A lens structure

Abstract

The present invention discloses a lens structure, comprising a lens barrel, a lens module disposed within the lens barrel, and a detachable diaphragm mounted within the lens barrel. At least two rotating slot structures are circumferentially spaced apart on the inner wall of one end of the lens barrel. Each rotating slot structure includes a connected mounting guide notch and a limiting slot, with the limiting slot and the mounting guide notch being circumferentially staggered. At least two engaging portions corresponding to the rotating slot structures are provided on the circumferential wall of the diaphragm. When the diaphragm is installed, the rotating diaphragm and the engaging portions slide into the corresponding mounting guide notches and are retained within the limiting slots. Compared to a capping method, the present invention is compact, small, and takes up less space. It is conducive to the development of lightweight and miniaturized products equipped with lens structures. Furthermore, the installation and removal process is simpler and more flexible.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical electronic products, and in particular relates to a lens structure. Background Art

[0002] Currently, in the field of DLP projectors and AR optical machines, due to stray light issues, an external aperture is often installed at the end of the lens using a cap (the so-called aperture refers to an entity that limits the light beam in an optical system). Many products are now moving towards lightweight and miniaturization, especially AR optical machines, where internal space is limited and every inch of land is valuable. The cap method takes up a lot of space, which is not conducive to the development of products in the direction of lightweight and miniaturization. In addition, due to the severe heat generation of the optical machine and the lack of heat dissipation effect of the existing aperture and lens structure, the temperature of the lens area can often reach 50°C or even higher. The thermal expansion coefficient of some plastic lens barrels is usually large, and the lens installed inside the barrel will shift as the barrel expands and contracts. Coupled with the temperature drift of the lens itself, the resolution of the lens is greatly reduced. Summary of the Invention

[0003] In order to overcome at least one of the deficiencies in the above-mentioned prior art, the present invention provides a lens structure; the structure is compact and occupies little space.

[0004] In order to solve the problems existing in the above-mentioned prior art, an embodiment of the present invention provides a lens structure, comprising a lens barrel, a lens module disposed in the lens barrel, and a diaphragm detachably mounted in the lens barrel;

[0005] At least two rotation slot structures are circumferentially recessed on the inner wall of one end of the lens barrel, each of the rotation slot structures comprising a connecting installation guide notch and a limiting slot, wherein the limiting slot and the installation guide notch are circumferentially staggered.

[0006] At least two engaging parts corresponding to the rotating slot structures are provided on the peripheral wall of the diaphragm; when the diaphragm is installed, the diaphragm is rotated and the engaging parts slide into the corresponding installation guide slots and are limited in the limiting slots.

[0007] Furthermore, the engaging portion has a V-shaped structure.

[0008] Furthermore, the installation guide groove includes a first groove bottom surface, two first side walls arranged circumferentially at intervals, a guide inclined wall surface located between the two first side walls, and an opening portion opposite to the guide inclined wall surface; the limiting groove includes a second groove bottom surface coplanar with the first groove bottom surface, two second side walls arranged circumferentially at intervals, and two limiting walls arranged axially at intervals; a connecting notch is provided on the second side wall surface adjacent to the installation guide groove for realizing the connection between the installation guide groove and the limiting groove.

[0009] Furthermore, the aperture includes an annular body, and the outer peripheral wall of the annular body is provided with the clamping portion and the clamping avoidance opening.

[0010] Furthermore, a heat dissipation fin is provided on an end surface of the annular body facing away from the lens module.

[0011] Furthermore, the diaphragm includes a cylindrical body, one end of which is an open end, and the other end is provided with a light-through hole; an annular edge portion is provided on the open end, and the outer peripheral wall of the annular edge portion is provided with the locking portion and the clamping avoidance opening.

[0012] Furthermore, the outer peripheral wall of the cylinder is provided with heat dissipation fins.

[0013] Furthermore, the lens barrel includes a body and a heat-conducting structure embedded in the body, the inner circumference of the heat-conducting structure abuts against the lens module, and the top end abuts against one end of the aperture facing the lens module.

[0014] Furthermore, the heat-conducting structure includes an annular support frame and a plurality of heat-conducting plates arranged circumferentially and extending axially; one end of the aperture facing the lens module abuts against the annular support frame, and the heat-conducting plate abuts against the lens module; the inner wall of the main body is provided with an annular groove adapted to the annular support frame and a heat-conducting plate mounting groove adapted to the heat-conducting plate.

