Projector

Abstract

The utility model relates to a projector which comprises a shell, an optical machine assembly and an external lens. The shell is provided with a containing cavity and an opening, and the opening is used for communicating the containing cavity with the external space of the shell. And the ray machine assembly is arranged in the accommodating cavity and comprises a ray machine lens. One end of the external lens penetrates through the opening, is matched with the ray machine lens shaft hole and is used for being matched with the ray machine lens to carry out image projection; the external lens is detachably installed on the ray machine assembly.

Description

Technical Field

[0001] This disclosure relates to the field of projector technology, and more particularly 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 can achieve the projection ratio adjustment function of the projector at a low cost while ensuring image projection quality.

[0004] This disclosure relates to a projector, including a housing, an optical engine assembly, and an external lens. The housing has a receiving cavity and an opening, the opening connecting the receiving cavity to an external space. The optical engine assembly is disposed in the receiving cavity and includes an optical engine lens. One end of the external lens passes through the opening and engages with the optical engine lens shaft hole for projecting an image in conjunction with the optical engine lens; the external lens is detachably mounted to the optical engine assembly.

[0005] Beneficial Effects: The projector disclosed herein can, according to user needs, project images either independently using the optical engine assembly or in conjunction with an external lens. When the optical engine assembly projects independently, its location within the housing ensures good protection. When projecting images in conjunction with an external lens, the external lens passes through an opening and directly engages with the optical engine lens via a shaft hole. This shortens the assembly tolerance chain between the external and optical engine lenses, reducing their misalignment and improving projection quality. Connecting the external lens directly to the optical engine assembly reduces the likelihood of lens wobble relative to the optical engine lens, further enhancing positional stability and improving image projection quality. Attached Figure Description

[0006] 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.

[0007] Figure 1 This is a schematic diagram of the structure of a projector in one embodiment provided in this disclosure.

[0008] Figure 2This 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.

[0009] 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.

[0010] Figure 4 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.

[0011] Figure 5 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.

[0012] Figure 6 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.

[0013] Figure 7 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.

[0014] Figure 8 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.

[0015] Figure 9 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.

[0016] 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.

[0017] Figure 11 yes Figure 10 A schematic diagram of the explosion structure.

[0018] 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.

[0019] Figure 13 yes Figure 12 A schematic diagram of the explosion structure.

[0020] Figure 14 This is a cross-sectional view of an external lens, an optical-mechanical lens, a first positioning part, and a second positioning part in another embodiment provided in this disclosure.

[0021] Figure 15This is a schematic diagram of the structure of an external lens, an optical engine lens, a first connecting part, and a second connecting part in one embodiment provided in this disclosure.

[0022] Figure 16 This is a schematic diagram of the structure of the external lens, the optical engine lens, the first connecting part, and the second connecting part in another embodiment provided in this disclosure.

[0023] Figure 17 This is a schematic diagram of the structure of the external lens, the optical engine lens, the first connecting part, and the second connecting part in another embodiment provided in this disclosure.

[0024] Figure 18 This is a cross-sectional view of the external lens, the optical engine lens, the first connecting part, and the second connecting part in another embodiment provided in this disclosure.

[0025] Figure 19 This is a schematic diagram of the structure of the external lens, the optical engine lens, the first connecting part, and the second connecting part in another embodiment provided in this disclosure.

[0026] Figure 20 This is a schematic diagram of the structure of the optical engine component, external lens, first connecting part and second connecting part in another embodiment provided in this disclosure.

[0027] Figure 21 yes Figure 20 A schematic diagram of the explosion structure.

[0028] Figure 22 This is a schematic diagram of the structure of the external lens, the optical engine lens, the first connecting part, and the second connecting part in another embodiment provided in this disclosure.

[0029] Figure 23 yes Figure 22 A schematic diagram of a localized explosion structure.

[0030] Figure 24 yes Figure 22 A partial sectional view.

