Projection lens and projection device
By setting up an adjustment unit in the projection lens, the automatic assembly of the inner lens barrel moving axially relative to the outer lens barrel is solved, the problem of low lens assembly efficiency in the prior art is solved, the production line efficiency and resolution are improved, and the lens miniaturization trend is adapted.
Patent Information
- Application Number
- CN202420769987.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-04-15
AI Technical Summary
Due to the installation of multiple groups of lenses in existing laser projection products, it is difficult to achieve automated assembly, resulting in low production line efficiency.
By providing an adjustment unit, including an adjustment ring and an adjustment member, an automated assembly of the axial movement of the inner lens barrel relative to the outer lens barrel is achieved. The adjustment groove on the adjustment ring realizes nonlinear adjustment of the inner lens barrel, reduces the volume of the adjustment ring, and overlaps the adjustment groove on the adjustment ring through the moving groove on the outer lens barrel, further reducing the axial dimension of the lens.
The single-barrel lens for projection lens is automatically assembled front and rear, which improves production line efficiency, and improves resolution through nonlinear adjustment and axial reduction, adapting to the development trend of the lens miniaturization.
Smart Images
Figure CN222939381U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of projection, in particular to a projection lens and a projection device. Background Art
[0002] With the continuous development of society, people's pursuits are constantly changing. Laser projection products are increasingly applied in people's work and life, and the competition of laser projection products is becoming increasingly fierce.
[0003] Currently, in order to achieve the goals of miniaturization and low cost, the lenses in laser projection products reduce the number of group adjustments, thereby reducing the number of components. For conventional micro projection lenses, two or more groups are designed for compensation.
[0004] However, due to the setting of multiple groups, it is difficult to achieve automated assembly. Summary of the Utility Model
[0005] The main purpose of the utility model is to provide a projection lens and a projection device, which enable the automatic front-back assembly of single-lens barrel lenses, effectively improve the production line efficiency, and can also improve the resolution.
[0006] To achieve the above purpose, in the first aspect, the utility model provides a projection lens, including:
[0007] An inner lens barrel;
[0008] An outer lens barrel, which is sleeved on the outer periphery of the inner lens barrel, and one side of the outer lens barrel has a flange surface;
[0009] An adjustment unit, the adjustment unit includes an adjustment ring and an adjustment member. The adjustment ring is sleeved on the outer periphery of the outer lens barrel and abuts against the flange surface. An adjustment groove is opened on the adjustment ring, and the adjustment groove is located on the circumferential side of the adjustment ring. The adjustment groove has a movement track for the adjustment member to move from the first end of the adjustment ring to the second end of the adjustment ring. A movement groove is opened on the outer lens barrel, and the movement groove is located on the circumferential side of the outer lens barrel. The adjustment member sequentially passes through the adjustment groove and the movement groove and is arranged on the inner lens barrel. The adjustment member is configured to drive the inner lens barrel to move axially relative to the outer lens barrel by moving in the adjustment groove.
[0010] The beneficial effects of the utility model are as follows: Through the setting of the adjustment unit, the process of the axial movement of the inner lens barrel relative to the outer lens barrel can be made more precise, achieving the purpose of improving the resolution; the adjustment groove on the adjustment ring realizes the non-linear adjustment of the inner lens barrel, thereby reducing the volume of the adjustment ring; the movement groove on the outer lens barrel and the adjustment groove on the adjustment ring have an overlapping area axially. When the adjustment ring is sleeved on the outer periphery of the outer lens barrel, it can abut against the flange surface, further reducing the axial dimension of the entire projection lens, and thus better adapting to the miniaturization development trend of the projection lens; in addition, the automatic front-back assembly of single-lens barrel lenses effectively improves the production line efficiency.
[0011] Based on the above technical solutions, the present utility model can also be improved as follows.
[0012] In some alternative embodiments, the moving groove extends along the axial direction of the outer lens barrel.
[0013] In some alternative embodiments, the adjusting member moves along the extending direction of the adjusting groove and is configured to be abutted against the groove wall of the adjusting groove at any position of the adjusting groove so that the inner lens barrel and the outer lens barrel are relatively fixed.
[0014] In some alternative embodiments, a limiting block is provided on the circumferential side of the adjusting ring, a limiting groove is opened on the circumferential side of the outer lens barrel, the moving groove and the limiting groove are arranged in an axial offset on the outer lens barrel, and the limiting block is snapped into the limiting groove and moves within the limiting groove.
[0015] In some alternative embodiments, a notch is opened on the outer lens barrel, and the notch is used for the limiting block to slide into the limiting groove from outside the limiting groove;
[0016] The notch is in a flared shape, and the flared end of the flared shape extends along the direction away from the outer lens barrel.
[0017] In some alternative embodiments, the adjusting groove is spirally arranged along the circumferential direction of the adjusting ring;
[0018] The rotation direction of the adjusting groove is consistent with the rotation direction of the adjusting ring.
