Telescopic adjustment mechanism and wearable device

Abstract

The present invention discloses a telescopic adjustment mechanism and a wearable device. The telescopic adjustment mechanism includes a mounting carrier, a first adjustment component, and a second adjustment component. The first adjustment component includes a driving gear, two driven racks, and a first elastic member. The driving gear is rotatably mounted on the mounting carrier, and the two driven racks are respectively engaged with opposite sides of the driving gear. The first elastic member is disposed between the mounting carrier and the driving gear. The second adjustment component is disposed on the mounting carrier. The second adjustment component is used to drive the two driven racks toward each other for a second contraction after the two driven racks are driven toward each other by the first elastic member to contract. The second adjustment component can also lock the movement of the two driven racks away from each other. The technical solution of the present invention can improve the convenience of using the telescopic adjustment mechanism, thereby enhancing the user experience.

Description

Technical Field

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

[0002] At present, in order to adapt to the wearing of different users, some wearable devices such as AR products and VR products will adjust the two straps through a telescopic adjustment mechanism. The telescopic adjustment mechanism of the wearable device in the related art usually includes an adjustment knob, a driving gear, a driven rack connected to the two straps or directly set on the strap, a stop pawl for one-way stopping the driving gear, and an unlocking paddle. At this time, by driving the adjustment knob to rotate in one direction (which can be defined as clockwise), the two straps can be driven to move closer to each other and shrink through the transmission of the driving gear and the two driven racks; after the two straps are adjusted into place, the stop pawl will limit the contact of the driving gear, thereby achieving relative limit fixation of the two straps to complete the wearing of the wearable device. When the wearable device needs to be removed, the unlocking paddle is driven to move the locking pawl away from the driving gear, thereby releasing the locking pawl from the driving gear, and then the adjusting knob can be driven to rotate in the other direction (which can be defined as counterclockwise) to drive the two straps to move away from each other and extend, thereby achieving the removal of the wearable device.

[0003] However, in actual use of the aforementioned telescopic adjustment mechanism, the driving gear is restrained by the stop pawl, preventing it from rotating in a single, clockwise direction. Consequently, the two corresponding driven racks can only be driven by the driving gear. This means that when a user wishes to wear the device, they can only adjust the two straps into position by repeatedly turning the adjustment knob. Furthermore, the distance the two straps can move, driven by the driving gear and the driven rack, with each rotation of the adjustment knob is limited. This results in a long time required for the user to adjust the straps into position by turning the adjustment knob. In particular, when the combined wearable size of the two straps is smaller than the desired size, the user must first move the unlocking paddle to move the stop pawl away from the driving gear, releasing the stop pawl from locking the driving gear. Only then can the user further operate the adjustment knob to extend the two straps and then retract them. Therefore, the telescopic adjustment mechanisms of wearable devices in the related art are inconvenient to use, impacting the user experience. Summary of the Invention

[0004] The main purpose of the present invention is to provide a telescopic adjustment mechanism, aiming to improve the convenience of using the telescopic adjustment mechanism and enhance the user experience.

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

[0006] Install the carrier;

[0007] a first adjustment assembly, comprising a driving gear, two driven racks, and a first elastic member, wherein the driving gear is rotatably mounted on the mounting carrier, the two driven racks are respectively engaged with opposite sides of the driving gear, and the first elastic member is disposed between the mounting carrier and the driving gear; and

[0008] The second adjustment component is arranged on the mounting carrier. The second adjustment component is used to drive the two driven racks to move closer to each other for a second contraction after the two driven racks are driven to move closer to each other by the first elastic member and contract. The second adjustment component can also lock the movement of the two driven racks away from each other.

[0009] Optionally, the second adjustment component includes:

[0010] an adjusting knob rotatably mounted on the mounting carrier; and

[0011] a clutch structure, the clutch structure being provided on the mounting carrier and being capable of transmitting the transmission from the adjusting knob to the driving gear when the adjusting knob is rotated in a first direction, thereby driving the two driven racks toward each other and locking the movement of the two driven racks away from each other;

[0012] When the adjusting knob rotates in a second direction opposite to the first direction, the clutch structure can block the transmission of the adjusting knob to the driving gear and release the locking of the movement of the two driven racks away from each other.

[0013] Optionally, the clutch structure includes a transmission component, a stop component and a reset component;

[0014] The transmission assembly is movably disposed between the driving gear and the adjusting knob, and when the adjusting knob rotates in a first direction, the transmission assembly can move to conduct transmission from the adjusting knob to the driving gear;

[0015] The stop assembly can prevent the adjusting knob from rotating in the second direction, or prevent the transmission structure from rotating in the second direction when the adjusting knob is turned on to rotate the driving gear, so as to lock the two driven racks from moving away from each other;

[0016] When the adjusting knob rotates along the second direction, the reset structure can drive the transmission assembly to move to block the transmission of the adjusting knob to the driving gear.

[0017] Optionally, when the adjusting knob rotates in the second direction, the reset assembly may be abutted and driven by the adjusting knob to drive the transmission assembly to move to block the transmission of the adjusting knob to the driving gear.

[0018] Optionally, the reset component includes:

[0019] a sliding plate, the sliding plate being slidably disposed on the mounting carrier and being abutted against the transmission assembly; and

[0020] a rotating claw rotatably provided on the sliding plate, wherein the rotating claw has a rotation direction perpendicular to the rotation direction of the adjusting rotation;

[0021] The adjusting knob is provided with abutment teeth, and when the adjusting knob is rotated in a first direction, the rotating claw can be abutted by the abutment teeth and driven to rotate;

[0022] When the adjusting knob rotates in the second direction, the rotation of the rotating claw is limited and can be driven to slide by the abutment teeth, so that the sliding plate drives the transmission assembly to move to block the transmission to the driving gear.

[0023] Optionally, the transmission assembly is formed with an abutment step, which is arranged around the circumference of the transmission assembly, and the sliding plate is sleeved on the outer side of the transmission assembly and can abut against the abutment step;

[0024] And / or, the number of the rotating claws is at least two, and they are evenly spaced from the rotation axis of the adjusting knob;

[0025] And / or, the reset assembly includes a second elastic member, which is provided between the mounting carrier and the rotating claw and can drive the rotating claw to rotate and reset and / or the sliding plate to slide and reset.

[0026] Optionally, the adjusting knob comprises an inner knob and an outer knob which are nested together, the inner knob is provided with a first abutting portion, and the outer knob is provided with a second abutting portion;

[0027] When the outer knob drives the inner knob to rotate in the first direction through the cooperation between the second abutting portion and the first abutting portion, the transmission assembly can move to conduct the transmission of the inner knob to the driving gear;

[0028] When the outer knob rotates relative to the inner knob along the second direction, the reset assembly can be abutted and driven by the outer knob to drive the transmission assembly to move to block the transmission of the driving gear by the inner knob.

[0029] Optionally, one end of the transmission assembly is mounted on the driving gear and can be driven to rotate by the driving gear, and the transmission assembly can also slide relative to the driving gear to the other end of the transmission assembly and abut against the inner knob for transmission, so as to conduct the transmission of the inner knob to the driving gear;

[0030] The stop assembly is rotatably provided on the mounting carrier, one end of the stop assembly is used to abut against and prevent the inner knob from rotating in the second direction, and the other end is used to abut against and prevent the transmission assembly from sliding until it abuts against and transmits the rotation of the inner knob;

[0031] When the outer knob drives the inner knob to rotate in the first direction, one end of the stop assembly close to the inner knob can be abutted and driven by the knob, so that the other end of the stop assembly is not abutted and blocked by the transmission assembly.

