Projector lens structure and projection equipment
By introducing staggered optical path channels and reflector assemblies into the projector lens, the problem of excessive size caused by vertical stacking of ultra-short-throw lenses is solved, achieving a more compact lens structure and improved space utilization, making it suitable for scenarios such as home theaters and educational projection.
Patent Information
- Application Number
- CN202520779856.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-22
AI Technical Summary
Existing ultra-short focal length lenses are limited by optical design and physical structure, resulting in the lens group being stacked longitudinally along the optical axis. This causes the physical length of the device in a certain direction to be greater than its lateral dimension, which limits the installation and use of the device in space-constrained scenarios.
By employing staggered optical path channels and mirror assemblies, and by setting multiple optical path channels inside the housing and using mirrors to fold the light direction into different directions, the stacking of lens groups in a single direction is reduced, thus achieving a compact lens structure.
It effectively shortens the physical length of the lens in the depth dimension, improves space utilization, solves the installation limitations of the equipment in a compact space, and at the same time ensures image quality.
Smart Images
Figure CN223955948U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a projection equipment technical field, especially a projector lens structure and projection equipment. BACKGROUND
[0002] The ultra-short focus projector can project a large size picture in a short projection distance, and the installation distance is shorter than that of the long focus projector when projecting the same size picture, so that the user is avoided from being blocked by the projection light and the projection light is avoided from directly shining on the human eye, and the interactive projection is more feasible.
[0003] The existing ultra-short focus lens is limited by optical design and physical structure, and the lens group often needs to be vertically stacked and arranged along the optical axis direction, so that the physical length of the equipment in the extension direction of the optical axis is greater than the transverse dimension. This long strip structure feature requires a large space in a certain direction when installing the equipment, and in the application scenarios of home theater, education projection and the like, when the distance between the wall surface and the projection surface is limited, the installation angle needs to be adjusted or part of the projection size needs to be sacrificed. In addition, the excessive size in a certain direction also limits the installation of the equipment in a compact space. SUMMARY
[0004] The main purpose of the utility model is to provide a projector lens structure and projection equipment, which aims to solve the problem of excessive size in a certain direction of the existing projector lens structure.
[0005] To achieve the above purpose, the utility model provides a projector lens structure, which comprises:
[0006] A shell having a light inlet and a light outlet, the light inlet and the light outlet are arranged staggered, three light path channels are formed in the shell, the three light path channels comprise a first light path channel, a second light path channel and a third light path channel, the extension directions of every two adjacent light path channels are intersected, and the ports of the first light path channel and the third light path channel form the light inlet and the light outlet respectively;
[0007] A lens assembly comprising a plurality of lenses, the plurality of lenses are distributed in the first light path channel and the second light path channel; and
[0008] A mirror assembly arranged in at least part of the light path channel, used to change the refraction direction of the light after the light enters.
[0009] In an embodiment, the two mirrors include a first mirror and a second mirror, the first mirror is obliquely arranged at the joint of the first light path channel and the second light path channel, the second mirror is arranged at the joint of the second light path channel and the third light path channel, and the reflecting surfaces of the first mirror and the second mirror are oppositely arranged.
[0010] In an embodiment, the housing includes:
[0011] a first housing, a cavity is formed inside the first housing, the cavity includes a first accommodating cavity and a second accommodating cavity which are in communication with each other, the first accommodating cavity extends in the up-down direction and a lower wall surface is arranged through the first housing to form the light inlet, the first accommodating cavity forms the first light path channel, and the second accommodating cavity extends in the left-right direction and a wall surface is arranged through the first housing; and
[0012] a second housing, arranged at the right side of the first housing and connected with the first housing, the second housing has a third accommodating cavity which is open towards the first housing, the third accommodating cavity is in communication with the second accommodating cavity, and a wall surface of the third accommodating cavity in the front-back direction or in the up-down direction is provided with the light outlet, so that the light outlet and the corresponding side wall of the third accommodating cavity jointly define the third light path channel, and the remaining part of the third accommodating cavity jointly forms the second light path channel with the second accommodating cavity;
[0013] wherein the first mirror is arranged in the first housing and the second mirror is arranged in the second housing.
