Projector

Abstract

The utility model relates to a projector. The projector comprises a shell, a ray machine lens and an external lens. The shell is provided with an accommodating cavity and a mounting structure; the mounting structure comprises a connecting area and a hollow mounting area, the connecting area is arranged in the mounting area, and the mounting area is used for communicating the accommodating cavity with the external space of the shell. And the ray machine lens is arranged in the accommodating cavity. The external lens comprises a first part and a second part; the first part penetrates through the mounting area and is used for being matched with the ray machine lens to carry out image projection; and the second part is detachably connected with the connecting area.

Description

Technical Field

[0001] This disclosure relates to the field of projection equipment technology, and in particular to a projector. Background Technology

[0002] To meet the need for adjustable projector throw ratios, some projectors can achieve adjustable throw ratios by adding accessories. However, some projectors with adjustable throw ratios suffer from poor image projection quality. Utility Model Content

[0003] This disclosure provides a projector that addresses the problem of poor image projection quality in projectors with adjustable throw ratio.

[0004] This disclosure relates to a projector, including a housing, an optical engine lens, and an external lens. The housing has a receiving cavity and a mounting structure; the mounting structure includes a connecting region and a hollowed-out mounting region, the connecting region being disposed in the mounting region and serving to connect the receiving cavity with the external space of the housing. The optical engine lens is disposed within the receiving cavity. The external lens includes a first portion and a second portion; the first portion passes through the mounting region and is used to cooperate with the optical engine lens for image projection; the second portion is detachably connected to the connecting region.

[0005] Beneficial effects:

[0006] According to the projector disclosed herein, image projection can be performed either solely through the optical engine lens or in conjunction with an external lens, depending on the user's needs. When the optical engine lens and external lens are used together for image projection, the external lens passes through the mounting area and directly engages with the optical engine lens. This shortens the assembly tolerance chain between the external and optical engine lenses, reducing the matching error and thus improving the projector's projection effect. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of a projector in one embodiment provided in this disclosure.

[0009] Figure 2 This is a schematic diagram of the structure of a projector in one embodiment of the present disclosure, wherein the decorative element is mounted on the housing.

[0010] Figure 3 This is a schematic diagram of the structure of a projector in one embodiment of the present disclosure, wherein an external lens is used in conjunction with an optical engine lens.

[0011] Figure 4 This is a schematic diagram of the structure of an external lens, an optical-mechanical lens, a first positioning part, and a second positioning part in one embodiment provided in this disclosure.

[0012] Figure 5 This is a schematic diagram of the structure of the external lens, the optical-mechanical lens, the first positioning part, and the second positioning part in another embodiment provided in this disclosure.

[0013] Figure 6 This is a schematic diagram of the structure of the decorative part, the first mating part, and the second mating part in one embodiment provided in this disclosure.

[0014] Figure 7 This is a schematic diagram of the structure of the decorative part, the first mating part, and the second mating part in another embodiment provided in this disclosure.

[0015] Figure 8 This is a cross-sectional view of the decorative element, the first mating part, and the second mating part in another embodiment provided in this disclosure.

[0016] Figure 9 This is a cross-sectional view of the decorative element, the first mating part, and the second mating part in another embodiment provided in this disclosure.

[0017] Figure 10 This is a schematic diagram of the structure of the external lens, the optical-mechanical lens, the first positioning part, and the second positioning part in another embodiment provided in this disclosure.

[0018] Figure 11 yes Figure 10 A schematic diagram of the explosion structure.

[0019] Figure 12 This is a schematic diagram of the structure of the external lens, the optical-mechanical lens, the first positioning part, and the second positioning part in another embodiment provided in this disclosure.

[0020] Figure 13 yes Figure 12 A schematic diagram of the explosion structure.

[0021] Figure 14 This is a schematic diagram of the structure of the external lens, the optical-mechanical lens, the first positioning part, and the second positioning part in another embodiment provided in this disclosure.

[0022] Figure 15 yes Figure 14 A schematic diagram of the explosion structure.

[0023] Figure 16This is a cross-sectional view of the external lens, optical-mechanical lens, first positioning part, and second positioning part in another embodiment provided in this disclosure.

[0024] Figure 17 This is an exploded structural diagram of the outer shell, external lens, first connecting part and second connecting part in one embodiment provided in this disclosure.

