CN108710252B

CN108710252B - Projection device

Info

Publication number: CN108710252B
Application number: CN201810407470.8A
Authority: CN
Inventors: 何文中; 叶新荣
Original assignee: Qisda Optronics Suzhou Co Ltd; Qisda Corp
Current assignee: Qisda Optronics Suzhou Co Ltd; Qisda Corp
Priority date: 2018-05-02
Filing date: 2018-05-02
Publication date: 2020-09-08
Anticipated expiration: 2038-05-02
Also published as: CN108710252A

Abstract

The invention discloses a projection device, which is provided with a projection lens, and comprises: soft dust ring, mounting, movable part and interlock piece. The soft dust ring is provided with a first side end and a second side end which are opposite; the fixing piece is connected with the first side end of the soft dust ring and is provided with a second hole for accommodating part of the soft dust ring; the linkage piece is arranged between the movable piece and the fixed piece and fixedly connected with the movable piece and the second side end of the flexible dust ring; when the projection lens is used, the projection lens is connected with the movable piece, the movable piece drives the projection lens to move to the first target position, and simultaneously drives the second end of the soft dust ring to move to the first deformation position along with the movement of the projection lens, so that the soft dust ring is in the first shape. The projection device of the invention, no matter what position the projection lens is, when the projection lens is removed, the movable piece, the linkage piece and the soft dustproof ring are maintained at the current matched position, thereby being convenient for installing a new projection lens.

Description

Projection device

Technical Field

The present invention relates to a projector, and more particularly, to a projector with a dustproof effect and a projection lens that can be easily replaced.

Background

With the advancement of technology, projectors have generally entered the field of teaching, office automation and some public places. Most of the projectors at present have an electric lens, and a relatively large lens moving range can be ensured in the up-down direction or the left-right direction. However, the large gap of the front cabinet opening not only impairs the appearance but also causes a problem that dust easily enters the projector housing. The existing dustproof technology for moving the lens is to wrap the lens by using a sponge (or a rubber ring) with fixed positions around the lens, so that the sponge and the lens have no gap, and the other end of the sponge and a case are also attached together without gap, so as to block the entrance of external dust. When the lens is replaced, the lens needs to be moved to the central position firstly and then disassembled because the position of the sponge (or the rubber ring) is fixed, so that the use is inconvenient; if the lens is not moved, the sponge (or rubber ring) may interfere with the projection lens when the lens is reinstalled.

Disclosure of Invention

The invention aims to provide a projection device, which is convenient for a user to replace a projection lens and can ensure the dustproof effect of the projection device.

In order to achieve the above object, the present invention provides a projection apparatus having a projection lens, the projection apparatus comprising:

the flexible dust ring is provided with a first hole and a second hole, and the flexible dust ring is provided with a first side end and a second side end which are opposite;

the fixing piece is connected with the first side end of the soft dustproof ring and is provided with a second hole for accommodating part of the soft dustproof ring;

a movable member having a third hole; and

the linkage piece is provided with a fourth hole for the projection lens to pass through and abut against the outer edge of the projection lens, is arranged between the movable piece and the fixed piece and is fixedly connected with the movable piece and the second side end of the soft dustproof ring;

when the projection lens is used, the projection lens penetrates through the first hole, the third hole and the fourth hole and is connected with the movable piece, at the moment, the second side end of the soft dust ring is adjacent to the projection lens, the first side end is far away from the projection lens compared with the second side end, the movable piece drives the projection lens to move to a first target position, and meanwhile, the movable piece drives the second end of the soft dust ring to move to a first deformation position along with the movement of the projection lens through the linkage piece, so that the soft dust ring is in a first shape.

As an optional technical solution, when the projection lens is moved to the first target position and needs to be replaced with a new projection lens, the projection lens is directly removed from the first target position, and at this time, the flexible dust ring maintains the first shape.

As an optional technical solution, the flexible dust ring has a plurality of folds between the first side end and the second side end, the plurality of folds are beneficial to deformation of the flexible dust ring, when the movable element drives the projection lens to move to a second target position, and simultaneously the movable element drives the second end of the flexible dust ring to move to a second deformation position along with the movement of the projection lens through the linkage element, so that the flexible dust ring is in a second form, the second target position is different from the first target position, and the second form is different from the first form.

