CN113009695B - Head-mounted adjusting device and head-mounted display equipment - Google Patents

Abstract

The invention discloses a head-mounted adjustment device and a head-mounted display device, wherein the head-mounted adjustment device comprises: an installation casing; two racks are arranged in parallel on the installation casing and are slidably connected with the installation casing; a gear, It is engaged between two racks, and a limit shaft is protruded from one side of the limit ring; the limit ring is sleeved outside the limit shaft, and the outer periphery of the limit shaft and the inner periphery of the limit ring form a limit ring groove; A retainer is provided with a receiving groove, a limit roller is rotatably arranged in the receiving groove, and the annular retainer is rotatably arranged in the limit ring groove; and a locking switch is used to make the annular retainer and the limit ring face each other Rotate so that the limit roller reaches the locked position or the free position; in the locked position, the limit roller abuts against the limit ring and the limit shaft at the same time; in the free position, the limit roller and the limit ring or There is a gap between the limit shafts. The technical solution of the present invention aims to avoid unnecessary noise from the head-mounted adjustment device during the adjustment process, so as to improve the user experience.

Description

Head-mounted adjustment device and head-mounted display device

technical field

The present invention relates to the field of head-mounted devices, in particular to a head-mounted adjustment device and a head-mounted display device.

Background technique

Head-mounted display devices such as virtual reality headsets, augmented reality headsets, and mixed reality headsets generally include a host for displaying image information to a user and a wearing part for wearing the host on the user's head.

The wearing part usually includes straps or side arms extending from both ends of the host to one side, the head-mounted display device is worn behind the user's head, and the straps or side arms are located on both sides of the user's head. In view of the different head circumferences of different users, in order to fit different users, the wearing part usually further includes an adjustment part for adjusting the length of the strap or the side arm to adjust the wearing tightness of the head-mounted display device.

At present, most of the adjustment parts adopt a structure in which a ratchet is matched with a gear, and the ratchet is matched with a mounting housing. However, during the adjustment process, the ratchet wheel constantly touches the teeth on the mounting housing, which brings unnecessary noise.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a head-mounted adjustment device, which aims to avoid unnecessary noises from the head-mounted adjustment device during the adjustment process, so as to improve the user experience.

In order to achieve the above purpose, the head-mounted adjustment device proposed by the present invention includes:

install the shell;

two racks are arranged in parallel on the mounting shell and are slidably connected with the mounting shell;

a gear, meshing between the two racks, and a limit shaft is protruded from one side of the gear;

a limit ring, sleeved on the outside of the limit shaft, the outer periphery of the limit shaft and the inner periphery of the limit ring limit a limit ring groove, and the limit ring groove includes at least one limit In the limit section, the inner periphery of the limit ring gradually approaches the outer periphery of the limit shaft;

An annular cage is provided with a receiving groove penetrating the inner annular surface and the outer annular surface, a limit roller is rotatably arranged in the receiving groove, and in the radial direction of the annular cage, the limit roller The width of the ring is larger than the width of the receiving groove, the annular cage is rotatably arranged in the limiting ring groove, and the limiting roller is located in the limiting section; and

a locking switch, which is used to make the annular cage and the limit ring rotate relative to each other, so that the limit roller reaches the locking position or the free position; in the locking position, The limit roller is in contact with the limit ring and the limit shaft at the same time; in the free position, there is a gap between the limit roller and the limit ring or the limit shaft .

Optionally, the limit ring is fixedly connected to the installation housing, and the locking switch is used to drive the annular holder to rotate.

Optionally, the installation casing is provided with a pushing member, the pushing member is rotatably connected to the installation casing, and the locking switch is drivingly connected with the pushing member to drive the pushing member the piece moves between the first position and the second position;

The annular retainer is provided with an extension arm, and the pushing member pushes against the extension arm to drive the annular retainer to rotate;

When the pushing member is at the first position, the limiting roller is at the free position; when the pushing member is at the second position, the limiting roller is at the lock tight.

Optionally, a torsion spring is further connected between the pushing member and the installation housing, and the torsion spring is used to stop the pushing member from being in the first position.

Optionally, a return spring is further connected between the extension arm and the installation housing, and when the pushing member moves from the first position to the second position, the extension arm compresses the return spring;

When the pushing member moves from the second position to the first position, the return spring is released to push the extension arm, so that the extension arm resists the pushing member against the second position.