[0025] Figure 18 This is a schematic diagram of the structure of the external lens and the second connecting part in one embodiment provided in this disclosure.

[0026] Figure 19 This is a schematic diagram of the connection between the housing and the external lens in another embodiment provided in this disclosure.

[0027] Figure 20 This is a schematic diagram of the structure of the external lens and the second connecting part in another embodiment provided in this disclosure.

[0028] Figure 21 This is a cross-sectional view of the housing, external lens, first connecting part and second connecting part in another embodiment provided in this disclosure.

[0029] Figure 22 This is a cross-sectional view of the housing, external lens, first connecting part and second connecting part in another embodiment provided in this disclosure.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Projector; 10. Housing; 11. Front wall; 12. First mating part; 12a. Guide strip; 12b. First pivot part; 12c. Snap-fit ​​hole; 12d. Fixing hole; 12e. First suction part; 20. Optical-mechanical lens; 30. External lens; 31. First part; 32. Second part; 321. First section; 322. Second section; 41. First connecting part; 41a. Snap-fit ​​hole; 41b. Internal thread section; 42. Second connecting part; 42a. Snap-fit; 421. Connecting section; 422. Engaging section; 42b. External thread section; 51. First positioning part; 51a. First mating end; 52. Second positioning part; 52a. Second mating part End; 61, Connector; 71, Positioning component; C1, Guide groove; C2, Positioning groove; C3, Mating groove; 80, Decorative component; 81, Decorative shell; 82, Lens; 83, Second mating part; 83a, Guide part; 83b, Second pivot part; 83c, Snap-on part; 83d, Fixing part; 83e, Second adsorption part; 84, Pivot; 90, Detector; L1, First optical axis; L2, Second optical axis; Q, Receiving cavity; K31, First connecting hole; K32, Second connecting hole; K41, First positioning hole; K42, Second positioning hole; K8, Through hole; P1, Mounting structure; P11, Connecting area; P12, Mounting area; P2, Contact surface. Detailed Implementation

[0032] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only.

[0034] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0035] Some known projectors typically have a fixed throw ratio, which cannot meet users' needs for adjusting the screen width. Projectors usually adjust the throw ratio by using a zoom lens or an external repeater. However, zoom lens solutions are expensive, and some external lenses, when installed after the projector, suffer from poor alignment between the lens and the projector's optical engine lens due to product tolerances and dimensional errors after assembly. This leads to a decrease in projection quality after adjusting the throw ratio.

[0036] To solve at least part of the above problems, see [link to relevant documentation]. Figures 1 to 3 This embodiment provides a projector 100, including a housing 10, an optical engine lens 20, and an external lens 30. The housing 10 has a receiving cavity Q and a mounting structure P1. The mounting structure P1 includes a connecting region P11 and a hollowed-out mounting region P12. The connecting region P11 is located in the mounting region P12, and the mounting region P12 is used to connect the receiving cavity Q with the external space of the housing 10. The optical engine lens 20 is disposed in the receiving cavity Q. One end of the external lens 30 is used to pass through the mounting region P12, and the external lens 30 is detachably connected to the connecting region P11 to cooperate with the optical engine lens 20 for image projection.

[0037] According to the projector 100 of this disclosure, the projector 100 can, according to user needs, perform image projection either by using the optical-mechanical lens 20 alone or by using the optical-mechanical lens 20 in conjunction with an external lens 30. When the optical-mechanical lens 20 projects alone, it is located within the housing cavity Q, ensuring good protection for the lens 20 from the housing. When the optical-mechanical lens 20 is used in conjunction with the external lens 30 for image projection, the external lens 30 passes through the mounting area P12 and directly engages with the optical-mechanical lens 20. This shortens the assembly tolerance chain between the external lens 30 and the optical-mechanical lens 20, reducing the engagement error and thus improving the projection effect of the projector 100.

[0038] When the external lens 30 passes through the mounting area P12, it connects directly to the connecting area P11. This facilitates adjustment of the positional relationship between the external lens 30 and the optical engine lens 20, thereby improving the alignment accuracy between them and ensuring projection quality. Furthermore, the connecting area P11 is located on the outer casing 10, allowing the external lens 30 to be installed and removed from the outside of the casing 10, thus enhancing the ease of installation and removal. Additionally, the ample surface area of ​​the outer casing 10 allows for a larger connecting area P11, providing more space for the installation and removal of the external lens 30, making installation and removal more convenient. Simultaneously, the external lens 30 is inexpensive, enabling the projector 100 of this disclosure to balance low cost and high image projection quality, achieving an adjustable throw ratio.