[0015] Furthermore, the lens barrel has a first mounting cavity and a second mounting cavity arranged coaxially; a first step surface is formed between the first mounting cavity and the second mounting cavity; the rotating slot structure is arranged on the inner wall of the first mounting cavity, and the lens module is arranged in the second mounting cavity; after the diaphragm is installed in place, an end face of the diaphragm facing the lens module abuts against the first step surface.

[0016] As a result of adopting the above technical solution, the beneficial effects achieved are as follows:

[0017] The lens structure of the present invention includes a lens barrel, a lens module arranged in the lens barrel, and an aperture detachably mounted in the lens barrel; at least two rotating slot structures are circumferentially spaced apart and recessed on the inner wall of one end of the lens barrel, each rotating slot structure including a connected mounting guide slot and a limiting slot, with the limiting slot and the mounting guide slot being circumferentially staggered; at least two engaging portions corresponding to the rotating slot structures are provided on the peripheral wall of the aperture; when the aperture is mounted, the rotating aperture and the engaging portions slide into the corresponding mounting guide slots and are limited in the limiting slots.

[0018] In this invention, the diaphragm is mounted within the lens barrel. Compared to a cap-mounted lens, the overall lens structure is compact, small, and takes up less space. This facilitates the development of lightweight and miniaturized products incorporating lens structures. Furthermore, the diaphragm is removable by utilizing a locking mechanism and a rotating slot structure, making installation and removal simpler and more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 1 is a schematic structural diagram of a first embodiment of the lens structure of the present invention;

[0021] Figure 2 yes Figure 1 A half-section view of

[0022] Figure 3 yes Figure 1 Cross-sectional view of the middle lens barrel;

[0023] Figure 4 yes Figure 1 An enlarged schematic diagram of a rotating slot structure;

[0024] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle aperture;

[0025] Figure 6 yes Figure 1 A reference diagram of the state when preparing for installation;

[0026] Figure 7 is a schematic structural diagram of the diaphragm in the second embodiment of the lens structure of the present invention;

[0027] Figure 8 is a structural cross-sectional view of a third embodiment of the lens structure of the present invention;

[0028] Figure 9 yes Figure 8 Schematic diagram of the structure of the middle aperture;

[0029] Figure 10 is a schematic structural diagram of a diaphragm in a fourth embodiment of the lens structure of the present invention;

[0030] Figure 11 1 is a cross-sectional view of the structure of the fifth embodiment of the lens structure of the present invention (with the aperture hidden);

[0031] Figure 12 yes Figure 11 Diagram of the coordination between the heat conducting structure and the aperture;

[0032] Among them, 1-lens barrel, 11-first mounting cavity, 111-first step surface, 12-second mounting cavity, 121-first hole section, 122-second hole section, 123-third hole section, 124-fourth hole section, 125-second step surface, 126-third step surface, 127-fourth step surface, 13-body, 14-heat conducting structure, 141-annular support frame, 142-heat conducting sheet, 2-lens module, 21-first lens, 22-second lens, 23-third lens, 3-first aperture, 31-annular body, 32-first A latching protrusion, 33-first clamping avoidance opening, 34-first V-shaped structure, 4-rotating latching groove structure, 41-installation guide groove opening, 411-first groove bottom surface, 412-first side wall surface, 413-guide inclined wall surface, 42-limiting groove, 421-second groove bottom surface, 422-second side wall surface, 423-limiting wall surface, 43-connecting gap, 5-second aperture, 51-cylinder, 511-light-through hole, 52-annular edge portion, 53-second latching protrusion, 54-second clamping avoidance opening, 55-second V-shaped structure, 6-heat dissipation fins. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that if the present invention involves descriptions such as "first", "second", etc., such descriptions are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0035] Depend on Figures 1 to 3 As shown together, the basic embodiment of the present invention showing the main concept discloses a lens structure, including a lens barrel 1, a lens module 2 arranged in the lens barrel 1, and an aperture detachably mounted in the lens barrel 1 (that is, the aperture is partially or completely located in the lens barrel 1); at least two rotating card slot structures 4 are circumferentially spaced and recessed on the inner wall of one end of the lens barrel 1, each rotating card slot structure 4 includes a connected installation guide notch 41 and a limiting groove 42, and the limiting groove 42 is circumferentially staggered with the installation guide notch 41; at least two engaging portions corresponding to the rotating card slot structures 4 are provided on the peripheral wall of the aperture; when the aperture is installed (see Figure 6), place the diaphragm on the end of the lens barrel 1 provided with the rotating slot structure 4, align the engaging portion axially and place it in the installation guide slot 41; then rotate the diaphragm, the engaging portion slides into the corresponding installation guide slot 41 and is limited in the limiting slot 42 to achieve a stable connection (see Figure 1 When disassembling, rotate the diaphragm in the opposite direction, and the engaging portion slides out from the corresponding limiting groove 42 to the installation guide groove 41, and then the diaphragm can be removed axially.

