Head-mounted display device

Abstract

This invention discloses a head-mounted display device, comprising a housing, two spaced-apart lens assemblies, an interpupillary distance (IPD) adjustment mechanism, and a locking mechanism. The two lens assemblies are slidably mounted within the housing, and each lens assembly has a first limit position and a second limit position along its arrangement direction. The IPD adjustment mechanism is disposed between the two lens assemblies and is used to adjust the reciprocating sliding of the two lens assemblies between the first and second limit positions. The locking mechanism is installed between the IPD adjustment mechanism and the housing, and is used to limit the IPD adjustment mechanism from self-displacement. This invention improves the accuracy of IPD adjustment in head-mounted display devices.

Description

Technical Field

[0001] This invention relates to the field of head-mounted display technology, and particularly to a head-mounted display device. Background Technology

[0002] Head-mounted displays (HUDs) are increasingly appearing in daily life, such as AR and VR devices. To adapt these HUDs to the different interpupillary distance (IPD) requirements of various users, the distance between the two lens barrel components is adjustable. However, IPD adjustment mechanisms often cannot hold the lens barrel components at their extreme IPD positions. At these extreme positions, the IPD adjustment mechanism may experience slight self-displacement due to other structural defects or other factors. For example, if the IPD adjustment mechanism uses an elastic structure, or if other structures possess elasticity, the lens barrel component moving to its extreme position may pull or compress this elastic structure, causing a slight self-displacement and resulting in inaccurate IPD adjustment, thus affecting the user experience. Summary of the Invention

[0003] The main objective of this invention is to propose a head-mounted display device that aims to improve the accuracy of interpupillary distance adjustment in head-mounted display devices.

[0004] To achieve the above objectives, the present invention provides a head-mounted display device comprising:

[0005] case;

[0006] Two lens barrel assemblies are spaced apart and slidably mounted in the housing. The two lens barrel assemblies have a first limit position and a second limit position along the arrangement direction.

[0007] An interpupillary distance adjustment mechanism, disposed between the two lens barrel assemblies, is used to adjust the reciprocating sliding of the two lens barrel assemblies between the first extreme position and the second extreme position; and

[0008] A limiting locking mechanism is installed between the interpupillary distance adjustment mechanism and the housing, and the limiting locking mechanism is used to limit the interpupillary distance adjustment mechanism from self-offsetting.

[0009] Optionally, the head-mounted display device further includes an elastic face-fitting component, which is disposed on the inner side of the housing and has a connecting hole, through which the lens assembly is movably inserted;

[0010] At the first extreme position, the lens barrel assembly presses the inner edges of the two connecting holes that are close together; at the second extreme position, the lens barrel assembly presses the outer edges of the two connecting holes that are far apart.

[0011] Optionally, the interpupillary distance adjustment mechanism includes an adjustment gear rotatably mounted in the housing and an adjustment rack disposed on the lens barrel assembly, wherein the adjustment rack meshes with the adjustment gear for transmission.

[0012] Optionally, the limiting locking mechanism includes a first locking part fixed to the adjusting gear and a second locking part fixed to the housing. The first locking part rotates relative to the second locking part with the adjusting gear, and the first locking part and the second locking part abut against each other to limit the movement.

[0013] Optionally, the first locking part is provided with a first limiting groove and a second limiting groove at intervals on the side facing the second locking part, and a limiting ball is installed on the side facing the first locking part of the second locking part;

[0014] At the first extreme position, the limiting ball is engaged in the first limiting groove; at the second extreme position, the limiting ball is engaged in the second limiting groove.

[0015] Optionally, the two sidewalls of the first limiting groove and the second limiting groove that are close to each other have limiting guide slopes.

[0016] Optionally, a guide limiting groove is further provided between the first limiting groove and the second limiting groove, and the two ends of the guide limiting groove are respectively connected to the first limiting groove and the second limiting groove.

[0017] Optionally, the guide limiting groove is in transitional communication with the limiting guide inclined surface.

