CN115681765A - Telescopic adjusting mechanism and wearable device - Google Patents

Abstract

The invention discloses a telescopic adjusting mechanism and wearable equipment. The first adjusting assembly comprises a driving gear, driven racks and a first elastic piece, the driving gear is rotatably arranged on the mounting carrier, the two driven racks are respectively meshed with the two sides of the driving gear, and the first elastic piece is arranged between the mounting carrier and the driving gear; the second adjusting assembly comprises an adjusting knob and a transmission structure, the adjusting knob is rotatably arranged on the mounting carrier, and when the adjusting knob rotates along the first direction, the adjusting knob can drive the transmission structure to conduct transmission on the driving gear and lock the rotation of the driving gear in the second direction; when the adjusting knob rotates along the second direction, the adjusting knob can drive the transmission structure to block the transmission of the driving gear and release the locking of the rotation of the driving gear in the second direction. The technical scheme of the invention can improve the use experience of the user.

Description

Telescopic adjusting mechanism and wearable device

Technical Field

The invention relates to the technical field of head-mounted equipment, in particular to a telescopic adjusting mechanism and wearing equipment applying the same.

Background

At present, wearing equipment such as AR product and VR product can be adjusted two bandage pieces through flexible adjustment mechanism to stretch out and draw back in order to adapt to different users' wearing, partial wearing equipment. The telescopic adjusting mechanism of the wearing device in the related art generally includes an adjusting knob, a driving gear, a driven rack connected to two straps or directly disposed on the straps, a stopping pawl for performing unidirectional stopping on the driving gear, and an unlocking paddle. At the moment, the adjusting knob is driven to rotate along one direction (which can be defined as clockwise), and the two binding band pieces can be driven to mutually approach to contract through the transmission of the driving gear and the two driven racks; after the two binding band pieces are adjusted in place, the stop pawl abuts against the driving gear in a limiting mode, so that the two binding band pieces are limited and fixed relatively, and wearing of the wearing equipment is completed. When the wearable device needs to be taken down, the locking pawl is driven to be far away from the driving gear through the driving unlocking shifting piece, so that the locking of the locking pawl to the driving gear is released, the adjusting knob can be driven to rotate along the other direction (which can be defined as anticlockwise) to drive the two binding belt pieces to be far away from each other for extension, and the wearable device is taken down.

However, in the actual use of the telescopic adjustment mechanism, because the driving gear is limited by the limit of the stop pawl, the driving gear only rotates along the clockwise direction, and the corresponding two driven racks can be driven by the driving gear. Therefore, when the user needs to wear the belt, the user can only adjust the two belt members in place by continuously driving the adjusting and rotating knob for operation. And the distance that the two binding band pieces are driven by the driving gear and the driven rack to move is limited when the adjusting knob rotates for one circle, so that the operation time for a user to adjust the two binding band pieces in place by driving the adjusting knob is longer. Especially, when the wearing size that two bandage pieces enclose to close and form is less than the wearing size that current user needs, need the user to stir the unblock plectrum in advance and drive the locking pawl and keep away from the driving gear, just can further drive two bandage pieces through drive adjust knob and extend earlier after removing the locking of locking pawl to the driving gear, contract the regulation afterwards. Consequently, wearing equipment's among the correlation technique flexible adjustment mechanism uses comparatively inconveniently, has led to influencing user's use and has experienced.

Disclosure of Invention

The invention mainly aims to provide a telescopic adjusting mechanism and aims to improve the use experience of a user.

In order to achieve the above object, the present invention provides a telescopic adjustment mechanism comprising:

mounting a carrier;

the first adjusting assembly comprises a driving gear, two driven racks and a first elastic piece, the driving gear is rotatably arranged on the mounting carrier, the two driven racks are respectively meshed with two opposite sides of the driving gear, and the first elastic piece is arranged between the mounting carrier and the driving gear; and

the second adjusting assembly comprises an adjusting knob and a transmission structure, the adjusting knob is rotatably arranged on the mounting carrier, and when the adjusting knob rotates along a first direction, the adjusting knob can drive the transmission structure to conduct transmission on the driving gear and lock the rotation of the driving gear in a second direction opposite to the first direction;

when the adjusting knob rotates along the second direction, the adjusting knob can drive the transmission structure to block the transmission of the driving gear and unlock the rotation of the driving gear in the second direction.

Optionally, the driving gear includes a first gear part and a second gear part connected to each other on a rotation axis thereof, opposite sides of the first gear part are engaged with the two driven racks, and the first elastic member is disposed between the mounting carrier and the first gear part;

when the adjusting knob rotates along the first direction, the transmission structure can conduct transmission on the second gear part and lock the rotation of the second gear part in the second direction;

when the adjusting knob rotates along the second direction, the transmission structure can block the transmission of the second gear part and unlock the rotation of the second gear part in the second direction.

Optionally, the transmission structure comprises:

the bearing plate is slidably arranged on the mounting carrier and is positioned between the adjusting knob and the second gear part;

the piston piece can rotatably penetrate through the bearing plate, the rotating axis of the piston piece and the rotating axes of the adjusting knob and the second gear part are arranged in a collinear mode, and one end, close to the adjusting knob, of the piston piece can be abutted to the adjusting knob to drive the piston piece to rotate; and

the first pawl is arranged on one side, facing the second gear part, of the bearing plate;

when the adjusting knob rotates along a first direction, the adjusting knob can drive the bearing plate to slide along a direction close to the second gear part, so that the piston part is conducted to transmit the transmission to the second gear part, and the first pawl locks the rotation of the second gear part in a second direction; when the adjusting knob rotates along the second direction, the adjusting knob can drive the bearing plate to slide and reset along the direction close to the adjusting knob.

Optionally, the adjusting knob includes an inner knob and an outer knob, which are sleeved with each other, and when the outer knob drives the inner knob to rotate along a first direction, the inner knob may abut against and drive the piston member to rotate and drive the bearing plate to slide along a direction close to the second gear portion;

when the outer knob rotates relative to the inner knob along a second direction, the outer knob can drive the bearing plate to slide and reset along a direction close to the adjusting knob.

Optionally, the piston member is provided with a first engaging tooth at one end close to the inner knob and a second engaging tooth at one end close to the second gear portion;

the inner knob is provided with a first driving tooth at a position corresponding to the piston piece, and the first driving tooth is meshed with the first meshing tooth, so that the inner knob can be abutted to drive the piston piece to rotate;

the second gear part is provided with a second driving tooth at a position corresponding to the second meshing tooth, and when the bearing plate is driven by the inner knob in a butting mode, the second meshing tooth can be meshed with the second driving tooth so as to conduct transmission to the second gear part.

