WO2021136028A1

WO2021136028A1 - Hinge device and foldable terminal

Info

Publication number: WO2021136028A1
Application number: PCT/CN2020/138530
Authority: WO
Inventors: 饶迎春
Original assignee: 华为技术有限公司
Priority date: 2019-12-31
Filing date: 2020-12-23
Publication date: 2021-07-08
Also published as: CN113124042A; CN113124042B

Abstract

A hinge device (3) and a foldable terminal, related to the technical field of connectors and used for increasing a torque difference between positive rotation and reversing rotation. The hinge device comprises a rotating shaft (32), a first mounting bracket (31), a second mounting bracket (33), and a friction assembly (34). The first mounting bracket (31) is fixedly connected to the rotating shaft (32), and the second mounting bracket (33) is rotatably connected to the rotating shaft (32). The friction assembly (34) comprises a friction member (341) and a unidirectional rotation mechanism. The friction member (341) is in frictional contact with the second mounting bracket (33) and can positively rotate with the second mounting bracket (33) around the axis of the rotating shaft (32). The unidirectional rotation mechanism is mounted on the rotating shaft (32) and is fixedly connected to the friction member (341) for limiting the friction member (341) to reversely rotate with the second mounting bracket (33). According to the hinge device, the torque difference between positive rotation and reversing rotation is relatively high, and the design purpose of "open light, close heavy" can be realized, thereby improving user experience.

Description

Hinge device and folding terminal

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201911420475.5, and the application name is "Hinge Device and Folding Terminal" on December 31, 2019, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the technical field of connectors, in particular to a hinge device and a folding terminal.

Background technique

The notebook computer includes a host part and a display part, which are connected by a hinge device. The user applies an external force to the display part or the host part, and the display part can be opened relative to the host part, or the display part can be buckled on the host part. The hinge device is a key component for realizing the opening and closing of the above-mentioned display part relative to the host part. As consumers pay more and more attention to the hand feel experience, the design demand of "open light and close heavy" is gradually rising. "Open light and close heavy" means that the torque required for opening of the display unit relative to the main unit is smaller than the torque required for closing, which is more in line with usage habits and ergonomics.

In order to realize the design goal of "open light and close heavy" of the notebook computer, it is necessary for the hinge device to have different torques during forward and reverse rotation. In the related art, the hinge device is usually a covering type rotating shaft, and the covering type rotating shaft includes a sheet metal coil and a rotating shaft that rotates in the sheet metal coil. The inner wall of the sheet metal roll circle and the rotating shaft has a gradually changing diameter around the rotating shaft. When the rotating shaft rotates in the forward direction in the direction in which the diameter of the sheet metal coil becomes smaller, the rotating shaft rubs against the inner wall of the sheet metal coil, and the torque is large; when the rotating shaft rotates in the reverse direction, due to the tendency of the sheet metal diameter to become larger, the rotating shaft and the sheet metal coil The inner wall of the circle has friction and the torque is small, so that the hinge device has different torques when rotating forward and backward.

However, the torque difference of the wrapped shaft during forward rotation and reverse rotation depends on the diameter change of the inner wall of the sheet metal coil, and the diameter change of the inner wall of the sheet metal coil is usually small due to the limitation of the structure, which leads to the forward and reverse rotation. The torque difference during reversal is small, the "open light and close heavy" feel is closer, and the operating experience is poor.

Summary of the invention

The embodiments of the present application provide a hinge device and a folding terminal, which are used to increase the torque gap between the forward and reverse rotation of the hinge device, and improve the operating experience of "open light and close heavy".

In the first aspect, an embodiment of the present application provides a hinge device, including a rotating shaft, a first mounting bracket, a second mounting bracket, and a friction component; the first mounting bracket is fixedly connected to the rotating shaft, and the second mounting bracket is rotatably connected to the rotating shaft; The friction component includes a friction member and a one-way rotating mechanism. The friction member is in frictional contact with the second mounting bracket and can follow the second mounting bracket to rotate in the positive direction around the axis of the rotating shaft; the one-way rotating mechanism is installed on the rotating shaft and fixedly connected with the friction member. To restrict the friction member to follow the second mounting bracket to rotate in the reverse direction.

Using the hinge device designed as above, when the second mounting bracket rotates positively relative to the shaft, the second mounting bracket drives the friction member to follow the second mounting bracket through the contact friction force between the second mounting bracket and the friction member, that is, the friction member is moved by the second mounting bracket. The frictional force between the mounting bracket and the friction member is driven; when the second mounting bracket rotates in the reverse direction relative to the rotating shaft, the friction member cannot rotate in the reverse direction with the second mounting bracket due to the one-way rotation mechanism, in order to reverse the direction relative to the rotating shaft. To rotate, the force acting on the second mounting bracket needs to be increased to overcome the friction between the second mounting bracket and the friction member, so that the second mounting bracket and the friction member move relative to each other, so that the second mounting bracket and the friction member move relative to each other. The torque between the rotating shafts increases, that is, the torque when the second mounting bracket moves in the reverse direction relative to the rotating shaft is significantly greater than the torque when the second mounting bracket rotates in the forward direction relative to the rotating shaft. Therefore, when the folding terminal adopts the above-mentioned hinge device, the torque required to open the folding terminal can be significantly less than the torque required to close the folding terminal. The torque difference is large, and the design goal of "open light and close heavy" can be realized. , Improve the user experience.

In a possible implementation manner, the one-way rotation mechanism includes a rolling cavity provided in the friction member, and a rolling member provided in the rolling cavity, the rolling member and the outer circumferential surface of the rotating shaft Friction contact; the rolling cavity includes a first cavity that allows the rolling element to follow the rotation of the shaft, and a second cavity that prevents the rolling element to follow the rotation of the shaft.

