Electronic device with multiple folding forms

Abstract

The invention relates to electronic equipment with multiple folding forms, which comprises a rotating shaft structure, a plurality of back plates and a flexible screen connected to the front surfaces of the plurality of back plates, and is characterized in that the rotating shaft structure comprises a first base and a second base which are arranged in a crossed manner, a drop-shaped hinge arranged on the first base and a U-shaped hinge arranged on the second base; wherein the water-drop-shaped hinge and the U-shaped hinge are respectively provided with two rotating arms positioned on two opposite sides of the first base and the second base, and each back plate is respectively and correspondingly connected to the adjacent rotating arms on the water-drop-shaped hinge and the U-shaped hinge from two adjacent side edges. On one hand, the screen can be folded in different directions by switching between U-shaped folding and water-drop-shaped folding through the rotating shaft structure, so that the use requirements of the screen in different scenes are met, and the use experience of a user is improved; on the other hand, the structure is simple and operation is convenient.

Description

Technical Field

[0001] The present invention belongs to the field of electronic products, and in particular relates to an electronic device with a multi-folding form. Background Art

[0002] As we all know, in order to display more abundant information to users, improve the efficiency of human-computer communication and enhance the user experience, various electronic equipment terminals (such as mobile phones, tablet computers, etc.) are constantly updated and replaced, and the screen size is getting larger and larger. Correspondingly, electronic equipment terminals with large screens will bring problems of inconvenience in carrying and storage.

[0003] Therefore, in order to solve the above problems, folding screen technology came into being. The Chinese patent with publication number CN110891108A discloses a folding screen hinge structure and a folding screen electronic device, the folding screen hinge structure includes a plurality of shaft pins and a plurality of damping blocks, the plurality of shaft pins are connected side by side and extend along a first direction, two adjacent shaft pins are connected along a second direction through a damping block, the second direction is perpendicular to the first direction, and the two shaft pins located on the outermost sides are respectively slidably connected to the folding screen.

[0004] However, in actual use, the above-mentioned electronic devices can only realize one-way unfolding or folding of the screen, and the usage scenario is single, which cannot meet the user's demand for multi-functional use of flexible screens, affecting the user experience. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a new electronic device with a multi-folding form.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An electronic device with a multi-folding form comprises a hinge structure, a plurality of back panels, and a flexible screen connected to the front sides of the plurality of back panels, wherein the hinge structure comprises a first base and a second base arranged in a cross shape, a teardrop-shaped hinge arranged on the first base, and a U-shaped hinge arranged on the second base, wherein the teardrop-shaped hinge and the U-shaped hinge respectively have two rotating arms located on opposite sides of the first base and the second base, and each back panel is respectively connected to adjacent rotating arms on the teardrop-shaped hinge and the U-shaped hinge from adjacent two side edges, when the teardrop-shaped hinge is folded, the U-shaped hinge is unfolded, and the second base is folded synchronously therewith to form a teardrop-shaped space between it and the first base; when the U-shaped hinge is folded, the teardrop-shaped hinge is unfolded, and the first base is folded synchronously therewith to form a U-shaped space between it and the second base.

[0008] According to a specific implementation and preferred aspect of the present invention, when the U-shaped hinge is folded, the angle formed after the first base is folded is 80° to 110°. Here, when applied to an electronic device, the screen can hover at this angle, facilitating the use of the two parts of the screen for different functions.

[0009] Preferably, the first base includes a first body, a second body and a third body respectively rotatably connected to opposite sides of the first body, and there are a plurality of water-drop-shaped hinges respectively connected to the second body and the third body.

[0010] Specifically, the length of the second body is d1, and the length of the third body is d2, where 3d2 ≤ d1 ≤ 5d2. Here, after U-shaped folding, through the layout of the second body and the third body, it is convenient to form different-sized areas on the screen for different functions, such as a display function and a keyboard function.

[0011] Furthermore, arc-shaped track grooves are respectively formed on opposite sides of the first body, and arc-shaped portions matching the track grooves are respectively formed on the second body and the third body. During folding, the two arc-shaped portions slide along the corresponding track grooves. Here, the folding process is stable, improving the operating feel.

