CN114876947B - Rotating shaft and foldable device - Google Patents

Abstract

Embodiments of the present disclosure provide a rotating shaft and a foldable device. The rotating shaft can be arranged between a first body and a second body of the foldable device and connect the first body and the second body so that the first body and the second body can rotate relative to each other, wherein the rotating shaft comprises: a rotating shaft base, which comprises an assembly shaft; a spring, one end of which is arranged on the rotating shaft base; a stop block, which is arranged on the other end of the spring, the stop block comprises a first extrusion portion; and a rotating arm, which is arranged on the stop block and can perform a first rotation and a second rotation in different directions around the assembly shaft, the rotating arm comprises a second extrusion portion, wherein the spring, the stop block and the rotating arm are sleeved on the assembly shaft, and during the first rotation, the first extrusion portion and the second extrusion portion can abut against each other and move the stop block toward the rotating shaft base and squeeze the spring.

Description

Hinges and foldable devices

Technical Field

The present disclosure relates to the technical field of foldable devices, and in particular, to a hinge and a foldable device, and in particular to smart glasses, such as AR glasses.

Background technique

Smart glasses products, such as AR/VR/XR smart glasses, are increasingly shifting from industrial to commercial and civilian fields, and the appearance design of glasses is also becoming more trendy. However, different groups of users have different head sizes, which makes it difficult for existing smart glasses products to meet the wearing experience of all users.

Summary of the invention

According to one aspect of the present disclosure, there is provided:

A rotating shaft, wherein the rotating shaft can be arranged between a first body and a second body of a foldable device and connect the first body and the second body so that the first body and the second body can rotate relative to each other, wherein the rotating shaft comprises:

A rotating shaft base, which includes an assembly shaft;

A spring, one end of which is arranged on the rotating shaft base;

a limit block, which is arranged at the other end of the spring, and the limit block includes a first extrusion portion; and

a rotating arm, which is arranged on the limit block and can perform a first rotation and a second rotation in different directions around the assembly axis, the rotating arm comprising a second extrusion portion,

in,

The spring, the limit block and the rotating arm are sleeved on the assembly shaft. During the first rotation, the first pressing portion and the second pressing portion can abut against each other and cause the limit block to move toward the rotating shaft base and press the spring.

Optionally, according to an embodiment of the present disclosure, the limit block further includes a first stop portion, and the rotating arm further includes a second stop portion, and during the second rotation, the first stop portion and the second stop portion can abut against each other and prevent further rotation of the rotating arm.

Optionally, according to one embodiment of the present disclosure, the length of the abutment portion between the first extrusion portion and the second extrusion portion in the moving direction of the limit block is greater than the distance between the limit block and the shaft base when the first extrusion portion and the second extrusion portion have not yet abutted against each other.

Optionally, according to an embodiment of the present disclosure, the rotating shaft is configured as a symmetrical structure and includes two assembly shafts, two springs, two limit blocks and two rotating arms, which are respectively arranged on both sides of the symmetry plane of the rotating shaft base configured to be symmetrical.

Optionally, according to an embodiment of the present disclosure, the rotating shaft further includes a fastener, and the fastener is disposed on the rotating arm and sleeved on the assembly shaft.

Optionally, according to an embodiment of the present disclosure, the first stop portion and the second stop portion both include a vertical surface, and/or the first extrusion portion and the second extrusion portion both include an inclined surface.

Optionally, according to an embodiment of the present disclosure, the limit block includes a first protruding portion, and the first stop portion and the first extruding portion are both arranged on the first protruding portion; and/or

The rotating arm comprises a second protruding portion, and the second stopping portion and the second pressing portion are both arranged on the second protruding portion.

Optionally, according to an embodiment of the present disclosure, the rotating shaft base includes a first assembly hole for being assembled to the first body, and the rotating arm includes a second assembly hole for being assembled to the second body.

Optionally, according to an embodiment of the present disclosure, the limit block includes a disc for supporting the first stop portion and the first extrusion portion and abutting the other end of the spring, and the rotating shaft base includes a cylinder with an accommodating space inside, and the assembly shaft and the spring extend outward from the inside of the cylinder.

Optionally, according to an embodiment of the present disclosure, the shaft base, the spring, the limit block and the rotating arm are all made of metal.

