A bidirectional rotary hinge

Abstract

The application discloses a bidirectional rotary hinge, and belongs to the technical field of intelligent wearable devices, wherein the bidirectional rotary hinge comprises a first connecting piece, a second connecting piece, a third connecting piece and an elastic piece; the first connecting piece is provided with a first clamping part; the second connecting piece is rotationally connected with the first connecting piece around a first axis; the second connecting piece is provided with a second clamping part; the third connecting piece is rotationally connected with the second connecting piece around a second axis; the elastic piece connects the second connecting piece and the third connecting piece; the first axis and the second axis have an included angle; the third connecting piece and the first connecting piece are respectively used for being connected with different structures, so that the first connecting piece rotates around the first axis and the second axis relative to the third connecting piece; the first clamping part is provided with a plurality of clamping parts which are arranged at intervals along the circumferential direction of the first axis, and / or the second clamping part is provided with a plurality of clamping parts which are arranged at intervals along the circumferential direction of the first axis. The application can improve the comfort and experience of a user when using intelligent glasses.

Description

Technical Field

[0001] This application relates to the technical field of smart wearable devices, and more particularly to a bidirectional rotary hinge. Background Technology

[0002] With the rapid development of virtual reality (VR), augmented reality (AR), and mixed reality (MR) technologies, smart glasses have become an important tool in fields such as human-computer interaction, entertainment, education, healthcare, and industry. However, existing smart glasses have temples that are fixedly connected to the frame or rotate in one direction, resulting in a relatively small field of view (FOV) that cannot be adjusted, leading to poor user comfort and experience. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a bidirectional rotary hinge that can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] A bidirectional rotary hinge, comprising:

[0006] The first connector has a first engaging portion;

[0007] The second connector is rotatably connected to the first connector about a first axis; the second connector is provided with a second engaging portion.

[0008] The third connector is rotatably connected to the second connector about the second axis;

[0009] An elastic element connects the second connecting element and the third connecting element;

[0010] The first axis and the second axis have an included angle, and the third connector and the first connector are respectively used to connect to different structures so that the first connector can rotate relative to the third connector around the first axis and the second axis.

[0011] The first engaging portion has multiple parts and is arranged circumferentially at intervals along the first axis, and / or the second engaging portion has multiple parts and is arranged circumferentially at intervals along the first axis.

[0012] Preferably, the bidirectional rotary hinge further includes a first pivot; the first connector has a sleeve hole, the second connector has a shaft hole, and the second connector is rotatably connected to the first connector through the first pivot passing through the sleeve hole and the shaft hole, thereby realizing relative rotation between the first connector and the second connector.

[0013] Preferably, the bidirectional rotary hinge further includes a second pivot; the third connector is rotatably connected to the second connector via the second pivot, the second connector has a first friction surface, the third connector has a second friction surface, the first friction surface abuts against the second friction surface, so that the relative rotation of the second connector and the third connector generates a damping force.

[0014] Preferably, the bidirectional rotary hinge further includes a retaining ring; the retaining ring is sleeved on the second pivot to prevent the second pivot from disengaging and causing the second connector to separate from the third connector.

[0015] Preferably, the third connector is provided with a receiving groove, the elastic element is disposed in the receiving groove, one side surface of the elastic element abuts against the second connector, and the other side of the elastic element abuts against the third connector, thereby ensuring the clamping capability of the bidirectional rotary hinge.

[0016] Preferably, the second connecting member of the bidirectional rotary hinge has a limiting part, and the third connecting member has an abutting part. The limiting part is located on the rotation path of the abutting part, so that both the first rotating member and the second rotating member maintain abutment with the elastic member.

[0017] Preferably, the bidirectional rotary hinge further includes a limiting member, which is disposed in the receiving groove and forms a slot together with the inner wall of the receiving groove. The elastic member is engaged in the slot to realize the installation of the elastic member.

[0018] Preferably, the elastic element is a thermoplastic polyurethane elastomer.

[0019] Preferably, the third connector includes a housing and a cover plate; the cover plate engages with the housing and together form the receiving groove, facilitating wiring.

