Electronic device

Abstract

The utility model provides electronic equipment to solve the problem that the back of a flexible display part is lack of support. The electronic equipment comprises a hinge mechanism, a first bracket, a second bracket, a flexible display screen and a supporting mechanism, the hinge mechanism comprises a base body, a first rotating part and a second rotating part, the first rotating part and the second rotating part are movably connected with the two sides, away from each other, of the base body respectively, the first support is connected with the first rotating part, and the second rotating part is connected with the second support; the flexible display screen comprises a first display part, a flexible display part and a second display part which are connected in sequence, the first display part is arranged on the first support, the flexible display part is opposite to the hinge mechanism, and the second display part is arranged on the second support; the supporting mechanism comprises an ultrasonic motor and a supporting piece which are in driving connection, the supporting piece is located between the base body and the flexible display part, and the ultrasonic motor is used for driving the supporting piece to move in the direction close to or away from the base body; when the electronic device is in the unfolded state, the supporting piece abuts against the flexible display part.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and more particularly to an electronic device. Background Technology

[0002] With the continuous development of flexible display technology, some equipment manufacturers offer foldable electronic devices for users to choose from. Currently, the flexible display portion of the screen in foldable electronic devices generally has a recessed area on the back. It should be noted that the "flexible display portion" described here refers to the part of the screen that can bend and deform during the folding or unfolding of the electronic device. When the electronic device is in the folded state, the flexible display portion can be accommodated within the recessed area. Thus, when the electronic device is in the unfolded state, because the back of the flexible display portion is a recessed area, the back of the flexible display portion lacks support, resulting in more noticeable dents in the flexible display portion. Utility Model Content

[0003] This application provides an electronic device to address the problem of insufficient back support for flexible display units.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] The electronic device provided in this application includes: a hinge mechanism, a first bracket, a second bracket, a flexible display screen, and a support mechanism; the hinge mechanism includes a base, a first rotating member, and a second rotating member, the first rotating member and the second rotating member being movably connected to opposite sides of the base, the first bracket being connected to the first rotating member, and the second rotating member being connected to the second bracket; the flexible display screen includes a first display part, a flexible display part, and a second display part connected in sequence, the first display part being disposed on the first bracket, the flexible display part being opposite to the hinge mechanism, and the second display part being disposed on the second bracket; the support mechanism includes a driven ultrasonic motor and a support member, the support member being located between the base and the flexible display part, the ultrasonic motor being used to drive the support member to move toward or away from the base; when the electronic device is in an unfolded state, the support member abuts against the flexible display part.

[0006] Optionally, when the electronic device is in the unfolded state, the first bracket, the support member, and the second bracket are aligned with each other on the sides facing the flexible display screen.

[0007] Optionally, the ultrasonic motor is used to drive the support member to switch between a first extended position and a first retracted position; wherein, when the electronic device is in the unfolded state, the support member is located in the first extended position so that the support member abuts against the flexible display portion; when the electronic device is in the folded state, the support member is located in the first retracted position.

[0008] Optionally, the ultrasonic motor is used to drive the support member to switch between a second extended position and a second retracted position multiple times when the electronic device is in the extended state; wherein, when the support member is in the second extended position, the support member abuts against the flexible display portion so that the flexible display portion protrudes from the first display portion and the second display portion; and when the support member is in the second retracted position, the support member and the flexible display portion are spaced apart.

[0009] Optionally, the number of ultrasonic motors is at least two, and the at least two ultrasonic motors are spaced apart along the extension direction of the support member.

[0010] Optionally, the hinge mechanism further includes a Hall sensor; the Hall sensor is used to detect the opening and closing state of the hinge mechanism.

[0011] Optionally, the hinge mechanism further includes a magnetic element, one of the Hall sensor and the magnetic element being connected to the first rotating member, and the other being connected to the second rotating member or the base, wherein the magnetic element is located within the measurement range of the Hall sensor.

[0012] Optionally, the electronic device includes a current detection unit, which is electrically connected to the power supply circuit of the ultrasonic motor.

[0013] Optionally, the ultrasonic motor includes a stator and a mover, the stator being used to drive the mover to extend and slide, and the mover being connected to the support member.

