Folding lens support and projection device

Abstract

The utility model provides a folding type lens support and a projection device, the folding type lens support comprises a base plate and a clamping piece which are rotatably connected, the base plate is provided with a first opening, a first clamping part, a first abutting part and a second abutting part, and the clamping piece is provided with a second opening and a second clamping part. And the second clamping part and the first clamping part are correspondingly clamped and matched so as to fix the lens between the bottom plate and the clamping piece. The first abutting part and the second abutting part are used for elastically abutting and fixing in a mounting groove of a shell of the optical engine, the mounting groove is provided with a first inner wall and a second inner wall which are opposite to each other, the first abutting part abuts against the first inner wall, and the second abutting part abuts against the second inner wall. The assembly process of the lens and the folding lens bracket can be simplified by the bottom plate and the clamping piece which are rotationally connected; in addition, the first abutting part and the second abutting part which are elastically fixed in the mounting groove in an abutting mode can further reinforce the position of the lens in the light path so as to ensure that the brightness of emitted light of the optical engine is maximum.

Description

Technical Field

[0001] The utility model relates to a lens bracket and a projection device, in particular to a foldable lens bracket and a projection device equipped with the foldable lens bracket. Background Art

[0002] In the optical engine of the projection device, each optical lens needs to be accurately positioned and fixed to avoid affecting the brightness and uniformity of the image projected by the projector. Figure 1 ), with a split bottom plate and clips, first place the lens on the bottom plate, fix the two with UV curing glue, and then clamp the bottom plate with the clips to reinforce the lens and prevent it from falling off. Figure 1 It can be seen that the traditional method of fixing optical lenses requires installation in steps, and also requires additional positioning structures, curing glue and related processing tools. The process is complicated, the assembly is inconvenient, and the production efficiency is low.

[0003] In addition, when the lens holder is installed into the optical engine after the lens is installed, it is also necessary to use light-curing glue or heat-curing glue to fix the lens holder. The curing of the glue takes time, and the lens holder may be displaced, which will lead to poor light output characteristics of the optical engine.

[0004] Therefore, how to provide a lens bracket that makes the lens easy to assemble and fix, and the bracket itself easy to fix, has become a new research topic. Utility Model Content

[0005] The utility model aims to provide a projection device comprising a foldable lens bracket, so as to solve the defects of complex assembly of the lens and the foldable lens bracket and the problem of easy deviation during the fixing process of the bracket.

[0006] Based on the above objectives, the utility model provides a foldable lens bracket, comprising:

[0007] A bottom plate, the bottom plate is provided with a first opening, a first clamping portion, a first abutting portion and a second abutting portion; and

[0008] A clip, the clip is provided with a second opening and a second clamping portion, wherein the second opening is opposite to the first opening;

[0009] The clip is rotatably connected to the base plate; the second clamping portion is correspondingly engaged with the first clamping portion to fix the lens between the base plate and the clip; the first abutting portion and the second abutting portion are used to elastically abut and fix in the mounting groove of the housing of the optical engine, wherein the mounting groove has a first inner wall and a second inner wall opposite to each other, the first abutting portion abuts against the first inner wall, and the second abutting portion abuts against the second inner wall.

[0010] Preferably, the first abutting portion and the second abutting portion are interference fit with the mounting groove.

[0011] Preferably, the second abutting portion is bent relative to the first abutting portion, and the first abutting portion and the second abutting portion extend in the same direction.

[0012] Preferably, the projection of the clip on the bottom plate does not overlap with the first abutting portion and the second abutting portion.

[0013] Preferably, the bottom plate and the clip are also used to be installed between the first inner wall and the second inner wall respectively.

[0014] Preferably, the first clamping portion and the second clamping portion are respectively in plurality and correspond one to one.

[0015] Preferably, the first clamping portion has a protrusion, and the second clamping portion has a buckling hole, and the protrusion passes through the buckling hole, so that the second clamping portion is buckled and matched with the first clamping portion.

[0016] Preferably, the bottom plate further has an inner peripheral end surface and a plurality of first position-limiting members, and the inner peripheral end surface extends toward the first opening relative to the first position-limiting members;

[0017] The inner peripheral end surface is used to abut against the surface side of the lens, and the plurality of first limiting members are used to abut against the peripheral side of the lens to position the lens.

[0018] Preferably, the clip further has a plurality of second limiting members, and the plurality of second limiting members are arranged on the inner periphery of the second opening to abut against and cooperate with the lens.

