CN220438734U - Projection tube - Google Patents

Abstract

The embodiment relates to a projection cylinder, which belongs to the technical field of photographic equipment. It comprises a cylinder body and a light receiving lens group. The front end of the cylinder body is opened and communicated with the internal space of the cylinder body, so that an installation cavity is formed at the front end of the cylinder body, a light outlet is formed in the rear end face of the cylinder body, and a light effect device for changing light effect is arranged in the internal space between the light outlet and the opening. The cylinder body is equipped with first guide part on the inside wall of installation cavity department that corresponds. The light receiving lens group comprises a shell and a light receiving lens arranged on the shell, and a second guiding part matched with the first guiding part is arranged on the outer side surface of the shell. The light receiving lens group is installed into the installation cavity from the opening of the cylinder body, and the second guide part is connected with the first guide part in an adapting mode, so that the light receiving lens group is installed in the installation cavity in a set path and a fixed angle. In order to solve the assembly time of the light receiving lens group of traditional projection section of thick bamboo and need finely tune, influenced assembly efficiency's problem.

Description

Projection tube

Technical Field

The utility model relates to the technical field of photographic equipment, in particular to a projection cylinder.

Background

In order to realize various photographic light effects, more and more people can install projection cylinders on the photographic lamps. With the current photography lamp having higher power, the temperature generated by the photography lamp is higher, and the lens of the lens is required to be replaced after long-term use because the lens is relatively close to the photography lamp after the projection tube is assembled on the photography lamp.

In the present projection tube, people can only determine the assembly position of the light-receiving lens group by means of their own experience, and after the light-receiving lens group is accommodated in the tube main body, the position of the light-receiving lens group needs to be finely adjusted, so that the light-receiving lens group is fixed on the axis of the projection tube, the operation is inconvenient, and the assembly efficiency is affected.

Disclosure of Invention

The utility model aims to solve the problem that the assembly efficiency is affected by fine adjustment during the assembly of the light receiving lens group of the traditional projection cylinder.

In order to solve the above technical problems, the present utility model provides a projection tube, including: the front end of the cylinder body is opened and is communicated with the internal space of the cylinder body, so that an installation cavity is formed at the front end of the cylinder body, a light outlet is formed in the rear end face of the cylinder body, and a light effect device for changing light effect is arranged in the internal space between the light outlet and the opening; a first guide part is arranged on the inner side wall of the cylinder main body corresponding to the installation cavity; the light receiving lens group comprises a shell and a light receiving lens arranged on the shell, and a second guide part matched with the first guide part is arranged on the outer side surface of the shell; the light receiving lens group is installed into the installation cavity from the opening of the cylinder main body, the second guide part is connected with the first guide part in an adapting mode, the light receiving lens group is installed in the installation cavity at a fixed angle, light emitted by the photographic lamp enters from the opening, sequentially passes through the light receiving lens group in the installation cavity and light effect devices behind the installation cavity, and is emitted from the light outlet.

Optionally, the first guiding part is a groove structure arranged on the inner side wall of the cylinder main body, and the groove structure extends along the axial direction of the cylinder main body; the second guide part is a boss structure protruding on the outer side wall of the shell, and the boss structure extends along the axial direction of the shell; the second guide part is matched with the first guide part.

Optionally, the first guide part is a boss structure arranged on the inner side wall of the cylinder main body and extends along the axial direction of the cylinder main body; the second guide part is of a groove structure concavely arranged on the outer side wall of the shell and extends along the axial direction of the shell; the second guide part is matched with the first guide part.

Optionally, at least two second guiding parts are arranged on the shell; part of the second guide parts are boss structures, and the rest of the second guide parts are groove structures; the boss structures and the groove structures are arranged at intervals along the circumferential direction of the shell; the inner side wall of the barrel body is provided with a groove structure corresponding to the boss structure on the shell and a boss structure corresponding to the groove structure on the shell, so that the boss structure and the groove structure on the lens group can slide along the groove structure and the boss structure in the barrel body so as to enter the mounting cavity.

