Telescopic mechanism and head-mounted display device

Abstract

The present invention discloses a telescopic mechanism and a head-mounted display device. The telescopic mechanism includes a carrier, a strap, an elastic body, and a resistance-generating structure. The strap is slidably mounted on the carrier; the elastic body is connected to the carrier and the strap and can be stretched by the strap when the strap slides; the resistance-generating structure is used to apply a damping force to the stretching motion of the elastic body, and the magnitude of the damping force generated can be adjusted. The technical solution of the present invention can improve the user experience of the head-mounted display device.

Description

Technical Field

[0001] The present invention relates to the technical field of head-mounted display devices, and in particular to a telescopic mechanism and a head-mounted display device using the telescopic mechanism. Background Art

[0002] With the advancement of technology and the development of consumer electronics, head-mounted display devices such as AR and VR products have entered a period of rapid development. To improve wearing stability, head-mounted display devices currently on the market are typically secured with straps. Furthermore, to adapt the head-mounted display device to different head sizes, the strap is attached to the head-mounted display device by connecting it to an elastic body. This allows the strap and the elastic body to combine to form a retractable mechanism, allowing the head-mounted display device to be adjusted to the appropriate wearing size by pulling the strap.

[0003] However, while the telescopic mechanism formed by the aforementioned strap and elastic body can accommodate different head sizes, as the range of head sizes increases, the elastic mechanism gradually stretches, which in turn causes the reverse contraction force to continue to increase. When this contraction force is excessive and exceeds the user's comfortable tolerance, the wearable device becomes too tight, affecting the user's experience. Summary of the Invention

[0004] The main purpose of the present invention is to provide a telescopic mechanism, aiming to improve the user experience of a head-mounted display device.

[0005] To achieve the above-mentioned purpose, the telescopic mechanism proposed by the present invention includes:

[0006] carrier;

[0007] a strap member slidably disposed on the carrier;

[0008] an elastic body connected to the carrier and the strap member, and capable of being stretched by the strap member when the strap member slides; and

[0009] The resistance generating structure is used to apply a damping force to the stretching movement of the elastic body, and the magnitude of the damping force generated by the resistance generating structure can be adjusted.

[0010] Optionally, the resistance generating structure includes:

[0011] a moving member, the moving member being movably provided on the carrier and being driven to move by the elastic body when the elastic body is stretched; and

[0012] An elastic member is provided between the supporting body and the moving member. When the moving member is driven by the elastic member, the elastic member can be elastically deformed to apply a damping force to the stretching movement of the elastic member.

[0013] Optionally, the movable member is rotatably provided on the carrier, and can be driven to rotate by the elastic body when the elastic body is stretched.

[0014] Optionally, the moving member includes:

[0015] a gear portion, the gear portion being rotatably disposed on the carrier, and at least one protruding tooth of the gear portion being in contact with the elastic body; and

[0016] a claw portion, one end of which is rotatably disposed on the carrier, and the other end of which abuts between two adjacent protruding teeth of the gear portion;

[0017] The elastic member is provided between the claw portion and the supporting body, and when the elastic body is stretched and the claw portion is driven to rotate via the gear portion, the elastic member can be driven by the claw portion to undergo elastic deformation.

[0018] Optionally, the elastic member includes:

[0019] a first elastic arm connected to an end of the claw portion away from the gear portion; and

[0020] The second elastic arm has one end provided on the carrier and the other end connected to the end of the first elastic arm away from the claw portion, and the second elastic arm is provided at an angle thereto.

[0021] Optionally, the resistance generating structure further includes an adjusting member, which is movably provided on the carrier and can be fixed relative to the carrier;

[0022] When the adjusting member moves relative to the supporting body, the adjusting member can also abut against and drive the second elastic arm to adjust the size of the angle formed by the second elastic arm and the first elastic arm.

[0023] Optionally, the adjusting member includes:

[0024] an adjusting shaft, the adjusting shaft being rotatably disposed on the carrier and being positionally fixed relative to the carrier during rotation; and

[0025] An abutment block, one end of which is rotatably connected to the adjustment shaft, and the other end of which abuts against the second elastic arm. When the abutment block is driven by the adjustment shaft, it can abut and drive the second elastic arm.