Optionally, according to an embodiment of the present disclosure, when the first pressing portion and the second pressing portion have not yet abutted against each other, the spring is already in a compressed state.

Optionally, according to an embodiment of the present disclosure, the fastener includes a retaining spring or a nut.

According to another aspect of the present disclosure, there is provided:

A foldable device includes a first body and a second body, and further includes any of the above-mentioned rotating shafts, wherein the rotating shaft is arranged between the first body and the second body and connects the first body and the second body so that the first body and the second body can rotate relative to each other.

Optionally, according to an embodiment of the present disclosure, the foldable device is glasses.

The first body includes one of the temple of the glasses and the frame, and the second body includes the other of the temple of the glasses and the frame; or

The first body and the second body include two parts of the temple.

Optionally, according to an embodiment of the present disclosure, the foldable device is an electronic device, comprising a display module, wherein a first display panel of the display module is located on the first body, and a second display panel of the display module is located on the second body.

Optionally, according to an embodiment of the present disclosure, the foldable device is an electronic device, comprising a flexible display screen, wherein a first non-bending portion of the flexible display screen is located on the first body, a second non-bending portion of the flexible display screen is located on the second body, and the bending portion of the flexible display screen corresponds to the rotating shaft, and during the relative rotation of the first body and the second body, the bending portion is deformed.

Optionally, according to an embodiment of the present disclosure, the glasses include smart glasses.

Optionally, according to an embodiment of the present disclosure, the electronic device includes a foldable mobile phone, a foldable tablet computer or a foldable laptop computer.

The hinge and foldable device provided by the embodiments of the present disclosure at least partially realize one or more of the following technical advances:

It can adapt to more user head shapes and meet the wearing needs of different groups of users, improve wearing comfort and firm wearing, and enhance user experience; during the flipping process of the hinge, it can flip inwards smoothly, and there is elastic force to hinder the flipping outwards; the hinge has its own internal and external flipping angle limiters; it can prevent the screen of the electronic device from cracking, breaking, significant creases due to excessive bending, and the risk of damage to screen-related components.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features of the present disclosure will become apparent with reference to the accompanying drawings, in which:

FIG1 is a schematic diagram showing the overall structure of a rotating shaft according to an embodiment of the present disclosure;

FIG2 shows an exploded schematic diagram of a rotating shaft according to an embodiment of the present disclosure;

FIG3 is a schematic diagram showing a state of a rotating shaft when the rotating arm is flipped inwards by 90° according to an embodiment of the present disclosure;

FIG4 is a schematic diagram showing a state of a rotating shaft when the rotating arm is flipped outwards by 15° according to an embodiment of the present disclosure;

FIG5 shows a simplified schematic diagram of an AR glasses according to an embodiment of the present disclosure; and

FIG6 shows a schematic diagram of the connection between a rotating shaft and a mirror frame and a mirror leg according to an embodiment of the present disclosure.

Detailed ways

It is easy to understand that according to the technical solution of the present disclosure, without changing the essential spirit of the present disclosure, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present disclosure, and should not be regarded as the entirety of the present disclosure or as a limitation or restriction to the technical solution of the present disclosure.

The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third", etc. or similar expressions are only used for description and distinction purposes, and cannot be understood as indicating or implying the relative importance of the corresponding components.

With the development of computer technology, near-eye display technology or wearable devices, various foldable or wearable devices and products (such as smart wearable electronic products based on the new 3D human-computer interaction concept) including smart electronic products have emerged and gradually entered the consumer market. Smart glasses (Smart Glass) are a type of wearable smart product, including but not limited to AR (Augmented Reality), MR (Mixed Reality), VR (Virtual Reality), CR (Cinematic Reality) and other XR (Extended Reality) product forms, from the virtual world input through limited sensors to the fully immersive virtual world, which has attracted more and more attention. Among them, extended reality includes augmented reality (AR), virtual reality (VR), mixed reality (MR) and other forms. In other words, XR is actually a general term, divided into multiple levels, including AR, VR, and MR.

Similar to smart glasses, foldable devices, such as foldable phones, have also experienced explosive growth in the past two years, with various foldable phone forms appearing, such as double-sided, left-right, top-down, inward-folding, and outward-folding. Regardless of the inward-folding or outward-folding design, the phone screen will be at risk of being broken, cracked, or having significant creases due to excessive bending. The components inside the screen and the CPI film or UTG glass on the screen are also at risk of being damaged by bending.