Optionally, the piston member is of an annular structure, the inner side of one end of the piston member, which is close to the inner knob, is provided with the first engaging teeth, and the outer side of one end of the piston member, which is close to the second gear portion, is provided with the second engaging teeth;

the inner knob is provided with a connecting column at a position corresponding to the piston piece, the connecting column is inserted into the piston piece, and the side wall surface of the connecting column is provided with the first driving teeth;

the second gear part is towards one side of interior knob is equipped with the spread groove, the spread groove is used for enclosing the cell wall that closes its notch and is equipped with the second drives the tooth the loading board by when interior knob butt drives, the piston spare can insert in the spread groove, so that second meshing tooth mesh in the second drives the tooth.

Optionally, the inner knob is further provided with a third driving tooth, and the bearing plate is provided with a third engaging tooth engaged with the third driving tooth at a position opposite to the third driving tooth;

when the outer knob drives the inner knob to rotate along the first direction, the inner knob drives the bearing plate to slide along the direction close to the second gear part through the matching of the third driving teeth and the third meshing teeth.

Optionally, the transmission structure further comprises a sliding plate, a second elastic member and a third elastic member;

the sliding plate is slidably arranged on the mounting carrier, the second elastic piece is arranged between the mounting carrier and the sliding plate, and when the bearing plate is driven to slide by the abutting of the inner knob, the second elastic piece can drive the sliding plate to abut against the bearing plate so as to prevent the bearing plate from sliding and resetting in the direction close to the adjusting knob;

when the outer knob rotates relative to the inner knob along a second direction, the outer knob can drive the sliding plate to slide, and the direction in which the outer knob drives the sliding plate to slide is opposite to the direction in which the second elastic piece drives the sliding plate to slide

The third elastic piece is arranged between the second gear part and the piston piece so as to drive the piston piece, the second pawl and the bearing plate to slide and reset along the direction close to the adjusting knob.

Optionally, the transmission structure further comprises a second pawl, and the second pawl is rotatably arranged on the sliding plate;

a fourth meshing tooth is arranged on the outer side of the outer knob, and one end of the second pawl can abut against the fourth meshing tooth to prevent the outer knob from rotating along the second direction;

when the outer knob rotates along the second direction, the outer knob drives the sliding plate to slide by abutting against the second pawl.

The invention also provides a wearable device which comprises the telescopic adjusting mechanism.

When the telescopic adjusting mechanism is applied to the wearable device, the size of the wearing space of the wearable device can be preliminarily adjusted through the first adjusting component. Specifically, the driving gear in the first adjusting assembly is not in transmission communication with the second adjusting assembly in the initial state, so that the driving gear can freely rotate in two directions. At this moment, the user can directly pull two driven racks or the bandage part connected to the driven racks in the wearing device to adjust the elongation of the wearing device, so that the size of the wearing space of the wearing device can be larger than that of the wearing part (such as the head) of the human body, and the wearing device can be worn by the user conveniently and quickly and directly. And after wearing human position to the cancellation is to connecting in two driven racks or wearing equipment in the power of drawing of the bandage piece of this driven rack, first elastic component can order about the driving gear under the effect of its deformation elasticity and rotate and reset, and drive two driven racks and be close to the shrink each other at the rotation process that resets, thereby accomplish the primary control to telescopic machanism. In order to improve the wearing stability of the wearable device, secondary fine adjustment can be performed later. Specifically, the user can drive the adjusting knob in the second adjustment to rotate in a first direction (which may be one of clockwise and counterclockwise) to drive the transmission structure to conduct the transmission to the driving gear. At the moment, the adjusting knob is rotated along the first direction, the driving gear can be driven to rotate along the first direction, and then the two driven racks are driven to continuously approach relatively until the telescopic adjusting mechanism contracts to the tightening force required by the user, so that the driving of the adjusting knob can be cancelled, and the secondary adjustment of the telescopic mechanism is completed. When the driving of the adjusting knob is cancelled, the driving gear can be locked by the transmission structure in the second direction (the other direction can be clockwise or anticlockwise) opposite to the first direction, so that the driving gear which is in transmission communication with the transmission structure can not rotate along the second direction, and the telescopic adjusting mechanism is guaranteed to be stable and limited under the state of having certain contraction force.

Therefore, the arrangement of the structure of the telescopic adjusting mechanism in the scheme ensures that a user can firstly and directly carry out primary adjustment on the size of the wearing space of the wearing equipment through the first adjusting component when in use, so as to reach comparatively fast and adjust wearing equipment to preliminary suitable user and wear. After finishing preliminary adjustment, the telescopic adjusting mechanism is further adjusted to have certain tightening force by driving the second adjusting component to finish final adjustment of the telescopic adjusting mechanism. So compare in the telescopic adjusting mechanism among the prior art at the adjustment process, need the user to carry out the operation of comparatively wasting time and energy drive adjust knob always and just can accomplish whole telescopic adjusting process. When the adjusting mechanism in the scheme is used, the adjusting mechanism is preliminarily adjusted and secondarily fine-adjusted, and after the preliminary adjustment is completed, the telescopic adjusting mechanism can be preliminarily adapted to a human body, so that only a user is required to drive the adjusting knob to rotate for a short time (or even can rotate for less than one circle) during the secondary fine adjustment, and the telescopic adjusting mechanism is ensured to further have certain contraction force. At this moment, the process of preliminary regulation and secondary fine setting is all comparatively simple swift, need not the user and carries out the regulation operation that comparatively wastes time and energy, just also can improve the convenience that telescopic adjusting mechanism used to user's use is experienced has been promoted.

When the wearable device needs to be taken down, the wearable device can be rotated along the second direction by the adjusting knob driving the second adjusting assembly, the transmission structure is driven to block the transmission of the driving gear, and the locking of the driving gear in the rotation of the second direction is released. At this moment, the driving gear among the first adjusting part has also obtained the unblock once more and can carry out two-way free rotation, just also convenience of customers can directly stimulate these two driven racks or connect in the bandage spare of this driven rack and make flexible adjustment mechanism extend, and then can be quick the realization take off wearing equipment. Consequently, flexible adjustment mechanism's in this application unblock operation also is same simple swift, also need not the user and carries out comparatively loaded down with trivial details and rotate through drive adjust knob and drive driving gear pivoted operation, just can realize keeping away from the extension each other with two driven racks, just also further improves the convenience that flexible adjustment mechanism used in this scheme to further promote user's use and experience.

