CN212391699U

CN212391699U - Fixed module, projection lens assembly and projector

Info

Publication number: CN212391699U
Application number: CN202021100190.1U
Authority: CN
Inventors: 顾苍兴
Original assignee: Delta Electronics Inc
Current assignee: Delta Electronics Inc
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-01-22
Anticipated expiration: 2030-06-15

Abstract

A projection lens assembly includes a base, a lens module and a fixing module. The lens module is connected with the base and is provided with at least one adjusting ring, and the at least one adjusting ring is located at a specific position. The adjusting ring has a first coupling portion and is configured to rotate about a first axis. The fixed module comprises a shell, a driving piece and a moving piece. The housing is fixed to the base. The driving member is rotatably disposed in the housing and configured to rotate about a second axis. The second axis is perpendicular to the first axis. The moving member is connected with the driving member and has a second joint portion. When the moving piece is driven by the rotating driving piece to move away from the shell to reach the position, the first combining part is combined with the second combining part.

Description

Fixed module, projection lens assembly and projector

Technical Field

The utility model relates to a fixed module, projection lens subassembly and projector.

Background

Currently, when a commercial/home theater projector is used, the focus and the size of the projection lens are adjusted according to the actual environment, so that the projected image can achieve the best viewing quality. Specifically, when a projection lens module of a projector is designed, two adjustment rings are generally used for adjusting a picture, namely, adjusting a focal length of the picture and adjusting a size of the picture.

However, if the preset adjusting torque of the two adjusting rings is too small, the adjusted image is easily dropped and distorted by the sudden external force. At this time, the user must readjust to the distorted picture. In addition, some designs may install an electric deceleration motor module to drive the adjusting ring to adjust the picture, but this requires more development labor and higher cost. Moreover, when the electric deceleration motor module is used for picture adjustment, noise is generated due to the operation of the electric deceleration motor module.

Therefore, it is one of the issues that the industry needs to invest in research and development resources to solve to provide a fixed module, a projection lens assembly and a projector that can solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a fixing module, a projection lens assembly and a projector that can effectively solve the above problems.

To achieve the above object, the present invention provides a fixing module disposed on a lens module, the lens module having at least one adjusting ring, the at least one adjusting ring being located at a specific position, the at least one adjusting ring having a first coupling portion, wherein the fixing module comprises:

a housing;

a driving member rotatably disposed in the housing and configured to rotate about an axis; and

and the moving piece is connected with the driving piece and is provided with a second combining part, and when the moving piece is driven by the rotating driving piece to move away from the shell to reach the position, the first combining part is combined with the second combining part.

In the above-mentioned fixing module, the housing has a through hole, and the driving member can rotatably engage with the through hole.

The fixing module above, wherein the driving member comprises:

a pivot part, which is pivoted to the through hole;

an operating part connected with one end of the pivoting part; and

and the connecting part is connected with the other end of the pivoting part and is connected with the moving part, and the operating part and the connecting part are respectively positioned on two opposite sides of the shell.

In the above-mentioned fixing module, a portion of the housing is limited between the operating portion and the connecting portion.

In the above-mentioned fixed module, the driving member has a first thread structure, the moving member has a second thread structure, the first thread structure is screwed with the second thread structure, and the rotating driving member slides relative to the second thread structure through the first thread structure to drive the moving member to move.

In the above-mentioned fixed module, the housing has a receiving groove, and the receiving groove is configured to receive the moving member.

The fixing module further includes an elastic member disposed between the housing and the moving member and configured to reversely push the housing and the moving member.

In the above-mentioned fixing module, the second combining portion includes an elastic material.

In the above-mentioned fixed module, the moving member includes a holding portion, the holding portion is connected to the driving member and holds the second engaging portion, and the hardness of the holding portion is greater than that of the second engaging portion.

In the above-mentioned fixed module, when the moving member is driven by the rotating driving member to move toward the housing, the second engaging portion releases the first engaging portion.