As an optional technical solution, the movable member has a first middle area and a first edge area, the first edge area is located at the periphery of the first middle area, the first middle area has the third hole, and the linking member is fixedly connected with the movable member at the first edge area.

As an optional technical solution, the linkage member has a first element and a second element connected to each other, the first element has a third end and a fourth end, the third end is connected to the movable member, and the fourth end is connected to the second element.

As an optional technical solution, the second element has a second middle area and a second edge area, the second edge area is located at a periphery of the second middle area, the second middle area has the fourth hole, and the fourth end of the first element is connected to the second element at the second edge area.

As an optional technical solution, the projection apparatus further includes a first moisture-proof ring, the second element has a first annular positioning groove around the fourth hole, the first moisture-proof ring is disposed in the first annular positioning groove, and at least a portion of the first moisture-proof ring is exposed out of the first annular positioning groove.

As an optional technical solution, the fixing member has a second annular positioning portion surrounding the second hole, the first side end of the flexible dust ring has a second annular positioning groove, and the second annular positioning portion is in positioning connection with the second annular positioning groove in a matching manner.

As an optional technical solution, the second element further has a third annular positioning groove surrounding the fourth hole, the third annular positioning groove is adjacent to the first annular positioning groove, the second side end of the flexible dust ring has a third annular positioning portion, and the third annular positioning portion is located in the third annular positioning groove.

As an optional technical solution, the opening of the first annular positioning groove faces the fourth hole, and the opening of the third annular positioning groove faces away from the fourth hole.

The first side end of the flexible dustproof ring of the projection device is fixedly connected with the fixing piece, and the second side end of the flexible dustproof ring is connected with the linkage piece. After the projection lens is assembled, a user adjusts the position of the projection lens by means of the movable piece according to actual needs, and in the process, the second side ends of the linkage piece and the soft dust ring move along with the movement of the projection lens, so that the movable piece, the linkage piece and the soft dust ring are located at matched positions; when the projection lens is directly replaced from the current position, the movable piece, the linkage piece and the soft dust ring can be maintained at the current position, namely, the movable piece, the linkage piece and the soft dust ring are maintained in a mutually matched state, so that no matter what position the projection lens is located, when the projection lens is removed, the movable piece, the linkage piece and the soft dust ring are maintained at the current matched position, and the installation of a new projection lens is facilitated.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a partial cross-sectional view of a projection device of the present invention;

FIG. 2 is a partial perspective view of a projection apparatus according to the present invention;

fig. 3 is a partial perspective cross-sectional view of a projection apparatus according to the present invention.

Detailed Description

The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "side", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.

In the following embodiments, the same portions are denoted by the same reference numerals in different drawings.

Referring to fig. 1 to 3, fig. 1 is a partial cross-sectional view of a projection apparatus according to the present invention; FIG. 2 is a partial perspective view of a projection apparatus according to the present invention; fig. 3 is a partial perspective cross-sectional view of a projection apparatus according to the present invention. The projection apparatus 1000 of the present invention has a projection lens 2000. Specifically, the projection apparatus 1000 includes a flexible dust ring 100, a fixing element 200, a movable element 300 and a linkage element 400. The flexible dust ring 100 has a first hole 101 for the projection lens 2000 to pass through. The flexible dust ring 100 has a first side 110 and a second side 120 opposite to each other. As shown in fig. 1, the flexible dust ring 100 is a single-layer flexible film ring, and it is assumed that the front view of the flexible dust ring 100 is a circular ring having a first center O1 (the first center can also be regarded as the center of the first hole 101), the first side 110 is located on a first circumference C1 with the first center O1 as the center, the second side 120 is located on a second circumference C2 with the first center O1 as the center, and the first circumference C1 is located on the periphery of the second circumference C2, i.e. the first side 110 is farther from the center of the first hole 101 than the second side 120.

As shown in fig. 1, the fixing member 200 is connected to the first side end 110 of the flexible dust ring 100, and the fixing member 200 has a second hole 201 for receiving a portion of the flexible dust ring 100. In practice, the fixture 200 may also be used to secure other elements, such as a DMDHSG. The movable member 300 has a third hole 301, the linkage member 400 has a fourth hole 401 for the projection lens 2000 to pass through and abut against the outer edge of the projection lens 2000, the linkage member 400 is disposed between the movable member 300 and the fixed member 200, and the linkage member 400 is fixedly connected to the movable member 300 and the second side 120 of the flexible dust ring 100.

