Swing mechanism and electronic equipment

Abstract

The utility model relates to the technical field of electronic equipment, in particular to a swinging mechanism and electronic equipment. The swing mechanism comprises a hinge base, a swing arm and a flexible circuit board. A hinge shaft is formed on the hinge base, and the swing arm is rotationally connected with the hinge shaft, so that the swing arm can be switched between an unfolded state and a folded state; a reel is formed on the hinge base, and the reel and the hinge shaft are arranged at an interval; the extension direction of the reel is consistent with the extension direction of the hinge shaft; the flexible circuit board comprises a first connecting part, a winding part and a second connecting part which are connected in sequence, the first connecting part is connected with the hinge base, the second connecting part is connected with the swing arm, and the winding part can be bent along with swing of the swing arm; wherein the winding part is arranged between the hinge base and the reel, and the winding part is wound on the outer side of the hinge base and the outer side of the reel, so that the deformation reliability of the flexible circuit board is ensured.

Description

Technical Field

[0001] This patent relates to the technical field of electronic equipment, and in particular to a swing mechanism and electronic equipment. Background Art

[0002] Currently, many electronic devices have multiple housing parts. For example, a laptop computer may include a display end housing and a keyboard end housing. Two adjacent housing parts may be mechanically connected by a hinge mechanism, and one housing part (such as the display end housing) may rotate relative to the other housing part (such as the keyboard end housing) around the rotation pivot axis of the hinge mechanism to achieve opening and closing of the electronic device. When the two housing parts need to transmit electrical signals, the electronic components on the two housing parts may be electrically connected by wires.

[0003] For existing laptop devices, the length of the product's wires is reserved during the design process to avoid wire pulling during use. The problem with this design is that the reserved wires are easily accumulated in the shell when the laptop is opened and closed. Utility Model Content

[0004] This patent provides a swing mechanism and an electronic device to at least solve the above technical problems existing in the prior art.

[0005] The first aspect of the present patent provides a swing mechanism, comprising: a hinge base, a swing arm and a flexible circuit board;

[0006] The hinge base is formed with a hinge shaft, and the swing arm is rotatably connected to the hinge shaft so that the swing arm can switch between an unfolded state and a folded state;

[0007] The hinge base is formed with a scroll, and the scroll is spaced apart from the hinge shaft; the extension direction of the scroll is consistent with the extension direction of the hinge shaft;

[0008] The flexible circuit board comprises a first connection portion, a winding portion and a second connection portion which are connected in sequence, the first connection portion is connected to the hinge base, the second connection portion is connected to the swing arm, and the winding portion can bend with the swing of the swing arm;

[0009] The winding portion is arranged between the hinge base and the reel, and the winding portion is respectively wound around the outside of the hinge base and the reel.

[0010] Furthermore, the swing mechanism also includes a hinge cap, which is sleeved on the hinge base and fixed to the swing arm, and a cavity for accommodating the winding part is formed between the hinge cap and the hinge base, and an opening is provided on the side wall of the hinge cap, and the winding part extends out from the opening.

[0011] Furthermore, the winding portion includes multiple layers of FPC, the multiple layers of FPC are stacked, and a gap is provided between two adjacent layers of FPC.

[0012] Furthermore, a bending area is formed in the area of ​​the winding portion located in the cavity.

[0013] Furthermore, the bending area includes a first arc-shaped recessed portion and a second arc-shaped recessed portion.

[0014] Furthermore, the bending area is wavy.

[0015] Further, the hinge base includes a first side surface and a second side surface, the scroll is located on one side of the first side surface or the second side surface, a portion of the flexible circuit board is connected to the first side surface to form a first fixing portion, or a portion of the flexible circuit board is connected to the second side surface to form a second fixing portion;

[0016] Alternatively, the hinge base includes a first side surface and a second side surface, the scroll is located on one side of the first side surface or the second side surface, part of the flexible circuit board is connected to the first side surface to form a first fixed portion, part of the flexible circuit board is connected to the second side surface to form a second fixed portion, and the area of ​​the flexible circuit board located between the first fixed portion and the second fixed portion forms a first bending portion.

[0017] Furthermore, the opening is provided with a first connecting plate and a second connecting plate, at least one of the first connecting plate and the second connecting plate is fixedly connected to the swing arm, and a channel for the winding portion to extend out is formed between the first connecting plate and the second connecting plate.