[0032] Optionally, the transmission assembly includes a transmission member and a third elastic member, wherein the transmission member is slidably inserted into the driving gear along the rotation axis of the driving gear and the inner knob, and can be abutted and driven to rotate by the driving gear;

[0033] The third elastic member is provided between the driving gear and the transmission member, and can drive the transmission member to slide in a direction close to the inner knob, so that the transmission member abuts against the inner knob for transmission;

[0034] One end of the stopping component away from the inner knob can abut against one end of the transmission member facing the driving gear to prevent the transmission member from sliding until it abuts against the inner knob for transmission.

[0035] Optionally, an insertion groove is provided on a side of the driving gear facing the inner knob, and the insertion groove is arranged in a ring shape around the rotation axis of the driving gear;

[0036] The transmission member is an annular structure with openings at both ends. One of the two opposite ends of the transmission member is inserted into the insertion groove and abuts against the groove wall of the insertion groove for transmission. The third elastic member is provided between the groove wall of the insertion groove and the transmission member.

[0037] An inserting column is provided on a side of the inner knob facing the driving gear. The inserting column is inserted into an end of the transmission member away from the inserting slot and can abut against the transmission member for transmission.

[0038] The present invention also provides a wearable device comprising the telescopic adjustment mechanism described above.

[0039] When the telescopic adjustment mechanism of the technical solution of the present invention is applied to a wearable device, the size of the wearing space of the wearable device can be adjusted successively through the first adjustment component and the second adjustment component. Specifically, the adjustment work can be performed first through the first adjustment component, while the second adjustment component does not work. At this time, the active gear and the two driven racks in the first adjustment component are both in a state where they can rotate freely in both directions. At this time, the user can directly pull the two driven racks or the straps connected to the driven racks in the wearable device to perform elongation adjustment, so that the size of the wearing space of the wearable device can be larger than the size of the human head, thereby facilitating the user to quickly wear the wearable device. Since the user pulls the two driven racks or the straps connected to the driven racks in the wearable device to perform elongation adjustment, the active gear meshing with the two driven racks will be driven accordingly, and drive the first elastic member to undergo corresponding elastic deformation. Therefore, after the initial wearing is completed and the pulling force on the two driven racks or the straps connected to the driven racks in the wearable device is removed, the first elastic member, under the action of its deforming elastic force, can drive the driving gear to rotate and reset. During this rotational reset process, the two driven racks are driven to move closer together and contract, thereby completing the initial adjustment of the telescopic adjustment mechanism by the first adjustment assembly. After that, the second adjustment assembly can be used for adjustment. Specifically, the second adjustment assembly drives the two driven racks toward each other. After being elastically reset and driven to contract by the first elastic member, they are further contracted a second time until the telescopic adjustment mechanism contracts to the user's desired tightening force, thereby canceling the second adjustment assembly's drive on the two driven racks. At the same time, the second adjustment assembly locks the movement of the two driven racks away from each other, ensuring that the telescopic adjustment mechanism remains in the state of the secondary adjusted contraction force for stable wearing, thereby completing the secondary fine-tuning of the telescopic adjustment mechanism by the second adjustment assembly.

[0040] Therefore, the telescopic adjustment mechanism in this solution can first perform a preliminary adjustment on the size of the wearing space of the wearable device through the first adjustment component, so as to achieve a relatively quick adjustment to initially adjust the wearable device to be suitable for the user to wear. After completing the preliminary adjustment, the telescopic adjustment mechanism is further adjusted to have a certain tightening force by driving the second adjustment component for secondary fine-tuning, thereby completing the final adjustment of the telescopic adjustment mechanism. Compared with the telescopic adjustment mechanism in the prior art, during the adjustment process, the user needs to constantly operate the adjustment knob, which is relatively time-consuming and labor-intensive, to complete the entire telescopic adjustment process. When the adjustment mechanism in this solution is in use, since it has preliminary adjustment and secondary fine-tuning, and after the preliminary adjustment is completed, the telescopic adjustment mechanism can be preliminarily adapted to the human body, so during the secondary fine-tuning, the user only needs to drive the two driven racks closer to each other by the second adjustment component so that the telescopic adjustment mechanism can further have a certain contraction force. In this case, the initial adjustment can be made by directly pulling the driven rack or the strap connected to the driven rack, making the initial adjustment process relatively simple and quick. The distance required to drive the two driven racks closer together for the secondary fine-tuning is also very short, making the secondary fine-tuning process also simple and quick. This eliminates the need for the user to perform time-consuming and laborious adjustment operations when using the telescopic adjustment mechanism of this solution, thereby improving the convenience of using the telescopic adjustment mechanism and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0042] Figure 1 This is a structural diagram of an embodiment of the telescopic adjustment mechanism of the present invention;

[0043] Figure 2 for Figure 1 Structural view of the telescopic adjustment mechanism from another perspective;

[0044] Figure 3 for Figure 1 A schematic diagram of the exploded structure of the telescopic adjustment mechanism from one perspective;

[0045] Figure 4 for Figure 3 Schematic diagram of the exploded structure of the telescopic adjustment mechanism from another perspective;

[0046] Figure 5A cross-sectional schematic diagram of the clutch structure of the second adjustment assembly of the telescopic adjustment mechanism of the present invention in a state of being in conduction and transmitting to the driving gear;

[0047] Figure 6 A cross-sectional schematic diagram of the clutch structure of the second adjustment assembly of the telescopic adjustment mechanism of the present invention in a state of blocking transmission to the driving gear;

[0048] Figure 7 for Figure 1 A schematic structural diagram of the telescopic adjustment mechanism without the upper shell of the mounting carrier;

[0049] Figure 8 for Figure 7 A one-way diagram of the adjustment knob of the middle telescopic adjustment mechanism and the exploded structure of the middle frame;

[0050] Figure 9 for Figure 8 Schematic diagram of the adjustment knob of the middle telescopic adjustment mechanism and the exploded structure of the middle frame from another perspective;

[0051] Figure 10 for Figure 8 Schematic diagram of the assembly structure of the pawl and adjustment knob in the stop assembly of the telescopic adjustment mechanism;

[0052] Figure 11 for Figure 8 A schematic diagram of the exploded structure of the middle frame and reset assembly of the middle telescopic adjustment mechanism from a one-way perspective;

[0053] Figure 12 for Figure 11 A schematic diagram of the exploded structure of the middle frame and reset assembly of the middle telescopic adjustment mechanism from another perspective;

[0054] Figure 13 for Figure 11 Schematic diagram of the exploded structure of the reset assembly and transmission assembly of the telescopic adjustment mechanism;

[0055] Figure 14 for Figure 13 A schematic diagram of the exploded structure of the transmission assembly and driving gear of the telescopic adjustment mechanism from a one-way perspective;

[0056] Figure 15 for Figure 13 Schematic diagram from another perspective of the exploded structure of the transmission assembly and driving gear of the telescopic adjustment mechanism.

[0057] Description of Figure Numbers:

[0058]

[0059]

[0060] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0062] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0063] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0064] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0065] Please refer to Figures 1 to 6The present invention provides a telescopic adjustment mechanism 100. In one embodiment of the present invention, the telescopic adjustment mechanism 100 includes a mounting carrier 1, a first adjustment component 3, and a second adjustment component 5. The first adjustment component 3 includes a driving gear 31, two driven racks 33, and a first elastic member 35. The driving gear 31 is rotatably mounted on the mounting carrier 1. The two driven racks 33 are respectively engaged with opposite sides of the driving gear 31. The first elastic member 35 is disposed between the mounting carrier 1 and the driving gear 31. The second adjustment component 5 is disposed on the mounting carrier 1. The second adjustment component 5 is used to drive the two driven racks 33 to move closer together for a second contraction after the two driven racks 33 are driven closer together by the first elastic member 35 to contract. The second adjustment component 5 can also lock the movement of the two driven racks 33 away from each other.

