Head mounted display device and strap adjustment device thereof

Abstract

The present invention discloses a strap adjustment device, comprising a support assembly provided with a through hole, a rotating assembly matched with the through hole, two side straps connected to the rotating assembly, a trigger assembly provided on the support assembly to be triggered by the rotating assembly, and front and rear straps that can be fixed relative to the trigger assembly; when the rotating assembly rotates in different directions relative to the through hole, the two side straps extend and retract relative to the support assembly; when the rotating assembly moves in the axial direction of the through hole and triggers the trigger assembly, the trigger assembly loosens or clamps the front and rear straps. The present invention also discloses a head-mounted display device including a strap adjustment device. The above-mentioned strap adjustment device has a wider range of applications and is more comfortable to wear.

Description

Technical Field

[0001] The present invention relates to the technical field of head mounted display devices, and in particular to a head mounted display device and a strap adjusting device thereof. Background Art

[0002] At present, with the continuous advancement of science and technology, smart wearable devices are becoming more and more popular, among which VR (virtual reality) devices are relatively popular products on the market.

[0003] Current VR devices are often worn on the head and can be adjusted in tightness to make the VR devices suitable for people with different head sizes. Specifically, VR devices usually include side straps and front and back straps. The side straps are used to fit the sides of the head, and the front and back straps are used to fit the top of the head, so as to fix the VR device on the head.

[0004] In the prior art, the side straps and front and rear straps of VR devices are independent of each other, and usually only one of the side straps and the front and rear straps can be adjusted; that is, the side straps usually cannot be adjusted in tightness, and only the front and rear straps can be adjusted in tightness; or the front and rear straps cannot be adjusted in tightness, and only the side straps can be adjusted in tightness. As a result, when a user wears a VR device, they cannot adjust the tightness of different parts of the head more comfortably, making the VR device unable to be more widely applicable to different groups of people.

[0005] In summary, how to provide a strap adjustment device with a wider range of applications is a technical issue that technicians in this field need to consider. Summary of the invention

[0006] The purpose of the present invention is to provide a head mounted display device and a strap adjustment device thereof, wherein the strap adjustment device has a wider application range and is more comfortable for users to wear.

[0007] To achieve the above-mentioned object, the present invention provides a strap adjustment device, comprising a support assembly provided with a through hole, a rotating assembly matched with the through hole, two side straps connected to the rotating assembly, a trigger assembly provided on the support assembly and used to be triggered by the rotating assembly, and front and rear straps that can be fixed relative to the trigger assembly;

[0008] When the rotating assembly rotates toward different directions relative to the through hole, the two side straps extend and retract relative to the supporting assembly;

[0009] When the rotating assembly moves in the axial direction of the through hole and triggers the trigger assembly, the trigger assembly loosens or clamps the front and rear straps.

[0010] Preferably, the trigger component comprises:

[0011] A sensing portion for contacting the rotating component;

[0012] A fitting part for tightly fitting with the front and rear straps to clamp the front and rear straps;

[0013] An execution part connected with the sensing part and the fitting part, and used for controlling the fitting part to loosen or clamp the front and rear straps when the sensing part is triggered by the rotating assembly.

[0014] Preferably, the fitting portion includes a pressing plate close to the supporting assembly and a pressing cover away from the supporting assembly, one end of the front and rear straps is located between the pressing plate and the pressing cover, and there is a clamping force between the pressing plate and the pressing cover for clamping the front and rear straps.

[0015] Preferably, the sensing part is specifically a pressure sensor, the execution part includes an electromagnet, and the pressing plate is specifically a metal pressing plate that can be attracted by the electromagnet to loosen the front and rear straps;

[0016] When the pressure sensor is subjected to the pressure of the rotating component, the pressure sensor sends out a pressure signal to enable the electromagnet to generate magnetism, and the metal pressing plate is attracted by the electromagnet and moves toward the direction of the electromagnet, and the metal pressing plate relaxes the front and rear straps.

[0017] Preferably, the sensing part is specifically a pressure sensor, the execution part includes an electromagnet and a magnet that can be attracted by the electromagnet, the pressing plate is specifically a plastic pressing plate, and the magnet is arranged on the plastic pressing plate;

[0018] When the pressure sensor is subjected to the pressure of the rotating component, the pressure sensor sends out a pressure signal to enable the electromagnet to generate magnetism, the magnet is attracted by the electromagnet, and both the magnet and the plastic pressing plate move toward the direction of the electromagnet, and the metal pressing plate relaxes the front and rear straps.

[0019] Preferably, the rotating assembly comprises a knob and a gear for rotating under the rotation of the knob, and the two side straps are provided with teeth for meshing with the gear;

[0020] When the knob is rotated in different directions, the two side straps and the gear move synchronously, and the two side straps extend and retract relative to the support assembly.

[0021] Preferably, the knob includes an annular body and a rotating shaft and an installing shaft which are arranged on the inner side of the annular body and extend along the axial direction of the through hole. The end of the rotating shaft close to the supporting assembly is used to trigger the triggering assembly. The installing shaft is arranged on the outer periphery of the rotating shaft. The end of the installing shaft close to the supporting assembly is provided with a claw for engaging with the supporting assembly; the gear is provided with a installing through hole for the installing shaft sleeve.

[0022] Preferably, the knob also includes a circumferential stopper arranged between the mounting shaft and the annular body; a clamping arm for cooperating with the circumferential stopper is fixedly provided on the end surface of the gear away from the front and rear straps to realize the rotation of the gear under the rotation of the knob.

[0023] Preferably, the clamp arm is provided with a first matching portion, the support assembly is provided with a second matching portion for matching with the first matching portion, and the first matching portion can rotate unidirectionally relative to the second matching portion;

[0024] When the knob drives the gear to rotate in the first direction, friction force is generated between the first matching portion and the second matching portion;

[0025] When the knob drives the gear to rotate in the second direction, the first matching portion and the second matching portion are out of contact.

[0026] Preferably, the knob further comprises a first annular portion disposed inside the annular body, and the support assembly comprises a second annular portion for cooperating with the first annular portion, so that when the rotating shaft triggers the trigger assembly, the first annular portion and the second annular portion cooperate with each other to prevent the knob from rotating relative to the support assembly. Preferably, the support assembly comprises a retaining ring located in the circumference of the through hole, the second annular portion and the second matching portion are located on a side of the retaining ring away from the side strap, and the gear is located on a side of the retaining ring close to the side strap.

[0027] Preferably, the support assembly includes a back cover, a first bracket connected to the back cover to form a accommodating cavity for accommodating the side straps, and a second bracket connected to the first bracket for installing the trigger assembly; the back cover is provided with a second annular portion, a second matching portion and a retaining ring, and the back cover, the first bracket and the second bracket are provided with through holes for forming a through hole.

[0028] Preferably, the rotating shaft is longer than the claw, and the claw is used to be clamped in the through hole of the first bracket.

[0029] Preferably, an elastic gasket is provided on the circumference of the second annular portion, and the elastic gasket is abutted between the annular body and the supporting assembly.

[0030] Preferably, it also includes a limiting washer disposed between the first bracket and the second bracket for fixing the relative positions of the first bracket and the second bracket.

[0031] Preferably, it also includes an elastic layer disposed on the back cover for accommodating the first bracket, the second bracket and the trigger assembly.