[0020] Preferably, the limiting member is made of metal, the housing is used to snap onto one end of the temple, at least a portion of the limiting member is used to connect the temple, and at least a portion of the limiting member is installed on the housing by threaded fasteners to improve the installation strength of the limiting member.

[0021] The beneficial effects of this application are as follows: The bidirectional rotary hinge of this application enables the temples to rotate around a first axis and a second axis that are perpendicular to each other by rotating the first connector, the second connector and the third connector in sequence. After the bidirectional rotary hinge connects the frame and the temples, the temples can rotate around two different directions. This allows the smart glasses to not only adapt to users with different head circumferences and ear heights, but also to adjust the field of view (FOV), thus improving user comfort and experience. Attached Figure Description

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the bidirectional rotary hinge of this application;

[0024] Figure 2 An exploded view of the bidirectional rotary hinge of this application;

[0025] Figure 3 This is a partial sectional view of a two-way rotary hinge.

[0026] Figure 4 for Figure 3 The magnified view at point A;

[0027] Figure 5 This is a schematic diagram of the structure of smart glasses;

[0028] Figure 6 The front view of the smart glasses;

[0029] Figure 7 An exploded view of smart glasses;

[0030] Figure 8 This is an assembly diagram of the frame and the two-way rotating hinge;

[0031] Figure 9 for Figure 8 An enlarged view of point B.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Two-way rotating hinge; 2. Frame; 3. Wearing space; 4. Button assembly;

[0034] 11. First connecting member; 12. Second connecting member; 13. Third connecting member; 14. Temple; 15. Elastic member; 16. Second pivot; 17. Snap ring; 18. Limiting member; 19. Snap groove;

[0035] 111. Sleeve hole; 112. First engaging part;

[0036] 121. Second wiring channel; 122. Second engaging part; 123. Shaft hole; 124. First friction surface; 125. Limiting part;

[0037] 131. Housing; 132. Cover plate; 133. Abutment part; 134. Third wiring channel; 135. Second friction surface;

[0038] 21. Mounting slot; 22. Positioning shaft. Detailed Implementation

[0039] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "fixed," "linked," "communicated," "abutting," "clamping," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but it may also have additional steps not included in the figures. The process may correspond to a method, function, procedure, subroutine, subroutine, etc.

[0043] Unless otherwise stated or defined, the term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0044] In related technologies, with the increasing diversification of electronic products, head-mounted display devices such as smart glasses are gaining popularity as an important medium for human-computer interaction. Smart glasses, also known as XR glasses, include VR glasses, AR glasses, and MR glasses. They integrate simulation technology, computer graphics human-computer interface technology, multimedia technology, sensing technology, and network technology, creating a high-tech product that leverages computers and the latest sensor technology to provide a novel means of human-computer interaction. When users wear these smart glasses, in addition to seeing stereoscopic images, the images also change as the user's head moves, providing a more immersive experience.

[0045] Smart glasses mainly consist of a frame and temples. Some temples are fixedly connected to the frame, resulting in a relatively small and non-adjustable field of view (FOV). Other temples are rotatably connected to the frame, rotating horizontally relative to the frame to accommodate the user's head. This design also suffers from a limited FOV. The relatively small and non-adjustable FOV of smart glasses prevents optimal visualization and makes it difficult to ensure the user's eyes are always in the ideal optical viewing position of the lenses, significantly impacting user experience and display quality.

[0046] To address the problems in the aforementioned related technologies, this application provides a bidirectional rotary hinge. This bidirectional rotary hinge has a simple structure and can be applied to eyeglasses, particularly smart glasses, to achieve bidirectional rotation of the temples. When the temples are mounted on the frame of the smart glasses via the bidirectional rotary hinge, they can rotate relative to the frame in both vertical and horizontal directions. This allows for horizontal rotation to accommodate different head sizes and vertical rotation to adjust the field of view (FOV), thereby achieving optimal visualization and ensuring that the user's eyes are always in the ideal optical viewing position of the lenses, thus improving user experience and display quality.

