CN220438735U - Light receiving lens group and projection tube thereof - Google Patents

Abstract

The utility model provides a light-receiving lens group and a projection cylinder, wherein the light-receiving lens group is detachably arranged in the projection cylinder, and the light-receiving lens group comprises: the shell is provided with a front light receiving port and a rear light receiving port, and a light receiving channel is arranged between the front light receiving port and the front light receiving port; the inner side wall of the shell is provided with an assembly groove; the light receiving lens is arranged in the light receiving channel; the light receiving lens is arranged in the assembly groove; the light receiving lens comprises a front lens and a rear lens; the front lens is arranged at one end of the shell close to the front light receiving port, and the rear lens is arranged at one end of the shell close to the rear light receiving port; the shell comprises a first shell and a second shell which are arranged up and down, the first shell and the second shell are detachably installed and fixed, and the light-receiving lens is detachably installed in the assembly groove through the first shell and the second shell. The utility model can facilitate the replacement and maintenance operation of the light receiving lens when the light receiving lens is cracked due to heating, thereby improving the replacement and maintenance efficiency of the light receiving lens.

Description

Light receiving lens group and projection tube thereof

Technical Field

The utility model relates to the technical field of photographic instruments, in particular to a light-receiving lens group and a projection cylinder thereof.

Background

In order to realize what kind of photographic light efficiency, more and more people can install projection section of thick bamboo additional on the photographic lamp, can produce various corresponding light efficiency after the light that the photographic lamp penetrated projection section of thick bamboo and projection film to satisfy different photographic demands. With the increasing power of the photography lamp, the temperature generated by the photography lamp is higher, and the lens in the lens group is required to be replaced because the lens group is relatively close to the photography lamp after the projection tube is assembled on the photography lamp, so that the lens in the lens group can be cracked due to the heat after long-term use.

When the lenses in the existing light receiving lens set are heated to crack, the lenses cannot be directly detached from the light receiving lens set for replacement, and the lenses need to be detached together with other parts, so that the dismounting work of the lenses is complicated, and the replacement and maintenance efficiency of the lenses in the light receiving lens set are affected.

Disclosure of Invention

The utility model aims to provide a light receiving lens group and a projection tube thereof, so as to optimize the structure of the light receiving lens group of the projection tube in the related technology and improve the replacement and maintenance efficiency of the light receiving lens in the projection tube.

In order to solve the above technical problems, the present utility model provides a light-receiving lens set, which includes: the shell is provided with a front light receiving port and a rear light receiving port, and a light receiving channel is arranged between the front light receiving port and the front light receiving port; an assembly groove is formed in the inner side wall of the light receiving channel; the light receiving lens is arranged in the light receiving channel so that an external light source can pass through the light receiving lens; the light receiving lens is detachably arranged in the assembly groove; the light receiving lens comprises a front lens and a rear lens; the front lens is arranged at one end of the shell, which is close to the front light receiving opening, and the rear lens is arranged at one end of the shell, which is close to the rear light receiving opening; the shell comprises a first shell and a second shell which are arranged up and down, wherein the first shell and the second shell are detachably installed and fixed, so that the light collecting lens is detachably installed between the first shell and the second shell.

Optionally, a first bolt hole is formed in the first shell; a second bolt hole is formed in the second shell; when the first housing is mounted on the second housing, the first bolt hole and the second bolt hole correspond, and the first housing and the second housing are bolt-fixed through the first bolt hole and the second bolt hole.

Optionally, the assembly groove comprises a first mounting groove and a second mounting groove; the first mounting groove is arranged at one end of the shell, which is close to the light inlet, and the front lens is detachably mounted on the shell through the first mounting groove; the second mounting groove is arranged at one end of the shell, which is close to the light outlet; the rear lens is detachably mounted on the housing through the second mounting groove.

Optionally, the shell is the toper structure, the shell is close to the width of preceding receipts light mouth one end is less than the shell is close to the width of back receipts light mouth one end.