[0039] Specifically, see Figure 4 and Figure 5 The external lens 30 includes a first part 31 and a second part 32. The first part passes through the mounting area P12 and is used to cooperate with the optical-mechanical lens 30 for image projection. The second part 32 is detachably connected to the connection area P11. For example, the first part 31 can be a lens structure, and the second part 32 can be a housing structure. The second part 32 can be disposed on the outer periphery of the first part 31. For another example, the first part 31 can be a combination of a lens and a portion of the housing, and the second part 32 is another portion of the housing, with the second part 32 connected to one end of the first part along the axial direction of the lens. Therefore, the specific construction of the first part 31 and the second part 32 can be determined according to actual needs and is not limited here.

[0040] Optionally, the external lens 30 can be a repeater. There can be multiple external lenses 30, each with various specifications to meet the user's different projection ratio adjustment needs.

[0041] Optionally, the projector 100 also includes an optical engine unit (not shown). The optical engine unit is disposed within the housing cavity Q. The optical engine unit is used to transmit image information. The optical engine lens 20 is connected to the optical engine unit to project the image information transmitted by the optical engine unit.

[0042] In some embodiments, see Figure 1 The projector 100 also includes a detection element 90, which is used to detect the position information of the external lens 30 relative to the optical engine lens 20. Thus, when there is a deviation in the position of the external lens 30, the detection element 90 can send a signal to the controller of the projector 100, and the controller can activate the alarm component to sound an alarm, so that the user can adjust the position of the external lens 30 in time, thereby ensuring the image projection effect.

[0043] Optionally, the detection element 90 can be configured as a position detection component such as an infrared detector or a Hall detector.

[0044] Optionally, the detection element 90 may be disposed within the housing 10 and connected to the housing 10. In other embodiments, the detection element 90 may also be connected to the optical-mechanical lens 20.

[0045] The following reference Figure 4 and Figure 5 This invention describes an embodiment of the mounting structure P1 and the external lens 30.

[0046] Specifically, the connection area P11 is a portion of the surface of the housing 10 near the edge of the mounting area P12. The connection area P11 can be a portion of either the inner or outer surface of the housing 10.

[0047] In some embodiments, the housing 10 includes a front wall 11. A mounting structure P1 is provided on the front wall 11 to facilitate the mating of the optical-mechanical lens 20 with the external lens 30.

[0048] In some embodiments, the connection region P11 is arranged around the mounting region P12.

[0049] Specifically, see Figure 4 The mounting area P12 is a through hole extending through the housing 10 along its thickness direction. The connecting area P11 can be constructed as an annular area surrounding the connecting area P11. The connecting area P11 can be coplanar with the surface of the front wall 11, or it can be offset relative to the surface of the front wall 11 towards the inside or outside of the receiving cavity Q, so as to realize the installation of different models of external lenses 30.

[0050] In some embodiments, the connection area P11 is located on one side of the mounting area P12.

[0051] Specifically, the mounting area P12 is a through hole extending through the housing 10 along its thickness direction, and the connection area P11 is located on one side of the mounting area P12 along its radial direction. For example, see... Figure 5 The connecting area P11 can be the inner surface of the through hole along its radial direction.

[0052] For example, the connecting area P11 is a part of the surface of the front wall 11 near the edge of the through hole. The connecting area P11 can be a fan-shaped area, a fan-ring area, a rectangular area, etc.

[0053] In some embodiments, see Figure 4 and Figure 5 The end of the second part 32 that is away from the first part 31 is at least partially located in the external space of the outer casing 10.

[0054] In some implementations, see Figure 4 The second part 32 can be completely disposed in the external space of the housing 10. The end of the second part 32 near the first part 31 is connected to the connection area P11. In this way, the ease of installation and removal of the external lens 30 by the user can be improved. Furthermore, sufficient space is provided within the housing cavity Q to install the optical engine lens 20 and the first part 31.