[0014] In an embodiment, the first housing includes:
[0015] a mounting seat, a left end wall of the mounting seat is provided for mounting the first mirror, the mounting seat has the second accommodating cavity, and a right end wall of the mounting seat is connected with the second housing; and
[0016] a mounting cylinder, the mounting cylinder is arranged through in the up-down direction to form the first accommodating cavity, a lower end port of the mounting cylinder forms the light inlet, and an upper end of the mounting cylinder is connected with a lower side wall of the mounting seat.
[0017] In an embodiment, the left end wall of the mounting seat is obliquely arranged from left to right and upwards to form an oblique surface, a mounting hole is arranged on the oblique surface, and the reflecting surface of the first mirror corresponds to the mounting hole.
[0018] In an embodiment, the first housing further includes a mirror seat, the mirror seat is arranged on the mounting hole, and a side wall of the mirror seat towards the mounting hole is recessed inwardly to form a groove for accommodating the first mirror.
[0019] In an embodiment, the mounting base is fixedly connected with the mirror base by screwing; and / or,
[0020] The mirror base is further provided with a plurality of positioning holes, and the left end wall of the mounting base is correspondingly provided with a plurality of positioning columns which can be inserted into the plurality of positioning holes.
[0021] In an embodiment, the light inlet and the light outlet are staggered in the left-right direction, both extend in the up-down direction, and the light inlet and the light outlet are in the same direction or opposite directions; or,
[0022] The light inlet and the light outlet are staggered in the left-right direction, the light inlet extends in the up-down direction, and the light outlet extends in the front-back direction.
[0023] In an embodiment, the plurality of lenses include a front group lens set and a rear group lens set, the front group lens set is arranged in the second light path channel, and the rear group lens set is arranged in the first light path channel.
[0024] The utility model also provides a kind of projection equipment, including the projector lens structure as above, the projector lens structure includes:
[0025] Shell, the shell has light inlet and light outlet, the light inlet and the light outlet are staggered, the shell is formed with three light path channels that are sequentially communicated inside, three the light path channels include first light path channel, second light path channel and third light path channel, the extension direction of each adjacent two light path channels is crossed, and the port of first light path channel and third light path channel forms light inlet and light outlet respectively;
[0026] Lens assembly, including a plurality of lenses, and a plurality of lenses are distributed in first light path channel and second light path channel;And,
[0027] Mirror assembly is arranged in at least part of the light path channel, to change the refractive direction of light after light enters.
[0028] In the technical solution of this utility model, by placing the reflector assembly in the optical path channel inside the housing, the extension directions of adjacent optical path channels intersect. That is, the optical path channels no longer extend in the same direction, but are decomposed into multiple channels in different directions, making the overall lens structure more compact. Multiple optical path channels can distribute the lens group, which originally extended in a single direction, to other directions, significantly shortening the physical length of the lens in the depth dimension and alleviating the installation limitations of traditional long and narrow structures. Simultaneously, the introduction of the reflector allows the lens group to work collaboratively on non-linear paths, maintaining the total optical path length to ensure image quality while improving space utilization through multi-directional arrangement. The projector lens structure provided by this utility model can change the shape of the projector lens, reducing or adjusting its dimensions, saving or adjusting the structural space occupied by the projector lens. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0030] Figure 1 A schematic diagram of an embodiment of the projector lens structure provided by this utility model;
[0031] Figure 2 for Figure 1 A schematic diagram of the projector lens structure from another perspective;
[0032] Figure 3 for Figure 2 A cross-sectional view of the projector lens structure along AA;
[0033] Figure 4 for Figure 1 A schematic diagram of the structure of the central reflector mount.
[0034] Explanation of icon numbers:
[0035] 1000. Projector lens structure; 1. Housing; 11. Light inlet; 12. Light outlet; 13. First housing; 14. Mounting base; 141. Second accommodating cavity; 142. Left end wall; 143. Right end wall; 144. Lower side wall; 15. Mounting cylinder; 151. First accommodating cavity; 16. Second housing; 161. Third accommodating cavity; 17. Mirror mount; 171. Positioning hole; 2. Optical path channel; 21. First optical path channel; 22. Second optical path channel; 23. Third optical path channel; 3. Mirror assembly; 31. First mirror; 32. Second mirror.
[0036] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION
[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0038] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.
[0039] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one feature. In addition, if "and / or" or "and / or" appears in the whole text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0040] The ultra-short focus projector can project a large-size picture in a short projection distance, and the installation distance is shorter than that of the long-focus projector when projecting the same size picture, so that the user is avoided from being blocked by the projection light and the projection light is avoided from directly shining on the human eye, and the interactive projection is more feasible.