1 and 2 , there are shown a schematic diagram of the overall structure of a rotating shaft according to an embodiment of the present disclosure, and a schematic diagram of an exploded view of a rotating shaft according to an embodiment of the present disclosure.

According to an embodiment of the present disclosure, a rotating shaft 1 can be disposed between a first body 21 and a second body 22 of a foldable device 2 and connect the first body 21 and the second body 22 so that the first body 21 and the second body 22 can rotate relative to each other, wherein the rotating shaft 1 includes:

The rotating shaft base 11 includes an assembly shaft 111;

A spring 12, one end of which is arranged on the rotating shaft base 11;

a limit block 13 disposed at the other end of the spring 12, wherein the limit block 13 comprises a first extrusion portion 131; and

The rotating arm 14 is disposed on the stop block 13 and can perform a first rotation and a second rotation in different directions around the assembly axis 111. The rotating arm 14 includes a second extrusion portion 141.

in,

The spring 12 , the limit block 13 and the rotating arm 14 are mounted on the assembly shaft 111 . During the first rotation, the first pressing portion 131 and the second pressing portion 141 can abut against each other and move the limit block 13 toward the rotating shaft base 11 and press the spring 12 .

It should be understood that the foldable device mentioned in this article is a broad concept, which includes not only the case where the main body of the entire device is foldable (such as a foldable mobile phone), but also the case where the parts of the device are foldable (such as glasses including the temples of smart glasses). The rotating shaft 1 provided in the embodiment of the present disclosure can be applied to various foldable devices. For example, such devices may include at least one set of a first body and a second body that need to achieve relative rotation (folding). The rotating shaft 1 connects the first body and the second body so that the first body and the second body can rotate relative to each other. In addition, the naming of the first body 21 and the second body 22 is only used for distinction, and does not necessarily mean that the two bodies must belong to two different components. According to actual conditions, they can also be two parts of the same component. "The rotating arm 14 is arranged on the limit block 13" means that the rotating arm 14 can be arranged above or on the limit block 13. The first rotation and the second rotation (or the rotation along the first direction and the rotation along the second direction) can be counterclockwise rotation and clockwise rotation respectively (from a top-down perspective in Figure 1).

When the first extrusion part 131 and the second extrusion part 141 abut against each other and move the limit block 13 toward the shaft base 11 and squeeze the spring 12, it should be known that the spring 12 will generate a reaction force on the limit block 13, and this reaction force will generate resistance to the rotation of the rotating arm along the first direction, and in the absence of the force source of the first rotation (for example, when the smart glasses have been worn to a suitable position on the user's head), this reaction force can cause the rotating arm 14 to rotate along the second direction via the first extrusion part 131 and the second extrusion part 141, thereby generating and maintaining a clamping force on the user's head, so that the foldable device, such as glasses, always abuts against the user's head and will not fall off the head. Therefore, through the above technical solution, the foldable device can be adapted to a wide range of user groups, and can be worn securely, thereby improving the user's wearing experience. For the same glasses, users of various head shapes can obtain the clamping force.

When the foldable device is an electronic device, such as a foldable mobile phone, a tablet computer, or a laptop computer, the hinge 1 can also be used to prevent the screen of the electronic device from rotating excessively, for example, preventing the display screen from rotating in the opposite folding direction, or generating resistance in the above manner when such reverse rotation occurs, and being able to promptly rotate the screen back to the critical position (i.e., the position where the first and second squeezing parts just touch but there is no squeezing force, such as a flat state, i.e., the left part of the hinge base 11 with the assembly hole and the right part of the rotating arm 14 with the assembly hole are in the same plane) when the force source disappears, thereby avoiding the risk of the electronic device screen being cracked, broken, or having significant creases due to excessive bending, and the risk of damage to screen-related components (such as components in the screen, films on the screen, and glass) being avoided.