[0014] Optionally, the stator is provided with a first through hole, and the ultrasonic motor further includes a first mating component and a second mating component. The first mating component and the second mating component are respectively provided on both sides of the stator along the extension direction of the first through hole. The first mating component is provided with a second through hole opposite to the first through hole, and the second mating component is provided with a third through hole opposite to the first through hole. The moving part is sequentially inserted through the third through hole, the first through hole and the second through hole, and the moving part is slidably connected to the hole wall of the third through hole and the hole wall of the second through hole respectively.

[0015] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects:

[0016] In the embodiments of this application, when the electronic device is in the unfolded state, the ultrasonic motor drives the support member to move away from the substrate, thereby causing the support member to come into contact with the flexible display unit. Therefore, the support member can be used to support the flexible display unit, thus solving the problem of insufficient support for the flexible display unit.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A partial schematic diagram of an electronic device in an unfolded state, provided as an embodiment of this application;

[0020] Figure 2 A partial schematic diagram of an electronic device in a folded state, provided as an embodiment of this application;

[0021] Figure 3 A schematic diagram of a support mechanism and a hinge mechanism in an unfolded state provided for an embodiment of this application;

[0022] Figure 4 A schematic diagram of a support mechanism and a hinge mechanism in a folded state provided for an embodiment of this application;

[0023] Figure 5 A schematic diagram of an ultrasonic motor and a hinge mechanism in an unfolded state provided for an embodiment of this application;

[0024] Figure 6 A schematic diagram showing the distribution of a substrate, an ultrasonic motor, and a support member as provided in an embodiment of this application;

[0025] Figure 7 A schematic diagram of a support mechanism provided in an embodiment of this application;

[0026] Figure 8 This is an exploded view of a support mechanism provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Electronic devices;

[0029] 100 - Hinge mechanism; 110 - Base; 120 - First rotating component; 130 - Second rotating component;

[0030] 200 - First stent;

[0031] 300 - Second support;

[0032] 400 - Flexible display screen; 410 - First display unit; 420 - Flexible display unit; 430 - Second display unit; 500 - Support mechanism;

[0033] 510 - Ultrasonic motor; 511 - Stator; 5111 - First through hole; 512 - Mover; 513 - First mating part; 5131 - Second through hole; 514 - Second mating part; 5141 - Third through hole; 520 - Support part;

[0034] 610 - Hall sensor; 620 - Magnetic component. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Furthermore, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application specification may have been selected by the applicant at his or her own discretion, and their detailed meanings are explained in the relevant sections of this description.

[0038] Furthermore, this application is required to be understood not only through the actual terms used, but also through the meaning implied by each term.

[0039] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0040] This application provides an electronic device. (See reference...) Figures 1 to 8 The electronic device 1 provided in this application embodiment includes: a hinge mechanism 100, a first bracket 200, a second bracket 300, a flexible display screen 400, and a support mechanism 500.

[0041] The hinge mechanism 100 includes a base 110, a first rotating member 120, and a second rotating member 130. The first rotating member 120 and the second rotating member 130 are movably connected to opposite sides of the base 110. A first support 200 is connected to the first rotating member 120, and the second rotating member 130 is connected to the second support 300.

[0042] The flexible display screen 400 includes a first display section 410, a flexible display section 420, and a second display section 430 connected in sequence. The first display section 410 is disposed on a first support 200, the flexible display section 420 is opposite to the hinge mechanism 100, and the second display section 430 is disposed on a second support 300. For example, the first display section 410 can be bonded to the first support 200, and the second display section 430 can be bonded to the second support 300. The flexible display section 420 can be bent and deformed as the electronic device 1 opens and closes.

[0043] The support mechanism 500 includes an ultrasonic motor 510 and a support member 520 connected for drive. The support member 520 is located between the base 110 and the flexible display unit 420, and the ultrasonic motor 510 is used to drive the support member 520 to move toward or away from the base 110. When the electronic device 1 is in the deployed state, the support member 520 abuts against the flexible display unit 420.

[0044] In this manner, in the embodiments of this application, when the electronic device 1 is in the unfolded state, the ultrasonic motor 510 drives the support member 520 to move away from the substrate 110, thereby causing the support member 520 to abut against the flexible display portion 420. Therefore, the support member 520 can be used to support the flexible display portion 420, thus avoiding the problem of the flexible display portion 420 lacking support.