To achieve the above object, the present invention also provides a projection lens assembly, which comprises:

a base;

a lens module connected with the base, the lens module having at least one adjusting ring, the at least one adjusting ring being located at a specific position, the at least one adjusting ring having a first combining portion and being configured to rotate around the first axis; and

a stationary module, comprising:

a housing fixed to the base;

the driving piece can be rotatably arranged on the shell and is configured to rotate by taking a second axis as a center, and the second axis is vertical to the first axis; and

In the above projection lens assembly, the housing has a through hole, and the driving member can be rotatably engaged with the through hole.

The projection lens assembly above, wherein the driving member comprises:

a pivot part, which is pivoted to the through hole;

an operating part connected with one end of the pivoting part; and

In the above projection lens assembly, a portion of the housing is limited between the operation portion and the connecting portion.

In the projection lens assembly, the driving member has a first thread structure, the moving member has a second thread structure, the first thread structure is screwed with the second thread structure, and the rotating driving member slides relative to the second thread structure through the first thread structure to drive the moving member to move.

In the projection lens assembly, the housing has a receiving groove, and the receiving groove is configured to receive the moving member.

In the above projection lens assembly, the fixed module further includes an elastic member disposed between the housing and the moving member and configured to reversely push the housing and the moving member.

In the above projection lens assembly, the second engaging portion comprises an elastic material.

In the above projection lens assembly, the moving member includes a holding portion, the holding portion is connected to the driving member and holds the second engaging portion, and the hardness of the holding portion is greater than that of the second engaging portion.

In the above projection lens assembly, the first coupling portion protrudes away from the first axis, and the moving member is configured to press against the first coupling portion.

In the projection lens assembly, the moving member has a pressing surface facing the at least one adjusting ring, the pressing surface has a groove, and the groove is configured to press against the first combining portion of the accommodating portion.

The projection lens assembly above, wherein the base comprises:

the shell of the fixed module is fixed on the fixed plate;

a first movable plate movably engaged with the fixed plate to move in a first direction; and

and a second movable plate movably engaged with the first movable plate to move along a second direction, wherein the lens module is engaged with the second movable plate.

In the above projection lens assembly, the first direction is perpendicular to the first axis and the second axis, and the second direction is parallel to the second axis.

In the projection lens assembly, when the moving member is driven by the rotating driving member to move toward the housing, the second engaging portion releases the first engaging portion.

To achieve the above object, the present invention also provides a projector, which includes:

an optical machine module; and

the projection lens assembly as described above, wherein the base is fixed to the opto-mechanical module.

To sum up, in the projection lens assembly and the projector of the present invention, after the adjusting ring is adjusted to the position, the driving member of the fixing module rotates relative to the housing, so that the moving member is pressed against the fixing adjusting ring, thereby effectively solving the problems of the adjusted image dropping and distortion caused by the sudden external force. In addition, because the second combining part of the moving part is made of elastic materials, the second combining part presses the adjusting ring to make up the assembly tolerance of the adjusting ring, and further, a better fixing effect can be achieved. In addition, in the embodiment that the lens module of the projection lens assembly is arranged on the movable plate of the base and can move in two dimensions, the fixing function of the fixing module is not disabled due to the movement of the lens module.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

In order to make the aforementioned and other objects, features, advantages and embodiments of the invention more comprehensible, the accompanying drawings illustrate:

fig. 1 is a partial perspective view illustrating a projector according to some embodiments of the present invention;

fig. 2A is a perspective view of a projection lens assembly according to some embodiments of the present invention;

FIG. 2B is another perspective view of the projection lens assembly of FIG. 2A, wherein the fixing module is exploded upward;

FIG. 3 is a partial cross-sectional view of the projection lens assembly of FIG. 2A along a secant line 3-3;

FIG. 4 is another partial cross-sectional view of the projection lens assembly of FIG. 3;

fig. 5 is a cross-sectional view of the fixing module of fig. 2B along a section line 5-5.

