inventive points, but not all the structures, and the following drawings are the same, and the following descriptions are omitted.

The first housing 21 may be a rear cover (also referred to as a battery cover) of the folding cellular phone 100; the display unit may be a display unit for display, and the embodiment of the present application is not limited thereto. The second housing 31 may be a rear cover (also referred to as a battery cover) of a folder-type mobile phone; the display unit may be a display unit for display, and the embodiment of the present application is not limited thereto. In this embodiment, the first housing 21 is taken as a rear cover, and the second housing 31 is taken as a display unit (also referred to as a second display unit or an external screen or a display screen, and the first display unit 10 is distinguished).

The second display unit 31 includes, for example, an organic light emitting diode (Organic Light Emitting Diode, OLED) display screen or the like. In some embodiments, a cover 311 or the like for protecting the second display unit 31 is provided on the second display unit 31.

The first middle frame 22 includes a first exterior member (a structure of the first middle frame 22 exposed to the outside, which is not shown in fig. 4) and a first support 221 between the first display unit 10 and the rear cover 21.

The second middle frame 32 includes a second exterior member (a structure of the second middle frame 32 exposed to the outside, which is not shown in fig. 4) and a second support 321 between the first display unit 10 and the second display unit 31.

The first display unit 10, the rear cover 21, the first exterior, the second display unit 31, and the second exterior enclose the accommodation space. The housing chamber is provided therein with a printed circuit board, a flexible circuit board, a functional device, a battery, and the like (not shown in fig. 4). The functional devices include, for example, a display driving module, a camera, and the like. The structure within the accommodating chamber is supported by the first support 221 of the first middle frame 22 and the second support 321 of the second middle frame 32. The rear cover 21 may be fixed to the first support 221 by a rear cover adhesive 211 to support the rear cover 21 by the first support, and the second display unit 31 may be fixed to the second support 321 by an adhesive (not shown) to support the second display unit 31 by the second support 321.

It should be noted that, the related drawings of the first support 221 and the second support 321 in the embodiments of the present application are simplified schematic structural diagrams, and the first support 221 and the second support 321 are not limited to the structures in the drawings, and the first support 221 and the second support 321 may be adaptively adjusted according to the positions of the structures disposed in the accommodating cavity.

With continued reference to fig. 4, the pivot structure 40 may include, for example, a shaft cover 41, a first swing arm 42, a second swing arm 43, and a swing arm chute 44. One end of the first swing arm 42 is rotatably connected to the shaft cover 41 through the swing arm sliding groove 44, the other end extends in the direction of the accommodating cavity formed by the first display unit 10, the rear cover 21 and the first appearance part, and is connected to the first supporting member 221, one end of the second swing arm 43 is rotatably connected to the shaft cover 41 through the swing arm sliding groove 44, and the other end extends in the direction of the accommodating cavity formed by the first display unit 10, the second display unit 31 and the second appearance part, and is connected to the second supporting member 321, so that, in combination with fig. 5 and 6, when a user applies a force to the first body 20 and/or the second body 30, the first body 20 and/or the second body 30 can be folded (as shown in fig. 6) or unfolded (as shown in fig. 4) relative to the shaft cover 41 under the force of the user, that is, i.e., the first swing arm 42 and the second swing arm 43 can rotate about the axis S0 of the rotating shaft structure 40, so that the two bodies can be folded or unfolded about the axis S0 of the axis S0, and further the folded (as shown in fig. 4) or unfolded state of the mobile phone 100 is realized.

It should be noted that, the related drawings of the rotating shaft structure 40 in the embodiment of the present application are simplified schematic structural diagrams, and the folding mechanism 40 is not limited to the structures in the drawings, but may also include other structures, which are not described herein.

With continued reference to fig. 4, in order to pursue the full screen effect of the outer screen of the folder, etc., the outer screen 31 and the rear cover 21 are generally extended above the shaft cover 41, that is, in the Z-axis direction, the outer screen 31 overlaps the shaft cover 41, the rear cover 21 overlaps the shaft cover 41, that is, the front projection of the outer screen 31 on the XY plane overlaps the front projection of the shaft cover 41 on the XY plane, and the front projection of the rear cover 21 on the XY plane overlaps the front projection of the shaft cover 41 on the XY plane.

