WO2023103466A1 - Adjusting structure for lens, and head-mounted display device - Google Patents

Abstract

An adjusting structure (100) for a lens, and a head-mounted display device. The adjusting structure (100) for a lens comprises a lens barrel (1) and a driving mechanism (2), wherein a first mounting portion (11) and a second mounting portion (12) are sequentially provided in the lens barrel (1), the first mounting portion (11) is used for mounting a first lens (200), the second mounting portion (12) is used for mounting a second lens (300), the second mounting portion (12) is movably arranged in a length direction of the lens barrel (1), and the driving mechanism (2) comprises a driving portion (21) and a transmission mechanism, which is connected to the driving portion (21) and the second mounting portion (12) in a driving manner; and the transmission mechanism is used for converting an action of the driving portion (21) into a movement of the second mounting portion (12) to adjust the distance between the first lens (200) and the second lens (300), so as to further adaptively adjust, according to different visions of wearers, the distance between the second lens (300) and the first lens (200), thereby satisfying diopter requirements required for the eyes of various groups of people, such that the wearer does not need to additionally wear glasses when wearing the head-mounted display device, which improves the comfort level of the wearer, avoids light leakage, improves the experience of using the head-mounted display device, and has good compatibility.

Description

Lens adjustment structure and head-mounted display device

This application is required to be submitted to the China Patent Office on December 10, 2021, and the application number is

202111515332.X, the priority of the Chinese patent application titled "A lens adjustment structure and head-mounted display device", the entire content of which is incorporated in this application by reference.

technical field

The invention relates to the technical field of VR equipment, in particular to a lens adjustment structure and a head-mounted display device.

Background technique

VR (Virtual Reality, virtual reality technology), also known as spirit technology, is a new practical technology developed in the 20th century. Virtual reality technology includes computer, electronic information, and simulation technology in one, and its basic implementation method is to simulate the virtual environment by computer so as to give people a sense of environmental immersion. With the continuous development of social productivity and science and technology, the demand for VR technology in all walks of life is increasingly strong.

At present, in daily life, more and more people wear glasses. Due to the reason of the glasses, it is uncomfortable to wear the headset, and there is light leakage when wearing the headset, which greatly affects the quality of the headset. sense of experience.

Contents of the invention

The main purpose of the present invention is to provide a lens adjustment structure and a head-mounted display device, which aims to improve the prior art. There is a phenomenon of light leakage, which greatly affects the technical problem of the experience of the headset.

In order to achieve the above object, the present invention provides a lens adjustment structure, including:

A lens barrel, a first mounting part and a second mounting part are sequentially arranged in the lens barrel, the first mounting part is mounted with a first lens, the second mounting part is mounted with a second lens, and the second mounting part The portion is movably arranged in the length direction of the lens barrel; and,

The driving mechanism includes a driving part, and a transmission mechanism for transmission connection between the driving part and the second installation part, and the transmission mechanism is used to transform the action of the driving part into the activity of the second installation part.

Optionally, the driving part is rotatably mounted on the outside of the lens barrel.

Optionally, the driving part includes rotating an adjustment knob provided on the outside of the lens barrel, and the rotation axis of the adjustment knob extends along the length direction of the lens barrel;

The transmission mechanism is in transmission connection with the adjustment knob and the second installation part.

Optionally, the transmission mechanism includes a transmission cylinder, the transmission cylinder is rotatably installed in the lens barrel, and the transmission cylinder is connected to the adjustment knob through a gear mechanism;

The second installation part is arranged in a ring shape, and is threadedly connected with the transmission cylinder through a thread structure, and the second installation part is in a non-rotational fit with the lens barrel.

Optionally, the side wall of the transmission cylinder is provided with a plurality of teeth along its circumference;

The transmission mechanism also includes a transmission gear that is sleeved on the rotating shaft of the adjustment knob, and the transmission gear is engaged with the plurality of teeth.

Optionally, the lead angle of the thread structure is α, and the friction coefficient of the thread structure is μ, wherein, tanα<μ; and/or,

The lens barrel is provided with an anti-rotation shaft extending along the length direction of the lens barrel, and the second mounting part is provided with a rotation-proof shaft along the length direction of the lens barrel, which is fixedly fitted with the anti-rotation shaft and along the length of the anti-rotation shaft. Anti-rotation hole for directional movement.

Optionally, the adjusting structure of the lens also includes:

a detection device, used to detect activity-related parameters of the second installation part;

The controller is configured to calculate the degree of correction according to the activity-related parameters and a preset mapping relationship, and the preset mapping relationship is a mapping relationship between the activity-related parameters and the degree of correction.

