CN211375286U

CN211375286U - Adjustable optical module and projector

Info

Publication number: CN211375286U
Application number: CN202020154995.8U
Authority: CN
Inventors: 陈益文
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2020-02-07
Filing date: 2020-02-07
Publication date: 2020-08-28
Anticipated expiration: 2030-02-07

Abstract

The utility model provides an optical module with adjustable, including optical element, carrier, frame, two first setting elements, base and two second setting elements. The bearing part or the frame comprises two first pivot shafts which protrude from two sides and extend along a first axis, and the other one comprises two first pivot holes. The two first pivot shafts are respectively positioned in the two first pivot holes. The frame or the base comprises two second pivot shafts which protrude from two sides and extend along a second axis, and the other one comprises two second pivot holes. The two second pivot shafts are respectively positioned in the two second pivot holes. The utility model provides a projector contains light source module, light valve, projection lens and above-mentioned adjustable optical module. The utility model provides an optical module and projector with adjustable can effectively avoid taking place radial movement or the problem of rocking for the pivot hole because of the pivot hole size is greater than the pivot that the pivot size leads to provide the optical effect of preferred.

Description

Adjustable optical module and projector

Technical Field

The utility model relates to an optical module and projector, especially, the utility model relates to an optical module and projector with adjustable.

Background

In the conventional adjustable optical module, the supporting member of the optical element and the frame are pivoted by the pivot and the pivot hole. Because the pivot needs to rotate in the pivot hole, the size of the pivot hole needs to be larger than that of the pivot so as to be placed in the pivot hole. In this case, there is a gap between the pivot shaft and the pivot hole, and during the shock test or the drop test, the bearing member of the optical element may be radially displaced relative to the frame due to the gap between the pivot shaft and the pivot hole member, thereby causing optical variation.

The background section is only used for illustrating the invention, and therefore the disclosure in the background section may include some known techniques which are not known to those skilled in the art. The disclosure in the "background" section does not represent that item or the problem which is addressed by one or more embodiments of the present invention is known or recognized by those skilled in the art before the filing of the present application.

SUMMERY OF THE UTILITY MODEL

The utility model provides an optical module with adjustable, it can avoid optical element's the pivot between carrier and the frame to radially displace for the pivot hole.

The utility model provides a projector, it contains above-mentioned adjustable optical module.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

To achieve one or a part of or all of the above or other objects, according to an embodiment of the present invention, an adjustable optical module includes an optical element, a carrier, a frame, two first positioning members, a base, and two second positioning members. The carrier carries the optical element. One of the bearing part and the frame comprises two first pivot shafts which protrude from two sides and extend along a first axis, the other one of the bearing part and the frame comprises two first pivot holes, and the two first pivot shafts are respectively positioned in the two first pivot holes. The two first positioning pieces are positioned on the first axis and are pressed against the two tail ends of the two first pivots. One of the frame and the base comprises two second pivots which protrude from two sides and extend along a second axis, the other one comprises two second pivot holes, and the two second pivots are respectively positioned in the two second pivot holes. The two second positioning parts are positioned on the second axis and are pressed against the two tail ends of the two second pivots.

According to another embodiment of the present invention, the projector includes a light source module, a light valve, a projection lens, and an adjustable optical module. The light source module is used for emitting an illumination light beam. The light valve is used for converting the illumination beam into an image beam. The projection lens is used for projecting image beams. The adjustable optical module is configured on the path of the illumination light beam or the path of the image light beam. The adjustable optical module comprises an optical element, a bearing piece, a frame, two first positioning pieces, a base and two second positioning pieces. The carrier carries the optical element. One of the bearing part and the frame comprises two first pivot shafts which protrude from two sides and extend along a first axis, the other one of the bearing part and the frame comprises two first pivot holes, and the two first pivot shafts are respectively positioned in the two first pivot holes. The two first positioning pieces are positioned on the first axis and are pressed against the two tail ends of the two first pivots. One of the frame and the base comprises two second pivots which protrude from two sides and extend along a second axis, the other one comprises two second pivot holes, and the two second pivots are respectively positioned in the two second pivot holes. The two second positioning parts are positioned on the second axis and are pressed against the two tail ends of the two second pivots.