It has been found that when the outer screen 31 and the rear cover 21 are extended above the shaft cover, with continued reference to fig. 4, in the first body 20, the thickness of the first body 20 of the folding mobile phone 100 in the unfolded state is thicker due to factors such as the escape gap of the shaft cover 41 and the first support 221, the minimum wall thickness of the first support 221, and the thickness of the rear cover 21, and in the second body 30, the thickness of the second body 30 of the folding mobile phone 100 in the unfolded state is thicker due to factors such as the escape gap of the shaft cover 41 and the second support 321, the minimum wall thickness of the second support 321, the escape gap of the second display unit 31 and the second support 321, and the thickness of the screen second display unit 31. With continued reference to fig. 6, when the folding cellular phone 100 is in the folded state, in the first body 20, the thickness of the first body 20 of the folding cellular phone 100 is thicker in the folded state due to factors such as the design of the first swing arm 42, the escape gap of the first swing arm 42 and the first support 221, the minimum wall thickness of the first support 221, and the thickness of the rear cover 21, and in the second body 30, the thickness of the second body 30 of the folding cellular phone 100 is thicker in the folded state due to factors such as the design of the second swing arm 43, the escape gap of the second swing arm 43 and the second support 321, the minimum wall thickness of the second support 321, the escape gap of the second display unit 31 and the second support 321, and the thickness of the screen second display unit 31.

Based on the above findings, when the folding cellular phone 100 is in different states (unfolded state and folded state), the thickness of the folding cellular phone 100 is thicker due to the minimum wall thickness of the supporting members (the first supporting member 221 and the second supporting member 321) being maintained.

The minimum wall thickness of the support member will vary depending on the design of the spindle structure 40. In one case, the minimum wall thickness is caused by the fact that the shaft cover 41 in the unfolded state is avoided from being constrained, namely, in the unfolded state, in order to avoid the influence of the support on the shaft cover 41, a certain clearance is needed between the shaft cover 41 and the support, and further, the support at the corresponding position of the shaft cover 41 is subjected to thinning treatment so as to form the minimum wall thickness of the support; in another case, the minimum wall thickness is caused by the constraint of avoiding the swing arm in the folded state, that is, in order to avoid the influence of the support member on the swing arm in the folded state, a certain gap is required between the swing arm and the support member, and further, the support member at the corresponding position of the swing arm is thinned, so that the minimum wall thickness of the support member is formed. Of course, it is also possible that the cover avoidance constraint in the extended state and the swing arm avoidance constraint in the collapsed state result in a minimum wall thickness at the same time.

The minimum wall thickness is the minimum thickness that the support member can achieve, i.e., less than the minimum wall thickness, when the process conditions allow, and the support member cannot be reliably formed.

In order to achieve the light and thin folding mobile phone 100, the embodiment of the application further provides a structural component, which is designed by digging holes at the position of the minimum wall thickness of the supporting piece, so that the position of the minimum wall thickness of the supporting piece is changed from the minimum wall thickness to zero, the problem that the thickness of the folding mobile phone 100 is thicker due to the fact that the minimum wall thickness of the supporting piece is reserved when the folding mobile phone 100 is in different states is avoided, and the effect that the thickness of the folding mobile phone is reduced when the folding mobile phone is in a folded state and an unfolded state is achieved.

The following describes a specific structure of the structural component provided in the embodiment of the present application in connection with a folding mobile phone. The following description will be given by taking the design of hollowing the second support as an example. When the first support is hollowed out, the specific structure of the first support, the structure corresponding to the first support and the effect produced are the same as those of each example when the second support is hollowed out, and the specific structure when the first support is hollowed out is not repeated.

Referring to fig. 7, the second support 321 includes opposite first and second surfaces 321a and 321b, and the second display unit 31 is disposed on the first surface 321 a. The side of the second display unit 31 facing away from the second supporting member 321 is provided with a cover plate 311 fixedly connected with the second display unit 31, and the cover plate 311 can be fixed on the second display unit 31 by transparent optical cement (Optically Clear Adhesive, OCA), for example.

The second support 321 includes a step portion 321c and a support portion 321d in the X-axis direction. The cover 311 is fixed to the stepped portion 321c such that the display screen 31 is positioned on the supporting portion 321d. In some embodiments, for example, glue may be dispensed at the step 321c to fix the cover 311 to the step 321c.

