Rotating shaft mechanism and terminal device

Abstract

The embodiment of the application relates to the technical field of terminal equipment, and provides a rotating shaft mechanism and terminal equipment, which can solve the problem of poor opening angle stability of a rotating shaft mechanism in related technologies after a locking structure of the terminal equipment is unlocked. The rotating shaft mechanism comprises a base, an arm swing assembly, an elastic piece and a first cam structure; the arm swing assembly comprises a bearing piece, a pair of swing arms rotatably connected to opposite edges of the base and an even number of gears, the even number of gears are transmissionally connected between the pair of swing arms, the bearing piece is fixed opposite to the base along the circumference of the gears; the elastic piece is used for applying an elastic force to at least one of the bearing piece and the gears; the first cam structure is arranged between a first end surface of the gears and the bearing piece, and comprises a first protruding part arranged on one of the bearing piece and the first end surface, and a second protruding part arranged on the other one of the bearing piece and the first end surface. The application can be used on terminal equipment such as mobile phones.

Description

[0001] This application is a divisional application. The original application has the application number 202310185102.4 and the original application date is February 16, 2023. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of terminal equipment technology, and in particular to a rotating shaft mechanism and a terminal device. Background Technology

[0003] With the development of technology, the form of terminal devices has undergone tremendous changes. Foldable mobile phones, foldable tablets, and foldable wearable devices are gradually becoming an important development direction for future smart terminal devices.

[0004] To keep terminal devices folded and prevent them from opening during handling or carrying, designers typically incorporate a locking mechanism to keep them folded. When the terminal device needs to be used, the locking mechanism must be unlocked before it can be opened.

[0005] To facilitate opening the terminal device after the locking structure is unlocked, one type of terminal device incorporates a torsion spring in its hinge mechanism. As the hinge mechanism moves towards the folded position, the torsion spring deforms to store elastic potential energy. When the locking structure is unlocked, the terminal device springs open to a certain angle under the action of the torsion spring. However, the torsion spring deforms significantly during the hinge mechanism's movement towards the folded position, resulting in a large variation in the reaction force acting on it. This affects the torsion spring's lifespan. Furthermore, with the increasing number of folding and opening cycles of the terminal device, the torsion spring's elasticity weakens, thus impacting the stability of the terminal device's shell's spring-opening angle. Summary of the Invention

[0006] The embodiments of this application provide a rotating shaft mechanism and a terminal device to solve the problem of poor stability of the spring-opening angle of the rotating shaft mechanism after the locking structure of the terminal device is unlocked in the related art.

[0007] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0008] In a first aspect, embodiments of this application provide a rotating shaft mechanism, including a base, a rocker arm assembly, an elastic element, and a first cam structure; the rocker arm assembly includes a carrier, a pair of rocker arms rotatably connected to opposite sides of the base, and an even number of gears, the even number of gears being driven between the pair of rocker arms so that each rocker arm can rotate synchronously relative to the base between a folded position and an unfolded position; the carrier and the gears are arranged along the axial direction of the gears, and the carrier is fixed relative to the base along the circumferential direction of the gears; the elastic element is used to apply an elastic force to at least one of the carrier and the gears, so that the carrier... The first cam structure is disposed between the first end face of the gear and the carrier member, and includes a first protrusion disposed on one of the carrier member and the first end face, and a second protrusion disposed on the other of the carrier member and the first end face. The first protrusion includes a first side surface. When the swing arm is in the folded position, the second protrusion abuts against the first side surface, and under the action of the elastic force, the second protrusion and the first side surface move relative to each other or have a tendency to move relative to each other, so as to apply a force to the gear that can drive the swing arm to rotate in the unfolded position.

[0009] In the rotating shaft mechanism of this application embodiment, the elastic element applies an elastic force to at least one of the bearing member and the gear, bringing the bearing member and the gear closer together. This ensures that the second protrusion can abut against the first side. Thus, during the rotation of the swing arm from the folded position to the unfolded position, the deformation range of the elastic element is determined by the relative displacement of the first and second protrusions along the gear axis, i.e., by the height of the first protrusion. Since the height of the first protrusion is smaller than the displacement of the swing arm relative to the base, the problem of a large deformation range of the elastic element can be avoided. The reaction force on the elastic element can be reduced, thereby improving the lifespan of the elastic element and ensuring the stability of the shell opening angle of the terminal device. Furthermore, in the rotating shaft mechanism of this application embodiment, the force generated by the first cam structure when the swing arm is in the folded position can be synchronously transmitted to a pair of swing arms in the swing arm assembly through an even number of gears. This ensures that the pair of swing arms experience the same opening force, which not only improves the stability of the pair of swing arms during the opening process but also ensures that the pair of swing arms open at the same angle.

[0010] In some embodiments, there are multiple first protrusions arranged circumferentially along the gear, with a first notch formed between adjacent first protrusions. When the swing arm is in the folded position and the unfolded position, the second protrusion extends into the same first notch. This arrangement can reduce the deformation range of the elastic element, thereby further improving its lifespan.

[0011] In some embodiments, the first notch has a first bottom surface perpendicular to the axial direction of the gear. When the swing arm is in the unfolded position, the second protrusion abuts against the first bottom surface. This arrangement ensures the stability of the relative position between the second protrusion and the first protrusion, thereby ensuring the stability of the terminal device in the unfolded state.

[0012] In some embodiments, the first protrusion includes a second side surface along the circumference of the gear. The second side surface is disposed opposite to the first side surface, and the inclination angle of the second side surface relative to the axial direction of the gear is smaller than the inclination angle of the first side surface relative to the axial direction of the gear. The second side surface is connected to the first side surface of the adjacent first protrusion through the first bottom surface. This configuration can reduce the wear of the first protrusion during operation, which helps to extend the product's service life.

[0013] In some embodiments, when the swing arm is in the folded position, the second protrusion makes surface contact with the first side surface. This arrangement reduces the probability of damage occurring between the first and second protrusions.

[0014] In some embodiments, when the swing arm is in the extended position, the second protrusion is in surface contact with the first bottom surface. This configuration can reduce the swaying of the swing arm in the extended position.

[0015] In some embodiments, there are multiple first protrusions, which are arranged circumferentially along the gear. When the swing arm is in the folded position, the second protrusion abuts against the first side of one of the first protrusions. When the swing arm is in the unfolded position, the second protrusion abuts against the first side of another first protrusion. This configuration allows the terminal device to have the dual function of automatically opening in the folded state and maintaining a stable unfolded state through the first cam structure, making the cam structure layout more compact.

[0016] In some embodiments, the first protrusion includes a second side surface along the circumference of the gear. The second side surface is disposed opposite to the first side surface, and the tilt angle of the second side surface relative to the axial direction of the gear is greater than the tilt angle of the first side surface relative to the axial direction of the gear. This configuration reduces the resistance when the second protrusion "climbs" along the second side surface, thereby enabling the swing arm to smoothly rotate from the folded position to the unfolded position.

[0017] In some embodiments, the central angle corresponding to the distance between the first sides of two adjacent first protrusions along the circumference of the gear is 90 degrees. This arrangement reduces the number of times the second protrusion crosses the first protrusion, thereby reducing the rotational resistance of the swing arm.

[0018] In some embodiments, in the swing arm assembly, each of the gears is provided with the first cam structure between itself and the carrier. This arrangement allows for the generation of a larger torque to drive the swing arm to rotate towards the extended position.

[0019] In some embodiments, the two outermost gears are fixedly connected to their respective swing arms, and the gears other than the two outermost gears are slidably connected to the base along their axial direction, and a first cam structure is provided between them and the support member. This arrangement allows the swing arms to rotate more smoothly relative to the base.

[0020] In some embodiments, in the swing arm assembly, the support members are respectively provided on both sides of the gear, and the gear has two opposing first end faces. A first cam structure is respectively provided between each first end face and the corresponding support member. With this configuration, when the swing arm is in the folded position, the first cam structures on both sides of the gear can generate a greater spring-opening force, thereby enabling the rotating shaft mechanism to adapt to terminal devices that require a larger torque to spring open.

[0021] In some embodiments, the rotating shaft mechanism further includes a second cam structure disposed between the second end face of the gear and the carrier member; the second cam structure includes a third protrusion disposed on one of the carrier member and the second end face, and a fourth protrusion disposed on the other of the carrier member and the second end face, the third protrusion including a third side surface; when the swing arm is in the unfolded position, the fourth protrusion abuts against the third side surface, and under the action of the elastic force of the elastic member, the fourth protrusion and the third side surface tend to move relative to each other, so as to apply a force to the gear that prevents the swing arm from rotating in a direction closer to the folded position. This configuration allows the terminal device to be stably maintained in the unfolded state.

[0022] In some embodiments, the third protrusion includes a fourth side surface along the circumference of the gear. The fourth side surface is disposed opposite to the third side surface, and the tilt angle of the fourth side surface relative to the axial direction of the gear is greater than the tilt angle of the third side surface relative to the axial direction of the gear. This arrangement reduces the resistance when the fourth protrusion "climbs" along the fourth side surface, thereby enabling the swing arm to smoothly rotate from the folded position to the unfolded position.

[0023] In some embodiments, there are multiple third protrusions arranged circumferentially along the gear. A second notch is formed between two adjacent third protrusions, and a first positioning part is provided within the second notch. When the swing arm is in the folded position, the first positioning part positions the fourth protrusion. This arrangement reduces the swaying of the swing arm in the folded position, thereby ensuring the stability of the terminal device in the folded state.

[0024] In some embodiments, the first positioning portion includes a first positioning surface perpendicular to the axial direction of the gear, and when the rocker arm is in the folded position, the fourth protrusion makes surface contact with the first positioning surface. This configuration helps reduce processing difficulty, thereby reducing processing costs.

[0025] In some embodiments, in the swing arm assembly, the support members are respectively provided on both sides of the gear. The first end face and the second end face are two opposite end faces of the gear. A first cam structure is provided between the first end face and the support member on the corresponding side, and a second cam structure is provided between the second end face and the support member on the corresponding side. With this configuration, the same swing arm assembly can achieve the dual functions of the terminal device: automatically opening in a folded state and maintaining a stable unfolded state.

[0026] In some embodiments, there are multiple swing arm assemblies arranged along the axial direction of the gear. In a subset of the swing arm assemblies, the gear has a support member on each side, and the gear has two opposing second end faces. A second cam structure is provided between each second end face and the corresponding support member. In another subset of the swing arm assemblies, the gear has a support member on each side, and the gear has two opposing first end faces. A first cam structure is provided between each first end face and the corresponding support member. This arrangement eliminates the need to confirm the gear's orientation during assembly, thus facilitating gear assembly.

[0027] In some embodiments, in the swing arm assembly, a second cam structure is provided between each of the gears and the carrier. This arrangement can generate a greater unfolding force to prevent the swing arm from rotating to the folded position, thereby making the terminal device more stable in the unfolded state.

[0028] In some embodiments, the two outermost gears are fixedly connected to their respective swing arms, and the gears other than the two outermost gears are slidably connected to the base along their axial direction, and a second cam structure is provided between them and the support member. This arrangement allows the swing arms to rotate more smoothly relative to the base.

[0029] In some embodiments, the pivot mechanism further includes a damping mechanism, which includes a first friction element and a second friction element. The first friction element is rotatably connected to the base and connected to the swing arm via a connector, allowing the first friction element and the swing arm to rotate synchronously relative to the base. The second friction element is disposed on the base and contacts the first friction element. When the swing arm rotates between the folded position and the unfolded position, the second friction element rubs against the first friction element to apply a rotational damping force to the swing arm. This configuration allows for individual replacement of either the first or second friction element if either is damaged, without requiring the replacement of the entire damping mechanism.

[0030] In some embodiments, there are multiple first friction elements and multiple second friction elements, which are arranged along the axial direction of the gear. A first gap is formed between two adjacent second friction elements, and each first friction element is inserted into a corresponding first gap and is in contact with the adjacent second friction element. With this configuration, the magnitude of the rotational damping force can be easily adjusted by adjusting the friction between the first friction elements and the second friction elements.

[0031] In some embodiments, the first friction member includes an elastic portion with a flat hole. The wall of the flat hole has a first plane along its circumference. The second friction member is a flat shaft disposed on the base. Along the circumference of the flat shaft, the flat shaft is fixed relative to the base, and the flat shaft has a second plane and a third plane spaced apart. The flat shaft passes through the flat hole. When the swing arm is in the folded position, the first plane and the second plane are opposite to each other. When the swing arm is in the unfolded position, the first plane and the third plane are opposite to each other. This configuration allows the swing arm to be stably maintained in the folded and unfolded positions, thereby ensuring the stability of the terminal device in both folded and unfolded states.

[0032] In some embodiments, when the swing arm is in the folded position, there is a second gap between the first plane and the second plane. This configuration ensures that no friction occurs between the first and second friction elements when the swing arm rotates to near the folded position, facilitating the first cam structure to spring open the housing of the terminal device.

