Projector with front Fresnel lens adjusting mechanism

Abstract

The utility model relates to the technical field of projectors, and discloses a projector with a front Fresnel lens adjusting mechanism, which comprises a projection shell; the projection assembly is arranged in the projection shell, the projection assembly comprises an LED light source, a front Fresnel lens and a mounting rod, a first connecting rod is arranged at the top of the mounting rod, the mounting rod is rotationally arranged on the inner side wall of the projection shell, a strip-shaped groove is formed in one side of the mounting rod, one side of the front Fresnel lens is clamped into the strip-shaped groove, and a second connecting rod is arranged at the top of the mounting rod. The LED light source is arranged opposite to the front Fresnel lens; the lens assembly comprises a second connecting rod, a projection lens and an arc-shaped knob, the projection lens is arranged in the projection shell and used for receiving light from the front Fresnel lens and projecting pictures outwards, and the arc-shaped knob is rotationally arranged at the top end of the projection lens. According to the design, expensive electric elements such as a servo motor are omitted, and the manufacturing cost is reduced; and the space is saved, so that the structure of the whole projector is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of projectors, in particular to a projector with a front mirror adjustment mechanism. Background Art

[0002] Projectors, essential devices for modern multimedia presentations, are widely used in education, business, home entertainment, and other fields. Traditional reflective projectors require a complex system of mirrors to redirect and project light, resulting in bulky equipment and high material costs. To overcome these issues, direct-projection projectors were designed. By optimizing the optical path and eliminating the mirror assembly, they achieve a more compact design and lower manufacturing costs.

[0003] However, most direct-projection projectors currently on the market use electronic adjustment to adjust the front mirror's angle, using precision drive devices such as servo motors to control the mirror's rotation. While this method allows for precise adjustment of both the light output angle and the projection display angle, it undoubtedly increases product complexity and manufacturing costs, resulting in high product prices and limiting the wider market adoption of direct-projection projectors. Utility Model Content

[0004] The main purpose of the utility model is to provide a projector with a front mirror adjustment mechanism, aiming to reduce the complexity and manufacturing cost of a direct-projection projector.

[0005] To achieve the above-mentioned purpose, the utility model provides a projector with a front mirror adjustment mechanism, comprising: a projection shell; a projection assembly, arranged in the projection shell, the projection assembly including an LED light source, a front mirror and a mounting rod, the top of the mounting rod is provided with a first connecting rod, the mounting rod is rotatably arranged on the inner side wall of the projection shell, one side of the mounting rod is provided with a strip groove, one side of the front mirror is snapped into the strip groove, and the LED light source is arranged relative to the front mirror; a lens assembly, comprising a second connecting rod, a projection lens and an arc knob, the projection lens is arranged in the projection shell, the projection lens is used to receive light from the front mirror and project an image outward, the arc knob is rotatably arranged at the top of the projection lens, the arc knob is provided with a connecting seat, one end of the second connecting rod is movably connected to the connecting seat, and the other end of the second connecting rod is movably snapped into the first connecting rod. When in use, rotating the arc knob drives the mounting rod to change the angle of the front mirror mounting plane relative to the LED light source.

[0006] In some embodiments, it also includes a fastening screw threadedly connected to the top of the first connecting rod, and the second connecting rod is provided with a pair of clamping ends at one end away from the connecting seat, and the clamping ends are clamped around the fastening screw. The top of the fastening screw is provided with a tightening part, and the tightening part presses the clamping end against the side wall of the first connecting rod.

[0007] In some embodiments, a first rotating table is provided in the middle of the mounting rod, a second rotating table is provided on the top surface of the first rotating table, and a first mounting hole is provided on the side wall of the projection shell for assembly with the second rotating table, and the second rotating table is rotatably set in the first mounting hole.

[0008] In some embodiments, a fixing post is provided at one end of the second connecting rod close to the connecting seat, and the fixing post is rotatably engaged in the connecting seat.

[0009] In some embodiments, the fixing column includes a first fixing portion and a second fixing portion parallel to each other, the end face edge of the first fixing portion is provided with an anti-slip flange, the first fixing portion and the second fixing portion are snapped into the connecting seat, and the connecting seat is located between the anti-slip flange and the second connecting rod.

[0010] In some embodiments, a first protrusion is provided on the side of the front mirror facing the strip groove, a first limiting hole corresponding to the first protrusion is provided in the strip groove, and the first protrusion is clamped in the first limiting hole.