The shaft cover 41 and the second swing arm 43 of the rotating shaft structure 40 are located on a side of the second surface 321b facing away from the first surface 321 a. The second swing arm 43 includes a rotation portion 431 and a connection portion 432; the rotating portion 431 of the second swing arm 43 is rotatably connected to the shaft cover 41 through the swing arm chute 44, and the connecting portion 432 of the second swing arm 43 is connected to the second support 321.

Referring to fig. 8 and 9, the supporting portion 321d is provided with a hollow portion 322.

When the minimum wall thickness is caused by the avoidance of constraint by the shaft cover 41 in the unfolded state, that is, when in the unfolded state, the second supporting member 321 is recessed downward because the second display unit 31 is provided, and because the shaft cover 41 is provided and the shaft cover 41 has a higher height portion, the second supporting member 321 is thinned upward at the position so as not to affect the shaft cover 41, and the second supporting member 321 is recessed downward and thinned upward so that the supporting member has the minimum wall thickness, therefore, the minimum wall thickness at the position can be hollowed out to form the hollowed-out portion 322. That is, the hollowed-out portion 322 may be formed to expose at least the highest portion of the shaft cover 41, which is the portion closest to the second display unit 31 among the portions of the shaft cover overlapping the second display unit 31 in the direction perpendicular to the Z-axis.

In some embodiments, in conjunction with fig. 10, the shaft cover 41 includes a flat portion 411 and bending portions 412 located at two sides of the flat portion 411 along the X-axis direction, an edge of the bending portion 412 contacting the flat portion 411 points to an edge of a side of the bending portion 412 away from the flat portion 411, and the height of the bending portion 412 gradually decreases, and the bending portion 412 may be a surface having an arc, for example. The highest portion of the shaft cover 41 is a portion where the flat portion 411 overlaps the second display unit 31 in the direction perpendicular to the Z-axis, as in the DD region in fig. 7. The hollowed-out portion 322 may expose at least a portion of the flat portion 411 overlapping the second display unit 31.

Referring to fig. 11, when the minimum wall thickness is caused by the swing arm avoidance constraint in the folded state, that is, in the folded state, the second support 321 is recessed downward because the second display unit 31 is provided, and because the rotating portion 431 of the swing arm is provided and the rotating portion 431 has a higher height, the second support 321 is thinned upward at this position so as not to affect the swing arm, and the second support 321 is recessed downward and thinned upward so that the support has the minimum wall thickness, and thus, the minimum wall thickness at this position can be hollowed out to form the hollowed-out portion 322. That is, the hollowed-out portion 322 may expose at least the highest portion of the rotating portion 431, where the highest portion of the rotating portion 431 is the portion closest to the second display unit 31 in the portion where the rotating portion 431 overlaps the second display unit 31 in the direction perpendicular to the Z axis, such as EE area in fig. 11.

When the minimum wall thickness is caused by both the avoidance constraint of the shaft cover 41 in the unfolded state and the avoidance constraint of the swing arm in the folded state, that is, when the second display unit 31 is provided, the second support 321 is recessed downward, and because the shaft cover 41 is provided and the shaft cover 41 has a portion having a relatively high height, the second support 321 is thinned upward at the position so as not to affect the shaft cover 41, and when the swing arm is folded, because the rotating portion 431 of the swing arm is provided and the rotating portion 431 has a portion having a relatively high height, the second support 321 is thinned upward at the position so as not to affect the swing arm, and the second support 321 is recessed downward and thinned upward so that the support has the minimum wall thickness, therefore, the minimum wall thickness at the position can be hollowed out so as to form the hollowed portion 322. The hollowed-out portion 322 may be formed to expose at least the highest portion of the rotating portion 431 and at least the highest portion of the shaft cover 41.

In sum, through carrying out the hole design in the minimum wall thickness position department of second support piece, form fretwork portion, so, the position department of the minimum wall thickness of support piece becomes zero by minimum wall thickness, has avoided folding cell-phone when being in different states, because all need remain the minimum wall thickness of support piece and lead to folding cell-phone's thickness thicker problem, has realized folding cell-phone thickness reduction's effect when folding state and expansion state. Through verification, by adopting the scheme, the folding terminal can be correspondingly thinned by 0.2-0.3mm.