Optionally, the cylinder main body further comprises a connecting plate and a bearing platform, the connecting plate is connected with the inner side wall of the mounting cavity, the bearing platform is arranged on the connecting plate and protrudes towards the axis direction of the cylinder main body, and the first guide part is arranged on the side surface of the bearing platform, which is away from the connecting plate.

Optionally, a positioning plane is arranged on one end of the shell facing the cylinder main body; the barrel body is internally provided with a positioning block matched with the positioning plane, and when the light collecting lens group is accommodated in the mounting cavity, the positioning block is abutted to the positioning plane, so that the light collecting lens group is abutted to the mounting cavity at a fixed angle.

Optionally, the projection cylinder further comprises a bayonet component detachably connected to the front end surface of the cylinder body and connected with the light-receiving lens group so as to fix the light-receiving lens group to the mounting cavity; the bayonet piece is provided with a light hole, the bayonet piece is connected with the cylinder main body, and the light hole is opposite to the light receiving lens.

Optionally, a fixing groove is formed in an end face, facing the barrel body, of the bayonet piece, a fixing block is arranged on a front end face, facing the bayonet, of the barrel body, the fixing block is accommodated in the fixing groove, and the bayonet piece is abutted to the barrel body at a set angle.

Optionally, the lateral wall at shell both ends epirelief is equipped with the location muscle, bayonet fitting with protruding be equipped with on the section of thick bamboo main part with location muscle matched with spacing muscle, spacing muscle with location muscle looks butt, in order to with light receiving lens group axial fixity is in the installation cavity.

Optionally, the bayonet piece includes a bayonet body and a bayonet outer edge, the bayonet outer edge is disposed at one end of the bayonet body and extends out along a radial direction of the bayonet body, and the bayonet outer edge is provided with a plurality of through holes for connecting with the cylinder main body; the outer side surface of the bayonet body is convexly provided with a plurality of locking blocks which are uniformly distributed, and the locking blocks are used for being matched with locking grooves on the photographic lamp so as to fix the photographic lamp on the projection cylinder.

According to the technical scheme, the beneficial effects of the utility model are as follows:

the application provides a projection tube, including a tube body and a light receiving lens group. The front end of the cylinder body is open and communicates with its own internal space to form an installation chamber at the front end of the cylinder body. The inner side wall of the cylinder body corresponding to the mounting cavity is provided with a first guide part. The light receiving lens group comprises a shell and a light receiving lens arranged on the shell, and a second guiding part matched with the first guiding part is arranged on the outer side surface of the shell.

When the light collecting lens group enters the mounting cavity through the opening of the front end face of the cylinder body, the second guide part of the light collecting lens group is mutually butted with the first guide part of the mounting cavity, so that the light collecting lens group is mounted in the mounting cavity at a set angle, and the light collecting lens group is limited to rotate in the mounting cavity. The cooperation of first guiding portion and second guiding portion can make the light receiving lens group accurately fix a position, does not need to adjust its position again in the change process of light receiving lens group, and the operation is very simple and convenient, has greatly improved and has changed light receiving lens group installation work efficiency, and the staff of being convenient for is changed the maintenance of light receiving lens group.

Drawings

FIG. 1 is a schematic perspective view of a projection tube;

FIG. 2 is an exploded view of the projection cartridge of FIG. 1;

FIG. 3 is a schematic side view of the cartridge body of the projection cartridge of FIG. 1;

FIG. 4 is a schematic cross-sectional elevation view of the projection cartridge of FIG. 1;

FIG. 5 is a schematic perspective view of a lens assembly of the projection tube of FIG. 2;

FIG. 6 is a schematic perspective view of a connecting plate and a platform of the projection tube in FIG. 2;

FIG. 7 is a schematic perspective view of a bayonet of the projection cartridge of FIG. 2;

FIG. 8 is a perspective view of a lens assembly with a locating plane;

FIG. 9 is a schematic side view of the cartridge body with the lens group of FIG. 8 mated;