[0066] The telescopic adjustment mechanism 100 described above can be used in a wearable device, which can be a head-mounted display device. The head-mounted display device can include a display host, a rear housing, and two straps. The display host can be used to display an augmented or virtual display. The rear housing and the display host are spaced apart from each other. One end of the two straps can be connected to opposite ends of the display host, while the other end can be slidably inserted into opposite ends of the rear housing. In this case, the mounting carrier 1 in the telescopic adjustment mechanism 100 can be formed directly from a portion of the rear housing, or it can be a separate mounting carrier 1 provided separately from the rear housing, providing a mounting position for the first adjustment component 3 and the second adjustment component. Similarly, the two driven racks 33 in the telescopic adjustment mechanism 100 can be formed directly from a portion of the two straps, or they can be separate, independent driven racks 33 provided separately from the two straps, and drive the two straps to tighten or extend as they approach each other. In some embodiments, the wearable device can also be a waist-worn device. The waist-worn device may include a main body (e.g., a component for physical therapy or body shaping) and two straps connected to the main body. In this case, the mounting carrier 1 and the active portion may be spaced apart relative to each other, and the two straps may also be directly connected to the two driven racks 33. Therefore, this application does not limit the specific type of device in which the telescopic adjustment mechanism 100 can be used; only devices capable of telescopic adjustment using similar two straps may employ the telescopic adjustment mechanism 100 described in this application. Furthermore, the mounting carrier 1 in the telescopic adjustment mechanism 100 may be used to provide a mounting position so that the various components of the telescopic adjustment mechanism 100 can be assembled into a single unit. As described above, the mounting carrier 1 may be formed directly as part of the structure of the device to which the telescopic adjustment mechanism 100 is subsequently applied (e.g., the rear housing of the head-worn device described above); however, it may also be a separate component provided separately from the housing. In this case, the mounting carrier 1 may be formed by a combination of multiple plates, multiple columns, or a combination of multiple plates and multiple columns. The driving gear 31 of the first adjustment assembly 3 can be used to mesh with the two driven racks 33, so that the two driven racks 33 can move closer or farther away synchronously to ensure the uniform tightening of the telescopic adjustment mechanism 100. The first elastic member 35 (which can be a spring or other elastic plastic member, and can specifically be a spiral spring for ease of installation) can drive the driving gear 31 to remain in a state where the two driven racks 33 are not stretched and adjusted. When the two driven racks 33 are not pulled for telescopic adjustment, the two driven racks 33 can move closer to or farther away from each other. Therefore, the driving gear 31, the two driven racks 33, and the first elastic member 35 can be said to constitute a coarse adjustment mechanism.That is, at this point, the user can directly pull the two driven racks 33 or the straps connected to the driven racks 33 to enclose the two straps to form a wearing size slightly larger than the wearing portion, making it easier to wear the wearable device. After wearing, the first elastic member 35 can drive the driving gear 31 to rotate and reset, thereby driving the two driven racks 33 to move closer together and reset, thereby initially tightening the two straps. Because the telescopic adjustment mechanism 100 currently only has the first elastic member 35 to provide elastic force for limiting and tightening, the tightening force of the two adjustment and telescopic mechanisms is limited, making it difficult to ensure stable wearing. Therefore, it is necessary to further use the second adjustment component 5 to drive the two driven racks 33 closer together to further increase the tightening force of the telescopic adjustment mechanism 100, and to lock the two driven racks 33 from moving away from each other after further approaching each other. In this way, after completing a coarse adjustment through the first adjustment component 3, a second fine adjustment is further performed through the second adjustment component 5 to lock the state. Among them, the second adjustment component 5 drives the two driven racks 33 to move relatively close to each other for secondary contraction, including the driving mode in which the second adjustment component 5 directly drives the two driven racks 33 to move closer to each other, and of course, it can also include the driving mode in which the second adjustment component 5 indirectly drives the two driven racks 33 to move closer to each other, for example: the second adjustment component 5 can indirectly drive the two driven racks 33 to move closer by driving the driving gear 31 to rotate. Similarly, the second adjustment component 5 locks the movement of the two driven racks 33 away from each other, including the second adjustment component 5 directly locking the two driven racks 33, and of course, it also includes indirectly locking the two driven racks 33, for example: the second adjustment component 5 can indirectly lock the two driven racks 33 by locking the driving gear 31.

[0067] When applied to a wearable device, the telescopic adjustment mechanism 100 of the present invention can sequentially adjust the size of the wearable device's wearing space through the first adjustment component 3 and the second adjustment component 5. Specifically, the adjustment can be performed first through the first adjustment component 3, while the second adjustment component 5 is not in operation. At this point, the driving gear 31 and the two driven racks 33 in the first adjustment component 3 are both in a state of free bidirectional rotation. At this point, the user can directly pull the two driven racks 33 or the straps connected to the driven racks 33 in the wearable device to adjust the length of the wearable device, so that the size of the wearable device's wearing space can be larger than the size of the human head, making it easier for the user to quickly wear the wearable device. As the user pulls the two driven racks 33 or the straps connected to the driven racks 33 in the wearable device to adjust the length of the wearable device, the driving gear 31 meshing with the two driven racks 33 is driven, driving the first elastic member 35 to undergo corresponding elastic deformation. Therefore, after the initial wearing process is complete and the pulling force on the two driven racks 33 or the straps connected to the driven racks 33 in the wearable device is removed, the first elastic member 35, under the action of its deforming elastic force, can drive the driving gear 31 to rotate and reset. During this rotational reset process, the two driven racks 33 are driven to move closer together and contract, thereby completing the initial adjustment of the telescopic adjustment mechanism 100 through the first adjustment assembly 3. Adjustment can then be performed by the second adjustment assembly 5. Specifically, the second adjustment assembly 5 drives the two driven racks 33 closer together. After being elastically reset and forced to contract by the first elastic member 35, they are further contracted a second time until the telescopic adjustment mechanism 100 contracts to the user's desired tightening force, at which point the second adjustment assembly 5's drive on the two driven racks 33 is removed. Simultaneously, the second adjustment assembly 5 locks the movement of the two driven racks 33 away from each other, ensuring that the telescopic adjustment mechanism 100 remains in the state of contraction after the second adjustment, allowing for stable wear. This completes the secondary fine-tuning of the telescopic adjustment mechanism 100 through the second adjustment assembly 5.

[0068] Therefore, the telescopic adjustment mechanism 100 in this embodiment can initially adjust the size of the wearable device's wearing space through the first adjustment component 3, thereby quickly adjusting the wearable device to a preliminary fit for the user. After completing the preliminary adjustment, the telescopic adjustment mechanism 100 can be further adjusted to a certain tightening force by driving the second adjustment component 5 for secondary fine-tuning, thereby completing the final adjustment of the telescopic adjustment mechanism 100. This is compared to the telescopic adjustment mechanism 100 in the prior art, which requires the user to continuously operate the adjustment knob 51, which is time-consuming and labor-intensive, to complete the entire telescopic adjustment process. During use, the adjustment mechanism in this embodiment has both preliminary adjustment and secondary fine-tuning. After the preliminary adjustment is completed, the telescopic adjustment mechanism 100 is initially adapted to the human body. Therefore, for secondary fine-tuning, the user only needs to use the second adjustment component 5 to drive the two driven racks 33 closer together to further achieve a certain contraction force. At this time, the initial adjustment can be made by directly pulling the driven rack 33 or the strap connected to the driven rack 33, making the initial adjustment process relatively simple and quick. The distance required to drive the two driven racks 33 closer together for the secondary fine adjustment is also very short, making the secondary fine adjustment process also very simple and quick. This eliminates the need for the user to perform time-consuming and laborious adjustment operations when using the telescopic adjustment mechanism 100 in this solution, thereby improving the convenience of using the telescopic adjustment mechanism 100 and enhancing the user experience.

