Hinge assembly and electronic equipment

Abstract

The invention discloses a hinge assembly and electronic equipment, and relates to the technical field of hinges. The hinge assembly is applied to the electronic equipment, a first equipment body and a second equipment body of the electronic equipment are rotationally connected through the hinge assembly, the hinge assembly comprises a limiting swing arm, a base, a synchronous shaft, a door plate and a synchronous swing arm, the synchronous shaft is arranged on the base, and the limiting swing arm and the synchronous swing arm are rotationally arranged on the synchronous shaft in a sleeving mode and arranged at intervals. The limiting swing arms are in sliding fit with the door plates, the door plates comprise the first door plate and the second door plate, the first door plate is used for being connected with the first equipment body, the second door plate is used for being connected with the second equipment body, and under the condition that the electronic equipment is in a folded state, the limiting swing arms are in limiting fit with the door plates. The first door plate and the second door plate are prevented from approaching each other; when the electronic equipment is in an unfolded state, the limiting swing arm is in limiting fit with the door plate, so that the first door plate and the second door plate are located in the same plane.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a hinge assembly and an electronic device. Background Art

[0002] With the development of communication technology and the improvement of user needs, electronic devices have become an important tool in people's daily life and work, and foldable electronic devices are popular because they take up less space and are easy to carry. Foldable electronic devices usually include a display screen, a device body and a hinge assembly. The device body is used to support the display screen, and the device body can be switched between an unfolded state and a folded state through a hinge assembly.

[0003] In actual applications, when a foldable electronic device is in a folded state and falls, the synchronous swing arm of the hinge assembly will be misaligned with the device body due to inertia, causing the display screen to be squeezed and damaged, thereby greatly shortening the service life of the display screen; and, when the foldable electronic device is in an unfolded state, due to the poor structural stability of the device body, some structures (such as door panels) may be arched, resulting in poor flatness of the display surface of the display screen. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a hinge assembly and an electronic device, which can solve the problems of short service life of display screens of current electronic devices and poor flatness of the display surface.

[0005] In order to solve the above technical problems, this application is implemented as follows: In a first aspect, the present application provides a hinge assembly, which is applied to an electronic device, wherein a first device body and a second device body of the electronic device are rotatably connected via the hinge assembly, and is characterized in that the hinge assembly comprises a limit swing arm, a base, a synchronization shaft, a door panel and a synchronization swing arm, wherein the synchronization shaft is arranged on the base, the limit swing arm and the synchronization swing arm can be rotatably mounted on the synchronization shaft, and the two are arranged at intervals, the limit swing arm and the synchronization swing arm both slide in cooperation with the door panel along the width direction of the door panel, the number of the door panels is at least two, including a first door panel and a second door panel, the first door panel is used to connect the first device body, and the second door panel is used to connect the second device body, When the electronic device is in a folded state, the limit swing arm cooperates with the door panel in the upper limit direction of the thickness of the door panel to prevent the first door panel and the second door panel from approaching each other; when the electronic device is in an unfolded state, the limit swing arm cooperates with the door panel in the upper limit direction of the thickness of the door panel to make the first door panel and the second door panel located in the same plane.

[0006] In a second aspect, the present application provides an electronic device, comprising a first device body, a second device body, a display screen and the above-mentioned hinge assembly, wherein a first end of the display screen is connected to the first device body, a second end of the display screen is connected to the second device body, and the first device body is rotatably connected to the second device body through the hinge assembly; During the relative rotation of the first device body and the second device body, the electronic device switches between an unfolded state and a folded state.

[0007] In an embodiment of the present application, the hinge assembly includes a limit swing arm, a base, a synchronization shaft, a door panel and a synchronization swing arm. The synchronization shaft is arranged on the base. The limit swing arm and the synchronization swing arm can be rotatably mounted on the synchronization shaft, and the two are arranged at intervals. The limit swing arm and the door panel slide together along the width direction of the door panel. The number of door panels is at least two, including a first door panel and a second door panel. The first door panel is used to connect the first device body, and the second door panel is used to connect the second device body. When the electronic device is in a folded state, the limit swing arm and the slide groove are limited in the thickness direction of the door panel to prevent the first door panel and the second door panel from approaching each other; when the electronic device is in an unfolded state, the limit swing arm and the slide groove are limited in the thickness direction of the door panel to make the first door panel and the second door panel located in the same plane.