FIG. 10 is a schematic cross-sectional view of a projection cylinder with the lens group of FIG. 8 mounted;

FIG. 11 is an enlarged schematic view of the projection cartridge of FIG. 10 at A;

FIG. 12 is a schematic perspective view of a lens assembly of another configuration;

FIG. 13 is a schematic side view of the lens group of FIG. 12;

FIG. 14 is a schematic side view of the cartridge body mated with the lens group of FIG. 12;

FIG. 15 is a schematic perspective view of a lens assembly of another configuration;

FIG. 16 is a schematic side view of the lens assembly of FIG. 15;

fig. 17 is a schematic side view of a cartridge body mated with the lens group of fig. 15.

The reference numerals are explained as follows: 100. a projection cylinder; 10. a cartridge body; 11. a housing; 111. a first housing; 112. a second housing; 12. a light effect assembly; 13. a lens group; 14. a mounting chamber; 15. the first limit rib; 151. a protruding position; 16. a first guide part; 161. a connecting plate; 162. bearing platform; 17. a positioning block; 18. a fixed block; 20. a light receiving lens group; 21. a housing; 22. a light receiving lens; 23. positioning ribs; 231. front positioning ribs; 232. rear positioning ribs; 24. a second guide part; 25. positioning a plane; 30. a bayonet fitting; 31. a bayonet body; 311. a light hole; 312. a locking block; 32. the outer edge of the bayonet; 33. the second limit rib; 34. a fixing groove; 40. a screw; 50. and (5) fixing rings.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model will be described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the utility model.

In the description of the present application, it should be understood that in the embodiments shown in the drawings, indications of directions or positional relationships (such as up, down, left, right, front, rear, etc.) are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or elements referred to must have a particular orientation, be configured and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the position of these elements changes, the indication of these directions changes accordingly.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 17, the present embodiment provides a projection barrel 100, which includes a barrel body 10 and a lens group 20. The lens group 20 is installed in the barrel body 10 in a set path and at a fixed angle by providing the first guide portion 16 in the barrel body 10 and providing the second guide portion 24 on the lens group 20 to be fitted to the first guide portion 16.

It should be understood that, in this embodiment, the front end refers to the end of the projection tube 100 into which the light of the photographing lamp enters, and the rear end refers to the end from which the light exits.

Referring to fig. 1 to 4, the front end of the cartridge body 10 is opened and communicates with the inner space thereof to form a mounting chamber 14 at the front end of the cartridge body 10. The rear end face of the barrel body 10 is provided with a light outlet, and a light effect device for changing light effect is arranged in an inner space between the light outlet and the opening.

Specifically, referring to fig. 2 and 4, the cartridge body 10 of the present embodiment includes a housing 11 and a light effect device provided in the housing 11. The light effect device comprises a light effect assembly 12 and a lens group 13. The housing 11 is provided with a receiving channel for light to pass through, and the light effect assembly 12 and the lens group 13 are arranged in the receiving channel of the housing 11 to perform light effect treatment on the light passing through the receiving channel.

The light effect component 12 may include a diaphragm, a projection film, and other components capable of changing the light effect, and the light effect component 12 may be inserted into the accommodating channel in the housing 11 through the opening in the housing 11, so that the light emitted by the photographic lamp may pass through the light effect component 12 in the accommodating channel and generate various light effects.

With continued reference to fig. 4, the housing 11 in this embodiment is composed of a first housing 111 and a second housing 112, and the first housing 111 is slidably connected to the second housing 112. The receiving passage of the front end of the first housing 111 of the present embodiment is configured to form a mounting chamber 14 for receiving the lens group 20. And the front end surface of the first housing 111 is provided with an opening having a diameter larger than that of the light-receiving lens group 20 so that the light-receiving lens group 20 can enter the mounting chamber 14 therethrough.