[0033] In some embodiments, when the swing arm is in the unfolded position, there is a third gap between the first plane and the third plane. This configuration ensures that no friction occurs between the first and second friction elements when the swing arm is rotated to near the folded position, facilitating the second cam structure to hold the terminal device in the unfolded state.

[0034] In some embodiments, the elastic portion is formed from the first friction element by a rolling process. This configuration not only improves the assembly efficiency of the damping mechanism but also enhances the reliability of the connection between the elastic portion and the main body of the first friction element.

[0035] In some embodiments, the first friction element is a sheet-like structure, and there are multiple first friction elements stacked together. Each first friction element has a notch at the flat hole that breaks the wall of the flat hole, and the notches of the multiple first friction elements form a groove extending axially along the flat axis. This configuration helps to reduce the processing difficulty and cost of the flat hole of the elastic part.

[0036] In some embodiments, the swing arm is rotatably connected to the base via a pivot, and a torsion spring is sleeved on the pivot. A first connecting arm of the torsion spring is connected to the swing arm. The base has a stop portion. When the swing arm is in the unfolded position, the second connecting arm separates from the stop portion, allowing the torsion spring to be in its natural state. When the swing arm rotates between the intermediate position and the folded position, the second connecting arm of the torsion spring abuts against the stop portion, putting the torsion spring in a stored state to apply a force to the swing arm that can drive it to rotate towards the unfolded position. The intermediate position is a position located between the folded position and the unfolded position along the rotation direction of the swing arm. This configuration reduces the magnitude of the reaction forces from the swing arm and the stop portion on the torsion spring, thus extending its service life.

[0037] In some embodiments, the base has an arc-shaped groove into which the second connecting arm extends. The arc-shaped groove extends circumferentially along the rotating shaft, and one end of the groove wall serves as the stop portion. This design simplifies the structure of the stop portion, reducing costs. Furthermore, it reduces the swaying of the second connecting arm during movement, resulting in smoother movement of the second connecting arm.

[0038] In some embodiments, the stop is a stop surface disposed on the base, and there is a movement space between the stop surface and the torsion spring for the second connecting arm to swing. This configuration simplifies the structure of the stop and helps reduce costs.

[0039] Secondly, embodiments of this application provide a terminal device, including a display screen, at least two housings, and the pivot mechanism described in the first aspect. The housings are used to support the display screen, and the pivot mechanism is located at the junction of two adjacent housings. Each arm of the pivot mechanism is connected to the corresponding housing.

[0040] The terminal device achieves the same technical effect as the rotating shaft mechanism in the first aspect, and will not be described in detail here. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the hinge mechanism of a terminal device (laptop) in the related technology;

[0042] Figure 2 This is a schematic diagram of the terminal device (mobile phone) in an unfolded state in some embodiments of this application;

[0043] Figure 3 for Figure 2 A schematic diagram of the terminal device after the display screen has been removed;

[0044] Figure 4 for Figure 2 A schematic diagram of the terminal device in a folded state;

[0045] Figure 5 for Figure 3 A magnified view of the terminal device at point A;

[0046] Figure 6 This is a schematic diagram of the rotating shaft mechanism in the first embodiment of this application;

[0047] Figure 7 for Figure 6 The rotating shaft mechanism in the middle is shown in the cross-sectional view at MM.

[0048] Figure 8 for Figure 7 A schematic diagram of the swing arm of the rotating shaft mechanism in the folded position;

[0049] Figure 9 for Figure 6 Exploded view of the rotating shaft mechanism in the image;

[0050] Figure 10 for Figure 7 A view of the rotating shaft mechanism along direction B;

[0051] Figure 11 This is a perspective view of the swing arm of the rotating shaft mechanism in the first embodiment of this application in the folded position;

[0052] Figure 12 for Figure 11 A magnified view of the rotating shaft mechanism at a certain point;

[0053] Figure 13 This is a perspective view of the swing arm of the rotating shaft mechanism in the first embodiment of this application in the extended position;

[0054] Figure 14 for Figure 13 A magnified view of the rotating shaft mechanism at point D;

[0055] Figure 15 This is a circumferential unfolded view of the first cam structure between the four gears and the carrier of the rocker arm assembly in the first embodiment of this application when the rocker arm is in different positions.

[0056] Figure 16 for Figure 15 The circumferential unfolding of the first cam structure between the rightmost gear and the carrier when the rocker arm is in different positions;

[0057] Figure 17 This is a schematic diagram of the first cam structure provided on the gear connected to the rocker arm in the rotating shaft mechanism of the first embodiment of this application;

[0058] Figure 18 This is a schematic diagram of the first cam structure provided on the carrier in the rotating shaft mechanism of the first embodiment of this application;

[0059] Figure 19 This is a circumferential unfolded view of the second cam structure between the four gears and the carrier of the rocker arm assembly in the first embodiment of this application when the rocker arm is in different positions.

[0060] Figure 20 for Figure 19 The circumferential unfolding diagram of the second cam structure between the rightmost gear and the carrier when the rocker arm is in different positions;

[0061] Figure 21 This is a schematic diagram of the second cam structure provided on the gear connected to the rocker arm in the rotating shaft mechanism of the first embodiment of this application;

[0062] Figure 22 This is a schematic diagram of the second cam structure provided on the bearing member in the rotating shaft mechanism of the first embodiment of this application;

[0063] Figure 23 This is a schematic diagram of another structure of the second cam structure in the embodiments of this application;

[0064] Figure 24 This is a schematic diagram of the swing arm of the rotating shaft mechanism in the extended position in the second embodiment of this application;

[0065] Figure 25 This is a schematic diagram of the swing arm of the rotating shaft mechanism in the extended position in the third embodiment of this application;

[0066] Figure 26 This is a perspective view of the swing arm of the rotating shaft mechanism in the third embodiment of this application in the folded position;

[0067] Figure 27 for Figure 26 A magnified view of the rotating shaft mechanism at point E;

[0068] Figure 28 This is a perspective view of the swing arm of the rotating shaft mechanism in the third embodiment of this application in the extended position;

[0069] Figure 29 for Figure 28 A magnified view of the rotating shaft mechanism at point F;

[0070] Figure 30 This is a circumferential unfolded view of the first cam structure between the four gears and the carrier of the rocker arm assembly in the third embodiment of this application when the rocker arm is in different positions.

[0071] Figure 31 for Figure 30 The circumferential unfolding of the first cam structure between the rightmost gear and the carrier when the rocker arm is in different positions;

[0072] Figure 32 This is a schematic diagram of the first cam structure provided on the bearing member in the rotating shaft mechanism of the third embodiment of this application;

[0073] Figure 33 for Figure 28 An exploded view of the damping mechanism of the rotating shaft mechanism shown in the figure;

[0074] Figure 34 for Figure 28 The cross-sectional view of the rotating shaft mechanism shown in the figure at EE after the connecting frame has been removed;

[0075] Figure 35 for Figure 26 The cross-sectional view of the rotating shaft mechanism shown in the figure at FF after the connecting frame has been removed;

[0076] Figure 36 This is a schematic diagram of another structure of the damping mechanism in the rotating shaft mechanism in the embodiments of this application;

[0077] Figure 37 for Figure 36 A schematic diagram showing the positional relationship between the first friction component and the second friction component during rotation;

[0078] Figure 38 for Figure 37 A partial enlarged view of the connection between the first and second friction components;

[0079] Figure 39 This is a schematic diagram of the third structure of the damping mechanism in the rotating shaft mechanism in the embodiments of this application;

[0080] Figure 40 This is a schematic diagram of the rotating shaft mechanism in some embodiments of this application;

[0081] Figure 41 for Figure 40 A partially enlarged view of the position of the torsion spring in the rotating shaft mechanism shown;

[0082] Figure 42 for Figure 40 A cross-sectional view of the rotating shaft mechanism at point HH;

[0083] Figure 43 This is a state diagram of the torsion spring during the rotation of the swing arm according to an embodiment of this application;

[0084] Figure 44 This is a cross-sectional view of the base of the rotating shaft mechanism near the torsion spring in some embodiments of this application;

[0085] Figure 45 This is a diagram showing the position of the second connecting arm of the torsion spring during the rotation of the swing arm, according to an embodiment of this application. Detailed Implementation

[0086] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0087] With the development of technology, the form of terminal devices has undergone tremendous changes. Foldable mobile phones, foldable tablets, and foldable wearable devices are gradually becoming an important development direction for future smart terminal devices.

[0088] When not in use, the terminal device is folded for easy carrying. To keep the terminal device folded and prevent it from opening during handling or transport, designers typically incorporate locking mechanisms (such as latches or magnetic closures) to keep it folded. When the terminal device needs to be used, the locking mechanism must be unlocked before it can be opened for use.

[0089] To facilitate opening the device after the locking mechanism is unlocked, some devices now incorporate auxiliary opening mechanisms on their casings, such as handle grooves or beveled handles. Users utilize these mechanisms to open the device. However, adding these auxiliary opening mechanisms not only affects the device's appearance but also occupies considerable space on the casing, especially for foldable phones where there is often insufficient space for such designs. This complicates the design of these auxiliary opening mechanisms.

[0090] To address the issue of the auxiliary opening structure occupying too much space on the housing, some other terminal devices now incorporate the auxiliary opening structure into the terminal device's pivot mechanism (also known as the hinge mechanism). In this way, after the terminal device's locking structure is unlocked, the auxiliary opening structure will automatically spring the terminal device open at a certain angle to facilitate subsequent opening operations for the user.

[0091] like Figure 1 As shown, Figure 1 This is a schematic diagram of the hinge mechanism of a terminal device (laptop) in the related art. The hinge mechanism includes a base 06, a main pin 030, a pair of fixing plates P1, and a torsion spring 050. The fixing plates P1 are used to fix the terminal device housing. Each fixing plate P1 is rotatably connected to the base 06 through the main pin 030. The torsion spring 050 is sleeved on the main pin 030. The fixed end of the torsion spring 050 is inserted into the opening of the base 06, and the force-applying end of the torsion spring 050 presses against the fixing plate P1.

[0092] When the fixing plate P1 rotates towards the folding position following the main pin 030, it will drive the force-applying end of the torsion spring 050 to rotate, causing the torsion spring 050 to deform. When the housing connected by the two fixing plates P1 is closed, the torsion spring 050 reaches its maximum deformation and stores elastic potential energy. Therefore, when the locking structure is unlocked, the housing connected by the two fixing plates P1 will spring open at a certain angle under the action of the torsion spring 050.

[0093] In the related technology, this type of rotating mechanism relies solely on the elastic force of the torsion spring 050 to control the opening of the terminal device's casing. However, during the rotation of the fixed plate P1 from the unfolded position to the folded position, the force-applying end of the torsion spring 050 rotates together with the fixed plate P1 until it reaches the folded position. This results in a large deformation range of the torsion spring 050 and a large variation in the reaction force it receives, which in turn affects the service life of the torsion spring 050. As the number of times the terminal device is folded and opened increases, the elasticity of the torsion spring 050 weakens, causing the elastic force applied to the fixed plate P1 to decrease, thus reducing the opening angle of the terminal device's casing and affecting the stability of the opening angle of the terminal device's casing.

[0094] To address this issue, this application provides a rotating shaft mechanism and a terminal device. By incorporating a cam structure into the rotating shaft mechanism, the cam structure can provide a spring-opening force when the terminal device is in a folded state, thereby solving the problem of poor spring-opening angle stability of the rotating shaft mechanism in related technologies after the locking structure of the terminal device is unlocked.

[0095] The terminal device in this application embodiment can be a foldable terminal device such as a mobile phone, tablet computer, laptop computer, or wearable device. The following description uses a mobile phone as an example to illustrate the specific structure of the hinge mechanism in the terminal device. Other terminal devices can be configured with reference to the hinge mechanism in the mobile phone embodiment, and will not be elaborated upon here.

[0096] like Figure 2 , Figure 3 and Figure 4 As shown, Figure 2 This is a schematic diagram of the terminal device (mobile phone) in its unfolded state in some embodiments of this application. Figure 3 for Figure 2 A structural diagram of the terminal device after the display screen 200 has been removed. Figure 4 for Figure 2 A schematic diagram of the terminal device in a folded state.

[0097] The terminal device includes a hinge mechanism 100, a display screen 200, and two housings 300. The housings 300 support the display screen 200. The hinge mechanism 100 is located at the junction of the two housings 300, allowing the two housings 300 to be in an unfolded state (e.g., Figure 2 (as shown) and folded state (as shown) Figure 4 Switch between (as shown).

[0098] Of course, the aforementioned terminal equipment is not limited to having two housings 300. It can also have more than two housings 300, such as three or four, depending on the actual situation. The rotating shaft mechanism 100 is located at the junction of two adjacent housings 300.

[0099] like Figure 2 and Figure 3 As shown, the housing 300 includes a bottom wall 310, a side wall 320 disposed at the edge of the bottom wall 310, and a rear cover 330 (also called a battery cover) fastened to the side wall 320. The bottom wall 310, the side wall 320 and the rear cover 330 together form a mounting space, which is used to mount components such as batteries and circuit boards. The side of the bottom wall 310 away from the mounting space is used to mount the display screen 200.

