Pupil distance adjusting module and head-mounted display device

Abstract

The invention discloses an interpupillary distance adjusting module and head-mounted display equipment, and relates to the technical field of head-mounted display equipment, the interpupillary distance adjusting module comprises a support, a driving assembly and a sliding block, the support is provided with an opening, the driving assembly comprises a driving piece and a lead screw in transmission connection with the driving piece, and the driving piece is installed on the support; the sliding block comprises a sliding part and a limiting part which are connected with each other, the sliding part is provided with a threaded hole in threaded connection with the lead screw, and the limiting part is installed in the open hole and slides in the length direction of the open hole in a limiting mode. The interpupillary distance adjusting module has the advantages of low manufacturing cost and light module weight.

Description

Technical Field

[0001] The present application relates to the technical field of head-mounted display devices, and in particular to an interpupillary distance adjustment module and a head-mounted display device. Background Art

[0002] To enhance the user's visual experience and virtual effects, head-mounted display devices use classic algorithms from industrial systems to automatically adjust the interpupillary distance (IPD), which refers to the distance between the pupils. This method has fast response and high positioning accuracy, and has been widely used. However, this adjustment module is heavy and has a large number of parts, which limits its competitive advantages in terms of space usage and cost. Summary of the Invention

[0003] The main purpose of this application is to propose a pupil distance adjustment module and a head-mounted display device, aiming to at least improve the technical problems of the current pupil distance adjustment module being heavy and costly.

[0004] To achieve the above objectives, according to some embodiments of the present application, the present application provides an interpupillary distance adjustment module, including: A bracket, wherein the bracket is provided with an opening; A driving assembly, the driving assembly comprising a driving member and a screw rod in transmission connection with the driving member, the driving member being mounted on the bracket; The slider includes a sliding portion and a limiting portion connected to each other, the sliding portion is provided with a threaded hole threadedly connected to the screw rod, and the limiting portion is installed in the opening and limitedly slides along the length direction of the opening.

[0005] In some embodiments, the bracket includes a bottom wall and three side walls, the bottom wall is provided with the opening, the three side walls are respectively a first sub-wall, a second sub-wall and a third sub-wall, the first sub-wall and the second sub-wall are distributed at both ends of the bottom wall along the axial direction of the screw rod, and the two ends of the screw rod are respectively installed on the first sub-wall and the second sub-wall; the third sub-wall is respectively connected to the bottom wall, the first sub-wall and the second sub-wall, and the third sub-wall is arranged away from the opening.

[0006] In some embodiments, the limiting portion extends from an end of the sliding portion away from the screw rod in a direction perpendicular to the bottom wall and passes through the opening; or, The sliding portion extends in a direction away from the screw rod to form an extension portion, the extension portion extends out of the bracket, and the sliding portion and the extension portion extend in a direction perpendicular to the bottom wall to form the limiting portion, which is at least partially inserted into the opening.

[0007] In some embodiments, the number of the openings and the number of the sliders are both two, and the screw rod has a first thread segment and a second thread segment with opposite thread directions arranged along its own extension direction, wherein one slider is threadedly connected to the first thread segment, and the other slider is threadedly connected to the second thread segment, and the two openings are arranged at intervals along the extension direction of the screw rod, and the sliders are arranged one-to-one corresponding to the openings.

[0008] In some embodiments, the opening has an inner wall surface, and the inner wall surface includes two sliding surfaces arranged opposite to each other along a first direction. At least one of the sliding surfaces is provided with an elastic protrusion for abutting against the limiting portion.

[0009] In some embodiments, the elastic protrusion includes an elastic member and a spherical member connected to each other, a receiving groove is provided on the sliding surface, the elastic member is provided in the receiving groove, and the spherical member includes an extended state and a retracted state. When the spherical member is in the extended state, the spherical member at least partially extends out of the receiving groove; when the spherical member is in the retracted state, the spherical member retracts into the receiving groove, and the spherical member abuts against the limiting portion.

[0010] In some embodiments, a slide rail is provided on the inner wall surface of the opening, the slide rail is provided along the extension direction of the screw rod, and the slider is provided with a slide groove slidably connected to the slide rail; or, A slide groove is provided on the inner wall surface of the opening, and the slide groove is provided along the extending direction of the screw rod. The slider is provided with a slide rail slidably connected to the slide groove.

