US-12625413-B2 - Aperture adjusting apparatus, camera module, and mobile terminal

US12625413B2US 12625413 B2US12625413 B2US 12625413B2US-12625413-B2

Abstract

The disclosure provides an aperture adjusting apparatus, a camera module, and a mobile terminal. The aperture adjusting apparatus includes a cover plate assembly and a base assembly. The cover plate assembly covers the base assembly and forms an accommodating space with the base assembly. The aperture adjusting apparatus further includes a rotating support, a driving magnet, a driving coil, a first magnetic piece, and a blade assembly arranged in the accommodating space. The rotating support is rotatably arranged inside the accommodating space. The driving magnet is arranged on a circumferential side wall of the rotating support, and the driving magnet is formed by combining at least two single-pole magnetic strips or is directly formed by a multi-stage magnet that is integrally formed; the first magnetic piece is arranged on the cover plate assembly corresponding to the driving magnet.

Inventors

Gaofeng GONG
Jianjun Xiang

Assignees

SHANGHAI BILLU ELECTRONICS CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20240508
Priority Date: 20230309

Claims (20)

1 . An aperture adjusting apparatus, comprising a cover plate assembly and a base assembly, wherein the cover plate assembly covers the base assembly and forms an accommodating space with the base assembly; the aperture adjusting apparatus further comprises the following parts arranged in the accommodating space: a rotating support, the rotating support being rotatably arranged inside the accommodating space; a driving magnet, the driving magnet being arranged on a circumferential side wall of the rotating support, and the driving magnet being formed by combining at least two single-pole magnetic strips or being directly formed by a multi-stage magnet that is integrally formed; a driving coil, there being at least one driving coil, and all driving coils being arranged on a circumferential side wall of the base assembly corresponding to the driving magnet; a first magnetic piece, the first magnetic piece being arranged on the cover plate assembly corresponding to the driving magnet; and a blade assembly, the blade assembly being arranged on a side, facing the cover plate assembly, of the base assembly, and blade assembly being movably connected to the rotating support and rotating along with the rotating support.
2 . The aperture adjusting apparatus according to claim 1 , wherein the aperture adjusting apparatus further comprises a second magnetic piece, wherein the second magnetic piece is arranged on the circumferential side wall of the base assembly corresponding to the driving magnet.
3 . The aperture adjusting apparatus according to claim 1 , wherein magnetization directions of the single-pole magnetic strips are all arranged in a radial direction of the rotating support, and the magnetization directions of two adjacent single-pole magnetic strips are opposite.
4 . The aperture adjusting apparatus according to claim 3 , wherein a quantity of the single-pole magnetic strips is N, a quantity of the driving coils is N−1, and two adjacent single-pole magnetic strips are correspondingly provided with one driving coil.
5 . The aperture adjusting apparatus according to claim 1 , wherein the driving magnet comprises at least three single-pole magnetic strips; each of the single-pole magnetic strips comprises a first single-pole magnetic strip and a second single-pole magnetic strip; the single-pole magnetic strips located at two ends of the plurality of single-pole magnetic strips are the first single-pole magnetic strips; the second single-pole magnetic strip is arranged between two adjacent first single-pole magnetic strips; a magnetization direction of the first single-pole magnetic strip is set in the radial direction of the rotating support; and a magnetization direction of the second single-pole magnetic strip is set parallel to a circumferential direction of the rotating support.
6 . The aperture adjusting apparatus according to claim 5 , wherein a quantity of the driving coils is M, a quantity of the single-pole magnetic strips is 2M+1, and two adjacent first single-pole magnetic strips are correspondingly provided with one driving coil.
7 . The aperture adjusting apparatus according to claim 1 , wherein a circumferential length of the driving magnet corresponding to the rotating support is less than half of a circumferential length of the rotating support.
8 . The aperture adjusting apparatus according to claim 1 , wherein the cover plate assembly comprises: a cover plate body, wherein the cover plate body covers the base assembly and abuts against a top surface of the rotating support; and a blocking piece, wherein the blocking piece is arranged on a side, far away from the base assembly, of the cover plate body, and a reflectivity of the blocking piece is less than that of the cover plate body.