[0012] Preferably, when the U-shaped hinge is unfolded, the first body, the second body, and the third body are arranged flush, and the second body and the third body are respectively arranged in contact with the corresponding end faces of the first body from the end faces. Here, when the first base unfolds synchronously with the U-shaped hinge, the fitting gap between the second and third bodies and the first body can be eliminated, thereby improving the support for the screen.

[0013] According to another specific implementation and preferred aspect of the present invention, the second base includes a fourth body and a fifth body respectively arranged on the other opposite sides of the first body, and there are a plurality of U-shaped hinges respectively connected to the fourth body and the fifth body; as the water-drop-shaped hinge folds or unfolds, the fourth body and the fifth body synchronously flip relative to the first body.

[0014] Preferably, the fourth body and the fifth body are symmetrically arranged relative to the center of the first body. Here, during water-drop-shaped folding, the screen is folded in half.

[0015] Specifically, folding plates are respectively formed at one ends of the fourth body and the fifth body close to the first body. When the water-drop-shaped hinge is folded, the two folding plates incline downward and outward, and a water-drop-shaped space is formed between the two folding plates and the first body; in the orthographic projection in the length direction of the first base, the folding plates coincide with the rotating arms of the water-drop-shaped hinge. Here, through the design of the folding plates, not only can the interference between the fourth and fifth bodies and the first body during the folding movement be avoided, but also the space formed by the water-drop-shaped hinge and the space formed between the folding plates are the same.

[0016] According to yet another specific implementation and preferred aspect of the present invention, the rotating shaft structure further includes a first bottom case and a second bottom case respectively connected to the bottoms of the first base and the second base; connection grooves recessed inward from the front are respectively formed on the corresponding sides of each back plate, and the rotating arms of the water-drop-shaped hinge and the U-shaped hinge are respectively inserted and connected into the corresponding connection grooves. When the water-drop-shaped hinge or the U-shaped hinge is folded, a hidden space is formed between the first bottom case or the second bottom case and the connection grooves on both sides, and the water-drop-shaped hinge or the U-shaped hinge is hidden in the hidden space; when the water-drop-shaped hinge and / or the U-shaped hinge is unfolded, the connection grooves on the opposite sides are butted to form a receiving groove, and the water-drop-shaped hinge and / or the U-shaped hinge, the first bottom case and / or the second bottom case are synchronously hidden in the corresponding receiving grooves.

[0017] Preferably, one side of each connection groove is open. When unfolded, the connection grooves on the opposite sides are spliced from the open side to form a receiving groove; hereby, not only the connection grooves on the two side back plates are automatically spliced when unfolded to cover the rotating shaft structure, but also seamless splicing between the back plates is achieved when unfolded.

[0018] Preferably, a plurality of insertion slots are further formed on the inner side walls of each connection groove. During assembly, each rotating arm is inserted and positioned in the corresponding insertion slot. Hereby, it is convenient to accurately align each back plate and connect it to the rotating shaft structure.

[0019] According to yet another specific implementation and preferred aspect of the present invention, the first bottom case and the second bottom case have the same structure. The first bottom case includes a case body extending along the length direction of the first base and end plates provided at both ends of the case body. A mounting space is formed between the case body and the base body, and each water-drop-shaped hinge is mounted in the mounting space. Hereby, the protection of the hinge structure is further improved, and at the same time, the installation is simple.

[0020] Preferably, the cross-section of the case body is U-shaped. Hereby, when folded and the outer shell is exposed, the bottom of the outer shell is relatively round, avoiding the "cutting hand" feeling.

[0021] Specifically, the bottom surface of the case body gradually slopes downward from both sides to the middle. Hereby, during the folding process, interference between the outer shell and the back plates on both sides can be effectively avoided.

[0022] Furthermore, when unfolded, the lowest point of the bottom surface of the case body is tangent to the bottom of the receiving groove. Hereby, the space of the receiving groove is minimized, which is beneficial to reducing the thickness of the electronic device and improving the hand feeling.

