Hinge assembly and electronic device

Abstract

This application discloses a hinge assembly and an electronic device, relating to the field of hinge technology. The hinge assembly includes a hinge base, swing arms, and a display screen support. The first ends of the swing arms on both sides of the hinge base are rotatably connected to the hinge base via pivots. Each swing arm's first end is provided with a gear. The display screen support is provided with a transmission rack extending along the thickness direction of the hinge base. The swing arms on both sides of the hinge base rotate synchronously via the gears and the transmission rack. During the rotation of the swing arms relative to the hinge base, the gears drive the display screen support to move along the thickness direction of the hinge base via the transmission rack.

Description

Technical Field

[0001] This application belongs to the field of hinge technology, specifically relating to a hinge assembly and an electronic device. Background Technology

[0002] In recent years, foldable electronic devices have gained an increasingly larger market share, with their larger display area and convenient portability attracting more and more users. Foldable electronic devices include a flexible display screen, a first frame, a second frame, and a hinge assembly. The hinge assembly is located at the point where the first frame meets the second frame and is connected to both the first and second frames, allowing the electronic device to switch between an unfolded and folded state.

[0003] Currently, the hinge assembly uses synchronized gears to engage the swing arms on both sides of the hinge base, enabling synchronous movement of the swing arms during the switching between folded and unfolded states of the electronic device. Simultaneously, a display support is positioned above the hinge base. When the electronic device is unfolded, it supports the display screen, thus mitigating creases. When the electronic device is folded, the display support descends to increase the hinge assembly's accommodating space, better accommodating the display screen and also mitigating creases. However, the display support and swing arms require multiple connecting components to provide driving force for the display support's movement, resulting in a relatively complex hinge assembly structure. Summary of the Invention

[0004] The purpose of this application is to provide a hinge assembly and an electronic device that can solve the problem of the relatively complex structure of current hinge assemblies.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, this application provides a hinge assembly for use in electronic devices, including a hinge base, a swing arm, and a display support; The first ends of the swing arms on both sides of the hinge base are rotatably connected to the hinge base via a rotating shaft. Each swing arm has a gear at its first end. The display screen support has a transmission rack extending along the thickness direction of the hinge base. The swing arms on both sides of the hinge base rotate synchronously through the gear and the transmission rack. During the rotation of the swing arms relative to the hinge base, the gear drives the display screen support to move along the thickness direction of the hinge base through the transmission rack.

[0006] Secondly, this application also provides an electronic device, including a first frame, a second frame, a display screen and the aforementioned hinge assembly, wherein the first frame is connected to the second frame via the hinge assembly, a first end of the display screen is connected to the first frame, and a second end of the display screen is connected to the second frame; During the relative rotation of the first frame and the second frame, the electronic device switches between an unfolded state and a folded state; when the electronic device is in the unfolded state, part of the display screen is supported by the display screen support.

[0007] In this embodiment, a transmission rack is provided on the display screen support to replace the synchronous gears in the prior art. Gears are provided on both sides of the hinge base, and each gear meshes with the transmission rack. This establishes a transmission connection between the swing arms on both sides of the hinge base and the transmission rack, thereby achieving synchronous rotation of the swing arms on both sides of the hinge base. Furthermore, during the rotation of the swing arms relative to the hinge base, the gears on the swing arms drive the display screen support to move along the thickness direction of the hinge base via the transmission rack, thus avoiding obstruction of the display screen of the electronic device or the display screen supporting the electronic device. In other words, by providing a transmission rack on the display screen support, this application can achieve both synchronous rotation of the swing arms on both sides of the hinge base and drive the display screen support to move along the thickness direction of the hinge base. This avoids the need for additional components between the display screen support and the swing arms, greatly simplifying the structure of the hinge assembly and reducing its design complexity and manufacturing cost. Therefore, this embodiment can solve the problem of the relatively complex structure of current hinge assemblies. Attached Figure Description

[0008] Figure 1 This is an exploded view of a portion of the hinge assembly disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of a portion of the structure of the hinge assembly disclosed in an embodiment of this application; Figure 3 This is a side view of a portion of the structure of the hinge assembly disclosed in an embodiment of this application; Figure 4 This is an exploded view of the swing arm and transmission mechanism disclosed in the embodiments of this application; Figure 5 This is a schematic diagram of the swing arm and transmission mechanism disclosed in the embodiments of this application; Figure 6 This is a cross-sectional view of a portion of the structure of the hinge assembly disclosed in an embodiment of this application; Figure 7 This is a cross-sectional view of a portion of the hinge assembly in a folded state as disclosed in an embodiment of this application; Figure 8This is a cross-sectional view of a portion of the hinge assembly disclosed in this application in its unfolded state. Wherein, the first arrow line M1 indicates the rotation direction of the swing arm, the second arrow line M2 indicates the rotation direction of the second rotating component, and the third arrow line M3 indicates the rotation direction of the first rotating component.