The lens group 13 is disposed in the accommodating channel in the second housing 112, and the lens group 13 cooperates with the lens group 20 to adjust the focal length of the photographing cylinder. When the second housing 112 slides along the axial direction of the barrel body 10 to extend or retract from the rear end of the first housing 111, the lens group 13 in the second housing 112 moves together with the second housing 112, so as to change the relative distance between the lens group 13 and the light receiving lens group 20, further change the focal length of the projection barrel 100, and change the light efficiency distance of the projection barrel 100.

Referring to fig. 2 and 4, the light-receiving lens group 20 may be introduced into the mounting chamber 14 of the cartridge body 10 along an opening on the front end surface of the cartridge body 10. The inner side wall of the barrel body 10 corresponding to the mounting chamber 14 is provided with a first guide part 16, the outer side surface of the shell 21 is provided with a second guide part 24 matched with the first guide part 16, and when the first guide part 16 and the second guide part 24 are in butt joint sliding, the light collecting lens group 20 is mounted in the mounting chamber 14 at a set angle.

It should be understood that the shapes of the first guide portion 16 and the second guide portion 24 may be varied, such as a plurality of cooperating shapes of a slider and a slide rail, a protrusion and a slide groove, etc. The relative abutting positioning of the first guide portion 16 and the second guide portion 24 may be satisfied, so that the lens group 20 may be mounted in the mounting chamber 14 in a set path.

In the present embodiment, referring to fig. 2, 5 and 6, the first guide portion 16 is a groove structure provided on the cartridge body 10, which extends in the axial direction of the cartridge body 10. The second guide portion 24 is a boss structure protruding on the outer side wall of the housing 21, the boss structure extends along the axial direction of the housing 21, and the boss structure is adapted to the groove structure. When the boss structure on the housing 21 slides along the groove structure in the barrel body 10, the lens group 20 slides in a set path and is mounted into the mounting chamber 14.

As shown in fig. 5, when the second guiding portion 24 is a boss structure, one side surface of the boss structure is connected to the housing 21, and the other side surface of the boss structure protrudes outwards and is parallel to the axis of the cylinder body 10, so that the boss structure can better butt against the groove structure formed by the first guiding portion 16 on the cylinder body 10.

Referring to fig. 2 and 6, in the present embodiment, the cartridge body 10 further includes a connecting plate 161 and a bearing platform 162, the connecting plate 161 is connected to an inner sidewall of the mounting chamber 14, the bearing platform 162 is disposed on the connecting plate 161, and the first guide 16 is disposed on a top surface of the bearing platform 162 facing away from the connecting plate 161. In this embodiment, the first guiding portion 16 is a groove structure.

Wherein, the connection plate 161 is provided with four connection holes for fixing with the inner side wall of the cartridge body 10 so that it can be fixed in the installation chamber 14. The bearing platform 162 is disposed on the connection plate 161 and protrudes upward. As shown in fig. 3, the bottom surface of the groove structure on the upper surface of the bearing platform 162 is slightly higher than the side wall of the opening of the front end surface of the barrel body 10, and the boss structure on the housing 21 can be slidably matched with the groove structure in the barrel body 10, so that the light collecting lens group 20 can enter the mounting chamber 14 along a fixed path.

It is contemplated that the first guide 16 may be formed directly from the inside wall of the cartridge body 10. When the housing 11 of the tube body 10 is manufactured, a groove structure extending along the tube body 10 is integrally formed directly on the inner side of the housing 11, and the butt joint of the light receiving lens group 20 is realized by the groove structure being matched with the protrusion on the light receiving lens group 20.

In other embodiments, referring to fig. 12 to 17, the positions of the groove structures and the boss structures may be interchanged such that the groove structures are provided on the housing 21 of the lens group 20 and the boss structures are provided on the inner side wall of the barrel body 10 at the mounting chamber 14.

For example, in fig. 15 to 17, the first guide portion 16 is a boss structure provided on the inner side wall of the cylinder body 10, and extends in the axial direction of the cylinder body 10. The second guide portion 24 is a groove structure concavely provided on the housing 21, and extends in the axial direction of the housing 21. The groove structure on the housing 21 is adapted to the boss structure on the cartridge body 10 and slides relatively so that the lens group 20 can enter the mounting chamber 14 of the cartridge body 10 in a set path.

