CN216956530U - Head-mounted display device - Google Patents

Abstract

The embodiment of the disclosure discloses a head-mounted display device. The specific implementation mode is as follows: the head-mounted display device includes a head-mounted part, a display part, two cantilevers, and a synchronous transmission mechanism. The display part comprises a shell and a positioning seat. The ends of the two cantilevers in the first direction are respectively rotatably connected with two sides of the head-wearing part. The synchronous transmission mechanism comprises a middle transmission piece accommodated in the shell and two side transmission assemblies at least partially accommodated in the shell, and two ends of each side transmission assembly are respectively connected with the middle transmission piece and one of the two suspension arms. The positioning seat is configured to be rotatably connected with the middle transmission piece and prevent the middle transmission piece from displacing relative to the shell, and the synchronous transmission mechanism is configured to enable one cantilever to rotate and drive the other cantilever to synchronously rotate through the synchronous transmission mechanism.

Description

Head-mounted display device

Technical Field

The present disclosure relates to the field of electronic product technology, and in particular, to a head-mounted display device.

Background

The head-mounted display device is a device which can be worn on the head of a user and has a display function, such as augmented reality glasses, virtual reality glasses, mixed reality glasses and the like, and the head-mounted display device realizes powerful functions through software support and is popular with the user. The head-mounted display device generally includes a head-mounted part, two cantilevers, and a display portion, one ends of the two cantilevers are connected to both sides of the head-mounted part, respectively, and the other ends of the two cantilevers are connected to both sides of the display portion, respectively. The two cantilevers can both rotate relative to the headset and the display to adjust the height and angle of the display relative to the user's eyes.

SUMMERY OF THE UTILITY MODEL

The disclosed embodiments provide a head-mounted display device.

In order to achieve the above object, the present application provides the following technical solutions:

the application provides a head-mounted display device, which comprises a head-mounted part, a display part, two cantilevers and a synchronous transmission mechanism, wherein the head-mounted part is configured to form a head-mounted space; the display part comprises a shell and a positioning seat fixedly connected with the shell; the end parts of the two cantilevers in the first direction are respectively and rotatably connected with the two sides of the head-wearing part, and the end parts of the two cantilevers in the second direction are respectively and rotatably connected with the two sides of the shell; the synchronous transmission mechanism comprises a middle transmission piece accommodated in the shell and two side transmission assemblies at least partially accommodated in the shell, and two ends of each side transmission assembly are respectively connected with the middle transmission piece and one of the two cantilevers; the positioning seat is configured to be rotatably connected with the middle transmission piece and prevent the middle transmission piece from displacing relative to the shell, and the synchronous transmission mechanism is configured to enable one cantilever to rotate and drive the other cantilever to synchronously rotate through the synchronous transmission mechanism.

The technical solution of the present disclosure is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram illustrating a user wearing a head-mounted display device provided by an embodiment of the application;

FIG. 2 is a schematic diagram of a head mounted display device provided by an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a display portion of a head-mounted display device provided by an embodiment of the present application being rotated to a horizontal state;

fig. 4 is a schematic diagram illustrating a head-mounted display device provided by an embodiment of the present application in a storage state;

fig. 5 is a schematic structural diagram illustrating a first type of synchronous transmission mechanism mounted on a head-mounted display device provided in an embodiment of the present application (for convenience of illustration, only some components are shown);

fig. 6 is a schematic structural diagram illustrating a weight block disposed in a head-mounted display device according to an embodiment of the present disclosure;

fig. 7 shows an exploded view of a head-mounted display device (part of the components) provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram illustrating a first synchronous transmission mechanism of a head-mounted display device according to an embodiment of the present disclosure;

fig. 9 is an exploded view illustrating a fitting structure of an end part and a damping part in a synchronous drive mechanism of a head mounted display device according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram illustrating a second synchronous transmission mechanism of a head-mounted display device according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram illustrating a third synchronous transmission mechanism of a head-mounted display device according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram illustrating an optical imaging system of a head-mounted display device according to an embodiment of the present disclosure.