Optionally, the driving part includes rotating an adjustment knob provided on the outside of the lens barrel, and the rotation shaft of the adjustment knob extends along the length direction of the lens barrel, and the transmission mechanism is transmission-connected to the adjustment knob and the second installation part; the detection device is used to detect stroke-related parameters of the adjustment knob, and the activity-related parameters include the stroke-related parameters; the controller is used to detect stroke-related parameters according to the stroke-related parameters and preset Mapping relationship, calculating the degree of correction, the preset mapping relationship is the mapping relationship between the activity-related parameters and the degree of correction; and/or,

The adjustment structure of the lens also includes a display device, which is electrically connected to the controller and used to display the degree of correction.

Optionally, the detection device includes one of a Hall sensor and a rheostat sensor.

In order to achieve the above object, the present invention also provides a head-mounted display device, the head-mounted display device includes a lens adjustment structure, and the lens adjustment structure includes:

A lens barrel, a first mounting part and a second mounting part are sequentially arranged in the lens barrel, the first mounting part is used for mounting the first lens, and the second mounting part is used for mounting the second lens, so The second mounting part is movable in the length direction of the lens barrel; and,

The driving mechanism includes a driving part, and a transmission mechanism for transmission connection between the driving part and the second installation part, and the transmission mechanism is used to transform the action of the driving part into the activity of the second installation part.

In the technical solution provided by the present invention, since the second mounting part is movable in the length direction of the lens barrel, when the driving part operates, the transmission mechanism converts the action of the driving part into the The movement of the second mounting part makes the second mounting part move toward the first mounting part or move away from the first mounting part to realize the adjustment of the distance between the first lens and the second lens , and then according to the difference of the wearer's eyesight, the distance between the second lens and the first lens (double lens) can be adaptively adjusted to meet the degree requirements of the human eyes of various groups of people, so that the wearer can wear the head-mounted display There is no need to wear additional glasses during the device, which improves the comfort of the wearer and avoids light leakage, improves the experience of the head-mounted device, has good compatibility, and has a wide range of applications.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the 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. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a structural schematic view of an embodiment of an adjustment structure of a lens provided by the present invention;

Fig. 2 is a schematic structural view of the adjustment structure (another angle) of the eyeglass in Fig. 1;

Fig. 3 is a schematic top view of the adjustment structure of the lens in Fig. 1;

Fig. 4 is the sectional schematic view of B-B place in Fig. 3;

Fig. 5 is a schematic cross-sectional view at A-A in Fig. 3;

Fig. 6 is a schematic structural view at C in Fig. 5;

Fig. 7 is a schematic diagram of the structure at D in Fig. 5;

Fig. 8 is a schematic diagram of the linear relationship between the distance and the angle between the first lens and the second lens when designing in Fig. 1 .

Explanation of reference numbers:

label name label name 100 Lens Adjustment Structure 211 adjustment knob 200 first lens 212 Transmission gear 300 second lens 2111 shaft 1 lens barrel twenty two Transmission cylinder 11 First Installation Department 221 Teeth 12 Second installation department 3 Anti-rotation shaft 2 Drive mechanism 4 Detection device twenty one drive unit B Thread structure

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

Detailed ways

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

It should be noted that if there are directional indications involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture. If the specific posture changes , then the directional indication changes accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

In daily life, more and more people wear glasses. Because of the glasses, they are uncomfortable when wearing the headset, and there is light leakage when wearing the headset, which greatly affects the experience of the headset. feel.

The present invention provides a head-mounted display device. The head-mounted display device includes an adjustment structure of the lens. As long as the head-mounted display device includes the adjustment structure of the lens, it is the solution of the present invention. Among them, Fig. 1 FIG. 5 is a schematic diagram of an embodiment of the adjustment structure of the lens provided by the present invention.

Referring to Fig. 1 to Fig. 3, the lens adjustment structure 100 includes a lens barrel 1 and a driving mechanism 2, and a first mounting part 11 and a second mounting part 12 are sequentially arranged in the lens barrel 1, and the first mounting part The first lens mount 200 is mounted on the part 11, the second lens mount 300 is mounted on the second mount portion 12, and the second mount portion 12 is movable in the length direction of the lens barrel 1, and the driving mechanism 2 It includes a driving part 21 and a transmission mechanism that drives and connects the driving part 21 and the second installation part 12, and the transmission mechanism is used to convert the action of the driving part 21 into the activity of the second installation part 12 .