[0018] Furthermore, the first connecting plate is connected to a portion of the flexible circuit board to form a third fixing portion, and a second bending portion is formed between the third fixing portion and the second fixing portion.

[0019] Furthermore, the swing arm includes a rotating seat and a support plate, the rotating seat is provided with a mounting hole, the mounting hole is sleeved on the hinge shaft, and the support plate is connected to the second connecting portion;

[0020] And / or, the hinge shaft is provided with a torque transmission component.

[0021] Further, the hinge base is provided with a mounting groove, the mounting groove includes a first end and a second end which are arranged opposite to each other, the first end is far away from the rotating seat, the second end is close to the rotating seat of the swing arm, the first end is provided with a first limiting hole, and the second end is provided with a second limiting hole;

[0022] The mounting groove is provided with a limiting column, one end of the limiting column is passed through the first limiting hole, and the other end is passed through the second limiting hole;

[0023] The limiting column is provided with a limiting boss in the region where the mounting groove is located, and the elastic member is arranged on the limiting column and is located between the first end and the limiting boss;

[0024] One end of the elastic member abuts against the first end of the mounting groove, and the other end abuts against the limiting boss, so that the limiting column abuts against the rotating seat.

[0025] A second aspect of the present disclosure provides an electronic device, comprising the swing mechanism described in the first aspect.

[0026] The technical solution provided by this patent embodiment has the following advantages compared with the prior art:

[0027] The swing mechanism provided by the embodiment of the present patent includes a hinge base, a swing arm and a flexible circuit board; the hinge base is formed with a hinge shaft, and the swing arm is rotatably connected to the hinge shaft so that the swing arm can switch between an unfolded state and a folded state. The hinge base is formed with a scroll, and the scroll is spaced apart from the hinge shaft; the extension direction of the scroll is consistent with the extension direction of the hinge shaft. The flexible circuit board includes a first connection portion, a winding portion and a second connection portion connected in sequence, the first connection portion is connected to the hinge base, and the second connection portion is connected to the swing arm, and the winding portion can bend with the swing of the swing arm; wherein the winding portion is arranged between the hinge base and the scroll, and the winding portion is respectively wound on the outside of the hinge base and the scroll. The scroll can play a supporting and guiding role, so that the shape of the flexible circuit board is more stable when the swing mechanism is in the unfolded state, the folded state, and the switching between the unfolded state and the folded state, and the bending shape of the flexible circuit board can be controlled, so as to avoid redundancy and pulling of the flexible circuit board, thereby improving the strength of the flexible circuit board while ensuring the reliability of the deformation of the flexible circuit board, and further reducing the possibility of the flexible circuit board being bent and failing during dynamic bending.

[0028] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of this patent, nor is it intended to limit the scope of this patent. Other features of this patent will become easy to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other purposes, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0030] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0031] Figure 1 A schematic diagram of the structure of the swing mechanism provided by the embodiment of the present invention is shown;

[0032] Figure 2 for Figure 1 A partial enlarged view of point a in the middle;

[0033] Figure 3 The partial structure diagram of the swing mechanism provided by the embodiment of the present invention is shown. Figure 1 ;

[0034] Figure 4 The partial structure diagram of the swing mechanism provided by the embodiment of the present invention is shown. Figure 2 ;

[0035] Figure 5 The partial structure diagram of the swing mechanism provided by the embodiment of the present invention is shown. Figure 3 ;

[0036] Figure 6 The partial structure diagram of the swing mechanism provided by the embodiment of the present invention is shown. Figure 4 ;

[0037] Figure 7 It shows a structural schematic diagram of the folded state of the swing mechanism provided by the embodiment of the present invention;

[0038] Figure 8 A structural schematic diagram of the swing mechanism provided by an embodiment of the present patent is shown in an open state.