[0047] For ease of description, unless otherwise stated, the horizontal or left-right directions mentioned below are not the same as those used in other contexts. Figure 6 The X direction is consistent with the vertical direction mentioned below. Figure 6 The Z-direction is consistent.

[0048] like Figures 1 to 5As shown, this embodiment provides a bidirectional rotary hinge 1, including a first connecting member 11, a second connecting member 12, a third connecting member 13, and an elastic member 15. The first connecting member 11, the second connecting member 12, and the third connecting member 13 form a double rotary mechanism. The first connecting member 11 has a first engaging portion 112, and the second connecting member 12 is rotatably connected to the first connecting member 11 about a first axis. The second connecting member 12 has a second engaging portion 122. The third connecting member 13 is rotatably connected to the second connecting member 12 about a second axis. The elastic member 15 connects the second connecting member 12 and the third connecting member 13. There is an angle between the first axis and the second axis, that is, the angle between the first axis and the second axis is greater than 0 degrees. In this embodiment and in the accompanying drawings, the first axis and the second axis are perpendicular to each other, that is, the angle between the first axis and the second axis is 90 degrees. In other embodiments, the angle between the first axis and the second axis can also be 89 degrees, 85 degrees, 70 degrees, etc.

[0049] The third connector 13 and the first connector 11 are respectively used to connect to different structures so that the first connector 11 can rotate relative to the third connector 13 around the first axis and the second axis. Taking smart glasses as an example, the different structures refer to the frame 2 and the temple 14. For example, the third connector 13 is connected to the frame 2 and the first connector 11 is connected to the temple 14, or the first connector 11 is connected to the frame 2 and the third connector 13 is connected to the temple 14.

[0050] In the embodiments of this application, unless otherwise stated, the example is that the first connector 11 is connected to the frame 2 and the third connector 13 is connected to the temple 14. The first connector 11 has a simple structure, saves space when installed in the frame 2, and facilitates the installation and wiring of other components of the smart glasses.

[0051] The first engaging portion 112 has multiple parts and is arranged circumferentially along the first axis, and / or the second engaging portion 122 has multiple parts and is arranged circumferentially along the first axis.

[0052] The bidirectional rotating hinge 1 enables the temple 14 to rotate around a first axis and a second axis that are perpendicular to each other by rotating the first connector 11, the second connector 12 and the third connector 13 in sequence. After the bidirectional rotating hinge 1 is installed on the frame 2, the temple 14 can rotate around two mutually perpendicular directions. This allows the smart glasses to not only fit users with different head circumferences and ear heights, but also to adjust the field of view (FOV), improving user comfort and experience.

[0053] Specifically, the positioning of the first connector 11 and the second connector 12 in the vertical direction is achieved by a snap-fit ​​mechanism. The first connector 11 is provided with a first snap-fit ​​portion 112, and the second connector 12 is provided with a second snap-fit ​​portion 122 for engaging with the first snap-fit ​​portion 112.

[0054] There are three ways in which the second connector 12 and the first connector 11 can cooperate. The first way is that the first connector 11 has multiple first engaging portions 112 and the second connector 12 has one second engaging portion 122, achieving positioning by engaging the second engaging portion 122 with one of the first engaging portions 112. The second way is that the first connector 11 has one first engaging portion 112 and the second connector 12 has multiple second engaging portions 122, achieving positioning by engaging the first engaging portion 112 with one of the second engaging portions 122. The third way is the same as the first way, where the first connector 11 has multiple first engaging portions 112 and the second connector 12 has multiple second engaging portions 122. By rotating the second connector 12, different second engaging portions 122 engage with different first engaging portions 112 to achieve positioning when the smart glasses are adjusted to different viewing angles. The embodiments of this application are described in a third manner, in which the cooperation of multiple first engaging portions 112 and multiple second engaging portions 122 can improve the stability of positioning.