Optionally, a connecting protrusion is provided on the inner side of the locking switch, a mounting groove is provided on the pushing member, and the connecting protrusion is clamped in the mounting groove, so that the locking switch can drive the Push pieces.

Optionally, the locking switch is further provided with a first positioning rib, and the mounting housing is provided with two second positioning ribs, when the pushing member is located at the first position and the second position , the first positioning ribs are respectively abutted against different second positioning ribs.

Optionally, the locking switch is provided with a fixed shaft, and the gear is rotatably sleeved on the fixed shaft.

Optionally, a limiting convex portion is provided on the periphery of one end of the fixed shaft away from the locking switch, and the limiting convex portion abuts on the side of the gear facing away from the locking switch.

Optionally, the fixed shaft is a hollow column structure, and the end of the fixed shaft away from the locking switch is provided with a plurality of through grooves.

The present invention also provides a head-mounted display device, including the aforementioned head-mounted adjustment device.

In the technical solution of the present invention, the head-mounted adjustment device has a locking state and an adjustment state. When the head-mounted adjustment device is in the adjustment state, the user can adjust the tightness of the head-mounted display device by adjusting the relative position of the rack. When the tightness of the wearable display device is adjusted in place, the user can turn the knob to switch the adjustment state to the locked state, and the limit roller will also reach the locked position from the free position, so that the gear can be quickly and reliably locked. During the adjustment process, especially during the locking process, there will be no continuous collision between the limit roller and the limit shaft, thereby avoiding the generation of noise and improving the user experience.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a head-mounted adjusting device according to the present invention;

2 is a cross-sectional view of an embodiment of the head-mounted adjusting device of the present invention;

3 is a schematic structural diagram of an embodiment of the head-mounted adjusting device of the present invention when the pushing member is in the first position;

Fig. 4 is the sectional view of Fig. 3;

5 is a schematic structural diagram of an embodiment of the head-mounted adjusting device of the present invention when the pushing member is in the second position;

Fig. 6 is the sectional view of Fig. 5;

7 is a schematic diagram of the cooperation of a limit ring and a limit shaft of an embodiment of the head-wear adjusting device of the present invention;

FIG. 8 is a schematic structural diagram of an embodiment of the locking switch of the head-mounted adjusting device of the present invention.

Description of reference numbers:

label name label name 100 Install the housing 200 gear 110 push pieces 210 Limit axis 111 mounting slot 300 Limit ring 120 Limit wheel installation groove 310 Mounting boss 130 Second positioning rib 500 ring cage 140 return spring mounting groove 510 storage tank 400 Limit ring groove 520 Limit roller 410 free bits 530 extension arm 420 Lock bit 531 Install the boss 600 lock switch 700 torsion spring 610 connection protrusion 800 return spring 620 first positioning rib 630 fixed shaft 631 Limiting protrusion 632 through slot

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

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

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, if the meaning of "and/or" appears in the whole text, it includes three parallel schemes, taking "A and/or B" as an example, including scheme A, or scheme B, or the scheme that A and B satisfy at the same time . In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The present invention provides a head-mounted adjusting device.

In an embodiment of the present invention, as shown in FIG. 1 , FIG. 2 , FIG. 4 , FIG. 6 and FIG. 7 , the head-mounted adjusting device includes:

Install the housing 100;

Two racks (not shown) are arranged on the mounting housing 100 in parallel, and are slidably connected with the mounting housing 100;

The gear 200 is meshed between the two racks, and a limit shaft 210 is protruded from one side of the gear 200;

The limit ring 300 is sleeved on the outside of the limit shaft 210 , the outer periphery of the limit shaft 210 and the inner periphery of the limit ring 300 limit a limit ring groove 400 , and the limit ring groove 400 includes at least one limit section, and in the limit section, the inner periphery of the limit ring 300 gradually approaches the outer periphery of the limit shaft 210;

The annular cage 500 is provided with a receiving groove 510 penetrating the inner annular surface and the outer annular surface. The receiving groove 510 is rotatably provided with a limit roller 520. In the radial direction of the annular cage 500, all the The width of the limiting roller 520 is greater than the width of the receiving groove 510 , the annular cage 500 is rotatably disposed in the limiting ring groove 400 , and the limiting roller 520 is located in the limiting section ;as well as

A locking switch 600, which is used to make the annular cage 500 and the limit ring 300 rotate relative to each other, so that the limit roller 520 can reach the locking position 420 or the free position 410; In the locking position 420 , the limiting roller 520 abuts against the limiting ring 300 and the limiting shaft 210 at the same time, so as to lock the gear 200 so that the two racks face each other Fixed; in the free position 410, there is a gap between the limit roller 520 and the limit ring 300 or the limit shaft 210, so that the gear 200 can rotate freely, so that the two The racks are relatively movable.