[0019] Based on the above objectives, the utility model also provides a projection device, an optical engine, and the optical engine includes:

[0020] The housing comprises a mounting groove having a first inner wall and a second inner wall opposite to each other;

[0021] Lenses; and

[0022] The above-mentioned foldable lens holder;

[0023] The lens is installed between the bottom plate and the clip of the foldable lens bracket, and the first abutment portion and the second abutment portion of the foldable lens bracket are elastically fixed in the mounting groove, and the first abutment portion abuts against the first inner wall, and the second abutment portion abuts against the second inner wall.

[0024] Compared with the prior art, the utility model provides a folding lens bracket and a projection device, the folding lens bracket comprises a rotatably connected bottom plate and a clip, the bottom plate is provided with a first opening, a first clamping portion, a first abutting portion and a second abutting portion, and the clip is provided with a second opening and a second clamping portion. The second clamping portion is correspondingly engaged with the first clamping portion to fix the lens between the bottom plate and the clip. The first abutting portion and the second abutting portion are used to elastically abut and be fixed in a mounting groove of a housing of an optical engine, wherein the mounting groove has a first inner wall and a second inner wall opposite to each other, the first abutting portion abuts against the first inner wall, and the second abutting portion abuts against the second inner wall. Thus, the rotatably connected bottom plate and the clip can simplify the assembly process of the lens and the folding lens bracket; the first abutting portion and the second abutting portion elastically abutted and fixed in the mounting groove can also reinforce the position of the lens in the optical path to avoid displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a lens bracket in the prior art;

[0026] Figure 2 It is a schematic diagram of the structure of an optical engine in one embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of an optical engine in one embodiment of the utility model from another viewing angle;

[0028] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle area A;

[0029] Figure 5 It is a structural schematic diagram of a foldable lens bracket in one embodiment of the utility model. DETAILED DESCRIPTION

[0030] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0031] Certain words are used in the specification and claims to refer to specific components. Those with ordinary knowledge in the field should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but rather use differences in components' functions as the criteria for distinction. The term "including" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to".

[0032] See also Figure 1, which is a schematic diagram of the structure of the lens holder in the prior art. The lens holder 30' in the prior art includes a split bottom plate 31' and a clip 32'. That is to say, when the lens is fixed by using the lens holder 30' in the prior art, it is usually necessary to first install the lens into the bottom plate 31', and then snap the buckle on the clip 32' into the card slot of the bottom plate 31' to fix the lens. It can be understood that the above-mentioned assembly steps need to include the operation of aligning the buckle on the clip 32' with the card slot of the bottom plate 31'. In order to improve production efficiency, the above-mentioned lens installation steps are usually carried out in an automated manner. The necessary alignment operation makes the automated production process more cumbersome, which is not conducive to improving production efficiency.

[0033] The utility model provides a foldable lens bracket and a projection device equipped with the foldable lens bracket. Specifically, the projection device (not shown in the figure) includes an optical engine 100, such as Figures 2 to 4As shown, the optical engine 100 includes a housing 10, a light source (not shown in the figure), a lens 20, and a folding lens holder 30. The light source is, for example, a laser light source, etc., mounted on the housing 10; and the housing 10 includes a mounting groove 11 for clamping the folding lens holder 30 assembled with the lens 20, so that the lens 20 is fixed on the light output path of the light source. The folding lens holder 30 includes a bottom plate 31 and a clip 32, the bottom plate 31 is provided with a first opening 313 and a first clamping portion 314, the clip 32 is provided with a second opening 322 and a second clamping portion 314, and the second opening 322 is opposite to the first opening 313. The clip 32 is rotatably connected to the bottom plate 31, the clip 32 is folded relative to the bottom plate 31, and the second clamping portion 323 on the clip 32 is correspondingly engaged with the first clamping portion 314 on the bottom plate 31, so that the lens 20 is fixed between the bottom plate 31 and the clip 32, and the lens 20 is exposed to the first opening 313 and the second opening 322 respectively, so that light penetrates the lens 20 to propagate. In other words, the lens 20 is assembled using the folding lens bracket 30 provided by the utility model, and the lens 20 only needs to be placed in the bottom plate 31, and then the clip 32 is folded relative to the bottom plate 31, so that the lens 20 can be installed and fixed. In this embodiment, the light entrance portion of the lens 20 is exposed from the second opening 322, and the light exit portion of the lens 20 is exposed from the first opening 313, but the utility model is not limited thereto. It should be noted that the structure in which the clip 32 is rotatably connected to the bottom plate 31 allows the second clamping portion 323 to be pre-aligned with the first clamping portion 314, which means that there is no need for additional operations to align the second clamping portion 323 with the first clamping portion 314. As long as the clip 32 is folded relative to the bottom plate 31, the second clamping portion 323 can be ensured to be directly opposite to the first clamping portion 314 and can be smoothly engaged with the first clamping portion 314 during the folding process. Preferably, the first clamping portion 314 and the second clamping portion 323 have multiple and one-to-one corresponding parts, and the structure in which the clip 32 is rotatably connected to the bottom plate 31 can also allow the multiple second clamping portions 323 to be pre-aligned with the first clamping portion 314 one by one. Furthermore, as Figure 5 As shown, one set of the first clamping portion 314 and the second clamping portion 323 is opposite to the position of the rotating connection portion of the clip 32 and the bottom plate 31 to achieve the most stable clamping fit.