[0100] In some embodiments, such as Figure 2 and Figure 3 As shown, the display screen 200 can be disposed on the surface of the bottom wall 310 away from the setting space; in other embodiments, a first receiving groove is formed on the surface of the bottom wall 310 away from the setting space, and the display screen 200 is disposed in the first receiving groove formed on the bottom wall 310.

[0101] The display screen 200 itself is bendable and can be bent and deformed under external force. For example... Figure 3As shown, when the two housings 300 are in the unfolded state, the display screen 200 unfolds, exposing its display area to facilitate the display of image information to the user. The display screen 200 includes a first display area 210, a second display area 220, and a third display area 230. The first display area 210 covers the bottom wall 310 of one housing 300, the second display area 220 covers the bottom wall 310 of the other housing 300, and the third display area 230 covers the rotating shaft mechanism 100.

[0102] The aforementioned display screen 200 can be entirely a flexible screen structure, for example, the first display area 210, the second display area 220, and the third display area 230 of the display screen 200 can all be flexible screen structures; the display screen 200 can also have a flexible screen structure in the middle folded part, while the two sides are rigid screen structures, for example, the first display area 210 and the second display area 220 of the display screen 200 are rigid screen structures, and the third display area 230 is a flexible screen structure.

[0103] like Figure 4 As shown, when the two housings 300 are in a folded state, they are stacked on top of each other, and the display screen 200 is folded between the two housings 300, which facilitates the carrying of the terminal device. The first display area 210 and the second display area 220 of the display screen 200 are stacked. Here, "stacked" means that the first display area 210 and the second display area 220 are superimposed in the thickness direction, and the thickness directions of the first display area 210 and the second display area 220 are parallel or approximately parallel (for example, with a deviation within 10°). The stacked first display area 210 and the second display area 220 can be attached to each other, or there can be a gap between the first display area 210 and the second display area 220; no specific limitation is made here.

[0104] like Figures 5-8 As shown, Figure 5 for Figure 3 A magnified view of the terminal device at point A. Figure 6 This is a schematic diagram of the rotating shaft mechanism 100 in the first embodiment of this application. Figure 7 for Figure 6 The cross-sectional view of the rotating shaft mechanism 100 at MM. Figure 8 for Figure 7 A schematic diagram of the swing arm of the rotating shaft mechanism 100 in the folded position.

[0105] The rotating shaft mechanism 100 includes a base 1, a swing arm assembly 2, an elastic element 3, and a first cam structure 4.

[0106] The swing arm assembly 2 includes a pair of swing arms 21 rotatably connected to opposite sides of the base 1, and an even number of gears 22. The even number of gears 22 are driven between the pair of swing arms 21, so that each swing arm 21 can be in a folded position (e.g., Figure 8 (as shown) and unfolded position (as shown) Figure 7 The two (as shown) rotate synchronously relative to the base 1.

[0107] When both housings 300 are in the unfolded state, both swing arms 21 in the swing arm assembly 2 are in the unfolded position; when both housings 300 are in the folded state, both swing arms 21 are in the folded position. When the two housings 300 switch to the folded state, the swing arms 21 rotate relative to the base 1 towards the folded position; when the two housings 300 switch to the unfolded state, the swing arms 21 rotate relative to the base 1 towards the unfolded position.

[0108] In some embodiments, such as Figure 7 and Figure 8 As shown, in the swing arm assembly 2, there are four gears 22. The four gears 22 are rotatably connected to the base 1, and the two adjacent gears 22 mesh with each other. The two outermost gears 22 are fixedly connected to the corresponding swing arms 21, so that the swing arms 21 can rotate relative to the base 1 in the folded position and the unfolded position.

[0109] By connecting four gears 22 between a pair of swing arms 21, when one swing arm 21 rotates at a certain angle relative to the base 1, the swing arm 21 can transmit power to the other swing arm 21 through the four gears 22, so that the other swing arm 21 also rotates at the same angle relative to the base 1, thereby realizing the synchronous rotation of a pair of swing arms 21 relative to the base 1 in the swing arm assembly 2.

[0110] The number of gears 22 in the rocker arm assembly 2 is not limited to four; it can also be two, six, eight, etc., depending on the actual situation. When there are two gears 22, each gear 22 is fixedly connected to the corresponding rocker arm 21. The gear 22 fixedly connected to the rocker arm 21 can be an integral structure with the rocker arm 21 (e.g., Figure 7 and Figure 8 (As shown), it can also be set separately from the swing arm 21, depending on the actual situation.

[0111] In the swing arm assembly 2, the even number of gears 22 can all be incomplete gears 22, all be complete gears 22, or be a combination of incomplete and complete gears 22; no specific limitation is made here. For example, ... Figure 8 As shown, among the four gears 22, the two outermost gears 22 are incomplete gears 22, and the two gears 22 in the middle are complete gears 22.

[0112] Among them, an incomplete gear 22 refers to a gear 22 in which teeth and tooth grooves are distributed on a part of the circumferential surface in the circumferential direction; a complete gear 22 refers to a gear 22 in which teeth and tooth grooves are distributed on all the circumferential surfaces in the circumferential direction.

[0113] In some embodiments, such as Figure 5 and Figure 6 As shown, the swing arm 21 is connected to the corresponding housing 300 via a connecting frame 400. The connecting frame 400 is fixed to the housing 300, and the swing arm 21 is slidably connected to the connecting frame 400. The slidable connection between the swing arm 21 and the connecting frame 400 is to ensure that the mechanism formed by the housing 300, the base 1, and the swing arm 21 has one degree of freedom, so as to ensure that the two housings 300 can be smoothly unfolded and folded.

[0114] The swing arm 21 and the connecting frame 400 can be slidably connected through the following structure: In some embodiments, such as Figure 6 and Figure 9 As shown, the connecting frame 400 has a sliding groove 410. One end of the sliding groove 410 is located near the base 1, and the other end of the sliding groove 410 is located away from the base 1. The swing arm 21 is slidably engaged with the sliding groove 410. In some other embodiments, the swing arm 21 may also be provided with a sliding shaft, and the connecting frame 400 has a sliding hole. One end of the sliding hole is located near the base 1, and the other end of the sliding hole is located away from the base 1. The sliding shaft is slidably engaged with the sliding hole.

[0115] Of course, in addition to being connected to the housing 300 via the connecting bracket 400, the swing arm 21 can also be directly slidably connected to the housing 300, depending on the actual situation.

[0116] In some embodiments, such as Figure 5 , Figure 6 and Figure 9 As shown, Figure 9 for Figure 6 An exploded view of the rotating shaft mechanism 100 is shown. The base 1 includes a shaft cover 11 and a base body 12 disposed on the shaft cover 11. The base body 12 includes a first sub-base 13 and a second sub-base 14 spaced apart, and a plurality of mounting shafts 15 disposed between the first sub-base 13 and the second sub-base 14. The plurality of mounting shafts 15 are arranged along the width direction Y of the base 1, and each mounting shaft 15 extends along the length direction X of the base 1. One end of each mounting shaft 15 is connected to the first sub-base 13, and the other end is connected to the second sub-base 14. A swing arm assembly 2 is disposed between the first sub-base 13 and the second sub-base 14, and the gears 22 in the swing arm assembly 2 are rotatably sleeved on the corresponding mounting shafts 15 to achieve a rotatable connection between the gears 22 and the base 1.

[0117] In this configuration, the length direction X of the base 1 is perpendicular to the width direction Y of the base 1, and the thickness direction Z of the terminal device in its unfolded state. The axial direction X of the gear 22 in the swing arm assembly 2 is parallel to the length direction X of the base 1.

[0118] The base body 12 in this embodiment is not limited to the structure of the sub-base 1 + mounting shaft 15. The base body 12 can also be designed as a long strip structure, and the swing arm 21 and gear 22 are rotatably connected to the base body 12 which is a long strip structure.

[0119] In some embodiments, such as Figure 3 and Figure 5 As shown, two pairs of first sub-bases 13 and second sub-bases 14 are provided, symmetrically distributed on both sides of the mid-plane along the length direction X of the base 1. A swing arm assembly 2 is provided between each pair of first sub-bases 13 and second sub-bases 14. This design allows the swing arm assemblies 2 between the two pairs of first sub-bases 13 and second sub-bases 14 to be located on both sides of the aforementioned mid-plane, thereby maintaining the force balance of the terminal device housing 300 along the length direction X of the base 1, and thus making the terminal device housing 300 more stable during the switching between folded and unfolded states.

[0120] In some embodiments, such as Figure 3 and Figure 5 As shown, the shaft cover 11 has a receiving space 110, the base body 12 is disposed in the receiving space 110, and the base body 12 is fixedly connected to the shaft cover 11. For example, the base body 12 can be fixedly connected to the shaft cover 11 by fasteners such as screws.

[0121] The shaft cover 11 serves as the exterior part (i.e. the externally visible part) of the rotating shaft mechanism 100, and is used to cover the moving parts such as the swing arm 21 and gear 22 in the rotating shaft mechanism 100, so as to prevent the movement of the moving parts inside the rotating shaft mechanism 100 from being disturbed by the outside.

[0122] like Figure 3 and Figure 5 As shown, both housings 300 have a shielding portion 340 at the junction, and the shielding portion 340 is stepped, as shown. Figure 3 and Figure 5 As shown, when the two housings 300 are in the unfolded state, the shaft cover 11 is located in the second receiving groove 350 formed by the two blocking parts 340. The shaft cover 11 is blocked by the blocking parts 340 at this time, and the shaft cover 11 cannot be seen from the outside, thereby ensuring the appearance of the junction of the two housings 300 when the terminal device is in the unfolded state.

[0123] As the two housings 300 move from the unfolded state to the folded state, the two shielding parts 340 gradually open, and the shaft cover 11 gradually emerges from between the two shielding parts 340; Figure 4 As shown, when the two housings 300 are in the folded state, the shaft cover 11 is located in the gap formed by the two shielding parts 340 and covers the gap to prevent the moving parts of the rotating shaft mechanism 100 inside the gap from being seen from the outside, thereby ensuring the appearance of the junction of the two housings 300 when the terminal device is in the folded state.

[0124] The specific structure of the shaft cover 11 is not unique; in some embodiments, such as... Figure 5 As shown, the shaft cover 11 includes a shaft cover wall 111, which encloses a receiving space 110, for example, such as Figure 5 As shown, the shaft cover wall 111 includes a shaft cover bottom wall 112 and a shaft cover side wall 113 disposed at the periphery of the shaft cover bottom wall 112. The shaft cover bottom wall 112 and the shaft cover side wall 113 form a receiving space 110. The receiving space 110 can be a U-shaped groove, but it is not limited to this. The receiving space 110 can also be a trapezoidal groove, a semi-circular groove, an arc groove, etc.

[0125] In addition to the structure described above, in some other embodiments, the shaft cover wall 111 may also be designed as a flat plate structure.

[0126] In some embodiments, such as Figure 5 As shown, the shaft cover 11 has a clearance notch 1131 at the position corresponding to the rocker arm 21. For example, the shaft cover sidewall 113 has a clearance notch 1131 at the position corresponding to the rocker arm 21. The clearance notch 1131 is used to avoid the rocker arm 21, so as to avoid structural interference between the shaft cover 11 and the rocker arm 21 when the shaft cover 11 is in the unfolded position.

[0127] In some embodiments, such as Figure 6 and Figure 9 As shown, the swing arm assembly 2 also includes a support member 23. The support member 23 and the gear 22 are arranged along the axial direction X of the gear 22, and the support member 23 is fixed relative to the base 1 along the circumferential direction of the gear 22. The elastic member 3 is used to apply an elastic force F to at least one of the support member 23 and the gear 22 to bring the support member 23 closer to the gear 22.

[0128] The structure of the elastic element 3 is not unique; in some embodiments, such as... Figure 6 and Figure 9 As shown, the elastic element 3 is a spring, which is in a compressed state and is sleeved on the mounting shaft 15. One end of the spring applies an elastic force F to the gear 22 so that the gear 22 is close to the bearing element 23.

[0129] The number of springs can be one or more, such as... Figure 6 As shown, each mounting shaft 15 is fitted with a spring.

[0130] In addition to being a spring, in some embodiments, the elastic element 3 can also be other elastic components such as a sheet.

[0131] In addition to applying elastic force F to gear 22, elastic element 3 can also apply elastic force F to bearing element 23 or apply elastic force F to both bearing element 23 and gear 22 simultaneously by changing its setting position.

[0132] like Figure 10 As shown, Figure 10 for Figure 7 The rotating shaft mechanism 100 is shown in the B-direction view. The first cam structure 4 is disposed between the first end face 221 of the gear 22 and the carrier 23.