It can be understood that the head-mounted display device includes a host and a head-mounted adjusting device. One end of the two racks is respectively fixedly connected to the host, and the other ends are both slidably connected to the mounting housing 100 . Without loss of generality, the rack is slidably connected to the mounting housing 100 through the guide rail chute structure. Specifically, the housing is provided with two parallel chute The rack can slide in the chute. The head-mounted adjustment device can adjust the elasticity of the head-mounted display device by adjusting the relative positions of the two racks, so that the head-mounted display device is suitable for different users.

In the present invention, the gear 200 is meshed between the two racks, and by locking the gear 200, the two racks can be kept relatively fixed, so that the head-mounted display device can maintain a constant tightness; releasing the gear 200, the two The racks can then move relative to each other to adjust the tightness of the headset. Specifically, after the gear 200 is released, the two racks can move toward each other or back, and the two racks move toward each other to tighten the head-mounted display device; the two racks move toward each other to loosen the head-mounted display device. display screen.

In the present invention, the limit shaft 210 is protruded from one side of the gear 200 , so the gear 200 can be locked by locking the limit shaft 210 . Specifically, as shown in FIG. 7 , a limit ring 300 is sleeved outside the limit shaft 210 to form a limit ring groove 400 , and the limit section of the limit ring groove 400 has a locking position 420 and a free position 410 . The limiting roller 520 is rotatably disposed in the limiting section. Wherein, in the limiting section, the inner peripheral edge of the limiting ring 300 gradually approaches the outer peripheral edge of the limiting shaft 210, that is, in the limiting section, the inner peripheral edge of the limiting ring 300 is inclined inwardly in the circumferential direction, so as to The groove width of the locking position 420 is made smaller than the groove width of the free position 410 . Therefore, when the limiting roller 520 reaches the locking position 420 , the limiting roller 520 can abut against the two groove walls of the limiting ring groove 400 . , that is, the limit roller 520 can abut on the limit shaft 210 and the limit ring 300 at the same time, the rotation of the limit shaft 210 will be restricted by the limit roller 520, and only the limit ring 300 and the limit When the roller 520 and the mounting housing 100 remain relatively stationary, the gear 200 can be locked; and when the limit roller 520 reaches the free position 410 , there is a gap between the limit roller 520 and the limit shaft 210 or the limit wheel. If there is a gap, the rotation of the limiting shaft 210 will not be restricted by the limiting roller 520 , that is, the gear 200 can rotate freely.

In the present invention, the locking switch 600 can make the ring cage 500 and the limit ring 300 rotate relative to each other, and because the limit roller 520 can be rotatably arranged in the receiving groove 510 of the ring cage 500, the rotation locking The switch 600 can adjust the position of the limit roller 520 in the limit section. Specifically, when the user needs to adjust the tightness of the head-mounted display device, the locking switch 600 can be rotated to adjust the limit roller 520 to the free position 410, so that the gear 200 can rotate freely. At this time, the user can directly apply Force on the two racks to move the two racks toward or away from each other to adjust the tightness of the head-mounted display device; when the tightness of the head-mounted display device is adjusted in place, the user can turn the locking switch 600 again to The limit roller 520 is adjusted to the locking position 420, so that the gear 200 is locked. At this time, the two racks will remain relatively fixed, and the tightness of the head-mounted display device will also remain constant.

In the prior art, the ratchet wheel is used to cooperate with the installation housing to lock the ratchet wheel, wherein the ratchet wheel and the gear rotate coaxially, and the gear can be locked by locking the ratchet wheel. However, during the adjustment process, the ratchet wheel is in constant contact with the teeth on the mounting shell, especially when the knob is released, the ratchet wheel rotates rapidly, and the ratchet teeth will continuously collide with the teeth on the mounting shell, and the continuous The harsh noise greatly affects the user experience.