In addition, the transmission structure of flexible regulation in this scheme except can switching on the transmission to the driving gear, can also play the locking effect to the rotation of driving gear in the second side. That is, realized further realizing the locking to the driving gear after accomplishing flexible regulation through this transmission structure, so make need not additionally to set up locking structure and lock the driving gear after accomplishing flexible regulation to be favorable to simplifying flexible adjustment mechanism's structure, with the convenience that improves its processing manufacturing.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a telescopic adjustment mechanism according to the present invention;

FIG. 2 is another schematic view of the telescoping adjustment mechanism of FIG. 1;

FIG. 3 is a schematic view of a further perspective of the telescoping adjustment mechanism of FIG. 1;

FIG. 4 is a schematic view of an exploded view of the telescoping adjustment mechanism of FIG. 1;

FIG. 5 is another schematic view of the explosive structure of the telescoping adjustment mechanism of FIG. 1;

FIG. 6 is a schematic view of the transmission structure of the telescopic adjustment mechanism of the present invention in a state of transmitting to the driving gear without conduction;

FIG. 7 is a schematic view of the transmission structure of the telescopic adjustment mechanism of the present invention in a state of transmitting to the driving gear;

FIG. 8 is a partial schematic structural view of the telescoping adjustment mechanism of FIG. 1;

FIG. 9 is a schematic view of a partially exploded view of the telescoping adjustment mechanism of FIG. 8;

FIG. 10 is another schematic view of a partially exploded view of the telescoping adjustment structure of FIG. 8;

FIG. 11 is a schematic view of the exploded configuration of the adjustment knob of FIG. 9;

FIG. 12 is another schematic view of the exploded configuration of the adjustment knob of FIG. 9;

FIG. 13 is a schematic view from a partially exploded perspective of the telescoping adjustment mechanism of FIG. 9;

FIG. 14 is another perspective view of the partially exploded configuration of the telescoping adjustment mechanism of FIG. 9;

FIG. 15 is a schematic view of an exploded view of the drive structure of the telescoping adjustment mechanism of the present invention;

FIG. 16 is another perspective view of the explosive structure of the transmission structure of the telescoping adjustment mechanism of the present invention;

FIG. 17 is a schematic view of an exploded configuration of the first adjustment assembly of the telescoping adjustment mechanism of the present invention;

fig. 18 is another schematic view from an exploded view of the first adjustment assembly of the telescoping adjustment mechanism of the present invention.

The reference numbers indicate:

the implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that all directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the expression "and/or" as used throughout is meant to encompass three juxtaposed aspects, exemplified by "A and/or B", including either the A aspect, or the B aspect, or aspects in which both A and B are satisfied. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 18, in an embodiment of the present invention, the telescopic adjusting mechanism 100 includes a mounting carrier 10, a first adjusting assembly 30 and a second adjusting assembly 50, the first adjusting assembly 30 includes a driving gear 31, two driven racks 33 and a first elastic member 35, the driving gear 31 is rotatably disposed on the mounting carrier 10, the two driven racks 33 are respectively engaged with two opposite sides of the driving gear 31, and the first elastic member 35 is disposed between the mounting carrier 10 and the driving gear 31; the second adjusting assembly 50 includes an adjusting knob 51 and a transmission structure 53, the adjusting knob 51 is rotatably disposed on the mounting carrier 10, and when the adjusting knob 51 rotates along a first direction (which may be one of clockwise and counterclockwise), the adjusting knob 51 may drive the transmission structure 53 to conduct transmission on the driving gear 31, and lock rotation of the driving gear 31 along a second direction (which may be the other of clockwise and counterclockwise) opposite to the first direction; when the adjustment knob 51 is rotated in the second direction, the adjustment knob 51 may actuate the transmission structure 53 to block the transmission of the driving gear 31 and unlock the rotation of the driving gear 31 in the second direction.

The telescopic adjustment mechanism 100 described above may be applied to a wearable device, wherein the wearable device may be a head-mounted display device. The head-mounted display device can comprise a display host, a rear shell and two binding pieces; the back casing is relative interval setting with the demonstration host computer, and the one end of two bandage pieces can be connected respectively in the relative both ends of demonstration host computer, and the both ends of locating the back casing are inserted to the other end slidable. At this time, the mount carrier 10 in the telescopic adjustment mechanism 100 may be directly formed by a part of the structure on the rear housing; of course, the mounting carrier 10 may be provided separately from the rear housing, and may be used to provide mounting positions for mounting the first adjusting unit 30, the second adjusting unit 50, and the like. Likewise, the two driven racks 33 of the telescopic adjustment mechanism 100 may be formed directly by a portion of the structure of the two straps; of course, two driven racks 33 may be additionally provided independently of the two binding members, and the two driven racks 33 may be respectively connected to the two binding members, so as to correspondingly drive the two driven racks 33 to tighten or elongate when the two driven racks 33 are close to each other or relatively far away from each other. In some embodiments, the wearable device may also be a waist-worn device. The waist-worn device may include a main body portion (e.g., a part for physical therapy or shaping of a human body, etc.), and two strap members connected to the main body portion. In this case, the mounting carrier 10 and the main body may be disposed at an opposite interval, and the two binding members may be directly connected to the two driven racks 33. Therefore, the specific type of the device to which the telescopic adjustment mechanism 100 is applied is not limited in this application, and the telescopic adjustment mechanism 100 in this application can be applied to a device that can be telescopically adjusted like two straps.