[0032] The present invention also provides a head mounted display device, comprising any one of the strap adjustment devices described above.

[0033] Compared with the above background technology, the strap adjustment device provided by the present invention includes a support component, a rotating component, a trigger component, front and rear straps and two side straps. The support component is provided with a through hole, wherein the rotating component can rotate relative to the through hole, and the rotating component can also move in the axial direction of the through hole; the rotating component is connected to the two side straps, and when the rotating component rotates, the two side straps extend and retract relative to the support component; the trigger component is used to fix the front and rear straps, and the trigger component is triggered by the rotating component; when the front and rear straps need to be adjusted, the rotating component is controlled to move in the axial direction of the through hole. Once the trigger component is triggered by the rotating component, the trigger component loosens the front and rear straps and adjusts the positional relationship of the front and rear straps relative to the support component. Taking the strap adjustment device worn on the head as an example, the two side straps are used to fit the two sides of the head, and the front and rear straps are used to fit the top of the head. With such a configuration, the two side straps and the front and rear straps can be adjusted respectively by utilizing the above two different operating modes of the rotating assembly; the first mode: when the rotating assembly rotates relative to the through hole, the positions of the two side straps relative to the supporting assembly can be adjusted; the second mode: the rotating assembly moves in the axial direction of the through hole, and the positions of the front and rear straps relative to the supporting assembly can be adjusted. It can be seen that the position adjustment of the two side straps and the front and rear straps relative to the supporting assembly can be completed only by controlling the operating mode of the rotating assembly, which greatly simplifies the adjustment process, making the adjustment process simple and quick, and the setting method of the strap adjustment device is relatively simple, which helps to reduce production costs and improve product competitiveness.

[0034] The present invention also provides a head mounted display device having the above-mentioned beneficial effects, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the overall structure of a strap adjustment device provided by an embodiment of the present invention;

[0037] Figure 2 for Figure 1 A schematic diagram from another angle;

[0038] Figure 3 for Figure 2 Side view of

[0039] Figure 4 for Figure 1 Exploded view of the components except the side straps;

[0040] Figure 5 for Figure 3 Schematic cross-sectional view of ;

[0041] Figure 6 for Figure 4 Schematic diagram of the structure of the knob;

[0042] Figure 7 for Figure 6 A schematic diagram of the middle knob from another angle;

[0043] Figure 8 for Figure 4 A schematic diagram of the structure of the gear and the clamp arm;

[0044] Fig. 9 for Figure 4 A schematic diagram of the structure of the back cover;

[0045] Fig.10 for Fig. 9 A schematic diagram of the via hole on the middle back cover from another angle;

[0046] Fig.11 for Figure 4 Schematic diagram of the knob, gear, clamp arm, back cover and side straps after they are matched;

[0047] Fig.12 for Figure 4 A schematic diagram of the structure of the pressing plate, the pressing cover and the elastic part;

[0048] Fig.13 for Fig.12 Schematic diagram of the middle pressure plate, pressure cover and elastic part after installation;

[0049] Fig.14 for Figure 4 A schematic diagram of a first arrangement method between the second bracket, the pressure plate and the electromagnet in FIG.

[0050] Fig.15 for Figure 4 Schematic diagram of a second arrangement between the second bracket, the pressure plate and the electromagnet. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] To enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] It should be noted in advance that the "provided on..." involved in this article does not mean that one component is located above another component, that is, there is no positional limitation relationship between the two components, but only indicates the connection relationship between the two components; in other words, the "on" in "provided on..." is an auxiliary word in modern Chinese, a special function word without real meaning, which does not reflect the positional relationship and only exists for the smoothness of the sentence.

[0054] A strap adjusting device provided by the present invention includes a support assembly, a rotating assembly, a triggering assembly, a front and rear strap 8, and two side straps 4. Refer to the attached drawings of the specification Figure 1 to Figure 5 and Fig.11 as shown.

[0055] The support assembly is provided with a through hole, and the support assembly can be arranged in an arc shape; according to the different wearing positions of the strap adjusting device, the support assembly can fit different parts of the human body, such as the head, and can also fit body parts such as the wrist or arm; for the convenience of description below, the case where the strap adjusting device is worn on the head will be taken as an example for explanation; of course, this does not mean that the strap adjusting device is only used for wearing on the head; when the strap adjusting device is worn on other parts of the human body, the front and rear strap 8 and the two side straps 4 can fit different parts of the body according to actual needs, which will not be elaborated in the following text.

[0056] The rotating assembly cooperates with the through hole of the support assembly. Specifically, the rotating assembly can rotate relative to the through hole, and the rotating assembly can also move in the axial direction of the through hole; that is, the rotating assembly has two operating modes relative to the support assembly. The first one: the rotating assembly rotates relative to the through hole, that is, the rotating assembly rotates relative to the through hole and the support assembly; the second one: the rotating assembly moves in the axial direction of the through hole, and it can be considered that the rotating assembly approaches or moves away from the through hole and the support assembly.

[0057] The support assembly can be regarded as the installation reference of the strap adjusting device, and the rotating assembly, the triggering assembly, the front and rear strap 8, and the two side straps 4 are all installed on the support assembly; the shape and structure of the front and rear strap 8 can be referred to the attached drawings of the specification Figure 1 to Figure 4 , the front and rear strap 8 is in an arc shape, with both ends low and the middle high. One end of the front and rear strap 8 is fixed relative to the support assembly, and the other end is suspended; the front and rear strap 8 should have a certain elasticity to fit the top of the head. The general shape and structure of the two side straps 4 can be referred to the attached drawings of the specification Fig.11, the two side straps 4 are located on both sides of the head, the two side straps 4 are independent of each other and are not directly connected, the two side straps 4 should have a certain elasticity to fit on both sides of the head; the two side straps 4 are installed on the support assembly, and the two side straps 4 can be fixed relative to the support assembly. The support assembly is used to fit the head, and the front and rear straps 8, the support assembly and the two side straps 4 are respectively fitted at different positions of the head, thereby realizing that the strap adjustment device is worn on the head. The specific shape and structure of the support assembly can be determined according to actual needs, for example, it can be set as a cavity or other structure. A specific implementation method will be given below.

[0058] The rotating assembly is connected to the two side straps 4. In the first operating mode of the rotating assembly, when the rotating assembly rotates in different directions relative to the through hole, the two side straps 4 extend and retract relative to the supporting assembly to adjust the force applied to the head; specifically, when the rotating assembly rotates in a first direction relative to the through hole, the two side straps 4 extend relative to the supporting assembly; obviously, when the rotating assembly rotates in a second direction relative to the through hole, the two side straps 4 retract relative to the supporting assembly, the first direction and the second direction are opposite, the first direction can be clockwise, and the second direction should be counterclockwise; when the first direction is counterclockwise, the second direction should be clockwise.

[0059] Instructions attached Fig.11 The invention shows a connection method of a rotating assembly and two side straps 4. The rotating assembly includes a knob 1 and a gear 2. The knob 1 is located on the outside of the support assembly. The knob 1 is located on the side of the support assembly away from the head for hand adjustment. The gear 2 and the two side straps 4 are closer to the head than the knob 1. Figure 1 To Attachment Figure 3 The gear 2 and the two side straps 4 can be wrapped by the support component, or the gear 2 and the two side straps 4 can be located on the side of the support component close to the head. Regardless of the arrangement, the outer side of the support component (the side away from the head) only exposes the knob 1.

