CN114859635B - Optical projection equipment - Google Patents
Optical projection equipment Download PDFInfo
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- CN114859635B CN114859635B CN202210531081.2A CN202210531081A CN114859635B CN 114859635 B CN114859635 B CN 114859635B CN 202210531081 A CN202210531081 A CN 202210531081A CN 114859635 B CN114859635 B CN 114859635B
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- Prior art keywords
- lens
- cover plate
- elastic
- projection device
- optical projection
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- 230000003287 optical effect Effects 0.000 title claims abstract description 88
- 229910052751 metal Inorganic materials 0.000 claims description 52
- 239000002184 metal Substances 0.000 claims description 52
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 14
- 230000004308 accommodation Effects 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 24
- 239000000741 silica gel Substances 0.000 description 24
- 229910002027 silica gel Inorganic materials 0.000 description 24
- 239000003292 glue Substances 0.000 description 21
- 230000005489 elastic deformation Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000994 depressogenic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000234314 Zingiber Species 0.000 description 1
- 235000006886 Zingiber officinale Nutrition 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 235000008397 ginger Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The application discloses an optical projection device. The optical projection device includes: the optical engine comprises an optical engine shell and a cover plate, wherein an accommodating cavity is formed in the optical engine shell, and the cover plate is used for covering the accommodating cavity; the lens group comprises a plurality of lenses, and the lenses are positioned in the accommodating cavity; the connecting piece, be provided with the connecting piece between the lens group with the apron covers under the condition of holding chamber, the connecting piece is kept away from the surface of apron with the up end butt of each lens in the lens group, perhaps with the up end bonding of each lens in the lens group.
Description
Technical Field
The present application relates to the technical field of optical devices, and more particularly, to an optical projection device.
Background
The display mode of the Digital Light Processing (DLP) projection optical machine has the characteristics of high brightness, high contrast and high resolution, and can realize miniaturized portable miniature projection by combining with an LED light source, thereby being popular with more and more users.
In the prior art, glue is dispensed between the lens and the side wall of the optical engine housing so that the lens is fixed in the optical engine housing. In order to realize the fixation of the lens, at least two dispensing positions are formed between the lens and the side wall of the optical machine shell, and dispensing is carried out at the corresponding dispensing positions one by one through dispensing equipment.
Therefore, the current glue dispensing mode between the lens and the side wall of the optical machine shell can cause a plurality of glue dispensing quantity, the glue dispensing process is complicated, and the risks of incomplete glue curing and easy volatilization can exist.
Disclosure of Invention
An object of the present application is to provide a new solution for an optical projection device.
According to a first aspect of an embodiment of the present application, there is provided an optical projection apparatus. The optical projection device includes: the optical engine comprises an optical engine shell and a cover plate, wherein an accommodating cavity is formed in the optical engine shell, and the cover plate is used for covering the accommodating cavity;
the lens group comprises a plurality of lenses, and the lenses are positioned in the accommodating cavity;
The connecting piece, be provided with the connecting piece between the lens group with the apron covers under the condition of holding chamber, the connecting piece is kept away from the surface of apron with the up end butt of each lens in the lens group, perhaps with the up end bonding of each lens in the lens group.
Optionally, the upper end surface of the lens comprises a middle area and edge areas positioned at two sides of the middle area, and the connecting piece is abutted or bonded with the middle area, or the connecting piece is abutted or bonded with the middle area and the edge areas.
Optionally, the connecting piece is an elastic pressing part.
Optionally, the connecting piece is a metal elastic piece, and when the cover plate covers the accommodating cavity, the metal elastic piece is close to the surface of the cover plate and contacts with the inner surface of the cover plate.
Optionally, the metal spring plate comprises a spring plate body and a first elastic arm connected with the spring plate body; the lens group comprises a first lens which is arranged opposite to the side wall of the optical machine shell;
under the condition that the cover plate covers the accommodating cavity, the elastic sheet body is abutted with the upper surface of each lens in the lens group, and the first elastic arm is inserted between the first lens and the side wall of the optical machine shell.