[0008] Compared with the prior art, the present solution adds a limit swing arm. When the electronic device is in a folded state and falls, once the door panel tends to tilt, the limit swing arm cooperates with the door panel to limit the position in the thickness direction of the door panel to prevent the door panel from tilting, thereby preventing the first door panel and the second door panel from approaching each other, thereby avoiding squeezing the display screen to protect the display screen, which is beneficial to extending the service life of the display screen; when the electronic device is in an unfolded state and the door panel tends to arch, the limit swing arm cooperates with the door panel to limit the position in the thickness direction of the door panel to avoid arching of the door panel, so that the first door panel and the second door panel are located in the same plane, and accordingly the first end and the second end of the display screen of the electronic device are located in the same plane, thereby improving the flatness of the display surface of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 An exploded view of a portion of the structure of the device body disclosed in the embodiment of the present application; Figure 2 for Figure 1 A partial enlarged view of the structure shown; Figure 3 to Figure 4 It is a schematic diagram of the structure of the hinge assembly disclosed in the embodiment of the present application at different viewing angles; Figure 5 A schematic diagram of a partial structure of an electronic device in a folded state disclosed in an embodiment of the present application; Figure 6 A cross-sectional view of a partial structure of an electronic device in a folded state disclosed in an embodiment of the present application; Figure 7 for Figure 6 A partial enlarged view of the structure shown; Figure 8 A cross-sectional view of a partial structure of an electronic device disclosed in an embodiment of the present application in an unfolded state; Fig. 9 for Figure 8 A partial enlarged view of the structure shown; Fig.10 A cross-sectional view of a partial structure of an electronic device in a folded state disclosed in an embodiment of the present application; Fig.11 This is a schematic diagram of the structure of the door panel disclosed in the embodiment of the present application; Fig.12 It is a schematic structural diagram of the first arm body disclosed in the embodiment of the present application; Fig.13 It is a schematic structural diagram of the second arm disclosed in the embodiment of the present application; Fig.14 A schematic top view of an electronic device in an unfolded state disclosed in an embodiment of the present application; Fig.15 This is a side view of the electronic device disclosed in an embodiment of the present application in an unfolded state.

[0010] Description of reference numerals: 100-first device body; 200-second device body; 300-display screen; 400-hinge assembly, 410-limiting swing arm, 411-first arm body, 411a-first connecting part, 411a1-first limiting surface, 411a2-first annular part, 411a3-first arc-shaped part, 411a4-third limiting surface, 411b-third connecting part, 411c-connecting plate, 411c1-first plate segment, 411c2-second plate segment, 411d-annular connecting part, 412-second arm body, 412a-second connecting part, 412a1-second limiting surface, 412a2-second annular part, 412a3-second arc-shaped part, 412a4-fourth limiting surface, 412b-guide plate, 413-connecting shaft, 420-base Seat, 430-synchronizing shaft, 440-door panel, 441-first slide groove, 442-avoidance opening, 443-plate body, 444-first protrusion, 444a-first part, 444b-second part, 445-second protrusion, 446-first arc guide rail, 447-second positioning surface, 448-door panel driving slide groove, 450-synchronizing swing arm, 451-first positioning surface, 460-virtual swing arm, 470-virtual swing arm bracket, 480-middle frame fixed bracket, 481-second arc guide rail, 482-second slide groove, 491-gear shaft, 492-gear, 493-cam, 494-circlip, 495-fixed bracket, 496-spring. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0012] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0013] The hinge assembly and electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0014] like Figures 1 to 13As shown, an embodiment of the present application discloses a hinge assembly, which is applied to an electronic device, wherein a first device body 100 and a second device body 200 of the electronic device are rotatably connected via the hinge assembly, a first end of a display screen 300 of the electronic device is connected to the first device body 100, and a second end of the display screen 300 is connected to the second device body 200, and during relative rotation of the first device body 100 and the second device body 200, the two drive the display screen 300 to unfold or fold, thereby switching the electronic device between an unfolded state and a folded state.

[0015] The hinge assembly includes a limit swing arm 410, a base 420, a synchronous shaft 430, a door panel 440 and a synchronous swing arm 450. The synchronous shaft 430 is arranged on the base 420. The limit swing arm 410 and the synchronous swing arm 450 can be rotatably sleeved on the synchronous shaft 430, and the two are arranged at intervals. The limit swing arm 410 and the door panel 440 are slidably matched along the width direction of the door panel 440. Optionally, the hinge assembly also includes a middle frame fixing bracket 480, the synchronous swing arm 450 is slidably matched with the middle frame fixing bracket 480, and the door panel 440 is provided with a first arc guide rail 446. , the middle frame fixing bracket 480 is provided with a second arc guide rail 481, and the door panel 440 and the middle frame fixing bracket 480 are slidably matched through the first arc guide rail 446 and the second arc guide rail 481; further, the synchronous swing arm 450 is provided with a boss, the boss is provided with a first positioning surface 451, and the door panel 440 is provided with a second positioning surface 447. When the electronic device is in a folded state, the second positioning surface 447 is positioned and matched with the first positioning surface 451 to reduce the inertial displacement of the door panel 440, thereby reducing the impact of the door panel 440 on the display screen 300. Optionally, the middle frame fixing bracket 480 is provided with a second slide groove 482, and the synchronous swing arm 450 is slidably matched with the middle frame fixing bracket 480 through the second slide groove 482, so that the synchronous swing arm 450 slides along a preset direction.

