Lens barrel and lens

Abstract

The present invention relates to a lens barrel and a lens, comprising a main body (11) and an annular aperture (12) arranged at the object side end of the main body (11); the annular aperture (12) freely extends toward the object side and forms a truncated cone-shaped cylinder with one end gradually becoming smaller; a front aperture (13) extending radially is arranged on the inner surface of the annular aperture (12) near the object side end; the length L1 of the annular aperture (12) extending toward the object side satisfies: L1 ≥ 0.2 mm. The lens barrel is provided with an annular aperture at the object side end, so that the size of the lens head using the lens barrel is not limited by the diameter of the lens structure, but is only affected by the effective diameter of the system and the wall thickness of the straight-wall aperture, thereby realizing the ultimate design of the head size. Moreover, after the integrated lens barrel process is achieved, the feasibility and mass production of the lens molding and lens assembly processes of the special optical system design are realized.

Description

Technical Field

[0001] The present invention relates to the field of optics, and in particular to a lens barrel and a lens. Background Art

[0002] The main structure of the lens of the existing mobile phone imaging device on the market is a barrel structure with a radial aperture. With the development of the mobile phone market and in order to provide users with a better screen display experience, the requirements for the screen-to-body ratio of mobile phones are getting higher and higher. In turn, the requirements for the head structure design of mobile phone lenses are also getting higher and higher. The original lens structure design has reached a certain bottleneck. In order to meet the requirements of higher screen-to-body ratio of electronic devices, it is necessary to further reduce the size of the lens head. Summary of the Invention

[0003] The object of the present invention is to provide a lens barrel and a lens, which can solve the problem that the lens head has a large size.

[0004] To achieve the above-mentioned object of the invention, the present invention provides a lens barrel, comprising a main body, and an annular aperture arranged at the object side end of the main body;

[0005] The annular aperture freely extends toward the object side and forms a truncated cone-shaped cylinder with one end gradually becoming smaller;

[0006] A front end aperture extending in the radial direction is provided on the inner surface of the annular aperture close to the object side end;

[0007] The length L1 of the annular aperture extending toward the object side satisfies: L1 ≥ 0.2 mm.

[0008] According to one aspect of the present invention, the thickness of the side wall of the annular aperture is uniform, or the thickness of the side wall of the annular aperture gradually becomes thinner along the direction in which the annular aperture extends toward the object side.

[0009] According to one aspect of the present invention, the wall thickness L2 of the annular aperture at the thinnest position of the annular aperture side wall satisfies: L2≤0.3mm.

[0010] According to one aspect of the present invention, the inclination angle α of the outer side surface of the annular aperture satisfies: α≤30°.

[0011] According to one aspect of the present invention, the inner surface of the annular aperture is a combination of one or more of a cylindrical surface, an annular conical surface, and an annular arc surface.

[0012] According to one aspect of the present invention, the annular aperture is made of injection molding material or metal material;

[0013] The main body is made of injection molding material or metal material.

[0014] According to one aspect of the present invention, the radius R of the end of the annular diaphragm connected to the main body satisfies: 0.85 mm ≤ R ≤ 0.95 mm.

[0015] According to one aspect of the present invention, the wall thickness L3 of the end of the main body connecting the annular diaphragm satisfies: 0.13 mm ≤ L3 ≤ 0.24 mm.

[0016] According to one aspect of the present invention, the end face of the front diaphragm close to the object side includes a first end face portion and a second end face portion connected to each other;

[0017] The first end face portion and the second end face portion are respectively inclined surfaces inclined in the direction close to the image side, and the inclination angle of the first end face portion is greater than the inclination angle of the second end face portion.

[0018] According to one aspect of the present invention, the inclination angle γ of the first end face portion satisfies: γ ≥ FOV / 2, and the inclination angle β of the second end face portion satisfies: β < FOV / 2, where FOV represents the field of view angle.

[0019] To achieve the above object of the invention, the present invention provides a lens, which is characterized by including a lens barrel and a lens group disposed in the lens barrel;

[0020] The supporting portion of the first lens of the lens group close to the object side is supported in the main body in a shape matching with the main body of the lens barrel, and the object side of the optically effective portion of the first lens extends into the annular diaphragm of the lens barrel;

[0021] [[ID=2I]]A gap is left between the annular diaphragm and the optically effective portion.

[0022] According to one aspect of the present invention, the thickness CT of the optically effective portion satisfies: CT > L1 ≥ 0.2 mm, where L1 represents the length of the annular diaphragm extending towards the object side.

[0023] According to one aspect of the present invention, the depth reduction amount of the VP point of the optical system of the lens from the object side end of the lens is: H(1 - tan(β) / tan(FOV / 2)), where the VP point refers to the virtual intersection point of the FOV optics with the optical axis in the lens, FOV represents the field of view angle, β represents the inclination angle of the second end face portion of the end face of the front diaphragm close to the object side, and H represents the width of the second end face portion along the optical axis direction.

