Knob structure and head-mounted device

Abstract

The present invention relates to the technical field of smart wearable devices. Disclosed are a knob structure and a head-mounted device. The knob structure comprises a housing, an adjustment knob, a driven wheel, a first adjustment assembly, and a second adjustment assembly. The adjustment knob is at least partially exposed from the housing; the driven wheel is arranged in the housing; the first adjustment assembly comprises a first ratchet fixed in the housing and a first pawl transmittingly connected to the driven wheel, the first ratchet being configured to restrict rotation of the first pawl in a first direction; the second adjustment assembly comprises a second ratchet fixed in the housing and a second pawl transmittingly connected to the driven wheel, the second ratchet being configured to restrict rotation of the second pawl in a second direction. The technical solution provided by the present invention achieves bidirectional rotation stopping of the knob structure.

Description

Knob structure and head-mounted device

[0001] This application claims priority to Chinese Patent Application No. 202510011907.6, filed on January 3, 2025, entitled "Knob Structure and Head-Mounted Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of smart wearable technology, and in particular to a knob structure and a head-mounted device. Background Technology

[0003] With the development of virtual reality and augmented reality technologies, head-mounted devices have gradually gained widespread application. Common adjustment methods for existing head-mounted devices include knob adjustments.

[0004] However, current head-mounted devices often come equipped with adjustment knobs and locking buttons. After adjusting the tightness of the head-mounted device by turning the adjustment knob, it is necessary to press the locking button to fix the tightness in the appropriate position. This adjustment operation is rather cumbersome. Summary of the Invention

[0005] The main objective of this invention is to propose a knob structure and a head-mounted device that aims to achieve bidirectional anti-rotation of the knob structure.

[0006] To achieve the above objectives, the knob structure proposed in this embodiment of the invention includes:

[0007] case;

[0008] The adjustment knob is at least partially exposed outside the housing;

[0009] Driven wheel, disposed within the housing;

[0010] A first adjusting assembly includes a first ratchet fixed within the housing and a first pawl driveably connected to the driven wheel. The first ratchet is used to limit the rotation of the first pawl along a first direction.

[0011] The second adjustment assembly includes a second ratchet fixed inside the housing and a second pawl that is drivenly connected to the driven wheel. The second ratchet is used to limit the rotation of the second pawl in a second direction.

[0012] When the adjustment knob is rotated in the first direction, the adjustment knob causes the first pawl to separate from the first ratchet and causes the first pawl to rotate in the first direction, thereby causing the driven wheel to rotate in the first direction;

[0013] When the adjustment knob is rotated in the second direction, the adjustment knob causes the second pawl to separate from the second ratchet and causes the second pawl to rotate in the second direction, thereby causing the driven wheel to rotate in the second direction;

[0014] When the adjustment knob stops rotating, the first pawl engages with the first ratchet, and the second pawl engages with the second ratchet to lock the driven wheel.

[0015] In one embodiment, the first adjustment component further includes a first elastic element located between the first pawl and the driven wheel, the first elastic element being used to cause the first pawl to tend to move closer to the first ratchet.

[0016] In one embodiment, the second adjustment component further includes a second elastic element disposed between the second pawl and the driven wheel, the second elastic element being used to cause the second pawl to tend to move closer to the second ratchet.

[0017] In one embodiment, the driven wheel is provided with two opposing limiting ribs, and a limiting groove is formed between the two limiting ribs. A limiting seat is provided in the limiting groove. The first claw and the second claw are both provided in the limiting groove and respectively contact the limiting ribs. A first elastic element is provided between the first claw and the limiting seat, and a second elastic element is provided between the second claw and the limiting seat.

[0018] In one embodiment, the first pawl includes a first body movable relative to the driven wheel, and a first pawl portion and a first pushing portion fixed on the first body. The adjustment knob is provided with a first knob post. When the adjustment knob is rotated in the first direction, the first knob post is used to push the first pushing portion to separate the first pawl from the first ratchet and to make the first pawl rotate in the first direction.

[0019] In one embodiment, the first pushing portion includes a first pushing ramp, which is disposed close to the first ratchet along the first direction.

[0020] In one embodiment, the second pawl includes a second body movable relative to the driven wheel, and a second pawl portion and a second pushing portion fixed on the second body. The adjustment knob is provided with a second knob post. When the adjustment knob is rotated in the second direction, the second knob post is used to push the second pushing portion to separate the second pawl from the second ratchet and to make the second pawl rotate in the second direction.

[0021] In one embodiment, the second pushing portion includes a second pushing ramp, which is disposed close to the second ratchet along the second direction.

[0022] In one embodiment, the housing includes a detachably connected cover plate and a bottom cover, at least a portion of the adjustment knob is exposed on the cover plate, the adjustment knob is provided with a fixing post, and the knob structure further includes a fixing member provided on the side of the bottom cover opposite to the cover plate, the fixing post and the fixing member are connected to fix the adjustment knob, the first ratchet, the second ratchet, the driven wheel and the bottom cover in the axial direction of the knob structure.

[0023] In one embodiment, the cover plate is provided with one of a snap-fit ​​groove and a snap-fit ​​protrusion, and the first ratchet and the second ratchet are respectively provided with the other. The snap-fit ​​protrusion snaps into the snap-fit ​​groove to restrict the rotation of the first ratchet and the second ratchet.