In a possible implementation manner, the first cavity includes a revolving side wall, and the revolving side wall forms a rotation area not smaller than the outer circumferential surface of the rolling element; the second cavity includes The side wall is connected with a rotation-stop side wall, and the rotation side wall forms a non-rotation area smaller than the outer circumferential surface of the rolling element.

In a possible implementation manner, the revolving side wall is an arc-shaped side wall adapted to the outer circumferential surface of the rolling element.

In a possible implementation, the revolving side wall includes at least two first plane side walls parallel to the rotation axis of the rolling element connected; the included angle between adjacent first plane side walls At least 90 degrees.

In a possible implementation, the rotation stop side wall includes at least two second planar side walls parallel to the rotation axis of the rolling element connected; a clamp between adjacent second planar side walls The angle is less than 90 degrees.

In a possible implementation manner, the rotation stop side wall includes two second planar side walls, and is a V-shaped structure formed by the two second planar side walls with an opening facing the revolving side wall.

In a possible implementation manner, the surface of the anti-rotation side wall in contact with the rolling element is provided with a plurality of convex points. Such a design can further increase the friction between the anti-rotation side wall and the rolling element, and improve the stopping effect.

In a possible implementation, the friction component further includes a first elastic member disposed in the rolling cavity, and the first elastic member presses the rolling member into the second cavity. With such a design, the first elastic member always presses the rolling member toward the second cavity to assist the movement of the rolling cavity, so as to achieve the purpose of stopping rotation in time.

In a possible implementation manner, the rolling element is a cylinder, and the axis of the cylinder is parallel to the axis of the rotating shaft.

In a possible implementation manner, the rolling element is a round ball.

In a possible implementation manner, the friction member is provided with a first rotation hole that rotatably cooperates with the rotation shaft; the rolling cavity has a connection port that penetrates the first rotation hole on a side close to the rotation shaft The rolling element protrudes from the connecting port and is in frictional contact with the rotating shaft.

In a possible implementation manner, a plurality of the rolling cavities are evenly arranged around the outer circumferential surface of the rotating shaft. A plurality of evenly arranged rolling cavities can improve the stability of mutual cooperation.

In a possible implementation manner, the friction member is provided with a first rotation hole that is rotatably matched with the rotation shaft; the one-way rotation mechanism is provided between the first rotation hole and the rotation shaft. A ratchet mechanism, the ratchet mechanism includes a ratchet provided on the inner surface of the first rotating hole, a pawl provided on the rotating shaft, and a second elastic member acting on the pawl, the pawl Driven by the second elastic member, contact with the ratchet tooth.

In a possible implementation manner, the friction member is sleeved on the rotating shaft, and the one-way rotating mechanism is a one-way bearing provided between the friction member and the rotating shaft.

In a possible implementation manner, the second mounting bracket includes a connecting plate rotatably mounted on the rotating shaft; the hinge device further includes a clamping member sleeved on the rotating shaft, and the friction component is clamped on Between the clamping member and the connecting plate. Such a design can increase the contact friction force between the friction component and the second mounting bracket, and ensure a good fit between the friction component and the second mounting bracket.

In a possible implementation, the clamping member includes a fixed cam, a movable cam, a disc spring group, a stopper and a locking member that are sequentially sleeved on the rotating shaft; the fixed cam is in contact with the friction member , And the fixed cam is provided with a connecting arm inserted on the connecting plate.

In a second aspect, an embodiment of the present application provides a foldable terminal, including a first structural member, a second structural member, and the hinge described in any one of the above embodiments for connecting the first structural member and the second structural member Device.

In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, the hinge device and the folding terminal provided by the embodiments of the present application can solve The other technical problems of, the other technical features contained in the technical solutions, and the beneficial effects brought by these technical features will be described in further detail in the specific implementation.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of a notebook computer provided by an embodiment of the application;

2 is a schematic structural diagram of a hinge device provided by an embodiment of the application;

Figure 3 is an exploded view of the hinge device in Figure 2;

Fig. 4 is a schematic diagram of the structure of the rotating shaft in Fig. 3;

FIG. 5 is a schematic diagram of the structure of the first mounting bracket in FIG. 3;

Fig. 6 is a schematic structural diagram of the second mounting bracket in Fig. 3;

Figure 7 is a schematic diagram of the structure of the fixed cam in Figure 3

Fig. 8 is a schematic structural diagram of another angle of the fixed cam in Fig. 3;

Figure 9 is a schematic diagram of the structure of the friction component in Figure 3

Figure 10 is a cross-sectional view of the hinge device at the position of the friction component;

Figure 11 is a schematic view of the structure of the moving cam in Figure 3;

FIG. 12 is a torque curve diagram of the hinge device 3 provided by this embodiment.

Description of reference signs:

1: Main unit; 2: Display; 3: Hinge device;

31: first mounting bracket; 32: rotating shaft; 33: second mounting bracket;

34: friction component; 35-fixed cam; 36: moving cam;

37: Disc spring group; 38: Stopper piece; 39: Lock nut;

311: the first mounting hole; 312: the second mounting hole;

321: connecting end; 3211-third mounting hole; 3212: positioning boss;

322: shaft body; 3221: circular section; 3222: sliding section;

331: rotating plate; 3311: rotating part; 33111: second rotating hole;

3312: connecting part; 33121: inner mounting surface; 33122: outer mounting surface;

3313: connecting hole;

332: mounting plate; 3321: first mounting plate; 33211: fourth mounting hole;

3322: second mounting plate; 3323: middle plate;

341: friction part; 342: rolling cavity; 3421: first cavity;

3422: Revolving side wall; 3423: Second cavity; 3424: Stop-rotating side wall;

343: rolling element; 344-first rotating hole;

351: the first cam body; 3511: the third rotating hole; 3512: the first side surface;

3513: second side; 3514-drive bump

352: connecting arm;

361: cam sliding hole; 362: third side; 363: matching protrusion.