[0011] In some embodiments, a slide groove and a notch connected to the slide groove are provided on the inner wall surface of the opening, and the limiting portion is provided with a protrusion slidably connected to the slide groove. The protrusion is installed from the notch into the slide groove, and the protrusion is slidably connected to the slide groove.

[0012] In some embodiments, the notch is provided with a wedge block, the wedge block has a guide surface, and the guide surface is arranged away from the sliding groove.

[0013] In some embodiments, the protrusion has a guide surface, and the guide surface is used to slide with the guiding surface so that the protrusion slides into the sliding groove.

[0014] In some embodiments, a limiter is provided on the inner wall surface of the opening, and the limiter is used to limit the movement stroke of the slider.

[0015] In some embodiments, the pupil distance adjustment module further includes a limit plate and a bearing mounted on the bracket, the bearing being sleeved on the screw rod, the end of the screw rod away from the driving member having a spherical surface, and the spherical surface abuts against the limit plate. According to some embodiments of the present application, the present application also provides a head-mounted display device, which includes an optical machine and a frame, the frame is provided with lenses, and also includes the above-mentioned pupil distance adjustment module, the limiting portion is connected to the frame to adjust the position of the lenses.

[0016] In the above scheme, the interpupillary distance adjustment module includes a bracket, a drive assembly, and a slider. The bracket is provided with an opening. The drive assembly includes a driver and a screw connected to the driver, and the driver is mounted on the bracket. The slider includes a sliding portion and a stopper that are connected to each other. The sliding portion is provided with a threaded hole that is threadedly connected to the screw. The stopper is mounted in the opening and slides along the length of the opening. This invention has the advantages of low production cost and light module weight.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the pupil distance adjustment module in some embodiments of the present application; Figure 2 This is a schematic diagram of the decomposed structure of the pupil distance adjustment module in some embodiments of the present application; Figure 3 A schematic structural diagram of a viewing angle of an interpupillary distance adjustment module according to some embodiments of the present application; Figure 4 for Figure 3 A structural diagram at section AA; Figure 5 This is a schematic structural diagram of a cross section of an interpupillary distance adjustment module according to some embodiments of the present application; Figure 6 for Figure 5 Schematic diagram of the enlarged structure at A; Figure 7 This is a schematic structural diagram of another cross section of the pupil distance adjustment module in some embodiments of the present application; Figure 8 for Figure 7 Schematic diagram of the enlarged structure at B; Figure 9 This is a partial structural diagram of a bracket of an interpupillary distance adjustment module in some embodiments of the present application; Figure 10 for Figure 9 A schematic diagram of a cross-sectional structure; Figure 11 Another structural schematic diagram of a viewing angle of the interpupillary distance adjustment module in some embodiments of the present application; Figure 12 for Figure 11 A structural diagram at section BB.

[0020] Description of Figure Numbers: 100. Interpupillary distance adjustment module; 1. Bracket; 101. Bottom wall; 102. First sub-wall; 103. Second sub-wall; 104. Third sub-wall; 2. Opening; 21. Sliding surface; 3. Driving member; 4. Screw; 41. First threaded segment; 42. Second threaded segment; 43. Arc surface; 5. Slider; 51. Sliding portion; 52. Limiting portion; 521. Protrusion; 522. Mounting hole; 53. Extension portion; 6. Elastic protrusion; 61. Elastic member; 62. Spherical member; 7. Accommodating groove; 8. Notch; 9. Wedge block; 91. Bottom surface; 92. High surface; 93. Guide surface; 10. Limiting member; 11. Bearing; 12. Limiting plate; 13. Reducer; 14. Connecting ring; 15. Slide groove.

[0021] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this embodiment. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In addition, the technical solutions of the various embodiments of this application may be combined with each other, but this must be based on the fact that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions is mutually inconsistent or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this application. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0027] The descriptions of directions such as "up", "down", "front", "back", "left" and "right" in this application are based on the directions shown in the figure and are only used to explain the relative positional relationship between the components in the posture shown in the figure. If the specific posture changes, the directional indication will also change accordingly.

[0028] To enhance the user's visual experience and virtual effects, head-mounted display devices use classic algorithms from industrial systems to automatically adjust the interpupillary distance (IPD), which refers to the distance between the pupils. This method has fast response and high positioning accuracy, and has been widely used. However, this adjustment module is heavy and has a large number of parts, which limits its competitive advantages in terms of space usage and cost.

