Head circumference structure and head-mounted display device

Abstract

The invention provides a head circumference structure which comprises a front shell, a first connecting mechanism, a first guide rope, a first driving mechanism and a first traction mechanism, the two sides of the front shell are provided with a first end and a second end respectively, the first end is connected with a first head band, and the first head band is of a flexible structure; the first guide cable can keep the self structural shape in a normal state and deform under the action of external force, the driving end of the first guide cable is connected with the first driving mechanism, and the guide end of the first guide cable is driven to extend out of or retract into the front shell under the action of the first driving mechanism; the first traction mechanism is used for pulling the first guide cable to deform so that the free end of the first head band can be connected with the second end of the front shell through the connecting mechanism. The head circumference structure is of an open structure, when the head circumference structure is worn, the guide end of the first guide rope automatically stretches out and draws back to drive the first head band to be in butt joint and connection with the second end of the front shell, the two hands of a user can be liberated, and the first head band is of a flexible structure so that the wearing comfort can be improved.

Description

Technical Field

[0001] This application relates to the field of head-mounted devices, specifically to a head circumference structure and a head-mounted display device. Background Technology

[0002] Currently, the headband structure of head-mounted display devices is mainly a closed structure, or requires users to manually connect the headband to the front shell of the head-mounted display to form a closed structure. This makes them bulky, inconvenient to place or carry, and requires both hands to cover the head when wearing them, resulting in a poor wearing experience. Summary of the Invention

[0003] On one hand, embodiments of this application provide a head circumference structure, including a front shell, a first connecting mechanism, a first guide cable, a first driving mechanism, and a first traction mechanism. The front shell has a first end and a second end on each side, and the first end is connected to a first headband.

[0004] The first guide cable can maintain its own structural shape under normal conditions and deform under external force. The first guide cable has a guide end and a drive end. The guide end of the first guide cable is fixedly connected to one end of the first headband, and the other end of the first headband is fixedly connected to the first end of the front shell. The first headband is a flexible structure. The drive end of the first guide cable is connected to the first drive mechanism and is driven by the first drive mechanism to extend or retract the guide end of the first guide cable into the front shell.

[0005] The connecting mechanism is used to connect the free end of the first headband and the second end of the front shell;

[0006] The first traction mechanism is fixedly connected to the guide end of the first guide cable. The first traction mechanism is used to traction the first guide cable to deform so that the connecting mechanism connects the free end of the first headband to the second end of the front shell.

[0007] On the other hand, embodiments of this application provide a head-mounted display device, including a head-mounted display body and the head circumference structure described above. The head-mounted display body is disposed within the front shell and is used to transmit optical signals.

[0008] The headband structure provided in this embodiment is an open structure. When worn, a first driving mechanism drives the guide end of the first guide cable to extend beyond the first end of the front shell. The first guide cable guides the first headband, causing it to extend. After the first guide cable extends a certain length, a first traction mechanism pulls the guide end of the first guide cable to bend around the user's head and connect with the second end of the front shell. A connecting mechanism connects the free end of the first headband to the second end of the front shell. Subsequently, the first driving mechanism drives the first guide cable to retract back to the first end of the front shell, thereby tightening the first guide cable and ensuring the headband structure is securely worn on the user's head. The automatic extension and retraction of the guide end of the first guide cable, which connects the first headband to the second end of the front shell, frees the user's hands and improves the wearing experience. The flexible structure of the first headband further enhances wearing comfort. When not in use, the first driving mechanism can drive the guide end of the first guide cable to retract back to the first end of the front shell, reducing space occupation and facilitating storage or carrying. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of a head-mounted display device in one embodiment;

[0011] Figure 2 yes Figure 1 A schematic diagram of the head circumference structure in the embodiment;

[0012] Figure 3 yes Figure 2 An exploded view of the head circumference structure in the embodiment;

[0013] Figure 4 yes Figure 2 A front view of the head circumference structure in the embodiment when it is open;

[0014] Figure 5 This is a schematic diagram of the head circumference structure in another embodiment;

[0015] Figure 6 yes Figure 5 An exploded view of the head circumference structure in the embodiment;

[0016] Figure 7 yes Figure 5 A front view of the head circumference structure in the embodiment when it is open;

[0017] Figure 8 yes Figure 5 A front view of the head circumference structure when closed in the embodiment;

[0018] Figure 9 yes Figure 2 An exploded view of the connecting mechanism in the embodiment;

[0019] Figure 10 This is an exploded view of the connecting mechanism in another embodiment;

[0020] Figure 11 yes Figure 10 An exploded view of the connecting mechanism from another perspective in the embodiment. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0022] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0023] In the embodiments of this application, "connection" can be a direct connection or an indirect connection through other structures or components.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a head-mounted display device in one embodiment. This application provides a head-mounted display device, including a head-mounted display body 200 and a head-circle structure 100. The head-circle structure 100 includes a front shell 10, and the head-mounted display body 200 is disposed within the front shell 10 for transmitting optical signals. The head-circle structure 100 can fix the head-mounted display body 200 to the user's head. It should be noted that the head-mounted display device in this application can be a smart glasses structure and form, including AR, VR, XR, MR, etc.