[0133] like Figures 11-16 As shown, Figure 11 This is a perspective view of the swing arm 21 of the rotating shaft mechanism 100 in the first embodiment of this application in the folded position. Figure 12 for Figure 11 A magnified view of the rotating shaft mechanism 100 at point C. Figure 13 This is a perspective view of the swing arm 21 of the rotating shaft mechanism 100 in the first embodiment of this application in the extended position. Figure 14 for Figure 13 A magnified view of the rotating shaft mechanism 100 at point D. Figure 15 This is a circumferential unfolded view of the first cam structure 4 between the four gears 22 and the support member 23 of the rocker arm assembly 2 in the first embodiment of this application when the rocker arm 21 is in different positions. Figure 16 for Figure 15 The circumferential unfolding of the first cam structure 4 between the rightmost gear 22 and the carrier 23 when the rocker arm 21 is in different positions.

[0134] The first cam structure 4 includes a first protrusion 41 disposed on a first end face 221 and a second protrusion 42 disposed on a support member 23. The first protrusion 41 includes a first side face 411. In some embodiments, such as Figure 15 and Figure 16 As shown, the first side surface 411 can be an inclined surface, which is inclined relative to the axial direction X of the gear 22. In other embodiments, the first side surface 411 can also be a curved surface, such as an arc surface or a parabola.

[0135] like Figure 12 , Figure 15 and Figure 16 As shown, when the swing arm 21 is in the folded position, the second protrusion 42 abuts against the first side surface 411. Under the action of the elastic force of the elastic member 3, the component force f1 generated by the squeezing force between the second protrusion 42 and the first side surface 411 causes the second protrusion 42 and the first side surface 411 to move relative to each other or have a tendency to move relative to each other, so as to apply a force to the gear 22 that can drive the swing arm 21 to rotate in the unfolded position.

[0136] Specifically, the first aspect of the embodiments of this application, namely, the contact between two components, refers to at least one of point contact, line contact, and surface contact between the two components.

[0137] Secondly, in this embodiment, the terminal device housing 300 is provided with a locking structure. The locking structure has a locked state and an unlocked state. When the locking structure is in the locked state, it locks the positions of the two housings 300, causing the two housings 300 to be in a folded state. At this time, the second protrusion 42 and the first side surface 411 are in a relatively stationary state. However, under the action of the component force f1 generated by the compressive force between the second protrusion 42 and the first side surface 411, there is a tendency for relative movement between the second protrusion 42 and the first side surface 411. For example... Figure 16 As shown in (a), gear 22 has a tendency to move to the left relative to the carrier 23; when the locking structure is in the unlocked state, as ... gear 22 has a tendency to move to the left relative to the carrier 23. Figure 16 As shown in (a), the second protrusion 42 and the first side surface 411 move relative to each other under the action of the component force f1, causing the gear 22 to rotate to the left relative to the bearing member 23. Figure 16 The gear 22 rotates to the left, causing the swing arm 21 to move in the unfolding direction; the gear 22 rotates to the right, causing the swing arm 21 to move in the folding direction. This causes the gear 22 to drive the swing arm 21 to rotate in the unfolding position, thereby causing the two housings 300 of the terminal device to spring open at a certain angle.

[0138] The locking structure can be either a snap-fit ​​structure or a magnetic adsorption mechanism. The snap-fit ​​structure includes an elastic snap provided on one housing 300 and a locking hole provided on another housing 300. When the snap-fit ​​structure is in the locked state, the elastic snap and the locking hole can be separably engaged; the elastic snap can be separated from the locking hole under the action of external force, so that the snap-fit ​​structure is in the unlocked state.

[0139] The magnetic adsorption mechanism includes an electromagnet mounted on one housing 300 and a magnetic adsorption component mounted on another housing 300. When the magnetic adsorption mechanism is in the locked state, the electromagnet is energized to attract the magnetic adsorption component; when the magnetic adsorption mechanism is in the unlocked state, the electromagnet is de-energized, and the electromagnet separates from the magnetic adsorption component. The magnetic adsorption component can be made of at least one of magnetic materials such as iron, cobalt, and nickel.

[0140] The rotating shaft mechanism 100 of this application embodiment provides a first cam structure 4 between the bearing member 23 and the gear 22. When the swing arm 21 is in the folded position, the elastic force of the elastic member 3 causes the second protrusion 42 and the first side surface 411 of the first protrusion 41 to press against each other and move relative to each other. This causes the swing arm 21 to unfold through the gear 22, so as to achieve the effect of the terminal device housing 300 automatically opening after the locking structure is switched to the unlocked state.

[0141] Compared to the pivot mechanism 100 in related technologies, the pivot mechanism 100 in this embodiment applies an elastic force F to at least one of the bearing member 23 and the gear 22 to bring the bearing member 23 and the gear 22 closer together, thereby ensuring that the second protrusion 42 can abut against the first side 411. Thus, during the rotation of the swing arm 21 from the folded position to the unfolded position, the deformation range of the elastic member 3 is determined by the relative displacement of the first protrusion 41 and the second protrusion 42 along the axial direction X of the gear 22, that is, by the height of the first protrusion 41. Since the height of the first protrusion 41 is smaller than the displacement of the swing arm 21 relative to the base 1, the problem of a large deformation range of the elastic member 3 can be avoided, and the reaction force on the elastic member 3 can be reduced, thereby improving the life of the elastic member 3. The elastic member 3 can provide a stable elastic force F to at least one of the bearing member 23 and the gear 22 to ensure the stability of the opening angle of the terminal device housing 300.

[0142] In addition, in the embodiment of this application, the spring-opening force generated by the first cam structure 4 when the swing arm 21 is in the folded position (that is, the component force f1 generated by the extrusion force between the second protrusion 42 and the first side 411) of the rotating shaft mechanism 100 can be synchronously transmitted to a pair of swing arms 21 in the swing arm assembly 2 through an even number of gears 22. This makes the spring-opening force on the pair of swing arms 21 the same, which not only improves the stability of the pair of swing arms 21 during the spring-opening process, but also makes the angle of spring-opening of the pair of swing arms 21 the same.

[0143] In some embodiments, such as Figure 15 and Figure 16 As shown, there are multiple first protrusions 41, which are arranged circumferentially along the gear 22. A first notch 43 is formed between two adjacent first protrusions 41. When the rocker arm 21 is in the folded position and the unfolded position, the second protrusion 42 extends into the same first notch 43. In this way, when the rocker arm 21 rotates between the folded position and the unfolded position, the second protrusion 42 can avoid passing over the first protrusion 41, thereby reducing the displacement of the second protrusion 42 relative to the first protrusion 41 in the axial direction X of the gear 22. This results in a smaller deformation range of the elastic element 3, thereby further improving the service life of the elastic element 3.

[0144] It is important to understand that, in order for the second protrusion 42 to extend into the same first notch 43 when the swing arm 21 is in the folded and unfolded positions, the central angle of the first notch 43 in the circumferential direction of the gear 22 must be greater than or equal to 90 degrees. This is because when the swing arm 21 moves from the folded position to the unfolded position, the swing arm 21 rotates 90 degrees, and the gear 22, which is connected to the swing arm 21, also rotates 90 degrees, that is, the gear 22 rotates a quarter turn. Therefore, the central angle of the first notch 43 in the circumferential direction of the gear 22 needs to be greater than or equal to 90 degrees in order to provide sufficient space for the second protrusion 42 within the first notch 43.

[0145] In some embodiments, such as Figure 16 and Figure 17 As shown, Figure 17 This is a schematic diagram of the first cam structure 4 provided on the gear 22 connected to the rocker arm 21 in the rotating shaft mechanism 100 of the first embodiment of this application. There are two first protrusions 41.

[0146] Of course, the number of the first protrusion 41 is not limited to two; it can also be three, one, etc., depending on the actual situation.

[0147] In some embodiments, such as Figure 16 and Figure 17 As shown, a first bottom surface 431 is provided within the first notch 43. The first bottom surface 431 is perpendicular to the axial direction X of the gear 22. When the swing arm 21 is in the unfolded position, the second protrusion 42 abuts against the first bottom surface 431. Compared to the first bottom surface 431 being inclined relative to the axial direction X of the gear 22, the first bottom surface 431 is perpendicular to the axial direction X of the gear 22. This avoids relative movement between the second protrusion 42 and the first bottom surface 431 under the elastic force of the elastic member 3, thereby ensuring the stability of the relative position of the second protrusion 42 and the first protrusion 41, so that the swing arm 21 is stably located in the unfolded position, and thus ensuring the stability of the terminal device in the unfolded state.

[0148] In some embodiments, such as Figure 16As shown, the first protrusion 41 includes a second side surface 412 along the circumference of the gear 22. The second side surface 412 is positioned opposite to the first side surface 411, and the inclination angle of the second side surface 412 relative to the axial direction X of the gear 22 is smaller than the inclination angle of the first side surface 411 relative to the axial direction X of the gear 22. In other words, the second side surface 412 is steeper than the first side surface 411. The second side surface 412 is connected to the first side surface 411 of the adjacent first protrusion 41 via a first bottom surface 431. Since the inclination angle of the second side surface 412 relative to the axial direction X of the gear 22 is smaller than the inclination angle of the first side surface 411 relative to the axial direction X of the gear 22, compared to setting the inclination angle of the second side surface 412 to be consistent with that of the first side surface 411, this increases the lateral distance between the first side surface 411 and the second side surface 412 on the same first protrusion 41, thereby reducing the wear of the first protrusion 41 by the swing arm 21 during folding and unfolding, which is beneficial to extending the product's service life.

[0149] In some embodiments, such as Figure 16 As shown, when the swing arm 21 is in the folded position, the second protrusion 42 is in surface contact with the first side surface 411. That is, the second protrusion 42 has a flat surface on its side, and when the swing arm 21 is in the folded position, the flat surface of the second protrusion 42 is in surface contact with the first side surface 411. This design reduces the pressure exerted by the interaction between the second protrusion 42 and the first side surface 411, thereby reducing the probability of damage to the first protrusion 41 and the second protrusion 42.

[0150] In some embodiments, such as Figure 16 As shown, when the swing arm 21 is in the extended position, the second protrusion 42 is in surface contact with the first bottom surface 431. That is, the top of the second protrusion 42 has a flat surface, and when the swing arm 21 is in the extended position, the flat surface of the top of the second protrusion 42 is in surface contact with the first bottom surface 431. This arrangement increases the contact area between the second protrusion 42 and the first bottom surface 431, making it less likely for the second protrusion 42 to sway along the first bottom surface 431 when the swing arm 21 is in the extended position. This reduces the swaying of the swing arm 21 in the extended position, thereby ensuring the stability of the terminal device in the extended state.

[0151] In some embodiments, such as Figure 16 and Figure 18 As shown, Figure 18This is a schematic diagram of the first cam structure 4 provided on the support member 23 in the rotating shaft mechanism 100 of the first embodiment of this application. There are multiple second protrusions 42, arranged circumferentially along the gear 22. A third notch 44 is formed between adjacent second protrusions 42 for corresponding first protrusions 41 to extend into. Each second protrusion 42 extends into its corresponding first notch 43. By setting the number of second protrusions 42 to multiple, when the rocker arm 21 is in the folded position, the multiple second protrusions 42 can respectively press against their corresponding first protrusions 41, thereby improving the contact stress of the first cam structure 4 and helping to prevent changes in the shape of the first cam structure 4 during use.

[0152] The number of second protrusions 42 is equal to the number of first protrusions 41, for example, such as Figure 16 As shown, the number of second protrusions 42 is two, just like the number of first protrusions 41.

[0153] In some embodiments, such as Figure 16 As shown, a third bottom surface 441 is provided within the third notch 44. The third bottom surface 441 is perpendicular to the axial direction X of the gear 22. When the swing arm 21 is in the extended position, the first protrusion 41 and the third bottom surface 441 are in surface contact. That is, the top of the first protrusion 41 has a flat surface, and when the swing arm 21 is in the extended position, the flat surface of the top of the first protrusion 41 is in surface contact with the third bottom surface 441. By this arrangement, the contact area between the first protrusion 41 and the third bottom surface 441 can be increased, making it less likely for the first protrusion 41 to sway along the third bottom surface 441 when the swing arm 21 is in the extended position. This reduces the swaying of the swing arm 21 in the extended position and thus ensures the stability of the terminal device in the extended state.

[0154] In this embodiment, the second protrusion 42 in the first cam structure 4 can be provided in multiple ways, or it can be provided in a single way. The positions of the first protrusion 41 and the second protrusion 42 in the first cam structure 4 can also be interchanged, that is: the first protrusion 41 is provided on the support member 23, and the second protrusion 42 is provided on the first end face 221 of the gear 22, which can also achieve the same effect.

[0155] In some embodiments, such as Figure 14 and Figure 15As shown, in the swing arm assembly 2, each gear 22 is provided with a first cam structure 4 between it and the support member 23. With this design, when the swing arm 21 is in the folded position, each gear 22 can be subjected to the force applied by the corresponding first cam structure 4, which can generate a larger torque to drive the swing arm 21 to rotate to the unfolded position. This allows the first cam structure 4 to adapt to terminal devices that require a larger torque to open.