[0036] The diaphragm is partially or completely mounted within the lens barrel 1. Compared to a cap-mounted lens, the overall lens structure is compact, small, and takes up less space. This facilitates the lightweighting and miniaturization of products incorporating lens structures. Furthermore, the diaphragm is removable by utilizing a locking portion and a rotating slot structure 4, making installation and removal simpler and more flexible.

[0037] In a specific embodiment, Figure 4 As shown, the installation guide slot 41 includes a first slot bottom surface 411, two circumferentially spaced first sidewalls 412, a guide inclined wall surface 413 located between the two first sidewalls 412, and an opening axially spaced from and opposite to the guide inclined wall surface 413 (the opening extends through the end surface of the lens barrel 1 to facilitate axial placement of the engaging portion into the installation guide slot 41). The limiting slot 42 includes a second slot bottom surface 421 coplanar with the first slot bottom surface 411, two circumferentially spaced second sidewalls 422, and two axially spaced limiting walls 423 (located on the side of the opening facing the lens module 2). A connecting notch 43 is provided on the second sidewall 422 adjacent to the installation guide slot 41 for connecting the installation guide slot 41 and the limiting slot 42. The provision of the guide inclined wall surface 413 facilitates the engaging portion to slide smoothly into the limiting slot 42 during rotation and axial movement; the limiting slot 42 is axially limited by the two limiting walls 423.

[0038] In this embodiment, the lens barrel 1 has a first mounting cavity 11 and a second mounting cavity 12 arranged coaxially; a first step surface 111 is formed between the first mounting cavity 11 and the second mounting cavity 12; the rotating slot structure 4 is arranged on the inner wall of the first mounting cavity 11, and the lens module 2 is arranged in the second mounting cavity 12; after the aperture is installed in the first mounting cavity 11, one end surface of the aperture facing the lens module 2 abuts against the first step surface 111, and the first step surface 111 is used to support the aperture, further improving the stability and reliability after installation, and the first step surface 111 can also prevent light from leaking from the gap between the aperture and the inner wall of the first mounting cavity 11.

[0039] In this embodiment, the lens module 2 includes three lenses, namely a first lens 21 , a second lens 22 and a third lens 23 . Figure 3The second mounting cavity 12 shown in the figure includes a first hole section 121, a second hole section 122, a third hole section 123 and a fourth hole section 124 which are arranged in sequence axially and communicate with each other; a first step surface 111 is formed between the first hole section 121 and the first mounting cavity 11; a second step surface 125 is formed between the second hole section 122 and the first hole section 121, a third step surface 126 is formed between the second hole section 122 and the third hole section 123, and a fourth step surface 127 is formed between the third hole section 123 and the fourth hole section 124; the first lens 21 is fixed on the second step surface 125, the second lens 22 is fixed on the third step surface 126, and the third lens 23 is fixed on the fourth step surface 127. Preferably, the aperture of the first hole segment 121 is greater than the aperture of the second hole segment 122 and greater than the aperture of the third hole segment 123; the aperture of the fourth hole segment 124 is greater than the aperture of the third hole segment 123; such an arrangement makes it easier to install the three lenses. During installation, the second lens 22 is installed first, then the first lens 21, and then the lens barrel 1 is inverted to install the third lens 23.

