Light spot adjustable projection illumination structure

Abstract

The utility model discloses a light spot adjustable projection illumination structure, comprising a light source, a housing and a light transmission cylinder, the housing is provided with an entrance port, a reflection port and an exit port, a position of the housing corresponding to the entrance port is connected with the light source, a position of the housing corresponding to the reflection port is provided with a DMD chip, a conversion member is arranged in the housing in an inclined manner, and the surface of the conversion member faces the DMD chip; the light-transmitting cylinder is communicated with the shell through the exit port, the light-transmitting cylinder is provided with a positioning pin and an adjusting hole, one end of the positioning pin is fixedly connected with the lens base located in the light-transmitting cylinder, the other end of the positioning pin penetrates through the adjusting hole, the positioning pin is in sliding connection with the adjusting hole, and the positioning pin is provided with an adjusting assembly used for adjusting the position of the positioning pin; the position of the positioning pin is adjusted through the adjusting assembly, namely, the positioning pin is driven to move along the hole wall of the adjusting hole, the lens base is driven to move, and the focus of light emitted after focusing of the lens base moves, so that the focus irradiates the target more accurately, and the quality of imaging on the target is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of projection lighting, specifically a projection lighting structure with adjustable light spot. Background Technology

[0002] Projection lighting structure generally refers to an optical structure or design used in an optical system to efficiently couple light emitted from a light source into a projection display or lighting system; it is mainly used in optical devices that require precise control of the light path and light intensity.

[0003] In existing projection lighting structures, light emitted from a light source is imaged by a DMD chip, then focused by an optical fiber through a lens group. The focal point is precisely on the target. More importantly, the distance between the target and the lens group must be constant to ensure that the focal point is exactly on the target. However, in daily use, it is difficult for users to accurately determine the distance between the focal point and the target, resulting in unclear projection and reduced projection quality. Utility Model Content

[0004] The purpose of this invention is to provide a projection lighting structure with adjustable light spot to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An adjustable light spot projection lighting structure includes a light source, a housing, and a light-transmitting tube. The housing has an inlet, a reflection port, and an outlet. The housing is connected to the light source at the position corresponding to the inlet. A DMD chip is disposed outside the housing at the position corresponding to the reflection port. A conversion component is disposed obliquely inside the housing, with the surface of the conversion component facing the DMD chip.

[0007] The light-transmitting tube is connected to the outlet of the housing, and the light-transmitting tube communicates with the housing through the outlet. The light-transmitting tube has a positioning pin and an adjustment hole. One end of the positioning pin is fixedly connected to a lens seat located inside the light-transmitting tube, and the other end of the positioning pin passes through the adjustment hole. The positioning pin is slidably connected to the adjustment hole. The positioning pin is provided with an adjustment component, which is used to adjust the position of the positioning pin.

[0008] In a further technical solution, the adjustment assembly includes a focusing ring and an adjustment seat. The focusing ring is sleeved on the outer wall of the light-transmitting tube and is fixedly connected to the positioning pin. Both ends of the light-transmitting tube extend outwards to form an outer flange one and an outer flange two. The adjustment seat is sleeved between the outer flange one and the outer flange two. A space is provided between the adjustment seat and the light-transmitting tube for the focusing ring to move. The adjustment seat has an internal thread, and the focusing ring has an external thread. The adjustment seat and the focusing ring are threadedly connected.

[0009] In a further technical solution, a circular groove is provided at one end of the lens holder, the lens holder is provided with a transparent pressure ring and a focusing lens, the transparent pressure ring is provided with an external thread, the groove wall of the circular groove is provided with an internal thread, the transparent pressure ring is threadedly connected to the groove wall of the circular groove, and the transparent pressure ring and the bottom of the circular groove are used to limit the position of the focusing lens.

[0010] In a further technical solution, a spring is provided inside the light-transmitting tube, one end of the spring is fixedly connected to one end of the light-transmitting tube, and the other end of the spring is fixedly connected to the side wall surface of the circular groove of the lens holder.

[0011] A further technical solution is to provide a water-cooled cylinder between the corresponding outlet of the housing and the light-transmitting cylinder. One end of the water-cooled cylinder is connected to the housing, and the water-cooled cylinder communicates with the interior of the housing through the outlet. The other end of the water-cooled cylinder is connected to the light-transmitting cylinder, and a water-cooling component is provided on the outer wall of the water-cooled cylinder.

[0012] In a further technical solution, the housing includes an incident part and a reflective part, the incident part and the reflective part are interference-fitted, the incident part is provided with a connecting ring, the outer wall of the connecting ring extends outward with a second flange, the connecting ring is inserted into the incident part, the second flange is interference-fitted with the incident part, a step and a first convex lens are provided inside the incident part, one side of the first convex lens abuts against the step, and the other side of the first convex lens abuts against the connecting ring.