To sum up, the adjustable optical module of the present invention maintains the position of the two first pivots relative to the two first pivot holes by disposing the two first positioning members on the first axis and abutting against the two ends of the two first pivots, so that the two first pivots do not move radially in the two first pivot holes. Similarly, the two second positioning members are disposed on the second axis and press against the two ends of the two second pivots, and the two first positioning members and the two ends of the two first pivots maintain the positions of the two second pivots relative to the two second pivot holes, so that the two second pivots cannot move radially in the two second pivot holes. Therefore, the adjustable optical module of the present invention can effectively avoid the problem that the pivot moves or rocks along the radial direction relative to the pivot hole due to the size of the pivot hole being larger than the size of the pivot hole. Therefore, the adjustable optical module of the present invention can provide a good optical effect.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

Fig. 1A is a schematic diagram of a projector according to an embodiment of the present invention;

fig. 1B is a schematic diagram of a projector according to another embodiment of the present invention;

FIG. 2 is a schematic diagram of an adjustable optical module according to an embodiment of the present invention;

FIG. 3 is an exploded view of the tunable optical module of FIG. 2;

FIG. 4 is a schematic view of another perspective of FIG. 3;

FIG. 5 is a cross-sectional view of the tunable optical module of FIG. 2;

FIG. 6 is a schematic cross-sectional view of the tunable optical module of FIG. 2 about a second axis;

FIG. 7 is a schematic cross-sectional view of the tunable optical module of FIG. 2 about a first axis;

FIGS. 8A and 8B are enlarged partial views of FIG. 5;

fig. 9A is a schematic partial cross-sectional view of an adjustable optical module according to another embodiment of the present invention;

FIG. 9B is an axial schematic view of the first pivot of FIG. 9A;

fig. 9C is an axial schematic view of a first pivot of an adjustable optical module according to another embodiment of the present invention;

fig. 10 is a schematic partial cross-sectional view of an adjustable optical module according to an embodiment of the present invention.

The reference numbers illustrate:

θ 1, θ 2: an included angle;

a1: a first axis;

a2: a second axis;

d1: a first inner diameter;

d2: a second inner diameter;

d3: a third inner diameter;

d4: a fourth inner diameter;

l1: an illumination beam;

l2: an image beam;

r1, R2: an outer diameter;

10. 10 a: a projector;

12: a light source module;

14: a light valve;

16: a projection lens;

100: an adjustable optical module;

110: an optical element;

120: a carrier;

130: a frame;

140: a base;

150. 150a, 150 b: a first pivot;

152. 152a, 152 b: a first recess;

154. 154c, 155: a first pivot hole;

156: a first bore section;

158: a second bore section;

160: a second pivot;

162: a second recess;

164. 165: a second pivot hole;

166: a third bore section;

168: a fourth bore section;

170. 171: a first positioning member;

172: a first fixing member;

174: a first plate portion;

176: a second plate portion;

178: a first cantilever;

180. 181: a second positioning member;

182: a second fixing member;

184: a third plate portion;

186: a fourth plate portion;

188: a second cantilever.

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of a preferred embodiment of the invention as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1A is a schematic diagram of a projector according to an embodiment of the present invention. Referring to fig. 1A, a projector 10 of the present embodiment includes a light source module 12, a light valve 14, a projection lens 16, and an adjustable optical module 100. The light source module 12 is used for emitting an illumination light beam L1. In the present embodiment, the light source module 12 includes, for example, a laser light source, but in other embodiments, the light source module 12 may also include a light emitting diode or other light sources. The light emitted by the light source module 12 is, for example, blue light, but may be other color light beams, and the disclosure is not limited thereto. For example, the light source module 12 may include a plurality of laser elements (not shown) arranged in an array, for example, the laser elements are Laser Diodes (LDs), for example. In other embodiments, there may be a plurality of light source modules 12. In other embodiments, the light source module 12 may be a solid-state illumination source (solid-state illumination source) including a light emitting diode (light emitting diode), for example. The light source module 12 may also include other optical elements, such as a phosphor wheel, etc., which are not described in detail herein.

In the present embodiment, the adjustable optical module 100 is disposed on the path of the illumination light beam L1. That is, the adjustable optical module 100 is disposed between the light source module 12 and the light valve 14 for adjusting the light path of the illumination light beam L1, but the position of the adjustable optical module 100 is not limited thereto.

