Ultrasonic vibration cleaning assembly and cleaning module

Abstract

The utility model discloses an ultrasonic vibration cleaning assembly which comprises an optical lens and a piezoelectric transducer, a hydrophobic layer is arranged on the outer surface of the optical lens, and the piezoelectric transducer is arranged on the inner side or the outer side of the optical lens. Compared with the prior art, the optical lens has the advantages that the structure is simple and reasonable, the hydrophobic layer is arranged on the outer surface of the optical lens, the adsorption effect of the surface of the lens on pollutants such as water drops, water mist and dust is weakened, and under the assistance of the hydrophobic effect, the pollutants can be thoroughly removed only through small amplitude and inertia force.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera cleaning technical field, specifically a kind of ultrasonic vibration cleaning assembly and cleaning module. BACKGROUND

[0002] Camera technology has been widely used in automobile, automation, robot, security, consumer electronics and other industry fields, and the optical lens of the outermost layer of camera structure is very sensitive to external environment, which is easily polluted by water droplets, fog, dust, frost and the like, blocks light path and affects imaging quality. In the published patent (publication number US20210341731A1, US20180154406A1, US10838199B2), a piezoelectric transducer is added in the camera structure, and the piezoelectric transducer is driven by an alternating current signal to drive the optical lens to vibrate at ultrasonic frequency. When the amplitude is large enough, the inertia force generated can "shake off" the pollutants on the surface of the lens, thereby achieving the purpose of cleaning the lens.

[0003] Due to the existence of surface adsorption effect, the optical lens surface has inherent adsorption affinity to external pollutants such as water droplets, water mist and dust. Especially when the size of the pollutant particles is very small, the surface adsorption effect is stronger, and the pollutants are more likely to adhere to the lens surface, making it more difficult to shake off the pollutants by inertia force.

[0004] In order to completely remove the pollutants on the surface of the lens, a very high driving voltage must be applied in the technical solution disclosed in the above-mentioned patent to generate a larger amplitude, which is relatively high in circuit system cost. Moreover, the material of the optical lens is often brittle glass, which is very easy to break when the amplitude is large. High-frequency and high-intensity vibration can also cause fatigue failure of the camera structure. More importantly, even so, it is impossible to completely remove water droplets, fog, dust and frost by increasing the piezoelectric transducer, and there will always be a small amount of pollutants remaining, which is fatal to the imaging of the light path. Therefore, the camera cleaning technology needs to be further improved. UTILITY MODEL CONTENTS

[0005] The utility model aims at making up for the above-mentioned deficiencies, and discloses an ultrasonic vibration cleaning assembly and cleaning module which are simple in structure, reasonable and can effectively improve the pollutant removal effect.

[0006] The technical solution of the utility model is as follows:

[0007] An ultrasonic vibration cleaning assembly comprises an optical lens and a piezoelectric transducer, the outer surface of the optical lens is provided with a hydrophobic layer, and the piezoelectric transducer is arranged on the inner side or the outer side of the optical lens.

[0008] The measures for further optimizing the technical solution are as follows:

[0009] As an improvement, the hydrophobic layer is a non-polar material coating, a low surface energy material coating or a hydrophobic nano material coating.

[0010] As an improvement, the hydrophobic layer is a hydrophobic film.

[0011] As an improvement, the optical lens is provided with a piezoelectric transducer on both sides.

[0012] As an improvement, the piezoelectric transducer is a center-holed tubular structure.

[0013] As an improvement, the piezoelectric transducer is a multi-layer piezoelectric transducer or a single-layer piezoelectric transducer.

[0014] As an improvement, the multi-layer piezoelectric transducer is a multi-layer ring structure, the piezoelectric transducer comprises a plurality of piezoelectric material layers and a plurality of electrode layers, the piezoelectric material layers comprise a plurality of first piezoelectric material layers and a plurality of second piezoelectric material layers, each first piezoelectric material layer has the same polarization direction, each second piezoelectric material layer has the same polarization direction, and the polarization directions of the first piezoelectric material layers and the second piezoelectric material layers are opposite, the electrode layers comprise a plurality of first electrode layers and a plurality of second electrode layers, and the first electrode layers and the second electrode layers are respectively connected with an electric excitation signal of one polarity.

[0015] A cleaning module comprises a shell, an ultrasonic vibration cleaning assembly is arranged in the shell, and a sealing ring is arranged between the shell and the ultrasonic vibration cleaning assembly.

[0016] As an improvement, the end of the shell extends radially inward to form a flange.

[0017] Compared with the prior art, the advantages of the present application are:

[0018] The ultrasonic vibration cleaning assembly and the cleaning module have simple and reasonable structures, the hydrophobic layer is arranged on the outer surface of the optical lens, the adsorption of the lens surface to pollutants such as water droplets, water mist and dust is weakened, and under the assistance of the hydrophobic effect, only a small amplitude and inertial force are needed to completely remove the pollutants.

