CN110109250B

CN110109250B - Adjustment mechanism and head-mounted display device

Info

Publication number: CN110109250B
Application number: CN201910390907.6A
Authority: CN
Inventors: 刘玉红; 田文红; 井颢然; 马占山; 彭金豹; 张�浩; 陈丽莉; 孙志宇; 郑超; 葛峥
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2022-11-04
Anticipated expiration: 2039-05-10
Also published as: CN110109250A

Abstract

Provided are an adjustment mechanism and a head-mounted display device including the same. The adjustment mechanism includes a focusing assembly and a pupil adjustment drive member. The focusing assembly includes: a lens mounting part for mounting a lens, a display device mounting part for mounting a display device, a telescopic adjustment part, and a first guide part. The telescopic adjustment part is connected with at least one of the lens mounting part and the display device mounting part and is configured to enable the relative position of the display device mounting part and the lens mounting part in the telescopic direction to be adjustable. The first guide part is matched with the pupil adjusting driving component to drive and guide the focusing component to move relative to the pupil adjusting driving component in the transverse direction crossed with the telescopic direction. The adjustment mechanism may allow for adjustment of both the focal length and the interpupillary distance.

Description

Adjustment mechanism and head-mounted display device

Technical Field

Embodiments of the present disclosure relate to an adjustment mechanism and a head-mounted display device.

Background

A head mounted display device chamber is a device worn on a user's head to display an image. As an example of a head-mounted display device, head-mounted virtual reality glasses (head-mounted VR glasses) block a person's vision from the outside world, guiding the user to create a sensation of being in a virtual environment.

In general, the distance from a display screen (display panel) in VR glasses to a lens on the user side is fixed, and the distance between optical components corresponding to both glasses in VR glasses is also fixed, that is, the focal length and the interpupillary distance of VR glasses are not adjustable.

Disclosure of Invention

There is provided in accordance with at least one embodiment of the present disclosure an adjustment mechanism including a focusing assembly and a pupil adjustment drive member. The focusing assembly includes: the display device includes a lens mounting portion for mounting a lens, a display device mounting portion for mounting a display device, a telescopic adjustment portion, and a first guide portion. The telescopic adjustment part is connected with at least one of the lens mounting part and the display device mounting part and is configured to enable the relative position of the display device mounting part and the lens mounting part in the telescopic direction to be adjustable. The first guiding part is matched with the pupil adjusting driving member to drive and guide the focusing assembly to move in a transverse direction crossed with the telescopic direction relative to the pupil adjusting driving member.

For example, in some embodiments, the pupil adjustment drive member comprises an adjustment screw. The adjusting screw includes a first screw portion extending in a transverse direction. The first guide portion includes a second spiral portion. The second spiral portion cooperates with the first spiral portion such that rotation of the adjustment screw causes the focus assembly to move relative to the adjustment pupil drive member in a lateral direction different from the extension direction.

For example, in some embodiments, the adjustment screw further includes a driven portion configured to receive a driving action that drives rotation of the adjustment screw.

For example, in some embodiments, the adjustment mechanism further includes a first drive device and is configured to couple with the driven portion and to drive the adjustment screw in rotation.

For example, in some embodiments, the telescopic adjustment portion includes a second guide portion and a third guide portion. The second guide portion engages and guides the third guide portion in the telescopic direction such that the display device mounting portion is defined to move in the telescopic direction relative to the lens mounting portion, whereby the relative position of the display device mounting portion and the lens mounting portion in the telescopic direction is adjustable.

For example, in some embodiments, the telescoping adjustment feature comprises a first sleeve comprising the second guide portion and a bracket comprising the third guide portion, whereby the first sleeve is relatively translatable relative to the bracket in the telescoping direction.

For example, in some embodiments, the first sleeve is fixedly attached to or integrally formed with the lens mount portion, and the bracket is fixedly attached to or integrally formed with the display device mount portion and the first guide portion.

For example, in some embodiments, the first sleeve is fixedly attached to or integrally formed with the display device mounting portion, and the bracket is fixedly attached to or integrally formed with the lens mounting portion and the first guide portion.

For example, in some embodiments, the telescoping adjustment section further comprises a second sleeve. The first sleeve is coaxial with the second sleeve, and the axial direction of the first sleeve is the telescopic direction. The second sleeve is mounted to the bracket. The second sleeve is configured to be rotatable about an axial direction thereof, and includes a third spiral portion extending in a telescopic direction. The first sleeve includes a fourth helical portion. The fourth helical portion cooperates with the third helical portion such that rotation of the second sleeve causes the first sleeve to move in a telescoping direction relative to the frame.

For example, in some embodiments, the telescoping adjustment section further comprises a third sleeve secured to the bracket. The third sleeve is coaxial with the first and second sleeves. The second sleeve is sleeved on the third sleeve and is configured to be rotatable relative to the third sleeve about an axial direction thereof.

For example, in some embodiments, the first sleeve is fixedly connected to or integrally formed with the display device mounting portion, the third sleeve is fixedly connected to or integrally formed with the lens mounting portion, and the bracket is fixedly connected to or integrally formed with the first guide portion.

For example, in some embodiments, the focus assembly further comprises a second drive configured to drive rotation of the second sleeve. The second sleeve includes a transmission portion for transmission connection with a second drive.

For example, in some embodiments, the adjustment mechanism further comprises a position sensing device. The position sensing device is configured to sense a position of the first sleeve relative to the bracket.

For example, in some embodiments, the position sensing device includes a switching device secured to one of the first sleeve and the bracket and an engagement device secured to the other of the first sleeve and the bracket. The position sensing device is configured to cause the second driving device to stop driving the second sleeve or to drive the second sleeve to rotate in a direction opposite to a direction of previous rotation when the first sleeve is moved to a predetermined position relative to the support.

There is provided a head mounted display apparatus according to at least one embodiment of the present disclosure, including a first display device, a first lens, a pupil adjustment driving member, and a first focusing assembly. The first focusing assembly includes: the display device comprises a first lens mounting part for mounting a first lens, a first display device mounting part for mounting a first display device, a first telescopic adjusting part and a first guide part. The first telescopic adjustment part is connected with at least one of the first lens mounting part and the first display device mounting part and is configured to enable the relative position of the first display device mounting part and the first lens mounting part in the telescopic direction to be adjustable. The first guide part is matched with the pupil adjusting driving member to drive and guide the first focusing assembly to move in a transverse direction crossed with the expansion and contraction direction relative to the pupil adjusting driving member.

For example, in some embodiments, the head mounted display apparatus further includes a second display device, a second lens, and a second focusing assembly. The second focusing assembly includes: a second lens mounting part for mounting a second lens, a second display device mounting part for mounting a second display device, a second telescopic adjustment part and a fourth guide part. The fourth guide portion is connected to at least one of the second lens mounting portion and the second display device mounting portion, and is configured such that a relative position of the second display device mounting portion and the second lens mounting portion in the telescopic direction is adjustable. The fourth guide part is matched with the pupil adjusting driving component to drive and guide the second focusing assembly to move in the transverse direction relative to the pupil adjusting driving component.