[0018] Optionally, the second locking part includes a main body fixed inside the housing, the limiting ball is installed on the side of the main body facing the first locking part, and an elastic element is provided between the main body and the limiting ball, the elastic element causing the limiting ball to have a tendency to press against the first limiting groove or the second limiting groove.

[0019] Optionally, the housing is provided with a guide rail, and a guide part is provided on the lens barrel assembly, the guide part moving on the guide rail.

[0020] The technical solution of this invention involves setting two lens barrel assemblies within a housing, with the two lens barrel assemblies slidably installed within the housing. The two lens barrel assemblies have a first limit position and a second limit position along their arrangement direction. A pupillary distance adjustment mechanism is located between the two lens barrel assemblies to adjust the reciprocating sliding of the two lens barrel assemblies between the first and second limit positions. However, in practical applications, the pupillary distance adjustment mechanism often fails to maintain the lens barrel assembly at the adjusted pupillary distance position, especially at the limit pupillary distance positions of the lens barrel assembly. For example, the pupillary distance adjustment mechanism may experience a small self-displacement due to other fitting structures or its own structural defects. If the pupillary distance adjustment mechanism uses an elastic structure, or if other structures have elastic structures, the lens barrel assembly may be pulled or squeezed when it moves to the limit position, causing a small self-displacement of the lens barrel assembly. This results in inaccurate pupillary distance adjustment and affects the user experience. Therefore, a limiting locking mechanism is provided. This limiting locking mechanism is installed between the interpupillary distance adjustment mechanism and the housing, which can limit the movement of the lens assembly, so that the lens assembly does not shift at the first extreme position, the second extreme position, and the position in between, thereby improving the accuracy of the interpupillary distance adjustment of the head-mounted display device and improving the user experience. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of an embodiment of the head-mounted display device of the present invention.

[0023] Figure 2 for Figure 1 Another structural diagram of the head-mounted display device;

[0024] Figure 3 for Figure 1 A schematic diagram of an angle structure of the limit locking mechanism in a head-mounted display device;

[0025] Figure 4 for Figure 1 Another angle structural diagram of the limit locking mechanism in a head-mounted display device;

[0026] Figure 5 for Figure 1 Another angled structural diagram of the limit locking mechanism in a head-mounted display device.

[0027] Explanation of icon numbers:

[0028]

[0029]

[0030] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] This invention proposes a head-mounted display device 100.

[0035] In embodiments of the present invention, such as Figures 1 to 5As shown, the head-mounted display device 100 includes a housing 110, two spaced-apart lens assemblies 120, an interpupillary distance adjustment mechanism 130, and a limiting locking mechanism 140. The two lens assemblies 120 are slidably installed inside the housing 110, and the two lens assemblies 120 have a first limit position and a second limit position along the arrangement direction. The interpupillary distance adjustment mechanism 130 is disposed between the two lens assemblies 120 and is used to adjust the reciprocating sliding of the two lens assemblies 120 between the first limit position and the second limit position. The limiting locking mechanism 140 is installed between the interpupillary distance adjustment mechanism 130 and the housing 110, and the limiting locking mechanism 140 is used to limit the interpupillary distance adjustment mechanism 130 from self-displacement.

[0036] Specifically, two lens barrel assemblies 120 are installed within the housing 110, and the two lens barrel assemblies 120 move towards or away from each other via the interpupillary distance adjustment mechanism 130, thereby adjusting the interpupillary distance of the head-mounted display device 100. However, the two lens barrel assemblies 120 have two extreme positions: the closest distance between them and the farthest distance between them. These two extreme positions are tentatively designated as the first extreme position and the second extreme position. In practical applications, the interpupillary distance adjustment mechanism 130 often cannot hold the lens barrel assembly 120 at the adjusted interpupillary distance position, especially at the extreme positions of the lens barrel assembly 120. For example, the interpupillary distance adjustment mechanism 130 may experience a small self-displacement due to other mating structures or its own structural defects. If the interpupillary distance adjustment mechanism 130 uses an elastic structure, or if other structures have elastic structures, the lens barrel assembly 120 may pull or compress the elastic structure when it moves to the extreme position, causing the lens barrel assembly 120 to shift slightly, resulting in inaccurate interpupillary distance adjustment and affecting the user experience.