[0019] In some alternative embodiments, the adjusting groove has a first adjusting portion, a second adjusting portion and a bending portion that communicate with each other. The first adjusting portion and the second adjusting portion are located on opposite sides of the bending portion and are symmetrically arranged with respect to the bending portion.
[0020] In some alternative embodiments, a sealing layer is further included. The sealing layer is located at the connection gap between the outer lens barrel and the inner lens barrel, and the sealing layer is an annular sealing layer composed of sealing particles in grease.
[0021] In a second aspect, the present utility model also provides a projection lens, including:
[0022] An outer lens barrel and an inner lens barrel, the outer lens barrel is sleeved on the outer periphery of the inner lens barrel;
[0023] An adjusting unit, the adjusting unit is used to adjust the inner lens barrel to move axially relative to the outer lens barrel.
[0024] In a third aspect, the present utility model also provides a projection device, including a light source, a light valve and the above-mentioned projection lens. The light source is used to provide a laser beam to the light valve, and the light valve is used to modulate the laser beam provided by the light source and then emit it to the projection lens.
[0025] The projection lens and projection device provided by the present utility model, the projection device includes a light source, a light valve and the above-mentioned projection lens, the light source is used to provide a laser beam to the light valve, and the light valve is used to modulate the laser beam provided by the light source and then emit it to the projection lens; wherein, the projection lens includes: an inner lens barrel; an outer lens barrel, the outer lens barrel is sleeved on the outer periphery of the inner lens barrel, and one side of the outer lens barrel has a flange surface; an adjusting unit, the adjusting unit includes an adjusting ring and an adjusting member, the adjusting ring is sleeved on the outer periphery of the outer lens barrel and abuts against the flange surface, an adjusting groove is opened on the adjusting ring, the adjusting groove is located on the circumferential side of the adjusting ring, and the adjusting groove has a moving track for the adjusting member to move from the first end of the adjusting ring to the second end of the adjusting ring, a moving groove is opened on the outer lens barrel, the moving groove is located on the circumferential side of the outer lens barrel, the adjusting member sequentially passes through the adjusting groove and the moving groove and is arranged on the inner lens barrel, and the adjusting member is configured to drive the inner lens barrel to move axially relative to the outer lens barrel by moving in the adjusting groove.
[0026] Through the setting of the adjusting unit, the axial movement of the inner lens barrel relative to the outer lens barrel can be made more precise, achieving the purpose of improving the resolution; the adjusting groove on the adjusting ring realizes the non-linear adjustment of the inner lens barrel, thereby reducing the volume of the adjusting ring; the moving groove on the outer lens barrel and the adjusting groove on the adjusting ring have an overlapping area axially. When the adjusting ring is sleeved on the outer periphery of the outer lens barrel, it can abut against the flange surface, further reducing the axial dimension of the entire projection lens, and thus better adapting to the miniaturization development trend of the projection lens; in addition, the automatic front and rear assembly of the single lens barrel lens effectively improves the production line efficiency. Description of the Drawings
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0028] Figure 1 It is a schematic structural diagram of the projection lens provided by the embodiment of the present application;
[0029] Figure 2 It is an exploded view of the projection lens provided by the embodiment of the present application;
[0030] Figure 3 It is a partial structural schematic diagram of the projection lens provided by the embodiment of the present application;
[0031] Figure 4 It is a structural schematic diagram of the inner lens barrel in the projection lens provided by the embodiment of the present application;
[0032] Figure 5Schematic diagram of the structure of the outer lens barrel of the projection lens provided by the embodiment of the present application from the first perspective;
[0033] Figure 6 Schematic diagram of the structure of the inner lens barrel of the projection lens provided by the embodiment of the present application from the second perspective;
[0034] Figure 7 Cross-sectional view of the projection lens provided by the embodiment of the present application from the first perspective;
[0035] Figure 8 Cross-sectional view of the projection lens provided by the embodiment of the present application from the second perspective;
[0036] Figure 9 Schematic diagram of the structure of an adjusting ring in the projection lens provided by the embodiment of the present application;
[0037] Figure 10 Schematic diagram of the structure of another adjusting ring in the projection lens provided by the embodiment of the present application;
[0038] Figure 11 Schematic diagram of the structure of another adjusting ring in the projection lens provided by the embodiment of the present application;
[0039] Figure 12 Cross-sectional view of the inner lens barrel of the projection lens provided by the embodiment of the present application from the third perspective.
[0040] Description of reference numerals:
[0041] 100 - Projection lens;
[0042] 110 - Inner lens barrel;
[0043] 111 - Mounting groove;
[0044] 120 - Outer lens barrel;
[0045] 121 - Flange surface;
[0046] 122 - Moving groove;
[0047] 123 - Limiting groove;
[0048] 124 - Notch;
[0049] 130 - Adjusting unit;
[0050] 131 - Adjusting ring;
[0051] 1311 - Adjusting groove;
[0052] 13111 - First adjusting part;
[0053] 13112 - Second adjusting part;
[0054] 13113 - Bent portion;
[0055] 1312 - Limit block;
[0056] 132 - Adjusting member;
[0057] 140 - Connecting member. Detailed implementation manner
[0058] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model. All other embodiments obtained belong to the scope of protection of the present utility model. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.