[0069] Please refer to Figures 3 to 6 In one embodiment of the present invention, the second adjusting component 5 includes an adjusting knob 51 and a clutch structure 53. The adjusting knob 51 is rotatably provided on the mounting carrier 1; the clutch structure 53 is provided on the mounting carrier 1, and when the adjusting knob 51 is rotated in a first direction, the clutch structure 53 can conduct the transmission of the adjusting knob 51 to the driving gear 31, so as to drive the two driven racks 33 to approach each other, and can lock the movement of the two driven racks 33 away from each other; when the adjusting knob 51 is rotated in a second direction opposite to the first direction, the clutch structure 53 can block the transmission of the adjusting knob 51 to the driving gear 31, and can release the lock on the movement of the two driven racks 33 away from each other.

[0070] In this embodiment, the adjustment knob 51 can be used to provide an operating position, so that when the user drives the adjustment knob 51 to rotate in a first direction (which can be either clockwise or counterclockwise), the clutch structure 53 can be used to transmit the transmission from the knob to the driving gear 31. In this case, while the adjustment knob continues to rotate in the first direction, tightening the adjustment knob can drive the driving gear 31 through the clutch structure 53, thereby driving the two driven racks 33 closer together, thereby further tightening the telescopic adjustment mechanism 100. At the same time, during this process, the clutch structure 53 can also lock the relative movement of the two driven racks 33. When the wearable device needs to be removed, the adjustment knob 51 can be driven to rotate in a second direction (which can be either clockwise or counterclockwise), and the clutch structure 53 can block the transmission to the driving gear 31 and release the lock on the movement of the two racks away from each other. At this point, the driving gear 31 and the driven rack 33 can once again move in both directions, allowing them to be quickly extended and removed by pulling the two driven racks 33 or the straps connected to them. As can be seen, the second adjustment assembly 5, formed by the adjustment knob 51 and the clutch structure 53, allows the user to adjust the tension of the second adjustment assembly 5 by rotating the adjustment knob 51 via the clutch structure 53, which in turn drives the driving gear 31 to rotate, thereby driving the two driven racks 33 to move. In other words, one adjustment knob 51 drives one driving gear 31 to rotate, which in turn drives two driven gears to move. This allows the two driven racks 33 to move stably and synchronously when adjusting the tension by rotating the adjustment knob 51, thereby ensuring smooth and reliable tensioning of the two straps in the wearable device. Furthermore, rotating the adjustment knob 51 is relatively simple, simplifying the adjustment process of the second adjustment assembly 5, further improving convenience and enhancing the user experience. At the same time, the second adjustment component 5 indirectly realizes the contraction adjustment of the two driven racks 33 by driving the active gear 31, so that the number of the second adjustment components 5 can be set to one, that is, corresponding to the number of the active gears 31. At this time, the structure of the telescopic adjustment mechanism 100 can be simplified, which is conducive to improving the convenience of manufacturing the telescopic adjustment mechanism 100. Of course, it should be noted that the present application is not limited to this. In other embodiments, the second adjustment component 5 can also directly drive the two driven racks 33. At this time, the number of adjustment components can be set corresponding to the two driven racks 33, and each second adjustment component 5 can include a sliding switch. Among them, the two sliding switches in the two second adjustment components 5 can be slidably set on the mounting carrier 1 and respectively connected to the two driven racks 33. In this way, by driving the two sliding switches close to each other, it is also possible to drive the two driven racks 33 close to each other.Afterwards, after the two sliding switches drive the driven racks 33 to approach the position, the sliding switches can be pressed and limited on the mounting carrier 1 by structures such as a pressing piece, thereby limiting the movement of the two driven racks 33.

[0071] Further, please refer to Figures 2 to 12 The clutch structure 53 includes a transmission assembly 531, a stop assembly 537 and a reset assembly 540; the transmission assembly 531 is movably arranged between the driving gear 31 and the adjusting knob 51. When the adjusting knob 51 rotates in the first direction, the transmission assembly 531 can move to conduct the transmission of the adjusting knob 51 to the driving gear 31; the stop assembly 537 can block the adjusting knob 51 from rotating in the second direction, or block the transmission structure from rotating in the second direction when the adjusting knob 51 is conducting the rotation of the driving gear 31, so as to lock the movement of the two driven racks 33 away from each other; when the adjusting knob 51 rotates in the second direction, the reset structure can drive the transmission assembly 531 to move to block the transmission of the adjusting knob 51 to the driving gear 31.

[0072] In this embodiment, the transmission assembly 531 is driven to move so that when it is in different positions, it can conduct or block the transmission of the adjusting knob 51 to the driving gear 31 (such as Figure 5 The figure shows a state diagram of blocking the transmission to the driving gear 31. Figure 6(See Figure 5 for a schematic diagram of the state in which transmission to the driving gear 31 is enabled.) Rotating the adjustment knob 51 in the first direction also drives the driving gear 31 in the first direction. When the adjustment knob 51 is rotated in the second direction, the adjustment knob 51 releases its drive of the driving gear 31 via the transmission assembly 531. After the adjustment knob 51 drives the driving gear 31 in the first direction, driving the two driven racks 33 toward each other for further locking, a stop assembly 537 is used to block the adjustment knob 51 from rotating in the second direction, or to block the transmission assembly from rotating in the second direction, thereby locking the two driven racks 33 from moving away from each other. This ensures that the telescopic adjustment mechanism 100 can be worn while in a state where the contraction force has been fine-tuned twice by the second adjustment assembly 5. The reset mechanism can be used to drive the transmission assembly 531 to block the adjustment knob 51 from transmitting the contraction force to the driving gear 31 when the user removes the wearable device. Among them, since the clutch mechanism blocks the rotation of the adjusting knob 51 in the second direction through the stop assembly 537, or blocks the rotation of the transmission structure in the second direction when the adjusting knob 51 is turned on to rotate the driving gear 31, and the number of the adjusting knob 51 and the transmission assembly 531 are both one. In this case, it is convenient for the stop assembly 537 to block and limit a single adjusting knob 51 or transmission assembly 531, thereby facilitating the manufacturing convenience of the stop assembly 537. Of course, it should be noted that the present application is not limited to this. In other embodiments, the transmission assembly 531 itself may have a self-locking function, in which case there is no need to additionally set up the stop assembly 537. For example: the transmission assembly 531 includes a worm wheel and a worm, and the worm can be mounted on the mounting carrier 1 and coaxially arranged with the driving gear 31 so as to drive the driving gear 31 to rotate when it rotates. The worm can be mounted on the adjusting knob 51 via a mounting bracket perpendicular to the rotation axis of the worm wheel and the adjusting knob 51. The mounting bracket can rotate relative to the adjusting knob 51 around the rotation axis of the adjusting knob 51, and the worm can be meshed with the adjusting knob 51 via a bevel gear set. In this case, when the adjusting knob 51 is driven to rotate in a first direction, the mounting bracket and the worm can rotate with the knob until the worm meshes with the turbine. The mounting bracket is abutted and limited by the limiting ribs on the mounting carrier 1 and will no longer rotate with the adjusting knob 51 in the first direction, ensuring that the worm is in meshing with the turbine. Furthermore, the adjusting knob 51 is also provided with a driving rib, so that after the adjusting knob 51 is abutted and limited by the limiting ribs on the mounting carrier 1, the inclined surfaces of the driving rib and the mounting bracket can be engaged to drive the mounting bracket to undergo elastic deformation, ensuring that the adjusting knob 51 can continue to rotate in the first direction.When the adjustment knob 51 is rotated in the first direction, the adjustment knob 51 can drive the worm to rotate through the bevel gear set, thereby connecting the transmission between the driving gear 31 and the adjustment knob 51. After the adjustment knob 51 is stopped, the worm wheel and the worm can self-lock, causing the driving gear 31 to be locked, thereby locking the driven rack 33. When the wearable device needs to be removed, the adjustment knob 51 can be driven to rotate in the second direction. At this time, the driving rib on the adjustment knob 51 and the mounting frame are in flat contact and can no longer drive the worm to deform, thereby driving the worm to separate from the turbine, so that the two no longer have a transmission relationship, thereby blocking the transmission of the driving gear 31 and unlocking the two driven racks 33.

