Headband adjustment device and head-mounted display device

Abstract

This application provides a headband adjustment device and a head-mounted display device. The headband adjustment device includes a base, a rotating component, an adjustment gear, two straps, and a handwheel. The base is a hollow column, with one end connected to a headrest housing and a ratchet tooth on the inner wall of the other end. The rotating component is rotatably connected to the base. The rotating component includes a first arm and a second arm. The first arm includes a first pawl that meshes with the ratchet tooth, and the second arm includes a second pawl that meshes with the ratchet tooth. The adjustment gear is connected to the rotating component. Each strap includes a rack that meshes with the opposite side of the adjustment gear. The handwheel is rotatably connected to the base. When the handwheel is rotated, the first pawl and / or the second pawl disengage from the ratchet tooth, and the rotating component drives the adjustment gear to rotate, causing the two straps to move towards or away from each other. When the first pawl and the second pawl mesh with the ratchet tooth, the rotating component is locked, thus solving the technical problem that the head-mounted display device cannot be securely worn on the user's head.

Description

[0001] This application is a divisional application of Chinese patent application filed on May 25, 2023, with application number 202310595831.7 and entitled "Headband Adjustment Device and Head-Mounted Display Device". Technical Field

[0002] This application relates to the field of head-mounted display device technology, specifically to a headband adjustment device and a head-mounted display device. Background Technology

[0003] Head-mounted display devices (VR headsets, VR glasses) are a novel technology in modern display technology. Their display principle involves displaying images for the left and right eyes separately on the left and right screens. The human eye receives this differentiated information and generates a sense of depth in the brain. Head-mounted displays can isolate the wearer from external vision and hearing, guiding the user to feel as if they are in a virtual environment, making them crucial for applications in augmented reality, virtual reality, and stereoscopic displays.

[0004] With the increasing popularity and development of VR technology, head-mounted display devices are being used in various fields, including gaming, performances, sports competitions, e-commerce, education, real estate, and medicine. Current head-mounted display devices typically use a loop strap to be worn around the user's head. Because head circumferences vary among users, a fastener is installed at the back of the head or on the head of the device to adjust the length of the strap.

[0005] Because the skin on the head has a certain degree of elasticity, when a user wears a head-mounted display device, their head exerts a reaction force on the straps, causing the straps to gradually loosen. During activities such as gaming or sports, the head-mounted display device cannot be stably and securely worn on the user's head, thus affecting the user experience. Summary of the Invention

[0006] This application provides a headband adjustment device and a head-mounted display device to solve the technical problem that existing head-mounted display devices cannot be stably and securely worn on the user's head, thus affecting the user experience.

[0007] This application provides a headband adjustment device including a base, a rotating component, an adjusting gear, at least two straps, and a handwheel. The base is a hollow column, one end of which is connected to a headrest housing, and the inner wall of the other end is provided with ratchet teeth. The rotating component is rotatably connected to the base. The rotating component includes a first arm and a second arm. The first arm includes a first pawl that meshes with the ratchet teeth, and the second arm includes a second pawl that meshes with the ratchet teeth. The adjusting gear is connected to the rotating component. Each strap includes a rack, which meshes with the opposite side of the adjusting gear. The handwheel is rotatably connected to the base. When the handwheel is rotated, the first pawl and / or the second pawl disengage from the ratchet teeth, and the rotating component can drive the adjusting gear to rotate, causing the two straps to move towards or away from each other. When the first pawl and the second pawl mesh with the ratchet teeth, the rotating component is locked. The first arm includes a first abutting sidewall, which includes a first abutting portion. The second arm comprises a second abutment portion, a first adjusting portion, a third abutment portion, and a second adjusting portion. The first abutment portion is located at the end of the first abutment sidewall near the first pawl. The second abutment portion is located in the middle of the first abutment sidewall. The third abutment portion is located at the end of the first abutment sidewall away from the first pawl. The first adjusting portion is located between the first abutment portion and the second abutment portion. The second adjusting portion is located between the second abutment portion and the third abutment portion. The second arm includes a second abutment sidewall, which includes a fourth abutment portion, a fifth abutment portion, a third adjusting portion, a sixth abutment portion, and a fourth adjusting portion. The fourth abutment portion is located at the end of the second abutment sidewall near the second pawl. The fifth abutment portion is located in the middle of the second abutment sidewall. The sixth abutment portion is located at the end of the second abutment sidewall away from the second pawl. The third adjusting portion is located between the fourth abutment portion and the fifth abutment portion. The fourth adjusting portion is located between the fifth abutment portion and the sixth abutment portion.

[0008] The distance between the first adjusting part and the central axis of the rotating component is greater than the distance between the second abutting part and the central axis of the rotating component, and less than or equal to the distance between the first abutting part and the central axis of the rotating component; the distance between the second abutting part and the central axis of the rotating component is equal to the distance between the third abutting part and the central axis of the rotating component, and less than the distance between the second adjusting part and the central axis of the rotating component; the distance between the third adjusting part and the central axis of the rotating component is greater than the distance between the fifth abutting part and the central axis of the rotating component, and less than or equal to the distance between the fourth abutting part and the central axis of the rotating component; the distance between the fifth abutting part and the central axis of the rotating component is equal to the distance between the sixth abutting part and the central axis of the rotating component, and less than the distance between the fourth adjusting part and the central axis of the rotating component.

[0009] This application provides a headband adjustment device and a head-mounted display device. In this embodiment, the relative movement of the two straps can be controlled by the meshing state of the first pawl, the second pawl, and the ratchet. When the first pawl and / or the second pawl disengages from the ratchet, the lock between the rotating member and the base is released. Therefore, the rotating member can drive the two straps to move towards or away from each other based on the meshing of the adjusting gear and the rack. Thus, the space enclosed by the straps can be adjusted by the rotating member, so that the head-mounted display device can be adapted to users with different head sizes.