At this time, the first guide 16 may be still disposed on the top surfaces of the connection plate 161 and the abutment 162, and connected to the upper surface of the abutment 162 away from the connection plate 161 to form the first guide 16 so as to be engaged with the groove structure of the housing 21. Of course, the first guide portion 16 may be provided directly on the inner side wall of the cartridge body 10 and extend beyond the side wall of the opening of the front end surface of the cartridge body 10.

In other embodiments, the first guide portion 16 and the second guide portion 24 may be provided in plural, a part of the second guide portion 24 on the housing 21 is provided as a boss structure, the rest of the second guide portion 24 on the housing 21 is provided as a groove structure, and the boss structure and the groove structure are arranged at intervals along the circumferential direction of the housing 21.

Correspondingly, the inner side wall of the barrel body 10 is provided with a groove structure corresponding to the boss structure of the shell 21 and a boss structure corresponding to the groove structure of the shell 21, so that the boss structure and the groove structure on the light receiving lens group 20 can slide along the groove structure and the boss structure in the barrel body 10 to enter the mounting cavity 14.

Of course, as shown in fig. 12 to 17, the plurality of second guide portions 24 may each be provided in a boss structure or a groove structure, and correspondingly, the plurality of first guide portions 16 may also each be provided in a groove structure or a boss structure. So that the light receiving lens group 20 enters into the mounting chamber of the cartridge body 10 in a set path.

Referring to fig. 2 and 7, the projection barrel 100 of the present embodiment further includes a bayonet 30, where the bayonet 30 is detachably connected to the front end surface of the barrel body 10 and abuts against the light-receiving lens set 20 to fix the light-receiving lens set 20 to the mounting chamber 14. The bayonet 30 is provided with a light hole 311, and when the bayonet 30 is connected with the barrel body 10, the light hole 311 is opposite to the light receiving lens 22, so that light can smoothly pass through the projection barrel 100.

Specifically, referring to fig. 2 and 7, the bayonet member 30 includes a bayonet body 31 and a bayonet outer edge 32, and the bayonet outer edge 32 is disposed at one end of the bayonet body 31 and extends in a radial direction of the bayonet body 31. The bayonet outer edge 32 is provided with a plurality of through holes, and the screw 40 passes through the through holes on the bayonet outer edge 32 and then is connected to the screw hole on the cylinder body 10, thereby fixing the bayonet 30 to the front end surface of the cylinder body 10.

As shown in fig. 2, the outer side surface of the bayonet body 31 is convexly provided with a plurality of uniformly distributed locking blocks 312, and the locking blocks 312 are used for being matched with locking grooves on the photographic lamp so as to fix the photographic lamp on the projection cylinder 100.

In other embodiments, referring to fig. 7 and 9, the bayonet member 30 is provided with a fixing groove 34 on the end face facing the cartridge body 10, and the front end face of the cartridge body 10 facing the bayonet is provided with a fixing block 18. The fixing block 18 can be accommodated in the fixing groove 34, so that the bayonet piece 30 is abutted on the barrel main body 10 at a set angle. The fixing block 18 and the fixing groove 34 are provided, so that the bayonet fitting 30 can be quickly and accurately fixed on the front end surface of the cartridge body 10,

referring to fig. 2, 5 and 10, in the present embodiment, positioning ribs 23 are protruded on the outer sidewalls of the two ends of the housing 21. The bayonet component 30 and the barrel body 10 are convexly provided with a limiting rib matched with the positioning rib 23, and the limiting rib is abutted against the positioning rib 23 so as to fix the light-receiving lens group 20 in the mounting cavity 14 and limit the light-receiving lens group 20 to move along the axial direction of the barrel body 10.