[0026] Please see Figure 2 and Figure 3 , Figure 2 yes Figure 1 A schematic diagram of the head circumference structure in the embodiment. Figure 3 yes Figure 2 An exploded view of the head circumference structure in this embodiment. The head circumference structure 100 in this embodiment includes a front shell 10, a first connecting mechanism 20, a first guide cable 91, a first driving mechanism 30, and a first traction mechanism 40. The front shell 10 has a first end 11 and a second end 12 on each side. The first end 11 is connected to a first headband 50. The first guide cable 91 can maintain its structural shape under normal conditions and deform under external force. The first guide cable 91 can be a strip structure made of rubber, plastic, metal, or composite materials. In this embodiment, the first guide cable 91 is made of steel wire rope. The cross-section of the first guide cable 91 can be circular, annular, polygonal, etc., without specific limitation here. The first guide cable 91 has a guide end 91a and a driving end 91b. The first headband 50 has a connecting end 50a and a free end 50b. The guide end 91a of the first guide cable 91 is fixedly connected to the free end 50b of the first headband 50, and the connecting end 50a of the first headband 50 is connected to the first end 11 of the front shell 10. The first headband 50 has a flexible structure, and the first guide cable 91 is sleeved inside the first headband 50 to ensure wearing comfort. The driving end 91b of the first guide cable 91 is connected to the first driving mechanism 30, and under the action of the first driving mechanism 30, the guiding end 91a of the first guide cable 91 extends or retracts into the front shell 10. The first end 11 of the front shell 10 is provided with a first through hole 111, and the driving end 91b of the first guide cable 91 passes through the first through hole 111 and connects to the first driving mechanism 30.

[0027] Optionally, a first guide cable 91 is provided, which is arranged along the length direction of the first headband 50 on one side of the first headband 50. The connecting end 50a of the first headband 50 is fixedly connected to the first end 11 of the front shell 10. The first drive mechanism 30 includes a first coil 31, which is driven to rotate by a motor. The driving end 91b of the first guide cable 91 is wound and fixed on the first coil 31. The axis of rotation of the first coil 31 is parallel to a third direction (i.e., Figure 2 (Z direction shown). The motor is installed inside the front housing 10, and its specific location is not limited. The specific structure of the connection between the motor and the first coil 31 is familiar to those skilled in the art and will not be described in detail here. When the guide end 91a of the first guide cable 91 extends out of the first end 11 of the front housing 10, it can drive the free end 50b of the first headband 50 to extend; when the guide end 91a of the first guide cable 91 retracts to the first end 11 of the front housing 10, the first headband 50 made of flexible structure can be arbitrarily wound and placed inside the front housing 10.

[0028] Optionally, two first guide cables 91 are provided, with the two first guide cables 91 extending along the length direction of the first headband 50 (i.e., Figure 2 The Y-direction shown is arranged on both sides of the first headband 50. The connecting end 50a of the first headband 50 is fixedly connected to the first end 11 of the front shell 10. The first drive mechanism 30 includes two first coils 31. The two first coils 31 are driven to rotate in opposite directions by a first dual-axis motor 32. The driving ends 91b of the two first guide cables 91 are respectively wound and fixed on the two first coils 31. The rotation axes of the two first coils 31 are parallel to the third direction. Under the drive of the dual-axis motor, the two first coils 31 synchronously take in and release the two first guide cables 91. The first dual-axis motor 32 is installed inside the front shell 10. The specific structure of the first dual-axis motor 32 is a dual-axis motor with rotors rotating in opposite directions at both ends, which is well known to those skilled in the art and will not be described in detail here.

[0029] Optionally, two first guide cables 91 are provided, arranged on both sides of the first headband 50 along its length. The connecting end 50a of the first headband 50 is fixedly connected to the first end 11 of the front housing 10. The first drive mechanism 30 includes a first coil 31, which is driven to rotate by a motor. The driving ends 91b of the two first guide cables 91 are wound and fixed on the first coil 31. The axis of rotation of the first coil 31 is parallel to the fourth direction (i.e., Figure 2 (As shown in the X direction), the first reel 31 rotates while simultaneously winding and unwinding the two first guide cables 91.

