CN109995919A - A kind of mobile lens zoom mechanism of multilayer cymbal type Piezoelectric Driving component - Google Patents

Abstract

A mobile phone lens zoom mechanism of a multi-layer cymbal-shaped piezoelectric driving component relates to the field of mobile phone shooting. The drive assembly is composed of multiple layers of cymbal-type piezoelectric drive units, and the lens group, lens bracket, and support base form a mobile phone lens zoom mechanism; the drive assembly is connected with the lens bracket and the support base. When the cymbal-shaped piezoelectric drive unit is excited by an external voltage The displacement deformation generated during the process is amplified by multi-layer superposition, which drives the lens holder to move along the optical axis direction, so as to realize the zooming of the lens. The number of drive components is greater than two. Compared with the currently used zoom system based on the electromagnetic voice coil motor, the present invention is more compact in structure, does not generate electromagnetic interference, realizes the adjustable displacement and angle of the lens optical device, and is more convenient in photographing images.

Description

A mobile phone lens zoom mechanism of a multi-layer cymbal-type piezoelectric drive assembly

technical field

The invention relates to a multi-layer cymbal piezoelectric-driven zoom mechanism for a mobile phone lens with an active zoom function, belonging to the field of electronic equipment.

Background technique

Taking pictures is one of the most commonly used functions of smartphones in life. People's requirements for image quality are constantly improving. In order to obtain clear and accurate images, zooming plays an important role. Every upgrade of mobile phone zoom technology can greatly improve the mobile phone It can adapt to different focal length requirements of complex scenes. In the mobile phone camera, the focal length is changed from the initial focal length to the optical zoom. In the optical zoom mobile phone, the current optical zoom component of the mobile phone is driven by a voice coil motor, which uses the electromagnetic force generated by the electric coil and the permanent magnet. Static magnetism to control the movement of the lens. But because of the magnetic field, radiation and electromagnetic interference, it needs to be shielded.

Therefore, in view of the current common problems: (1) At present, most of the lens modules of mobile phones are fixed lens modules and do not have the optical zoom function. (2) A few cameras that can perform optical zoom use a voice coil motor mechanism for zooming, and there is magnetic field interference. (3) The development trend of mobile phones is highly integrated, miniaturized and lightweight. By reducing the space volume of the zoom structure, the urgent demand for compact space in mobile phones can be effectively met. The invention proposes a new principle to drive the lens, adopts the inverse piezoelectric effect in the piezoelectric theory, and excites the driving component formed by the superposition of the cymbal-shaped piezoelectric driving unit through the external voltage to drive the zoom of the mobile phone lens. The invention has the advantages of fast response. , The advantage of large driving force, because no electromagnetic drive structure is used, the electromagnetic interference problem is greatly reduced, and at the same time, according to the driving voltage of the piezoelectric chip, the zoom stroke of the lens can be precisely controlled, compared with the current mainstream application technology. , the lens zoom system driven by the piezoelectric structure is more compact, and the structure is simplified, and the cost of the zoom mechanism is also lower.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, the present invention proposes a zoom mechanism of a mobile phone lens, which is driven by piezoelectricity and has a compact structure and does not generate magnetic field interference.

A multi-layer cymbal piezoelectric-driven mobile phone lens zoom mechanism, which is characterized by comprising: a piezoelectric drive assembly 2, a lens group 3, a lens bracket 1, and a support base 4 to form a mobile phone lens zoom mechanism, the drive assembly, the lens bracket and the support The base 4 is connected, and the displacement deformation generated when the piezoelectric vibrator is excited by an external voltage is amplified by the multi-layer cymbal drive unit, which drives the lens bracket to move, thereby realizing the zooming of the lens.

The number of piezoelectric driving components 2 is at least two, generally four. Thus, supporting the lens holder 1 and connecting the lens holder 1 and the supporting base 4 are realized.

The piezoelectric vibrator drive unit is composed of a piezoelectric substrate and a piezoelectric wafer. The piezoelectric substrate is a cymbal-shaped metal sheet. The piezoelectric wafer is in the middle of the cymbal-shaped substrate. The two ends of the wafer are fixed with the substrate to form a cymbal-shaped piezoelectric vibrator. When the excitation voltage is applied to the piezoelectric vibrator, the piezoelectric wafer shrinks along the axial direction, and the vertical displacement of the cymbal-shaped substrate is shortened while the axial displacement is shortened.

The lens holder 1 plays the role of fixing and protecting the lens group 3 and connecting the piezoelectric drive assembly 2, and can guarantee deflection and movement with the change of the displacement of the piezoelectric drive assembly 2, so that the distance and angle of the lens group 3 change, Thereby changing the focal length and angle.

The piezoelectric driving device is fixedly connected to the lens holder 1 and the support base 4 , and positioning grooves are opened on the lens holder 1 and the support base 4 to ensure their mutual positions.

The invention has the advantages of compact structure, fast response speed, accurate displacement, no electromagnetic interference and no electromagnetic interference at all, and is more advanced than the current mainstream zoom technology.

Description of drawings

Figure 1 is a schematic diagram of the exploded structure of the invention.