Specifically, as shown in fig. 5, two light collecting lenses 22 having different radii are provided in the inner space of the housing 21. And the positioning rib 23 on the housing 21 includes a front positioning rib 231 and a rear positioning rib 232. The front positioning rib 231 is disposed at an end near the bayonet 30, and the rear positioning rib 232 is disposed at an end far from the bayonet 30.

As shown in fig. 7 and 10, a receiving groove is formed in a side of the bayonet body 31 of the bayonet 30 facing the cartridge body 10, and a second stopper rib 33 protruding in the axial direction of the bayonet 30 is provided in the receiving groove. When the bayonet 30 is connected to the front end surface of the barrel body 10, the second limiting rib 33 abuts against the front positioning rib 231 of the light receiving lens set 20 to limit the light receiving lens set 20 from moving out forward along the axis of the barrel body 10.

As shown in fig. 2 and 10, a fixing ring 50 is further disposed between the second limiting rib 33 and the front positioning rib 231 in the present embodiment, the fixing ring 50 is made of silica gel, and the fixing ring 50 is disposed on the contact surface between the second limiting rib 33 and the front positioning rib 231, so that the second limiting rib 33 on the bayonet component 30 can better contact the front positioning rib 231, and reduce the stress on the front positioning rib 231.

Referring to fig. 2 and 10, a first stopper rib 15 protruding toward the axis is provided on the inner side wall of the cartridge body 10. The first limiting rib 15 is provided with a protruding position 151 to form a positioning cavity for accommodating the rear positioning rib 232 on the housing 21, and an end surface of the rear positioning rib 232 abuts against an end surface of the protruding position 151 to limit the rear movement of the lens group 20 along the axis of the barrel body 10.

As shown in fig. 10, sealing grooves are formed on the outer sides of the front positioning rib 231 and the rear positioning mirror, and a silica gel gasket is arranged in the sealing grooves to radially fix the light collecting lens group 20 in the mounting cavity 14 of the cylinder body 10, so that the light collecting lens group 20 is more firmly mounted.

Referring to fig. 8 to 11, in other embodiments, a positioning structure is further provided on the projection tube 100 to further position the light-receiving lens set 20 and prevent the light-receiving lens set 20 from rotating in the tube main body 10.

As shown in fig. 8, 9, 12 and 15, a positioning plane 25 is provided at an end of the housing 21 of the lens group 20 facing the barrel body 10, and a positioning block 17 adapted to the positioning plane 25 is provided in the barrel body 10. When the light receiving lens set 20 is accommodated in the mounting cavity 14, the positioning block 17 abuts against the positioning plane 25, so that the light receiving lens set 20 is matched with the mounting cavity 14 in a positioning way, and rotation of the light receiving lens set 20 in the cylinder main body 10 is prevented.

As shown in fig. 8, the positioning plane 25 is provided on the rear positioning rib 232 of the housing 21. Correspondingly, as shown in fig. 9 and 11, the positioning block 17 in the barrel body 10 is disposed on the inner side wall of the positioning cavity of the first limiting rib 15 and protrudes toward the axial direction of the barrel body 10, so that the rear positioning rib 232 on the light-receiving lens group 20 can only be abutted with the positioning cavity on the first limiting rib 15 on the barrel body 10 at an angle. And the rear positioning rib 232 cannot rotate in the positioning cavity of the first limiting rib 15, so as to further position the light receiving lens group 20.

In summary, the first guiding portion 16 for guiding is disposed on the inner side wall of the mounting cavity 14 of the barrel body 10, the second guiding portion 24 matched with the first guiding portion 16 is disposed on the housing 21 of the light collecting lens set 20, and the second guiding portion 24 slides along the first guiding portion 16, so that the light collecting lens set 20 can slide into the mounting cavity 14 at a set path and a fixed angle, in this process, the light collecting lens set 20 cannot deviate, and after the light collecting lens set 20 is assembled, fine adjustment of the light collecting lens set 20 is not required. The operation is very simple and convenient, the working efficiency of replacing the light collecting lens group 20 is greatly improved, and the maintenance work of workers is also facilitated.