In the figure, 100, a head mounted display device; 1. a headgear component; 11. a head wearing space; 2. a cantilever; 3. a display unit; 31. a housing; 311. a main wall; 312. a side wall; 32. positioning seats; 32a, a clamping groove; 33. an optical imaging system; 331. an image source component; 332. an arc-shaped lens; 333. straightening the lens; 4. a synchronous transmission mechanism; 41. a middle transmission member; 411. a shaft body; 412. a fourth universal joint; 413. a second gear; 414. a second timing pulley; 42. a side drive assembly; 421. an end piece; 421a, a first universal joint; 421b, a first gear; 421c, a first timing pulley; 421d, external threads; 422. a transmission member; 422a and a second universal joint; 422b and a third universal joint; 422c, a first bevel gear; 422d and a second bevel gear; 422e, a synchronous belt; 423. a first cross-shaft; 424. a second cross-shaped shaft; 5. a damping member; 51. a nut; 52. a fixed part; 53. a friction plate; 54. a disc spring; 6. and a balancing weight.

It is to be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it for a person skilled in the art by reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 3 and 5, an embodiment of the present application provides a head-mounted display device 100, including a head-mounted part 1, a display part 3, two cantilevers 2, and a synchronous transmission mechanism 4, wherein the head-mounted part 1 is configured to form a head-mounted space 11. For example, referring to fig. 1, the head-worn component 1 may be in a ring shape and may be fitted on the head of the wearer. The display unit 3 includes a housing 31 and a positioning base 32 fixedly connected to the housing 31. Ends of the two cantilevers 2 in the first direction are rotatably connected to both sides of the head mount 1, respectively, and ends of the two cantilevers 2 in the second direction are rotatably connected to both sides of the housing 31, respectively. The synchronous drive 4 comprises a central drive member 41 accommodated in the housing 31 and two side drive assemblies 42 at least partly accommodated in the housing 31. Both ends of each side transmission assembly 42 may be connected to the middle transmission 41 and one of the two suspension arms 2, respectively. The positioning seat 32 is configured to be rotatably connected with the middle transmission piece 41 and prevent the middle transmission piece 41 from displacing relative to the housing 31, and the synchronous transmission mechanism 4 is configured to enable one suspension arm 2 to rotate and drive the other suspension arm 2 to rotate synchronously through the synchronous transmission mechanism 4.

It is noted that the above terms "first direction" and "second direction" may be understood as two directions along the length of the cantilever 2. For example, the direction from the display unit 3 to the head mount 1 on the arm 2 is a first direction, and the direction from the head mount 1 to the display unit 3 on the arm 2 is a second direction.

When the head-mounted display device 100 of the application is used, the two cantilevers 2 can rotate relative to the head-mounted part 1 and the display part 3 so as to adjust the height and the angle of the display part 3 relative to the eyes of a wearer. The components in the synchronous drive 4, i.e. the middle drive member 41 and the side drive assembly 42, are almost rigidly coupled to each other. When the person of wearing is when the every single move angle that needs to adjust cantilever 2, can one hand rotate cantilever 2 of first side, then cantilever 2 of this first side can drive the lateral part drive assembly 42 of first side, and the lateral part drive assembly 42 of first side further drives middle part driving medium 41, and middle part driving medium 41 drives the lateral part driving medium 422 of second side, and finally, the lateral part driving medium 422 of second side drives cantilever 2 of second side and rotates along with cantilever 2 synchronous of first side. The rotation angle of the second side cantilever 2 is the same as that of the first side cantilever 2, the display part 3 is stably supported, the heights of the two sides of the display part 3 are basically consistent, the inclination cannot occur, and the AR viewing effect is good.

It is to be noted that the terms "first side" and "second side" may be understood as both sides, i.e., left and right sides, of the human head in a state where the head-mounted display apparatus 100 is worn on the human head.