It should be noted that, when the minimum wall thickness is caused by the avoidance constraint of the swing arms in the folded state, referring to fig. 12, in some embodiments, since the number of the first swing arms 42 and the second swing arms 43 may be plural, the hollowed-out portions 322 may be disposed at positions corresponding to the highest portion of the rotation portion of each second swing arm 43, that is, the number of hollowed-out portions 322 is plural, and the plural hollowed-out portions 322 are disposed at intervals. For example, the number of the first swing arms 42 and the second swing arms 43 may be two, so the hollowed portions 322 may be disposed at positions corresponding to the highest portion of the rotation portions of each second swing arm 43, that is, the number of hollowed portions 322 is two at this time, and the two hollowed portions 322 are disposed at intervals. Of course, in this case, the number of the hollowed-out portions 322 may be one, and one hollowed-out portion 322 is provided at a position corresponding to the highest portion of the rotation portion of each second swing arm 43, for example, see fig. 13.

For the dimension of the hollowed-out portion 322 along the X-axis direction, that is, the width of the hollowed-out portion 322, the dimension of the hollowed-out portion 322 is limited in the embodiment of the present application, and a person skilled in the art can set according to actual situations. In some embodiments, with continued reference to fig. 9, along the X-axis direction, hollowed out portion 322 includes a first end surface 322a and a second end surface 322b, with second end surface 322b being located on a side of first end surface 322a facing away from axis S0. The first end face 322a is a distance from the axis S0 that is greater than or equal to 1.5mm and the second edge 322b is a distance from the axis S0 that is less than or equal to 10mm. This arrangement can avoid affecting the strength of the middle frame when the distance from the first end surface 322a to the axis S0 is too small and the distance from the second end surface 322b to the axis S0 is too large, i.e., the width of the hollowed-out portion 322 is wide, and can also avoid affecting the rotation of the rotating shaft structure 40 when the distance from the first end surface 322a to the axis S0 is too large and the distance from the second end surface 322b to the axis S0 is too small.

For the shape of the hollowed-out portion 322, the shape of the hollowed-out portion 322 is not limited, and those skilled in the art can set according to practical situations. For example, the orthographic projection shape of the hollowed portion 322 on the XY plane includes a rectangle, a racetrack shape, or a rounded rectangle, etc., where in the embodiments of the present application, the orthographic projection shape of the hollowed portion 322 on the XY plane is taken as an example for describing the rounded rectangle.

In order to avoid the problem that dust and/or liquid enters the machine body through the hollowed-out part 322 to cause the failure of the folding terminal. Referring to fig. 14, along the X-axis direction, the hollowed-out portion 322 includes a first end surface 322a and a second end surface 322b, and the second end surface 322b is located on a side of the first end surface 322a away from the axis S0. The structural assembly further includes a first sealing structure 50 and a second sealing structure 60, wherein the first sealing structure 50 is filled in a first gap S1 formed between the first end face 322a, the display screen 31 and the cover plate 311, and the second sealing structure 60 is filled in a second gap S2 formed between the first surface and the display screen. Gaps at corresponding positions of the hollowed-out parts are sealed through the first sealing structure 50 and the second sealing structure 60, so that dust and/or liquid is prevented from entering the machine body through the hollowed-out parts 322.

As for the materials of the first sealing structure 50 and the second sealing structure 60, the materials of the first sealing structure 50 and the second sealing structure 60 are not limited in the embodiments of the present application, and may be selected by those skilled in the art according to practical situations. The first sealing structure 50 may be, for example, one of a soft gel, a jelly gel, a sealant, etc., and the second sealing structure 60 may be, for example, one of a soft gel, a jelly gel, a sealant, a back gel, etc. With continued reference to fig. 14, when the first sealing structure 50 may be, for example, a soft gel, a jelly gel or a sealant, the soft gel, the jelly gel or the sealant may be disposed at a position of the cover plate 311 corresponding to the first gap S1 through a dispensing process, then the cover plate provided with the soft gel, the jelly gel or the sealant is pressed on the second display unit 31, the soft gel, the jelly gel or the sealant is filled in the first gap S1, and then the first sealing structure 50 is formed by curing. With continued reference to fig. 14, when the second sealing structure 60 may be, for example, a soft gel, a jelly gel or a sealant, the soft gel, the jelly gel or the sealant may be disposed at a position of the second display unit 31 corresponding to the second gap S2 through a dispensing process, then a cover plate provided with the soft gel, the jelly gel or the sealant is pressed on the second supporting member 321, the soft gel, the jelly gel or the sealant is filled in the second gap S2, and then the second sealing structure 60 is formed by curing. Referring to fig. 15, when the second sealing structure 60 is a back adhesive, the back adhesive may be attached at a position of the second support 321 corresponding to the second gap S2 or at a position of the second display unit 31 corresponding to the second gap S2, for example.