[0010] When a user wears a head-mounted display device, the head exerts a reaction force on the two straps. The adjusting gear can transmit the reaction force to the rotating component. Since the abutting force between the first pawl and the ratchet, and the abutting force between the second pawl and the ratchet are both opposite to the direction of the reaction force, the rotation of the rotating component can be restricted, so that the user will not loosen the head-mounted display device when wearing it, thus improving the user experience. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a partial structural diagram of the head-mounted display device provided in this application;

[0013] Figure 2 This is an exploded schematic diagram of the headband adjustment device provided in this application;

[0014] Figure 3 This is a side sectional view of the headband adjustment device provided in this application;

[0015] Figure 4 This is a schematic diagram of the structure of the base in the headband adjustment device provided in this application;

[0016] Figure 5 This is a schematic diagram of the rotating component in the headband adjustment device of Embodiment 1 provided in this application;

[0017] Figure 6 This is a front view of the rotating component in the headband adjustment device of Embodiment 1 provided in this application;

[0018] Figure 7 This is a front sectional view of the headband adjustment device provided in this application;

[0019] Figure 8 This is a cross-sectional view of the headband adjustment device moving clockwise in Embodiment 1 provided in this application;

[0020] Figure 9 This is a cross-sectional view of the headband adjustment device rotating counterclockwise in Embodiment 1 provided in this application;

[0021] Figure 10 This is a front view of the rotating component in the headband adjustment device of Embodiment 2 provided in this application;

[0022] Figure 11 This is a front view of the rotating component in the headband adjustment device of Embodiment 3 provided in this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Headrest housing; 110. First housing; 120. Second housing; 200. Base; 210. Racket tooth; 300. Main body; 310. First connecting post; 400. First support arm; 410. First rod; 420. Second rod; 421. First abutment part; 422. Second abutment part; 423. Third abutment part; 424. First adjustment part; 425. Second adjustment part; 430. First pawl; 440. First groove; 500 510. Second arm; 520. Third rod; 521. Fourth rod; 522. Fourth abutment; 523. Fifth abutment; 524. Sixth abutment; 525. Third adjustment part; 526. Fourth adjustment part; 530. Second pawl; 540. Second groove; 600. Handwheel; 610. First column; 620. Second column; 630. Second connecting column; 700. Adjusting gear; 710. Idler wheel; 800. Strap; 810. Rack. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0026] This application provides a headband adjustment device and a head-mounted display device, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0027] Example 1

[0028] Please see Figure 1 This application provides a head-mounted display device, which includes a display body (not shown), a headrest housing 100, and a headband adjustment device. The display body can send optical signals to the eyes; the headrest housing 100 can fit against the back of the user's head for wearing assistance. The headband adjustment device includes at least two straps 800, one end of each strap 800 is inserted into the headrest housing 100, and the other end is connected to the display body. Thus, the display body, the straps 800, and the headrest housing 100 can form a surrounding space to fit the user's head.

[0029] Please see Figure 1 and Figure 2 The headrest housing 100 is a hollow, waist-shaped structure that includes a receiving cavity. A headband adjustment device is installed inside the receiving cavity to drive the two straps 800 to move towards or away from each other, so that the display body and the headrest housing 100 respectively fit against the user's face and the back of the head, thereby adapting to users with different head sizes.

[0030] In this application, the headrest housing 100 is assembled from a first housing 110 and a second housing 120. The base 200 of the headband adjustment device is connected to the first housing 110, so that the headband adjustment device is relatively fixed to the first housing 110. Then, the second housing 120 is placed over the headband adjustment device, and the first housing 110 and the second housing 120 are locked together with fastening screws. The assembled first housing 110 and second housing 120 facilitate the assembly of the headband adjustment device and the headrest housing 100, which can improve assembly efficiency.

[0031] Please see Figure 1 The head-mounted display device also includes a power supply component, which in this application is a battery pack (not shown in the figure). The battery pack is installed within the receiving cavity to achieve a miniaturized design of the head-mounted display device.

[0032] Please see Figures 2-4 The headband adjustment device includes a base 200, a rotating component, a handwheel 600, and an adjusting gear 700. The base 200 is a hollow cylinder with opposing first and second ends, and the aperture of the second end is larger than that of the first end. The first end is connected to the first housing 110 by fastening screws, thus fixing the base 200 to the headrest housing 100; the second end extends toward the second housing 120, and its inner wall is provided with ratchet teeth 210.

[0033] Please see Figures 2-5The rotating component is rotatably connected to the base 200. The rotating component includes a main body 300, a first support arm 400, and a second support arm 500. A first connecting post 310 is located at the center of the main body 300 and is inserted into the base 200, allowing it to rotate within the base 200. The first support arm 400 and the second support arm 500 are respectively connected to both sides of the main body 300. The outer wall of the first support arm 400 is provided with a first pawl 430 that engages with the ratchet 210, and the outer side of the second support arm 500 is provided with a second pawl 530 that engages with the ratchet 210. In this application, one end of the first support arm 400 is connected to the main body 300, and its other end abuts against the ratchet 210 via the first pawl 430. Similarly, one end of the second support arm 500 is connected to the main body 300, and its other end abuts against the ratchet 210 via the second pawl 530.

[0034] Please see Figures 4-6 Because the ends of the first arm 400 and the second arm 500 furthest from the main body 300 have good elastic deformation properties, in this application, the first pawl 430 is positioned close to the end of the first arm 400, and the second pawl 530 is positioned close to the end of the second arm 500. Utilizing the elastic deformation of the first arm 400 and the second arm 500, the first pawl 430 and / or the second pawl 530 can disengage from and engage with the ratchet 210, thereby precisely controlling the movement state of the rotating component.