[0016] The number of the door panels 440 is at least two, including a first door panel and a second door panel. The first door panel is used to connect the first device body 100 , and the second door panel is used to connect the second device body 200 .

[0017] It should be noted that the width direction of the door panel 440 specifically refers to the direction in which the first end of the display screen 300 extends toward the second end when the electronic device is in the unfolded state.

[0018] When the electronic device is in a folded state, the limit swing arm 410 cooperates with the door panel 440 in the upper limit direction of the thickness of the door panel 440 to prevent the first door panel and the second door panel from approaching each other; when the electronic device is in an unfolded state, the limit swing arm 410 cooperates with the door panel 440 in the upper limit direction of the thickness of the door panel 440 to make the first door panel 440 and the second door panel 440 located in the same plane.

[0019] In the embodiment of the present application, compared with the prior art, the present solution adds a limit swing arm 410. When the electronic device is in a folded state and falls, once the door panel 440 shows a tilting tendency, the limit swing arm 410 cooperates with the door panel 440 in the upper limit position in the thickness direction of the door panel 440 to prevent the door panel 440 from tilting, thereby preventing the first door panel and the second door panel from approaching each other, thereby avoiding squeezing the display screen 300 to protect the display screen 300, which is beneficial to prolonging the service life of the display screen 300; when the electronic device is in an unfolded state and the door panel 440 (the first door panel and / or the second door panel) shows a tendency to arch, the limit swing arm 410 cooperates with the door panel 440 in the upper limit position in the thickness direction of the door panel 440 to avoid arching of the door panel 440, so that the first door panel and the second door panel are located in the same plane, and accordingly, the first end and the second end of the display screen 300 of the electronic device are located in the same plane, thereby improving the flatness of the display surface of the display screen 300.

[0020] It should be noted that the above-mentioned first door panel and the second door panel being located in the same plane specifically means that the support surfaces of the first door panel and the second door panel facing the display screen 300 are located in the same plane; during the switching of the electronic device between the folded state and the unfolded state, the limit swing arm 410 does not impose too many constraints on the movement, and the door panel 440 rotates according to the movement trajectory of the synchronous swing arm 450 and the virtual swing arm 460, but the door panel 440 will drive the limit swing arm 410 to rotate to a certain angle. Optionally, the rotation angle of the limit swing arm 410 can be between 60 and 80°, and of course it can also be adjusted according to actual needs. The embodiment of the present application does not impose specific restrictions on this.

[0021] In an optional embodiment, the door panel 440 is provided with a first slide groove 441 extending along the width direction thereof. Optionally, the notch of the first slide groove 441 can be opened on the side of the door panel 440 . The limiting swing arm 410 includes a first arm body 411, a second arm body 412 and a connecting shaft 413. The first end of the first arm body 411 is rotatably mounted on the synchronization shaft 430. The second end of the first arm body 411 is provided with a first connecting portion 411a. The first end of the second arm body 412 is provided with a second connecting portion 412a. At least a portion of the second arm body 412 is slidably matched with the first slide groove 441. One end of the connecting shaft 413 passes through the first connecting portion 411a and the second connecting portion 412a in sequence to rotatably connect the first arm body 411 with the second arm body 412. The first connecting portion 411a is provided with a first limiting surface 411a1, and the second connecting portion 412a is provided with a second limiting surface 412a1. When the electronic device is in a folded state, the first limiting surface 411a1 and the second limiting surface 412a1 are limitedly matched along the circumferential direction of the connecting shaft 413.

[0022] When the electronic device is in the folded state, the second arm 412 cooperates with the door panel 440 in the thickness direction of the door panel 440 to limit the rotation of the door panel 440; further, when the second arm 412 has a tendency to rotate relative to the first arm 411, the first limiting surface 411a1 of the first arm 411 cooperates with the second limiting surface 412a1 of the second arm 412 along the circumferential limit of the connecting shaft 413, thereby preventing the second arm 412 from rotating relative to the first arm 411, so as to ensure the limiting stability of the limiting swing arm 410, so that the second arm 412 cooperates with the door panel 440 in the thickness direction of the door panel 440 more stably, thereby further improving the stability of the first door panel and the second door panel. Of course, the above-mentioned first limiting surface 411a1 and the second limiting surface 412a1 may also not be set, and the first arm 411 and the second arm 412 may be limited by friction.