[0041] The existing ultra-short focus lens is limited by optical design and physical structure, and the lens group is often arranged in a vertical stacking direction along the optical axis, resulting in that the physical length of the device in the extension direction of the optical axis is greater than the transverse dimension. This long strip structure feature requires a large space in a certain direction when the device is installed, and in the application scenarios of home theater and education projection, when the distance between the wall and the projection surface is limited, the installation angle needs to be adjusted or part of the projection size needs to be sacrificed. In addition, the excessive size in a certain direction also limits the installation of the device in a compact space.
[0042] The main purpose of the utility model is a projector lens structure and projection equipment, aiming at solving the problem of excessive size of the projector lens structure in a certain direction.
[0043] Please refer to Figures 1 to 3 To achieve the above purpose, the utility model provides a projector lens structure 1000, the projector lens structure 1000 includes a shell 1, a lens assembly and a mirror assembly 3, the shell 1 has a light inlet 11 and a light outlet 12, the light inlet 11 and the light outlet 12 are staggered, three light path channels 2 are formed in the shell 1 and are communicated in sequence, three light path channels 2 include first light path channel 21, second light path channel 22 and third light path channel 23, the extension direction of every adjacent two light path channels 2 is intersected, and the port of first light path channel 21 and third light path channel 23 forms light inlet 11 and light outlet 12 respectively;The lens assembly includes a plurality of lenses, and a plurality of lenses are distributed in first light path channel 21 and second light path channel 22;The mirror assembly 3 is arranged in at least part of the light path channel 2 to change the propagation direction of light after entering.
[0044] In the technical scheme of the utility model, the mirror assembly 3 is arranged in the light path channel 2 inside the shell 1, so that the extension direction of adjacent light path channels 2 is intersected, that is, the light path channel 2 is no longer extended in the same direction, but is decomposed into multiple channels in different directions, so that the overall lens structure is more compact. Multiple light path channels 2 can distribute the lens group originally extended in a single direction to other directions, greatly shorten the physical length of the lens in the longitudinal dimension, and relieve the installation restriction of the traditional long strip structure. At the same time, the introduction of the mirror allows the lens group to work cooperatively on a non-linear path, which not only maintains the total length of the light path to ensure the imaging quality, but also improves the space utilization by arranging in multiple directions. The projector lens structure 1000 provided by the utility model can change the shape of the projector lens, can reduce or adjust the size of the projector lens, and save or adjust the structure space occupied by the projector lens.
[0045] Further, the two mirrors include a first mirror 31 and a second mirror 32, the first mirror 31 is obliquely placed at the connection of the first light path channel 21 and the second light path channel 22 to reflect the light of the first light path channel 21 to the second light path channel 22, the second mirror 32 is placed at the connection of the second light path channel 22 and the third light path channel 23 to reflect the light of the first light path channel 21 to the third light path channel 23, the reflecting surfaces of the first mirror 31 and the second mirror 32 are oppositely arranged. By oppositely arranging the reflecting surfaces of the first mirror 31 and the second mirror 32, the light path is orderly folded among the multiple channels, which significantly improves the space layout efficiency; the first mirror 31 is obliquely placed at the connection of the first light path channel 21 and the second light path channel 22 to deflect the incident light to the direction of the second light path channel 22, the second mirror 32 further guides the light path from the second light path channel 22 to the third light path channel 23, by twice reflection to realize twice turning of the optical axis direction, the originally extending light path in a single longitudinal direction can be decomposed into multiple light paths distributed in different directions, which effectively shortens the overall length of the lens, and avoids excessive stacking of the lens group in a single axial direction.