[0024] The present invention also proposes a head-mounted device, including the aforementioned knob structure and a strap, the strap being connected to the driven wheel for adjusting the tightness of the strap and locking it.

[0025] The technical solution of this invention includes a housing, an adjustment knob at least partially exposed in the housing, a driven wheel disposed within the housing, a first adjustment assembly including a first ratchet and a first pawl, and a second adjustment assembly including a second ratchet and a second pawl. The first and second ratchets are fixed to the housing, and the first and second pawls are respectively connected to the driven wheel. The first ratchet restricts the rotation of the first pawl in a first direction, and the second ratchet restricts the rotation of the second pawl in a second direction. Thus, when the adjustment knob rotates in the first direction, it causes the first pawl to separate from the first ratchet, allowing the first pawl to rotate in the first direction, thereby causing the driven wheel to rotate in the first direction. When the adjustment knob rotates in the second direction, it causes the second pawl to separate from the second ratchet, allowing the second pawl to rotate in the second direction, thereby causing the driven wheel to rotate in the second direction. When the adjustment knob stops rotating, the first pawl engages with the first ratchet, and the second pawl engages with the second ratchet, thereby locking the driven wheel. Thus, by setting the first adjustment component and the second adjustment component, bidirectional rotation of the adjustment knob is achieved. At the same time, when the adjustment knob stops rotating, the knob structure can stop rotating at any time, thereby achieving bidirectional anti-rotation of the knob structure, improving the ease of operation and the simplicity of using the head-mounted device. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the drawings in this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 is a schematic diagram of an embodiment of the knob structure provided by the present invention;

[0028] Figure 2 is an exploded structural diagram of an embodiment of the knob structure;

[0029] Figure 3 is a perspective view of an embodiment of the knob structure;

[0030] Figure 4 is a schematic diagram of the engagement structure between the driven wheel, the first chuck, and the second chuck in Figure 2;

[0031] Figure 5 is a schematic diagram of the cooperation structure between the driven wheel, the first adjusting component, and the second adjusting component in Figure 2;

[0032] Figure 6 is a structural schematic diagram of an embodiment of the adjustment knob in Figure 2;

[0033] Figure 7 is a structural schematic diagram of one embodiment of the cover plate in Figure 2.

[0034] Reference numerals: 100, Housing; 110, Cover plate; 111, Snap-fit ​​groove; 120, Bottom cover; 200, Adjustment knob; 210, First knob post; 220, Second knob post; 230, Fixing post; 300, Driven wheel; 310, Limiting rib; 320, Limiting groove; 330, Limiting seat; 340, Accommodating groove; 400, First adjustment component; 410, First ratchet; 411, First snap-fit ​​protrusion; 420, First pawl; 421, First body; 422, First pawl portion; 423, First pushing portion; 424, First pushing slope; 430, First elastic element; 500, Second adjusting component; 510, Second ratchet; 511, Second locking protrusion; 520, Second pawl; 521, Second body; 522, Second pawl portion; 523, Second pushing portion; 524, Second pushing slope; 530, Second elastic element; 600, Fixing element.

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0039] With the development of virtual reality and augmented reality technologies, head-mounted devices have gradually gained widespread application. Common methods for adjusting the tightness of existing head-mounted devices include using adjustment knobs.

[0040] However, the head-mounted device has both an adjustment knob and a locking button. After adjusting the tightness of the head-mounted device by turning the adjustment knob, it is necessary to press the locking button to fix the tightness in the appropriate position. This adjustment operation is rather cumbersome.

[0041] This invention proposes a knob structure.

[0042] Please refer to Figures 1 to 3. In one embodiment of the present invention, the knob structure includes a housing 100, an adjustment knob 200, a driven wheel 300, a first adjustment component 400, and a second adjustment component 500. The adjustment knob 200 is at least partially exposed outside the housing 100. The driven wheel 300 is disposed inside the housing 100. The first adjustment component 400 includes a first ratchet 410 fixed inside the housing 100 and a first pawl 420 pulverizedly connected to the driven wheel 300. The first ratchet 410 is used to limit the rotation of the first pawl 420 in a first direction. The second adjustment component 500 includes a second ratchet 510 fixed inside the housing 100 and a second pawl 520 pulverizedly connected to the driven wheel 300. The second ratchet 510 is used to limit the rotation of the second pawl 520 in a second direction.

[0043] Specifically, the knob structure can be used in head-mounted devices to adjust the tightness of the head-mounted device's straps. Of course, the knob structure can also be used to adjust shoelaces. Furthermore, the knob structure can be applied to smart rings, eye massagers, lumbar massagers, and other structures. We will not limit the application scenarios of the knob structure here; the following explanation uses the application of the knob structure in head-mounted devices as an example.

