Lens barrel adjustment mechanism and head-mounted device

Abstract

The present invention belongs to the technical field of head-mounted devices, and in particular, relates to a lens barrel adjustment mechanism and a head-mounted device; the lens barrel adjustment mechanism includes a support structure, two lens barrels, and also includes a cam located on the midline between the two lens barrels and rotatably mounted on the support structure, an adjusting member for driving the cam to move, and a push-pull rod structure slidably mounted on the support structure along the direction of the midline, the profile of the cam is symmetrical along its axis, and the cam is transmission-connected to the first end of the push-pull rod structure close to the cam, and connecting rods are respectively provided between the second end of the push-pull rod structure away from the cam and the two lens barrels, and the two ends of each connecting rod are respectively rotatably connected to the second end of the push-pull rod structure and the corresponding lens barrel; the head-mounted device includes a housing, and a lens barrel adjustment mechanism installed in a cavity of the housing. When the user drives the cam to move forward or reversely through the adjusting member, the distance between the two lens barrels can be adjusted, which solves the problem of inconvenient distance adjustment between the two lens barrels.

Description

Technical Field

[0001] The invention belongs to the technical field of head-mounted devices, and in particular relates to a lens barrel adjustment mechanism and a head-mounted device. Background Art

[0002] At present, with the development of science and technology and the improvement of living standards, AR head-mounted devices and VR head-mounted devices are appearing more and more in daily life.

[0003] In order to make the head-mounted device suitable for different users, the distance between the two lens barrels of the head-mounted device can be adjusted. Usually, the distance between the two lens barrels of the head-mounted device is adjusted through a worm gear mechanism and a gear rack mechanism. Turning the adjustment wheel forward can increase the distance between the two lens barrels, and turning the adjustment wheel backward can decrease the distance between the two lens barrels. Before adjustment, it is necessary to confirm the direction of turning the adjustment wheel according to the direction icon of the head-mounted device in order to make corresponding adjustments. The adjustment is inconvenient, and the adjustment is affected by the sliding friction of the lens barrel and the transmission friction, which makes the adjustment more laborious. Summary of the invention

[0004] The purpose of the present invention is to provide a lens barrel adjustment mechanism and a head-mounted device, aiming to solve the problem of inconvenient distance adjustment between two lens barrels.

[0005] The present invention discloses a lens barrel adjustment mechanism, which comprises a support structure, two lens barrels slidably mounted on the support structure, a cam located on a center line between the two lens barrels and rotatably mounted on the support structure, an adjustment member for driving the cam to move, and a push-pull rod structure slidably mounted on the support structure along the center line. The profile of the cam is symmetrical along its axis, and the cam is transmission-connected to a first end of the push-pull rod structure close to the cam, connecting rods are respectively arranged between a second end of the push-pull rod structure away from the cam and the two lens barrels, and both ends of each connecting rod are rotationally connected to the second end of the push-pull rod structure and the corresponding lens barrel.

[0006] As an improvement, the cam is a disc-shaped cam, the adjusting member is an adjusting wheel rotatably mounted on the supporting structure, and the lens barrel adjustment mechanism also includes an elastic telescopic member for making the first end of the push-pull rod structure rest against the cam, and a limiting structure for limiting the position of the cam and the adjusting member.

[0007] As an improvement, the adjusting wheel is coaxially arranged with the cam, a connecting sleeve is provided between the adjusting wheel and the cam, a mounting shaft is provided on the supporting structure, and the adjusting wheel, the connecting sleeve and the cam are sleeved on the mounting shaft.

[0008] As an improvement, an extension sleeve coaxially arranged with the connecting sleeve is provided on a side of the adjusting wheel away from the cam.

[0009] As an improvement, the connecting sleeve and the mounting shaft are tightly fitted, and the limiting structure is formed between the connecting sleeve and the mounting shaft; or, the limiting structure is a disc spring or an elastic ring arranged on the side of the adjusting wheel close to the supporting structure and coaxially arranged with the adjusting wheel.

