CN221225127U - Optical module and display device - Google Patents

Abstract

The utility model provides an optical module and a display device, wherein the optical module comprises an outer lens barrel and an inner mounting piece, the inner mounting piece is sleeved in the outer lens barrel and can axially move relative to the outer lens barrel, at least three protruding blocks are arranged between the outer lens barrel and the inner mounting piece, the at least three protruding blocks are uniformly distributed along the circumferential direction of the inner side wall of the outer lens barrel or the circumferential direction of the outer side wall of the inner mounting piece, and the protruding blocks are mutually abutted with the outer side wall of the inner mounting piece or the inner side wall of the outer lens barrel. The display device comprises the optical module. At least three convex blocks are arranged between the outer lens barrel and the inner mounting piece, so that the main optical axis of the optical lens of the optical module can be always positioned on the same straight line. In addition, through setting up the lug and can reduce the processing demand, reduce frictional resistance and air resistance in the focusing process.

Description

Optical module and display device

Technical Field

The utility model relates to the technical field of optical devices, in particular to an optical module and a display device.

Background

The head-mounted display device in the prior art generally does not consider people with different eyesight, and the user with myopia needs to wear the head-mounted display device after wearing glasses additionally, so that convenience is lacking.

In order to solve the above technical problem, some optical focusing structures capable of automatically focusing according to different crowds gradually appear on the market, for example, chinese patent publication No. CN211979341U discloses a near-to-eye optical focusing structure, which comprises a lens barrel, a first lens, a second lens, a rotary drum and a clamping ring, wherein a guide hole is formed in a side wall of the lens barrel, the first lens is supported in the lens barrel through a clamping pin, one end of the clamping pin penetrates from the guide hole to the outside of the lens barrel, a guide groove is formed in an inner side wall of the rotary drum, the rotary drum is sleeved on the outer side of the lens barrel and corresponds to the clamping pin and the guide groove, an end of the clamping pin is clamped in the guide groove, the second lens is arranged at the front end of the lens barrel and presses the rotary drum, the first lens is supported in the lens barrel through a first support ring, and one end of the clamping pin located in the inside is connected with the first support ring. Through rotatory rotary drum for the interval between first lens and the second lens changes, thereby realizes focusing purpose.

However, the above-mentioned publication CN211979341U also has the following drawbacks:

The lens barrel and the first support ring require higher processing precision, and it cannot be ensured that the optical axes of the first lens and the second lens cannot deviate in the focusing process. Because current lens cone and first holding ring are in the course of working, and the lens cone adopts injection moulding generally, and first holding ring adopts lathe work generally, injection moulding's lens cone roundness is lower than turning first holding ring roundness, in the lower circumstances of lens cone roundness, first holding ring cover is located in the lens cone, and the in-process of moving focusing can appear that first lens takes place to squint for first lens and second lens optical axis are not on same straight line, thereby lead to imaging to be unclear. In addition, if the interval between the lens cone and the first support ring is too small, too tight fit between the lens cone and the first support ring can cause too large friction resistance in the process of incapable mounting or rotating focusing, so that user experience is affected. If the distance between the lens cone and the first support ring is too large, the first lens and the second lens in the lens cone are too loose to be matched with each other, so that the main optical axes of the first lens and the second lens in the lens cone are not in the same straight line, the imaging quality is affected, and therefore the requirements on the processing precision of the lens cone and the first support ring are relatively high.

Disclosure of Invention

The utility model aims to provide an optical module and a display device, which effectively solve the technical problems that in the prior art, the main optical axis of an optical lens is offset in the focusing process of the optical module and the processing precision requirement of the optical module is high.

In order to solve the technical problems, the utility model provides an optical module, which comprises an outer lens barrel, an inner mounting piece and a display module, wherein the inner mounting piece is sleeved in the outer lens barrel and can axially move relative to the outer lens barrel, at least three protruding blocks are arranged between the outer lens barrel and the inner mounting piece, the at least three protruding blocks are uniformly distributed along the circumferential direction of the inner side wall of the outer lens barrel or the circumferential direction of the outer side wall of the inner mounting piece, and the protruding blocks are mutually abutted with the outer side wall of the inner mounting piece or the inner side wall of the outer lens barrel. The display module is installed on the outer lens cone.