[0060] The knob 1 and the gear 2 rotate synchronously. The two can be connected by a fixed method such as bolts in the prior art. When the hand rotates the adjustment knob 1, the knob 1 and the gear 2 rotate synchronously. The two side straps 4 are provided with teeth 41. The gear 2 and the teeth 41 of the two side straps 4 are meshed. The teeth 41 of the two side straps 4 are respectively located on the radial sides of the gear 2. When the gear 2 rotates in different directions, the two side straps 4 extend and retract relative to the support assembly. Fig.11When the knob 1 is rotated counterclockwise, the gear 2 rotates counterclockwise, and the teeth 41 of the side strap 4 at the left end moves to the right, and the side strap 4 at the left end retracts relative to the support assembly; the teeth 41 of the side strap 4 at the right end moves to the left, and the side strap 4 at the right end retracts relative to the support assembly; similarly, when the knob 1 is rotated clockwise, the two side straps 4 extend relative to the support assembly, and the specific movement process is similar to the above, which will not be repeated in this article.

[0061] The above only gives one connection method between the rotating component and the two side straps 4. Those skilled in the art will know that in order to realize the conversion of rotational motion into horizontal motion (the rotational motion of the rotating component is converted into the horizontal motion of the two side straps 4), there are many optional mechanisms, such as worm gears, screw mechanisms and connecting rod structures, which will not be elaborated in this article.

[0062] In the second operating mode of the above-mentioned rotating assembly, the rotating assembly moves in the axial direction relative to the through hole of the supporting assembly, and the trigger assembly is triggered by the rotating assembly moving in the axial direction, so that the trigger assembly loosens or clamps the front and rear straps 8, adjusts the tension applied to the front and rear of the head, that is, adjusts the tightness of the front and rear of the head.

[0063] Specifically, the support assembly is provided with a trigger assembly, and the trigger assembly can be wrapped by the support assembly, or the trigger assembly is located on the side of the support assembly close to the head, and the trigger assembly is used to fix the front and rear straps 8; the front and rear straps 8 can be fixed to the inner side surface of the support assembly (the side that fits the head), and the fixation between the front and rear straps 8 and the support assembly is achieved through the trigger assembly; when the trigger assembly is not triggered by the rotating assembly, the trigger assembly maintains the clamping of the front and rear straps 8, and at this time the front and rear straps 8 are fixed relative to the trigger assembly and the support assembly, so as to realize the wearing of the strap adjustment device on the head; when the trigger assembly is triggered by the rotating assembly, the trigger assembly relaxes the front and rear straps 8, and at this time the front and rear straps 8 can be displaced relative to the trigger assembly and the support assembly to adjust the tightness of the head front and back; of course, when the trigger assembly is triggered by the rotating assembly, the trigger assembly moves relative to the support assembly to realize the relaxation of the front and rear straps 8 by the trigger assembly.

[0064] In the above process, pressing the rotating component can be used as a condition for loosening the front and rear straps 8, and pressing the rotating component can also be used as a condition for clamping the front and rear straps 8; of course, correspondingly, when pressing the rotating component can realize the trigger component to loosen the front and rear straps 8, in order to realize the trigger component to clamp the front and rear straps 8, the rotating component needs to be moved toward the outside of the supporting component; similarly, when pressing the rotating component can realize the trigger component to clamp the front and rear straps 8, in order to realize the trigger component to loosen the front and rear straps 8, the rotating component needs to be moved toward the outside of the supporting component.

[0065] Based on practical considerations, the following will take "pressing the rotating component to trigger the component to loosen the front and rear straps 8" as an example for explanation, that is, when the rotating component is not touched, the trigger component should keep clamping the front and rear straps 8, and only when the rotating component is pressed can the position of the front and rear straps 8 relative to the support component be adjusted to achieve the front and back tightness of the head. However, this article will also protect the technical solution of "pressing the rotating component to trigger the component to clamp the front and rear straps 8", but this article will not expand on this solution simply because it is similar to the above solution.

[0066] The rotating component can be provided with an electronic button, and the trigger component can be set to a clamping and releasing claw controlled by the electronic button; when the rotating component is not pressed, the trigger component is not triggered by the electronic button, and the trigger component maintains an initial state at this time, and the initial state of the trigger component can be set to a state of clamping the front and rear straps 8; when the rotating component is pressed and the rotating component moves in the axial direction of the through hole, once the electronic button of the rotating component touches the trigger component, the trigger component releases the clamping claw, and the front and rear straps 8 can move relative to the supporting component, thereby adjusting the front and rear tightness of the head; after the position of the front and rear straps 8 relative to the supporting component is adjusted, the rotating component is released, and the rotating component can return to its original position under the action of elastic components such as springs, so that the electronic button and the trigger component are disengaged, and the trigger component that is not touched by the electronic button remains in a clamping state, clamping the front and rear straps 8, so that the front and rear straps 8 are maintained in the adjusted position.

[0067] Of course, the specific configuration of the rotating assembly and the trigger assembly may be other, and a specific implementation will be given below.

[0068] Reference Manual Attached Figure 4 and attached Figure 5 The trigger assembly includes a sensing part 5, a fitting part and an execution part. The sensing part 5 is fixed relative to the support assembly, and the sensing part 5 and the support assembly can be fixedly connected by a method such as gluing in the prior art.

[0069] Regarding the situation of "pressing the rotating component to trigger the component to loosen the front and rear straps 8", when the trigger component clamps the front and rear straps 8, there is a certain gap between the sensing part 5 and the rotating component, and there is no contact between the two, that is, the sensing part 5 is not triggered by the rotating component; when it is necessary to adjust the positional relationship of the front and rear straps 8 relative to the supporting component, when the rotating component moves in the axial direction of the through hole, the rotating component gradually approaches the sensing part 5, and when the rotating component and the sensing part 5 are in contact, the sensing part 5 is triggered.

[0070] The fitting part is used to clamp the front and rear straps 8, refer to the instructions for Figure 1 To Attachment Figure 3The front and rear straps 8 have two specific ends, and the fitting part is used to clamp one of the ends of the front and rear straps 8, and the other end of the front and rear straps 8 is suspended; the front and rear straps 8 have a front side and a back side, the front side of the front and rear straps 8 is far away from the head and does not fit the head, and the back side of the front and rear straps 8 fits the head. The fitting part clamps the front and rear straps 8, that is, the front and back sides of the front and rear straps 8 fit with different positions or parts of the fitting part respectively, so that the front and rear straps 8 are located between the fitting parts, and the fitting part clamps the front and rear straps 8.

[0071] There is a connection relationship between the execution part and the sensing part 5, which can be an electrical connection or a mechanical connection, etc. There is also a connection relationship between the execution part and the fitting part, which can be an electrical connection or a mechanical connection, etc. When the sensing part 5 is triggered by the rotating assembly, the execution part controls the fitting part to loosen or clamp the front and rear straps 8.

[0072] As mentioned above, this article uses pressing the rotating component to trigger the component to relax the front and rear straps 8 as an example for explanation, that is, the following description will continue according to "when the sensing part 5 is triggered by the rotating component, the execution part controls the fitting part to relax the front and rear straps 8".