Further, the mounting carrier 10 of the telescoping adjustment mechanism 100 may be used to provide a mounting location for assembling the first adjustment assembly 30, the second adjustment assembly 50 of the telescoping adjustment mechanism 100, and other components of the telescoping adjustment mechanism 100 into a unitary structure. As described above, it may be a partial structure of a housing to which the subsequent telescopic adjustment mechanism 100 is applied to the apparatus (a rear housing in the head-mounted display apparatus as above); or a component provided separately from the housing, in which case the mounting carrier 10 may be formed by combining a plurality of plates, or by combining a plurality of columns, or by combining a plurality of plates and a plurality of columns. The first adjusting assembly 30 can be used for primarily adjusting the size of a space enclosed by the strap of the wearing device, and comprises a driving gear 31, two driven racks 33 and a first elastic piece 35. So the user can be through two bandage spares of direct pulling for two driven rack 33 carry out the motion of keeping away from each other thereupon, thereby can be quick enclose the bandage spare and close the size of the space of wearing that forms and adjust to be greater than the size that the position was worn to the human body, with convenient user's wearing. During the movement of the driven racks 33 away from each other, the driving gear 31 is driven by the driving gear to rotate in the second direction due to the engagement therebetween, and drives the first elastic member 35 to deform to generate a deformation elastic force. Consequently, wear wearing equipment and the pulling force of cancellation effect on the bandage piece after, driving gear 31 can rotate under the effect of the deformation elasticity of first elastic component 35 and reset, drives two driven rack 33 and carries out the motion that is close to each other, and two bandage pieces that realize wearing equipment can be preliminary adaptation and laminate in the position of wearing of human body. In order to facilitate the installation of the first elastic element 35, the first elastic element 35 may be a spiral spring, so as to directly sleeve the driving gear 31 on the rotating shaft rotatably connected to the installation carrier 10. At this time, the inner connecting arm of the inner end of the spiral spring can be inserted into the spiral spring, and the outer connecting arm of the outer end can be inserted into the mounting carrier 10. In addition, after wearing the wearing device preliminarily, the tightening force given by the first elastic member 35 is limited, and the limit of the rotation of the driving gear 31 in the second direction is not stable enough. Therefore, it is further possible to readjust the tightening force of the telescopic adjustment mechanism 100 by the second adjustment assembly 50, and to favorably lock the rotation of the driving gear 31 in the second direction after the adjustment. Specifically, the second adjustment assembly 50 includes an adjustment knob 51 and a transmission structure 53, wherein the adjustment knob 51 can be used to provide an operation position, and at least a part of the structure is exposed to the outside for the user to perform a rotation operation. The transmission structure 53 may be used to conduct transmission to the driving gear 31 and limit rotation of the driving gear 31 in the second direction. When the adjusting knob 51 is rotated in the first direction, the driving gear 31 is driven by the transmission structure 53 to rotate in the first direction, and the two driven racks 33 are driven to further approach each other, so that the telescopic adjusting mechanism 100 has a certain tightening force. Meanwhile, the transmission structure 53 also blocks the rotation of the driving gear 31 in the second direction, so that the driven gear engaged with the driving gear 31 does not move away from each other under the reaction force of the wearing part of the human body after being mutually closed and tightened, thereby ensuring that the telescopic adjustment mechanism 100 can be stably maintained to be worn under the state of having a certain tightening force.

When the telescopic adjusting mechanism 100 of the technical scheme of the invention is applied to a wearable device, the size of the wearing space of the wearable device can be initially adjusted through the first adjusting assembly 30. Specifically, since the driving gear 31 of the first adjustment assembly 30 is not in transmission communication with the second adjustment assembly 50 in the initial state, the driving gear 31 can freely rotate in both directions. At this time, the user may first directly pull the two driven racks 33 or the strap member connected to the driven racks 33 in the wearing device to perform the extension adjustment on the wearing device, so that the size of the wearing space of the wearing device may be larger than the size of the wearing part (e.g., the head) of the human body, thereby facilitating the user to wear the wearing device quickly and directly. After the body part is worn, the pulling force of the two driven racks 33 or the binding piece connected to the driven racks 33 in the wearing device is cancelled, the first elastic piece 35 can drive the driving gear 31 to rotate and reset under the action of the deformation elastic force of the first elastic piece, and the two driven racks 33 are driven to mutually approach and shrink in the rotating and resetting process, so that the primary adjustment of the telescopic mechanism is completed. In order to improve the wearing stability of the wearable device, secondary fine adjustment can be performed later. Specifically, a user may rotate adjustment knob 51 in a first direction (which may be one of clockwise and counterclockwise) to actuate drive structure 53 to engage drive gear 31. At this time, in the process of rotating the adjusting knob 51 along the first direction, the driving gear 31 may be driven to rotate along the first direction, and then the two driven racks 33 are brought to relatively approach each other, until the telescopic adjusting mechanism 100 is contracted to the tightening force required by the user, the driving of the adjusting knob 51 may be cancelled, and the secondary adjustment of the telescopic mechanism is completed. When the driving of the adjusting knob 51 is cancelled, the transmission structure 53 can lock the rotation of the driving gear 31 in a second direction (the other direction may be clockwise or counterclockwise) opposite to the first direction, so that the driving gear 31 in transmission communication with the transmission structure 53 cannot rotate in the second direction, thereby ensuring that the telescopic adjusting mechanism 100 is stably limited in a state with a certain contraction force.

Consequently, the setting of the structure of flexible adjustment mechanism 100 in this scheme for the user can directly carry out preliminary adjustment to the size of a dimension that wears the space of wearing equipment through first adjusting part 30 earlier when using, wears to preliminary suitable user with reaching comparatively quick adjusting to wearing equipment. After the initial adjustment is completed, the final adjustment of the telescopic adjustment mechanism 100 is completed by driving the second adjustment assembly 50 to further adjust the telescopic adjustment mechanism 100 to have a certain tightening force. Compared with the telescopic adjusting mechanism 100 in the prior art, the whole telescopic adjusting process can be completed only by the user always performing the operation of driving the adjusting knob 51 which is time-consuming and labor-consuming in the adjusting process. When the adjusting mechanism in this scheme is used, because it has primary regulation and secondary fine setting, and just make flexible adjusting mechanism 100 can tentatively adapt to the human body after the primary regulation is accomplished, so only need user drive adjust knob 51 to rotate the short time (can rotate even and be less than the round) during secondary fine setting, guarantee that flexible adjusting mechanism 100 can further have certain contractile force can. At this moment, the process of preliminary regulation and secondary fine setting is all comparatively simple swift, need not the user and carries out the regulation operation that comparatively wastes time and energy, just also can improve the convenience that telescopic adjusting mechanism 100 used to user's use experience has been promoted.

When the wearable device needs to be taken down, the adjusting knob 51 of the second adjusting assembly 50 can be driven to rotate along the second direction, the transmission structure 53 is driven to block the transmission of the driving gear 31, and the locking of the rotation of the driving gear 31 in the second direction is released. At this time, the driving gear 31 in the first adjusting assembly 30 is also unlocked again and can rotate freely in two directions, so that the user can directly pull the two driven racks 33 or connect to the strap of the driven rack 33 to extend the telescopic adjusting mechanism 100, and the wearable device can be taken down quickly. Consequently, flexible adjustment mechanism 100's in this application unblock operation also is same simple swift, also need not the user and carries out comparatively loaded down with trivial details and rotates through drive adjust knob 51 and drive driving gear 31 pivoted operation, just can realize keeping away from the extension each other with two driven racks 33, just also further improves the convenience that flexible adjustment mechanism 100 used in this scheme to further promote user's use and experience.

In addition, the transmission structure 53 for telescopic adjustment in the present scheme can not only conduct transmission on the driving gear 31, but also play a role in stopping rotation of the driving gear 31 in the second direction. That is, the transmission structure 53 further realizes locking of the driving gear 31 after telescopic adjustment is completed, so that it is not necessary to additionally provide a locking structure to lock the driving gear 31 after telescopic adjustment is completed, thereby facilitating simplification of the structure of the telescopic adjustment mechanism 100 and improving convenience of processing and manufacturing the same.