[0009] Explanation of reference numerals in the attached figures: 100 - Hinge base, 110 - Receiving groove; 200 - swing arm, 210 - gear, 220 - connecting rod; 300 - Display screen support, 310 - Transmission rack, 311 - First boss, 311a - First driving surface, 311b - Second driving surface, 311c - First connecting plane, 320 - Support plate; 400 - Installation components; 500 - Boss seat, 510 - Second boss, 511 - Third driving surface, 512 - Fourth driving surface, 513 - Second connecting plane; 600 - Elastic damping element; 700 - Frame connector; 800-Transmission mechanism, 810-First rotating component, 820-Second rotating component, 821-Helical guide groove, 830-Base, 831-Mounting groove; 900 - Rotary shaft, 910 - First rotating shaft. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0011] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0012] The hinge assembly and electronic device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0013] like Figures 1 to 8 As shown in the figure, this application discloses a hinge assembly applied to an electronic device. The hinge assembly includes a hinge base 100, a swing arm 200, and a display support 300. Optionally, the swing arm 200 in this application can be a synchronous swing arm.

[0014] The first ends of the swing arms 200 on both sides of the hinge base 100 are rotatably connected to the hinge base 100 via a pivot 900. Optionally, the pivot 900 in this application can be a synchronous shaft, or the pivot 900 can be rotatably mounted on the hinge base 100, with the first end of the swing arm 200 fixedly sleeved on the pivot 900. In this case, the swing arm 200 and the pivot 900 can rotate together relative to the hinge base 100. Alternatively, the pivot 900 can be fixedly mounted on the hinge base 100, with the swing arm 200 rotatably sleeved on the pivot 900, and the swing arm 200 can rotate around the pivot 900 relative to the hinge base 100. Each swing arm 200 has a gear 210 at its first end, and the display screen support 300 has a transmission rack 310 extending along the thickness direction of the hinge base 100. That is, when the hinge base 100 is placed on a horizontal surface, the transmission rack 310 extends in the vertical direction.

[0015] The swing arms 200 on both sides of the hinge base 100 rotate synchronously via gears 210 and a transmission rack 310. Specifically, the gears 210 of the first swing arm on the first side of the hinge base 100 and the second swing arm on the second side of the hinge base 100 both mesh with the transmission rack 310 to achieve synchronous rotation of the first and second swing arms. During the rotation of the swing arms 200 relative to the hinge base 100, the gears 210 drive the display screen support 300 to move along the thickness direction of the hinge base 100 via the transmission rack 310. In other words, during the rotation of the first and second swing arms relative to the hinge base 100, the gears 210 of the first swing arm on the first side of the hinge base 100 and the second swing arm on the second side of the hinge base 100 both drive the display screen support 300 to rise and fall along the thickness direction of the hinge base 100 via the transmission rack 310.

[0016] In this embodiment, a transmission rack 310 is provided on the display support 300 to replace the synchronous gear in the prior art. The swing arms 200 on both sides of the hinge base 100 are provided with gears 210, and each gear 210 meshes with the transmission rack 310 so that the swing arms 200 on both sides of the hinge base 100 establish a transmission connection relationship with the transmission rack 310 through the gears 210, thereby realizing the synchronous rotation of the swing arms 200 on both sides of the hinge base 100. On this basis, during the rotation of the swing arm 200 relative to the hinge base 100, the gears 210 on the swing arm 200 drive the display support 300 to move along the thickness direction of the hinge base 100 through the transmission rack 310, so as to avoid the display screen of the electronic device or the display screen supporting the electronic device. In other words, by providing a transmission rack 310 on the display support 300, this application can achieve synchronous rotation of the swing arms 200 on both sides of the hinge base and drive the display support 300 to move along the thickness direction of the hinge base 100. This avoids the need for additional components between the display support 300 and the swing arms 200, greatly simplifying the structure of the hinge assembly and reducing its design complexity and manufacturing cost. Therefore, the embodiments of this application can solve the problem of the relatively complex structure of current hinge assemblies.