In the present invention, the head-mounted adjustment device has a locking state and an adjustment state. When the head-mounted adjustment device is in the adjustment state, the user can adjust the tightness of the head-mounted display device by adjusting the relative position of the rack. When the tightness of the wearable display device is adjusted in place, the user can turn the locking switch to switch the adjustment state to the locking state, and the limit roller 520 will also reach the locking position 420 from the free position 410, so that the user can quickly The gear 200 is securely locked. During the adjustment process, especially during the locking process, there will be no continuous collision between the limit roller 520 and the limit shaft 210, thereby avoiding the generation of noise, thereby improving the user experience. user experience.

Further, in this embodiment, as shown in FIG. 3 and FIG. 5 , the limiting ring 300 is fixedly connected to the mounting housing 100 , and the locking switch 600 is used to drive the annular holder 500 to rotate , so as to realize the relative movement between the annular cage 500 and the limiting ring 300 . Without loss of generality, in this embodiment, the outer periphery of the limit ring 300 is provided with three installation protrusions 310 at intervals, and the installation housing 100 is provided with three limit wheel mounting grooves 120 correspondingly. The matching of the wheel mounting grooves 120 enables the limiting ring 300 to be fixedly mounted on the mounting housing 100 . In this way, the locking switch 600 drives the ring cage 500 to rotate, the ring cage 500 can drive the limit roller 520 to rotate, and the limit roller 520 can move to the locking position 420 or the free position 410 to lock the gear 200 Or release gear 200. Of course, in other embodiments, the annular cage 500 can also be fixedly connected to the installation housing 100 , and the locking switch 600 can drive the limit ring 300 to rotate, so that the limit segment can also be relative to the limit roller 520 The movement makes the locking position 420 or the free position 410 approach the limiting roller 520 , so as to achieve the purpose of locking the gear 200 or releasing the gear 200 .

Further, in this embodiment, as shown in FIG. 3 and FIG. 5 , the installation housing 100 is provided with a pushing member 110 , and the pushing member 110 is rotatably connected to the installation housing 100 . The locking switch 600 is drivingly connected with the pushing member 110 to drive the pushing member 110 to move between the first position and the second position; the annular holder 500 is provided with an extension arm 530, the pushing The pushing member 110 pushes against the extension arm 530 to drive the annular cage 500 to rotate; when the pushing member 110 is at the first position, the limiting roller 520 is at the free position 410; When the pushing member 110 is located at the second position, the limiting roller 520 is located at the locking position 420 . In this embodiment, the locking switch 600 indirectly drives the annular holder 500 . Specifically, a rotatable abutting member 110 is provided on the mounting housing 100 , and one end of the abutting member 110 is used for driving the locking switch 600 One end is used to push against the extension arm 530 on the ring holder 500 , and therefore, the ring holder 500 can be driven by the pushing member 110 by turning the locking switch 600 . Under the driving of the locking switch 600, when the abutting member 110 reaches the first position, the annular cage 500 also reaches the corresponding position, so that the limit roller 520 is located at the free position 410. At this time, the user can adjust it adaptively. The tightness of the head-mounted display device; when the abutting member 110 reaches the second position, the annular cage 500 also reaches the corresponding position, so that the limiting roller 520 is located at the locking position 420, at this time, the tightness of the head-mounted display device can remain constant. Of course, in other embodiments, the locking switch 600 can also be fixedly connected directly with the ring holder 500 to directly drive the ring holder 500 to rotate.

Further, in this embodiment, as shown in FIG. 3 and FIG. 5 , a torsion spring 700 is also connected between the pushing member 110 and the installation housing 100 , and the torsion spring 700 is used to resist the The pushing member 110 is in the first position. Without loss of generality, in this embodiment, the pushing member 110 moves counterclockwise from the second position to the first position, and during the movement of the pushing member 110 , the torsion spring 700 acts as a limiter to limit the pushing member 110 . The pusher 110 continues to move counterclockwise beyond the first position, so as to prevent the ring cage 500 from excessively pressing the limit roller 520 at the locking position 420 , causing the limit roller 520 to be stuck in the limit ring groove 400 or Damage to the structure of internal components.