[0010] As an improvement, a frame is provided on the supporting structure, and the frame includes a baffle plate spaced apart from the supporting structure, a connecting plate connected between the two sides of the baffle plate and the supporting structure, and a bottom plate arranged at the lower side of the two connecting plates, and a spacing is provided between the lower side of the baffle plate and the bottom plate, the mounting axis is arranged between the supporting structure and the baffle plate, and the push-pull rod structure is slidably connected to the bottom plate.

[0011] As an improvement, the push-pull rod structure includes a rod body slidably connected to the base plate, an upper hinge seat and a lower hinge seat of the rod body respectively arranged at the two ends of the rod body, and a roller rotatably installed on the upper hinge seat of the rod body; the elastic telescopic part is sleeved on the rod body between the base plate and the upper hinge seat of the rod body.

[0012] As an improvement, a mounting through hole is provided on the bottom plate, and the rod body is inserted into the mounting through hole.

[0013] As an improvement, the frame and the supporting structure are an integrated structure.

[0014] The present invention also discloses a head-mounted device, which includes a shell, and the lens barrel adjustment mechanism arranged in a cavity surrounded by the shell, and the support structure is fixed in the cavity surrounded by the shell, or the support structure is a part of the shell.

[0015] Due to the adoption of the above-mentioned technical scheme, the lens barrel adjustment mechanism of the present invention includes a supporting structure, two lens barrels slidably mounted on the supporting structure, and also includes a cam located on the center line between the two lens barrels and rotatably mounted on the supporting structure, an adjusting member for driving the cam to move, and a push-pull rod structure slidably mounted on the supporting structure along the direction of the center line. The profile of the cam is symmetrical along its axis, and the cam is transmission-connected to the first end of the push-pull rod structure close to the cam, and connecting rods are respectively provided between the second end of the push-pull rod structure away from the cam and the two lens barrels, and the two ends of each connecting rod are respectively rotatably connected to the second end of the push-pull rod structure and the corresponding lens barrel; the head-mounted device includes a shell, a lens barrel adjustment mechanism arranged in a cavity formed by the shell, and the support structure is fixed in the cavity surrounded by the shell, or the support structure is a part of the shell. During adjustment, the user drives the cam to move through the adjusting piece, and the cam is transmission-connected to the first end of the push-pull rod structure. When the cam moves, it can drive the push-pull rod structure to slide in the direction of the center line, and connecting rods are respectively provided between the second end of the push-pull rod structure and the two lens barrels, and the two ends of each connecting rod are rotationally connected to the second end of the push-pull rod structure and the corresponding lens barrel respectively. When the push-pull rod structure slides in the direction of the center line, the two lens barrels can be pulled toward each other or pushed to both sides by the two connecting rods to adjust the distance between the two lens barrels. Since the profile of the cam is symmetrical along its axis, the user can adjust the distance between the two lens barrels by driving the cam forward or reversely through the adjusting piece, thereby solving the problem of inconvenient distance adjustment between the two lens barrels. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the lens barrel adjustment mechanism of an embodiment of the present invention;

[0017] Figure 2 is a schematic cross-sectional structural diagram of a lens barrel adjustment mechanism according to an embodiment of the present invention;

[0018] Figure 3 is a three-dimensional structural schematic diagram of a transmission part of a lens barrel adjustment mechanism according to an embodiment of the present invention;