Optionally, the metal elastic sheet comprises a second elastic arm, and the side end part of the elastic sheet body extends out of the second elastic arm;
the lens group comprises a round lens, and the second elastic arm is abutted with the upper end face of the round lens under the condition that the cover plate covers the accommodating cavity.
Optionally, the metal spring plate is provided with a hollowed-out part.
Optionally, the connecting piece is the elastic column, the first end of elastic column with the apron is connected, the second end of elastic column be used for with the up end butt of lens.
Optionally, the length of the elastic column is a first length, the distance between the inner surface of the cover plate and the upper end surface of the lens is a second length, and the first length is greater than or equal to the second length.
Optionally, a through hole is formed in the cover plate, and a first end of the elastic column extends into the through hole so that the elastic column is connected with the cover plate; or a concave part is formed on the inner surface of the cover plate, and the first end of the elastic column is embedded in the concave part so as to connect the elastic column with the cover plate.
Optionally, the connecting piece is an adhesive piece, one end of the adhesive piece is adhered to the cover plate, and the other end of the adhesive piece is adhered to the upper end face of the lens.
The optical projection device has the technical effects that the optical projection device is provided, the connecting piece is arranged between the lens group and the cover plate, and the surface of the connecting piece, which is far away from the cover plate, is abutted against the upper end face of each lens in the lens group or is adhered to the upper end face of each lens in the lens group under the condition that the cover plate covers the accommodating cavity; when the surface of the connecting piece far away from the cover plate is abutted against the upper end face of each lens in the lens group, the lens is prevented from being fixed by glue, and the risks of incomplete solidification and easy volatilization of the glue are solved; when the surface of the connecting piece far away from the cover plate is adhered to the upper end face of each lens in the lens group, the glue dispensing position is prevented from being formed between the lens and the side wall of the optical machine shell.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the application, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic diagram of an optical projection apparatus according to the present application (a cover plate structure is not shown).
Fig. 2 is a schematic structural diagram of a metal spring plate according to the present application.
Fig. 3 is a schematic diagram showing a second structure of the optical projection device of the present application.
Reference numerals illustrate:
1. An optical housing; 11. a receiving chamber; 2. a lens group; 21. a first lens; 3. a metal spring plate; 31. a spring plate body; 311. a first spring body; 312. the second elastic sheet body; 32. a first elastic arm; 33. a second elastic arm; 34. a hollowed-out part; 4. an elastic column; 5. and a cover plate.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The application provides an optical projection device. For example, the optical projection device may be a DLP projector engine.
Referring to fig. 1 to 3, the optical projection apparatus includes: the optical machine comprises an optical machine shell 1, a cover plate 5, a lens group 2 and connecting pieces. The inside of the optical machine shell 1 is provided with a containing cavity 11, and the cover plate 5 is used for covering the containing cavity 11. The lens group 2 comprises a plurality of lenses, which are positioned in the accommodation cavity 11. A connecting piece is arranged between the lens group 2 and the cover plate 5, and the surface of the connecting piece far away from the cover plate 5 is abutted against the upper end face of each lens in the lens group 2 or is adhered to the upper end face of each lens in the lens group 2 under the condition that the cover plate 5 covers the accommodating cavity 11.
In this embodiment, the housing cavity 11 is disposed in the optical engine housing 1, for example, two housing cavities 11 are disposed in the optical engine housing 1, wherein one of the housing cavities 11 is a lens cavity, the other housing cavity 11 is a light source cavity, and the cover plate 5 is disposed to cover and cover the housing cavities 11, for example, the cover plate 5 covers the light source cavity and the lens cavity. For example, the light source cavity and the lens cavity may share one cover plate 5, or the light source cavity and the lens cavity may be covered with different cover plates 5, respectively.
In this embodiment, the optical projection device includes the lens group 2, and the lenses in the lens group 2 are located in the accommodating cavity 11, where the lenses in the lens group 2 are located in the accommodating cavity 11, and only the pre-fixing operation is performed on the lenses, and the final fixing purpose is achieved on the lenses through the connecting piece.
