Light receiving lens assembly and projection cylinder comprising same

Abstract

A light receiving lens assembly (30) and a projection cylinder (100). The light receiving lens assembly (30) comprises: a housing (31) provided with a front light receiving port (316) and a rear light receiving port (317), wherein a light receiving channel (318) is provided between the front light receiving port (316) and the rear light receiving port (317); and a light receiving lens (32) disposed in the light receiving channel (318), wherein the light receiving lens (32) comprises a front lens (321) and a rear lens (322); the front lens (321) is disposed at the front end of the housing (31), and the rear lens (322) is disposed at the rear end of the housing (31); the end of the housing (31) close to the front light receiving port (316) is provided with a front mounting recess (314), and the end of the housing (31) close to the rear light receiving port (317) is provided with a rear mounting recess (315); the front lens (321) is detachably mounted in the front mounting recess (314), and the rear lens (322) is detachably mounted in the rear mounting recess (315). The replacement and maintenance operation of the light receiving lens is more convenient, thereby improving the replacement and maintenance efficiency of the light receiving lens.

Description

Light collecting mirror assembly and projection tube

[0001] This application claims priority to the Chinese patent applications filed with the Patent Office of China on June 10, 2023, with application number 202321479612.4, titled “Light-collecting mirror assembly and projection tube thereof”, and filed with the Patent Office of China on June 10, 2023, with application number 202321475805.2, titled “Projection tube and light-collecting mirror assembly thereof”, and filed with the Patent Office of China on June 16, 2023, with application number 202321556847.9, titled “Light-collecting mirror assembly and projection tube thereof”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of photographic equipment, and in particular to a light-collecting lens assembly and a projection tube thereof. Background Art

[0003] To achieve a variety of lighting effects for photography and videography, more and more people are adding projection tubes to their video lights. However, with the increasing power of today's video lights, they generate increasing heat over extended periods of operation, causing their temperatures to rise. Because the projection tube is attached to a video light, the light collecting lens assembly is relatively close to the light. This heat can cause cracking in the lens assembly after extended use, necessitating replacement of the lens assembly.

[0004] In a traditional projection tube, the existing lenses are fixedly encapsulated in the outer shell of the light-collecting lens group. When any lens in the light-collecting lens group is broken, the entire light-collecting lens group can only be replaced, and the broken lens cannot be replaced individually. Since the cost of the entire light-collecting lens group is relatively high, frequent replacement of the light-collecting lens group will increase the user's usage cost, which is not conducive to the promotion of the product in the market. Technical issues

[0005] The present application provides a light-collecting lens group and a projection tube thereof, so as to optimize the structure of the light-collecting lens group of the projection tube in the related art and improve the efficiency of replacing and repairing the light-collecting lens in the projection tube. Technical Solutions

[0006] In a first aspect, an embodiment of the present application provides a light collecting lens assembly that is detachably mounted in a projection tube, the light collecting lens assembly comprising:

[0007] The housing is provided with a front light receiving port and a rear light receiving port, and a light receiving channel is provided between the front light receiving port and the rear light receiving port;

[0008] A light-collecting lens is disposed in the light-collecting channel; the light-collecting lens comprises a front lens and a rear lens; the front lens is disposed at the front end of the housing, and the rear lens is disposed at the rear end of the housing;

[0009] Among them, the shell is provided with a front mounting groove at one end close to the front light receiving port, and the shell is provided with a rear mounting groove at one end close to the rear light receiving port; the front lens is detachably mounted in the front mounting groove, and the rear lens is detachably mounted in the rear mounting groove.

[0010] In the light-collecting mirror group, the outer shell includes a first shell and a second shell, and the first shell and the second shell are detachably mounted and fixed; the front lens is detachably mounted in the front mounting groove through the first shell and the second shell, and the rear lens is detachably mounted in the rear mounting groove through the second shell.

[0011] In the light receiving mirror assembly, the first housing is provided with a first mounting hole;

[0012] A second mounting hole is provided on the second shell;

[0013] When the first shell is mounted on the second shell, the first mounting hole corresponds to the second mounting hole, and the first shell and the second shell are detachably fixedly connected through the first mounting hole and the second mounting hole.

[0014] In the light receiving mirror assembly, the light receiving mirror assembly further comprises a front fixing member and a rear fixing member;

[0015] The front fixing member is provided at the front side of the front lens and is detachably connected to the front end of the housing, and is used to restrict the front lens to the front end of the housing;

[0016] The rear fixing member is arranged on the rear side of the rear lens and is detachably connected to the rear end of the shell, and is used to limit the rear lens to the rear end of the shell.

[0017] In the light-collecting mirror assembly, the front fixing member includes a connecting portion and an abutting portion connected to the front side of the connecting portion; the inner diameter of the connecting portion is consistent with the outer diameter of the front end of the housing, and the connecting portion is sleeved on the outer periphery of the front end of the housing and screwed to the housing;

[0018] The abutting portion is located at the front side of the connecting portion and protrudes inwardly from the connecting portion along the circumferential direction. The rear side of the abutting portion abuts against the front side of the front lens.

[0019] In the light receiving mirror assembly, the rear fixing member is annular, the outer diameter of the rear fixing member is consistent with the diameter of the rear end of the light receiving channel, the rear fixing member extends into the rear end of the light receiving channel and is screwed to the inner wall of the housing;

[0020] The inner diameter of the rear fixing member is smaller than the outer diameter of the front end of the rear lens, so that the front side of the rear fixing member abuts against the rear side of the rear lens.

[0021] In the light collecting lens assembly, the front fixing member is annular, the outer diameter of the front fixing member is consistent with the outer diameter of the front end of the housing, and the radial dimension of the front fixing member is larger than the radial dimension of the front end of the housing, so that the rear side of the front fixing member can abut against the front side of the front lens;

[0022] The front fixing member is connected and fixed to the shell by fasteners; the front fixing member is provided with a plurality of first connecting holes spaced circumferentially and the axes of which extend in the front-to-back direction; the front end of the shell is provided with first through holes corresponding to each of the connecting holes one by one, and the fasteners are simultaneously inserted into the first connecting holes and the corresponding first through holes.

[0023] In the light collecting lens assembly, the rear fixing member is annular, the outer diameter of the rear fixing member is consistent with the outer diameter of the rear end of the housing, and the radial dimension of the rear fixing member is larger than the radial dimension of the rear end of the housing, so that the front side of the rear fixing member can abut against the rear side of the rear lens;

[0024] The rear fixing member is connected and fixed to the shell by a connecting member; the rear fixing member is provided with a plurality of second connecting holes spaced circumferentially and the axes of which extend in the front-to-back direction; the rear end of the shell is provided with second through holes corresponding to each of the connecting holes one by one, and the connecting member is simultaneously inserted into the second connecting hole and the corresponding second through hole.

[0025] In the light-collecting mirror assembly, the front mounting groove is formed between the front fixing member and the front end of the housing;

[0026] The rear installation groove is formed between the rear fixing member and the rear end of the shell.

[0027] In the light collecting lens assembly, a front limiting protrusion is circumferentially protruded from the front end of the inner wall of the shell, and the front limiting protrusion protrudes inwardly from the inner wall of the shell along the circumferential direction, and the rear side of the front lens abuts against the front side of the front limiting protrusion;

[0028] A rear limiting notch is circumferentially formed at the rear end of the inner wall of the shell, and the inner diameter of the front side wall of the rear limiting notch is smaller than the outer diameter of the rear lens, so that the front side of the rear lens abuts against the front side wall of the rear limiting notch.