[0073] Further, please refer to Figures 5 to 9 When the adjusting knob 51 rotates in a first direction, the transmission assembly 531 can move to conduct the transmission to the driving gear 31; when the adjusting knob 51 rotates in a second direction opposite to the first direction, the reset assembly 540 can be abutted and driven by the adjusting knob 51 to drive the transmission assembly 531 to move to block the transmission to the driving gear 31.

[0074] In this embodiment, rotating the adjustment knob 51 in the second direction abuts against the reset assembly 540, thereby driving the transmission assembly 531 to block transmission to the driving gear 31. This allows the user to rotate the adjustment knob 51 in the first direction to activate the transmission assembly 531, while rotating the adjustment knob 51 in the second direction resets the transmission assembly 531 and blocks transmission to the driving gear 31. In other words, by controlling both activation and deactivation of transmission to the driving gear 31 through the same adjustment knob 51, the number of user-operated keys can be simplified, further enhancing the ease of manufacturing the telescopic adjustment mechanism 100. Furthermore, this arrangement allows the transmission assembly 531 to be controlled to activate and deactivate the driving gear 31 through a simple rotational operation, further enhancing the ease of use of the second adjustment assembly 5.

[0075] Further, please refer to Figures 5 to 9The reset assembly 540 includes a sliding plate 541 and a rotating claw 542. The sliding plate 541 is slidably provided on the mounting carrier 1 and can abut against the transmission assembly 531; the rotating claw 542 is rotatably provided on the sliding plate 541, and the rotation direction of the rotating claw 542 is perpendicular to the rotation direction of the adjustment rotation; the adjusting knob 51 is provided with abutting teeth 511. When the adjusting knob 51 is rotated along the first direction, the rotating claw 542 can be abutted and driven to rotate by the abutting teeth 511; when the adjusting knob 51 is rotated along the second direction, the rotation of the rotating claw 542 is limited and can be abutted and driven to slide by the abutting teeth 511, so that the sliding plate 541 drives the transmission assembly 531 to move to block the transmission to the driving gear 31.

[0076] In this embodiment, the sliding direction of the sliding plate 541 of the reset assembly 540 can be the same as the sliding direction of the transmission assembly 531 when it moves to conduct or block the transmission to the driving gear 31, so that its movement is the same as the sliding movement of the transmission assembly 531, thereby facilitating the reset assembly 540 to abut and drive the transmission assembly 531. The rotating claw 542 of the reset assembly 540, because it rotates, can adapt to the rotational movement of the adjustment knob 51. Therefore, when the adjustment knob 51 rotates in the first direction, the rotating claw 542 can be abutted and driven by the adjustment knob 51, thereby not affecting the adjustment knob 51 driving the driving gear 31 to rotate in the first direction to drive the two driven racks 33 to further approach and retract. When the adjusting knob 51 rotates in the second direction, the pawl 542 can be abutted and restrained by the sliding plate 541 or the mounting carrier 1. This means that when the adjusting knob 51 abuts the inclined surface or curved surface of the abutting tooth 511 against the inclined surface or curved surface of the pawl 542, the pawl 542 cannot be driven to rotate. Instead, the pawl 542 can be squeezed, transmitting the squeezing force to the sliding plate 541, thereby driving the sliding plate 541 to slide and reset. Thus, the reset member, including the sliding plate 541 and the pawl 542, can be more evenly adapted to the sliding movement of the transmission assembly 531 and the rotation of the adjusting knob 51, and can be easily abutted and driven. This also reduces the number of parts in the reset assembly 540, thereby ensuring that the reset assembly 540 effectively resets the transmission assembly 531 and improving its manufacturing convenience. Furthermore, more importantly, the reset assembly 540 still uses a purely mechanical structure to reset the transmission assembly 531, without involving electrical circuits or air circuits, thereby improving user safety. Further, please refer to his 5. Figure 6 as well as Figure 11The transmission assembly 531 can be formed with an abutment step 535, which is arranged circumferentially around the transmission assembly 531. The rotating plate is sleeved on the outside of the transmission assembly 531 and can abut the abutment step 535. In this case, the sliding plate 541 and the transmission assembly 531 are sleeved together, which can make the installation of the two more compact, thereby reducing the overall volume of the telescopic adjustment mechanism 100 and improving the convenience of subsequent installation. At the same time, this arrangement can also ensure that the transmission assembly 531 is in a uniform abutment relationship with the sliding member along the circumference, thereby improving the stability of the sliding plate 541's abutment and drive. In addition, there are at least two rotating claws 542, each of which is evenly spaced from the rotation axis of the adjustment knob 51. The provision of at least two rotating claws 542 ensures that the adjustment knob 51 is subjected to uniform force along the circumference, thereby improving the rotational stability of the adjustment knob 51 during the adjustment process. At the same time, the sliding plate 541 can also be uniformly abutted and driven by the adjusting knob 51 in the circumferential direction, so that the sliding plate 541 is evenly stressed and moves more stably, thereby further improving the stability of the sliding plate 541 abutting and driving the transmission assembly 531. Figure 9 、 Figure 11 as well as Figure 12 The reset assembly 540 may further include a second elastic member 543 (which may be a spring or other elastic plastic member). The second elastic member 543 is disposed between the mounting carrier 1 and the rotating claw 542 and can drive the rotating claw 542 to rotate and reset and / or the sliding plate 541 to slide and reset. In this case, the second elastic member 543 can ensure that the rotating claw 542 and the sliding plate 541 are effectively reset, so that the transmission assembly 531 can be stably abutted and driven to reset the next time. The rotating claw 542 and the sliding plate 541 are connected together. Therefore, a second elastic member 543 is disposed between the mounting carrier 1 and the rotating claw 542. When the outer knob 516 is rotated in the first direction, the rotating claw 542 is driven to rotate and reset. When the adjustment knob 51 is rotated in the second direction, the rotating claw 542 and the sliding plate 541 are abutted by the outer knob 516 and driven to slide in a direction close to the driving gear 31, and reset. Of course, two second elastic members 543 can also be provided to elastically reset the rotational return of the pawl 542 and the sliding return of the sliding plate 541, respectively. Furthermore, it should be noted that when the direction from the driving gear 31 to the adjustment knob 51 is from top to bottom, the sliding plate 541 and pawl 542 can also be reset under the action of gravity. It should also be noted that in some embodiments, the reset assembly 540 can also include a telescopic cylinder and a push rod. In this way, when the steering angle sensor detects that the adjustment knob 51 is rotating in the second direction, this signal can be transmitted to the telescopic cylinder, thereby driving the cylinder to drive the push rod to abut and drive the transmission assembly 531 to move and reset.