[0030] Optionally, two first guide cables 91 are provided, arranged on both sides of the first headband 50 along its length. The connecting end 50a of the first headband 50 passes through the first through hole 111 and is fixedly connected to the driving end 91b of the first guide cable 91. The first driving mechanism 30 includes a first coil 31, which is driven to rotate by a motor. The driving ends 91b of the two first guide cables 91 and the connecting end 50a of the first headband 50 are wound and fixed on the first coil 31. The axis of rotation of the first coil 31 is parallel to the fourth direction. When the first coil 31 rotates, it can drive the two first guide cables 91 to extend and retract, thereby causing the first headband 50 to extend and retract. In this embodiment, when the head-mounted display device is not in use, the first headband 50 and the first guide cables 91 can be directly retracted into the front shell 10 through the first through hole 111 for easy storage.

[0031] Please see Figure 3 and Figure 4 , Figure 4 yes Figure 2 The front view of the headband structure in the embodiment when open. The connecting mechanism 20 is used to connect the free end 50b of the first headband 50 and the second end 12 of the front shell 10. Specifically, in this embodiment, the connecting mechanism 20 includes a first magnet 21 and a second magnet 22. The first magnet 21 is fixedly connected to the free end 50b of the first headband 50, and the second magnet 22 is fixedly connected to the second end 12 of the front shell 10. The magnetic poles of the end of the first magnet 21 away from the first headband 50 and the end of the second magnet 22 away from the front shell 10 are opposite. Thus, when the free end 50b of the first headband 50 is close to the second end 12 of the front shell 10, the first magnet 21 and the second magnet 22 can attract each other, thereby connecting the free end 50b of the first headband 50 to the second end 12 of the front shell 10.

[0032] Please see Figure 3 The first traction mechanism 40 is fixedly connected to the guide end 91a of the first guide cable 91. The first traction mechanism 40 is used to traction the first guide cable 91 to deform so that the connecting mechanism 20 connects the free end 50b of the first headband 50 to the second end 12 of the front shell 10.

[0033] Specifically, the first traction mechanism 40 includes a first traction rope 41, which has a fixed end 41b and a traction end 41a. The fixed end 41b of the first traction rope 41 is fixedly connected to the guide end 91a of the first guide cable 91. The traction end 41a of the first traction rope 41 is connected to the front shell 10. When the guide end 91a of the first guide cable 91 extends out of the front shell 10, the traction end 41a of the first traction rope 41, under tension, pulls the first guide cable 91 towards the second end 12 of the front shell 10, causing it to bend and deform. A first limiting hole 112 is provided at the first end 11 of the front shell 10. The traction end 41a of the first traction rope 41 can pass through the first limiting hole 112. The first traction rope 41 is a flexible structure, and the traction end 41a of the first traction rope 41 can move axially relative to the first limiting hole 112, thereby driving the fixed end 41b of the first traction rope 41 and the free end 50b of the first headband 50 to move. The user can manually pull the traction end 41a of the first traction rope 41. The traction end 41a of the first traction rope 41 is provided with a limiting structure on the side of the first limiting hole 112 away from the free end 50b of the first headband 50, which is used to prevent the traction end 41a of the first traction rope 41 from disengaging from the first limiting hole 112. The limiting structure can be a limiting plate, knot, etc., which are well known to those skilled in the art.

[0034] Since the first guide cable 91 can maintain its structural shape under normal conditions, when the guide end 91a of the first guide cable 91 gradually extends to the outside of the front shell 10 under the action of the first drive mechanism 30, the first guide cable 91 can provide support force to the first headband 50, causing the first headband 50 to automatically extend. Since the first guide cable 91 can deform under the action of external force, when the first guide cable 91 extends to a certain length, by stretching the traction end 41a of the first traction rope 41, the fixed end 41b of the first traction rope 41 provides tension to the guide end 91a of the first guide cable 91, causing the first guide cable 91 to bend and deform in the direction of the second end 12 of the front shell 10, causing the first headband 50 to extend around the user's head, so that the first magnet 21 and the second magnet 22 are attracted together. During wear, the first guide cable 91 extends from the first end 11 of the front shell 10 under the action of the first drive mechanism 30, that is, it gradually extends from the side of the user's cheek to the back of the user's head. When the first traction rope 41 pulls the first guide cable 91 to bend and deform, the user's head is supported on the inside of the first guide cable 91 and the first headband 50 (that is, the side of the first headband 50 near the second end 12 of the front shell 10), so that the first guide cable 91 can adapt to the bending and deformation of the user's head. It can be understood that when the first magnet 21 and the second magnet 22 approach each other, the attraction between them also plays a guiding role in the bending and deformation direction of the first guide cable 91, so that the first guide cable 91 can be accurately aligned and connected with the second end 12 of the front shell 10. After the first magnet 21 and the second magnet 22 are attracted together, that is, after the free end 50b of the first headband 50 is connected to the second tube of the front shell 10, the guide end 91a of the first guide cable 91 is driven by the first drive mechanism 30 to retract to the first end 11 of the front shell 10 to tighten the first guide cable 91, thereby stably wearing the headband structure 100 on the user's head.