[0029] In the light collecting lens assembly, the front light collecting lens has a convex surface facing backward, and the front limiting protrusion is inclined from front to back toward the axis of the shell to form an inclined surface, which abuts against the convex surface of the front light collecting lens.

[0030] In the light-collecting mirror group, the light-collecting mirror group further includes a buffer member, which includes a first buffer member and a second buffer member, the first buffer member is arranged between the front lens and the front mounting groove, and the second buffer member is arranged between the rear lens and the rear mounting groove.

[0031] In the light receiving mirror assembly, the buffer member includes a front buffer ring and a rear buffer ring;

[0032] The front buffer ring is arranged around the periphery of the front lens;

[0033] The rear buffer ring is arranged around the outer periphery of the rear lens.

[0034] In the light receiving mirror assembly, the buffer member includes a front buffer strip and a rear buffer strip;

[0035] The front buffer strip is disposed around the inner side wall of the front mounting groove;

[0036] The rear buffer strip is arranged around the inner side wall of the rear installation groove.

[0037] In the light receiving mirror assembly, the housing includes a first shell and a second shell, and the first shell and the second shell are detachably mounted and fixed;

[0038] A first mounting groove is provided at the front end of the first shell, and a second mounting groove is provided at the front end of the second shell, wherein the first mounting groove and the second mounting groove are connected to form the front mounting groove;

[0039] A third mounting slot is provided at the rear end of the first shell, and a fourth mounting slot is provided at the rear end of the second shell. The third mounting slot is connected to the fourth mounting slot to form the rear mounting slot.

[0040] In the light receiving mirror assembly, the first buffer member includes a first buffer bar and a second buffer bar, the first buffer bar is provided on the first shell, and the second buffer bar is provided on the second shell;

[0041] The second buffer member includes a third buffer bar and a fourth buffer bar, the third buffer bar is provided on the first shell, and the fourth buffer bar is provided on the second shell;

[0042] The first buffer strip abuts against the outer periphery of the upper end of the front lens, and the second buffer strip abuts against the outer periphery of the lower end of the front lens; the third buffer strip abuts against the outer periphery of the upper end of the rear lens, and the fourth buffer strip abuts against the outer periphery of the lower end of the rear lens.

[0043] In another aspect, an embodiment of the present application provides a projection tube, comprising:

[0044] A main body, provided with a light inlet and a light outlet, wherein the light inlet can be connected to an external light source, and an optical channel is provided between the light inlet and the light outlet;

[0045] an accommodating cavity, which is provided at one end of the optical channel close to the light inlet;

[0046] The light-collecting mirror group adopts any one of the light-collecting mirror groups described above, wherein the light-collecting mirror group is detachably installed in the accommodating cavity, and the light-collecting mirror group can be removed from the accommodating cavity through the light inlet.

[0047] In the projection tube, a first guide portion is provided on the outer wall of the shell;

[0048] A second guide portion adapted to the first guide portion is provided on the inner side wall of the accommodating cavity;

[0049] When the light-collecting mirror assembly is installed in the accommodating cavity, the first guide portion and the second guide portion can be engaged with each other.

[0050] In the projection tube, a first convex strip protruding outward is provided on the lower edge of the first shell, and the first convex strip extends in the front-to-back direction;

[0051] A second convex strip protruding outward is provided on the upper edge of the second shell, and the second convex strip extends in the front-to-back direction;

[0052] When the first shell is mounted on the second shell, the lower end of the first convex strip and the upper end of the second convex strip are in contact with each other and form the first guide portion.

[0053] In the projection tube, a limiting groove is provided between the second guide portion and the inner side wall of the accommodating cavity;

[0054] When the light-collecting mirror assembly is installed in the accommodating cavity, the first convex strip and the second convex strip can extend into the limiting groove.

[0055] In the projection tube, a first groove is provided on the lower edge of the first shell and is recessed inward, and the first groove extends in the front-to-back direction;

[0056] A second groove is formed on the upper edge of the second shell and is recessed inward, and the second groove extends in the front-to-back direction;

[0057] When the first shell is installed on the second shell, the first groove and the second groove fit together to form the first guide portion.

[0058] In the projection tube, the second guide portion is protrudingly provided on the inner side wall of the accommodating cavity;

[0059] When the light-collecting mirror assembly is installed in the accommodating cavity, the second guide portion can extend into the first groove and the second groove. Beneficial effects

[0060] In the light-collecting lens assembly and its projection tube provided by the present application, a front light-collecting port and a rear light-collecting port are provided on the housing, a light-collecting channel is provided between the front light-collecting port and the rear light-collecting port, and a light-collecting lens is installed in the light-collecting channel so that an external light source can enter the light-collecting channel from the front light-collecting port through the light inlet, and then be emitted from the rear light-collecting port and the light outlet after passing through the light-collecting lens, thereby allowing the external light source to pass through the light-collecting lens. The light-collecting lens includes a front lens and a rear lens; the front lens is provided at the front end of the housing, and the rear lens is provided at the rear end of the housing. At the same time, a front mounting groove is provided at one end of the housing near the front light-collecting port, and a rear mounting groove is provided at one end of the housing near the rear light-collecting port, so that the front lens and the rear lens can be removed from the housing. When the light-collecting lens in the light-collecting lens assembly is cracked due to heat, a new front lens and a new rear lens can be easily replaced, thereby making the replacement and maintenance of the light-collecting lens more convenient. At the same time, there is no need to replace the entire light-collecting lens assembly, effectively reducing the use cost and facilitating the promotion of the product in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] FIG1 is a schematic diagram of the three-dimensional structure of the projection tube provided in this embodiment.

[0062] FIG2 is a schematic diagram of the cross-sectional structure of the projection tube provided in this embodiment.

[0063] FIG3 is a schematic structural diagram of the light collecting mirror assembly in FIG2 .

[0064] FIG4 is an exploded view of the light collecting mirror assembly in FIG3 .

[0065] FIG5 is a cross-sectional view of the light collecting mirror assembly in FIG2 .

[0066] FIG6 is a front view structural schematic diagram of the projection tube in FIG1 .

[0067] FIG7 is a schematic structural diagram of the installation of the light collecting mirror assembly in FIG3 .

[0068] FIG8 is a schematic structural diagram of the light collecting mirror assembly in FIG3 in another embodiment.

[0069] FIG. 9 is an exploded view of FIG. 8 .

[0070] FIG10 is a schematic structural diagram of the light collecting mirror assembly in FIG3 in another embodiment.

[0071] FIG. 11 is an exploded view of FIG. 10 .

[0072] FIG12 is a schematic structural diagram of another embodiment of the second guide portion in FIG6 .

[0073] FIG13 is a schematic structural diagram of the light collecting mirror assembly in FIG3 in another embodiment.

[0074] FIG14 is an exploded view of the light collecting mirror assembly in FIG13 .

[0075] FIG15 is a cross-sectional view of the light collecting mirror assembly in FIG13 .

[0076] FIG16 is an enlarged view of portion A in FIG15 .

[0077] FIG17 is an enlarged view of portion B in FIG15 .

[0078] FIG18 is a schematic structural diagram of the light collecting mirror assembly in FIG14 in another embodiment.

[0079] FIG19 is a partial cross-sectional view of the light collecting mirror assembly in FIG18 .

[0080] FIG20 is an exploded view of the light receiving mirror assembly.

[0081] FIG. 21 is an exploded view of the light-collecting mirror assembly of FIG. 20 in another embodiment.