Detailed ways

In order to make the above objectives, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the related art, the hinge device is usually a cladding shaft, and the torque difference of the cladding shaft during forward and reverse rotation depends on the diameter change of the inner wall of the sheet metal coil, but due to the limitation of the hinge installation space, The number of turns of the sheet metal roll is small, and the diameter of the inner wall of the sheet metal roll is small, resulting in a small torque difference between the forward and reverse rotation of the hinge device, and the "open light and close heavy" feel is closer , The operating experience is poor.

In view of the foregoing problems, the embodiments of the present application provide an improved hinge device. In this hinge device, when the second mounting bracket rotates forward relative to the rotating shaft, the friction member follows the second mounting bracket to rotate forward, and there is no relative movement between the two. The torque that drives the second mounting bracket to rotate forward relative to the rotating shaft depends on Rolling friction between the second mounting bracket and the friction member and the rotating shaft. When the second mounting bracket is reversed with respect to the rotating shaft, since the friction member cannot follow the movement of the second mounting bracket in the reverse direction with respect to the rotating shaft, relative movement occurs between the second mounting bracket and the friction member. In order to smoothly make the second mounting bracket relative to the rotating shaft Reversal, it is necessary to overcome the friction between the second mounting bracket and the friction member to make the second mounting bracket reverse with respect to the shaft. The torque is large, that is, the friction between the second mounting bracket and the friction member is used to determine the user's drive The feel of the second mounting bracket when it rotates in the reverse direction; the folding terminal adopting the hinge device can have different torques during the forward and reverse rotation, thereby improving the user experience of "open light and close heavy".

In the folding terminal provided by the embodiment of the present application, the folding terminal includes a hinge device and a first structural member and a second structural member connected by the hinge device. The first structural part and the second structural part can realize relative rotation through the hinge device, so as to realize the opening and closing between the two. The folding terminals provided by the embodiments of the present application include, but are not limited to, notebook computers, flip phones, foldable phones, and foldable tablet computers. For the convenience of description, in the embodiments of the present application, a notebook computer is taken as an example of the above electronic device. The first structural member may be one of the host part and the display part, and the second structural member is the main part and the display part. another.

Figure 1 is a schematic structural diagram of a notebook computer provided by an embodiment of the application. As shown in Figure 1, the notebook computer includes a host portion 1, a display portion 2 and a hinge device 3, and the hinge device 3 is used to connect the host portion 1 and the display portion 2. , Used to realize the relative rotation between the host part 1 and the display part 2, and realize the opening and closing of the notebook computer.

The overall shape of the host portion 1 and the display portion 2 is the same or substantially the same rectangular plate shape. The display portion 2 includes a housing, and a display screen for displaying corresponding content is installed on the side of the housing facing the host portion 1. The display screen may be a touch display screen with a touch function, and the touch input function is realized by setting the touch display screen, thereby facilitating the user's input operation and the independent use of the display unit 2.

The host part 1 includes a host housing, and a keyboard and a pointing device are provided on the side of the host housing facing the display screen. The pointing device can be a touchpad and/or a pointing stick. A processor, a memory, a hard disk, a power supply, etc. are arranged inside the host casing.

The structure of the notebook computer is not limited to the above composition. For example, in some products, a battery, a processor, and other devices are also built in the casing of the display unit 2 to cooperate with the display unit 2 for display. In some products, the host unit 1 can also be equipped with a small-sized display screen to display some basic parameter information, such as battery power, device temperature, etc.; or, set a touch-sensitive display screen to replace part of it through display and touch Keyboard and/or positioning device input operations, for example, shortcut display and control operations, volume and brightness display and sliding adjustments, etc.

The display part 2 and the host part 1 are the first to-be-connected part and the second to-be-connected part of the hinge device 3, respectively. The display part 2 is opened and closed by rotating the hinge device 3 in the forward and reverse directions relative to the host part 1. The included angle between the display portion 2 and the host portion 1 relative to the hinge device 3 is the opening and closing angle. When the display portion 2 is opened relative to the host portion 1, the notebook computer has at least a closed state with an opening and closing angle of 0 degrees, and, The opening and closing angle is about 130 degrees in the open state. With the diversified development of notebook computers, notebook computers also have a flat state with an opening and closing angle of 180 degrees, a stand state with an opening and closing angle of between 180 and 270 degrees, and a flat state with an opening and closing angle of 360 degrees.

It should be noted that the forward rotation and the reverse rotation in this article are a pair of relative concepts, only to show that the rotation directions of the two rotations are opposite, and do not specifically refer to a specific rotation direction.

FIG. 2 is a schematic structural diagram of a hinge device provided by an embodiment of the application, and FIG. 3 is an exploded view of the hinge device in FIG. 2. As shown in FIGS. 2 and 3, the hinge device 3 includes a first mounting bracket 31, a rotating shaft 32, a second mounting bracket 33, a friction component 34, a fixed cam 35, a movable cam 36, a stop piece 38 and a lock nut 39. The rotation axis of the hinge device 3 is defined as the first axis.

FIG. 4 is a schematic diagram of the structure of the rotating shaft in FIG. 3. In conjunction with FIGS. 2 to 4, the rotating shaft 32 includes a rotating shaft body 322, a connecting end 321 and a locking end. The rotating shaft body 322 includes a circumferential section 3221 and a sliding section 3222. The circumferential section 3221 is a cylindrical structure with the first axis as the central axis. The sliding section 3222 includes a first sliding surface and a second sliding surface arranged parallel to the first axis. The distance between the first sliding surface and the second sliding surface is smaller than the diameter of the circumferential section 3221, and both ends of the first sliding surface and the second sliding surface pass The circular arcs with the same diameter as the circumferential section 3221 are connected. In a possible implementation manner, the sliding section 3222 may include only one sliding surface parallel to the first axis, and both ends of the sliding surface are connected by arcs with the same diameter as the circumferential section 3221.