[0023] It should be noted that in the above embodiment, when the second arm 412 cooperates with the door panel 440 in the upper limit direction of the door panel 440, the second arm 412 specifically cooperates with the side wall of the first slide groove 441 away from the display screen 300 of the electronic device to limit the rotation of the door panel 440 and prevent the door panel 440 from approaching the display screen 300 and squeezing the display screen 300.

[0024] Optionally, the end surfaces opposite to each other of the first connecting portion 411a and the second connecting portion 412a may be provided with cam surfaces, the cam surface of the first connecting portion 411a is provided with a first limiting surface 411a1, and the cam surface of the second connecting portion 412a is provided with a second limiting surface 412a1 for limiting cooperation; or, in other optional embodiments, the first connecting portion 411a includes a first annular portion 411a2 and a first arcuate portion 411a3 which are arranged and connected along the axial direction of the connecting shaft 413, the first arcuate portion 411a3 is provided with the above-mentioned first limiting surface 411a1, and the second connecting portion 412a includes a second annular portion 411a2 which is arranged and connected along the axial direction of the connecting shaft 413 Part 412a2 and the second arc-shaped part 412a3, the second arc-shaped part 412a3 is provided with the above-mentioned second limiting surface 412a1, the second arc-shaped part 412a3 and the first arc-shaped part 411a3 are arranged along the circumference of the connecting shaft 413, and the sum of the arc length of the second arc-shaped part 412a3 and the arc length of the first arc-shaped part 411a3 is less than 2π, the second arc-shaped part 412a3 and the first arc-shaped part 411a3 are both located between the second annular part 412a2 and the first annular part 411a2, one end of the connecting shaft 413 passes through the first annular part 411a2 and the second annular part 412a2 in sequence, so that the first arm body 411 is rotatably connected with the second arm body 412.

[0025] In the above scheme, the second arc portion 412a3 of the second connecting portion 412a and the first arc portion 411a3 of the first connecting portion 411a are arranged along the circumferential direction of the connecting shaft 413, and the sum of the arc length of the second arc portion 412a3 and the arc length of the first arc portion 411a3 is less than 2π. At this time, there is a certain distance between the second arc portion 412a3 and the first arc portion 411a3 in the circumferential direction of the connecting shaft 413, thereby providing a certain movement space for the second arc portion 412a3 and the first arc portion 411a3; and, the first arc portion 411a3 is provided with a first limiting surface 411a1, and the second arc portion 412a3 is provided with a second limiting surface 412a1. When the first limiting surface 411a1 and the second limiting surface 412a1 are limitedly matched, the contact area between the two is large, and the limiting stability is good, which is conducive to further improving the relative stability between the first arm body 411 and the second arm body 412.

[0026] In another optional embodiment, the door panel 440 is provided with a first slide groove 441 extending along the width direction thereof. Optionally, the notch of the first slide groove 441 can be opened on the side of the door panel 440 . The limiting swing arm 410 includes a first arm body 411, a second arm body 412 and a connecting shaft 413. The first end of the first arm body 411 is rotatably mounted on the synchronization shaft 430. The second end of the first arm body 411 is provided with a first connecting portion 411a. The first end of the second arm body 412 is provided with a second connecting portion 412a. At least a portion of the second arm body 412 is slidably matched with the first slide groove 441. One end of the connecting shaft 413 passes through the first connecting portion 411a and the second connecting portion 412a in sequence to enable the first arm body 411 to be rotatably connected with the second arm body 412. The first connecting portion 411a is provided with a third limiting surface 411a4, and the second connecting portion 412a is provided with a fourth limiting surface 412a4. When the electronic device is in the unfolded state, the third limiting surface 411a4 is limitedly matched with the fourth limiting surface 412a4 in the circumferential direction of the connecting shaft 413.

[0027] When the electronic device is in the unfolded state, the second arm 412 cooperates with the door panel 440 in the thickness direction of the door panel 440 to limit the arching of the door panel 440; further, when the second arm 412 has a tendency to rotate relative to the first arm 411, the third limiting surface 411a4 of the first arm 411 cooperates with the fourth limiting surface 412a4 of the second arm 412 along the circumferential limit of the connecting shaft 413, thereby preventing the second arm 412 from rotating relative to the first arm 411, so as to ensure the limiting stability of the limiting swing arm 410, so that the second arm 412 cooperates with the door panel 440 in the thickness direction of the door panel 440 more stably, thereby further improving the stability of the first door panel and the second door panel. Of course, the third limiting surface 411a4 and the fourth limiting surface 412a4 mentioned above may also not be provided, and the first arm 411 and the second arm 412 may be limited by friction.

[0028] It should be noted that in the above embodiment, when the second arm 412 cooperates with the door panel 440 in the upper limit direction of the door panel 440, the second arm 412 specifically cooperates with the side wall of the first slide groove 441 away from the display screen 300 of the electronic device to limit the rotation of the door panel 440 and prevent the door panel 440 from approaching the display screen 300 and squeezing the display screen 300.