[0045] In some embodiments, the first rotating member 120 and the second rotating member 130 are rotatably connected to opposite sides of the base 110. Alternatively, the first rotating member 120 includes a first rotating body and a first sliding body, the first rotating body being rotatably connected to the base 110, and the first sliding body being slidably connected to the first rotating body. The second rotating member 130 includes a second rotating body and a second sliding body, the second rotating body being rotatably connected to the base 110, and the second sliding body being slidably connected to the second rotating body. When the hinge mechanism 100 is switched to the folded state, the first sliding body slides relative to the first rotating body to a position away from the base 110, and the second sliding body slides relative to the second rotating body to a position away from the base 110, thereby increasing the size of the screen-accommodating space of the hinge mechanism 100.

[0046] refer to Figures 1 to 4 In the embodiments of this application, during the switching between a folded state and an unfolded state of the electronic device 1, the hinge mechanism 100 also switches synchronously between the folded state and the unfolded state. In other words, when the electronic device 1 is in the folded state, the hinge mechanism 100 is also in the folded state. When the electronic device 1 is in the unfolded state, the hinge mechanism 100 is also in the unfolded state.

[0047] Furthermore, when the electronic device 1 is in the unfolded state, the display surfaces of the first display portion 410 and the second display portion 430 of the flexible display screen 400 of the electronic device 1 are flush with each other. When the electronic device 1 is in the folded state, the display surfaces of the first display portion 410 and the second display portion 430 of the flexible display screen 400 of the electronic device 1 are opposite to each other.

[0048] refer to Figure 1 In some embodiments, when the electronic device 1 is in the unfolded state, the first bracket 200, the support member 520, and the second bracket 300 are flush with each other on the sides facing the flexible display screen 400. In other words, when the electronic device 1 is in the unfolded state, the sides of the first bracket 200, the support member 520, and the second bracket 300 facing the flexible display screen 400 are flush with each other. This improves the flatness of the flexible display screen 400 when the electronic device 1 is in the unfolded state.

[0049] It should be noted that the description of "the sides of the first bracket 200 facing the flexible display screen 400, the sides of the support member 520 facing the flexible display screen 400, and the sides of the second bracket 300 facing the flexible display screen 400 being flush with each other" does not imply that the sides of the first bracket 200, the support member 520, and the second bracket 300 facing the flexible display screen 400 are coplanar. The sides of the first bracket 200, the support member 520, and the second bracket 300 can be flush with each other while meeting certain dimensional tolerances.

[0050] In some embodiments, the ultrasonic motor 510 drives the support member 520 to switch between a first extended position and a first retracted position. Specifically, when the electronic device 1 is in the extended state, the support member 520 is in the first extended position, so that the support member 520 abuts against the flexible display portion 420. When the electronic device 1 is in the folded state, the support member 520 is in the first retracted position.

[0051] For example, refer to Figures 1 to 3 When the electronic device 1 is in the unfolded state, the side of the support member 520 facing the flexible display portion 420 is spaced apart from the base 110 by a first distance. When the electronic device 1 is in the folded state, the side of the support member 520 facing the flexible display portion 420 is spaced apart from the base 110 by a second distance, which is smaller than the first distance.

[0052] In other words, when the electronic device 1 switches from an unfolded state to a folded state, the ultrasonic motor 510 drives the support member 520 to move closer to the base 110, causing the support member 520 to retract a certain distance. Exemplarily, the first rotating member 120, the support member 520, and the second rotating member 130 form an accommodating space. When the electronic device 1 is in the folded state, the flexible display portion 420 is accommodated in the accommodating space. In this way, by retracting the support member 520 a certain distance, the accommodating space is increased, thus preventing the flexible display portion 420 from being compressed.

[0053] It should be noted that since foldable electronic devices in related technologies are generally equipped with hinge mechanisms, the specific structure of the hinge mechanism 100 in this embodiment can be referenced from related technologies. Of course, those skilled in the art can also develop new hinge mechanisms by referring to the hinge mechanisms in related technologies. Therefore, the structure and working principle of the hinge mechanism 100 will not be described in detail here.

[0054] It should also be noted that the Ultrasonic Motor (USM) 510 is a motor that utilizes ultrasonic vibration energy, converting it into rotational energy or linear extensional energy. The Ultrasonic Motor 510 uses the vibrational characteristics of piezoelectric materials to drive the motion of a mover. The Ultrasonic Motor 510 can be a rotary ultrasonic motor or a linear ultrasonic motor. Since linear ultrasonic motors do not require a transmission mechanism to convert rotational motion into linear motion, it is recommended to directly select a linear ultrasonic motor. Because the structure of the Ultrasonic Motor 510 can be found in related technologies, its structure and working principle will not be described in detail here.