According to one aspect of the present utility model, there is provided a projection barrel, the projection barrel including a body having a light inlet and a light outlet, the light inlet being connectable to an external light source, an optical channel being provided between the light inlet and the light outlet; the accommodating cavity is arranged at one end of the optical channel, which is close to the light inlet; the light receiving lens set is detachably mounted in the accommodating cavity, and the light receiving lens set can be detached from the accommodating cavity through the light inlet.

Optionally, a first guiding part is arranged on the outer wall of the shell; the inner side wall of the accommodating cavity is provided with a second guide part matched with the first guide part; when the light receiving lens group is installed in the accommodating cavity, the first guide part and the second guide part can be matched and clamped with each other.

Optionally, a first protruding strip protruding outwards is arranged at the edge of the lower end of the first shell, and the first protruding strip extends along the front-back direction; the upper end edge of the second shell is provided with a second raised line protruding outwards, and the second raised line extends along the front-rear direction; when the first shell is mounted on the second shell, the lower ends of the first raised strips and the upper ends of the second raised strips are attached to each other to form the first guide part.

Optionally, a limit groove is arranged between the second guide part and the inner side wall of the accommodating cavity; when the light collecting lens group is installed in the accommodating cavity, the first raised strips and the second raised strips can extend into the limiting grooves.

Optionally, a first groove concaved inwards is formed at the edge of the lower end of the first shell, and the first groove extends along the front-back direction; the upper end edge of the second shell is provided with a second groove concaved inwards, and the second groove extends along the front-back direction; when the first shell is mounted on the second shell, the first groove and the second groove are attached to form the first guide part.

Optionally, the second guiding part is convexly arranged on the inner side wall of the accommodating cavity; when the light receiving lens group is installed in the accommodating cavity, the second guide part can extend into the first groove and the second groove.

As can be seen from the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:

the utility model provides a light-receiving lens group and a projection cylinder thereof, wherein a light-receiving channel is arranged in a shell, an assembly groove is formed in the inner side wall of the light-receiving channel, and the light-receiving lens is arranged in the light-receiving channel, so that the light-receiving lens is arranged in the assembly groove; simultaneously, utilize the shell to include first casing and the second casing of arranging from top to bottom, demountable installation is fixed between first casing and the second casing, so that the light receiving lens passes through first casing and second casing detachably installs in the assembly groove, thereby when the light receiving lens in the light receiving lens group is heated and takes place the fracture, only need dismantle first casing from the second casing, can make the light receiving lens can dismantle from the assembly inslot, thereby make the change and the maintenance operation of light receiving lens more convenient, and then improved the change and the efficiency of maintenance of light receiving lens.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of the projection cartridge of fig. 1.

Fig. 3 is a schematic structural view of the lens assembly of fig. 2.

Fig. 4 is an exploded view of the lens group.

Fig. 5 is a cross-sectional view of the lens group.

Fig. 6 is a schematic front view of the projection cartridge of fig. 1.

Fig. 7 is a schematic view of the structure of the installation of the lens group in fig. 3.

Fig. 8 is a schematic structural diagram of the lens assembly of fig. 3 in another embodiment.

Fig. 9 is an exploded view of fig. 8.

Fig. 10 is a schematic structural diagram of a further embodiment of the lens assembly of fig. 3.

Fig. 11 is an exploded view of fig. 10.

Fig. 12 is a schematic view of the structure of the second guiding portion in fig. 6 in yet another embodiment.

The reference numerals are explained as follows: 100. a projection cylinder; 1. a body; 11. a light inlet; 12. a light outlet; 13. an optical channel; 14. a front housing assembly; 15. a rear housing assembly; 16. a receiving chamber; 161. a second guide part; 1611. a limit groove; 1612. a limit column; 20. an optical lens group; 30. a light receiving lens group; 31. a housing; 311. a first guide part; 3111. a bump; 312. a first housing; 3121. the first clamping protrusion; 3122. a first bolt hole; 3123. a first protruding strip; 3124. a first groove; 313. a second housing; 3131. the second clamping protrusion; 3132. a second bolt hole; 3133. a second protruding strip; 3134. a second groove; 314. a first mounting groove; 3141. a first sub-tank; 3142. a second sub-tank; 315. a second mounting groove; 3151. a third sub-tank; 3152. a fourth sub-tank; 316. a front light receiving port; 317. a rear light receiving port; 318. a light receiving channel; 32. a light receiving lens; 321. a front lens; 322. a rear lens; 40. a light-cutting lens group; 50. and a light output lens group.

