Lens adjusting module and projection device

Abstract

The invention provides a lens adjusting module and a projection device, and the lens adjusting module comprises a base which is provided with a first slide hole and a second slide hole at the adjacent first and second edges; the supporting piece comprises a first side and a second side which are adjacent, a hollow area is arranged in the middle of the supporting piece, a first sliding groove is formed in the first side in the first direction and comprises a first long and narrow hole extending in the first direction, and a second sliding groove extending in the second direction is formed in the part, surrounded by the first side, the second side and the hollow area, of the supporting piece. The second sliding groove comprises a second long and narrow hole extending in the second direction. The first positioning piece and the second positioning piece are respectively accommodated in the first sliding groove and the second sliding groove; the first shaft piece is fixedly connected with the first positioning piece and penetrates through the first long and narrow hole, and one end of the first shaft piece is slidably inserted into the first sliding hole in the second direction; the second shaft piece is fixedly connected with the second positioning piece and penetrates through the second long and narrow hole, and one end of the second shaft piece is inserted into the second sliding hole in the first direction in a sliding mode.

Description

Technical Field

[0001] The present invention relates to the field of projection devices, and in particular to a lens adjustment module and a projection device having the lens adjustment module. Background Art

[0002] After the projector is powered on, the projector can project an image onto the screen through its projection lens. However, in actual use, correctly projecting an image onto the screen usually requires adjusting the position of the image on the screen (e.g., adjusting the position of the projection lens) and the projection focal length.

[0003] At present, the adjustment mechanism of the projector lens position is complex and large in size, which will occupy a considerable space inside the projector. For example, Chinese patent TW201411270A proposes a lens moving mechanism, such as Figure 1 As shown, it includes a projection lens fixing member 152, and two sliding members 144 and 148 connected to the projection lens fixing member 152 in sequence. The two sliding members 144 and 148 are used to realize the overall position adjustment function of the projection lens. The movement range of the above-mentioned lens fixing member 152 together with the lens cannot be stably limited. If the movement range is too large, it may exceed the bearing range of the mechanical structure of the projector, resulting in damage to internal parts. In addition, the height dimension of the above-mentioned second sliding member 148 is greater than the height dimension of the projection lens fixing member 152, and the overall dimension of the first sliding member 144 is much larger than the lens fixing member 152, thereby greatly increasing the overall height dimension of the lens module, which is not conducive to the miniaturization and thinning development of the projector.

[0004] Therefore, it is necessary to design a novel lens adjustment module to improve the above defects. Summary of the invention

[0005] The object of the present invention is to provide a lens adjustment module and a projection device, which have a compact structure, can fully utilize the space on the support member, effectively reduce the height of the support member, and are conducive to further miniaturization of the lens adjustment module and the projection device.

[0006] To achieve the above object, the present invention provides a lens adjustment module and a projection device, wherein the lens adjustment module comprises:

[0007] A base having a first side and a second side adjacent to each other, the first side having a first sliding hole, and the second side having a second sliding hole;

[0008] A support member, comprising a first side and a second side adjacent to each other, a hollow area being provided in the middle of the support member to accommodate a lens; a first sliding groove extending along a first direction is provided on the first side, the first sliding groove comprising a first slit hole extending along the first direction; a second sliding groove extending along a second direction is provided on a portion of the support member surrounded by the first side, the second side and the hollow area, and the second sliding groove comprises a second slit hole extending along the second direction;

[0009] A first positioning member and a second positioning member are slidably accommodated in the first sliding groove and the second sliding groove respectively;

[0010] A first shaft member is fixedly connected to the first positioning member, is passed through the first slit hole, and one end of the first shaft member is inserted into the first sliding hole in a sliding manner along the second direction; and

[0011] A second shaft member is fixedly connected to the second positioning member and is inserted into the second slit hole, and one end of the second shaft member is inserted into the second sliding hole in a sliding manner along the first direction;

[0012] Among them, the first positioning member and / or the first shaft member also cooperate with the first sliding groove to limit the moving range of the support member along the first direction, and the second positioning member and / or the second shaft member also cooperate with the second sliding groove to limit the moving range of the support member along the second direction.