[0055] In some embodiments, the ultrasonic motor 510 is used to drive the support member 520 to switch multiple times between a second extended position and a second retracted position when the electronic device 1 is in the extended state. Specifically, when the support member 520 is in the second extended position, it abuts against the flexible display portion 420, causing the flexible display portion 420 to protrude beyond the first display portion 410 and the second display portion 430. When the support member 520 is in the second retracted position, the support member 520 and the flexible display portion 420 are spaced apart.

[0056] In other words, when the electronic device 1 is in the unfolded state, the ultrasonic motor 510 drives the support member 520 to extend and retract repeatedly, so that the flexible display portion 420 protrudes from the first display portion 410 and the second display portion 430, or the support member 520 and the flexible display portion 420 are spaced apart. In this way, the flexible display portion 420 can be driven to "vibrate" back and forth by the extension and retraction of the support member 520, thereby improving the concavity problem of the flexible display portion 420 and improving the flatness of the flexible display screen 400. It should be noted that the "vibration" of the support member 520 described here refers to using the ultrasonic motor 510 to drive the support member 520 to move back and forth within a certain stroke range, thereby causing the flexible display portion 420 to protrude from the first display portion 410 and the second display portion 430, or return to its natural state.

[0057] It should be noted that when it is necessary to "flatten" the flexible display portion 420 that is in a concave state, the electronic device 1 can first be in an unfolded state. Then, power can be supplied to the ultrasonic motor 510 so that the ultrasonic motor 510 drives the support member 520 to first push the flexible display portion 420 to a convex state, thereby eliminating the internal stress of the concave flexible display portion 420. Further, the ultrasonic motor 510 drives the support member 520 to retract, releasing the flexible display portion 420, so that the flexible display portion 420 returns to its natural state. By repeatedly driving the flexible display portion 420 to "vibrate," the flexible display portion 420 can be restored to a flat state.

[0058] It should also be noted that when the flexible display section 420 is restored to a flat state, it does not specifically mean that the display side of the flexible display section 420 is completely flush with the display side of the first display section 410 and the display side of the second display section 430, respectively. It is only necessary to make the display side of the flexible display section 420 roughly flush with the display side of the first display section 410 and the display side of the second display section 430, respectively, visually.

[0059] It should be noted that, since supplying power to the ultrasonic motor 510 to enable it to extend or retract quantitatively is similar to the method of controlling the quantitative movement of a conventional motor in related technologies, the quantitative extension or retraction of the ultrasonic motor 510 can be achieved with reference to related technologies. Therefore, the specific methods of using the ultrasonic motor 510 to drive the support member 520 to switch between the first extended position and the first retracted position, and using the ultrasonic motor 510 to drive the support member 520 to switch between the second extended position and the second retracted position will not be described in detail here.

[0060] In some embodiments, the number of ultrasonic motors 510 is at least two. At least two ultrasonic motors 510 are spaced apart along the extending direction of the support member 520. Each ultrasonic motor 510 is driven and connected to the support member 520, thus preventing the support member 520 from wobbling by increasing the number of support points. Of course, in some embodiments, if the precision of the ultrasonic motor 510 is high and the support member 520 does not wobble or the wobbling amplitude is manageable, then only one ultrasonic motor 510 may be provided; this will not be elaborated further here.

[0061] In some embodiments, the hinge mechanism 100 further includes a Hall sensor 610. The Hall sensor 610 is used to detect the opening and closing state of the hinge mechanism 100. In this way, the opening and closing state detection of the hinge mechanism 100 can be achieved using the Hall sensor 610.

[0062] Thus, for example, when the Hall sensor 610 detects that the hinge mechanism 100 has switched from a folded state to an unfolded state, power can be supplied to the ultrasonic motor 510 so that the ultrasonic motor 510 drives the support member 520 to extend relative to the base 110. When the Hall sensor 610 detects that the hinge mechanism 100 has switched from an unfolded state to a folded state, power can be supplied to the ultrasonic motor 510 so that the ultrasonic motor 510 drives the support member 520 to retract relative to the base 110.