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.

When the lenses in the existing light receiving lens set are heated to crack, the lenses cannot be directly detached from the light receiving lens set for replacement, and the lenses need to be detached together with other parts, so that the dismounting work of the lenses is complicated, and the replacement and maintenance efficiency of the lenses in the light receiving lens set are affected.

FIG. 1 is a schematic diagram of an embodiment of the present utility model. Fig. 2 is a schematic cross-sectional view of the projection cartridge 100 of fig. 1. Fig. 3 is a schematic structural view of the lens unit 30 in fig. 2.

Referring to fig. 1 to 3, a projection barrel 100 provided by the present utility model mainly includes a main body 1 and an optical lens assembly 20. The optical lens assembly 20 is disposed in the main body 1, and adjusts the light emitted by the photographing lamp to achieve the required light effect.

Referring to fig. 1 and 2, in some embodiments, a main body 1 is cylindrical, two ends of the main body 1 are respectively provided with a light inlet 11 and a light outlet 12, the light inlet 11 can be connected with an external photography lamp, an optical channel 13 is arranged between the light inlet 11 and the light outlet, the optical channel 13 is arranged in an internal cavity of the main body 1, so that light emitted by the photography lamp 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.

Referring to fig. 2, in some embodiments, the body 1 includes a front housing assembly 14 and a rear housing assembly 15. The front shell assembly 14 and the rear shell assembly 15 are slidably connected, the rear shell assembly 15 is provided at the rear end of the front shell assembly 14, and the rear shell assembly 15 is retractable at the rear end of the front shell assembly 14.

In some embodiments, an optical lens is disposed in the optical channel 13 in the rear housing assembly 15, the front housing assembly 14 stretches and contracts in the rear housing assembly 15, so that the horizontal position of the optical lens is changed, the relative position of the optical lens and the light receiving lens set 30 in the rear housing assembly 15 is changed, and further the focal length of the projection tube 100 is changed, so that the light effect distance projected by the projection tube 100 can be changed to adapt to different application environments.

Referring to fig. 2, in some embodiments, a receiving cavity 16 is disposed at the front end of the body 1, the receiving cavity 16 is disposed in the optical channel 13 and is disposed at one end of the optical channel 13 near the light inlet 11, and the receiving cavity 16 is communicated with the optical channel 13, so that the photography lamp can sequentially pass through the light inlet 11, the receiving cavity 16, the optical channel 13 and the light outlet 12, thereby ensuring the use of the projection tube 100.

Referring to fig. 2 and 3, in some embodiments, the optical lens set 20 includes a light receiving lens set 30, a light cutting lens set 40, and a light exiting lens set 50. The light receiving lens group 30, the light cutting lens group 40, and the light exiting lens group 50 are sequentially disposed along the optical path. And the light receiving lens set 30, the light cutting lens set 40 are disposed in the optical channel 13 of the front housing assembly 14, and the light exiting lens set 50 is disposed in the optical channel 13 of the rear housing assembly 15. The lens group 40 separates the internal cavity on the front housing assembly 14 such that the lens group 30 is disposed on the front side of the lens group 40.

Fig. 4 is an exploded view of the light receiving lens group 30. Fig. 5 is a sectional view of the light receiving lens group 30.

Referring to fig. 2 to 5, the light receiving lens assembly 30 is disposed at one end of the optical channel 13 near the light inlet 11, i.e. the light receiving lens assembly is self-installed in the accommodating cavity 16. The light receiving lens group 30 can be detachably mounted with the accommodating cavity 16, and the light receiving lens group 30 can be detached from the accommodating cavity 16 through the light inlet 11, so that when the light receiving lens group 30 needs to be replaced and maintained, only the light receiving lens group 30 needs to be detached, and the disassembly of other components is not needed, so that the replacement and maintenance operation is more convenient, and the replacement and maintenance efficiency of the light receiving lens group 30 is improved.