[0019] In addition, by arranging the piezoelectric transducer, the piezoelectric layers with opposite polarization directions are arranged at intervals, and under the action of electric excitation, the piezoelectric material layers of different layers simultaneously produce expansion and stretching or extrusion and contraction, so that a larger electric field strength can be generated under a smaller excitation voltage, the overall output is larger, and the driving force is larger, which is beneficial to driving the optical lens to form a larger amplitude and inertial force, and a better pollutant removal effect is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1is a sectional view of the cleaning assembly embodiment one of the utility model;

[0021] Figure 2 is Figure 1 is a structural schematic view of a multilayer piezoelectric transducer in the utility model;

[0022] Figure 3 is a sectional view of the cleaning assembly embodiment two of the utility model;

[0023] Figure 4 is a sectional view of the cleaning assembly embodiment three of the utility model;

[0024] Figure 5 is a sectional view of the cleaning assembly embodiment four of the utility model;

[0025] Figure 6 is a sectional view of the cleaning assembly embodiment five of the utility model;

[0026] Figure 7 is a structural schematic view of the cleaning module of the utility model.

[0027] The names of the various reference signs in the drawings of the utility model are as follows:

[0028] Ultrasonic vibration cleaning assembly P, optical lens 1, hydrophobic layer 1a, multilayer piezoelectric transducer 2, first piezoelectric material layer 21a, second piezoelectric material layer 21b, first electrode layer 22a, second electrode layer 22b, single-layer piezoelectric transducer 3, shell 4, baffle 41, sealing ring 5. DETAILED DESCRIPTION

[0029] The utility model will be described in further detail below in conjunction with the drawings:

[0030] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles of the utility model defined in the following description can be used in other embodiments, modification schemes, improvement schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0031] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or position indicated by the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of the simplified description of the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above-mentioned terms cannot be understood as a limitation of the utility model.

[0032] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0033] Example 1, as Figures 1-2 As shown, an ultrasonic vibration cleaning component includes an optical lens 1 and a piezoelectric transducer. The outer surface of the optical lens 1 is provided with a hydrophobic layer 1a, and the piezoelectric transducer is disposed on the inner or outer side of the optical lens 1.

[0034] The aforementioned optical lens 1 is made of various highly transparent amorphous optical glasses with silicon dioxide as the main component, such as colorless optical glass, colored optical glass, quartz optical glass, etc. It can also be a highly transparent optical crystal or organic material, such as silicone or PMMA, and can be planar or curved.

[0035] The hydrophobic layer 1a can reduce the adsorption of pollutants such as water droplets, water mist, and dust on the lens surface. With the help of the hydrophobic effect, only a small amplitude and inertial force are needed to completely remove pollutants.

[0036] The hydrophobic layer 1a can be a coating or film with hydrophobic properties. Specifically, the hydrophobic layer 1a can be a non-polar material coating, a low surface energy material coating, or a hydrophobic nanomaterial coating, and the hydrophobic layer 1a can also be a hydrophobic film.

[0037] In this embodiment, a multilayer piezoelectric transducer 2 is provided on the inner side of the optical lens 1.

[0038] The multilayer piezoelectric transducer 2 has a multilayer ring structure. The piezoelectric transducer 2 includes piezoelectric material layers and electrode layers arranged at intervals. The piezoelectric material layers include first piezoelectric material layers 21a and second piezoelectric material layers 21b arranged at intervals. The polarization directions of each first piezoelectric material layer 21a are the same, and the polarization directions of each second piezoelectric material layer 21b are the same. The polarization directions of the first piezoelectric material layers 21a and second piezoelectric material layers 21b are opposite. The electrode layers include first electrode layers 22a and second electrode layers 22b arranged at intervals. The first electrode layers 22a and second electrode layers 22b are respectively connected to an electric excitation signal.

[0039] The multilayer piezoelectric transducer 2 adopts a multilayer ring structure and adopts a structure in which layers of piezoelectric materials with opposite polarization directions are arranged at intervals. Thus, under the action of electric excitation, due to the small electrode spacing, which is often less than 0.5 mm, the piezoelectric material layers of different layers simultaneously produce expansion and stretching or extrusion and contraction. Thus, under a smaller excitation voltage, a larger electric field strength can be generated, so that the piezoelectric material as a whole can output a larger deformation and driving force, which is conducive to driving the optical lens to generate a larger amplitude and inertial force, thereby obtaining a better pollutant removal effect.

[0040] The piezoelectric transducer is a tubular structure with a central opening, and the central opening of the piezoelectric transducer is provided to ensure smoothness of the light path.