In the present embodiment, the light valve 14 is used for converting the illumination beam L1 into the image beam L2. In the present embodiment, the light valve 14 is a reflective light modulator such as a Digital Micro-mirror Device (DMD) or a liquid crystal On Silicon (LCoS) panel. In some embodiments, the light valve 14 may be a transmissive light modulator such as a transmissive Liquid Crystal Panel (Liquid Crystal Display Panel), an Electro-Optic modulator (Electro-Optic modulator), a magneto-Optic modulator (magneto-Optic modulator), an Acousto-Optic modulator (AOM), or the like. The present disclosure is not limited to the type or kind of the light valve 14.

In the present embodiment, the projection lens 16 is used for projecting the image light beam L2. The projection lens 16 is located on the transmission path of the image beam L2 and can project the image beam L2 out of the projector 10 to display a picture on a screen, a wall surface, or other projection target. In the present embodiment, the projection lens 16 includes, for example, a combination of one or more non-planar optical lenses with refractive power, such as various combinations of non-planar lenses including a biconcave lens, a biconvex lens, a meniscus lens, a convex-concave lens, a plano-convex lens, and a plano-concave lens. In one embodiment, the projection lens 16 may also include a plane optical lens for projecting the image beam L2 from the light valve 14 out of the projector 10 in a reflective or transmissive manner. The present disclosure is not limited to the type and type of the projection lens 16.

Fig. 1B is a schematic diagram of a projector according to another embodiment of the present invention. Referring to fig. 1B, the main difference between the projector 10a of fig. 1B and the projector 10 of fig. 1A is the position of the adjustable optical module 100. In the present embodiment, the adjustable optical module 100 is disposed on the path of the image light beam L2. That is, the adjustable optical module 100 is disposed between the light valve 14 and the projection lens 16 for adjusting the optical path of the image light beam L2.

In the above embodiments, the adjustable optical module 100 can be designed to avoid the pivot shaft moving or shaking along the radial direction relative to the pivot hole, so as to provide a good optical effect. The adjustable optical module 100 will be described in detail below.

Fig. 2 is a schematic diagram of an adjustable optical module according to an embodiment of the present invention. FIG. 3 is an exploded view of the tunable optical module of FIG. 2. Fig. 4 is a schematic view of another perspective of fig. 3. Referring to fig. 2 to 4, the adjustable optical module 100 includes an optical element 110, a carrier 120, a frame 130, two first positioning members 170 and 171 (fig. 3), a base 140, and two second positioning members 180 and 181 (fig. 3). The optical element 110 is, for example, a lens, a Dichroic Mirror (Dichroic Mirror), or a Mirror, but the type of the optical element 110 is not limited thereto.

In the present embodiment, the carrier 120 carries the optical element 110. The carrier 120 is located in the frame 130 and pivotally connected to the frame 130 along a first axis a 1. One of the carrier 120 and the frame 130 includes two first pivot shafts 150 protruding from both sides and extending along a first axis a1 (fig. 2), and the other includes two first pivot holes 154, 155. When the carrier 120 and the frame 130 are assembled together, the two first pivots 150 can be disposed in the two first pivot holes 154, 155, respectively. In the embodiment shown in fig. 3, the carrier 120 includes two first pivot shafts 150 protruding from both sides and extending along the first axis a1, and the frame 130 includes two first pivot holes 154, 155. However, the present invention is not limited thereto, and in other embodiments, the frame 130 may include two first pivots 150 protruding from both sides inward toward the carrier 120 and extending along the first axis a1, and the carrier 120 may include two first pivot holes 154, 155.

In the present embodiment, as shown in fig. 3, in the present embodiment, one of the two first pivot holes 154, 155 is a ring-shaped hole with a closed edge, and the other one is a horseshoe-shaped hole with a non-closed edge, such as a U-shaped hole. More specifically, in fig. 3, the first pivot hole 154 on the left side of the frame 130 is a ring-shaped hole with a closed edge, and the first pivot hole 155 on the right side of the frame 130 is a horseshoe-shaped hole with a non-closed edge, but the present invention is not limited thereto.

In the above embodiment, the shape of the first pivot holes 154 and 155 can allow an assembler to insert the first pivot shaft 150 on the left side of the carrier 120 shown in fig. 3 into the first pivot hole 154 (annular hole) on the left side of the frame 130 and then insert the first pivot shaft 150 on the right side of the carrier 120 into the first pivot hole 155 (horseshoe-shaped hole) on the right side of the frame 130 when assembling the carrier 120 to the frame 130, thereby increasing the convenience of assembly. In addition, the shape of the first pivot holes 154 and 155 can prevent the pivot shaft from being deformed by assembly.