[0017] In one optional embodiment, during the folding process of the swing arm 200 relative to the hinge base 100, the gear 210 drives the display support 300 to move in the direction toward the hinge base 100 via the transmission rack 310 to avoid the display screen of the electronic device; during the unfolding process of the swing arm 200 relative to the hinge base 100, the gear 210 drives the display support 300 to move in the direction away from the hinge base 100 via the transmission rack 310 to support the display screen of the electronic device.

[0018] Specifically, during the process of switching the electronic device from the unfolded state to the folded state, the swing arm 200 drives the display support 300 to descend relative to the hinge base 100 via the gear 210 and the transmission rack 310, so that the display support 300 is close to the hinge base 100 to avoid the display screen of the electronic device. At this time, the swing arms 200 on both sides of the hinge base 100 and the display support 300 form a large screen-accommodating space, and the bent part of the display screen is located within the screen-accommodating space, thereby improving the crease of the bent part of the display screen. During the process of switching the electronic device from the folded state to the unfolded state, the swing arm 200 drives the display support 300 to rise relative to the hinge base 100 via the gear 210 and the transmission rack 310, so that the display support 300 is close to and supports the bent part of the display screen of the electronic device, thereby supporting the display screen of the electronic device and improving the crease of the bent part of the display screen.

[0019] In another optional embodiment, the pivot 900 includes a first pivot 910 and a second pivot disposed on the hinge base 100. The first pivot 910 and the second pivot are spaced apart along the width direction of the hinge base 100. The first ends of the swing arms 200 on both sides of the hinge base 100 are rotatably connected to the hinge base 100 through the first pivot 910 and the second pivot, respectively. Optionally, the hinge assembly also includes a mounting member 400, which is disposed on the hinge base 100. The first pivot 910 and the second pivot are rotatably connected to the hinge base 100 through the mounting member 400. The display support 300 includes a connected support plate 320 and the aforementioned transmission rack 310. The transmission rack 310 is located on the side of the support plate 320 away from the display screen of the electronic device. A portion of the transmission rack 310 is located between the first pivot 910 and the second pivot. When the electronic device is in the unfolded state, the support plate 320 supports the display screen. When the electronic device is in the folded state, the swing arms 200 on both sides of the hinge base 100 and the support plate 320 form a screen-accommodating space. In this design, the portion of the transmission rack 310 is positioned between the first pivot 910 and the second pivot. In the width direction of the hinge base 100, the transmission rack 310 is located in the middle of the support plate 320. This allows for a more balanced force distribution on the display support 300, thereby improving its stability. In addition, the portion of the transmission rack 310 can utilize the space between the first pivot 910 and the second pivot, resulting in a smaller overall space occupied by the transmission rack 310. This helps to reduce the thickness of the hinge assembly, thereby achieving a thinner and lighter electronic device.

[0020] In another optional embodiment, the hinge assembly further includes a boss seat 500 and an elastic damping element 600, both of which are sleeved on the pivot 900. The elastic damping element 600 is used to provide damping force for the hinge assembly. One end of the elastic damping element 600 is connected to the boss seat 500, and the other end is connected to the hinge base 100. Optionally, the elastic damping element 600 can be connected to the hinge base 100 through a mounting member 400.

[0021] Optionally, the end face of the gear 210 may be provided with a first cam portion, which can cooperate with a second cam portion on the boss seat 500; or, the transmission rack 310 is provided with a first boss 311, and the boss seat 500 is provided with a second boss 510, with the first boss 311 and the second boss 510 cooperating to deform the elastic damping element 600 through the boss seat 500. During the movement of the transmission rack 310 along the thickness direction of the hinge base 100, the first boss 311 moves together with the transmission rack 310 along the thickness direction of the hinge base 100, and the first boss 311 and the second boss 510 cooperate to drive the boss seat 500 to move relative to the hinge base 100, thereby deforming the elastic damping element 600 through the boss seat 500. This solution uses a transmission rack 310 with a first boss 311, so that the transmission rack 310 cooperates with the boss seat 500 to drive the elastic damping element 600 to deform. This arrangement simplifies the structure of the swing arm 200, thus facilitating the processing and manufacturing of the swing arm 200.