It should also be understood that the positions of the first extrusion portion 131 and the second extrusion portion 141 determine when the rebound force or clamping force begins to take effect (i.e., to what extent the first rotation of the rotating arm is performed), that is, determine the critical position that has not yet taken effect. Therefore, their positions can be designed according to actual conditions. For example, as shown in FIG. 1, the critical position is a state where the rotating arm and the rotating shaft base (or the left part thereof) are spread out 180 degrees, which can be better applied to the application scenarios of glasses or electronic devices. Of course, the critical position can also be changed to other angle states. In addition, the first rotation "period" does not require that the entire first rotation process will trigger the abutment of the two extrusion portions, but a part of the first rotation (usually the end of the first rotation), that is, the first rotation can first have an "idle period" (depending on the initial state of the rotating shaft), and then after the rotating arm rotates in the first direction for a certain time or a certain stroke, the abutment of the extrusion portions is triggered at the end. The second rotation period described below can also be interpreted similarly.

It can also be seen from the figure that the limit block 13 also includes a first stopper 132, and the rotating arm 14 also includes a second stopper 142. During the second rotation, the first stopper 132 and the second stopper 142 can abut against each other and prevent the rotating arm 14 from further rotating. In other words, the two stoppers set the limit position for the second rotation of the rotating arm. For example, when the rotating shaft is applied to glasses, it can prevent the temples from turning too much and hitting the frames. When the rotating shaft is applied to electronic devices, it can also prevent the screens from turning too much and hitting each other.

Similarly, the positions of the first stopper 132 and the second stopper 142 determine the design of the above-mentioned extreme positions, and their positions can be designed or adjusted according to actual conditions. For example, as shown in FIG3 , the rotation arm flips inward 90 degrees as the extreme position. Therefore, the rotation between the stopper and the extrusion portion can be regarded as an idling period. It should also be understood that the number of each stopper and the extrusion portion can also be modified according to actual needs. Thus, the present rotating shaft 1 provides an angle limitation in the inversion, or positive direction (for example, for smart glasses, the direction in which the temple folds inward, that is, the direction from the end of the temple away from the frame to the direction close to the frame; for example, for a foldable mobile phone, the entire machine folds inward, that is, the display side of the inner screen faces the face).

Regarding the shapes of the stopper and the extrusion part, in some embodiments of the present disclosure, the first stopper 132 and the second stopper 142 both include vertical surfaces, and the first extrusion part 131 and the second extrusion part 141 both include inclined surfaces. These design schemes can well realize the required stopper or extrusion function, and are simple to manufacture and low in cost. The requirements for different extreme positions and critical positions can be met by using limit blocks (or rotating arms) with different positions, numbers or shapes of stoppers or extrusion parts. In addition, it should be known that the inclination direction of the inclined surface is facing the direction of the rotating arm as shown in FIG. 1, so that the aforementioned technical effects can be achieved.

In some embodiments of the present disclosure, the length (height in the figure) of the contact portion between the first extrusion portion 131 and the second extrusion portion 141 in the moving direction of the limit block 13 is greater than the distance between the limit block 13 and the shaft base 11 when the first extrusion portion 131 and the second extrusion portion 141 have not yet contacted each other. That is to say, in the process of the extrusion portions contacting and causing the limit block to move toward the shaft base, due to the above-mentioned dimensional relationship design, the limit block 13 will eventually touch the shaft base 11 (for example, its upper surface) during the movement, thereby preventing the rotating arm 14 from continuing to rotate along the first direction, thereby achieving a limiting effect on the first rotation of the rotating arm 14. This extreme position design can effectively prevent the shaft and the foldable device used from being improperly over-bent after exceeding the critical position to a certain extent because the force source has not disappeared, so as to avoid serious damage or deformation. Therefore, the hinge 1 provides an angle limitation in the eversion, or reverse direction (for example, for smart glasses, the direction in which the temples fold outward, that is, the direction in which the end of the temples away from the frame moves away from the frame; for example, for a foldable mobile phone, the entire device folds outward, that is, the display side of the inner screen is back to back).

Such an extreme position can be seen, for example, from FIG4 , which shows a schematic diagram of a state of a rotating shaft according to an embodiment of the present disclosure when the rotating arm is turned outward by 15°, that is, the extreme position corresponds to 15 degrees of outward turn. It should be known that the angle of such an extreme position can be adjusted by designing the distance between the limit block and the rotating shaft base, or the position design of the first and second extrusion parts, such as changing it to 0 degrees.