[0073] The sensing part 5 can be set as a control button, the fitting part can be set as two clamps, and the two clamps are respectively located on the front and back sides of the front and rear straps 8, and the execution part can be set as an execution mechanism such as a control motor that controls the movement of the two clamps.

[0074] When the two clamps clamp the front and rear straps 8, the control button is not triggered by the rotating assembly. At this time, the two clamps continue to maintain the clamping state, so that the position of the front and rear straps 8 relative to the support assembly is fixed; when the position relationship of the front and rear straps 8 relative to the support assembly needs to be adjusted, the rotating assembly moves in the axial direction of the through hole, and the control button is triggered by the rotating assembly. At this time, the control button sends a signal to the actuator, and the actuator starts to operate after receiving the signal. Since the actuator is connected to the two clamps, the operation of the actuator causes the two clamps to move toward each other, loosening the front and rear straps 8, and the front and rear straps 8 can adjust their positions relative to the support assembly. After the front and rear straps 8 are adjusted, the rotating assembly can be controlled to move in a direction away from the control button. After the rotating assembly and the control button are out of contact, the control button stops sending signals to the actuator, and the actuator that has not received the signal moves to the initial state. The two clamps clamp the front and rear straps 8 during the process of the actuator moving to the initial state.

[0075] Of course, the specific configuration of the sensing part 5, the fitting part and the execution part may be other, which will be explained in detail below.

[0076] Reference Manual Attached Figure 4 , Attachment Figure 5 , Attachment Fig.12 and attached Fig.13 The fitting part includes a pressing plate 7 and a pressing cover 9, the pressing plate 7 is close to the supporting assembly, and the pressing cover 9 is far away from the supporting assembly; the pressing plate 7 fits with the front side of the front and rear straps 8, and the pressing cover 9 fits with the back side of the front and rear straps 8.

[0077] There is a clamping force between the pressing plate 7 and the pressing cover 9 to clamp the front and rear straps 8. The pressing plate 7 and the pressing cover 9 are both generally plate-shaped, and the specific shapes and structures of the pressing plate 7 and the pressing cover 9 can be determined according to actual needs.

[0078] When the pressing plate 7 and the pressing cover 9 clamp the front and rear straps 8, the positions of the front and rear straps 8 relative to the support assembly are fixed; when the positions of the front and rear straps 8 relative to the support assembly need to be adjusted, the sensing unit 5 is triggered by the rotating unit, and at this time, the sensing unit 5 sends a signal to the execution unit, which controls the pressing plate 7 and the pressing cover 9 to move toward each other on the premise of overcoming the clamping force between the pressing plate 7 and the pressing cover 9, and the pressing plate 7 and the pressing cover 9 release the front and rear straps 8, so that the front and rear straps 8 can be adjusted relative to the support assembly. After the position adjustment of the front and rear straps 8 is completed, the rotating unit does not contact the sensing unit 5, and the sensing unit 5 stops sending signals to the execution unit. The execution unit that does not receive the signal cannot control the pressing plate 7 and the pressing cover 9 to move toward each other, and the pressing plate 7 and the pressing cover 9 approach each other under the action of the clamping force, thereby clamping the front and rear straps 8.

[0079] Reference Manual Attached Fig.12 and attached Fig.13 In order to achieve a clamping force between the pressure plate 7 and the pressure cover 9, a spring 19 can also be provided. The spring 19 provides a clamping force to ensure that the pressure plate 7 and the pressure cover 9 clamp the front and rear straps 8; specifically, the four top corners of the pressure plate 7 are provided with fixed blocks 71, and the two sides of the pressure cover 9 are provided with curling edges 92. Two limiting ribs 91 are provided between the two curling edges 92. The limiting rib 91 is a continuous protruding structure. A curling edge 92 and a limiting rib 91 form a group of limiting structures. The pressure cover 9 has two groups of limiting structures. Each group of limiting structures accommodates two fixed blocks 71 in the vertical direction to achieve the installation of the pressure plate 7 and the pressure cover 9.

[0080] Instructions attached Fig.12The shown orientation is for reference only. The pressure cover 9 has two sets of left and right limiting structures. The limiting structure on the right side is used to accommodate the two fixed blocks 71 at the right end of the pressure plate 7; the limiting structure on the left side and the two fixed blocks 71 at the left end of the pressure plate 7 are connected to the spring 19. The two fixed blocks 71 at the left end of the pressure plate 7 are provided with mounting holes for mounting the upper and lower ends of the spring 19. A clamping portion is also provided on the left side of the pressure cover 9. The clamping portion is located between the two fixed blocks 71 at the left end of the pressure plate 7 to limit the up and down movement of the pressure plate 7 and the pressure cover 9; that is, when the pressure plate 7 and the pressure cover 9 are installed, the limiting structure prevents the pressure plate 7 and the pressure cover 9 from moving left and right, and uses the clamping portion and the two fixed blocks 71 to limit the up and down movement of the pressure plate 7 and the pressure cover 9. The clamping part of the gland 9 is provided with spring limiting holes penetrating the upper and lower ends, the upper and lower ends of the spring 19 are respectively mounted on the two fixing blocks 71, and the middle section of the spring 19 is mounted on the spring limiting holes. The spring 19 is used to connect the pressure plate 7 and the gland 9, and the spring 19 is elastic, so that the pressure plate 7 and the gland 9 maintain a clamping force. Of course, the setting method for maintaining the clamping force between the pressure plate 7 and the gland 9 can also refer to the existing technology, which will not be repeated in this article.

[0081] Regarding the specific configuration of the sensing unit 5 and the execution unit, this article provides the following two specific implementation methods; the first one: refer to the attached manual Figure 4 , Attachment Figure 5 and attached Fig.14 The sensing part 5 can be set as a pressure sensor, the execution part includes an electromagnet 6, the pressure plate 7 is a metal pressure plate, the pressure sensor, the pressure cover 9 and the electromagnet 6 are fixed relative to the support assembly, and the electromagnet 6 is closer to the support assembly than the pressure plate 7. The metal pressure plate can be attracted by the electromagnet 6, and the attracted metal pressure plate moves in a direction away from the pressure cover 9, thereby loosening the clamping of the front and rear straps 8.

[0082] When the strap adjustment device needs to be worn on the head, the front and rear straps 8 are fixed relative to the support assembly. At this time, the pressure plate 7 and the pressure cover 9 clamp the front and rear straps 8 under the action of the clamping force; when the position of the front and rear straps 8 relative to the support assembly needs to be adjusted, the rotating assembly moves in the axial direction of the through hole. Once the rotating assembly contacts the pressure sensor, the pressure sensor generates an electrical signal, which can be transmitted to the electromagnet 6 through a circuit board such as a PCB. The electromagnet 6 that receives the electrical signal is magnetic and generates an attractive force. The metal pressure plate moves toward the direction of the electromagnet 6 under the action of the attractive force of the electromagnet 6. During the movement, the metal pressure plate overcomes the clamping force between the pressure plate 7 and the pressure cover 9; obviously, the attractive force generated by the electromagnet 6 should be greater than the clamping force between the pressure plate 7 and the pressure cover 9; that is, the electromagnet 6, the pressure plate 7 and the pressure cover 9 are sequentially arranged in the direction away from the support assembly, and the pressure plate 7 is located between the electromagnet 6 and the pressure cover 9.