[0037] In one embodiment, the head-mounted display device 100 further includes an elastic face-fitting member 150, which is disposed inside the housing 110. The elastic face-fitting member 150 has a connection hole 151, through which a lens assembly 120 is movably inserted. At a first extreme position, the lens assembly 120 presses against the inner edges 153 of the two connection holes 151 that are close together; at a second extreme position, the lens assembly 120 presses against the outer edges 152 of the two connection holes 151 that are far apart. Specifically, the elastic face-fitting member 150 is used to conform to the user's face, improving the fit between the head-mounted display device 100 and the user's face, thereby improving the user's wearing comfort. The elastic face-fitting member 150 is disposed inside the housing 110, that is, on the side of the housing 110 facing the user's face. The connecting hole 151 on the elastic face mask 150 allows the user's line of sight to pass through, thus revealing the lens assembly 120. Therefore, the inner periphery of the connecting hole 151 needs to be fixed to the outer periphery of the lens assembly 120 to reduce the possibility of misalignment between the connecting hole 151 and the lens assembly 120 due to movement of the lens assembly 120, which could affect the user's vision. However, the fixed connection between the inner periphery of the connecting hole 151 and the outer periphery of the lens assembly 120 means that any movement of the lens assembly 120 could compress or pull the elastic face mask 150, causing deformation. This results in the elastic face mask 150 exerting a rebound force on the lens assembly 120. The greater the movement distance, the greater the deformation of the elastic face mask 150, and consequently, the greater the rebound force exerted by the elastic face mask 150 on the lens assembly 120. When the lens barrel assembly 120 moves to the first or second extreme position, the lens barrel assembly 120 exerts maximum pressure or pull on the elastic face-fitting component 150, thus causing the lens barrel assembly 120 to rebound to its maximum force, resulting in self-displacement of the lens barrel assembly 120. This affects the accuracy of the interpupillary distance adjustment of the head-mounted display device 100 and the user's experience.

[0038] Let's assume the position where the two lens barrel assemblies 120 are closest to each other is the first extreme position, and the position where they are furthest from each other is the second extreme position. In the first extreme position, the lens barrel assembly 120 presses the inner edges 153 of the two connecting holes 151 that are close together, and the corresponding outer edges 152 of the two connecting holes 151 that are far apart are subjected to tension. In the second extreme position, the lens barrel assembly 120 presses the outer edges 152 of the two connecting holes 151 that are far apart, and the corresponding inner edges 153 of the two connecting holes 151 that are close together are subjected to tension. As a result, when the lens barrel assembly 120 is in the first extreme position or the second extreme position, the elastic face-fitting component 150 will shift due to its own elasticity, which will affect the accuracy of the interpupillary distance adjustment of the head-mounted display device 100 and affect the user's experience. Therefore, a limiting locking mechanism 140 is provided, which can limit the lens barrel assembly 120. Because it can provide sufficient force to the lens barrel assembly 120 at both the first and second extreme positions, it restricts the lens barrel assembly 120 from self-displacement during the entire interpupillary distance adjustment process, thereby improving the accuracy of the interpupillary distance adjustment of the head-mounted display device 100 and improving the user experience.

[0039] To further guide the movement of the lens barrel assembly 120, a guide structure is provided between the housing 110 and the lens barrel assembly 120. In one embodiment, referring to... Figure 1 The housing 110 contains a guide rail 111, and a guide portion 121 is provided on the corresponding lens barrel assembly 120. The guide portion 121 moves on the guide rail 111. Specifically, the guide rail 111 passes through the housing 110 and is installed inside the housing 110. The guide rail 111 extends along the direction of movement of the lens barrel assembly 120, and the guide portion 121 is provided on the corresponding lens barrel assembly 120, moving on the guide rail 111. The guide portion 121 is located on one side of the lens barrel assembly 120 and moves along the extension direction of the guide rail 111, thereby guiding the movement of the lens barrel assembly 120.