[0040] In some embodiments, Figure 5 As shown, the aperture is referred to as the first aperture 3 and comprises an annular body 31 (planar, circular). The outer circumferential wall of the annular body 31 is provided with a snap-fitting portion (a first snap-fitting protrusion 32). The first aperture 3 is entirely located within the lens barrel 1, making it suitable for use in scenarios where the aperture is relatively close. Preferably, the two end faces of the first snap-fitting protrusion 32 correspond to and are flush with the two end faces of the annular body 31 (consistent thickness). A retaining wall 423 is coplanar with the first stepped surface 111. When installed, the end face of the annular body 31 facing the lens module 2 abuts the first stepped surface 111, while the end face of the first snap-fitting protrusion 32 facing the lens module 2 abuts the corresponding retaining wall 423. In some other embodiments, the first latching protrusion 32 is located in the middle of the annular body 31, and a limiting wall 423 is located on the side of the first step surface 111 facing away from the lens module 2. After installation, the end surface of the annular body 31 facing the lens module 2 abuts the first step surface 111, and the end surface of the first latching protrusion 32 facing the lens module 2 abuts the corresponding limiting wall 423. Preferably, the outer peripheral wall of the annular body 31 is provided with a clamping avoidance opening (referred to as the first clamping avoidance opening 33). This arrangement facilitates the operation of the workpiece to clamp and install the first aperture 3. The first clamping avoidance openings 33 are preferably arranged in two symmetrical positions, or in three positions at equal intervals.

[0041] In a specific embodiment, Figure 7As shown, the engaging portion is preferably a V-shaped structure, namely, a first V-shaped structure 34 is provided on the outer peripheral wall of the annular body 31. With this arrangement, when the first V-shaped structure 34 engages the retaining groove 42, it exerts a squeezing force on the upper retaining wall 423 due to its inherent elasticity, locking the aperture in place and improving the stability and reliability of the aperture once installed. In another specific embodiment, a circle of heat dissipation fins 6 is provided on the end surface of the annular body 31 facing away from the lens module 2. This arrangement provides the first aperture 3 with a heat dissipation function, dissipating heat from the lens barrel 1 through the heat dissipation fins 6 thereon, thereby reducing the temperature of the entire lens structure and effectively preventing the impact of temperature on the lens structure's resolution.

[0042] In some other embodiments, Figure 8 and Figure 9 As shown in the figure, the aperture is referred to as the second aperture 5 and includes a barrel 51, one end of which is an open end and the other end of which is provided with a light-through hole 511; an annular edge portion 52 is provided on the open end, and a locking portion (second locking protrusion 53) is provided on the outer peripheral wall of the annular edge portion 52; the second aperture 5 is mostly located inside the lens barrel 1 (if necessary, it can also be located entirely inside the lens barrel 1), which is suitable for use in scenes where the aperture is relatively far away. Preferably, the two end faces of the second locking protrusion 53 are flush with the two end faces of the annular edge portion 52 (with the same thickness). A limiting wall surface 423 is coplanar with the first step surface 111. After installation, the end face of the annular edge portion 52 facing the lens module 2 abuts against the first step surface 111, and the end face of the second locking protrusion 53 facing the lens module 2 abuts against the corresponding limiting wall surface 423. In some other embodiments, the second latching protrusion 53 is located in the middle of the annular edge portion 52, and a limiting wall 423 is located on the side of the first step surface 111 facing away from the lens module 2. After installation, the end surface of the annular edge portion 52 facing the lens module 2 abuts the first step surface 111, and the end surface of the second latching protrusion 53 facing the lens module 2 abuts the corresponding limiting wall 423. Preferably, the outer peripheral wall of the annular edge portion 52 is provided with a clamping avoidance opening (denoted as a second clamping avoidance opening 54); such an arrangement further facilitates the clamping and installation of the second aperture 5 during workpiece operation. Preferably, two second clamping avoidance openings 54 are arranged symmetrically, or three are arranged at equal intervals.

[0043] In a specific embodiment, Figure 10As shown, the engaging portion is preferably a V-shaped structure, namely, the outer peripheral wall of the annular edge portion 52 is provided with a second V-shaped structure 55. With this arrangement, when the second V-shaped structure 55 engages within the retaining groove 42, it exerts a squeezing force on the upper retaining wall 423 due to its inherent elasticity, locking the aperture in place and improving the stability and reliability of the aperture once installed. In another specific embodiment, a plurality of heat dissipation fins 6 are circumferentially spaced apart on the outer peripheral wall of the barrel 51. This arrangement provides the second aperture 5 with a heat dissipation function, dissipating heat from the lens barrel 1 through the heat dissipation fins 6 thereon, thereby reducing the temperature of the entire lens structure and preventing the influence of temperature on the resolution of the lens structure.