Referring to fig. 5, in some embodiments, the lens assembly 30 includes a housing 31 and a lens 32. The casing 31 is provided with a front light receiving port 316 and a rear light receiving port 317, and a light receiving channel 318 is provided between the front light receiving port 316 and the rear light receiving port 317. The light receiving lens 32 is installed in the light receiving channel 318, so that an external light source can be emitted into the light receiving channel 318 from the front light receiving port 316 through the light inlet 11, and then emitted from the rear light receiving port 317 and the light outlet 12 after passing through the light receiving lens 32.

Referring to fig. 3 to 5, in some embodiments, the housing 31 has a tapered shell structure with front and rear openings, so that the light receiving channel 318 is also tapered, and the width of the end of the housing 31 near the front light receiving opening 316 is smaller than the width of the end of the housing 31 near the rear light receiving opening 317, i.e. the width of the housing 31 gradually increases along the optical path.

It should be noted that, in other embodiments, the housing 31 may also have a cylindrical shape or other structures.

Referring to fig. 2-5, in some embodiments, the collection optic 32 includes a front optic 321 and a rear optic 322. The front lens 321 is disposed at one end of the housing 31 near the light inlet 11, the rear lens 322 is disposed at one end of the housing 31 near the light outlet 12, and the light incident on the projection tube 100 from the photography lamp passes through the front lens 321 and then is emitted from the rear lens 322.

Referring to fig. 4 and 5, in some embodiments, the width of the front lens 321 is smaller than the width of the rear lens 322. The front lens 321 and the rear lens 322 are convex lenses and are convex backward, and the radius of curvature of the outer surface of the front lens 321 is larger than that of the outer surface of the rear lens 322, i.e. the focal length of the front lens 321 is larger than that of the rear lens 322.

Fig. 6 is a schematic front view of the projection cylinder 100 in fig. 1.

Referring to fig. 3 to 6, in some embodiments, a first guiding portion 311 is provided on an outer wall of the housing 31, and the first guiding portion 311 extends in a front-rear direction. The side wall of the accommodating cavity 16 is provided with a second guiding part 161 matched with the first guiding part 311. When the light collecting lens set 30 is installed in the accommodating cavity 16, the first guiding portion 311 on the housing 31 can cooperate with the second guiding portion 161 to achieve guiding effect, so that the light collecting lens set 30 is limited and fixed in the accommodating cavity 16, and the installation stability of the light collecting lens set 30 is improved.

In some embodiments, the first guiding portion 311 is a protruding block 3111 protruding on the outer wall of the housing 31, the second guiding portion 161 is formed with a limiting slot 1611 on the inner side wall of the accommodating cavity 16, when the light collecting lens set 30 is installed in the accommodating cavity 16, the protruding block 3111 on the housing 31 can slide into the limiting slot 1611 on the inner side wall of the accommodating cavity 16, so that the light collecting lens set 30 is limited and fixed in the accommodating cavity 16, and the installation stability of the light collecting lens set 30 is improved.

The first guide portions 311 may be provided in plural numbers, and the plural first guide portions 311 may be arranged at intervals on the outer wall of the housing 31. The number of the second guide portions 161 may be plural, and the second guide portions 161 are disposed in one-to-one correspondence with the first guide portions 311.

Referring to fig. 4, in some embodiments, the housing 31 includes a first housing 312 and a second housing 313, the first housing 312 and the second housing 313 are disposed above each other, and the first housing 312 is disposed above the second housing 313, and a lower end of the first housing 312 is connected to an upper end of the second housing 313 to form the housing 31.