[0011] In some embodiments, a second protrusion is provided on the side of the front mirror facing the strip groove, and a second limiting hole is provided in the strip groove that passes through the first rotating table and the second rotating table, and the second protrusion is clamped in the second limiting hole.

[0012] In some embodiments, a third protrusion is provided on the side of the front mirror away from the strip groove, and a third rotating table is provided on the side wall of the projection shell corresponding to the third protrusion. A third limiting hole is provided at the center of the third rotating table, and the third protrusion is rotatably engaged in the third limiting hole.

[0013] In some embodiments, the side of the front mirror facing the LED light source is further provided with an LCD display screen, heat-insulating glass and a rear mirror in sequence.

[0014] In some embodiments, a toggle handle is provided in the middle of the arc-shaped knob.

[0015] In the technical solution provided by this utility model, when the user rotates the arc-shaped knob, the rotating connecting seat simultaneously drives the second connecting rod, which in turn drives the first connecting rod, which in turn drives the mounting rod to rotate. The front mirror, which is engaged in the strip groove, is then driven to rotate until the front mirror is adjusted to the optimal focus angle. The arc-shaped knob is then stopped. This design not only eliminates expensive electric components such as servo motors, reducing manufacturing costs, but also saves space, making the entire projector more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a projector with a front mirror adjustment mechanism according to the present utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of an embodiment of a projector with a front mirror adjustment mechanism of the present invention with part of the projection housing removed;

[0019] Figure 3 This is a schematic diagram of a top view of a projector with a front mirror adjustment mechanism according to an embodiment of the present invention, with a portion of the projection housing removed;

[0020] Figure 4 This is a partial structural diagram of an embodiment after the projection assembly and the lens assembly are assembled.

[0021] In the figure: 1, projection housing; 11, first mounting hole; 12, third rotating truncated table; 121, third limiting hole; 2, projection assembly; 21, LED light source; 22, front mirror; 221, first protrusion; 222, second protrusion; 223, third protrusion; 23, mounting rod; 231, first connecting rod; 232, strip groove; 2321, first limiting hole; 2322, second limiting hole; 234, first rotating truncated table Trough; 235, second rotating trough; 3, lens assembly; 31, second connecting rod; 311, clamping end; 312, fixing column; 3121, first fixing part; 3122, second fixing part; 3123, anti-slip flange; 32, projection lens; 33, arc-shaped knob; 331, connecting seat; 332, toggle handle; 4, fastening screw; 41, tightening part; 5, LCD display; 6, heat-insulating glass; 7, rear mirror. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element, or one or more elements can be interposed therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more elements can be interposed therebetween. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only. In the description of the present invention, the terms "first" and "second" are used solely for descriptive purposes and are not to be construed as indicating relative importance or implicitly specifying the number of technical features indicated. Therefore, unless otherwise specified, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; "plurality" means two or more. The term "comprising" and any variations thereof are intended to be non-exclusive, and one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0023] In addition, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. All technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not used to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0024] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Please refer to Figures 1 to 4The utility model provides a projector with a front mirror 22 adjustment mechanism, comprising a projection housing 1; a projection assembly 2, which is arranged in the projection housing 1, and the projection assembly 2 includes an LED light source 21, a front mirror 22 and a mounting rod 23, a first connecting rod 231 is provided on the top of the mounting rod 23, the mounting rod 23 is rotatably arranged on the inner side wall of the projection housing 1, a strip groove 232 is provided on one side of the mounting rod 23, and one side of the front mirror 22 is snapped into the strip groove 232, and the LED light source 21 is arranged relative to the front mirror 22; a lens assembly 3, comprising a second connecting rod 31, The projection lens 32 and the arc knob 33 are arranged in the projection shell 1. The projection lens 32 is used to receive light from the front mirror 22 and project the picture outward. The arc knob 33 is rotatably set at the top of the projection lens 32. The arc knob 33 is provided with a connecting seat 331. One end of the second connecting rod 31 is movably connected to the connecting seat 331, and the other end of the second connecting rod 31 is movably connected to the first connecting rod 231. When in use, the arc knob 33 is rotated to drive the mounting rod 23 to change the angle of the mounting plane of the front mirror 22 relative to the LED light source 21.

[0026] In the technical solution provided by the present utility model, when the user rotates the arc knob 33, the rotating connecting seat 331 simultaneously drives the second connecting rod 31, which in turn drives the first connecting rod 231, which in turn drives the mounting rod 23 to rotate. This drives the front mirror 22, which is engaged in the strip groove 232, to rotate until the front mirror 22 is adjusted to the optimal focus angle position, at which point the arc knob 33 is stopped. This design not only eliminates expensive electric components such as servo motors, reducing manufacturing costs, but also saves space, making the entire projector more compact.