[0055] In other implementations, see Figure 5 The second part 32 includes a first segment 321 and a second segment 322. The first segment 321 connects to the first part 31. The second segment 322 connects to the end of the first segment 321 opposite to the first part 31. The first part 31 is located within the receiving cavity Q and mates with the optical-mechanical lens 20. The first segment 321 extends into the mounting region P12 and connects to the connecting region P11 (for example, the connecting region P11 can be constructed as the inner peripheral surface of the mounting region P12, and the outer peripheral surface of the first segment 321 connects to the connecting region P11). The second segment 322 is located in the external space of the housing 10. Thus, when the external lens 30 mates with the optical-mechanical lens 20, the structural compactness of the projector 100 can be improved.

[0056] In some embodiments, see Figure 4 The second part 32, near the end of the first part 31, abuts against the connecting area P11. This improves the fitting accuracy between the second part 32 and the outer shell 10, reduces the positional error of the external lens 30 relative to the outer shell 10, thereby improving the alignment accuracy between the external lens 30 and the optical engine lens 20, and further enhancing the projection effect.

[0057] Optionally, see Figure 4 The second part 32 has a contact surface P2 at one end near the first part 31. The contact surface P2 abuts against the connecting area P11.

[0058] See Figures 2 to 3The projector 100 also includes a decorative element 80. The decorative element 80 is detachably connected to the opening K1 and has a closed state that seals the optical engine lens 20, and an open state that opens the mounting area P11; wherein, see Figure 2 When the decorative element 80 is in the closed state, the external lens 30 separates from the connecting area P11. (See also...) Figure 3 When the decorative element 80 is in the open state, the external lens 30 is connected to the connection area P11.

[0059] Thus, when the decorative element 80 is in a closed state, it can seal the mounting area P11 to enclose the receiving cavity Q, improving the dustproof effect of the receiving cavity Q and ensuring the operational reliability of the optical engine lens 20 and other internal structures of the projector 100. When the user needs to adjust the projection ratio, the decorative element 80 can be easily removed to allow the external lens 30 to pass through the mounting area P11 and cooperate with the optical engine lens 20 to achieve the adjustment of the projection ratio.

[0060] Optionally, see Figure 1 The optical-mechanical lens 21 has a first optical axis L1, and the decorative element 80 has a central axis L3. The central axis L3 is aligned with the first optical axis L1. Thus, when the decorative element 80 is mounted on the housing 10, it can prevent the decorative element 80 from affecting the image projection effect of the optical-mechanical lens 21, thereby ensuring image projection quality. For example, see... Figure 3 The decorative component 80 includes a decorative shell 81 and a lens 82. The decorative shell 81 has a through hole K8. The lens 82 fits into the through hole K8 and is connected to the decorative shell 81. The central axis L3 is the optical axis of the lens 82, thus significantly reducing the influence of the lens 82 on the projection effect of the optical-mechanical lens 21.

[0061] See below. Figures 6 to 9 Describe the structural form of the detachable connection between the decorative part 80 and the housing 10.

[0062] Optionally, see Figure 6 The outer casing 10 includes a first mating portion 12. The decorative element 80 includes a second mating portion 83. The second mating portion 83 connects to the decorative casing 81. The second mating portion 83 is detachably connected to the first mating portion 12.

[0063] In some embodiments, the decorative element 80 is slidably disposed on the housing 10.

[0064] Optionally, see Figure 6The first mating part 12 includes a guide strip 12a. The guide strip 12a is located inside the housing 10 and is connected to the housing 10. The second mating part 83 includes a guide part 83a. The guide part 83a has a guide groove C1. The guide strip 12a fits into the guide groove C1. Thus, the decorative piece 80 can slide along the length of the guide strip 12a. When the decorative piece 80 slides on the guide strip 12a away from the mounting area P11 until the mounting area P11 is exposed, the decorative piece 80 is in an open state. When the decorative piece 80 slides on the guide strip 12a close to the mounting area P11 until the mounting area P11 is blocked, the decorative piece 80 is in a closed state.

[0065] Optionally, the opening direction of the guide groove C1 is set along the radial direction of the through hole K8.

[0066] Optionally, see Figure 6 There are two guide sections 83a. The two guide sections 83a are respectively connected to both sides of the decorative shell 81. There are two guide strips 12a. The two guide strips 12a are respectively provided on both sides of the mounting area P11. Each guide strip 12a mates with the guide groove C1 of the corresponding guide section 83a.

[0067] In some embodiments, the decorative element 80 is rotatably disposed on the housing 10.