[0082] FIG22 is a partial cross-sectional view of the light-collecting mirror assembly in FIG21 .

[0083] FIG23 is an enlarged view of portion C in FIG22.

[0084] FIG24 is a schematic structural diagram of the installation of the light collecting mirror assembly in FIG21.

[0085] FIG. 25 is an exploded view of the light-collecting mirror assembly of FIG. 21 in another embodiment.

[0086] FIG26 is a partial cross-sectional view of the light collecting mirror assembly in FIG25 .

[0087] FIG27 is an enlarged view of portion D in FIG26 .

[0088] FIG28 is a schematic structural diagram of the installation of the light collecting mirror assembly in FIG25 . Modes for Carrying Out the Invention

[0089] This application provides a light-collecting lens assembly and a projection tube thereof. To make the purpose, technical solution, and effects of this application more clear and explicit, the application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0090] The present application provides a light-collecting mirror assembly and a projection tube thereof.

[0091] 1 to 3 , the projection tube 100 provided by the present application mainly includes a body 1 and an optical lens assembly 20. The optical lens assembly 20 is disposed in the body 1 and adjusts the light emitted by the photographic light to achieve the desired light effect.

[0092] Referring to Figures 1 and 2, in this embodiment, the main body 1 is cylindrical, with a light inlet 11 and a light outlet 12 provided at both ends of the main body 1. The light inlet 11 can be connected to an external video light, and an optical channel 13 is provided between the light inlet 11 and the light outlet. The optical channel 13 is provided in the internal cavity of the main body 1, so that light emitted by the video light can enter from the light inlet 11 at one end of the optical channel 13 and be emitted from the light outlet 12 at the other end.

[0093] 2 , in this embodiment, the body 1 includes a front housing assembly 14 and a rear housing assembly 15. The front housing assembly 14 and the rear housing assembly 15 are slidably connected, and the rear housing assembly 15 is disposed at the rear end of the front housing assembly 14 and is retractable at the rear end of the front housing assembly 14.

[0094] In this embodiment, an optical lens is provided in the optical channel 13 in the rear shell assembly 15. When the front shell assembly 14 is extended and retracted in the rear shell assembly 15, the horizontal position of the optical lens changes, and its relative position with the light-receiving lens group 30 in the rear shell assembly 15 changes, thereby changing the focal length of the projection tube 100. This can change the light effect distance projected by the projection tube 100 to adapt to different application environments.

[0095] As shown in Figure 2, in this embodiment, a accommodating chamber 16 is provided at the front end of the main body 1. The accommodating chamber 16 is provided in the optical channel 13 and is provided at one end of the optical channel 13 near the light inlet 11. The accommodating chamber 16 is connected to the optical channel 13 so that the video light can pass through the light inlet 11, the accommodating chamber 16, the optical channel 13 and the light outlet 12 in sequence, thereby ensuring the use of the projection tube 100.

[0096] 2 and 3 , in this embodiment, the optical lens assembly 20 includes a light-receiving lens assembly 30 and a light effect assembly 40 . The light effect assembly 40 is disposed within the optical channel 13 and at one end of the optical channel 13 near the light outlet 12 . The light effect assembly 40 is used to adjust the light emitted by the projection lamp to achieve a desired light effect.

[0097] In this embodiment, the light effect assembly 40 includes a light-cutting lens assembly 50 and a light-emitting lens assembly 60. The light-collecting lens assembly 30, the light-cutting lens assembly 50, and the light-emitting lens assembly 60 are sequentially arranged along the optical path. The light-collecting lens assembly 30 and the light-cutting lens assembly 50 are positioned within the optical channel 13 of the front housing assembly 14, while the light-emitting lens assembly 60 is positioned within the optical channel 13 of the rear housing assembly 15. The light-cutting lens assembly 50 divides the internal cavity of the front housing assembly 14, allowing the light-collecting lens assembly 30 to be positioned in front of the light-cutting lens assembly 50.

[0098] Referring to Figures 2 to 5 , the light receiving mirror assembly 30 is disposed at one end of the optical channel 13 near the light inlet 11, that is, the light receiving mirror assembly 30 is self-mounted within the accommodating cavity 16. The light receiving mirror assembly 30 and the accommodating cavity 16 are detachably mounted and can be removed from the accommodating cavity 16 through the light inlet 11. Therefore, when the light receiving mirror assembly 30 needs to be replaced or repaired, only the light receiving mirror assembly 30 needs to be removed, without involving the removal of other components. This makes replacement and repair operations more convenient and also eliminates the need to replace the entire light receiving mirror assembly, effectively reducing the user's cost and facilitating product promotion in the market.

[0099] As shown in Figure 5 , in this embodiment, the light-collecting lens assembly 30 includes a housing 31 and a light-collecting lens 32. Housing 31 is provided with a front light-collecting port 316 and a rear light-collecting port 317, with a light-collecting channel 318 disposed between the front and rear light-collecting ports 316 and 317. Light-collecting lens 32 is mounted within light-collecting channel 318, allowing external light to enter light-collecting channel 318 through light inlet 11 from front light-collecting port 316, pass through light-collecting lens 32, and then exit through rear light-collecting port 317 and light outlet 12.

[0100] Please refer to Figures 3 to 5. In this embodiment, the outer shell 31 is a conical shell structure with front and rear openings, so that the light receiving channel 318 is also conical, and the width of the outer shell 31 near the front light receiving port 316 is smaller than the width of the outer shell 31 near the rear light receiving port 317, that is, the width of the outer shell 31 gradually increases in the direction along the light path.

[0101] It should be noted that, in some other embodiments, the housing 31 may also be cylindrical or have other structures.

[0102] Referring to Figures 2 to 5 , in this embodiment, the light-collecting lens 32 includes a front lens 321 and a rear lens 322. The front lens 321 is located at the end of the housing 31 near the light inlet 11, and the rear lens 322 is located at the end of the housing 31 near the light outlet 12. Light from the video light entering the projection tube 100 first passes through the front lens 321 before being emitted by the rear lens 322.

[0103] 4 and 5 , in this embodiment, the width of the front lens 321 is smaller than the width of the rear lens 322. Both the front lens 321 and the rear lens 322 are convex lenses, and both protrude rearward. The radius of curvature of the outer surface of the front lens 321 is greater than the radius of curvature of the outer surface of the rear lens 322, meaning that the focal length of the front lens 321 is greater than that of the rear lens 322.

[0104] Referring to Figures 3 to 6 , in this embodiment, a first guide portion 311 is provided on the outer wall of the housing 31, extending in the front-to-back direction. A second guide portion 161 is provided on the sidewall of the accommodating chamber 16, adapted to mate with the first guide portion 311. When the light receiving lens assembly 30 is installed in the accommodating chamber 16, the first guide portion 311 on the housing 31 cooperates with the second guide portion 161 to provide guidance, thereby securing the light receiving lens assembly 30 within the accommodating chamber 16 and improving its installation stability.

[0105] In this embodiment, the first guide portion 311 is a protrusion 3111 protruding from the outer wall of the shell 31, and the second guide portion 161 is formed with a limiting groove 1611 on the inner wall of the accommodating cavity 16. When the light receiving mirror group 30 is installed in the accommodating cavity 16, the protrusion 3111 on the shell 31 can slide into the limiting groove 1611 on the inner wall of the accommodating cavity 16, so that the light receiving mirror group 30 is limited and fixed in the accommodating cavity 16, thereby improving the installation stability of the light receiving mirror group 30.