[0083] When the pressure sensor is not touched by the rotating component, the pressure sensor will not generate an electrical signal. The electromagnet 6 that does not receive the electrical signal has no magnetism and will not generate attraction. At this time, the metal pressure plate will not be attracted by the electromagnet 6. Under the action of the clamping force, the metal pressure plate moves toward the direction close to the pressure cover 9 and away from the electromagnet 6. The metal pressure plate and the pressure cover 9 clamp the front and rear straps 8; since the position of the pressure cover 9 is fixed relative to the support assembly, the position of the metal pressure plate, the front and rear straps 8 and the pressure cover 9 are fixed relative to the support assembly.

[0084] The second type: refer to the instruction manual Figure 4 , Attachment Figure 5 and attached Fig.15 , the sensing part 5 can be set as a pressure sensor, the execution part includes an electromagnet 6 and a magnet 61, the pressing plate 7 is a plastic pressing plate, the pressure sensor, the pressure cover 9 and the electromagnet 6 are fixed relative to the support assembly, and the magnet 61 can be fixed to the pressing plate 7 by means of screws, etc., the magnet 61 is farther away from the front and rear straps 8 than the pressing plate 7, and the magnet 61 is closer to the electromagnet 6; the electromagnet 6 is closer to the support assembly than the pressing plate 7. The magnet 61 can be attracted by the electromagnet 6, and the attracted magnet 61 drives the plastic pressing plate to move in a direction away from the pressure cover 9, thereby loosening the clamping of the front and rear straps 8.

[0085] Similar to the above, when the strap adjustment device needs to be worn on the head, the front and rear straps 8 are fixed relative to the support assembly. At this time, the pressure plate 7 and the pressure cover 9 clamp the front and rear straps 8 under the action of the clamping force; when the position of the front and rear straps 8 relative to the support assembly needs to be adjusted, the rotating assembly moves in the axial direction of the through hole. Once the rotating assembly contacts the pressure sensor, the pressure sensor generates an electrical signal, which can be transmitted to the electromagnet 6 through a circuit board such as a PCB. The electromagnet 6 that receives the electrical signal has magnetism and generates an attractive force. The magnet 61 moves toward the direction of the electromagnet 6 under the action of the attractive force of the electromagnet 6. The magnet 61 and the plastic pressure plate are fixedly connected, and the two move synchronously. During the movement, the clamping force between the pressure plate 7 and the pressure cover 9 is overcome; obviously, the attractive force generated by the electromagnet 6 should be greater than the clamping force between the pressure plate 7 and the pressure cover 9.

[0086] When the pressure sensor is not touched by the rotating component, the pressure sensor will not generate an electrical signal. The electromagnet 6 that does not receive the electrical signal has no magnetism and will not generate attraction. At this time, the magnet 61 will not be attracted by the electromagnet 6. Under the action of the clamping force, the plastic pressing plate drives the magnet 61 to move toward the direction close to the pressure cover 9 and away from the electromagnet 6. The plastic pressing plate and the pressure cover 9 clamp the front and rear straps 8; since the position of the pressure cover 9 is fixed relative to the support assembly, the position of the plastic pressing plate, the front and rear straps 8 and the pressure cover 9 are fixed relative to the support assembly.

[0087] In the above two specific embodiments, the contact surface between the pressure plate 7 and the front and rear straps 8 may also be provided with a wear-resistant layer 70 for increasing friction. The wear-resistant layer 70 may be specifically a film or a rough layer. Whether it is a metal pressure plate or a plastic pressure plate, the wear-resistant layer 70 may be integrally provided on the surface of the pressure plate 7, and the wear-resistant layer 70 may be determined according to the different materials of the pressure plate 7, which will not be elaborated in this article.

[0088] Reference Manual Attached Figure 5 The pressure sensor can be set to be flat, the electromagnet 6 is ring-shaped, and the pressure sensor is located in the middle of the electromagnet 6. The pressure sensor and the electromagnet 6 are fixed relative to the supporting assembly, and the rotating assembly can move relative to the supporting assembly. As for the contact position and contact part setting method of the rotating assembly and the pressure sensor, it can be determined according to actual needs. A specific setting method will be given below.

[0089] Reference Manual Attached Figure 4 To Attachment Figure 7 The knob 1 includes an annular body 10, a rotating shaft 11 and a mounting shaft 12. A plurality of contact grooves may be provided on the outer periphery of the annular body 10 for hand gripping; the rotating shaft 11 is located on the inner side of the annular body 10 and is perpendicular to the annular body 10. The rotating shaft 11 extends along the axial direction of the through hole. The rotating shaft 11 may be regarded as the rotation centerline of the knob 1.

[0090] The installation shaft 12 is located on the inner side of the annular body 10 and is perpendicular to the annular body 10. The installation shaft 12 extends along the axial direction of the through hole. The installation shaft 12 is located on the outer side of the rotating shaft 11. The number of the installation shafts 12 can be multiple and distributed around the circumference of the rotating shaft 11. The rotating shaft 11 and the installation shaft 12 can be integrally arranged.

[0091] Instructions attached Figure 6 and attached Figure 7 From the orientation shown, the bottom of the mounting shaft 12 is fixed to the rotating shaft 11, and the top of the mounting shaft 12 is suspended in the air. The top of the mounting shaft 12 can be moved closer to or farther away from the rotating shaft 11, that is, the tops of multiple mounting shafts 12 can be in a contracted or open state relative to the rotating shaft 11; a claw 120 is provided at the top of the mounting shaft 12, and the claw 120 is used to be engaged with the support assembly.

[0092] Strictly speaking, the top of the mounting shaft 12 is the end of the mounting shaft 12 close to the supporting assembly, and the end of the rotating shaft 11 close to the supporting assembly is used to contact the trigger assembly to trigger the trigger assembly; combined with the above embodiment, the end of the rotating shaft 11 close to the supporting assembly is used to contact the pressure sensor. When the pressure sensor is triggered by the end of the rotating shaft 11 close to the supporting assembly, the pressure sensor generates an electrical signal, and the electrical signal can be transmitted to the electromagnet 6 through a circuit board such as a PCB to perform subsequent operations, which will not be repeated in this article.

[0093] Reference Manual Attached Figure 8 The gear 2 is provided with a mounting through hole 21, and the mounting shaft 12 is sleeved inside the mounting through hole 21 to achieve the connection between the knob 1 and the gear 2; since the mounting shaft 12 has a certain elasticity, the tops of the multiple mounting shafts 12 can be in a contracted or expanded state relative to the rotating shaft 11, and the outer wall of the mounting shaft 12 fits with the inner wall of the mounting through hole 21 to limit the radial displacement of the gear 2 relative to the knob 1. Under the fitting effect of the mounting shaft 12 and the mounting through hole 21, the gear 2 and the knob 1 can move synchronously along the axial direction of the through hole of the support assembly.

[0094] The claw 120 extends outward, and the support assembly should be provided with a portion for the claw 120 to be engaged, which can be an engaging structure such as an engaging hole, etc., so as to achieve the fixing of the position of the knob 1 relative to the support assembly; of course, the claw 120 should not hinder the rotation and axial displacement of the knob 1 relative to the support assembly mentioned above; when there is no need to adjust the tightness on both sides and front and back of the head, the claw 120 and the engaging structure are engaged to achieve the fixing of the position of the knob 1 relative to the support assembly. The engaging structure can be set in a variety of ways, and specific embodiments are given below.