[0068] Optionally, see Figure 1 and Figure 7 The first mating part 12 includes a first pivot part 12b. The second mating part 83 includes a second pivot part 83b. The second pivot part 83b is rotatably connected to the first pivot part 12b via a pivot 84. The axis of the pivot 84 is perpendicular to the radial direction of the mounting area P11. Thus, the decorative piece 80 can rotate relative to the mounting area P11, thereby being able to rotate to an open or closed state.

[0069] In some embodiments, the decorative element 80 snaps into the housing 10.

[0070] Optionally, see Figure 8 The first mating part 12 has a snap-fit ​​hole 12c. The second mating part 83 includes a latching part 83c. The latching part 83c is snapped into the snap-fit ​​hole 12c. In another embodiment, the first mating part 12 includes a latching part 83c. The second mating part 83 has a snap-fit ​​hole 12c. The specific structure of the latching part 83c can be referred to the known latching member 42a, and will not be described in detail here.

[0071] In some embodiments, the decorative element 80 is threaded to the housing 10.

[0072] Optionally, see Figure 8The first mating part 12 includes a fixing hole 12d formed in the front wall, and the second mating part 83 includes a fixing part 83d, which passes through the fixing hole 12d and is fixedly connected to the first mating part 12. In another embodiment, the first mating part 12 includes a fixing part 83d, and the second mating part 83 has a fixing hole 12d, which can be a threaded hole, a pin hole, etc.

[0073] In some embodiments, the decorative element 80 is attached to the housing 10.

[0074] Optionally, see Figure 9 The first mating part 12 includes a first adsorption part 12e, and the second mating part 83 includes a second adsorption part 83e. The second adsorption part 83e is used to adsorb and fit onto the first adsorption part 12e. For example, both the first adsorption part 12e and the second adsorption part 83e can be constructed as permanent magnets, electromagnets, Velcro, or other components that can achieve mutual adsorption. Optionally, the first adsorption part 12e is embedded in the edge of the front wall 11 near the mounting area P11. The second adsorption part 83e is embedded in the end face of the decorative shell 81.

[0075] In some embodiments, the decorative element 80 is threaded to the housing 10.

[0076] In some embodiments, see Figure 9 The first mating part 12 includes a first threaded surface P31, and the second mating part 83 includes a second threaded surface P32. The first threaded surface P31 and the second threaded surface P32 are threadedly engaged. For example, the first threaded surface P31 is an internal thread located on the inner surface of the mounting area P11, and the second threaded surface P32 is located on the outer surface of the portion of the decorative shell 81 that extends into the mounting area P11. The external thread and the internal thread are threadedly engaged, thereby realizing the threaded connection between the decorative part 80 and the shell 10.

[0077] In some embodiments, see Figure 10 The optical-mechanical lens 20 has a first optical axis L1, and the external lens 30 has a second optical axis L2. When the second part 32 is connected to the connecting area P11, the second optical axis L2 and the first optical axis L1 at least partially coincide.

[0078] This improves the alignment accuracy between the external lens 30 and the optical engine lens 20, thereby enhancing the image projection effect of the projector 100.

[0079] Specifically, the first optical axis L1 is the optical axis of the optical engine lens 20. The second optical axis L2 is the optical axis of the lens 82.

[0080] There are several scenarios where the first optical axis L1 and the second optical axis L2 at least partially coincide. For example, the first optical axis L1 and the second optical axis L2 are parallel, and the distance between them is less than a first preset value, which is less than 0.1 mm. Another example is that the first optical axis L1 and the second optical axis L2 intersect, and the angle between them is less than a second preset value, which is less than 0.1°. Yet another example is that the first optical axis L1 and the second optical axis L2 completely coincide.

[0081] Understandably, this application does not specifically limit the first preset value and the second preset value. The first preset value and the second preset value can be any value, as long as the first optical axis L1 and the second optical axis L2 at least partially overlap.

[0082] In some embodiments, see Figure 10 The optical-mechanical lens 20 includes a first positioning part 51, and the first part 31 includes a second positioning part 52. The second positioning part 52 is used to position and cooperate with the first positioning part 51 so that the first optical axis L1 and the second optical axis L2 at least partially coincide.