[0035] Please see Figure 2 and Figure 5 The adjusting gear 700 is connected to the first connecting post 310 of the rotating component. When the rotating component rotates relative to the base 200, the first connecting post 310 can drive the adjusting gear 700 to rotate. The end of the strap 800 inserted into the headrest housing 100 is provided with a rack 810, which can directly or indirectly mesh with the adjusting gear 700. In this application, the two straps 800 extend circumferentially along the user's head to the left and right sides of the adjusting gear 700, and the racks 810 at the ends of the straps 800 extend to the upper and lower sides of the adjusting gear 700, respectively. When the adjusting gear 700 rotates, the two straps 800 can be driven to move in opposite directions or towards each other through gear meshing, thereby adjusting the size of the space enclosed by the straps 800 to adapt to the head circumference of different users.

[0036] Please see Figure 6 and Figure 7The handwheel 600 is rotatably connected to the base 200. A second connecting post 630 is provided at the center of the handwheel 600, which can be inserted into the base 200. The handwheel 600 is provided with a first post 610 corresponding to the first support arm 400 and a second post 620 corresponding to the second support arm 500. When the handwheel 600 and the rotating component are both assembled to the base 200, the first post 610 is attached to the first abutting side wall of the first support arm 400, and the second post 620 is attached to the second abutting side wall of the second support arm 500. Therefore, the rotating component can be driven to rotate by the first post 610 and the second post 620.

[0037] When the first post 610 and the second post 620 abut against the first arm 400 and the second arm 500 respectively, causing the first pawl 430 and / or the second pawl 530 to disengage from the ratchet 210, the handwheel 600 drives the rotating component to rotate. Simultaneously, the rotating component can drive the two straps 800 to move towards or away from each other by adjusting the meshing between the gear 700 and the rack 810. When the driving force acting on the handwheel 600 disappears, both the first pawl 430 and the second pawl 530 engage with the ratchet 210, locking the rotating component relative to the base 200 and thus fixing the relative position of the two straps 800.

[0038] Please see Figure 7 The central angle formed between the free end of the first arm 400 and the free end of the second arm 500 is an acute angle. Therefore, when the first pawl 430 and the second pawl 530 simultaneously engage with the ratchet 210, the rotating part can be locked relative to the base 200.

[0039] Please see Figure 2 and Figure 7 When opposing forces are applied to the two straps 800, the meshing of the rack 810 with the adjusting gear 700 causes the adjusting gear 700 and the rotating component to be subjected to a clockwise force. At this time, the surface a1 of the first pawl 430 abuts against the ratchet 210, causing the abutting force acting on the first pawl 430 to be decomposed into F1x and F1y; at the same time, the surface b1 of the second pawl 530 abuts against the ratchet 210, causing the abutting force acting on the second pawl 530 to be decomposed into F2x and F2y. Since the directions of the forces F1y and F2y in the schematic diagram are counterclockwise, and the force applied by the adjusting gear 700 to the rotating component is clockwise, the rotating component is locked by the first pawl 430 and the second pawl 530 under the combined action of the opposing forces.

[0040] Similarly, when opposite forces are applied to the two straps 800 respectively, through the engagement of the rack 810 and the adjusting gear 700, a counterclockwise force is applied to the adjusting gear 700 and the rotating member. At this time, the other surface a2 of the first pawl 430 abuts against the ratchet teeth 210, and at the same time, the other surface b2 of the second pawl 530 abuts against the ratchet teeth 210. Since the force applied by the abutting force on the rotating member is clockwise and the force applied by the adjusting gear 700 on the rotating member is counterclockwise, under the combined action of the opposite forces, the rotating member is locked by the first pawl 430 and the second pawl 530.

[0041] Please refer to Figure 7 , the first arm 400 and the second arm 500 are symmetrically distributed about the center of the rotating member, so that the forces borne by the rotating member are relatively balanced, and at the same time, the assembly difficulty between the rotating member and the handwheel 600 can be reduced.

[0042] Please refer to Figure 7 , the first arm 400 includes a first abutting side wall adapted to the first column 610. The first abutting side wall includes a first abutting portion 421, a second abutting portion 422, and a third abutting portion 423 arranged in sequence. The first abutting portion 421 is located at the end of the first abutting side wall close to the first pawl 430, the third abutting portion 423 is located at the end of the first abutting side wall away from the first pawl 430, and the second abutting portion 422 is located between the first abutting portion 421 and the third abutting portion 423.

[0043] Define the distance between the first abutting portion 421 and the central axis of the rotating member as La1, the distance between the second abutting portion 422 and the central axis of the rotating member as La2, and the distance between the third abutting portion 423 and the central axis of the rotating member as La3. Among them, La2 < La1 and La2 = La3. The area of the first abutting side wall between the first abutting portion 421 and the second abutting portion 422 is an inclined surface. When the first column 610 moves from the second abutting portion 422 to the first abutting portion 421, since the distance between the first column 610 and the central axis of the rotating member remains unchanged, the first column 610 can apply a centripetal force to the first arm 400, causing the first arm 400 to gradually deform toward the center of the rotating member, so that the first pawl 430 provided at the end of the first arm 400 disengages from the ratchet teeth 210. Similarly, the area of the first abutting side wall between the second abutting portion 422 and the third abutting portion 423 is a plane. When the first column 610 moves from the second abutting portion 422 to the third abutting portion 423, since the distance between the second abutting portion 422 and the central axis of the rotating member is equal to the distance between the third abutting portion 423 and the central axis of the rotating member, the first arm 400 maintains its initial state, so that the first pawl 430 and the ratchet teeth 210 remain engaged.