[0055] This application uses a first connector 11, a second connector 12, and a third connector 13 to connect the temple 14 to the frame 2, thereby allowing the temple 14 to rotate relative to the frame 2 around a first axis and a second axis. The rotation of the temple 14 around the first axis and the rotation of the temple 14 around the second axis can be performed independently without affecting each other. The first axis and the second axis are perpendicular to each other. In this embodiment, the first axis is horizontally arranged from left to right, allowing the temple 14 to rotate relative to the frame 2 in the vertical direction. Figure 2 The Z-direction. The second axis is set vertically, so that the temple 14 can rotate relative to the frame 2 in the horizontal direction, that is... Figure 2 The X direction.

[0056] The elastic element 15 connects the second connecting element 12 and the third connecting element 13. The connection between the second connecting element 12, the third connecting element 13 and the elastic element 15 can be a fixed connection or an abutment. The bidirectional rotating hinge 1 is generally installed in pairs. The elastic element 15 applies a spring force to the temples 14, causing the two temples 14 to tend to move closer to each other along the first axis. The elastic element 15 has a certain spring force; when the temples 14 swing horizontally relative to the frame 2, the temples 14 will abut against the elastic element 15, thus improving the clamping capacity of the two temples 14 in the horizontal direction. The elastic element 15 is compressible, allowing the temples 14 a certain amount of swing space in the horizontal direction.

[0057] When the bidirectional rotating hinge 1 is assembled into smart glasses, there are two temples 14, two second connectors 12, and two third connectors 13, each corresponding to one other. The two temples 14 are spaced apart along the first axis, and two elastic members 15 are respectively located on opposite sides of the two temples 14. The two elastic members 15 apply elastic force to the temples 14, causing the two temples 14 to tend to move closer to each other along the first axis. When wearing the smart glasses, the two temples 14 can be driven to rotate around the second axis to adjust the distance between them. The elastic members 15 hold the temples 14 against the user's head, allowing the smart glasses to be worn comfortably. When field of view (FOV) adjustment is required, the temples 14 are driven to rotate around the first axis to achieve FOV adjustment, thereby obtaining the best visualization effect and ensuring that the user's eyes are always in the ideal observation position of the lens optics, improving the user experience and display effect. After the field of view (FOV) is adjusted, the positioning of the temple 14 and the frame 2 in the vertical direction can be achieved by either locking or by the damping force generated by the interference fit.

[0058] As is understood, in the accompanying drawings of this application, the first axis is set horizontally and the second axis is set vertically, so that the second connector 12 drives the temple 14 to rotate up and down, and the third connector 13 drives the temple 14 to rotate left and right.

[0059] Optionally, the first connector 11 is mounted on the frame 2, allowing the second connector 12 to rotate relative to the frame 2 around the first axis. The third connector 13 is rotatably mounted on the third connector 13 around the second axis. The temple 14 is connected to the third connector 13, and the temple 14 and the third connector 13 can be connected by snap-fit, threaded connection, or other methods. Thus, by sequentially hinged together by the first connector 11, the second connector 12, and the third connector 13, the third connector 13 drives the temple 14 to rotate relative to the frame 2 in both the vertical and horizontal directions.

[0060] Furthermore, one end of the second connector 12 is fan-shaped and has multiple second engaging portions 122, making the structure of the second connector 12 more compact. Both the second engaging portion 122 and the first engaging portion 112 include multiple spaced protrusions and grooves formed between two adjacent protrusions. Through the engagement of the protrusions and grooves, the positioning of the second connector 12 after vertical swing adjustment is achieved.

[0061] In one embodiment, the frame 2 is provided with a mounting groove 21, and a first connector 11 located within the mounting groove 21 is provided on the frame 2. A first engaging portion 112 is provided on the first connector 11. Since the second engaging portion 122 and the first engaging portion 112 can not only rotate relative to each other, but also engage with each other after rotation, the second engaging portion 122 and the first engaging portion 112 are prone to wear. The first engaging portion 112 is provided on the first connector 11 and then mounted on the frame 2, and the second engaging portion 122 is provided on the second connector 12, which can improve the replaceability of smart glasses. When the second engaging portion 122 and the first engaging portion 112 are worn, the first connector 11 and the second connector 12 can be replaced without replacing the frame 2 and the temples 14, avoiding waste and saving costs.