[0031] Explanation of reference numerals in the attached figures:

[0032] 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 assembly; 21. Optical-mechanical lens; 22. Optical-mechanical housing; 23. Adapter; 30. External lens; 31. Enclosure; 41. First connecting part; 41a. Snap-fit ​​surface; 41b. External threaded surface area; 41c. Snap-fit ​​hole; 42. Second connecting part; 421. First connecting section; 422. First engaging section; 423. Second connecting section; 424. Second engaging section; 42c. Second snap-fit; 42a. First snap-fit; 42b. Internal threaded surface area; 51. First positioning part; 51a. First mating end; 52. Second positioning part; 52a. Second mating end; 61. Fastener; 71. Positioning element; C1. Guide groove; C2. Positioning groove; C31. First mating groove; C32. Second mating groove; C4. Groove;

[0033] C5, Insertion slot; C6, Positioning port; 80, Decorative part; 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 suction part; 84, Pivot; 90, Detection part; L1, First optical axis; L2, Second optical axis; K1, Opening; Q, Receiving cavity; K31, First connecting hole; K32, Second connecting hole; K41, First positioning hole; K42, Second positioning hole; K8, Through hole; P1, First threaded surface; P2, Second threaded surface. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 lenses are expensive, and with an external lens, the alignment between the lens and the projector's optical engine lens is not precise due to product tolerances and dimensional errors after assembly. This can lead to a decrease in projection quality after adjusting the throw ratio.

[0038] 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 assembly 20, and an external lens 30. The housing 10 has a receiving cavity Q and an opening K1. The opening K1 connects the receiving cavity Q to the external space of the housing 10. The optical engine assembly 20 is disposed in the receiving cavity Q. The optical engine assembly 20 includes an optical engine lens 21. One end of the external lens 30 passes through the opening K1 and mates with the shaft hole of the optical engine lens 21 for image projection in conjunction with the optical engine lens 21. The external lens 30 is detachably mounted to the optical engine assembly 20. Specifically, Figure 2 The diagram shown is a schematic of the projector 100 projecting an image independently through the optical engine lens 21. Figure 3 The diagram shown illustrates the interaction between the external lens 30 and the optical engine lens 21 in the projector 100. The external lens 30 can work in conjunction with the optical system of the optical engine assembly 20 to change the projection ratio of the image, thereby increasing the applicability of the projector 100.

[0039] According to the projector 100 disclosed herein, image projection can be performed either independently by the optical engine assembly 20 or in conjunction with an external lens 30, depending on the user's needs. When the optical engine assembly 20 projects independently, it is located within the housing cavity Q, ensuring good protection for the assembly from the housing. When the optical engine assembly 20 is used in conjunction with the external lens 30 for image projection, the external lens 30 passes through the opening K1 and directly engages with the optical engine lens 21 via a axial hole. This shortens the assembly tolerance chain between the external lens 30 and the optical engine lens 21, reducing the fitting error and thus improving the projection effect of the projector 100.

[0040] Furthermore, directly connecting the external lens 30 to the optical engine assembly 20 reduces the possibility of the external lens 30 shaking relative to the optical engine lens 21, further improving the positional stability between the external lens 30 and the optical engine lens 21, thereby improving the projection effect. At the same time, the external lens 30 is inexpensive, allowing the projector 100 of this disclosure to balance low cost and high image projection effect, thus achieving an adjustable throw ratio.

[0041] 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.

[0042] Optionally, the housing 10 includes a front wall 11. An opening K1 is formed in the front wall 11.

[0043] In some embodiments, see Figure 1 The projector 100 also includes a detection element 90. The detection element 90 is used to detect the position information of the external lens 30 relative to the optical engine lens 21. 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.

[0044] Optionally, the detection element 90 can be configured as a position detection component such as an infrared detector or a Hall detector.

[0045] 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 optomechanical assembly 20.

[0046] See Figures 2 to 3 The projector 100 also includes a decorative element 80. The decorative element 80 is detachably connected to the opening K1 and has a closed state (closing the opening K1) and an open state (opening the opening K1); wherein, see... Figure 2 When the decorative element 80 is in the closed state, the external lens 30 is separated from the optical-mechanical assembly 20. (See also...) Figure 3 When the decorative element 80 is in the open state, the external lens 30 is connected to the optical engine assembly 20.