In some embodiments, the first housing 312 and the second housing 313 are removably secured therebetween. Specifically, the first housing 312 is provided with a first bolt hole 3122, and the second housing 313 is provided with a second bolt hole 3132. When the first housing 312 is mounted on the second housing 313, the first bolt holes 3122 and the second bolt holes 3132 correspond such that the first housing 312 and the second housing 313 are bolt-fixed through the first bolt holes 3122 and the second bolt holes 3132. Therefore, when the light receiving lens 32 needs to be disassembled, the light receiving lens 32 can be taken out from the light receiving lens group 30 only by opening the first shell 312, so as to realize replacement and maintenance of the light receiving lens 32; the replacement and maintenance operation is very simple, other parts cannot be involved in the replacement and maintenance operation process, the operation is very simple and convenient, and the replacement and maintenance efficiency of the light receiving lens 32 is greatly improved.

Referring to fig. 4 to 6, in some embodiments, a first protruding portion 3121 is protruding outward from a lower end edge of the first housing 312, a second protruding portion 3131 is protruding outward from an upper end edge of the second housing 313, when the first housing 312 is mounted on the second housing 313, the first protruding portion 3121 and the second protruding portion 3131 are integrally attached as a protruding portion 3111, and the protruding portion 3111 can extend into the limiting groove 1611 of the accommodating cavity 16 when the light collecting lens 30 is mounted in the accommodating cavity 16, so that the housing 31 is fixed in a limiting manner in the accommodating cavity 16, and the light collecting lens 30 is fixed in a limiting manner in the accommodating cavity 16, thereby improving the mounting stability of the light collecting lens 30.

In some embodiments, a first bolt hole 3122 is provided on first snap tab 3121 and a second bolt hole 3132 is provided on second snap tab 3131. When the first housing 312 is mounted on the second housing 313, the first bolt holes 3122 and the second bolt holes 3132 correspond such that the first housing 312 and the second housing 313 are bolt-fixed through the first bolt holes 3122 and the second bolt holes 3132.

Fig. 7 is a schematic view of a structure in which the lens group 30 of fig. 3 is mounted.

Referring to fig. 5 and 7, in some embodiments, an inner sidewall of the housing 31 is provided with a fitting groove, and the light receiving lens 32 is installed in the housing 31 through the fitting groove.

In some embodiments, the assembly groove includes a first mounting groove 314, the first mounting groove 314 is disposed on an inner sidewall of the housing 31, the first mounting groove 314 is annular, and the first mounting groove 314 is disposed around one end near the front light receiving opening 316. The first mounting groove 314 is formed by a first sub groove 3141 and a second sub groove 3142, wherein the first sub groove 3141 is arranged at one end of the first housing 312 near the front light receiving opening 316, and the second sub groove 3142 is arranged at one end of the second housing 313 near the front light receiving opening 316. When the first housing 312 is fixedly mounted to the second housing 313, the first and second sub-grooves 3141 and 3142 communicate and form the first mounting groove 314,

in some embodiments, the assembly groove further includes a second mounting groove 315, where the second mounting groove 315 is disposed on an inner sidewall of the housing 31, the second mounting groove 315 is annular, and the second mounting groove 315 is disposed around one end near the rear light receiving opening 317. The second mounting groove 315 is formed by a third sub groove 3151 and a fourth sub groove 3152, wherein the third sub groove 3151 is arranged at one end of the first housing 312 near the rear light receiving opening 317, and the fourth sub groove 3152 is arranged at one end of the second housing 313 near the rear light receiving opening 317. When the first housing 312 is fixedly mounted with the second housing 313, the third sub-groove 3151 and the fourth sub-groove 3152 communicate and form a second mounting groove 315.

In some embodiments, when the front lens 321 and the rear lens 322 are mounted, the lower end of the front lens 321 is first mounted in the second sub-groove 3142, the lower end of the rear lens 322 is mounted in the fourth sub-groove 3152, thereby primarily mounting the front lens 321 and the rear lens 322 in the second housing 313, the upper end of the front lens 321 is mounted in the first sub-groove 3141, and the upper end of the rear lens 322 is mounted in the third sub-groove 3151, thereby completely mounting the front lens 321 in the first sub-groove 3141 and the second sub-groove 3142 when the first housing 312 is fixedly mounted with the second housing 313, thereby mounting the front lens 321 in the first mounting groove 314, thereby mounting the front lens 321 in the end of the housing 31 near the light inlet 11 through the first mounting groove 314. The rear lens 322 is completely mounted in the third and fourth sub-grooves 3151 and 3152 such that the rear lens 322 is mounted in the second mounting groove 315, thereby mounting the rear lens 322 at an end of the housing 31 near the light outlet 12 through the second mounting groove 315.