[0044] A receiving cavity is formed within the housing 100, and the driven wheel 300, the first adjustment assembly 400, the second adjustment assembly 500, and at least a portion of the adjustment knob 200 are located within the receiving cavity. It is understood that rotating the adjustment knob 200 adjusts the tightness of the head-mounted device; that is, the adjustment knob 200 can rotate relative to the housing 100 under external force. To facilitate the rotation of the adjustment knob 200, at least a portion of the adjustment knob 200 is exposed outside the housing 100. In one embodiment, the outer periphery of the adjustment knob 200 is provided with several spaced-apart raised ribs to enhance the friction between the adjustment knob 200 and the fingers, making operation more slip-resistant. Simultaneously, the raised ribs also facilitate blind operation identification.

[0045] The driven wheel 300 is located within the housing 100. It is understood that when the knob structure is applied to a head-mounted device, the driven wheel 300 is used to connect with the head-mounted device's strap to adjust the tightness of the strap by rotating the driven wheel 300. In this invention, the adjusting knob 200 drives the driven wheel 300 to rotate via the first adjusting component 400 and the second adjusting component 500.

[0046] The first adjustment assembly 400 includes a first ratchet 410 and a first pawl 420. The first ratchet 410 is fixed inside the housing 100, meaning that the first ratchet 410 cannot rotate relative to the housing 100. The first pawl 420 is connected to the driven wheel 300, meaning that when the first pawl 420 rotates, it can drive the driven wheel 300 to rotate accordingly. The first ratchet 410 is used to limit the rotation of the first pawl 420 in a first direction; that is, when the first pawl 420 is in contact with the first ratchet 410, the first pawl 420 cannot rotate in the first direction.

[0047] The second adjustment assembly 500 includes a second ratchet 510 and a second pawl 520. The second ratchet 510 is fixed inside the housing 100, meaning it cannot rotate relative to the housing 100. The second pawl 520 is connected to the driven wheel 300, meaning that when the second pawl 520 rotates, it drives the driven wheel 300 to rotate accordingly. The second ratchet 510 is used to limit the rotation of the second pawl 520 in a second direction; that is, when the second pawl 520 is in contact with the second ratchet 510, the second pawl 520 cannot rotate in the second direction.

[0048] Understandably, one of the first and second directions refers to a clockwise direction, and the other refers to a counterclockwise direction. In one embodiment, when the adjusting knob 200 is rotated in the first direction, the tightness of the head-mounted device can be adjusted; when the adjusting knob 200 is rotated in the second direction, the tightness of the head-mounted device can be adjusted. Of course, in other embodiments, the rotation of the adjusting knob 200 in the first direction can be used to loosen the tightness of the head-mounted device, and the rotation of the adjusting knob 200 in the second direction can be used to tighten the tightness of the head-mounted device.

[0049] When the adjusting knob 200 is rotated in the first direction, it can cause the first pawl 420 to separate from the first ratchet 410. Under external force, the first pawl 420 can move away from the first ratchet 410, that is, it can move closer to the center of the first ratchet 410, thus freeing it from the constraint of the first ratchet 410. This allows the first pawl 420 to rotate in the first direction under the influence of the adjusting knob 200. The rotation of the first pawl 420 in the first direction drives the driven wheel 300 to rotate in the same direction. It is worth noting that the second ratchet 510 can restrict the rotation of the second pawl 520 in the second direction, but it does not restrict the rotation of the second pawl 520 in the first direction. In other words, the second pawl 520 does not obstruct the rotation of the driven wheel 300 in the first direction. Thus, driven by the adjusting knob 200, the first pawl 420 rotates in the first direction, thereby causing the driven wheel 300 to rotate in the first direction, which in turn causes the second pawl 520, which is connected to the driven wheel 300, to slide relative to the second ratchet 510 in the first direction. In this way, the driven wheel 300 is rotated in the first direction.

[0050] When the adjusting knob 200 is rotated in the second direction, it can cause the second pawl 520 to separate from the second ratchet 510. Under external force, the second pawl 520 can move away from the second ratchet 510, that is, it can move closer to the center of the second ratchet 510, thus freeing it from the ratchet's constraint. This allows the second pawl 520 to rotate in the second direction under the influence of the adjusting knob 200. The rotation of the second pawl 520 in the second direction drives the driven wheel 300 to rotate in the second direction as well. It is worth noting that while the first ratchet 410 restricts the rotation of the first pawl 420 in the first direction, it does not restrict its rotation in the second direction. In other words, the first pawl 420 does not obstruct the rotation of the driven wheel 300 in the second direction. Thus, driven by the adjusting knob 200, the second pawl 520 rotates in the second direction, thereby causing the driven wheel 300 to rotate in the second direction, which in turn causes the first pawl 420, which is connected to the driven wheel 300, to slide relative to the first ratchet 410 in the second direction. In this way, the rotation of the driven wheel 300 in the second direction is achieved.

[0051] When the adjusting knob 200 stops rotating, the external force that caused the first pawl 420 to disengage from the first ratchet 410 disappears. At this time, the first pawl 420 engages with the first ratchet 410, preventing the first pawl 420 from rotating in the first direction, thus preventing the driven wheel 300 from rotating in the first direction. Simultaneously, the external force that caused the second pawl 520 to disengage from the second ratchet 510 disappears. At this time, the second pawl 520 engages with the second ratchet 510, preventing the second pawl 520 from rotating in the second direction, thus preventing the driven wheel 300 from rotating in the second direction. In this way, the rotation of the driven wheel 300 in both the first and second directions is restricted, thereby locking the driven wheel 300.