[0095] For knob 1, refer to the instruction manual. Figure 6 and attached Figure 7 The knob 1 also includes a connecting arm 13, which connects the mounting shaft 12 and the annular body 10. The connecting arm 13 is provided with a circumferential stopper 14. The gear 2 is fixed with a clamping arm 22, which is used to cooperate with the circumferential stopper 14 to prevent the gear 2 from rotating relative to the knob 1.

[0096] Reference Manual Attached Figure 4 and attached Figure 8 , the clamping arm 22 is arranged on the outer periphery of the gear 2, and the clamping arm 22 and the gear 2 are distributed along the extension direction of the rotating shaft 11, the gear 2 and the clamping arm 22 are fixedly connected, and the two move synchronously. The gear 2 and the clamping arm 22 can be an integrally formed structure. The clamping arm 22 includes a base 24 and an extension arm 26, the base 24 and the extension arm 26 are integrally arranged, the extension arm 26 is elastic, the base 24 has a broken edge 25 on the side close to the extension arm 26, the extension arm 26 gradually extends toward the outside of the gear 2 in the direction away from the base 24, and the extension arm 26 and the broken edge 25 form a clamping groove for placing the circumferential stopper 14. As shown in the attached manual Figure 7 and attached Figure 8 As shown, the extension arm 26 and the broken edge 25 are located in the circumference of the mounting through hole 21; they are located on the plane where the end face of the mounting through hole 21 is located, and the broken edge 25 extends in the radial direction of the mounting through hole 21. The extension arm 26 is not parallel to the broken edge 25, and the extension arm 26 gradually tilts in the direction away from the broken edge 25 toward the direction away from the mounting through hole 21. The extension arm 26 and the broken edge 25 form two ends of the slot, and the two side walls of the circumferential stopper 14 are respectively attached to the extension arm 26 and the broken edge 25.

[0097] Reference Manual Attached Figure 8 The clamp arm 22 is provided with a first matching portion 23, the first matching portion 23 is located at the end of the extension arm 26, the first matching portion 23 is in the shape of a ratchet, and the support assembly is provided with a second matching portion 32, as shown in the attached manual Fig.10 , the second matching portion 32 is in the shape of a gear ring. The first matching portion 23 and the second matching portion 32 can cooperate with each other; when there is no need to adjust the positional relationship of the two side straps 4 relative to the support assembly (that is, when there is no need to rotate the knob 1), the knob 1, the gear 2 and the clamp arm 22 should be stationary relative to the support assembly, and the first matching portion 23 is stationary relative to the second matching portion 32 by using the ratchet-shaped structure and a tooth of the gear ring to cooperate.

[0098] Instructions attached Figure 8 Taking the shown position as an example, when the knob 1, the gear 2 and the clamp arm 22 rotate counterclockwise relative to the supporting assembly, the knob 1 needs to be held and rotated counterclockwise, and the circumferential stopper 14 of the knob 1 rotates counterclockwise synchronously. Because one side wall of the circumferential stopper 14 fits against the broken edge 25, the gear 2 and the clamp arm 22 rotate synchronously with the knob 1.

[0099] When the clamp arm 22 rotates counterclockwise relative to the support assembly, the first matching portion 23 continues to rub against different teeth of the gear ring, that is, the first matching portion 23 rotates relative to the second matching portion 32, and during the rotation process, the first matching portion 23 always contacts the second matching portion 32;

[0100] In the above process, due to the relative movement between the first matching portion 23 and the second matching portion 32, the two continue to rub against each other, generating friction force, accompanied by the sound generated by the friction, so that the operator can sense the current rotation of the knob 1, which is conducive to precise adjustment. Fig.11 When the knob 1, the gear 2 and the clamp arm 22 rotate counterclockwise relative to the support assembly, the two side straps 4 retract relative to the support assembly.

[0101] Instructions attached Figure 8Taking the orientation shown as an example, when the knob 1 is rotated in the clockwise direction, since the extension arm 26 is not parallel to the broken edge 25, the extension arm 26 gradually tilts in the direction away from the broken edge 25 toward the direction away from the mounting through hole 21, and the extension arm 26 is elastic; when the knob 1 is rotated clockwise, the side wall of the circumferential stopper 14 and the extension arm 26 fit together act on the extension arm 26, so that the extension arm 26 moves toward the direction close to the gear 2, and the first matching portion 23 gradually disengages from the second matching portion 32, and no friction force is generated between the first matching portion 23 and the second matching portion 32. At this time, one side wall of the circumferential stopper 14 is out of contact with the broken edge 25, and the other side wall of the circumferential stopper 14 is still in contact with the extension arm 26 (although the extension arm 26 moves toward the direction close to the gear 2), and the first matching portion 23 disengages from the second matching portion 32. At this time, the knob 1 can drive the clamping arm 22 to rotate clockwise relative to the knob 1 support assembly. In conjunction with the attached manual Fig.11 When the knob 1, the gear 2 and the clamp arm 22 rotate clockwise relative to the support assembly, the two side straps 4 extend relative to the support assembly.

[0102] It can be seen that by rotating the knob 1 in different directions relative to the support assembly, the two side straps 4 can be extended and retracted relative to the support assembly at the same time; when the two side straps 4 are adjusted, the extension arm 26 moves in a direction away from the gear 2 under the action of elasticity, and the first matching portion 23 is clamped with the second matching portion 32 to fix the position of the gear 2 and the support assembly, ensuring that the two side straps 4 are in the current position relative to the support assembly. Figure 6 and attached Figure 7 The knob 1 also includes a first annular portion 15, which is located on the inner side of the annular body 10 and is wavy; the support assembly is provided with a second annular portion 31, as shown in the attached manual Fig.10 , the second annular portion 31 is concave-convex. The first annular portion 15 and the second annular portion 31 can be mutually locked. When there is no need to adjust the tightness of the two sides of the head (that is, when there is no need to rotate the knob 1), there is no contact between the first annular portion 15 and the second annular portion 31; when it is necessary to adjust the tightness of the two sides of the head (that is, when the knob 1 needs to be rotated), the knob 1 is rotated, and at this time, there is still no contact between the first annular portion 15 and the second annular portion 31. When it is necessary to adjust the tightness of the front and back of the head (when the knob 1 needs to be pressed), the knob 1 moves along the axial direction of the through hole. When the first annular portion 15 and the second annular portion 31 are in contact, the two are locked, and the first annular portion 15 and the second annular portion 31 cannot rotate relative to each other, that is, the tightness of the two sides of the head cannot be adjusted, and at this time, the rotating shaft 11 triggers the pressure sensor. After the pressure sensor is triggered by the end of the rotating shaft 11 close to the support assembly, the pressure sensor generates an electrical signal, and the electrical signal can be transmitted to the electromagnet 6 through a circuit board such as a PCB to perform subsequent operations.

[0103] Reference Manual Attached Fig.10 The support assembly is provided with a retaining ring 33, which is located in the circumference of the through hole, the second annular portion 31 and the second matching portion 32 are located on the side of the retaining ring 33 away from the side strap 4, and the gear 2 is located on the side of the retaining ring 33 close to the side strap 4; that is, the first annular portion 15 of the knob 1 is located on the side of the retaining ring 33 away from the side strap 4, and the clamping arm 22 is also located on the side of the retaining ring 33 away from the side strap 4; the rotating shaft 11 and the mounting shaft 12 of the knob 1 pass through the through hole of the support assembly, and the gear 2 also passes through the through hole of the support assembly. Since the clamping arm 22 is located on the outside of the gear 2, the end face of the clamping arm 22 fits with the retaining ring 33, and the retaining ring 33 can be used to limit the axial position of the gear 2 and the clamping arm 22.