[0034] In this embodiment, if Figure 5As shown, the first clamping portion 314 is a clamping slot 314, and the clamping slot 314 has a protrusion 314a extending in the radial direction of the bottom plate 31, and the second clamping portion 323 is a spring 323 extending in the axial direction of the clip 32, and the spring 323 has a snap-fitting hole 323a. When the spring 323 moves along its extension direction to be inserted into the clamping slot 314, the protrusion 314a presses the spring 323, so that the spring 323 is deformed along the extension direction of the protrusion 314a, until the position of the snap-fitting hole 323a on the spring 323 moves to the protrusion 314a, and the spring 323 thereby obtains a rebound space and resets, and the protrusion 314a passes through the snap-fitting hole 323a, so that the second clamping portion 323 is snap-fitted with the first clamping portion 314. In other embodiments, the spring sheet may have a protrusion, and the side wall of the card slot may have a snap-fit ​​hole (not shown in the figure), wherein the spring sheet may also be located on the bottom plate 31 (i.e., the first card portion 314), and the card slot may also be located on the clip 31 (i.e., the second card portion 323), but the present invention is not limited thereto. In this way, during the installation process of the lens 20, the alignment operation of the first card portion 314 and the second card portion 323 can be reduced, which is conducive to improving the assembly efficiency and facilitating the assembly automation; in addition, through the rotational connection between the clip 32 and the bottom plate 31, the number of parts of the lens bracket can be reduced, which is conducive to reducing the number of material extraction times on the automated production line and shortening the assembly time of the parts.

[0035] In a preferred embodiment, the clip 32 and the bottom plate 31 are integrally formed. For example, the foldable lens holder 30 is made of plastic material, and a "V"-shaped notch (not shown in the figure) is provided on the inner surface of the folding direction of the foldable lens holder 30, so that the clip 32 can be folded relative to the bottom plate 31 through the notch. This specific structure is commonly found in a variety of bendable or foldable plastic parts, and will not be described in detail here. In other embodiments, the clip 32 and the bottom plate 31 can also be hinged by a hinge or other similar structure. In this case, the clip 32 and the bottom plate 31 can also be metal parts, and the utility model is not limited to this.

[0036] Better, such as Figures 3 to 5 As shown, the bottom plate 31 also has an inner peripheral end face 311 and a plurality of first stoppers 312. The inner peripheral end face 311 extends toward the first opening 313 relative to the first stopper 312. In other words, the inner peripheral end face 311 protrudes radially inwardly of the bottom plate 31 relative to the first stopper 312. When the lens 20 is inserted, the inner peripheral end face 311 abuts against the surface side of the lens 20, and the plurality of first stoppers 312 abut against the peripheral side of the lens 20 to position the lens 20. The first stopper 312 is, for example, a guide sheet, a guide block, a guide protrusion, etc., but the present invention is not limited thereto. Preferably, as Figures 3 to 5As shown, the clip 32 also has a plurality of second limiting members 321, which are arranged on the inner circumference of the second opening 322 to abut and cooperate with the lens 20, meaning that the lens 20 is limited between the plurality of second limiting members 321 to reinforce the position of the lens 20 in the folding lens holder 30. Among them, the second limiting member 321 is, for example, in the form of a guiding piece, a guiding block, a guiding protrusion, etc., and the present invention is not limited thereto.