[0047] Thus, when the decorative element 80 is in the closed state, the decorative element 80 can close the opening K1 to close the receiving cavity Q (see...). Figure 1 and Figure 2 This improves the dustproof effect of the housing cavity Q and ensures the operational reliability of the optical engine assembly 20 and other internal structures of the projector 100. When the user needs to adjust the projection ratio, the decorative part 80 can be easily removed to allow the external lens 30 to pass through the opening K1 and connect to the optical engine assembly 20, cooperating with the optical engine lens 21 to achieve the adjustment of the projection ratio.

[0048] Optionally, see Figure 1The 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 an example, see [example not provided]. 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.

[0049] Optionally, see Figure 4 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.

[0050] In some embodiments, the decorative element 80 is slidably disposed on the housing 10.

[0051] Optionally, see Figure 4 The 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 opening K1 until the opening K1 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 opening K1 until the opening K1 is blocked, the decorative piece 80 is in a closed state.

[0052] Optionally, the opening direction of the guide groove C1 is set along the radial direction of the through hole K8.

[0053] Optionally, see Figure 4 There are two guide parts 83a. The two guide parts 83a are respectively connected to the two sides of the decorative shell 81. There are two guide strips 12a. The two guide strips 12a are respectively provided on the two sides of the opening K1. Each guide strip 12a is matched with the guide groove C1 of the corresponding guide part 83a.

[0054] In some embodiments, the decorative element 80 is rotatably disposed on the housing 10.

[0055] Optionally, see Figure 1 and Figure 5The 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 axis of the opening K1. In this way, the decorative piece 80 can be flipped relative to the opening K1, thereby being able to rotate to an open or closed state.

[0056] In some embodiments, the decorative element 80 snaps into the housing 10.

[0057] Optionally, see Figure 6 The first mating part 12 has a snap-fit ​​hole 12c. The second mating part 83 includes a snap-fit ​​part 83c. The snap-fit ​​part 83c snaps into the snap-fit ​​hole 12c. In another embodiment, the first mating part 12 includes a snap-fit ​​part 83c. The second mating part 83 has a snap-fit ​​hole 12c. The specific structure of the snap-fit ​​part 83c can be referred to known snap-fit ​​components, and will not be described in detail here.

[0058] In some embodiments, the decorative element 80 is threaded to the housing 10.

[0059] Optionally, see Figure 6 The first mating part 12 includes a fixing hole 12d formed in the front wall 11, 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.

[0060] Optionally, see Figure 7 The first mating part 12 includes a first threaded surface P1, and the second mating part 83 includes a second threaded surface P2. The first threaded surface P1 and the second threaded surface P2 are threadedly engaged. For example, the first threaded surface P1 is an internal thread located on the inner surface of the opening K1, and the second threaded surface P2 is located on the outer surface of the part of the decorative shell 81 that extends into the opening K1. The external thread and the internal thread are threadedly engaged, thereby realizing the threaded connection between the decorative part 80 and the shell 10.

[0061] In some embodiments, the decorative element 80 is attached to the housing 10.

[0062] Optionally, see Figure 7 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. Both the first adsorption part 12e and the second adsorption part 83e can be constructed as permanent magnets, electromagnets, Velcro, or other components capable of mutual adsorption. Optionally, the first adsorption part 12e is embedded at the edge of the opening K1 in the front wall 11. The second adsorption part 83e is embedded on the end face of the decorative shell 81.

[0063] In some embodiments, see Figure 8 The optical-mechanical lens 21 has a first optical axis L1. The external lens 30 has a second optical axis L2. When the external lens 30 is connected to the optical-mechanical assembly 20, the second optical axis L2 and the first optical axis L1 at least partially coincide.

[0064] This improves the alignment accuracy between the external lens 30 and the optical engine lens 21, thereby enhancing the image projection effect of the projector 100.

[0065] Specifically, the first optical axis L1 is the optical axis of the optical-mechanical lens 21. The second optical axis L2 is the optical axis of the lens 82.

[0066] 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.

[0067] 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.

[0068] In some embodiments, see Figure 8 The optical-mechanical lens 21 includes a first positioning part 51. The external lens 30 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.

[0069] 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 axis L1, and the distance between each first positioning part 51 and the first axis L1 is the same. The second positioning parts 52 are distributed around the second axis L2, and the distance between each second positioning part 52 and the second 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 axis L1 and the second axis L2 can be improved.