[0029] Optionally, in an embodiment in which the first connecting portion 411a includes a first annular portion 411a2 and a first arc-shaped portion 411a3 which are arranged and connected along the axial direction of the connecting shaft 413, and the second connecting portion 412a includes a second annular portion 412a2 and a second arc-shaped portion 412a3 which are arranged and connected along the axial direction of the connecting shaft 413, the first arc-shaped portion 411a3 is further provided with the above-mentioned third limiting surface 411a4, and the third limiting surface 411a4 and the first limiting surface 411a1 are arranged at intervals along the axial direction of the connecting shaft 413, and the second arc-shaped portion 412a3 is further provided with the above-mentioned fourth limiting surface 412a4, and the fourth limiting surface 412a4 and the second limiting surface 412a1 are arranged at intervals along the axial direction of the connecting shaft 413. When the electronic device is in the folded state, the first limiting surface 411a1 of the first arm 411 and the second limiting surface 412a1 of the second arm 412 cooperate with each other in the circumferential direction of the connecting shaft 413; when the electronic device is in the unfolded state, the third limiting surface 411a4 of the first arm 411 and the fourth limiting surface 412a4 of the second arm 412 cooperate with each other in the circumferential direction of the connecting shaft 413. In this solution, both the first connecting portion 411a and the second connecting portion 412a have a dual-purpose effect, which can more reliably prevent the second arm 412 and the first arm 411 from rotating relative to each other when the electronic device is in the folded state, thereby improving the stability of the first door panel and the second door panel, and can more reliably prevent the second arm 412 and the first arm 411 from rotating relative to each other when the electronic device is in the unfolded state, thereby improving the stability of the first door panel and the second door panel.

[0030] In a further optional embodiment, the first arm 411 includes a third connecting portion 411b, a connecting plate 411c and a first connecting portion 411a which are connected in sequence, and the third connecting portion 411b can be rotatably mounted on the synchronization shaft 430. Optionally, the plane where the third limiting surface 411a4 is located can form an acute angle with a side of the connecting plate 411c facing away from the display screen 300 of the electronic device. At this time, when the electronic device is in the unfolded state, the angle between the first arm 411 and the second arm 412 is also an acute angle; or, the third limiting surface 411a4 is flush with a side of the connecting plate 411c facing away from the display screen 300 of the electronic device. When the electronic device is in the unfolded state, the angle between the first arm 411 and the second arm 412 is 180°. In this solution, when the electronic device is in the unfolded state, since the third limiting surface 411a4 is flush with the side of the connecting plate 411c facing away from the display screen 300 of the electronic device, the angle between the first arm 411 and the second arm 412 is 180°, and the contact areas between the first arm 411 and the second arm 412 and the door panel 440 are respectively large, so that the limiting swing arm 410 has better support for the door panel 440, which is beneficial to improving the stability of the door panel 440; and when the third limiting surface 411a4 is flush with the side of the connecting plate 411c facing away from the display screen 300 of the electronic device, the processing and manufacturing of the first arm 411 can be facilitated.

[0031] In an optional embodiment, the connecting plate 411c includes a first plate segment 411c1 and a second plate segment 411c2 connected to each other. The thickness of the first plate segment 411c1 and the second plate segment 411c2 may be equal, or the thickness of the first plate segment 411c1 is less than the thickness of the second plate segment 411c2. The first connecting portion 411a is connected to the first plate segment 411c1, and the third connecting portion 411b is connected to the second plate segment 411c2. The first plate segment 411c1 can be slidably matched with the first slide groove 441. When the electronic device is in the unfolded state, the first plate segment 411c1 is located in the first slide groove 441. In this solution, the thickness of the first plate segment 411c1 is set to be smaller, which can reduce the space occupied by it in the thickness direction of the door panel 440; while the thickness of the second plate segment 411c2 is set to be larger, which can ensure the structural strength of the connection between the connecting plate 411c and the third connecting portion 411b, and avoid the breakage during the rotation of the first arm 411 around the synchronous shaft 430.

[0032] Optionally, in any of the above embodiments, the second end of the first arm body 411 is also provided with an annular connecting portion 411d, and the annular connecting portion 411d and the first connecting portion 411a are arranged axially at intervals along the connecting shaft 413, and one end of the connecting shaft 413 passes through the first connecting portion 411a, the second connecting portion 412a and the annular connecting portion 411d in sequence, so that the first arm body 411 is rotatably connected with the second arm body 412. By providing the annular connecting portion 411d, the contact area between the first arm 411 and the connecting shaft 413 can be increased, thereby improving the connection stability of the first arm 411; and the second connecting portion 412a is located between the annular connecting portion 411d and the annular connecting portion 411d of the first connecting portion 411a, so that the forces acting on the first arm 411 and the second arm 412 are distributed more evenly in the width direction of the position-limiting swing arm 410, thereby preventing any of the first arm 411 and the second arm 412 from tilting in the width direction of the position-limiting swing arm 410, which is conducive to improving the stability of the position-limiting swing arm 410. Of course, the above-mentioned annular connecting portion 411d may not be provided.