[0156] During the rotation of the swing arm 21 from the unfolded position to the folded position, with the gear 22 as a reference, the second protrusion 42 needs to "climb" along the first side 411 of the first protrusion 41, causing the swing arm 21 to move along the axial direction X with the outermost gear 22. To ensure that the swing arm 21 can move smoothly along the axial direction X of the gear 22, the swing arm 21 is movably connected to the housing 300 along the axial direction X of the gear 22, for example... Figure 6 As shown, there is a movement gap between the swing arm 21 and the two side walls of the slide groove 410 of the connecting frame 400, so that the swing arm 21 can move along the X axis in the slide groove 410.

[0157] Of course, in the swing arm assembly 2, in addition to each gear 22 having a first cam structure 4 between it and the support member 23, a number of gears 22 may also have a first cam structure 4 between it and the support member 23. Specifically, in the swing arm assembly 2, the two outermost gears 22 are fixedly connected to the corresponding swing arms 21, and the gears 22 other than the two outermost gears 22 (e.g., Figure 14 The two gears 22 located in the middle are slidably connected to the base 1 along their axial direction X, and a first cam structure 4 is provided between them and the support member 23. With this design, when the swing arm 21 rotates from the unfolded position to the folded position, the gears 22 connected to the swing arm 21 will not move axially X due to the force of the first cam structure 4, so that the swing arm 21 can rotate more smoothly relative to the base 1.

[0158] In some embodiments, such as Figure 14 , Figure 19 and Figure 20 As shown, Figure 19 This is a circumferential unfolded view of the second cam structure between the four gears 22 and the support member 23 of the rocker arm assembly 2 in the first embodiment of this application when the rocker arm 21 is in different positions. Figure 20 for Figure 19 The circumferential unfolding of the second cam structure between the rightmost gear 22 and the carrier 23 when the rocker arm 21 is in different positions.

[0159] The rotating shaft mechanism 100 also includes a second cam structure 5 disposed between the second end face 222 of the gear 22 and the carrier member 23; the second cam structure 5 includes a third protrusion 51 disposed on the second end face 222 and a fourth protrusion 52 disposed on the carrier member 23. The third protrusion 51 includes a third side surface 511, wherein the third side surface 511 can be an inclined surface, which is inclined relative to the axial direction X of the gear 22; in addition to the inclined surface, the third side surface 511 can also be a curved surface, such as an arc surface, a parabola, etc.

[0160] When the swing arm 21 is in the unfolded position, the fourth protrusion 52 abuts against the third side surface 511. Under the elastic force of the elastic member 3, the component force f2 generated by the pressing force between the fourth protrusion 52 and the third side surface 511 causes the fourth protrusion 52 and the third side surface 511 to tend to move relative to each other, thereby applying a force to the gear 22 that prevents the swing arm 21 from rotating towards the folded position. Figure 20 As shown in (b), this force (i.e., the unfolding force) can cause gear 22 to have a tendency to rotate to the left. Figure 20 The gear 22 rotates to the left, causing the swing arm 21 to move in the unfolding direction; the gear 22 rotates to the right, causing the swing arm 21 to move in the folding direction. This prevents the swing arm 21 from wobbling in the unfolded position and keeps the swing arm 21 stably in the unfolded position. This allows the terminal device to remain stably in the unfolded state, thereby improving the user experience.

[0161] In some embodiments, such as Figure 20 As shown, the third protrusion 51 includes a fourth side surface 512 along the circumference of the gear 22. The fourth side surface 512 is disposed opposite to the third side surface 511. The inclination angle of the fourth side surface 512 relative to the axial direction X of the gear 22 is greater than the inclination angle of the third side surface 511 relative to the axial direction X of the gear 22.

[0162] During the rotation of the swing arm 21 from the folded position to the unfolded position, with the gear 22 as a reference, the fourth protrusion 52 needs to pass over the third protrusion 51 along the fourth side 512 and then abut against the third side 511 of the third protrusion 51. Since the tilt angle of the fourth side 512 relative to the axial X of the gear 22 is greater than the tilt angle of the third side 511 relative to the axial X of the gear 22, that is, the fourth side 512 is gentler than the third side 511, this reduces the difficulty for the fourth protrusion 52 to pass over the third protrusion 51 and reduces the resistance when the fourth protrusion 52 "climbs" along the fourth side 512, so that the swing arm 21 can smoothly rotate from the folded position to the unfolded position, thereby ensuring that the terminal device can smoothly switch to the unfolded state.

[0163] Of course, the positions of the third protrusion 51 and the fourth protrusion 52 can also be interchanged. That is, the third protrusion 51 is set on the support member 23, and the fourth protrusion 52 is set on the second end face 222 of the gear 22. In this way, the resistance of the fourth protrusion 52 when "climbing" along the fourth side 512 can also be reduced.

[0164] In some embodiments, such as Figure 20 and Figure 21 As shown, Figure 21 This is a schematic diagram of the second cam structure 5 provided on the gear 22 connected to the swing arm 21 in the rotating shaft mechanism 100 of the first embodiment of this application. There are multiple third protrusions 51, arranged circumferentially along the gear 22. A second notch 53 is formed between two adjacent third protrusions 51. A first positioning part 531 is provided within the second notch 53. When the swing arm 21 is in the folded position, the first positioning part 531 positions the fourth protrusion 52. By providing the first positioning part 531 to position the fourth protrusion 52, the fourth protrusion 52 is less likely to wobble when the swing arm 21 is in the folded position, thereby reducing the wobbling of the swing arm 21 in the folded position and ensuring the stability of the terminal device in the folded state.

[0165] The structure of the first positioning part 531 is not unique; in some embodiments, such as... Figure 20 As shown, the first positioning part 531 includes a first positioning surface 5311 perpendicular to the axial direction X of the gear 22. When the rocker arm 21 is in the folded position, the fourth protrusion 52 is in surface contact with the first positioning surface 5311. That is, the top of the fourth protrusion 52 has a flat surface, and when the rocker arm 21 is in the folded position, the flat surface of the top of the fourth protrusion 52 is in surface contact with the first positioning surface 5311. By setting the first positioning part 531 as the first positioning surface 5311 and having it in surface contact with the fourth protrusion 52, the positioning structure can be simplified, which helps to reduce the processing difficulty and thus reduce the processing cost.

[0166] In addition to being a first positioning surface 5311, the first positioning part 531 can also be a positioning groove, a magnetic attractor, etc. When the first positioning part 531 is a positioning groove, the top of the fourth protrusion 52 is provided with a structure that mates with the positioning groove. When the first positioning part 531 is a magnetic attractor, the top of the fourth protrusion 52 is provided with a magnetic element that can be attracted by the magnetic attractor, wherein both the magnetic attractor and the magnetic element can be magnets.

[0167] Of course, the first positioning part 531 may not be required within the second gap 53, such as... Figure 23 As shown, Figure 23 This is a schematic diagram of another structure of the second cam structure 5 in the embodiments of this application. Figure 23 Lieutenant General Figure 20The first positioning surface 5311 is removed, and when the swing arm 21 is in the extended position, the fourth protrusion 52 abuts against the fourth side surface 512.

[0168] In some embodiments, such as Figure 20 and Figure 22 As shown, Figure 22 This is a schematic diagram of the second cam structure 5 provided on the support member 23 in the rotating shaft mechanism 100 of the first embodiment of this application. There are multiple fourth protrusions 52, arranged circumferentially along the gear 22. A fourth notch 54 is formed between adjacent fourth protrusions 52, allowing a third protrusion 51 to extend into it. By setting the number of fourth protrusions 52 to multiple, when the rocker arm 21 is in the extended position, the multiple fourth protrusions 52 can respectively press against the corresponding third protrusion 51 to reduce contact stress, thereby effectively extending the service life of the second cam structure 5.

[0169] The number of fourth protrusions 52 is equal to the number of third protrusions 51, for example, as shown in the example. Figure 20 As shown, the number of fourth protrusions 52 and the number of third protrusions 51 are both three. Of course, the number of fourth protrusions 52 and the number of third protrusions 51 are not limited to three; they can also be four, six, eight, etc., depending on the actual situation.

[0170] In some embodiments, such as Figure 20 As shown, a second positioning part 541 is provided in the fourth notch 54. When the swing arm 21 is in the folded position, the second positioning part 541 positions the third protrusion 51. By providing the second positioning part 541 to position the third protrusion 51, the third protrusion 51 is less likely to wobble when the swing arm 21 is in the folded position, thereby reducing the wobbling of the swing arm 21 in the folded position and further ensuring the stability of the terminal device in the folded state.

[0171] The structure of the second positioning part 541 is not unique; in some embodiments, such as... Figure 20 As shown, the second positioning part 541 includes a second positioning surface 5411 perpendicular to the axial direction X of the gear 22. The third protrusion 51 is in surface contact with the second positioning surface 5411 when the rocker arm 21 is in the folded position. That is, the top of the third protrusion 51 has a flat surface, and when the rocker arm 21 is in the folded position, the flat surface of the top of the third protrusion 51 is in surface contact with the second positioning surface 5411. By setting the second positioning part 541 as the second positioning surface 5411 and having surface contact with the third protrusion 51, the positioning structure can be simplified, which helps to reduce the processing difficulty and thus reduce the processing cost.

[0172] In addition to being a second positioning surface 5411, the second positioning part 541 can also be a positioning groove, a magnetic attractor, etc. When the second positioning part 541 is a positioning groove, the top of the third protrusion 51 is provided with a structure that mates with the positioning groove. When the second positioning part 541 is a magnetic attractor, the top of the third protrusion 51 is provided with a magnetic element that can be attracted by the magnetic attractor, wherein both the magnetic attractor and the magnetic element can be magnets.

[0173] In this embodiment of the application, the fourth protrusion 52 in the second cam structure 5 can be provided in multiple ways or in one way.

[0174] In some embodiments, such as Figure 14 and Figure 19 As shown, in the swing arm assembly 2, each gear 22 is provided with a second cam structure 5 between itself and the support member 23. With this design, when the swing arm 21 is in the unfolded position, each gear 22 can be subjected to the force applied by the corresponding second cam structure 5, which can generate a greater unfolding force to prevent the swing arm 21 from rotating to the folded position, thereby making the terminal device more stable in the unfolded state.

[0175] Of course, in the swing arm assembly 2, in addition to each gear 22 having a second cam structure 5 between it and the support member 23, a number of gears 22 may also have a second cam structure 5 between it and the support member 23. Specifically, in the swing arm assembly 2, the two outermost gears 22 are fixedly connected to the corresponding swing arms 21, and the gears 22 other than the two outermost gears 22 (e.g.) Figure 14 The two gears 22 located in the middle are slidably connected to the base 1 along their axial direction X, and a second cam structure 5 is provided between them and the support member 23. With this design, when the swing arm 21 rotates from the folded position to the unfolded position, the gears 22 connected to the swing arm 21 will not move axially X due to the force of the second cam structure 5, so that the swing arm 21 can rotate more smoothly relative to the base 1.

[0176] In some embodiments, such as Figures 10-14 As shown, in the swing arm assembly 2, the gear 22 is provided with a bearing member 23 on both sides. The first end face 221 and the second end face 222 are two opposite end faces of the gear 22. A first cam structure 4 is provided between the first end face 221 and the bearing member 23 on the corresponding side, and a second cam structure 5 is provided between the second end face 222 and the bearing member 23 on the corresponding side.

[0177] In this embodiment, the first cam structure 4 and the second cam structure 5 are distributed on both sides of the same gear 22, and the first cam structure 4 and the second cam structure 5 are arranged in the same swing arm assembly 2. In this way, the terminal device can achieve the dual functions of self-springing open in the folded state and maintaining a stable unfolded state through the same swing arm assembly 2.

[0178] In some embodiments, such as Figure 10 As shown, two swing arm assemblies 2 are provided between the first sub-base 13 and the second sub-base 14, namely swing arm assembly 2a and swing arm assembly 2b. Swing arm assembly 2a is located close to the first sub-base 13, and swing arm assembly 2b is located close to the second sub-base 14.

[0179] In the swing arm assembly 2a, the upper end face of the gear 22 is the first end face 221, the lower end face of the gear 22 is the second end face 222, a first cam structure 4 is provided between the upper end face of the gear 22 and the support member 23 located on the upper side of the gear 22, and a second cam structure 5 is provided between the lower end face of the gear 22 and the support member 23 located on the lower side of the gear 22.

[0180] In the swing arm assembly 2b, the upper end face of the gear 22 is the second end face 222, the lower end face of the gear 22 is the first end face 221, a second cam structure 5 is provided between the upper end face of the gear 22 and the support member 23 located on the upper side of the gear 22, and a first cam structure 4 is provided between the lower end face of the gear 22 and the support member 23 located on the lower side of the gear 22.