[0077] Please refer to Figures 3 to 6 In one embodiment of the present invention, the adjusting knob 51 includes an inner knob 512 and an outer knob that are nested together. The inner knob 512 is provided with a first abutment portion, and the outer knob 516 is provided with a second abutment portion. When the outer knob 516 drives the inner knob 512 to rotate in a first direction through the cooperation between the second abutment portion and the first abutment portion, the transmission assembly 531 can move to conduct the transmission of the inner knob 512 to the driving gear 31; when the outer knob 516 rotates relative to the inner knob 512 in the second direction, the reset assembly 540 can be driven by the outer knob 516 to drive the transmission assembly 531 to move to block the transmission to the driving gear 31.

[0078] In this embodiment, the adjustment knob 51 is configured as a nested inner knob 512 and outer knob 516. When the outer knob 516 is driven to rotate the inner knob 512 in a first direction, the inner knob 512 drives the transmission assembly 531, thereby driving the driving gear 31 and the driven rack 33. When the outer knob 516 is driven to rotate relative to the inner knob 512 in a second direction, the outer knob 516 abuts against the sliding plate 541 of the reset assembly 540, thereby driving the transmission assembly 531 to move and reset, thereby blocking transmission to the driving gear 31. This enables different motion functions through the different components of the adjustment knob 51, improving the stability of the various motion functions. Furthermore, it can be said that both the transmission assembly 531 and the reset assembly 540 detect the rotation direction of the adjustment knob 51 using a purely mechanical mechanism. That is, when the inner knob 512 is driven to rotate along with the outer knob 516, it is determined to be rotating in the first direction, which in turn drives the transmission assembly 531 to move to enable transmission to the driving gear 31. As long as the outer knob 516 rotates relative to the inner knob 512, it can be determined that it is rotating in a second direction opposite to the first direction, thereby driving the reset assembly 540 to reset the transmission assembly 531. At this time, a purely mechanical mechanism is used to identify the rotation direction of the adjustment knob 51, so that the telescopic adjustment in this part of the structure does not involve circuits and air circuits, etc., thereby further improving the safety of use. Among them, an elastic body (such as a spring or other elastic plastic part, etc.) can be installed on the inner knob 512, and the elastic body abuts against the second abutting portion to drive the second abutting portion to abut against the first abutting portion. In this way, when the outer knob 516 rotates in the first direction, the abutment between the second abutting portion and the first abutting portion can drive the inner knob 512 to rotate accordingly. When the outer knob 516 rotates in the second direction, the inner knob 512 and the transmission assembly 531 are in transmission communication, and the transmission assembly 531 is abutted and limited by the stop assembly 537, preventing rotation in the second direction. This prevents the inner knob 512 from rotating in the second direction, allowing the outer knob 516 to overcome the elastic force of the elastic body and rotate relative to the inner knob 512 in the second direction. The first and second abutment portions can specifically be plate structures, block structures, or column structures. It should also be noted that the present application is not limited to this. In other embodiments, the adjustment knob 51 can also be a knob component, in which case a steering angle sensor can be provided. The transmission assembly 531 may include a supporting plate, an upper piston section, a first cylinder, a lower piston section, a second cylinder and a stop rod; the supporting plate can be fixedly mounted on the mounting carrier 1; the upper piston section can be rotatably mounted on the supporting plate through a one-way bearing so that it can only be driven to rotate along the first direction by the adjusting knob 51; the first cylinder can be connected to the upper piston section, and the lower piston section can be installed on the telescopic end of the first cylinder; the second cylinder can be installed on the supporting plate, and the stop rod can be installed on the piston section of the second cylinder.Thus, when the angle sensor detects that the adjustment knob 51 is rotated in the first direction, the signal indicating the first direction of rotation can be transmitted to the first cylinder and the second cylinder, so that the first cylinder drives the lower piston segment to engage with the driving gear 31 for transmission, and the second cylinder drives the stopper rod to engage and limit the driving gear 31. Furthermore, when the steering angle sensor detects that the adjustment knob 51 is rotated in the second direction, the first cylinder and the second cylinder can respectively drive the lower piston segment and the stopper rod to reset.

[0079] Further, please refer to Figure 5 、 Figure 8 、 Figure 9 as well as Figure 10 When the outer knob 516 drives the inner knob 512 to rotate in the first direction, the end of the stop component 537 close to the inner knob 512 can be driven by the knob to prevent the other end of the stop component 537 from abutting and blocking the transmission component 531.

[0080] In this embodiment, the stop assembly 537 not only blocks the inner knob 512 from rotating in the second direction, but also abuts and blocks the transmission assembly 531 from moving into abutment with the inner knob 512, thereby maintaining the transmission assembly 531 in a non-conductive state with the driving gear 31. This allows the same structure to be used for both limiting the rotation of the inner knob 512 in the second direction and limiting the transmission assembly 531 from being in a non-conductive state with the driving gear 31. This simplifies the structure of the telescopic adjustment mechanism 100 and improves its manufacturing convenience. Furthermore, when the outer knob 516 rotates relative to the inner knob 512 in a second direction opposite to the first direction, the stop assembly 537 is promptly driven to rotate until it no longer abuts and blocks the transmission assembly 531, allowing it to promptly move into abutment with the inner knob 512 for transmission, thereby improving the timeliness of the contact between the adjustment knob 51 and the driving gear 31. The inner knob 512 is provided with protruding teeth 513 along its rotational circumference. The stop assembly 537 can be specifically a pawl 538, which is rotatably mounted on the carrier 1. One end of the pawl 538 abuts against the protruding teeth 513 to prevent the inner knob 512 from rotating in the second direction, and the other end abuts against an end of the blocking transmission assembly 531 toward the adjustment knob 51, thereby preventing the latter from moving and abutting against the inner knob 512 to transmit the transmission from the adjustment knob 51 to the driving gear 31. When the outer knob 516 drives the inner knob 512 to rotate in the first direction, the end of the pawl 538 abutting against the protruding teeth 513 can also be abutted and driven by the inner knob 512, so that the other end of the pawl 538 is not abutted and blocked by the transmission assembly 531. At this point, the abutment between the pawl 538 and the protruding teeth 513 on the inner knob 512 allows the inner knob 512 to rotate in the second direction while restricting rotation in the second direction. Because the pawl 538 is a purely mechanical mechanism, the stop assembly 537 does not involve electrical circuits or air circuits, thereby improving the safety of the stop assembly 537. Furthermore, the stop assembly 537 may also include a torsion spring 539 to promptly drive the pawl 538 to rotate and reset, thereby stably performing a cyclic abutment and blocking operation on the transmission assembly 531. It should also be noted that in other embodiments, the stop assembly 537 may also include a pneumatic cylinder and a stop post connected to the cylinder, so that the cylinder drives the stop post to be inserted into the inner knob 512 or the transmission assembly 531, thereby limiting the rotation of the driving gear 31 in the second direction and the rotation of the driven gear away from each other. At this time, an additional blocking structure composed of a cylinder and a blocking plate connected to the cylinder can be used to abut and block the end of the transmission component 531 close to the inner knob 512.

