Projection lamp module with film adjusting mechanism

Abstract

The invention belongs to the field of projection lamp light modules, and particularly relates to a projection lamp module with a film adjusting mechanism, which comprises a lens barrel, and a lens assembly, a film assembly and a projection lens which are sequentially arranged in the lens barrel. The core of the invention is that the film adjusting mechanism is composed of a plurality of adjusting screws and at least one bent elastic reset piece. The adjusting screws are in threaded connection with the lens cone in a specific layout and abut against the film fixing disc. One adjusting screw is arranged on one side edge, and two adjusting screws are arranged on the adjacent side edge side by side. The film fixing disc can be pushed to realize one-way translation by rotating a single screw; the film fixing disc can be driven to rotate around the optical axis by adjusting the two side-by-side screws in a differential mode. According to the design, independent, accurate and decoupling adjustment of two translational degrees of freedom and one rotational degree of freedom of the film in a plane is achieved through an extremely simple structure, and the projection vehicle lamp module has the advantages of being compact in structure, convenient to adjust, high in accuracy and good in long-term stability and is suitable for projection vehicle lamps needing multi-module precise splicing.

Description

Technical Field

[0001] This invention belongs to the field of projection lamp lighting modules, and particularly relates to a projection lamp module with a film adjustment mechanism. Background Technology

[0002] In the field of automotive lighting, especially in applications such as adaptive headlights, signal lights, and ground projection lights, projection lighting modules are becoming increasingly important because they can produce precise and shapeable light spots and patterns. The core working principle of this type of module is that the light emitted by the light source is collimated by the optical system and then shines on a film (or mask, aperture) with a specific pattern. This pattern is finally magnified by the projection lens and clearly projected onto the target surface.

[0003] Therefore, the position and angle of the film in the optical path are extremely important. Even a slight translation or angular deflection can directly lead to image blurring, distortion, or positioning errors. Currently, the common practice for adjusting the film is to install a mechanical adjustment mechanism on the film mounting structure to achieve its position calibration. However, this conventional adjustment design has significant problems, including that the elastic elements in the adjustment mechanism and the necessary mounting structure often occupy too much space, restricting the compact design of the module; and existing adjustment schemes face considerable difficulty in achieving independent and precise control of multiple degrees of freedom (translation and rotation) within the film plane. Summary of the Invention

[0004] The purpose of this invention is to provide a projection lamp module with a film adjustment mechanism to solve the technical problem that existing film adjustment schemes are difficult to achieve high-precision and high-stability multi-degree-of-freedom position and angle adjustment in a compact space.

[0005] To achieve the above objectives, the specific technical solution of the projection lamp module with a film adjustment mechanism of the present invention is as follows: A projection lamp module with a film adjustment mechanism includes a printed circuit board, an LED light source, a lens barrel, a lens holder disposed within the lens barrel, multiple optical lenses, a film assembly, and a projection lens. The module is characterized by further including a film adjustment mechanism; the film assembly includes a film fixing plate and a film sheet fixed therein; the film adjustment mechanism includes multiple adjusting screws and at least one elastic reset element; the multiple adjusting screws are threadedly connected to the side wall of the lens barrel, with their ends extending into the lens barrel and abutting against at least one side of the film fixing plate; the elastic reset element is a bent elastic metal wire, with its two ends hooked onto the side of the film fixing plate and its middle abutting against the inner wall of the lens barrel; the installation position of the elastic reset element is opposite to the side of the film fixing plate abutted by the adjusting screws; by rotating the adjusting screws, the film fixing plate can be moved in a direction perpendicular to the optical axis, and the elastic reset element can undergo elastic deformation, thereby adjusting the position of the film sheet in the optical path.

[0006] Furthermore, the number of adjusting screws is three, with two abutting side by side against one side of the film fixing plate, and the other abutting against another side adjacent to that side.

[0007] Furthermore, by differentially adjusting the two adjusting screws located at both ends of one side of the film fixing plate, the film fixing plate can be deflected about a direction perpendicular to the optical axis.

[0008] Furthermore, the elastic reset member provided relative to one of the adjusting screws has two ends hooked onto the sides of the adjacent film fixing plate, and the two protrusions on the middle part abut against the inner wall of the lens barrel.

[0009] Furthermore, the film fixing plate is rectangular; there are two elastic reset members, which are hooked onto two adjacent sides of the film fixing plate and are opposite to the side with the adjusting screw.

[0010] Furthermore, the lens barrel is fixed to the printed circuit board by multiple positioning pins via thermal riveting.