For example, the lens may be placed in the accommodating cavity 11 only, or the lens is clamped in the accommodating cavity 11, but the lens and the side wall of the accommodating cavity 11 are not fixed by dispensing. When the lens is clamped in the accommodating cavity 11, a clamping groove can be formed on the side wall of the accommodating cavity 11, and the lens is only clamped in the clamping groove; or the lens is abutted with the side wall of the accommodating cavity 11, so that the lens is only clamped in the accommodating cavity 11.
In order to avoid forming a plurality of dispensing positions on the side walls of the lens and the accommodating cavity 11 and avoid increasing the dispensing quantity and complicating the dispensing process, a connecting piece is arranged between the cover plate 5 and the lens group, and the connecting piece acts on the upper end surface of the lens to finally fix the lens in the accommodating cavity 11. The connector may be connected to the cover plate 5 or the connector may not be in a connecting relationship (only in contact) with the cover plate 5.
In a specific embodiment, in the case where the cover plate 5 covers the accommodating cavity 11, the surface of the connecting member away from the cover plate 5 abuts against the upper end face of each lens in the lens group 2. Specifically, the cover plate 5 is covered on the optical engine shell 1, the pressing force of the cover plate 5 connected with the optical engine shell 1 acts on the connecting piece, the connecting piece can generate an abutting force with the upper end face of the lens, and the lens is fixed in the accommodating cavity 11 through the abutting force.
In a further specific embodiment, in the case of a cover plate 5 covering the accommodation chamber 11, the surface of the connecting element facing away from the cover plate 5 is bonded to the upper end face of each lens of the lens group 2. Specifically, the cover plate 5 is covered on the optical machine shell 1, and the connecting piece plays a role in connecting the cover plate 5 and the upper end face of the lens. For example, the connecting piece can be bonded on the cover plate 5 in advance, the cover plate 5 is covered on the optical machine shell 1, the other end of the connecting piece can be bonded with the upper end face of the lens, multiple dispensing is avoided between the lens and the inner side wall of the accommodating cavity 11, and further the problem that the dispensing process is complicated is avoided.
Therefore, the embodiment of the application provides an optical projection device, wherein a connecting piece is arranged between a lens group 2 and a cover plate 5, when the surface of the connecting piece far away from the cover plate 5 is abutted against the upper end surface of each lens in the lens group 2, the lens is prevented from being fixed by using glue, and the risks of incomplete curing and easy volatilization of the glue are solved; when the surface of the connecting piece far away from the cover plate 5 is adhered to the upper end face of each lens in the lens group 2, the formation of a dispensing position between the lens and the side wall of the optical machine shell 1 is avoided, and the dispensing position is formed between the cover plate 5 and the upper end face of the lens, so that the dispensing quantity is reduced.
In one embodiment, referring to fig. 1 and 3, the upper end surface of the lens includes a middle area and edge areas located at two sides of the middle area, and the connecting piece is abutted or adhered to the middle area, or the connecting piece is abutted or adhered to the middle area and the edge areas.
In this embodiment, a connecting element is provided between the cover plate 5 and the lens group 2, which connecting element acts on the upper end face of the lens, wherein the upper end face of the lens comprises a central region and edge regions on both sides of the central region.
In one embodiment, the connection element is in abutment or adhesion with said intermediate zone, for example the abutment force of the connection element on the lens or the zone where the connection element is in adhesion with the lens is mainly concentrated in the intermediate zone of the lens, thus enabling the purpose of fixing the lens in the housing chamber 11.
In yet another embodiment, the connector may be brought into abutment or adhesion with the intermediate and edge regions in order to improve the reliability of the lens fixation.
In a specific embodiment, the lenses include round lenses (e.g., spherical lenses are round lenses) and square lenses (e.g., aspherical lenses are square ginger lenses); the circular lens is made of glass, and the connecting piece can form a matching relationship with the middle area and the edge area of the upper end surface of the circular lens under the condition of considering the surface type sensitivity (smaller surface type sensitivity) and the material of the circular lens. The square lens is generally molded in a plastic manner, and the square lens is made of plastic, so that the connecting piece can only form a matching relationship with the middle area of the upper end surface of the square lens under the condition of considering the surface type sensitivity (the surface type sensitivity is high) and the material of the square lens.