[0033] In another optional embodiment, when the electronic device is in the folded state, the length of the portion of the second arm 412 located in the first slide groove 441 in the sliding direction thereof is 2 to 5 mm, that is, the second arm 412 and the door panel 440 have a certain overlap when the electronic device is in the folded state, so as to ensure the stability of the position-limiting cooperation between the two. Of course, if the above-mentioned overlap (that is, the length of the portion of the second arm 412 located in the first slide groove 441 in the sliding direction thereof) is too large, the length of the first slide groove 441 needs to be set longer in order to accommodate the position-limiting swing arm 410 when the electronic device is in the unfolded state, which will result in a larger width of the door panel 440; if the above-mentioned overlap is too small, this will affect the position-limiting stability between the position-limiting swing arm 410 and the door panel 440 when the electronic device is in the folded state.

[0034] Optionally, in any of the above embodiments, the door panel 440 is further provided with an avoidance opening 442, which is connected to the first slide groove 441, and the avoidance opening 442 extends to a side of the door panel 440 that is away from the display screen 300 of the electronic device, and the width of the avoidance opening 442 is smaller than the width of the first slide groove 441, and the second arm body 412 includes a connected guide plate 412b and the above-mentioned second connecting portion 412a, in a direction perpendicular to the guide plate 412b, the thickness of the guide plate 412b is smaller than the thickness of the second connecting portion 412a, and in the axial direction of the connecting shaft 413, the length of the guide plate 412b is greater than the length of the second connecting portion 412a, and when the electronic device is in the unfolded state, a portion of the second connecting portion 412a is located in the avoidance opening 442. During the sliding cooperation between the limiting swing arm 410 and the first slide groove 441, part of the second connection part 412a of the second arm body 412 is located in the avoidance opening 442, which can set the size of the second connection part 412a to be larger, thereby facilitating the setting of the second limiting surface 412a1 or the fourth limiting surface 412a4 and the connecting hole for the second connection part 412a to cooperate with the connecting shaft 413; at the same time, since one end of the connecting shaft 413 passes through the first connection part 411a and the second connection part 412a in sequence to make the first arm body 411 and the second arm body 412 rotatably connected, then during the sliding cooperation between the limiting swing arm 410 and the first slide groove 441, part of the first connection part 411a of the first arm body 411 is also located in the avoidance opening 442, which can also set the size of the first connection part 411a to be larger, thereby facilitating the setting of the first limiting surface 411a1 or the third limiting surface 411a4 and the connecting hole for the first connection part 411a to cooperate with the connecting shaft 413. Of course, the avoidance opening 442 may not be provided, and in this case, the cross-sectional shape of the first sliding groove 441 may be annular.

[0035] In a further optional embodiment, the door panel 440 includes a panel body 443, and the first slide groove 441 and the avoidance opening 442 can be opened on the panel body 443; or, the door panel 440 also includes a first protrusion 444 and a second protrusion 445, and the first protrusion 444 and the second protrusion 445 are both arranged on a side of the panel body 443 away from the display screen 300 of the electronic device, and the first protrusion 444 and the second protrusion 445 are arranged at intervals along the length direction of the hinge assembly 400, and the first protrusion 444 and the second protrusion 445 both include a connected first protrusion 444 and a second protrusion 445. The first part 444a is bent relative to the second part 444b, the first part 444a is connected to the plate body 443, and the second part 444b is opposite to the plate body 443. In the length direction of the hinge assembly 400, the first part 444a of the first protrusion 444 is opposite to the first part 444a of the second protrusion 445 to form a first slide groove 441, and the second part 444b of the first protrusion 444 is opposite to the second part 444b of the second protrusion 445 to form an escape opening 442. In this solution, the first protrusion 444 and the second protrusion 445 are arranged on the plate body 443 to form the first slide groove 441 and the escape opening 442. At this time, the thickness of the plate body 443 can be set to be smaller, thereby reducing the weight of the hinge assembly, thereby meeting the demand for thin and light electronic equipment.