Wherein the reference numerals

100 projector

110 optical-mechanical module

120 projection lens assembly

121: base

121a fixed plate

121b first moving plate

121c second movable plate

121d first knob

121e second knob

122 lens module

122a,122b adjusting ring

122a1,122b1 first binding moiety

123 lens

200 fixing module

210 casing

211a receiving groove

211a of a through hole

212 an extension part

213 guide pin

220 driving member

221 pivoting part

222 operating part

223 joining part

223a first thread structure

230 moving part

231 holding part

231a holding groove

231b second thread Structure

231c guide hole pillar

232 the second joint part

232a pressing surface

232b groove

240 resilient member

A1 first axis

A2 second axis

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, for the sake of simplicity, certain conventional structures and elements are shown in the drawings in a simplified schematic manner, and the same elements in different embodiments are labeled with the same reference numerals.

Please refer to fig. 1, fig. 2A and fig. 2B. Fig. 1 is a partial perspective view of a projector 100 according to some embodiments of the present invention. Fig. 2A is a perspective view of a projection lens assembly 120 according to some embodiments of the present invention. Fig. 2B is another perspective view of the projection lens assembly 120 shown in fig. 2A, wherein the fixing module 200 is exploded upward. As shown in fig. 1 to 2B, the projector 100 includes an optical-mechanical module 110 and a projection lens assembly 120. The projection lens assembly 120 is fixed to the opto-mechanical module 110. The opto-mechanical module 110 includes a housing and optical elements (not shown) disposed inside the housing (such as a light source, a reflector, a lens, a wavelength conversion element, a light equalizer …, etc.).

As shown in fig. 2A and 2B, the projection lens assembly 120 includes a base 121, a lens module 122, and a fixing module 200. The lens module 122 is connected to the base 121 and has two adjusting

rings

122a and 122 b. The two

adjustment rings

122a,122b are aligned along a first axis A1 and are configured to rotate about a first axis A1. Specifically, the adjustment ring 122a is arranged between the base 121 and the adjustment ring 122 b. The lens module 122 may include a plurality of lenses 123 therein. In some embodiments, the size of the projection image can be adjusted by rotating the adjusting ring 122a to move a portion of the lens 123 inside the lens module 122 in a direction parallel to the first axis a 1; by rotating the adjusting ring 122b, the other part of the lens 123 inside the lens module 122 moves in the direction parallel to the first axis a1, so as to adjust the focal length of the projected image.

In some embodiments, the lens module 122 may include only one of the two

adjustment rings

122a and 122 b. For example, the lens module 122 may only include the adjusting ring 122b, and when using the projector 100, a user needs to adjust the position of the projector 100 to project a desired projection image size, and then adjust the focal length of the projection image by rotating the adjusting ring 122 b.

Please refer to fig. 3, fig. 4 and fig. 5. Fig. 3 is a partial cross-sectional view of the projection lens assembly 120 of fig. 2A along a section line 3-3. Fig. 4 is another partial sectional view of the projection lens assembly 120 shown in fig. 3. Fig. 5 is a cross-sectional view of the fixing module 200 of fig. 2B along the section line 5-5. As shown in fig. 3 to 5, the two adjusting

rings

122a and 122b are located at a specific position, and each of the two adjusting rings has a first coupling portion 122a1 and 122b1, the specific position is designated by the user, i.e., the position adjusted to the best focus or the best frame size by the user. The fixing module 200 includes a housing 210, a driving member 220, and a moving member 230. The housing 210 is fixed to the base 121 of the projection lens assembly 120. The driving member 220 is rotatably disposed on the housing 210 and configured to rotate around a second axis a 2. In some embodiments, the second axis a2 is perpendicular to the first axis a 1. The moving member 230 is engaged with the driving member 220 and has a second engaging portion 232. When the moving member 230 is driven by the rotating driving member 220 to move away from the housing 210 to the aforementioned position where the two adjusting

rings

122a and 122b are located, the first engaging portions 122a1 and 122b1 of the two adjusting

rings

122a and 122b engage with the second engaging portion 232 of the moving member 230. When the moving member 230 is driven by the rotating driving member 220 to move toward the housing 210, the second engaging portion 232 releases the first engaging portions 122a1,122b 1.