[0023] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0024] The electronic devices of the prior art can only realize one-way folding or unfolding of the screen, and the usage scenarios are single, which cannot meet the user's needs for multi-functional use; however, the present application designs the structure of the electronic device as a whole, cleverly solving the shortcomings and defects of the prior art. After adopting the electronic device, the teardrop-shaped hinge is folded, the U-shaped hinge is unfolded, the second base is folded synchronously and forms a teardrop-shaped space between the first base, thereby realizing the inward folding and closing of the flexible screen; the U-shaped hinge is folded, the teardrop-shaped hinge is unfolded, the first base is folded synchronously and forms a U-shaped space between the second base, thereby the screens on both sides of the U-shaped space can be used for different functions (such as display function, keyboard function) respectively; the U-shaped hinge and the teardrop-shaped hinge are unfolded at the same time, so as to maximize the screen and realize the use demand of a large screen; therefore, compared with the prior art, the present invention can switch between U-shaped folding and teardrop-shaped folding through the hinge structure on the one hand, realize the folding of the screen in different directions, thereby meeting the use demand of the screen in different scenarios and improving the user experience; on the other hand, the structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the electronic device of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure decomposition of the electronic device of the present invention;

[0027] Figure 3 for Figure 2 Schematic diagram of the structural decomposition of the central shaft structure;

[0028] Figure 4 for Figure 2 A first partial cross-sectional schematic diagram of the central shaft structure in an unfolded state;

[0029] Figure 5 for Figure 2 A second partial cross-sectional schematic diagram of the central shaft structure in an expanded state;

[0030] Figure 6 for Figure 2 A partial cross-sectional schematic diagram of the central shaft structure in a 90° folded state;

[0031] Figure 7 for Figure 2 A partial cross-sectional schematic diagram of the central shaft structure in a folded state;

[0032] Among them: ①. Rotating shaft structure; 1. First base; 11. First body; 110. Upper split body; 111. Lower split body; c0. Track groove; 12. Second body; 13. Third body; b. Arc part; 2. Second base; 24. Fourth body; 25. Fifth body; d. Folding plate; 3. Drop-shaped hinge; 4. U-shaped hinge; q1. Drop-shaped space; q2. U-shaped space; 5. First bottom case; 50. Case body; 51. End plate; 6. Second bottom case;

[0033] ②. Back plate; c1. Connection groove. Detailed implementation manners

[0034] To make the above objects, features, and advantages of the present application more apparent and understandable, the present application will be described in detail below in combination with the accompanying drawings and specific implementation manners. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0037] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "above", "below", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0040] As Figures 1 to 7 shown, the electronic device with a multi-folded form involved in this embodiment includes a rotating shaft structure ①, four backplates ②, and a flexible screen connected to the front sides of the four backplates ②.

[0041] Specifically, the rotating shaft structure ① includes a first base 1 and a second base 2 arranged in a cross-shaped intersection, and a water-drop hinge 3 and a U-shaped hinge 4 respectively arranged on the first base 1 and the second base 2. The first base 1 and the second base 2 can be respectively folded from the intersection, and the folding directions are perpendicular to each other.

[0042] In some specific embodiments, the first base 1 includes a first body 11, a second body 12 and a third body 13 respectively rotatably connected to opposite sides of the first body 11; arc-shaped track grooves c0 extending inward are respectively formed on opposite sides of the first body 11, and arc-shaped portions b matching the track grooves c0 are respectively formed at corresponding ends of the second body 12 and the third body 13. The two arc-shaped portions b are correspondingly inserted into the two track grooves c0. Before folding, the top surfaces of the first body 11, the second body 12 and the third body 13 are flush, and the second body 12 and the third body 13 are respectively in contact with the corresponding end surfaces of the first body 11 from the end surfaces; when folding, the two arc-shaped portions b slide along the corresponding track grooves c0; the length of the second body 12 is d1, and the length of the third body 13 is d2, where 3d2 ≤ d1 ≤ 5d2. In some specific embodiments, d1 = 4d2.