[0106] It should be noted that there may be multiple first guide portions 311, which are spaced apart and arranged on the outer wall of the housing 31. There may also be multiple second guide portions 161, which are arranged one-to-one with the first guide portions 311.

[0107] Please refer to Figure 4. In this embodiment, the shell 31 includes a first shell 312 and a second shell 313. The first shell 312 and the second shell 313 are arranged up and down, and the first shell 312 is arranged above the second shell 313. The lower end of the first shell 312 is connected to the upper end of the second shell 313 to form the shell 31.

[0108] In this embodiment, the first housing 312 and the second housing 313 are removably fixed to each other. Specifically, the first housing 312 has a first bolt hole 3122, and the second housing 313 has a second bolt hole 3132. When the first housing 312 is mounted on the second housing 313, the first bolt hole 3122 and the second bolt hole 3132 correspond to each other, securing the first and second housings 312, 313 to each other via the first and second bolt holes 3122, 3132. Therefore, when the light collecting lens 32 needs to be removed, the first housing 312 can be simply opened to remove the light collecting lens 32 from the light collecting lens assembly 30, allowing for replacement and repair of the light collecting lens 32. This process is extremely simple, as no other components are involved, greatly improving the efficiency of replacing and repairing the light collecting lens 32. Furthermore, the entire light collecting lens assembly does not need to be replaced, effectively reducing user costs and facilitating product market promotion.

[0109] Please refer to Figures 4 to 6. In this embodiment, a first latching protrusion 3121 is protruding outward from the lower edge of the first shell 312, and a second latching protrusion 3131 is protruding outward from the upper edge of the second shell 313. When the first shell 312 is installed on the second shell 313, the first latching protrusion 3121 and the second latching protrusion 3131 are attached to each other as a whole. The first latching protrusion 3121 and the second latching protrusion 3131 are attached to each other as a protrusion 3111. The protrusion 3111 can extend into the limiting groove 1611 of the accommodating cavity 16 when the light receiving mirror group 30 is installed in the accommodating cavity 16, so that the shell 31 is limited and fixed in the accommodating cavity 16, and then the light receiving mirror group 30 is limited and fixed in the accommodating cavity 16, thereby improving the installation stability of the light receiving mirror group 30.

[0110] In this embodiment, the first bolt hole 3122 is provided on the first latching protrusion 3121, and the second bolt hole 3132 is provided on the second latching protrusion 3131. When the first housing 312 is mounted on the second housing 313, the first bolt hole 3122 and the second bolt hole 3132 correspond to each other, so that the first housing 312 and the second housing 313 are fixed together by bolts through the first bolt hole 3122 and the second bolt hole 3132.

[0111] 5 and 7 , in this embodiment, an assembly groove is formed on the inner side wall of the housing 31 , and the light collecting lens 32 is installed in the housing 31 through the assembly groove.

[0112] In this embodiment, the assembly groove includes a front mounting groove 314, which is provided on the inner side wall of the outer shell 31. The front mounting groove 314 is annular and surrounds one end near the front light receiving port 316. The front mounting groove 314 is composed of a first mounting groove 3141 and a second mounting groove 3142, wherein the first mounting groove 3141 is provided at one end of the first shell 312 near the front light receiving port 316, and the second mounting groove 3142 is provided at one end of the second shell 313 near the front light receiving port 316. When the first shell 312 and the second shell 313 are fixedly installed, the first mounting groove 3141 and the second mounting groove 3142 are connected to form the front mounting groove 314.

[0113] In this embodiment, the assembly slot also includes a rear mounting slot 315, which is provided on the inner sidewall of the housing 31. The rear mounting slot 315 is annular and surrounds one end near the rear light receiving port 317. The rear mounting slot 315 comprises a third mounting slot 3151 and a fourth mounting slot 3152. The third mounting slot 3151 is provided on the end of the first housing 312 near the rear light receiving port 317, and the fourth mounting slot 3152 is provided on the end of the second housing 313 near the rear light receiving port 317. When the first housing 312 and the second housing 313 are fixedly mounted, the third mounting slot 3151 and the fourth mounting slot 3152 communicate with each other to form the rear mounting slot 315.

[0114] In this embodiment, when installing the front lens 321 and the rear lens 322, the lower end of the front lens 321 is first installed in the second installation groove 3142, and the lower end of the rear lens 322 is installed in the fourth installation groove 3152, so that the front lens 321 and the rear lens 322 are preliminarily installed in the second shell 313, and then the upper end of the front lens 321 is installed in the first installation groove 3141, and the upper end of the rear lens 322 is installed in the third installation groove 3151, so that when the first shell 312 and the second shell 313 are installed and fixed, the front lens 321 is completely installed in the first installation groove 3141 and the second installation groove 3142, so that the front lens 321 is installed in the front installation groove 314, and the front lens 321 is installed at the end of the shell 31 close to the light inlet 11 through the front installation groove 314. The rear lens 322 is completely installed in the third installation groove 3151 and the fourth installation groove 3152 , so that the rear lens 322 is installed in the rear installation groove 315 , and the rear lens 322 is installed at one end of the housing 31 near the light outlet 12 through the rear installation groove 315 .

[0115] Referring to Figures 8 and 9 , in this embodiment, to further enhance the stability of the installation of the light-collecting mirror assembly 30, the first latching protrusion 3121 on the first housing 312 and the second latching protrusion 3131 on the second housing 313 can be replaced. Specifically, a first protrusion 3123 is provided on the lower edge of the first housing 312, extending along the lower edge of the first housing 312, i.e., in the front-to-back direction. A second protrusion 3133 is provided on the upper edge of the second housing 313, extending along the upper edge of the second housing 313, i.e., in the front-to-back direction. When the first housing 312 is mounted on the second housing 313, the lower end of the first protrusion 3123 and the upper end of the second protrusion 3133 abut against each other, thereby forming a single unit and serving as the first guide portion 311. Thus, the first ridge 3123 and the second ridge 3133 extend into the limiting groove 1611 of the accommodating cavity 16, so that the housing 31 is limited and fixed in the accommodating cavity 16, and then the light receiving mirror assembly 30 is limited and fixed in the accommodating cavity 16, further improving the installation stability of the light receiving mirror assembly 30.

[0116] Referring to Figures 10 to 12 , in this embodiment, to further enhance the installation stability of the light-receiving mirror assembly 30, the first retaining protrusion 3121 on the first housing 312 and the second retaining protrusion 3131 on the second housing 313 are interchangeable. Specifically, a first groove 3124 is recessed inwardly along the lower edge of the first housing 312, extending along the lower edge of the first housing 312, i.e., in the front-to-back direction. A second groove 3134 is recessed inwardly along the upper edge of the second housing 313, extending along the upper edge of the second housing 313, i.e., in the front-to-back direction. When the first housing 312 is mounted on the second housing 313, the first groove 3124 and the second groove 3134 are connected and integrated, thereby functioning together as the first guide portion 311. A limiting column 1612 is protruded inwardly from the inner side wall of the accommodating cavity 16, and the limiting column 1612 serves as the second guide portion 161. When the light receiving mirror group 30 is installed in the accommodating cavity 16, the limiting column 1612 can extend into the first groove 3124 and the second groove 3134, so that the outer shell 31 is limited and fixed in the accommodating cavity 16, and the light receiving mirror group 30 is limited and fixed in the accommodating cavity 16, thereby further improving the installation stability of the light receiving mirror group 30.