When the first sealing structure 50 and the second sealing structure 60 are soft glue such as soft glue, jelly glue, sealant glue, back glue and the like, the sealing structure can be prevented from being extruded when being contacted with other structures, for example, the sealing structure can be prevented from being extruded when being contacted with a display screen, so that the display effect of the display screen is affected, and the process steps are simpler when the sealing structure is arranged. When the second sealing structure 60 is a back adhesive, the process is simple, and the attaching precision between the second display unit 31 and the second supporting member 321 can be ensured, so as to ensure the sealing effect of the second gap S2 formed between the first surface 321a and the second display unit 31.

Of course, the manner of preventing dust and/or liquid from entering the body through the hollowed-out portion 322 in the X-axis direction is not limited to the above example. In other alternative embodiments of the present application, referring to fig. 16 and 17, a protective layer 70 may be further disposed on the hollowed-out portion 322, where the protective layer 70 is used to cover the hollowed-out portion 322.

This is because: the material of the middle frame is generally an aluminum alloy, the minimum wall thickness of the aluminum alloy can be 0.3mm, when the minimum wall thickness is smaller than 0.3mm, the middle frame cannot be molded, therefore, the hollow part 322 is covered by a structure of hollowing out the position with the minimum wall thickness and then arranging other materials at the hollowing-out position, wherein the thickness of the molded material can be smaller than 0.3mm, and thus, the effect of the middle frame at the position when not hollowing out can be achieved, for example, the strength of the middle frame is enhanced, dust and/or liquid inlet is prevented from entering the machine body, and the thickness of the whole machine can be thinned.

In some embodiments, the thickness of the protective layer is greater than or equal to 0.05mm and less than or equal to 0.1mm along the Z-axis, and the thickness at the location can be reduced compared to the minimum wall thickness at the location, so that the thickness of the protective layer is reduced to a thickness smaller than the minimum wall thickness of the support (after being smaller than the minimum wall thickness, the support cannot be reliably formed). The thickness of the protective layer 70 may be, for example, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, or the like.

The material of the protective layer 70 in the embodiment of the present application is not limited, as long as the purpose of reducing the thickness of the whole machine can be achieved. Illustratively, the material of the protective layer 70 includes steel, mylar, plastic, or the like. When the material of the protective layer 70 is steel, mylar or plastic, the thickness of the protective layer may be made smaller than the minimum wall thickness of the support member, thereby ensuring the effect of a reduced thickness of the folding terminal in both the folded and unfolded states.

The arrangement of the protective layer 70 is not limited in the embodiment of the present application.

In some possible implementations, with continued reference to fig. 17, the protective layer 70 includes a first section 71, a second section 72, and a third section 73 connected in sequence. The third section 73 comprises a first sub-portion 731 connected to the second section 72 and a second sub-portion 732 connected to the first sub-portion 731. The first section 71 is secured to the first surface 321a that is connected to the first end face 322a, such as by welding or bonding, such that the first section 71 is secured to the first surface 321 a. The second sub-portion 72 is opposite to the first end surface 322a, the first sub-portion 731 is used for covering the hollow portion 322, the second sub-portion 732 is fixed on the first surface 322a connected to the second end surface 322b, for example, by welding or bonding, so that the second sub-portion 732 is fixed on the first surface 322a, that is, the projection of the protective layer 70 on the plane perpendicular to the XZ is in a "Z" shape, which has a simple structure, and can prevent dust and/or liquid from entering into the machine body through the hollow portion. Optionally, the first section 71 is parallel to the third section 73, and the second section 72 is perpendicular to the first section 71 and the third section 73. By this arrangement, the gap between the second display unit 31 and the first end face 322a can be made smaller, and the full screen effect of the external screen is not facilitated when the gap between the second display unit 31 and the first end face 322a is larger.