[0062] Optionally, the frame 2 is provided with a positioning shaft 22 located in the mounting groove 21. The positioning shaft 22 is integrally formed with the frame 2, improving structural strength. The first axis coincides with the axis of the positioning shaft 22. The second connector 12 is provided with a shaft hole 123. The first connector 11 is provided with a sleeve hole 111. The first connector 11 is sleeved on the positioning shaft 22 through the sleeve hole 111 and threadedly connected to the frame 2 through a threaded fastener C1. The second connector 12 is sleeved on the positioning shaft 22 through the shaft hole 123 and rotatably mounted on the positioning shaft 22 through a first pivot. The head of the first pivot restricts the second connector 12 from detaching from the positioning shaft 22. The first pivot is a threaded fastener C2. Both the threaded fastener C1 and the first pivot are screws, nuts, or other components. The threaded fastener C1 enables the detachable installation of the first connector 11, and the first pivot enables the rotatable installation of the second connector 12, achieving the installation and cooperation of the first connector 11 and the second connector 12.

[0063] Optionally, the bidirectional rotating hinge 1 further includes a second pivot 16. The third connector 13 is rotatably connected to the second connector 12 via the second pivot 16. The second connector 12 has a first friction surface 124, and the third connector 13 has a second friction surface 135. The first friction surface 124 and the second friction surface 135 abut against each other. Through the mutual abutment of the first friction surface 124 and the second friction surface 135, an interference fit is achieved between the second connector 12 and the third connector 13. When the second connector 12 and the third connector 13 rotate relative to each other, the friction between the first friction surface 124 and the second friction surface 135 provides a damping force for the left and right rotation of the temple 14.

[0064] It is understood that, in other embodiments, the damping force for the left and right rotation of the temple 14 can also be achieved through the interference fit between the second pivot 16 and the shaft hole 123.

[0065] In one embodiment, the bidirectional rotary hinge 1 further includes a retaining ring 17. The retaining ring 17 is sleeved on the second pivot 16. The second pivot 16 is a pin, and the retaining ring 17 is disposed at the end of the pin. The retaining ring 17 restricts the axial movement of the pin, thereby preventing the pin from disengaging from the second connector 12 and the third connector 13, which would cause the second connector 12 and the third connector 13 to separate.

[0066] Optionally, the elastic element 15 can be an elastic rubber, a spring, a thermoplastic polyurethane elastomer (TPU), a torsion spring, etc. For example, when the elastic element 15 is a torsion spring and is sleeved on the second pivot 16, the two torsion axes of the torsion spring are respectively connected to the second connector 12 and the third connector 13.

[0067] Furthermore, the third connector 13 has a receiving groove, and the elastic member 15 is disposed in the receiving groove. One side surface of the elastic member 15 abuts against the second connector 12, and the other side of the elastic member 15 abuts against the third connector 13. The installation of the elastic member 15 in the receiving groove can achieve dust and water protection and ensure the clamping ability of the temple 14 in the horizontal direction.

[0068] In one embodiment, the second connector 12 has a limiting portion 125, and the third connector 13 has an abutting portion 133, with the limiting portion 125 located on the rotation path of the abutting portion 133. Specifically, one end of the third connector 13 has an abutting portion 133 and is fitted onto the second connector 12. The limiting portion 125 is located on the rotation path of the abutting portion 133. When the third connector 13 rotates clockwise and counterclockwise relative to the second connector 12 to a certain angle, the abutting portion 133 will abut against the limiting portion 125, thereby limiting the rotation angle between the third connector 13 and the temple 14. Alternatively, the limiting portion 125 may only limit the rotation range of the temple 14 in one direction. For example, the limiting portion 125 may only limit the range of rotation of the two temples 14 in mutually distancing directions. By setting the limiting part 125 and the abutting part 133 to cooperate, the third connecting part 13 can rotate within a certain range, which can adapt to users with different head circumferences. This avoids the third connecting part 13 driving the temple 14 to rotate at an angle that greatly exceeds the size of the user's head circumference, thus avoiding adjustment difficulties. It also ensures that the second connecting part 12 and the third connecting part 13 are both in contact with the elastic part 15.