[0052] Thus, by setting the first adjustment component 400 and the second adjustment component 500, the bidirectional rotation of the adjustment knob 200 is realized. At the same time, when the adjustment knob 200 stops rotating, the knob structure can stop rotating at any time, so that the forward and reverse rotation of the knob structure can be stopped at any time, which improves the ease of operation and the ease of use of the head-mounted device.

[0053] Please refer to Figures 4 and 5. In an embodiment of the present invention, the first adjustment component 400 further includes a first elastic element 430, which is located between the first pawl 420 and the driven wheel 300. The first elastic element 430 is used to make the first pawl 420 tend to move closer to the first ratchet 410.

[0054] Understandably, in the embodiment shown in the figures of this invention, the first adjusting assembly 400 further includes a first elastic element 430. One end of the first elastic element 430 is connected to the first pawl 420, and the other end is connected to the driven wheel 300. When the adjusting knob 200 rotates in the first direction, the adjusting knob 200 causes the first pawl 420 to separate from the first ratchet 410, causing the first pawl 420 to move towards the center of the first ratchet 410, thereby compressing the first elastic element 430. When the adjusting knob 200 stops rotating in the first direction, the adjusting knob 200 no longer drives the first pawl 420, and the first pawl 420 loses the pushing force away from the first ratchet 410. At the same time, the first elastic element 430 also loses the compressive force. Under the action of the deformation force of the first elastic element 430 itself, the first elastic element 430 extends and drives the first pawl 420 to move towards the first ratchet 410 until the first pawl 420 engages with the first ratchet 410. Thus, by setting the first elastic element 430, the first pawl 420 tends to automatically approach the first ratchet 410, thereby avoiding the need for an additional reset structure to drive the first pawl 420 to approach the first ratchet 410, which is beneficial to the simplification of the knob structure.

[0055] In one embodiment, the first elastic element 430 is configured as a spring. Of course, the first elastic element 430 can also be a sheet, silicone, etc.

[0056] Of course, in other embodiments, the first elastic element 430 may not be provided. Instead, the movement of the first pawl 420 towards the first ratchet 410 can be achieved by providing a first reset structure. In one embodiment, the first reset structure is configured as a manual adjustment structure, including a first reset rod provided on the first pawl 420. A first through hole is provided on the adjustment knob 200, and at least part of the first reset rod is exposed in the first through hole. When the adjustment knob 200 stops rotating in the first direction, the first reset rod is moved away from the center of the first ratchet 410, thereby causing the first pawl 420 to engage with the first ratchet 410.

[0057] Please refer to Figures 4 and 5. In an embodiment of the present invention, the second adjustment component 500 further includes a second elastic element 530, which is disposed between the second pawl 520 and the driven wheel 300. The second elastic element 530 is used to make the second pawl 520 tend to move closer to the second ratchet 510.

[0058] Understandably, in the embodiment shown in the figures of this invention, the second adjusting assembly 500 further includes a second elastic element 530. One end of the second elastic element 530 is connected to the second pawl 520, and the other end is connected to the driven wheel 300. When the adjusting knob 200 rotates in the second direction, the adjusting knob 200 causes the second pawl 520 to separate from the second ratchet 510, causing the second pawl 520 to move towards the center of the second ratchet 510, thereby compressing the second elastic element 530. When the adjusting knob 200 stops rotating in the second direction, the adjusting knob 200 no longer drives the second pawl 520, and the second pawl 520 loses the pushing force away from the second ratchet 510. At the same time, the second elastic element 530 also loses its compressive force. Under the action of the deformation force of the second elastic element 530 itself, the second elastic element 530 extends and drives the second pawl 520 to move towards the second ratchet 510 until the second pawl 520 engages with the second ratchet 510. Thus, by setting the second elastic element 530, the second pawl 520 tends to automatically move closer to the second ratchet 510, thereby avoiding the need for an additional reset structure to drive the second pawl 520 closer to the second ratchet 510, which is beneficial to the simplification of the knob structure.

[0059] In one embodiment, the second elastic element 530 is configured as a spring. Of course, the second elastic element 530 can also be a sheet, silicone, etc.

[0060] Of course, in other embodiments, the second elastic element 530 may not be provided. Instead, the movement of the second pawl 520 towards the second ratchet 510 can be achieved by providing a second reset structure. In one embodiment, the second reset structure is configured as a manually adjustable structure, including a second reset rod provided on the second pawl 520. A second through hole is provided on the adjusting knob 200, with at least a portion of the second reset rod exposed in the second through hole. When the adjusting knob 200 stops rotating in the second direction, the second reset rod is moved in a direction away from the center of the second ratchet 510, thereby causing the second pawl 520 to engage with the second ratchet 510.

[0061] Please refer to Figures 4 and 5. In an embodiment of the present invention, the driven wheel 300 is provided with two opposing limiting ribs 310, and a limiting groove 320 is formed between the two limiting ribs 310. A limiting seat 330 is provided in the limiting groove 320. The first claw 420 and the second claw 520 are both provided in the limiting groove 320 and are in contact with the limiting ribs 310 respectively. A first elastic element 430 is provided between the first claw 420 and the limiting seat 330, and a second elastic element 530 is provided between the second claw 520 and the limiting seat 330.