[0117] In this embodiment, the first bolt hole 3122 can also be installed on the outer wall of the first shell 312, and the second bolt hole 3132 can be installed on the upper end of the second shell 313. As long as the first shell 312 is installed on the second shell 313, the first bolt hole 3122 and the second bolt hole 3132 correspond to each other.

[0118] Referring to FIG. 13 to FIG. 17 , in this embodiment, the housing 31 may be a frustum-shaped whole, with its outer diameter gradually increasing from front to back.

[0119] It should be noted that the housing 31 may also include a first shell 312 and a second shell 313, and the first shell 312 and the second shell 313 are detachably connected. In this case, the first shell 312 and the second shell 313 are formed by dividing the housing 31 into two along its symmetry plane.

[0120] In this embodiment, the housing 31 includes a front fixing member 34 and a rear fixing member 35. The front fixing member 34 is disposed on the front side of the front lens 321. The front fixing member 34 is detachably connected to the front end of the housing 31 and forms a front mounting groove 314 with the front end of the housing 31 for mounting the front lens 321. The rear fixing member 36 is disposed on the rear side of the front lens 321. The rear fixing member 36 is detachably connected to the rear end of the housing 31 and forms a rear mounting groove 315 with the rear end of the housing 31 for mounting the rear lens 322.

[0121] 14 and 15 , in this embodiment, the front fixing member 34 is disposed on the front side of the front lens 321 and is detachably connected to the front end of the housing 31. It cooperates with the front limiting protrusion 3181 to limit the position of the front lens 321. The rear fixing member 35 is disposed on the rear side of the rear lens 322 and is detachably connected to the rear end of the housing 31. It cooperates with the rear limiting notch 3182 to limit the position of the rear lens 322.

[0122] In this embodiment, the front lens 321 and the rear lens 322 are respectively limited and installed on the shell 31 by the front fixing member 34 and the rear fixing member 35. When the front lens 321 and the rear lens 322 need to be replaced, the front fixing member 34 and the rear fixing member 35 only need to be removed from the shell 31, and the front lens 321 and the rear lens 322 located at the two ends of the shell 31 can be taken out. Then, after the new front lens 321 and the rear lens 322 are placed respectively, they are respectively connected to the shell 31 by the front fixing member 34 and the rear fixing member 35 for limiting the position, so as to realize the replacement of the light receiving mirror group 30, and the operation is convenient and simple.

[0123] Referring to FIG. 15 and FIG. 16 , in this embodiment, the cross-section of the front fixing member 34 is annular. The front fixing member 34 includes a connecting portion 341 and an abutting portion 342 connected to the front side of the connecting portion 341 .

[0124] The inner diameter of the connecting portion 341 is consistent with the outer diameter of the front end of the housing 31. The connecting portion 341 is sleeved on the outer periphery of the front end of the housing 31 and is detachably screwed to the housing 31. Specifically, the inner side wall of the connecting portion 341 is provided with a thread, and the outer periphery of the housing 31 is provided with a thread groove that matches the thread, so that the connecting portion 341 can be screwed to the housing 31.

[0125] The abutting portion 342 is located in front of the connecting portion 341 and protrudes inwardly from the connecting portion 341 along the circumferential direction. The inner diameter of the abutting portion 342 is smaller than the outer diameter of the front end of the front lens 321 , so that the rear side of the abutting portion 342 can abut against the front side of the front lens 321 .

[0126] In other embodiments, the front fixing member 34 may also be an annular structure. In this case, the front end of the connecting portion 341 is flush with the front end of the abutting portion 342, and the rear end of the connecting portion 341 is flush with the rear end of the abutting portion 342. The outer diameter of the connecting portion 341 is consistent with the diameter of the front light receiving port 316 of the housing 31. In this case, threads may be formed on the outer periphery of the connecting portion 341, and corresponding thread grooves may be formed on the inner wall of the front end of the housing 31, allowing the connecting portion 341 to be threadedly connected to the housing 31. The inner diameter of the abutting portion 342 is smaller than the outer diameter of the front lens 321 of the housing 31, allowing the rear side of the abutting portion 342 to abut against the front side of the front lens 321.

[0127] 15 and 17 , in this embodiment, the rear fixing member 35 is annular. Its outer diameter matches the diameter of the rear end of the light receiving channel 318 . The rear fixing member 35 extends into the rear end of the light receiving channel 318 and is screwed to the inner wall of the housing 31 .

[0128] Furthermore, the inner diameter of the rear fixing member 35 is smaller than the outer diameter of the rear lens 322 , so that the front side of the rear fixing member 35 abuts against the rear side of the rear lens 322 .

[0129] In other embodiments, the rear fixing member 35 may include a mounting portion and a retaining portion. The mounting portion has an inner diameter that matches the outer diameter of the rear end of the housing 31. The mounting portion is sleeved around the outer periphery of the rear end of the housing 31 and is removably threadedly connected to the housing 31. Specifically, the mounting portion has threads on its inner sidewall, and the outer periphery of the housing 31 has thread grooves that match the threads, enabling the mounting portion to be threadedly connected to the housing 31. The retaining portion is located at the rear of the mounting portion and protrudes circumferentially inward from the mounting portion. The inner diameter of the retaining portion is smaller than the outer diameter of the rear end of the rear lens 322, allowing the front side of the retaining portion to abut against the rear side of the rear lens 322.

[0130] In this embodiment, when the front lens 321 and the rear lens 322 of the projection tube 100 need to be replaced, the light-collecting lens assembly 30 can be first slid forward relative to the housing 31 to remove the light-collecting lens assembly 30; the front fixing member 34 and the rear fixing member 35 can then be rotated to disconnect them from the housing 31, and finally the front lens 321 and the rear lens 322 can be removed from the housing 31. The new front lens 321 is placed at the front end of the housing 31 so that its rear side abuts against the inclined surface of the front stop protrusion 3181 in the housing 31, and then the front fixing member 34 is screwed to the housing 31; the new rear lens 322 is placed at the rear end of the housing 31 so that its front side abuts against the front side wall of the rear stop notch 3182 in the housing 31, and then the rear fixing member 35 is screwed to the housing 31. This completes the replacement of the front lens 321 and the rear lens 322, and the replacement operation is very convenient and simple.

[0131] 18 and 19 , this embodiment is substantially the same as the previous embodiment, with the difference being that the structures of the front fixing member 34 and the rear fixing member 35 are different, and the connection methods of the front fixing member 34 and the rear fixing member 35 to the housing 31 are different.

[0132] Please refer to Figures 18 and 19. In this embodiment, the front fixing member 34 is annular, the outer diameter of the front fixing member 34 is consistent with the outer diameter of the front end portion of the shell 31, and the radial size of the front fixing member 34 is larger than the radial size of the front end of the shell 31. Since the outer diameter of the front lens 321 is consistent with the inner diameter of the front light receiving port 316 at the front end of the shell 31, the rear side of the front fixing member 34 can abut against the front side of the front lens 321.

[0133] In this embodiment, the front fixing member 34 and the outer shell 31 can be connected and fixed by fasteners. Specifically, the front fixing member 34 is provided with a plurality of first connection holes spaced circumferentially, with axes extending in the front-to-back direction. In this case, the front end of the outer shell 31 is provided with first through holes corresponding to each of the connection holes. Fasteners are inserted into both the first connection holes and the corresponding first through holes to achieve connection between the front fixing member 34 and the outer shell 31.