[0019] Among them, 11, supporting structure; 12, frame; 121, baffle; 122, connecting plate; 123, bottom plate; 13, mounting shaft; 20, lens barrel; 21, hinged ear; 30, cam; 40, push-pull rod structure; 41, rod body; 42, hinged seat on the rod body; 43, roller; 44, hinged seat under the rod body; 50, connecting rod; 51, mounting ring; 52, hinged seat under the connecting rod; 53, limit plate; 60, elastic telescopic member; 70, adjusting wheel; 81, connecting sleeve; 82, extension sleeve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] Figures 1 to 3 is a schematic structural diagram of a lens barrel adjustment mechanism and a head-mounted device according to an embodiment of the present invention, Figure 1 FIG. 1 is a schematic diagram showing a three-dimensional structure of a lens barrel adjustment mechanism according to an embodiment of the present invention. Figure 2 FIG. 4 is a schematic cross-sectional view of a lens barrel adjustment mechanism according to an embodiment of the present invention. Figure 3 The figure shows a three-dimensional structural schematic diagram of the transmission part of the lens barrel adjustment mechanism according to an embodiment of the present invention. For the convenience of description, only the part related to the present invention is shown in the figure.

[0022] It should be noted that, if the present invention involves directional indications (such as up, down, front, back, left, right, etc.), such directional indications are only used to explain the relative positional relationship between the components under a certain specific posture. If the specific posture changes, the directional indication will also change accordingly; if the present invention involves descriptions of "first", "second", etc., such descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0023] Depend on Figure 1 , Figure 2 and Figure 3 It can be seen that the lens barrel adjustment mechanism includes a support structure 11, two lens barrels 20 slidably mounted on the support structure 11. Usually, the lens barrel 20 is slidably mounted by a guide rod structure and a slide slider structure. The lens barrel adjustment mechanism also includes a cam 30 located on the center line between the two lens barrels 20 and rotatably mounted on the support structure 11, an adjusting member for driving the cam 30 to move, and a push-pull rod structure 40 slidably mounted on the support structure 11 along the center line. The profile of the cam 30 is symmetrical along its axis, and the cam 30 is transmission-connected to the first end of the push-pull rod structure 40 close to the cam 30. Connecting rods 50 are respectively provided between the second end of the push-pull rod structure 40 away from the cam 30 and the two lens barrels 20. The two ends of each connecting rod 50 are respectively rotatably connected to the second end of the push-pull rod structure 40 and the corresponding lens barrel 20.

[0024] During adjustment, the user drives the cam 30 to move through the adjusting member, and the cam 30 is transmission-connected to the first end of the push-pull rod structure 40. When the cam 30 moves, it can drive the push-pull rod structure 40 to slide in the direction of the center line, and connecting rods 50 are respectively provided between the second end of the push-pull rod structure 40 and the two lens barrels 20, and the two ends of each connecting rod 50 are respectively rotatably connected to the second end of the push-pull rod structure 40 and the corresponding lens barrel 20. When the push-pull rod structure 40 slides in the direction of the center line, the two lens barrels 20 can be pulled to slide toward each other or pushed to slide to both sides respectively through the two connecting rods 50, so as to adjust the distance between the two lens barrels 20. Since the profile of the cam 30 is symmetrical along its axis, the user can adjust the distance between the two lens barrels 20 when driving the cam 30 forward or reversely through the adjusting member. The lens barrel adjustment mechanism of the embodiment of the present invention solves the problem of inconvenient distance adjustment between the two lens barrels.

[0025] In an embodiment of the present invention, the cam 30 is a disc-shaped cam, and the adjusting member is an adjusting wheel 70 rotatably mounted on the supporting structure 11. The lens barrel adjustment mechanism also includes an elastic telescopic member 60 for making the first end of the push-pull rod structure 40 rest against the cam 30, and a limiting structure is provided at the position corresponding to the cam 30 or the adjusting member.