[0013] A further technical solution is provided in the housing, wherein the entrance of the stray light elimination cavity corresponds to the stray light reflection path of the DMD chip; the bottom of the stray light elimination cavity is provided with an extinction pattern, which is perpendicular to the direction of the incident light.

[0014] The beneficial effects of this utility model are:

[0015] This invention utilizes a light beam emitted from a light source, entering the housing through the inlet, and illuminating an inclined conversion element. The conversion element reflects the light beam to a DMD chip outside the housing's reflection port. The DMD chip modulates the light beam to generate imaging light, which is then output from the housing's outlet. The light passes through a light tube, then through a lens mount, and is focused by the lens mount before exiting onto the target. Assuming the imaging quality on the target is low, the user can adjust the position of the positioning pin using an adjustment component. This moves the positioning pin along the wall of the adjustment hole, thereby moving the lens mount and shifting the focal point of the light beam after focusing by the lens mount. This allows the focal point to more accurately illuminate the target, improving the imaging quality on the target.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 : Overall structural diagram of this utility model.

[0018] Figure 2 Side view of this utility model.

[0019] Figure 3 : Cross-sectional view of this utility model.

[0020] Figure 4 The present utility model Figure 3 Enlarged view of part A.

[0021] Figure 5 The following is a structural diagram of the concealed outer flange one, outer flange two, and adjustment assembly of this utility model.

[0022] Figure 6 : Structural diagram of the shell of this utility model.

[0023] Reference numerals: 1. Light source; 2. Housing; 3. Light tube; 4. Inlet; 6. Outlet; 7. DMD chip; 8. Converter; 10. Positioning pin; 11. Lens mount; 12. Focusing ring; 13. Adjustment seat; 14. Outer flange one; 15. Outer flange two; 16. Circular groove; 17. Transparent pressure ring; 18. Focusing lens; 19. Spring; 20. Water-cooling cylinder; 21. Water-cooling assembly; 22. Connecting ring; 23. Flange two; 24. Step; 25. Convex lens one; Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Please refer to Figure 1-6 ;

[0026] This utility model discloses a projection illumination structure with adjustable light spot, which aims to adjust the position of the light spot so that the light spot can just illuminate the target to improve the imaging quality. Specifically, it includes a light source 1, a housing 2 and a light tube 3. The housing 2 has an inlet 4, a reflection port and an outlet 6. The housing 2 is connected to the light source 1 at the position corresponding to the inlet 4. A DMD chip 7 is set on the outside of the housing 2 at the position corresponding to the reflection port. A conversion component 8 is inclinedly set inside the housing 2, with the surface of the conversion component 8 facing the DMD chip 7.

[0027] The light tube 3 is connected to the outlet 6 of the housing 2, and the light tube 3 communicates with the housing 2 through the outlet 6. The light tube 3 is provided with a positioning pin 10 and an adjustment hole. One end of the positioning pin 10 is fixedly connected to the lens seat 11 located inside the light tube 3, and the other end of the positioning pin 10 passes through the adjustment hole. The positioning pin 10 is slidably connected to the adjustment hole. The positioning pin 10 is provided with an adjustment component, which is used to adjust the position of the positioning pin 10.

[0028] Specifically, the light beam is emitted from the light source 1, enters the interior of the housing 2 through the inlet 4, and illuminates the tilted conversion element 8. The conversion element 8 reflects the light beam to the DMD chip 7 outside the reflection port of the housing 2. The DMD chip 7 modulates the light beam to generate imaging light. The modulated light is output from the outlet 6 of the housing 2, passes through the light tube 3, and then through the lens mount 11. After being focused by the lens mount 11, the light beam is emitted to the target. Assuming that the imaging quality on the target is low, the user can adjust the position of the positioning pin 10 by adjusting the component, that is, move the positioning pin 10 along the wall of the adjustment hole, thereby moving the lens mount 11. This causes the focal point of the light beam emitted after being focused by the lens mount 11 to move, so that the focal point is more accurately illuminating the target, thereby improving the imaging quality on the target.

[0029] Furthermore, the adjustment assembly includes a focusing ring 12 and an adjustment seat 13. The focusing ring 12 is sleeved on the outer wall of the light transmission tube and is fixedly connected to the positioning pin 10. Both ends of the light transmission tube 3 extend outwards with a first outer flange 14 and a second outer flange 2315. The adjustment seat 13 is sleeved between the first outer flange 14 and the second outer flange 2315. There is a space between the adjustment seat 13 and the light transmission tube 3 for the focusing ring 12 to move. The adjustment seat 13 has an internal thread, and the focusing ring 12 has an external thread. The adjustment seat 13 and the focusing ring 12 are threadedly connected.