[0035] Please see Figure 5 , Figure 5 This is a schematic diagram of the headband structure in another embodiment. In some embodiments, the headband structure 100 further includes a second headband 80, which has a connecting end 80a and a free end 80b. The connecting end 80a of the second headband 80 is fixedly connected to the second end 12 of the front shell 10, and the free end 80b of the second headband 80 is fixedly connected to the second magnet 22. The second headband 80 can be a rigid structure or a semi-rigid structure that maintains its own structural shape under normal conditions and deforms under external force. The second headband 80 is arc-shaped near the side close to the first headband 50 to facilitate a fit to the user's head. The second headband 80 can be set to be shorter; optionally, the length of the second headband 80 can extend to behind the user's ear. This reduces the curvature of the bend when the first traction cord 41 pulls the first headband 50 during use, facilitating the alignment and connection of the first magnet 21 and the second magnet 22. When the head-mounted display device is not in use, the second headband 80 will not occupy too much space for easy storage.

[0036] Please see Figure 5 and Figure 6 , Figure 6 yes Figure 5 An exploded view of the head circumference structure in this embodiment. In some embodiments, the head circumference structure 100 further includes a second guide cable 92, a second traction mechanism 70, and a second drive mechanism. The second guide cable 92 can maintain its structural shape under normal conditions and deform under external force. In this embodiment, the second guide cable 92 is made of steel wire rope. The second headband 80 is a flexible structure, and the second guide cable 92 is sleeved inside the second headband 80. The second guide cable 92 has a guide end 92a and a drive end 92b. The guide end 92a of the second guide cable 92 is fixedly connected to the free end 80b of the second headband 80, and the connecting end 80a of the second headband 80 is connected to the second end 12 of the front shell 10. The drive end 92b of the second guide cable 92 is connected to the second drive mechanism, and under the action of the second drive mechanism, the guide end 92a of the second guide cable 92 is driven to extend or retract into the front shell 10. The second end 12 of the front shell 10 is provided with a second through hole 121, and the drive end 92b of the second guide cable 92 passes through the second through hole 121 and is connected to the second drive mechanism.

[0037] In this embodiment, two second guide cables 92 can be provided, with the two second guide cables 92 extending along the length direction of the second headband 80 (i.e., Figure 2 The second headband 80 (shown in the Y direction) is positioned on both sides of the second headband 80, and the connecting end 80a of the second headband 80 is fixedly connected to the first end of the front shell. The second drive mechanism includes two second coils 61, which are driven to rotate in opposite directions by a second dual-axis motor 62. The driving ends 92b of the two second guide cables 92 and the connecting end 80a of the second headband 80 are wound and fixed on the second coils 61. The rotation axis of the second coils 61 is parallel to a third direction. When the second coils 61 rotate, they can drive the two second guide cables 92 to extend and retract. The specific structure of the second dual-axis motor 62 is a dual-axis motor with rotors rotating in opposite directions at both ends, which is well known to those skilled in the art and will not be described in detail here. In this embodiment, when the head-mounted display device is not in use, the second guide cables 92 can be directly retracted into the front shell 10 through the second through hole 121 for easy storage.

[0038] Please see Figure 6The second traction mechanism 70 is fixedly connected to the guide end 92a of the second guide cable 92. The first traction mechanism 40 and the second traction mechanism 70 are respectively used to pull the first guide cable 91 and the second guide cable 92 to bend towards each other, so that the first magnet 21 and the second magnet 22 attract each other. Specifically, the second traction mechanism 70 includes a second traction rope 71, which has a fixed end 71b and a traction end 71a. The fixed end 71b of the second traction rope 71 is fixedly connected to the guide end 92a of the second guide cable 92, and the traction end 71a of the second traction rope 71 is connected to the front shell 10. When the guide end 92a of the second guide cable 92 extends out of the front shell 10, the traction end 71a of the second traction rope 71 pulls the guide end 92a of the second guide cable 92 to bend and deform closer to the first guide cable 91 under tension. The second end 12 of the front shell 10 has a second limiting hole 122. The traction end 71a of the second traction rope 71 can pass through the second limiting hole 122. The second traction rope 71 is a flexible structure, and the traction end 71a of the second traction rope 71 can move axially relative to the second limiting hole 122, thereby driving the fixed end 71b of the second traction rope 71 and the free end 80b of the second headband 80 to move. The user can manually pull the traction end 71a of the second traction rope 71. The traction end 71a of the second traction rope 71 has a limiting structure on the side of the second limiting hole 122 away from the free end 80b of the second headband 80 to prevent the traction end 71a of the second traction rope 71 from disengaging from the second limiting hole 122. The limiting structure can be a limiting plate, knot, etc., which are well known to those skilled in the art.