The connecting end 321 and the locking end are located at two ends of the shaft body 322 respectively. In FIG. 4, the connecting end 321 is located at the left end of the shaft body 322, and the locking end is located at the right end of the shaft body 322.

FIG. 5 is a schematic structural diagram of the first mounting bracket in FIG. 3, and the first mounting bracket 31 is a display side mounting bracket for connecting the display portion 2.

As shown in FIG. 5, the first mounting bracket 31 has a plate-like structure, and is provided with a first mounting hole 311 threadedly connected to the display portion 2 and a second mounting hole 312 threadedly connected to the connecting end 321 of the rotating shaft 32. . Please refer to FIG. 4, the connecting end 321 includes a mating surface for mating with the first mounting bracket 31, and a third mounting hole 3211 is opened on the mating surface.

When the first mounting bracket 31 and the rotating shaft 32 are installed, the first mounting bracket 31 abuts on the mating surface, and then the connection is realized by threaded fasteners penetrating through the second mounting hole 312 and the third mounting hole 3211. It is understandable that those skilled in the art can adapt the shape of the first mounting bracket 31 and the second mounting hole 312 and the third mounting hole 3211 according to the structural features of the display portion 2 or other first to-be-connected parts. Number and set shape.

An end of the connecting end 321 close to the shaft body 322 is provided with a positioning boss 3212, and the positioning boss 3212 is an annular protrusion disposed around the shaft body 322. The positioning boss 3212 is higher than the mating surface. When the first mounting bracket 31 and the rotating shaft 32 are installed, the end of the first mounting bracket 31 abuts against the positioning protrusion, so that the accuracy and stability of the connection and mating position of the first mounting bracket 31 and the rotating shaft 32 can be ensured.

In this embodiment, as shown in FIG. 4, the locking end is the right end of the sliding section 3222, and the locking nut 39 is fixedly arranged on the locking end in a self-tapping manner, and the second mounting bracket 33, the friction component 34, and the fixed The cam 35, the movable cam 36 and the stop piece 38 are locked on the rotating shaft 32. It is understandable that the locking end may be provided with a locking thread around the first axis, and the locking nut 39 is fixedly sleeved on the rotating shaft 32 through the locking thread to achieve locking. Obviously, other types of fasteners can also be used to lock the second mounting bracket 33, the friction component 34, the fixed cam 35, the movable cam 36 and the stop piece 38 on the rotating shaft 32. For example, a protruding structure, a baffle, etc. fixedly arranged at the locking end.

It should be noted that, herein, the side close to the connecting end 321 is referred to as the inner side, and the side close to the locking end is referred to as the outer side.

FIG. 6 is a schematic diagram of the structure of the second mounting bracket 33. The second mounting bracket 33 is a system-side mounting bracket connected to the host unit 1, and includes a rotating plate 331 and a mounting plate 332. The rotating plate 331 is a plate-like structure extending perpendicular to the first axis, and includes a rotating portion 3311 matched with the rotating shaft 32 and a connecting portion 3312 extending from the rotating portion 3311 in a direction away from the rotating shaft 32. The rotating portion 3311 has a second rotating hole 33111 matching the circumferential section 3221 of the rotating shaft 32, and the second mounting bracket 33 is rotatably mounted on the rotating shaft 32 through the second rotating hole 33111 around the first axis. The rotating portion 3311 and the connecting portion 3312 may be an integrally formed structure, or may be a separate structure, and the two are connected and fixed by a connection method known to those skilled in the art such as threaded connection, welding, and the like.

The connecting portion 3312 has an inner mounting surface 33121 and an outer mounting surface 33122 perpendicular to the first axis. The inner mounting surface 33121 is located inside the connecting portion 3312 relative to the outer mounting surface 33122. The mounting plate 332 is fixedly arranged on the inner mounting surface 33121 by welding. The mounting plate 332 is used to connect with the main unit 1 and is a bent plate adapted to the main unit 1.

Exemplarily, the mounting board 332 includes a first mounting board 3321 and a second mounting board 3322 that are parallel to each other. The first mounting board 3321 and the second mounting board 3322 are staggered by a certain distance and connected by an intermediate board 3323. The second mounting plate 3322 cooperates with the rotating plate 331. The first mounting plate 3321 is provided with three fourth mounting holes 33211 for mounting the main unit 1, and the three fourth mounting holes 33211 are distributed in a triangular shape. The main unit 1 is connected to the first mounting plate 3321 through a threaded connection piece penetrated through the fourth mounting hole 33211.

Here, the number and arrangement of the threaded connections can be changed according to the host unit 1, which will not be listed here. It can be understood that those skilled in the art can set the shape of the mounting plate 332 according to the structural features of the host part 1 or other second to-be-connected parts. The mounting plate 332 may be an integral structure formed by sheet metal stamping.

In some feasible embodiments, the mounting plate 332 and the rotating plate 331 are connected by threaded fasteners. Specifically, one end of the mounting plate 332 close to the rotating plate 331 is bent to form a mating plate that fits with the inner mounting surface 33121 of the connecting portion 3312. , The mating plate is attached to the inner mounting surface 33121, and is connected by threaded fasteners penetrating between the mating plate and the connecting portion 3312.

In some feasible embodiments, the mounting plate 332 and the rotating plate 331 may be an integral structure.

A friction component 34 and a fixed cam 35 are sequentially arranged on the outer side of the rotating plate 331. 7 and 8 are structural schematic diagrams of the fixed cam 35. As can be seen from the figures, the fixed cam 35 includes a first cam body 351 and a connecting arm 352. The first cam body 351 is a disc structure surrounding the first axis. The disc structure is provided with a third rotating hole 3511 that matches the circumferential section 3221 of the rotating shaft 32 corresponding to the first axis. The fixed cam 35 can pass through the third rotating hole 3511. The rotating sleeve is set on the rotating shaft 32.