For example, in some embodiments, the pupil-adjusting drive member comprises an adjustment screw comprising a first helical portion extending in the lateral direction and a fifth helical portion extending in the lateral direction. The first guide portion includes a second spiral portion. The fourth guide portion includes a sixth spiral portion. The second helical portion cooperates with the first helical portion and the sixth helical portion cooperates with the fifth helical portion such that rotation of the adjustment screw causes the first and second focus assemblies to move oppositely in a lateral direction.

For example, in some embodiments, the head mounted display device further comprises a housing. The pupil adjustment drive member is fixed to the housing. The housing includes a housing guide portion. The first focus assembly further includes a fifth guide portion. The housing guide portion engages and guides the fifth guide portion such that the first focus assembly is constrained to move in a lateral direction relative to the housing.

For example, in some embodiments, the fifth guide portion includes a first substructure and a second substructure. The first and second substructures are parallel to each other and located on either side of the first focus assembly.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from the drawings without inventive effort.

Fig. 1A illustrates a schematic block diagram of an adjustment mechanism in accordance with at least one embodiment of the present disclosure.

Fig. 1B illustrates a perspective view of an adjustment mechanism according to an embodiment of the present disclosure.

FIG. 2 illustrates an exploded perspective view of the adjustment mechanism of FIG. 1B.

FIG. 3 shows a cross-sectional view of a portion of the adjustment mechanism of FIG. 1B.

Fig. 4 illustrates a perspective view of a first bracket according to at least one embodiment of the present disclosure.

Fig. 5 illustrates a perspective view of a first sleeve according to at least one embodiment of the present disclosure.

Fig. 6 illustrates a perspective view of a second sleeve according to at least one embodiment of the present disclosure.

Fig. 7 illustrates a perspective view of a second drive arrangement in accordance with at least one embodiment of the present disclosure.

Fig. 8 illustrates a perspective view of a portion of a position sensing device in accordance with at least one embodiment of the present disclosure.

Fig. 9 illustrates a perspective view of a portion of an adjustment mechanism in accordance with at least one embodiment of the present disclosure.

Fig. 10 illustrates an exploded perspective view of a portion of an adjustment mechanism according to another embodiment of the present disclosure.

Fig. 11 shows a perspective view of a part of the adjusting mechanism shown in fig. 10, respectively.

Fig. 12 shows another perspective view of a portion of the adjustment mechanism shown in fig. 10, respectively.

Fig. 13 illustrates a perspective view of a guide of an adjustment mechanism according to another embodiment of the present disclosure.

Fig. 14 illustrates a perspective view of a second sleeve of an adjustment mechanism according to another embodiment of the present disclosure.

Fig. 15A and 15B respectively illustrate perspective views of a portion of a head mounted display device according to at least one embodiment of the present disclosure.

Fig. 16 illustrates an exploded perspective view of a head mounted display device according to at least one embodiment of the present disclosure.

Fig. 17 illustrates another exploded perspective view of a head mounted display device according to at least one embodiment of the present disclosure.

Detailed Description

Hereinafter, an imaging apparatus and an electronic device including the same according to embodiments of the present disclosure are described in detail with reference to the accompanying drawings. To make the objects, technical solutions and advantages of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure.

Thus, the following detailed description of the embodiments of the present disclosure, presented in conjunction with the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without inventive step, are intended to be within the scope of the present disclosure.

The singular forms include the plural unless the context otherwise dictates otherwise. Throughout the specification, the terms "comprises," "comprising," "has," "having," and the like are used herein to specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

In addition, even though terms including ordinal numbers such as "first", "second", etc., may be used to describe various elements, the elements are not limited by the terms, and the terms are used only to distinguish one element from another.

At least one embodiment of the present disclosure provides an adjustment mechanism including a focusing assembly and a pupil adjustment drive member. The focusing assembly includes a lens mounting part for mounting a lens, a display device mounting part for mounting a display device, a telescopic adjustment part, and a first guide part. The telescopic adjustment part is connected with at least one of the lens mounting part and the display device mounting part and is configured to enable the relative position of the display device mounting part and the lens mounting part in the telescopic direction to be adjustable. The first guide part is matched with the pupil adjusting driving member to drive and guide the focusing assembly to move in a transverse direction crossed with the telescopic direction relative to the pupil adjusting driving member.

In the above-described embodiments of the present disclosure, the adjustment mechanism is provided with a focus adjustment assembly having a telescopic adjustment portion so that the relative position of the lens mounting portion and the display device mounting portion in the telescopic direction is adjustable, thereby adjusting the focal length of each focus adjustment assembly.

Further, in the above-described embodiments of the present disclosure, the first guide portion cooperates with the pupil adjustment driving member to guide and drive the focus adjustment assembly to move in the lateral direction, thereby adjusting the lateral position of the focus adjustment assembly. The focusing assembly may be one or more. Taking an adjustment mechanism having two focusing assemblies as an example, the adjustment mechanism allows a head mounted display device or other device to which it is mounted to have an adjustable monocular pupillary distance or an adjustable (binocular) pupillary distance, thereby facilitating use by a user.

In the present disclosure, the pupil distance of a single eye represents the distance from the center of the lens of the focusing assembly to the midline of the head mounted display device or other device, and the pupil distance represents the distance between the centers of the lenses of the focusing assembly located on the left and right sides of the midline of the head mounted display device or other device.

In at least one embodiment of the present disclosure, the adjustment mechanism can adjust both the focal length and the interpupillary distance, facilitating the use for the user.

Fig. 1A illustrates a schematic block diagram of an adjustment mechanism 100 in accordance with at least one embodiment of the present disclosure. As shown in fig. 1A, the adjustment mechanism 100 includes a first focus assembly 130, a second focus assembly 140, and a pupil drive member 150.

As shown in fig. 1A, the first focusing assembly 130 includes a first lens mounting part 1313 for mounting the first lens 160, a first display device mounting part 1343 for mounting the first display device 170, a first telescopic adjustment part, and a first guide part 1311. The first telescopic adjustment portion is connected to at least one of the first lens mounting portion 1313 and the first display device mounting portion 1343, and is configured to allow a relative position between the first display device mounting portion 1343 and the first lens mounting portion 1313 in a telescopic direction to be adjustable. The first guide portion 1311 cooperates with the pupil adjustment drive member 150 to drive and guide the first focus adjustment assembly 130 to move relative to the pupil adjustment drive member 150 in a lateral direction that intersects the telescopic direction.

Further, as shown in fig. 1A, the first telescopic adjustment portion includes a second guide portion 1312 and a third guide portion 1341. The second guide portion 1312 engages and guides the third guide portion 1341 in the telescopic direction such that the first display mount 1343 is defined to move in the telescopic direction with respect to the first lens mount 1313, whereby the relative position of the first display mount 1343 and the first lens mount 1313 in the telescopic direction is adjustable.