[0134] The rear fixing member 35 is annular, and the outer diameter of the rear fixing member 35 is consistent with the outer diameter of the rear end portion of the shell 31, and the radial size of the rear fixing member 35 is larger than the radial size of the rear end of the shell 31. Since the outer diameter of the rear lens 322 is consistent with the inner diameter of the rear light receiving port 317 at the rear end of the shell 31, the rear side of the rear fixing member 35 can abut against the rear side of the rear lens 322.

[0135] In this embodiment, the rear fixing member 35 and the outer shell 31 can be connected and fixed by a connecting member. Specifically, the rear fixing member 35 is provided with a plurality of second connecting holes spaced circumferentially, with axes extending in the front-to-back direction. In this case, the rear end of the outer shell 31 is provided with second through holes corresponding to each of the connecting holes. The connecting member is inserted into both the second connecting holes and the corresponding second through holes to achieve connection between the rear fixing member 35 and the outer shell 31.

[0136] In this embodiment, both the fastener and the connector can be bolts.

[0137] As shown in Figure 20, in this embodiment, the light-collecting lens assembly 30 includes a housing 31, a light-collecting lens 32, and a buffer. The housing 31 is provided with a front light-collecting port 316 and a rear light-collecting port 317, with a light-collecting channel 318 disposed between the front and rear light-collecting ports 316 and 317. The light-collecting lens 32 is mounted within the light-collecting channel 318, allowing external light to enter the channel 318 through the light inlet 11 and the front light-collecting port 316. After passing through the light-collecting lens 32, the light is emitted from the rear light-collecting port 317 and the light outlet 12. The buffer is disposed between the housing 31 and the light-collecting lens 32. When the light-collecting lens 32 expands due to high temperatures, the buffer acts to cushion the expansion, preventing the light-collecting lens 32 from fracturing due to compression between the light-collecting lens 32 and the housing 31. This effectively increases the service life of the light-collecting lens 32, reduces the operating cost of the projection tube 100, and enhances the user experience.

[0138] In this embodiment, the buffer member includes a first buffer member 331 and a second buffer member 332 .

[0139] In this embodiment, the first buffer member 331 is arranged between the front lens 321 and the front mounting groove 314 to buffer the expansion of the front lens 321, thereby preventing the front lens 321 and the inner wall of the front mounting groove 314 from being broken due to extrusion, thereby effectively increasing the service life of the front lens 321, saving the use cost of the projection tube 100, and effectively improving the user experience.

[0140] In this embodiment, the second buffer member 332 is arranged between the rear lens 322 and the rear mounting groove 315 to buffer the expansion of the rear lens 322, thereby preventing the rear lens 322 and the groove wall of the rear mounting groove 315 from being broken due to extrusion, thereby effectively increasing the service life of the rear lens 322, saving the use cost of the projection tube 100, and effectively improving the user experience.

[0141] In this embodiment, the buffer member may be a buffer ring, which includes a first buffer ring 3311 and a second buffer ring 3321. The first buffer ring 3311 serves as a first buffer member 331 for buffering the front lens 321, and the second buffer ring 3321 serves as a second buffer member 332 for buffering the rear lens 322.

[0142] Specifically, the first buffer ring 3311 is arranged around the outer periphery of the front lens 321, so that when the front lens 321 is installed in the front mounting groove 314, the first buffer ring 3311 is arranged between the outer periphery of the front lens 321 and the inner wall of the front mounting groove 314, so that when the front lens 321 expands due to high temperature, the front buffer sleeve can buffer the expansion of the front lens 321.

[0143] The second buffer ring 3321 is arranged around the outer periphery of the rear lens 322 so that when the rear lens 322 is installed in the rear installation groove 315, the second buffer ring 3321 is arranged between the outer periphery of the rear lens 322 and the inner wall of the rear installation groove 315. Therefore, when the rear lens 322 expands due to high temperature, the front buffer sleeve can buffer the expansion of the rear lens 322.

[0144] It should be noted that, in some embodiments, the buffer ring may be made of a silicone sleeve or other materials with a buffering effect.

[0145] It should also be noted that in some other embodiments, the buffer member may also be a buffer strip, which includes a front buffer strip and a rear buffer strip. The front buffer strip is arranged along the inner sidewall of the front mounting groove 314, and the rear buffer strip is arranged along the inner sidewall of the rear mounting groove 315. The front buffer strip serves as a first buffer member 331 to provide a buffer for the front lens 321, and the rear buffer strip serves as a second buffer member 332 to provide a buffer for the rear lens 322.

[0146] It should also be noted that the buffer strip can be foam or other materials with a buffering effect.

[0147] In this embodiment, when installing the light receiving assembly, the first buffer ring 3311 is first sleeved around the outer periphery of the front lens 321, the front fixing member 34 is then threadedly connected to the front end of the housing 31, and the front lens 321 is installed in the front mounting groove 314, so that the first buffer ring 3311 is clamped between the front mounting groove 314 and the outer periphery of the front lens 321. The second buffer ring 3321 is sleeved around the outer periphery of the rear lens 322, the rear fixing member 35 is then threadedly connected to the rear end of the housing 31, and the rear lens 322 is installed in the rear mounting groove 315, so that the second buffer ring 3321 is clamped between the rear mounting groove 315 and the outer periphery of the rear lens 322.

[0148] Please refer to Figures 21 to 28. This embodiment is roughly the same as the previous embodiment. The difference lies in the different structure of the shell 31, the different formation methods of the front mounting groove 314 and the rear mounting groove 315, and the different structure and installation method of the buffer.

[0149] In this embodiment, the housing 31 includes a first shell 312 and a second shell 313, and the first shell 312 and the second shell 313 are detachably connected. In this case, the first shell 312 and the second shell 313 are formed by dividing the housing 31 into two along its symmetry plane. The first shell 312 and the second shell 313 allow the front lens 321 to be detachably mounted in the front mounting groove 314, and the rear lens 322 to be detachably mounted in the rear mounting groove 315.

[0150] In this embodiment, the front mounting groove 314 is recessed on the inner side wall of the front end of the housing 31 , and the rear mounting groove 315 is recessed on the inner side wall of the rear end of the housing 31 .

[0151] 21 to 25 , in this embodiment, when installing the front lens 321 and the rear lens 322, the first buffer ring 3311 is first sleeved on the outer periphery of the front lens 321, and the second buffer ring 3321 is sleeved on the outer periphery of the rear lens 322. Then, the lower end of the front lens 321 and the lower end of the first buffer ring 3311 are jointly installed in the second mounting groove 3142 of the second shell 313, so that the lower end of the first buffer ring 3311 is clamped between the lower end of the front lens 321 and the inner wall of the second mounting groove 3142. Then, the lower end of the rear lens 322 and the lower end of the second buffer ring 3321 are jointly installed in the fourth mounting groove 3152 of the second shell 313, so that the lower end of the second buffer ring 3321 is clamped between the lower end of the rear lens 322 and the inner wall of the fourth mounting groove 3152, thereby preliminarily installing the front lens 321 and the rear lens 322 in the second shell 313. The first housing 312 is then mounted on top of the second housing 313, with the upper end of the front lens 321 and the upper end of the first buffer ring 3311 being mounted together in the first mounting groove 3141, and the lower end of the rear lens 322 and the upper end of the second buffer ring 3321 being mounted together in the third mounting groove 3151. Thus, the first buffer ring 3311 and the second buffer ring 3321 prevent the front and rear lenses 322 from being squeezed and ruptured against the inner walls of the front and rear mounting grooves 315 when the front and rear lenses 321 and 322 expand due to heat, thereby effectively extending the service life of the front and rear lenses 322, saving the cost of using the projection tube 100, and effectively improving the user experience.