[0181] Among them, such as Figure 10 As shown, the elastic element 3 is a spring. The spring is in a compressed state and is sleeved on the mounting shaft 15 between the swing arm assembly 2a and the swing arm assembly 2b. One end of the elastic element 3 abuts against the bearing member 23 located below the gear 22 in the swing arm assembly 2a, and the other end of the elastic element 3 abuts against the bearing member 23 located above the gear 22 in the swing arm assembly 2b.

[0182] In some embodiments, such as Figure 10 As shown, in the swing arm assembly 2a, the support member 23 located on the upper side of the gear 22 is fixedly connected to the first sub-base 13. For example, the support member 23 located on the upper side of the gear 22 can be an integral structure with the first sub-base 13. The support member 23 located on the lower side of the gear 22 is provided with multiple through holes 231, and a mounting shaft 15 passes through each through hole 231.

[0183] In the swing arm assembly 2b, multiple through holes 231 are provided on the support member 23 located above and below the gear 22, and a mounting shaft 15 passes through each through hole 231. Among them, the support member 23 located below the gear 22 can be integrated with the second friction member 62 of the damping mechanism 6, which will be described in detail later.

[0184] like Figure 24 As shown, Figure 24 This is a schematic diagram showing the swing arm 21 of the rotating shaft mechanism 100 in the extended position in the second embodiment of this application. The main difference between the rotating shaft mechanism 100 in the second embodiment and the rotating shaft mechanism 100 in the first embodiment is that the first cam structure 4 and the second cam structure 5 are arranged differently.

[0185] In some embodiments, such as Figure 24 As shown, in the swing arm assembly 2 (such as the swing arm assembly 2 located on the upper side in the figure), the gear 22 is provided with a bearing member 23 on both sides. The gear 22 has two first end faces 221 arranged opposite to each other. Each first end face 221 is provided with a first cam structure 4 between it and the bearing member 23 on the corresponding side. That is, the two sides of the gear 22 are arranged on the first cam structure 4. In this way, when the swing arm 21 is in the folded position, the first cam structure 4 on both sides of the gear 22 can generate a larger spring force, so that the rotating shaft mechanism 100 can adapt to the terminal equipment that requires a larger torque to spring open.

[0186] When there are multiple rocker arm assemblies 2, the first cam structure 4 can be arranged on both sides of the gear 22 in a portion of the rocker arm assemblies 2, or the first cam structure 4 can be arranged on both sides of the gear 22 in each rocker arm assembly 2. No specific limitation is made here.

[0187] In some embodiments, such as Figure 24 As shown, there are multiple swing arm assemblies 2, which are arranged along the axial direction X of the gear 22. In a portion of the swing arm assemblies 2, a support member 23 is provided on both sides of the gear 22. The gear 22 has two opposing second end faces 222. A second cam structure 5 is provided between each second end face 222 and the corresponding support member 23. In another portion of the swing arm assemblies 2, a support member 23 is provided on both sides of the gear 22. The gear 22 has two opposing first end faces 221. A first cam structure 4 is provided between each first end face 221 and the corresponding support member 23.

[0188] In this embodiment, in the same set of swing arm assemblies 2, a first cam structure 4 or a second cam structure 5 is arranged on both sides of the gear 22. That is, the same type of cam structure is arranged on both sides of the gear 22. This ensures that the swing arm 21 can still rotate normally even when the gear 22 is installed in reverse. Therefore, it is not necessary to confirm the orientation of the gear 22 during assembly, which facilitates the assembly of the gear 22. In addition, since the second cam structure 5 is arranged on both sides of the gear 22 in a certain number of swing arm assemblies 2, the second cam structures 5 on both sides of the gear 22 can generate a greater unfolding force when the swing arm 21 is in the unfolded position, so as to prevent the terminal device from folding. This allows the rotating shaft mechanism 100 to adapt to terminal devices that require a larger torque to maintain the unfolded state.

[0189] For example, such as Figure 24 As shown, a rocker arm assembly 2a and a rocker arm assembly 2b are provided between the first sub-base 13 and the second sub-base 14. In the rocker arm assembly 2a, the upper end face and the lower end face of the gear 22 are both first end faces 221, and a first cam structure 4 is provided between the upper end face of the gear 22 and the support member 23 located on the upper side of the gear 22, and between the lower end face of the gear 22 and the support member 23 located on the lower side of the gear 22. In the rocker arm assembly 2b, the upper end face and the lower end face of the gear 22 are both second end faces 222, and a second cam structure 5 is provided between the upper end face of the gear 22 and the support member 23 located on the upper side of the gear 22, and between the lower end face of the gear 22 and the support member 23 located on the lower side of the gear 22.

[0190] like Figures 25-31 As shown, Figure 25 This is a schematic diagram of the swing arm 21 of the rotating shaft mechanism 100 in the extended position in the third embodiment of this application. Figure 26 This is a perspective view of the swing arm 21 of the rotating shaft mechanism 100 in the third embodiment of this application in the folded position. Figure 27 for Figure 26 A partial enlarged view of the rotating shaft mechanism 100 at point E. Figure 28 This is a perspective view of the swing arm 21 of the rotating shaft mechanism 100 in the third embodiment of this application in the extended position. Figure 29 for Figure 28 A partial enlarged view of the rotating shaft mechanism 100 at point F. Figure 30 This is a circumferential unfolded view of the first cam structure 4 between the four gears 22 and the support member 23 of the rocker arm assembly 2 in the third embodiment of this application when the rocker arm 21 is in different positions. Figure 31 for Figure 30 The circumferential unfolding of the first cam structure 4 between the rightmost gear 22 and the carrier 23 when the rocker arm 21 is in different positions.

[0191] The main difference between the rotating shaft mechanism 100 in the third embodiment of this application and the rotating shaft mechanism 100 in the first embodiment is that the structure of the first cam structure 4 is different.

[0192] There are multiple first protrusions 41, and these multiple first protrusions 41 are arranged circumferentially along the gear 22. For example... Figure 31 As shown, when the swing arm 21 is in the folded position, the second protrusion 42 abuts against the first side surface 411 of a first protrusion 41; when the swing arm 21 is in the unfolded position, the second protrusion 42 abuts against the first side surface 411 of another first protrusion 41.

[0193] Since the second protrusion 42 abuts against the first side 411 of the first protrusion 41 in the folded and unfolded positions of the swing arm 21, the second protrusion 42 and the first side 411 can exert an unfolding force on the swing arm 21 through the gear 22 under the elastic force of the elastic member 3 when the swing arm 21 is in the unfolded and folded positions. Thus, the first cam structure 4 can enable the terminal device to have the dual functions of self-springing open in the folded state and maintaining a stable unfolded state. That is, the first cam structure 4 in this embodiment has the effects of both the first cam structure 4 and the second cam structure 5, which makes the layout of the cam structure more compact and helps to reduce the size of the swing arm assembly 2 while achieving the same function.

[0194] In some embodiments, such as Figure 30 and Figure 31 As shown, the inclination angle of the second side 412 of the first protrusion 41 relative to the axial direction X of the gear 22 is greater than the inclination angle of the first side 411 relative to the axial direction X of the gear 22.

[0195] During the rotation of the swing arm 21 from the folded position to the unfolded position, with the gear 22 as a reference, the second protrusion 42 needs to pass over the first protrusion 41 along the second side 412 and then abut against the first side 411 of the first protrusion 41. Since the tilt angle of the second side 412 relative to the axial X of the gear 22 is greater than the tilt angle of the first side 411 relative to the axial X of the gear 22, that is, the second side 412 is flatter than the first side 411, this reduces the difficulty for the second protrusion 42 to pass over the first protrusion 41 and reduces the resistance when the second protrusion 42 "climbs" along the second side 412, so that the swing arm 21 can smoothly rotate from the folded position to the unfolded position, thereby ensuring that the terminal device can smoothly switch to the unfolded state.

[0196] In some embodiments, such as Figure 31 As shown, along the circumference of gear 22, the central angle corresponding to the distance between the first side surfaces 411 of two adjacent first protrusions 41 is 90 degrees.

[0197] During the process of the swing arm 21 rotating from the folded position to the unfolded position, it rotates 90 degrees. The gear 22, which is connected to the swing arm 21, also rotates 90 degrees, or a quarter turn. By setting the central angle corresponding to the distance between the first side surface 411 of two adjacent first protrusions 41 to 90 degrees, the second protrusion 42 can move from the first side surface 411 of one first protrusion 41 to the first side surface 411 of the adjacent first protrusion 41. This reduces the number of times the second protrusion 42 crosses the first protrusion 41, thereby reducing the rotational resistance of the swing arm 21 and making the process of switching the terminal device to the unfolded state smoother.

[0198] Specifically, the distance between the first side surfaces 411 of two adjacent first protrusions 41 refers to the distance between the same position on the first side surfaces 411 of two adjacent first protrusions 41. For example, if point O1 is located at the top of one first side surface 411 and point O2 is located at the top of an adjacent first side surface 411, then along the circumference of the gear 22, the distance between point O1 and point O2 is the distance between the first side surfaces 411 of two adjacent first protrusions 41.

[0199] In some embodiments, such as Figure 31 As shown, there are four first protrusions 41, and the four first protrusions 41 are arranged in a continuous manner.

[0200] "Continuous arrangement" means that in two adjacent first protrusions 41, the first side 411 of one first protrusion 41 is connected to the second side 412 of the other first protrusion 41.

[0201] In some embodiments, such as Figure 31 and Figure 32 As shown, Figure 32 This is a schematic diagram of the first cam structure 4 provided on the support member 23 in the rotating shaft mechanism 100 of the third embodiment of this application. There are multiple second protrusions 42, which are arranged circumferentially along the gear 22, and each second protrusion 42 can extend into the corresponding first notch 43.

[0202] By setting the number of second protrusions 42 to multiple, when the rocker arm 21 is in the folded and unfolded position, the multiple second protrusions 42 are respectively pressed against the corresponding first protrusions 41 to improve the contact stress between the protrusions, which is conducive to ensuring the normal and stable operation of the first cam structure 4, thereby effectively extending the service life of the first cam structure 4.

[0203] The number of second protrusions 42 is equal to the number of first protrusions 41, for example, such as Figure 31 As shown, the number of the second protrusion 42 is four, and the number of the first protrusion 41 is four.

[0204] In some embodiments, such as Figure 31 As shown, when the swing arm 21 is in the folded and unfolded positions, the second protrusion 42 is in surface contact with the first side surface 411. That is, the second protrusion 42 has a lateral plane, and when the swing arm 21 is in the folded and unfolded positions, the lateral plane of the second protrusion 42 is in surface contact with the first side surface 411. This design reduces the pressure exerted by the interaction between the second protrusion 42 and the first side surface 411, thereby reducing the probability of damage to the first protrusion 41 and the second protrusion 42.

[0205] In some embodiments, such as Figures 25-29 As shown, there are multiple swing arm assemblies 2, which are arranged along the axial direction X of the gear 22. In a portion of the swing arm assemblies 2, a support member 23 is provided on both sides of the gear 22. The gear 22 has a first end face 221 and a second end face 222 that are arranged opposite to each other. A first cam structure 4 is provided between the first end face 221 and the support member 23 on the corresponding side, and a second cam structure 5 is provided between the second end face 222 and the support member 23 on the corresponding side. In another portion of the swing arm assemblies 2, a support member 23 is provided on both sides of the gear 22. The gear 22 has two first end faces 221 that are arranged opposite to each other. A first cam structure 4 is provided between each first end face 221 and the support member 23 on the corresponding side.

[0206] In some embodiments, such as Figure 25 As shown, in the rocker arm assembly 2 with the first cam structure 4, a first cam structure 4a is provided between one first end face 221 of the gear 22 and the corresponding support member 23, and a first cam structure 4b is provided between the other first end face 221 of the gear 22 and the corresponding support member 23.

[0207] It should be noted that, for the purpose of differentiation, the first cam structure 4 (e.g., when the rocker arm 21 is in the folded position and the unfolded position, the second protrusion 42 extends into the same first notch 43) will be used. Figures 10-18 The first cam structure 4 shown is referred to as the first cam structure 4a; the first cam structure 4a that satisfies the condition that "when the rocker arm 21 is in the folded position, the second protrusion 42 abuts against the first side surface 411 of one first protrusion 41; when the rocker arm 21 is in the unfolded position, the second protrusion 42 abuts against the first side surface 411 of another first protrusion 41" is referred to as the first cam structure 4a. Figures 25-32 The first cam structure 4 shown is called the first cam structure 4b.

[0208] For example, such as Figure 25As shown, a rocker arm assembly 2a and a rocker arm assembly 2b are provided between the first sub-base 13 and the second sub-base 14. In the rocker arm assembly 2a, the upper end face of the gear 22 is the first end face 221, and the lower end face of the gear 22 is the second end face 222. A first cam structure 4a is provided between the upper end face of the gear 22 and the support member 23 located on the upper side of the gear 22, and a second cam structure 5 is provided between the lower end face of the gear 22 and the support member 23 located on the lower side of the gear 22. In the rocker arm assembly 2b, both the upper end face and the lower end face of the gear 22 are the first end face 221. A first cam structure 4b is provided between the upper end face of the gear 22 and the support member 23 located on the upper side of the gear 22, and a first cam structure 4a is provided between the lower end face of the gear 22 and the support member 23 located on the lower side of the gear 22.