In the technical solution provided by the present invention, since the second mounting part 12 is movable in the longitudinal direction of the lens barrel 1, when the driving part 21 is activated, the transmission mechanism will The action is transformed into the activity of the second installation part 12, so that the second installation part 12 moves toward the first installation part 11 or moves away from the first installation part 11, so that the first lens 200 and the The adjustment of the distance between the second lens 300 is described, and then the distance between the second lens 300 and the first lens 200 (double lens) can be adaptively adjusted according to the difference of the wearer's eyesight, so as to meet the needs of various people's eyes. The degree requirement makes the wearer not need to wear additional glasses when wearing the head-mounted display device, which improves the comfort of the wearer and avoids light leakage, improves the experience of the head-mounted device, has good compatibility, and has a wide range of applications.

The setting position of the driving part 21 is multiple. For example, the driving part 21 can be arranged inside the lens barrel 1, and the driving part 21 can also be sleeved on the lens barrel 1. Specifically, in this In the embodiment, the driving part 21 is rotatably mounted on the outside of the lens barrel 1 , so that it is convenient to operate the driving part 21 .

Further, the driving part 21 includes an adjusting knob 211 that rotates on the outside of the lens barrel 1, and the rotating shaft 2111 of the adjusting knob 211 extends along the length direction of the lens barrel 1, and the transmission mechanism drives The adjustment knob 211 is connected with the second mounting part 12, when the distance between the first lens 200 and the second lens 300 needs to be adjusted, the adjustment knob 211 is turned, and the transmission mechanism will The rotation of the adjustment knob 211 is transformed into the movement of the second installation part 12 close to or away from the first installation part 11, which is easy to operate, and since the adjustment knob 211 is located on one side of the lens barrel 1, it can The contact area is reduced to a certain extent, and the adjustment knob 211 is prevented from being rotated due to misoperation.

There are many types of the transmission mechanism that drives the adjustment knob 211 and the second mounting part 12, for example, the transmission mechanism may be a belt transmission mechanism, or a chain transmission mechanism. Specifically, in this In the embodiment, the transmission mechanism includes a transmission cylinder 22, and the transmission cylinder 22 is rotatably installed in the lens barrel 1, and the transmission cylinder 22 is connected to the adjustment knob 211 through a gear mechanism to realize when the When the adjustment knob 211 rotates, it drives the transmission cylinder 22 to rotate. Since the second installation part 12 is arranged in a ring shape and is threadedly connected with the transmission cylinder 22 through a threaded structure B, and the second installation part 12 and the lens barrel 1 are locked in rotation, so that when the transmission barrel 22 rotates, the second mounting part 12 can move linearly along the length direction of the lens barrel 1, thereby realizing the first The adjustment of the distance between the lens 200 and the second lens 300, because the thread structure B has a self-locking effect, makes it possible to drive the second mounting part 12 to move only when the adjustment knob 211 is turned. This realizes that the second driving part 21 can be stopped at any position as required, which improves the stability and accuracy of the movement of the second lens 300 .

In order to realize the self-locking effect between the second mounting part 12 and the transmission cylinder 22 threaded through the thread structure B, the lead angle of the thread structure B is α, and the friction coefficient of the thread structure B is μ, where tanα<μ, set in this way, the thread lead angle in the thread structure B is smaller than the equivalent friction angle of the screw pair, so that the second mounting part 12 and the transmission cylinder 22 of the threaded connection can be self-locked, so that The second installation part 12 can stably stay at the adjusted position.

There are many ways of transmission connection between the transmission cylinder 22 and the adjustment knob 211 through a gear mechanism. For example, in one embodiment, the outer wall of the transmission cylinder 22 is provided with a first gear, and the adjustment knob 211 There is a second gear on the transmission sleeve of the rotating shaft 2111, and the first gear is meshed with the second gear. For example, in another embodiment, the side wall of the transmission cylinder 22 is provided with a plurality of The first tooth part, the side part of the adjustment knob 211 is provided with a plurality of second tooth parts meshing with the first tooth part along its circumference, specifically, in this embodiment, refer to Fig. 3 and Fig. 4. The side wall of the transmission cylinder 22 is provided with a plurality of teeth 221 along its circumference; the transmission mechanism also includes a transmission gear 212 that is sleeved on the rotating shaft 2111 of the adjustment knob 211, and the transmission gear 212 and The plurality of tooth portions 221 are meshed, so that the transmission cylinder 22 and the adjustment knob 211 transmit smoothly and work reliably.

