JP6329603B2 - Lens module - Google Patents

Description

  The present invention relates to a lens module.

  As science and technology continue to evolve, electronic devices are constantly evolving to become smarter. In addition to the digital camera, a lens module is also disposed in a portable electronic device such as a tablet PC or a mobile phone. In order to satisfy people's usage needs, there is a higher demand for image quality of objects photographed by the lens module. The image quality of the photographed object is greatly related to the coaxiality of the optical axis of each lens in the lens module.

  The lens module in the related art includes a lens barrel having a light transmission hole and a lens group provided in the lens barrel, and the lens group includes at least two optical lenses. The straight line passing through the geometric center of the light transmission hole and the optical axis of these optical lenses must overlap. In other words, it is necessary to ensure that a high degree of coaxiality is provided. In addition, the connection between each optical lens must also have high stability. However, since the eccentricity between the optical lenses is relatively sensitive during production and manufacture, it is relatively difficult to ensure high coaxiality and stability.

  Therefore, there is a need to provide a new lens module to overcome the above-mentioned deficiencies.

  An object of the present invention is to provide a lens module having good coaxiality and high stability.

  The technical solution of the present invention is as follows. A lens module, comprising a lens barrel and a lens group housed in the lens barrel, wherein the lens group includes a first lens and a second lens sequentially stacked from the object side to the image side. Each of the first lens and the second lens includes an optical imaging portion and a peripheral portion provided around the optical imaging portion, and the peripheral portion of the second lens is By forming a fitting structure with the periphery of one lens, the lens is positioned in the lens barrel, and the fitting structure includes a first fitting part positioned at the periphery of the first lens, and a second A second fitting portion located at a peripheral edge of the first lens, and the first fitting portion extends in a horizontal direction sequentially in the direction from the edge of the first lens to the optical axis. A first inclined plane extending from the first plane to the image side and extending from the first inclined plane to the image side. And a second flat surface extending horizontally from the second slant surface, wherein the second fitting portion is sequentially arranged in the direction from the edge of the second lens to the optical axis. A third plane bonded to the first plane, a third slope extending from the third plane to the image side, and a third plane extending from the third slope to the image side. 4 and a fourth plane extending horizontally from the fourth slope, the first slope and the third slope are at least partially in close contact with each other, and the second slope and the second slope An empty gap is formed between the four slopes, and the second plane is disposed to face the fourth plane.

  Preferably, the lens barrel includes an inner wall and an outer wall facing the inner wall, and the second lens is disposed with a space from the inner wall of the lens barrel.

  Preferably, when the slope of the first slope in the first lens is equal to the slope of the second slope, the slope of the third slope in the second lens is not equal to the slope of the fourth slope. .

  Preferably, when the slope of the third slope in the second lens is equal to the slope of the fourth slope, the slope of the first slope in the first lens is equal to the slope of the second slope. Absent.

  Preferably, the first inclined surface and the optical axis form a first depression angle, and the first depression angle is not less than 0 ° and less than 90 °.

  Preferably, the second inclined surface and the optical axis form a second depression angle, and the second depression angle is not less than 0 ° and less than 90 °.

  Preferably, the third inclined surface and the optical axis form a third depression angle, and the third depression angle is not less than 0 ° and less than 90 °.

  Preferably, the fourth inclined surface and the optical axis form a fourth depression angle, and the fourth depression angle is not less than 0 ° and less than 90 °.

  Preferably, the lens module further includes a light shielding sheet, and the light shielding sheet is disposed between the second plane of the first lens and the fourth plane of the second lens.

  Preferably, the lens group further includes at least one third lens disposed below the second lens, the second lens, and a third lens adjacent to the second lens; Positions the third lens in the lens barrel by the fitting structure.

  The present invention has the following beneficial effects. Due to the fitting structure between the lenses, the coaxiality of each lens in the lens group can be ensured, and the mounting stability can be improved.

It is a schematic diagram which shows the structure of the 1st Example of the lens module which concerns on this invention. It is an enlarged view of A part in the 1st Example of the lens module which concerns on this invention. It is a schematic diagram which shows the structure of the lens barrel in the 1st Example of the lens module which concerns on this invention. It is a schematic diagram which shows the structure of the 1st lens in 1st Example of the lens module which concerns on this invention. It is a schematic diagram which shows the structure of the 2nd lens in 1st Example of the lens module which concerns on this invention. It is a schematic diagram which shows the structure of the 2nd Example of the lens module which concerns on this invention. It is an enlarged view of the A 'portion in the second embodiment of the lens module according to the present invention.

  Hereinafter, the present invention will be further described with reference to the drawings and embodiments.