FIG. 2 is a schematic structural diagram of the piezoelectric drive assembly.

FIG. 3 is a schematic diagram of the cymbal-type driving unit.

FIG. 4 is a schematic diagram of the deformation of the cymbal-type driving unit.

FIG. 5 is a schematic diagram of the lens holder.

FIG. 6 is a schematic diagram of the support base.

FIG. 7 is a central sectional view of the lens group.

1—Lens holder, 2—Piezoelectric drive assembly, 3—Lens group, 4—Support base, 101—Lens holder positioning groove, 102—Lens holder thread, 201—cymbal piezoelectric drive unit , 202 - Substrate, 203 - Piezoelectric wafer, 204 - Adhesive layer, 301 - Lens group thread, 401 - Support base positioning groove

Detailed ways

The specific structural embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a schematic diagram of the exploded structure of the present invention. The present invention is a multi-layer cymbal piezoelectric-driven mobile phone lens zoom mechanism, which is characterized by comprising: a piezoelectric drive assembly 2, a lens group 3, a lens bracket 1, and a support base 4 to form a mobile phone lens zoom mechanism, and the drive assembly 2 and the lens group 3. The lens holder 1 is connected with the support base 4 .

Referring to FIG. 2 , a schematic structural diagram of the piezoelectric drive assembly 2 of the present invention, the piezoelectric drive assembly 2 is formed by superimposing a cymbal-type piezoelectric drive unit 201 . The piezoelectric vibrator drive unit is composed of a piezoelectric substrate and a piezoelectric wafer. The piezoelectric substrate is a cymbal-shaped metal sheet. The piezoelectric wafer is in the middle of the cymbal-shaped substrate. The two ends of the wafer are fixed with the substrate to form a cymbal-shaped piezoelectric vibrator. When the excitation voltage is applied to the piezoelectric vibrator, the piezoelectric wafer shrinks in the axial direction, and the vertical displacement of the cymbal-type substrate is shortened while the axial displacement is shortened (Fig. 4).

Referring to FIG. 1 , a schematic diagram of the exploded structure of the present invention. The lens holder 1 plays the role of fixing and protecting the lens group 3 and connecting the piezoelectric drive assembly 2, and can guarantee deflection and movement with the change of the displacement of the piezoelectric drive assembly 2, so that the distance and angle of the lens group 3 change, Thereby changing the focal length and angle.

Referring to FIG. 5 , a schematic diagram of a lens holder of the present invention, and FIG. 6 , a schematic diagram of a support base 4 of the present invention. The piezoelectric drive assembly 2 is connected and fixed to the lens holder 1 and the support base 4 , and positioning grooves 101 and 401 are opened on the lens holder 1 and the support base 4 to ensure their mutual positions.

Referring to FIG. 5 , a schematic diagram of the lens holder of the present invention, and FIG. 7 , a cross-sectional view of the lens group 3 along the center. The lens group 3 and the lens holder 1 are fixed by means of the housing thread 301 of the lens group 3 and the thread 102 of the lens holder 1 .

Claims (5)

1. a mobile phone lens zoom mechanism of a multi-layer cymbal type piezoelectric drive assembly, it is characterized in that comprising: piezoelectric drive assembly (2) and lens group (3), lens support (1), support base (4) form a mobile phone The lens zoom mechanism, the piezoelectric drive assembly (2) is connected with the lens bracket (1) and the support base (4), the deformation generated when the piezoelectric vibrator is excited by an external voltage is amplified by the lead of the multi-layer cymbal-shaped unit to drive the lens The stand moves, allowing the lens to zoom. 2. The mobile phone lens zoom mechanism of a multilayer cymbal-type piezoelectric drive assembly according to claim 1, wherein the number of the piezoelectric drive assemblies (2) is at least two, or four ; The piezoelectric drive assembly (2) plays the role of supporting the lens bracket (1) and the supporting base (4) in addition to adjusting the displacement. 3. The mobile phone lens zoom mechanism of a multi-layer cymbal-type piezoelectric drive assembly according to claim 1, wherein the lens support (1) itself can guarantee the change with the displacement of the piezoelectric drive assembly (2) Deflection or movement occurs to change the distance or angle of the lens group (3), thereby changing the focal length or shooting angle. 4. The mobile phone lens zoom mechanism of a multilayer cymbal-type piezoelectric drive assembly according to claim 1, wherein the piezoelectric drive assembly (2) is composed of one or more layers of the cymbal-type piezoelectric drive unit 201 superimposed. 5. A mobile phone lens zoom mechanism of a multilayer cymbal-type piezoelectric drive assembly according to claim 4, wherein the cymbal-type piezoelectric drive unit is formed by bonding a metal substrate and a piezoelectric wafer The piezoelectric substrate is a cymbal-shaped metal sheet, the piezoelectric chip is in the middle of the cymbal-shaped substrate, and the two ends of the chip are fixed with the substrate to form a cymbal-shaped piezoelectric vibrator. When a voltage is applied to the piezoelectric vibrator, the piezoelectric chip shrinks in the axial direction , while the axial displacement of the cymbal-type substrate is shortened, the vertical displacement is increased.