[0026] Optionally, the side surface of the adjusting shaft is provided with one of a limiting rib and a limiting groove, and the carrier is provided with the other of the limiting rib and the limiting groove; there are a plurality of limiting grooves, and the plurality of limiting grooves are sequentially distributed around the rotation axis of the adjusting shaft; the limiting rib can be embedded in any of the limiting grooves to limit and fix the adjusting shaft relative to the carrier;

[0027] And / or, the adjusting member further includes a handle portion, and the handle portion is sleeved on an end of the adjusting shaft away from the abutting block.

[0028] Optionally, the gear portion includes a gear body, an outer convex tooth, and an inner convex tooth, the gear body being an annular structure and rotatably disposed on the carrier; the outer convex tooth is disposed on the outer side wall of the gear body and can be abutted and driven by the elastic body when the elastic body is stretched; the inner convex tooth is disposed on the inner side wall of the gear body, the claw portion and the elastic member are both located on the inner side of the gear body, and the claw portion can abut between two adjacent inner convex teeth;

[0029] And / or, the resistance generating structure further includes a gear damper, and the gear damper is used to provide a damping force when the elastic body driven by the stretched gear portion rotates.

[0030] The present invention also provides a head-mounted display device, comprising the above-mentioned telescopic mechanism.

[0031] When used in a head-mounted display device, the telescopic mechanism of the present invention utilizes a sliding strap member and an elastic member disposed between the strap member and the carrier. Therefore, by pulling the strap member relative to the carrier, different sizes of wearing spaces can be enclosed, allowing the head-mounted display device to be worn by users with different head sizes.

[0032] Furthermore, the telescopic mechanism of this embodiment also includes a resistance-generating structure that applies a damping force to the stretching motion of the elastic body. In other words, the damping force generated by the resistance-generating structure counteracts and attenuates the contraction force of the elastic body. Furthermore, the magnitude of the damping force generated by the resistance-generating structure is adjustable. When the elastic body is stretched to different distances by the strap, the magnitude of the damping force generated by the resistance-generating structure can be adjusted accordingly. The damping force counteracts the contraction force released by the elastic body, thereby attenuating the contraction force released by the elastic body within a certain range. Therefore, by adjusting the damping force generated by the resistance-generating structure, the contraction force ultimately released by the telescopic mechanism is indirectly adjusted. Furthermore, during subsequent use of the telescopic mechanism, the elastic body is prevented from continuously stretching as the size of the user's head increases, causing the contraction force released by the telescopic mechanism to be excessive and beyond the user's comfortable tolerance. This allows different users to wear the head-mounted device comfortably without feeling overly tight, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0034] Figure 1 This is a structural diagram of an embodiment of the telescopic mechanism of the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the telescopic mechanism from another perspective;

[0036] Figure 3 for Figure 1 A schematic diagram of a partially exploded structure of the telescopic mechanism from one perspective;

[0037] Figure 4 for Figure 3 Another perspective diagram of the local explosion structure;

[0038] Figure 5 for Figure 1 A schematic diagram of a partial structure of the telescopic mechanism;

[0039] Figure 6 for Figure 5 Another partial structural diagram of the telescopic mechanism;

[0040] Figure 7 for Figure 6 Another perspective diagram of the local structure;

[0041] Figure 8 for Figure 6 Schematic diagram of the exploded structure of the local structure;

[0042] Figure 9 for Figure 1 A cross-sectional diagram of the telescopic mechanism.

[0043] Description of Figure Numbers:

[0044]

[0045]

[0046] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. 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.

[0049] In the present invention, 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. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory 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 required by the present invention.

[0051] Please refer to Figures 1 to 5 The present invention provides a telescopic mechanism 100. In one embodiment of the present invention, the telescopic mechanism 100 includes a carrier 10, a strap member 30, an elastic member 50, and a resistance generating structure 70. The strap member 30 is slidably mounted on the carrier 10; the elastic member 50 is connected to the carrier 10 and the strap member 30 and can be stretched by the strap member 30 when the strap member 30 slides; the resistance generating structure 70 is used to apply a damping force to the stretching movement of the elastic member 50, and the magnitude of the damping force generated by the resistance generating structure 70 can be adjusted.