[0044] Please refer to Figure 7 The second arm 500 includes a second abutting side wall adapted to the second upright post 620. The second abutting side wall includes a fourth abutting portion 521, a fifth abutting portion 522, and a sixth abutting portion 523 arranged in sequence. The fourth abutting portion 521 is located at the end of the second abutting side wall close to the second pawl 530, the sixth abutting portion 523 is located at the end of the second abutting side wall away from the second pawl 530, and the fifth abutting portion 522 is located between the fourth abutting portion 521 and the sixth abutting portion 523.

[0045] Define the distance between the fourth abutting portion 521 and the central axis of the rotating member as Lb1, the distance between the fifth abutting portion 522 and the central axis of the rotating member as Lb2, and the distance between the sixth abutting portion 523 and the central axis of the rotating member as Lb3, where Lb2 < Lb1 and Lb2 = Lb3. The area of the second abutting side wall between the fourth abutting portion 521 and the fifth abutting portion 522 is an inclined surface. When the second upright post 620 moves from the fifth abutting portion 522 to the fourth abutting portion 521, since the distance between the second upright post 620 and the central axis of the rotating member remains unchanged, the second upright post 620 can apply a centripetal force to the second arm 500, causing the second arm 500 to gradually deform towards the center of the rotating member, so that the second pawl 530 provided at the end of the second arm 500 disengages from the ratchet teeth 210. Similarly, the area of the second abutting side wall between the fifth abutting portion 522 and the sixth abutting portion 523 is a plane. When the second upright post 620 moves from the fifth abutting portion 522 to the sixth abutting portion 523, since the distance between the fifth abutting portion 522 and the central axis of the rotating member is equal to the distance between the sixth abutting portion 523 and the central axis of the rotating member, the second arm 500 maintains its initial state, so that the second pawl 530 remains engaged with the ratchet teeth 210.

[0046] Please refer to Figure 7 and Figure 8 In the initial state, the first upright post 610 abuts against the second abutting portion 422, and the second upright post 620 abuts against the fifth abutting portion 522. When the handwheel 600 is rotated in the first direction (clockwise in this application), the first upright post 610 moves from the second abutting portion 422 to the first abutting portion 421, and the second upright post 620 moves from the fifth abutting portion 522 to the sixth abutting portion 523, so that the first pawl 430 disengages from the ratchet teeth 210, and the second pawl 530 remains engaged with the ratchet teeth 210. When the first upright post 610 abuts against the first abutting portion 421 and the second upright post 620 abuts against the sixth abutting portion 523, the first upright post 610 and the second upright post 620 can be used to drive the rotating member to rotate clockwise, thereby driving the adjusting gear 700 to move clockwise, and driving the two straps 800 to move towards each other through the engagement of the adjusting gear 700 and the rack 810.

[0047] Please refer to Figure 7 and Figure 9 When the handwheel 600 is rotated in the second direction (counterclockwise in this application), the first column 610 moves from the second abutment 422 to the third abutment 423, and the second column 620 moves from the fifth abutment 522 to the fourth abutment 521, so that the first pawl 430 remains engaged with the ratchet 210, and the second pawl 530 disengages from the ratchet 210. When the first column 610 abuts to the third abutment 423 and the second column 620 abuts to the fourth abutment 521, the first column 610 and the second column 620 can drive the rotating component to rotate counterclockwise, thereby driving the adjusting gear 700 to move counterclockwise, and through the meshing of the adjusting gear 700 with the rack 810, the two straps 800 move in opposite directions.

[0048] Please see Figures 5-7 The first support arm 400 includes a first rod 410 and a second rod 420, both of which are arranged circumferentially along the rotating component to facilitate the mating of the first pawl 430 and the ratchet 210 on the first support arm 400. The first rod 410 and the second rod 420 are arranged axially along the rotating component, with the first rod 410 located inside the base 200 and the second rod 420 protruding from the surface of the base 200. Both ends of the second rod 420 are connected to the first rod 410, and the first pawl 430 is located at the connection point between the first rod 410 and the second rod 420, increasing the strength of the first support arm 400 at the first pawl 430.

[0049] Please see Figure 5 and Figure 7 The second rod 420 has a concave middle section forming the aforementioned first abutting sidewall. Since the second rod 420 protrudes from the surface of the base 200, it has good elastic properties. The first column 610 and the first abutting sidewall are used to cause the second rod 420 to undergo an elastic deformation, and the deformation of the second rod 420 is used to adjust the relative state of the first pawl 430 and the ratchet 210.

[0050] Both ends of the second rod 420 are connected to the first rod 410, allowing the first rod 410 and the second rod 420 to move synchronously. The first rod 410 is arranged circumferentially along the rotating component and is located inside the base 200, giving it good strength and elastic recovery performance. Because the second rod 420 protrudes from the surface of the base 200, and its middle portion is concave to form a first abutment sidewall, the second rod 420 exhibits good elastic deformation performance. The first pawl 430 is located at the connection between the first rod 410 and the second rod 420, and at the end of the first support arm 400. This gives the first support arm 400 good strength and elastic deformation performance, which can extend its service life. At the same time, the second rod 420 cooperates with the first column 610 to realize the engagement and disengagement of the first pawl 430 and the ratchet 210. The first rod 410 can assist the second rod 420 in resetting, so that the first support arm 400 returns to its initial position and shape, thereby ensuring the engagement accuracy of the first pawl 430 and the ratchet 210.