[0059] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0060] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0061] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0062] Currently, in order to achieve the goals of miniaturization and low cost, the lenses in laser projection products reduce the number of group adjustments and thus the number of components. For conventional micro-projection lenses, two or more groups are designed for compensation design. However, due to the setting of multiple groups, it is difficult to achieve automated assembly.
[0063] To overcome the defects in the prior art, the projection lens and projection device provided by the present utility model, through the setting of the adjustment unit, make the process of the inner lens barrel moving axially relative to the outer lens barrel more precise, achieving the purpose of improving the resolution; the adjustment groove on the adjustment ring realizes the non-linear adjustment of the inner lens barrel, thereby reducing the volume of the adjustment ring; the moving groove on the outer lens barrel and the adjustment groove on the adjustment ring have an overlapping area axially. When the adjustment ring is sleeved on the outer periphery of the outer lens barrel, it can abut against the flange surface, further reducing the axial dimension of the entire projection lens, and thus better adapting to the miniaturization development trend of the projection lens; in addition, the automated assembly of the front and rear single-lens barrel lenses effectively improves the production line efficiency.
[0064] The content of the present utility model will be described in detail below in conjunction with the drawings, so that those skilled in the art can understand the content of the present utility model more clearly and in detail.
[0065] Figure 1 It is a schematic structural diagram of the projection lens provided by the embodiment of the present application, Figure 2 It is an exploded view of the projection lens provided by the embodiment of the present application, Figure 3 It is a schematic partial structural diagram of the projection lens provided by the embodiment of the present application, Figure 4 It is a schematic structural diagram of the inner lens barrel in the projection lens provided by the embodiment of the present application, Figure 5 It is a schematic structural diagram of the outer lens barrel from the first perspective in the projection lens provided by the embodiment of the present application, Figure 6 It is a schematic structural diagram of the inner lens barrel from the second perspective in the projection lens provided by the embodiment of the present application, Figure 7 It is a cross-sectional view of the projection lens from the first perspective provided by the embodiment of the present application, Figure 8This is a cross-sectional view of the second perspective of the projection lens provided by the embodiment of the present application.
[0066] As Figures 1 to 8 shown, the embodiment of the present application provides a projection lens 100, including:
[0067] An inner lens barrel 110;
[0068] An outer lens barrel 120, the outer lens barrel 120 is sleeved on the outer periphery of the inner lens barrel 110, and one side of the outer lens barrel 120 has a flange surface 121;
[0069] An adjustment unit 130, the adjustment unit 130 includes an adjustment ring 131 and an adjustment member 132, the adjustment ring 131 is sleeved on the outer periphery of the outer lens barrel 120 and abuts against the flange surface 121, an adjustment groove 1311 is formed on the adjustment ring 131, the adjustment groove 1311 is located on the circumferential side of the adjustment ring 131, the adjustment groove 1311 has a movement track for the adjustment member 132 to move from the first end of the adjustment ring 131 to the second end of the adjustment ring 131, a movement groove 122 is formed on the outer lens barrel 120, the movement groove 122 is located on the circumferential side of the outer lens barrel 120, the adjustment member 132 sequentially passes through the adjustment groove 1311 and the movement groove 122 and is arranged on the inner lens barrel 110, and the adjustment member 132 is configured to drive the inner lens barrel 110 to move axially relative to the outer lens barrel 120 by moving in the adjustment groove 1311.
[0070] Through the above settings, that is, through the setting of the adjustment unit 130, the process of the axial movement of the inner lens barrel 110 relative to the outer lens barrel 120 can be made more precise, so as to achieve the purpose of improving the resolution; the adjustment groove 1311 on the adjustment ring 131 realizes the non-linear adjustment of the inner lens barrel 110, thereby reducing the volume of the adjustment ring 131; the movement groove 122 on the outer lens barrel 120 and the adjustment groove 1311 on the adjustment ring 131 have an overlapping area axially. When the adjustment ring 131 is sleeved on the outer periphery of the outer lens barrel 120, it can abut against the flange surface 121, further reducing the axial dimension of the entire projection lens 100, and thus better adapting to the miniaturization development trend of the projection lens 100; in addition, the automatic front and rear assembly of the single-lens barrel lens effectively improves the production line efficiency.
[0071] It should be noted that the following specifically describes each structure.
[0072] It should be noted that the inner lens barrel 110 further includes a lens group. Due to the need of optical design, the lenses in the inner lens barrel 110 are usually divided into multiple groups. For example, the lenses can be divided into a front group and a rear group, or divided into a front group, a middle group and a rear group, etc. Each group usually includes multiple lenses, such as spherical or aspherical lenses.
[0073] The lens group may include a front lens group and a rear lens group. The front lens group is at the head end of the front lens group of the lenses, and the rear lens group is arranged at the tail end of the front lens group of the lenses.