[0030] Specifically, when the operator needs to adjust the position of the positioning pin 10, he first rotates the adjusting seat 13. Since the adjusting seat 13 is locked between the outer flange 14 and the outer flange 2315 of the light tube 3, the position of the adjusting seat 13 in the length direction of the light tube 3 remains unchanged. This causes the focusing ring 12 to move in the length direction of the light tube 3, which in turn moves the positioning pin 10, which in turn moves the lens seat 11, which in turn moves the focusing lens 18 located in the lens seat 11, and thus moves the focal point. The design of the adjusting seat 13 and the focusing ring 12 provides higher adjustment precision. Through the threaded connection, the operator can make fine adjustments and accurately control the position of the lens seat 11, which can avoid the error caused by directly turning the positioning pin 10, and ensure that the adjustment of the light spot size is more accurate, thereby improving the imaging effect of the light spot illuminating the target.

[0031] In this embodiment, a circular groove 16 is provided at one end of the lens holder 11. The lens holder 11 is provided with a transparent pressure ring 17 and a focusing lens 18. The transparent pressure ring 17 is provided with an external thread, and the groove wall of the circular groove 16 is provided with an internal thread. The transparent pressure ring 17 is threadedly connected to the groove wall of the circular groove 16. The transparent pressure ring 17 and the bottom of the groove 16 are used to limit the position of the focusing lens 18.

[0032] During assembly, the focusing lens 18 is first placed at the bottom of the circular groove 16, and then the transparent pressure ring 17 is rotated on the wall of the circular groove 16 to snap the focusing lens 18 into place and fix its position.

[0033] In this embodiment, a spring 19 is provided inside the light-transmitting tube 3. One end of the spring 19 is fixedly connected to one end of the light-transmitting tube 3, and the other end of the spring 19 is fixedly connected to the side wall surface of the circular groove 16 of the lens seat 11.

[0034] The spring force of spring 19 acts on lens mount 11, which in turn acts on positioning pin 10 and is transmitted to focusing ring 12. The focusing ring 12 then rotates through the threaded engagement of adjusting seat 13 to ensure that lens mount 11 is not loose or has any gaps. On the other hand, when the user turns adjusting seat 13, the rebound force of spring 19 causes the operator to feel a damping sensation when turning adjusting seat 13, making it easier for the user to turn adjusting seat 13 to the appropriate position.

[0035] In this embodiment, a water-cooled cylinder 20 is provided between the outlet 6 and the light-transmitting tube 3 corresponding to the housing 2. One end of the water-cooled cylinder 20 is connected to the housing 2, and the water-cooled cylinder 20 communicates with the inside of the housing 2 through the outlet 6. The other end of the water-cooled cylinder 20 is connected to the light-transmitting tube 3. A water-cooling component 21 is provided on the outer wall of the water-cooled cylinder 20.

[0036] It is worth noting that the water-cooling component 21 is a conventional technology in this field, and this embodiment does not limit it. For reference, please refer to the water-cooling jacket alignment component in "CN112501685A A water-cooling jacket alignment component and alignment method".

[0037] Specifically, the light beam is emitted from the light source 1, enters the interior of the housing 2 through the inlet 4, and illuminates the inclined conversion element 8. The conversion element 8 reflects the light beam to the DMD chip 7 outside the reflection port of the housing 2. The DMD chip 7 modulates the light beam to generate imaging light. The modulated light is output from the outlet 6 of the housing 2. Since the water-cooled cylinder 20 is connected to the outlet 6 of the housing 2, the light beam then enters the water-cooled cylinder 20. The light beam is transmitted inside the water-cooled cylinder 20. Since the water-cooled cylinder 20 is equipped with a water-cooling component 21 for heat dissipation, the heat of the light beam can be reduced when it is transmitted from the water-cooled cylinder 20.

[0038] In this embodiment, the housing 2 includes an incident portion and a reflecting portion, which are interference-fitted. The incident portion is provided with a connecting ring 22, and a flange 23 extends outward from the outer wall of the connecting ring 22. The connecting ring 22 is inserted into the incident portion, and the flange 23 is interference-fitted with the incident portion. A step 24 and a convex lens 25 are provided inside the incident portion. One side of the convex lens 25 abuts against the step 24, and the other side of the convex lens 25 abuts against the connecting ring 22. The housing 2 is divided into an interference-fitted incident portion and a reflecting portion. When manufacturing the housing 2, the installation of the convex lens 25 is avoided, making manufacturing more convenient. In addition, during assembly, the convex lens 25 is first delivered from the incident part to abut against the step 24, and then the connecting ring 22 is inserted into the incident part. The connecting ring 22 is fixed by the interference fit between the flange of the connecting ring 22 and the incident part, thereby fixing the convex lens 25. Compared with the direct interference fit between the connecting ring 22 and the incident part, it is easier to insert and remove the connecting ring 22.