[0051] Please see Figure 5 and Figure 7 The second support arm 500 includes a third rod 510 and a fourth rod 520. Both the third rod 510 and the fourth rod 520 are arranged circumferentially along the rotating component, facilitating the mating of the second pawl 530 and the ratchet 210 on the second support arm 500. The third rod 510 and the fourth rod 520 are arranged axially along the rotating component, with the third rod 510 located inside the base 200 and the fourth rod 520 protruding from the surface of the base 200. Both ends of the fourth rod 520 are connected to the third rod 510, and the second pawl 530 is located at the connection point between the third rod 510 and the fourth rod 520, thereby increasing the strength of the second support arm 500 at the second pawl 530.

[0052] The fourth rod 520 has a concave middle section forming the aforementioned second abutting sidewall. Since the fourth rod 520 protrudes from the surface of the base 200, it has good elastic properties. The fourth rod 520 undergoes an elastic deformation due to the cooperation between the second column 620 and the second abutting sidewall, and the deformation of the fourth rod 520 is used to adjust the relative state of the second pawl 530 and the ratchet 210.

[0053] Both ends of the fourth rod 520 are connected to the third rod 510, allowing the third rod 510 and the fourth rod 520 to move synchronously. The third rod 510 is arranged circumferentially along the rotating component and is located inside the base 200, giving it good strength and elastic recovery performance. Because the fourth rod 520 protrudes from the surface of the base 200, and its middle portion is concave to form a second abutment sidewall, the fourth rod 520 exhibits good elastic deformation performance. The second pawl 530 is located at the connection between the third rod 510 and the fourth rod 520, and at the end of the second arm 500, giving the second arm 500 good strength and elastic deformation performance, which can extend its service life. At the same time, the fourth rod 520 cooperates with the second column 620 to realize the engagement and disengagement of the second pawl 530 and the ratchet 210. The third rod 510 can assist the fourth rod 520 to reset, so that the second arm 500 returns to its initial position and shape, thereby ensuring the engagement accuracy of the second pawl 530 and the ratchet 210.

[0054] Please see Figure 5 The second rod 420 has a first groove 440 on its surface facing the base 200. The opening position of the first groove 440 corresponds to the first abutting sidewall, thereby improving the elastic deformation performance of the second rod 420.

[0055] Meanwhile, the surface of the fourth rod 520 facing the base 200 is provided with a second groove 540, the opening position of which corresponds to the second abutment sidewall, thereby improving the elastic deformation performance of the fourth rod 520.

[0056] Please see Figure 2 and Figure 3 The headband adjustment device also includes at least two idler gears 710. The adjustment gear 700 meshes with an idler gear 710, and in this application, the idler gear 710 and the rack 810 correspond one-to-one. The adjustment gear 700 can drive the rack 810 to move through the idler gear 710, thereby allowing the selection of a smaller adjustment gear 700, which is beneficial for achieving lightweight and miniaturized design of the head-mounted display device.

[0057] Please see Figures 2-9 In this embodiment, the relative movement of the two straps 800 can be controlled by the meshing state of the first pawl 430, the second pawl 530 and the ratchet 210. When the first pawl 430 and / or the second pawl 530 disengage from the ratchet 210, the lock between the rotating member and the base 200 is released. Therefore, the rotating member can drive the two straps 800 to move towards or away from each other based on the meshing of the adjusting gear 700 and the rack 810. Thus, the space enclosed by the straps 800 can be adjusted by the rotating member, so that the head-mounted display device can be adapted to users with different head sizes.

[0058] When a user wears a head-mounted display device, the head exerts a reaction force on the two straps 800. The adjusting gear 700 can transmit the reaction force to the rotating component. Since the abutting force between the first pawl 430 and the ratchet 210, and the abutting force between the second pawl 530 and the ratchet 210 are both opposite to the direction of the reaction force, the rotation of the rotating component can be restricted, so that the user will not loosen the head-mounted display device when wearing it, thus improving the user experience.

[0059] Example 2

[0060] This application provides a head-mounted display device that differs from Embodiment 1 in that the first abutting sidewall of the first arm 400 and the second abutting sidewall of the second arm 500 are different.

[0061] Please see Figure 7 and Figure 10 The first abutting sidewall includes a first abutting portion 421, a second abutting portion 422, and a third abutting portion 423 arranged sequentially. The first abutting portion 421 is located at the end of the first abutting sidewall near the first pawl 430, and the third abutting portion 423 is located at the end of the first abutting sidewall away from the first pawl 430. The second abutting portion 422 is located between the first abutting portion 421 and the third abutting portion 423. The distance between the second abutting portion 422 and the central axis of the rotating component is less than the distance between the first abutting portion 421 and the central axis of the rotating component, and the distance between the second abutting portion 422 and the central axis of the rotating component is less than the distance between the third abutting portion 423 and the central axis of the rotating component.

[0062] The second abutting sidewall includes a fourth abutting portion 521, a fifth abutting portion 522, and a sixth abutting portion 523 arranged sequentially. The fourth abutting portion 521 is located at the end of the second abutting sidewall near the second pawl 530, and the sixth abutting portion 523 is located at the end of the second abutting sidewall away from the second pawl 530. The fifth abutting portion 522 is located between the fourth abutting portion 521 and the sixth abutting portion 523. The distance between the fifth abutting portion 522 and the central axis of the rotating component is less than the distance between the fourth abutting portion 521 and the central axis of the rotating component, and the distance between the fifth abutting portion 522 and the central axis of the rotating component is less than the distance between the sixth abutting portion 523 and the central axis of the rotating component.