In one embodiment, referring to fig. 1-3, the connector is a resilient press portion.
In this embodiment, the limiting connection piece is an elastic pressing portion, that is, an elastic pressing portion is disposed between the cover plate 5 and the lens group 2, and the cover plate 5 covers the accommodating cavity 11, the elastic pressing portion generates elastic deformation under the acting force of the cover plate 5, and the elastic pressing portion forms a matching relationship with the upper end face of the lens by means of the elastic deformation of the elastic pressing portion, for example, the elastic pressing portion abuts against the upper end face of the lens, so that the lens is fixed in the accommodating cavity 11.
In one embodiment, referring to fig. 1 and 2, the connecting member is a metal spring plate 3, and in the case that the cover plate 5 covers the accommodating cavity 11, the metal spring plate 3 is close to the surface of the cover plate 5 and contacts with the inner surface of the cover plate 5.
In this embodiment, the elastic pressing portion is a metal elastic sheet 3, that is, a metal elastic sheet 3 is disposed between the cover plate 5 and the lens group 2, and the lens is fixed in the optical housing 1 by using the elasticity of the metal elastic sheet 3, so that the scheme of fixing glue in the prior art is avoided, the glue residue treatment cost is reduced, and the problem of volatilization caused by incomplete curing of the glue is solved. In addition, the lens is fixed in the optical housing 1 by using the elasticity of the metal spring plate 3, so that the scheme of glue fixing in the prior art is avoided, the man-hour of glue dispensing and curing is omitted, and the assembly efficiency is improved by more than 3 times.
In this embodiment, the elastic pressing portion is a metal spring 3, that is, the metal spring 3 is disposed between the cover plate 5 and the lens set 2, the cover plate 5 is covered on the optical housing 1 (that is, the cover is disposed above the accommodating cavity 11, and the accommodating cavity 11 is sealed), the cover plate 5 has a force acting on the metal spring 3 (that is, the cover plate 5 is fixed with the optical housing 1 by a bolt locking manner, the cover plate 5 has a pressing force acting on the metal spring 3), the cover plate 5 contacts with the metal spring 3, and at this time, the temperature inside the optical machine is led out of the optical projection device through the heat conduction characteristic of the metal spring 3, so that the temperature of the optical projection device can be reduced, and the heat dissipation problem existing in the optical projection device itself is solved.
In an alternative embodiment, the metal spring plate 3 may be placed on the lens set 2 first, and the metal spring plate 3 may slightly protrude from the accommodating cavity 11, so that the cover plate 5 is covered on the accommodating cavity 11, and the cover plate 5 presses the metal spring plate 3, so that the metal spring plate 3 abuts against the upper end surface of the lens, and plays a role in fixing the lens.
In one embodiment, when the optical projection device is a high lumen (high brightness), high power, high temperature opto-mechanical device, a metal spring plate 3 may be disposed between the cover plate 5 and the lens group 2, which on the one hand may serve to fix the lens and on the other hand may serve to conduct heat.
In one embodiment, referring to fig. 2, the metal spring 3 includes a spring body 31 and a first elastic arm 32 connected to the spring body 31; the lens group 2 comprises a first lens 21 arranged adjacent to the side wall of the optical housing 1;
In the case that the cover plate 5 covers the accommodating cavity 11, the elastic piece body 31 abuts against the upper surface of each lens in the lens set 2, and the first elastic arm 32 is inserted between the first lens 21 and the side wall of the optical machine housing 1.
In this embodiment, referring to fig. 1, the lens group 2 in the accommodation chamber 11 includes lenses arranged in the length direction of the optical projection apparatus, and lenses arranged in the width direction of the optical projection apparatus. In order to meet the requirement that the metal spring plate 3 is disposed between each lens and the cover plate 5, the spring plate body 31 of the present embodiment includes a first spring plate body 311 extending along the length direction of the optical projection device, and a second spring plate body 312 extending along the width direction of the optical projection device, where the first spring plate body 311 and the second spring plate body 312 are integrally formed. For example, the first elastic piece body 311 has a length direction and a width direction, wherein the length extending direction of the first elastic piece body 311 is the width extending direction of the second elastic piece body 312, and the width extending direction of the first elastic piece body 311 is the length extending direction of the second elastic piece body 312.