As shown in fig. 1A, the second focusing assembly includes a second lens mounting part for mounting the second lens 180, a second display device mounting part for mounting the second display device 190, a second telescopic adjustment part, and a fourth guide part 1411, similarly to the first focusing assembly 130. The second telescopic adjusting part is connected with at least one of the second lens mounting part and the second display device mounting part and is configured to enable the relative position of the second display device mounting part and the second lens mounting part in the telescopic direction to be adjustable. The fourth guide portion 1411 cooperates with the pupil adjustment driving member 150 to drive and guide the first focusing assembly 140 to move in a lateral direction crossing the telescopic direction with respect to the pupil adjustment driving member 150.

Further, the second telescopic adjustment portion includes a seventh guide portion and an eighth guide portion. The seventh guide portion engages and guides the eighth guide portion in the telescopic direction so that the second display device mounting portion is defined to move in the telescopic direction relative to the second lens mounting portion, whereby a relative position of the second display device mounting portion and the first lens mounting portion in the telescopic direction is adjustable.

Fig. 1B illustrates a perspective view of an adjustment mechanism 100 in accordance with at least one embodiment of the present disclosure. Fig. 2 shows an exploded perspective view of the adjustment mechanism 100 of fig. 1B. FIG. 3 illustrates a cross-sectional view of a portion of the adjustment mechanism 100 of FIG. 1B.

The first focusing assembly 130 and the pupil drive member 150 are described in detail below. As shown in fig. 1B-3, the first focusing assembly 130 and the second focusing assembly 140 are juxtaposed in a lateral direction, e.g., they may be symmetrically disposed with respect to each other with respect to a central axis of the adjustment mechanism 100, in which case the description of the first focusing assembly 130 may be equally applicable to the second focusing assembly 140. However, it should be noted that in other embodiments, the first focusing assembly 130 and the second focusing assembly 140 may be arranged differently and asymmetrically.

The first telescopic adjustment portion of the exemplary first focusing assembly 130 shown in fig. 1B-3 includes a first bracket 131, a first sleeve 134, a second sleeve 132, and a third sleeve 133. In the present embodiment, as an example, the first lens mounting part 1313 (see fig. 4), the first guide part 1311 (see fig. 4) are formed integrally with the first bracket 131, and the second guide part 1312 is formed integrally with the first bracket 131. The first display panel mounting portion 1343 (see fig. 5) is formed integrally with the first sleeve 134, and the third guide portion 1341 (see fig. 5) is formed integrally with the first sleeve 134. It should be noted that "integrally formed" may also be "fixedly connected", e.g. by welding, screwing, adhesive, snap-fit structures, etc.

The first sleeve 134, the second sleeve 132, the third sleeve 133, and the second driving device 135 are all connected to the first bracket 131, and are all supported by the first bracket 131. Thus, movement of the first support 131 will result in movement of the entire first focus assembly 130. The first, second, and

third sleeves

134, 132, 133 are each generally cylindrical in shape and have a common axis. Here, the direction of the axis is referred to as a telescopic direction of the first focusing assembly 130.

Fig. 4 illustrates a perspective view of a first bracket 131 in accordance with at least one embodiment of the present disclosure. As shown in fig. 4, the first guide portion 1311 of the first bracket 131 includes a screw hole having a second screw portion 13111.

As shown in fig. 2, the pupil adjustment drive member 150 comprises an adjustment screw. The axis direction of the adjusting screw is a transverse direction, and the transverse direction is crossed with the telescopic direction. For example, in the present embodiment, the lateral direction is perpendicular to the telescopic direction. The adjusting screw includes a first screw portion 151 extending in a transverse direction.

The first screw part 151 is screwed into the screw hole of the first guide part 1311 to be engaged with the second screw part 13111, forming a screw-nut transmission. Accordingly, the rotational movement of the adjustment screw may be converted into the linear movement of the first guide portion 1311 (i.e., the first bracket 131) in the axial direction with respect to the adjustment screw.

The adjustment screw further includes a driven portion 152 configured to receive a driving action that drives rotation of the adjustment screw, thereby causing rotation of the adjustment screw.

For example, a user may manually apply a driving force to the driven portion 152 to cause the adjustment screw to rotate. In this case, the driven portion 152 may be configured in a shape suitable to be manually driven. For example, the driven portion 152 may have a disk body and a plurality of teeth adapted to be dialed.

For example, a driving force may be automatically applied to the driven portion 152 by a driving device to rotate the adjusting screw. For example, in this case, the driven part 152 may be configured as a gear coaxial with the first screw part 151. And the adjustment mechanism 100 may include a first driving device 154 connected to the driven part 152 and driving the pupil-adjusting driving member 150 to rotate. As shown in fig. 1B, the first driving device 154 may be disposed below the driven portion 152 or at another position.

Further, the driven part 152 may be configured to be capable of being driven both manually and automatically.

Since the first helical portion 151 mates with the second helical portion 13111, rotation of the adjustment screw causes the first focus assembly 130 to move in a lateral direction relative to the adjustment pupil drive member 150. For example, the pupil-adjusting drive member 150 may be supported to a housing 110 of the device to which the adjustment mechanism 100 is mounted (see fig. 15A and 15B), the housing 110 causing the pupil-adjusting drive member 150 to be fixed in the lateral direction, thereby causing the first focus assembly 130 to move in the lateral direction relative to the housing 110. Movement of the first focusing assembly 130 in a lateral direction may be used to adjust at least one of the interpupillary distance and the monocular interpupillary distance.

In other embodiments, the first guide portion 1311 and the pupil adjustment drive member 150 may also have other configurations.

For example, in another embodiment, the first guide portion 1311 may comprise a rack and the pupil adjustment drive member 150 may comprise a gear that mates with the rack. The rack may extend in a lateral direction, and an axial direction of the gear may be parallel to the telescopic direction.

For example, in another embodiment, the first guide portion 1311 may comprise a pawl bar and the pupil adjustment drive member 150 may comprise a ratchet that mates with the pawl bar. The pawl bar may extend in a lateral direction, and the axial direction of the ratchet may be parallel to the telescoping direction.

In other embodiments, the first guiding portion 1311 may be disposed at other parts besides the first bracket 131, for example, at the first sleeve 134, the second sleeve 132, the third sleeve 133, etc., and may drive the first focusing assembly 130 to move transversely as a whole due to the integral assembly of the first focusing assembly 130.

In the present embodiment, the first guide portion 1311 is integrally formed with the first bracket 131. In other embodiments, first guide portion 1311 may be a separate component fixedly attached to first bracket 131.

As shown in fig. 4, the first bracket 131 further includes a fifth guide portion 1314.

The pupil adjustment drive member 150 is supported to the housing 110 including a housing guide portion. The case guide portion may fit and guide the fifth guide portion 1314 such that the first bracket 131 is defined to move in a lateral direction with respect to the case 110. For example, the case guide portion may be a slide groove extending in the lateral direction, and the fifth guide portion 1314 may be a slider sliding in the slide groove. In the present embodiment, the fifth guide portion 1314 and the housing guide portion have higher strength than the first guide portion 1311 and the pupil-adjusting drive member 150. In order to prevent damage to the first helical portion 151 of the pupil adjusting drive member 150 and the second helical portion 13111 of the first guiding portion 1311, a fifth guiding portion 1314 and a housing guiding portion are provided. The fifth guide portion 1314 and the housing guide portion can more stably guide the movement of the first bracket 131 with respect to the housing 110 and the pupil adjustment drive member 150 fixed to the housing 110.