[0152] Please refer to Figures 26 and 27. In this embodiment, the first buffer member 331 includes a first buffer bar 3312 and a second buffer bar 3313. Specifically, the first buffer bar 3312 is installed in the first mounting groove 3141, and the first buffer bar 3312 is in contact with the inner wall of the first mounting groove 3141; the second buffer bar 3313 is installed in the second mounting groove 3142, and the second buffer bar 3313 is in contact with the inner wall of the second mounting groove 3142. When the front lens 321 is installed between the first shell 312 and the second shell 313, the first mounting groove 3141 and the second mounting groove 3142 are connected, the first buffer bar 3312 and the second buffer bar 3312 are connected and serve as the first buffer member 331 together, and the first buffer bar 3313 is in contact with the upper end of the front lens 321. The outer periphery of the front lens 321 is abutted against the outer periphery of the second buffer strip 3313, and the outer periphery of the lower end of the front lens 321 is abutted against the first buffer strip 3312 and the second buffer strip 3313, so that the first buffer strip 3312 and the second buffer strip 3313 are clamped between the outer periphery of the front lens 321 and the outer shell 31, and then when the front lens 321 expands due to heat, the first buffer strip 3312 and the second buffer strip 3313 can play a buffering role for the front lens 321, and the front lens 321 will not be directly squeezed into the metal shell 31, thereby preventing the front lens 321 from being broken due to squeezing, thereby effectively increasing the service life of the front lens 321, saving the use cost of the projection tube 100, and effectively improving the user experience.

[0153] In some embodiments, the second buffer member 332 includes a third buffer bar 3322 and a fourth buffer bar 3323. Specifically, the third buffer bar 3322 is installed in the third mounting groove 3151, and the third buffer bar 3322 is in contact with the inner wall of the third mounting groove 3151; the fourth buffer bar 3323 is installed in the fourth mounting groove 3152, and the fourth buffer bar 3323 is in contact with the inner wall of the fourth mounting groove 3152. When the rear lens 322 is installed between the first shell 312 and the second shell 313, the third mounting groove 3151 and the fourth mounting groove 3152 are connected, the third buffer bar 3322 and the fourth buffer bar 3323 are connected and serve as the second buffer member 332 together, and the third buffer bar 3322 is in contact with the upper end of the rear lens 322. The outer periphery of the rear lens 322 is offset against the outer periphery of the fourth buffer strip 3323, and the outer periphery of the lower end of the rear lens 322 is offset against the third buffer strip 3322 and the fourth buffer strip 3323, so that the third buffer strip 3322 and the fourth buffer strip 3323 are clamped between the outer periphery of the rear lens 322 and the outer shell 31, and then when the rear lens 322 expands due to heat, the third buffer strip 3322 and the fourth buffer strip 3323 can play a buffering role for the rear lens 322, and the rear lens 322 will not be directly squeezed into the metal shell 31, thereby preventing the rear lens 322 from breaking due to squeezing, thereby effectively increasing the service life of the rear lens 322, saving the use cost of the projection tube 100, and effectively improving the user experience.

[0154] 28 , in this embodiment, when installing the front lens 321 and the rear lens 322, first, the second buffer bar 3313 is installed in the second mounting groove 3142 on the second housing 313, the fourth buffer bar 3323 is installed in the fourth mounting groove 3152 on the second housing 313, the first buffer bar 3312 is installed in the first mounting groove 3141 on the first housing 312, and the third buffer bar 3322 is installed in the third mounting groove 3151 on the first housing 312. Then, the outer periphery of the lower end of the front lens 321 is installed in the second mounting groove 3142, and the outer periphery of the lower end of the rear lens 322 is installed in the fourth mounting groove 3152, so that the second buffer bar 3313 is fixed between the second mounting groove 3142 and the outer periphery of the lower end of the front lens 321, and the fourth buffer bar 3323 is fixed between the fourth mounting groove 3152 and the outer periphery of the lower end of the rear lens 322. Finally, the first shell 312 is mounted on the second shell 313, with the outer periphery of the upper end of the front lens 321 mounted in the first mounting groove 3141, and the outer periphery of the upper end of the rear lens 322 mounted in the third mounting groove 3151, so that the first buffer bar 3312 is fixed between the first mounting groove 3141 and the outer periphery of the upper end of the front lens 321, and the third buffer bar 3322 is fixed between the third mounting groove 3151 and the outer periphery of the upper end of the rear lens 322. The first buffer bar 3312, the second buffer bar 3313, the third buffer bar 3322, and the fourth buffer bar 3323 prevent the front lens 321 and the rear lens 322 from being directly pressed against the metal shell 31 after thermal expansion, thus preventing them from cracking due to compression. This effectively increases the service life of the light-collecting lens 32, reduces the cost of using the projection tube 100, and effectively improves the user experience.

[0155] The specific implementation of the above operations can be found in the previous embodiments and will not be repeated here.

[0156] In summary, the present application provides a front light receiving port and a rear light receiving port on the housing, a light receiving channel is provided between the front light receiving port and the rear light receiving port, and then a light receiving lens is installed in the light receiving channel, so that an external light source can enter the light receiving channel from the front light receiving port through the light inlet, and then be emitted from the rear light receiving port and the light outlet after passing through the light receiving lens, thereby allowing the external light source to pass through the light receiving lens. The light receiving lens includes a front lens and a rear lens; the front lens is provided at the front end of the housing, and the rear lens is provided at the rear end of the housing. At the same time, a front mounting groove is provided at one end of the housing near the front light receiving port, and a rear mounting groove is provided at one end of the housing near the rear light receiving port, so that the front lens and the rear lens can be removed from the housing. When the light receiving lens in the light receiving lens group is cracked due to heat, a new front lens and a new rear lens can be easily replaced, thereby making the replacement and maintenance operations of the light receiving lens more convenient, thereby improving the efficiency of the replacement and maintenance of the light receiving lens. At the same time, there is no need to replace the entire light receiving lens group, effectively reducing the use cost, and facilitating the promotion of the product in the market.

[0157] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this application, and all these changes or substitutions should fall within the scope of protection of the claims attached to this application.

Claims

1. A light collecting lens assembly, which is detachably mounted in a projection tube, characterized in that: include: A housing, on which a front light receiving port and a rear light receiving port are provided, and a light receiving channel is provided between the front light receiving port and the rear light receiving port; A light collecting lens, which is arranged in the light collecting channel; the light collecting lens comprises a front lens and a rear lens; the front lens is arranged at the front end of the housing, and the rear lens is arranged at the rear end of the housing; Among them, a front mounting groove is provided at one end of the shell close to the front light receiving port, and a rear mounting groove is provided at one end of the shell close to the rear light receiving port; the front lens is detachably installed in the front mounting groove, and the rear lens is detachably installed in the rear mounting groove.

2. The light collecting mirror assembly according to claim 1, characterized in that: The housing includes a first shell and a second shell, and the first shell and the second shell are detachably mounted and fixed; the front lens is detachably mounted in the front mounting groove through the first shell and the second shell, and the rear lens is detachably mounted in the rear mounting groove through the second shell.

3. The light collecting mirror assembly according to claim 1, characterized in that: The light collecting mirror assembly also includes a front fixing member and a rear fixing member; The front fixing member is disposed at the front side of the front lens and is detachably connected to the front end of the housing, and is used to limit the front lens to the front end of the housing; The rear fixing member is arranged at the rear side of the rear lens and is detachably connected to the rear end of the shell, and is used to limit the rear lens to the rear end of the shell.