[0029] After careful research, the applicant found that the pupil distance adjustment module in the related art drives the screw to rotate through a driving member, thereby causing the slider connected to the screw thread to translate along the extension direction of the screw. The slider is connected to the frame of the head-mounted display device, so that the slider can drive the frame to move. The frame is installed with lenses, so that the horizontal distance between the two lenses can be adjusted to achieve pupil distance adjustment. In order to ensure the smooth movement of the slider, a guide rod is also provided. The extension direction of the guide rod is the same as the extension direction of the screw, which is used to position and guide the sliding of the slider. If the guide rod is not provided, inaccurate adjustment is likely to occur, and even the movement of the frame is not in the horizontal direction, which greatly reduces the adjustment accuracy.

[0030] To this end, the present invention provides a pupil distance adjustment module.

[0031] Reference Figures 1 to 3 According to some embodiments of the present application, the present application provides a pupil distance adjustment module 100, including a bracket 1, a driving assembly and a slider 5, the bracket 1 is provided with an opening 2, the driving assembly includes a driving member 3 and a screw rod 4 that is transmission-connected to the driving member 3, the driving member 3 is installed on the bracket 1, the slider 5 includes a sliding portion 51 and a limiting portion 52 that are interconnected, the sliding portion 51 is provided with a threaded hole that is threadedly connected to the screw rod 4, the limiting portion 52 is installed in the opening 2 and slides in a limited manner along the length direction of the opening 2.

[0032] It should be noted that the longitudinal direction of the opening 2 is also the direction of the central axis of the screw 4, or the extension direction of the screw 4, or the axial direction of the screw 4. The slider 5 moves on the screw 4, and the limiter 52, as part of the slider 5, moves within the opening 2. Therefore, the movement direction of the slider 5 and the limiter 52 is consistent with the longitudinal direction of the opening 2 and is also along the longitudinal direction of the screw 4. The bracket 1 is the mounting frame of the interpupillary distance adjustment module 100, which can also be called the middle frame. The drive assembly includes a drive member 3 and a screw rod 4 that is transmission-connected to the drive member 3. The drive member 3 here can be a rotary motor. One end of the screw rod 4 is transmission-connected to the drive motor. The drive member 3 can drive the screw rod 4 to rotate along its own central axis, but the screw rod 4 does not move along its own central axis. The slider 5 includes a sliding portion 51 and a limiting portion 52. The sliding portion 51 is provided with a threaded hole. The sliding portion 51 is threadedly connected to the screw rod 4 through the threaded hole. In this way, the rotation of the screw rod 4 can drive the sliding portion 51 to move along the extension direction of the screw rod 4, which is also the direction of the central axis of the screw rod 4. The limiting portion 52 is connected to the sliding portion 51 and will move with the sliding portion 51. At the same time, a slot is dug in the bracket 1 to form an opening 2. The opening 2 can be a through hole, and the limiting portion 52 can slide along the length direction of the opening 2. The opening 2 can limit and guide the limiting portion 52. It should be noted that the limiting portion 52 described in this application can slide within the opening 2. There are two situations here. The first case is that the limiting portion 52 is in contact with the inner wall of the opening 2 and is in sliding connection. Figure 3 The limiting portion 52 may be in contact with one or both inner side walls along the Y direction, and the inner side walls along the Y direction are actually the subsequent sliding surfaces 21. Of course, the limiting portion 52 may also be only in the opening 2, but not in contact with the inner side walls of the opening 2 along the Y direction, which can reduce friction.

[0033] Under the action of the driving member 3, the screw rod 4 rotates to drive the sliding portion 51, which in turn drives the connected limiting portion 52 to move. The movement of the limiting portion 52 is limited and guided by the opening 2, which improves the stability of movement and thus the accuracy of adjustment. This embodiment eliminates the need for a guide rod, reducing the number of parts and simplifying the assembly process. Furthermore, by opening the opening 2 in the bracket 1, the weight of the module can be reduced. This embodiment has the advantages of low production cost and light module weight.