[0043] For the convenience of assembly, the first base body 11 includes an upper split body 110 and a lower split body 111 connected to the bottom of the upper split body 110. The lower split body 111 and the upper split body 110 are separated from each other on both sides and form a track groove c0.

[0044] In some specific embodiments, the second base 2 includes a fourth base body 24 and a fifth base body 25 respectively arranged on the other two opposite sides of the first base body 11. The fourth base body 24 and the fifth base body 25 are symmetrically arranged with respect to the center of the first base body 11. At the same time, at one end of the fourth base body 24 and the fifth base body 25 close to the first base body 11, there are respectively formed folding plates d for avoiding interference with the first base body 11.

[0045] In this example, there are multiple water-drop-shaped hinges 3 which are respectively fixedly connected to the second base body 12 and the third base body 13, and there are multiple U-shaped hinges 4 which are respectively fixedly connected to the fourth base body 24 and the fifth base body 25. Each of the water-drop-shaped hinges 3 and the U-shaped hinges 4 has two rotating arms located on the opposite sides of the first base 1 and the second base 2. The water-drop-shaped hinges 3 and the U-shaped hinges 4 can be water-drop-shaped hinges and U-shaped hinges of any conventional structure. Therefore, they will not be elaborated here and are clearly implementable.

[0046] To further facilitate the assembly of each hinge, the rotating shaft structure ① further includes a first bottom shell 5 and a second bottom shell 6 respectively connected to the bottoms of the first base 1 and the second base 2.

[0047] In some specific embodiments, the structures of the first bottom shell 5 and the second bottom shell 6 are the same. Therefore, the structure of the first bottom shell 5 will be described below, and the structure of the second bottom shell 6 will also be clear.

[0048] The first bottom shell 5 includes a shell body 50 extending along the length direction of the first base 1 and end plates 51 arranged at both ends of the shell body 50. The shell body 50 is segmented and is in one-to-one correspondence and cooperation with the first base body 11, the second base body 12, and the third base body 13. The shell body 50 is spaced apart corresponding to the second base body 12 and the third base body 13 to form an installation space. Each water-drop-shaped hinge 3 is fixedly installed in the installation space, and the two rotating arms respectively extend out of the installation space on both sides.

[0049] Specifically, the cross-section of the shell body 50 is U-shaped, and the bottom surface of the shell body 50 gradually slopes downward from both sides to the middle.

[0050] In this example, the four back plates ② are all rectangular plates. Each of the back plates ② is correspondingly connected to the adjacent rotating arms of the water-drop-shaped hinge 3 and the U-shaped hinge 4 from the adjacent two sides.

[0051] In some specific embodiments, connecting grooves c1 recessed inward from the front are respectively formed on adjacent side edges of each backplane ②. One side of each connecting groove c1 is open, and a plurality of insertion grooves capable of being inserted and matched with the ends of the respective rotating arms one by one are formed on the inner side wall of the opposite side. During assembly, the respective rotating arms of the drop-shaped hinge 3 and the U-shaped hinge 4 are respectively inserted and connected into the corresponding connecting grooves c1.

[0052] Therefore, when the drop-shaped hinge 3 or the U-shaped hinge 4 is folded, the corresponding backplane ② can drive the second base 2 or the first base 1 to fold synchronously.

[0053] In some specific embodiments, when the drop-shaped hinge 3 is folded, the U-shaped hinge 4 is unfolded, and the second base 2 folds synchronously therewith and forms a drop-shaped space q1 with the first base 1; when the U-shaped hinge 4 is folded, the drop-shaped hinge 3 is unfolded, and the first base 1 folds synchronously therewith and forms a U-shaped space q2 with the second base 2; when the drop-shaped hinge 3 and the U-shaped hinge 4 are unfolded simultaneously, the fronts of the four backplanes ②, the top surfaces of the first base 1 and the second base 2 are flush.