In this embodiment, the lens group 2 includes the first lens 21 disposed adjacent to the side wall of the optical housing 1, for example, one side surface of the first lens 21 (for example, the surface may be an optical surface of the first lens 21) is disposed opposite to the side wall disposed in the length direction or opposite to the side wall disposed in the width direction. Referring to fig. 1, five lenses are shown, wherein each of the five lenses is a first lens 21 as defined in this embodiment.
In this embodiment, in order to improve the fixing reliability of the lens set 2 and the fixing integrity of the lens set 2, a first elastic arm 32 is disposed at an end of the elastic body 31 (for example, an end of the elastic body 31 disposed along the length direction thereof). For example, the elastic piece body 31 and the first elastic arm 32 are integrally formed.
Under the condition that the cover plate 5 covers the optical enclosure 1, the first elastic arm 32 is inserted between the first lens 21 and the side wall (the side wall opposite to the first lens 21) of the optical enclosure 1 under the acting force of the cover plate 5, so that the fixing integrity of the lens group 2 is improved.
In an alternative embodiment, to facilitate the insertion of the first elastic arm 32 between the first lens 21 and the side wall, the first elastic arm 32 is inclined with respect to the elastic body 31; specifically, the first elastic arm 32 is inclined downward with respect to the elastic body 31, so that the first elastic arm 32 is interposed between the first lens 21 and the side wall.
It should be noted that the structure of the metal spring plate 3 in this embodiment is not limited to this structure, and the user may perform different designs on the structure of the metal spring plate 3 according to the arrangement mode of the lens group 2 in the accommodating cavity 11 and the arrangement modes of different types of lenses.
It should be noted that, the structure of the first elastic arm 32 in the metal elastic sheet 3 in this embodiment is not limited to the arrangement shown in fig. 2, and a user may perform different designs on the arrangement of the first elastic arm 32 in the metal elastic sheet 3 according to the arrangement of the lenses in the accommodating cavity 11.
In one embodiment, referring to fig. 2, the metal spring plate 3 includes a second elastic arm 33, and the second elastic arm 33 extends from a side end of the spring plate body 31.
The lens group 2 includes a circular lens, and the second elastic arm 33 abuts against an edge area of an upper end surface of the circular lens when the cover plate 5 covers the accommodating cavity 11.
In this embodiment, the metal spring 3 includes a second elastic arm 33, where the second elastic arm 33 is located on a side end of the spring body 31, for example, the spring body 31 has two side ends, and taking the first spring body 311 as an example, the two side ends of the first spring body 311 are disposed opposite to each other in the length direction of the first spring body 311. A second elastic arm 33 is provided on both side ends of the first elastic body 311.
In the circular lens in the lens group 2, considering that the circular lens is a spherical lens, the circular lens is made of glass, and in order to improve the fixing reliability of the circular lens, when the cover plate 5 covers the accommodating chamber 11, the second elastic arm 33 abuts against the upper end surface of the circular lens. Referring to fig. 1, the lenses located in the upper left corner of the right accommodating chamber 11 and the lenses located in the lower right corner of the right accommodating chamber 11 are circular lenses.
Specifically, the elastic body abuts against a central region of the upper end surface of the circular lens, and the second elastic arm 33 abuts against an edge region of the upper end surface of the circular lens. In order to improve the symmetry of the fixation of the circular lens, two second elastic arms 33 extend out of the elastic body, and the two second elastic arms 33 are respectively located at two sides of the elastic body.
In an alternative embodiment, the square lenses in the lens group 2 are mainly aspheric lenses, and the square lenses are mainly plastic materials in consideration of the fact that the square lenses have influence on the beam transmission performance, and are only pressed in the central area of the upper end face of the square lenses through the elastic sheet body 31. For example, referring to fig. 1, in the left-side accommodation chamber 11, the lens disposed adjacent to the beam splitting prism is a square lens, and in the right-side accommodation chamber 11, the lens in the upper right corner is a square lens.