[0039] Explanation of the numbers in the figure: 1. hinge base; 11. hinge axis; 111. first side; 112. second side; 12. reel; 13. mounting groove; 131. second end; 132. first limiting hole; 133. second limiting hole; 2. swing arm; 21. rotating seat; 22. support plate; 3. flexible circuit board; 31. first connecting part; 32. winding part; 321. first arc-shaped recessed part; 322. second arc-shaped recessed part; 33. second connecting part; 34. first fixing part; 35. second fixing part; 36. third fixing part; 37. first bending part; 38. second bending part; 4. hinge cap; 41. opening; 42. first connecting plate; 43. second connecting plate; 5. torque transmission component; 6. limiting column; 61. limiting boss; 7. elastic member. DETAILED DESCRIPTION

[0040] In order to make the purpose, features, and advantages of this patent more obvious and easy to understand, the technical solutions in the embodiments of this patent will be clearly and completely described below in conjunction with the drawings in the embodiments of this patent. Obviously, the described embodiments are only part of the embodiments of this patent, not all of them. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this patent.

[0041] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the swing mechanism provided by the embodiment of the present patent includes a hinge base 1, a swing arm 2 and a flexible circuit board 3; the hinge base 1 is formed with a hinge shaft 11, and the swing arm 2 is rotatably connected to the hinge shaft 11 so that the swing arm 2 can switch between an unfolded state and a folded state. The hinge base 1 is formed with a scroll 12, and the scroll 12 is spaced apart from the hinge shaft 11; the extension direction of the scroll 12 is consistent with the extension direction of the hinge shaft 11. Optionally, the scroll 12 is spaced apart from the hinge base 1; optionally, the hinge base 1 includes a first surface, the first surface is provided with a hinge shaft 11 and a scroll 12, the hinge shaft 11 and the scroll 12 are spaced apart, and the hinge shaft 11 and the scroll 12 are spaced apart on the first surface.

[0042] The flexible circuit board 3 includes a first connection portion 31, a winding portion 32 and a second connection portion 33 which are connected in sequence, and the winding portion 32 can bend with the swing of the swing arm 2; the first connection portion 31 is connected to the hinge base 1, and the second connection portion 33 is connected to the swing arm 2. Optionally, the first connection portion 31 and the hinge base 1 can be bonded or connected by a fastener; the second connection portion 33 and the swing arm 2 can be connected by bonding or by a fastener. The winding portion 32 can bend with the folding or unfolding of the swing arm 2, and is used to adapt to different positions of the swing arm 2 or different forms of the swing mechanism. Among them, the winding portion 32 is arranged between the hinge base 1 and the scroll 12, and the winding portion 32 is respectively wound on the outside of the hinge base 1 and the scroll 12. The reel 12 can play a supporting and guiding role, so that the shape of the flexible circuit board 3 is more stable when the swing mechanism is in the unfolded state, the folded state, and the switching between the unfolded state and the folded state, and the bending shape of the flexible circuit board 3 is controlled, which can avoid redundancy and pulling of the flexible circuit board 3, thereby improving the strength of the flexible circuit board 3 while ensuring the reliability of the deformation of the flexible circuit board 3, and further reducing the possibility of the flexible circuit board 3 being bent and failing during the dynamic bending process.

[0043] Optionally, the reel 12 is cylindrical, and the reel 12 can bend the flexible circuit board 3 and form an arc shape, so that the stress is evenly dispersed on the arc of the flexible circuit board 3, avoiding stress concentration on the flexible circuit board 3 and improving the life of the flexible circuit board 3.

[0044] In some specific embodiments, the swing mechanism further includes a hinge cap 4, which is sleeved on the hinge base 1 and fixed to the swing arm 2. Optionally, the hinge cap 4 and the hinge base 1 can be fixed by fasteners. A cavity for accommodating the winding portion 32 is formed between the hinge cap 4 and the hinge base 1. The cavity can limit the range of motion of the flexible circuit board 3, so that the winding portion 32 of the flexible circuit board 3 in the cavity has a compact structure. The cavity can also accommodate the deformation of the winding portion 32 when it bends with the swing of the swing arm 2. The side wall of the hinge cap 4 is provided with an opening 41, and at least part of the winding portion 32 extends from the opening 41 and is connected to the swing arm 2 through the second connecting portion 33.

[0045] In some specific embodiments, the winding portion 32 includes multiple layers of FPC, which are stacked with gaps between two adjacent layers of FPC. During the unfolding and folding process of the swing mechanism, the flexible circuit board 3 can be guaranteed to have flexibility and meet the test of the swing mechanism swinging 30,000 times.