[0070] 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 assembly 20, and enhances the ease of use of the projector 100.

[0071] See below. Figures 8 to 14 The positioning and engagement method of the first positioning unit 51 and the second positioning unit 52 is described. It is understood that the optical-mechanical lens 21 and the external lens 30 can be positioned simultaneously using any one or more of the positioning and engagement methods described below.

[0072] In some embodiments, see Figure 8 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.

[0073] 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.

[0074] In some embodiments, see Figure 9 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 positioning member 71. The 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 positioning member 71 is inserted into the first positioning hole K41 and the second positioning hole K42, thereby achieving the positioning engagement between the first positioning part 51 and the second positioning part 52.

[0075] Specifically, the first positioning hole K41 extends through the first positioning portion 51 along the extension direction of the first axis L1. The second positioning hole K42 extends through the second positioning portion 52 along the extension direction of the second 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.

[0076] The positioning element 71 can be specifically set as a positioning pin or a positioning screw.

[0077] In some embodiments, see Figure 10 and Figure 11 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.

[0078] Specifically, Figure 10 and Figure 11In the illustrated embodiment, the positioning groove C2 extends through the first positioning part 51 along the extension direction of the first 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 axis L2.

[0079] In some embodiments, see Figure 12 and Figure 13 The external lens 30 has a first mating groove C31 formed at the end near the optical-mechanical lens 21. The end of the optical-mechanical lens 21 near the external lens 30 mates with the shaft hole of the first mating groove C31. In this way, the shaft hole mating between the external lens 30 and the optical-mechanical lens 21 is achieved.

[0080] For example, the first positioning part 51 includes a first mating end 51a. The first mating end 51a is located at the end of the optical-mechanical lens 21 facing the external lens 30. The second positioning part 52 includes a first mating groove C31. The first mating groove C31 is formed at the end of the external lens 30 facing the optical-mechanical lens 21, and the first mating end 51a is used for positioning and mating with the first mating groove C31. For example, the first mating end 51a can be inserted into the first mating groove C31 from the opening of the first mating groove C31, thereby positioning the optical-mechanical lens 21 and the external lens 30.

[0081] 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 first mating groove C31 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 first mating groove C31 is approximately the same as the cross-section of the first mating end 51a. Thus, after the first mating end 51a and the first mating groove C31 are mated together, the first central axis and the second central axis approximately coincide, thereby achieving the approximate coincidence of the first optical axis L1 and the second optical axis L2.

[0082] In some embodiments, see Figure 14 The optical-mechanical lens 21 has a second mating groove C32 formed at the end near the external lens 30. The end of the external lens 30 near the optical-mechanical lens 21 mates with the shaft hole of the second mating groove C32. In this way, the shaft hole mating between the external lens 30 and the optical-mechanical lens 21 is achieved.

[0083] For example, the first positioning part 51 includes a second mating groove C32, which is formed at one end of the optical-mechanical lens 21 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 21, and is used for positioning and mating with the second mating groove C32. For example, the second mating end 52a can be inserted into the second mating groove C32 from the opening of the second mating groove C32, thereby positioning the optical-mechanical lens 21 and the external lens 30.

[0084] Specifically, the second mating groove C32 has a first central axis (not shown in the figure), and the first central axis coincides with the first optical axis L1. The second mating end 52a 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 second mating groove C32 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 second mating groove C32 are mated together, 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.

[0085] The following is combined with Figures 15 to 24 The detachable connection method between the external lens 30 and the optical-mechanical assembly 20 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 optical-mechanical assembly 20 and the external lens 30.

[0086] In some embodiments, the optical engine assembly 20 includes a first connecting portion 41, and the external lens 30 includes a second connecting portion 42, which is detachably connected to the first connecting portion 41. This ensures the installation stability of the external lens 30.

[0087] 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.

[0088] The following reference Figures 15 to 19 The specific structure of the first connecting part 41 located on the optical-mechanical lens 21 is described.

[0089] See Figure 15 There are multiple first connecting parts 41 and multiple second connecting parts 42. The first connecting parts 41 are disposed on the outer peripheral surface of the optical-mechanical lens 21 along its circumference. The second connecting parts 42 are disposed on the outer peripheral surface of the external lens 30 along its circumference. Each second connecting part 42 is connected to a corresponding first connecting part 41. This improves the reliability of the connection position between the external lens 30 and the optical-mechanical lens 21.