[0074] Specifically, the lenses of the front lens group are successively adsorbed by an automatic assembly device in the assembly order and then assembled and pressed, and finally the pressing ring is locked. After the front lens group is inverted, the rear lens and the spacer ring are assembled in the same way. Finally, after the pressing ring is locked, dispensing is completed.
[0075] The lens group can project an image light beam, and the image light beam can project an image on the projection screen for the user to view.
[0076] A lens is a flexible and transparent material with two surfaces presenting different curvatures, so that it can change the propagation direction or zoom of light when needed as required. Lenses can be used in optical instruments, glasses, photographic lenses, etc. A lens is a common type of lens, and it can focus or disperse light according to its curvature.
[0077] In projection, common lenses include convex lenses and concave lenses. A convex lens can focus parallel light rays to a point, which is called the focal point. A concave lens disperses parallel light rays. By using lenses of appropriate types and curvatures, the light in the projection lens 100 can be adjusted to make the projection image clearly visible.
[0078] It should be noted that one side of the outer lens barrel 120 has a flange surface 121. When the adjusting ring 131 is sleeved on the outer periphery of the outer lens barrel 120, it can abut against the flange surface 121. The outer lens barrel 120 is sleeved on the outer periphery of the inner lens barrel 110, and the whole structure is more compact and more suitable for the current small-sized projection lens 100. Compared with the large-sized setting, the projection lens 100 of the present application occupies less space and has a high space utilization rate.
[0079] It should be noted that one end of the adjusting member 132 can be fixed on the inner lens barrel 110, and the other end successively passes through the adjusting groove 1311 and the moving groove 122 and can move in the adjusting groove 1311 and the moving groove 122.
[0080] Since the adjusting groove 1311 has a moving track for the adjusting member 132 to move from the first end of the adjusting ring 131 to the second end of the adjusting ring 131, during the movement of the adjusting member 132 in the adjusting groove 1311, the inner lens barrel 110 is driven to move.
[0081] Specifically, the endoscope barrel 110 is inserted into the outer endoscope barrel 120. The adjusting ring 131 is sleeved outside the outer endoscope barrel 120. One end of the adjusting member 132 is connected to the endoscope barrel 110, and the other end is slidably engaged with the adjusting groove 1311, and the middle section is slidably engaged with the moving groove 122. That is to say, the adjusting member 132 is slidably engaged with both the moving groove 122 and the adjusting groove 1311. When the adjusting ring 131 is rotated, since the adjusting ring 131 is restricted by the adjusting groove 1311 and the moving groove 122, it can only move axially relative to the outer endoscope barrel 120, thereby driving the endoscope barrel 110 to axially move relative to the outer endoscope barrel 120, realizing the telescopic movement of the endoscope barrel 110 along the outer endoscope barrel 120.
[0082] It should be noted that the moving groove 122 on the outer endoscope barrel 120 and the adjusting groove 1311 on the adjusting ring 131 have an overlapping area axially. Basically, the length of the moving groove 122 is equal to the axial dimension of the adjusting groove 1311. Therefore, it is basically not necessary to additionally increase the axial dimension of the entire focusing lens due to the requirements of limiting and guiding, providing a more flexible space design for the arrangement of other components on the focusing lens, and further reducing the axial dimension of the entire focusing lens.
[0083] In some embodiments, an installation groove 111 is formed on the endoscope barrel 110. The adjusting member 132 sequentially passes through the adjusting groove 1311, the moving groove 122, and the installation groove 111, and is fixed in the installation groove 111 through the connecting member 140 to ensure that the adjusting member 132 is installed on the endoscope barrel 110.
[0084] In some embodiments, the connecting member 140 is a screw.
[0085] In some embodiments, the outer endoscope barrel 120 can be set to a stepped structure, that is, the outer endoscope barrel 120 is a stepped lens barrel, which can be a single-step structure or a multi-step structure. When set to a single-step structure, the adjusting ring 131 is installed on the side close to the flange surface 121, which can minimize the space occupied in the radial direction and is beneficial to the arrangement of other components in the projection lens 100.
[0086] As Figures 1 to 8 shown, in some alternative embodiments, the moving groove 122 extends along the axial direction of the outer endoscope barrel 120.
[0087] It should be noted that the adjustment groove 1311 has a movement trajectory for the adjustment member 132 to move from the first end of the adjustment ring 131 to the second end of the adjustment ring 131. The movement groove 122 extends along the axial direction of the outer lens barrel 120, which means that the movement groove 122 extends along the axial direction of the outer lens barrel 120, and the adjustment groove 1311 extends obliquely relative to the axis of the adjustment ring 131, so that the movement trajectory of the adjustment member 132 in the adjustment groove 1311 is non-linear and linear in the movement groove 122, which better enables the inner lens barrel 110 to move axially relative to the outer lens barrel 120, thereby achieving the purpose of improving the resolution.
[0088] That is to say, the position and trajectory of the movement groove 122 are set for the movement direction and trajectory of the inner lens barrel 110.