[0209] In some embodiments, such as Figure 28 , Figures 33-35 As shown, Figure 33 for Figure 28 An exploded view of the damping mechanism 6 of the rotating shaft mechanism 100 shown. Figure 34 for Figure 28 The cross-sectional view of the rotating shaft mechanism 100 at EE after removing the connecting bracket 400 is shown. Figure 35 for Figure 26 The diagram shows a cross-sectional view of the rotating shaft mechanism 100 at point FF after the connecting frame 400 is removed. The rotating shaft mechanism 100 in this embodiment further includes a damping mechanism 6, which includes a first friction element 61 and a second friction element 62. The first friction element 61 is rotatably connected to the base 1 and is connected to the swing arm 21 via a connecting member 63, allowing the first friction element 61 and the swing arm 21 to rotate synchronously relative to the base 1. The second friction element 62 is disposed on the base 1 and contacts the first friction element 61; when the swing arm 21 rotates between the folded position and the unfolded position, the second friction element 62 can rub against the first friction element 61 to apply a rotational damping force to the swing arm 21.

[0210] By incorporating a damping mechanism 6, the damping mechanism 6 can provide rotational damping force opposite to the direction of movement of the swing arm 21 when it rotates between the folded and unfolded positions. This allows the housing 300 connected to the swing arm 21 to be suspended in an intermediate position between the unfolded and folded states, enabling the terminal device to be unfolded at a suitable angle for user convenience. Simultaneously, the damping mechanism 6 provides rotational damping force through the contact friction between the first friction element 61 and the second friction element 62. This simplifies the structure of the damping mechanism 6, and if either the first friction element 61 or the second friction element 62 is damaged, it can be replaced individually without replacing the entire damping mechanism 6, thus reducing maintenance costs.

[0211] The arrangement of the first friction element 61 and the second friction element 62 is not unique. Figures 33-35 A first embodiment of the arrangement of the first friction element 61 and the second friction element 62 is shown. In this embodiment, there are multiple first friction elements 61 and multiple second friction elements 62. The multiple first friction elements 61 and multiple second friction elements 62 are arranged along the axial direction X of the gear 22. A first gap 60 is formed between two adjacent second friction elements 62. Each first friction element 61 is inserted into the corresponding first gap 60 and is in contact with the adjacent second friction element 62.

[0212] This design allows the first friction element 61 to rub against the adjacent second friction element 62, providing rotational damping force to the swing arm 21 throughout its rotation between the folded and unfolded positions. This not only suspends the housing 300 connected to the swing arm 21 in an intermediate position between the unfolded and folded states, but also prevents the housing 300 from opening too quickly due to the spring-opening force provided by the first cam structure 4, thus making the movement of the housing 300 smoother. Furthermore, by adjusting the number of the first and second friction elements 61 and 62, the frictional force generated between the elements can be changed (e.g., increasing the number of elements to increase the frictional force). This allows the rotational damping mechanism 6 to be adapted to terminal devices requiring different rotational damping forces, improving its versatility.

[0213] In some embodiments, such as Figure 28 and Figure 33 As shown, the swing arm 21 includes two sub-swing arms 211, each rotatably connected to the base 1. The two sub-swing arms 211 are arranged at intervals along the axial direction X of the gear 22 and are connected by a connector 63, so that the two sub-swing arms 211 can rotate synchronously relative to the base 1. One sub-swing arm 211 is connected to the gear 22 for transmission. A first friction member 61 is disposed between the two sub-swing arms 211 and connected to the connector 63, and a second friction member 62 is disposed between the gear 22 and the limiting part on the base 1.

[0214] By placing the first friction element 61 between the two sub-arms 211 and the second friction element 62 between the gear 22 and the limiting part on the base 1, the two sub-arms 211 can limit the first friction element 61, preventing it from moving along the axial direction X of the gear 22. The limiting part on the gear 22 and the base 1 can limit the second friction element 62, thereby ensuring a certain contact pressure between the first friction element 61 and the second friction element 62 and guaranteeing the magnitude of the friction force between them.

[0215] The connector 63 can be connected between the two sub-swing arms 211 by one of the following methods: snap-fit, plug-in, hinge, screw-in, etc. The connector 63 can be rod-shaped or other shapes, and no specific limitation is made here.

[0216] For example, such as Figure 28 , Figure 33 and Figure 34 As shown, the connector 63 is rod-shaped, and one end of the connector 63 is inserted into a hole on a sub-swing arm 211, while the other end of the connector 63 is inserted into a hole on another sub-swing arm 211.

[0217] The first friction element 61 can be installed in the following way: the first friction element 61 has first mounting holes 611 at both ends, the first mounting hole at one end of the first friction element 61 cooperates with the connector 63; the first mounting hole 611 at the other end of the first friction element 61 is rotatably engaged with the mounting shaft 15 so that the first friction element 61 is rotatably connected to the base 1.

[0218] The second friction member 62 can be installed in the following way: the second friction member 62 is provided with a plurality of third mounting holes 621 along the width direction Y of the base 1, each third mounting hole 621 is respectively engaged with the corresponding mounting shaft 15, and the second friction member 62 is located between the gear 22 and the second sub-base 14, wherein the second sub-base 14 is the limiting part of the base 1.

[0219] In some embodiments, such as Figure 28 and Figure 33 As shown, both the first friction element 61 and the second friction element 62 are friction plates, and the portions of the multiple first friction elements 61 near the base 1 are staggered and stacked with the multiple second friction elements 62. In this way, the first friction element 61 is in surface contact with the adjacent first friction element 61, which can provide a large rotational damping force.

[0220] Of course, the first friction element 61 and the second friction element 62 are not limited to being sheet-like. The first friction element 61 and the second friction element 62 can also be set in other shapes, such as rod-like shapes, depending on the actual situation.

[0221] Figures 36-39 A second embodiment of the arrangement of the first friction member 61 and the second friction member 62 is shown. Figure 36 This is a schematic diagram of another structure of the damping mechanism 6 in the rotating shaft mechanism 100 in the embodiments of this application. Figure 37 for Figure 36 A schematic diagram showing the positional relationship between the first friction element 61 and the second friction element 62 during rotation. Figure 38 for Figure 37 A partial enlarged view of the connection between the first friction element 61 and the second friction element 62. Figure 39This is a schematic diagram of the third structure of the damping mechanism 6 in the rotating shaft mechanism 100 in the embodiments of this application.

[0222] In this embodiment, the first friction member 61 includes an elastic portion 612, on which a flat hole 613 is provided. The wall of the flat hole 613 has a first plane 6131 along its circumferential direction. The second friction member 62 is a flat shaft disposed on the base 1. Along the circumferential direction of the flat shaft, the flat shaft is fixed relative to the base 1, and the flat shaft has a second plane 622 and a third plane 623 disposed at intervals. The flat shaft passes through the flat hole 613. Figure 37 and Figure 38 As shown, when the swing arm 21 is in the folded position, the first plane 6131 and the second plane 622 are arranged opposite to each other; when the swing arm 21 is in the unfolded position, the first plane 6131 and the third plane 623 are arranged opposite to each other.

[0223] The relative arrangement of the first plane 6131 and the second plane 622 means that the first plane 6131 and the second plane 622 are parallel or approximately parallel (for example, the deviation is within 5 degrees); the relative arrangement of the first plane 6131 and the third plane 623 means that the first plane 6131 and the third plane 623 are parallel or approximately parallel (for example, the deviation is within 5 degrees).

[0224] Since the flat shaft is fixed relative to the base 1 along its circumference, the flat shaft passes through the flat hole 613, such as Figure 37 and Figure 38 As shown, when the swing arm 21 rotates between the folded position and the unfolded position, the first friction member 61 rotates relative to the flat shaft. As the first plane 6131 of the flat hole 613 moves relative to the second plane 622 on the flat shaft, the corner portion m1 on the flat shaft located at the edge of the second plane 622 is pressed against the hole wall of the flat hole 613. In this way, the flat shaft and the hole wall of the flat hole 613 rub against each other to provide rotational damping force to the swing arm 21.

[0225] In this embodiment, when the swing arm 21 is in the folded position, the first plane 6131 and the second plane 622 are opposite to each other, and when the swing arm 21 is in the unfolded position, the first plane 6131 and the third plane 623 are opposite to each other. This ensures a stable fit between the second friction member 62 (flat shaft) and the flat hole 613 when the swing arm 21 is in the folded and unfolded positions, thus keeping the first friction member 61 stably in both positions and guaranteeing the stability of the terminal device in both folded and unfolded states. Furthermore, this embodiment provides rotational damping force to the swing arm 21 through the friction of the first friction member 61 rotating relative to the second friction member 62. Since the second friction member 62 is a flat shaft mounted on the base 1, and the elastic part 612 of the first friction member 61 is sleeved on the second friction member 62, this arrangement makes the first friction member 61 and the second friction member 62 more compact and occupies less space.

[0226] In some embodiments, such as Figure 37 and Figure 38 As shown, when the swing arm 21 is in the folded position, there is a second gap 64 between the first plane 6131 and the second plane 622. Thus, when the swing arm 21 rotates to near the folded position (e.g., within a preset angle from the folded position), there is sufficient space at the position of the second plane 622 to avoid the corner m1 of the edge of the second plane 622 from being squeezed against the wall of the flat hole 613. Therefore, when the swing arm 21 rotates to near the folded position, no friction is generated between the first friction member 61 and the second friction member 62, meaning no rotational damping force is provided to the swing arm 21. This facilitates the first cam structure 4 in springing open the housing 300 of the terminal device. This embodiment is suitable for situations where the springing force provided by the first cam structure 4 is relatively small.

[0227] In some embodiments, such as Figure 37 and Figure 38 As shown, when the swing arm 21 is in the unfolded position, there is a third gap 65 between the first plane 6131 and the third plane 623. Thus, when the swing arm 21 rotates to near the unfolded position (e.g., within a preset angle from the unfolded position), there is sufficient space at the position of the third plane 623 to avoid the corner m1 of the edge of the second plane 622 from being pressed against the wall of the flat hole 613. Therefore, when the swing arm 21 rotates to near the folded position, no friction is generated between the first friction member 61 and the second friction member 62, meaning no rotational damping force is provided to the swing arm 21. This facilitates the second cam structure 5 in maintaining the terminal device in the unfolded state. This embodiment is suitable for situations where the unfolding force provided by the second cam structure 5 is relatively small.

[0228] The preset angle can be 10 degrees, but it is not limited to this; it can also be 5 degrees, 8 degrees, etc., depending on the actual situation. When the preset angle is 10 degrees, the opening and closing angle of the two housings of the terminal device is 300 degrees. Figure 2 When the angle between the first display area 210 and the second display area 220 is between 20° and 160°, the corner portion m1 is pressed against the wall of the flat hole 613. The pressing force between the corner portion m1 and the wall of the flat hole 613 increases from 20° to 90° and decreases from 90° to 160°. When the opening angle of the two housings 300 of the upper terminal device is 90°, the pressing force between the corner portion m1 and the wall of the flat hole 613 is at its maximum, providing the greatest rotational damping force.

[0229] Of course, in other embodiments, when the swing arm 21 is in the folded position, the first plane 6131 is in contact with the second plane 622; when the swing arm 21 is in the unfolded position, the first plane 6131 is in contact with the third plane 623. Thus, during the entire rotation of the swing arm 21 between the folded and unfolded positions, the corner portion m1 will press against the wall of the flat hole 613 to provide rotational damping force to the swing arm 21, thereby preventing the terminal device from opening too quickly under the action of the first cam structure 4 and unfolding too quickly under the action of the second cam structure 5. This embodiment is suitable for situations where the opening force provided by the first cam structure 4 is large, and the unfolding force provided by the second cam structure 5 is large.

[0230] In some embodiments, such as Figure 36 As shown, the elastic part 612 is formed from the first friction member 61 by a rolling process. Compared with the elastic part 612 and the main body of the first friction member 61 being separately set, the elastic part 612 is formed by a rolling process, which reduces the assembly process of the elastic part 612. This not only helps to improve the assembly efficiency of the damping mechanism 6, but also improves the connection reliability between the elastic part 612 and the main body of the first friction member 61.

[0231] In some embodiments, such as Figure 39 As shown, the first friction element 61 has a sheet-like structure, and there are multiple first friction elements 61 stacked together. Each first friction element 61 has a notch 614 at the flat hole 613 to break the hole wall of the flat hole 613. The notches 614 of the multiple first friction elements 61 form a groove 615 extending along the axial direction X of the flat axis. Compared with the elastic part 612 being formed by a rolling process, the solution in this embodiment is equivalent to... Figure 36The elastic part 612 shown (that is, the rolled structure) is divided into multiple stacked sheet-like structures. In this way, the flat hole 613 of the sheet-like elastic part 612 can be formed by stamping process instead of rolling process, which helps to reduce the processing difficulty and cost of the flat hole 613 of the elastic part 612.