Further, in this embodiment, as shown in FIG. 3 and FIG. 5 , a return spring 800 is also connected between the extension arm 530 and the installation housing 100 , and the pushing member 110 starts from the first When a position moves to the second position, the extension arm 530 compresses the return spring 800; when the pusher 110 moves from the second position to the first position, the return spring 800 Release to push the extension arm 530 , so that the extension arm 530 resists the pushing member 110 at the second position. In this embodiment, the pushing portion is limited to the first position and the second position by the cooperative action of the return spring 800 and the torsion spring 700 . It can be understood that in the first position or the second position, the extension arm 530 abuts against the abutting member 110. Therefore, the force of the return spring 800 can be transmitted to the abutting member 110 through the extension arm 530, and the return spring 800 and the torsion The springs 700 will respectively generate torques of the same magnitude but opposite directions to the abutting members 110 , so that the abutting members 110 can be stably in the first position or the second position without being acted on by an external force. Optionally, the extension arm 530 is provided with a mounting post 531, the mounting housing 100 is provided with a reset spring mounting groove 140, the reset spring 800 is sleeved on the mounting post 531, and is accommodated in the reset spring mounting groove 140, so that The inelastic deformation of the return spring 800 during the movement of the extension arm 530 is avoided, which affects the function of the return spring 800 . Of course, in other embodiments, other limiting structures may also be provided on the mounting housing 100 to directly limit the locking switch 600, that is, the pushing member may be indirectly limited to the first position or the second position. Location.

Further, in this embodiment, as shown in FIG. 3 , FIG. 5 and FIG. 8 , the locking switch 600 is provided with a connecting convex portion 610 inside, and the pushing member 110 is provided with a mounting groove 111 . The protruding portion 610 is clamped in the mounting slot 111 , so that the locking switch 600 can drive the pushing member 110 . When the locking switch 600 drives the pushing member 110 to reach the first position or the second position, the head-mounted display device can be switched to the adjustment state or the locking state correspondingly. In this embodiment, the fixed connection between the locking switch 600 and the pushing member 110 is realized by the cooperation of the mounting convex portion 310 and the mounting groove 111 . Of course, in other embodiments, the pushing member 110 can also be riveted or screwed. It is fixedly connected to the locking switch 600 by means of locking or the like.

Further, in this embodiment, the locking switch 600 is further provided with a first positioning rib 620 , and the installation housing 100 is provided with two second positioning ribs 130 . The rotation of the locking switch 600 can make The first positioning ribs 620 move between the two second positioning ribs 130 . When the pushing member 110 is located at the first position and the second position, the first positioning ribs 620 are respectively Resist the different second positioning ribs 130 . In this way, when the user turns the locking switch 600 so that the first positioning ribs 620 abut against different second positioning ribs 130 , the pushing member 110 is simultaneously positioned to the first position or the second position. When the first positioning rib 620 abuts against different second positioning ribs 130, the user can receive feedback, and can instantly perceive that the head-mounted adjusting device has been switched to a different state, thereby further improving the user's use experience. Without loss of generality, in this embodiment, the first positioning rib 620 is disposed on the inner side of the locking switch 600 , so that the appearance of the head-mounted type is more concise and beautiful. Of course, in other embodiments, other positioning structures may also be provided on the mounting housing 100 to directly position the pushing member 110 .

Further, in this embodiment, as shown in FIG. 2 and FIG. 8 , the locking switch 600 is provided with a fixed shaft 630 , and the gear 200 is rotatably sleeved on the fixed shaft 630 , so that the fixed shaft 630 can be simultaneously It acts as a rotation shaft of the lock switch 600 and the gear 200, so that the lock switch 600 and the gear 200 can rotate smoothly. Of course, in other embodiments, the locking switch 600 and the gear 200 may also be connected to the installation housing 100 by means of annular groove rails, respectively, which can also make the locking switch 600 and the gear 200 rotate smoothly.