In an alternative embodiment, the second elastic arm 33 is inclined downward with respect to the elastic body 31 in order to facilitate a better fit of the second elastic to the edge area of the upper end surface of the circular lens.
It should be noted that, the structure of the second elastic arm 33 in the metal elastic sheet 3 in the embodiment is not limited to the arrangement shown in fig. 2, and a user may perform different designs on the arrangement of the second elastic arm 33 in the metal elastic sheet 3 according to the arrangement of different types of lenses in the accommodating cavity 11.
In one embodiment, referring to fig. 1 and 2, the metal spring plate 3 is provided with a hollowed portion 34.
In this embodiment, the metal spring 3 is provided with a hollow portion 34, for example, the hollow portion 34 can be designed at a place where the metal spring 3 is not required to be covered, so as to save materials and facilitate the assembly of the metal spring 3. For example, the metal spring plate 3 in a certain area of the metal spring plate 3 is hollowed out and removed, so that a hollowed-out part 34 is formed on the metal spring plate 3; or in an alternative embodiment, the metal spring 3 in a certain area of the metal spring 3 is cut, but not removed from the spring body 31, so that one side of the cut metal spring 3 is connected with the spring body 31, and in the process of fixing the lens, the cut metal spring 3 can be abutted with one surface of the lens, so that the reliability of fixing the lens is improved.
In an alternative embodiment, the elastic deformation pressure of the metal elastic sheet 3 is less than or equal to 4kgf, and the positioning accuracy is controlled to be +/-0.1 mm. In the embodiment, the elastic deformation pressure of the metal elastic sheet 3 is limited, and when the elastic deformation pressure exceeds 4kgf, the PV surface type overscaling risk of the lens exists; for example, when the elastic deformation pressure exceeds 4kgf, the optical surface structure of the lens is affected, and thus the transmission of light is affected.
In one embodiment, the metal spring 3 is made of iron, copper, aluminum, steel, or other alloy materials.
In one embodiment, referring to fig. 3, the connecting member is an elastic column 4, a first end of the elastic column 4 is connected to the cover 5, and a second end of the elastic column 4 is used for abutting against an upper end face of the lens.
In this embodiment, the elastic pressing portion is an elastic column 4, and for example, the elastic column 4 may include, but is not limited to, a silica gel column, a coil spring column, or the like.
In this embodiment, the first end of the elastic column 4 is connected to the cover plate 5, for example, the first end of the elastic column 4 is fixedly connected to the cover plate 5. After the elastic column 4 is arranged on the cover plate 5, when the cover plate 5 is covered on the optical machine shell 1, the elastic column 4 can generate elastic deformation, so that the second end of the elastic column 4 can be abutted with the upper end face of the lens. For example, the second end of the elastic post 4 can abut against a central region in the upper end face of the lens, or the second end of the elastic post 4 can abut against a central region and an edge region in the upper end face of the lens.
In this embodiment, the elastic column 4 is used to fix the lens in the optical housing 1, so that the glue fixing scheme in the prior art is avoided, the glue residue treatment cost is reduced, and the problem of volatilization caused by incomplete curing of the glue is solved. In addition, the lens is fixed in the optical housing 1 by using the elasticity of the elastic column 4, so that the scheme of glue fixing in the prior art is avoided, the man-hour of glue dispensing and curing is omitted, and the assembly efficiency is improved by more than 3 times.
In an alternative embodiment, the elastic column 4 is defined as a silica gel column, since the silica gel column has less heat conduction to the lens, since it is suitable for use in a less powerful, less bright optical projection device when the connector is configured as a silica gel column.