[0034] Reference Figure 1 and Figure 2In some embodiments, the bracket 1 includes a bottom wall 101 and three side walls, the bottom wall 101 is provided with an opening 2, the three side walls are respectively a first sub-wall 102, a second sub-wall 103 and a third sub-wall 104, the first sub-wall 102 and the second sub-wall 103 are distributed at both ends of the bottom wall 101 along the axial direction of the screw rod 4, and the two ends of the screw rod 4 are respectively installed on the first sub-wall 102 and the second sub-wall 103; the third sub-wall 104 is respectively connected to the bottom wall 101, the first sub-wall 102 and the second sub-wall 103, and the third sub-wall 104 is arranged away from the opening 2. The three side walls are respectively connected to the bottom wall 101 and are all arranged on the outer periphery of the bottom wall 101. They can also be considered to be formed by the outer edge of the bottom wall 101 extending in the same direction, wherein two sub-walls are respectively arranged on the opposite sides of the bottom wall 101, and the two sub-walls are the first sub-wall 102 and the second sub-wall 103. The two ends of the screw rod 4 are respectively arranged on the first sub-wall 102 and the second sub-wall 103. The extension direction of the screw rod 4 is along the length direction of the opening 2. Therefore, the sliding part 51 is driven by the screw rod 4 to move, so that the limiting part 52 can be moved synchronously in the opening 2. The opposite sides of the third sub-wall 104 are respectively connected to the first sub-wall 102 and the second sub-wall 103. The third sub-wall 104 is also connected to the bottom wall 101 and is arranged at a position where the bottom wall 101 is far away from the hole 2. The sliding part 51 is arranged at a position close to the bottom wall 101 relative to the limiting part 52.

[0035] Reference Figure 1 and Figure 4 In some embodiments, the limiting portion 52 extends from the end of the sliding portion 51 away from the screw rod 4 in a direction perpendicular to the bottom wall 101 and passes through the opening 2. The central axes of the limiting portion 52 and the sliding portion 51 can be perpendicular to each other, or the limiting portion 52 and the sliding portion 51 are arranged vertically, and the two are arranged in an L-shape. The sliding portion 51 is arranged parallel to the bottom wall 101, and the bottom wall 101 is provided with an opening 2. The limiting portion 52 passes through the opening 2 in a direction perpendicular to the bottom wall 101 and can slide in the opening 2 and along the length direction of the opening 2. The opening 2 can play a role of limiting and guiding. The frame is fixed to the end of the limiting portion 52 away from the sliding portion 51. The limiting portion 52 can both achieve limiting and fix the frame.

[0036] In the previous embodiment, the sliding portion 51 does not extend out of the bracket 1. Figure 11 and Figure 12In other embodiments, the sliding portion 51 extends away from the screw rod 4 to form an extension portion 53. The extension portion 53 extends out of the bracket 1. A stopper portion 52 extends between the sliding portion 51 and the extension portion 53 in a direction perpendicular to the bottom wall 101. The stopper portion 52 is at least partially inserted into the opening 2. In this embodiment, the sliding portion 51 extends out of the bracket 1 to form the extension portion 53. The mounting hole 522 is provided in the extension portion 53. In this case, the stopper portion 52 is formed between the sliding portion 51 and the extension portion 53. Similarly, the stopper portion 52 can be at least partially inserted into the opening 2 and can slide within the opening 2.

[0037] Reference Figure 1 and Figure 3 In some embodiments, the number of openings 2 and sliders 5 are both two, and the screw rod 4 has a first thread segment 41 and a second thread segment 42 with opposite thread directions arranged along its own extension direction, wherein one slider 5 is threadedly connected to the first thread segment 41, and the other slider 5 is threadedly connected to the second thread segment 42, and the two openings 2 are arranged at intervals along the extension direction of the screw rod 4, and the sliders 5 are arranged one-to-one with the openings 2.