Referring to fig. 4 to 7, in an embodiment of the present invention, the driving gear 31 includes a first gear portion 311 and a second gear portion 313 connected to each other on a rotation axis thereof, opposite sides of the first gear portion 311 are engaged with the two driven racks 33, and the first elastic member 35 is disposed between the mounting carrier 10 and the first gear portion 311; when the adjusting knob 51 rotates along the first direction, the transmission structure 53 can conduct transmission to the second gear portion 313 and lock the rotation of the second gear portion 313 along the second direction; when the adjustment knob 51 is rotated in the second direction, the transmission structure 53 may block transmission of the second gear part 313 and release the lock of the rotation of the second gear part 313 in the second direction.

In the embodiment, the driving gear 31 is provided as the first gear part 311 and the second gear part 313 which are coaxial, the first gear part 311 of the bronze drum can provide a meshing position meshed with the two driven racks 33, and the second gear part 313 can provide a conducting position and a stopping position conducted by the transmission structure 53. So can be connected with being connected of different parts respectively on different parts, the possibility of avoiding driven rack 33 and transmission structure 53 to take place to interfere that can be better to be favorable to improving the stability of flexible adjustment mechanism 100 in carrying out flexible regulation process. In addition, the structure of the drive gear 31 is relatively simple, which is advantageous for improving the convenience of processing and manufacturing the drive gear 31. It should be understood that the present application is not limited thereto, and in other embodiments, the driving gear 31 may only include the first gear portion 311, in which case the two driven racks 33 may be engaged with the side peripheral surface of the first gear portion 311, and the first elastic member 35 may be connected between the mounting carrier 10 and a rotating shaft provided on the side end surface of the first gear portion 311 for rotational connection. First gear portion 311 deviates from the side end face of axis of rotation and can be provided with transmission portion and spacing portion to transmission structure 53 realizes switching on the transmission of first gear portion 311 and spacing the rotation of first gear portion 311 in the second direction through with this transmission portion and spacing portion butt.

Further, referring to fig. 4 to fig. 16, the transmission structure 53 includes a carrier plate 531, a piston member 533 and a first pawl 536, the carrier plate 531 is slidably disposed on the mounting carrier 10 and located between the adjusting knob 51 and the second gear portion 313; the piston member 533 is rotatably inserted through the carrier plate 531, a rotation axis of the piston member 533 and rotation axes of the adjusting knob 51 and the second gear portion 313 are arranged in a collinear manner, and one end of the piston member, which is close to the adjusting knob 51, can be abutted by the adjusting knob 51 to drive the piston member to rotate; the first pawl 536 is disposed on a side of the carrier plate 531 facing the second gear portion 313; when the adjustment knob 51 is rotated in the first direction, the adjustment knob 51 may drive the carrier plate 531 to slide in a direction approaching the second gear portion 313, so that the piston member 533 conducts transmission of the second gear portion 313, and the first pawl 536 locks the rotation of the second gear portion 313 in the second direction; when the adjustment knob 51 is rotated in the second direction, the adjustment knob 51 may cause the carrier plate 531 to be slidably reset in a direction approaching the adjustment knob 51.

In this embodiment, the bearing plate 531 can provide a mounting position for conveniently assembling the piston member 533 and the first pawl 536 into a whole, so as to simplify the structure and rapidly mount the transmission structure 53 onto the mounting carrier 10 in a single structure. When the carrier plate 531 approaches the second gear unit 313, the piston member 533 and the first pawls 536 both approach the second gear unit 313 and abut against the second gear unit 313, so that the piston member 533 transmits the abutment of the second gear unit 313 to the piston member 533 and restricts the abutment of the rotation of the piston member 533. At this time, the movement of the piston 533 and the first pawls 536 is unified and simple, so as to facilitate the transmission of the transmission structure 53 to the driving gear 31 and the locking of the rotation of the driving gear 31 in the second direction. In addition, the transmission structures 53 are all pure mechanical structures, and do not involve a circuit, an air passage and the like, so that the application safety of the transmission structures is improved. Here, in order to facilitate the rotational return of the first ratchet 536 and further stably limit the rotation of the second gear unit 313 in the second direction, an elastic body, such as a spring or an elastic plastic member, may be disposed between the first ratchet 536 and the mounting carrier 10. Note that the present invention is not limited to this, and in other embodiments, the transmission structure 53 may include a carrier plate 531, a piston member 533, a cylinder, and a stopper rod connected to the cylinder, and in this case, the carrier plate 531 may come into contact with the second gear portion 313 via the piston member 533 even after the carrier plate 531 comes close to the second gear portion 313. In contrast, after the adjustment is completed, the stopper rod is driven by the cylinder to be inserted between two adjacent teeth on the side circumferential surface of the second gear, so that the rotation of the second gear part 313 is restricted.

Further, referring to fig. 4 to fig. 7, the adjusting knob 51 includes an inner knob 511 and an outer knob 516 that are sleeved with each other, when the outer knob 516 drives the inner knob 511 to rotate along the first direction, the inner knob 511 can abut against and drive the piston member 533 to rotate and drive the carrier plate 531 to slide along the direction close to the second gear portion 313; when the outer knob 516 is rotated in the second direction relative to the inner knob 511, the outer knob 516 may cause the carrier plate 531 to be slidably reset in a direction approaching the adjustment knob 51.