[0083] Optionally, there are multiple first positioning parts 51 and multiple second positioning parts 52. The number of second positioning parts 52 is the same as the number of first positioning parts 51. The first positioning parts 51 are distributed around the first optical axis L1, and the distance between each first positioning part 51 and the first optical axis L1 is the same. The second positioning parts 52 are distributed around the second optical axis L2, and the distance between each second positioning part 52 and the second optical axis L2 is the same. In this way, after the first positioning parts 51 and the second positioning parts 52 are engaged, the overlap of the first optical axis L1 and the second optical axis L2 can be improved.

[0084] In some embodiments, the first positioning part 51 and the second positioning part 52 are positioned and engaged by at least one of threaded engagement, snap-fit ​​engagement, and magnetic engagement. This improves the positioning and engagement efficiency between the external lens 30 and the optical engine lens 20, and enhances the ease of use of the projector 100.

[0085] See below. Figures 10 to 16 The different positioning and engagement methods of the first positioning unit 51 and the second positioning unit 52 are described. It is understood that the optical-mechanical lens 20 and the external lens 30 can be positioned simultaneously using any one or more of the following positioning and engagement methods.

[0086] In some embodiments, see Figure 10 The second positioning part 52 is adsorbed and engaged with the first positioning part 51. In this way, the first positioning part 51 and the second positioning part 52 can be quickly assembled and disassembled, while ensuring positioning reliability.

[0087] Specifically, the first positioning part 51 and the second positioning part 52 can be magnetically attracted together. For example, one of the first positioning part 51 and the second positioning part 52 may be a permanent magnet or an electromagnet, while the other may be made of a ferromagnetic material. Alternatively, both the first positioning part 51 and the second positioning part 52 may be permanent magnets or electromagnets. Or, both the first positioning part 51 and the second positioning part 52 may be constructed as Velcro or similar components.

[0088] In some embodiments, see Figure 11 The first positioning part 51 has a first positioning hole K41, and the second positioning part 52 has a second positioning hole K42. The projector 100 also includes a first positioning member 71. The first positioning member 71 is used for positioning and engaging with the first positioning hole K41 and the second positioning hole K42. Thus, after the first positioning hole K41 and the second positioning hole K42 are aligned, the first positioning member 71 is inserted into the first positioning hole K41 and the second positioning hole K42, thereby achieving the positioning and engagement of the first positioning part 51 and the second positioning part 52.

[0089] Specifically, the first positioning hole K41 extends through the first positioning portion 51 along the extension direction of the first optical axis L1. The second positioning hole K42 extends through the second positioning portion 52 along the extension direction of the second optical axis L2. In other embodiments, one of the first positioning hole K41 and the second positioning hole K42 may also be constructed as a blind hole. Furthermore, the cross-sectional shape of the first positioning hole K41 may be the same as or similar to the cross-sectional shape of the second positioning hole K42.

[0090] The first positioning element 71 can be specifically set as a positioning pin or a positioning screw.

[0091] In some embodiments, see Figure 12 and Figure 13 In the first positioning part 51 and the second positioning part 52, one of them has a positioning groove C2, and the other is used for positioning and fitting into the positioning groove C2.

[0092] Specifically, Figure 12 and Figure 13 In the illustrated embodiment, the positioning groove C2 extends through the first positioning part 51 along the extension direction of the first optical axis L1. The second positioning part 52 is connected to the end face of the external lens 30 and extends along the extension direction of the second optical axis L2.

[0093] In some embodiments, see Figure 14 and Figure 15The first positioning part 51 includes a first mating end 51a, which is located at the end of the optical-mechanical lens 20 facing the external lens 30. The second positioning part 52 includes a mating groove C3, which has an opening at the end of the external lens 30 facing the optical-mechanical lens 20. The first mating end 51a is used for positioning and mating with the mating groove C3. For example, the first mating end 51a can be inserted into the mating groove C3 from the opening of the mating groove C3, thereby positioning the optical-mechanical lens 21 and the external lens 30.

[0094] Specifically, the first mating end 51a has a first central axis (not shown in the figure), and the first central axis coincides with the first optical axis L1. The mating groove C3 has a second central axis (not shown in the figure), and the second central axis coincides with the second optical axis L2. The cross-section of the mating groove C3 is at least partially the same as the cross-section of the first mating end 51a. Thus, after the first mating end 51a and the mating groove C3 are mated, the first central axis and the second central axis at least partially coincide, thereby achieving at least partial coincidence of the first optical axis L1 and the second optical axis L2.