Further, the bump is disposed on an inner sidewall of the outer barrel.

Further, the area of the lower bottom surface of the lug is larger than that of the upper bottom surface of the lug, the lower bottom surface of the lug is positioned on the inner side wall of the outer lens barrel, and the upper bottom surface of the lug is mutually abutted with the outer side wall of the inner mounting piece.

Further, the upper bottom surface and the lower bottom surface of the lug are arc curved surfaces, and the value range of the corresponding central angles of the arcs of the upper bottom surface and the lower bottom surface of the lug is 3-50 degrees.

Further, the thickness of the bump ranges from 0.05mm to 1mm.

Further, the projection is integrally formed with the outer barrel or the inner mount.

Further, the lens assembly further comprises a first lens, a second lens and a rotary drum, wherein the first lens is arranged in the outer lens barrel, the second lens is arranged on the inner mounting piece, and the rotary drum is sleeved outside the outer lens barrel; the outer wall of the inner mounting piece is provided with a bayonet lock, the outer lens barrel is provided with a guide hole, and the rotary drum is provided with a limit groove; the bayonet lock passes the guiding hole back card and locates in the spacing groove.

Further, the guide hole extends along the circumference of the side wall of the outer lens barrel obliquely from one end of the outer lens barrel to the other end of the outer lens barrel, and the limit groove extends along the axial direction of the rotary barrel.

Further, the guide hole extends along the axial direction of the outer lens barrel, and the limit groove extends along the circumferential direction of the side wall of the rotary drum obliquely from one end of the rotary drum to the other end of the rotary drum.

A display device is characterized by comprising the optical module.

Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

(1) According to the optical module provided by the utility model, at least three protruding blocks are arranged between the outer lens barrel and the inner mounting piece, and the at least three protruding blocks are uniformly distributed along the circumferential direction of the inner side wall of the outer lens barrel or the circumferential direction of the outer side wall of the inner mounting piece, so that the main optical axis of the optical module is always positioned on the same straight line in the focusing process.

(2) The optical module provided by the utility model has the advantages that the at least three protruding blocks are arranged between the outer lens barrel and the inner mounting piece, so that the processing requirement can be reduced, the friction resistance can be reduced, and no lubricant is required to be additionally added

(3) According to the optical module, at least three protruding blocks are arranged between the outer lens barrel and the inner mounting piece, so that a closed space cannot be formed in the optical module in the focusing process, air resistance cannot be generated in the focusing process of rotating the rotary barrel, and the total resistance in the focusing process is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the prior art and the embodiments of the present application, the drawings required for the description of the prior art and the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of an optical module according to an embodiment.

Fig. 2 is a schematic view of an outer lens barrel of an optical module according to an embodiment.

FIG. 3 is a schematic diagram showing a combination structure of an inner mounting member and a second lens of an optical module according to an embodiment.

Fig. 4 is a schematic diagram of a drum structure of an optical module according to an embodiment.

FIG. 5 is an exploded view of the overall structure of an optical module according to an embodiment.

Fig. 6 is a schematic diagram of an outer lens barrel structure of the optical module according to the second embodiment.

Fig. 7 is a schematic diagram of a combination structure of an inner mounting member and a second lens of the second optical module of the embodiment.

Fig. 8 is a schematic diagram of a drum structure of an optical module according to the second embodiment.

Reference numerals illustrate: the lens assembly comprises an outer lens barrel 100, a guide hole 110, a limit ring 120, an inner mounting piece 200, a bayonet 210, a bump 300, a first lens 400, a second lens 500, a rotary drum 600, a limit groove 610, a third lens 700, a bracket 800 and a display module 900.

Detailed Description

For a better understanding of the present utility model, its purpose, its structure and function, an optical module and a display device according to the present utility model will be described in further detail with reference to the accompanying drawings, so that those skilled in the art can better understand and practice the present utility model, but the present utility model is not limited thereto.