Fifth lead portion 1314 may include first substructure 13141 and second substructure 13142. First substructure 13141 and second substructure 13142 are parallel to one another and are located on opposite sides of first frame 131 from one another, such as on opposite sides of first focus assembly 130, as shown on both upper and lower sides of first focus assembly 130. For example, the first substructure 13141 and the second substructure 13142 may be a first slider and a second slider, respectively.

Correspondingly, the housing guiding portion may comprise a first and a second sub-housing guiding structure 1121, for example a first and a second runner, respectively, for cooperating with the first and the

second sub-structure

13141, 13142, respectively.

The inclusion of fifth leading portion 1314 of first substructure 13141 and second substructure 13142 parallel to each other helps balance the forces experienced by first support 131.

In other embodiments, the fifth guide portion 1314 may be provided at other parts than the first bracket 131 together with the first guide portion 1311, for example, at the first sleeve 134, the second sleeve 132, the third sleeve 133, and the like.

As shown in fig. 4, the second guide portion 1312 of the first bracket 131 is a groove extending in the telescopic direction, for example, the groove includes two long bars spaced apart from each other by a predetermined distance and extending in parallel to define a concave portion of the groove.

Fig. 5 illustrates a perspective view of the first sleeve 134 in accordance with at least one embodiment of the present disclosure. As shown in fig. 5, the third guide portion 1341 of the first sleeve 134 includes a protrusion protruding vertically downward. For example, the protrusion may have a cylindrical shape or a rectangular parallelepiped shape. In other embodiments, the protrusion may be a separate component, such as a cylindrical guide, that is removably secured to the first sleeve 134. A separate guide may facilitate the machining of first sleeve 134, and the assembly of first focus assembly 130.

The second guide portion 1312 engages and guides the third guide portion 1341 in a telescopic direction such that the first sleeve 134 is defined to move in a telescopic direction with respect to the first bracket 131. For example, the protrusion of the first sleeve 134 is inserted into the groove of the first bracket 131 to slidably move in the groove.

As shown in fig. 5, the first sleeve 134 also includes a fourth helical portion 1342.

Fig. 6 illustrates a perspective view of a second sleeve 132 according to at least one embodiment of the present disclosure. As shown in fig. 6, the second sleeve 132 includes a third screw portion 1321 and a transmission portion 1322, which are respectively provided at both ends of the second sleeve 132 in the axial direction. The transmission portion 1322 may be configured as a gear. The diameter of the driving portion 1322 is larger than that of the third screw portion 1321. In this embodiment, the second sleeve 132 is sleeved in the first sleeve 134, accordingly, the third screw portion 1321 is external thread, the fourth screw portion 1342 is internal thread, and the third screw portion 1321 is matched with the fourth screw portion 1342.

Accordingly, in another example, not shown, the second sleeve is sleeved outside the first sleeve, accordingly, the third helical portion of the first sleeve is an internal thread, the fourth helical portion of the second sleeve is an external thread, and the third helical portion is mated with the fourth helical portion.

The second sleeve 132 is mounted to the first bracket 131, and the second sleeve 132 is configured to be rotatable about an axial direction thereof (i.e., a telescopic direction). For example, referring back to fig. 2 and 3, the third sleeve 133 is fixed to the first bracket 131, e.g., snapped to the first bracket 131. The second sleeve 132 is sleeved to the third sleeve 133, and is configured to be rotatable about its axial direction relative to the third sleeve 133. That is, the third sleeve 133 serves to rotatably support the second sleeve 132. Also, the second sleeve 132 and the third sleeve 133 may be configured to be unable to move relative to each other in the telescopic direction.

The third screw portion 1321 engages with the fourth screw portion 1342 to form a screw drive. Since the first sleeve 134 is defined to move in the telescopic direction with respect to the first bracket 131, the rotation of the second sleeve 132 causes the first sleeve 134 to move in the telescopic direction with respect to the first bracket 131.

As described above, in the present embodiment, the first bracket 131 has the first lens mounting portion 1313, and the first lens 160 can be mounted to the first lens mounting portion 1313. The first lens 160 may be a single lens, or a lens group including one or more sub-lenses. Further, as described above, the first sleeve 134 has the first display device mounting portion 1343, and the first display device 170 may be mounted to the first display device mounting portion 1343. The first lens 160 may include, for example, a convex lens, a concave lens, a meniscus lens, and the like. Further, the first lens 160 may include, for example, a glass lens, a plastic lens, or the like. The first display device 170 may be, for example, an LED display device (e.g., micro-LED display device), an OLED display device, an LCD display device, etc., for example, providing a rectangular display area.

The first lens 160 is used to guide imaging of the first display device 170, so that a user can view display contents of the first display device 170 through the first lens 160, thereby realizing a display effect such as virtual reality.

For example, the first lens mounting part 1313 may be a recess complementary in shape to the first lens 160, into which the first lens 160 may be received. The first lens 160 may be fixed to the first lens mounting portion 1313 of the first bracket 131 using a screw or an adhesive. The first display device mounting portion 1343 may be a recess complementary in shape to the first display device 170, into which the first display device 170 may be received.

The first cover plate 136 is fixed to the first sleeve 134 to fix the first display device 170 to the first display device mounting portion 1343 of the first sleeve 134. Accordingly, movement of the first sleeve 134 relative to the first support 131 may cause movement of the first lens 160 relative to the first display device 170, thereby adjusting the focal length. In the illustrated embodiment, since the movement of the first sleeve 134 relative to the first bracket 131 is only in the telescoping direction, the first sleeve 134 does not rotate relative to the first bracket 131. Accordingly, the first lens 160 is only translated in the telescopic direction with respect to the first display device 170, and is not rotated with respect to the first display device 170. Accordingly, the first lens 160 may be ensured to better image the first display device 170.

In another embodiment, a first lens mounting part 1313 for mounting the first lens 160 may be provided on the first sleeve 134, and a first display device mounting part 1343 for mounting the first display device 170 may be provided on the first bracket 131, for example, over an extension of the first bracket 131.

In another embodiment, a first lens mounting part 1313 for mounting the first lens 160 may be provided at the second sleeve 132, and a first display device mounting part 1343 for mounting the first display device 170 may be provided at the first sleeve 134. In the embodiments of the present disclosure, the lens mounting part and the display device mounting part may be implemented in various ways, and are not limited to the above-described embodiments.