[0044] In some other embodiments, Figure 11 and Figure 12 As shown together, in order to further improve the heat dissipation effect, the present embodiment improves the lens barrel 1 so that it has a heat-conducting function; the improved lens barrel 1 is an injection-molded one-piece structure, including a main body 13 and a heat-conducting structure 14 embedded in the main body 13; the inner circumference of the heat-conducting structure 14 abuts against the lens module 2, and the top end abuts against the end of the aperture facing the lens module 2. The heat from the lens module 2 and the lens barrel 1 can be directly dissipated through the aperture, further improving the heat dissipation effect. Among them, the heat-conducting structure 14 includes an annular support frame 141 and a plurality of circumferentially spaced and axially extended heat-conducting sheets 142; the end of the aperture facing the lens module 2 is in contact with the upper end face of the annular support frame 141 (the upper end face of the annular support frame 141 is equivalent to Figure 3 The annular support frame 141 not only supports the diaphragm, but also plays a role in heat transfer. The heat conducting sheet 142 abuts against the lens module 2. The inner wall of the body is provided with an annular groove adapted to the annular support frame 141 and a heat conducting sheet mounting groove adapted to the heat conducting sheet 142. The structural form of the heat conducting sheet 142 is not limited, as long as it can contact all three lenses in the lens module 2 to achieve the heat conduction function. In addition to the diaphragm installed on the lens barrel 1 Figure 12 In addition to the structure shown, it can also be Figure 5 、 Figure 9 and Figure 10 The structure shown is not limited here.

[0045] The various embodiments in this specification are described in a progressive or parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0046] In summary, compared to capping methods, the lens structure of the present invention is compact, small, and takes up less space. This facilitates the development of lightweight and miniaturized products incorporating lens structures. Furthermore, the installation and removal of the aperture is simpler and more flexible. The aperture also features a heat dissipation function, dissipating heat from the lens barrel and lens module through its heat dissipation fins. This helps lower the temperature of the entire lens structure and effectively prevents temperature from affecting the resolution of the lens structure.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lens structure, characterized in that: It comprises a lens barrel, a lens module arranged in the lens barrel, and a diaphragm detachably mounted in the lens barrel; At least two rotation slot structures are circumferentially recessed on the inner wall of one end of the lens barrel, each of the rotation slot structures comprising a connecting installation guide notch and a limiting slot, wherein the limiting slot and the installation guide notch are circumferentially staggered. At least two engaging portions are provided on the peripheral wall of the diaphragm, which correspond one to one with the rotating slot structure. When the diaphragm is installed, the diaphragm is rotated, and the engaging portions slide into the corresponding installation guide slots and are restrained in the limiting slots. The engaging portion is in a V-shaped structure; The installation guide slot includes a first slot bottom surface, two circumferentially spaced first sidewalls, a guide oblique wall surface located between the two first sidewalls, and an opening portion opposite to the guide oblique wall surface; the limiting slot includes a second slot bottom surface coplanar with the first slot bottom surface, two circumferentially spaced second sidewalls, and two axially spaced limiting wall surfaces; a connecting notch is provided on the second sidewall surface adjacent to the installation guide slot for connecting the installation guide slot and the limiting slot; The lens barrel comprises a body and a heat-conducting structure embedded in the body, wherein the inner circumference of the heat-conducting structure abuts against the lens module, and the top end abuts against one end of the aperture facing the lens module; The heat-conducting structure includes an annular support frame and a plurality of heat-conducting plates arranged circumferentially and extending axially; one end of the aperture facing the lens module abuts against the annular support frame, and the heat-conducting plate abuts against the lens module; an annular groove adapted to the annular support frame and a heat-conducting plate mounting groove adapted to the heat-conducting plate are provided on the inner wall of the main body.

2. The lens structure according to claim 1, characterized in that: The aperture comprises an annular body, and the outer peripheral wall of the annular body is provided with the clamping portion and the clamping avoidance opening.

3. The lens structure according to claim 2, characterized in that: A heat dissipation fin is provided on an end surface of the annular body facing away from the lens module.

4. The lens structure according to claim 1, wherein: The diaphragm includes a cylindrical body, one end of which is an open end, and the other end is provided with a light hole; an annular edge portion is provided on the open end, and the outer peripheral wall of the annular edge portion is provided with the clamping portion and the clamping avoidance port.

5. The lens structure according to claim 4, characterized in that: The outer peripheral wall of the cylinder is provided with heat dissipation fins.

6. The lens structure according to claim 1, wherein: The lens barrel has a first mounting cavity and a second mounting cavity arranged coaxially; a first step surface is formed between the first mounting cavity and the second mounting cavity; the rotating slot structure is arranged on the inner wall of the first mounting cavity, and the lens module is arranged in the second mounting cavity; after the diaphragm is installed in place, an end face of the diaphragm facing the lens module abuts against the first step surface.

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