Patent Application
20200166728
The present disclosure relates to the field of pick-up lens, and more particularly, to a lens module.
With the continuous development of science and technology, electronic devices are continuously developing towards intelligence, and portable electronic devices such as tablet computers, cell phones and the like are also equipped with lens modules, except for digital cameras. In order to meet the needs of people, higher requirements for image quality of an object photographed by lens modules are also put forward.
In current lens structure, a circle bumpy ridge joining is adopted between lenses, but due to poor roundness of the bumpy ridge joining of the lenses, it is easy to be improperly assembled during assembly, thus affecting the performances of the lenses. In addition, a light shielding plate is generally matched with the lens at an outer circle, but due to the extremely poor roundness of the outer diameter of the light shielding plate, it is easy to be misaligned or not properly assembled during assembly, thus affecting the performances of the lens. The matching method between the components of the current lens still has much room for improvement. In order to achieve more stable matching between the components and improve the overall performances of the lens, it is necessary to provide a novel lens module.
In order to better understand the solutions of the present disclosure and advantages thereof in various aspects, the present disclosure will be described in further detail below with reference to the drawings through specific embodiments. In the following embodiments, a left-right direction in a principal plane is taken as a horizontal direction, and a direction in the principal plane perpendicular to the horizontal direction, i.e., an up-down direction in the principal plane is taken as a vertical direction. In the present disclosure, a direction of a central axis is parallel to the vertical direction.
Referring to
In the embodiment, as shown in
In order to improve a matching precision between the lenses and a yield rate of assembly, a structure of the first lens 21 and a structure of the second lens 27 are improved, and the detail solution is as follows.
As shown in
As shown in
Further, the object side surface of the peripheral portion 23 of the first lens 21 includes three second protrusions 24 evenly distributed along a circumference of the first lens 21, and the three second protrusions 24 are preferably arranged at equal intervals, but can also be arranged at unequal intervals. The second protrusion 24 protrudes from the first lens 21 towards the first surface 111 of the first barrel wall 11, and an end surface of an outer edge of the second protrusion 24 is attached to an inner wall surface of the second barrel wall 12. An upper surface of the second protrusion 24, i.e., an object side surface thereof is attached to the first surface 111 of the first barrel wall 11. The object side surface of the peripheral portion 23 of the first lens 21 further includes a first plane 211 connected with the second protrusion 24 and horizontally extending towards an optical axis X, and the first plane 211 is partially attached to the first surface 111 of the first barrel wall 11.
As shown in
In the embodiment, a structure of the second protrusion 24 is the same as that of the first protrusion 25, and a number of the second protrusion 24 and a number of the first protrusion 25 are both three, but not limited to three. Specifically, the second protrusion 24 includes an upper surface 241 adjacent to the object side, an inner end surface connected with the upper surface 241 and adjacent to the optical axis X, and an outer end surface close to the second barrel wall 12.
Further, the first surface 111 of the first barrel wall 11 includes a third recess 31 matched with a shape of the second protrusion 24. The third recess 31 has the same structure as that of the first recess 26. As can be seen from
Moreover, an image side surface of the peripheral portion of the second lens 27 includes a fourth recess as same as the first recess 26. A structure of a peripheral portion of a third lens 28 is the same as or different from a structure of the peripheral portion of the second lens 27. In addition, the lens group further includes a fourth lens 29 located at an image side of the third lens 28, and is not limited thereto. The example above is only used for illustration.
The present disclosure further provides a lens module, what is different from Embodiment 1 is that, a lens group 2 at least includes a lens matched with a shielding plate 4, and the lens is located at an object side of the shielding plate 4. In the embodiment, as shown in
As shown in
In the embodiment, the second recess 34 includes a second bottom surface 341, a third side wall 342 and a fourth side wall 343 both connected with the second bottom surface 341 and obliquely extending from the second bottom surface 341 towards the shielding plate 4. A width of the second recess 34 gradually decreases from the image side to the object side.
In the embodiment, three fourth protrusions 40 are provided, and a number of the fourth protrusion 40 is equal to a number of the second recess 34. The three fourth protrusions 40 are arranged at equal intervals along a circumference 4 the shielding plate. The third protrusion 33 and the fourth protrusion 40 have the same structure; therefore, the illustration on the third protrusion 33 is omitted.
Further, the fourth protrusion 40 includes a fourth side surface 41 adjacent to the object side, a fifth side surface 42 and a sixth side surface 43 located at two sides of the fourth side surface 41, the fourth side surface 41 is spaced apart from the second bottom surface 341, the fifth side surface 42 is attached to the third side wall 342, and the sixth side surface 43 is attached to the fourth side wall 343. The fourth protrusion 34 further includes a third end surface adjacent to the optical axis X and a fourth end surface adjacent to the second barrel wall 12. The third end surface is spaced apart from a corresponding side surface of the second recess 34. The fourth end surface is attached to the inner wall surface of the second barrel wall 12.
In the structure above, the three first protrusions 25 evenly divide the second lens 27 into three portions, and match with the first recess 26 of the first lens 21, so that bearing between the first lens 21 and the second lens 27 is smoother, thus not only ensuring an outer diameter precision of the lens, but also ensuring a matching precision of the lenses, and improving the stability of the lens. Similarly, the three fourth protrusions 40 evenly divide the shielding plate 4 into three portions, and matched with the second recess 34 of the third lens 28, so that bearing between the third lens 28 and the shielding plate 4 is smoother, thus not only ensuring an outer diameter precision of the lens, but also ensuring a matching precision of the lens and the shielding plate, and improving the stability of the lens.
Moreover, the lens group 2 further includes a fourth lens 29 located at an image side of the third lens 28, and a number of the lens is not limited thereto. In addition, a shielding member can be arranged among the lenses, and the shielding member can also be omitted.
Compared with the prior art, the lens module of the present disclosure can ensure outer diameter precision of each component, and the mutual matching between the lens and the lens barrel, the lens and the lens, and the lens and the shielding plate is more accurate, thus improving the stability of the lens; and has a high matching precision, is more stable to match with the lens barrel, thus improving an overall performance of the lens.
The description above is merely the embodiments of the present disclosure, and it should be pointed out that those of ordinary skills in the art may make improvements without departing from the concept of the present disclosure, and all these improvements shall belong to the scope of protection of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201821969336.9 | Nov 2018 | CN | national |