[0026] When increasing the distance between the two lens barrels 20, the user rotates the adjusting wheel 70 to drive the cam 30 to rotate, and the cam 30 pushes the push-pull rod structure 40 to slide in the direction close to the lens barrel 20, and the two connecting rods 50 can push the two lens barrels 20 to slide to both sides, so that the distance between the two lens barrels 20 is increased; when reducing the distance between the two lens barrels 20, the user rotates the adjusting wheel 70 to drive the cam 30 to rotate, because the first end of the push-pull rod structure 40 abuts against the cam 30, and no connecting structure is provided between the cam 30 and the first end of the push-pull rod structure 40, the push-pull rod structure 40 is pushed to slide in the direction away from the lens barrel 20 by the elastic force of the elastic telescopic member 60, and the two lens barrels 20 can be pulled by the two connecting rods 50 to slide toward each other, so that the distance between the two lens barrels 20 is reduced; after the two lens barrels 20 are adjusted to the desired position, since the limiting structure is provided at the position corresponding to the cam 30 or the adjusting member, the cam 30 can be prevented from being reversed under the elastic force of the elastic telescopic member 60, and the two lens barrels 20 can be limited to the adjusted position.

[0027] Specifically, the adjusting wheel 70 is coaxially arranged with the cam 30, a connecting sleeve 81 is arranged between the adjusting wheel 70 and the cam 30, and a mounting shaft 13 is correspondingly arranged on the support structure 11, the adjusting wheel 70, the connecting sleeve 81 and the cam 30 are sleeved on the mounting shaft 13, the connecting sleeve 81 and the mounting shaft 13 are tightly matched, and a limiting structure is formed between the connecting sleeve 81 and the mounting shaft 13, which can generate friction between the connecting sleeve 81 and the mounting shaft 13, and can limit the rotation of the adjusting wheel 70 and the cam 30, so as to limit the two lens barrels 20 at the adjusted position, of course, a disc spring, an elastic ring, etc. coaxially arranged with the adjusting wheel 70 can also be arranged on the side of the adjusting wheel 70 close to the support structure 11, so as to generate friction between the adjusting wheel 70 and the support structure 11. Usually, an extension sleeve 82 coaxially arranged with the connecting sleeve 81 is arranged on the side of the adjusting wheel 70 away from the cam 30, and the extension sleeve 82 is tightly matched with the mounting shaft 13, which can increase the friction.

[0028] To facilitate installation, a frame 12 is provided on the support structure 11, and the frame 12 includes a baffle 121 spaced apart from the support structure 11, a connecting plate 122 connected between the two sides of the baffle 121 and the support structure 11, and a bottom plate 123 arranged at the lower side of the two connecting plates 122, and a spacing is provided between the lower side of the baffle 121 and the bottom plate 123. Usually, the support structure 11 and the frame 12 are an integrated structure; the installation shaft 13 is arranged between the support structure 11 and the baffle 121, and the push-pull rod structure 40 is slidably connected to the bottom plate 123.

[0029] The push-pull rod structure 40 includes a rod body 41 slidably connected to the base plate 123, an upper hinge seat 42 and a lower hinge seat 44 of the rod body respectively arranged at the two ends of the rod body 41, and a roller 43 rotatably installed on the upper hinge seat 42 of the rod body. Specifically, a mounting through hole is provided on the base plate 123, and the rod body 41 is inserted into the mounting through hole; the elastic telescopic member 60 is sleeved on the rod body 41 between the base plate 123 and the upper hinge seat 42 of the rod body. Usually, the elastic telescopic member 60 is a spring.

[0030] In order to facilitate the connection between the connecting rod 50 and the second end of the push-pull rod structure 40 and the lens barrel 20, a mounting ring 51 is provided on one end of the connecting rod 50 close to the push-pull rod structure 40, a connecting rod lower hinge seat 52 is provided on one end of the connecting rod 50 close to the lens barrel 20, and a corresponding hinge ear 21 is provided on the lens barrel 20; the mounting rings 51 of the two connecting rods 50 are inserted into the lower hinge seat 44 of the rod body and are connected to each other through a rotating shaft, and the hinge ear 21 on the lens barrel 20 is inserted into the lower hinge seat 52 of the connecting rod and is connected to each other through a rotating shaft. In order to avoid collision when the two lens barrels 20 slide towards each other, a limiting plate 53 is provided at the position corresponding to the two connecting rods 50, specifically, the limiting plate 53 is fixedly connected to the mounting ring 51 as a whole, and the end of the connecting rod 50 is fixedly connected to the limiting plate 53.