[0013] Preferably, one of the base and the support member is provided with a limiting groove, and the other of the two is provided with a convex column, and the convex column is inserted into the limiting groove.

[0014] Preferably, the limiting groove cooperates with the protruding column to limit the movement range of the supporting member relative to the base in the plane formed by the first direction and the second direction; wherein the limiting groove is a columnar groove with an octagonal bottom surface.

[0015] Preferably, the hollow area is circular to match the lens.

[0016] Preferably, the support member further comprises a third side and a fourth side adjacent to each other, the third side being opposite to the first side; wherein the third side is provided with a third sliding groove;

[0017] The lens adjustment module also includes:

[0018] a third positioning member, slidably received in the third sliding groove along a first direction and having a first screw hole; and

[0019] The first screw rod is arranged along the second direction, is rotatably connected to the base, and is threadedly connected to the first screw hole, so that the end of the first screw rod drives the support member to move along the second direction.

[0020] Preferably, a fourth sliding groove is provided on the fourth side of the support member;

[0021] The lens adjustment module also includes:

[0022] a fourth positioning member, slidably received in the fourth sliding groove along the second direction and having a second screw hole; and

[0023] The second screw rod is arranged along the first direction, is rotatably connected to the base, and is threadedly connected to the second screw hole, so that the end of the second screw rod drives the support member to move along the first direction.

[0024] Preferably, it further includes a fifth sliding groove, the structure of which is the same as that of the second sliding groove, and the fifth sliding groove is arranged at the corner portion of the support member surrounded by the second side, the third side and the hollow area.

[0025] Preferably, the lens adjustment module further includes:

[0026] The first operating member and the second operating member are respectively fixedly connected to the first screw rod and the second screw rod and exposed from the base.

[0027] Preferably, the first direction is perpendicular to the second direction.

[0028] Preferably, a projection device comprises:

[0029] Lenses, and

[0030] The lens adjustment module.

[0031] Compared with the prior art, the lens adjustment module provided by the present invention has a hollow area for accommodating the lens in the middle of the support, and a first sliding groove and a corresponding first positioning member are arranged on the first side of the support, and a second sliding groove and a corresponding second positioning member are arranged on the corner portion of the support surrounded by the first and second sides adjacent to the support and the hollow area, so as to achieve stable positioning of the lens position in the first direction or the second direction. The space on the support is fully utilized, the structure is compact, and the size of the support and the lens adjustment module as a whole is reduced, which is conducive to the miniaturization and thinning of the projector as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a lens moving mechanism in the prior art;

[0033] Figure 2 This is a schematic diagram of the overall structure of a lens adjustment module according to an embodiment of the present invention;

[0034] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the lens adjustment module;

[0035] Figure 4 for Figure 2 A schematic diagram of a partial explosion structure of a lens adjustment module;

[0036] Figure 5 It is a structural schematic diagram of a support member according to an embodiment of the present invention;

[0037] Figure 6 It is a schematic structural diagram of a base according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0039] Certain words are used in the specification and claims to refer to specific components. Those with ordinary knowledge in the field should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but rather use differences in components' functions as the criteria for distinction. The term "including" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to".

[0040] The present invention provides a projection device (not shown), the projection device includes a lens and a lens adjustment module, the lens is arranged on a support member 1 of the lens adjustment module, and the lens adjustment module is used to adjust the position of the lens. When the projection device is installed or placed, for example, placed on a desktop or mounted on a wall, the position of the lens can be adjusted by the lens adjustment module so that the projected image is located at the target projection position.

