CN-122002132-A - Zoom mechanism and lens driving device

CN122002132ACN 122002132 ACN122002132 ACN 122002132ACN-122002132-A

Abstract

The invention belongs to the technical field of optical imaging equipment, and particularly relates to a zooming mechanism and a lens driving device, wherein the zooming mechanism comprises a circuit board, the circuit board comprises a top circuit board and a bottom circuit board, the top circuit board is used for installing an image sensor, the top circuit board is connected with a driven part, the bottom circuit board is positioned below the top circuit board, one end of the bottom circuit board is connected with the top circuit board, the bottom circuit board is fixed on a base, the driving mechanism is arranged on the base and provided with a driving end capable of performing longitudinal movement, and the driving end of the driving mechanism is connected with or abutted against the driven part and drives the top circuit board to perform longitudinal movement. The invention supports and resets the top circuit board and the image sensor by the bending elastic force of the circuit board, and has good stability and resetting effect.

Inventors

WU MENLONG
WANG RENDE
PENG KUN
LIN CONG
LIU FUQUAN
LV XINKE

Assignees

河南皓泽电子股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260324

Claims (10)

1. A zoom mechanism comprising a base, the zoom mechanism comprising: The circuit board comprises a top circuit board and a bottom circuit board, the top circuit board is used for installing the image sensor, the top circuit board is connected with a driven part, the bottom circuit board is positioned below the top circuit board, one end of the bottom circuit board is connected with the top circuit board, and the bottom circuit board is fixed on the base; The driving mechanism is arranged on the base and provided with a driving end capable of longitudinally moving, the driving end of the driving mechanism is connected with or abutted against the driven part, and the driving mechanism drives the top circuit board to longitudinally move.
2. The zoom mechanism of claim 1, wherein the circuit board is an FPC board; And/or, bending the circuit board to form the top circuit board and the bottom circuit board; and/or, the zooming mechanism further comprises an image sensor, and the image sensor is arranged at the top end of the top circuit board.
3. The zoom mechanism of claim 1, wherein the zoom mechanism further comprises: The position sensor is arranged at the bottom end of the top circuit board, and the top circuit board supplies power for the position sensor; The induction magnet is arranged on the base, the induction magnet is arranged opposite to the position sensor, and the longitudinal movement position monitoring of the image sensor is realized through the cooperation of the induction magnet and the position sensor.
4. The zoom mechanism of claim 1, wherein the zoom mechanism further comprises: The carrier, the carrier is fixed the top circuit board bottom, be provided with on the carrier driven portion, the carrier below is provided with actuating mechanism, by actuating mechanism drives the carrier with the top circuit board carries out longitudinal movement.
5. The zoom mechanism according to claim 4, wherein, the zoom mechanism further includes an abutment assembly comprising: The fixing protrusion is arranged on the base, one side, close to the driving mechanism, of the fixing protrusion is used as a fixing surface, and a mounting hole is formed in the fixing surface; The guide plate is positioned in front of the fixed surface, and two ends of the guide plate are connected with two adjacent side surfaces of the fixed surface; the elastic element is positioned between the guide plate and the fixing protrusion, one end of the elastic element is in butt joint or connection with the guide plate, and the other end of the elastic element extends into the mounting hole; The support comprises a support body, a guide plate, a driven part, an elastic element, a support plate, a guide plate and a driving end of the driving mechanism, wherein the support plate is arranged at one side of the support body, which is close to the driving mechanism, of the support body; Preferably, the bottom circuit board is provided with a hollow hole which is longitudinally communicated, the hollow hole is used for avoiding the carrier, the driving mechanism and the abutting component, and the carrier, the driving mechanism and the abutting component are located at the inner side of the hollow hole.
6. The zoom mechanism according to claim 5, wherein the sides of the fixing protrusions adjacent to the fixing surface are provided with buckles, the sides of the two ends of the guide plate are provided with clamping grooves, and the guide plate and the fixing protrusions are clamped with the clamping grooves through the buckles to realize clamping connection; and/or a supporting bulge is arranged at the other side of the bottom end of the carrier, far away from the abutting plate, a supporting bulge avoiding groove is formed in the base, and the supporting bulge is inserted into the supporting bulge avoiding groove; and/or an abutting part is extended from one side end part of the carrier, which is close to the abutting plate, an abutting groove is formed at the top end of the fixing protrusion, and the abutting part is arranged in the abutting groove.
7. The zoom mechanism according to claim 5, wherein a guide plate guide groove is formed in one side of the guide plate, which is close to the carrier, and an abutting plate guide groove is formed in the side wall of the abutting plate, which is close to the guide plate, and the abutting plate guide groove and the guide plate guide groove are longitudinally and oppositely arranged in the length direction, and balls are clamped between the abutting plate guide groove and the guide plate guide groove; Preferably, the bottom end of the fixing protrusion is provided with a limiting protrusion, and the limiting protrusion is located below the ball.
8. The zoom mechanism of claim 5, further comprising a housing forming a hollow cavity with the base, the circuit board, the drive mechanism, the carrier, and the abutment assembly being located within the hollow cavity; Preferably, one end of the bottom circuit board protrudes out of the hollow cavity for electrical connection with an external circuit.
9. A zoom mechanism according to any one of claims 1 to 8, wherein the driven portion is a friction plate; the driving mechanism adopts a piezoelectric mechanism, and the piezoelectric mechanism comprises: The cantilever beam is fixedly connected with the base at one end, the other end of the cantilever beam is suspended, a vibration bulge is arranged at the other end suspended on the cantilever beam, and the vibration bulge is contacted with the friction plate; the piezoelectric block is arranged at the top end of the cantilever beam and is powered by the bottom circuit board; When the piezoelectric block is electrified to generate deformation, one end suspended on the cantilever beam can generate longitudinal vibration, and under the vibration action of the cantilever beam, the top circuit board generates longitudinal movement action; preferably, the cantilever beam comprises two parallel cantilevers and a connecting arm connected with the ends of the cantilevers, so that the cantilever beam forms a U-shaped structure, the cantilevers Liang Hengwo, the two cantilevers are far away from one end of the connecting arm and fixedly connected with the base, the two cantilevers are close to the other end of the connecting arm and are suspended, the top ends of the two cantilevers are respectively provided with one piezoelectric block, and the connecting arm is provided with the vibration bulge.
10. A lens driving apparatus, characterized in that the lens driving apparatus includes the zoom mechanism according to any one of claims 1 to 9.