4. The light collecting mirror assembly according to claim 3, characterized in that: The front fixing member includes a connecting portion and an abutting portion connected to the front side of the connecting portion; the inner diameter of the connecting portion is consistent with the outer diameter of the front end of the shell, and the connecting portion is sleeved on the outer periphery of the front end of the shell and is screwed to the shell; The abutment portion is located at the front side of the connection portion and protrudes inwardly from the connection portion along the circumferential direction, and the rear side of the abutment portion abuts against the front side of the front lens.

5. The light collecting lens assembly according to claim 4, characterized in that: The rear fixing member is annular, the outer diameter of the rear fixing member is consistent with the caliber of the rear end of the light receiving channel, the rear fixing member extends into the rear end of the light receiving channel and is screwed to the inner wall of the housing; The inner diameter of the rear fixing member is smaller than the outer diameter of the front end of the rear lens, so that the front side of the rear fixing member abuts against the rear side of the rear lens.

6. The light collecting mirror assembly according to claim 3, characterized in that: The front fixing member is annular, the outer diameter of the front fixing member is consistent with the outer diameter of the front end of the housing, and the radial dimension of the front fixing member is larger than the radial dimension of the front end of the housing, so that the rear side of the front fixing member can abut against the front side of the front lens; The front fixing member is connected and fixed to the shell by fasteners; the front fixing member is provided with a plurality of first connecting holes spaced circumferentially and the axes extend along the front-to-back direction, the front end of the shell is provided with first through holes corresponding to each of the connecting holes, and the fasteners are simultaneously inserted into the first connecting holes and the corresponding first through holes.

7. The light collecting mirror assembly according to claim 3, characterized in that: The rear fixing member is annular, the outer diameter of the rear fixing member is consistent with the outer diameter of the rear end of the shell, and the radial dimension of the rear fixing member is larger than the radial dimension of the rear end of the shell, so that the front side of the rear fixing member can abut against the rear side of the rear lens; The rear fixing member is connected and fixed to the outer shell by a connecting member; the rear fixing member is provided with a plurality of second connecting holes spaced circumferentially and the axes extend along the front-to-back direction, and the rear end of the outer shell is provided with second through holes corresponding to each of the connecting holes one by one, and the connecting member is simultaneously inserted into the second connecting hole and the corresponding second through hole.

8. The light collecting mirror assembly according to claim 3, characterized in that: The front mounting groove is formed between the front fixing member and the front end of the housing; The rear installation groove is formed between the rear fixing member and the rear end of the housing.

9. The light collecting mirror assembly according to claim 3, characterized in that: A front limiting protrusion is convexly provided at the front end of the inner wall of the shell along the circumferential direction, and the front limiting protrusion protrudes inwardly from the inner wall of the shell along the circumferential direction, and the rear side of the front lens abuts against the front side of the front limiting protrusion; A rear limiting notch is circumferentially formed at the rear end of the inner wall of the shell, and the inner diameter of the front side wall of the rear limiting notch is smaller than the outer diameter of the rear lens, so that the front side of the rear lens abuts against the front side wall of the rear limiting notch.

10. The light collecting lens assembly according to claim 9, characterized in that: The front light collecting lens has a convex surface facing backwards, and the front limiting protrusion is inclined from front to back toward the axis of the shell to form an inclined surface, and the inclined surface abuts against the convex surface of the front light collecting lens.

11. The light collecting mirror assembly according to claim 1, characterized in that: The light collecting lens assembly further includes a buffer, which includes a first buffer and a second buffer. The first buffer is arranged between the front lens and the front mounting groove, and the second buffer is arranged between the rear lens and the rear mounting groove.

12. The light collecting lens assembly according to claim 11, characterized in that: The buffer member comprises a front buffer collar and a rear buffer collar; The front buffer ring is arranged around the periphery of the front lens; The rear buffer ring is arranged around the outer periphery of the rear lens.

13. The light collecting lens assembly according to claim 11, characterized in that: The buffer member includes a front buffer strip and a rear buffer strip; The front buffer strip is disposed around the inner side wall of the front mounting groove; The rear buffer strip is arranged around the inner side wall of the rear installation groove.

14. The light collecting mirror assembly according to claim 12, characterized in that: The housing comprises a first shell and a second shell, and the first shell and the second shell are detachably mounted and fixed; A first mounting groove is provided at the front end of the first shell, and a second mounting groove is provided at the front end of the second shell, and the first mounting groove is connected to the second mounting groove to form the front mounting groove; A third mounting groove is disposed at the rear end of the first shell, and a fourth mounting groove is disposed at the rear end of the second shell. The third mounting groove is connected to the fourth mounting groove to form the rear mounting groove.

15. The light collecting lens assembly according to claim 14, characterized in that: The first buffer member includes a first buffer bar and a second buffer bar, the first buffer bar is arranged on the first shell, and the second buffer bar is arranged on the second shell; The second buffer member includes a third buffer bar and a fourth buffer bar, the third buffer bar is arranged on the first shell, and the fourth buffer bar is arranged on the second shell; The first buffer strip abuts against the outer periphery of the upper end of the front lens, and the second buffer strip abuts against the outer periphery of the lower end of the front lens; the third buffer strip abuts against the outer periphery of the upper end of the rear lens, and the fourth buffer strip abuts against the outer periphery of the lower end of the rear lens.

16. A projection tube, characterized in that: include: A body, on which a light inlet and a light outlet are provided, wherein the light inlet can be connected to an external light source, and an optical channel is provided between the light inlet and the light outlet; a light effect component is provided in the optical channel, and the light effect component is provided at one end of the optical channel close to the light outlet; An accommodating cavity, which is arranged at one end of the optical channel close to the light inlet; A light collecting mirror assembly, which adopts the light collecting mirror assembly as described in any one of claims 1 to 15, and the light collecting mirror assembly is detachably installed in the accommodating cavity.

17. The projection tube according to claim 16, characterized in that: A first guide portion is provided on the outer wall of the housing; A second guide portion adapted to the first guide portion is provided on the inner side wall of the accommodating cavity; When the light collecting mirror assembly is installed in the accommodating cavity, the first guide portion and the second guide portion can be engaged with each other in a coordinated manner.

18. The projection tube according to claim 17, characterized in that: A first convex strip protruding outward is provided at the lower end edge of the first shell, and the first convex strip extends in the front-to-back direction; A second convex strip protruding outward is provided on the upper edge of the second shell, and the second convex strip extends in the front-to-back direction; When the first shell is mounted on the second shell, the lower end of the first convex strip and the upper end of the second convex strip are attached to each other and form the first guide portion.

19. The projection tube according to claim 18, characterized in that: A limiting groove is provided between the second guide portion and the inner side wall of the accommodating cavity; When the light collecting mirror assembly is installed in the accommodating cavity, the first convex strip and the second convex strip can extend into the limiting groove.

20. The projection tube according to claim 17, characterized in that: A first groove is formed on the lower edge of the first shell and is recessed inward, and the first groove extends in the front-to-back direction; A second groove is provided on the upper edge of the second shell body and is recessed inwards, and the second groove extends in the front-to-back direction; When the first housing is mounted on the second housing, the first groove and the second groove fit together to form the first guide portion; The second guide portion is convexly disposed on the inner side wall of the accommodating cavity; when the light collecting mirror assembly is installed in the accommodating cavity, the second guide portion can extend into the first groove and the second groove.

Images