[0038] It should be noted that the extension direction of the screw rod 4 itself is also the direction of the central axis of the screw rod 4. Figure 3 As shown by the arrow X in the middle. Generally speaking, the number of lenses is two, so the number of sliders 5 is also two, each slider 5 is connected to a frame, and the frame is provided with lenses, and the two lenses are brought closer to or away from each other through the two sliders 5, thereby achieving the adjustment of the pupil distance. Specifically, a mounting hole 522 can be provided on the limiting portion 52 for connection to the frame. In order to achieve that the two lenses are closer to or away from each other when the screw rod 4 rotates, that is, move in opposite directions, so that the pupil distance can be adjusted. Therefore, the screw rod 4 is provided to include a first thread segment 41 and a second thread segment 42 with opposite thread directions, and the first thread segment 41 is provided with a slider 5 threadedly connected thereto, and the second thread segment 42 is provided with another slider 5 threadedly connected thereto. The two openings 2 are both provided on the bracket 1, and the arrangement direction of the two openings 2 is consistent with the extension direction of the screw rod 4, that is Figure 3 The X direction is actually the same as the sliding direction of the slider 5. Each opening 2 is correspondingly provided with a slider 5 slidably connected thereto, and the two openings 2 are spaced apart so that the two frames or lenses will not collide with each other because the two sliders 5 are too close.

[0039] Reference Figure 2In some embodiments, the pupil distance adjustment module 100 further includes a limit plate 12 and a bearing 11 mounted on the bracket 1. The bearing 11 is mounted on the screw rod 4. The end of the screw rod 4 away from the driving member 3 has a circular arc surface 43, and the circular arc surface 43 abuts against the limit plate 12. The driving assembly can also include a reducer 13, the driving member 3 is connected to the reducer 13, and the reducer 13 is connected to the screw 4. The pupil distance adjustment module 100 also includes a limit plate 12, a bearing 11 and a connecting ring 14 installed on the bracket 1. The connecting ring 14 is arranged between the driving member 3 and the reducer 13. There are two bearings 11, and the two bearings 11 are respectively arranged at both ends of the screw 4. The connecting ring 14 is also arranged on the bracket 1. The limit plate 12 is arranged at the end of the screw 4 away from the driving member 3. A circular arc surface 43 can be set on the screw 4, and a corresponding groove is set in the limit plate 12 to cooperate with the circular arc surface 43. The limit plate 12 can be a metal plate installed on the bracket 1, mainly to prevent the movement of the screw 4. The circular arc surface 43 is set to facilitate the rotation of the screw 4 and reduce the resistance encountered during the rotation process.

[0040] Reference Figure 3 In some embodiments, a limiter 10 is provided on the inner wall of the opening 2 to limit the travel of the slider 5. The limiter 10 can be provided on any of the four inner wall surfaces. When the slider 5 abuts the limiter 10, the slider 5 cannot move further. The limiter 10 can be a limiter rod or a limiter protrusion, and primarily serves to limit the travel of the slider 5.

[0041] Reference Figures 3 to 5 In some embodiments, the opening 2 has an inner wall surface, which includes two sliding surfaces 21 arranged opposite to each other along a first direction, and at least one sliding surface 21 is provided with an elastic protrusion 6 for abutting against the limiting portion 52. In a specific embodiment, the opening 2 can be a square hole, and the inner wall surface of the square hole has four sides. The first direction is the height direction of the bracket 1, which is also a direction perpendicular to the extension direction of the screw rod 4, such as Figure 3Indicated by the middle arrow Y. The two sliding surfaces 21 are arranged opposite to each other and are used for sliding connection with the limiting part 52. The other two oppositely arranged surfaces can play a limiting role. When the slider 5 encounters them, it can only stop moving. An elastic protrusion 6 is provided on at least one sliding surface 21, which means that the elastic protrusion 6 can be provided on one of the sliding surfaces 21, or on both sliding surfaces 21. The elastic protrusion 6 refers to an elastic part that can undergo elastic deformation and expand and contract. Specifically, the elastic protrusion 6 on one sliding surface 21 extends toward the other sliding surface 21, and in order not to affect the sliding of the slider 5 too much, the height of the elastic protrusion 6 exposed from the sliding surface 21 is relatively small. When the slider 5 slides to the place where the elastic protrusion 6 is located, the elastic protrusion 6 will be squeezed and elastically deformed to retract into the sliding surface 21 along the first direction. If the slider 5 stays at the position where the elastic protrusion 6 is located, the elastic protrusion 6 will press the slider 5 tightly due to the force of restoring the deformation, giving the slider 5 a pressure along the first direction. This pressure not only presses the slider 5 tightly in the first direction, but also generates a friction force perpendicular to the paper surface, reducing the possibility of the slider 5 fluctuating along the second direction and improving the adjustment accuracy. The second direction here refers to the direction perpendicular to the paper surface. The second direction is as follows: Figure 5 The reason for this design, as indicated by the middle arrow Z, is that the applicant discovered that eliminating the guide rod would cause the slider 5 to experience small fluctuations in the direction perpendicular to the paper. Therefore, the friction generated by the pressure generated by the elastic protrusion 6 creates a small resistance to the movement of the slider 5, thereby reducing the fluctuations and improving the adjustment accuracy.