[0104] For support components, refer to the instruction manual. Figure 4 , including a first bracket 01, a second bracket 02 and a back cover 3. The first bracket 01 and the back cover 3 are connected to form a receiving cavity, and the receiving cavity accommodates the side strap 4, as shown in the attached manual. Fig.11 Among them, the first bracket 01, the second bracket 02 and the rear cover 3 can be connected by bolts or the like in the prior art to achieve fixation of the three.

[0105] The back cover 3 is provided with a back cover through hole 30, which is a part of the through hole of the support assembly. The second annular portion 31, the second matching portion 32 and the retaining ring 33 are provided on the back cover 3, the rotating shaft 11 and the mounting shaft 12 of the knob 1 pass through the back cover through hole 30, and the gear 2 also passes through the back cover through hole 30; the two side straps 4 are meshed with the gear 2, and the two side straps 4 and the clamp arm 22 are respectively located on different sides of the back cover 3.

[0106] The second bracket 02 is mounted on the first bracket 01. The second bracket 02 is provided with a trigger assembly. The first bracket 01 and the second bracket 02 have bracket through holes. The rear cover through hole 30 and the two bracket through holes form a through hole of the support assembly. The pressure sensor is provided at the through hole of the second bracket 02. The pressure sensor and the electromagnet 6 are fixed to one side of the second bracket 02 close to the front and rear straps 8.

[0107] Reference Manual Attached Figure 5 and attached Fig.11 It can be seen that the rotating shaft 11 of the knob 1 passes through the back cover through hole 30, the mounting through hole 21 of the gear 2 and the through hole of the first bracket 01 in sequence, and the rotating shaft 11 can touch the pressure sensor located at the through hole of the second bracket 02 during the movement along the axial direction of the through hole, thereby realizing the above function.

[0108] Reference Manual Attached Figure 5 and attached Figure 7, the length of the rotating shaft 11 is greater than the length of the claw 120; when the knob 1 is mounted on the rear cover 3, the rotating shaft 11 is closer to the front and rear straps 8 than the claw 120, so that the rotating shaft 11 can touch the pressure sensor without the knob 1 moving a large distance. The claw 120 is used to snap into the through hole of the first bracket 01, and here, the through hole of the first bracket 01 is the snap-on structure of the support assembly described above.

[0109] During the installation process, the claw 120 passes through the back cover through hole 30 and the installation through hole 21 of the gear 2 in sequence. When it is necessary to pass through the through hole of the first bracket 01, the claw 120 moves in the direction close to the rotation axis 11, that is, the claw 120 contracts relative to the rotation axis 11, so as to achieve the claw 120 passing through the through hole of the first bracket 01. After the claw 120 passes through the through hole of the first bracket 01, it returns to its original shape under the elastic action of the claw 120 itself. At this time, the claw 120 is clamped around the through hole of the first bracket 01, and the knob 1 is fixed to the first bracket 01.

[0110] Instructions attached Figure 5 In the figure, the knob 1 is in a pressed state, and the pressure plate 7 has not yet been separated from the contact with the front and rear straps 8. It can be seen that at this time, the rotating shaft 11 of the knob 1 touches the sensing part 5 (pressure sensor), and the claw 120 is separated from the clamping connection with the first bracket 01, the claw 120 is not clamped with the first bracket 01, and the claw 120 is closer to the side of the front and rear straps 8 than the first bracket 01.

[0111] Reference Manual Attached Fig.14 and attached Fig.15 An elastic part 29 is provided between the second bracket 02 and the pressure plate 7 for maintaining the clamping force of the pressure plate 7 and the pressure cover 9; as mentioned above, when it is necessary to adjust the position of the front and rear straps 8 relative to the supporting assembly, the rotating shaft 11 of the knob 1 touches the sensing part 5 (pressure sensor), and the pressure sensor generates an electrical signal, which can be transmitted to the electromagnet 6 through a circuit board such as a PCB. The electromagnet 6 that obtains the electrical signal has magnetism and generates an attractive force. At this time, whether it is the metal pressure plate or the magnet 61, when it moves toward the direction of the electromagnet 6 under the action of the attractive force, it is necessary to overcome the clamping force between the pressure plate 7 and the pressure cover 9 while also overcoming the elastic force of the elastic part 29, so that the pressure plate 7 can move toward the second bracket 02 and the front and rear straps 8 can be relaxed.

[0112] When the pressure sensor is not touched by the rotating shaft 11, the pressure sensor will not generate an electrical signal. The electromagnet 6 that does not receive an electrical signal has no magnetism and will not generate attraction. At this time, the metal pressure plate or magnet 61 that is not attracted by the electromagnet 6 will not be attracted by the electromagnet 6. Under the action of the elastic part 29, the pressure plate 7 moves in a direction away from the second bracket 02, thereby achieving the position fixation of the pressure plate 7, the front and rear straps 8 and the pressure cover 9 relative to the support assembly. Among them, the elastic part 29 can be set as a spring or other components, which will not be repeated in this article.

[0113] Reference Manual Attached Figure 4 and attached Fig.10 An elastic gasket 34 is provided on the circumference of the second annular portion 31, and the elastic gasket 34 is against the annular body 10 and the supporting assembly; specifically, the rear cover 3 is provided with a baffle 35, the baffle 35 is located on the outer periphery of the second annular portion 31, and a groove 36 is provided between the baffle 35 and the second annular portion 31, and the elastic gasket 34 is provided in the groove 36; under the action of the baffle 35, the elastic gasket 34 is fixed relative to the second annular portion 31. Obviously, when the elastic gasket 34 is installed in the groove 36, the height of the elastic gasket 34 should be higher than the height of the enclosure 35, and the upper end surface of the elastic gasket 34 should be against the annular body 10 of the knob 1; that is, the relative position relationship between the knob 1 and the back cover 3 is maintained by the elastic gasket 34; when it is necessary to press the knob 1 to adjust the position of the front and rear straps 8 relative to the support assembly, the elastic force of the elastic gasket 34 should be overcome, the first annular portion 15 and the second annular portion 31 are against each other, and the knob 1 cannot rotate relative to the back cover 3; at this time, when the adjustment is completed, stop pressing the knob 1, and the knob 1 moves in the direction away from the back cover 3 under the action of the elastic gasket 34, thereby realizing the automatic return of the knob 1.

[0114] Reference Manual Attached Figure 4 A limiting washer 03 may also be provided between the first bracket 01 and the second bracket 02, and the limiting washer 03 is used to fix the relative position between the first bracket 01 and the second bracket 02; as described above, when the knob 1 is in a pressed state, the rotating shaft 11 of the knob 1 touches the sensing part 5 (pressure sensor), and the claw 120 is disengaged from the engagement with the first bracket 01, and the claw 120 is not engaged with the first bracket 01. At the moment when the claw 120 is disengaged from the first bracket 01, the force on the first bracket 01 changes, and the limiting washer 03 is provided between the first bracket 01 and the second bracket 02, which can alleviate the local deformation and local displacement caused by the change in the force on the first bracket 01, thereby ensuring the structural reliability of the support assembly.