The display portion 3 may further include an optical imaging system 33, for example, the optical imaging system 33 shown in fig. 12 is at least partially accommodated in the housing 31, and the optical imaging system 33 may include an image source unit 331 and an optical unit. The image source assembly 331 is used for emitting light capable of forming an image, and the optical assembly is used for changing an optical path of the light emitted by the image source assembly 331 and projecting the light to a first side direction of the image source assembly 331 so that the light can be projected to eyes of a user when the head-mounted display device 100 is worn on the head of the user, thereby forming the image in the eyes of the user. The optical assembly may include an arcuate optic 332 and a flat optic 333. Referring to fig. 12, it is a possible optical solution that the image source assembly 331 can project light in a vertical direction, the straight lens 333 can refract the light emitted from the image source assembly 331 and project the light in a second lateral direction, the arc lens 332 can reflect the light projected by the straight lens 333 and project the light in a first lateral direction, and the light can pass through the straight lens 333 and project the light to the eyes of the user when the user wears the head-mounted display device 100, so as to form a virtual image in the field of view of the user. After wearing the head-mounted display device, the user sees the real world and the virtual picture added in the real world at the same time. For example, virtual cartoon characters are placed on a real-world table, or virtual images and videos are displayed in a field of view.

In one example, two side transmission assemblies 42 may be respectively disposed at two sides of the middle transmission member 41, adjacent end portions of the two side transmission assemblies 42 are respectively in transmission connection with two ends of the middle transmission member 41, and end portions of the two side transmission assemblies 42, which are far away from each other, are respectively connected with the two suspension arms 2, so that the end portions of the two suspension arms 2 in the second direction are respectively rotatably connected with two sides of the housing 31.

Referring to fig. 2, 3 and 4, the head-mounted display device provided by the embodiment of the application has a storage state and a use state. Referring to fig. 1 and 2, in the use state, the display part 3 and the plane where the two cantilevers 2 are located have an included angle, referring to the arrow on the left side in fig. 1, the wearer can rotate the angle of the display part 3 according to the requirement. It should be noted that, in conjunction with fig. 5, the housing 31 may be a flat structure having two main walls 311 sequentially arranged in the thickness direction, and the above-defined angle between the plane where the display part 3 and the suspension arm 2 are located may be understood as an angle between the plane where the main wall 311 is located (for example, the front surface of the display part 3) and the plane where the two suspension arms 2 are located. Referring to fig. 3 and 4, when the head-mounted display device is in the storage state, the display portion 3 is turned over to be located in the same plane as the two cantilevers 2, and it can also be understood that the main body of the display portion 3 and the two cantilevers 2 extend in the same direction, so that the storage volume is reduced, and the head-mounted display device is convenient to be placed in a packaging box. Illustratively, the head-mounted part 1 is in a ring shape, and when the head-mounted display device needs to be stored, the display part 3 may be rotated and the cantilever 2 may be rotated toward the head-mounted part 1 until the display part 3, the cantilever 2 and the ring-shaped head-mounted part 1 may be located in the same plane, or it may be understood that the main body of the display part 3, the two cantilevers 2 and the head-mounted part 1 extend in substantially the same direction. Referring to fig. 4, the head-mounted display device 100 in the storage state is flat as a whole, and can be accommodated in a flat box, so that the head-mounted display device occupies a small space and is convenient to carry.

Referring to fig. 5, 6 and 7, in one possible embodiment, the positioning seat 32 of the head-mounted display device is connected to the inner wall of the casing 31, and the positioning seat 32 is provided with a clamping groove 32 a. The middle transmission member 41 includes a shaft body 411, and the shaft body 411 is rotatably engaged with the engaging groove 32 a.

In this embodiment, the positioning seat 32 is configured to be rotatably connected to the shaft 411, and can prevent the shaft 411 from moving relative to the housing 31, and only allow the shaft 411 to rotate around its own axis. When the angle of adjustment of the rotating display part 3 of the wearer, the middle transmission part 41 inside can be driven to move integrally, the middle transmission part 41 cannot move relative to the housing 31, the interference between the middle transmission part 41 and the components contained in the housing 1 is not easy to occur, and the housing 31 is allowed to rotate to the accommodating state in which the two cantilevers 2 are located on the same plane.