[0011] Furthermore, the lens support and an annular positioning seat are sequentially arranged inside the lens barrel along the optical path direction, and the film fixing disk is slidably disposed between the annular positioning seat and the lens barrel.

[0012] Furthermore, the projection lens is fixed to the light-emitting port of the lens barrel by a threaded connection.

[0013] Furthermore, a projection lamp includes the aforementioned film adjustment structure, wherein the position and angle of the film can be independently adjusted, thereby adjusting the projected pattern.

[0014] The projection lamp module with a film adjustment mechanism of the present invention has the following advantages: By using a bent elastic metal wire with both ends hooked to the film fixing plate and the middle abutting the inner wall of the lens barrel as a reset component, the traditional independent compression spring and matching positioning structure are replaced, realizing the "embedded" integration of the reset mechanism, simplifying the overall structure of the film adjustment mechanism, reducing the number of parts and the radial size of the module, reducing complexity, and providing a solution for the miniaturization and high integration requirements of projection lamps. By setting one adjusting screw on one side of the film fixing plate and two adjusting screws on the adjacent side, this film adjustment mechanism allows the film fixing plate to move freely in the direction perpendicular to the optical axis. At the same time, by differentially adjusting the two parallel screws (i.e., one screws in and the other screws out), the rotation of the film fixing plate around the optical axis can be directly and conveniently controlled. The mutual interference between the three degrees of freedom of adjustment is minimal, which can easily achieve intuitive and efficient adjustment, and solves the problems of mutual interference and difficulty in precise positioning in the traditional multi-point adjustment ring layout. The high-precision, easy-to-operate, multi-degree-of-freedom independent adjustment capability achieved by this invention addresses the positional accuracy issue when splicing multiple modules, making it suitable for multi-module combined projection lamps. When multiple modules need to work together to project complex seamless patterns, the film in each module can be independently, quickly, and accurately calibrated to its theoretical position. This ensures that when multiple modules work together to project complex patterns, the boundaries of each sub-pattern are precisely aligned, eliminating splicing misalignment and gaps. It improves the pattern consistency and integrity of multi-module combined projection lamps in complex lighting scenarios such as dynamic ground projection, laying a solid technical foundation for achieving high-quality seamless projection effects. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic cross-sectional view of the installation structure of the film adjustment mechanism inside the lens barrel according to the present invention; Figure 4 This is a schematic diagram of the film adjustment mechanism and film assembly structure of the present invention; The markings in the diagram are as follows: 1. Printed circuit board; 2. LED light source; 3. Lens barrel; 4. Lens bracket; 5. Optical lens; 6. Projection lens; 7. Film fixing plate; 8. Film; 9. Adjusting screw; 10. Elastic reset component; 11. Annular positioning seat. Detailed Implementation

[0016] To better understand the purpose, structure, and function of this invention, a projection lamp module with a film adjustment mechanism will be described in further detail below with reference to the accompanying drawings.

[0017] like Figure 1-4As shown, the present invention discloses a projection lamp module with a film adjustment mechanism, comprising a printed circuit board 1, an LED light source 2, a lens barrel 3, a lens holder 4 disposed within the lens barrel 3, multiple optical lenses 5, a film assembly, and a projection lens 6. The invention is characterized by further comprising a film adjustment mechanism; the film assembly includes a film fixing plate 7 and a film sheet 8 fixed therein; the film adjustment mechanism includes multiple adjusting screws 9 and at least one elastic reset element 10; the multiple adjusting screws 9 are threadedly connected to the sidewall of the lens barrel 3, and their ends extend into the lens barrel 3 and abut against at least one of the film fixing plates 7. The elastic reset member 10 is a bent elastic metal wire, with its two ends hooked onto the side of the film fixing plate 7 and its middle part abutting against the inner wall of the lens barrel 3. The installation position of the elastic reset member 10 is opposite to the side of the film fixing plate 7 abutted by the adjusting screw 9. By rotating the adjusting screw 9, the film fixing plate 7 can be moved in a direction perpendicular to the optical axis, and the elastic reset member 10 can undergo elastic deformation to adjust the position of the film 8 in the optical path. The projection lens 6 is fixed to the light output port of the lens barrel 3 by a threaded connection. The lens barrel 3 is fixed to the printed circuit board 1 by multiple positioning pins through hot riveting.