[0042] Reference Figure 5 and Figure 6In some embodiments, the elastic protrusion 6 includes an interconnected elastic member 61 and a spherical member 62. A receiving groove 7 is provided on the sliding surface 21. The elastic member 61 is disposed in the receiving groove 7. The spherical member 62 has an extended state and a retracted state. When the spherical member 62 is in the extended state, the spherical member 62 at least partially extends out of the receiving groove 7. When the spherical member 62 is in the retracted state, the spherical member 62 retracts into the receiving groove 7 and abuts against the limiting portion 52. The receiving groove 7 is a recessed groove. The elastic member 61 can be any of silicone, rubber, or a spring. One side or one end of the elastic member 61 is disposed at the bottom of the receiving groove 7, and the other side or one end is connected to the spherical member 62. The spherical member 62 can be fully spherical or hemispherical, but the side facing the slider 5 is spherical. When the slider 5 is not pressing, the spherical surface of the spherical member 62 at least partially extends out of the opening 2 of the receiving groove 7. When the slider 5 slides to the position of the elastic protrusion 6, the spherical part 62 will be squeezed, causing the elastic part 61 to shrink and deform, causing the spherical part 62 to drill into the accommodating groove 7. After the slider 5 stops moving, due to the obstruction of the slider 5, the elastic part 61 cannot completely restore its deformation, and there is a pressure against the slider 5. Specifically. The moving direction of the spherical part 62 is perpendicular to the moving direction of the slider 5. The slider 5 moves along the extension direction of the screw 4, and the spherical part 62 moves along the first direction. The pressure applied to the slider 5 is also along the first direction, which will generate friction on the slider 5 and reduce the fluctuation of the slider 5. The spherical part 62 is provided to squeeze the slider 5 through the spherical surface to facilitate the retraction of the elastic protrusion 6 during the movement of the slider 5 and reduce the sliding resistance.

[0043] In some embodiments, a slide rail is provided on the inner wall surface of the opening 2, the slide rail is provided along the extension direction of the screw rod 4, and the slider 5 is provided with a slide groove 15 that is slidably connected to the slide rail; or, a slide groove 15 is provided on the inner wall surface of the opening 2, the slide groove 15 is provided along the extension direction of the screw rod 4, and the slider 5 is provided with a slide rail that is slidably connected to the slide groove 15. In order to facilitate sliding, a form of sliding cooperation between the slide rail and the slide groove 15 can also be provided, specifically, the slide rail can be provided on the inner wall surface of the opening 2, and the slide groove 15 can be provided on the limiting portion 52 of the slider 5; or the slide groove 15 can be provided on the inner wall surface of the opening 2, and the slide rail can be provided on the limiting portion 52 of the slider 5. Of course, the cooperation of the slide groove 15 and the slide rail in this embodiment can not only facilitate sliding, but also provide a limit perpendicular to the paper direction through the cooperation between the slide rail and the slide groove 15, that is, a limit along the second direction, thereby reducing the fluctuation of the slider 5 during sliding and improving the adjustment accuracy.

[0044] Reference Figure 7 and Figure 8In some embodiments, a chute 15 and a notch 8 communicating with the chute 15 are provided on the inner wall surface of the opening 2. The limiting portion 52 is provided with a protrusion 521 that is slidably connected to the chute 15. The protrusion 521 is installed from the notch 8 into the chute 15, and the protrusion 521 is slidably connected to the chute 15. In this embodiment, a notch 8 is provided on the chute 15, and a protrusion 521 is provided on the limiting portion 52. When the slider 5 is installed, the protrusion 521 can be slid from the notch 8 into the chute 15. The protrusion 521 is configured to be able to slide within the chute 15. The sliding fit between the protrusion 521 and the chute 15 enables the limiting portion 52 to slide within the opening 2. In this configuration, the protrusion 521 slides from the notch 8 into the chute 15 to achieve sliding fit with the chute 15, which can reduce the difficulty of assembly.