In the embodiment of the present application, the number of the positioning seats 32 is not particularly limited, and one or more positioning seats 32 may be provided. When only one positioning seat 32 is arranged, the two ends of the shaft body 411 can be ensured to be stable. For example, the length of the positioning seat 32 can be extended, and the contact length between the positioning seat 32 and the shaft 411 can be increased.

It should be noted that the positioning seat 32 of the present application may also have other shape configurations, and in principle, as long as it is satisfied that the positioning seat 32 is fixedly connected with the housing 31, and the positioning seat 32 can be connected with the shaft body 411, allowing the shaft body 411 to rotate around its own axis, but the shaft body 411 cannot displace relative to the housing 31. Exemplarily, the axis body 411 may not directly contact with the positioning seat 32, a bearing may be installed in the fastening groove 32a of the positioning seat 32, the axis body 411 runs through the bearing, and the rotation resistance of the axis body 411 is reduced through the setting of the bearing.

Referring to fig. 7, the catching groove 32a may include a circular through groove and a slit communicating with the circular groove, through which the shaft body 411 of the middle driving element 41 may be fitted into the circular groove, and the shaft body 411 may rotate around the circular groove. The positioning seat 32 can be made of a material having a small deformation capability. For example, the positioning seat 32 may be made of plastic, and the width of the gap may be slightly smaller than the cross-sectional diameter of the shaft body 411. When the middle transmission member 41 is installed, the shaft body 411 can be aligned to the notch, and the extrusion force is applied to enable the shaft body 411 to stretch into the notch, so that the notch is opened and deformed. When the shaft body 411 completely slides into the circular through groove, the opening of the positioning seat 32 is deformed, the width of the opening is restored to be smaller than the diameter of the cross section of the shaft body 411, and the shaft body 411 cannot easily separate from the clamping groove 32 a.

Optionally, two or more positioning seats 32 may be disposed on the inner wall of the casing 31, the positioning seats 32 are sequentially arranged along the length direction of the casing 31, and the shaft body 411 of the middle transmission member 41 respectively penetrates through the clamping grooves 32a of the positioning seats 32. Through the design of a plurality of positioning seats 32, the assembly stability of the middle transmission piece 41 is improved, and the middle transmission piece 41 is prevented from being inclined in the shell 31.

In one possible embodiment, as shown in fig. 5, 6 and 7, the housing 31 of the display part 3 includes a main wall 311 and a side wall 312, and the side wall 312 is disposed around the edge of the main wall 311. The side wall 312 and the main wall 311 enclose a cavity in which at least part of the optical imaging system 33 and at least part of the synchronization actuator 4 can be accommodated. The positioning seat 32 is located in the cavity, and the positioning seat 32 is connected to the sidewall 312. The housing 31 may have an elongated box-like structure as a whole, and the housing 31 may include two main walls 311, which may be referred to as an inner main wall and an outer main wall, respectively. The inside main wall may be provided with an avoidance opening for the optical imaging system to project light, and when the head-mounted display device 100 is worn on the head, the inside main wall needs to face the human face. The outer main wall may be located on a side away from the human face, which may be understood as the front side of the display part 3. The inner main wall and the side walls enclose a cavity and an opening communicating with the cavity, and the outer main wall 311 may be connected to the side wall 312 to close the opening. In this embodiment, the positioning seat 32 is disposed on the side wall 312, so that the middle transmission member 41 is correspondingly installed on one side of the cavity close to the side wall 312, the middle transmission member 41 occupies a smaller space in the cavity of the housing 31, and a larger space in the middle is left to conveniently accommodate the structural components of the optical imaging system 33 and other components of the head-mounted display device.

In one possible embodiment, as shown in fig. 5, 6 and 7, each of the two side drive assemblies 42 includes an end member 421 and a drive member 422. End piece 421 is rotatably connected to housing 31 and end piece 421 is connected to boom 2. Drive member 422 is located between end member 421 and middle drive member 41, and drive member 422 is drivingly connected to end member 421 and middle drive member 41, respectively. Drive member 422 is angled with respect to middle drive member 41 and drive member 422 is angled with respect to end member 421.