It can also be seen from the figure that the rotating shaft 1 is constructed into a symmetrical structure and includes two assembly shafts 111, two springs 12, two limit blocks 13 and two rotating arms 14, which are respectively arranged on both sides of the symmetry plane of the rotating shaft base 11 constructed symmetrically. The figure exemplifies a structure that is symmetrical up and down. The advantage of the symmetrical structure is that it can achieve force balance, and can apply force to the connected first body and second body in a more comprehensive, balanced and stable manner, thereby increasing their service life, and the rebound speed can be higher, and the clamping force can also be higher, more durable and more balanced. In addition, the symmetrical structures can also be regarded as complementary or redundant to each other, so the force applied by a single component is lower or the time of applying force is shorter, which prolongs the service life of related components (such as springs, first and second extrusion parts), and when one of the components fails, the function of the entire rotating shaft can still be maintained by another component.

In order to assemble and fix the components of the rotating shaft 1, the rotating shaft 1 also includes a fastener 15, which is arranged on the rotating arm 14 and is sleeved on the assembly shaft 111. The fastener 15 exemplarily includes a retaining ring or a nut, so that sufficient fixing and assembly effects can be achieved with a relatively simple structure and cost, and can be replaced in time. The fastener 15 makes the entire rotating shaft 1 compact in structure and will not fall out during use (especially the rotating arm that needs to be stressed). In the case where the fastener 15 is configured as a nut, exemplarily, the assembly shaft 111 can be designed with an external thread to match the nut. Threaded fastening connection is a widely used detachable fixed connection with the advantages of simple structure, reliable connection, and convenient assembly and disassembly. Although the above-mentioned fixing method is described by way of example, this is not restrictive, and other common fixing methods, such as snap-on, magnetic attraction, etc., can also be applied.

As can be clearly seen from FIG. 2 , the stop block 13 includes a first protruding portion 133, the first stop portion 132 and the first extruding portion 131 are both arranged on the first protruding portion 133, and the rotating arm 14 includes a second protruding portion 144, the second stop portion 142 and the second extruding portion 141 are both arranged on the second protruding portion 144. Therefore, the dual functions of stopping and extruding are simultaneously achieved by the arrangement of each protruding portion, which saves manufacturing and design costs and space occupation, and improves the use efficiency. Each protruding portion can be provided with two, respectively, and they are distributed opposite to each other at 180 degrees, so as to achieve a balanced, shared and stable stopping and extruding effect. Specifically, a stop portion is arranged on one side of each protruding portion, and an extruding portion is arranged on the other side.

As for the specific structure of each part of the rotating shaft 1, it can be clearly seen from FIG. 2 that the stop block 13 includes a disc 134 for carrying the first stopper 132 and the first extrusion part 131 and abutting the other end of the spring 12, and the rotating shaft base 11 includes a cylinder 113 with a receiving space inside, and the assembly shaft 111 and the spring 12 extend outward from the inside of the cylinder 113. As a result, the structure of the entire rotating shaft 1 is relatively compact, and the assembly space of the rotating shaft base 11 is fully utilized and its function as an assembly basis is maintained. It can also be seen that the rotating shaft base 11 includes a first assembly hole 112 for assembly to the first main body 21, and the rotating arm 14 includes a second assembly hole 143 for assembly to the second main body 22. The rotating shaft base 11 is exemplarily divided into a left part, a right part and a transition part, wherein the transition part connects the left part and the right part, the right part is a structural combination of the cylinder 113 and the assembly shaft 111, and the left part is a cube with a rounded rectangular cross section and an assembly hole. The rotating arm 14 can be divided into a left part and a right part, wherein the left part includes the second protrusion 144 and is also carried by a disc. An opening is provided in the middle of the stop block and the disc of the rotating arm to be assembled with the assembly shaft 111. The right part of the rotating arm 14 includes a connecting rod portion as a transition section and a cube with a rounded rectangular cross section, which is provided with an assembly hole. The position, shape, number and other characteristics of each assembly hole can be adjusted according to the structure or type of the foldable device to be applied. Through the assembly hole, different bodies of the device can be fixedly connected to the rotating shaft. For example, it is fixed to the temples and frames of smart glasses, and the housings of different display screens of foldable mobile phones. The entire rotating shaft 1 has a simple structure, low manufacturing and assembly costs, and can achieve the above-mentioned technical effects. The disassembly and maintenance of the rotating shaft and the main body and the parts of the rotating shaft itself are also relatively easy.