[0095] In some embodiments, see Figure 16 The first positioning part 51 includes a mating groove C3, which is located at one end of the optical-mechanical lens 20 facing the external lens 30. The second positioning part 52 includes a second mating end 52a, which is located at one end of the external lens 30 facing the optical-mechanical lens 20. The second mating end 52a is used for positioning and mating with the mating groove C3. For example, the second mating end 52a can be inserted into the mating groove C3 from the opening of the mating groove C3, thereby positioning the optical-mechanical lens 21 and the external lens 30.

[0096] Specifically, the mating groove C3 has a first central axis, which coincides with the first optical axis L1. The second mating end 52a has a second central axis, which coincides with the second optical axis L2. The cross-section of the mating groove C3 is at least partially the same as the cross-section of the second mating end 52a. Thus, after the second mating end 52a and the mating groove C3 are mated, the first central axis and the second central axis at least partially coincide, thereby achieving at least partial coincidence between the first optical axis L1 and the second optical axis L2.

[0097] The following is combined Figures 17 to 22 The detachable connection method between the external lens 30 and the connection area P11 is described. It is understood that any of the detachable connection methods described below can be provided simultaneously with the aforementioned first positioning part 51, second positioning part 52, and other components on the housing 10, the optical-mechanical lens 20, and the external lens 30.

[0098] In some embodiments, see Figure 17 and Figure 18The connecting area P11 is provided with a first connecting part 41, and the second part 32 includes a second connecting part 42, which is detachably connected to the first connecting part 41. This ensures the installation stability of the external lens 30. Furthermore, the external lens 30 can simultaneously pass through the mounting area P12 and connect to the connecting area P11, thereby improving the ease of installation and removal of the external lens 30.

[0099] In some embodiments, the first connecting portion 41 and the second connecting portion 42 are detachably connected by at least one of threaded connection, snap-fit ​​connection, and adsorption connection.

[0100] In some embodiments, see Figure 17 and Figure 18 There are multiple first connecting parts 41 and multiple second connecting parts 42. The number of second connecting parts 42 is the same as the number of first connecting parts 41. Each second connecting part 42 is detachably connected to the corresponding first connecting part 41.

[0101] In some implementations, see Figure 17 and Figure 18 Multiple first connecting parts 41 are evenly distributed around the first optical axis L1. Multiple second connecting parts 42 are evenly distributed around the second optical axis L2. Thus, when the multiple first connecting parts 41 and the multiple second connecting parts 42 are connected, they can be aligned and positioned to coincide with the first optical axis L1 and the second optical axis L2, thereby further improving the projection effect of the projector 100.

[0102] In some embodiments, see Figure 17 and Figure 18 The first connecting part 41 and the second connecting part 42 are magnetically attached together. Specifically, the first connecting part 41 and the second connecting part 42 can be magnetically attached together. For example, one of the first connecting part 41 and the second connecting part 42 may be a permanent magnet or electromagnet, and the other may be made of a ferromagnetic material. Alternatively, both the first connecting part 41 and the second connecting part 42 may be permanent magnets or electromagnets. Or, both the first connecting part 41 and the second connecting part 42 may be constructed as Velcro or similar components.

[0103] Optionally, the first connecting part 41 is embedded in the connecting area P11, and the second connecting part 42 is embedded in the contact surface P2. This facilitates the fit between the connecting area P11 and the contact surface P2, thereby reducing the connection error between the external lens 30 and the connecting area P11.

[0104] In some embodiments, see Figure 19 and Figure 20The first connecting part 41 includes a locking hole 41a. The locking hole 41a penetrates the housing 10. A plurality of locking holes 41a are located on one side of the mounting structure P1. The second connecting part 42 includes a snap fastener 42a. The snap fastener 42a passes through the locking hole 41a and engages with the housing 10.

[0105] In some implementations, see Figure 20 The latch 42a includes a connecting section 421 and a locking section 422. The connecting section 421 protrudes from the external lens 30. The connecting section 421 passes through the latch hole 41a. The locking section 422 connects to the end of the connecting section 421 facing away from the external lens 30 and abuts against the inner surface of the housing 10. In this way, the latch 42a and the latch hole 41a are engaged.

[0106] Specifically, the connecting segment 421 may protrude from the contact surface P2. The locking hole 41a is formed in the connecting area P11.