[0024] According to one embodiment of the present invention, a lens barrel with an annular aperture at the object-side end allows the size of the lens head using this barrel to be controlled not by the diameter of the lens structure, but only by the effective diameter of the system and the thickness of the straight-walled aperture, achieving a maximum head size design. Furthermore, the achievement of a one-piece lens barrel process makes this unique optical system design feasible and mass-producible in terms of lens molding and assembly processes.

[0025] According to one solution of the present invention, the thickness of the side wall of the annular diaphragm is uniform. By setting the annular diaphragm to have a uniform thickness, the strength of the annular diaphragm is consistent at all positions, the annular diaphragm is easy to process and shape, and the quality is easy to ensure.

[0026] According to one embodiment of the present invention, the thickness of the sidewall of the annular aperture gradually decreases as it extends toward the object side. By providing the annular aperture with varying thicknesses, the diameter of the annular aperture front end is further reduced, while maintaining the structural strength of the annular aperture. This allows the front end of the lens barrel to be even smaller, thereby increasing the screen-to-body ratio of electronic devices employing the lens barrel of the present invention.

[0027] According to one solution of the present invention, the thickness of the side wall of the annular diaphragm is uniform, and the annular diaphragm is set within the above-mentioned thickness range, which ensures the strength of the annular diaphragm, is beneficial to ensuring the overall structural strength of the lens barrel, and provides good protection for the lenses installed in the lens barrel.

[0028] According to one solution of the present invention, when the thickness of the side wall of the annular aperture gradually becomes thinner along the direction of the annular aperture extending toward the object side, the thinnest position of the annular aperture is set within the above-mentioned range, ensuring that the annular aperture has sufficient structural strength at the thinnest position, which is beneficial to ensuring the installation strength of the entire lens barrel.

[0029] According to one solution of the present invention, the object side end of the annular aperture is set within the above range, which ensures the light transmittance of the lens barrel using the lens barrel and also makes the screen-to-body ratio of the electronic device using the lens barrel of the present invention higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram showing a lens structure according to an embodiment of the present invention;

[0031] Figure 2 A partial structural diagram schematically showing a lens barrel according to an embodiment of the present invention;

[0032] Figure 3 The figure schematically shows the assembly structure of the lens and the screen according to one embodiment of the present invention. DETAILED DESCRIPTION

[0033] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0034] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0036] like Figure 1 According to one embodiment of the present invention, a lens barrel is characterized by comprising a main body 11 and an annular aperture 12 disposed at the object-side end of the main body 11. In this embodiment, the annular aperture 12 extends freely toward the object side and forms a truncated conical cylindrical body with one end gradually tapering. In this embodiment, a radially extending front aperture 13 is disposed on the inner surface of the annular aperture 12 near the object-side end. In this embodiment, the length L1 of the annular aperture 12 extending toward the object side satisfies the following conditions: L1 ≥ 0.2 mm.

[0037] like Figure 1 As shown, according to one embodiment of the present invention, the thickness of the side wall of the annular aperture 12 is uniform and equal. By setting the annular aperture 12 to a uniform and equal thickness, the strength of the annular aperture 12 at all positions is consistent, the annular aperture 12 is easy to process and form, and the quality is easy to ensure. According to another embodiment of the present invention, the thickness of the side wall of the annular aperture 12 gradually becomes thinner along the direction in which the annular aperture 12 extends toward the object side. By setting the annular aperture 12 to unequal thickness, while ensuring the structural strength of the annular aperture 12, it is further beneficial to reduce the diameter of the front end of the annular aperture 12, making the front end of the lens barrel smaller, and making the screen-to-body ratio of the electronic device using the lens barrel of the present invention higher.

[0038] like Figure 1As shown, according to one embodiment of the present invention, the wall thickness L2 of the annular diaphragm 12 at the thinnest position of the side wall of the annular diaphragm 12 satisfies: L2 ≤ 0.3 mm. In this embodiment, the thickness of the side wall of the annular diaphragm 12 is uniform and equal, and the annular diaphragm 12 is set within the above-mentioned thickness range, thereby ensuring the strength of the annular diaphragm 12, which is beneficial to ensuring the structural strength of the entire lens barrel and providing good protection for the lenses installed in the lens barrel. According to another embodiment of the present invention, when the thickness of the side wall of the annular diaphragm 12 gradually becomes thinner along the direction in which the annular diaphragm 12 extends toward the object side, the thinnest position of the annular diaphragm 12 is set within the above-mentioned range, thereby ensuring that the annular diaphragm has sufficient structural strength at the thinnest position, which is beneficial to ensuring the installation strength of the entire lens barrel.