[0054] That is to say, when the drop-shaped hinge 3 is unfolded, the fourth seat body 24 and the fifth seat body 25 extend horizontally, and the two folding plates d incline obliquely downward and are offset from the first seat body 11 to avoid interference; when the drop-shaped hinge 3 is folded, the fourth seat body 24 and the fifth seat body 25 extend vertically, the two folding plates d incline downward and outward from top to bottom, and a drop-shaped space q1 is formed between the two folding plates d and the first seat body 11. At this time, in the front projection in the length direction of the first base 1, the two folding plates d coincide with the rotating arms of the drop-shaped hinge 3 correspondingly, so that the drop-shaped space q1 formed between the two folding plates d and the first seat body 11 is consistent with the drop-shaped space formed by the folding of the drop-shaped hinge 3. When the U-shaped hinge 4 is unfolded, the second seat body 12 and the third seat body 13 extend horizontally; when the U-shaped hinge 4 is folded, the angle formed after the first base 1 is folded is 80° to 110°, that is, under the cooperation of the torsion formed by the U-shaped hinge 4, the folded first base 1 can hover at any angle within 80° to 110°.

[0055] In addition, when the drop-shaped hinge 3 or the U-shaped hinge 4 is folded, a hidden space is formed between the first bottom shell 5 or the second bottom shell 6 and the connecting grooves c1 on the backplanes ② on the opposite sides, and the drop-shaped hinge 3 or the U-shaped hinge 4 is hidden in the hidden space; when the drop-shaped hinge 3 or / and the U-shaped hinge 4 is unfolded, the connecting grooves c1 on the opposite sides are spliced from the open side to form a receiving groove, and the drop-shaped hinge 3 or / and the U-shaped hinge 4, the first bottom shell 5 or / and the second bottom shell 6 are synchronously hidden in the corresponding receiving groove, and the lowest point of the bottom surface of the first bottom shell 5 or / and the second bottom shell 6 is tangent to the bottom of the receiving groove.

[0056] In summary, after adopting this electronic device, when the folding water-drop hinge is folded and the U-shaped hinge is unfolded, the second base synchronously folds over and forms a water-drop-shaped space with the first base. Here, the flexible screen can be folded and closed inward. When the U-shaped hinge is folded and the water-drop hinge is unfolded, the first base synchronously folds over and forms a U-shaped space with the second base. Here, the screens on both sides of the U-shaped space can be respectively applied to different functions (such as display function, keyboard function). When the U-shaped hinge and the water-drop hinge are unfolded simultaneously, the screen can be maximized to meet the usage requirements of a large screen. Therefore, compared with the prior art, on the one hand, the present invention can switch between U-shaped folding and water-drop-shaped folding through the rotating shaft structure, realizing the folding of the screen in different directions, so as to meet the usage requirements of the screen in different scenarios and improve the user experience. On the other hand, the structure is simple and the operation is convenient. Thirdly, when the U-shaped hinge is folded, the flexible screen can hover at an angle between 80° and 110°, which is convenient for using the two parts of the screen for different functions respectively. For example, one part is used for the display function and the other part is used for the keyboard function, facilitating better display and operation of the folding tablet computer or mobile phone. Fourthly, not only are the connection slots on both side backplates automatically spliced when unfolded to cover the rotating shaft structure, but also seamless splicing is achieved between the backplates when unfolded. Fifthly, the space of the accommodation groove is minimized, which is beneficial to reducing the thickness of the electronic device and improving the feel.

[0057] The above has described the present invention in detail. The purpose is to enable those skilled in this field to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An electronic device with a multi-folded form, which includes a rotating shaft structure, a plurality of backplates, and a flexible screen connected to the front sides of the plurality of backplates. Characterized in that: The rotating shaft structure includes a first base and a second base arranged in a cross-shaped intersection, a water-drop-shaped hinge provided on the first base, and a U-shaped hinge provided on the second base. The water-drop-shaped hinge and the U-shaped hinge respectively have two rotating arms located on opposite sides of the first base and the second base. Each backplate is respectively connected to adjacent rotating arms on the water-drop-shaped hinge and the U-shaped hinge from adjacent two sides. When the water-drop-shaped hinge is folded, the U-shaped hinge unfolds, and the second base is turned over synchronously therewith and forms a water-drop-shaped space with the first base; when the U-shaped hinge is folded, the water-drop-shaped hinge unfolds, and the first base is turned over synchronously therewith and forms a U-shaped space with the second base.