In addition, in the present embodiment, the frame 130 is pivotally connected to the base 140 along a second axis a 2. One of the frame 130 and the base 140 includes two second pivots 160 protruding from two sides and extending along the second axis a2 (fig. 2), and the other includes two second pivot holes 164, 165. When the frame 130 and the base 140 are assembled together, the two second pivots 160 can be respectively located in the two second pivot holes 164, 165. In the embodiment shown in fig. 3, the frame 130 includes two second pivots 160 protruding from two sides and extending along the second axis a2, and the base 140 includes two second pivot holes 164, 165. However, the present invention is not limited thereto, and in other embodiments, the base 140 may include two second pivots 160 protruding from both sides inward toward the frame 130 and extending along the second axis a2, and the frame 130 may include two second pivot holes 164, 165. Similarly, one of the two second pivot holes 164, 165 is a ring-shaped hole with a closed edge, and the other one is a horseshoe-shaped hole with a non-closed edge, so as to facilitate the assembly and prevent the second pivot 160 from deforming during the assembly process. In the present embodiment, the first axis a1 is perpendicular to the second axis a 2.

It should be noted that in the present embodiment, the two

first positioning elements

170, 171 are located on the first axis a1 and press against two ends of the two first pivots 150. The two

second positioning members

180, 181 are located on the second axis a2 and press against the two ends of the two second pivots 160.

FIG. 5 is a cross-sectional view of the tunable optical module of FIG. 2. FIG. 6 is a schematic cross-sectional view of the tunable optical module of FIG. 2 about a second axis. Fig. 7 is a schematic cross-sectional view of the tunable optical module 100 of fig. 2 about a first axis. Referring to fig. 5 to 7, in the present embodiment, the adjustable optical module 100 maintains the positions of the two first pivots 150 relative to the two first pivot holes 154 and 155 by disposing the two

first positioning elements

170 and 171 on the first axis a1 and pressing against the two ends of the two first pivots 150, so that the two first pivots 150 do not move in the two first pivot holes 154 and 155 along the radial direction of the first pivot holes 154 and 155. Similarly, the two

second positioning members

180, 181 are disposed on the second axis a2 and press against the two ends of the two second pivots 160 to maintain the positions of the two second pivots 160 relative to the two second pivot holes 164, 165, so that the two second pivots 160 do not move in the two second pivot holes 164, 165 along the radial directions of the two second pivot holes 164, 165.

Therefore, the adjustable optical module 100 of the present invention can effectively avoid the problem that the pivot moves or rocks along the radial direction relative to the pivot hole due to the fact that the inner diameter of the pivot hole is larger than the outer diameter of the pivot. Therefore, the adjustable optical module 100 of the present invention can provide a good optical effect.

In the present embodiment, the

first positioning members

170, 171 and/or the

second positioning members

180, 181 are spheres, such as steel balls, but the materials and shapes of the

first positioning members

170, 171 and the

second positioning members

180, 181 are not limited thereto. The

first positioning elements

170, 171 are spherical, which can reduce the contact area (for example, but not limited to, line contact or point contact) between the

first positioning elements

170, 171 and the first pivot 150, and reduce the friction between the two, so as to avoid affecting the rotation of the first pivot 150. The

second positioning members

180 and 181 are spherical, so that the contact area (for example, a line contact or a point contact, but not limited thereto) between the

second positioning members

180 and 181 and the second pivot 160 can be reduced, and the friction between the two can be reduced, thereby preventing the second pivot 160 from being influenced.

In the present embodiment, as can be seen from fig. 3, 5 and 7, the tunable optical module 100 of the present embodiment further includes a first fixing member 172 and a first cantilever 178. For example, in the embodiment shown in fig. 3, the first fixing member 172 is fixed on the frame 130 or the carrier 120 having the first pivot hole 155, the pair of first fixing members 172 is located in the first pivot hole 155, the first positioning member 170 is located between the first fixing member 172 and the corresponding first pivot 150, and the first fixing member 172 presses the first positioning member 170 to the end of the corresponding first pivot 150. For example, one end of the first suspension arm 178 is fixed on the frame 130 or the carrier 120 having the first pivot hole 154, and the pair of first suspension arms 178 is located at the first pivot hole 154, the first positioning member 171 is located between the first suspension arm 178 and the corresponding first pivot 150, and the first suspension arm 178 presses the first positioning member 171 against the end of the corresponding first pivot 150. However, the present invention is not limited thereto, and in other embodiments, the first fixing member 172 may be disposed corresponding to the first pivot hole 154, and the first suspension arm 178 may be disposed corresponding to the first pivot hole 155.