As described above, in the illustrated embodiment, the second sleeve 132 and the third sleeve 133 are configured to be immovable relative to each other in the telescopic direction. In order to make the second sleeve 132 immovable relative to the third sleeve 133 in the telescopic direction, the second sleeve 132 and the third sleeve 133 are provided with a stopper member, respectively. For example, the second sleeve 132 is provided with a plurality of arc-shaped bars 1323 that protrude in the radial direction and extend in the circumferential direction. In further examples, the plurality of arced strips 1323 may also be connected to form an annular strip. The third sleeve 133 is provided with an annular flange 1331 at an end remote from the first bracket 131. The inner diameter of each arcuate strip 1323 is smaller than the outer diameter of the annular flange 1331. The plurality of arced strips 1323 and the annular flange 1331 act as stop members that collectively limit the relative movement of the second sleeve 132 and the third sleeve 133 in the telescoping direction.

As shown in fig. 3, the third sleeve 133 is sleeved into the second sleeve 132 from the side away from the first bracket 131, and the annular flange 1331 prevents the second sleeve 132 from moving relative to the third sleeve 133 in a direction away from the first bracket 131 by stopping the arc-shaped strip 1323. The third sleeve 133 is provided with a threaded hole 1332 for mounting a screw. Screws are passed through mounting holes 1315 provided in the first bracket 131 to fix the third sleeve 133 to the first bracket 131. The threaded holes 1332 and the mounting holes 1315 are each spaced apart in the circumferential direction. The first bracket 131, which is fixed to the third sleeve 133, prevents the second sleeve 132 from moving relative to the third sleeve 133 in a direction towards the first bracket 131. Therefore, the second sleeve 132 is defined to be immovable in the telescopic direction relative to the third sleeve 133.

As described above, the second sleeve 132 has the transmission portion 1322, and the transmission portion 1322 is configured to be connected to the second driving device 135. The second driving device 135 is configured to drive the rotation of the second sleeve 132. As illustrated in fig. 2, the second driving device 135 may be fixed to the first bracket 131.

Fig. 7 illustrates a perspective view of a second drive device 135 according to at least one embodiment of the present disclosure. As shown in fig. 7, the second transmission includes a motor 1352, an output gear 1353 connected to an output shaft of the motor 1352, and a motor mount 1351 for mounting the motor 1352. The output gear 1353 is engaged with a gear of the second sleeve 132, which is the transmission portion 1322, to drive the rotation of the second sleeve 132. For example, the motor 1352 may be a stepper motor, a servo motor, or the like, e.g., powered by a battery.

As shown in fig. 1B, when the motor 1352 drives the output gear 1353 to rotate counterclockwise, the second sleeve 132 rotates clockwise. The second sleeve 132 rotates clockwise, causing the first sleeve 134 to move away from the first bracket 131, thereby increasing the distance between the first lens 160 and the first display device 170, and achieving focusing. Conversely, when the motor 1352 drives the gear to rotate clockwise, the second sleeve 132 rotates counterclockwise. The counterclockwise rotation of the second sleeve 132 causes the first sleeve 134 to move toward the first bracket 131, thereby reducing the distance between the first lens 160 and the first display device 170, and achieving focusing.

Further, for example, the adjustment mechanism 100 may further include a position sensing device 137 configured to sense a position of the first sleeve 134 relative to the first bracket 131, which may be, for example, a position sensor, a contact position sensor.

For example, the position sensing device 137 may be further configured to cause the second driving device 135 to stop driving the second sleeve 132 or to drive the second sleeve 132 to rotate in a direction opposite to a direction of previous rotation when the first sleeve 134 is moved to a predetermined position with respect to the first bracket 131.

As shown in fig. 1A, the adjustment mechanism may also include a controller 155. The controller 155 may control the focusing operation of the first focusing assembly 130 according to a predetermined program, for example, based on a sensing signal of the position sensing device 137. When sensing that the first sleeve 134 moves to a predetermined position with respect to the first bracket 131, the position sensing device 137 may generate a sensing signal and transmit the sensing signal to the controller 155. When the controller 155 receives the sensing signal, it may control the second driving device 135 to stop driving the second sleeve 132 or to drive the second sleeve 132 to rotate in a direction opposite to a direction of the previous rotation. The controller 155 may be connected to the motor 1352 by wire or wirelessly.

For example, in the case where the adjustment mechanism 100 is used for a head-mounted display device, the focusing operation may be controlled according to the betz training recovery method to treat juvenile pseudomyopia or alleviate eye fatigue. Specifically, the user can alternately see a close view and an infinite view by focusing, thereby achieving the purpose of ciliary muscle training.

The controller 155 may control the operation of the motor 1352 based on the sensing signal of the position sensing device 137 and according to a predetermined program. For example, the controller 155 may control the motor 1352 to continuously rotate counterclockwise to decrease the distance of the first lens 160 from the first display device 170. When the distance decreases to the first predetermined threshold, the controller 155 may control the motor 1352 to rotate clockwise again to increase the distance of the first lens 160 from the first display device 170. When the distance increases to a second predetermined threshold, the controller 155 may control the motor 1352 to rotate again counterclockwise continuously, and so on.

The controller 155 may be a microcontroller, a Field Programmable Gate Array (FPGA) device, or an Application Specific Integrated Circuit (ASIC) chip.

Fig. 8 illustrates a perspective view of a portion of a position sensing device 137 in accordance with at least one embodiment of the present disclosure. Fig. 9 illustrates another perspective view of a portion of an adjustment mechanism in accordance with at least one embodiment of the present disclosure. As shown in fig. 8 and 9, the position sensing device 137 may include a sensor mounting bracket 1371, a switching device 1372, and a mating device 1373.

In this embodiment, the switching device 1372 is fixed to the first bracket 131 by the sensor mount 1371, and the mating device 1373 is fixed to the first sleeve 134. For example, the switching device 1372 may be a touch switch. When the first sleeve 134 moves to the extreme position, the engaging means 1373 touches the touch switch, causing the touch switch to generate a sense signal that causes the controller 155 to control the motor 1352 to commutate. The controller 155 may obtain the displacement of the first sleeve 134 away from the first bracket 131 by counting the number of pulses of the motor 1352 and control the motor 1352 to commutate until the mating device 1373 again touches the touch switch after the number of pulses reaches a predetermined number.

In other embodiments, the switching device 1372 may also be an optoelectronic switch or the like. In other embodiments, the position sensing apparatus 137 may not include the mating device 1373, but only the switching device 1372. Further, in other embodiments, the position sensing device 137 may include a position sensor such as an ultrasonic sensor, a hall sensor, or the like.

As shown in fig. 2, the second focusing assembly 140 includes a second bracket 141, a fourth sleeve 144, a fifth sleeve 142, a sixth sleeve 143, a third driving device 145, and a second cover plate 146, similar to the first focusing assembly 130.

Similarly to the first bracket 131, the second bracket 141 includes a fourth guide portion 1411, and the fourth guide portion 1411 includes a sixth spiral portion.

In the present embodiment, the first and

second focus assemblies

130 and 140 arranged side by side in the lateral direction share one pupil adjustment driving member 150. The pupil adjustment drive member 150 comprises an adjustment screw. The adjusting screw further includes a fifth screw portion 153 extending in the transverse direction. The driven part 152 is disposed between the first screw part 151 and the fifth screw part 153. The fifth screw part 153 cooperates with the sixth screw part such that the adjustment screw 150 and the rotational movement are also converted into a linear movement of the second bracket 141 relative to the adjustment screw.