[0052] The telescopic frame described above can be applied to a head-mounted display device, which can specifically be an AR device or a VR device. The head-mounted display device can also include a display host for displaying augmented or virtual images. In this case, the carrier 10 of the telescopic mechanism 100 can directly serve as a rear housing disposed opposite the display host, and the telescopic mechanism 100 can each include two straps 30, elastic members 50, and resistance-generating structures 70. Specifically, one end of each strap 30 can be connected to opposite ends of the display host, while the other end can be slidably disposed on opposite ends of the carrier 10. Each elastic member 50 and adjustment structure is provided with a corresponding strap 30. In this way, the display host, the two straps 30, and the carrier 10 enclose a wearing space for the user. Of course, the carrier 10 of the telescopic mechanism 100 can also be a component disposed on the rear housing. In this case, the number of each carrier 10, strap 30, elastic member 50, and resistance-generating structure 70 can be two. That is, the two carriers 10 are respectively arranged in the rear shell, one end of the two strap parts 30 is respectively connected to the opposite ends of the display host, and the other end passes through the rear shell and is slidably connected to the two carriers 10 located in the rear shell, so that a wearing space for the user is formed by the two display hosts, the two strap parts 30 and the rear shell. Therefore, the carrier 10 is used to provide a mounting position so that the strap part 30, the elastic body 50 and the resistance generating structure 70 can be assembled into an integral structure. Among them, the carrier 10 can be formed by a single plate, or a combination of multiple plates, or a combination of multiple plates and columns, etc. The specific structure and shape of the carrier 10 are not limited in this application. The strap part 30 can be used to connect the display host and the rear shell of the head-mounted display device so as to enclose a wearing space for the user. The strap member 30 is slidably disposed on the carrier 10. The carrier 10 may be provided with a sliding groove or a sliding channel, and the strap member 30 or a sliding block provided on the strap member 30 is slidably embedded in the sliding groove or the sliding channel. The elastic body 50 can be used to provide elastic force so that after the strap member 30 is stretched and adjusted, it can drive the strap member 30 to contract, so that the head-mounted display device is more stably worn on the human body. The elastic body 50 can be a spring, which has the advantage of good elasticity, thereby facilitating the elastic body 50 to exert a relatively stable elastic force to ensure the stability of the head-mounted display device. Moreover, springs can also be purchased more easily on the market, thereby improving the availability of the elastic body 50. Of course, it should be noted that the present application is not limited to this. In other embodiments, the elastic body 50 can also be a rubber band or an elastic silicone strip.Furthermore, one end of the elastic member 50 is fixed to the strap member 30, and the other end is fixed to the carrier 10. The elastic member 50 can be fixed by hooking or welding. For example, if the elastic member 50 is a spring, one end of the spring can be hooked to a fixing post on the strap member 30, and the other end can be hooked to a fixing post on the carrier 10. Of course, the opposite ends of the spring can also be directly welded to the fixing post on the strap member 30 and the carrier 10, respectively. The resistance generating structure 70 can be used to generate a damping force to hinder the tensile movement of the elastic member 50. In effect, this damping force counteracts and attenuates the elastic force released by the elastic member 50. Therefore, by adjusting the damping force generated by the resistance generating structure 70, after counteracting and attenuating the tensioning force released by the elastic member 50, the ultimate elastic force released by the telescopic mechanism 100 can be adjusted. Furthermore, when the strap member 30 is stretched to different distances, by correspondingly adjusting the magnitude of the damping force generated by the resistance generating structure 70, the telescopic force ultimately released by the telescopic mechanism 100 can be within a preset range (i.e., the area that the user can bear more comfortably).

[0053] When the telescopic mechanism 100 of the present invention is used in a head-mounted display device, the strap 30 can slide, and an elastic member 50 is provided between the strap 30 and the carrier 10. Therefore, by pulling the strap 30 relative to the carrier 10, different sizes of wearing spaces can be enclosed, allowing the head-mounted display device to be worn by users with different head sizes.