While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A projection drum, comprising:

the front end of the cylinder body is opened and is communicated with the internal space of the cylinder body, so that an installation cavity is formed at the front end of the cylinder body, a light outlet is formed in the rear end face of the cylinder body, and a light effect device for changing light effect is arranged in the internal space between the light outlet and the opening; a first guide part is arranged on the inner side wall of the cylinder main body corresponding to the installation cavity;

the light receiving lens group comprises a shell and a light receiving lens arranged on the shell, and a second guide part matched with the first guide part is arranged on the outer side surface of the shell; the light receiving lens group is installed into the installation cavity from the opening of the cylinder main body, the second guide part is connected with the first guide part in an adapting mode, the light receiving lens group is installed in the installation cavity at a fixed angle, light emitted by the photographic lamp enters from the opening, sequentially passes through the light receiving lens group in the installation cavity and light effect devices behind the installation cavity, and is emitted from the light outlet.

2. The projection tube of claim 1, wherein the first guide portion is a groove structure provided on an inner side wall of the tube body, the groove structure extending in an axial direction of the tube body; the second guide part is a boss structure protruding on the outer side wall of the shell, and the boss structure extends along the axial direction of the shell; the second guide part is matched with the first guide part.

3. The projection tube of claim 1, wherein the first guide portion is a boss structure provided on an inner side wall of the tube body and extends in an axial direction of the tube body; the second guide part is of a groove structure concavely arranged on the outer side wall of the shell and extends along the axial direction of the shell; the second guide part is matched with the first guide part.

4. The projection cartridge of claim 1, wherein the housing is provided with at least two of the second guides; part of the second guide parts are boss structures, and the rest of the second guide parts are groove structures; the boss structures and the groove structures are arranged at intervals along the circumferential direction of the shell;

the inner side wall of the cylinder main body is provided with a groove structure corresponding to the boss structure on the shell and a boss structure corresponding to the groove structure on the shell.

5. The projection cartridge of any of claims 2-4, wherein the cartridge body further comprises a connecting plate connected to an inner sidewall of the mounting chamber and a cap disposed on the connecting plate and protruding in an axial direction of the cartridge body, the first guide being disposed on a side of the cap facing away from the connecting plate.

6. The projection cartridge of claim 1, wherein a locating plane is provided on an end of the housing facing the cartridge body; the barrel body is internally provided with a positioning block matched with the positioning plane, and when the light collecting lens group is accommodated in the mounting cavity, the positioning block is abutted to the positioning plane, so that the light collecting lens group is abutted to the mounting cavity at a fixed angle.

7. The projection cartridge of claim 1, further comprising a bayonet fitting removably attached to a front face of the cartridge body and interfacing with the lens group to secure the lens group to the mounting chamber; the bayonet piece is provided with a light hole, the bayonet piece is connected with the cylinder main body, and the light hole is opposite to the light receiving lens.

8. The projection tube of claim 7, wherein a fixing groove is formed in an end surface of the bayonet piece facing the tube main body, a fixing block is formed in a front end surface of the tube main body facing the bayonet, and the fixing block is accommodated in the fixing groove so that the bayonet piece is abutted to the tube main body at a set angle.

9. The projection tube of claim 7, wherein positioning ribs are provided on the outer side walls of the two ends of the housing, and the bayonet component and the tube body are provided with limiting ribs matched with the positioning ribs, and the limiting ribs are abutted with the positioning ribs so as to axially fix the light receiving lens group in the mounting cavity.

10. The projection cartridge of claim 7, wherein the bayonet member comprises a bayonet body and a bayonet outer edge, the bayonet outer edge being disposed at one end of the bayonet body and extending radially of the bayonet body, the bayonet outer edge being provided with a plurality of through holes for connection with the cartridge body; the outer side surface of the bayonet body is convexly provided with a plurality of locking blocks which are uniformly distributed, and the locking blocks are used for being matched with locking grooves on the photographic lamp so as to fix the photographic lamp on the projection cylinder.