[0046] In order to form three light path channels 2 sequentially connected inside the shell 1, in an embodiment, please refer to Figure 1 and Figure 3The shell 1 comprises a first shell 13 and a second shell 16. The first shell 13 internally forms a cavity comprising a first accommodating cavity 151 and a second accommodating cavity 141 which are in communication with each other. The first accommodating cavity 151 extends in the up-down direction and has a lower wall surface penetrating through the first shell 13 to form the light inlet 11. The first accommodating cavity 151 forms the first light path channel 21. The second accommodating cavity 141 extends in the left-right direction and has a wall surface penetrating through the first shell 13. The second shell 16 is arranged at the right side of the first shell 13 and is connected with the first shell 13. The second shell 16 has a third accommodating cavity 161 which is open to the first shell 13. The third accommodating cavity 161 is in communication with the second accommodating cavity 141. One wall surface of the third accommodating cavity 161 in the front-back direction or in the up-down direction is provided with the light outlet 12. The side wall corresponding to the third accommodating cavity 161 and the light outlet 12 jointly define the third light path channel 23. The remaining part of the third accommodating cavity 161 and the second accommodating cavity 141 jointly form the second light path channel 22. The first reflecting mirror 31 is arranged in the first shell 13 and the second reflecting mirror 32 is arranged in the second shell 16. In this way, the light path enters the first accommodating cavity 151 from the light inlet 11 of the lower wall surface of the first shell 13. After reaching the first reflecting mirror 31 in the first shell 13, the light path is reflected to pass through the second accommodating cavity 141 and enter the third accommodating cavity 161. After reaching the second reflecting mirror 32 in the second shell 16, the light path is reflected to pass through the third accommodating cavity 161 and exit from the light outlet 12.
[0047] It should be noted that the light outlet 12 can be arranged on one wall surface of the third accommodating cavity 161 in the front-back direction or on one wall surface of the third accommodating cavity 161 in the up-down direction.
[0048] In some embodiments, the light inlet 11 and the light outlet 12 are arranged staggered in the left-right direction, both extend in the up-down direction, and the directions of the light inlet 11 and the light outlet 12 are the same or opposite. Specifically, when the light outlet 12 is arranged on the lower wall of the second shell 16, the light inlet 11 is arranged on the lower wall of the mounting cylinder 15. At this time, the directions of the light inlet 11 and the light outlet 12 are the same, and the direction of the light path entering the shell 1 from the light inlet 11 is opposite to the direction of the light path outputting the shell 1 from the light outlet 12. When the light outlet 12 is arranged on the upper wall of the second shell 16, the light inlet 11 is arranged on the lower wall of the mounting cylinder 15. At this time, the directions of the light inlet 11 and the light outlet 12 are opposite, and the direction of the light path entering the shell 1 from the light inlet 11 is opposite to the direction of the light path outputting the shell 1 from the light outlet 12.
[0049] In some other embodiments, the light inlet 11 and the light outlet 12 are staggered in the left-right direction, and the light inlet 11 extends in the up-down direction, and the light outlet 12 extends in the front-rear direction. Specifically, when the light outlet 12 is arranged on the front wall or the rear wall of the second shell 16, the light outlet 12 extends in the front-rear direction. It can be understood that, referring to Figure 2 , the light path output by the light outlet 12 can also extend in a direction slightly deviated from the front-rear direction.
[0050] It should be noted that the light path arrangement in the above embodiments can be achieved by the first mirror 31 and the second mirror 32. The second mirror 32 can be arranged as an aspheric mirror. In addition, the output of the light path from the light outlet 12 can be achieved by arranging the mounting direction of the second mirror 32 in the second shell 16.
[0051] The utility model discloses do not limit the specific structure of the first shell 13, one embodiment, the first shell 13 includes the mounting seat 14 and the installation cylinder 15, the left end wall 142 of mounting seat 14 is installed for the first mirror 31, the mounting seat 14 has the second accommodating cavity 141, the right end wall 143 of mounting seat 14 is connected with the second shell 16;The installation cylinder 15 is arranged along the up-down direction and is penetrated to form the first accommodating cavity 151, and the lower end of the installation cylinder 15 forms the light inlet 11, and the upper end of the installation cylinder 15 is connected with the lower side wall 144 of the mounting seat 14.
[0052] The left end wall 142 of the mounting seat 14 fixes the first mirror 31, and the right end wall 143 is connected with the second shell 16, so as to realize the butt joint between the first shell 13 and the second shell 16 in the left-right direction of the light path channel 2. The installation cylinder 15, which is penetrated in the up-down direction, forms an independent first accommodating cavity 151, and the lower end thereof serves as the light inlet 11 to realize the unobstructed introduction of light, and the upper end is connected with the lower side wall 144 of the mounting seat 14 to form an up-down light path transmission path. In this way, the components are prevented from interfering with each other, and separate processing and assembly are facilitated. In addition, the connection mode of the installation cylinder 15 and the mounting seat 14 fully utilizes the up-down space, cooperates with the left-right extending mounting seat 14, realizes multi-dimensional compact arrangement, and reduces the occupied volume of the overall structure. Therefore, through the combined connection of the mounting seat 14 and the installation cylinder 15, the first shell 13 can strengthen the space integration and assembly efficiency.