In an alternative embodiment, the elastic column 4 is a silica gel column, and the silica gel column is made of silica gel material, which can resist 160 ℃ at least. The shape of the silica gel column can be, but is not limited to, a cylindrical shape, a long strip shape, and a shaped silica gel column fitted with a shaped lens. When the silica gel column is of a cylindrical structure, one end of the silica gel column is connected with the cover plate 5, and after the cover plate 5 is locked, the silica gel column is pressed and attached to the center of the lens, so that the lens is fixed. Or the silica gel column is of a strip-shaped structure, one end of the silica gel column is connected with the cover plate 5, after the cover plate 5 is locked, the silica gel column presses and attaches the central position of the lens and the silica gel column covers the skirt edge (edge area) of the whole lens, so that the silica gel column elastically deforms and presses and attaches the lens, and the lens is fixed. In a specific embodiment, different areas of the upper surface of the lens may be selectively pressed and attached according to different shapes and different types of lenses.
In an alternative embodiment, the cost of opening the silica gel column is considered, and the silica gel column with the same shape is designed as much as possible, so that the cost of opening the silica gel column is saved. For example, the silica gel columns may be circular columns, rectangular columns, or the like.
In an alternative embodiment, the elastic deformation pressure of the silica gel column is equal to or less than 4kgf. In the embodiment, the elastic deformation pressure of the silica gel column is limited, and when the elastic deformation pressure exceeds 4kgf, the PV surface type overscaling risk of the lens exists; for example, when the elastic deformation pressure exceeds 4kgf, the optical surface structure of the lens is affected, and thus the transmission of light is affected.
In one embodiment, referring to fig. 3, the length of the elastic column 4 is a first length, and the distance between the inner surface of the cover 5 and the upper end surface of the lens is a second length, where the first length is equal to or greater than the second length.
In this embodiment, the cover plate 5 is pressed and covered on the optical engine housing 1, so that the elastic column 4 can abut against the upper end face of the lens, and the elastic column 4 is elastically deformed, and the length of the elastic column 4 and the distance from the inner surface of the cover plate 5 to the upper end face of the lens are defined in this embodiment, for example, the height of the silica gel column is designed as follows: at least more than 1 time the distance of the lens from the inner surface of the cover plate 5.
In one embodiment, the cover 5 is provided with a through hole, and the first end of the elastic column 4 extends into the through hole, so that the elastic column 4 is connected with the cover 5; or the inner surface of the cover plate 5 is provided with a concave part, and the first end of the elastic column 4 is embedded in the concave part so that the elastic column 4 is connected with the cover plate 5.
In this embodiment, in the case that the thickness of the cover plate 5 is thin, a through hole is opened in the cover plate 5, the through hole penetrates through the inner surface and the outer surface of the cover plate 5, and the first end of the elastic column 4 extends into the through hole and is tightly matched with the through hole, so that the elastic column 4 is connected with the cover plate 5; or in the case of thicker cover plate 5, form the depressed part at the internal surface of cover plate 5, the first end of elastic column 4 inlays and establishes in the depressed part to with the depressed part tight fit, make elastic column 4 and cover plate 5 connect.
In the present embodiment, the connection method between the elastic post 4 and the cover 5 is not particularly limited, as long as the elastic post 4 can be provided on the cover 5.
In one embodiment, the connecting piece is an adhesive piece, one end of the adhesive piece is adhered to the cover plate 5, and the other end of the adhesive piece is adhered to the upper end surface of the lens.
In this embodiment, the connecting member is an adhesive member, that is, an adhesive member is disposed between the cover plate 5 and the middle lens of the lens group 2, one end of the adhesive member is connected to the inner surface of the cover plate 5, and after the cover plate 5 is covered on the optical machine housing 1, the other end of the adhesive member can be adhered to the upper end surface of the lens. Therefore, in this embodiment, the dispensing position of the lens is improved when the lens is fixed by glue, and instead, an adhesive is formed between the upper end surface of the lens and the inner surface of the cover plate 5 (i.e., the dispensing position is located between the lens and the cover plate 5) from the dispensing position formed between the lens and the side wall of the optical housing 1 in the prior art. For example, dispensing may be performed on the cover 5 (the dispensing position corresponds to the lens position), and the cover 5 may be covered on the optical engine housing 1, and at this time, an adhesive member (the adhesive member has a height dimension) provided on the cover 5 is adhered to the upper end surface of the lens. In this embodiment, the cover plate 5 is connected with the lens through the adhesive, so that the user can detach the lens conveniently.