[0063] Please see Figure 7 and Figure 10In the initial state, the first column 610 abuts against the second abutment portion 422, and the second column 620 abuts against the fifth abutment portion 522. When the handwheel 600 is rotated in the first direction (clockwise in this application), the first column 610 moves from the second abutment portion 422 to the first abutment portion 421, and the second column 620 moves from the fifth abutment portion 522 to the sixth abutment portion 523, causing both the first pawl 430 and the second pawl 530 to disengage from the ratchet tooth 210. When the first column 610 abuts against the first abutment portion 421 and the second column 620 abuts against the sixth abutment portion 523, the first column 610 and the second column 620 can drive the rotating component to rotate clockwise, thereby driving the adjusting gear 700 to move clockwise, and through the meshing of the adjusting gear 700 and the rack 810, driving the two straps 800 to move towards each other.

[0064] When the handwheel 600 is rotated in the second direction (counterclockwise in this application), the first column 610 moves from the second abutment 422 to the third abutment 423, and the second column 620 moves from the fifth abutment 522 to the fourth abutment 521, causing both the first pawl 430 and the second pawl 530 to disengage from the ratchet 210. When the first column 610 abuts to the third abutment 423 and the second column 620 abuts to the fourth abutment 521, the first column 610 and the second column 620 can drive the rotating component to rotate counterclockwise, thereby driving the adjusting gear 700 to move counterclockwise, and through the meshing of the adjusting gear 700 and the rack 810, driving the two straps 800 to move in opposite directions.

[0065] Please see Figure 7 and Figure 10 When the handwheel 600 drives the adjusting gear 700 to rotate through the rotating component, the first column 610 and the second column 620 press the first support arm 400 and the second support arm 500 respectively, so that the first pawl 430 and the second pawl 530 disengage from the ratchet 210, thereby reducing the resistance when the rotating component rotates and improving the adjustment efficiency of the two straps 800.

[0066] All other technical features in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0067] Example 3

[0068] This application provides a head-mounted display device that differs from Embodiment 1 in that the first abutting sidewall of the first arm 400 and the second abutting sidewall of the second arm 500 are different.

[0069] Please see Figure 7 and Figure 11The first abutting sidewall includes a first abutting portion 421, a first adjusting portion 424, a second abutting portion 422, a second adjusting portion 425, and a third abutting portion 423 arranged sequentially. The first abutting portion 421 is located at the end of the first abutting sidewall near the first pawl 430; the third abutting portion 423 is located at the end of the first abutting sidewall away from the first pawl 430; the second abutting portion 422 is located between the first abutting portion 421 and the third abutting portion 423; the first adjusting portion 424 is located between the first abutting portion 421 and the second abutting portion 422; and the second adjusting portion 425 is located between the second abutting portion 422 and the third abutting portion 423.

[0070] The distance between the first adjusting part 424 and the central axis of the rotating part is greater than the distance between the second abutting part 422 and the central axis of the rotating part, and less than or equal to the distance between the first abutting part 421 and the central axis of the rotating part; as the first column 610 gradually moves from the second abutting part 422 to the first adjusting part 424 and the first abutting part 421, the first column 610 applies a centripetal force to the first support arm 400 so that the first pawl 430 disengages from the ratchet 210. The distance between the second abutment part 422 and the central axis of the rotating part is equal to the distance between the third abutment part 423 and the central axis of the rotating part, and less than the distance between the second adjustment part 425 and the central axis of the rotating part. When the first column 610 gradually moves from the second abutment part 422 to the second adjustment part 425, the first column 610 applies a centripetal force to the first support arm 400 so that the first pawl 430 disengages from the ratchet 210. When it continues to move to the third abutment part 423, the force of the first column 610 on the first support arm 400 gradually decreases until it disappears, so that the first pawl 430 engages with the ratchet 210.

[0071] Please see Figure 7 and Figure 11 The second abutting sidewall includes a fourth abutting portion 521, a third adjusting portion 524, a fifth abutting portion 522, a fourth adjusting portion 525, and a sixth abutting portion 523 arranged sequentially. The fourth abutting portion 521 is located at the end of the first abutting sidewall near the first pawl 430; the sixth abutting portion 523 is located at the end of the first abutting sidewall away from the first pawl 430; the fifth abutting portion 522 is located between the fourth abutting portion 521 and the sixth abutting portion 523; the third adjusting portion 524 is located between the fourth abutting portion 521 and the fifth abutting portion 522; and the fourth adjusting portion 525 is located between the fifth abutting portion 522 and the sixth abutting portion 523.

[0072] The distance between the third adjusting part 524 and the central axis of the rotating part is greater than the distance between the fifth abutting part 522 and the central axis of the rotating part, and less than or equal to the distance between the fourth abutting part 521 and the central axis of the rotating part; as the second column 620 gradually moves from the fifth abutting part 522 to the third adjusting part 524 and the fourth abutting part 521, the second column 620 applies a centripetal force to the second support arm 500 so that the second pawl 530 disengages from the ratchet 210. The distance between the fifth abutment part 522 and the central axis of the rotating part is equal to the distance between the sixth abutment part 523 and the central axis of the rotating part, and less than the distance between the fourth adjustment part 525 and the central axis of the rotating part. When the second column 620 gradually moves from the fifth abutment part 522 to the fourth adjustment part 525, the second column 620 applies a centripetal force to the second support arm 500 so that the second pawl 530 disengages from the ratchet 210. When it continues to move to the sixth abutment part 523, the force of the second column 620 on the second support arm 500 gradually decreases until it disappears, so that the second pawl 530 engages with the ratchet 210.