[0053] It should be noted that the mounting seat 14 and the mounting cylinder 15 can be connected by screwing. Specifically, in an embodiment, the upper end of the mounting cylinder 15 extends circumferentially to form a mounting wall, the upper wall surface of the mounting cylinder 15 is matched with the outer wall surface of the lower side wall 144 of the mounting seat 14, and the mounting wall is screwed with the lower side wall 144 of the mounting seat 14. The lower end of the mounting cylinder 15 extends circumferentially to form another mounting wall, which can be connected with the projection light machine.
[0054] In order to make the installation and disassembly of the first reflecting mirror 31 more convenient, please refer to Figure 3 In an embodiment, the left end wall 142 of the mounting seat 14 is arranged to be inclined upward from left to right to form an inclined surface, and a mounting hole is formed in the inclined surface. The first reflecting mirror 31 is arranged outside the inclined surface, and the reflecting surface of the first reflecting mirror 31 corresponds to the mounting hole. In this way, the light path can pass through the mounting hole from the first light path channel 21 to the reflecting surface of the first reflecting mirror 31, and after reflection, it is shot towards the second light path channel 22. Moreover, since the first reflecting mirror 31 is arranged outside the inclined surface, it is convenient to replace or disassemble.
[0055] In other embodiments, the first reflecting mirror 31 can be inclinedly mounted to the inner side of the left end wall 142 of the mounting seat 14 through a fixing frame. This application will not be described here.
[0056] In order to further improve the stability of the first reflecting mirror 31, the first housing 13 further comprises a reflecting mirror seat 17, which covers the mounting hole. The side wall of the reflecting mirror seat 17 towards the mounting hole is recessed inward to form a groove for accommodating the first reflecting mirror 31. By arranging an independent reflecting mirror seat 17 and designing an inward groove structure, the precise positioning and stable packaging of the first reflecting mirror 31 are realized. After the reflecting mirror seat 17 covers the mounting hole, the groove can tightly fit the edge of the first reflecting mirror 31, avoiding the deviation of the lens during installation or vibration. In addition, through the reflecting mirror seat 17, the installation and maintenance of the first reflecting mirror 31 can be independent of the mounting seat 14, and when disassembled, other components do not need to be disturbed, simplifying the replacement or calibration process. Covering the mounting hole with the reflecting mirror seat 17 can block the mounting hole from the external environment, reducing the risk of dust entering the light path channel 2.
[0057] Further, the mounting seat 14 and the reflecting mirror seat 17 are screwed and fixed. The screwing and fixing mode can provide stable and reliable rigid connection through the mechanical locking action of threaded connection, improve the long-term structural stability between the mounting seat 14 and the reflecting mirror seat 17, and avoid displacement caused by vibration or external force. Its detachable characteristics facilitate installation, debugging and maintenance, and the progressive tightening of the thread can fine-tune the pressure distribution, reduce the interference of assembly stress on the mirror surface, thereby ensuring the imaging quality and long-term stability of the optical system.
[0058] With reference to the accompanying drawings Figure 4 The mirror seat 17 is further provided with a plurality of positioning holes 171, and the left end wall 142 of the mounting seat 14 is correspondingly provided with a plurality of positioning columns which can be inserted into the plurality of positioning holes 171. The cooperation of the positioning holes 171 and the positioning columns realizes the quick and accurate pre-positioning of the mounting seat 14 and the mirror seat 17 through mechanical insertion, effectively preventing rotation deviation or misplacement during assembly.
[0059] Further, the plurality of lenses include a front group lens set and a rear group lens set, the front group lens set is arranged in the second light path channel 22, and the rear group lens set is arranged in the first light path channel 21. The front group lens set and the rear group lens set are arranged in the second light path channel 21 and the first light path channel, the front group lens set is arranged in the second channel along the left-right direction, and the rear group lens set is arranged in the first channel along the up-down direction, the lenses are dispersed to different spatial dimensions by light path turning, and the single-direction size redundancy caused by the traditional single-axis stacking is avoided. The installation of the different light path channels 2 makes the lens set installation positions relatively independent, which helps to reduce the risk of mechanical interference between groups.