[0041] See also Figure 2-Figure 6 , Figure 2 is a schematic diagram of the overall structure of a lens adjustment module proposed in an embodiment of the present invention, Figure 3 for Figure 2 The exploded structure diagram of the lens adjustment module in the figure. Figure 4 for Figure 2 A partial exploded structural diagram of the lens adjustment module in FIG. Figure 5 is a schematic structural diagram of a support member according to an embodiment of the present invention, Figure 6 It is a schematic structural diagram of a base according to an embodiment of the present invention.

[0042] Reference Figure 2 and Figure 3As shown, the lens adjustment module comprises a support member 1, a base 2, a first positioning member 31 and a second positioning member 32, a first shaft member 41 and a second shaft member 42. The base 2 has a first side and a second side adjacent to each other, the first side is provided with a first sliding hole 21, and the second side is provided with a second sliding hole 22. A hollow area 10 is provided in the middle of the support member 1 for accommodating the lens, and the hollow area 10 is circular and compatible with the lens. The support member 1 has a first side 11 and a second side 12 adjacent to each other, the first side 11 is provided with a first sliding groove 13 extending along a first direction D1, the first sliding groove 13 is provided with a first slit hole a extending along the first direction D1, the corner portion of the support member 1 surrounded by the first side 11, the second side 12 and the hollow area 10 is provided with a second sliding groove 14 extending along the second direction D2, and the second sliding groove 14 is provided with a second slit hole b extending along the second direction D2.

[0043] Recombination Figures 3 to 5 As shown, the first positioning member 31 is slidably accommodated in the first sliding groove 13, and the first sliding groove 13 is slidably adapted to the first positioning member 31 along the first direction D1. The second positioning member 32 is slidably accommodated in the second sliding groove 14, and the second sliding groove 14 is slidably adapted to the second positioning member 32 along the second direction D2.

[0044] like Figure 4 As shown, the first shaft member 41 extends along the second direction D2, the first shaft member 41 is fixedly connected to the first positioning member 31, the first shaft member 41 is fixedly connected to the first positioning member 31 and penetrates the first slit a of the first sliding groove 13, and one end of the first shaft member 41 is slidably inserted in the first sliding hole 21 along the second direction D2. The second shaft member 42 extends along the first direction D1, the second shaft member 42 is fixedly connected to the second positioning member 32 and penetrates the second slit b of the second sliding groove 14, and one end of the second shaft member 42 is slidably inserted in the second sliding hole 22 along the first direction D1. Preferably, one end of the first shaft member 41 is slidably penetrated in the first sliding hole 21 on the base 2, and the other end is connected to the first positioning member 31. The second shaft member 42 extends along the first direction D1, one end of the second shaft member 42 is slidably penetrated in the second sliding hole 22 on the base 2, and the other end is connected to the second positioning member 32, so that the structure is more compact, which is conducive to the miniaturization of the lens adjustment module.

[0045] Specifically, when the first shaft member 41 moves along the second direction D2, the first shaft member 41 drives the first positioning member 31 to move in the second direction D2, and the first positioning member 31 drives the support member 1 together with the lens to move in the second direction D2. At this time, the second sliding groove 14 on the above-mentioned support member 1 moves smoothly in the second direction D2 relative to the second positioning member 32, and the second positioning member 32 and the second shaft member 42 will not follow the movement and are used to stop the movement of the second sliding groove 14 along the second direction D2 (that is, the second positioning member 32 is used to stop the surface S4 or surface S4' of the second sliding groove 14 in the second direction D2), thereby limiting the movement distance of the support member 1 together with the lens in the second direction D2. It can be seen that the above-mentioned second positioning member 32 and / or the second shaft member 42 cooperate with the second sliding groove 14 to limit the movement range of the support member 1 along the second direction D1.