The outer peripheral edge of the first cam body 351 is connected with a connecting arm 352 extending along the first axis. The connecting arm 352 extends from the first cam body 351 toward the rotating plate 331 and extends into the connecting hole 3313 of the rotating plate 331. The fixed cam 35 and the second mounting bracket 33 realize synchronous rotation about the first axis through the cooperation of the connecting arm 352 and the connecting hole 3313.

In some feasible embodiments, the hinge device 3 can add a connecting structure between the connecting arm 352 and the rotating plate 331, and the connecting structure is used to fix the relative position of the connecting arm 352 and the rotating plate 331 along the first axis direction. In order to increase the reliability of the connection between the fixed cam 35 and the second mounting bracket 33. For example, the connecting arm 352 and the rotating plate 331 are fixedly connected by common connection methods such as welding and screw connection. For another example, a limiting protrusion is provided on both sides of the connecting arm 352 corresponding to the rotating plate 331, and the rotating plate 331 is clamped and restricted between the limiting protrusions of the connecting arm 352, thereby limiting the movement of the connecting arm 352 along the first axis. It moves relative to the rotating plate 331 in the direction.

In some feasible implementations, the hinge device in this embodiment can also be provided with multiple connecting arms 352 at different positions of the fixed cam 35 around the first axis to increase the synchronous rotation between the fixed cam 35 and the second mounting bracket 33 Reliability.

The friction component 34 is sandwiched between the fixed cam 35 and the rotating plate 331, and the fixed cam 35 is a clamping member that acts on the friction component 34. 9 is a schematic structural diagram of the friction assembly 34, and FIG. 10 is a cross-sectional view of the hinge device at the position of the friction assembly; it can be seen from the figure that the friction assembly 34 includes a friction member 341 and a rolling member 343, and the friction member 341 is made of friction material The disc structure can generate friction that hinders the relative movement of the rotating plate 331 and/or the fixed cam 35 when it moves relative to the rotating plate 331 and/or the fixed cam 35. The friction member 341 takes the first axis as the central axis, and defines a first rotation hole 344 sleeved on the circumferential section 3221 of the rotation shaft 32 corresponding to the first axis position. The friction member 341 is rotatably mounted on the rotating shaft 32 through the first rotating hole 344.

The friction member 341 is evenly provided with four rolling cavities 342 around the first axis, and the rolling members 343 are provided in the rolling cavities 342. In this embodiment, the rolling element 343 is a cylindrical roller, and its axis is the second axis. The rolling cavity 342 includes a first cavity 3421 and a second cavity 3423 that are communicated with each other.

As shown in FIG. 10, the second cavity 3423 is located in front of the first cavity 3421 in the clockwise direction. The first cavity 3421 is a cylindrical cavity adapted to the outer circumference of the cylindrical roller. The central axis of the cylindrical cavity is parallel to the first axis. The cylindrical roller is placed in the first cavity 3421, and the second axis of the cylindrical roller is parallel. It is on the first axis and can roll around the second axis. The first cavity 3421 includes a side wall surrounding the central axis of the cylindrical cavity, and the side wall is a revolving side wall 3422.

In a possible implementation, the revolving side wall 3422 can be formed by connecting and combining at least two first planar side walls parallel to the second axis, and the revolving side wall 3422 forms a rotation area not smaller than the outer circumferential surface of the rolling element 343, namely can. Specifically, the angle between adjacent first plane side walls is at least 90 degrees.

The second cavity 3423 is a cavity structure that prevents the rolling element 343 from rotating about the second axis, and includes a rotation-stop side wall 3424. The anti-rotation side wall 3424 is a substantially V-shaped side wall that opens toward the revolving side wall 3422. Specifically, the anti-rotation side wall 3424 includes two second planar side walls that intersect and the intersection angle between the two is an acute angle. For example, taking a plane perpendicular to the first axis of the rotating shaft as a cross section, the shape of the anti-rotation side wall 3424 It is V-shaped. One end of the two second planar side walls close to the first cavity 3421 forms an opening connected to the first cavity 3421. The distance between the two second plane sidewalls in the direction away from the first cavity 3421 is reduced until they are connected, so as to clamp the outer circumference of the rolling member 343 and restrict the rolling member 343 to follow the rotation axis to rotate.

It should be noted that the ends of the two second planar sidewalls away from the first cavity 3421 are not limited to be connected, and the distance between the two second plane sidewalls in the direction away from the first cavity 3421 is reduced.

In some possible implementations, the anti-rotation sidewall 3424 includes at least two second planar sidewalls parallel to the second axis connected together, and the included angle between adjacent second planar sidewalls is less than 90 degrees to form The rotation of the rolling member 343 around the second axis forms an interference stop region.

In a possible implementation, a friction structure that hinders the rotation of the rolling element 343 may be provided on the rotation-stop side wall 3424. The friction structure may be a convex point or a groove to increase the resistance of the rotation-stop side wall 3424. The surface roughness can be increased by setting the friction structure to increase the friction with the rolling element 343, and by increasing the friction, the rotation of the cylindrical roller is hindered and the stopping effect is improved.

The side of the rolling cavity 342 close to the rotation shaft 32 penetrates the first rotation hole 344, and this penetration position is called a connection port. Part of the structure of the rolling element extends from the connection port. The extended structure is called the driving part. The rotating shaft 32 is in frictional contact with the driving part. The driving part drives the rolling element 343 to rotate around the second axis under the driving of the rotating shaft 32, and It moves between the first cavity 3421 and the second cavity 3423.

In FIG. 10, the rotating shaft 32 is designed to rotate counterclockwise as the opening direction of the display portion 2 in the notebook computer, and the rotating shaft 32 is designed to rotate clockwise as the closing direction of the display portion 2 in the notebook computer as an example.