In use, the projection lens 2000 passes through the first hole 101, the third hole 301 and the fourth hole 401 and is connected to the movable element 300. At this time, the second side end 120 of the flexible dust ring 100 is adjacent to the projection lens 2000 and the first side end 110 is far from the projection lens 2000 than the second side end 120, the movable member 300 drives the projection lens 2000 to move to the first target position, and simultaneously the movable member 300 drives the second side end 120 of the flexible dust ring 100 to move to the first deformation position along with the movement of the projection lens 2000 through the linkage member 400, so that the flexible dust ring 100 is in the first shape. It should be noted that, for convenience of description, only some elements are shown in fig. 2.

In practical applications, the movable element 300 may have a first driving element and a second driving element, for example, the first driving element may drive the projection lens 2000 to move in the up-down direction, and the second driving element may drive the projection lens 2000 to move in the left-right direction, so that the projection lens 2000 may be displaced in at least two dimensions to reach the target position. For example, assuming that the projection lens 2000 is assembled at the beginning, the projection of the center of the fourth hole 401 of the linking member 400 on the fixed member 200 coincides with the center of the second hole 201 of the fixed member 200, i.e. the projection of the fourth hole 401 and the projection of the second hole 201 are concentric when viewed from the direction in which the fixed member 200 points to the movable member 300. In this embodiment, the flexible dust ring 100 can be regarded as a circular ring structure symmetrical in all directions. As shown in fig. 1, a distance between the first side end 110 and the second side end 120 of the flexible dust ring 100 above the fourth hole 401 in the vertical direction is defined as a first distance, and a distance between the first side end 110 and the second side end 120 of the flexible dust ring 100 below the fourth hole 401 in the vertical direction is defined as a second distance, when the projection lens 2000 is assembled at the beginning, and a projection of a circle center of the fourth hole 401 on the fixing member 200 coincides with a circle center of the second hole 201, the first distance is equal to the second distance. Then, the user makes the movable element 300 drive the projection lens 2000 to move (in this embodiment, the projection lens 2000 only moves in the up-down direction, for example) to reach the first target position according to the actual requirement, at this time, the movable element 300 drives the second side end 120 of the flexible dust ring 100 to move to the first deformation position along with the movement of the projection lens 1000 through the linkage element 400, the projection of the center of the fourth hole 401 on the fixed element 200 is no longer overlapped with the center of the second hole 201, so that the first distance is no longer equal to the second distance, and the flexible dust ring 100 is in the first shape.

In the present invention, when the projection lens 2000 is moved to the first target position and a new projection lens needs to be replaced, the current projection lens 2000 is directly removed from the first target position, and the flexible dust ring 100 maintains the currently presented first form. Specifically, after the projection lens 2000 reaches the first target position, the movable element 300 does not push the projection lens 2000 and maintains the current position, so that the movable element 300, the linking element 400 and the soft dust ring 100 are located at the matching positions, and the projection lens 2000 can be fixed at the first target position. At this time, when the projection lens 2000 is directly removed from the first target position, since the movable member 300 is maintained at the current position, the linkage member 400 connected thereto is also maintained at the current position, so that the second side end 120 of the soft dust ring 100 connected to the linkage member 400 is maintained at the current position, and the first side end 110 of the soft dust ring 100 is fixedly connected to the fixed member 200, so that the first side end 110 is also maintained at the current position, so that the soft dust ring 100 can be maintained in the first form currently presented, and thus, although the projection lens 2000 is removed, the movable member 300, the linkage member 400 and the soft dust ring 100 are maintained at the mutually matched positions, when a new projection lens needs to be installed, the projection lens only needs to pass through the first hole 101, the third hole 301 and the fourth hole 401 and be connected to the movable member 300, so that the replaced projection lens can be located at the first target position, then, the user can adjust the position of the replaced projection lens according to actual needs.