[0046] In some specific embodiments, the winding portion 32 is formed with a bending region in the region within the cavity, and the bending region can bend with the folding or unfolding of the swing arm 2, so as to adapt to different forms of the swing mechanism. Optionally, the bending region includes a first arc-shaped recessed portion 321 and a second arc-shaped recessed portion 322, and the winding portion 32 of the flexible circuit board 3 can be bent at the first arc-shaped recessed portion 321 or the second arc-shaped recessed portion 322, and the first arc-shaped recessed portion 321 or the second arc-shaped recessed portion 322 can bend the winding portion 32 and form an arc-shaped circular arc shape, so that the stress is evenly dispersed on the circular arc of the winding portion 32, which can adapt to different forms of the swing mechanism and avoid the flexible circuit board 3 from being folded in half. Optionally, the bending region is wavy, so that the winding portion 32 of the flexible circuit board 3 can bend with the folding or unfolding of the arm, so as to adapt to different forms of the swing arm 2 and avoid the flexible circuit board 3 from being folded in half.

[0047] Combination Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the hinge base 1 includes a first side surface 111 and a second side surface 112, the scroll 12 is located on one side of the first side surface 111 or the second side surface 112, and a portion of the flexible circuit board 3 is connected to the first side surface 111 to form a first fixing portion 34. Optionally, the flexible circuit board 3 is bonded to the first side surface 111, which can reduce the possibility of redundancy of the flexible circuit board 3 during dynamic bending. A portion of the flexible circuit board 3 is connected to the second side surface 112 to form a second fixing portion 35. Optionally, the flexible circuit board 3 is bonded to the second side surface 112, which can reduce the possibility of redundancy of the flexible circuit board 3 during dynamic bending. The area of ​​the flexible circuit board 3 between the first fixing portion 34 and the second fixing portion 35 forms a first bending portion 37, which can reduce the possibility of damage to the flexible circuit board 3 due to pulling.

[0048] Optionally, the hinge base 1 includes a first side 111 and a second side 112, the scroll 12 is located on one side of the first side 111 or the second side 112, and a portion of the flexible circuit board 3 is connected to the first side 111 to form a first fixed portion 34, which can reduce the possibility of irregular deformation or pulling of the flexible circuit board 3 and achieve control of the bending shape of the flexible circuit board 3.

[0049] Optionally, the hinge base 1 includes a first side 111 and a second side 112, the scroll 12 is located on one side of the first side 111 or the second side 112, and a portion of the flexible circuit board 3 is connected to the second side 112 to form a second fixed portion 35, which can reduce the possibility of irregular deformation or pulling of the flexible circuit board 3 and achieve control of the bending shape of the flexible circuit board 3.

[0050] Optionally, the hinge base 1 includes a first side surface 111 and a second side surface 112, the scroll 12 is located on one side of the first side surface 111 or the second side surface 112, part of the flexible circuit board 3 is connected to the first side surface 111 to form a first fixed portion 34, and part of the flexible circuit board 3 is connected to the second side surface 112 to form a second fixed portion 35, and the area of ​​the flexible circuit board 3 between the first fixed portion 34 and the second fixed portion 35 forms a first bending portion 37, which can reduce the possibility of irregular deformation or pulling of the flexible circuit board 3 and realize the control of the bending shape of the flexible circuit board 3.

[0051] In some specific embodiments, the opening 41 is provided with a first connecting plate 42 and a second connecting plate 43. Optionally, the first connecting plate 42 and the second connecting plate 43 can be fixedly connected to the hinge cap 4 respectively; optionally, the first connecting plate 42 and the second connecting plate 43 are an integrated structure with the hinge cap 4. At least one of the first connecting plate 42 and the second connecting plate 43 is fixedly connected to the swing arm 2, which can improve the stability of the swing arm 2. When the swing arm 2 swings, the hinge cap 4 can be driven to rotate around the hinge shaft 11. Optionally, the first connecting plate 42 or the second connecting plate 43 is connected to the swing arm 2 by a fastener. A channel for the winding portion 32 to extend is formed between the first connecting plate 42 and the second connecting plate 43. When the swing arm 2 swings, the hinge cap 4 rotates around the hinge shaft 11, and the swing arm 2 drives the second connecting part 33 of the flexible circuit board 3. The first connecting plate 42 or the second connecting plate 43 pushes the winding part 32 so that the winding part 32 can bend and form an arc shape and be wound on the outside of the reel 12, so that the stress is evenly dispersed on the winding part 32 of the flexible circuit board 3, avoiding stress concentration on the flexible circuit board 3 and improving the life of the flexible circuit board 3.