[0036] Optionally, the hinge assembly further includes a virtual swing arm 460 and a virtual swing arm bracket 470, the limit swing arm 410 is arranged between the synchronous swing arm 450 and the virtual swing arm 460, one end of the virtual swing arm 460 cooperates with the bearing of the base 420, and the other end of the virtual swing arm 460 is slidably matched with the middle frame fixed bracket 480, the virtual swing arm bracket 470 is arranged above the virtual swing arm 460, and is connected to the base 420 by screws, the first end of the synchronous swing arm 450 is sleeved on the synchronous shaft 430, and the other end is slidably connected with the middle frame fixed bracket 480, the middle frame fixed bracket 480 can slide on the slide rail of the synchronous swing arm 450, and the angle of the middle frame fixed bracket 480 is determined by the synchronous swing arm. The arm 450 is controlled, and the position of the middle frame fixed bracket 480 on the slide rail of the synchronous swing arm 450 is controlled by the virtual swing arm 460. One end of the door panel 440 cooperates with the bearing of the middle frame fixed bracket 480 (that is, the first curved guide rail 446 and the second curved guide rail 481 slide together) to realize the angle change of the door panel 440. The other end of the door panel 440 is rotatably connected with the virtual swing arm 460 through the door panel driving slide groove 448 through the connecting rod shaft. When the middle frame fixed bracket 480 drives the door panel 440 to slide on the virtual swing arm 460, the positional relationship between the door panel 440-the connecting rod shaft-the virtual swing arm 460 is used to drive the door panel 440 to form the required angle in the folded state.

[0037] The hinge assembly 400 also includes a gear shaft 491, a gear 492, a cam 493, a retaining spring 494, a fixed bracket 495 and a spring 496. The gear shaft 491 is arranged on the base 420. The gear shaft 491 and the synchronous shaft 430 are arranged side by side. The gear 492 is sleeved on the gear shaft 491. The cam 493 and the retaining spring 494 can be slidably sleeved on the synchronous shaft 430. The synchronous swing arm 450 cooperates with the cam 493 and is limited by the retaining spring 494. The fixed bracket 495 is arranged at the end of the base 420. The ends of the gear shaft 491 and the synchronous shaft 430 are both connected to the fixed bracket 495. The gear shaft 491 and the synchronous shaft 430 are both sleeved with a spring 496. One end of the spring 496 abuts against the fixed bracket 495. The spring 496 is used to provide damping force.

[0038] like Figure 14 to Figure 15 As shown, based on the hinge assembly disclosed in the embodiment of the present application, the embodiment of the present application also discloses an electronic device, which includes a first device body 100, a second device body 200, a display screen 300 and the hinge assembly 400 described in any of the above embodiments, the first end of the display screen 300 is connected to the first device body 100, the second end of the display screen 300 is connected to the second device body 200, and the first device body 100 is rotatably connected to the second device body 200 through the hinge assembly 400; during the relative rotation of the first device body 100 and the second device body 200, the electronic device switches between an unfolded state and a folded state.

[0039] The electronic device disclosed in the embodiments of the present application may be a smart phone, a tablet computer, an e-book reader, a wearable device (such as a smart watch), an electronic game console, or other electronic device. The embodiments of the present application do not impose any specific restrictions on the type of electronic device.

[0040] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A hinge assembly, applied to an electronic device, wherein a first device body and a second device body of the electronic device are rotatably connected via the hinge assembly, characterized in that: The hinge assembly includes a limit swing arm, a base, a synchronization shaft, a door panel and a synchronization swing arm, wherein the synchronization shaft is arranged on the base, the limit swing arm and the synchronization swing arm can be rotatably sleeved on the synchronization shaft, and the two are arranged at intervals, the limit swing arm and the door panel are slidably matched along the width direction of the door panel, the number of the door panels is at least two, including a first door panel and a second door panel, the first door panel is used to connect the first device body, and the second door panel is used to connect the second device body, When the electronic device is in a folded state, the limit swing arm cooperates with the door panel in the upper limit direction of the thickness of the door panel to prevent the first door panel and the second door panel from approaching each other; when the electronic device is in an unfolded state, the limit swing arm cooperates with the door panel in the upper limit direction of the thickness of the door panel to make the first door panel and the second door panel located in the same plane.

2. The hinge assembly according to claim 1, characterized in that: The door panel is provided with a first slide groove extending along its width direction, and the limit swing arm includes a first arm body, a second arm body and a connecting shaft, the first end of the first arm body is rotatably sleeved on the synchronization shaft, the second end of the first arm body is provided with a first connecting portion, the first end of the second arm body is provided with a second connecting portion, at least a part of the second arm body is slidably matched with the first slide groove, one end of the connecting shaft passes through the first connecting portion and the second connecting portion in sequence, so that the first arm body is rotatably connected with the second arm body, the first connecting portion is provided with a first limiting surface, and the second connecting portion is provided with a second limiting surface. When the electronic device is in the folded state, the first limiting surface cooperates with the second limiting surface in a circumferential limiting manner along the connecting axis.