[0069] Optionally, the bidirectional rotary hinge 1 also includes a limiting member 18, which is disposed at the opening of the receiving groove. The limiting member 18 and the inner wall of the receiving groove together form a slot 19, and the elastic member 15 is engaged in the slot 19 to realize the installation of the elastic member 15.

[0070] Furthermore, the elastic element 15 is made of thermoplastic polyurethane elastomer (TPU). Compared to springs, torsion springs, and other elastic elements, TPU has the characteristics of high tensile strength, high tensile force, and high wear resistance, and can withstand greater loads and impacts. One end of the thermoplastic polyurethane elastomer abuts against the second connecting member 12, while the other end of the thermoplastic polyurethane elastomer is engaged in the slot 19 and applies elastic force to the third connecting member 13. When the temple 14 swings left and right under the action of the third connecting member 13, it will press against the thermoplastic polyurethane elastomer. The thermoplastic polyurethane elastomer has a certain elasticity, which improves the clamping ability of the temple 14 in the horizontal direction. At the same time, the thermoplastic polyurethane elastomer is compressible, allowing the temple 14 to have a certain swinging space in the horizontal direction.

[0071] Optionally, the third connector 13 includes a housing 131 and a cover plate 132. The cover plate 132 is snapped into the housing 131 and together they enclose a receiving groove. The cover plate 132 is snapped into the hook groove of the housing 131 by barbs, which facilitates wiring.

[0072] In one embodiment, the limiting member 18 is made of metal, one end of the temple 14 is snapped into the housing 131, at least a portion of the limiting member 18 is connected to the temple 14, and at least a portion of the limiting member 18 is installed in the housing 131 by threaded fasteners C3, thereby improving the installation strength of the limiting member 18. The threaded fasteners C3 are screws, nuts, or other fasteners. The limiting member 18 can be fixed to the temple 14 and located on the outer side of the temple 14, that is, the thermoplastic polyurethane elastomer is located on the outer side of the second connector 12 and the third connector 13, saving space in the third connector 13 and the temple 14, and facilitating wiring.

[0073] like Figures 6 to 9 As shown, this embodiment also provides a smart glasses, including a frame 2, temples 14, and a bidirectional rotating hinge 1 as described in any of the above embodiments. A first connector 11 of the bidirectional rotating hinge 1 is mounted on the frame 2, one end of the temple 14 is connected to a third connector 13, and the other end of the temple 14 bends and extends in a direction away from the third connector 13, so that the bidirectional rotating hinge 1 is not easy to fall off when worn around the ears.

[0074] The bidirectional rotating hinge 1 has two hinges and connects to one temple 14, forming a wearing space 3 between the two temples 14. Two elastic elements 15 are respectively disposed on opposite sides of the two temples 14, applying elastic force to the temples 14 so that the two temples 14 tend to move closer to each other along the first axis.

[0075] Furthermore, the cover plate 132, the limiting member 18, the elastic member 15, and the housing 131 are arranged sequentially in a direction away from the wearing space 3, with the cover plate 132 close to the wearing space 3 and the housing 131 away from the wearing space 3. The elastic member 15 is close to the inner side of the third connector 13, facilitating wiring within the receiving groove of the third connector 13. When the smart glasses are worn, the user's head is located within the wearing space 3.

[0076] Optionally, the frame 2 has a first wiring channel, the second connector 12 has a second wiring channel 121, and the third connector 13 has a third wiring channel 134, forming a third wiring channel 134 between the limiting member 18 and the cover plate 132. The temple 14 has a fourth wiring channel. The first wiring channel, the mounting groove 21, the second wiring channel 121, the third wiring channel 134, and the fourth wiring channel are connected to form a wiring space to accommodate the wiring structure of the head-mounted display device. The wiring is laid through the first wiring channel, the mounting groove 21, the second wiring channel 121, the third wiring channel 134, and the fourth wiring channel, avoiding cable exposure.