[0081] Further, please refer to Figure 5 、 Figure 8 、 Figure 9 ,as well as Figures 11 to 15 The transmission assembly 531 includes a transmission member 532 and a third elastic member 536. The transmission member 532 is slidably inserted into the driving gear 31 along the rotation axis of the driving gear 31 and the inner knob 512, and can be driven to rotate by the driving gear 31; the third elastic member 536 (which can be a spring or other elastic plastic member) is provided between the driving gear 31 and the transmission member 532, and can drive the transmission member 532 to slide in the direction close to the inner knob 512, so that the transmission member 532 and the inner knob 512 are in contact for transmission; the end of the stop assembly 537 away from the inner knob 512 can be in contact with the end of the transmission member 532 toward the driving gear 31 to prevent the transmission member 532 from sliding until it is in contact with the inner knob 512 for transmission.

[0082] In this embodiment, the transmission member 532 is inserted and installed within the driving gear 31, establishing an abutting transmission relationship with the driving gear 31 and also making the installation of the two more compact. When the outer knob 516 drives the inner knob 512 to rotate in the first direction, the inner knob 512 can abut and drive the pawl 538 in the stop assembly 537 to rotate, thereby preventing the transmission member 532 from being blocked. At this time, under the action of the third elastic member 536, the transmission member 532 can promptly slide in a direction close to the inner knob 512 to abut and transmit with the inner knob 512, thereby achieving an indirect transmission connection between the adjusting knob 51 and the driving gear 31 through the transmission member 532. The transmission member 532 formed by the transmission member 532 and the third elastic member 536 can ensure that the transmission assembly 531 promptly and effectively moves to the position to conduct transmission to the driving gear 31 after the outer knob 516 drives the inner knob 512 to rotate. Furthermore, the transmission assembly 531 is a purely mechanical structure, without any electrical or pneumatic circuits involved, thus enhancing its safety. The transmission member 532, the driving gear 31, and the inner knob 512 can be driven by tooth-to-tooth engagement, or alternatively, by surface-to-surface friction. The transmission member 532 can be provided with an abutment step 535 for abutment with the sliding plate 541 in the sliding assembly.

[0083] Further, please refer to Figure 9 、 Figure 14 as well as Figure 15The driving gear 31 is provided with an insertion groove 311 on the side facing the inner knob 512, and the insertion groove 311 is arranged in a ring shape around the rotation axis of the driving gear 31; the transmission member 532 is a ring structure with openings at both ends, and one of the opposite ends of the transmission member 532 is inserted into the insertion groove 311, and abuts against the groove wall of the insertion groove 311 for transmission, and the third elastic member 536 is arranged between the groove wall of the insertion groove 311 and the transmission member 532; the inner knob 512 is provided with an insertion column 514 on the side facing the driving gear 31, and the insertion column 514 is inserted into the end of the transmission member 532 away from the insertion groove 311, and can abut against the transmission member 532 for transmission.

[0084] In this embodiment, an insertion groove 311 for installing the transmission member 532 is provided in the driving gear 31, and the transmission member 532 is provided as an annular structure, and the inner knob 512 is also inserted into the transmission member 532 for abutment transmission. In this way, the transmission member 532, the driving gear 31, and the inner knob 512 are all distributed very compactly, which is conducive to further reducing the overall volume of the adjustment knob 51. In order to improve the stability of the abutment transmission between the transmission member 532, the driving gear 31, and the inner knob 512, a first driving tooth 313 can be provided in the insertion groove 311 of the driving gear 31, and a second driving tooth 515 can be provided on the connecting column of the inner knob 512. At this time, a first meshing tooth 533 can be provided on the outer side of the end of the transmission member 532 close to the driving gear 31 for meshing with the first driving tooth 313. A second engaging tooth 534 may be provided on the inner side of one end of the transmission member 532 close to the inner knob 512 for engaging with the second driving tooth 515 .

[0085] Please refer to Figures 1 to 5In one embodiment of the present invention, in order to simplify the structure of the mounting carrier 1 and improve the convenience of installing the first adjustment component 3 and the second adjustment component 5, the mounting carrier 1 may include a base plate 11, a middle frame 13 and a middle frame 15. At this time, the driving gear 31, the two driven racks 33 and the first elastic member 35 of the first adjustment component 3 can all be installed on the base plate 11. The inner knob 512 and the outer knob 516 of the adjustment knob 51 of the second adjustment component 5 can be clamped and installed between the middle frame 13 and the middle frame 15, and the middle frame 15 is connected to the base plate 11. The transmission component 531 of the clutch structure 53 of the second adjustment component 5 can be installed on the driving gear 31, and when the outer knob 516 drives the inner knob 512 to rotate in the first direction, the transmission member 532 at the end away from the driving gear 31 can pass through the middle frame 13 and abut against the inner knob 512 for transmission. The stop assembly 537 can be mounted on the side of the middle frame 13 facing away from the bottom plate 11, ensuring that the pawl 538 in the stop assembly 537 can abut and block the end of the transmission member 532 away from the driving gear 31. The sliding plate 541 in the reset assembly 540 in the clutch structure 53 can be sleeved on the outside of the transmission member 532 of the transmission assembly 531. At the same time, the rotating claw 542 in the reset assembly 540 can pass through the middle frame 13 and abut against the protruding tooth 513 on the outer knob 516, thereby being limited by the abutment on the middle frame 13 and unable to rotate along with the outer knob 516 in the second direction.

[0086] In one embodiment of the present invention, the telescopic adjustment mechanism 100 of the present application can be used as follows: when the wearable device needs to be worn, the transmission member 532 in the second adjustment component 5 does not transmit the transmission to the driving gear 31, so that the driving gear 31 is in a state of free rotation in both directions. At this time, the user can directly pull the two driven racks 33 or the strap connected to the driven racks 33 to extend them to enclose a wearing space that is larger than the size of the user's wearing part, thereby facilitating the user to quickly wear it to the wearing part. After the wearer is initially worn through the first adjustment component 3, the first elastic member 35, under the action of its deformation elastic force, drives the driving gear 31 to rotate and reset, so that the strap can automatically and quickly complete the initial tightening. To improve the wearing stability of the wearable device, the outer knob 516 in the second adjustment component 5 can be driven to drive the inner knob 512 to rotate in the first direction. At this time, the inner knob 512 can abut against the pawl 538 in the stop assembly 537 to prevent the transmission member 532 in the transmission assembly 531 from abutting and blocking it, so that the transmission member 532, driven by the third elastic member 536, slides upward to abut against the inner knob 512 for transmission, thereby realizing that the transmission member 532 conducts the transmission between the adjusting knob 51 and the driving gear 31. Therefore, when the outer knob 516 is further rotated to drive the inner knob 512 in the first direction, the driving gear 31 can be driven to rotate in the first direction in sequence through the inner knob 512 and the transmission member 532, thereby driving the two driven racks 33 to further approach each other and tighten. When the tightening force required by the user is adjusted, the force acting on the outer knob 516 can be canceled. At this time, the inner knob 512 will not rotate in a second direction opposite to the first direction due to the abutment and limiting effect of the pawl 538 in the stop assembly 537. This also achieves that both the driving gear 31 and the driven rack 33 are limited, thereby ensuring that the wearable device is stably worn on the human body under a certain tightening force. Later, when it is necessary to remove the wearable device, the outer knob 516 can be driven to overcome the elastic force and rotate relative to the inner knob 512 in the second direction. At this time, the outer knob 516 can abut against the rotating claw 542 and the sliding plate 541 in the reset assembly 540 through the convex teeth 513, driving it to slide down. Then, the sliding plate 541 abuts against the transmission member 532 to slide down and reset, thereby disengaging from the inner knob 512. At the same time, the end of the pawl 538 in the stop assembly 537 away from the inner knob 512 can be promptly rotated and reset under the action of the torsion spring 539, and can again abut against the side of the transmission member 532 away from the driving gear 31, thereby preventing it from sliding upward and abutting against the inner knob 512. At this time, the separation of the transmission member 532 and the inner knob 512 allows the driving gear 31 to rotate freely in both directions again, so that the user can directly pull the two driven racks 33 or the strap to quickly remove the wearable device.