The working principle of the friction component 34 in the hinge device 3 is:

During the opening process, the rolling element 343 rotates clockwise around the second axis under the action of the rotating shaft 32, and moves until the first cavity 3421 contacts the revolving side wall 3422. Since the first cavity 3421 is a cavity structure that allows the rolling member 343 to rotate, the rolling member 343 can roll freely in the first cavity 3421, and the friction between the rolling member 343 and the rotating shaft 32 is relatively small. The friction member 341 can be driven by the rotating plate 331 and/or the fixed cam 35 to rotate synchronously with the rotating plate 331 and/or the fixed cam 35. At this time, the friction member 341 and the rotating plate 331 and/or the fixed cam 35 have no relative movement, so that The overall torque of the hinge device 3 is relatively small, and the opening is relatively easy and labor-saving.

During the closing process, the rolling element 343 rotates counterclockwise around the second axis under the action of the rotating shaft 32, and moves into the second cavity 3423 to contact the rotation preventing side wall 3424. Since the second cavity 3423 is a cavity structure that hinders the rolling of the rolling element 343, the rolling element 343 cannot rotate freely, and the friction between the rolling element 343 and the rotating shaft 32 increases until it becomes stuck. The rotating plate 331 and/or the fixed cam 35 cannot drive the friction member 341 to rotate synchronously. At this time, the friction member 341 and the rotating plate 331 and/or the fixed cam 35 produce relative movement, so that the overall torque of the hinge device 3 is relatively large, and the notebook computer is closed. It feels heavier.

In the related art, the torque difference of the wrapped shaft depends on the diameter change range of the inner wall of the sheet metal coil, and the diameter change of the inner wall of the sheet metal coil is usually small due to the structure limitation, resulting in a small torque difference in different rotation directions . And from the above description of the structure and working principle of the coated shaft, the torque is continuously and gradually changed during the rotation of the shaft in the coated shaft, that is, the torque gradually increases from the minimum value to the maximum value, and continuously decreases from the maximum value. It is as small as the minimum value; and when the torque changes from a larger value to a smaller value, it is necessary to overcome the larger value torque of the current state to proceed.

From the description of the structure and working principle of the hinge device in this embodiment, it can be known that the hinge device in this embodiment has different torques when rotating in different directions. The maximum and minimum torque are related to whether the friction member follows the second The rotation of the mounting bracket is related, and whether the friction member rotates with the second mounting bracket depends on the direction of rotation of the second mounting bracket relative to the rotating shaft. Therefore, by changing the direction of rotation, you can switch from a larger torque to a smaller torque, or from a smaller torque to a larger torque. The torque changes are discontinuous and jump, and the mutual changes are more rapid and direct. The user experience is better. Therefore, the difference can be enlarged by selecting different friction members 341, so that the design requirement of "light opening and closing heavy" can be better realized, and one-hand opening and closing can be easily realized.

Moreover, compared with the covered rotating shaft in the related art, the rolling cavity and the rolling element in this embodiment have a simple structure, and have lower requirements on the machining accuracy of the parts, thereby improving the assembly yield and reducing the cost.

In some feasible embodiments, the rolling element 343 may adopt spherical balls. It can be understood that the width of the rolling cavity 342 relative to the first axis should be compatible with the spherical ball, and it has a side wall that restricts the spherical ball from separating from the rolling cavity 342 along the first axis.

In some feasible embodiments, the friction component 34 further includes a first elastic element disposed between the rolling cavity 342 and the rolling element 343, and the rolling element 343 is driven by the elastic force of the first elastic element to press against the second cavity. 3423. With such a design, the rolling member 343 can be pressed against the rotation stop side wall 3424 in the initial state or when the friction member needs to be restricted from rotating in the reverse direction. When the friction member rotates in the forward direction, the elastic force can be overcome so that the rolling member 343 can enter the first cavity. Roll freely in the body. The use of the first elastic member can assist the rolling member 343 to rotate or stop rotating, so as to achieve the purpose of stopping rotation in time.

In the above-mentioned embodiment, the one-way rotation of the friction member 341 is realized by the rolling cavity 342 and the rolling member 343, so as to realize that the hinge device has different torques during forward rotation and reverse rotation.

The hinge device 3 in this embodiment can also adopt other one-way rotation mechanisms. For example, the friction component 34 includes a friction member 341 and a one-way rotation mechanism. The one-way rotation mechanism is disposed between the rotating shaft 32 and the friction member 341, and the friction member The 341 can only rotate in one direction around the first axis, and it is stuck in the other direction. The one-way rotation mechanism can be realized by a mechanism well known to those skilled in the art. For example, a ratchet mechanism can be used as the one-way rotation mechanism. Specifically, the ratchet mechanism includes a ratchet provided in the first mounting hole 311, a pawl provided on the rotating shaft 32, and a second elastic member acting on the pawl, and the pawl is in contact with the ratchet tooth under the driving of the second elastic member.

In a possible implementation manner, the friction member 341 is sleeved on the rotating shaft 32, and the one-way rotating mechanism is a one-way bearing provided between the friction member and the rotating shaft. A one-way bearing is also called an overrunning clutch, which is a kind of bearing that can rotate freely in one direction and lock in the other direction. The metal shell of a one-way bearing contains a lot of rollers, needles or balls, and the shape of the rolling seat (cavity) makes it only roll in one direction, and it will produce a lot of resistance in the other direction. The one-way bearing is installed on the outer circumference of the rotating shaft, and the friction piece is sleeved on the outer circumference of the one-way bearing, or the friction piece is sleeved on the outside of the rotating shaft and is connected with the one-way bearing on opposite sides. The friction element can also achieve the above-mentioned having different torques in different rotation directions by cooperating with the one-way bearing.