Further, in this embodiment, as shown in FIG. 2 and FIG. 8 , a limiting protrusion 631 is provided on the periphery of one end of the fixing shaft 630 away from the locking switch 600 , and the limiting protrusion 631 abuts against On the side of the gear 200 away from the locking switch 600, the gear 200 is prevented from coming out of the fixed shaft 630, thereby improving the connection stability of the internal components of the headgear adjusting device; further, the fixed shaft 630 is hollow The end of the fixed shaft 630 away from the locking switch 600 is provided with a plurality of through grooves 632 to leave a deformation allowance at the end of the fixed shaft 630 to facilitate the gear 200 to be assembled on the fixed shaft 630 from this end superior. Of course, in other embodiments, the fixed shaft 630 may not be provided with a limit protrusion or a through groove, but a limit buckle is added. In this way, the gear 200 can be easily assembled on the fixed shaft 630, and then The limit buckle is engaged with the fixed shaft 630 to restrict the gear 200 from being separated from the fixed shaft 630 .

The present invention also provides a head-mounted display device, the head-mounted display device includes a head-mounted adjustment device, and the specific structure of the head-mounted adjustment device refers to the above-mentioned embodiment, because the head-mounted display device adopts all the technologies of all the above-mentioned embodiments. Therefore, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be repeated here.

The above descriptions are only optional embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, any equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect Applications in other related technical fields are included in the scope of patent protection of the present invention.

Claims (9)

1. A head adjustment device, comprising:

installing a shell;

the two racks are arranged in parallel on the mounting shell and are in sliding connection with the mounting shell;

the gear is meshed between the two racks, and one surface of the gear is convexly provided with a limiting shaft;

the limiting ring is sleeved outside the limiting shaft and fixedly connected to the mounting shell, a limiting ring groove is limited by the outer periphery of the limiting shaft and the inner periphery of the limiting ring, the limiting ring groove comprises at least one limiting section, and the inner periphery of the limiting ring is gradually close to the outer periphery of the limiting shaft at the limiting section;

the annular retainer is provided with an accommodating groove penetrating through an inner ring surface and an outer ring surface, a limiting roller is rotatably arranged in the accommodating groove, the width of the limiting roller is greater than that of the accommodating groove in the radial direction of the annular retainer, the annular retainer is rotatably arranged in the limiting ring groove, and the limiting roller is positioned in the limiting section; and

the locking switch is used for driving the annular retainer to rotate, so that the limiting rollers reach a locking position or a free position; in the locking position, the limiting roller is simultaneously abutted against the limiting ring and the limiting shaft; and a gap is reserved between the limiting roller and the limiting ring or the limiting shaft in the free position.

2. The headgear adjustment device according to claim 1, wherein the mounting housing is provided with an urging member, the urging member is rotatably connected to the mounting housing, and the locking switch is drivingly connected to the urging member to drive the urging member between the first position and the second position;

the annular retainer is provided with an extension arm, and the pushing piece pushes the extension arm to drive the annular retainer to rotate;

when the pushing piece is located at the first position, the limiting roller is located at the free position; when the pushing piece is located at the second position, the limiting roller is located at the locking position.

3. The headgear adjustment device according to claim 2, wherein a torsion spring is further connected between the urging member and the mounting housing, and the torsion spring is configured to urge the urging member to the first position.

4. The headgear adjustment device of claim 2, wherein a return spring is further coupled between the extension arm and the mounting housing, the extension arm compressing the return spring as the push member moves from the first position to the second position;

when the pushing piece moves from the second position to the first position, the return spring is released to push the extension arm, so that the extension arm pushes the pushing piece to the second position.

5. The wear adjustment device of claim 2, wherein the locking switch is provided with a connecting protrusion inside, the pushing member is provided with a mounting groove, and the connecting protrusion is engaged with the mounting groove, so that the locking switch can drive the pushing member.

6. The headgear adjustment device according to claim 2, wherein the locking switch further has a first positioning rib, the mounting housing has two second positioning ribs, and the first positioning rib abuts against the different second positioning ribs when the pushing member is located at the first position and the second position.

7. The headgear adjustment device according to any one of claims 1 to 6, wherein the locking switch is provided with a fixed shaft, and the gear is rotatably sleeved on the fixed shaft.

8. The head-mounted adjusting device of claim 7, wherein the periphery of one end of the fixing shaft away from the locking switch is provided with a limiting convex part, and the limiting convex part abuts against one surface of the gear, which faces away from the locking switch;

and/or the fixed shaft is of a hollow column structure, and one end, far away from the locking switch, of the fixed shaft is provided with a plurality of through grooves.

9. A head-mounted display device comprising the head-mounted adjustment apparatus according to any one of claims 1 to 8.

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