[0022] In a further optional embodiment, both the first boss 311 and the second boss 510 are strip-shaped structures extending along the width direction of the hinge base 100. In this case, the first boss 311 of the transmission rack 310 engages with the second boss 510 of the boss seat 500, resulting in a large contact area between them. This reduces wear between the first boss 311 and the second boss 510, thereby extending the service life of the rocker arm 200 and the boss seat 500. Of course, the first boss 311 and the second boss 510 can also be block structures.

[0023] In an optional embodiment, the display support 300 includes a connected support plate 320 and a transmission rack 310. The transmission rack 310 is located on the side of the support plate 320 facing away from the display screen of the electronic device. The first boss 311 is provided with a first driving surface 311a and a second driving surface 311b. Optionally, both the first driving surface 311a and the second driving surface 311b can be arc-shaped surfaces. The first driving surface 311a is located between the support plate 320 and the second driving surface 311b. The second boss 510 is provided with a third driving surface 511 and a fourth driving surface 512. Optionally, both the third driving surface 511 and the fourth driving surface 512 can be arc-shaped surfaces. The third driving surface 511 is located between the support plate 320 and the fourth driving surface 512. When the electronic device is in a folded state, the first driving surface 311a cooperates with the fourth driving surface 512. When the electronic device is in an unfolded state, the second driving surface 311b cooperates with the third driving surface 511. During the process of switching the electronic device from a folded state to an unfolded state, the first boss 311 drives the boss seat 500 to slide relative to the hinge base 100 through the first driving surface 311a and the fourth driving surface 512, so as to deform the elastic damping element 600. During the process of switching the electronic device from an unfolded state to a folded state, the first boss 311 drives the boss seat 500 to slide relative to the hinge base 100 through the second driving surface 311b and the third driving surface 511, so as to deform the elastic damping element 600.

[0024] In this design, the first protrusion 311 and the second protrusion 510 are configured as described above. This allows the driving surfaces on the first protrusion 311 and the second protrusion 510 to both drive the electronic device during the switching between folded and unfolded states, ensuring the damping effect of the elastic damping element 600, and guide it, thereby improving the movement flexibility of the swing arm 200 and the transmission rack 310. Of course, in other embodiments, the driving structure and guiding structure between the first protrusion 311 and the second protrusion 510 can also be configured separately.

[0025] Optionally, the curvature of the first driving surface 311a can be equal to the curvature of the second driving surface 311b; the curvature of the third driving surface 511 can be equal to the curvature of the fourth driving surface 512; or, in other optional embodiments, the curvature of the first driving surface 311a is greater than the curvature of the second driving surface 311b; and the curvature of the third driving surface 511 is less than the curvature of the fourth driving surface 512. During the process of the electronic device switching from a folded state to an unfolded state, the first driving surface 311a with a larger curvature cooperates with the third driving surface 511. At this time, a larger driving force is required to unfold the electronic device, which is beneficial to improving the damping feel; and this setting can improve the stability of the electronic device in the folded state.

[0026] Optionally, the first boss 311 is further provided with a first connecting plane 311c, which connects the first driving surface 311a and the second driving surface 311b, and the first connecting plane 311c is parallel to the movement direction of the display support 300; the second boss 510 is further provided with a second connecting plane 513, which connects the third driving surface 511 and the fourth driving surface 512, and the second connecting plane 513 is parallel to the movement direction of the display support 300; when the electronic device is in a hovering state, the first connecting plane 311c and the second connecting plane 513 cooperate, and the contact area between the two is large, which is beneficial to improving the hovering stability of the electronic device.

[0027] In the existing technology, the virtual swing arm of the hinge assembly is a motion model that uses a virtual bearing and a circular rotation or a virtual bearing and a sliding groove to connect the hinge base 100 and the frame connector 700 for opening and closing movements. This connection and fit method has a large tolerance design, which can easily cause movement jamming. In addition, during the use of the hinge assembly, there is also a risk that the virtual swing arm will come off the bearing when the groove wears or falls.