[0039] In this embodiment, the first headband 50 and the second headband 80 are symmetrically installed on both sides of the front shell 10. When worn, the guide ends 91a of the first guide cable 91 and 92a of the second guide cable 92 extend out of the front shell 10 under the action of the first drive mechanism 30 and the second drive mechanism, respectively, causing the first headband 50 and the second headband 80 to extend from the side of the user's cheek to the back of the head. Then, by stretching the traction ends 41a of the first traction rope 41 and 71a of the second traction rope 71, the guide ends 91a of the first guide cable 91 and 92a of the second guide cable 92 bend towards each other, thereby causing the first magnet 21 and the second magnet 22 to attract each other. Then, the first drive mechanism 30 drives the first guide cable 91 to retract to the first end 11 of the front shell 10, and the second drive mechanism drives the second guide cable 92 to retract to the second end 12 of the front shell 10, tightening the first guide cable 91 and the second guide cable 92, and stably wearing the head circumference structure 100 on the user's head.

[0040] Please see Figure 5 and Figure 6Optionally, the first traction rope 41 and the second traction rope 71 can also be driven by a motor to achieve winding and unwinding. For example, a first spool 42 is rotatably mounted on the first end 11 of the front housing 10, and the traction end 41a of the first traction rope 41 is wound and fixed on the first spool 42. The first spool 42 is driven to rotate by a motor mounted on the front housing 10. A second spool 72 is rotatably mounted on the second end 12 of the front housing 10, and the traction end 71a of the second traction rope 71 is wound and fixed on the second spool 72. The second spool 72 is driven to rotate by a motor mounted on the front housing 10. Both the first spool 42 and the second spool 72 are parallel to the fourth direction. It is understood that the motors driving the first traction rope 41, the second traction rope 71, the first guide cable 91, and the second guide cable 92 are independent of each other.

[0041] Please see Figure 7 and Figure 8 , Figure 7 yes Figure 5 A front view of the head circumference structure when it is open in the embodiment. Figure 8 yes Figure 5 A front view of the head circumference structure in the embodiment when closed. When worn, the guide ends 91a of the first guide cable 91 and 92a of the second guide cable 92 extend from the first end 11 and second end 12 of the front shell 10 respectively, driven by their respective connected motors. The first spool 42 and the second spool 72 rotate forward under the drive of their respective connected motors (i.e.,...). Figure 5 As shown in direction C, the wires are laid out so that the fixed end 41b of the first traction rope 41 extends synchronously with the guide end 91a of the first guide rope 91, and the fixed end 71b of the second traction rope 71 extends synchronously with the guide end 92a of the second guide rope 92. After extending a certain length, the first spool 42 and the second spool 72 rotate in opposite directions. Then, the first traction rope 41 and the second traction rope 71 pull the first headband 50 and the second headband 80 to bend towards each other, thereby causing the first magnet 21 and the second magnet 22 to align and attract each other. Subsequently, the guide ends 91a of the first guide rope 91 and 92a of the second guide rope 92 retract from the first end 11 and the second end 12 of the front shell 10, respectively, tightening the first guide rope 91 and the second guide rope 92.

[0042] It should be noted that during the bending process, the first guide cable 91 and the second guide cable 92 are respectively guided by the traction of the first traction rope 41 and the second traction rope 71, as well as the attraction between the first magnet 21 and the second magnet 22, and bend symmetrically along both sides of the user's head, ultimately achieving the alignment and connection of the first magnet 21 and the second magnet 22.

[0043] Please see Figure 9 , Figure 9 yes Figure 2An exploded view of the connecting mechanism in the embodiment. In some embodiments, the connecting mechanism 20 further includes a male locking body 23 and a female locking body 24. The male locking body 23 is fixedly connected to the free end 50b of the first headband 50, and the first magnet 21 is fixedly connected to the end of the male locking body 23 away from the first headband 50. The female locking body 24 is fixedly connected to the free end 80b of the second headband 80, and the second magnet 22 is fixedly connected to the end of the female locking body 24 away from the second headband 80. When the first magnet 21 and the second magnet 22 are attracted, the male locking body 23 and the female locking body 24 engage.