Specifically, in the embodiment shown in fig. 3, the first fixing member 172 is disposed on the frame 130, and one end of the first suspension arm 178 is fixed to the frame 130.

In the adjustable optical module 100 of the present embodiment, two ends of the first fixing element 172 are fixed to the frame 130, and a single end of the first cantilever 178 is fixed to the frame 130, so as to push against the

first positioning elements

170 and 171. Due to the mechanical manufacturing tolerance of each component (e.g., the frame 130), if the two first pivots 150 are pressed against the two

first positioning members

170, 171 by the first fixing member 172, for example, the tolerance between the components may cause assembly failure or difficulty. Similarly, if the two first pivots 150 are pressed against the two

first positioning members

170 and 171 by the first suspension arm 178, for example, the supporting member 120 can achieve a wider adjustment range, so that the frame 130 is more easily swayed and more difficult to achieve high-precision adjustment.

In the embodiment, the two first pivots 150 are respectively provided with the first fixing member 172 and the first suspension arm 178, and the fixed first fixing member 172 and the elastically deformable first suspension arm 178 enable the supporting member 120 to move properly in the frame 130 around the first axis a1, which also can achieve a high precision adjustment. The first suspension arm 178 is, for example, a metal dome.

As shown in fig. 2 and 7, in the present embodiment, the first fixing member 172 includes a first plate portion 174 and a second plate portion 176 that are connected in a bending manner, an included angle θ 2 (shown in fig. 7) between the first plate portion 174 and the second plate portion 176 is between 70 degrees and 90 degrees, and the first plate portion 174 and the second plate portion 176 of the first fixing member 172 are pressed against the first positioning member 170. The range of the angle θ 2 allows the first plate portion 174 and the second plate portion 176 to provide a clamping force to the first positioning member 170, so that the first positioning member 170 is pressed against the end of the first pivot 150 more firmly. Of course, the angle θ 2 between the first plate portion 174 and the second plate portion 176 is not limited thereto.

In the present embodiment, as can be seen from fig. 3, 5 and 6, the adjustable optical module 100 of the present embodiment further includes a second fixing member 182 and a second cantilever 188. For example, in the embodiment shown in fig. 3, the second fixing member 182 is fixed on the frame 130 or the base 140 having the second pivot hole 165, the second fixing member 182 is aligned with the second pivot hole 165, the second positioning member 180 is located between the second fixing member 182 and the corresponding second pivot 160, and the second fixing member 182 presses the second positioning member 180 against the end of the corresponding second pivot 160. For example, one end of the second cantilever 188 is fixed on the frame 130 or the base 140 having the second pivot hole 164, the second cantilever 188 is positioned in two second pivot holes 164, the second positioning member 181 is positioned between the second cantilever 188 and the corresponding second pivot 160, and the second cantilever 188 presses the second positioning member 181 to the end of the corresponding second pivot 160. However, the present invention is not limited thereto, and in other embodiments, the second fixing member 182 may be disposed corresponding to the second pivot hole 164, and the second suspension arm 188 may be disposed corresponding to the first pivot hole 165. The second cantilever 188 is, for example, a metal spring.

Specifically, in the embodiment shown in fig. 3, second mount 182 is disposed on base 140, and one end of second cantilever 188 is fixed to base 140.

In the present embodiment, the advantage of the matching of the second fixing part 182 and the second suspension arm 188 is similar to the matching of the first fixing part 172 and the first suspension arm 178, and details thereof are omitted.