<First embodiment>
As shown in FIG. 1 a, the lens module 100 includes a lens barrel 101 and a lens group installed in the lens barrel 101 and connected to the lens barrel 101. The lens barrel 101 includes a first cylindrical wall 101A in which a light passage hole 101C is opened, a second cylindrical wall 101B that is bent and extended from the first cylindrical wall 101A, a first cylindrical wall 101A, and a second cylindrical wall 101A. And an accommodation space 101D formed by the cylinder wall 101B. The lens group includes a first lens 102, a second lens 103, a third lens 104, and a fourth lens 105 that are sequentially stacked from the object side to the image side. The second lens 103, the third lens 104, and the fourth lens 105 are disposed in the axial direction of the lens barrel 101.

  Each of the first lens 102, the second lens 103, the third lens 104, and the fourth lens 105 includes an upper surface, a lower surface facing the upper surface, the upper surface, A side surface connecting the lower surface, and the side surface of the second lens 103 and the side surface of the third lens 104 do not contact the second cylindrical wall 101B, but the side surface of the first lens 102 and the fourth lens The side surface 105 is in contact with the second cylindrical wall 101B.

  As shown in FIG. 2, the first lens 102 includes an upper surface 102A, a lower surface 102B facing the upper surface 102A, and a side surface 102C connecting the upper surface 102A and the lower surface 102B.

  As shown in FIG. 3, the second lens 103 includes an upper surface 103A, a lower surface 103B that faces the upper surface 103A, and a side surface 103C that connects the upper surface 103A and the lower surface 103B.

  As shown in FIG. 1c, a surface of the first cylindrical wall 101A facing the accommodation space 101D is provided with a first contact portion 101E that contacts the upper surface of the first lens, and the second cylindrical wall 101B. The surface facing the housing space 101D is provided with a second contact portion 101F that contacts the side surface of the first lens 102 and a third contact portion 101G that contacts the side surface of the fourth lens 105. ing. The second contact portion 101F contacts the side surface of the first lens 102, whereby the first lens 102 and the lens barrel 101 have a common optical axis. The third abutting portion 101G abuts against the side surface of the fourth lens 105, whereby the fourth lens 105 and the lens barrel 101 have a common optical axis.

  As shown in FIG. 2, the first lens 102 includes an optical imaging unit 102F and a peripheral part 102E provided around the optical imaging part 102F, and the first fitting part is provided on the peripheral part 102E. 1111 are provided, and the first fitting portion 1111 includes a first plane 1021 that extends horizontally in the direction from the edge of the first lens 102 to the optical axis, and a first plane 1021. A first slope 1022 extending from the first slope 1022 toward the image side, a second slope 1023 extending from the first slope 1022 toward the image side, and a second slope extending horizontally from the second slope 1023 A plane 1024.

  As shown in FIG. 3, the second lens 103 includes an optical imaging portion 103F and a peripheral portion 103E provided around the optical imaging portion 103F, and the peripheral portion 103E has a second fitting portion. 1112 are provided, and the second fitting portion 1112 includes a third plane 1031 extending horizontally in the direction from the edge of the second lens 103 to the optical axis, and an image side from the third plane 1031. A third slope 1032 inclined and extending toward the image side, a fourth slope 1033 extending inclined from the third slope 1032 toward the image side, and a fourth plane 1034 extending horizontally from the fourth slope 1033 Is provided.

  As shown in FIGS. 1 a and 1 b, the first fitting portion 1111 and the second fitting portion 1112 form the fitting structure 111, thereby positioning the second lens 103 in the lens barrel 101. That is, the peripheral edge portion 103E of the second lens 103 is positioned in the lens barrel 101 by forming the peripheral edge portion 102E of the first lens 102 and the fitting structure 111, whereby the second lens 103 and the second lens 103 are aligned with each other. One lens 102 has a common optical axis. Note that the first plane 1021 and the third plane are bonded to each other, and the first slope 1022 and the third slope 1032 are at least partially in close contact with each other, and the second slope 1023 and the fourth slope 1033 are An empty space is formed between the two, which makes it possible to reduce the generation of stray light by performing a matting process. The second plane 1024 is spaced from the fourth plane 1034.

  The first inclined surface 1022 and the optical axis form a first depression angle θ1 and satisfy 0 ° ≦ θ1 <90 °, thereby reducing deformation of the lens during assembly. The second inclined surface 1023 and the optical axis form a second depression angle θ2, which satisfies 0 ° ≦ θ2 <90 °. The third inclined surface 1032 and the optical axis form a third depression angle θ3 and satisfy 0 ° ≦ θ3 <90 °, thereby reducing the deformation of the lens during assembly. The fourth inclined surface 1033 and the optical axis form a fourth depression angle θ4 and satisfy 0 ° ≦ θ4 <90 °.

  In this embodiment, the slope of the first slope 1022 is not equal to the slope of the second slope 1023, but in other embodiments, the slope of the first slope 1022 may be equal to the slope of the second slope 1023. Good. However, when the slope of the first slope 1022 is equal to the slope of the second slope 1023, the slope of the third slope 1032 is not equal to the slope of the fourth slope 1033.