Fig. 8 is a schematic structural diagram of the lens assembly 30 in fig. 3 in another embodiment. Fig. 9 is an exploded view of fig. 8.

Referring to fig. 8 and 9, in some embodiments, in order to further improve the stability of the installation of the light receiving lens assembly 30, the first protruding portion 3121 of the first housing 312 and the second protruding portion 3131 of the second housing 313 may be replaced, that is, a first protruding portion 3123 is protruding outward from a lower end edge of the first housing 312, and the first protruding portion 3123 extends along a lower end edge of the first housing 312, that is, extends along a front-rear direction. A second protrusion 3133 is protruded outward from an upper end edge of the second housing 313, and the second protrusion 3133 extends along the upper end edge of the second housing 313, i.e., in the front-rear direction. When the first housing 312 is mounted on the second housing 313, the lower ends of the first protrusions 3123 and the upper ends of the second protrusions 3133 are bonded, so that the first protrusions 3123 and the second protrusions 3133 are integrated and serve as the first guide 311. Therefore, the first raised strips 3123 and the second raised strips 3133 extend into the limit groove 1611 of the accommodating cavity 16, so that the housing 31 is limited and fixed in the accommodating cavity 16, and the light receiving lens set 30 is limited and fixed in the accommodating cavity 16, thereby further improving the installation stability of the light receiving lens set 30.

Fig. 10 is a schematic structural diagram of the lens assembly 30 in fig. 3 in yet another embodiment. Fig. 11 is an exploded view of fig. 10. Fig. 12 is a schematic view of the structure of fig. 6 in yet another embodiment.

Referring to fig. 10 to 12, in some embodiments, in order to further improve the stability of the installation of the light receiving lens set 30, the first protruding portion 3121 of the first housing 312 and the second protruding portion 3131 of the second housing 313 may be replaced, that is, a first groove 3124 is concavely formed on the lower end edge of the first housing 312 inward, and the first groove 3124 extends along the lower end edge of the first housing 312, that is, extends in the front-rear direction. A second groove 3134 is concavely provided inward at an upper end edge of the second housing 313, and the second groove 3134 extends along the upper end edge of the second housing 313, i.e., in the front-rear direction. When the first housing 312 is mounted on the second housing 313, the first groove 3124 communicates integrally with the second groove 3134, so that the first groove 3124 and the second groove 3134 together function as the first guide 311. The inside wall of the accommodating cavity 16 is provided with a limiting column 1612 protruding inwards, the limiting column 1612 is used as a second guiding part 161, when the light receiving lens set 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 shell 31 is limited and fixed in the accommodating cavity 16, and further the light receiving lens set 30 is limited and fixed in the accommodating cavity 16, and the installation stability of the light receiving lens set 30 is further improved.

In some embodiments, the first bolt hole 3122 may be mounted on an outer wall of the first housing 312, and the second bolt hole 3132 is mounted on an upper end of the second housing 313, so long as the first bolt hole 3122 and the second bolt hole 3132 correspond when the first housing 312 is mounted on the second housing 313.

As can be seen from the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:

the utility model provides a light-receiving lens group 30 and a projection tube 100 thereof, wherein a light-receiving channel 318 is arranged in a shell 31, an assembly groove is formed on the inner side wall of the light-receiving channel 318, and a light-receiving lens 32 is arranged in the light-receiving channel 318, so that the light-receiving lens 32 is arranged in the assembly groove; meanwhile, the casing 31 comprises a first shell 312 and a second shell 313 which are arranged up and down, the first shell 312 and the second shell 313 are detachably mounted and fixed, so that the light collecting lens 32 is detachably mounted in the assembly groove through the first shell 312 and the second shell 313, when the light collecting lens 32 in the light collecting lens group 30 is heated to crack, the light collecting lens 32 can be detached from the assembly groove only by detaching the first shell 312 from the second shell 313, and the replacement and maintenance operation of the light collecting lens 32 are more convenient, and the replacement and maintenance efficiency of the light collecting lens 32 is improved.