[0040] The present invention provides a technical solution by providing two lens barrel assemblies 120 within a housing 110, with the two lens barrel assemblies 120 slidably mounted within the housing 110. The two lens barrel assemblies 120 have a first limit position and a second limit position along their arrangement direction. A pupillary distance adjustment mechanism 130 is located between the two lens barrel assemblies 120 to adjust the reciprocating sliding of the two lens barrel assemblies 120 between the first and second limit positions. However, in practical applications, the pupillary distance adjustment mechanism 130 often fails to maintain the lens barrel assembly 120 at the adjusted pupillary distance position, especially at the limit pupillary distance position of the lens barrel assembly 120. For example, the pupillary distance adjustment mechanism 130 may experience a small self-displacement due to other fitting structures or its own structural defects. If the pupillary distance adjustment mechanism 130 uses an elastic structure, or if other structures have an elastic structure, the lens barrel assembly 120 may be pulled or squeezed when it moves to the limit position, causing the lens barrel assembly 120 to experience a small self-displacement, resulting in inaccurate pupillary distance adjustment and affecting the user experience. Therefore, a limiting locking mechanism 140 is provided. This limiting locking mechanism 140 is installed between the interpupillary distance adjustment mechanism 130 and the housing 110. It can limit the lens barrel assembly 120, so that the lens barrel assembly 120 does not shift at the first extreme position, the second extreme position, and the position in between. This improves the accuracy of the interpupillary distance adjustment of the head-mounted display device 100 and enhances the user experience.

[0041] Refer again Figure 1 In one embodiment, the interpupillary distance adjustment mechanism 130 includes an adjustment gear 131 rotatably mounted within the housing 110 and adjustment racks 132 disposed on the lens barrel assembly 120. The adjustment racks 132 mesh with the adjustment gear 131 for transmission. Specifically, the adjustment gear 131 is rotatably mounted within the housing 110, and the two adjustment racks 132 are disposed on the sides of the two lens barrel assemblies 120 that are close to each other. Thus, through the meshing of the adjustment racks 132 with the adjustment gear 131, the two lens barrel assemblies 120 are driven to move towards or away from each other, thereby adjusting the interpupillary distance of the head-mounted display device 100.

[0042] In other embodiments, the interpupillary distance adjustment mechanism 130 includes an elliptical cam rotatably mounted in the housing 110 and a slot provided in the lens barrel assembly 120. The slot is movably engaged with the outer periphery of the elliptical cam. The rotation of the elliptical cam drives the two slots to move towards or away from each other, thereby driving the two lens barrel assemblies 120 to move towards or away from each other.

[0043] In one embodiment, reference is made to Figures 1 to 5The limiting locking mechanism 140 includes a first locking part 141 fixed to the adjusting gear 131 and a second locking part 142 fixed to the housing 110. The first locking part 141 rotates relative to the second locking part 142 with the adjusting gear 131, and the first locking part 141 and the second locking part 142 abut against each other to limit the movement.

[0044] Specifically, the first locking part 141 is fixed to the side of the adjusting gear 131 near the user's face, and the second locking part 142 is fixed to the side of the housing 110 facing the adjusting gear 131. The first locking part 141 can rotate with the rotation of the adjusting gear 131, so that the first locking part 141 rotates relative to the second locking part 142, thereby locking or unlocking the limiting locking mechanism 140. Furthermore, the first locking part 141 and the second locking part 142 abut against each other to limit movement, thereby counteracting the rebound force of the elastic face-fitting member 150 on the lens assembly 120 and restricting the lens assembly 120 from self-displacement. In other embodiments, the first locking part 141 can also be fixed inside the housing 110, and the second locking part 142 can be fixed to the adjusting gear 131, so that the second locking part 142 rotates with the rotation of the adjusting gear 131.