[0073] Please see Figure 7 and Figure 11 In the initial state, the first column 610 abuts against the second abutment part 422, and the second column 620 abuts against the fifth abutment part 522. When the handwheel 600 is rotated in the first direction (clockwise in this application), the first column 610 moves from the second abutment part 422 to the first gear shifting part 424, and the second column 620 moves from the fifth abutment part 522 to the fourth gear shifting part 525, causing both the first pawl 430 and the second pawl 530 to disengage from the ratchet 210. When the first column 610 abuts against the first gear shifting part 424 and the second column 620 abuts against the fourth gear shifting part 525, the first column 610 and the second column 620 can drive the rotating component to rotate clockwise, thereby using the meshing of the adjusting gear 700 and the rack 810 to drive the two straps 800 to move rapidly toward each other. This stage is defined as rapid gear adjustment. When the movement reaches a position close to the user's head circumference, a greater rotational force is applied to the handwheel 600. When the rotational force is greater than the contact force between the first column 610 and the first gear shifting part 424, the first column 610 can move from the first gear shifting part 424 to the first contact part 421. At the same time, the second column 620 moves from the fourth gear shifting part 525 to the sixth contact part 523, so that the first pawl 430 remains disengaged from the ratchet 210, while the second pawl 530 engages with the ratchet 210. Therefore, when the rotating part is driven to continue rotating by the first column 610 and the second column 620, the movement resistance between the rotating part and the ratchet 210 increases, thereby allowing for more precise adjustment of the position between the two straps 800. This stage is defined as precise gear adjustment.

[0074] When the handwheel 600 is rotated in the second direction (counterclockwise in this application), the first column 610 moves from the second abutment part 422 to the second gear shifting part 425, and the second column 620 moves from the fifth abutment part 522 to the third gear shifting part 524, causing both the first pawl 430 and the second pawl 530 to disengage from the ratchet 210. When the first column 610 abuts against the second gear shifting part 425 and the second column 620 abuts against the third gear shifting part 524, the first column 610 and the second column 620 can drive the rotating component to rotate counterclockwise, thereby using the meshing of the adjusting gear 700 and the rack 810 to drive the two straps 800 to move rapidly in opposite directions. This stage is defined as rapid gear adjustment. When the movement reaches a position close to the user's head circumference, a greater rotational force is applied to the handwheel 600. When the rotational force is greater than the contact force between the second column 620 and the third adjustment part 524, the first column 610 can move from the second adjustment part 425 to the third contact part 423, while the second column 620 moves from the third adjustment part 524 to the fourth contact part 521, causing the first pawl 430 to engage with the ratchet 210, while the second pawl 530 remains disengaged from the ratchet 210. Therefore, when the rotating component is driven to continue rotating by the first column 610 and the second column 620, the movement resistance between the rotating component and the ratchet 210 increases, thereby allowing for more precise adjustment of the position between the two straps 800. This stage is defined as precise gear adjustment.

[0075] Please see Figure 7 and Figure 11 When adjusting the relative position between the two straps 800, the position of the straps 800 is first quickly adjusted using the quick adjustment setting. After adjusting to a near-close position, the force applied to the handwheel 600 is increased, switching it to the precision adjustment setting. This allows for a more accurate adjustment of the relative position between the two straps 800, saving adjustment time and improving adjustment efficiency. At the same time, it also improves the accuracy of the adjustment, enabling the head-mounted display device to quickly adapt to users with different head circumferences.

[0076] Please see Figure 7 and Figure 11 The handwheel 600 is rotatably provided with a pressing part (not shown in the figure). The pressing part is connected to a limiting part through a spring piece. The limiting part is a U-shaped structure. The opening of the U-shaped structure faces the rotating part, and the depth of the opening is the same as the thickness of the rotating part, so that the limiting part can be locked on the top of the rotating part, and its bottom end abuts against the base 200.

[0077] When the head-mounted display device needs to switch from a quick adjustment mode to a precise adjustment mode, a force is first applied to the pressing part, and the deformation of the spring drives the limiting part to gradually approach and engage with a portion of the rotating component until the bottom end of the limiting part abuts against the base 200, thus fixing the rotating component relative to the base 200. Then, the handwheel 600 is turned to switch to the precise adjustment mode, and the pressure applied to the pressing part is released, allowing the spring to drive the limiting part to move to its initial position. The relative fixation between the rotating component and the base 200 is released, allowing the first column 610 and the second column 620 to drive the rotating component to rotate.