[0089] Such as Figures 1 to 8 As shown, in some alternative embodiments, the adjustment member 132 moves along the extending direction of the adjustment groove 1311 and is configured to be abutted against the groove wall of the adjustment groove 1311 at any position of the adjustment groove 1311 to relatively fix the inner lens barrel 110 and the outer lens barrel 120.
[0090] It should be noted that such a design, on the one hand, can ensure that the adjustment member 132 moves along the extending direction of the adjustment groove 1311 to meet the requirement of adjusting the position of the inner lens barrel 110 relative to the outer lens barrel 120; on the other hand, when adjusted to a suitable position, the adjustment member 132 abuts against the groove wall at a certain position of the adjustment groove 1311 to avoid problems such as the inner lens barrel 110 retracting or protruding when the user is writing, so as to fix the position of the inner lens barrel 110 at that place.
[0091] Such as Figures 1 to 8 As shown, in some alternative embodiments, a limiting block 1312 is provided on the circumferential side of the adjustment ring 131, and a limiting groove 123 is opened on the circumferential side of the outer lens barrel 120. The movement groove 122 and the limiting groove 123 are arranged in an offset manner in the axial direction of the outer lens barrel 120. The limiting block 1312 is snapped into the limiting groove 123 and moves in the limiting groove 123.
[0092] It should be noted that the setting of the limiting block 1312 and the limiting groove 123 ensures that the adjustment ring 131 is installed on the outer lens barrel 120, and the limiting block 1312 is snapped into the limiting groove 123, which can prevent the adjustment ring 131 from falling off. Among them, the limiting block 1312 moves in the limiting groove 123, which can match the rotation of the adjustment ring 131 relative to the outer lens barrel 120. That is, by rotating the adjustment ring 131, the adjustment member 132 can move in the adjustment groove 1311 and the movement groove 122, thereby driving the inner lens barrel 110 to move axially relative to the outer lens barrel 120, realizing the telescopic movement of the inner lens barrel 110 along the outer lens barrel 120, and achieving the purpose of improving the resolution.
[0093] In addition, it should be noted that the axially offset arrangement of the moving groove 122 and the limiting groove 123 can reduce the design difficulty caused by the need to avoid interference between the adjusting member 132 and the limiting block 1312, thereby facilitating the machining and assembly of each component.
[0094] With the above-mentioned outer lens barrel 120, only the moving groove 122 and the limiting groove 123 are provided thereon. Only the moving groove 122 extends along the axial direction of the outer lens barrel 120, and the limiting groove 123 surrounds circumferentially. Compared with the adjusting groove 1311, it occupies less space axially. Therefore, the overall length of the outer lens barrel 120 can be set smaller. When it is installed on the focusing lens, it is beneficial to the arrangement of other components and also beneficial to adapting to the miniaturization development trend of the projection lens 100.
[0095] Specifically, the inner lens barrel 110 is inserted into the outer lens barrel 120, the adjusting ring 131 is sleeved outside the outer lens barrel 120, and the limiting block 1312 is in sliding fit with the limiting groove 123; one end of the adjusting member 132 is connected to the inner lens barrel 110, the other end is in sliding fit with the adjusting groove 1311, and the middle section is in sliding fit with the moving groove 122. That is to say, the adjusting member 132 is in sliding fit with both the moving groove 122 and the adjusting groove 1311. When the adjusting ring 131 is rotated, due to the constraint between the limiting block 1312 and the limiting groove 123, the adjusting ring 131 can only rotate around the outer lens barrel 120, and the adjusting member 132 is restricted by both the adjusting groove 1311 and the moving groove 122. Therefore, it can only move axially relative to the outer lens barrel 120, thereby driving the inner lens barrel 110 to move axially relative to the outer lens barrel 120, realizing the telescopic movement of the inner lens barrel 110 along the outer lens barrel 120.
[0096] In some embodiments, the cross-section of the limiting block 1312 is a rectangular structure, or it can also be a circular or arc-shaped structure.
[0097] In some other embodiments, the cross-section of the limiting block 1312 can be trapezoidal. Specifically, the limiting block 1312 has a moving surface and an installation surface. The installation surface is installed on the inner wall surface of the adjusting ring 131, the moving surface is in contact with the limiting groove 123 and moves in the limiting groove 123. Among them, the area of the moving surface is smaller than the area of the installation surface, reducing the contact with the limiting groove 123.
[0098] In some other embodiments, the cross-section of the limiting block 1312 can be triangular.
[0099] As Figures 1 to 8 shown, in some optional embodiments, a notch 124 is opened on the outer lens barrel 120. The notch 124 is used for the limiting block 1312 to slide into the limiting groove 123 from outside the limiting groove 123;
[0100] The notch 124 is trumpet-shaped, and the flared end of the trumpet shape extends along the direction away from the outer lens barrel 120.
[0101] It should be noted that the notch 124 is provided to facilitate the smoother sliding of the limiting block 1312 from outside the limiting groove 123 into the limiting groove 123, and facilitate the installation of the adjusting ring 131 on the outer lens barrel 120.