[0045] Furthermore, refer to Figures 3 to 5 The first locking part 141 is provided with a first limiting groove 143 and a second limiting groove 144 at intervals on the side facing the second locking part 142, and a limiting ball 145 is installed on the side facing the first locking part 141 of the second locking part 142.

[0046] At the first extreme position, the limiting ball 145 is engaged in the first limiting groove 143; at the second extreme position, the limiting ball 145 is engaged in the second limiting groove 144.

[0047] Specifically, the first limiting groove 143 and the second limiting groove 144 are spaced apart along the circumferential direction of the first locking part 141, so that during the rotation of the adjusting gear 131, the first limiting groove 143 and the second limiting groove 144 continuously drive the limiting ball 145 to move relative to the limiting ball. At the first extreme position, the limiting ball 145 is engaged in the first limiting groove 143, so that the limiting locking mechanism 140 is limited and locked, thereby reducing the possibility of self-displacement of the two lens barrel assemblies 120 when they move away from each other to the closest distance; at the second extreme position, the limiting ball 145 is engaged in the second limiting groove 144, so that the limiting locking mechanism 140 is limited and locked, thereby reducing the possibility of self-displacement of the two lens barrel assemblies 120 when they move closer to the farthest distance. When the lens barrel assembly 120 is adjusted to between the first and second limit positions, the elastic face-fitting member 150 may also give the lens barrel assembly 120 a rebound force, but the rebound force is small. At this time, since the limiting ball 145 always presses against the first locking part 141, it can also offset the rebound force. In addition, the meshing between the adjusting gear 131 and the adjusting rack 132 generates a certain damping force, which further offsets the rebound force, thereby reducing the possibility of self-displacement when the lens barrel assembly 120 stops between the first and second limit positions.

[0048] To further reduce the possibility of self-displacement when the lens barrel assembly 120 stops between the first and second extreme positions, in one embodiment, referring to Figure 4 The two side walls of the first limiting groove 143 and the second limiting groove 144 that are close to each other have limiting guide slopes 146, which are used to guide the first limiting groove 143 or the second limiting groove 144 to disengage from the limiting ball 145. Specifically, the limiting guide slope 146 is inclined relative to the bottom wall of the first limiting groove 143 or the second limiting groove 144, and the angle between the limiting guide slope 146 and the bottom is usually greater than 90 degrees. On the one hand, when the limiting ball 145 rolls on the limiting guide slope 146, the limiting guide slope 146 can give the limiting ball 145 a circumferential force in the opposite direction due to the rebound force, which causes the adjusting gear 131 to reverse. This cancels out the rebound force and further reduces the possibility of self-displacement when the lens assembly 120 stops between the first and second limit positions. On the other hand, it reduces the difficulty of the limiting ball 145 disengaging from the first limiting groove 143 or the second limiting groove 144 and reduces the possibility of the limiting locking mechanism being locked at the first or second limit positions.

[0049] Furthermore, refer to Figure 4 and Figure 5A guide limiting groove 147 is also provided between the first limiting groove 143 and the second limiting groove 144, with both ends of the guide limiting groove 147 communicating with the first limiting groove 143 and the second limiting groove 144, respectively. Specifically, the guide limiting groove 147 is provided between the first limiting groove 143 and the second limiting groove 144, meaning that the first limiting groove 143 and the second limiting groove 144 are recessed downward relative to the plane of the first locking part 141 facing the second locking part 142. This further reduces the difficulty of the limiting ball 145 disengaging from the first limiting groove 143 or the second limiting groove 144, and also limits the relative movement of the first locking part 141 and the second locking part 142, thereby reducing the possibility of the positioning ball deviating from the first limiting groove 143 and the second limiting groove 144 and being locked outside the first or second extreme positions.