2. The electronic device with a multi-folded form according to claim 1, Characterized in that: The first base includes a first body, a second body and a third body respectively rotatably connected to opposite sides of the first body, and there are a plurality of water-drop-shaped hinges respectively connected to the second body and the third body.

3. The electronic device with a multi-folded form according to claim 2, Characterized in that: The length of the second body is d1, and the length of the third body is d2, where 3d2 ≤ d1 ≤ 5d2; and / or, arc-shaped track grooves are respectively formed on opposite sides of the first body, and arc-shaped parts matching the track grooves are respectively formed on the second body and the third body. When folding, the two arc-shaped parts slide along the corresponding track grooves; and / or, when the U-shaped hinge unfolds, the first body, the second body and the third body are arranged flush, and the second body and the third body are respectively attached to the corresponding end faces of the first body from the end faces.

4. The electronic device with a multi-folded form according to claim 2, Characterized in that: The second base includes a fourth body and a fifth body respectively arranged on the other opposite sides of the first body, and there are a plurality of U-shaped hinges respectively connected to the fourth body and the fifth body; as the water-drop-shaped hinge is folded or unfolded, the fourth body and the fifth body synchronously flip relative to the first body.

5. The electronic device with a multi-folded form according to claim 4, Characterized in that: The fourth body and the fifth body are symmetrically arranged relative to the center of the first body; and / or, folding plates are respectively formed at one ends of the fourth body and the fifth body close to the first body. When the water-drop-shaped hinge is folded, the two folding plates incline downward and outward, and the two folding plates and the first body form the water-drop-shaped space therebetween; in the orthographic projection in the length direction of the first base, the folding plates coincide with the rotating arms of the water-drop-shaped hinge.

6. The electronic device with a multi-folded form according to claim 1, Characterized in that: The rotating shaft structure further includes a first bottom shell and a second bottom shell respectively connected to the bottoms of the first base and the second base; connection grooves recessed inward from the front are respectively formed on the corresponding sides of each back plate, the rotating arms of the water-drop-shaped hinge and the U-shaped hinge are respectively inserted and connected into the corresponding connection grooves, when the water-drop-shaped hinge or the U-shaped hinge is folded, a hidden space is formed between the first bottom shell or the second bottom shell and the connection grooves on both sides, and the water-drop-shaped hinge or the U-shaped hinge is hidden in the hidden space; when the water-drop-shaped hinge or / and the U-shaped hinge is unfolded, the connection grooves on opposite sides are butted to form a receiving groove, and the water-drop-shaped hinge or / and the U-shaped hinge, the first bottom shell or / and the second bottom shell are synchronously hidden in the corresponding receiving groove.

7. The electronic device with a multi-folded form according to claim 6, wherein: One side of each connection groove is open. When unfolded, the connection grooves on opposite sides are spliced from the open side to form the receiving groove; a plurality of insertion grooves are further formed on the inner side wall of each connection groove. During assembly, each rotating arm is inserted and positioned in the corresponding insertion groove.

8. The electronic device with a multi-folded form according to claim 6, wherein: The first bottom shell and the second bottom shell have the same structure. The first bottom shell includes a shell body extending along the length direction of the first base and end plates provided at both ends of the shell body. A mounting space is formed by separating the shell body from the seat body, and each water-drop-shaped hinge is mounted in the mounting space.

9. The electronic device with a multi-folded form according to claim 8, wherein: The cross-section of the shell body is U-shaped.

10. The electronic device with a multi-folded form according to claim 8, wherein: The bottom surface of the shell body gradually slopes downward from both sides to the middle. When unfolded, the lowest point of the bottom surface of the shell body is tangent to the bottom of the receiving groove.

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