Thus, rotation of the adjustment screw will simultaneously drive the first and

second focus assemblies

130 and 140 to move in the lateral direction. Appropriately setting the rotational orientation of the first, second, fifth and

sixth screw portions

151, 13111, 153 and sixth screw portions may be such that rotation of the adjustment screw causes the first and

second focus assemblies

130 and 140 to move oppositely in the lateral direction, thereby adjusting the interpupillary distance.

In other embodiments, the pupil adjustment drive member may comprise two adjustment screws. The first and

second focus assemblies

130 and 140 may be driven by respective adjustment screws of the pupil drive member 150. Accordingly, the positions of the first and second focusing

assemblies

130 and 140 in the lateral direction can be independently adjusted, thereby independently adjusting the monocular pupil distance.

In other embodiments, the first telescopic adjustment portion may have other configurations.

Fig. 10 illustrates an exploded perspective view of a portion of an adjustment mechanism according to another embodiment of the present disclosure. Fig. 11 and 12 show perspective views of a portion of the adjustment mechanism shown in fig. 10, respectively.

As shown in fig. 10-12, the adjustment mechanism includes a first focus assembly 230 and a pupil drive member (not shown).

Also, the first focus adjusting assembly 230 in this embodiment includes a first lens mounting part 2341 for mounting the first lens 260, a first display device mounting part 2311 for mounting the first display device 270, a first telescopic adjustment part, and a first guide part (not shown). The first telescopic adjustment portion is connected to at least one of the first lens mounting portion 2341 and the first display device mounting portion 2311, and is configured such that the relative position of the first display device mounting portion 2311 and the first lens mounting portion 2341 in the telescopic direction is adjustable. The first guide portion cooperates with the pupil adjustment driving member to drive and guide the first focus adjustment assembly 230 to move in a lateral direction crossing the telescopic direction with respect to the pupil adjustment driving member.

In addition, the first telescopic adjustment part includes a second guide portion 2331 and a third guide portion 2381. The second guide portion 2331 engages and guides the third guide portion 2381 in the telescopic direction so that the first display device mounting portion 2311 is constrained to move in the telescopic direction relative to the first lens mounting portion 2341, whereby the relative position of the first display device mounting portion 2311 and the first lens mounting portion 2341 in the telescopic direction is adjustable.

As shown, the first focus assembly 230 includes a first bracket 231, a first sleeve 234, a second sleeve 232, a third sleeve 233, and a guide 238. The first, second, and

third sleeves

234, 232, 233 are each generally cylindrical in shape and have a common axis. The direction of this axis is referred to as the telescopic direction of the first focusing assembly 230.

In this embodiment, the third sleeve 233 is fixed to the first bracket 231. The second sleeve 232 is rotatably fitted over the outside of the third sleeve 233. The first sleeve 234 is fitted inside the third sleeve 233, and is configured to be movable in the telescopic direction with respect to the third sleeve 233. The guide 238 is coupled to the first, second, and

third sleeves

234, 232, 233.

In this embodiment, the first support 231 includes a first display device mounting portion 2311 for mounting the first display device 270. The first sleeve 234 includes a first lens mount 2341 for mounting the first lens 260. The relative positions of the first display device mounting portion 2311 and the first lens mounting portion 2341 in the telescopic direction are adjustable.

The third sleeve 233 includes the second guide portion 2331, and, for example, a lens mount 2332 may be further added, and the additional lens 280 is fixed to the third sleeve 233 by the additional lens mount 2332. Of course, the additional lens mounting portion 2332 of the first focusing assembly 230 may be provided on other suitable components, such as on the first bracket 231.

The additional lens 280 and the first lens 260 serve to guide imaging of the first display device 270, and the first lens 260 is disposed between the additional lens 280 and the first display device 270.

In the present embodiment, the distance between the additional lens 280 and the first display device 270 is constant, and the focal length is adjusted by changing the distance between the first lens 260 and the first display device 270.

Fig. 13 illustrates a perspective view of a guide 238 of an adjustment mechanism according to another embodiment of the present disclosure. As shown in fig. 13, the guide 238 includes the third guide portion 2381, as well as a sixth guide portion 2382 and a fixing portion 2383. The guide 238 is secured to the first sleeve 234 by a securing portion 2383, such as by a threaded connection.

The second guide portion 2331 engages and guides the third guide portion 2381 in the telescopic direction such that the first sleeve 234 is defined to move in the telescopic direction with respect to the first bracket 231.

Fig. 14 shows a perspective view of the second sleeve 232 of the adjustment mechanism according to another embodiment of the present disclosure. As shown in fig. 14, the second sleeve 232 includes a fourth spiral part 2321 and a transmission part 2322, and the fourth spiral part 2321 is a spiral opening (or a groove). The sixth guide portion 2382 of the guide 238 may slide in the fourth spiral portion 2321.

The second guide portion 2331 cooperates and guides with the third guide portion 2381 and the sixth guide portion 2383 cooperates and guides with the fourth screw portion 2321 so that rotation of the second sleeve 232 causes movement of the first sleeve 234 in a telescopic direction relative to the third sleeve 233 and the first bracket 231 fixed to the third sleeve 233. Accordingly, the distance between the first lens 260 and the first display device 270 and the distance between the first lens 260 and the additional lens 280 may be changed by rotating the second sleeve 232, thereby adjusting the focal length.

Further, the first focus assembly 230 includes a first guide portion (not shown) that cooperates with the pupil adjustment drive member to drive and guide the first focus assembly 230 to move in a lateral direction relative to the pupil adjustment drive member.

In this embodiment, the first holder 231 may include a first guide portion. The first guide portion and the pupil-adjusting drive member may be configured similarly to the first guide portion 1312 and the pupil-adjusting drive member 150, respectively, in the adjustment mechanism 100.

Further, in other embodiments, the first guide portion may also be provided at other parts than the first bracket 231, such as the third sleeve 233.

In the above embodiments, the first focusing assembly 230 may further include a second driving device, a second position sensing device. The second drive device is configured to drive rotation of the second sleeve 232 and may include a motor 2352 and an output gear 2353. The driving portion 2322 of the second sleeve 232 is a gear, and the driving portion 2322 is engaged with the output gear 2353 to receive the driving force of the motor 2352. The second position sensing device is configured to sense a rotation angle of the second sleeve 232 with respect to the first bracket 231, and may include a switching device 2372 fixed to the first bracket 231 and a fitting device 2373 fixed to the second sleeve 232. The sensing signal of the second position sensing device may be used to control operation of the motor 2352, thereby controlling the focusing operation of the first focusing assembly 230.

At least one embodiment of the present disclosure provides a head-mounted display device. The head mounted display may include any of the adjustment mechanisms described above.

The head mounted display device according to the embodiment of the present disclosure is described below taking the head mounted display device including the adjustment mechanism 100 as an example.