[0028] Based on this, in an optional embodiment, the hinge assembly further includes a frame connector 700 and a transmission mechanism 800. The second end of the swing arm 200 is slidably connected to the frame connector 700. Optionally, the frame connector 700 may be provided with a sliding groove, and the second end of the swing arm 200 is slidably engaged with the sliding groove. The transmission mechanism 800 is disposed on one side of the swing arm 200. The first end of the transmission mechanism 800 is rotatably connected to the hinge base 100, and the second end of the transmission mechanism 800 is rotatably connected to the frame connector 700. The swing arm 200 is provided with a connecting rod 220, which is movably connected to the transmission mechanism 800 to drive the transmission mechanism 800 to move relative to the hinge base 100, thereby causing the transmission mechanism 800 to open and close the frame connector 700. In this solution, the transmission mechanism 800 can replace the virtual swing arm of the hinge assembly in the prior art. The frame connector 700 establishes a connection relationship with the hinge base 100 and the swing arm 200 through the transmission mechanism 800. During the switching between the folded state and the unfolded state of the electronic device, the swing arm 200 drives the transmission mechanism 800 to move relative to the hinge base 100 through the connecting rod 220, so that the transmission mechanism 800 drives the frame connector 700 to open and close. This can reduce the fit tolerance between the transmission mechanism 800 and the hinge base 100, thereby achieving precision transmission and reducing the risk of hinge assembly jamming. In addition, the overall connection relationship of the transmission mechanism 800 is relatively simple, which can avoid the risk of wear and disengagement.

[0029] In a further optional embodiment, the transmission mechanism 800 includes a first rotating member 810 and a second rotating member 820. The first rotating member 810 is rotatably connected to the hinge base 100, the first end of the second rotating member 820 is rotatably connected to the frame connecting member 700, and the second end of the second rotating member 820 is rotatably connected to the first rotating member 810. Optionally, the first rotating member 810 and the hinge base 100, the second rotating member 820 and the frame connecting member 700, and the second rotating member 820 and the first rotating member 810 can all be rotatably connected by a shaft-hole fit. The connecting rod 220 is movably connected to the second rotating member 820, wherein the rotation axis of the first rotating member 810 is parallel to the rotation axis of the swing arm 200, and the rotation axis of the second rotating member 820 intersects the rotation axis of the first rotating member 810. In this design, the second rotating component 820 can both rotate independently and rotate together with the first rotating component 810 around the rotation axis of the swing arm 200. This allows the swing arm 200 to drive the frame connector 700 to open and close via the connecting rod 220 and the second rotating component 820, thereby enabling the electronic device to switch between an unfolded and folded state. Rotary connections are used between the first rotating component 810 and the hinge base 100, between the second rotating component 820 and the frame connector 700, and between the second rotating component 820 and the first rotating component 810 in the transmission mechanism 800. This minimizes the tolerances between the components, further enhancing the precision transmission effect.

[0030] Optionally, the connecting rod 220 can be sleeved with the second rotating member 820 via a slider to achieve rotational engagement between the two; or, in other optional embodiments, the second rotating member 820 is a rotating rod with a spiral guide groove 821 on its circumferential surface, and one end of the connecting rod 220 engages with the spiral guide groove 821 to drive the second rotating member 820 to rotate relative to the frame connecting member 700. This solution uses the connecting rod 220 engaging with the second rotating member 820 via the spiral guide groove 821, which simplifies the engagement structure between the connecting rod 220 and the second rotating member 820 and makes this engagement method more flexible. Furthermore, since the second rotating member 820 needs to drive the frame connecting member 700 to perform opening and closing movements, the second rotating member 820 needs to have a certain structural strength. Therefore, the second rotating member 820 can be made relatively thick, which facilitates the opening of the spiral guide groove 821. Simultaneously, the connecting rod 220 can be made relatively thin to facilitate engagement with the spiral guide groove 821.

[0031] Optionally, the end of the connecting rod 220 may be provided with an arc-shaped surface, which slides in conjunction with the spiral guide groove 821 to improve the sliding flexibility between the two and reduce wear between them.