[0041] In the embodiment, as shown in the figure, the outer surface of the optical lens 1 is provided with a hydrophobic layer 1a, and piezoelectric transducers are arranged on the inner and outer sides of the optical lens 1. In this embodiment, the piezoelectric transducers on the inner and outer sides both adopt the multilayer piezoelectric transducer 2. Figure 3

[0042] The piezoelectric transducers arranged on the two sides generate tensile stress and compressive stress respectively, and jointly push the optical lens 1 to produce bending deformation. This double driving mode can generate a larger driving force, a larger amplitude and inertial force, and the required driving voltage can be reduced by several times, which is more economical.

[0043] In the embodiment, as shown in the figure, the outer surface of the optical lens 1 is provided with a hydrophobic layer 1a, and piezoelectric transducers are arranged on the inner and outer sides of the optical lens 1. In this embodiment, the piezoelectric transducers on the inner and outer sides both adopt the multilayer piezoelectric transducer 2. Figure 4

[0044] In the embodiment, as shown in the figure, the outer surface of the optical lens 1 is provided with a hydrophobic layer 1a, and piezoelectric transducers are arranged on the inner and outer sides of the optical lens 1. In this embodiment, the piezoelectric transducers on the inner and outer sides both adopt the multilayer piezoelectric transducer 2. Figure 5

[0045] In the embodiment, as shown in the figure, the outer surface of the optical lens 1 is provided with a hydrophobic layer 1a, and piezoelectric transducers are arranged on the inner and outer sides of the optical lens 1. In this embodiment, the piezoelectric transducers on the inner and outer sides both adopt the multilayer piezoelectric transducer 2. Figure 6

[0046] In the embodiment, as shown in the figure, the outer surface of the optical lens 1 is provided with a hydrophobic layer 1a, and piezoelectric transducers are arranged on the inner and outer sides of the optical lens 1. In this embodiment, the piezoelectric transducers on the inner and outer sides both adopt the multilayer piezoelectric transducer 2. Figure 7 ​​​​As shown, a cleaning module comprises a shell 4, an ultrasonic vibration cleaning assembly is arranged in the shell 4, and a sealing ring 5 is arranged between the shell 4 and the ultrasonic vibration cleaning assembly.

[0047] The end of the shell 4 extends radially inwardly and is formed with a stop edge 41.

[0048] The sealing ring 5 can prevent the shell from being dampened by external moisture, and can also reduce the conduction of the ultrasonic vibration of the cleaning assembly to the shell. The shell 4 and the ultrasonic vibration cleaning assembly P can be fixed by screwing, bonding, crimping or other fixing methods.

[0049] The cleaning module can be directly assembled on various camera modules, and when the cleaning module is installed, the light path entrance of the camera is directly covered by the cleaning module. The light path pollutants can be removed by ultrasonic vibration without affecting the transmission of the light beam, and the environmental climate and pollution resistance of the camera module is improved.

[0050] The above is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the content of the present application should be included in the protection scope of the present application.

Claims

1. An ultrasonic vibration cleaning assembly, characterized in that: The device includes an optical lens (1) and a piezoelectric transducer. The outer surface of the optical lens (1) is provided with a hydrophobic layer (1a). The piezoelectric transducer is disposed on the inner or outer side of the optical lens (1). The piezoelectric transducer is a multilayer piezoelectric transducer (2) or a single-layer piezoelectric transducer (3), and includes at least one multilayer piezoelectric transducer (2). The multilayer piezoelectric transducer (2) has a multilayer annular structure and includes spaced piezoelectric material layers and electrode layers. The piezoelectric material layers include interlayer piezoelectric material layers and electrode layers. The first piezoelectric material layer (21a) and the second piezoelectric material layer (21b) are spaced apart. The polarization direction of each first piezoelectric material layer (21a) is the same, and the polarization direction of each second piezoelectric material layer (21b) is the same. The polarization directions of the first piezoelectric material layer (21a) and the second piezoelectric material layer (21b) are opposite. The electrode layer includes a first electrode layer (22a) and a second electrode layer (22b) spaced apart. The first electrode layer (22a) and the second electrode layer (22b) are respectively connected to an electric excitation signal.

2. The ultrasonic vibration cleaning assembly according to claim 1, characterized in that: The hydrophobic layer (1a) is a non-polar material coating, a low surface energy material coating, or a hydrophobic nanomaterial coating.

3. The ultrasonic vibration cleaning assembly according to claim 1, characterized in that: The hydrophobic layer (1a) is a hydrophobic film.

4. The ultrasonic vibration cleaning assembly according to claim 1, characterized in that: The optical lens (1) is provided with piezoelectric transducers on both sides.

5. The ultrasonic vibration cleaning assembly according to claim 1, characterized in that: The piezoelectric transducer is a tubular structure with a central opening.

6. A cleaning module, characterized in that, It includes a housing (4), and the ultrasonic vibration cleaning component according to any one of claims 1 to 5 is disposed inside the housing (4), and a sealing ring (5) is disposed between the housing (4) and the ultrasonic vibration cleaning component.

7. A cleaning module according to claim 6, characterized in that: The end of the outer shell (4) extends radially inward to form a retaining edge (41).

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