[0045] In a specific embodiment, the height of the notch 8 is smaller than the height of the chute 15. Such a height refers to the height in the first direction. Figure 10 , the height of the notch 8 is represented by h, and the height of the chute 15 is represented by H, then H>h. Thus, after the protrusion 521 slides into the chute 15, even if it slides to the corresponding notch 8, the height of the sidewall of the chute 15 at the notch 8 is still Hh, which can reduce the risk of the protrusion 521 sliding off the notch 8. It should be noted that this embodiment can be used in conjunction with the provision of elastic protrusions 6 on the sliding surface 21.

[0046] Reference Figure 8 and Figure 9 In some embodiments, the notch 8 is provided with a wedge-shaped block 9, which has a guide surface 93, which is disposed away from the chute 15. The wedge-shaped block 9 includes a bottom surface 91, a top surface 92, and a guide surface 93. The bottom surface 91 is connected to the notch 8, and the top surface 92 is disposed toward the chute 15. The guide surface 93 can be an inclined surface or a curved surface. The guide surface 93 is primarily intended to facilitate the sliding of the protrusion 521. Once the protrusion 521 slides in, if it attempts to escape from the notch 8, it will encounter the top surface 92 of the wedge-shaped block 9, being blocked and not easily falling off. This embodiment can guide the protrusion 521 into the chute 15 and reduce the risk of the protrusion 521 falling off from the notch 8. In some specific embodiments, the wedge block 9 is movably mounted on the bottom surface 91 of the notch 8. Specifically, a receiving space can be provided in the bottom surface 91 of the notch 8, and a spring connected to the wedge block 9 is provided in the receiving space. After the protrusion 521 slides into the notch 8, the wedge block 9 is squeezed and retracts into the receiving space of the bottom surface 91 of the notch 8. When the protrusion 521 slides into the chute 15, the wedge block 9 extends out of the receiving space under the action of the restoring force of the spring. In this way, it can not only play a avoiding role when the protrusion 521 slides in, but also can reduce the risk of the protrusion 521 sliding out of the notch 8 through the blocking effect of the wedge block 9 after the protrusion 521 enters the chute 15. It should be noted that this embodiment can be used together with the elastic protrusion 6 provided on the sliding surface 21.

[0047] Reference Figure 8 and Figure 9 In some embodiments, the protrusion 521 has a guide surface, which is used to slide with the guide surface 93 to allow the protrusion 521 to slide into the slide groove 15. In some specific embodiments, the guide surface and the guide surface 93 can both be straight inclined surfaces with the same inclination angle. Through the sliding cooperation between the two, the protrusion 521 can be easily slid into the slide groove 15, and the protrusion 521 is not likely to fall off from the notch 8 after sliding in. This embodiment can further reduce the difficulty of the protrusion 521 sliding into the slide groove 15.

[0048] According to some embodiments of the present application, the present application also provides a head-mounted display device, which includes an optical machine and a frame, wherein the frame is provided with lenses, and further includes the above-mentioned pupil distance adjustment module 100, and the limiting portion 52 is connected to the frame to adjust the position of the lenses. The optical machine is generally arranged above the frame, and the limiting portion 52 is connected to the frame. The driving member 3 drives the screw rod 4 to rotate, thereby moving the slider 5. The movement of the limiting portion 52 drives the frame to move, so that the two lenses are moved closer to or away from each other, thereby achieving the adjustment of the pupil distance of the head-mounted display device. Since the head-mounted display device includes all the technical solutions of all the embodiments of the above-mentioned pupil distance adjustment device, it has at least all the beneficial effects brought by all the above-mentioned technical solutions, which will not be described one by one here.

[0049] The above description is merely an optional embodiment of the present application and does not limit the scope of protection of the present application. Any equivalent structural transformation made by using the contents of the present application specification and drawings under the application concept of the present application, or directly / indirectly applied in other related technical fields, is included in the scope of patent protection of the present application.

Claims

1. A pupil distance adjustment module, characterized in that: include: A bracket, wherein the bracket is provided with an opening; A driving assembly, the driving assembly comprising a driving member and a screw rod in transmission connection with the driving member, the driving member being mounted on the bracket; The slider includes a sliding portion and a limiting portion connected to each other, the sliding portion is provided with a threaded hole threadedly connected to the screw rod, and the limiting portion is installed in the opening and limitedly slides along the length direction of the opening.