[0032] Optionally, the rotation center axis of the second rotating member 820 can be perpendicular to the rotation center axis of the first rotating member 810, that is, the angle between the rotation center axis of the second rotating member 820 and the rotation center axis of the first rotating member 810 is a right angle. Since a straight line is the shortest distance, when the rotation center axis of the second rotating member 820 is perpendicular to the rotation center axis of the first rotating member 810, this can reduce the length of the second rotating member 820 and facilitate the connection between the connecting rod 220 and the second rotating member 820. Of course, the angle between the rotation center axis of the second rotating member 820 and the rotation center axis of the first rotating member 810 can also be an acute angle.

[0033] In another optional embodiment, the transmission mechanism 800 further includes a base 830, which is disposed on the hinge base 100. Optionally, the base 830 can be fixed to the hinge base 100 by welding, screw connection, or other methods. The base 830 is provided with a mounting groove 831, and a first rotating member 810 is disposed in the mounting groove 831, rotatably connected to the side wall of the mounting groove 831. In this solution, before assembling the hinge assembly, the various components of the transmission mechanism 800 can be modularized to improve the assembly efficiency of the hinge assembly. Of course, the base 830 can also be omitted, in which case the first rotating member 810 can be directly rotatably connected to the hinge base 100.

[0034] In another optional embodiment, the area of ​​the longitudinal section of the first rotating member 810 gradually decreases in the first direction, that is, the first rotating member 810 has a tapered structure in the first direction, where the first direction is the direction in which the frame connector 700 extends towards the hinge base 100, and the longitudinal section is perpendicular to the first direction, specifically the section perpendicular to the rotation center axis of the first rotating member 810. This solution sets the first rotating member 810 to the above structure, which avoids interference between the bottom of the first rotating member 810 and the hinge base 100 during the rotation of the first rotating member 810 relative to the hinge base 100, thereby improving the rotational flexibility of the first rotating member 810.

[0035] Optionally, the hinge base 100 is provided with a receiving groove 110, and part of the transmission rack 310 can be located in the receiving groove 110. In this case, the transmission rack 310 can be set to be longer to ensure the structural strength of the transmission rack 310, while avoiding the transmission rack 310 occupying a large additional space in the thickness direction of the hinge base 100, thereby reducing the thickness of the hinge assembly.

[0036] Based on the hinge assembly disclosed in the embodiments of this application, this application also discloses an electronic device, which includes a first frame, a second frame, a display screen, and the hinge assembly described in any of the above embodiments. The first frame is connected to the second frame via the hinge assembly. Optionally, the first frame can be rotatably connected to a first swing arm of the hinge assembly, and the second frame can be rotatably connected to a second swing arm of the hinge assembly. The first end of the display screen is connected to the first frame, and the second end of the display screen is connected to the second frame. During the relative rotation of the first frame and the second frame, the electronic device switches between an unfolded state and a folded state. When the electronic device is in the unfolded state, part of the display screen is supported by the display screen support member 300.

[0037] Optionally, the number of the aforementioned hinge components can be at least two. Along the length of the electronic device, the hinge components are arranged sequentially at intervals, and the FPC flexible flat cable can pass through the adjacent hinge components to electrically connect with the motherboard of the electronic device.

[0038] The electronic devices disclosed in this application can be smartphones, tablets, e-book readers, wearable devices (such as smartwatches, video game consoles, etc.). This application does not specifically limit the types of electronic devices.

[0039] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A hinge assembly used in electronic devices, characterized in that, Includes hinge base, swing arm, and display support; The first ends of the swing arms on both sides of the hinge base are rotatably connected to the hinge base via a rotating shaft. Each swing arm has a gear at its first end. The display screen support has a transmission rack extending along the thickness direction of the hinge base. The swing arms on both sides of the hinge base rotate synchronously through the gear and the transmission rack. During the rotation of the swing arms relative to the hinge base, the gear drives the display screen support to move along the thickness direction of the hinge base through the transmission rack.

2. The hinge assembly according to claim 1, characterized in that, During the folding process of the swing arm relative to the hinge base, the gear drives the display support to move in the direction toward the hinge base through the transmission rack, so as to avoid the display screen of the electronic device; During the unfolding of the swing arm relative to the hinge base, the gear drives the display support to move in a direction away from the hinge base via the transmission rack, so as to support the display screen of the electronic device.