It should be noted that the "rectangle" here does not require a strict rectangle in the mathematical sense, but only needs to be roughly rectangular in shape. Therefore, corresponding deformations in local design are allowed, such as chamfers, roundings, recesses, protrusions, etc., which all fall within the scope of protection of the present disclosure. Although the above-mentioned implementation method of the assembly hole is described by way of example, this is not restrictive, and other structural implementations, such as bonding, snap-fitting, welding connection, etc., may also be applicable. Similarly, the size, shape, quantity, and arrangement position of the corresponding connection means can be adjusted according to the corresponding parts of the foldable device to be installed.

In some embodiments of the present disclosure, the shaft base 11, the spring 12, the stopper 13 and the rotating arm 14 are all made of metal, so that the shaft 1 has high strength and improves the service life of the shaft 1. It should be understood that the fastener 15 can also be made of metal.

In the assembled state of the rotating shaft 1, when the first extrusion part 131 and the second extrusion part 141 have not yet abutted against each other, the spring 12 is already in a compressed state. That is to say, the spring 12 always has a reaction force on the limit block 13, so that it can be ensured that the rotating arm 14 will not be in an outward position exceeding the critical position (i.e., the position after rotating from the critical position in the first direction), and can only be in the critical position or the inward position relative to the critical position (i.e., the position after rotating from the critical position in the second direction), thereby ensuring that the rotating shaft 1 and the foldable device 2 can be in a folded or critical state when not in use, saving space, being easy to store and increasing the service life of related parts.

5 and 6 , there is shown a simplified schematic diagram of an entire AR glasses according to an embodiment of the present disclosure, and a schematic diagram of the connection between a rotating shaft and a frame and temples according to an embodiment of the present disclosure.

The foldable device 2 includes a first body 21 and a second body 22, and also includes any of the above-mentioned shafts 1, wherein the shaft 1 is disposed between the first body 21 and the second body 22 and connects the first body 21 and the second body 22, so that the first body 21 and the second body 22 can rotate relative to each other. Thus, the foldable device 2 is endowed with the aforementioned technical effects through the shaft 1, which will not be described in detail here. The connection between the shaft and each body can be achieved by fixing the aforementioned first and second assembly holes with screws.

As mentioned above, the two bodies can be independent components or two different parts of the same component. For example, the foldable device 2 is a pair of glasses, the first body 21 includes one of the temples and the frame of the glasses, and the second body 22 includes the other of the temples and the frame of the glasses; or the first body 21 and the second body 22 include two parts of the temples, that is, the shaft can be used for the relative rotation of the temples themselves. It should be understood that a plurality of shafts 1 can be provided in a foldable device 2 (such as glasses or electronic devices), for example, two shafts 1 are provided in a pair of glasses, one for each temple, to enhance the aforementioned technical effects and make the rebound force or clamping force more balanced. In addition, the glasses include smart glasses, which can be AR, VR and other smart glasses. Although binocular smart glasses are shown in the figure, it should be understood that monocular smart glasses can also be applied to the shaft 1 provided in the embodiment of the present disclosure. Therefore, when the rotating shaft provided in the present invention is applied to the temples of AR glasses, an elastic force can be generated after exceeding a certain angle when the temples of the AR glasses drive the rotating arms to flip outward. The elastic force of the reverse rotation causes the temples to generate a clamping force on both sides of the user's head when the user wears the glasses, thereby being able to adapt to more user head shapes and improving user experience.

In some embodiments of the present disclosure, the foldable device 2 is an electronic device, which includes a foldable mobile phone, a foldable tablet computer or a foldable laptop computer. In this case, the shaft 1 can act as an independent shaft or an auxiliary shaft (to prevent excessive bending). Specifically, the electronic device includes a display module, the first display panel of the display module is located in the first body 21, and the second display panel of the display module is located in the second body 22. Under this structure, the shaft 1 is fixed to the rear shell (i.e., the shell away from the display panel) of the first body 21 and the second body 22 respectively. For example, the electronic device can be a foldable dual-screen mobile phone, including two separate, non-continuous display panels to form a display module, and the connecting part between the two display panels adopts the shaft provided by any of the above embodiments, extending in the longitudinal direction of the display panel, and the left side of the shaft base and the right side of the rotating arm (i.e., the parts containing the assembly holes respectively) extend in the transverse direction of the display panel.