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 lens assembly detachably mountable in a projection cartridge, comprising:

the shell is provided with a front light receiving port and a rear light receiving port, and a light receiving channel is arranged between the front light receiving port and the rear light receiving port; an assembly groove is formed in the inner side wall of the shell;

the light receiving lens is arranged in the light receiving channel so that an external light source can pass through the light receiving lens; the light receiving lens is arranged in the assembly groove; the light receiving lens comprises a front lens and a rear lens; the front lens is arranged at one end of the shell, which is close to the front light receiving opening, and the rear lens is arranged at one end of the shell, which is close to the rear light receiving opening;

the shell comprises a first shell and a second shell which are arranged up and down, wherein the first shell and the second shell are detachably installed and fixed, so that the light-receiving lens is detachably installed in the assembly groove through the first shell and the second shell.

2. The lens set according to claim 1, wherein the first housing is provided with a first bolt hole;

a second bolt hole is formed in the second shell;

when the first housing is mounted on the second housing, the first bolt hole and the second bolt hole correspond, and the first housing and the second housing are bolt-fixed through the first bolt hole and the second bolt hole.

3. The lens set of claim 1, wherein the mounting groove comprises a first mounting groove and a second mounting groove;

the first mounting groove is arranged at one end of the shell, which is close to the front light receiving opening, and the front lens is detachably mounted on the shell through the first mounting groove;

the second mounting groove is arranged at one end of the shell, which is close to the rear light receiving opening; the rear lens is detachably mounted on the housing through the second mounting groove.

4. The lens of claim 1, wherein the housing has a tapered configuration, and a width of the housing near the front light receiving port is smaller than a width of the housing near the rear light receiving port.

5. A projection drum, comprising:

the light source comprises a body, wherein a light inlet and a light outlet are formed in the body, the light inlet can be connected with an external light source, and an optical channel is arranged between the light inlet and the light outlet;

the accommodating cavity is arranged at one end of the optical channel, which is close to the light inlet;

a light collecting lens set, which adopts the light collecting lens set as claimed in any one of claims 1 to 4, wherein the light collecting lens set is detachably arranged in the accommodating cavity, and the light collecting lens set can be detached from the accommodating cavity through the light inlet.

6. The projection cartridge of claim 5, wherein a first guide is provided on an outer wall of the housing;

the inner side wall of the accommodating cavity is provided with a second guide part matched with the first guide part;

when the light receiving lens group is installed in the accommodating cavity, the first guide part and the second guide part can be matched and clamped with each other.

7. The projection tube of claim 6, wherein the lower end edge of the first housing is provided with a first protrusion protruding outward, the first protrusion extending in the front-rear direction;

the upper end edge of the second shell is provided with a second raised line protruding outwards, and the second raised line extends along the front-rear direction;

when the first shell is mounted on the second shell, the lower ends of the first raised strips and the upper ends of the second raised strips are attached to each other to form the first guide part.

8. The projection cartridge of claim 7, wherein a limiting groove is provided between the second guide portion and an inner sidewall of the receiving chamber;

when the light collecting lens group is installed in the accommodating cavity, the first raised strips and the second raised strips can extend into the limiting grooves.

9. The projection cartridge of claim 6, wherein a lower end edge of the first housing is provided with a first groove recessed inward, the first groove extending in a front-rear direction;

the upper end edge of the second shell is provided with a second groove concaved inwards, and the second groove extends along the front-back direction;

when the first shell is mounted on the second shell, the first groove and the second groove are attached to form the first guide part.

10. The projection cartridge of claim 9, wherein the second guide portion is protruding on an inner sidewall of the receiving chamber;

when the light receiving lens group is installed in the accommodating cavity, the second guide part can extend into the first groove and the second groove.