[0062] Specifically, the driven wheel 300 is provided with two opposing limiting ribs 310, and the limiting ribs 310 have a certain height along the axial direction of the driven wheel 300. A limiting groove 320 is formed between the two limiting ribs 310, and a limiting seat 330 is provided in the limiting groove 320. The two limiting ribs 310 have a certain length along the direction close to the ratchet teeth of the first ratchet 410, that is, the limiting groove 320 has a certain length. Openings are provided at both ends along the length direction of the limiting groove 320, and the first pawl 420 and the second pawl 520 are respectively provided at the two openings. The first pawl 420 and the second pawl 520 each have at least one sidewall that contacts the limiting rib 310. Thus, when the first pawl 420 and the second pawl 520 rotate, they drive the limiting rib 310 to rotate, thereby realizing the rotation of the driven wheel 300.

[0063] In one embodiment, the first claw 420 has a first mounting hole on the side facing the limiting seat 330, and the limiting seat 330 has a second mounting hole on the side facing the first claw 420. Both ends of the first elastic member 430 are respectively fixed within the first mounting hole and the second mounting hole, thereby connecting the first claw 420, the first elastic member 430, and the limiting seat 330. The first and second mounting holes provide a mounting position for the first elastic member 430 and also guide its compression.

[0064] In one embodiment, the second claw 520 has a third mounting hole on the side facing the limiting seat 330, and the limiting seat 330 has a fourth mounting hole on the side facing the second claw 520. The two ends of the second elastic member 530 are respectively fixed in the third and fourth mounting holes, thereby connecting the second claw 520, the second elastic member 530, and the limiting seat 330. The third and fourth mounting holes provide a mounting position for the second elastic member 530 and also guide its compression.

[0065] Understandably, driven by the adjusting knob 200, the first pawl 420 and the second pawl 520 can move along the length direction of the limiting groove 320. To prevent the first pawl 420 and the second pawl 520 from dislodging from the limiting groove 320, the driven wheel 300 is also provided with a receiving groove 340 communicating with the limiting groove 320. The receiving groove 340 is recessed in a direction away from the adjusting knob 200. Understandably, the limiting groove 320 has a certain width in the direction from one limiting rib 310 to another. The width of the receiving groove 340 is consistent with the width of the limiting groove 320, which is beneficial to the simplification of the knob structure. In the width direction, at least a portion of the first pawl 420 contacts the groove sidewall of the receiving groove 340, and at least a portion of the second pawl 520 contacts the groove sidewall of the receiving groove 340, and both the first pawl 420 and the second pawl 520 can move relative to the receiving groove 340. This configuration achieves both the transmission connection between the first pawl 420 and the second pawl 520 and the driven wheel 300, and also enables the first pawl 420 and the second pawl 520 to be separated from the first ratchet 410 and the second ratchet 510, respectively.

[0066] In one embodiment, the first pawl 420 and the second pawl 520 are arranged opposite to each other. Specifically, with the axis of the driven wheel 300 as the line of symmetry, the first pawl 420 and the second pawl 520 are symmetrically arranged. That is, the center of the limiting seat 330 is the center of the driven wheel 300, which is beneficial to the balance of the knob structure. It can be understood that the adjusting knob 200, the first ratchet 410, the second ratchet 510, and the driven wheel 300 are arranged in a stacked manner, with all four centered on the same circle. In order to achieve the engagement of the first pawl 420 and the second pawl 520 with the first ratchet 410 and the second ratchet 510 respectively, the first pawl 420 and the second pawl 520 are located at different heights along the depth direction of the limiting groove 320.

[0067] Please refer to Figures 3, 5, and 6. In an embodiment of the present invention, the first pawl 420 includes a first body 421 movable relative to the driven wheel 300, and a first pawl portion 422 and a first pushing portion 423 fixed on the first body 421. The adjusting knob 200 is provided with a first knob post 210. When the adjusting knob 200 is rotated in a first direction, the first knob post 210 is used to push the first pushing portion 423 to separate the first pawl 420 from the first ratchet 410 and to rotate the first pawl 420 in the first direction.

[0068] Specifically, in the embodiment shown in the figures of this invention, the first pawl 420 includes a first body 421, a first pawl portion 422, and a first pushing portion 423. The first body 421 is at least partially disposed within the receiving groove 340 and is movable within the receiving groove 340. In one embodiment, a portion of the first body 421 is located within the limiting groove 320. Along the axial direction of the knob structure, the first body 421 has a first pushing portion 423 mounted on the side facing the adjusting knob 200. The first pushing portion 423 contacts at least one limiting rib 310 so that when the first pawl 420 rotates, the first pushing portion 423 can push against the limiting rib 310, thereby causing the driven wheel 300 to rotate accordingly. Along the radial direction of the knob structure, the first body 421 has a first pawl 422 mounted on the side facing the first ratchet 410. It is understood that the structure of the first pawl 422 is adapted to the ratchet teeth of the first ratchet 410 so that when the first pawl 422 is engaged with the first ratchet 410, the first ratchet 410 can restrict the rotation of the first pawl 422 in the first direction.