  In this embodiment, the slope of the third slope 1032 is not equal to the slope of the fourth slope 1033, but in other embodiments, the slope of the third slope 1032 is equal to the slope of the fourth slope 1033. Good. However, when the slope of the third slope 1032 is equal to the slope of the fourth slope 1033, the slope of the first slope 1022 is not equal to the slope of the second slope 1023.

  A first light shielding sheet 107 is provided between the second plane 1024 of the first lens 102 and the fourth plane 1034 of the second lens 103, and the first light shielding sheet 107 is a peripheral portion. Is used to block extra light rays and reduce stray light generation. The first light shielding sheet 107 has a hollow ring shape. In the present embodiment, the first light shielding sheet 107 is made of a black plastic material, but in other embodiments, the first light shielding sheet 107 is made of another material. The first light shielding sheet may be used to reduce the generation of stray light.

  Similarly, the second lens 103 and the third lens 104 are fitted and positioned by the same fitting structure, so that the third lens and the second lens have a common optical axis. And stably attached to the lens barrel.

  A second light-shielding sheet 108 is further provided between the second lens 103 and the third lens, and the second light-shielding sheet 108 blocks extra light rays at the peripheral portion and reduces the generation of stray light. Used to make The first light shielding sheet 107 has a hollow ring shape. In the present embodiment, the first light shielding sheet 107 is made of a black plastic material, but in other embodiments, the first light shielding sheet 107 is made of another material. The first light shielding sheet may be used to reduce the generation of stray light.

  A light shielding plate 109 is further provided between the third lens 104 and the fourth lens 105, and the light shielding plate 109 has a hollow ring shape so as to block stray light and improve the stability of the assembly. Used for. In this embodiment, the light shielding plate 109 is made of a plastic material. However, in other embodiments, the light shielding plate may be made of another material, for example, a metal material.

<Second embodiment>
As shown in FIGS. 4a to 4c, each component and function in the lens module 200 are the same as those in the above embodiment, and the difference is that in this embodiment, the first depression angle θ1 = 0 °, The third depression angle θ3 = 0 °. Therefore, the deformation of the lens during assembly is further reduced, and the stability of the assembly is further improved.

  What has been described above is merely an embodiment of the present invention, and those skilled in the art can make further improvements as long as they do not exceed the design principle of the present invention, and these modifications are also included in the protection scope of the present invention. Should be understood.

Claims (8)

A lens barrel and a lens group accommodated in the lens barrel, and the lens group includes a first lens and a second lens sequentially stacked from the object side to the image side, and the first lens Each of the lens and the second lens is a lens module including an optical imaging unit and a peripheral part provided around the optical imaging part, and the peripheral part of the second lens is the first module. By forming a fitting structure with the peripheral part of the lens, the lens is positioned in the lens barrel, and the fitting structure includes a first fitting part located at the peripheral part of the first lens, and a second fitting part. A second fitting portion located at a peripheral edge of the lens, wherein the first fitting portion is a first extending horizontally in the direction from the edge of the first lens to the optical axis. A plane, a first slope inclined and extending from the first plane to the image side, and an inclination extending from the first slope to the image side And a second flat surface extending horizontally from the second slant surface, wherein the second fitting portion is sequentially arranged in the direction from the edge of the second lens to the optical axis. A third plane bonded to the first plane, a third slope extending from the third plane to the image side, and a third plane extending from the third slope to the image side. 4 and a fourth plane extending horizontally from the fourth slope, the first slope and the third slope are at least partially in close contact, and the second slope and the An empty gap is formed between the fourth slope and the second plane is placed opposite to the fourth plane ,
The lens barrel includes an inner wall and an outer wall facing the inner wall, and the second lens is disposed at a distance from the inner wall of the lens barrel,
When the slope of the first slope in the first lens is equal to the slope of the second slope, the slope of the third slope in the second lens is not equal to the slope of the fourth slope. to lens module according. When the slope of the third slope in the second lens is equal to the slope of the fourth slope, the slope of the first slope in the first lens is not equal to the slope of the second slope. The lens module according to claim 1 . Wherein the first inclined surface and the optical axis forms a first included angle, a lens module according to claim 1 or 2 wherein the first included angle and less than 0 ° or more and 90 °. Wherein the second inclined surface and the optical axis forms a second included angle, a lens module according to claim 1 or 2, wherein the second included angle is less than 0 ° or more and 90 °. Wherein the third inclined surface and the optical axis forms a third included angle, a lens module according to claim 1 or 2, wherein the third included angle and less than 0 ° or more and 90 °. Wherein the fourth inclined surface and the optical axis forms a fourth included angle, a lens module according to claim 1 or 2, characterized in that said fourth included angle is less than 0 ° or more and 90 °.   The lens module further includes a light shielding sheet, and the light shielding sheet is disposed between a second plane of the first lens and a fourth plane of the second lens. The lens module according to Item 1. The lens group further includes at least one third lens disposed below the second lens, and the second lens and the third lens adjacent to the second lens are the fitting. the engagement structure, a lens module according to any one of claims 1 to 3, characterized in that position the said third lens in said barrel.