[0077] Compared to the connection method where the elastic element 15 is located in the middle of the second wiring channel 121 and the receiving groove, connecting the second connector 12 and the third connector 13, the elastic element 15 in this application uses thermoplastic polyurethane elastomer and is attached to the inner wall of the second wiring channel 121 and the receiving groove. This results in a larger space at the second pivot 16, making it easier to lay out the flexible circuit board (FPC) and other circuits of the smart glasses. When the temple 14 is folded, the flexible circuit board will not be damaged due to hard bending, increasing the bending life of the flexible circuit board.

[0078] In one embodiment, the smart glasses further include a button assembly 4, a flexible circuit board (FPC), and a camera and a control module, both disposed on the frame 2. The flexible circuit board passes through a first wiring channel, a mounting groove 21, a second wiring channel 121, a third wiring channel 134, and a fourth wiring channel. The button assembly 4 is disposed on the temple 14. The camera is electrically connected to the control module, and the control module is electrically connected to the button assembly 4 through the flexible circuit board.

[0079] This application reduces the area occupied by the vertically and horizontally swinging bidirectional rotating hinge 1, increases the space that can be accommodated inside the frame 2, and thus facilitates the integration of multi-functional modules such as cameras and control modules inside the frame 2.

[0080] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A bidirectional rotary hinge, characterized in that, include: The first connector (11) is provided with a first engaging part (112); The second connector (12) is rotatably connected to the first connector (11) about the first axis; the second connector (12) is provided with a second engaging part (122); The third connector (13) is rotatably connected to the second connector (12) about the second axis; An elastic element (15) connects the second connector (12) and the third connector (13); The first axis and the second axis have an included angle. The third connector (13) and the first connector (11) are respectively used to connect to different structures so that the first connector (11) can rotate relative to the third connector (13) around the first axis and the second axis. The first engaging portion (112) has a plurality of portions arranged circumferentially along the first axis, and / or the second engaging portion (122) has a plurality of portions arranged circumferentially along the first axis.

2. The bidirectional rotary hinge according to claim 1, characterized in that, It also includes a first pivot; the first connector (11) is provided with a sleeve hole (111), the second connector (12) is provided with a shaft hole (123), and the second connector (12) is rotatably connected to the first connector (11) through the first pivot passing through the sleeve hole (111) and the shaft hole (123).

3. The bidirectional rotary hinge according to claim 1, characterized in that, It also includes a second pivot (16); the third connector (13) is rotatably connected to the second connector (12) via the second pivot (16), the second connector (12) has a first friction surface (124), the third connector (13) has a second friction surface (135), and the first friction surface (124) abuts against the second friction surface (135).

4. The bidirectional rotary hinge according to claim 3, characterized in that, It also includes a retaining ring (17); the retaining ring (17) is sleeved on the second pivot (16).

5. The bidirectional rotary hinge according to claim 3, characterized in that, The third connector (13) is provided with a receiving groove, and the elastic member (15) is disposed in the receiving groove. One side surface of the elastic member (15) abuts against the second connector (12), and the other side of the elastic member (15) abuts against the third connector (13).

6. The bidirectional rotary hinge according to claim 5, characterized in that, The second connector (12) has a limiting part (125), and the third connector (13) has an abutting part (133). The limiting part (125) is located on the rotation path of the abutting part (133).

7. The bidirectional rotary hinge according to claim 5, characterized in that, It also includes a limiting member (18), which is disposed in the receiving groove and together with the inner wall of the receiving groove to form a slot (19), and the elastic member (15) is engaged in the slot (19).

8. The bidirectional rotary hinge according to claim 7, characterized in that, The elastic element (15) is a thermoplastic polyurethane elastomer.

9. The bidirectional rotary hinge according to claim 7, characterized in that, The third connector (13) includes a housing (131) and a cover plate (132); the cover plate (132) is engaged with the housing (131) and together they enclose the receiving groove.

10. The bidirectional rotary hinge according to claim 9, characterized in that, The limiting member (18) is made of metal. The housing (131) is used to engage with one end of the temple (14). At least a portion of the limiting member (18) is used to connect the temple (14). At least a portion of the limiting member (18) is installed on the housing (131) by threaded fasteners.

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