[0054] Moreover, the telescopic mechanism 100 in this embodiment also includes a resistance generating structure 70, which can be used to apply a damping force to the stretching movement of the elastic body 50. In other words, the damping force generated by the resistance generating structure 70 can be used to counteract and attenuate the contraction force of the elastic body 50. At the same time, the resistance generating structure 70 can adjust the magnitude of the damping force it generates, so that when the elastic body 50 is stretched to different distances by the strap 30, the magnitude of the damping force generated by the resistance generating structure 70 can be adjusted accordingly, so that the corresponding damping force and the contraction force released by the elastic body 50 are counteracted, and the contraction force released by the elastic body 50 is attenuated within a certain range. Therefore, by adjusting the magnitude of the damping force generated by the resistance generating structure 70, the contraction force ultimately released by the telescopic mechanism 100 can be indirectly adjusted. Furthermore, in the subsequent actual use of the telescopic mechanism 100, it is avoided that the elastic body 50 continues to stretch as the size range of the user's head continues to increase, causing the contraction force released by the telescopic mechanism 100 to be too large and beyond the user's comfortable tolerance range, so that different users can wear it more comfortably without causing it to be too tight, thereby improving the user's experience of the head-mounted device.

[0055] Please refer to Figure 3 and Figure 5 In one embodiment of the present invention, the resistance generating structure 70 includes a moving member 71 and an elastic member 73. The moving member 71 is movably provided on the carrier 10 and can be driven to move by the elastic member 50 when the elastic member 50 is stretched; the elastic member 73 is provided between the carrier 10 and the moving member 71. When the moving member 71 is driven by the elastic member 50, the elastic member 73 can undergo elastic deformation to apply a damping force to the stretching movement of the elastic member 50.

[0056] In this embodiment, because the movable member 71 is movable, it can follow the elastic member 50's movement when it is stretched. During the movement of the movable member 71, the elastic member 73 deforms accordingly with the distance the movable member 71 moves, thereby generating a corresponding damping force. For example, when the strap 30 is stretched longer, the elastic member 50 is stretched more, generating a greater tightening force. The movable member 71 is also driven to move more by the elastic member 50, and the elastic member 73 is correspondingly deformed and generates a greater damping force. This ensures that after the contraction force of the elastic member 50 and the elastic member 50 are attenuated, the final contraction force of the telescopic mechanism 100 is stabilized within a range of forces that the user can comfortably withstand. Thus, the resistance-generating mechanism can automatically generate a corresponding damping force according to the length of the stretched strap 30. This improves the automation level of the telescopic mechanism 100, thereby further enhancing its convenience and improving the user experience. Moreover, the resistance generating structure 70 at this time still adopts a purely mechanical mechanism and does not involve circuits and air circuits, etc., which is conducive to improving its convenience of use. Of course, it should be noted that the present application is not limited to this. In other embodiments, the resistance generating structure 70 can also include a pneumatic cylinder and a piston rod slidably inserted in the pneumatic cylinder, and the end of the piston rod away from the pneumatic cylinder can abut against the side surface of the elastic body 50 and can be abutted and driven to slide by the stretched elastic body 50. In this way, by controlling the amount of gas input in the pneumatic cylinder, the piston rod can be subjected to different damping forces when abutted and driven by the elastic body 50, and the resistance value can be transmitted to the elastic body 50.

[0057] Please refer to Figures 3 to 6 In one embodiment of the present invention, the moving member 71 is rotatably disposed on the carrier 10 and can be driven to rotate by the elastic body 50 when the elastic body 50 is stretched.