Referring to FIGS. 7 and 8, the inner end surface of the first cam body 351 of the fixed cam 35 facing the friction component 34 is a first side surface 3512, and the outer end surface of the friction member 341 is in contact with the first side surface 3512. The outer end surface of the first cam body 351 is the second side surface 3513.

11 is a structural diagram of the movable cam 36. The movable cam 36 is a disc structure surrounding the first axis. The side facing the fixed cam 35 is a third side surface 362. The middle of the movable cam 36 is provided with a cam sliding hole 361 at a position corresponding to the rotating shaft 32. The cam sliding hole 361 is a flat through hole that cooperates with the sliding section 3222 of the rotating shaft 32. The fixed cam 35 is installed on the sliding section 3222 of the rotating shaft 32 through the cam sliding hole 361. Through the cooperation of the cam sliding hole 361 and the sliding section 3222, the movable cam 36 can only slide along the first axis relative to the rotating shaft 32, but cannot rotate around the first axis.

In some other embodiments, the movable cam 36 and the rotating shaft 32 can also be connected by a key, spline, or the like to realize a design that can only slide and cannot rotate.

A driving structure for driving the fixed cam 35 to slide by relative rotation is provided between the second side surface 3513 and the third side surface 362. In this embodiment, the driving structure includes a driving protrusion 3514 provided on the second side surface 3513 and a mating protrusion 363 provided on the third side surface 362. The driving protrusion 3514 and the mating protrusion 363 cooperate with each other to form an edge during the rotation process. The structure with different sizes of the first axis drives the movable cam 36 to slide along the first axis. In some possible implementations, the driving structure may only be provided on one side of the fixed cam 35 or the movable cam 36, and the other side is a planar structure.

The driving structure is used to convert the rotation of the fixed cam 35 into the linear movement of the movable cam 36. Obviously, it is not limited to the above-mentioned one embodiment, and can also be other rotation-to-linear conversion mechanisms well known to those skilled in the art. For example, a threaded transmission mode can be selected. Specifically, the movable cam 36 is provided with a first transmission around the first axis. The fixed cam 35 is provided with a second transmission thread that matches the first transmission thread. The second transmission thread also uses the first axis as the thread structure. One of the first transmission thread and the second transmission thread is an internal thread, and the other It is an external thread set on the internal thread. The helical characteristic of the thread structure is used to complete the conversion from rotation to linear motion, and the movable cam 36 is driven to move.

A disc spring group 37 is provided outside the movable cam 36. The disc spring group 37 includes a plurality of disc springs arranged in sequence along the first axis.

Belleville springs, also known as Belleville spring washers, are in the shape of a conical disc, which can be used individually, or multiple in series or in parallel. When the load is squashed, the elastic potential energy is stored. When the load is removed or reduced, the elastic potential energy of the disc spring is released.

In this application, the action direction of the disc spring group 37 is parallel to the first axis, one end is in contact with the movable cam 36, and one end is in contact with the stopper. A stop piece 38 is provided on the outer side of the disc spring group 37, and the side of the stop piece 38 facing the disc spring group 37 is a friction plane. The stop piece 38 is provided with a stop piece mounting hole corresponding to the rotating shaft position, the stop piece mounting hole is a flat through hole, and the corresponding position of the rotating shaft is provided with a flat matching part, so as to realize the stop piece and the rotating shaft. Synchronous rotation.

A lock nut 39' is provided on the outside of the stop piece 38. The lock nut 39 is installed on the lock end through cooperation with the lock thread, and restricts the installation of the stop piece 38, the disc spring group 37, the movable cam 36, the fixed cam 35, the friction component 34 and the rotating plate 331 on the rotating shaft 32.

Because the stopper plate 38 rotates synchronously with the rotating shaft 32, the disc spring assembly 37 can rotate around the rotating shaft 32. Therefore, during the rotation of the rotating shaft, the disc spring assembly and the actuating plate move mutually to generate torque. When the disc spring group 37 exerts a greater force on the stopper plate 38, the torque generated is greater. When the force of the disc spring group 37 on the stopper plate 38 is smaller, the torque generated is smaller. Part of the torque of the hinge device 3 is realized by the action of the fixed cam 35, the movable cam 36, the disc spring and the stop piece 38.

The working principle of the stopper 38, the disc spring group 37, the movable cam 36, and the fixed cam 35 are as follows:

The counterclockwise rotation of the rotating shaft 32 is designed to be the opening direction of the display portion 2 in the notebook computer. During the opening process, since the movable cam 36 can only slide along the rotating shaft 32, the movable cam 36 rotates counterclockwise relative to the fixed cam 35. The driving structure makes the movable cam 36 slide inward under the drive of the disc spring group 37, so that the elastic potential energy of the disc spring group 37 is released, the force on the stopper plate 38 is reduced, and the friction torque is reduced.

The rotating shaft 32 rotates counterclockwise to be the closing direction of the display portion 2 in the notebook computer. During the closing process, since the movable cam 36 can only slide along the rotating shaft 32, the movable cam 36 rotates clockwise relative to the fixed cam 35. The driving protrusion makes the movable cam 36 slide outward under the drive of the disc spring set 37, so that the elastic potential energy of the disc spring set 37 is released, the force on the stopper plate 38 is reduced, and the friction torque is reduced.

It can be seen from the above description that the hinge device 3 in this embodiment works together with the friction component 34, the stopper 38, the disc spring group 37, the movable cam 36, and the fixed cam 35, which can achieve "light opening and closing heavy". , To ensure reliable self-locking. The corresponding relationship between the change area of the drive structure and the rotation angle can be changed to achieve different torques at different rotation angles. However, the covered shaft 32 in the related art does not have a self-locking structure, so a magnet must be used to eliminate the rebound to ensure that there is no abnormal opening after the notebook is closed. However, this design will result in a complex structure, occupy space, and affect the design of the whole machine. Therefore, compared with the coated rotating shaft, the hinge device in this embodiment has a simpler structure, a smaller space occupation, and a simple structure.