[0039] like Figure 1 As shown, according to one embodiment of the present invention, the inclination angle α of the outer surface of the annular aperture 12 satisfies: α≤30°. By setting the inclination angle of the annular aperture 12 within the above range, the object-side end of the annular aperture 12 is further reduced, thereby increasing the screen-to-body ratio of electronic devices using the lens barrel of the present invention.

[0040] like Figure 1 As shown, according to one embodiment of the present invention, the inner side surface of the annular diaphragm 12 is a combination of one or more of a cylindrical surface, an annular conical surface, and an annular arc surface. Through the above configuration, the annular diaphragm 12 can be adapted to different lens installations, making the application range of the present invention wider.

[0041] like Figure 1 As shown, according to one embodiment of the present invention, the annular aperture 12 is made of injection molding material or metal, and the main body 11 is also made of injection molding material or metal. The materials used for the annular aperture 12 and the main body 11 can be the same or different. In this embodiment, the injection molding material is preferably a material with low reflectivity or a matte finish. If a metal material is used, it needs to be black-plated.

[0042] like Figure 1 As shown, according to one embodiment of the present invention, the radius R of the end of the annular aperture 12 connected to the main body 11 satisfies the following conditions: 0.85mm≤R≤0.95mm. With this arrangement, the radius of the end with the larger radial dimension of the annular aperture 12 is set within the above range. While ensuring the light transmittance of the lens barrel, the electronic device using the lens barrel of the present invention also has a higher screen-to-body ratio.

[0043] like Figure 1As shown, according to an embodiment of the present invention, the wall thickness L3 of the end of the main body 11 connected to the annular diaphragm 12 satisfies: 0.13 mm ≤ L3 ≤ 0.24 mm. Through the above setting, the wall thickness of the end of the main body 11 connected to the annular diaphragm 12 is set within the above range, ensuring its structural strength and further playing a good supporting role for the annular diaphragm 12, making the installation strength of the lens barrel of the present invention higher.

[0044] Combined with Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, the end face of the front diaphragm 13 close to the object side includes a first end face portion 131 and a second end face portion 132 connected to each other. In this embodiment, the front diaphragm 13 is an annular protrusion provided on the inner side surface of the annular diaphragm 12, and its end face close to the object side is an annular surface. In this embodiment, along the radial direction, the first end face portion 131 and the second end face portion 132 are connected to each other in sequence, and the first end face portion 131 and the second end face portion 132 are respectively inclined surfaces inclined towards the image side direction, and the inclination angle of the first end face portion 131 (i.e., the inclination angle with the optical axis) is greater than the inclination angle of the second end face portion 132 (i.e., the inclination angle with the optical axis). In this embodiment, the inclination angle γ of the first end face portion 131 satisfies: γ ≥ FOV / 2, and the inclination angle β of the second end face portion 132 satisfies: β < FOV / 2, where FOV represents the field of view angle. Through the above setting, the object side surface of the front diaphragm 13 is set as inclined surfaces with multiple different inclination angles. In this way, when the screen thickness of the electronic device adopting the present invention and the FOV of the optical system are certain, it is possible to achieve an ultra-small design of the depth of the VP point (vision position: the virtual intersection point of the fov optics with the optical axis in the lens) of the optical system and the end face of the object side of the lens, and further achieve an ultra-small design of the lens head, so that the ultra-small head lens and the screen opening design cooperate to achieve a high screen-to-body ratio of the electronic device.

[0045] As Figure 1As shown, according to one embodiment of the present invention, a lens assembly includes a lens barrel 1 and a lens group 2 disposed within the lens barrel 1. In this embodiment, the support portion 211 of the first lens 21 of the lens group 2, located near the object side, matches the shape of the main body 11 of the lens barrel 1 and is supported within the main body 11. In this embodiment, the first lens 21 is limited axially and radially by the main body 11, allowing the first lens 21 to be stably installed within the lens barrel 1. In this embodiment, the object side of the optically effective portion 212 of the first lens 21 extends into the annular aperture 12 of the lens barrel 1. In this embodiment, a gap is left between the annular aperture 12 and the optically effective portion 212. This arrangement effectively prevents interference from the annular aperture 12 during lens installation, ensuring that the object-side end of the lens can be smoothly installed within the annular aperture 12. In this embodiment, a gap is also left between the front aperture 13 provided on the inner side of the annular aperture 12 and the optically effective portion 212. This prevents the front aperture 13 from contacting the optically effective portion 212 and serves to block light.

[0046] like Figure 1 As shown, according to one embodiment of the present invention, the thickness CT of the optically effective portion 212 satisfies: CT>L1≥0.2 mm, where L1 represents the length of the annular aperture 12 extending toward the object side.