[0037] In addition, when the lens holder is installed in the installation groove 11 of the optical engine 100, it is necessary to adjust the position of the lens holder in the radial plane of the lens 20, and then drive the lens 20 in the lens holder to move in its radial plane, so as to adjust the optical axis of the light path of the lens 20 facing the internal light path of the optical engine, thereby obtaining the best light effect. In the prior art, after determining the position of the lens 20 in the installation groove 11, it is usually necessary to use optical adhesive or thermosetting adhesive to fix the bottom plate 31'. The curing of the colloid takes time, and the lens holder 30' may shift in the light path, resulting in poor light output characteristics of the optical engine. Therefore, the installation efficiency of the lens holder 30' in the prior art is low, resulting in high production costs.

[0038] In this embodiment, the bottom plate 31 is further provided with a first abutting portion 31a and a second abutting portion 31b. At the same time, the installation groove 11 also has opposite first inner wall 111 and second inner wall 112, as Figure 4 shown, the folding lens holder 30 in the folded state is elastically held and fixed in the installation groove 11, the first abutting portion 31a abuts against the first inner wall 111, and the second abutting portion 31b abuts against the second inner wall 112. In other words, the bottom plate 31 is elastically abutted against the first inner wall 111 and the second inner wall 112 of the installation groove 11 by means of the first abutting portion 31a and the second abutting portion 31b, which does not affect the adjustment and alignment before further fixing and can maintain the adjusted position. In some other embodiments, on the basis of the first abutting portion 31a and the second abutting portion 31b maintaining the position of the bottom plate 31, the bottom plate 31 can be further reinforced by using colloid, and the position of the bottom plate 31 will not shift before the colloid is cured. In a preferred embodiment, the second abutting portion 31b is bent relative to the first abutting portion 31a, and the first abutting portion 31a and the second abutting portion 31b extend in the same direction. For example, as Figure 4 and Figure 5 shown, the second abutting portion 31b is in an "┐" shape, the first abutting portion 31a is in a "-" shape, and the second abutting portion 31b is bent relative to the first abutting portion 31a to jointly form a "ユ" shape; or, the first abutting portion and the second abutting portion can also be in the "┐" and "┘" shapes that are axisymmetric with respect to the bottom plate 31 to jointly form a "コ" shape (not shown in the figure); the present invention is not limited thereto.

[0039] In a preferred embodiment, the first abutting portion 31a and the second abutting portion 31b are interference fit with the mounting groove 11, that is, the folding lens holder 30 is elastically abutted and fixed in the mounting groove 11, and the first abutting portion 31a or the second abutting portion 31b can have a larger compression amount, thereby providing a larger elastic force to reinforce the position of the folding lens holder 30. In a preferred embodiment, as Figure 4 and Figure 5 As shown, the first abutting portion 31a is coplanar with the bottom plate 31 and is integrally formed, the second abutting portion 31b is an elastic member 31b, the folding lens holder 30 is elastically abutted and fixed in the mounting groove 11, the first abutting portion 31a contacts the first inner wall 111, the second abutting portion 31b contacts the second inner wall 112, and the second abutting portion 31b is compressed to provide elastic forces acting on the first inner wall 111 and the second inner wall 112 respectively, thereby reinforcing the position of the folding lens holder 30 in the mounting groove 11. Preferably, as Figures 3 to 5 As shown, the bottom plate 31 has two sets of first abutting portions 31 a and second abutting portions 31 b opposite to each other, and the housing 10 includes two mounting grooves 11 opposite to each other. Each set of first abutting portions 31 a and second abutting portions 31 b is correspondingly interference-fitted in one mounting groove 11 .

[0040] Preferably, a gasket (not shown) may be further provided on the second abutting portion 31b, and the second abutting portion 31b contacts the second inner wall 112 via the gasket. For example, the gasket may be made of rubber, silicone, or other materials to further reinforce the position of the foldable lens bracket 30 in the mounting groove 11.

[0041] In a preferred embodiment, the bottom plate 31 and the clip 32 are also used to be installed between the first inner wall 111 and the second inner wall 112, respectively. In other words, the installation groove 11 holds the bottom plate 31 and the clip 32 in the folded state, so that the clip 32 and the bottom plate 31 can remain in the folded state without being spread out. Preferably, the projection of the clip 32 on the bottom plate 31 does not overlap with the first abutting portion 31a and the second abutting portion 31b. In other words, the size of the clip 32 is smaller than the size of the bottom plate 31, and the first abutting portion 31a and the second abutting portion 31b extend to a position away from the clip 32.