Referring to fig. 1 to 8, the present utility model provides an optical module, including an outer lens barrel 100 and an inner mounting member 200, wherein the inner mounting member 200 is sleeved in the outer lens barrel 100 and can move axially relative to the outer lens barrel 100, at least three protrusions 300 are disposed between the outer lens barrel 100 and the inner mounting member 200, the at least three protrusions 300 are uniformly distributed along the circumferential direction of the inner side wall of the outer lens barrel 100 or along the circumferential direction of the outer side wall of the inner mounting member 200, and the protrusions 300 are in contact with the outer side wall of the inner mounting member 200 or with the inner side wall of the outer lens barrel 100; the outer lens barrel is provided with a display module 900, and the display module 900 is connected with the outer lens barrel 100. The mounting manner and the connection position of the display module 900 and the outer barrel 100 are not limited herein.

Further, the optical module further includes a first lens 400, a second lens 500, and a drum 600, wherein the first lens 400 is disposed in the outer lens barrel 100, the second lens 500 is disposed on the inner mounting member 200, and the drum 600 is sleeved outside the outer lens barrel 100; the outer wall of the inner mounting piece 200 is provided with a bayonet 210, the outer lens barrel 100 is provided with a guide hole 110, and the rotary barrel 600 is provided with a limit groove 610; the bayonet 210 passes through the guide hole 110 and then is clamped in the limit groove 610. When the rotary drum 600 is rotated, the bayonet lock 210 on the inner mounting member 200 is driven by the rotary drum 600 to move in the guide hole 110 of the outer lens barrel 100, so that the inner mounting member 200 can axially move relative to the outer lens barrel 100 even if the distance between the first lens 400 and the second lens 500 is changed, thereby achieving the focusing purpose. In addition, a third lens 700 is disposed between the first lens 400 and the second lens 500, a bracket 800 and a display module 900 are further disposed at one end of the outer lens barrel 100 near the second lens 500, the display module 900 is disposed on the bracket 800, and the bracket 800 and the outer lens barrel 100 may be in a snap connection or a threaded connection. The outer lens barrel 100 is further provided with a stop ring 120 at one end close to the first lens 400, the stop ring 120 covers the outer side of the first lens 400, and the stop ring 120 is located at the end of the rotating barrel 600, so as to prevent the first lens 400 and the rotating barrel 600 from sliding out of the outer lens barrel 100.

Since at least three protrusions 300 are disposed between the outer barrel 100 and the inner mount 200, and the at least three protrusions 300 are uniformly distributed along the circumferential direction of the inner sidewall of the outer barrel 100 or along the circumferential direction of the outer sidewall of the inner mount 200, it is possible to ensure that the primary optical axes of the first lens 400 and the second lens 500 are always positioned on the same straight line during focusing. In addition, by providing at least three protrusions 300, the machining requirements may be reduced, reducing the resistance to rotation of the inner mount 200 during focusing, including reducing frictional resistance and air resistance.

Example 1

Referring to fig. 1 to 5, the present embodiment provides an optical module, which includes an outer lens barrel 100 and an inner mounting member 200, wherein the inner mounting member 200 is sleeved in the outer lens barrel 100 and can move axially relative to the outer lens barrel 100, at least three protrusions 300 are disposed between the outer lens barrel 100 and the inner mounting member 200, the at least three protrusions 300 are uniformly distributed along the circumferential direction of the inner side wall of the outer lens barrel 100, and the protrusions 300 are abutted to the outer side wall of the inner mounting member 200.