[0052] In some specific embodiments, the first connecting plate 42 is connected to a portion of the flexible circuit board 3 to form a third fixing portion 36. Optionally, the flexible circuit board 3 is bonded to the first connecting plate 42, and a second bending portion 38 is formed between the third fixing portion 36 and the second fixing portion 35. This can reduce the possibility of redundancy of the flexible circuit board 3 during dynamic bending, and can reduce the possibility of damage to the flexible circuit board 3 due to pulling.

[0053] In some specific embodiments, the swing arm 2 includes a rotating seat 21 and a support plate 22, the rotating seat 21 is provided with a mounting hole, the mounting hole is sleeved on the hinge shaft 11, the support plate 22 is connected to the second connecting portion 33, and optionally, the support plate 22 is connected to the second connecting portion 33 by a fastener. Optionally, the hinge shaft 11 is penetrated with a torque transmission component 5. Optionally, the torque transmission component 5 can be a torque plate. Optionally, the torque plate includes a connecting hole, the hinge shaft 11 is penetrated in the connecting hole, the torque plate is connected to the swing arm 2, and the relative friction between the hinge shaft 11 and the connecting hole is used to provide a damping force when the swing arm 2 and the hinge shaft 11 rotate relative to each other.

[0054] In some specific embodiments, the hinge base 1 is provided with a mounting groove 13, and the mounting groove 13 includes a first end and a second end 131 that are arranged oppositely, the first end is far away from the rotating seat 21 of the swing arm 2, and the second end 131 is close to the rotating seat 21 of the swing arm 2, the first end is provided with a first limiting hole 132, and the second end 131 is provided with a second limiting hole 133, and the mounting groove 13 is provided with a limiting column 6, one end of the limiting column 6 is penetrated through the first limiting hole 132, and the other end is penetrated through the second limiting hole 133; the limiting column 6 is provided with a limiting boss 61 in the area where the limiting column 6 is located in the mounting groove 13, and the elastic member 7 is arranged on the limiting column 6 and is located between the first end and the limiting boss 61, one end of the elastic member 7 abuts against the first end of the mounting groove 13, and the other end abuts against the limiting boss 61, so that the limiting column 6 abuts against the rotating seat 21. When the elastic member 7 is a spring, the spring is sleeved on the limiting column 6.

[0055] The elastic member 7 limits the movement of the limit column 6 in the direction away from the rotating seat 21. The limit column 6, the mounting groove 13 and the elastic member 7 cooperate with each other to form a torque limitation. When the torque does not exceed the limit value, the elastic member 7 applies pressure to the rotating seat 21; when the torque exceeds the limit value, the limit column 6 and the rotating seat 21 slip, allowing the swing arm 2 to swing, thereby improving the stability of the swing arm 2 when in use.

[0056] The electronic device provided by the embodiment of the present disclosure includes the swing mechanism provided by the embodiment of the present disclosure. Since the electronic device provided by the embodiment of the present disclosure has the same advantages as the swing mechanism provided by the embodiment of the present disclosure, they will not be described in detail here.

[0057] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this patent can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this patent can be achieved, and this document does not limit it here.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this patent, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0059] The above are only specific implementations of this patent, but the protection scope of this patent is not limited to this. Any technician familiar with this technical field can easily think of changes or substitutions within the technical scope disclosed in this patent, which should be covered by the protection scope of this patent. Therefore, the protection scope of this patent should be based on the protection scope of the claims.