Fig. 15A and 15B respectively show perspective views of a portion of a head mounted display device according to at least one embodiment of the present disclosure, where fig. 15A shows a state where the head mounted display device has a minimum interpupillary distance and fig. 15B shows a state where the head mounted display device has a maximum interpupillary distance. Fig. 16 illustrates an exploded perspective view of a head mounted display device according to at least one embodiment of the present disclosure. Fig. 17 illustrates another exploded perspective view of a head mounted display device according to at least one embodiment of the present disclosure.

As shown in fig. 1B and fig. 15A, 15B, 16, and 17, the head-mounted display apparatus includes a first display device 170, a first lens 160, a first focusing assembly 130, a second display device 190, a second lens 180, a second focusing assembly 140, a housing 110, and a wearing part 120. The first display device 170, the first lens 160, the first focusing assembly 130, the second display device 190, the second lens 180, and the second focusing assembly 140 are accommodated in the housing 110. The first display device 170 and the first lens 160 are respectively mounted to the first focusing assembly 130. The second display device 190 and the second lens 180 are mounted to the second focusing assembly 140, respectively.

The first focusing assembly 130 may include a first lens mounting part 1313 for mounting the first lens 160, a first display device mounting part 1343 for mounting the first display device 170, a first telescopic adjustment part, and a first guide part 1311. The first telescopic adjustment portion is connected to at least one of the first lens mounting portion 1313 and the first display device mounting portion 1343, and is configured such that the relative position of the first display device mounting portion 1343 and the first lens mounting portion 1313 in the telescopic direction is adjustable. The first guide portion 1311 cooperates with the pupil adjustment drive member 150 to drive and guide the first focus adjustment assembly 130 to move relative to the pupil adjustment drive member 150 in a lateral direction that intersects the telescopic direction.

The second focusing assembly 140 may be symmetrically and similarly configured to the first focusing assembly 130. The second focusing assembly 140 may include a second lens mounting part for mounting the second lens 180, a second display device mounting part for mounting the second display device 190, a second telescopic adjustment part, and a fourth guide part 1411. The second telescopic adjustment part is connected with at least one of the second lens installation part and the second display device installation part, and is configured to enable the relative position of the second display device installation part and the second lens installation part in the telescopic direction to be adjustable. The fourth guiding portion 1411 cooperates with the pupil adjustment driving member 150 to drive and guide the second focusing assembly 140 to move in the lateral direction relative to the pupil adjustment driving member 150.

The pupil drive member 150 comprises an adjustment screw comprising a first helical portion 151 extending in the transverse direction and a fifth helical portion 153 extending in the transverse direction. The first guide portion 1311 includes a second spiral portion 13111, and the fourth guide portion 1411 includes a sixth spiral portion. The second helical portion 13111 engages the first helical portion 151 and the sixth helical portion engages the fifth helical portion 153 such that rotation of the adjustment screw causes the first and

second focus assemblies

130, 140 to move oppositely in a lateral direction.

As shown in fig. 16 to 17, the housing 110 includes an upper housing 111 and a lower housing 112. The upper and

lower housings

111, 112 are joined together, for example by snap-fitting or adhesive or the like.

The housing 110 may be made of a non-transparent material, such as plastic. The housing 110 may have a first opening 113 and a second opening 114 configured to allow light emitted from the first display device 170 guided by the first lens 160 and light emitted from the second display device 190 guided by the second lens 180 to pass therethrough, respectively. The first and

second openings

113 and 114 may be respectively closed with a transparent material to prevent dust from entering the inside of the housing 110. In the present embodiment, the first opening 113 and the second opening 114 are sized such that the light exit portion of the first lens 160 and the light exit portion of the second lens 180 are exposed, respectively. Since the first lens 160 moves laterally with the lateral movement of the first focus assembly 130 and the second lens 180 moves laterally with the lateral movement of the second focus assembly 140, the sizes of the first and

second openings

113 and 114 are larger than those of the light exiting portion of the first lens 160 and the light exiting portion of the second lens 180, respectively. For example, the first and

second openings

113 and 114 are sized larger than the outer diameters of the first and

second lenses

160 and 180, respectively.

The pupil adjustment drive member 150 is fixed to the lower housing 112 of the housing 110. The housing 110 includes a housing guide portion. The first focus assembly 130 further includes a fifth guide portion 1314. The second focusing assembly 140 further includes a sixth guide portion. The housing guide portion engages and guides the fifth guide portion 1314 such that the first focus assembly 130 is constrained to move in a telescopic direction relative to the housing 110. The housing guide portion also engages and guides the sixth guide portion such that the second focus assembly 140 is constrained to move in a telescopic direction relative to the housing 110.

For example, the case guide portions include first and third sub-case guide structures (not shown) and 1122 provided at the upper case 111, and second and fourth

sub-case guide structures

1121 and 1122 provided at the lower case 112, respectively. The fifth guide portion 1314 includes a first substructure 13141 and a second substructure 13142 that mate with the first and second sub-housing guide structures 1121, respectively. The sixth guide portion includes a third sub-structure 14141 and a fourth sub-structure (not shown) that mate with the third and fourth sub-housing guide structures 1122, respectively.

The wearable portion 120 is coupled to the housing 110, which is configured to surround at least a portion of the head of the user. The wearing portion 120 may include a lateral portion 121. The transverse portion 121 may have the form of a strap, both ends of which are connected to the housing 110. The transverse portion 121 may surround the head of the user to extend from one side temple area through the user occipital area to the other side temple area. Optionally, the wearing portion 120 may further include a longitudinal portion 122. The longitudinal portion 122 has one end coupled to the center of the transverse portion 121 and the other end connected to the upper case 111 of the case 110 to extend from the occipital region of the user to the forehead of the user. The transverse portion 121 and the longitudinal portion 122 may be configured to be adjustable in length for ease of wearing by a user.

In addition, the head-mounted display device may further include a controller. The controller may be the controller 155 of the adjustment mechanism described above. The controller 155 may be wired or wirelessly connected to the second driving means 135 of the first focusing assembly 130, the driving means of the second focusing assembly 140, the first display device 170, and the second display device 190, respectively, to control them.

Further, the head mounted display device may further include one or more of: a communication module, an interface (e.g., a Universal Serial Bus (USB) interface), an input device, a power management module, a user identification module, a memory, an audio module, a sensor module, a haptic module, a camera module, and a bus.

The scope of the present disclosure is not defined by the embodiments described above but is defined by the appended claims and equivalents thereof.