Based on the above structure configuration, after the two adjusting

rings

122a and 122b are adjusted to be positioned, the driving member 220 of the fixing module 200 is rotated relative to the housing 210, so as to drive the moving member 230 to simultaneously press and fix the two adjusting

rings

122a and 122b, thereby effectively solving the problem of the adjusted image dropping and distortion caused by the sudden external force.

In some embodiments, as shown in fig. 2A, 2B, 3, 4 and 5, the housing 210 of the fixing module 200 includes a receiving groove 211 and an extending portion 212. The receiving cavity 211 is located above the two adjusting

rings

122a and 122 b. The extending portion 212 is located outside the receiving cavity 211 and fixed to the base 121 of the projection lens assembly 120 (e.g., by being fastened with screws). The receiving groove 211 is configured to receive the moving member 230, and can ensure the moving direction and the stroke of the moving member 230 and protect the moving member 230.

In some embodiments, as shown in fig. 3 to 5, the receiving cavity 211 has a through hole 211 a. The driving member 220 rotatably engages the through hole 211 a. Specifically, the driving member 220 includes a pivoting portion 221, an operating portion 222 and a connecting portion 223. The pivot portion 221 is pivotally connected to the through hole 211 a. The operation portion 222 is connected to one end of the pivoting portion 221. The connecting portion 223 is connected to the other end of the pivoting portion 221 and is connected to the moving member 230. The operation portion 222 and the engagement portion 223 are located on opposite sides of the housing 210, respectively. That is, the operation portion 222 is located outside the receiving cavity 211, and the connection portion 223 is located inside the receiving cavity 211. The operation portion 222 may be designed to have a shape similar to a pick, so as to be suitable for a user to rotate.

In some embodiments, as shown in fig. 3, the width of the operation portion 222 and the engaging portion 223 is greater than the width of the through hole 211a, so that a portion of the housing 210 is limited between the operation portion 222 and the engaging portion 223. Thus, the driving member 220 can rotate relative to the housing 210 without disengaging.

In some embodiments, the second coupling portion 232 of the moving member 230 comprises an elastic material and is configured to press against the two adjusting

rings

122a and 122 b. Therefore, the second joint portion can compensate for the assembly tolerance between the two adjusting

rings

122a and 122b, and further achieve a better fixing effect.

In some embodiments, as shown in fig. 5, the moving member 230 includes a holding portion 231. The holding portion 231 is engaged with the driving member 220 and holds the second engaging portion 232. The hardness of the holding part 231 is greater than that of the second coupling part 232. Specifically, the holding portion 231 includes a holding groove 231 a. The second engaging portion 232 is engaged with the holding groove 231 a. In some embodiments, the second combining portion 232 can be further adhered in the holding groove 231 a.

In some embodiments, as shown in fig. 5, the holding portion 231 further includes a via post 231 c. The via post 231c is connected to the bottom of the holding groove 231a in the holding groove 231a and communicates the inner and outer spaces of the holding groove 231 a. The via post 231c penetrates the second combining portion 232 to increase the contact area between the holding portion 231 and the second combining portion 232, so that the holding portion 231 and the second combining portion 232 are better fixed to each other. In addition, the housing 210 of the fixed module 200 further includes a guide pin 213. The guide pin 213 is connected to the bottom of the receiving cavity 211 in the receiving cavity 211 and extends along the second axis a 2. The guiding pin 213 is slidably disposed through the guiding hole 231c to guide the moving member 230 when the moving member 230 is driven by the driving member 220, and prevent the moving member 230 from rotating around the second axis a2 and being unable to ascend and descend.

In some embodiments, as shown in fig. 3-5, the engagement portion 223 of the driving member 220 has a first threaded structure 223 a. The moving member 230 has a second screw structure 231 b. The first thread 223a is threadedly engaged with the second thread 231 b. The rotating driving member 220 drives the moving member 230 to move by sliding the first screw structure 223a relative to the second screw structure 231 b. Thus, when the user rotates the driving member 220 in a rotating direction (e.g., clockwise), the rotating driving member 220 can make the moving member 230 descend along the second axis a2 and press against the two fixed adjustment rings 122a and 122b (as shown in fig. 4); when the user rotates the driving member 220 in another rotational direction (e.g., counterclockwise), the rotated driving member 220 can make the moving member 230 ascend along the second axis a2 and release the two adjusting

rings

122a,122b (as shown in fig. 3).