As shown in fig. 2 and fig. 6, in the present embodiment, the second fixing member 182 includes a third plate portion 184 and a fourth plate portion 186 that are connected in a bending manner, an included angle θ 1 (shown in fig. 6) between the third plate portion 184 and the fourth plate portion 186 is between 70 degrees and 90 degrees, and the third plate portion 184 and the fourth plate portion 186 of the second fixing member 182 are pressed against the second positioning member 180. The range of the angle θ 1 allows the third plate 184 and the fourth plate 186 to provide a clamping force to the second positioning element 180, so that the second positioning element 180 is pressed against the end of the second pivot 160 more firmly. Of course, the angle θ 1 between the third plate portion 184 and the fourth plate portion 186 is not limited thereto. Fig. 8A and 8B are partially enlarged views of fig. 5. Referring to fig. 8A, fig. 8A is a partially enlarged view of the first positioning element 171 in fig. 5, and the first cantilever 178 is omitted. In the embodiment, the first pivot hole 154 is a stepped hole or a funnel hole in the depth direction, and the first positioning member 171 is located in the first pivot hole 154. For example, in the present embodiment, the first pivot hole 154 is a stepped hole in the depth direction, and includes a first hole section 156 and a second hole section 158, wherein the first hole section 156 and the second hole section 158 have a first inner diameter D1 and a second inner diameter D2, respectively. The first stopper 171 corresponding to the first pivot hole 154 is positioned in the first pivot hole 154, and the outer diameter R1 of the first stopper 171 is smaller than the first inner diameter D1 of the first bore section 156 and larger than the second inner diameter D2 of the second bore section 158. As shown in fig. 8A, in the present embodiment, the first positioning member 171 is in line contact with the inner wall surface of the first pivot hole 154 between the first hole section 156 and the second hole section 158.

In addition, the outer diameter R2 of the first pivot shaft 150 is smaller than the second inner diameter D2 of the second bore section 158 of the first pivot bore 154, and the first pivot shaft 150 is located within the second bore section 158 of the first pivot bore 154. In the embodiment shown in fig. 8A, the end of the first pivot 150 has a first recess 152, the first positioning element 171 is partially located in the first recess 152, the first recess 152 is a funnel-shaped groove, and the first positioning element 171 and the first recess 152 are in line contact to reduce the friction between the first pivot 150 and the first positioning element 171.

Referring to fig. 8B, fig. 8B is a partially enlarged view of the second positioning element 181 shown in fig. 5, and the second cantilever 188 is omitted. In this embodiment, the second pivot hole 164 is a stepped hole or a funnel hole in the depth direction, and the second positioning member 181 is located in the second pivot hole 164. For example, in the present embodiment, the second pivot hole 164 is a stepped hole in the depth direction and includes a third hole section 166 and a fourth hole section 168, wherein the third hole section 166 and the fourth hole section 168 have a third inner diameter D3 and a fourth inner diameter D4, respectively. The second positioning member 181 corresponding to the second pivot hole 164 is located in the second pivot hole 164, and the outer diameter R1 of the second positioning member 181 is smaller than the third inner diameter D3 of the third bore section 166 and larger than the fourth inner diameter D4 of the fourth bore section 168. As shown in fig. 8B, in the present embodiment, the second positioning element 181 is in line contact with the inner wall surface of the second pivot hole 164.

The outer diameter R2 of the second pivot shaft 160 is smaller than the fourth inner diameter D4 of the fourth bore section 168 of the second pivot bore 164, and the second pivot shaft 160 is located within the fourth bore section 168 of the second pivot bore 164. In the embodiment shown in fig. 8B, the end of the second pivot 160 has a second recess 162, the

second positioning members

180 and 181 are partially located in the second recess 162, the second recess 162 is a funnel-shaped groove, and the second positioning member 181 and the second recess 162 are in line contact, so as to reduce the friction between the second pivot 160 and the second positioning member 181.

Fig. 9A is a schematic partial cross-sectional view of an adjustable optical module according to another embodiment of the present invention. Fig. 9B is an axial schematic view of the first pivot 150a of fig. 9A. Referring to fig. 9A and 9B, the main difference between fig. 8A and 9A is the shape of the recess. In the present embodiment, the first recess 152a of the first pivot 150a is a circular groove. In an embodiment not shown, the second recess of the second pivot can also be a circular groove. In the embodiment shown in fig. 9A, the first recess 152a and the first positioning element 171 may be in line contact to reduce the friction between the first pivot 150a and the first positioning element 171, and the second recess of the second pivot and the second positioning element may be in line contact to reduce the friction between the second pivot and the second positioning element.

Fig. 9C is an axial view of a first pivot of an adjustable optical module according to another embodiment of the present invention. Referring to fig. 9C, the main differences between fig. 9B and fig. 9C are: in the embodiment shown in fig. 9C, the first recess 152b of the first pivot 150b is a polygonal groove. In an embodiment not shown, the second recess of the second pivot may also be a polygonal groove. In the embodiment shown in fig. 9C, the first recess 152b and the first positioning element 171 may be in line contact to reduce the friction between the first pivot 150b and the first positioning element 171, and the second recess of the second pivot and the second positioning element may be in line contact to reduce the friction between the second pivot and the second positioning element. Of course, the shapes of the first and second recesses are not limited thereto.