The first side end of the flexible dustproof ring of the projection device is fixedly connected with the fixing piece, and the second side end of the flexible dustproof ring is connected with the linkage piece. After the projection lens is assembled, a user adjusts the position of the projection lens by means of the movable piece according to actual needs, and in the process, the second side ends of the linkage piece and the soft dust ring move along with the movement of the projection lens, so that the movable piece, the linkage piece and the soft dust ring are located at matched positions; when the projection lens is directly replaced from the current position, the movable part, the linkage part and the soft dust ring can all maintain the current position, so that the movable part, the linkage part and the soft dust ring are maintained in a mutually matched state, the assembly of a new projection lens is facilitated, the situation that the soft dust ring returns to the initial position when the projection lens is removed, and the situation of mutual interference with the soft dust ring is caused when the new projection lens is installed is avoided. The projection device of the invention, no matter what position the projection lens is, when the projection lens is removed, the movable piece, the linkage piece and the soft dustproof ring are maintained at the matched positions, thereby being convenient for the installation of a new projection lens. In practice, to further ensure that the linkage 400 maintains the current position, the linkage 400 may be made of a rigid material.

As shown in fig. 1, the flexible dust ring 100 may be a single-layer flexible film ring that is folded such that the first side end 110 is located outside the folded portion and the second side end 120 is located inside the folded portion. Taking the first side end 110 and the second side end 120 above the first hole 101 as an example, when the first distance is smaller, the turning range of the flexible dust ring 100 is larger; when the first distance is larger, it is described that the folding width of the flexible dust ring 100 is smaller and the unfolding width is larger.

As shown in fig. 1, the flexible dust ring 100 has a plurality of folds between the first side end 110 and the second side end 120, and the plurality of folds facilitate the flexible dust ring 100 to deform so that the flexible dust ring 100 can assume a plurality of forms, i.e., the second side end 120 can be located at a plurality of positions relative to the first side end 110. For example, when the movable element 300 drives the projection lens 2000 to move to the second target position, and the movable element 300 drives the second end 120 of the flexible dust ring 100 to move to the second deformation position along with the movement of the projection lens 2000 through the linkage element 400, the flexible dust ring 100 is in the second shape, the second target position is different from the first target position, and the second shape is different from the first shape. In practice, the size of the second hole 201 of the fixing member 200 is larger than that of the first hole 101, so as to accommodate a portion of the flexible dust ring 100 therein and facilitate the movement of the second side 120.

As shown in fig. 1, the movable element 300 has a first middle region and a first edge region, the first edge region is located at the periphery of the first middle region, the first middle region has the third hole 301, and the linking element 400 is fixedly connected to the movable element 300 at the first edge region.

As shown in fig. 1, the linkage 400 has a first element 410 and a second element 420 connected to each other, the first element 410 has a third end 411 and a fourth end 412, the third end 411 is connected to the movable element 300, and the fourth end 412 is connected to the second element 420. The second element 420 has a second middle region and a second edge region, the second edge region is located at the periphery of the first middle region, the second middle region has the fourth hole 401, and the fourth end 412 of the first element 410 is connected to the second element 420 at the second edge region.

As shown in fig. 1, when the projection lens 2000 is assembled, the linking member 400 (specifically, the second element 420) abuts against the outer edge of the projection lens 2000, the first side end 110 of the flexible dust ring 100 is fixed on the fixing member 200, and the second side end 120 is fixed on the linking member 400, so that with such a design, dust cannot enter from the gap between the projection lens 2000 and the fixing member 200 to affect the use of other elements (e.g., DMD).

In practical operation, since the linking member 400 is made of a rigid material and the outer edge of the projection lens 2000 is also made of a rigid material, the two cannot be completely abutted due to the process error, and in order to further improve the dust-proof effect and provide a certain moisture-proof function, as shown in fig. 1, the projection apparatus 1000 further includes a first moisture-proof ring 500, the second member 420 has a first annular positioning groove 402 surrounding the fourth hole 401, the first moisture-proof ring 500 is disposed in the first annular positioning groove 402, and at least a portion of the first moisture-proof ring 500 is exposed out of the first annular positioning groove 402. When the projection lens 2000 is assembled, the first damp-proof ring 500 tightly abuts against the outer edge of the projection lens 2000. Generally, the first moisture-proof ring 500 may be made of a soft material (e.g., rubber), so that when the outer edge of the projection lens 2000 is engaged, the first moisture-proof ring 500 can be tightly abutted against the outer edge of the projection lens 2000 by its own deformation characteristic, thereby preventing dust and even water vapor from entering. In practical operation, the height of the first moisture-proof ring 500 exposed out of the first annular positioning groove 402 can be determined as required to control the deformation amplitude of the first moisture-proof ring 500, so that the projection lens 2000 can smoothly pass through the fourth hole 401 during the installation process of the projection lens 2000, and the first moisture-proof ring 500 can tightly abut against the outer edge of the projection lens 2000 after the installation of the projection lens 2000 is completed.