It should be noted that, in the embodiment shown in fig. 3 to 5, the first thread structure 223a of the driving element 220 is an external thread structure, and the second thread structure 231b of the moving element 230 is an internal thread structure, but the present invention is not limited thereto. In practical applications, the first thread structure 223a of the driving member 220 can be changed to an internal thread structure, and the second thread structure 231b of the moving member 230 can be an external thread structure, so as to achieve the purpose of driving the moving member 230 to ascend and descend by rotating the driving member 220.

In some embodiments, as shown in fig. 5, the fixing module 200 further includes an elastic member 240. The elastic element 240 is disposed between the housing 210 and the moving element 230, and configured to push the housing 210 and the moving element 230 in opposite directions. Thus, the elastic force provided by the elastic element 240 can make the second connecting portion 232 of the moving element 230 tightly press against the two adjusting

rings

122a and 122 b. In some embodiments, the elastic member 240 is a compression spring and is sleeved on the guide pin 213, but the present invention is not limited thereto.

In some embodiments, as shown in fig. 2B-4, the first coupling portions 122a1,122B1 of the two adjustment rings 122a,122B are rib structures protruding away from the first axis a 1. The second coupling portion 232 of the moving member 230 is configured to press against the first coupling portions 122a1,122b 1. In addition, the second coupling portion 232 of the moving element 230 has a pressing surface 232a facing the two

adjustment rings

122a and 122 b. The pressing surface 232a has a groove 232 b. The groove 232b is configured to press against the first coupling portions 122a1,122b1 of the receiving portion. Therefore, the contact area between the second coupling portion 232 and the two

adjustment rings

122a and 122b can be increased, and a better fixing effect can be achieved.

In some embodiments, as shown in fig. 2B, the base 121 includes a fixed plate 121a, a first moving plate 121B, a second moving plate 121c, a first knob 121d, and a second knob 121 e. The housing 210 of the fixed module 200 is fixed to the fixed plate 121 a. The first moving plate 121b movably engages with the fixed plate 121a via the first knob 121d, so that the first moving plate 121b can move along the first direction by rotating the first knob 121 d. The second moving plate 121c movably engages with the first moving plate 121b via the second knob 121e, so that the second moving plate 121c can move along the second direction by rotating the second knob 121 e. The lens module 122 is coupled to the second moving plate 121 c. In other words, the base 121 of the projection lens assembly 120 can move the lens module 122 in two dimensions. In some embodiments, the first direction is perpendicular to the first axis a1 and the second axis a2, and the second direction is parallel to the second axis a2, but the invention is not limited thereto.

In some embodiments, as shown in fig. 2A and 2B, the first knob 121d and the second knob 121e can be designed to have a shape similar to a pick, so as to be suitable for a user to rotate.

In some embodiments, on a reference plane parallel to the first and second directions (as viewed in cross-section in fig. 5), the contour of the groove 232b of the second coupling portion 232 has a smaller curvature (i.e., has a larger radius of curvature), while the outer edges of the first coupling portions 122a1,122b1 of the two

adjustment rings

122a,122b have a larger curvature (i.e., have a smaller radius of curvature). Therefore, even if the lens module 122 moves in two dimensions, the second coupling portion 232 can still properly contact and press against the first coupling portions 122a1 and 122b1, thereby preventing the fixing function of the fixing module 200 from failing.

It should be noted that the combination form between the first combination portions 122a1,122b1 of the two adjusting

rings

122a,122b and the second combination portion 232 of the moving member 230 is not limited to the above pressing form, and may be a combination form such as a buckle … in practical application.