[0042] In this embodiment, after the lens 20 is fixed in the foldable lens bracket 30 and installed in the installation groove 11, the first abutting portion 31a and the bottom plate 31 abut against the first inner wall 111, and the second abutting portion 31b and the clip 32 abut against the second inner wall 112; in other embodiments, a gap is left between the bottom plate and the first inner wall 111, and / or a gap is left between the clip and the second inner wall 112; or, the positions of the bottom plate and the clip can also be swapped with each other (not shown in the figure); the utility model is not limited to this.

[0043] In summary, the utility model provides a foldable lens holder and a projection device, the foldable lens holder comprises a rotatably connected bottom plate and a clip, the bottom plate is provided with a first opening, a first clamping portion, a first abutting portion and a second abutting portion, and the clip is provided with a second opening and a second clamping portion. The second clamping portion is correspondingly engaged with the first clamping portion to fix the lens between the bottom plate and the clip. The first abutting portion and the second abutting portion are used to elastically abut and be fixed in a mounting groove of a housing of an optical engine, wherein the mounting groove has a first inner wall and a second inner wall opposite to each other, the first abutting portion abuts against the first inner wall, and the second abutting portion abuts against the second inner wall. Thus, the rotatably connected bottom plate and the clip can simplify the assembly process of the lens and the foldable lens holder; the first abutting portion and the second abutting portion elastically abutted and fixed in the mounting groove can also reinforce the position of the lens in the optical path to avoid displacement.

[0044] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A foldable lens holder, characterized in that: include A bottom plate, the bottom plate is provided with a first opening, a first clamping portion, a first abutting portion and a second abutting portion; as well as A clip, the clip is provided with a second opening and a second clamping portion, wherein the second opening is opposite to the first opening; The clip is rotatably connected to the base plate; the second clamping portion is correspondingly engaged with the first clamping portion to fix the lens between the base plate and the clip; the first abutting portion and the second abutting portion are used to elastically abut and fix in the mounting groove of the housing of the optical engine, wherein the mounting groove has a first inner wall and a second inner wall opposite to each other, the first abutting portion abuts against the first inner wall, and the second abutting portion abuts against the second inner wall.

2. The foldable lens holder according to claim 1, characterized in that: The first abutting portion and the second abutting portion are interference-fitted with the mounting groove.

3. The foldable lens holder according to claim 1, characterized in that: The second abutting portion is bent relative to the first abutting portion, and the first abutting portion and the second abutting portion extend in the same direction.

4. The foldable lens holder according to claim 1, characterized in that: The projection of the clip on the bottom plate does not overlap with the first abutting portion and the second abutting portion.

5. The foldable lens holder according to claim 1, characterized in that: The bottom plate and the clip are also used to be installed between the first inner wall and the second inner wall respectively.

6. The foldable lens holder according to claim 1, characterized in that: The first clamping portion and the second clamping portion are respectively provided in plurality and correspond to each other one by one.

7. The foldable lens holder according to claim 1, characterized in that: The first clamping portion has a protrusion, and the second clamping portion has a buckling hole. The protrusion passes through the buckling hole, so that the second clamping portion is buckled and matched with the first clamping portion.

8. The foldable lens holder according to claim 1, characterized in that: The bottom plate also has an inner peripheral end surface and a plurality of first position-limiting members, and the inner peripheral end surface extends toward the first opening relative to the first position-limiting members; The inner peripheral end surface is used to abut against the surface side of the lens, and the plurality of first limiting members are used to abut against the peripheral side of the lens to position the lens.

9. The foldable lens holder according to claim 1, characterized in that: The clip also has a plurality of second limiting members, which are arranged on the inner periphery of the second opening to abut against and cooperate with the lens.

10. A projection device, comprising an optical engine, characterized in that: The optical engine includes: The housing comprises a mounting groove having a first inner wall and a second inner wall opposite to each other; Lenses; and A foldable lens support according to any one of claims 1 to 9; The lens is installed between the bottom plate and the clip of the foldable lens bracket, and the first abutment portion and the second abutment portion of the foldable lens bracket are elastically fixed in the mounting groove, and the first abutment portion abuts against the first inner wall, and the second abutment portion abuts against the second inner wall.

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