In the preferred embodiment, by providing three protrusions 300 on the inner sidewall of the outer barrel 100, the three protrusions 300 are arranged on the inner sidewall of the outer barrel 100 in an equilateral triangle shape because of stability, and the central axes of the outer barrel 100 and the inner mount 200 are always aligned in the same line during the focusing process of the rotating drum 600, that is, the main optical axes of the first lens 400 and the second lens 500 are always aligned in the same line without offset. In addition, the contact area between the outer barrel 100 and the inner mount 200 is reduced by the abutment of the projection 300 with the outer sidewall of the inner mount 200, thereby reducing frictional resistance during focusing. In addition, by arranging the three protruding blocks 300, a closed space is not formed between the first lens 400 and the second lens 500, so that air resistance is not generated in the focusing process, the total resistance in the focusing process is further reduced, and the user experience is improved. In addition, providing a smooth chamfer at the edge where the boss 300 and the inner mount 200 collide with each other can reduce frictional resistance during movement of the inner mount 200 relative to the boss 300.

In a preferred embodiment, the guide hole 110 extends obliquely from one end of the outer barrel 100 to the other end of the outer barrel 100 along the sidewall circumference of the outer barrel 100, and the limit groove 610 extends in the axial direction of the drum 600.

Specifically, the number of the guide holes 110 is at least two, and is uniformly arranged along the side wall of the outer barrel 100, and preferably, the number of the guide holes 110 is three. In addition, the number of the blocking pins 210 and the limiting grooves 610 is the same as the number of the guide holes 110. Moreover, as the drum 600 rotates, the bayonet 210 is able to move within the limit slot 610 relative to the drum 600.

Further, the guide hole 110 is extended obliquely from the first end of the outer barrel 100 to the second end of the outer barrel 100 along the sidewall circumference of the outer barrel 100. When the rotation drum 600 performs focusing, the bayonet 210 can move from the first end near the outer barrel 100 to the second end of the outer barrel 100 or from the second end near the outer barrel 100 to the first end of the outer barrel 100 within the guide hole 110, and simultaneously drive the inner mount 200 disposed in the outer barrel 100 to move together, so that the second lens 500 fixedly disposed on the inner mount 200 can move along the main optical axis relative to the outer barrel 100, to the second end direction of the outer barrel 100 or to the first end direction of the outer barrel 100. By thus changing the distance between the first lens 400 and the second lens 500, focusing is achieved.

In a preferred embodiment, the area of the lower bottom surface of the bump 300 is larger than the area of the upper bottom surface of the bump 300, the lower bottom surface of the bump 300 is located on the inner sidewall of the outer barrel 100, and the upper bottom surface of the bump 300 and the outer sidewall of the inner mount 200 are abutted against each other.

In a preferred embodiment, the upper bottom surface and the lower bottom surface of the bump 300 are arc curved surfaces, and the value range of the corresponding central angles of the arcs of the upper bottom surface and the lower bottom surface is 3-50 degrees.

Specifically, when the central angles corresponding to the circular arcs of the upper bottom surface and the lower bottom surface of the bump 300 are smaller, that is, the central angles corresponding to the circular arcs of the upper bottom surface and the lower bottom surface of the bump 300 are smaller than 3 °, bending may occur due to insufficient strength of the bump 300 in the focusing process, thereby affecting normal use of the optical module and the display device. When the central angles corresponding to the circular arcs of the upper bottom surface and the lower bottom surface of the bump 300 are larger, that is, when the central angles corresponding to the circular arcs of the upper bottom surface and the lower bottom surface of the bump 300 are larger than 50 degrees, the contact area between the bump 300 and the inner mounting piece 200 is too large, so that the friction resistance is increased, and the user experience is affected. Therefore, the circular arc corresponding central angles of the upper bottom surface and the lower bottom surface of the convex block 300 are set within 3-50 degrees, the two conditions can be effectively avoided, and the specific value can be adjusted according to the number of the convex blocks 300, the sizes of the outer lens barrel 100 and the inner mounting piece 200 and other parameters.

In a preferred embodiment, the thickness of the bump 300 ranges from 0.05mm to 1mm.