[0039] Furthermore, the housing 2 is provided with a stray light elimination cavity, the entrance of which corresponds to the stray light reflection path of the DMD chip 7; the bottom of the stray light elimination cavity is provided with an extinction pattern, which is perpendicular to the direction of the incident light.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A spot size adjustable projection illumination structure, characterized by, The device includes a light source (1), a housing (2), and a light tube (3). The housing (2) has an inlet (4), a reflection port, and an outlet (6). The housing (2) is connected to the light source (1) at the position corresponding to the inlet (4). A DMD chip (7) is disposed outside the housing (2) at the position corresponding to the reflection port. A conversion element (8) is disposed obliquely inside the housing (2), with the surface of the conversion element (8) facing the DMD chip (7). The light-transmitting tube (3) is connected to the outlet (6) of the housing (2), and the light-transmitting tube (3) communicates with the housing (2) through the outlet (6). The light-transmitting tube (3) is provided with a positioning pin (10) and an adjustment hole. One end of the positioning pin (10) is fixedly connected to the lens seat (11) located inside the light-transmitting tube (3), and the other end of the positioning pin (10) passes through the adjustment hole. The positioning pin (10) is slidably connected to the adjustment hole. The positioning pin (10) is provided with an adjustment component, which is used to adjust the position of the positioning pin (10).

2. The spot size adjustable projection illumination structure according to claim 1, wherein, The adjustment assembly includes a focusing ring (12) and an adjustment seat (13). The focusing ring (12) is fitted on the outer wall of the light-transmitting tube and is fixedly connected to the positioning pin (10). Both ends of the light-transmitting tube (3) extend outwards with a first outer flange (14) and a second outer flange (23) and (15). The adjustment seat (13) is fitted between the first outer flange (14) and the second outer flange (23) and (15). There is a space between the adjustment seat (13) and the light-transmitting tube (3) for the focusing ring (12) to move. The adjustment seat (13) has an internal thread, and the focusing ring (12) has an external thread. The adjustment seat (13) is threadedly connected to the focusing ring (12).

3. The spot size adjustable projection illumination structure according to claim 1, wherein, The lens holder (11) has a circular groove (16) at one end. The lens holder (11) is provided with a transparent pressure ring (17) and a focusing lens (18). The transparent pressure ring (17) is provided with an external thread, and the groove wall of the circular groove (16) is provided with an internal thread. The transparent pressure ring (17) is threadedly connected to the groove wall of the circular groove (16). The transparent pressure ring (17) and the bottom of the groove (16) are used to limit the position of the focusing lens (18).

4. The spot size adjustable projection illumination structure according to claim 1, wherein, A spring (19) is provided inside the light-transmitting tube (3). One end of the spring (19) is fixedly connected to one end of the light-transmitting tube (3), and the other end of the spring (19) is fixedly connected to the side wall surface of the circular groove (16) of the lens holder (11).

5. The spot size adjustable projection illumination structure according to claim 1, wherein, A water-cooled cylinder (20) is provided between the outlet (6) of the housing (2) and the light-transmitting cylinder (3). One end of the water-cooled cylinder (20) is connected to the housing (2), and the water-cooled cylinder (20) communicates with the interior of the housing (2) through the outlet (6). The other end of the water-cooled cylinder (20) is connected to the light-transmitting cylinder (3). A water-cooling assembly (21) is provided on the outer wall of the water-cooled cylinder (20).

6. The spot size adjustable projection illumination structure according to claim 1, wherein, The housing (2) includes an incident part and a reflective part. The incident part and the reflective part are interference-fitted. The incident part is provided with a connecting ring (22). The outer wall of the connecting ring (22) extends outward with a flange (23). The connecting ring (22) is inserted into the incident part. The flange (23) is interference-fitted with the incident part. The incident part is provided with a step (24) and a convex lens (25). One side of the convex lens (25) abuts against the step (24), and the other side of the convex lens (25) abuts against the connecting ring (22).

7. The spot size adjustable projection illumination structure according to claim 1, wherein, The housing (2) is provided with a stray light elimination cavity, the entrance of which corresponds to the stray light reflection path of the DMD chip (7); the bottom of the stray light elimination cavity is provided with an extinction pattern, which is perpendicular to the direction of the incident light.

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