In some possible implementations, referring to fig. 18, the protective layer 70 includes a first section 71, a second section 72, and a third section 73 connected in sequence. The first portion 71 is fixedly connected to the first end face 322a, for example, by welding or bonding, so that the first portion 71 is fixed to the first end face 322a, the third portion 73 is fixedly connected to the second end face 322b, for example, by welding or bonding, so that the third portion 73 is fixed to the second end face 322b, and the second portion 72 is used for covering the hollow portion 322 to prevent dust and/or liquid from entering the machine body through the hollow portion 322. Optionally, the first section 71 is parallel to the third section 73, and the second section 72 is perpendicular to the first section 71 and the third section 73. By this arrangement, the gap between the second display unit 31 and the first end face 322a can be made smaller, and the full screen effect of the external screen is not facilitated when the gap between the second display unit 31 and the first end face 322a is larger.

As can be seen from the above, when the minimum wall thickness is caused by the constraint of avoiding the swing arms in the folded state, in some embodiments, since the number of the first swing arms 42 and the second swing arms 43 may be multiple, the hollowed-out portions 322 may be disposed at the positions corresponding to the highest portion of the rotation portion of each second swing arm 43, that is, the number of hollowed-out portions 322 is multiple, and the multiple hollowed-out portions 322 are disposed at intervals, that is, the middle frame aluminum alloy structure may be reserved in the non-thickness bottleneck point region (such as the position avoiding the swing arms) of the rotation shaft. Correspondingly, the protective layer 70 on the hollowed-out portion 322 is also placed in sections to increase the strength of the middle frame.

The above example only describes an example in which the hollow portion 322 is sealed in the X-axis direction, and dust and/or liquid is prevented from entering the machine body through the hollow portion 322 in the X-axis direction. In order to prevent dust and/or liquid from entering the machine body through the hollow portion 322 in the Y-axis direction (for example, a sealing structure is provided), referring to fig. 19, the shaft cover 41 includes a middle portion 413 and edge portions 414 located at both sides of the middle portion 413 in the Y-axis direction, the edge portions 414 include a first edge 414a and a second edge 414b, the first edge 414a is an edge contacting the middle portion 413, and the second edge 414b is located at a side of the first edge 414a facing away from the middle portion 413. From the first edge 414a to the second edge 414b, the height of the edge portion 414 gradually decreases. The second support 321 is provided with a protrusion 321e corresponding to the edge 414. Referring to fig. 20, the first and second sealing structures 50 and 60 extend to the position of the protrusion 321e to be in contact with the protrusion 321e.

That is, along the Y-axis direction, the edge of the shaft cover 41 is lowered, and correspondingly, the second supporting member 321 protrudes corresponding to the lowered position of the shaft cover 41, and seals the hollow portion 322 in the Y-axis direction through the protruding portion 321e, and because the material of the sealing structure is a glue material, when the glue dispensing is completed, the glue material flows to the position of the protruding portion 321e and the protruding portion 321e, so that dust and/or liquid can be prevented from entering the machine body in the Y-axis direction, that is, a closed sealing ring is formed in the X-axis direction and the Y-axis direction, and the sealing effect is further ensured.

The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (14)

1. A structural assembly, comprising: at least two airframes and a rotating shaft structure connecting the adjacent airframes;

the fuselage comprises a center and a shell, the center comprising a support; the support comprises a first surface and a second surface which are opposite, and the shell is arranged on the first surface;

the rotating shaft structure comprises a shaft cover and a swing arm, and the shaft cover and the swing arm are positioned on one side of the second surface, which is away from the first surface; the swing arm comprises a rotating part and a connecting part;

the rotating part of the swing arm is connected with the shaft cover, the connecting part of the swing arm is connected with the supporting piece, and the swing arm is configured to rotate around the axis of the rotating shaft structure so as to enable the two machine bodies to be folded or unfolded around the axis;

Wherein, at least one support piece of the machine body is provided with a hollowed-out part; when the two airframes are in an unfolding state, the hollowed-out parts at least expose the highest part of the shaft cover, the highest part of the shaft cover is the part closest to the shell in the part where the shaft cover is overlapped with the shell along the direction perpendicular to the first direction; and/or when the two machine bodies are in a folded state, the hollowed-out parts at least expose the highest part of the rotating parts, the highest part of the rotating parts is the part closest to the shell in the part where the rotating parts overlap with the shell along the direction perpendicular to the first direction; the first direction is a direction perpendicular to the housing.