[0063] In some embodiments, the hinge mechanism 100 further includes a magnetic element 620. One of the Hall sensor 610 and the magnetic element 620 is connected to the first rotating member 120, and the other is connected to the second rotating member 130 or the base 110. The magnetic element 620 is located within the measurement range of the Hall sensor 610.

[0064] For example, a Hall sensor 610 is disposed on a first rotating member 120, and a magnetic element 620 is disposed on a second rotating member 130, with the magnetic element 620 located within the measurement range of the Hall sensor 610. Alternatively, a Hall sensor 610 may be disposed on a substrate 110, and a magnetic element 620 may be disposed on a first rotating member 120, with the magnetic element 620 located within the measurement range of the Hall sensor 610. These are not all examples listed here.

[0065] It should be noted that the Hall sensor 610 is also called a Hall effect sensor. The Hall sensor 610 is a transducer that can convert a changing magnetic field into a changing voltage signal. Thus, during the opening and closing movement of the hinge mechanism 100, the magnetic component 620 moves closer to or further away from the Hall sensor 610, causing a change in the voltage signal output by the Hall sensor 610. Therefore, the opening and closing state of the hinge mechanism 100 can be determined based on the voltage signal output by the Hall sensor 610.

[0066] Of course, the placement of the Hall sensor 610 and the magnetic element 620 is not limited to the positions provided in the examples above. For example, the Hall sensor 610 can be placed on the first support 200 of the electronic device 1, and the magnetic element 620 can be placed on the second support 300 of the electronic device 1. When the electronic device 1 switches between an unfolded state and a folded state, the first support 200 and the second support 300 move away from or closer to each other. The Hall sensor 610 can also determine the folding state of the electronic device 1 by detecting changes in the magnetic field of the magnetic element 620, thereby determining the folding state of the hinge mechanism 100.

[0067] In some embodiments, the electronic device 1 includes a current detection unit that is electrically connected to the power supply circuit of the ultrasonic motor 510.

[0068] For example, when the electronic device 1 is in the unfolded state, and the flexible display unit 420 is touched by the user, the pressure applied to the flexible display unit 420 by the user is transmitted to the ultrasonic motor 510. Therefore, compared to the state where the flexible display unit 420 is not touched, the ultrasonic motor 510 needs to output a higher current to keep the support member 520 in place. Therefore, it can be determined whether the flexible display unit 420 is touched by the user by detecting the current in the power supply circuit of the ultrasonic motor 510. Furthermore, for example, when the flexible display unit 420 is touched by the user, the ultrasonic motor 510 can be used to drive the support member 520 to retract a preset distance to avoid the power output by the ultrasonic motor 510 "resisting" the user's finger, thereby improving the touch feel of the flexible display unit 420.

[0069] refer to Figure 7 and Figure 8 In some embodiments, the ultrasonic motor 510 includes a stator 511 and a mover 512. The stator 511 drives the mover 512 to extend and slide. The mover 512 is connected to the support member 520 so that the mover 512 can drive the support member 520 to extend and slide. In this way, the stator 511 of the ultrasonic motor 510 can directly drive the mover 512 to extend and slide, thereby avoiding the problem of needing to configure a screw and nut transmission mechanism to convert rotary motion into linear motion for the rotary actuator. As a result, the structure of the support mechanism 500 is more compact.

[0070] It should be noted that the stator 511 includes a piezoelectric element. The piezoelectric element is made of lead zirconate titanate. Alternatively, the piezoelectric element is made of lead zirconate titanate. The materials of the piezoelectric elements will not be listed here. The piezoelectric element has the characteristic of extending in a direction perpendicular to the applied voltage. The piezoelectric element alternately expands and contracts, causing the elastic body to bend. The mover 512 contacts the elastic body at the wavefront of the traveling wave and rubs along the trajectory on the surface of the mover in the opposite direction to the traveling wave. This characteristic is used to convert displacement into linear motion. The ultrasonic motor 510 can output rotational speeds at the micrometer level. The ultrasonic motor 510 has the advantages of small axial deviation and high precision.

[0071] In some embodiments, the stator 511 is provided with a first through hole 5111, and the ultrasonic motor 510 further includes a first mating member 513 and a second mating member 514. The first mating member 513 and the second mating member 514 are respectively provided on both sides of the stator 511 along the extension direction of the first through hole 5111. The first mating member 513 is provided with a second through hole 5131 opposite to the first through hole 5111, and the second mating member 514 is provided with a third through hole 5141 opposite to the first through hole 5111. The mover 512 is sequentially passed through the third through hole 5141, the first through hole 5111 and the second through hole 5131. The mover 512 is slidably connected to the hole wall of the third through hole 5141 and the hole wall of the second through hole 5131.