Fig. 10 is a schematic partial cross-sectional view of an adjustable optical module according to an embodiment of the present invention. Referring to fig. 10, the main difference between fig. 10 and fig. 8A is: in the embodiment shown in fig. 10, the first pivot hole 154c is a funnel-shaped hole in the depth direction. Of course, the second pivot hole may be a funnel-shaped hole in the depth direction. The first pivot 150 may be in line contact with an inner wall surface of the first pivot hole 154c to reduce a frictional force between the first pivot 150 and the inner wall surface of the first pivot hole 154c, but the shape of the first pivot hole 154c is not limited thereto.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, and all the simple equivalent changes and modifications made according to the claims and the contents of the present invention are still included in the scope of the present invention. Moreover, it is not necessary for any embodiment or claim to address all of the objects, advantages, or features disclosed herein. The abstract and the utility model name are only used for assisting the search of patent documents, and are not used for limiting the scope of rights of the utility model. Furthermore, the terms "first," "second," and the like in the description or in the claims are used only for naming elements or distinguishing different embodiments or ranges, and are not used for limiting an upper limit or a lower limit on the number of components.

Claims

1. An adjustable optical module, comprising an optical element, a carrier, a frame, two first positioning members, a base, and two second positioning members, wherein:

the bearing part bears the optical element;

one of the bearing piece and the frame comprises two first pivot shafts which protrude from two sides and extend along a first axis, and the other one of the bearing piece and the frame comprises two first pivot holes, wherein the two first pivot shafts are respectively positioned in the two first pivot holes;

the two first positioning pieces are positioned on the first axis and are pressed against the two tail ends of the two first pivots;

one of the frame and the base comprises two second pivot shafts which protrude from two sides and extend along a second axis, and the other one of the frame and the base comprises two second pivot holes, wherein the two second pivot shafts are respectively positioned in the two second pivot holes; and

the two second positioning parts are positioned on the second axis and are pressed against the two tail ends of the two second pivots.

2. The tunable optical module of claim 1, further comprising:

the first fixing piece is fixed on the frame or the bearing piece with the two first pivot holes and is aligned to one of the two first pivot holes, one of the two first positioning pieces is positioned between the first fixing piece and the corresponding first pivot, and the first fixing piece presses the corresponding first positioning piece to the tail end of the corresponding first pivot; and

and one end of the first cantilever is fixed on the frame or the bearing piece with the two first pivot holes and corresponds to the other one of the two first pivot holes, the other one of the two first positioning pieces is positioned between the first cantilever and the first pivot oppositely positioned, and the first cantilever presses the corresponding first positioning piece to the tail end of the corresponding first pivot.

3. The adjustable optical module according to claim 2, wherein the first fixing member comprises a first plate portion and a second plate portion connected by bending, an included angle between the first plate portion and the second plate portion ranges from 70 degrees to 90 degrees, and the first positioning member pressed by the first fixing member contacts the first plate portion and the second plate portion.

4. The tunable optical module of claim 1, further comprising:

the second fixing piece is fixed on the frame with the two second pivot holes and the base and is aligned to one of the two second pivot holes, one of the two second positioning pieces is positioned between the second fixing piece and the corresponding second pivot, and the second fixing piece presses the corresponding second positioning piece to the tail end of the corresponding second pivot; and

and one end of the second cantilever is fixed on the frame with the two second pivot holes and the base and is aligned with the other one of the two second pivot holes, the other one of the two second positioning pieces is positioned between the second cantilever and the corresponding second pivot, and the second cantilever presses the corresponding second positioning piece to the tail end of the corresponding second pivot.

5. The adjustable optical module according to claim 4, wherein the second fixing member comprises a third plate portion and a fourth plate portion connected by bending, an included angle between the third plate portion and the fourth plate portion ranges from 70 degrees to 90 degrees, and the second positioning member pressed by the second fixing member contacts the third plate portion and the fourth plate portion.

6. The adjustable optical module according to claim 1, wherein each of the first positioning elements and/or each of the second positioning elements is a sphere.