[0087] The present invention also proposes a wearable device, which includes a telescopic adjustment mechanism 100. The specific structure of the telescopic adjustment mechanism 100 refers to the above-mentioned embodiment. Since the wearable device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. Among them, the wearable device can be a head-mounted display device. The head-mounted display device can include a display host, a rear shell, and two straps; the display host can be used to display an enhanced display image or a virtual display image, the rear shell and the display host are arranged relative to each other, and one end of the two straps can be connected to the opposite ends of the display host, and the other end can be slidably inserted into the two ends of the rear shell. In this case, the mounting carrier 1 in the telescopic adjustment mechanism 100 can be directly formed by a part of the structure on the rear shell, or it can be an additional mounting carrier 1 set independently of the rear shell, which can be used to provide a mounting position for the first adjustment component 3 and the second adjustment to be installed. Similarly, the two driven racks 33 in the telescopic adjustment mechanism 100 can also be directly formed by a part of the structure on the two strap parts. Of course, they can also be two independent driven racks 33 additionally provided on the two strap parts, and drive the two strap parts to tighten or stretch in the process of approaching each other. In some embodiments, the wearable device can also be a waist-worn device. The waist-worn device may include a main body (such as a component for physical therapy or shaping of the human body) and two strap parts connected to the main body. In this case, the mounting carrier 1 and the active part can be arranged at a relative interval, and the two strap parts can also be directly connected to the two driven racks 33. Therefore, the specific type of equipment used by the telescopic adjustment mechanism 100 is not limited in this application. Only equipment that can use similar two strap parts for telescopic adjustment can use the telescopic adjustment mechanism 100 in this application.

[0088] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present description and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A telescopic adjustment mechanism, characterized in that: include: Install the carrier; a first adjustment assembly, the first adjustment assembly comprising a driving gear, two driven racks, and a first elastic member, the driving gear being rotatably mounted on the mounting carrier, the two driven racks being respectively engaged with opposite sides of the driving gear, and the first elastic member being disposed between the mounting carrier and the driving gear; as well as a second adjustment assembly, the second adjustment assembly being disposed on the mounting carrier, and being used to drive the two driven racks toward each other for a second contraction after the two driven racks are driven toward each other by the first elastic member to contract, and the second adjustment assembly can also lock the movement of the two driven racks away from each other; The second adjustment component includes: an adjusting knob rotatably disposed on the mounting carrier; and A clutch structure, comprising a transmission assembly, a stop assembly, and a reset assembly; The transmission assembly is movably disposed between the driving gear and the adjusting knob, and when the adjusting knob rotates in a first direction, the transmission assembly can move to conduct transmission from the adjusting knob to the driving gear; The stop assembly can prevent the adjusting knob from rotating in the second direction, or prevent the transmission assembly from rotating in the second direction when the adjusting knob is turned on to rotate the driving gear, so as to lock the two driven racks from moving away from each other; When the adjusting knob rotates in the second direction, the reset assembly can drive the transmission assembly to move to block the transmission of the adjusting knob to the driving gear.

2. The telescopic adjustment mechanism according to claim 1, wherein: When the adjusting knob rotates in the second direction, the reset assembly can be abutted and driven by the adjusting knob to drive the transmission assembly to move to block the transmission of the adjusting knob to the driving gear; The reset component includes: a sliding plate, the sliding plate being slidably disposed on the mounting carrier and being abutted against the transmission assembly; and a rotating claw rotatably disposed on the sliding plate, wherein the rotating claw has a rotation direction perpendicular to the rotation direction of the adjusting knob; The adjusting knob is provided with an abutment tooth, and when the adjusting knob is rotated in a first direction, the rotating claw can be abutted by the abutment tooth and driven to rotate; When the adjusting knob rotates in the second direction, the rotating claw may be abutted and limited by the sliding plate or the mounting carrier, and the adjusting knob squeezes the rotating claw to transmit the squeezing force to the sliding plate, thereby driving the sliding plate to slide and reset.

3. The telescopic adjustment mechanism according to claim 2, wherein: The transmission assembly is formed with an abutting step, which is arranged around the circumference of the transmission assembly. The sliding plate is sleeved on the outer side of the transmission assembly and can abut against the abutting step. And / or, the number of the rotating claws is at least two, and they are evenly spaced from the rotation axis of the adjusting knob; And / or, the reset assembly includes a second elastic member, which is provided between the mounting carrier and the rotating claw and can drive the rotating claw to rotate and reset and / or the sliding plate to slide and reset.

4. The telescopic adjustment mechanism according to claim 2 or 3, characterized in that: The adjusting knob comprises an inner knob and an outer knob which are nested together, the inner knob is provided with a first abutting portion, and the outer knob is provided with a second abutting portion; When the outer knob drives the inner knob to rotate in the first direction through the cooperation between the second abutting portion and the first abutting portion, the inner knob drives the transmission assembly, and the transmission assembly can move to conduct the transmission of the inner knob to the driving gear; When the outer knob rotates relative to the inner knob in the second direction, the outer knob abuts against the sliding plate of the reset assembly to drive the transmission assembly to move to block the transmission of the inner knob to the driving gear.

5. The telescopic adjustment mechanism according to claim 4, wherein: One end of the transmission assembly is mounted on the driving gear and can be driven to rotate by the driving gear. The transmission assembly can also slide relative to the driving gear to the other end of the transmission assembly and abut against the inner knob for transmission, so as to conduct the transmission of the inner knob to the driving gear. The stop assembly is rotatably provided on the mounting carrier, one end of the stop assembly is used to abut against and prevent the inner knob from rotating in the second direction, and the other end is used to abut against and prevent the transmission assembly from sliding until it abuts against and transmits the rotation of the inner knob; When the outer knob drives the inner knob to rotate in the first direction, one end of the stop assembly close to the inner knob can be abutted and driven by the knob, so that the other end of the stop assembly is not abutted and blocked by the transmission assembly.

6. The telescopic adjustment mechanism according to claim 5, characterized in that: The transmission assembly includes a transmission member and a third elastic member. The transmission member is slidably inserted into the driving gear along the rotation axis of the driving gear and the inner knob, and can be abutted and driven to rotate by the driving gear. The third elastic member is provided between the driving gear and the transmission member, and can drive the transmission member to slide in a direction close to the inner knob, so that the transmission member abuts against the inner knob for transmission; One end of the stopping component away from the inner knob can abut against one end of the transmission member facing the driving gear to prevent the transmission member from sliding until it abuts against the inner knob for transmission.

7. The telescopic adjustment mechanism according to claim 6, wherein: An insertion groove is provided on a side of the driving gear facing the inner knob, and the insertion groove is arranged in a ring shape around the rotation axis of the driving gear; The transmission member is an annular structure with openings at both ends. One of the two opposite ends of the transmission member is inserted into the insertion groove and abuts against the groove wall of the insertion groove for transmission. The third elastic member is provided between the groove wall of the insertion groove and the transmission member. An inserting column is provided on a side of the inner knob facing the driving gear. The inserting column is inserted into an end of the transmission member away from the inserting slot and can abut against the transmission member for transmission.

8. A wearable device, characterized in that: It comprises the telescopic adjustment mechanism according to any one of claims 1 to 7.

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