[0090] In some embodiments, see Figure 15 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.

[0091] In some embodiments, see Figure 16 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 61. The fastener 61 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 61 may be a fastening member such as a screw or a pin.

[0092] In some embodiments, see Figure 17 and Figure 18 The first connecting part 41 includes a snap-fit ​​surface 41a. The snap-fit ​​surface 41a is located on the optical engine lens 21 facing the opening K1 (see...). Figures 1 to 3 One end of the second connecting part 42 includes a first snap fastener 42a. The first snap fastener 42a engages with the snap-fit ​​surface 41a.

[0093] Optionally, the external lens 30 includes a enclosure 31. The enclosure 31 defines a insertion slot C5. The insertion slot C5 is used for insertion and mating with the optical-mechanical lens 21. A first latch 42a connects to the enclosure 31 and extends toward the optical-mechanical lens 21. Thus, as the optical-mechanical lens 21 extends into the insertion slot C5, it can provide insertion and positioning for the optical-mechanical lens 21 and the external lens 30. Simultaneously, upon insertion, the first latch 42a engages with the latching surface 41a, realizing the connection between the external lens 30 and the optical-mechanical lens 21. This improves the assembly efficiency of the external lens 30 and the optical-mechanical lens 21.

[0094] Optionally, a groove C4 is formed on the end face of the enclosure 31. The first latch 42a includes a first connecting section 421 and a first engaging section 422. The first connecting section 421 connects to the bottom surface of the groove C4. The first engaging section 422 connects to the end of the first connecting section 421 that faces away from the bottom surface of the groove. The first engaging section 422 extends toward the inside of the insertion slot C5. Thus, during the insertion process of the optical engine lens 21 and the external lens 30, the optical engine lens 21 can push the first engaging section 422 to deflect toward the outside of the insertion slot C5 until the first engaging section 422 engages with the latching surface 41a.

[0095] In other embodiments, the first connecting portion 41 may also have a hole for engaging with the first buckle 42a.

[0096] In some embodiments, see Figure 19 In the first connecting part 41 and the second connecting part 42, one of them includes an internal thread surface area 42b and the other includes an external thread surface area 41b, and the external thread surface area 41b and the internal thread surface area 42b are threadedly engaged.

[0097] Specifically, Figure 19In the illustrated embodiment, the first connecting portion 41 is the external threaded surface area 41b of the optical engine lens 21. The external lens 30 is provided with a insertion groove C5. The second connecting portion 42 is the internal threaded surface area 42b of the inner circumferential surface of the insertion groove C5.

[0098] The following reference Figures 20 to 24 Some other embodiments of the connection between the first connecting part 41 and the second connecting part 42 are described.

[0099] In some embodiments, see Figure 20 The optical-mechanical assembly 20 includes an optical-mechanical housing 22, an optical-mechanical lens 21, and an adapter 23. The optical-mechanical housing 22 is used to house other optical components. The optical-mechanical lens 21 is connected to the optical-mechanical housing 22. One end of the adapter 23 is connected to the optical-mechanical housing 22. The other end of the adapter 23 has a positioning port C6. The optical-mechanical lens 21 is fitted into the positioning port C6.

[0100] Specifically, the through-path of the positioning port C6 is parallel to the first axis L1. In this way, the optical-mechanical lens 21 and the adapter 23 can be radially positioned in the positioning port C6.

[0101] The first connecting part 41 may be located at any one or more of the other end of the optical engine lens 21, the optical engine housing 22, or the adapter 23.

[0102] In some embodiments, see Figure 20 The first connecting part 41 and the second connecting part 42 can be connected by adsorption. The specific structure of the first connecting part 41 and the second connecting part 42 can be referred to the above-described embodiments, and will not be repeated here.

[0103] In some embodiments, see Figure 21 The number of first connecting parts 41 is at least two. At least two first connecting parts 41 are disposed on the adapter 23 along the outer periphery of the positioning port C6. In this way, the connection stability between the first connecting parts 41 and the second connecting parts 42 can be improved.