[0058] In this embodiment, after the elastic body 50 is stretched by the strap member 30, its linear motion can be converted into the rotational motion of the moving member 71. When the moving member 71 performs rotational motion, its motion trajectory is circular, which makes the rotational stroke of the moving member 71 relatively small. In this way, there is no need to set a large avoidance space for the moving member 71 on the carrier 10, thereby improving the compactness of the structural distribution of the telescopic mechanism 100, so as to improve the convenience of subsequent placement on the head-mounted display device. Of course, it should be noted that the present application is not limited to this. In other embodiments, the moving member 71 can also be slidably arranged on the carrier 10 along the sliding direction of the strap member 30, and can be driven to slide by the elastic body 50 when the elastomer 50 is stretched.

[0059] Further, please refer to Figure 5 and Figure 6The movable member 71 includes a gear portion 711 and a claw portion 717. The gear portion 711 is rotatably provided on the carrier 10, and at least one convex tooth of the gear portion 711 abuts against the elastic body 50; one end of the claw portion 717 is rotatably provided on the carrier 10, and the other end abuts between two adjacent convex teeth of the gear portion 711; the elastic member 73 is provided between the claw portion 717 and the carrier 10, and when the elastic body 50 is stretched and the claw portion 717 is driven to rotate through the gear portion 711, the elastic member 73 can be driven by the claw portion 717 to undergo elastic deformation.

[0060] In this embodiment, the movable member 71 is configured as a gear portion 711 and a claw portion 717. The gear portion 711 facilitates abutment and transmission with the elastic member 50. Specifically, when the elastic member 50 is stretched, the gear portion 711 can be effectively driven to rotate in a first direction. Furthermore, when the head-mounted display device is removed and the elastic member 50 is retracted and reset, the gear portion 711 can also be effectively driven to rotate in a second direction opposite to the first direction. The claw portion 717 provides a mounting for the elastic member 73. The claw portion 717 is relatively small and has a simple structure, making it easier to position the elastic member 73 between the claw portion 717 and the bearing portion. Furthermore, since the abutment between the claw portion 717 and the gear portion 711 is rigid, the gear portion 711 is effectively restrained, thereby enhancing the operational stability of the telescopic mechanism 100. In addition, it should be noted that the present application is not limited to this. The movable member 71 may also include only the gear portion 711. In this case, the elastic member 73 can be directly connected to the gear portion 711 and the carrier 10. When the gear portion 711 is abutted and driven to rotate by the stretched elastic body 50, the elastic member 73 can be driven to undergo elastic deformation to generate a damping force.

[0061] Further, please refer to Figure 5 and Figure 6 The elastic member 73 includes a first elastic arm 731 and a second elastic arm 733. The first elastic arm 731 is connected to the end of the claw portion 717 away from the gear portion 711; one end of the second elastic arm 733 is provided on the carrier 10, and the other end is connected to the end of the first elastic arm 731 away from the claw portion 717, and the second elastic arm 733 and the second elastic arm 733 are arranged at an angle.

[0062] In this embodiment, the elastic member 73 is configured as a first elastic arm 731 and a second elastic arm 733 in an angled configuration. This allows the elastic member 73 to have greater elasticity. This allows the first elastic arm 731 to more easily deform when the stretched elastic body 50 drives the claw to rotate via the gear portion 711, thereby stably generating a corresponding damping force. Furthermore, the angled configuration of the elastic member 73 also reduces its size, thereby reducing the overall volume of the telescopic mechanism 100. To further enhance the compactness of the arrangement of the elastic member 73 and the claw portion 717, the claw portion 717 can be connected to the inner side of the first elastic arm 731. The claw portion 717 and the first elastic arm 731 can be secured together by screws, adhesive bonding, or other methods. Connecting the claw portion 717 and the first elastic arm 731 as a single unit also allows the elastic member 73 to be installed simultaneously with the claw portion 717. In addition, it should be noted that the present application is not limited to this. In other embodiments, the elastic member 73 can also be a linear segment, or a torsion spring, etc., which can generate damping force by corresponding elastic deformation when the elastic body 50 is stretched by the strap member 30.

[0063] Please refer to Figures 6 to 8 In one embodiment of the present invention, the resistance generating structure 70 further includes an adjusting member 75, which is movably disposed on the carrier 10 and can be fixed relative to the carrier 10; when the adjusting member 75 moves relative to the carrier 10, the adjusting member 75 can also abut and drive the second elastic arm 733 to adjust the size of the angle formed by the second elastic arm 733 and the first elastic arm 731.