In this embodiment, the two ends of the housing 31 along the length direction are respectively provided with a through slot communicating with the cavity, and the end members 421 of the two side transmission assemblies 42 are both arranged through the through slot and rotatably engaged with the through slot. The central actuator 41 and actuator 422 are located entirely within the cavity, and the end of end member 421 extending out of the cavity is connected to boom 2. It is to be noted that the end piece 421 and the cantilever 2 can be rotated synchronously, without virtual positions in the direction of rotation, and remain relatively stationary in the direction of rotation indicated by the left arrow in fig. 1. In order to keep the end piece 421 and the cantilever 2 stationary in the rotation direction, the end piece 421 and the cantilever 2 may be connected by interference fit, snap-fit, or fixed by a fastener, as long as they are relatively fixed in the rotation direction. Whereas in a non-rotational direction, such as in the direction of the axis of the end piece 421, there may be a relative movement between the end piece 421 and the cantilever arm 2. For example, the cantilevers 2 may be splayed out relative to the end members 421, and the two cantilevers 2 may be adaptively splayed out or folded in after adjusting the head circumference size of the head-mounted part 1 when the head-mounted display device 100 is worn by different head circumference users. The end piece 421 together with the suspension arm 2 can be rotated relative to the head ring in the direction indicated by the arrow on the right in fig. 1. The housing 31 of the display part 3 can be rotated with respect to the end member 421 to adjust the inclination of the display part 3.

The housing 31 may be generally an elongated flat structure with the side wall 312 having two length sides and two width sides. The through grooves are arranged on the two width sides. The positioning seat 32 can be disposed on one length edge, so that the middle transmission member 41 is deviated from the center position in the housing 31 after being installed on the positioning seat 32. The middle drive member 41 and the end member 421 are not collinear. In order to achieve the driving connection between the central driving member 41 and the end member 421, the driving member 422 is disposed obliquely, and the driving member 422 is sequentially inclined from the width side of the side wall 312 to the length side of the side wall 312, and is connected to the end member 421 and the central driving member 41, respectively. The middle transmission member 41 and the end members 421 and 422 on both sides of the middle transmission member 41 are integrally arranged to form a substantially U-shaped structure, both sides of which are outwardly flared. The synchronous drive mechanism 4 can occupy as little space as possible inside the housing 31, so that more components can be accommodated inside the housing 31, such as the optical imaging system 33, chips, and circuits.

Referring to fig. 8, in one possible embodiment, end member 421 has a first universal joint 421a, transmission member 422 has a second universal joint 422a and a third universal joint 422b disposed at both ends thereof, and middle transmission member 41 has a fourth universal joint 412 disposed at each end thereof. The first universal joint 421a and the second universal joint 422a are connected by a first cross 423, and the third universal joint 422b and the fourth universal joint 412 are connected by a second cross 424.

In the embodiment of the present application, the synchronous transmission mechanism 4 adopts a universal joint transmission manner, so as to realize variable-angle power transmission and change the power transmission direction of the end part 421. The universal joint transmission mode can adopt a cross shaft type rigid universal joint, and is simple in structure, reliable in transmission and high in transmission efficiency. Each universal joint is a rotating fork structure, namely two fork arms arranged at intervals are arranged, and four shafts in the cross shaft are respectively and rotatably connected to the four fork arms of the two universal joints. For example, each shaft of the spider is connected to a respective yoke by a bearing. One of the two adjacent universal joints drives the other universal joint to rotate through the cross shaft. During the rotation process of each part, each bearing can rotate to reduce the friction force. Because the side transmission assemblies 42 on both sides of the middle transmission member 41 are symmetrical in structure, the end members 421 on both sides of the synchronous transmission are rotated at the same angle, and thus the cantilevers 2 on both sides of the display part 3 are moved synchronously.

Referring to fig. 10, the synchronous drive mechanism 4 of the present application may employ a gear drive scheme in addition to a universal joint drive scheme. Illustratively, the end piece 421 has a first gear 421b, the two ends of the transmission piece 422 are respectively provided with a first bevel gear 422c and a second bevel gear 422d, and each end of the middle transmission piece 41 is provided with a second gear 413. The first gear 421b is engaged with the first bevel gear 422c, and the second bevel gear 422d is engaged with the second gear 413.