[0046] Further, when the second shaft member 42 moves along the first direction D1, the second shaft member 42 drives the second positioning member 32 to move in the first direction D1, and the second positioning member 32 drives the support member 1 together with the lens to move in the first direction D1. At this time, the first sliding groove 13 on the support member 1 moves smoothly relative to the first positioning member 31 in the first direction D1, and the first positioning member 31 will not follow the movement and is used to stop the movement of the first sliding groove 13 along the first direction D1 (that is, the first positioning member 31 stops the surface S2 or surface S2' of the first sliding groove 13 in the first direction D1), thereby limiting the moving distance of the support member 1 together with the lens in the first direction D1. It can be seen that the first positioning member 31 and / or the first shaft member 41 can cooperate with the first sliding groove 13 to limit the moving range of the support member 1 along the first direction D1. In this way, it is effectively avoided that the movement range of the support member 1 is too large and exceeds the bearing range of the mechanical structure of the lens adjustment module, causing damage to the internal parts.

[0047] The second direction D2 is different from the first direction D1. In a preferred embodiment, the first direction D1 is perpendicular to the second direction D2.

[0048] The embodiment of the present invention can fully utilize the space on the support member 1 to make the structure compact by providing a first sliding groove 13 and a corresponding first positioning member 31 on the first side 11 of the support member 1, and providing a second sliding groove 14 and a corresponding second positioning member 32 on the corner portion of the support member 1 surrounded by the first side 11, the second side 12 and the hollow area adjacent to the support member 1. The embodiment of the present invention can further reduce the overall size of the support member 1 and the lens module, avoid a significant increase in the overall height of the projection device, and facilitate further miniaturization of the projection device.

[0049] In some other embodiments, the first positioning member 31 contacts the inner surfaces S1 and S1' opposite to each other of the first sliding groove 13 along the second direction D2, and the second positioning member 32 contacts the inner surfaces S3 and S3' opposite to each other of the second sliding groove 14 along the first direction D1. In this way, the support member 1 together with the lens can respond immediately when the first positioning member 31 or the second positioning member 32 moves, generating displacement in the corresponding direction with stable movement, avoiding empty travel, and further improving the user experience. However, the present invention is not limited to this.

[0050] In one embodiment, one of the base 2 and the support member 1 is provided with a limiting groove 24, and the other is provided with a protrusion 17, and the protrusion 17 is inserted into the limiting groove. Figure 6 As shown, the base 2 has a receiving space 20, and the support member 1 is located in the receiving space 20. A limiting groove 24 is provided on the base 2, and the limiting groove 24 is a columnar groove with an octagonal bottom surface; a convex column structure 17 is provided on the support member 1. When the support member 1 moves in the first direction D1 or the second direction D2, the limiting groove 24 is used to stop the convex column structure 17 to further limit the movement range of the support member 1 together with the lens relative to the base 2 in the plane formed by the first direction D1 and the second direction D2, so that the adjustment of the support member 1 together with the lens is more stable and reliable. The specific dimensions of the limiting groove 24 and the convex column 17 can be designed as needed, and the embodiment of the present invention is not limited thereto. In addition, the base 2 also has a hollow area 23, which is connected to the receiving space 20, and the hollow area 23 corresponds to the hollow area 10 on the support member 1, and the axis of the hollow area 23 coincides with the optical axis of the lens.

[0051] In one embodiment, referring to Figure 5 As shown, the hollow area 10 on the support member 1 is circular and matches the lens, so as to make full use of the space on the support member 1. In some other embodiments, along the first direction D1, the side of the hollow area 10 close to the first side 11 has a first tangent line, and along the second direction D2, the side of the hollow area 10 close to the second side 12 has a second tangent line, and the second sliding groove 14 is located in the area defined by the first tangent line and the second tangent line on the support member 1. In this way, the space on the support member 1 is further fully utilized, the structure is made more compact, the size of the support member 1 can be further reduced, and the height of the entire projection device can be reduced, but the present invention is not limited thereto.