[0104] In some embodiments, see Figure 21 The positioning port C6 is designed as an open opening so that the optical engine lens 21 can be inserted into the adapter 23 from above the positioning port C6.

[0105] In some embodiments, see Figure 21 The first connecting part 41 is provided with a first connecting hole K31, and the second connecting part 42 is provided with a second connecting hole K32. The projector 100 also includes a fastener 61. The fastener 61 is detachably connected to the first connecting part 41 and the second connecting part 42 through the first connecting hole K31 and the second connecting hole K32.

[0106] In some embodiments, see Figure 22The positioning port C6 is a closed opening, and the optical engine lens 21 can pass through the positioning port C6 from one side of the adapter 23 to cooperate with the positioning hole.

[0107] In some embodiments, see Figures 22 to 24 The second connecting part 42 engages with the first connecting part 41.

[0108] The first connecting portion 41 includes a locking hole 41c formed in the connector. The second connecting portion 42 includes a second latch 42c. The second latch 42c passes through the locking hole 41c and engages with the connector.

[0109] Optionally, the second latch 42c includes a second connecting section 423 and a second engaging section 424. The second connecting section 423 connects to one end of the external lens 30. The second engaging section 424 connects to the end of the second connecting section 423 opposite to the external lens 30. The second connecting section 423 mates with the latch hole 41c. The second engaging section 424 is located at the end of the adapter 23 opposite to the external lens 30 and abuts against the adapter 23. In this way, a reliable latching engagement is achieved between the second latch 42c and the adapter 23.

[0110] 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: An outer casing having a receiving cavity and an opening for communicating the receiving cavity with the external space of the outer casing; An optical-mechanical assembly, wherein the optical-mechanical assembly is disposed in the receiving cavity, and the optical-mechanical assembly includes an optical-mechanical lens; An external lens, one end of which passes through the opening and engages with the optical engine lens shaft hole, is used to project images in conjunction with the optical engine lens; the external lens is detachably mounted to the optical engine assembly.

2. The projector according to claim 1, characterized in that: The external lens has a first mating groove at one end near the optical engine lens, and the end of the optical engine lens near the external lens mates with the shaft hole of the first mating groove. or, The optical engine lens has a second mating groove at one end near the external lens, and the end of the external lens near the optical engine lens mates with the shaft hole of the second mating groove.

3. The projector according to claim 1, characterized in that: The optical engine assembly includes a first connecting portion, and the external lens includes a second connecting portion, the second connecting portion being detachably connected to the first connecting portion; wherein: The first connecting part is disposed on the optical engine lens; or, The optomechanical assembly includes an optomechanical housing, and the first connecting portion is disposed on the optomechanical housing; or, The optomechanical assembly includes an optomechanical housing and an adapter, one end of which is connected to the optomechanical housing, and the first connecting part is located at the other end of the adapter.

4. The projector according to claim 3, characterized in that: The other end of the adapter has a positioning port, and the optical engine lens is at least partially located in the positioning port.

5. The projector according to claim 4, characterized in that: The number of the first connecting parts is at least two, and each of the first connecting parts is disposed on the adapter along the outer periphery of the positioning port.

6. The projector according to claim 3, 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.

7. The projector according to any one of claims 1 to 6, characterized in that: The optical engine lens has a first optical axis, and the external lens has a second optical axis. When the external lens is connected to the optical engine assembly, the second optical axis and the first optical axis at least partially coincide.

8. The projector according to claim 7, characterized in that: The optical engine lens includes a first positioning part, and the external lens includes a second positioning part. The second positioning part is used to position and connect with the first positioning part so that the first optical axis and the second optical axis at least partially coincide.

9. The projector according to any one of claims 1 to 6, characterized in that: The projector, including the optical engine lens, further includes a decorative element detachably connected to the opening. The decorative element has a closed state (closing the opening) and an open state (opening the opening); wherein... When the decorative element is in the closed state, the external lens is separated from the optical-mechanical assembly; When the decorative element is in the open state, the external lens is connected to the optical engine assembly.

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 outer shell may be provided with a first adsorption part, and the decorative part may be provided with a second adsorption part, wherein the second adsorption part is used to adsorb and cooperate with the first adsorption part.

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