[0060] The utility model also proposes a kind of projection equipment, the projection equipment includes above-mentioned projector lens structure 1000, because the projection equipment includes the projector lens structure 1000, the specific structure of this projector lens structure 1000 refers to above-mentioned embodiment, since the projector lens structure 1000 of this projection equipment adopts all technical solutions of above-mentioned all embodiments, at least has all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer tediously repeat.
[0061] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure transformation using the utility model specification and drawing contents, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.
Claims
1. A projector lens structure, characterized by comprising: The projector lens structure comprises: a housing having a light inlet and a light outlet, the light inlet and the light outlet being staggered, and three light path channels being formed in the housing in sequence, the three light path channels comprising a first light path channel, a second light path channel and a third light path channel, each two adjacent light path channels being intersected in extension direction, and the first light path channel and the third light path channel forming the light inlet and the light outlet respectively; a lens assembly comprising a plurality of lenses, the plurality of lenses being distributed in the first light path channel and the second light path channel; and a mirror assembly arranged in at least part of the light path channels to change the refraction direction of the light after entering.
2. The projector lens structure of claim 1, wherein, The two mirrors comprise a first mirror and a second mirror, the first mirror being arranged obliquely at the connection between the first light path channel and the second light path channel, and the second mirror being arranged at the connection between the second light path channel and the third light path channel, the reflecting surfaces of the first mirror and the second mirror being arranged oppositely.
3. The projector lens structure of claim 2, wherein, The housing comprises: a first housing, a cavity being formed in the first housing, the cavity comprising a first accommodating cavity and a second accommodating cavity in communication, the first accommodating cavity extending in up-down direction and having a lower wall surface penetrating through the first housing to form the light inlet, the first accommodating cavity forming the first light path channel, and the second accommodating cavity extending in left-right direction and having a wall surface penetrating through the first housing; and a second housing arranged at the right side of the first housing and connected with the first housing, the second housing having a third accommodating cavity open to the first housing, the third accommodating cavity being in communication with the second accommodating cavity, and one wall surface of the third accommodating cavity in front-rear direction or in up-down direction being provided with the light outlet, so that the light outlet and the corresponding side wall of the third accommodating cavity jointly define the third light path channel, and the remaining part of the third accommodating cavity and the second accommodating cavity jointly form the second light path channel; wherein the first mirror is arranged in the first housing, and the second mirror is arranged in the second housing.
4. The projector lens structure of claim 3, wherein, The first housing comprises: a mounting seat, the left end wall of the mounting seat being provided for mounting the first mirror, the mounting seat having the second accommodating cavity, and the right end wall of the mounting seat being connected with the second housing; and a mounting cylinder penetrating through in up-down direction to form the first accommodating cavity, the lower port of the mounting cylinder forming the light inlet, and the upper end of the mounting cylinder being connected with the lower side wall of the mounting seat.
5. The projector lens structure of claim 4, wherein, The left end wall of the mounting seat is arranged obliquely upward from left to right to form an inclined surface, and the mounting hole is formed in the inclined surface, and the reflecting surface of the first mirror corresponds to the mounting hole.
6. The projector lens structure of claim 5, wherein, The first housing further comprises a mirror seat, the mirror seat being arranged on the mounting hole, and the side wall of the mirror seat towards the mounting hole being recessed inward to form a groove for accommodating the first mirror.
7. The projector lens structure of claim 4, wherein, The mounting seat and the mirror seat are fixed by screwing; and / or, A plurality of positioning holes are further arranged on the mirror seat, and a plurality of positioning columns corresponding to the positioning holes are arranged on the left end wall of the mounting seat.
8. The projector lens structure of claim 1, wherein, The light inlet and the light outlet are staggered in the left-right direction, both extend in the up-down direction, and the light inlet and the light outlet have the same or opposite directions; or The light inlet and the light outlet are staggered in the left-right direction, the light inlet extends in the up-down direction, and the light outlet extends in the front-back direction.
9. The projector lens structure of claim 1, wherein, The plurality of lens groups include a front group and a rear group, the front group is arranged in the second light path channel, and the rear group is arranged in the first light path channel.
10. A projection apparatus, characterized by, A projector lens structure as claimed in any one of claims 1 to 9.