[0052] In one embodiment, combined with Figure 3 , Figure 4 and Figure 5The support member 1 shown above also includes an adjacent third side 11' and a fourth side 12', wherein the third side 11' is opposite to the first side 11, and the second side 12 is opposite to the fourth side 12'. The third side 11' is provided with a third sliding groove 15 along the first direction D1, and the third sliding groove 15 is provided opposite to the first sliding groove 13. A third positioning member 33 is provided in the third sliding groove 15, and the matching relationship between the third sliding groove 15 and the third positioning member 33 is the same as the matching relationship between the first sliding groove 13 and the first positioning member 31, which will not be repeated here. In addition, the third positioning member 33 has a first screw hole, and the lens adjustment module also includes a first screw rod 43, which is provided along the second direction D2, and the first screw rod 43 is rotatably connected to the base 2, and is threadedly connected to the first screw hole, and the first screw rod 43 can drive the support member 1 to move along the second direction D2 with its end. Specifically, when the first screw 43 rotates around the second direction D2, the first screw 43 drives the third positioning member 33 to move along the second direction D2, thereby causing the first shaft member 41 and the base 2 to move along the second direction D2.

[0053] Further, the fourth side 12' of the support member 1 is provided with a fourth sliding groove 16 along the second direction D2, a fourth positioning member 34 is disposed in the fourth sliding groove 16, and the matching relationship between the fourth sliding groove 16 and the fourth positioning member 34 is the same as the matching relationship between the second sliding groove 14 and the second positioning member 32, which will not be repeated here. In addition, the fourth positioning member 34 has a second screw hole. The lens adjustment module also includes a second screw rod 44, which is arranged along the first direction D1, the second screw rod 44 is rotatably connected to the base 2, and is threadedly connected to the second screw hole, and the first screw rod 43 can drive the support member 1 to move along the first direction D1 with its end. Specifically, when the second screw rod 44 rotates around the first direction D1, the second screw rod 44 drives the fourth positioning member 34 to move along the first direction D1, thereby causing the second shaft member 42 to move along the first direction D1 together with the base 2.

[0054] In one embodiment, combined with Figure 4 , Figure 5 and Figure 6As shown, the fifth sliding groove 14' is also included. The structure of the fifth sliding groove 14' is the same as that of the second sliding groove 14, and is symmetrically arranged with the second sliding groove 14. The fifth sliding groove 14' is arranged on the other corner portion of the support member 1 surrounded by the second side 12, the third side 11' and the hollow area 10. In addition, the second sliding groove 14 contains a fifth positioning member 32', and the base 2 is correspondingly provided with a third sliding hole 22'; the structure and matching relationship of the second sliding groove 14, the fifth positioning member 32' and the third sliding hole 22' are consistent with the structure and matching relationship of the second sliding groove 14, the second positioning member 32 and the second sliding hole 22', and will not be repeated here. In this way, the movement of the support member 1 together with the lens is more stable, and the structure can be made compact and the size of the support member 1 can be effectively reduced.

[0055] In one embodiment, the lens adjustment module further includes a first operating member 51 and a second operating member 52, which are respectively fixedly connected to the first screw 43 and the second screw 44 and exposed from the base 2, so that the user can conveniently manually adjust to drive the support member 1 to move along the second direction D2 or drive the support member 1 to move along the first direction D1.

[0056] In summary, the present invention proposes a lens adjustment module, wherein the middle portion of the support member 1 has a hollow area 10 adapted to the size of the lens to accommodate the lens, and the support member 1 has an adjacent first side 11 and a second side 12. A first sliding groove 13 and a corresponding first positioning member 31 are provided on the first side 11, and a second sliding groove 14 and a corresponding second positioning member 32 are provided on the portion of the support member 1 surrounded by the adjacent first side 11, the second side 12 and the hollow area of ​​the support member 1, so that the space of the support member 1 can be fully utilized, the structure is compact, the size of the support member 1 is further reduced, and the lens adjustment module and the projection device are further miniaturized. In addition, the above-mentioned first positioning member 31 and / or first shaft member 41 can cooperate with the first sliding groove 13 to limit the moving range of the support member 1 along the first direction D1, and the second positioning member 32 and / or second shaft member 42 can cooperate with the second sliding groove 14 to limit the moving range of the support member 1 along the second direction D1, which can effectively avoid the situation in the prior art that the movement range of the support member 1 is too large and exceeds the bearing range of the mechanical structure of the lens adjustment module, causing damage to internal parts.