[0047] According to one embodiment of the present invention, an annular groove for mounting a sealing ring is provided on the inner surface of the annular aperture 12. A soft annular sealing ring is mounted in the annular groove. When the second lens 21 is installed, the annular sealing ring contacts the outer surface of the optically effective portion 212, providing a good seal and effectively eliminating the effects of external dust on the interior of the lens, thereby ensuring the cleanliness of the lens interior.

[0048] See also Figure 3As shown, according to one embodiment of the present invention, the depth reduction between the VP point of the optical system of the lens and the object side end surface of the lens is: H(1-tan(β) / tan(FOV / 2)), where the VP point refers to the virtual intersection point of the FOV optical system with the optical axis in the lens, FOV represents the field of view angle, β represents the inclination angle of the second end surface portion 132 in the end surface of the front aperture 13 close to the object side, and H represents the width of the second end surface portion 132 along the optical axis. Through the above configuration, the object side surface of the front aperture 13 is configured as a plurality of inclined surfaces with different inclination angles. In this way, when the screen thickness and the FOV of the optical system of the electronic device using the present invention are constant, the depth between the VP point (vision position: referring to the virtual intersection point of the FOV optical system with the optical axis in the lens) of the optical system and the object side end surface of the lens can be ultra-small, thereby achieving an ultra-small design of the lens head, so that the ultra-small head lens is matched with the screen opening design to achieve an ultra-high screen-to-body ratio of the electronic device.

[0049] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail, it should be understood that they can be implemented by adopting general devices and methods available in the art.

[0050] The above description is merely one embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lens barrel, characterized in that: It includes a main body (11) and an annular diaphragm (12) provided at the object side end of the main body (11); The annular diaphragm (12) extends freely towards the object side and forms a frustum-shaped cylinder with one end gradually becoming smaller; A front diaphragm (13) extending radially is provided on the inner surface of the annular diaphragm (12) near the object side end; The length L1 of the annular diaphragm (12) extending towards the object side satisfies: L1 ≥ 0.2 mm; The wall thickness L2 at the thinnest position of the side wall of the annular diaphragm (12) satisfies: L2 ≤ 0.3 mm; The inclination angle α of the outer side surface of the annular diaphragm (12) satisfies: α ≤ 30°; The end face of the front diaphragm (13) near the object side includes a first end face part (131) and a second end face part (132) connected to each other; The first end face part (131) and the second end face part (132) are respectively inclined surfaces inclined towards the image side, and the inclination angle of the first end face part (131) is greater than the inclination angle of the second end face part (132); The inclination angle γ of the first end face part (131) satisfies: γ ≥ FOV / 2, and the inclination angle β of the second end face part (132) satisfies: β < FOV / 2, where FOV represents the field of view angle; The depth reduction amount between the VP point of the optical system of the lens assembled based on the lens barrel and the object side end of the lens is: H(1 - tan(β) / tan(FOV / 2)), where the VP point refers to the virtual intersection point of the FOV optics with the optical axis in the lens, FOV represents the field of view angle, β represents the inclination angle of the second end face part (l32) of the end face of the front diaphragm (13) near the object side, and H represents the width of the second end face part (132) along the optical axis direction; The wall thickness L3 of the end of the main body (11) connecting the annular diaphragm (12) satisfies: 0.13 mm ≤ L3 ≤ 0.24 mm; In the lens assembled based on the lens barrel, the thickness CT of the optically effective part (212) of the first lens (21) near the object side satisfies: CT > L1 ≥ 0.2 mm, where L1 represents the length of the annular diaphragm (12) extending towards the object side.

2. The lens barrel according to claim 1, wherein: The thickness of the side wall of the annular diaphragm (12) is uniformly equal, or, along the direction of the annular diaphragm (12) extending towards the object side, the thickness of the side wall of the annular diaphragm (12) gradually becomes thinner.

3. The lens barrel according to claim 2, wherein: The inner side surface of the annular diaphragm (12) is one or a combination of a cylindrical surface, an annular conical surface, and an annular arc surface; 4. The lens barrel according to claim 3, wherein: The annular diaphragm (12) is made of an injection molding material or a metal material; The main body (11) is made of an injection molding material or a metal material.

5. The lens barrel according to claim 4, wherein: The radius R of the end of the annular diaphragm (12) connected to the main body (11) satisfies: 0.85 mm ≤ R ≤ 0.95 mm; 6. A lens using the lens barrel according to any one of claims 1 to 5, characterized in that: It includes a lens barrel (1) and a lens group (2) provided in the lens barrel (1); The supporting portion (211) of the first lens (21) of the lens group (2) close to the object side is supported in the main body (11) of the lens barrel (1) in a manner matching the shape of the main body (11), and the object side of the optically effective portion (212) of the first lens (21) extends into the annular aperture (12) of the lens barrel (1); A gap is left between the annular aperture (12) and the optically effective portion (212).

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