Claims

1. An adjustment mechanism comprising:

a focusing assembly; and

a pupil-adjusting drive member, wherein,

the focusing assembly includes:

a lens mounting part for mounting the lens,

a display device mounting portion for mounting a display device,

a telescopic adjustment part connected to at least one of the lens mounting part and the display device mounting part, and configured to allow a relative position of the display device mounting part and the lens mounting part in a telescopic direction to be adjustable;

a first guide portion cooperating with the pupil adjustment drive member to drive and guide the focus adjustment assembly to move relative to the pupil adjustment drive member in a transverse direction intersecting the telescoping direction, the telescoping adjustment portion including a first sleeve configured to translate relative to the support in the telescoping direction, the first sleeve being coaxial with the second sleeve and having an axial direction that is the telescoping direction, a second sleeve mounted to the support, a third sleeve fixed to the support, the third sleeve being coaxial with the first and second sleeves, the second sleeve being journaled to the third sleeve and configured to rotate relative to the third sleeve about its axial direction, stop members being provided on the second and third sleeves, respectively, including a plurality of arced strips provided on the second sleeve and an annular flange provided at a first end of the third sleeve remote from the support, the plurality of arced strips projecting in a radial direction of the second sleeve and extending in a circumferential direction, an outer diameter of each of the plurality of arced strips being smaller than an inner diameter of the annular flange of the second sleeve, the plurality of arced strips and the annular flange being configured to move relative to the second sleeve in the telescoping direction,

the bracket is provided with a second guide portion which is a groove extending in the telescopic direction and a fifth guide portion which includes a first substructure and a second substructure, the first substructure and the second substructure extending in the transverse direction parallel to each other and being located on opposite sides of the bracket to each other, the first sleeve includes a third guide portion including a protrusion protruding vertically downward.

2. The adjustment mechanism of claim 1,

the pupil adjustment drive member comprises an adjustment screw comprising a first helical portion extending in the transverse direction;

the first guide portion includes a second helical portion that cooperates with the first helical portion such that rotation of the adjustment screw causes the focus assembly to move relative to the adjustment pupil drive member in a lateral direction that is different from the telescopic direction.

3. The adjustment mechanism of claim 2,

the adjustment screw further includes a driven portion configured to receive a driving action that drives the adjustment screw to rotate.

4. The adjustment mechanism of claim 3, further comprising

A first driving device, and is configured to be connected with the driven part and drive the adjusting screw to rotate.

5. The adjustment mechanism of claim 1,

the first sleeve is fixedly attached to or integrally formed with the lens mount,

the bracket is fixedly connected to or integrally formed with the display device mounting part and the first guide part; alternatively, the first and second electrodes may be,

the first sleeve is fixedly coupled to or integrally formed with the display device mounting part,

the bracket is fixedly coupled to or integrally formed with the lens mounting part and the first guide part.

6. The adjustment mechanism of claim 1,

the second sleeve is configured to be rotatable about an axial direction thereof, and includes a third spiral portion extending in the telescopic direction, wherein,

the first sleeve includes a fourth helical portion that cooperates with the third helical portion such that rotation of the second sleeve causes the first sleeve to move relative to the frame in the telescoping direction.

7. The adjustment mechanism of claim 1,

the first sleeve is fixedly connected to or integrally formed with the display device mounting part,

the third sleeve is fixedly connected to or integrally formed with the lens mount,

the bracket is fixedly connected to or integrally formed with the first guide portion.

8. The adjustment mechanism of claim 6,

the focusing assembly further comprises:

a second driving device configured to drive rotation of the second sleeve, wherein,

the second sleeve comprises a transmission part for transmission connection with the second driving device.

9. The adjustment mechanism of claim 8, further comprising:

a position sensing device configured to sense a position of the first sleeve relative to the bracket.

10. The adjustment mechanism of claim 9,

the position sensing device comprises a switching means and a cooperating means,

the switching device is fixed to one of the first sleeve and the bracket,

the engagement means is secured to the other of the first sleeve and the bracket,

the position sensing device is configured to cause the second driving device to stop driving the second sleeve or to drive the second sleeve to rotate in a direction opposite to a direction of a previous rotation when the first sleeve is moved to a predetermined position with respect to the cradle.

11. A head-mounted display device comprising:

a first display device;

a first lens;

a pupil adjustment drive member; and

a first focus assembly, comprising:

a first lens mounting portion for mounting the first lens,

a first display device mounting portion for mounting the first display device,

a first telescopic adjustment part connected to at least one of the first lens mounting part and the first display device mounting part, and configured to allow a relative position of the first display device mounting part and the first lens mounting part in a telescopic direction to be adjustable;

a first guide part cooperating with the pupil adjusting drive member for driving and guiding the first focusing assembly to move in a transverse direction crossing the telescopic direction relative to the pupil adjusting drive member

The first telescopic adjustment portion includes a first sleeve configured to relatively translate in the telescopic direction with respect to the support, a second sleeve mounted to the support, and a third sleeve fixed to the support, the third sleeve being coaxial with the first sleeve and the second sleeve, the second sleeve being sleeved to the third sleeve and configured to be rotatable about its axial direction with respect to the third sleeve, the second sleeve and the third sleeve being provided with a stopper member, respectively, including a plurality of arc-shaped strips provided on the second sleeve and an annular flange provided at a first end of the third sleeve remote from the first support, the plurality of arc-shaped strips protruding in a radial direction of the second sleeve and extending in a circumferential direction, the plurality of arc-shaped strips being connected to form an annular strip, an inner diameter of each of the plurality of arc-shaped strips being smaller than an outer diameter of the annular flange, the plurality of arc-shaped strips and the annular flange being configured to jointly define the second sleeve and the third sleeve to relatively move in the telescopic direction,

the bracket is provided with a second guide portion which is a groove extending in the telescopic direction and a fifth guide portion which includes a first substructure and a second substructure which extend in the transverse direction in parallel to each other and which are located on opposite sides of the bracket to each other, the first sleeve includes a third guide portion which includes a protrusion protruding vertically downward.

12. The head mounted display device of claim 11, further comprising:

a second display device;

a second lens; and

a second focusing assembly, comprising:

a second lens mounting portion for mounting the second lens,

a second display device mounting portion for mounting the second display device,

a second telescopic adjustment part connected to at least one of the second lens mounting part and the second display device mounting part, and configured to allow a relative position of the second display device mounting part and the second lens mounting part in the telescopic direction to be adjustable;

and the fourth guide part is matched with the pupil adjusting driving component to drive and guide the second focusing assembly to move in the transverse direction relative to the pupil adjusting driving component.

13. The head mounted display device of claim 12,

the pupil adjustment drive member comprises an adjustment screw comprising a first helical portion extending in the lateral direction and a fifth helical portion extending in the lateral direction,

the first guide portion includes a second spiral portion,

the fourth guide portion includes a sixth spiral portion,

the second helical portion cooperates with the first helical portion and the sixth helical portion cooperates with the fifth helical portion such that rotation of the adjustment screw causes the first and second focus assemblies to move oppositely in a lateral direction.

14. The head mounted display device of claim 11, further comprising a housing, wherein,

the pupil adjustment drive member is fixed to the housing,

the housing includes a housing guide portion that guides the housing,

the first focus assembly further comprises the fifth guide portion,

the housing guide portion engages and guides the fifth guide portion such that the first focus assembly is constrained to move in the lateral direction relative to the housing.

15. The head mounted display device of claim 14,

the first substructure and the second substructure are located on both sides of the first focusing assembly.