2. The pupil distance adjustment module according to claim 1, characterized in that: The bracket includes a bottom wall and three side walls, the bottom wall is provided with the opening, the three side walls are respectively a first sub-wall, a second sub-wall and a third sub-wall, the first sub-wall and the second sub-wall are distributed at both ends of the bottom wall along the axial direction of the screw rod, and the two ends of the screw rod are respectively installed on the first sub-wall and the second sub-wall; the third sub-wall is respectively connected to the bottom wall, the first sub-wall and the second sub-wall, and the third sub-wall is arranged away from the opening.

3. The pupil distance adjustment module according to claim 2, characterized in that: The limiting portion extends from one end of the sliding portion away from the screw rod in a direction perpendicular to the bottom wall and passes through the opening; or, The sliding portion extends in a direction away from the screw rod to form an extension portion, the extension portion extends out of the bracket, and the sliding portion and the extension portion extend in a direction perpendicular to the bottom wall to form the limiting portion, which is at least partially inserted into the opening.

4. The pupil distance adjustment module according to claim 1, characterized in that: The number of the openings and the number of the sliders are both two, the screw rod has a first thread segment and a second thread segment with opposite thread directions arranged along its own extension direction, one of the sliders is threadedly connected to the first thread segment, and the other slider is threadedly connected to the second thread segment, the two openings are arranged at intervals along the extension direction of the screw rod, and the sliders are arranged in a one-to-one correspondence with the openings.

5. The pupil distance adjustment module according to any one of claims 1 to 4, characterized in that: The opening has an inner wall surface, and the inner wall surface includes two sliding surfaces arranged opposite to each other along a first direction. At least one of the sliding surfaces is provided with an elastic protrusion for abutting against the limiting portion.

6. The pupil distance adjustment module according to claim 5, characterized in that: The elastic protrusion includes an elastic member and a spherical member connected to each other, the sliding surface is provided with a receiving groove, the elastic member is disposed in the receiving groove, and the spherical member includes an extended state and a retracted state. When the spherical member is in the extended state, the spherical member at least partially extends out of the receiving groove; When the spherical member is in the retracted state, the spherical member retracts into the accommodating groove, and the spherical member abuts against the limiting portion.

7. The pupil distance adjustment module according to any one of claims 1 to 4, characterized in that: A slide rail is provided on the inner wall surface of the opening, the slide rail is provided along the extending direction of the screw rod, and the slider is provided with a slide groove slidably connected to the slide rail; or, A slide groove is provided on the inner wall surface of the opening, and the slide groove is provided along the extending direction of the screw rod. The slider is provided with a slide rail slidably connected to the slide groove.

8. The pupil distance adjustment module according to any one of claims 1 to 4, characterized in that: A slide groove and a notch connected to the slide groove are provided on the inner wall surface of the opening, and the limiting portion is provided with a protrusion slidably connected to the slide groove. The protrusion is installed from the notch into the slide groove, and the protrusion is slidably connected to the slide groove.

9. The pupil distance adjustment module according to claim 8, characterized in that: The notch is provided with a wedge block, and the wedge block has a guide surface, and the guide surface is arranged away from the sliding groove.

10. The pupil distance adjustment module according to claim 9, characterized in that: The protrusion has a guide surface, and the guide surface is used for sliding cooperation with the guide surface so that the protrusion slides into the sliding groove.

11. The pupil distance adjustment module according to any one of claims 1 to 4, characterized in that: A limit piece is provided on the inner wall surface of the opening, and the limit piece is used to limit the moving stroke of the slider.

12. The pupil distance adjustment module according to any one of claims 1 to 4, characterized in that: The pupil distance adjustment module also includes a limit plate and a bearing installed on the bracket. The bearing is sleeved on the screw rod. The end of the screw rod away from the driving member has a spherical surface, and the spherical surface abuts against the limit plate.

13. A head-mounted display device, characterized in that: The head-mounted display device includes an optical engine and a frame, the frame is provided with lenses, and also includes a pupil distance adjustment module according to any one of claims 1 to 12, and the limiting part is connected to the frame to adjust the position of the lenses.

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