[0064] In this embodiment, the angle formed by the second elastic arm 733 and the first elastic arm 731 of the elastic member 73 can be adjusted by the adjusting member 75, thereby adjusting the initial elastic force of the elastic member 73. This in turn generates different initial damping forces, providing varying degrees of attenuation against the tensioning force released by the elastic body 50 after being stretched. In other words, the adjusting member 75 allows for preliminary adjustment of the damping force generated by the resistance generating structure 70 between various large gear positions. Furthermore, the damping force generated by the elastic member 73, which elastically deforms after the elastic body 50 is stretched to different lengths, enables automatic fine-tuning between the various small gear positions within each large gear position. This increases the versatility of the resistance generating structure 70 in adjusting the damping force it generates, and indirectly, the versatility of the adjustment of the tensioning force ultimately released by the telescopic mechanism 100, thereby improving the practicality of the adjustment process and further enhancing the user experience. When the gear portion 711 is rotated by the stretched elastic body 50, if the gear portion 711 drives the claw portion 717 to rotate toward the second elastic arm 733, then when the adjustment member 75 moves relative to the carrier 10, the adjustment member 75 can abut against and drive the second elastic arm 733 toward the first elastic arm 731, thereby reducing the angle between the second elastic arm 733 and the first elastic arm 731, thereby increasing the initial damping force generated by the elastic member 73. When the gear portion 711 is rotated by the stretched elastic body 50, if the gear portion 711 drives the claw portion 717 to rotate away from the second elastic arm 733, then when the adjustment member 75 moves relative to the carrier 10, the adjustment member 75 can abut against and drive the second elastic arm 733 away from the first elastic arm 731, thereby increasing the angle between the second elastic arm 733 and the first elastic arm 731, thereby increasing the initial damping force generated by the elastic member 73.

[0065] Further, please refer to Figures 6 to 8 The adjusting member 75 includes an adjusting shaft 751 and an abutment block 755. The adjusting shaft 751 is rotatably provided on the carrier 10 and can be fixed relative to the carrier 10 during rotation. One end of the abutment block 755 is rotatably connected to the adjusting member, and the other end abuts against the second elastic arm 733. When the abutment block 755 is driven by the adjusting shaft 751, it can abut and drive the second elastic arm 733.

[0066] In this embodiment, the adjusting member 75 can be rotatably installed by adjusting the shaft 751 so that its motion trajectory can be circular, thereby making the rotation stroke of the adjusting member 75 relatively small. In this case, there is no need to set a large avoidance space for the adjusting member 75 on the carrier 10, which is conducive to further improving the compactness of the distribution of each structure. The setting of the abutment block 755 can be used to provide an abutment position for abutting with the second elastic arm 733, so as to drive the second elastic arm 733 to adjust the angle between the elastic member 73 and the elastic member 73 to achieve the adjustment of the initial damping force. Among them, the abutment block 755 can be a cam-shaped structure or a linear segment structure. In addition, the side surface of the adjustment shaft 751 can be provided with either a limiting rib 753 or a limiting groove 11, and the carrier 10 can be provided with the other of the limiting rib 753 and the limiting groove 11. There can be multiple limiting grooves 11, which are sequentially distributed around the rotation axis of the adjustment shaft 751. The limiting rib 753 can be inserted into any limiting groove 11 to secure the adjustment shaft 751 relative to the carrier 10. In this case, after the initial damping force generated by the elastic member 73 is adjusted to the desired level by rotating the shaft, the limiting rib 753 can be inserted into the corresponding limiting groove 11 to secure the adjustment shaft 751 relative to the carrier 10, thereby ensuring that the elastic member 73 remains stably in the adjusted state until the initial damping force generated by the elastic member 73 is adjusted again. To improve the securing effect of the adjustment shaft 751 relative to the carrier 10 after adjustment, the number of limiting ribs 753 can be equal to the number of limiting grooves 11. In addition, the adjusting member 75 may further include a handle portion 757, which is sleeved on the end of the adjusting shaft 751 away from the abutment block 755. In this way, the handle portion 757 can be used to better provide a gripping position, thereby facilitating the user to drive the adjusting shaft 751 to rotate through the handle portion 757.