Figure 12 is a torque curve diagram of the hinge device 3 provided in this embodiment. It can be seen that the hinge device 3 provided in this embodiment requires a smaller opening torque than a closing torque, so that "open light and close heavy" can be achieved. "The design purpose is to enhance the user’s operating experience.

The hinge device 3 provided in this embodiment has a larger torque difference in different directions than the covered rotating shaft 32 in the prior art, and has lower requirements on machining accuracy, easier manufacturing and processing, and better assembly yield, thereby lower the cost.

In the related art, the traditional hinge based on the basic principle of "disc spring + cam + friction plate", its working principle is similar to the working principle of the fixed cam 35, the movable cam 36, the disc spring group 37 and the stopper 38 in this embodiment. Relying on the fixed cam and the moving cam to drive the disc spring set to exert different forces on the friction plate, so that it can produce different torques. This kind of hinge is similar to the covered shaft, the torque change is also continuous, the torque difference depends on the elastic coefficient of the disc spring and the motion range of the driving mechanism, so it cannot achieve a large torque difference.

In the description of this specification, the description with reference to the terms “one embodiment”, “some embodiments”, “exemplary embodiments”, “examples”, “specific examples”, or “some examples” etc. means to combine the embodiments The specific features, structures, materials, or characteristics described by the examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. range.

Claims

A hinge device, characterized by comprising a rotating shaft, a first mounting bracket, a second mounting bracket, and a friction component; the first mounting bracket is fixedly connected to the rotating shaft, and the second mounting bracket is rotatable with the rotating shaft The friction component includes a friction member and a one-way rotation mechanism; the friction member is in frictional contact with the second mounting bracket, and can follow the second mounting bracket to rotate in the positive direction around the axis of the shaft; the The one-way rotation mechanism is installed on the rotating shaft and fixedly connected with the friction member, and is used for restricting the friction member to follow the second mounting bracket to rotate in the reverse direction.
The hinge device according to claim 1, wherein the one-way rotation mechanism comprises a rolling cavity provided in the friction member, and a rolling member provided in the rolling cavity; the rolling member and the The outer circumferential surface of the rotating shaft is in frictional contact; the rolling cavity includes a first cavity that allows the rolling element to follow the rotation of the rotating shaft, and a second cavity that prevents the rolling element to follow the rotation of the rotating shaft.
The hinge device according to claim 2, wherein the first cavity includes a revolving side wall, and the revolving side wall forms a rotation area not smaller than the outer circumference of the rolling element; the second cavity It includes a non-rotation side wall connected with the revolving side wall, and the revolving side wall forms a non-rotation area smaller than the outer circumferential surface of the rolling element.
The hinge device according to claim 3, wherein the revolving side wall is an arc-shaped side wall that is adapted to the outer circumferential surface of the rolling element.
The hinge device according to claim 3, wherein the revolving side wall comprises at least two first plane side walls parallel to the rotation axis of the rolling element connected; adjacent to the first plane side wall The angle between them is at least 90 degrees.
The hinge device according to claim 3, wherein the anti-rotation side wall includes at least two second plane side walls that are parallel to the rotation axis of the rolling element and are connected; adjacent to the second plane side The angle between the walls is less than 90 degrees.
The hinge device according to claim 6, wherein the anti-rotation side wall comprises two of the second planar side walls, and the opening formed by the two second planar side walls faces toward the side of the revolving side wall V-shaped structure.
7. The hinge device according to claim 7, wherein the surface of the anti-rotation side wall in contact with the rolling element is provided with a plurality of convex points.
The hinge device according to any one of claims 2-8, wherein the friction component further comprises a first elastic member arranged in the rolling cavity, and the first elastic member connects the rolling member Press into the second cavity.
The hinge device according to claim 2, wherein the rolling element is a cylinder, and the axis of the cylinder is parallel to the axis of the rotating shaft.
The hinge device according to claim 2, wherein the rolling element is a round ball.
The hinge device according to any one of claims 2-9, 10, and 11, wherein the friction member is provided with a first rotating hole rotatably matched with the rotating shaft; the rolling cavity is close to the One side of the rotating shaft is provided with a connecting port that penetrates the first rotating hole; the rolling element protrudes from the connecting port and is in frictional contact with the rotating shaft.
The hinge device according to claim 2, wherein a plurality of the rolling cavities are evenly arranged around the outer circumferential surface of the rotating shaft.
The hinge device according to claim 1, wherein the friction member is provided with a first rotating hole that is rotatably matched with the rotating shaft; and the one-way rotating mechanism is arranged between the first rotating hole and the rotating shaft. The ratchet mechanism between the rotation shafts, the ratchet mechanism includes a ratchet tooth provided on the inner surface of the first rotation hole, a pawl provided on the shaft, and a second elastic member acting on the pawl, The pawl is in contact with the ratchet tooth under the driving of the second elastic member.
The hinge device according to claim 1, wherein the friction member is sleeved on the rotating shaft, and the one-way rotation mechanism is a one-way bearing provided between the friction member and the rotating shaft.
The hinge device according to claim 1, wherein the second mounting bracket includes a connecting plate rotatably mounted on the rotating shaft; the hinge device further includes a clamping member sleeved on the rotating shaft, the The friction component is sandwiched between the clamping piece and the connecting plate.
The hinge device according to claim 16, wherein the clamping member includes a fixed cam, a movable cam, a disc spring group, a stopper and a locking member that are sequentially sleeved on the rotating shaft; the fixed cam and The friction member is in contact, and a connecting arm inserted on the connecting plate is provided on the fixed cam.
A folding terminal, characterized by comprising a first structural member, a second structural member, and a hinge device connecting the first structural member and the second structural member, as claimed in any one of claims 1-17 .