[0078] The above provides a detailed description of a headband adjustment device and a head-mounted display device provided by this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A headgear adjustment device, characterized by, The utility model relates to a headrest adjusting device, comprising: a base (200) which is a hollow cylinder, one end of the base (200) is connected to a headrest housing (100), and an inner wall of the other end is provided with a ratchet (210); a rotating member which is rotatably connected to the base (200), the rotating member comprises a first arm (400) and a second arm (500), the first arm (400) comprises a first pawl (430) engaged with the ratchet (210), and the second arm (500) comprises a second pawl (530) engaged with the ratchet (210); an adjusting gear (700) connected to the rotating member; at least two straps (800), each of the straps (800) comprises a rack (810) engaged with opposite sides of the adjusting gear (700); and a hand wheel (600) which is rotatably connected to the base (200), the hand wheel (600) is provided with a limiting part which is U-shaped and comprises an opening, a pressing part which is rotatably connected to the hand wheel (600), and a spring piece, the pressing part is connected to the limiting part through the spring piece, the opening is arranged towards the rotating member, and the depth of the opening is the same as the thickness of the rotating member, so that the limiting part can be clamped above the rotating member, and the bottom end thereof abuts against the base; when the hand wheel (600) is rotated, the first pawl (430) and / or the second pawl (530) are disengaged from the ratchet (210), the rotating member can drive the adjusting gear (700) to rotate, so that the two straps (800) move towards or away from each other, and when the first pawl (430) and the second pawl (530) are engaged with the ratchet (210), the rotating member is locked; the first arm (400) comprises a first abutting side wall which comprises: a first abutting part (421) located at the end point of the first abutting side wall close to the first pawl (430); a second abutting part (422) located at the middle of the first abutting side wall; a first gear shifting part (424) located between the first abutting part (421) and the second abutting part (422); a third abutting part (423) located at the end point of the first abutting side wall away from the first pawl (430); and a second gear shifting part (425) located between the second abutting part (422) and the third abutting part (423); the distance between the first gear shifting part (424) and the center axis of the rotating member is greater than the distance between the second abutting part (422) and the center axis of the rotating member, and is less than or equal to the distance between the first abutting part (421) and the center axis of the rotating member, the distance between the second abutting part (422) and the center axis of the rotating member is equal to the distance between the third abutting part (423) and the center axis of the rotating member, and is less than the distance between the second gear shifting part (425) and the center axis of the rotating member. The second arm (500) comprises a second abutting side wall, which comprises: a fourth abutting portion (521) located at an end of the second abutting side wall close to the second pawl (530); a fifth abutting portion (522) located at a middle of the second abutting side wall; a third adjusting portion (524) located between the fourth abutting portion (521) and the fifth abutting portion (522); a sixth abutting portion (523) located at an end of the second abutting side wall away from the second pawl (530); and a fourth adjusting portion (525) located between the fifth abutting portion (522) and the sixth abutting portion (523); The distance between the third adjusting portion (524) and the center axis of the rotating member is greater than the distance between the fifth abutting portion (522) and the center axis of the rotating member, and less than or equal to the distance between the fourth abutting portion (521) and the center axis of the rotating member; the distance between the fifth abutting portion (522) and the center axis of the rotating member is equal to the distance between the sixth abutting portion (523) and the center axis of the rotating member, and less than the distance between the fourth adjusting portion (525) and the center axis of the rotating member.

2. The headgear adjustment device of claim 1, wherein the hand wheel (600) is provided with a first column (610) attached to the first arm (400) and a second column (620) attached to the second arm (500), when the hand wheel (600) is rotated, the first column (610) and the second column (620) push the rotating member to rotate.

3. The headgear adjustment device of claim 2, wherein when the hand wheel (600) is rotated in a first direction, the first column (610) is moved from the second abutting portion (422) to the first adjusting portion (424), and the second column (620) is moved from the fifth abutting portion (522) to the fourth adjusting portion (525), so that the first pawl (430) and the second pawl (530) are both disengaged from the ratchet teeth (210); when the rotating member continues to rotate in the first direction, the first column (610) is moved to the first abutting portion (421), and the second column (620) is moved to the sixth abutting portion (523), so that the first pawl (430) is disengaged from the ratchet teeth (210), and the second pawl (530) is engaged with the ratchet teeth (210). When the hand wheel (600) rotates in the second direction, the first upright column (610) is moved to the second gear shifting portion (425) by the second abutting portion (422), and the second upright column (620) is moved to the third gear shifting portion (524) by the fifth abutting portion (522), so that the first pawl (430) and the second pawl (530) are both disengaged from the ratchet gear (210); when the rotating member continues to rotate in the second direction, the first upright column (610) is moved to the third abutting portion (423), and the second upright column (620) is moved to the fourth abutting portion (521), so that the first pawl (430) is engaged with the ratchet gear (210), and the second pawl (530) is disengaged from the ratchet gear (210); The first direction is opposite to the second direction.

4. The headgear adjustment device of claim 1, wherein The first branch arm (400) comprises a first rod body (410) and a second rod body (420), the first rod body (410) and the second rod body (420) are arranged along the circumference of the rotating member and arranged along the axial direction of the rotating member; the first rod body (410) is located in the base (200), and the second rod body (420) protrudes from the surface of the base (200); both ends of the second rod body (420) are connected to the first rod body (410), and the middle part of the second rod body (420) is recessed to form a first abutting side wall; The second branch arm (500) comprises a third rod body (510) and a fourth rod body (520), the third rod body (510) and the fourth rod body (520) are arranged along the circumference of the rotating member and arranged along the axial direction of the rotating member; the third rod body (510) is located in the base (200), and the fourth rod body (520) protrudes from the surface of the base (200); both ends of the fourth rod body (520) are connected to the third rod body (510), and the middle part of the fourth rod body (520) is recessed to form a second abutting side wall.

5. The headgear adjustment device of claim 4, wherein The second rod body (420) is provided with a first groove (440) facing the surface of the base (200), and the first groove (440) is arranged at a position corresponding to the first abutting side wall; The fourth rod body (520) is provided with a second groove (540) facing the surface of the base (200), and the second groove (540) is arranged at a position corresponding to the second abutting side wall.

6. The headgear adjustment arrangement of claim 1, wherein The rotating member comprises: a main body (300) rotatably connected to the base (200); wherein the first branch arm (400) and the second branch arm (500) are respectively connected to the two sides of the main body (300), and the end of the first branch arm (400) and the end of the second branch arm (500) form an acute angle; The first branch arm (400) and the second branch arm (500) are symmetrically distributed about the center of the rotating member.

7. The headgear adjustment arrangement of claim 1, wherein Further comprising: At least two idler gears (710) are distributed on both sides of the adjusting gear (700), each of the idler gears (710) is engaged between the adjusting gear (700) and one of the racks (810).

8. A head-mounted display device, comprising: Comprise: A headrest shell (100) comprising a receiving cavity; And The headband adjusting device of any one of claims 1-7 is installed in the receiving cavity; Wherein, the base (200) of the headband adjusting device is connected to the headrest shell (100), and the rack (810) of the strap (800) is arranged in the headrest shell (100) and engaged with the adjusting gear (700).

9. The head-mounted display device of claim 8, wherein, Also comprise: A power supply assembly arranged in the receiving cavity.

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