In some embodiments of the present disclosure, the electronic device includes a flexible display screen, the first non-bending portion of the flexible display screen is located at the first body 21, the second non-bending portion of the flexible display screen is located at the second body 22, the bending portion of the flexible display screen corresponds to the rotating shaft 1, and the bending portion is deformed during the relative rotation of the first body 21 and the second body 22. Under this structure, the rotating shaft is fixed to the rear shell of the first body and the second body (i.e., the shell away from the display panel) respectively, and is covered by the display panel of the bending portion. The display module included in this type of electronic device is a complete and continuous display panel, and the display panel includes non-bending portions on both sides as the main display areas and a bending portion located between the non-bending portions, and the bending portion covers the rotating shaft. The first body and the second body can be arranged symmetrically or asymmetrically relative to the bending portion, or can be arranged symmetrically or asymmetrically relative to the bending portion.

The rotating shaft 1 can also be installed on the foldable mobile phone in the manner described above, specifically assembled on the shell of the foldable mobile phone, and can achieve corresponding characteristics and technical effects.

In some embodiments of the present disclosure, the rotating shaft 1 is parallel to the short side of the foldable mobile phone and is arranged in the central area relative to its long side when the mobile phone is unfolded, thereby giving the foldable mobile phone a function of folding up and down. In some other embodiments, the rotating shaft 1 is parallel to the long side of the foldable mobile phone and is arranged in the central area relative to its short side when the mobile phone is unfolded, thereby giving the foldable mobile phone a function of folding left and right. Although the split-screen folding method is described above by way of example, this is not restrictive, and other folding methods, such as the arrangement position and angle change of the rotating shaft relative to the mobile phone screen, are also applicable.

Finally, the working principle of the hinge and its application effect when applied to foldable devices (taking AR glasses as an example) are briefly described in detail.

During operation, the rotating shaft base 11 does not move. When the rotating arm 14 is simultaneously turned inwardly 90 degrees around the assembly axis 111 of the rotating shaft base 11, there is no squeezing between the rotating arm 14 and the limit block 13, and the rotating process is smooth. When it is turned to 90 degrees (as shown in FIG. 3 ), the second stop portion 142 of the stopper of the rotating arm 14 collides with the first stop portion 132 of the limit block 13, and the limit block 13 blocks the rotating arm 14, thereby achieving the inward turning limit effect.

When the rotating arm 14 is flipped outward around the assembly axis 111 of the rotating shaft base 11 at the same time, the second extrusion portion 141 of the rotating arm 14 and the first extrusion portion 131 of the limit block 13 are pressed against each other, so that the limit block 13 is pressed toward the neutral plane (i.e., toward the rotating shaft base 11; when the rotating shaft 1 is a symmetrical structure, the neutral plane can also be understood as the symmetry plane of the rotating shaft 1, such as the horizontal symmetry plane), resulting in increased pressure on the spring 12, generating elastic force to hinder the limit block 13 from moving toward the neutral plane, indirectly hindering the rotation of the rotating arm 14, and generating elastic force for reverse rotation.

When the rotating arm 14 is simultaneously turned outward by 15 degrees around the assembly axis 111 of the rotating shaft base 11 (as shown in FIG4 ), the limiting block 13 moves toward the neutral plane for a distance and then collides with the plane of the cylinder 113 of the rotating shaft base 11 and cannot move further, so that the rotating arm 14 cannot continue to turn over, thereby achieving an outward turning limiting effect.

The rotating shaft 1 is designed into the AR glasses' temples (as shown in Figure 5), and the AR glasses' temples can be smoothly turned inward 90 degrees for storage. When the user wears the AR glasses, the temples are stretched outward on both sides of the head. During the outward turning process, the temples are subjected to the elastic force of the reverse rotation of the rotating arm 14 in the rotating shaft 1, so that the left and right temples clamp the product on both sides of the user's head, making it secure to wear, greatly improving the experience.