[0027] Please refer to Figures 1 to 4 In this embodiment, the second connecting rod 31 further includes a fastening screw 4 threadedly connected to the top of the first connecting rod 231. A pair of clamping ends 311 are provided at one end of the second connecting rod 31 away from the connecting seat 331. The clamping ends 311 are clamped around the sides of the fastening screw 4. A tightening portion 41 is provided at the top of the fastening screw 4, which presses the clamping ends 311 against the side wall of the first connecting rod 231. A toggle handle 332 is provided in the middle of the arc-shaped knob 33. A semicircular avoidance hole is provided on the inner side of the clamping ends 311. During assembly, the inner sides of the avoidance holes of the two clamping ends 311 are clamped on the outer side of the fastening screw 4. The first connecting rod 231 is rotatably connected relative to the second connecting rod 31 through the cooperation between the tightening portion 41 on the fastening screw 4 and the clamping ends 311.

[0028] Please refer to Figures 1 to 4In this embodiment, a first rotating platform 234 is provided in the middle of the mounting rod 23, a second rotating platform 235 is provided on the top surface of the first rotating platform 234, and a first mounting hole 11 is provided on the side wall of the projection housing 1 for mounting the second rotating platform 235. The second rotating platform 235 is rotatably mounted within the first mounting hole 11. The double-layered rotating platform design increases the strength and stability of the entire structure, ensuring smooth and reliable adjustment of the front mirror 22.

[0029] Please refer to Figures 1 to 4 In this embodiment, a fixing column 312 is provided at one end of the second connecting rod 31 close to the connecting seat 331 , and the fixing column 312 is rotatably engaged in the connecting seat 331 .

[0030] The fixing post 312 comprises a first fixing portion 3121 and a second fixing portion 3122, which are parallel to each other. The first fixing portion 3121 is provided with a retaining flange 3123 on its end edge. These first and second fixing portions 3121 and 3122 snap into place within the connecting base 331, which is located between the retaining flange 3123 and the second connecting rod 31. A gap exists between the first and second fixing portions 3121 and 3122. After the second connecting rod 31 is inserted into the connecting base 331 by squeezing the gap, the retaining flange 3123 secures the second connecting rod 31 to the connecting base 331. This structure remains stable even when subjected to external forces or vibration, ensuring the clarity and stability of the projected image.

[0031] Please refer to Figures 1 to 4In this embodiment, a first protrusion 221 is provided on the side of the front mirror 22 facing the strip groove 232. A first retaining hole 2321 corresponding to the first protrusion 221 is provided in the strip groove 232. The first protrusion 221 is engaged with the first retaining hole 2321. A second protrusion 222 is provided on the side of the front mirror 22 facing the strip groove 232. A second retaining hole 2322 is provided in the strip groove 232, extending through the first rotating platform 234 and the second rotating platform 235. The second protrusion 222 is engaged with the second retaining hole 2322. A third protrusion 223 is provided on the side of the front mirror 22 away from the strip groove 232. A third rotating platform 12 is provided on the sidewall of the projection housing 1 corresponding to the third protrusion 223. A third retaining hole 121 is provided at the center of the third rotating platform 12, extending through the third rotating platform 12. The third protrusion 223 is rotatably engaged with the third retaining hole 121. The cooperation between the first protrusion 221 and the first limiting hole 2321 can prevent it from sliding or shifting in the horizontal direction; the second limiting hole 2322 passes through the two rotating stages, which can not only limit the movement of the front mirror 22 in the horizontal direction, but also prevent it from shifting in the vertical direction to a certain extent; the third protrusion 223, the third rotating stage 12 and the third limiting hole 121 located on the other side of the front mirror 22 not only provide a support point for the rotation adjustment of the front mirror 22, but also ensure the smoothness and accuracy of the adjustment process.