[0115] The strap adjustment device may also include an elastic layer 04, which is connected to the back cover 3 to accommodate the first bracket 01, the second bracket 02 and the trigger component; in short, the elastic layer 04 is in contact with the head. In order to relieve the pressure on the head, the elastic layer 04 covers the first bracket 01, the second bracket 02 and the trigger component to prevent hard objects from directly contacting the head, thereby improving the user experience. The elastic layer 04 can be set as a flexible material layer such as a fabric layer and a sponge layer.

[0116] The present invention provides a head-mounted display device provided with a strap adjustment device, including the strap adjustment device described in the above specific embodiment; as described above, the strap adjustment device can be worn on the head, and then the head-mounted display device can be worn on the head. Other parts of the head-mounted display device can refer to the existing technology and will not be elaborated in this article.

[0117] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0118] The head-mounted display device and the strap adjustment device provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A strap adjustment device, characterized in that: It comprises a support component provided with a through hole, a rotating component matched with the through hole, two side straps connected to the rotating component, a trigger component provided on the support component and used to be triggered by the rotating component, and front and rear straps (8) that can be fixed relative to the trigger component, wherein one end of the front and rear straps (8) is suspended in the air; When the rotating assembly rotates toward different directions relative to the through hole, the two side straps extend and retract relative to the supporting assembly; When the rotating assembly moves in the axial direction of the through hole and triggers the trigger assembly, the trigger assembly loosens or clamps the front and rear straps (8); The rotating assembly comprises a knob (1) and a gear (2) for rotating under the rotation of the knob (1), and the two side straps are provided with teeth (41) for meshing with the gear (2); when the knob (1) is rotated in different directions, the two side straps and the gear (2) move synchronously, and the two side straps extend and retract relative to the supporting assembly; The knob (1) comprises an annular body (10), and a rotating shaft (11) and a mounting shaft (12) arranged on the inner side of the annular body (10) and extending in the axial direction of the through hole. The rotating shaft (11) is arranged at one end close to the support assembly for triggering the trigger assembly. The mounting shaft (12) is arranged at the outer periphery of the rotating shaft (11). The mounting shaft (12) is arranged at one end close to the support assembly for engaging with the support assembly. The gear (2) is provided with a mounting through hole (21) for sleeve-mounting the mounting shaft (12). The knob (1) further comprises a circumferential stopper (14) arranged between the mounting shaft (12) and the annular body (10); a clamping arm (22) for cooperating with the circumferential stopper (14) is fixedly provided on the end surface of the gear (2) away from the front and rear straps (8), so as to realize driving the gear (2) to rotate under the rotation of the knob (1); the clamping arm (22) is provided with a first matching portion (23), and the supporting assembly is provided with a second matching portion (32) for cooperating with the first matching portion (23), and the first matching portion (23) can rotate unidirectionally relative to the second matching portion (32); when the knob (1) drives the gear (2) to rotate in a first direction, friction force is generated between the first matching portion (23) and the second matching portion (32); when the knob (1) drives the gear (2) to rotate in a second direction, the first matching portion (23) and the second matching portion (32) are out of contact; The knob (1) further comprises a first annular portion (15) arranged on the inner side of the annular body (10), and the support assembly is provided with a second annular portion (31) for cooperating with the first annular portion (15), so that when the rotating shaft (11) triggers the trigger assembly, the first annular portion (15) and the second annular portion (31) cooperate with each other to prevent the knob (1) from rotating relative to the support assembly.

2. The strap adjustment device according to claim 1, characterized in that: The trigger component comprises: A sensing portion (5) for contacting the rotating component; A fitting portion for tightly fitting with the front and rear straps (8) to clamp the front and rear straps (8); An execution unit connected to the sensing unit (5) and the fitting unit, and used for controlling the fitting unit to loosen or clamp the front and rear straps (8) when the sensing unit (5) is triggered by the rotating assembly.

3. The strap adjustment device according to claim 2, characterized in that: The fitting portion comprises a pressing plate (7) close to the supporting assembly and a pressing cover (9) away from the supporting assembly, one end of the front and rear straps (8) is located between the pressing plate (7) and the pressing cover (9), and a clamping force is provided between the pressing plate (7) and the pressing cover (9) for clamping the front and rear straps (8).

4. The strap adjustment device according to claim 3, characterized in that: The sensing part (5) is specifically a pressure sensor, the execution part includes an electromagnet (6), and the pressure plate (7) is specifically a metal pressure plate that can be attracted by the electromagnet (6) to loosen the front and rear straps (8); When the pressure sensor is subjected to pressure from the rotating assembly, the pressure sensor sends out a pressure signal to enable the electromagnet (6) to generate magnetism, and the metal pressure plate is attracted by the electromagnet (6) and moves in the direction of the electromagnet (6), and the metal pressure plate loosens the front and rear straps (8).

5. The strap adjustment device according to claim 3, characterized in that: The sensing part (5) is specifically a pressure sensor, the execution part comprises an electromagnet (6) and a magnet (61) that can be attracted by the electromagnet (6), the pressing plate (7) is specifically a plastic pressing plate, and the magnet (61) is arranged on the plastic pressing plate; When the pressure sensor is subjected to pressure from the rotating assembly, the pressure sensor sends out a pressure signal to enable the electromagnet (6) to generate magnetism, the magnet (61) is attracted by the electromagnet (6), and both the magnet (61) and the plastic pressing plate move toward the direction of the electromagnet (6), and the plastic pressing plate loosens the front and rear straps (8).

6. The strap adjustment device according to any one of claims 1 to 5, characterized in that: The support assembly is provided with a retaining ring (33) located in the circumference of the through hole, the second annular portion (31) and the second matching portion (32) are located on the side of the retaining ring (33) away from the side strap (4), and the gear (2) is located on the side of the retaining ring (33) close to the side strap (4).

7. The strap adjustment device according to claim 6, characterized in that: The support assembly comprises a back cover (3), a first bracket (01) connected to the back cover (3) to form a housing cavity for accommodating the side strap (4), and a second bracket (02) connected to the first bracket (01) for mounting the trigger assembly; the back cover (3) is provided with the second annular portion (31), the second matching portion (32) and the retaining ring (33); the back cover (3), the first bracket (01) and the second bracket (02) are provided with a through hole for forming the through hole.

8. The strap adjustment device according to claim 7, characterized in that: The rotating shaft (11) is longer than the clamping claw (120), and the clamping claw (120) is used to clamp into a through hole of the first bracket (01).

9. The strap adjustment device according to claim 7, characterized in that: An elastic gasket (34) is provided on the circumference of the second annular portion (31), and the elastic gasket (34) is abutted between the annular body (10) and the supporting assembly.

10. The strap adjustment device according to claim 7, characterized in that: It also includes a limiting washer (03) disposed between the first bracket (01) and the second bracket (02) and used to fix the relative positions of the first bracket (01) and the second bracket (02).

11. The strap adjustment device according to claim 7, characterized in that: It also includes an elastic layer (04) disposed on the back cover (3) and used to accommodate the first bracket (01), the second bracket (02) and the trigger component.

12. A head mounted display device, characterized in that: The invention comprises a strap adjustment device as claimed in any one of claims 1 to 11.

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