[0044] Specifically, in this embodiment, the male lock body 23 includes a lock hook 231, and the female lock body 24 extends along the first direction (i.e., Figure 9 A lock hole 241 is provided in the direction E shown in the diagram, and a lock body 24 is provided along the second direction (i.e., Figure 9 As shown in the S direction, a receiving cavity 242 is provided, which communicates with the lock hole 241. The second direction is perpendicular to the first direction. A lock cylinder 243 and a drive assembly 244 are provided in the receiving cavity 242. The lock cylinder 243 can move towards the lock hole 241 and engage with the lock hook 231 inserted into the lock hole 241 under the drive of the drive assembly 244, or move away from the lock hole 241 to disengage from the lock hook 231. In some scenarios, the lock hook 231 has a slot 2313 on the side near the receiving cavity 242, and the lock cylinder 243 can be inserted into the slot 2313 to engage with the lock hook 231, so as to prevent the lock hook 231 from detaching from the main lock body 24. In some scenarios, the lock hook 231 includes a fixedly connected insertion end 2311 and a locking end 2312. The diameter of the insertion end 2311 is smaller than the diameter of the locking end 2312. The insertion end 2311 has a conical structure so that when the first magnet 21 and the second magnet 22 approach each other, the insertion end 2311 and the locking end 2312 are inserted into the lock hole 241 in sequence, and the lock cylinder 243 can abut against the locking end 2312 to prevent the lock hook 231 from detaching from the main lock body 24. In some scenarios, there are two or more lock hooks 231 symmetrically arranged, and the number of lock holes 241, lock cylinders 243 and drive components 244 corresponds one-to-one with the number of lock hooks 231.

[0045] Please continue reading Figure 9Optionally, the drive assembly 244 includes a shape memory alloy wire 2441. Both ends of the shape memory alloy wire 2441 are fixedly connected to the inner walls of the lock cylinder 243 and the receiving cavity 242 along a second direction, respectively. The shape memory alloy wire 2441 is connected to a power source. In the de-energized state, the shape memory alloy wire 2441 holds the lock cylinder 243 against the inner walls of the receiving cavity 242, and in the energized state, it pulls the lock cylinder 243 away from the lock hole 241. This embodiment uses a double-pass shape memory alloy wire 2441. It should be understood that the shape memory alloy wire 2441 has a unique shape memory effect and superelastic properties, and has advantages such as simple structure, small size, light weight, high energy density, large strain, and high flexibility. As a good actuating element, the double-ended shape memory alloy wire 2441 will contract like a muscle when driven by current, and will return to its original length when the current is unloaded and cooled to room temperature. In this embodiment, the shape memory alloy wire 2441 can be wound into a spring shape. In the power-off state, the shape memory alloy wire 2441 acts as a spring to hold the lock cylinder 243 against the inner wall of the receiving cavity 242. In the power-on state, the shape memory alloy wire 2441 contracts and pulls the lock cylinder 243 away from the lock hole 241, thereby releasing the lock hook 231. Furthermore, the drive assembly 244 also includes a first elastic element 2442, which may be a sheet, spring, etc. The first elastic element 2442 is installed in the receiving cavity 242 and abuts against the lock cylinder 243 and the inner wall of the receiving cavity 242, so that the lock cylinder 243 always has a tendency to move closer to the key hole 241. The first elastic element 2442 always abuts against the lock cylinder 243 and the inner wall of the receiving cavity 242 to improve the stability when the lock cylinder 243 and the lock hook 231 are engaged. When it is necessary to release the lock hook 231, the shape memory alloy wire 2441 needs to overcome the elastic force of the first elastic element 2442.

[0046] Please see Figure 10 and Figure 11 , Figure 10 This is an exploded view of the connecting mechanism in another embodiment. Figure 11 yes Figure 10 An exploded view of the connecting mechanism from another perspective in the embodiment. Optionally, the main lock body 24 is also provided with a driving cavity 246, and a connecting hole 247 is provided between the driving cavity 246 and the receiving cavity 242. The driving assembly 244 includes a second elastic element 2443, a pull rope 2444, a driving arm 245 disposed in the driving cavity 246, and a driving member 2445. The second elastic element 2443 is installed in the receiving cavity 242 and abuts against the lock cylinder 243 and the inner wall of the receiving cavity 242, so that the lock cylinder 243 always has a tendency to move towards the lock hole 241, thereby realizing the locking function. The second elastic element 2443 can be a spring, a sheet, etc.