[0018] Combination Figure 1-4 As shown, the specific installation process of the present invention includes fixing the LED light source 2 on the printed circuit board 1, setting the film assembly and film adjustment mechanism inside the lens barrel 3, installing the lens bracket 4 and multiple optical lenses 5, and then fixing the lens barrel 3 to the printed circuit board 1 by multiple positioning posts to ensure that the light path channel inside the lens barrel 3 is aligned with the LED light source 2. In the film assembly, the film 8 is fixedly installed in the film fixing plate 7. In the film adjustment mechanism, at least one bent elastic metal wire is used as an elastic reset member 10, with its two ends hooked to the side of the film fixing plate 7 and its middle part abutting against the inner wall of the lens barrel 3. Then, multiple adjusting screws 9 are screwed in from the outside of the lens barrel 3, so that their ends abut against the side of the film fixing plate 7 opposite to the elastic reset member 10. Finally, the projection lens 6 is connected to the light output port of the lens barrel 3 by threads.

[0019] When adjustment of the film 8 is required, rotating an adjusting screw 9 will push the film fixing plate 7 to move in a direction perpendicular to the optical axis, while simultaneously causing the elastic reset member 10 on the opposite side to undergo elastic deformation. By operating different adjusting screws 9, the position of the film fixing plate 7 can be changed, thereby adjusting the position of the film 8 in the optical path until the projected pattern achieves the desired effect.

[0020] There are three adjusting screws 9. Two of them are arranged side-by-side against one side of the film fixing plate 7, and the other is against the adjacent side. By differentially adjusting the two adjusting screws 9 at both ends of one side of the film fixing plate 7, the film fixing plate 7 can be deflected about a direction perpendicular to the optical axis. The three adjusting screws 9 are arranged in a specific layout: two are arranged side-by-side against the same side of the film fixing plate 7, and the other is against the adjacent side. The other sides opposite to these two sides are provided with elastic restoring force by the hooked elastic restoring member 10. The specific adjustment process is as follows: Rotate the adjusting screw 9 that is individually abutted against one side. When the screw is screwed in, its end directly pushes the film fixing plate 7 to move in a direction perpendicular to the optical axis, compressing the elastic reset member 10 on the opposite side; when screwed out, the restoring force of the elastic reset member 10 on the opposite side causes the film fixing plate 7 to move in the opposite direction, thereby realizing independent and linear translation adjustment in the first direction of the translation freedom.

[0021] The film fixing plate 7 is rectangular; there are two elastic reset members 10, which are hooked onto two adjacent sides of the film fixing plate 7 and are opposite to the side with the adjusting screw 9.

[0022] Two adjusting screws 9, which are side-by-side and abut against adjacent sides, are rotated synchronously and in equal amounts. When both screws are screwed in by the same amount, they jointly push the film fixing plate 7 to move in another direction perpendicular to the optical axis (perpendicular to the first direction), compressing the elastic reset member 10 opposite it; when they are screwed out synchronously and in equal amounts, they are reset under the action of the elastic reset member 10. This achieves a second-direction translation adjustment with independent control of another translational degree of freedom.

[0023] Differential adjustment is performed on the two adjusting screws 9 arranged side by side, that is, one is turned in while the other is turned out by an equal amount. This operation causes one end of the film fixing plate 7 to be pushed and the other end to be released. Under the torque generated by the elastic reset member 10 on the opposite side, the film fixing plate 7 rotates (deflects) about a direction perpendicular to the optical axis. By controlling the differential amount, fine and independent calibration of the angle of the projected pattern on the film 8 can be achieved.

[0024] The elastic reset member 10, positioned relative to one of the adjusting screws 9, has its two ends hooked onto the sides of the adjacent film fixing plate 7, with two protrusions in the middle abutting against the inner wall of the lens barrel 3. This design, through the two abutting positions in the middle, cooperates with an adjusting bolt in the middle of the other side of the fixing plate, forming a stable multi-point support frame in the adjustment direction. This structure limits the film fixing plate 7 from unexpected tilting or warping during translational adjustment, ensuring high-precision, high-straightness pure translational movement in a single direction, with clear adjustment feel and accurate positioning. The elastic reset member 10, positioned relative to the two adjusting bolts, adopts a structure with its two ends hooked and a single protrusion in the middle abutting against the inner wall of the lens barrel 3. The single abutting point in the middle of this elastic reset member 10 works in conjunction with the two adjusting bolts located near the two ends on the other side of the film fixing plate 7. When it is necessary to adjust these two bolts in the same direction to achieve translation, the middle abutting point acts as a stable elastic fulcrum, ensuring smooth movement. When differential adjustment is required to drive the film fixing disk 7 to rotate, the central contact point is cleverly transformed into a virtual rotation fulcrum, so that the pushing and pulling action of the two adjusting bolts can be efficiently and smoothly converted into a pure deflection motion of the fixing disk around the direction perpendicular to the optical axis, realizing precise, convenient and controllable adjustment of the rotation angle.