[0102] In addition, the notch 124 is in a flared shape. Compared with a horizontal shape, the notch 124 is more convenient for the adjusting ring 131 to be screwed into the limiting groove 123.
[0103] In some embodiments, the size of the notch 124 can be adjusted according to the size of the adjusting ring 131, and no further limitation is imposed here.
[0104] It should be noted that the limiting groove 123 is located in the area of the outer lens barrel 120 close to the flange surface 121; a notch 124 for the limiting block 1312 to slide into the limiting groove 123 is further provided on the outer wall of the outer lens barrel 120. The notch 124 extends along the axial direction of the outer lens barrel 120 and penetrates the end face of the outer lens barrel 120 on the light-emitting side and the limiting groove 123, that is, the limiting groove 123 has a discontinuous opening in the circumferential direction.
[0105] When the adjusting ring 131 is installed on the outer lens barrel 120, the limiting block 1312 can slide into the limiting groove 123 from the notch 124 to facilitate installation.
[0106] Of course, the size of the limiting block 1312 in the circumferential direction is less than or equal to the size of the notch 124.
[0107] In some alternative embodiments, there is at least one notch 124. The at least one notch 124 divides the limiting groove 123 into multiple limiting groove segments. The limiting groove segments have side wall surfaces, and a notch 124 is formed between the side wall surfaces of two adjacent limiting groove segments and the outer wall surface of the outer lens barrel 120.
[0108] Optionally, a plurality of notches 124 are provided along the circumferential direction of the outer lens barrel 120, and the notches 124 are evenly distributed along the circumferential direction of the outer lens barrel 120. In this embodiment, a plurality of limiting blocks 1312 can also be provided, and the plurality of limiting blocks 1312 and the plurality of notches 124 correspond one by one. That is to say, there are multiple groups of notches 124 and limiting blocks 1312 distributed along the circumferential direction of the outer lens barrel 120 to further increase the rotational stability of the adjusting ring 131.
[0109] Figure 9 This is a schematic structural diagram of an adjusting ring in a projection lens provided by an embodiment of the present application. As Figures 1 to 9 shown, in some alternative embodiments, the adjusting groove 1311 is spirally arranged along the circumferential direction of the adjusting ring 131;
[0110] The rotation direction of the adjusting groove 1311 is the same as the rotation direction of the adjusting ring 131.
[0111] It should be noted that the adjustment groove 1311 is an arc-shaped groove. The circumferential spiral setting makes the movement track of the adjusting member 132 match the rotation track of the adjusting ring 131. And compared with the movement groove 122 extending along the axial direction of the outer lens barrel 120, such a track design of the adjustment groove 1311 can better match the movement distance of the adjusting ring 131.
[0112] It should be noted that such a design ensures that when the user rotates the adjusting ring 131, the movement of the adjusting member 132 on the adjustment groove 1311 can be consistent with the rotation direction of the adjusting ring 131, so as to improve the stability of the structure.
[0113] In addition, it should be noted that specifically, the rotation direction of the adjustment groove 1311 can be adjusted accordingly according to the actual situation, and the embodiments of the present application do not limit it too much here.
[0114] Figure 10 It is a schematic structural diagram of another adjusting ring in the projection lens provided by the embodiment of the present application. Figure 11 It is a schematic structural diagram of another adjusting ring of the projection lens provided by the embodiment of the present application.
[0115] As Figures 1 to 8 、 Figure 10 and Figure 11 shown, in some alternative embodiments, the adjustment groove 1311 has a first adjustment portion 13111, a second adjustment portion 13112 and a bending portion 13113 that are interconnected. The first adjustment portion 13111 and the second adjustment portion 13112 are located on opposite sides of the bending portion 13113 and are symmetrically arranged relative to the bending portion 13113.
[0116] It should be noted that the first adjustment portion 13111 and the second adjustment portion 13112 are arc-shaped structures, and there is a bending portion 13113 between them. The setting of the bending portion 13113 makes the transition between the first adjustment portion 13111 and the second adjustment portion 13112 smoother, and further makes the movement mode of the adjusting member 132 smoother; in addition, the movement amount of the adjusting member 132 in the adjustment groove 1311 matches the movement amount of the inner lens barrel 110 relative to the outer lens barrel 120, making the movement amount of the inner lens barrel 110 relative to the outer lens barrel 120 more accurate and achieving the purpose of improving the resolution.
[0117] As Figure 10 and Figure 11 shown, in some embodiments, the shape of the adjustment groove 1311 can be S-shaped or C-shaped.
[0118] Figure 12 It is a cross-sectional view of the third perspective of the inner lens barrel in the projection lens provided by the embodiment of the present application, as Figure 12As shown, in some alternative embodiments, a sealing layer is further included. The sealing layer is located at the connection gap between the outer lens barrel 120 and the inner lens barrel 110, and the sealing layer is an annular sealing layer composed of sealing particles in the grease.
[0119] It should be noted that, Figure 12 a sealing layer is provided at positions A and B.