2. The structural assembly of claim 1, wherein the housing of at least one of the fuselage includes a display screen, a side of the display screen facing away from the center being provided with a cover plate fixedly connected to the display screen;

the support piece comprises a step part and a support part along a second direction; the hollow part is arranged on the supporting part; the cover plate is fixed on the step part so that the display screen is positioned on the supporting part; the second direction is a direction perpendicular to the first direction and perpendicular to the axis direction;

Along the second direction, the hollowed-out part comprises a first end face and a second end face, and the second end face is positioned at one side of the first end face away from the axis;

the structure assembly further comprises a first sealing structure and a second sealing structure, wherein the first sealing structure is filled in a first gap formed between the first end face, the display screen and the cover plate, and the second sealing structure is filled in a second gap formed between the first surface and the display screen.

3. The structural assembly of claim 2, wherein the first seal structure and the second seal structure each comprise one of a soft gel, a jelly, and a sealant.

4. The structural assembly of claim 2, wherein the first sealing structure comprises one of a soft gel, a jelly, a sealant; the second sealing structure comprises a back adhesive.

5. The structural assembly of claim 2, wherein in a third direction, the shaft cover includes a middle portion and edge portions on either side of the middle portion, the edge portions including a first edge that is in contact with the middle portion and a second edge on a side of the first edge that faces away from the middle portion;

From the first edge to the second edge, the height of the edge part gradually decreases;

the support piece is provided with a protruding part matched with the edge part at a position corresponding to the edge part, and the first sealing structure and the second sealing structure extend to the protruding part position so as to be in contact with the protruding part;

wherein the third direction is parallel to the axis.

6. The structural assembly of claim 1, further comprising a protective layer for covering the hollowed-out portion.

7. The structural assembly of claim 6, wherein the protective layer has a thickness greater than or equal to 0.05mm and less than or equal to 0.1mm in the first direction.

8. The structural assembly of claim 6, wherein the material of the protective layer comprises steel, mylar, or plastic.

9. The structural assembly of claim 6, wherein the protective layer comprises a first section, a second section, and a third section connected in sequence;

along a second direction, the hollowed-out part comprises a first end face and a second end face, and the second end face is positioned at one side of the first end face, which is away from the axis; the second direction is a direction perpendicular to the first direction and perpendicular to the axis direction;

The first subsection is fixedly connected with the first end face, the third subsection is fixedly connected with the second end face, and the second subsection is used for covering the hollowed-out portion.

10. The structural assembly of claim 6, wherein the protective layer comprises a first section, a second section, and a third section connected in sequence; the third subsection comprises a first sub-part connected with the second subsection and a second sub-part connected with the first sub-part;

along a second direction, the hollowed-out part comprises a first end face and a second end face, and the second end face is positioned at one side of the first end face, which is away from the axis; the second direction is a direction perpendicular to the first direction and perpendicular to the axis direction;

the first subsection is fixed on the first surface connected with the first end face, the second subsection is opposite to the first end face, the first sub-section is used for covering the hollowed-out section, and the second sub-section is fixed on the first surface connected with the second end face.

11. The structural assembly of claim 9 or 10, wherein the first subsection is parallel to the third subsection and the second subsection is perpendicular to the first subsection and the third subsection.

12. The structural assembly of claim 1, wherein in a second direction, the hollowed-out portion comprises a first end face and a second end face, the second end face being located on a side of the first end face facing away from the axis; the second direction is a direction perpendicular to the first direction and perpendicular to the axis direction;

the first end face is at a distance of greater than or equal to 1.5mm from the axis and the second end face is at a distance of less than or equal to 10mm from the axis.

13. The structural assembly of claim 1, wherein the cross-sectional shape of the hollowed-out portion at a reference plane comprises a rectangle or rounded rectangle, wherein the reference plane is perpendicular to the first direction.

14. A folding terminal comprising a flexible screen and a structural assembly according to any one of claims 1 to 13;

the structural assembly is used for supporting the flexible screen.