In this embodiment, when the outer knob 516 is rotated along the first direction, the inner knob 511 can directly abut against and drive the carrier plate 531 to approach the second gear portion 313. That is, the adjusting knob 51 can directly drive the bearing plate 531 at this time, so that no additional driving member is required, thereby further simplifying the structure of the telescopic adjusting mechanism 100. The adjusting knob 51 is configured as an inner knob 511 and an outer knob 516 that are sleeved with each other, so that the inner knob 511 rotates along a first direction to drive the carrier plate 531 to slide along a direction close to the second gear portion 313, so that the piston member 533 abuts against the second gear portion 313 to conduct transmission to the second gear portion 313, and the first pawl 536 abuts against the second gear portion 313 to lock rotation of the second gear portion 313 in a second direction. The outer knob 516 rotates in the second direction to drive the carrier plate 531 to slide and reset in the direction away from the second gear portion 313, the piston member 533 disengages from the second gear portion 313 to block the transmission to the second gear portion 313, and the first pawl 536 disengages from the second gear portion 313 to unlock the rotation of the second gear portion 313 in the second direction. Thus, different motion functions can be realized by different parts of the adjusting knob 51, and the working stability of various motion functions can be improved. The outer knob 516 may have a first abutting portion, the inner knob 511 may have a second abutting portion, and an elastic body (e.g., a torsion spring or other elastic plastic member) is mounted on the inner knob 511, and the elastic body abuts against the first abutting portion, so as to urge the first abutting portion to abut against the second abutting portion. Thus, when the outer knob 516 is rotated in the first direction, the inner knob 511 can be driven to rotate along with the first abutting portion and the second abutting portion. When the outer knob 516 rotates in the second direction, the inner knob 511 is in transmission connection with the second gear portion 313 through the piston member 533, and the second gear is abutted and limited by the first pawl 536, so that the inner knob 511 cannot rotate in the second direction, and the outer knob 516 can rotate in the second direction relative to the inner knob 511 by overcoming the elastic force of the elastic body. It should be noted that the present invention is not limited to this, and in other embodiments, the adjustment knob 51 may be a knob member, and in this case, an angle sensor or a steering angle sensor may be provided. The transmission structure 53 may include a bearing plate 531, an upper piston section, a first cylinder, a lower piston section, a second cylinder, and a stop rod; the carrier plate 531 may be fixedly mounted to the mounting carrier 10; the upper piston section is rotatably mounted on the bearing plate 531 and can be abutted and driven by the adjusting knob 51; the first cylinder can be connected to the upper piston section, and the lower piston section can be arranged at the telescopic end of the first cylinder; the second cylinder may be installed at the bearing plate 531, and the stopper rod may be installed at the piston section of the second cylinder. When the angle sensor or the steering angle sensor detects that the adjustment knob 51 is rotated in the first direction in this manner, a signal that is rotated in the first direction is transmitted to the first cylinder and the second cylinder, so that the first cylinder drives the lower piston section to be brought into driving abutment with the second gear portion 313, and the second cylinder drives the stopper rod to be brought into abutment with the second gear portion 313 for limitation. When the angle sensor or the steering angle sensor detects that the adjusting knob 51 rotates in the second direction, the first cylinder and the second cylinder can respectively drive the lower piston section and the stop rod to reset.

Further, referring to fig. 8 to 14 in combination, the piston member 533 is provided with a first engaging tooth 534 at an end close to the inner knob 511, and a second engaging tooth 535 at an end close to the second gear portion 313; the inner knob 511 is provided with a first driving tooth 512 at a position corresponding to the piston member 533, and the first driving tooth 512 is meshed with the first meshing tooth 534, so that the inner knob 511 can abut against and drive the piston member 533 to rotate; the second gear portion 313 is provided with a second driving tooth 315 at a position corresponding to the second engaging tooth 535, and when the carrier plate 531 is driven by the inner knob 511, the second engaging tooth 535 can engage with the second driving tooth 315, so as to conduct transmission to the second gear portion 313.

In this embodiment, the first engagement teeth 534 and the first driving teeth 512 are respectively disposed on the piston member 533 and the inner knob 511, so that the piston member 533 and the inner knob 511 can perform engagement transmission therebetween, thereby improving the stability of transmission therebetween. Similarly, the second engaging teeth 535 and the second driving teeth 315 are respectively disposed on the piston member 533 and the second gear portion 313, so that the piston member 533 and the second gear portion 313 can also perform engaging transmission therebetween, thereby also being beneficial to improving the stability of the transmission therebetween. It should be understood that the present invention is not limited thereto, and in other embodiments, the transmission between the piston member 533 and the inner knob 511 and the second gear portion 313 may be a friction transmission through surface-to-surface contact, or may be an abutting transmission through abutting convex pillars. In addition, in order to facilitate the abutting driving of the inner knob 511 to the bearing plate 531, the inner knob 511 may further include a third driving tooth 514, and the bearing plate 531 is provided with a third engaging tooth 532 engaged with the third driving tooth 514; when the outer knob 516 drives the inner knob 511 to rotate along the first direction, the inner knob 511 drives the carrier plate 531 to slide along the direction close to the second gear portion 313 through the cooperation of the third driving tooth 514 and the third engaging tooth 532. The opposite side surfaces of the third driving tooth 514 and the third engaging tooth 532 in the rotating direction around the adjusting knob 51 can be a straight surface and the other is a cambered surface, so that when the inner knob 511 is rotated by the outer knob 516 in the first direction, the cambered surface on the third engaging tooth 532 can be pressed by the cambered surface on the third driving tooth 514 to drive the bearing plate 531 to slide in the direction close to the first gear part 311.

Further, referring to fig. 9 to 16, the piston member 533 has a ring-shaped structure, and the piston member 533 has a first engaging tooth 534 on an inner side of an end of the inner knob 511 and a second engaging tooth 535 on an outer side of an end of the second gear portion 313; the inner knob 511 is provided with a connecting column 513 at a position corresponding to the piston member 533, the connecting column 513 is inserted into the piston member 533, and a side wall surface of the connecting column 513 is provided with a first driving tooth 512; the side of the second gear portion 313 facing the inner knob 511 is provided with a connecting groove 317, a groove wall of the connecting groove 317 for enclosing to form a notch thereof is provided with a second driving tooth 315, and when the bearing plate 531 is abutted and driven by the inner knob 511, the piston member 533 can be inserted into the connecting groove 317, so that the second engaging tooth 535 is engaged with the second driving tooth 315.

In this embodiment, the piston member 533 is formed in a ring-shaped structure, so that it is convenient to provide the first and second engagement teeth 534 and 535 at the inner and outer sides thereof, respectively, and so that the piston member 533 can be inserted and mounted in the inner knob 511 and the second gear part 313, respectively. This makes the arrangement of the adjustment knob 51, the piston member 533, and the second gear portion 313, etc. more compact, which is advantageous for further reducing the overall volume of the telescopic adjustment mechanism 100, so as to improve the convenience of subsequently installing the telescopic adjustment mechanism 100 in the limited installation space of the wearable device.

Referring to fig. 4 to fig. 7, in an embodiment of the present invention, the transmission structure 53 further includes a sliding plate 537, a second elastic member, and a third elastic member 538; the sliding plate 537 is slidably disposed on the mounting carrier 10, and the second elastic member is disposed between the mounting carrier 10 and the sliding plate 537, and when the carrier plate 531 is pushed by the inner knob 511 to slide, the second elastic member can drive the sliding plate 537 to push against the carrier plate 531, so as to prevent the carrier plate 531 from sliding and resetting in a direction close to the adjusting knob 51; when the outer knob 516 is rotated in a second direction relative to the inner knob 511, the outer knob 516 may drive the sliding plate 537 to slide, and the direction in which the outer knob 516 drives the sliding plate 537 to slide is opposite to the direction in which the second elastic member drives the sliding plate 537 to slide; the third resilient member 538 is disposed between the second gear portion 313 and the piston member 533 to urge the piston member 533, the second pawl 539, and the carrier plate 531 to slidably return in a direction approaching the adjustment knob 51.