[0232] In some embodiments, such as Figure 36 and Figure 39 As shown, the second friction element 62 and the mounting shaft 15 are an integral structure. Of course, the second friction element 62 can also be set separately from the mounting shaft 15, depending on the actual situation.

[0233] As for the connection relationship between the first friction element 61 and the swing arm 21, please refer to Figures 33-35 The connection between the first friction member 61 and the swing arm 21 in the embodiment shown is set, and will not be described again here.

[0234] In some embodiments, such as Figures 40-43 As shown, Figure 40 This is a schematic diagram of the structure of the rotating shaft mechanism 100 in some embodiments of this application. Figure 41 for Figure 40 A partially enlarged view of the position of the torsion spring in the rotating shaft mechanism 100 shown. Figure 42 for Figure 40 A cross-sectional view of the rotating shaft mechanism 100 at point HH. Figure 43 This is a diagram showing the state of the torsion spring during the rotation of the swing arm 21 according to an embodiment of this application. The swing arm 21 is rotatably connected to the base 1 via a rotating shaft 24. A torsion spring 7 is sleeved on the rotating shaft 24, and the first connecting arm 71 of the torsion spring 7 is connected to the swing arm 21.

[0235] Among them, such as Figure 41 As shown, the first connecting arm 71 is inserted into the hole opened on the swing arm 21 to connect the first connecting arm 71 to the swing arm 21. However, it is not limited to this; the first connecting arm 71 can also be connected to the swing arm 21 by snap-fit ​​or other means, depending on the actual situation. The rotating shaft 24 and the mounting shaft 15 of the base 1 can be an integral structure or a separate design; no specific limitation is made here.

[0236] The base 1 is provided with a stop 16, such as Figure 43 As shown, when the swing arm 21 is in the unfolded position, the second connecting arm 72 separates from the stop part 16, so that the torsion spring 7 is in its natural state; when the swing arm 21 rotates between the intermediate position and the folded position, the second connecting arm 72 of the torsion spring 7 abuts against the stop part 16, so that the torsion spring 7 is in a stored state, so as to apply a force to the swing arm 21 that can drive the swing arm 21 to rotate to the unfolded position; wherein, the intermediate position is the position between the folded position and the unfolded position along the rotation direction of the swing arm 21.

[0237] By setting the torsion spring 7, when the swing arm 21 is in the folded state, the torsion spring 7 can apply a force to the swing arm 21 that can drive the swing arm 21 to rotate to the unfolded position, so as to assist the unfolding of the housing 300 of the terminal device. The combination of the torsion spring 7 and the first cam structure 4 can provide a greater unfolding force, making the rotating shaft mechanism 100 suitable for terminal devices that require a larger unfolding force.

[0238] Meanwhile, when the swing arm 21 rotates between the middle position and the folded position, the torsion spring 7 abuts against the stop part 16. That is, the torsion spring 7 abuts against the stop part 16 within a certain range of the entire rotation of the swing arm 21 towards the folded position. This can reduce the amount of deformation of the torsion spring 7 when the swing arm 21 is in the folded position, thereby reducing the magnitude of the reaction force of the swing arm 21 and the stop part 16 on the torsion spring 7. As a result, the torsion spring 7 is not easily damaged due to excessive reaction force, thus extending the service life of the torsion spring 7.

[0239] The structure of the stop portion 16 described above is not unique; in some embodiments, such as... Figure 41 , Figure 42 and Figure 43 As shown, the stop part 16 is a stop surface provided on the base 1. There is a movement space 17 between the stop surface and the torsion spring 7, which allows the second connecting arm 72 to swing. During the rotation of the swing arm 21, the second connecting arm 72 can move in the movement space 17.

[0240] like Figure 43 As shown, when the swing arm 21 is in the unfolded position, the second connecting arm 72 is located in the motion space 17, and there is a distance between the second connecting arm 72 and the stop surface. At this time, the torsion spring 7 does not deform and is in a natural state. When the swing arm 21 rotates between the middle position and the folded position, the second connecting arm 72 abuts against the stop surface, and the torsion spring 7 deforms to be in a stored state, so as to apply a force to the swing arm 21 that can drive the swing arm 21 to rotate to the unfolded position.

[0241] By setting the stop surface on the base 1 as the stop part 16, the structure on the base 1 can be fully utilized, making the structure of the stop part 16 simpler and eliminating the need to install other parts on the base 1, which helps to reduce costs.

[0242] Among them, the motion space 17 is the space located between the stop surface and the torsion spring 7, for example... Figure 41 and Figure 42 As shown, the motion space 17 can be a cavity on the base 1, the stop part 16 is the cavity wall of the cavity, and the side of the cavity near the torsion spring 7 has an insertion port for the second connecting arm 72 to extend into.

[0243] In other embodiments, such as Figure 44 and Figure 45 As shown, Figure 44 This is a cross-sectional view of the base 1 of the rotating shaft mechanism 100 in some embodiments of this application, located near the torsion spring 7. Figure 45 This is a diagram showing the position of the second connecting arm 72 of the torsion spring 7 in this embodiment of the application during the rotation of the swing arm 21. An arc-shaped groove 18 is provided on the base 1 for the second connecting arm 72 to extend into. The arc-shaped groove 18 extends circumferentially along the gear 22, and one end of the groove wall of the arc-shaped groove 18 is a stop portion 16.

[0244] like Figure 45 As shown, when the swing arm 21 is in the unfolded position, the second connecting arm 72 is located at the lower end of the arc groove 18. At this time, the torsion spring 7 does not deform and is in a natural state. When the swing arm 21 rotates between the middle position and the folded position, the second connecting arm 72 abuts against the groove arm at the upper end of the arc groove 18, and the torsion spring 7 deforms to be in a stored state, so as to apply a force to the swing arm 21 that can drive the swing arm 21 to rotate to the unfolded position.

[0245] By setting the groove wall of the arc-shaped groove 18 on the base 1 as the stop part 16, the structure on the base 1 can be fully utilized, making the structure of the stop part 16 simpler and eliminating the need to install other parts on the base 1, which helps to reduce costs. At the same time, the arc-shaped groove 18 can also guide the movement of the second connecting arm 72, reducing the swaying of the second connecting arm 72 during movement, thereby making the movement of the second connecting arm 72 more stable.

[0246] In some embodiments, such as Figure 44 As shown, the swing arm 21 includes two sub-swing arms 211, which are arranged at intervals along the axial direction X of the gear 22 and connected by a connector 63, so that the two sub-swing arms 211 can rotate synchronously relative to the base 1. The two sub-swing arms 211 are a first sub-swing arm 211a and a second sub-swing arm 211b, respectively. The first sub-swing arm 211a is connected to the gear 22 for transmission. The torsion spring 7 is located on the side of the second sub-swing arm 211b away from the first sub-swing arm 211a, and the second connecting arm 72 of the torsion spring 7 is connected to the second sub-swing arm 211b. By setting the torsion spring 7 on the side of the second sub-swing arm 211b away from the first sub-swing arm 211a, the torsion spring 7 is positioned away from the gear 22, avoiding structural interference between the torsion spring 7 and the gear 22, the bearing member 23, etc.

[0247] The connector 63 can be connected between the two sub-swing arms 211 by one of the following methods: snap-fit, plug-in, hinge, screw-in, etc. The connector 63 can be rod-shaped or other shapes, and no specific limitation is made here.

[0248] For example, such as Figure 44As shown, the connector 63 is rod-shaped, and one end of the connector 63 is inserted into a hole on a sub-swing arm 211, while the other end of the connector 63 is inserted into a hole on another sub-swing arm 211.

[0249] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0250] The pivot mechanism 100 in this embodiment is not limited to terminal devices, but can also be applied to products that need to be unfolded and folded in the fields of automobiles, aircraft, home appliances, and consumer electronics.

[0251] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A rotating shaft mechanism (100), characterized in that, include: Base (1), bearing component (23), swing arm (21), elastic component (3); The swing arm (21) includes a first swing arm and a second swing arm, which are rotatably connected to both sides of the base (1). The first swing arm and the base (1) are rotatably connected by a first rotating shaft (15). The bearing member (23), the swing arm (21), and the elastic member (3) are arranged sequentially along a first direction, which is the axial direction parallel to the first rotating shaft (15); The support member (23) has a first cam surface at one end facing the swing arm (21), and the swing arm (21) has a second cam surface at one end facing the support member (23); The first cam surface includes a first protrusion, a first connecting portion, a first recess, a second connecting portion, a second protrusion, a third connecting portion, and a second recess arranged continuously along the first rotating shaft (15) in the circumferential direction, wherein the first protrusion and the second protrusion are closer to the elastic member (3) than the first recess and the second recess, and the surfaces of the first connecting portion, the second connecting portion, and the third connecting portion are not parallel to the first direction; The second cam surface includes a third protrusion (42); When the rotating shaft mechanism (100) is in a folded state, the third protrusion (42) abuts against the surface of the first connecting part; When the rotating shaft mechanism (100) is in the unfolded state, the third protrusion (42) abuts against the surface of the first recess; When the third protrusion moves along the first cam surface and in the direction of the first connecting portion toward the first recess, the rotating shaft mechanism (100) moves from the folded state to the unfolded state.

2. The rotating shaft mechanism (100) according to claim 1, characterized in that, The rotating shaft mechanism (100) also includes a first friction element (61) and a second friction element (62); The first friction element (61) is rotatably connected to the base (1), and the first friction element (61) is connected to the swing arm (21) through the connector (63), so that the first friction element (61) and the swing arm (21) can rotate synchronously relative to the base (1); The second friction element (62) is fixedly connected to the base (1) and is in contact with the first friction element (61); when the swing arm (21) rotates between the folded state and the unfolded state, the second friction element (62) can rub against the first friction element (61) to apply rotational damping force to the swing arm (21).

3. The rotating shaft mechanism (100) according to claim 2, characterized in that, The number of the first friction element (61) and the second friction element (62) are both multiple. The multiple first friction elements (61) include a first sub-friction element and a second sub-friction element, and the multiple second friction elements (62) include a third sub-friction element and a fourth sub-friction element. Along the first direction, the first sub-friction member, the third sub-friction member, the second sub-friction member, and the fourth sub-friction member are arranged in sequence, with adjacent sub-friction members in contact with each other.

4. The rotating shaft mechanism (100) according to claim 2, characterized in that, The axis of rotation of the first friction element (61) relative to the base (1) is the same as the axis of the first rotating shaft (15).

5. The rotating shaft mechanism (100) according to any one of claims 1-4, characterized in that, During the transition between the folded state and the unfolded state of the rotating shaft mechanism (100), the third protrusion moves along the first cam surface between the first connecting portion and the first recess, and the swing arm moves relative to the base (1) in a first direction.

6. The rotating shaft mechanism (100) according to any one of claims 1-4, characterized in that, The first cam surface includes four protrusions, the four protrusions including the first protrusion and the second protrusion, the first protrusion and the second protrusion being adjacent to each other.

7. The rotating shaft mechanism (100) according to any one of claims 1-4, characterized in that, Along the circumference of the first rotating shaft (15), the distance between the surface of the first connecting part and the surface of the third connecting part from the central angle of the first rotating shaft (15) is 90 degrees.

8. The rotating shaft mechanism (100) according to any one of claims 1-4, characterized in that, The tilt angle of the surface of the second connecting part relative to the first direction is greater than the tilt angle of the surface of the first connecting part relative to the first direction; The tilt angle of the surface of the second connecting part relative to the first direction is greater than the tilt angle of the surface of the third connecting part relative to the first direction.

9. The rotating shaft mechanism (100) according to any one of claims 1-4, characterized in that, The tilt angle of the surface of the first connecting part relative to the first direction is the same as the tilt angle of the surface of the third connecting part relative to the first direction.

10. The rotating shaft mechanism (100) according to any one of claims 1-4, characterized in that, When the rotating shaft mechanism (100) is in a folded state and no external force is applied, the third protrusion moves along the first cam surface in the direction from the first protrusion toward the second protrusion, causing the rotating shaft mechanism (100) to unfold.

11. The rotating shaft mechanism (100) according to any one of claims 1-4, characterized in that, The first cam surface is part of the rocker arm, and the second cam surface is part of the carrier.

12. An electronic device, characterized in that, The device includes a display screen (200), a housing, and a pivot mechanism (100) according to any one of claims 1 to 11, wherein the housing and the display screen (200) are stacked together; The housing includes a first housing and a second housing, which are located on both sides of the rotating shaft mechanism (100) and are movably connected through the rotating shaft mechanism (100); When the electronic device is in the unfolded state, the first housing, the rotating shaft mechanism (100), and the second housing are arranged sequentially along the direction from the first housing to the second housing; The first housing, the pivot mechanism (100), and the second housing form a support surface for supporting the display screen (200). The first swing arm is movably connected to the first housing, and the second swing arm is movably connected to the second housing.

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