[0120] It should be noted that grease is a substance used to reduce friction and wear and prevent parts from corrosion.
[0121] Grease is usually a viscous substance formed by mixing a base oil and a thickener, and can work under various temperature and pressure conditions.
[0122] It should be noted that grease with sealing particles is injected into the connection gap between the outer lens barrel 120 and the inner lens barrel 110, so that the sealing particles in the grease enter the connection gap between the outer lens barrel 120 and the inner lens barrel 110. During the installation process of the outer lens barrel 120 and the inner lens barrel 110, while playing a lubricating role, an annular sealing layer can also be formed in the gap.
[0123] In some embodiments, when assembling the outer lens barrel 120 and the inner lens barrel 110, rotate them appropriately to form a sufficient oil film on the contact surface, and then lock the adjusting ring 131 and the adjusting member 132, thus achieving the sealing effect, and the solution has been verified to be effective through a large number of dust experiments.
[0124] In some embodiments, the sealing particles of this embodiment can be polytetrafluoroethylene particles, and the grease doped with the sealing particles can be grease.
[0125] The projection lens provided by the embodiment of the present application includes: an inner lens barrel; an outer lens barrel sleeved on the outer periphery of the inner lens barrel, and one side of the outer lens barrel has a flange surface; an adjusting unit including an adjusting ring and an adjusting member. The adjusting ring is sleeved on the outer periphery of the outer lens barrel and abuts against the flange surface. An adjusting groove is opened on the adjusting ring, and the adjusting groove is located on the circumferential side of the adjusting ring. The adjusting groove has a movement track for the adjusting member to move from the first end of the adjusting ring to the second end of the adjusting ring. A movement groove is opened on the outer lens barrel, and the movement groove is located on the circumferential side of the outer lens barrel. The adjusting member sequentially passes through the adjusting groove and the movement groove and is arranged on the inner lens barrel. The adjusting member is configured to drive the inner lens barrel to move axially relative to the outer lens barrel by moving in the adjusting groove.
[0126] By adjusting the settings of the adjustment unit, the process of the endoscopic barrel moving axially relative to the outer endoscopic barrel can be made more precise, achieving the purpose of improving the resolution; the adjustment slots on the adjustment ring enable non-linear adjustment of the endoscopic barrel, thereby reducing the volume of the adjustment ring; the moving slots on the outer endoscopic barrel and the adjustment slots on the adjustment ring have an overlapping area axially. When the adjustment ring is sleeved on the outer periphery of the outer endoscopic barrel, it can abut against the flange surface, further reducing the axial dimension of the entire projection lens, and thus better adapting to the miniaturization development trend of the projection lens; in addition, the automatic front-back assembly of the single-barrel lens effectively improves the production line efficiency.
[0127] In addition, as Figures 1 to 12 shown, the embodiment of the present application also provides a projection lens 100, including:
[0128] An outer endoscopic barrel 120 and an inner endoscopic barrel 110, the outer endoscopic barrel 120 is sleeved on the outer periphery of the inner endoscopic barrel 110;
[0129] An adjustment unit 130, the adjustment unit 130 is used to adjust the inner endoscopic barrel 110 to move axially relative to the outer endoscopic barrel 120 along the outer endoscopic barrel 120.
[0130] For the projection lens provided by the embodiment of the present application, by adjusting the settings of the adjustment unit, the process of the inner endoscopic barrel moving axially relative to the outer endoscopic barrel can be made more precise, achieving the purpose of improving the resolution; the adjustment slots on the adjustment ring enable non-linear adjustment of the inner endoscopic barrel, thereby reducing the volume of the adjustment ring; the moving slots on the outer endoscopic barrel and the adjustment slots on the adjustment ring have an overlapping area axially. When the adjustment ring is sleeved on the outer periphery of the outer endoscopic barrel, it can abut against the flange surface, further reducing the axial dimension of the entire projection lens, and thus better adapting to the miniaturization development trend of the projection lens; in addition, the automatic front-back assembly of the single-barrel lens effectively improves the production line efficiency.
[0131] In addition, the embodiment of the present application also provides a projection device, including a light source, a light valve, and the above-mentioned projection lens 100. The light source is used to provide a laser beam to the light valve, and the light valve is used to modulate the laser beam provided by the light source and then emit it to the projection lens 100.
[0132] It should be noted that the light source can be generated by a laser, and the laser can be a three-color laser. Among them, the laser can emit red laser, blue laser, and green laser. Of course, the laser can be a single-color laser.
[0133] Exemplarily, the light valve can be a digital micromirror chip (Digital Micromirror Device, DMD).
[0134] In order to focus, zoom, etc. the emitted light so that a normal display picture image is projected on the projection screen, the projection device further includes a projection lens 100. The projection lens 100 contains multiple groups of lenses, and each group of lenses includes one or more lenses. In this way, through the refraction between different lenses, the emitted light can be focused on the projection screen, so as to display a normal picture. In order to fix the lenses, the projection lens 100 further includes at least two lens barrels, so that multiple lenses can be fixed in each lens barrel at a preset interval to achieve imaging through the refraction of the lenses on the light.