9 . The aperture adjusting apparatus according to claim 8 , wherein a surface of the blocking piece has a coating film; and/or the cover plate body is made of plastics, and the cover plate body is internally embedded with a metal plate.
10 . The aperture adjusting apparatus according to claim 1 , wherein a side, facing the base assembly, of the cover plate assembly has a plurality of fixed protrusions; the base assembly is provided with a plurality of fixed grooves corresponding to the plurality of fixed protrusions; and each fixed groove matches at least one fixed protrusion.
11 . The aperture adjusting apparatus according to claim 1 , wherein a side, facing the rotating support, of the cover plate assembly has a plurality of abutting protrusions; a periphery of a side surface, facing the cover plate assembly, of the rotating support has an annular sunken area; and the abutting protrusions abut against the sunken area.
12 . The aperture adjusting apparatus according to claim 1 , wherein the base assembly comprises: a base body, wherein the cover plate assembly covers the base body and an anti-collision clearance is reserved between the rotating support and the base body; and an electrical connection part, wherein at least part of the electrical connection part is arranged around a circumferential side wall of the base body, and the driving coil is arranged on the electrical connection part and is electrically conductive to the electrical connection part.
13 . The aperture adjusting apparatus according to claim 12 , wherein a bottom surface of the base body has at least one anti-collision boss extending towards the rotating support.
14 . The aperture adjusting apparatus according to claim 13 , wherein the bottom surface of the base body has at least one limiting boss extending towards the rotating support; the rotating support is provided with at least one limiting groove corresponding to the limiting boss; at least part of the limiting boss is located inside the limiting groove; and in a rotating direction of the rotating support, a length of the limiting groove is greater than that of the limiting boss, a height of the limiting boss is greater than that of the anti-collision boss.
15 . The aperture adjusting apparatus according to claim 12 , wherein the electrical connection part comprises: a Flexible Printed Circuit (FPC) board, wherein at least part of the FPC board is arranged around the circumferential side wall of the base body, and the driving coil is arranged on the FPC board; and a position detection part, wherein the position detection part is arranged in an annular space of the driving coil and is electrically conductive to the FPC board, a strengthening plate is arranged at a position, at least corresponding to the driving coil, of the FPC board, and the strengthening plate is made of plastics.
16 . The aperture adjusting apparatus according to claim 12 , wherein the aperture adjusting apparatus further comprises at least two groups of rolling assemblies, wherein the rotating support is in clearance fit with a circumferential inner side wall of the base body; the circumferential inner side wall of the base body is provided with two mounting grooves respectively corresponding to the two groups of rolling assemblies; at least part of the rolling assembly is arranged inside the mounting groove; and at least other part of the rolling assembly protrudes from the mounting groove and is in rolling connection with a circumferential side wall of the rotating support.
17 . The aperture adjusting apparatus according to claim 16 , wherein the rotating support is provided with two chutes respectively corresponding to the two groups of rolling assemblies; the rotating support is provided with a magnet mounting groove corresponding to the driving magnet; at least part of the driving magnet is located inside the magnet mounting groove; the two chutes are respectively formed in both ends of the magnet mounting groove; and in a rotating direction of the rotating support, a length of the chute is greater than or equal to a rotating distance of the rotating support.
18 . The aperture adjusting apparatus according to claim 16 , wherein the rolling assembly comprises: at least three rolling balls, wherein the three rolling balls are arranged in a Z-axial direction; or a roller, wherein an axial direction of the roller is parallel to the Z-axial direction.
19 . A camera module, comprising the aperture adjusting apparatus according to claim 1 .
20 . A mobile terminal, comprising the camera module according to claim 19 .