As shown in fig. 1, the fixing member 200 has a second annular positioning portion 202 surrounding the second hole 201, the first side end 110 of the flexible dust ring 100 has a second annular positioning groove 102, and the second annular positioning portion 202 is in positioning connection with the second annular positioning groove 102. In practical applications, an adhesive may be disposed in the first annular positioning groove 112 and/or on the surface of the first annular positioning portion 202 to ensure a stable connection between the two positioning portions.

As shown in fig. 1, the second element 420 further has a third annular positioning groove 403 surrounding the fourth hole 401, the third annular positioning groove 403 is adjacent to the first annular positioning groove 402, the second side end 120 of the flexible dust ring 100 has a third annular positioning portion 103, and the third annular positioning portion 403 is located in the third annular positioning groove 103. In this embodiment, the opening of the first annular positioning groove 402 faces the fourth hole 401, and the opening of the third annular positioning groove 403 faces away from the fourth hole 401.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A projection device having a projection lens, the projection device comprising:

a movable member having a third hole; and

when the projection lens is used, the projection lens penetrates through the first hole, the third hole and the fourth hole and is connected with the movable piece, at the moment, the second side end of the soft dust ring is adjacent to the projection lens, the first side end is far away from the projection lens compared with the second side end, the movable piece drives the projection lens to move to a first target position, and meanwhile, the movable piece drives the second side end of the soft dust ring to move to a first deformation position along with the movement of the projection lens through the linkage piece, so that the soft dust ring is in a first shape.

2. A projection device according to claim 1, wherein: when the projection lens is moved to the first target position, a new projection lens is required to be replaced, the projection lens is directly removed from the first target position, and the flexible dustproof ring maintains the first shape.

3. A projection device according to claim 1, wherein: the flexible dustproof ring is provided with a plurality of folds between the first side end and the second side end, the plurality of folds are beneficial to deformation of the flexible dustproof ring, when the movable piece drives the projection lens to move to a second target position, the movable piece drives the second side end of the flexible dustproof ring to move to a second deformation position along with the movement of the projection lens through the linkage piece, so that the flexible dustproof ring is in a second form, the second target position is different from the first target position, and the second form is different from the first form.

4. A projection device according to claim 1, wherein: the movable piece is provided with a first middle area and a first edge area, the first edge area is positioned on the periphery of the first middle area, the first middle area is provided with the third hole, and the linkage piece is fixedly connected with the movable piece in the first edge area.

5. The projection device of claim 4, wherein: the linkage piece is provided with a first element and a second element which are connected, the first element is provided with a third end and a fourth end, the third end is connected with the movable piece, and the fourth end is connected with the second element.

6. A projection device according to claim 5, wherein: the second element has a second middle region and a second edge region, the second edge region is located at the periphery of the second middle region, the second middle region has the fourth hole, and the fourth end of the first element is connected with the second element at the second edge region.

7. The projection device of claim 6, wherein: the projection device further comprises a first damp-proof ring, the second element is provided with a first annular positioning groove around the fourth hole, the first damp-proof ring is arranged in the first annular positioning groove, at least part of the first damp-proof ring is exposed out of the first annular positioning groove, and when the projection lens is assembled, the first damp-proof ring tightly abuts against the outer edge of the projection lens.

8. A projection device according to claim 1, wherein: the fixing piece is provided with a second annular positioning part around the second hole, the first side end of the flexible dustproof ring is provided with a second annular positioning groove, and the second annular positioning part is matched, positioned and connected with the second annular positioning groove.

9. A projection device according to claim 7, wherein: the second element also has a third annular positioning groove surrounding the fourth hole, the third annular positioning groove is adjacent to the first annular positioning groove, the second side end of the flexible dustproof ring has a third annular positioning part, and the third annular positioning part is positioned in the third annular positioning groove.

10. A projection device according to claim 9, wherein: the opening of the first annular positioning groove faces the fourth hole, and the opening of the third annular positioning groove faces away from the fourth hole.