[0107] Optionally, see Figure 20 The connecting section 421 protrudes along the extension direction of the second optical axis L2, and the engaging section 422 extends radially along the external lens 30. Thus, after the latch 42a passes through the latch hole 41a, the engaging section 422 can be engaged with the housing 10 by rotating the external lens 30, thereby improving the ease of installation and removal of the external lens 30.

[0108] In some embodiments, see Figure 21 In the first connecting portion 41 and the second connecting portion 42, one includes an internal thread section 41b and the other includes an external thread section 42b, which are threadedly engaged with the internal thread section 41b. For example, the internal thread section 41b is provided in the connecting area P11. The external thread section 42b is provided on the outer surface of the external lens 30. The external thread section 42b may be provided in the first portion 31 and / or the second portion 32. Thus, after the external lens 30 is inserted into the mounting area P12, the connection between the external lens 30 and the connecting area P11 can be achieved by rotating the external lens 30.

[0109] In some embodiments, see Figure 22 The first connecting portion 41 has a first connecting hole K31. The second connecting portion 42 has a second connecting hole K32. The projector 100 also includes a fastener. The fastener passes through the first connecting hole K31 and the second connecting hole K32 to connect the first connecting portion 41 and the second connecting portion 42. The fastener may be a screw, pin, or other fastening component.

[0110] Optionally, when the fastener connects the first connecting part 41 and the second connecting part 42, the connecting area P11 fits against the contact surface P2.

[0111] The above description is merely an embodiment of this disclosure and does not limit the patent scope of this disclosure. Any equivalent structural or procedural transformations made using the content of this disclosure and its drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this disclosure.

Claims

1. A projector, characterized in that, include: The housing has a receiving cavity and a mounting structure; the mounting structure includes a connecting area and a hollow mounting area, the connecting area being disposed in the mounting area, and the mounting area being used to connect the receiving cavity with the external space of the housing; An optical-mechanical lens, wherein the optical-mechanical lens is disposed within the receiving cavity; An external lens, comprising a first part and a second part; the first part passes through the mounting area and is used to cooperate with the optical-mechanical lens for image projection; the second part is detachably connected to the connection area.

2. The projector according to claim 1, characterized in that: The connection area is arranged around the installation area; or... The connection area is located on one side of the installation area.

3. The projector according to claim 1, characterized in that: The end of the second part that is furthest from the first part is at least partially located in the external space of the outer casing; And / or, The end of the second part closest to the first part abuts against the connecting area.

4. The projector according to claim 1, characterized in that: The optical-mechanical lens has a first optical axis, and the external lens has a second optical axis; when the second part is connected to the connection area, the second optical axis and the first optical axis at least partially coincide.

5. The projector according to claim 4, characterized in that: The optical engine lens includes a first positioning part, the first part including a second positioning part, the second positioning part being used to position and cooperate with the first positioning part so that the first optical axis and the second optical axis at least partially coincide.

6. The projector according to claim 5, characterized in that: The first positioning part and the second positioning part are positioned and connected by at least one of the following methods: threaded connection, snap-fit ​​connection, and adsorption connection.

7. The projector according to any one of claims 1 to 6, characterized in that: The connection area is provided with a first connection part, and the second part includes a second connection part, which is detachably connected to the first connection part.

8. The projector according to claim 7, characterized in that: The first connecting part and the second connecting part are detachably connected by at least one of threaded connection, snap-fit ​​connection, and adsorption connection. And / or, There are multiple first connecting parts and multiple second connecting parts. The number of second connecting parts is the same as the number of first connecting parts, and each second connecting part is detachably connected to a corresponding first connecting part.

9. The projector according to any one of claims 1 to 6, characterized in that: The projector also includes a decorative element detachably connected to the connection area. The decorative element has a closed state that seals the mounting area and an open state that opens the mounting area. When the decorative element is in the closed state, the external lens is separated from the connection area; When the decorative element is in the open state, the external lens is connected to the connection area.

10. The projector according to claim 9, characterized in that: The decorative element is slidably disposed on the outer casing; Alternatively, one side of the decorative element may be rotatably connected to the housing; Alternatively, the decorative element can be snapped into the outer casing; Alternatively, the decorative element may be threaded onto the housing; Alternatively, the decorative part may be provided with a first adsorption part, and the outer shell may be provided with a second adsorption part, wherein the second adsorption part is used to adsorb onto the first adsorption part.

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