[0067] Please refer to Figure 3 、 Figure 5 as well as Figure 6 In one embodiment of the present invention, the gear portion 711 includes a gear body 712, an outer convex tooth 714 and an inner convex tooth 715. The gear body 712 is an annular structure and is rotatably disposed on the carrier 10; the outer convex tooth 714 is disposed on the outer wall of the gear body 712 and can be abutted and driven by the elastic body 50 when the elastic body 50 is stretched; the inner convex tooth 715 is disposed on the inner wall of the gear body 712, and the claw portion 717 and the elastic member 73 are both located on the inner side of the gear body 712, and the claw portion 717 can abut between two adjacent inner convex teeth 715.

[0068] In this embodiment, the gear portion 711 is configured as an annular structure so that the claw portion 717, the elastic member 73, and the adjusting member 75 can all be disposed on the inner side of the gear portion 711 to further improve the compactness of their distribution, thereby facilitating further saving of installation space. Moreover, at this time, it is also convenient that at least two claw portions 717 can be evenly spaced around the rotation axis of the gear portion 711, and one elastic member 73 is disposed corresponding to one claw portion 717. In this way, damping force can be generated more stably and effectively by at least two claw portions 717 and elastic member 73. At this time, the adjusting shaft 751 can also be provided with at least two abutment blocks 755 around its rotation axis, and one abutment block 755 is disposed corresponding to one elastic member 73.

[0069] Please refer to Figure 3 In one embodiment of the present invention, the resistance generating structure 70 further includes a gear damper 77, which is used to provide a damping force when the gear portion 711 is rotated by the stretched elastic body 50.

[0070] In this embodiment, the gear damper 77 can provide a damping force to the gear portion 711. In this way, when the elastic member 73 is stretched quickly, the gear portion 711 can be prevented from rotating rapidly due to the influence of the instantaneous large abutting force, thereby causing the entire telescopic mechanism 100 to rotate rapidly and fail internally due to jamming. In other words, the provision of the gear damper 77 can prevent the telescopic mechanism 100 from automatically locking when subjected to instantaneous force, thereby ensuring that the telescopic mechanism 100 releases and tightens the force at a uniform speed. The gear damper 77 can also be provided on the inner side of the gear body 712 of the gear portion 711 and mesh with the inner side of the gear body 712 to improve the compactness of the distribution. Of course, the gear damper 77 can also be integrated with the gear portion 711.

[0071] In one embodiment of the present invention, in order to improve the convenience of processing and forming the carrier 10 and installing various components. Figures 6 to 9The gear body 712 of the gear portion 711 is provided with a mounting plate 713 on the inner side of one end thereof in the axial direction. The carrier 10 may include a main plate 13 and a clamping plate 15. Part of the structure of the clamping plate 15 passes through the gear body 712 and is connected to the main plate 13. The clamping plate 15 cooperates with the main plate 13 to clamp the mounting plate 713, thereby allowing the gear body 712 to rotate in the circumferential direction after being clamped and installed, while being limited in the axial direction. Correspondingly, the elastic body 50 can be provided on the main plate 13, the claw portion 717 and the gear damper 77 are installed on the clamping plate 15, and the rotating shaft of the adjusting member 75 can sequentially pass through the main plate 13 and the clamping plate 15 and extend into the inner side of the gear body 712. The limiting groove 11 can be provided on the wall of the through hole 17 on the clamping plate 15 for the adjusting shaft 751 to pass through. At this time, the gear portion 711 is installed by relatively simple clamping. The claw portion 717, elastic member 73, gear damper 77, and limiting groove 11 are all arranged on the relatively small clamping plate 15, which is conducive to improving the convenience of installing this part of the structure. Furthermore, the gear portion 711 can also include a covering plate 716. This covering plate 716 can be installed on the end of the gear body 712 away from the mounting plate 713 to cover and isolate the claw portion 717, elastic member 73, abutment block 755 of the adjustment member 75, and gear damper 77 located on the inner side of the gear body 712, thereby providing a certain degree of protection for them and extending their service life.