3. The hinge assembly according to claim 1, characterized in that, The pivot includes a first pivot and a second pivot disposed on the hinge base. The first pivot and the second pivot are spaced apart along the width direction of the hinge base. The first ends of the swing arms on both sides of the hinge base are rotatably connected to the hinge base through the first pivot and the second pivot, respectively. The display screen support includes a connected support plate and a transmission rack. The transmission rack is located on the side of the support plate away from the display screen of the electronic device, and a portion of the transmission rack is located between the first pivot and the second pivot. When the electronic device is in the unfolded state, the support plate supports the display screen; when the electronic device is in the folded state, the swing arms on both sides of the hinge base and the support plate form a screen-accommodating space.

4. The hinge assembly according to claim 1, characterized in that, The hinge assembly further includes a boss seat and an elastic damping element. Both the boss seat and the elastic damping element are sleeved on the rotating shaft. One end of the elastic damping element is connected to the boss seat, and the other end is connected to the hinge base. The transmission rack is provided with a first boss, and the boss seat is provided with a second boss. The first boss and the second boss cooperate to deform the elastic damping element through the boss seat.

5. The hinge assembly according to claim 4, characterized in that, Both the first boss and the second boss are strip-shaped structures extending along the width direction of the hinge base.

6. The hinge assembly according to claim 4, characterized in that, The display screen support includes a connected support plate and a transmission rack. The transmission rack is located on the side of the support plate away from the display screen of the electronic device. The first boss has a first driving surface and a second driving surface. The first driving surface is located between the support plate and the second driving surface. The second boss has a third driving surface and a fourth driving surface. The third driving surface is located between the support plate and the fourth driving surface. When the electronic device is in a folded state, the first driving surface engages with the fourth driving surface; When the electronic device is in the unfolded state, the second driving surface cooperates with the third driving surface; during the process of the electronic device switching from the folded state to the unfolded state, the first boss drives the boss seat to slide relative to the hinge base through the first driving surface and the fourth driving surface, so as to deform the elastic damping element; during the process of the electronic device switching from the unfolded state to the folded state, the first boss drives the boss seat to slide relative to the hinge base through the second driving surface and the third driving surface, so as to deform the elastic damping element.

7. The hinge assembly according to claim 1, characterized in that, The hinge assembly also includes a frame connector and a transmission mechanism, and the second end of the swing arm is slidably connected to the frame connector. The transmission mechanism is located on one side of the swing arm. The first end of the transmission mechanism is rotatably connected to the hinge base, and the second end of the transmission mechanism is rotatably connected to the frame connector. The swing arm is provided with a connecting rod, which is movably connected to the transmission mechanism to drive the transmission mechanism to move relative to the hinge base, so that the transmission mechanism drives the frame connector to open and close.

8. The hinge assembly according to claim 7, characterized in that, The transmission mechanism includes a first rotating component and a second rotating component. The first rotating component is rotatably connected to the hinge base. A first end of the second rotating component is rotatably connected to the frame connecting component, and a second end of the second rotating component is rotatably connected to the first rotating component. The connecting rod is movably connected to the second rotating component. The rotation axis of the first rotating component is parallel to the rotation axis of the swing arm, and the rotation axis of the second rotating component intersects with the rotation axis of the first rotating component.

9. The hinge assembly according to claim 8, characterized in that, The second rotating component is a rotating rod, and a spiral guide groove is provided on the circumferential surface of the second rotating component. One end of the connecting rod cooperates with the spiral guide groove to drive the second rotating component to rotate relative to the frame connecting component.

10. The hinge assembly according to claim 8, characterized in that, The transmission mechanism further includes a base, which is disposed on the hinge base. The base has a mounting groove, and the first rotating member is disposed in the mounting groove and is rotatably connected to the side wall of the mounting groove.

11. The hinge assembly according to claim 8, characterized in that, In a first direction, the area of ​​the longitudinal section of the first rotating member gradually decreases, and the first direction is the direction in which the frame connector extends toward the hinge base, and the longitudinal section is perpendicular to the first direction.

12. An electronic device, characterized in that, The device includes a first frame, a second frame, a display screen, and a hinge assembly according to any one of claims 1 to 11, wherein the first frame is connected to the second frame via the hinge assembly, a first end of the display screen is connected to the first frame, and a second end of the display screen is connected to the second frame; During the relative rotation of the first frame and the second frame, the electronic device switches between an unfolded state and a folded state; when the electronic device is in the unfolded state, part of the display screen is supported by the display screen support.

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