[0069] In one embodiment, the first pushing part 423 has a triangular cross-section. One side wall of the first pushing part 423 is used to contact the limiting rib 310, another side wall is used for mounting the first elastic member 430, and yet another side wall is used for transmission connection with the adjusting knob 200. Along the radial direction of the knob structure, the adjusting knob 200 is provided with a first knob post 210 near the first ratchet 410. The first knob post 210 extends along the axial direction of the knob structure and is used to push one side wall of the first pushing part 423. In one embodiment, the side of the first pushing part 423 that abuts against the first knob post 210 is configured as a first pushing slope 424. Along the first direction, the first pushing slope 424 is located near the first ratchet 410. Thus, when the first knob post 210 pushes the first pushing slope 424, the pushing force on the first pushing part 423 is decomposed into two component forces in two directions, driving the first pawl 420 to move in both directions. The force in the first direction is directed towards the axis of the knob structure, causing the first pawl 420 to move towards the axis of the knob structure and separate from the first ratchet 410. The force in the second direction is perpendicular to the force in the first direction, causing the first pawl 420 to rotate along the first direction. In this way, the separation of the first pawl 420 from the first ratchet 410 and the rotation of the first pawl 420 along the first direction are achieved simultaneously.

[0070] In the embodiment shown in the figures of this invention, the first pushing slope 424 is configured as a straight slope. Of course, in other embodiments, the first pushing slope 424 may also be an arc-shaped slope.

[0071] Understandably, as the adjustment knob 200 rotates, the first knob post 210 pushes against the first pushing part 423 and moves toward the axis closer to the knob structure. In order to avoid the first claw part 422 interfering with the movement of the first knob post 210, in one embodiment, a first clearance gap is provided between the first claw part 422 and the first pushing part 423, and the first clearance gap allows the first knob post 210 to pass through.

[0072] Of course, in other embodiments, the first pawl 420 can also be configured as a first cantilever fixed to the driven wheel 300, the free end of the first cantilever is provided with a first locking tooth, and the first knob post 210 is used to push the first cantilever to move toward the axis of the knob structure, so that the first locking tooth separates from the first ratchet 410.

[0073] Please refer to Figures 3, 5, and 6. In an embodiment of the present invention, the adjusting knob 200 is provided with a second knob post 220, and the second pawl 520 includes a second body 521 for transmission connection with the driven wheel 300, a first pawl portion fixed on the second body 521, and a second pushing portion 523 fixed on the second body 521. When the adjusting knob 200 is rotated in the second direction, the second knob post 220 is used to push the second pushing portion 523 so that the second pawl 520 is separated from the second ratchet 510.

[0074] Specifically, in the embodiment shown in the figures of this invention, the second pawl 520 includes a second body 521, a second pawl portion 522, and a second pushing portion 523. The second body 521 is at least partially disposed within the receiving groove 340 and is movable within the receiving groove 340. In one embodiment, a portion of the second body 521 is located within the limiting groove 320. Along the axial direction of the knob structure, the second body 521 has a second pushing portion 523 mounted on the side facing the adjusting knob 200. The second pushing portion 523 contacts at least one limiting rib 310 so that when the second pawl 520 rotates, the second pushing portion 523 can push against the limiting rib 310, thereby causing the driven wheel 300 to rotate accordingly. Along the radial direction of the knob structure, the second body 521 has a second pawl 522 mounted on the side facing the second ratchet 510. Understandably, the structure of the second pawl 522 is adapted to the ratchet teeth of the second ratchet 510 so that when the second pawl 522 is engaged with the second ratchet 510, the second ratchet 510 can restrict the rotation of the second pawl 522 in the second direction.

[0075] In one embodiment, the second pushing part 523 has a triangular cross-section. One side wall of the second pushing part 523 is used to contact the limiting rib 310, another side wall is used for mounting the second elastic member 530, and yet another side wall is used for transmission connection with the adjusting knob 200. Along the radial direction of the knob structure, the adjusting knob 200 is provided with a second knob post 220 near the second ratchet 510. The second knob post 220 extends axially along the knob structure and is used to push the side wall of the second pushing part 523. In one embodiment, the side of the second pushing part 523 that abuts against the second knob post 220 is configured as a second pushing slope 524. Along the second direction, the second pushing slope 524 is located near the second ratchet 510. Thus, when the second knob post 220 pushes the second pushing slope 524, the pushing force on the second pushing part 523 is decomposed into two component forces in two directions, driving the second pawl 520 to move in both directions. The force in the first direction is directed towards the axis of the knob structure, causing the second pawl 520 to move towards the axis of the knob structure and separate from the second ratchet 510. The force in the second direction is perpendicular to the force in the first direction, causing the second pawl 520 to rotate in the second direction. In this way, the separation of the second pawl 520 from the second ratchet 510 and the rotation of the second pawl 520 in the second direction are achieved simultaneously.

[0076] In the embodiment shown in the figures of this invention, the second pushing slope 524 is configured as a straight slope. Of course, in other embodiments, the second pushing slope 524 may also be an arc-shaped slope.