Description

Zoom mechanism and lens driving device Technical Field The invention belongs to the technical field of optical image equipment, and particularly relates to a zoom mechanism and a lens driving device. Background With the development of technology, many electronic devices (such as smart phones or digital cameras) have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides more options for the user. In practical application, in order to meet shooting requirements in diversified scenes, focusing and anti-shake operations are required to be frequently performed on a lens. Under the prior art system, an image sensor which is usually arranged opposite to a lens is fixed, the lens is driven by a lens driving device to perform triaxial movement relative to the image sensor, specifically, the lens driving device drives the lens to move along the direction of an optical axis so as to realize focal length adjustment, and the lens driving device drives the lens to move along the direction perpendicular to the optical axis so as to prevent the lens from shaking, and further, the functions of automatic focusing and anti-shake are achieved. In other words, the conventional lens driving device generally moves in three axes relative to the image sensor by means of the carrier and the lens connected to the carrier, so as to achieve the objective of auto-focusing and anti-shake. In the above-mentioned manner of achieving the optical zoom and the optical anti-shake function by the movement of the same component (carrier), it is difficult to effectively solve the defocus problem in the shooting process because the movement range of the carrier is limited by factors such as weight and volume. Therefore, how to realize stable focusing movement and resetting effect is a problem that the skilled person needs to deeply think. Disclosure of Invention The present invention is directed to the above-mentioned problems, and an object of the present invention is to provide a zoom mechanism and a lens driving device. A zoom mechanism, the zoom mechanism comprising: A base; The circuit board comprises a top circuit board and a bottom circuit board, the top circuit board is used for installing the image sensor, the top circuit board is connected with a driven part, the bottom circuit board is positioned below the top circuit board, one end of the bottom circuit board is connected with the top circuit board, and the bottom circuit board is fixed on the base; The driving mechanism is arranged on the base and provided with a driving end capable of longitudinally moving, the driving end of the driving mechanism is connected with or abutted against the driven part, and the driving mechanism drives the top circuit board to longitudinally move. Optionally, the circuit board adopts an FPC board. Optionally, the circuit board is bent to form the top circuit board and the bottom circuit board. Optionally, the zooming mechanism further comprises an image sensor, and the image sensor is arranged at the top end of the top circuit board. Optionally, the zooming mechanism further comprises: The position sensor is arranged at the bottom end of the top circuit board, and the top circuit board supplies power for the position sensor; The induction magnet is arranged on the base, the induction magnet is arranged opposite to the position sensor, and the longitudinal movement position monitoring of the image sensor is realized through the cooperation of the induction magnet and the position sensor. Optionally, the zooming mechanism further comprises: The carrier, the carrier is fixed the top circuit board bottom, be provided with on the carrier driven portion, the carrier below is provided with actuating mechanism, by actuating mechanism drives the carrier with the top circuit board carries out longitudinal movement. Optionally, the zoom mechanism further comprises an abutment assembly comprising: The fixing protrusion is arranged on the base, one side, close to the driving mechanism, of the fixing protrusion is used as a fixing surface, and a mounting hole is formed in the fixing surface; The guide plate is positioned in front of the fixed surface, and two ends of the guide plate are connected with two adjacent side surfaces of the fixed surface; the elastic element is positioned between the guide plate and the fixing protrusion, one end of the elastic element is in butt joint or connection with the guide plate, and the other end of the elastic element extends into the mounting hole; The support is characterized in that an abutting plate is arranged on one side of the bottom end of the carrier and located between the guide plate and the driving end of the driving mechanism, the driven part is arranged on one side, close to the driving mechanism, of the abutting plate, the guide plate is tightly abutted to the abutting plate under t