[0050] Furthermore, the guide limiting groove 147 and the limiting guide slope 146 are seamlessly connected. Specifically, the guide limiting groove 147 and the limiting guide slope 146 are seamlessly connected, that is, the bottom wall of the guide limiting groove 147 and the limiting guide slope 146 are seamlessly connected, thereby further limiting the relative movement of the first locking part 141 and the second locking part 142, thereby reducing the possibility of the positioning ball being locked due to deviating from the first limiting groove 143 and the second limiting groove 144 at the first or second extreme position.

[0051] In one embodiment, the second locking part 142 includes a main body 148, which is fixed within the housing 110. A limiting ball 145 is mounted on the side of the main body 148 facing the first locking part 141. An elastic member is provided between the main body 148 and the limiting ball 145, causing the limiting ball 145 to tend to press against the first limiting groove 143 or the second limiting groove 144. Specifically, the main body 148 is fixed within the housing 110, and the main body 148 has a hollow structure inside, allowing the limiting ball 145 to be partially rolled within the hollow structure. The elastic member is disposed within the hollow structure, with one end connected to the main body 148 and the other end connected to the limiting ball 145, causing the limiting ball 145 to tend to press against the first limiting groove 143 or the second limiting groove 144. This ensures the movement stability of the limiting locking mechanism 140. In other embodiments, the elastic element may also be disposed between the main body 148 and the housing 110.

[0052] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A head-mounted display device, characterized in that, include: case; Two lens barrel assemblies are spaced apart and slidably mounted in the housing. The two lens barrel assemblies have a first limit position and a second limit position along the arrangement direction. An interpupillary distance adjustment mechanism is disposed between the two lens barrel assemblies and is used to adjust the reciprocating sliding of the two lens barrel assemblies between the first extreme position and the second extreme position. as well as A limiting locking mechanism is installed between the interpupillary distance adjustment mechanism and the housing, and the limiting locking mechanism is used to limit the interpupillary distance adjustment mechanism from self-offsetting. The interpupillary distance adjustment mechanism includes an adjustment gear rotatably mounted inside the housing and an adjustment rack disposed on the lens barrel assembly, wherein the adjustment rack meshes with the adjustment gear for transmission. The limiting locking mechanism includes a first locking part fixed to the adjusting gear and a second locking part fixed to the housing. The first locking part rotates relative to the second locking part with the adjusting gear, and the first locking part and the second locking part abut against each other to limit the movement. The first locking part is provided with a first limiting groove and a second limiting groove at intervals on the side facing the second locking part, and the second locking part is installed with limiting balls on the side facing the first locking part; At the first extreme position, the limiting ball is engaged in the first limiting groove; at the second extreme position, the limiting ball is engaged in the second limiting groove.

2. The head-mounted display device as described in claim 1, characterized in that, The head-mounted display device also includes an elastic face-fitting component, which is disposed on the inner side of the housing and has a connection hole, through which the lens assembly is movably inserted. At the first extreme position, the lens barrel assembly presses the inner edges of the two connecting holes that are close together; at the second extreme position, the lens barrel assembly presses the outer edges of the two connecting holes that are far apart.

3. The head-mounted display device as described in claim 1, characterized in that, Both sidewalls of the first limiting groove and the second limiting groove that are close to each other have limiting guide slopes.

4. The head-mounted display device as described in claim 3, characterized in that, A guide limiting groove is also provided between the first limiting groove and the second limiting groove, and the two ends of the guide limiting groove are respectively connected to the first limiting groove and the second limiting groove.

5. The head-mounted display device as described in claim 4, characterized in that, The guide limiting groove is connected to the limiting guide inclined surface.

6. The head-mounted display device as claimed in claim 1, characterized in that, The second locking part includes a main body fixed inside the housing. The limiting ball is installed on the side of the main body facing the first locking part, and an elastic element is provided between the main body and the limiting ball. The elastic element causes the limiting ball to have a tendency to press against the first limiting groove or the second limiting groove.

7. The head-mounted display device according to any one of claims 1 to 6, characterized in that, The housing is provided with a guide rail, and a guide part is provided on the lens barrel assembly, and the guide part moves on the guide rail.

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