Description

CROSS-REFERENCE TO RELATED APPLICATION The disclosure claims the benefit of priority to Chinese Patent Application No. 202320444224.6, filed with the Chinese Patent Office on Mar. 9, 2023 and entitled “Aperture Adjusting Apparatus, Camera Module, and Mobile Terminal”, which is incorporated in its entirety herein by reference. TECHNICAL FIELD The disclosure relates to the field of optical lens device, and in particular, to an aperture adjusting apparatus, a camera module, and a mobile terminal. BACKGROUND OF THE INVENTION At present, electronic devices such as smart phones and tablet computers have become indispensable electronic products in lives of people. With continuous development of electronic device industry, functions of the electronic devices are gradually becoming diversified and intelligent. A shooting function has become one of essential functions of the electronic devices. To achieve a photographing effect close to that of a single lens reflex camera on the electronic devices such as a mobile phone, a light input amount of a camera module needs to be adjusted according to a photographing environment. Configuring a variable aperture for the camera module is a means for adjusting the light input amount. An existing magnetoelectric variable aperture includes a fixed part, a rotating part, a plurality of blades, and an upper cover. A plurality of groups of magnet coil driving assemblies symmetrically arranged in a circumferential direction act to generate an electromagnetic driving force, so that the rotating part rotates relative to the fixed part, and the rotating part pushes the plurality of blades to open and close. An existing structure has the problems: 1, the plurality of groups of magnet coil driving assemblies symmetrically arranged in the circumferential direction easily interfere with a Voice Coil Motor (VCM) and a Hall chip to affect a push force and driving precision; and 2, the upper cover is fixed to the fixed part, the upper cover matches the fixed part to prevent the blades from escaping. However, the upper cover easily deforms to extrude the blades due to the impact of the rotating part, which leads to the deformation and damage of the blades and affects the performance and service life of the variable aperture. Therefore, there are problems that the variable aperture has poor driving precision and the upper cover is prone to damage in a related technology. SUMMARY OF THE INVENTION Some embodiments of the disclosure provides an aperture adjusting apparatus, a camera module, and a mobile terminal to solve problems that a variable aperture has poor driving precision and an upper cover is prone to damage in a related technology. According to one embodiment of the disclosure, an aperture adjusting apparatus is provided, including a cover plate assembly and a base assembly. The cover plate assembly covers the base assembly and forms an accommodating space with the base assembly. The aperture adjusting device further includes a rotating support, a driving magnet, a driving coil, a first magnetic piece, and a blade assembly that are arranged inside the accommodating space. The rotating support is rotatably arranged inside the accommodating space. The driving magnet is arranged on a circumferential side wall of the rotating support, and the driving magnet is formed by combining at least two single-pole magnetic strips or is directly formed by a multi-stage magnet that is integrally formed. There is at least one driving coil, and all driving coils are arranged on a circumferential side wall of the base assembly corresponding to the driving magnet. The first magnetic piece is arranged on the cover plate assembly corresponding to the driving magnet. The blade assembly is arranged on a side, facing the cover plate assembly, of the base assembly, and the blade assembly is movably connected to the rotating support and rotates along with the rotating support. In an embodiment, the aperture adjusting apparatus further includes a second magnetic piece. The second magnetic piece is arranged on the circumferential side wall of the base assembly corresponding to the driving magnet. In an embodiment, magnetization directions of the single-pole magnetic strips are all arranged in a radial direction of the rotating support, and the magnetization directions of two adjacent single-pole magnetic strips are opposite. In an embodiment, a quantity of the single-pole magnetic strips is N, a quantity of the driving coils is N−1, and two adjacent single-pole magnetic strips are correspondingly provided with one driving coil. In an embodiment, the driving magnet includes at least three single-pole magnetic strips. Each of the single-pole magnetic strips includes a first single-pole magnetic strip and a second single-pole magnetic strip. The single-pole magnetic strips located at two ends of the plurality of single-pole magnetic strips are the first single-pole magnetic strips. The second single-pole magnetic strip