[0072] The present invention also provides a head-mounted display device, which includes a telescopic mechanism 100. The specific structure of the telescopic mechanism 100 refers to the above embodiment. Since the present head-mounted display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described one by one here.

[0073] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A telescopic mechanism, characterized in that: include: carrier; a strap member slidably disposed on the carrier; an elastic body connected to the carrier and the strap member, and capable of being stretched by the strap member when the strap member slides; as well as a resistance generating structure, the resistance generating structure being used to apply a damping force to the stretching movement of the elastic body, and being capable of adjusting the magnitude of the damping force generated by the resistance generating structure; The resistance generating structure includes a moving member and an elastic member; the moving member is movably provided on the carrier and can be driven to move by the elastic member when the elastic member is stretched; the elastic member is provided between the carrier and the moving member, and can be elastically deformed when the moving member is driven by the elastic member to apply a damping force to the stretching movement of the elastic member; The movable member includes a gear portion and a claw portion; the gear portion is rotatably mounted on the carrier, and at least one protruding tooth of the gear portion abuts against the elastic body; one end of the claw portion is rotatably mounted on the carrier, and the other end abuts between two adjacent protruding teeth of the gear portion; The elastic member is provided between the claw portion and the supporting body, and when the elastic body is stretched and the claw portion is driven to rotate via the gear portion, the elastic member can be driven by the claw portion to undergo elastic deformation.

2. The telescopic mechanism according to claim 1, wherein: The movable member is rotatably disposed on the supporting body and can be driven to rotate by the elastic body when the elastic body is stretched.

3. The telescopic mechanism according to claim 1, wherein: The elastic member comprises: a first elastic arm connected to an end of the claw portion away from the gear portion; and The second elastic arm has one end provided on the carrier and the other end connected to the end of the first elastic arm away from the claw portion, and the second elastic arm is provided at an angle thereto.

4. The telescopic mechanism according to claim 3, wherein: The resistance generating structure further includes an adjusting member, which is movably provided on the carrier and can be fixed relative to the carrier; When the adjusting member moves relative to the supporting body, the adjusting member can also abut against and drive the second elastic arm to adjust the size of the angle formed by the second elastic arm and the first elastic arm.

5. The telescopic mechanism according to claim 4, wherein: The adjusting member comprises: an adjusting shaft, the adjusting shaft being rotatably disposed on the carrier and being positionally fixed relative to the carrier during rotation; and An abutment block, one end of which is rotatably connected to the adjustment shaft, and the other end of which abuts against the second elastic arm. When the abutment block is driven by the adjustment shaft, it can abut and drive the second elastic arm.

6. The telescopic mechanism according to claim 5, wherein: The side circumference of the adjusting shaft is provided with one of a limiting rib and a limiting groove, and the carrier is provided with the other of the limiting rib and the limiting groove; the limiting grooves are multiple in number and are sequentially distributed around the rotation axis of the adjusting shaft; the limiting rib can be embedded in any of the limiting grooves to limit and fix the adjusting shaft relative to the carrier; And / or, the adjusting member further includes a handle portion, and the handle portion is sleeved on an end of the adjusting shaft away from the abutting block.

7. The telescopic mechanism according to any one of claims 1 to 6, wherein: The gear portion includes a gear body, an outer convex tooth, and an inner convex tooth. The gear body is an annular structure and is rotatably mounted on the carrier. The outer convex tooth is mounted on the outer side wall of the gear body and can be abutted and driven by the elastic body when the elastic body is stretched. The inner convex tooth is mounted on the inner side wall of the gear body. The claw portion and the elastic member are both located on the inner side of the gear body, and the claw portion can abut between two adjacent inner convex teeth. And / or, the resistance generating structure further includes a gear damper, and the gear damper is used to provide a damping force when the elastic body driven by the stretched gear portion rotates.

8. A head-mounted display device, characterized in that: Comprising the telescopic mechanism according to any one of claims 1 to 7.

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