[0077] Understandably, as the adjustment knob 200 rotates, the second knob post 220 pushes against the second pushing part 523 and moves toward the axis closer to the knob structure. In order to avoid the second claw part 522 interfering with the movement of the second knob post 220, in one embodiment, a second clearance gap is provided between the second claw part 522 and the second pushing part 523, and the second clearance gap allows the second knob post 220 to pass through.

[0078] Of course, in other embodiments, the second pawl 520 can also be configured as a second cantilever fixed to the driven wheel 300. The free end of the second cantilever is provided with a second locking tooth. The second knob post 220 is used to push the second cantilever to move toward the axis of the knob structure, so that the second locking tooth separates from the second ratchet 510.

[0079] Please refer to Figures 2 and 6. In an embodiment of the present invention, the housing 100 includes a detachably connected cover plate 110 and a bottom cover 120. At least a portion of the adjustment knob 200 is exposed outside the cover plate 110. The adjustment knob 200 is provided with a fixing post 230. The knob structure also includes a fixing member 600 provided on the side of the bottom cover 120 opposite to the cover plate 110. The fixing post 230 and the fixing member 600 are connected to fix the adjustment knob 200, the first ratchet 410, the second ratchet 510, the driven wheel 300, and the bottom cover 120 in the axial direction of the knob structure.

[0080] Specifically, the cover plate 110 and the bottom cover 120 are fitted together to enclose the receiving cavity. The detachable connection of the cover plate 110 and the bottom cover 120 facilitates the maintenance of the knob structure. In one embodiment, the cover plate 110 and the bottom cover 120 are connected by a screw fastening structure. Along the circumference of the knob structure, the cover plate 110 and the bottom cover 120 are respectively provided with multiple spaced connecting holes. Multiple screws pass through multiple connecting holes to connect the cover plate 110 and the bottom cover 120. In one embodiment, to improve the aesthetics of the knob structure, the connecting holes on the cover plate 110 are set as blind holes.

[0081] Understandably, the cover plate 110 and the bottom cover 120 are fixed in place. In the head-mounted device, the bottom cover 120 is used to fix it to other structural components of the head-mounted device. The adjustment knob 200 can rotate relative to the cover plate 110 and the bottom cover 120. To facilitate operation of the adjustment knob 200, at least a portion of the adjustment knob 200 is exposed outside the cover plate 110 to improve the ease of operation. The driven wheel 300 can rotate relative to the cover plate 110 and the bottom cover 120 to rotate under the drive of the adjustment knob 200, thereby adjusting the tightness. Neither the first ratchet 410 nor the second ratchet 510 can rotate relative to the cover plate 110 and the bottom cover 120. In one embodiment, both the first ratchet 410 and the second ratchet 510 are fixed to the cover plate 110 to prevent rotation of the first ratchet 410 and the second ratchet 510.

[0082] Understandably, to ensure the normal use of the knob structure, it is necessary to prevent the adjustment knob 200, the first ratchet 410, the second ratchet 510, and the driven wheel 300 from moving axially along the knob structure. A fixing post 230 is provided on the side of the adjustment knob 200 facing the first ratchet 410. In one embodiment, the fixing post 230 is located on the axis of the adjustment knob 200, and a fixing hole extending axially is provided on the fixing post 230. Meanwhile, the driven wheel 300 is provided with a first through hole. In one embodiment, the first through hole is located on the limiting seat 330; the bottom cover 120 is provided with a second through hole, wherein the fixing hole, the first through hole, and the second through hole are correspondingly arranged. The fixing member 600 is located on the side of the bottom cover 120 away from the cover plate 110. The fixing member 600 passes through the second through hole and the first through hole in sequence and extends into the fixing hole, so that the fixing member 600 and the fixing post 230 are connected, thereby restricting the movement of the adjusting knob 200, the first ratchet 410, the second ratchet 510 and the driven wheel 300 in the axial direction of the knob structure.

[0083] Please refer to Figures 2 and 7. In an embodiment of the present invention, the cover plate 110 is provided with one of a snap-fit ​​groove 111 and a snap-fit ​​protrusion, and the first ratchet 410 and the second ratchet 510 are respectively provided with the other. The snap-fit ​​protrusion snaps into the snap-fit ​​groove 111 to restrict the rotation of the first ratchet 410 and the second ratchet 510.

[0084] Specifically, in the embodiment shown in the figures of this invention, the cover plate 110 is provided with a snap-fit ​​groove 111, and the first ratchet 410 and the second ratchet 510 are respectively provided with snap-fit ​​protrusions. The following is a detailed description of this embodiment. The cover plate 110 has an annular structure, and a drain outlet is provided on the side of the cover plate 110 away from the bottom cover 120 for exposing the adjustment knob 200. The cover plate 110 has a snap-fit ​​groove 111 on its inner sidewall facing the bottom cover 120, and the snap-fit ​​groove 111 extends axially along the knob structure. It is understood that in one embodiment, the outer diameters of the first ratchet 410 and the second ratchet 510 are equal to facilitate the simplification of the knob structure. The outer peripheral wall of the first ratchet 410 is provided with snap-fit ​​protrusions extending radially along the knob structure, and the outer peripheral wall of the second ratchet 510 is also provided with snap-fit ​​protrusions extending radially along the knob structure. For ease of explanation, a first latching protrusion 411 is defined on the first ratchet 410, and a second latching protrusion 511 is defined on the second ratchet 510. When assembling the knob structure, the first latching protrusion 411 and the second latching protrusion 511 sequentially engage with the latching groove 111. In one embodiment, the first ratchet 410 is located on the side of the second ratchet 510 facing the cover plate 110. Thus, after the knob structure is assembled, the first latching protrusion 411 contacts the bottom wall of the latching groove 111, thereby restricting the circumferential rotation of the first ratchet 410 and the second ratchet 510 along the knob structure, and also restricting the axial movement of the first ratchet 410 and the second ratchet 510 along the knob structure.