Specifically, when the thickness of the bump 300 is smaller, that is, the thickness of the bump 300 is smaller than 0.05mm, because the machining accuracy of the outer barrel 100 is relatively low, a certain machining error exists, so that other parts of the inner side wall of the outer barrel 100 except the bump 300 may also abut against the outer side wall of the inner mounting member 200, not only the friction force between the outer barrel 100 and the inner mounting member 200 may be increased, but also the bump 300 may be disabled, and the optical axis may be offset in the rotation process of the inner mounting member 200. When the thickness of the bump 300 is larger, that is, the thickness of the bump 300 is greater than 1mm, the corresponding dimensions of the outer lens barrel 100 and the inner mount 200 should be increased so as not to affect the optical performance, which may cause the overall dimensions of the optical module and the display device to be larger. The thickness of the bump 300 is set within the range of 0.05 mm-1 mm, so that the two conditions can be effectively avoided, the thickness of the bump 300 can be adjusted according to actual conditions, and the adaptability is stronger.

In a preferred embodiment, the tab 300 is integrally formed with the outer barrel 100. Through setting up lug 300 and outer mirror section of thick bamboo 100 into integrated into one piece for lug 300 is more firm, can effectively avoid the lug 300 to appear coming off the condition in focusing process to appear.

Example two

Referring to fig. 6 to 8, the present embodiment provides an optical module, which is different from the first embodiment only in that at least three protrusions 300 are uniformly distributed along the circumferential direction of the outer sidewall of the inner mounting member 200, and the protrusions 300 are abutted against the inner sidewall of the outer lens barrel 100; the bump 300 is integrally formed with the inner mount 200; the guide hole 110 extends in the axial direction of the outer barrel 100, and the limit groove 610 extends obliquely from one end of the barrel 600 to the other end of the barrel 600 along the circumferential direction of the side wall of the barrel 600.

Example III

The present embodiment provides a display device including the optical module of any of the above embodiments.

Since the display device is provided with the optical module of any of the above embodiments, the optical module of any of the above embodiments has the advantages that the display device also has.

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. The utility model provides an optical module, includes outer lens cone, interior installed part and display module assembly, its characterized in that:

The inner mounting piece is sleeved in the outer lens barrel and can axially move relative to the outer lens barrel, at least three protruding blocks are arranged between the outer lens barrel and the inner mounting piece, the protruding blocks are evenly distributed along the circumferential direction of the inner side wall of the outer lens barrel or the circumferential direction of the outer side wall of the inner mounting piece, the protruding blocks are mutually abutted with the outer side wall of the inner mounting piece or the inner side wall of the outer lens barrel, and the display module is mounted on the outer lens barrel.

2. The optical module of claim 1, wherein the bumps are disposed on an inner sidewall of the outer barrel.

3. The optical module of claim 2, wherein the area of the lower bottom surface of the bump is larger than the area of the upper bottom surface of the bump, the lower bottom surface of the bump is located on the inner side wall of the outer lens barrel, and the upper bottom surface of the bump is in contact with the outer side wall of the inner mounting member.

4. An optical module according to claim 3, wherein the upper bottom surface and the lower bottom surface of the bump are arc curved surfaces, and the value range of the corresponding central angles of the arcs of the upper bottom surface and the lower bottom surface is 3-50 °.

5. The optical module according to any one of claims 1 to 4, wherein the thickness of the bump ranges from 0.05mm to 1mm.

6. The optical module of claim 1, wherein the tab is integrally formed with the outer barrel or the inner mount.

7. The optical module of claim 5, further comprising a first lens disposed within the outer barrel, a second lens disposed on the inner mount, and a rotating drum disposed about the outer barrel;

The outer wall of the inner mounting piece is provided with a bayonet lock, the outer lens barrel is provided with a guide hole, and the rotary drum is provided with a limit groove; the clamping pin passes through the guide hole and then is clamped in the limiting groove.

8. The optical module of claim 7, wherein the guide hole extends obliquely from a first end of the outer barrel to a second end of the outer barrel along a sidewall circumference of the outer barrel, and the limit groove extends in an axial direction of the drum.

9. The optical module of claim 7, wherein the guide hole extends in an axial direction of the outer barrel, and the limit groove extends obliquely from one end of the barrel to the other end of the barrel along a sidewall circumference of the barrel.

10. A display device comprising an optical module according to any one of the preceding claims 1 to 9.