By the above, it can be seen that the projection lens assembly and the projector according to the present invention can effectively solve the problems of the adjusted image loss and distortion caused by the sudden external force after the adjusting ring is adjusted to the fixed position and the moving member is pressed against the fixed adjusting ring by rotating the driving member of the fixed module relative to the housing. In addition, because the second combining part of the moving part is made of elastic materials, the second combining part presses the adjusting ring to make up the assembly tolerance of the adjusting ring, and further, a better fixing effect can be achieved. In addition, in the embodiment that the lens module of the projection lens assembly is arranged on the movable plate of the base and can move in two dimensions, the fixing function of the fixing module is not disabled due to the movement of the lens module.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims

1. A kind of fixed module, set up in a lens module, this lens module has at least one adjusting ring, this at least one adjusting ring locates at a particular position, this at least one adjusting ring has a first conjunction portion, characterized by that, this fixed module includes:

a housing;

2. The fastening module of claim 1, wherein the housing has a bore and the driving member is capable of rotatably engaging the bore.

3. The fastening module of claim 2, wherein the driving member comprises:

a pivot part, which is pivoted to the through hole;

an operating part connected with one end of the pivoting part; and

4. The fixing module of claim 3, wherein a portion of the housing is captured between the operating portion and the engaging portion.

5. The stationary module as claimed in claim 1, wherein the driving member has a first thread structure, the moving member has a second thread structure, the first thread structure is engaged with the second thread structure, and the rotating driving member drives the moving member to move by sliding the first thread structure relative to the second thread structure.

6. The fixing module of claim 1, wherein the housing has a receiving slot configured to receive the moving member.

7. The stationary module of claim 1, further comprising a resilient member disposed between the housing and the movable member and configured to urge the housing and the movable member in opposite directions.

8. The fastening module of claim 1, wherein the second engaging portion comprises an elastic material.

9. The fixing module of claim 8, wherein the moving member includes a holding portion engaging with the driving member and holding the second engaging portion, and the holding portion has a hardness greater than that of the second engaging portion.

10. The fixing module of claim 1, wherein the second engaging portion releases the first engaging portion when the moving member is driven by the rotating driving member to move toward the housing.

11. A projection lens assembly, comprising:

a base;

a stationary module, comprising:

a housing fixed to the base;

12. The projection lens assembly of claim 11, wherein the housing has a through hole and the driving member is capable of rotatably engaging the through hole.

13. The projection lens assembly of claim 12, wherein the driving member comprises:

a pivot part, which is pivoted to the through hole;

an operating part connected with one end of the pivoting part; and

14. The projection lens assembly of claim 13, wherein a portion of the housing is captured between the operating portion and the engagement portion.

15. The projection lens assembly of claim 11, wherein the driving member has a first thread structure, the moving member has a second thread structure, the first thread structure is engaged with the second thread structure, and the driving member being rotated drives the moving member to move by sliding the first thread structure relative to the second thread structure.

16. The projection lens assembly of claim 11, wherein the housing has a receiving groove configured to receive the movable member.

17. The projection lens assembly of claim 11, wherein the fixed module further comprises an elastic member disposed between the housing and the movable member and configured to push the housing and the movable member in opposite directions.

18. The projection lens assembly of claim 11, wherein the second coupling portion comprises an elastic material.

19. The projection lens assembly of claim 18, wherein the moving member comprises a holding portion engaging with the driving member and holding the second engaging portion, and the holding portion has a hardness greater than that of the second engaging portion.

20. The projection lens assembly of claim 11, wherein the first coupling portion protrudes away from the first axis, and the moving member is configured to press against the first coupling portion.

21. The projection lens assembly of claim 20, wherein the moving member has a pressing surface facing the at least one adjustment ring, the pressing surface has a groove, and the groove is configured to press against the first engaging portion of the receiving portion.

22. The projection lens assembly of claim 11, wherein the base comprises:

the shell of the fixed module is fixed on the fixed plate;

23. The projection lens assembly of claim 22, wherein the first direction is perpendicular to the first axis and the second axis, and the second direction is parallel to the second axis.

24. The projection lens assembly of claim 11, wherein the second engaging portion releases the first engaging portion when the moving member is driven by the driving member to move toward the housing.

25. A projector, comprising:

an optical machine module; and

the projection lens assembly of any of claims 11-24, wherein the base is fixed to the opto-mechanical module.