[0031] In some other embodiments, an annular groove may be provided on the side of the disc cam, or the cam 30 may be set as a cylindrical cam, and a plug-in rod inserted into the annular groove or the profile groove of the cylindrical cam may be provided on the first end of the push-pull rod structure 40, and a roller 43 may be rotatably installed on the plug-in rod. In this case, there is no need to set the elastic telescopic member 60 and the limiting structure.

[0032] The present invention also relates to a head mounted device, which comprises a shell and the above-mentioned lens barrel adjustment mechanism arranged in a cavity surrounded by the shell. Usually, the support structure 11 is fixed in the cavity surrounded by the shell, or the support structure 11 is a part of the shell.

[0033] Specifically, the head-mounted device is an AR head-mounted device or a VR head-mounted device.

[0034] The above descriptions are only some embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lens barrel adjustment mechanism, comprising a support structure and two lens barrels slidably mounted on the support structure, characterized in that: It also includes a cam located on the midline between the two lens barrels and rotatably mounted on the support structure, an adjusting member for driving the cam to move, and a push-pull rod structure slidably mounted on the support structure along the midline, the profile of the cam is symmetrical along its axis, and the cam is transmission-connected to a first end of the push-pull rod structure close to the cam, connecting rods are respectively arranged between a second end of the push-pull rod structure away from the cam and the two lens barrels, and both ends of each connecting rod are rotatably connected to the second end of the push-pull rod structure and the corresponding lens barrel; the cam is a disc-shaped cam, the adjusting member is an adjusting wheel rotatably mounted on the support structure, and the lens barrel adjustment mechanism also includes an elastic telescopic member for making the first end of the push-pull rod structure abut against the cam, and a limiting structure for limiting the position of the cam and the adjusting member; A frame is provided on the support structure, the frame includes a baffle plate spaced apart from the support structure, a connecting plate connected between the two sides of the baffle plate and the support structure, and a bottom plate provided on the lower sides of the two connecting plates, and a spacing is provided between the lower side of the baffle plate and the bottom plate; a mounting shaft is provided between the support structure and the baffle plate, and the cam is rotatably mounted on the mounting shaft; The push-pull rod structure includes a rod body slidably connected to the base plate, an upper hinge seat and a lower hinge seat of the rod body respectively arranged at the two ends of the rod body, and a roller rotatably installed on the upper hinge seat of the rod body; the elastic telescopic part is sleeved on the rod body between the base plate and the upper hinge seat of the rod body.

2. The lens barrel adjustment mechanism according to claim 1, characterized in that: The adjusting wheel is coaxially arranged with the cam, a connecting sleeve is arranged between the adjusting wheel and the cam, and the adjusting wheel, the connecting sleeve and the cam are sleeved on the mounting shaft.

3. The lens barrel adjustment mechanism according to claim 2, characterized in that: An extension sleeve coaxially arranged with the connecting sleeve is provided on a side of the adjusting wheel away from the cam.

4. The lens barrel adjustment mechanism according to claim 2, characterized in that: The connecting sleeve and the mounting shaft are tightly fitted, and the limiting structure is formed between the connecting sleeve and the mounting shaft; or, the limiting structure is a disc spring or an elastic ring arranged on the side of the adjusting wheel close to the supporting structure and coaxially arranged with the adjusting wheel.

5. The lens barrel adjustment mechanism according to claim 1, characterized in that: The bottom plate is provided with a mounting through hole, and the rod body is inserted into the mounting through hole.

6. The lens barrel adjustment mechanism according to claim 1, characterized in that: The frame and the supporting structure are an integrated structure.

7. A head mounted device, comprising a housing, characterized in that: It also includes a lens barrel adjustment mechanism as described in any one of claims 1 to 5, which is arranged in the cavity surrounded by the shell, and the support structure is fixed in the cavity surrounded by the shell, or the support structure is a part of the shell.

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