Claims

1. A swing mechanism, characterized in that: include: A hinge base (1), a swing arm (2) and a flexible circuit board (3); The hinge base (1) is formed with a hinge shaft (11), and the swing arm (2) is rotatably connected to the hinge shaft (11), so that the swing arm (2) can switch between an unfolded state and a folded state; The hinge base (1) is formed with a scroll (12), and the scroll (12) is arranged at a distance from the hinge shaft (11); the extension direction of the scroll (12) is consistent with the extension direction of the hinge shaft (11); The flexible circuit board (3) comprises a first connecting portion (31), a winding portion (32) and a second connecting portion (33) which are connected in sequence, the first connecting portion (31) being connected to the hinge base (1), the second connecting portion (33) being connected to the swing arm (2), and the winding portion (32) being able to bend as the swing arm (2) swings; The winding portion (32) is arranged between the hinge shaft (11) and the hinge base (1), and the winding portion (32) is respectively wound around the outside of the hinge base (1) and the winding shaft (12).

2. The swing mechanism according to claim 1, characterized in that: It also comprises a hinge cap (4), the hinge cap (4) being sleeved on the hinge base (1) and fixed to the swing arm (2), a cavity for accommodating the winding portion (32) being formed between the hinge cap (4) and the hinge base (1), a side wall of the hinge cap (4) being provided with an opening (41), and the winding portion (32) extending out from the opening (41); And / or, the winding portion (32) includes multiple layers of FPC, the multiple layers of FPC are stacked, and a gap is provided between two adjacent layers of FPC.

3. The swing mechanism according to claim 2, characterized in that: The area of ​​the winding portion (32) located in the cavity forms a bending area.

4. The swing mechanism according to claim 3, characterized in that: The bending area comprises a first arc-shaped recessed portion (321) and a second arc-shaped recessed portion (322); And / or, the bending area is wavy.

5. The swing mechanism according to claim 2, characterized in that: The hinge base (1) comprises a first side surface (111) and a second side surface (112), the scroll (12) is located on one side of the first side surface (111) or the second side surface (112), a portion of the flexible circuit board (3) is connected to the first side surface (111) to form a first fixing portion (34), or a portion of the flexible circuit board (3) is connected to the second side surface (112) to form a second fixing portion (35); Alternatively, the hinge base (1) comprises a first side surface (111) and a second side surface (112), the scroll (12) is located on one side of the first side surface (111) or the second side surface (112), a portion of the flexible circuit board (3) is connected to the first side surface (111) to form a first fixing portion (34), a portion of the flexible circuit board (3) is connected to the second side surface (112) to form a second fixing portion (35), and an area of ​​the flexible circuit board (3) located between the first fixing portion (34) and the second fixing portion (35) forms a first bending portion (37).

6. The swing mechanism according to claim 5, characterized in that: The opening (41) is provided with a first connecting plate (42) and a second connecting plate (43), at least one of the first connecting plate (42) and the second connecting plate (43) is fixedly connected to the swing arm (2), and a channel for the winding portion (32) to extend is formed between the first connecting plate (42) and the second connecting plate (43).

7. The swing mechanism according to claim 6, characterized in that: The first connecting plate (42) is connected to a portion of the flexible circuit board (3) to form a third fixing portion (36), and a second bending portion (38) is formed between the third fixing portion (36) and the second fixing portion (35).

8. The swing mechanism according to claim 1, characterized in that: The swing arm (2) comprises a rotating seat (21) and a support plate (22), the rotating seat (21) is provided with a mounting hole, the mounting hole is sleeved on the hinge shaft (11), and the support plate (22) is connected to the second connecting portion (33); And / or, the hinge shaft (11) is provided with a torque transmission component (5).

9. The swing mechanism according to claim 8, characterized in that: The hinge base (1) is provided with a mounting groove (13), the mounting groove (13) comprising a first end and a second end (131) arranged opposite to each other, the first end being away from the rotating seat (21), the second end (131) being close to the rotating seat (21) of the swing arm (2), the first end being provided with a first limiting hole (132), and the second end (131) being provided with a second limiting hole (133); The mounting groove (13) is provided with a limiting column (6), one end of the limiting column (6) is passed through the first limiting hole (132), and the other end is passed through the second limiting hole (133); The limiting column (6) is provided with a limiting boss (61) in the region where the limiting column (6) is located in the mounting groove (13); the elastic member (7) is arranged on the limiting column (6) and is located between the first end portion and the limiting boss (61); One end of the elastic member (7) abuts against the first end of the mounting groove (13), and the other end abuts against the limiting boss (61), so that the limiting column (6) abuts against the rotating seat (21).

10. An electronic device, characterized in that: It comprises the swing mechanism as claimed in any one of claims 1 to 9.

Images