[0047] The drive arm 245 has a fixedly connected rotating end 245b and a swing end 245a. The rotating end 245b of the drive arm 245 is rotatably connected in the drive cavity 246. One end of the pull rope 2444 is fixedly connected to the lock cylinder 243, and the other end passes through the connecting hole 247 and is fixedly connected to the rotating end 245b of the drive arm 245. The swing end 245a of the drive arm 245 extends along the first direction. The swing end 245a of the drive arm 245 swings under the action of the drive member 2445, thereby driving the rotating end 245b to rotate.

[0048] Understandably, the drive arm 245 has room to move within the drive cavity 246. The connection point between the pull rope 2444 and the rotating end 245b is not on the same axis as the rotation center of the rotating end 245b. The rotating end 245b includes a rotating boss 2451, with a rotating shaft 2452 at its center. Fixed posts 2453 are provided around the periphery of the rotating boss 2451. The rotating boss 2451 rotates around the rotating shaft 2452, and the pull rope 2444 is wound and fixed to the fixed posts 2453. The pull rope 2444 is a flexible structure that can only withstand tensile force. The length of the pull rope 2444 is adapted to the distance from the lock cylinder 243 to the fixed post 2453. Thus, when the swing end 245a of the drive arm 245 swings, it drives the rotating boss 2451 and the rotating shaft 2452 to rotate, which in turn drives the pull rope 2444 to move. The pull rope 2444 pulls the lock cylinder 243 away from the lock hole 241 to release the lock hook 231.

[0049] The drive element 2445 includes an electric push rod, the output end of which abuts against the swing end 245a of the drive arm 245. When the lock hook 231 needs to be released, the electric push rod extends to push the swing end 245a of the drive arm 245 to swing. The drive element 2445 can also be other linear drive mechanisms well known to those skilled in the art, and no specific limitation is made here. The cooperation of the drive arm 245, the drive element 2445, and the pull rope 2444 can apply a greater retraction force to the lock cylinder 243, facilitating the unlocking function.

[0050] Furthermore, a cover plate 249 is detachably mounted on the main lock body 24. The cover plate 249 is installed on the side of the receiving cavity 242 and the driving cavity 246. The cover plate 249 can be detachably and fixedly connected to the main lock body 24 by means of buckles, bolts, etc. A button 248 is provided on the main lock body 24. The button 248 includes a mounting plate 2481 and a wedge block 2482. A slot is provided on the cover plate 249. The mounting plate 2481 is disposed in the slot and fixedly connected to the main lock body 24 by the cover plate 249. The wedge block 2482 is elastically connected to the mounting plate 2481. The opposite surfaces of the wedge block 2482 and the driving arm 245 are not parallel. Under pressure, the wedge block 2482 inserts into the driving cavity 246 and squeezes the driving arm 245, causing the swing end 245a of the driving arm 245 to swing, thereby driving the rotating boss 2451 to rotate.

[0051] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. A head circumference structure, characterized in that, The system includes a front shell, a first connecting mechanism, a first guide cable, a first driving mechanism, and a first traction mechanism. The front shell has a first end and a second end on each side, and the first end is connected to a first headband. The first guide cable can maintain its structural shape under normal conditions and deform under external force. The first guide cable has a guide end and a drive end. The first headband has a connecting end and a free end. The guide end of the first guide cable is fixedly connected to the free end of the first headband. The connecting end of the first headband is fixedly connected to the first end of the front shell. The first headband is a flexible structure. The drive end of the first guide cable is connected to the first drive mechanism and, under the action of the first drive mechanism, drives the guide end of the first guide cable to extend or retract into the front shell. The connecting mechanism is used to connect the free end of the first headband and the second end of the front shell; The first traction mechanism is fixedly connected to the guide end of the first guide cable. The first traction mechanism is used to traction the first guide cable to deform so that the connecting mechanism connects the free end of the first headband to the second end of the front shell.

2. The head circumference structure according to claim 1, characterized in that, The connecting mechanism includes a first magnet connected to the free end of the first headband and a second magnet connected to the second end of the front shell, wherein the first magnet and the second magnet can attract each other.

3. The head circumference structure according to claim 2, characterized in that, The first traction mechanism includes a first traction rope, which has a fixed end and a traction end. The fixed end of the first traction rope is fixedly connected to the guide end of the first guide cable. The traction end of the first traction rope is connected to the front shell. When the guide end of the first guide cable extends out of the front shell, the traction end of the first traction rope, under tension, pulls the first guide cable to bend and deform towards the second end of the front shell.

4. The head circumference structure according to claim 3, characterized in that, The head circumference structure also includes a second headband, one end of which is connected to the second end of the front shell, and the other end is fixedly connected to the second magnet.