[0025] Inside the lens barrel 3, along the optical path direction, the lens support 4 and an annular positioning seat 11 are arranged sequentially. The film fixing disk 7 is slidably disposed between the annular positioning seat 11 and the lens barrel 3. The combination of the annular positioning seat 11 and the lens barrel 3 forms a space for the film fixing disk 7 to move, providing axial positioning and a stable guide plane for the precise sliding of the film fixing disk 7, ensuring that its adjustment movement is always constrained within a preset plane perpendicular to the optical axis, and preventing tilting or axial movement.

[0026] A projection lamp includes a film adjustment structure, wherein the position and angle of the film 8 can be independently adjusted, thereby adjusting the projected pattern. During installation or when the projected pattern needs calibration, the operator can access and operate the internal film adjustment mechanism through a pre-drilled adjustment hole on the outside. By rotating the adjusting bolts in the corresponding directions, the film fixing plate 7 can be directly driven to achieve precise horizontal or vertical translation, thereby correcting the vertical or horizontal position of the projected pattern. When the projected pattern requires angle correction, differential adjustment (one turning in and one turning out) of the two side-by-side adjusting bolts allows the film fixing plate 7 to deflect around the optical axis. The entire adjustment process is intuitive, convenient, and offers high calibration accuracy.

[0027] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A projection lamp module with a film adjusting mechanism, comprising a printed circuit board (1), an LED light source (2), a lens barrel (3), a lens holder (4) arranged in the lens barrel (3), a plurality of optical lenses (5), a film assembly, and a projection lens (6), characterized in that, The adjusting mechanism for the film includes a plurality of adjusting screws (9) and at least one elastic reset member (10). The plurality of adjusting screws (9) are threadedly connected with the side wall of the lens barrel (3), and the end portions thereof extend into the lens barrel (3) and abut against at least one side edge of the film fixing disc (7). The elastic reset member (10) is a bent elastic wire, and the two ends thereof are respectively hooked on the side edges of the film fixing disc (7), and the middle portion thereof abuts against the inner wall of the lens barrel (3). The installation position of the elastic reset member (10) is opposite to the side edge of the film fixing disc (7) abutting against the adjusting screw (9). By rotating the adjusting screw (9), the film fixing disc (7) can be pushed to move along the direction perpendicular to the optical axis, and the elastic reset member (10) is elastically deformed, so that the position of the film sheet (8) in the optical path is adjusted.

2. The projection lamp module with a film adjusting mechanism according to claim 1, wherein, The number of the adjusting screws (9) is three, wherein two thereof abut against the two end portions of one side edge of the film fixing disc (7), and the other thereof abuts against the middle portion of another side edge adjacent to the side edge.

3. The projection lamp module with a film adjusting mechanism according to claim 2, characterized in that, The two adjusting screws (9) arranged at the two end portions of one side edge of the film fixing disc (7) can make the film fixing disc (7) deflect around the direction perpendicular to the optical axis.

4. The projection lamp module with a film adjusting mechanism according to claim 3, characterized in that, The elastic reset member (10) arranged opposite to one adjusting screw (9) has two ends respectively hooked on the side edges of the adjacent film fixing disc (7), and the middle portion thereof has two side protrusions abutting against the inner wall of the lens barrel (3).

5. The projection lamp module with a film adjusting mechanism according to claim 1, wherein, The film fixing disc (7) is rectangular, and the number of the elastic reset members (10) is two, which are respectively hooked on the two adjacent side edges of the film fixing disc (7) and opposite to the side edges provided with the adjusting screws (9).

6. The projection lamp module with a film adjusting mechanism according to claim 1, wherein, The lens barrel (3) is fixed on the printed circuit board (1) by a plurality of positioning columns through hot riveting.

7. The projection lamp module with a film adjusting mechanism according to claim 1, wherein, The lens barrel (3) is sequentially provided with the lens holder (4) and a ring-shaped positioning seat (11) along the optical path direction in the lens barrel (3), and the film fixing disc (7) is slidingly arranged between the ring-shaped positioning seat (11) and the lens barrel (3).

8. The projection lamp module with a film adjusting mechanism according to claim 1, wherein, The projection lens (6) is fixed on the light outlet port of the lens barrel (3) by a threaded connection mode.

9. A projection lamp characterized by The projection lamp module with the film adjusting mechanism according to any one of claims 1 to 7, wherein the position and angle of the film sheet (8) can be independently adjusted, so as to adjust the projected pattern.

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