In this embodiment, the end member 421 may have a first shaft, the first gear 421b is located in the cavity of the housing 31, and the first gear 421b is fixedly connected to the first shaft, and one end of the first shaft extends out of the cavity and is connected to the cantilever 2. The first shaft body and the suspension arm 2 can rotate around the axial direction of the first shaft body. The transmission member 422 includes a second shaft body, a first bevel gear 422c and a second bevel gear 422d are respectively disposed at two ends of the second shaft body, and the second shaft body is disposed to be inclined with respect to the first shaft body. A connecting seat may be disposed in the housing 31, and the second shaft may be rotatably connected to the connecting seat, and the second shaft has no relative translation with respect to the connecting seat, so as to ensure that the gears at two sides thereof respectively maintain a meshed state with the corresponding second bevel gears 422 d. Alternatively, a gear box may be provided on the housing 31, and all the gears on the same side of the synchronous transmission mechanism 4, i.e. the first gear 421b, the second gear 413, the first bevel gear 422c and the second bevel gear 422d, may be installed in the gear box, and the gears are kept in a mutually meshed state, so as to ensure accurate power transmission and no virtual position. It should be noted that, the shapes of the first gear 421b and the second gear 413 are designed according to actual requirements, for example, the first gear 421b and the second gear 413 may also be bevel gears. In the embodiment, each transmission part of the synchronous transmission mechanism 4 adopts gear transmission, the gear transmission has high transmission precision, accurate transmission ratio can be ensured, the gear transmission works reliably, and the service life is long.

Referring to fig. 11, the synchronous transmission mechanism 4 of the present application may adopt a synchronous belt transmission scheme in addition to a universal joint transmission scheme and a gear transmission scheme. Illustratively, the end member 421 has a first timing pulley 421c, a second timing pulley 414 is disposed at each end of the middle transmission member 41, and the transmission member 422 includes a timing belt 422e sleeved on the first timing pulley 421c and the second timing pulley 414.

Can set up a plurality of tooth's sockets on the synchronous pulley along circumference, hold-in range 422e evenly sets up the dogtooth along length direction, and hold-in range 422e meshes with synchronous pulley mutually. In the power transmission process, power is mainly transmitted by the engagement of the convex teeth on the synchronous belt 422e and the tooth grooves on the synchronous belt wheel. The synchronous belt scheme that the transmission of power adopted in this application embodiment has accurate drive ratio, and no slip, the transmission is steady, and the noise is little. The end member 421 may include a first shaft body, the first synchronous pulley 421c may be located in the cavity of the housing 31, and the first synchronous pulley 421c is connected to the first shaft body, and the first shaft body 411 and the cantilever 2 are integrally rotatable in a circumferential direction. The middle transmission member 41 includes a second shaft body, two ends of the second shaft body are respectively provided with a second synchronous pulley 414, the first shaft body is parallel to the second shaft body, the synchronous belt 422e does not need to be inclined, and the synchronous belt 422e is sleeved between the first synchronous pulley 421c and the second synchronous pulley 414. When the wearer rotates the cantilever 2 on the first side, the cantilever 2 on the first side drives the first synchronous pulley 421c on the first side to rotate, and the first synchronous pulley 421c on the first side drives the second synchronous pulley 414 on the first side to rotate through the synchronous belt 422e on the first side, so as to drive the middle transmission member 41 to rotate. The middle transmission member 41 rotates to drive the second synchronous pulley on the second side to rotate, and the second synchronous pulley on the second side rotates to drive the first synchronous pulley 421c on the second side through the synchronous belt 422e on the second side, so as to drive the cantilever 2 on the second side to synchronously move along with the cantilever 2 on the first side.

In a possible embodiment, at least one of the end piece 421, the transmission piece 422 and the middle transmission piece 41 of at least one of the two side transmission assemblies 42 is connected to the housing 31 by means of the damping member 5.