5. The head circumference structure according to claim 4, characterized in that, The headband structure also includes a second guide cable, a second traction mechanism, and a second drive mechanism. The second guide cable can maintain its own structural shape under normal conditions and deform under external force. The second headband is a flexible structure. The second guide cable has a guide end and a drive end. The guide end of the second guide cable is fixedly connected to the free end of the second headband. The drive end of the second guide cable is connected to the second drive mechanism and is driven by the second drive mechanism to extend or retract the guide end of the second guide cable into the front shell. The second traction mechanism is fixedly connected to the guide end of the second guide cable. The first traction mechanism and the second traction mechanism are respectively used to pull the first guide cable and the second guide cable to bend towards each other, so that the first magnet and the second magnet attract each other.

6. The head circumference structure according to claim 5, characterized in that, The second traction mechanism includes a second traction rope, which has a fixed end and a traction end. The fixed end of the second traction rope is fixedly connected to the guide end of the second guide cable, and the traction end of the second traction rope is connected to the front shell. When the guide end of the second guide cable extends out of the front shell, the traction end of the second traction rope is pulled by the tension to bend and deform towards the direction of the first guide cable.

7. The head circumference structure according to any one of claims 4-6, characterized in that, The connecting mechanism further includes a male lock body and a female lock body. The male lock body is fixedly connected to the free end of the first headband, and the first magnet is fixedly connected to the end of the male lock body away from the first headband. The female lock body is fixedly connected to the free end of the second headband, and the second magnet is fixedly connected to the end of the female lock body away from the second headband. When the first magnet and the second magnet are attracted to each other, the male lock body and the female lock body engage.

8. The head circumference structure according to claim 7, characterized in that, The male lock body includes a lock hook, and the female lock body has a lock hole along a first direction and a receiving cavity along a second direction. The receiving cavity communicates with the lock hole, and the second direction is perpendicular to the first direction. The receiving cavity is provided with a lock cylinder and a driving assembly. The lock cylinder can move towards the lock hole and engage with the lock hook inserted into the lock hole under the drive of the driving assembly, or move away from the lock hole to disengage from the lock hook.

9. The head circumference structure according to claim 8, characterized in that, The drive assembly includes a shape memory alloy wire. The two ends of the shape memory alloy wire are fixedly connected to the lock cylinder and the inner wall of the receiving cavity along the second direction, respectively. The shape memory alloy wire is connected to a power source. When the power is off, the shape memory alloy wire holds the lock cylinder against the inner wall of the receiving cavity, and when the power is on, it pulls the lock cylinder away from the keyhole.

10. The head circumference structure according to claim 9, characterized in that, The drive assembly further includes a first elastic element, which is installed in the receiving cavity and abuts against the lock cylinder and the inner wall of the receiving cavity, so that the lock cylinder always tends to move towards the keyhole.

11. The head circumference structure according to claim 8, characterized in that, The main lock body also has a drive cavity, and a communication hole is provided between the drive cavity and the receiving cavity. The drive assembly includes a second elastic element, a pull rope, a drive arm disposed in the drive cavity, and a drive component. The second elastic element is installed in the receiving cavity and abuts against the lock cylinder and the inner wall of the receiving cavity, so that the lock cylinder always has a tendency to move closer to the key hole; The drive arm has a rotating end and a swinging end. The rotating end is rotatably connected in the drive cavity. One end of the pull rope is fixedly connected to the lock cylinder, and the other end passes through the connecting hole and is fixedly connected to the rotating end of the drive arm. The swinging end of the drive arm extends along the first direction and swings under the action of the drive member, thereby driving the rotating end of the drive arm to rotate.

12. The head circumference structure according to claim 11, characterized in that, The driving component includes an electric push rod, the output end of which abuts against the swing end of the driving arm.

13. The head circumference structure according to claim 11, characterized in that, A button is provided on the main lock body. The button includes a mounting plate and a wedge block. The mounting plate is fixedly connected to the main lock body, and the wedge block is elastically connected to the mounting plate. Under pressure, the wedge block is inserted into the drive cavity and squeezes the drive arm, causing the swing end of the drive arm to swing, thereby driving the rotating end of the drive arm to rotate.

14. The head circumference structure according to any one of claims 1-3, characterized in that, The first driving mechanism includes a first reel, which is driven to rotate by a motor, and the driving end of the first guide cable is wound and fixed on the first reel.

15. The head circumference structure according to any one of claims 1-3, characterized in that, The first guide cable is fitted inside the first headband.

16. The head circumference structure according to any one of claims 1-3, characterized in that, The first guide cable has a strip-shaped structure.

17. A head-mounted display device, characterized in that, It includes a head-mounted display body and a head circumference structure as described in any one of claims 1-16, wherein the head-mounted display body is disposed within the front shell and is used to transmit optical signals.

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