It should be understood that all of the above preferred embodiments are illustrative rather than restrictive, and that various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present disclosure should be within the legal protection scope of the present disclosure.

Claims (15)

1. A rotating shaft, characterized in that it can be arranged between a first body and a second body of a foldable device and connect the first body and the second body so that the first body and the second body can rotate relative to each other, wherein the rotating shaft comprises: A rotating shaft base, which includes an assembly shaft; A spring, one end of which is arranged on the rotating shaft base; a limit block, which is arranged at the other end of the spring, and the limit block includes a first extrusion portion; and a rotating arm, which is arranged on the limit block and can perform a first rotation and a second rotation in different directions around the assembly axis, the rotating arm comprising a second extrusion portion, in, The rotating arm, the limit block and the spring are sequentially mounted on the assembly shaft. During the first rotation, the first extrusion portion and the second extrusion portion can abut against each other and cause the limit block to move toward the rotating shaft base and squeeze the spring. The length of the abutment portion between the first extrusion portion and the second extrusion portion in the moving direction of the limit block is greater than the distance between the limit block and the rotating shaft base when the first extrusion portion and the second extrusion portion have not yet abutted against each other. The first extrusion portion and the second extrusion portion both include an inclined surface, the limit block also includes a first stop portion, and the rotating arm also includes a second stop portion. The first stop portion and the second stop portion both include vertical surfaces. During the second rotation, the vertical surfaces of the first stop portion and the second stop portion can abut against each other and prevent further rotation of the rotating arm. 2. The rotating shaft according to claim 1 is characterized in that it is constructed into a symmetrical structure and comprises two assembly shafts, two springs, two limit blocks and two rotating arms, which are respectively arranged on both sides of the symmetry plane of the rotating shaft base that is constructed into a symmetrical structure. 3 . The rotating shaft according to claim 1 , further comprising a fastener, wherein the fastener is disposed on the rotating arm and sleeved on the assembly shaft. 4. The rotating shaft according to claim 1, characterized in that the limit block comprises a first protruding portion, and the first stop portion and the first extruding portion are both arranged on the first protruding portion; and/or The rotating arm comprises a second protruding portion, and the second stopping portion and the second pressing portion are both arranged on the second protruding portion. 5 . The rotating shaft according to claim 1 , wherein the rotating shaft base comprises a first assembly hole for being assembled to the first body, and the rotating arm comprises a second assembly hole for being assembled to the second body. 6. The rotating shaft according to claim 1 is characterized in that the limit block includes a disc for carrying the first stop portion and the first extrusion portion and abutting the other end of the spring, and the rotating shaft base includes a cylinder with an accommodating space inside, and the assembly shaft and the spring extend outward from the inside of the cylinder. 7 . The rotating shaft according to claim 1 , wherein the rotating shaft base, the spring, the limit block and the rotating arm are all made of metal. 8 . The rotating shaft according to claim 1 , wherein the spring is already in a compressed state when the first pressing portion and the second pressing portion have not yet abutted against each other. 9. The rotating shaft according to claim 3, characterized in that the fastener comprises a retaining spring or a nut. 10. A foldable device, comprising a first body and a second body, characterized in that it also comprises a rotating shaft according to any one of claims 1 to 9, wherein the rotating shaft is arranged between the first body and the second body and connects the first body and the second body so that the first body and the second body can rotate relative to each other. 11. The foldable device according to claim 10, wherein the foldable device is glasses. The first body includes one of the temple of the glasses and the frame, and the second body includes the other of the temple of the glasses and the frame; or The first body and the second body include two parts of the temple. 12. The foldable device according to claim 10 is characterized in that it is an electronic device, comprising a display module, a first display panel of the display module is located on the first body, and a second display panel of the display module is located on the second body. 13. The foldable device according to claim 10 is characterized in that it is an electronic device, comprising a flexible display screen, a first non-bending portion of the flexible display screen being located on the first body, a second non-bending portion of the flexible display screen being located on the second body, a bending portion of the flexible display screen corresponding to the rotating shaft, and during the relative rotation of the first body and the second body, the bending portion is deformed. 14. The foldable device according to claim 11, wherein the glasses are smart glasses. 15. The foldable device according to claim 12 or 13, characterized in that the electronic device is a foldable mobile phone, a foldable tablet computer or a foldable laptop computer.