[0072] In this way, the sliding stability of the mover 512 can be improved by the sliding engagement of the first mating part 513 and the second mating part 514 with the mover 512, so as to prevent the mover 512 from wobbling relative to the stator 511.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0074] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the embodiments of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electronic device, characterized in that, include: Hinging mechanism (100), first bracket (200), second bracket (300), flexible display screen (400) and support mechanism (500); The hinge mechanism (100) includes a base (110), a first rotating member (120) and a second rotating member (130). The first rotating member (120) and the second rotating member (130) are movably connected to the two sides opposite to the base (110), respectively. The first bracket (200) is connected to the first rotating member (120), and the second rotating member (130) is connected to the second bracket (300). The flexible display screen (400) includes a first display part (410), a flexible display part (420), and a second display part (430) connected in sequence. The first display part (410) is disposed on the first bracket (200), the flexible display part (420) is opposite to the hinge mechanism (100), and the second display part (430) is disposed on the second bracket (300). The support mechanism (500) includes an ultrasonic motor (510) and a support member (520) connected to the drive. The support member (520) is located between the base (110) and the flexible display part (420). The ultrasonic motor (510) is used to drive the support member (520) to move toward or away from the base (110). When the electronic device is in the unfolded state, the support member (520) abuts against the flexible display part (420).

2. The electronic device according to claim 1, characterized in that, When the electronic device is in the unfolded state, the first bracket (200), the support member (520), and the second bracket (300) are aligned with each other on the side facing the flexible display screen (400).

3. The electronic device according to claim 1, characterized in that, The ultrasonic motor (510) is used to drive the support member (520) to switch between a first extended position and a first retracted position; wherein, when the electronic device is in the unfolded state, the support member (520) is located in the first extended position so that the support member (520) abuts against the flexible display part (420); when the electronic device is in the folded state, the support member (520) is located in the first retracted position.

4. The electronic device according to claim 1, characterized in that, The ultrasonic motor (510) is used to drive the support member (520) to switch between a second extended position and a second retracted position multiple times when the electronic device is in the extended state; wherein, when the support member (520) is in the second extended position, the support member (520) abuts against the flexible display part (420) so that the flexible display part (420) protrudes from the first display part (410) and the second display part (430); when the support member (520) is in the second retracted position, the support member (520) and the flexible display part (420) are spaced apart.

5. The electronic device according to claim 1, characterized in that, The number of ultrasonic motors (510) is at least two, and the at least two ultrasonic motors (510) are spaced apart along the extension direction of the support (520).

6. The electronic device according to claim 1, characterized in that, The hinge mechanism (100) further includes a Hall sensor (610); the Hall sensor (610) is used to detect the opening and closing state of the hinge mechanism (100).

7. The electronic device according to claim 6, characterized in that, The hinge mechanism (100) further includes a magnetic element (620), one of the Hall sensor (610) and the magnetic element (620) is connected to the first rotating element (120), and the other is connected to the second rotating element (130) or the base (110), and the magnetic element (620) is located within the measurement range of the Hall sensor (610).

8. The electronic device according to claim 1, characterized in that, The electronic device includes a current detection unit, which is electrically connected to the power supply circuit of the ultrasonic motor (510).

9. The electronic device according to any one of claims 1 to 8, characterized in that, The ultrasonic motor (510) includes a stator (511) and a mover (512). The stator (511) is used to drive the mover (512) to extend and slide. The mover (512) is connected to the support member (520).

10. The electronic device according to claim 9, characterized in that, The stator (511) is provided with a first through hole (5111). The ultrasonic motor (510) further includes a first mating part (513) and a second mating part (514). The first mating part (513) and the second mating part (514) are respectively provided on both sides of the stator (511) along the extension direction of the first through hole (5111). The first mating part (513) is provided with a second through hole (5131) opposite to the first through hole (5111). The second mating part (514) is provided with a third through hole (5141) opposite to the first through hole (5111). The mover (512) is sequentially inserted through the third through hole (5141), the first through hole (5111), and the second through hole (5131). The mover (512) is slidably connected to the hole wall of the third through hole (5141) and the hole wall of the second through hole (5131).

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