There are many ways to realize the anti-rotation fit between the second installation part 12 and the lens barrel 1, for example, among the second installation part 12 and the lens barrel 1, one of them is provided with an anti-rotation protrusion, and the other is provided with a detent groove suitable for the detent protrusion. Specifically, in this embodiment, the lens barrel 1 is provided with a The anti-rotation shaft 3, the second mounting part 12 is provided with an anti-rotation hole that is anti-rotationally matched with the anti-rotation shaft 3 along the length direction of the lens barrel 1 and moves along the length direction of the anti-rotation shaft 3, so that in the When the transmission cylinder 22 rotates, the second mounting part 12 can only move linearly along the length direction of the lens barrel 1 , which is convenient for adjusting the distance between the first lens 200 and the second lens 300 .

It should be noted that, in order to make the second mounting part 12 move smoothly along the length direction of the lens barrel 1, the anti-rotation hole and the anti-rotation shaft 3 jointly form a anti-rotation structure, and the anti-rotation structure is provided with at least two One, the at least two anti-rotation structures are arranged at intervals along the circumference of the lens barrel 1, so that the second mounting part 121 is guided by at least two anti-rotation shafts 3 during the movement, so that This enables the second mounting portion 121 to move smoothly in a straight line.

Specifically, the lens adjustment structure 100 also includes a detection device 4 and a controller, the detection device 4 is used to detect the activity-related parameters of the second mounting part 12, and the controller is used to and the preset mapping relationship to calculate the correction degree, the preset mapping relationship is the mapping relationship between the activity-related parameters and the correction degree, so that the activity-related parameters are directly tested by the detection device 4 to obtain , so that errors in the assembly process due to design tolerances of structural parts can be eliminated, ensuring that the degree of adjustment is consistent with the degree of correction.

Referring to FIG. 1 and FIG. 4 , the driving part 21 includes an adjusting knob 211 that rotates on the outside of the lens barrel 1 , and the rotating shaft 2111 of the adjusting knob 211 extends along the length direction of the lens barrel 1 , so The transmission mechanism connects the adjustment knob 211 with the second installation part 12. When the adjustment knob 211 is rotated, the detection device 4 detects the stroke-related parameters of the adjustment knob 211, and the activity-related parameters include For the stroke-related parameters, the controller calculates the correction degree according to the stroke-related parameters and a preset mapping relationship, and the preset mapping relationship is a mapping relationship between the activity-related parameters and the correction degree, The correction degree obtained by the user is the actual adjustment degree, thus solving the problem that the correction degree is inconsistent with the actual adjustment degree due to the error in the assembly process caused by the design tolerance of the structural parts.

Specifically, in order to enable the user to obtain the degree of correction in real time, the adjustment structure of the lens also includes a display device, the display device is electrically connected to the controller, and the degree of correction is displayed through the display device, so that the user can The correction degree directly seen by the above display device is the actual adjustment degree, which improves user experience.

It should be noted that the detection device 4 includes one of a Hall sensor and a rheostat sensor. Of course, in other embodiments, the detection device 4 can also be set as an angle sensor, an angular displacement sensor, etc. The embodiment does not limit this.

Specifically, in order to determine the mapping relationship, it is necessary to obtain multiple sets of design distance parameters between the first lens 200 and the corresponding second lens 300, and obtain multiple sets of design distance parameters corresponding to multiple sets of Design degree, multiple groups of design distance parameters and corresponding multiple design degrees are fitted to obtain the functional relationship between the design distance parameter and the design degree: y ₁ =-0.0072x ₁ +8.7255, wherein, y ₁ is The design distance parameter, x ₁ is the design degree, thus it can be seen that there is a linear relationship between the design distance parameter and the design degree (with reference to Fig. 5). Due to the tolerance of the product in the production and assembly process, the product is tested at the test station. When the distance between the first lens 200 and the second lens 300 is adjusted to the maximum, the corresponding stroke-related parameter is m ₁ , and the test The station records the actual power as X ₁ , when the distance between the first lens 200 and the second lens 300 is adjusted to the minimum, the corresponding stroke-related parameter is m ₂ , and the actual power recorded by the testing station is X ₂ . Since the design distance parameter and the design degree are in a linear relationship, the preset mapping relationship between the stroke-related parameters and the actual degree can be established: X=am+b. According to X ₁ and the corresponding m ₁ , X ₂ and the corresponding m ₂ , the values of a and b in this function can be obtained. Since each product is tested individually, the component tolerance and assembly tolerance of the product are eliminated. Write the preset mapping relationship: X=am+b into the product, and the degree of correction can be obtained. Therefore, when the user adjusts the knob 211, the detection device 4 is driven to act, and the detection device 4 feeds back stroke-related parameters to the product system. Through the preset mapping relationship, the correction degree can be obtained in real time. The correction degree is the actual adjustment degree of the product, and the user can The adjusted degree is clearly known on the display device 5 .