In an alternative embodiment, the adhesive may be a lower cost, more temperature resistant, less volatile silicone, including but not limited to epoxy, UV, silicone, hot melt, and the like.
In an alternative embodiment, the lens is secured by selectively pressing on the central position of the lens, or on the central and peripheral regions of the lens, by means of an adhesive of the opto-mechanical cover plate 5.
The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.
While certain specific embodiments of the application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims.
Claims (10)
1. An optical projection device, the optical projection device comprising:
the optical engine comprises an optical engine shell (1) and a cover plate (5), wherein an accommodating cavity (11) is arranged in the optical engine shell (1), and the cover plate (5) is used for covering the accommodating cavity (11);
A lens group (2), the lens group (2) comprising a plurality of lenses, the lenses being located within the accommodation cavity (11);
The connecting piece is arranged between the lens group (2) and the cover plate (5), and the surface of the connecting piece far away from the cover plate (5) is abutted against the upper end face of each lens in the lens group (2) or is adhered to the upper end face of each lens in the lens group (2) under the condition that the cover plate (5) covers the accommodating cavity (11);
The connecting piece comprises a spring piece body (31) and a first elastic arm (32) connected with the spring piece body (31); the lens group (2) comprises a first lens (21) which is arranged opposite to the side wall of the optical machine shell (1);
Under the condition that the cover plate (5) covers the accommodating cavity (11), the elastic piece body (31) is abutted with the upper end face of each lens in the lens group (2), and the first elastic arm (32) is inserted between the first lens (21) and the side wall of the optical machine shell (1).
2. The optical projection device of claim 1, wherein the upper end surface of the lens includes a middle region and edge regions on both sides of the middle region, and the connector abuts or adheres to the middle region or the connector abuts or adheres to the middle region and the edge regions.
3. An optical projection device as claimed in claim 1 or 2, wherein the connection member is a resilient pressing portion.
4. An optical projection device according to claim 3, characterized in that the connection element is a metal spring plate (3), which metal spring plate (3) is in contact with the inner surface of the cover plate (5) close to the surface of the cover plate (5) in case the cover plate (5) covers the receiving cavity (11).
5. An optical projection device according to claim 4, characterized in that the metal dome (3) comprises a second elastic arm (33), the side end of the dome body (31) extending out of the second elastic arm (33);
the lens group (2) comprises a circular lens, and the second elastic arm (33) is abutted with the edge area of the upper end face of the circular lens under the condition that the cover plate (5) covers the accommodating cavity (11).
6. The optical projection device according to claim 4, wherein the metal spring sheet (3) is provided with a hollowed-out portion (34).
7. An optical projection device as claimed in claim 3, characterized in that the connection element is a flexible column (4), a first end of the flexible column (4) being connected to the cover plate (5), a second end of the flexible column (4) being adapted to abut against an upper end face of the lens.
8. An optical projection device according to claim 7, characterized in that the length of the elastic column (4) is a first length, the distance between the inner surface of the cover plate (5) and the upper end surface of the lens is a second length, the first length being larger than or equal to the second length.
9. An optical projection device according to claim 7, wherein the cover plate (5) is provided with a through hole, and the first end of the elastic column (4) extends into the through hole, so that the elastic column (4) is connected with the cover plate (5); or a concave part is formed on the inner surface of the cover plate (5), and the first end of the elastic column (4) is embedded in the concave part so that the elastic column (4) is connected with the cover plate (5).
10. An optical projection device as claimed in claim 1, characterized in that the connecting element is an adhesive element, one end of which is adhered to the cover plate (5) and the other end of which is adapted to be adhered to the upper end face of the lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210531081.2A CN114859635B (en) | 2022-05-16 | 2022-05-16 | Optical projection equipment |
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| CN202210531081.2A CN114859635B (en) | 2022-05-16 | 2022-05-16 | Optical projection equipment |
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