[0085] In one embodiment, the cover plate 110 is provided with a plurality of snap-fit ​​grooves 111 spaced apart along its circumference. Correspondingly, the first ratchet 410 and the second ratchet 510 are provided with a plurality of snap-fit ​​protrusions spaced apart along their circumference. The plurality of snap-fit ​​grooves 111 correspond one-to-one with the plurality of snap-fit ​​protrusions, thereby improving the stability of the rotation restriction of the first ratchet 410 and the second ratchet 510.

[0086] The present invention also proposes a head-mounted device, which includes a strap and a knob structure. The specific structure of the knob structure is as described in the above embodiments. Since the head-mounted device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The strap is connected to the driven wheel 300 for adjusting the tightness of the strap and locking it.

[0087] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A knob structure, characterized in that, include: case; The adjustment knob is at least partially exposed outside the housing; Driven wheel, disposed within the housing; The first adjustment component includes a first ratchet fixed inside the housing and a first pawl that is drivenly connected to the driven wheel. The first ratchet is used to limit the rotation of the first pawl in a first direction. as well as The second adjustment assembly includes a second ratchet fixed inside the housing and a second pawl that is drivenly connected to the driven wheel. The second ratchet is used to limit the rotation of the second pawl in a second direction. When the adjustment knob is rotated in the first direction, the adjustment knob causes the first pawl to separate from the first ratchet and causes the first pawl to rotate in the first direction, thereby causing the driven wheel to rotate in the first direction; When the adjustment knob is rotated in the second direction, the adjustment knob causes the second pawl to separate from the second ratchet and causes the second pawl to rotate in the second direction, thereby causing the driven wheel to rotate in the second direction; When the adjustment knob stops rotating, the first pawl engages with the first ratchet, and the second pawl engages with the second ratchet to lock the driven wheel.

2. The knob structure as described in claim 1, characterized in that, The first adjustment component further includes a first elastic element located between the first pawl and the driven wheel, the first elastic element being used to cause the first pawl to tend to move closer to the first ratchet.

3. The knob structure as described in claim 2, characterized in that, The second adjustment component further includes a second elastic element disposed between the second pawl and the driven wheel, the second elastic element being used to give the second pawl a tendency to move closer to the second ratchet.

4. The knob structure as described in claim 3, characterized in that, The driven wheel is provided with two opposing limiting ribs, and a limiting groove is formed between the two limiting ribs. A limiting seat is provided in the limiting groove. The first claw and the second claw are both provided in the limiting groove and are in contact with the limiting ribs respectively. A first elastic element is provided between the first claw and the limiting seat, and a second elastic element is provided between the second claw and the limiting seat.

5. The knob structure as described in claim 1, characterized in that, The first pawl includes a first body movable relative to the driven wheel, and a first pawl portion and a first pushing portion fixed on the first body. The adjustment knob is provided with a first knob post. When the adjustment knob is rotated in the first direction, the first knob post is used to push the first pushing portion to separate the first pawl from the first ratchet and to make the first pawl rotate in the first direction.

6. The knob structure as described in claim 5, characterized in that, The first pushing part includes a first pushing slope, which is disposed close to the first ratchet along the first direction.

7. The knob structure as described in claim 1, characterized in that, The second pawl includes a second body movable relative to the driven wheel, and a second pawl portion and a second pushing portion fixed on the second body. The adjustment knob is provided with a second knob post. When the adjustment knob is rotated in the second direction, the second knob post is used to push the second pushing portion to separate the second pawl from the second ratchet and to make the second pawl rotate in the second direction.

8. The knob structure as described in claim 7, characterized in that, The second pushing part includes a second pushing slope, which is disposed close to the second ratchet along the second direction.

9. The knob structure as described in claim 1, characterized in that, The housing includes a detachably connected cover plate and a bottom cover. At least a portion of the adjustment knob is exposed on the cover plate. The adjustment knob is provided with a fixing post. The knob structure also includes a fixing member located on the side of the bottom cover opposite to the cover plate. The fixing post and the fixing member are connected to fix the adjustment knob, the first ratchet, the second ratchet, the driven wheel, and the bottom cover in the axial direction of the knob structure.

10. The knob structure as described in claim 9, characterized in that, The cover plate is provided with one of a locking groove and a locking protrusion, and the first ratchet and the second ratchet are respectively provided with the other. The locking protrusion is engaged with the locking groove to restrict the rotation of the first ratchet and the second ratchet.

11. A head-mounted device, characterized in that, Includes a knob structure and a strap as described in any one of claims 1 to 10, the strap being connected to the driven wheel for adjusting the tightness of the strap and locking it.

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