It should be noted that there are many reasons for wearing glasses. For example, myopia needs to wear myopia glasses, and hyperopia requires hyperopia glasses. Therefore, the correction degree can be the correction degree of myopia or the correction degree of hyperopia. This is not limited. The adjustment of the degree is realized by adjusting the distance between the first lens 200 and the second lens 300. In this embodiment, the first lens 200 can be a plane mirror, a concave mirror or a convex mirror, etc., and the second lens 300 can be a concave mirror or a convex mirror. In this way, when the adjustment of the distance between the first lens 200 and the second lens 300 is changed, the degrees required by the eyes of different eyesight can be realized.

The present invention also proposes a head-mounted display device. The head-mounted display device includes a lens adjustment structure 100. The lens adjustment structure 100 adopts all the technical solutions of the above-mentioned embodiments, so it also has the advantages of the above-mentioned embodiments. The technical effects brought by the technical solution will not be repeated here.

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

Claims (10)

A lens adjustment structure, characterized in that it comprises: A lens barrel, a first mounting part and a second mounting part are sequentially arranged in the lens barrel, the first mounting part is mounted with a first lens, the second mounting part is mounted with a second lens, and the second mounting part The portion is movably arranged in the length direction of the lens barrel; and, The driving mechanism includes a driving part, and a transmission mechanism for transmission connection between the driving part and the second installation part, and the transmission mechanism is used to transform the action of the driving part into the activity of the second installation part. The lens adjustment structure according to claim 1, characterized in that, the driving part is rotatably mounted on the outside of the lens barrel. The lens adjustment structure according to claim 2, characterized in that, the driving part includes an adjustment knob that rotates on the outside of the lens barrel, and the rotation axis of the adjustment knob is along the length direction of the lens barrel extend; The transmission mechanism is in transmission connection with the adjustment knob and the second installation part. The lens adjustment structure according to claim 3, wherein the transmission mechanism includes a transmission cylinder, the transmission cylinder is rotatably installed in the lens barrel, and the transmission cylinder and the adjustment knob are connected by gears. Mechanism transmission connection; The second installation part is arranged in a ring shape, and is threadedly connected with the transmission cylinder through a thread structure, and the second installation part is in a non-rotational fit with the lens barrel. The lens adjustment structure according to claim 4, characterized in that, the side wall of the transmission cylinder is provided with a plurality of teeth along its circumference; The transmission mechanism also includes a transmission gear that is sleeved on the rotating shaft of the adjustment knob, and the transmission gear is engaged with the plurality of teeth. The lens adjustment structure according to claim 4, characterized in that, the lead angle of the thread structure is α, and the friction coefficient of the thread structure is μ, wherein, tanα<μ; and/or, The lens barrel is provided with an anti-rotation shaft extending along the length direction of the lens barrel, and the second mounting part is provided along the length direction of the lens barrel to be fixedly fitted with the anti-rotation shaft and can move along the anti-rotation shaft. Anti-rotation holes for movement in the length direction. The lens adjustment structure according to claim 1, further comprising: a detection device, used to detect activity-related parameters of the second installation part; The controller is configured to calculate the degree of correction according to the activity-related parameters and a preset mapping relationship, and the preset mapping relationship is a mapping relationship between the activity-related parameters and the degree of correction. The lens adjustment structure according to claim 7, characterized in that, the driving part comprises an adjustment knob that rotates on the outside of the lens barrel, and the rotation axis of the adjustment knob is along the length direction of the lens barrel Extending, the transmission mechanism drives the adjustment knob and the second installation part; the detection device is used to detect stroke-related parameters of the adjustment knob, and the activity-related parameters include the stroke-related parameters; The controller is used to calculate the correction degree according to the stroke-related parameters and the preset mapping relationship, and the preset mapping relationship is the mapping relationship between the activity-related parameters and the correction degree; and/or, The adjustment structure of the lens also includes a display device, which is electrically connected to the controller and used to display the degree of correction. The lens adjustment structure according to claim 8, wherein the detection device comprises one of a Hall sensor and a rheostat sensor. A head-mounted display device, characterized by comprising the lens adjustment structure according to any one of claims 1-9.

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