3. The hinge assembly according to claim 2, characterized in that: The first connecting portion includes a first annular portion and a first arc-shaped portion which are arranged and connected along the axial direction of the connecting shaft, the first arc-shaped portion is provided with the first limiting surface, the second connecting portion includes a second annular portion and a second arc-shaped portion which are arranged and connected along the axial direction of the connecting shaft, the second arc-shaped portion is provided with the second limiting surface, the second arc-shaped portion and the first arc-shaped portion are arranged circumferentially along the connecting shaft, and the sum of the arc length of the second arc-shaped portion and the arc length of the first arc-shaped portion is less than 2π, the second arc-shaped portion and the first arc-shaped portion are both located between the second annular portion and the first annular portion, and one end of the connecting shaft passes through the first annular portion and the second annular portion in sequence, so that the first arm body is rotatably connected with the second arm body.

4. The hinge assembly according to claim 1, characterized in that: The door panel is provided with a first slide groove extending along its width direction, and the limit swing arm includes a first arm body, a second arm body and a connecting shaft, the first end of the first arm body is rotatably sleeved on the synchronization shaft, the second end of the first arm body is provided with a first connecting portion, the first end of the second arm body is provided with a second connecting portion, at least a part of the second arm body is slidably matched with the first slide groove, one end of the connecting shaft passes through the first connecting portion and the second connecting portion in sequence, so that the first arm body is rotatably connected with the second arm body, the first connecting portion is provided with a third limit surface, and the second connecting portion is provided with a fourth limit surface. When the electronic device is in the unfolded state, the third limiting surface and the fourth limiting surface are in limiting cooperation with each other in the circumferential direction of the connecting axis.

5. The hinge assembly according to claim 4, characterized in that: The first arm body comprises a third connecting portion, a connecting plate and the first connecting portion which are connected in sequence, the third connecting portion is rotatably sleeved on the synchronization shaft, and the third limiting surface is flush with a side of the connecting plate which faces away from the display screen of the electronic device. When the electronic device is in the unfolded state, the angle between the first arm and the second arm is 180°.

6. The hinge assembly according to claim 5, characterized in that: The connecting plate includes a first plate segment and a second plate segment connected to each other, the thickness of the first plate segment is smaller than the thickness of the second plate segment, the first connecting portion is connected to the first plate segment, the third connecting portion is connected to the second plate segment, and the first plate segment can be slidably matched with the first sliding groove. When the electronic device is in the unfolded state, the first plate segment is located in the first sliding groove.

7. The hinge assembly according to claim 2 or 4, characterized in that: The second end of the first arm body is also provided with an annular connecting portion, and the annular connecting portion and the first connecting portion are arranged at intervals along the axial direction of the connecting shaft. One end of the connecting shaft passes through the first connecting portion, the second connecting portion and the annular connecting portion in sequence, so that the first arm body is rotatably connected with the second arm body.

8. The hinge assembly according to claim 2, characterized in that: When the electronic device is in the folded state, the length of the portion of the second arm body located in the first sliding groove in the sliding direction of the second arm body is 2-5 mm.

9. The hinge assembly according to claim 2 or 4, characterized in that: The door panel is further provided with an avoidance opening, the avoidance opening is communicated with the first slide slot, the avoidance opening extends to a side of the door panel away from the display screen of the electronic device, and the width of the avoidance opening is smaller than the width of the first slide slot. The second arm body comprises a connected guide plate and the second connecting portion, in a direction perpendicular to the guide plate, the thickness of the guide plate is smaller than the thickness of the second connecting portion, and in an axial direction of the connecting shaft, the length of the guide plate is larger than the length of the second connecting portion, When the electronic device is in the unfolded state, part of the second connecting portion is located in the avoidance opening.

10. The hinge assembly according to claim 9, characterized in that: The door panel comprises a panel body, a first protruding portion and a second protruding portion, wherein the first protruding portion and the second protruding portion are both arranged on a side of the panel body away from the display screen, and the first protruding portion and the second protruding portion are arranged at intervals along the length direction of the hinge assembly. The first protrusion and the second protrusion each include a first part and a second part that are connected, the first part is bent relative to the second part, the first part is connected to the plate body, and the second part is opposite to the plate body, and in the length direction of the hinge assembly, the first part of the first protrusion is opposite to the first part of the second protrusion to form the first sliding groove, and the second part of the first protrusion is opposite to the second part of the second protrusion to form the avoidance opening.

11. An electronic device, characterized in that: The device comprises a first device body, a second device body, a display screen, and a hinge assembly according to any one of claims 1 to 10, wherein a first end of the display screen is connected to the first device body, a second end of the display screen is connected to the second device body, and the first device body is rotatably connected to the second device body via the hinge assembly; During the relative rotation of the first device body and the second device body, the electronic device switches between an unfolded state and a folded state.

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