In this embodiment, because of the arrangement of the damping member 5, the resistance between the housing 31 and the synchronous transmission mechanism 4 is increased, so that the housing 31 can be kept relatively still with the synchronous transmission mechanism 4 after rotating, and the display part 3 can be kept in an adjusted position after rotating, thereby providing the best visual experience for the user. After wearing the head-mounted display device 100, the user can rotate the cantilever 2 on one side with one hand, so that the cantilever 2 drives the end piece 421 to rotate. Because of the damping member 5, there may be no relative movement or only slight relative movement between the housing 31 and the end member 421, keeping the position of the end member 421 and the suspension arm 2 substantially unchanged relative to the housing 31. After the swing arm 2 is angularly adjusted in place, the user can rotate the housing 31 against the resistance of the damping member 5, so that the housing 31 rotates relative to the end member 421. During the rotation of the housing 31, the housing 31 drives the middle transmission member 41 to rotate, which can be understood as revolving around a connecting line of the two end members 421 as a rotation axis. In the process, the intermediate transmission member 41 also rotates on its own, and it can be understood that it rotates on its own axis. The revolution and rotation occur during the process that the middle transmission member 41 is driven by the housing 31 to rotate, and the middle transmission member 41 drives the lateral transmission members 42 on both sides to rotate synchronously, so that both sides of the housing 31 rotate by the same angle, and the housing 31 does not skew.

The damping member 5 is disposed between the end member 421 and the housing 31 as an example.

Referring to fig. 9, the end member 421 is provided with an external thread 421d, and the damping member 5 includes a nut 51, a fixing portion 52, a friction plate 53 and a disc spring 54. The nut 51 is screwed to the external thread 421d of the end piece 421, the fixing portion 52 is sleeved on the end piece 421, and the fixing portion 52 is connected to the housing 31. For example, the fixing portion 52 is provided with a first fixing hole, and the fixing portion 52 and the housing 31 are fixedly connected through the first fixing hole and the housing 31, for example, a first fastening member passes through the housing 31 and is connected to the first fixing hole on the fixing portion 52, so as to fixedly connect the fixing portion 52 and the housing 31. The end piece 421 is provided with a second fixing hole through which it is fixedly connected to the suspension arm 2. For example, a second fastener is attached through the cantilever arm 2 to the second fixing hole to fix the cantilever arm 2 and the end member 421. The friction plate 53 and the disc spring 54 are both sleeved on the end member 421, and the friction plate 53 and the disc spring 54 are located between the nut 51 and the fixing portion 52. The nut 51 can be adjusted to approach or separate from the fixing portion 52 by rotating the nut 51 to adjust the damping force. When the housing 31 is rotated in the direction indicated by the left arrow in fig. 1, the relative positions of the cantilever arm 2 and the end piece 421 remain unchanged. When the housing 31 stops applying force after rotating a certain angle, the fixed part 52 can be in a static state because of the large friction between the fixed part 52 and the end part 421, and the housing 31 and the cantilever 2 can be kept unchanged.

In an example, a damping shaft may be disposed between the positioning seat 32 and the middle transmission member 41, and the two are in transmission connection through the damping shaft, so that the display portion 3 can keep the inclination angle unchanged when the display portion is inclined at a certain angle. Of course, in other embodiments of the present application, a damping device may be disposed between the transmission member 422 and the housing 31.

Referring to fig. 6, in a possible embodiment, in order to control the display part 3 to be able to maintain a specific position, a weight 6 may be provided on the housing 31 in the embodiment of the present application. The weight 6 is disposed on one side of the housing 31 along the width direction, and the weight 6 is located at the middle position of the housing 31 along the length direction. After the arm 2 rotates relative to the head mount 1, the display portion 3 automatically rotates relative to the arm 2 by the weight. That is, under the action of the gravity of the counterweight, the housing 3 is driven to rotate relative to the cantilever 2, the housing 3 drives the middle transmission member 41 to rotate around the axis of the end member 421, meanwhile, the middle transmission member 41 rotates along the axis thereof, and finally, the rotation angles of the two sides of the housing 31 around the axis of the end member 421 are the same.