In this embodiment, the carrier plate 531 may be provided with a high step 531a and a low step 531b, and the sliding plate 537 may abut against the low step 531b when the outer knob 516 is not driven to rotate in the first direction, as shown in fig. 6. When the outer knob 516 is driven to rotate in the first direction, the inner knob 511 is driven to lower the carrier plate 531 close to the second gear portion 313, so that the piston member 533 and the second gear portion 313 can perform abutting transmission, and the first pawl 536 can limit the rotation of the second gear portion 313 in the second direction. At this time, the piston member 533 descends to approach the second gear portion 313 so that the third elastic member 538 is compressed, and has an urging force to urge the piston member 533 to ascend and return. However, when the carrier plate 531 is pressed by the inner knob 511 to move downward to approach the second gear portion 313, the second elastic member timely drives the sliding plate 537 to slide along the horizontal direction, so that the sliding plate 537 can further press against the high step 531a above the low step 531b as shown in fig. 7, and the carrier plate 531, the piston member 533 and the first pawl 536 can be stably in a state after moving downward, so that the second gear portion 313 can be driven to rotate along with the carrier plate 531 to drive the two driven racks 33 to further tighten during the subsequent rotation of the outer knob 516 along the first direction. Thereafter, when the outer knob 516 is driven to rotate relative to the inner knob 511 along the second direction, the outer knob 516 can abut against and drive the sliding plate 537 to slide and reset so as to be separated from the high step 531a of the bearing plate 531, at this time, the bearing plate 531 can be lifted and reset under the action of the third elastic member 538, and the sliding plate 537 is also changed back to abut against the low step 531b of the bearing plate 531 again. It can be seen that in this application, the outer knob 516 has realized the adoption of pure mechanical structure to the drive that resets of loading board 531 through sliding plate 537, second elastic component and third elastic component 538 to be favorable to further improving the security that the flexible regulation structure used in this application. Further, in order to facilitate that the outer knob 516 can stably abut against and drive the sliding plate 537 only when rotating in the second direction relative to the inner knob 511, the transmission structure 53 further includes a second pawl 539, and the second pawl 539 is rotatably disposed on the sliding plate 537; a fourth engaging tooth 517 is disposed on an outer side of the outer knob 516, and one end of the second pawl 539 can abut against the fourth engaging tooth 517 to block the outer knob 516 from rotating in the second direction; when the outer knob 516 is rotated in the second direction, the outer knob 516 drives the sliding plate 537 to slide by abutting against the second pawl 539. At this time, since the second pawl 539 abuts and limits the rotation of the outer knob 516 in the second direction, when the outer knob 516 is driven to rotate in the second direction relative to the inner knob 511, the fourth meshing teeth 517 on the outer knob 516 can apply a pressing force to the second pawl 539, and the sliding plate 537 mounted on the second pawl 539 can slide, so that the second pawl 539 is transmitted to the sliding plate 537 when being subjected to the pressing force, and the sliding plate 537 is driven to slide and reset. In order to facilitate the rotational return of the second pawl 539 and to further stably limit the rotation of the outer knob 516 in the second direction, an elastic body, such as a spring or an elastic plastic member, may be disposed between the second pawl 539 and the sliding plate 537.

In an embodiment of the present invention, the usage of the telescopic adjusting mechanism 100 in the present application may be as follows: when the wearing device needs to be worn, the transmission structure 53 does not conduct transmission on the second gear of the driving gear 31, so that the driving gear 31 is in a bidirectional free rotation state. At this time, the user may directly pull the two driven racks 33 or the strap connected to the driven racks 33, so that the extension of the two driven racks can enclose a wearing space larger than the size of the wearing part (e.g., the head), thereby facilitating the user to wear the wearing part quickly. And after the preliminary completion was worn, first elastic component 35 can order about the first gear portion 311 of driving gear 31 under the effect of its deformation elasticity and rotate and reset for the tie piece can be automatic accomplish preliminary tightening up fast. Then, in order to improve the wearing stability of the wearable device, the outer knob 516 of the adjustment knob 51 may be driven to rotate in the first direction. During the rotation of the inner knob 511 along the first direction driven by the outer knob 516, the inner knob 511 can abut against the bearing plate 531 driving the transmission structure 53 to slide down to approach the second gear portion 313 of the driving gear 31. So that the piston member 533 can be in abutting transmission with the second gear part 313 and the first pawls 536 can limit the rotation of the second gear part 313 in the second direction. Meanwhile, during the descending process of the carrier plate 531, the sliding plate 537 moves horizontally under the action of the second elastic member, and changes from the low-level step 531b abutting against the carrier plate 531 to the high-level step 531a abutting against the carrier plate 531, so as to block the piston member 533, the first pawl 536 and the carrier plate 531 from sliding upwards. Therefore, at this time, during the process of continuing to rotate the outer knob 516 along the first direction, the second gear portion 313 can be driven to rotate along the first direction through the inner knob 511 and the piston member 533, and the two driven racks 33 can be further tightened by the old. Until the tightening force required by the user is adjusted, the acting force acting on the outer knob 516 can be cancelled, at this time, the second gear portion 313 cannot rotate along the second direction opposite to the first direction due to the abutting limiting effect of the first pawl 536, and therefore the driving gear 31 and the driven rack 33 are both limited, and the wearing equipment is stably worn on the human body under the state of having a certain tightening force. When the wearable device needs to be taken down, the outward turning knob 516 can be driven to rotate in the second direction relative to the inner knob 511 against the elastic force, and at this time, the sliding plate 537 can be driven to move by the abutting action of the second pawl 539 so as to be disengaged from the high step 531a of the bearing plate 531. When the bearing plate 531 is abutted to the sliding plate 537 for limiting, the third elastic member 538 may urge the bearing plate to ascend and return, so that the piston member 533 and the first pawl 536 are both separated from the second gear portion 313, and the driving gear 31 may rotate freely in two directions again, so that the user may directly pull the two driven racks 3337 or the strap member to rapidly remove the wearable device.