7. The adjustable optical module according to claim 1,

one of the two first pivot holes is an annular hole with a sealed edge, and the other one is a horseshoe hole with a non-sealed edge, or/and

one of the two second pivot holes is an annular hole with a sealed edge, and the other one is a horseshoe-shaped hole with a non-sealed edge.

8. The adjustable optical module according to claim 1,

each first pivot hole is a step-shaped hole or a funnel-shaped hole in the depth direction, and the first positioning piece is positioned in the first pivot hole or/and

each second pivot hole is a step-shaped hole or a funnel-shaped hole in the depth direction, and the second positioning piece is located in the second pivot hole.

9. The adjustable optical module according to claim 1,

each first pivot hole is a step-shaped hole in the depth direction and comprises a first hole section and a second hole section, wherein the first hole section and the second hole section are respectively provided with a first inner diameter and a second inner diameter,

the first positioning piece corresponding to the first pivot hole is positioned in the first pivot hole, and the outer diameter of the first positioning piece is smaller than the first inner diameter of the first hole section and larger than the second inner diameter of the second hole section.

10. The adjustable optical module according to claim 9,

the outer diameter of each first pivot is smaller than the second inner diameter of the second hole section of the corresponding first pivot hole, and each first pivot is located in the second hole section of the corresponding first pivot hole.

11. The adjustable optical module according to claim 1,

each second pivot hole is a step-shaped hole in the depth direction and comprises a third hole section and a fourth hole section, wherein the third hole section and the fourth hole section are respectively provided with a third inner diameter and a fourth inner diameter,

the second positioning piece corresponding to the second pivot hole is positioned in the second pivot hole, and the outer diameter of the second positioning piece is smaller than the third inner diameter of the third hole section and larger than the fourth inner diameter of the fourth hole section.

12. The adjustable optical module according to claim 11,

the outer diameter of each second pivot shaft is smaller than the fourth inner diameter of the fourth hole section of the corresponding second pivot hole, and each second pivot shaft is located in the fourth hole section of the corresponding second pivot hole.

13. The adjustable optical module according to claim 1,

each first pivot has a first recess at the end, the first positioning member is partially located in the first recess, the first recess is a funnel-shaped recess, a circular recess or a polygonal recess, or/and

each the end of the second pivot has a second depressed part, the second positioning element is partially located in the second depressed part, and the second depressed part is a funnel-shaped groove, a circular groove or a polygonal groove.

14. A projector is characterized by comprising a light source module, a light valve, a projection lens and an adjustable optical module, wherein:

the light source module is used for emitting an illumination light beam;

the light valve is used for converting the illumination light beam into an image light beam;

the projection lens is used for projecting the image light beam; and

the adjustable optical module is disposed on the path of the illumination beam or on the path of the image beam, and the adjustable optical module includes an optical element, a bearing member, a frame, two first positioning members, a base and two second positioning members, wherein:

the bearing part bears the optical element;

15. The projector of claim 14 wherein the adjustable optical module further comprises:

and one end of the first cantilever is fixed on the frame or the bearing piece with the two first pivot holes and is aligned with the other one of the two first pivot holes, the other one of the two first positioning pieces is positioned between the first cantilever and the corresponding first pivot, and the first cantilever presses the corresponding first positioning piece to the tail end of the corresponding first pivot.

16. The projector as claimed in claim 15, wherein the first fixing member includes a first plate portion and a second plate portion connected by bending, an included angle between the first plate portion and the second plate portion is between 70 degrees and 90 degrees, and the first positioning member pressed by the first fixing member contacts the first plate portion and the second plate portion.

17. The projector of claim 14 wherein the adjustable optical module further comprises:

18. The projector as claimed in claim 17, wherein the second fixing member includes a third plate portion and a fourth plate portion connected by bending, an included angle between the third plate portion and the fourth plate portion ranges from 70 degrees to 90 degrees, and the second positioning member pressed by the second fixing member contacts the third plate portion and the fourth plate portion.

19. The projector as claimed in claim 14, wherein each of the first positioning members and/or each of the second positioning members is a sphere.

20. The projector as defined in claim 14,

21. The projector as defined in claim 14,

22. The projector as defined in claim 14,

23. The projector as claimed in claim 22, wherein an outer diameter of each of the first pivot shafts is smaller than the second inner diameter of the second hole segment of the corresponding first pivot hole, and each of the first pivot shafts is located in the second hole segment of the corresponding first pivot hole.

24. The projector as defined in claim 14,

25. The projector as defined in claim 24,

26. The projector as defined in claim 14,