[0135] In some embodiments, the overall shape of the projection lens 100 can be approximately rectangular parallelepiped-shaped.
[0136] Among them, the specific structure, working principle and function of the projection lens 100 have been described in detail in the foregoing Embodiment 1, and will not be elaborated here.
[0137] Specifically, in the projection device of this embodiment, the projection device can be various existing projectors, such as laser projectors, etc. The projection lens 100 can project a projection picture onto the display film of the projection screen, so that the display film can display the projection picture for people to watch.
[0138] Through the setting of the adjustment unit, the process of the inner lens barrel moving axially relative to the outer lens barrel can be made more precise, so as to achieve the purpose of improving the resolution; the adjustment groove on the adjustment ring realizes the non-linear adjustment of the inner lens barrel, thereby reducing the volume of the adjustment ring; the moving groove on the outer lens barrel and the adjustment groove on the adjustment ring have an overlapping area axially. When the adjustment ring is sleeved on the outer periphery of the outer lens barrel, it can abut against the flange surface, further reducing the axial dimension of the entire projection lens, and thus better adapting to the miniaturization development trend of the projection lens; in addition, the automatic front and rear assembly of the single lens barrel lens effectively improves the production line efficiency.
[0139] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0140] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0141] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A projection lens, characterized in that: include: Endoscope barrel; An outer lens barrel, which is sleeved on the outer circumference of the inner lens barrel, and one side of the outer lens barrel has a flange surface; An adjusting unit, the adjusting unit comprises an adjusting ring and an adjusting member, the adjusting ring is sleeved on the outer circumference of the outer barrel and abuts against the flange surface, the adjusting ring is provided with an adjusting groove, the adjusting groove is located on the circumference of the adjusting ring, the adjusting groove has a moving track for the adjusting member to move from the first end of the adjusting ring to the second end of the adjusting ring, the outer barrel is provided with a moving groove, the moving groove is located on the circumference of the outer barrel, the adjusting member passes through the adjusting groove and the moving groove in sequence, and is provided on the inner barrel, the adjusting member is configured to drive the inner barrel to move relative to the outer barrel along the axial direction of the outer barrel by moving in the adjusting groove.
2. The projection lens according to claim 1, characterized in that: The moving groove extends along the axial direction of the outer barrel.
3. The projection lens according to claim 2, characterized in that: The adjusting member moves along the extending direction of the adjusting groove, and is configured to abut against the groove wall of the adjusting groove at any position of the adjusting groove, so that the inner lens barrel and the outer lens barrel are relatively fixed.
4. The projection lens according to any one of claims 1 to 3, characterized in that: A limit block is provided on the circumferential side of the adjustment ring, a limit groove is provided on the circumferential side of the outer lens barrel, the movable groove and the limit groove are staggered in the axial direction of the outer lens barrel, the limit block is inserted into the limit groove, and moves in the limit groove.
5. The projection lens according to claim 4, characterized in that: A notch is provided on the outer lens barrel, and the notch is used for the limiting block to slide from outside the limiting groove into the limiting groove; The notch is trumpet-shaped, and the expanded end of the trumpet shape extends in a direction away from the outer lens barrel.
6. The projection lens according to any one of claims 1 to 3, characterized in that: The adjusting groove is arranged along the circumferential spiral of the adjusting ring; The rotation direction of the adjusting groove is consistent with the rotation direction of the adjusting ring.
7. The projection lens according to any one of claims 1 to 3, characterized in that: The adjusting groove comprises a first adjusting portion, a second adjusting portion and a bending portion which are interconnected. The first adjusting portion and the second adjusting portion are located at opposite sides of the bending portion and are symmetrically arranged relative to the bending portion.
8. The projection lens according to any one of claims 1 to 3, characterized in that: It also includes a sealing layer, which is located at the connection gap between the outer lens barrel and the inner lens barrel, and is an annular sealing layer composed of sealing particles in the grease.
9. A projection lens, characterized in that: include: An outer lens barrel and an inner lens barrel, wherein the outer lens barrel is sleeved on the outer circumference of the inner lens barrel; An adjusting unit, the adjusting unit comprises an adjusting ring and an adjusting member, the adjusting ring is sleeved on the outer circumference of the outer lens barrel, the adjusting ring is provided with an adjusting groove, the adjusting groove is located on the circumference of the adjusting ring, the outer lens barrel is provided with a moving groove, the moving groove is located on the circumference of the outer lens barrel, the adjusting member passes through the adjusting groove and the moving groove in sequence, and is arranged on the inner lens barrel, the adjusting member is configured to drive the inner lens barrel to move relative to the outer lens barrel along the axial direction of the outer lens barrel by moving in the adjusting groove.
10. A projection device, characterized in that: It comprises a light source, a light valve and the projection lens according to any one of claims 1 to 9, wherein the light source is used to provide a laser beam to the light valve, and the light valve is used to modulate the laser beam provided by the light source and then emit it to the projection lens.