The present invention further provides a wearable device, which includes a telescopic adjustment mechanism 100, and the specific structure of the telescopic adjustment mechanism 100 refers to the above embodiments, and since the wearable device adopts all technical solutions of all the above embodiments, the wearable device at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. Wherein, this wearing equipment can be wear display device. The head-mounted display device can comprise a display host, a rear shell and two binding pieces; the back casing is relative interval setting with the demonstration host computer, and the one end of two bandage pieces can be connected respectively in the relative both ends of demonstration host computer, and the both ends of locating the back casing are inserted to the other end slidable. At this time, the mount carrier 10 in the telescopic adjustment mechanism 100 may be directly formed by a part of the structure on the rear housing; of course, the mounting carrier 10 may be provided separately from the rear housing, and may be used to provide a mounting position for mounting the first adjustment assembly 30 and the second adjustment assembly. Likewise, the two driven racks 33 of the telescopic adjustment mechanism 100 may be formed directly by a portion of the structure of the two straps; of course, two driven racks 33 may be additionally provided independently of the two binding members, and the two driven racks 33 may be respectively connected to the two binding members, so as to correspondingly drive the two driven racks 33 to tighten or elongate when the two driven racks 33 are close to each other or relatively far away from each other. In some embodiments, the wearable device may also be a waist-worn device. The waist-worn device may include a main body portion (e.g., a part for physical therapy or shaping of a human body, etc.), and two strap members connected to the main body portion. In this case, the mounting carrier 10 and the driving portion may be disposed at an interval, and the two binding members may be directly connected to the two driven racks 33.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A telescoping adjustment mechanism, comprising:

mounting a carrier;

the first adjusting assembly comprises a driving gear, two driven racks and a first elastic piece, the driving gear is rotatably arranged on the mounting carrier, the two driven racks are respectively meshed with two opposite sides of the driving gear, and the first elastic piece is arranged between the mounting carrier and the driving gear; and

the second adjusting assembly comprises an adjusting knob and a transmission structure, the adjusting knob is rotatably arranged on the mounting carrier, and when the adjusting knob rotates along a first direction, the adjusting knob can drive the transmission structure to conduct transmission on the driving gear and lock the rotation of the driving gear in a second direction opposite to the first direction;

when the adjusting knob rotates along the second direction, the adjusting knob can drive the transmission structure to block the transmission of the driving gear and release the locking of the rotation of the driving gear in the second direction.

2. The telescopic adjustment mechanism according to claim 1, wherein said driving gear includes a first gear portion and a second gear portion connected on a rotational axis thereof, opposite sides of said first gear portion being engaged with two of said driven racks, said first elastic member being provided between said mounting carrier and said first gear portion;

when the adjusting knob rotates along a first direction, the transmission structure can conduct transmission on the second gear part and lock the rotation of the second gear part in a second direction;

when the adjusting knob rotates along the second direction, the transmission structure can block transmission of the second gear part and unlock the rotation of the second gear part in the second direction.

3. A telescoping adjustment mechanism as in claim 2, wherein the transmission structure comprises:

the bearing plate is slidably arranged on the mounting carrier and is positioned between the adjusting knob and the second gear part;

the piston piece is rotatably arranged in the bearing plate in a penetrating mode, the rotating axis of the piston piece and the rotating axes of the adjusting knob and the second gear portion are arranged in a collinear mode, and one end, close to the adjusting knob, of the piston piece can be abutted and driven to rotate by the adjusting knob; and

the first pawl is arranged on one side, facing the second gear part, of the bearing plate;

when the adjusting knob rotates along the first direction, the adjusting knob can drive the bearing plate to slide along the direction close to the second gear part, so that the piston part is conducted to transmit the second gear part, and the first pawl locks the rotation of the second gear part in the second direction; when the adjusting knob rotates along the second direction, the adjusting knob can drive the bearing plate to slide and reset along the direction close to the adjusting knob.

4. The reach adjustment mechanism of claim 3, wherein the adjustment knob includes an inner knob and an outer knob, the inner knob being configured to engage the piston member and drive the carrier plate to slide in a direction adjacent to the second gear portion when the outer knob drives the inner knob to rotate in a first direction;

when the outer knob rotates relative to the inner knob along the second direction, the outer knob can drive the bearing plate to slide and reset along the direction close to the adjusting knob.

5. The reach adjust mechanism of claim 4, wherein the piston member has first engagement teeth at an end proximate the inner knob and second engagement teeth at an end proximate the second gear portion;

the inner knob is provided with a first driving tooth at a position corresponding to the piston piece, and the first driving tooth is meshed with the first meshing tooth, so that the inner knob can be abutted to drive the piston piece to rotate;

the second gear part is provided with second driving teeth at positions corresponding to the second meshing teeth, and when the bearing plate is driven by the inner knob in a butting mode, the second meshing teeth can be meshed with the second driving teeth so as to conduct transmission to the second gear part.

6. The reach adjust mechanism of claim 5, wherein the piston member is an annular structure, and the first engagement teeth are provided on an inner side of an end of the piston member adjacent to the inner knob, and the second engagement teeth are provided on an outer side of an end adjacent to the second gear portion;

the inner knob is provided with a connecting column at a position corresponding to the piston piece, the connecting column is inserted into the piston piece, and the side wall surface of the connecting column is provided with the first driving teeth;

the second gear part is towards one side of interior knob is equipped with the spread groove, the spread groove is used for enclosing the cell wall that closes its notch and is equipped with the second drives the tooth the loading board by when interior knob butt drives, the piston spare can insert in the spread groove, so that second meshing tooth mesh in the second drives the tooth.

7. The telescoping adjustment mechanism of claim 4, wherein said inner knob is further provided with a third drive tooth, said carrier plate being provided with a third engagement tooth at a position opposite said third drive tooth for engagement therewith;

when the outer knob drives the inner knob to rotate along the first direction, the inner knob drives the bearing plate to slide along the direction close to the second gear part through the matching of the third driving teeth and the third meshing teeth.

8. The telescopic adjustment mechanism according to any one of claims 4 to 7, wherein the transmission structure further comprises a sliding plate, a second elastic member, and a third elastic member;

the sliding plate is slidably arranged on the mounting carrier, the second elastic piece is arranged between the mounting carrier and the sliding plate, and when the bearing plate is driven to slide by the abutting of the inner knob, the second elastic piece can drive the sliding plate to abut against the bearing plate so as to prevent the bearing plate from sliding and resetting along the direction close to the adjusting knob;

when the outer knob rotates relative to the inner knob along a second direction, the outer knob can drive the sliding plate to slide, and the direction in which the outer knob drives the sliding plate to slide is opposite to the direction in which the second elastic piece drives the sliding plate to slide

The third elastic piece is arranged between the second gear part and the piston piece so as to drive the piston piece, the second pawl and the bearing plate to slide and reset along the direction close to the adjusting knob.

9. The telescoping adjustment mechanism of claim 8, wherein said drive structure further comprises a second pawl rotatably disposed on said slide plate;

a fourth meshing tooth is arranged on the outer side of the outer knob, and one end of the second pawl can abut against the fourth meshing tooth to prevent the outer knob from rotating along the second direction;

when the outer knob rotates along the second direction, the outer knob drives the sliding plate to slide by abutting against the second pawl.

10. A wearable device, characterized by comprising a telescopic adjustment mechanism as claimed in any one of claims 1 to 9.

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