[0032] Please refer to Figures 1 to 4 In this embodiment, the side of the front mirror 22 facing the LED light source 21 is further provided with an LCD display 5, insulating glass 6, and rear mirror 7. When light from the LED light source 21 strikes the LCD display 5, the pixels on the display switch on and off according to the input video signal, forming an image corresponding to the video signal on the LCD display 5. The front mirror 22 is primarily responsible for collecting, converging, and performing preliminary optical transformation of the image light formed on the LCD display 5. The insulating glass 6 is provided primarily to reduce the impact of heat generated by the LCD display 5 during operation on subsequent optical components.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the above embodiments, or to make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A projector with a front mirror adjustment mechanism, characterized in that: include: Projection housing (1); A projection assembly (2) is arranged in the projection housing (1), the projection assembly (2) comprising an LED light source (21), a front mirror (22) and a mounting rod (23), a first connecting rod (231) being provided on the top of the mounting rod (23), the mounting rod (23) being rotatably arranged on the inner side wall of the projection housing (1), a strip groove (232) being provided on one side of the mounting rod (23), a side of the front mirror (22) being snapped into the strip groove (232), and the LED light source (21) being arranged relative to the front mirror (22); The lens assembly (3) comprises a second connecting rod (31), a projection lens (32) and an arc knob (33). The projection lens (32) is arranged in the projection housing (1). The projection lens (32) is used to receive light from the front mirror (22) and project an image outward. The arc knob (33) is rotatably arranged at the top of the projection lens (32). The arc knob (33) is provided with a connecting seat (331). One end of the second connecting rod (31) is movably connected to the connecting seat (331), and the other end of the second connecting rod (31) is movably connected to the first connecting rod (231). When in use, the arc knob (33) is rotated to drive the mounting rod (23) to change the angle of the mounting plane of the front mirror (22) relative to the LED light source (21).

2. The projector with a front mirror adjustment mechanism according to claim 1, characterized in that: It also includes a fastening screw (4) threadedly connected to the top of the first connecting rod (231), and a pair of clamping ends (311) are provided at one end of the second connecting rod (31) away from the connecting seat (331), and the clamping ends (311) are clamped around the fastening screw (4), and a tightening portion (41) is provided at the top of the fastening screw (4), and the tightening portion (41) presses the clamping end (311) against the side wall of the first connecting rod (231).

3. The projector with a front mirror adjustment mechanism according to claim 2, characterized in that: A first rotating platform (234) is provided in the middle of the mounting rod (23), a second rotating platform (235) is provided on the top surface of the first rotating platform (234), a first mounting hole (11) for assembling with the second rotating platform (235) is provided on the side wall of the projection housing (1), and the second rotating platform (235) is rotatably arranged in the first mounting hole (11).

4. The projector with a front mirror adjustment mechanism according to claim 3, characterized in that: A fixing column (312) is provided at one end of the second connecting rod (31) close to the connecting seat (331), and the fixing column (312) is rotatably engaged in the connecting seat (331).

5. The projector with a front mirror adjustment mechanism according to claim 4, characterized in that: The fixing column (312) includes a first fixing portion (3121) and a second fixing portion (3122) parallel to each other, an anti-slip flange (3123) is provided on the end face edge of the first fixing portion (3121), the first fixing portion (3121) and the second fixing portion (3122) are snapped into the connecting seat (331), and the connecting seat (331) is located between the anti-slip flange (3123) and the second connecting rod (31).

6. The projector with a front mirror adjustment mechanism according to claim 5, characterized in that: A first protrusion (221) is provided on the side of the front mirror (22) facing the strip groove (232), a first limiting hole (2321) corresponding to the first protrusion (221) is provided in the strip groove (232), and the first protrusion (221) is snap-connected in the first limiting hole (2321).

7. The projector with a front mirror adjustment mechanism according to claim 3 or 6, characterized in that: A second protrusion (222) is provided on the side of the front mirror (22) facing the strip groove (232), and a second limiting hole (2322) is provided in the strip groove (232) and passes through the first rotating table (234) and the second rotating table (235), and the second protrusion (222) is engaged in the second limiting hole (2322).

8. The projector with a front mirror adjustment mechanism according to claim 7, characterized in that: A third protrusion (223) is provided on a side of the front mirror (22) away from the strip groove (232); a third rotating platform (12) is provided on a side wall of the projection housing (1) corresponding to the third protrusion (223); a third limiting hole (121) penetrating the third rotating platform (12) is provided at the center of the third rotating platform (12); and the third protrusion (223) is rotatably engaged in the third limiting hole (121).

9. The projector with a front mirror adjustment mechanism according to claim 8, characterized in that: An LCD display screen (5), a heat-insulating glass (6) and a rear mirror (7) are sequentially provided on the side of the front mirror (22) facing the LED light source (21).

10. The projector with a front mirror adjustment mechanism according to claim 9, characterized in that: A toggle handle (332) is provided in the middle of the arc-shaped knob (33).

Images