[0057] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A lens adjustment module, characterized in that: include: A base having a first side and a second side adjacent to each other, the first side having a first sliding hole, and the second side having a second sliding hole; A support member, comprising a first side and a second side adjacent to each other, a hollow area being provided in the middle of the support member to accommodate a lens; a first sliding groove extending along a first direction is provided on the first side, the first sliding groove comprising a first slit hole extending along the first direction; a second sliding groove extending along a second direction is provided on a portion of the support member surrounded by the first side, the second side and the hollow area, and the second sliding groove comprises a second slit hole extending along the second direction; A first positioning member and a second positioning member are slidably accommodated in the first sliding groove and the second sliding groove respectively; A first shaft member is fixedly connected to the first positioning member, is passed through the first slit hole, and one end of the first shaft member is inserted into the first sliding hole in a sliding manner along the second direction; and A second shaft member is fixedly connected to the second positioning member and is inserted into the second slit hole, and one end of the second shaft member is inserted into the second sliding hole in a sliding manner along the first direction; Among them, the first positioning member and / or the first shaft member also cooperate with the first sliding groove to limit the moving range of the support member along the first direction, and the second positioning member and / or the second shaft member also cooperate with the second sliding groove to limit the moving range of the support member along the second direction.

2. The lens adjustment module according to claim 1, characterized in that: One of the base and the support is provided with a limiting groove, and the other is provided with a convex column, and the convex column is inserted into the limiting groove.

3. The lens adjustment module according to claim 2, characterized in that: The limiting groove cooperates with the protruding column to limit the movement range of the supporting member relative to the base in the plane formed by the first direction and the second direction; wherein the limiting groove is a columnar groove with an octagonal bottom surface.

4. The lens adjustment module according to claim 1, characterized in that: The hollow area is circular and matches the lens.

5. The lens adjustment module according to claim 1, wherein: The support member further comprises a third side and a fourth side adjacent to each other, the third side being opposite to the first side; wherein the third side is provided with a third sliding groove; The lens adjustment module also includes: a third positioning member, slidably received in the third sliding groove along a first direction and having a first screw hole; and The first screw rod is arranged along the second direction, is rotatably connected to the base, and is threadedly connected to the first screw hole, so that the end of the first screw rod drives the support member to move along the second direction.

6. The lens adjustment module according to claim 5, characterized in that: A fourth sliding groove is provided on the fourth side of the support member; The lens adjustment module also includes: a fourth positioning member, slidably received in the fourth sliding groove along the second direction and having a second screw hole; and The second screw rod is arranged along the first direction, is rotatably connected to the base, and is threadedly connected to the second screw hole, so that the end of the second screw rod drives the support member to move along the first direction.

7. The lens adjustment module according to claim 5, characterized in that: It also includes a fifth sliding groove, the structure of which is the same as that of the second sliding groove, and the fifth sliding groove is arranged at the corner portion of the support member surrounded by the second side, the third side and the hollow area.

8. The lens adjustment module according to claim 6, characterized in that: Also includes: The first operating member and the second operating member are respectively fixedly connected to the first screw rod and the second screw rod and exposed from the base.

9. The lens adjustment module according to claim 1, wherein: The first direction is perpendicular to the second direction.

10. A projection device, characterized in that: include: Lenses, and A lens adjustment module as claimed in any one of claims 1 to 9.

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