As described above, the side wall 312 has two length sides and two width sides, the two width sides are provided with the through slots, and one length side is provided with the positioning seat 32, so that the middle transmission member 41 is deviated from the central position in the housing 31 after being installed on the positioning seat 32. In this embodiment, the weight 6 may be installed on another length edge of the side wall 312, and is located at the middle position of this length edge, when the cantilever 2 rotates relative to the head-mounted component 1, under the effect of the weight, the display portion 3 automatically rotates relative to the cantilever 2, and finally the side where the weight is located is the bottom side of the housing 31, and at the same time, the inner main wall of the evasion opening for the optical imaging system to project light is provided on the housing 31 and faces the face side of the wearer. Through the setting of this balancing weight 6 for the direct automatically regulated casing 31 angle of head-mounted display device 100 of this application need not the operation of the person of wearing, has promoted experience effect.

The utility model provides a can connect through damping shaft drive between cantilever 2 and the head-mounted part 1 of head-mounted display device 100 for when cantilever 2 rotates certain angle, can keep the position unchangeable, provide a stable comfortable vision viewing angle of wearer, improve AR viewing effect.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the disclosure to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims (3)

1. A head-mounted display device, comprising:

a head-worn part configured to form a head-worn space;

the display part comprises a shell and a positioning seat fixedly connected with the shell;

the end parts of the two cantilevers in the first direction are respectively and rotatably connected with two sides of the head-wearing part, and the end parts of the two cantilevers in the second direction are respectively and rotatably connected with two sides of the shell;

the synchronous transmission mechanism comprises a middle transmission part accommodated in the shell and two side transmission components at least partially accommodated in the shell, and two ends of each side transmission component are respectively connected with the middle transmission part and one of the two cantilevers;

the positioning seat is configured to be rotatably connected with the middle transmission piece and prevent the middle transmission piece from displacing relative to the shell, and the synchronous transmission mechanism is configured to enable one cantilever to drive the other cantilever to synchronously rotate through the synchronous transmission mechanism when the other cantilever rotates.

2. The head-mounted display device of claim 1, wherein the housing comprises a main wall and a side wall, the side wall is disposed around a periphery of the main wall, the positioning seat is connected to the side wall, a locking groove is disposed on the positioning seat, the middle transmission member comprises a shaft body, and the shaft body is rotatably locked in the locking groove;

the head-mounted display equipment comprises a balancing weight, wherein the balancing weight is arranged on one side of the shell along the width direction and is positioned in the middle of the shell along the length direction;

the head-mounted display equipment has a storage state and a use state, and in the use state, an included angle is formed between the display part and a plane where the two cantilevers are located; in the storage state, the display part is turned to be positioned in the same plane as the two cantilevers.

3. The head-mounted display device of claim 1, wherein each of the two side driving assemblies comprises an end piece and a driving piece, the two end pieces are rotatably connected to the housing and respectively connected to the two suspension arms, each driving piece is located between the middle driving piece and one of the two end pieces, and each driving piece is in driving connection with the middle driving piece and one of the two end pieces, each driving piece is at an angle to the middle driving piece, and each driving piece is at an angle to the adjacent end piece;

wherein said end member, said drive member and said central drive member are arranged in one of the following configurations:

the end part is provided with a first universal joint, a second universal joint and a third universal joint are respectively arranged at two ends of the transmission piece, a fourth universal joint is arranged at each end part of the middle transmission piece, the first universal joint and the second universal joint are connected through a first cross shaft, and the third universal joint and the fourth universal joint are connected through a second cross shaft;

the end part is provided with a first gear, a first bevel gear and a second bevel gear are respectively arranged at two ends of the transmission piece, a second gear is arranged at each end of the middle transmission piece, the first gear is meshed with the first bevel gear, and the second bevel gear is meshed with the second gear;

the end part is provided with a first synchronous belt wheel, each end part of the middle transmission part is provided with a second synchronous belt wheel, and the transmission part comprises a synchronous belt sleeved on the first synchronous belt wheel and the second synchronous belt wheel;

wherein at least one of said end members, said drive members and said middle drive member of at least one of said two side drive assemblies is connected to said housing by a dampening member.

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