Vibration device and imaging device

Abstract

The utility model discloses a vibration device and a camera device, and the vibration device comprises a rear cover which is of a hollow cylindrical structure with two open ends and comprises an upper end face, a lower end face and a light through hole, and the light through hole penetrates through the upper end face and the lower end face; the piezoelectric ceramic piece is fixed on the rear cover, and the upper end part of the piezoelectric ceramic piece protrudes out of the upper end surface; the glass sheet is mounted at the upper end part of the piezoelectric ceramic piece and covers the light through hole; the front cover is provided with a receding through hole, the front cover is arranged on the edge of the glass sheet in a sleeving mode, the receding through hole is right opposite to the light through hole, the front cover is fixedly connected with the rear cover, and the front cover is used for fixing the glass sheet to the piezoelectric ceramic piece; and the elastic washer is clamped between the front cover and the glass sheet and is used for relieving the extrusion force on the glass sheet. The piezoelectric ceramic piece is adopted to vibrate the glass piece, so that rain and fog can be quickly removed without influencing the imaging quality of the camera module.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, specifically to a vibration device and a camera device. Background Technology

[0002] With the increasing automation and intelligence of automobiles, in-vehicle monitoring systems have become a standard feature in modern cars, and cameras are an indispensable component of these systems. As an essential part of in-vehicle monitoring systems, cameras are mostly installed outside the vehicle. For cameras installed outside the vehicle, rain and fog are inevitable during driving, and these conditions can affect the effectiveness of the cameras.

[0003] Current camera devices primarily remove rain and fog by heating the lens. Heating to remove rain and fog requires the lens to reach a certain temperature, resulting in slow defogging efficiency. Furthermore, the heating process causes the lens to expand, affecting the image quality. Therefore, there is an urgent need for a device that can quickly remove rain and fog without compromising the image quality of the camera module. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art. This utility model provides a vibration device, including: a rear cover, which is a hollow cylindrical structure with openings at both ends, including an upper end face, a lower end face, and a light-transmitting hole, the light-transmitting hole penetrating the upper end face and the lower end face; a piezoelectric ceramic sheet, fixed on the rear cover and with its upper end protruding from the upper end face; a glass sheet, installed on the upper end of the piezoelectric ceramic sheet and covering the light-transmitting hole; a front cover, having a clearance through hole, the front cover being sleeved on the edge of the glass sheet and the clearance through hole being directly opposite the light-transmitting hole, the front cover being fixedly connected to the rear cover, the front cover being used to fix the glass sheet on the piezoelectric ceramic sheet; and an elastic washer, sandwiched between the front cover and the glass sheet, used to relieve the compressive force on the glass sheet.

[0005] Furthermore, the piezoelectric ceramic sheet has a ring-shaped structure.

[0006] Furthermore, a first annular mounting groove is formed on the upper surface, and the piezoelectric ceramic sheet is fixed in the first mounting groove by thermally conductive adhesive.

[0007] Furthermore, the front cover has a second mounting groove at one end facing the glass sheet, and the elastic washer is disposed in the second mounting groove and protrudes from the second mounting groove.

[0008] Furthermore, the elastic washer has a circular ring structure, and the second mounting groove is circular.

[0009] Furthermore, the glass sheet is provided with an etched portion, which is bonded to the piezoelectric ceramic sheet with adhesive.

[0010] Furthermore, the front cover includes a pressure plate and a side plate. The pressure plate has the clearance through hole, and the elastic washer is sandwiched between the pressure plate and the glass sheet. The side plate is fixedly connected to the outer side wall of the rear cover.

[0011] Furthermore, a bevel is formed on the side of the pressure plate away from the glass sheet, and the bevel is connected to the clearance through hole.

[0012] Furthermore, the rear cover is provided with a mounting plate protruding from the outer side wall, and the mounting plate has threaded holes.

[0013] On the other hand, this application also provides a camera device, including: the above-mentioned vibration device and camera module; the camera module includes a lens, the lower end face of the rear cover is mounted on the camera module, and the lens is located in the light-transmitting hole. Attached Figure Description

[0014] Figure 1 Exploded view of the vibration device provided by this utility model;

[0015] Figure 2 A cross-sectional view of the assembly of the vibration device provided by this utility model;

[0016] Figure 3 A schematic diagram of the glass sheet provided by this utility model;

[0017] Figure 4 This is a schematic diagram of the assembly of the camera device provided by this utility model;

[0018] Figure 5 This is an assembly cross-sectional view of the camera device provided by this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The vibration device provided in the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, the vibration device includes a rear cover 1, a piezoelectric ceramic sheet 2, a glass sheet 3, an elastic washer 5, and a front cover 4. The piezoelectric ceramic sheet 2 is mounted on the rear cover 1, the glass sheet 3 is mounted on the piezoelectric ceramic sheet 2, and the elastic washer 5 is disposed on the glass sheet 3. The front cover 4 and the rear cover 1 cooperate to clamp and fix the piezoelectric ceramic sheet 2, the glass sheet 3, and the elastic washer 5.

[0024] Specifically, the back cover 1 includes an upper end face 11, a lower end face 12, and a light-transmitting hole 13. The light-transmitting hole 13 penetrates both the upper end face 11 and the lower end face 12, meaning its shape is a hollow cylindrical structure open at both ends. A piezoelectric ceramic sheet 2 is fixed to the back cover 1, with its upper end 21 protruding from the upper end face 11. The upper end 21 refers to the portion of the piezoelectric ceramic sheet 2 near the glass sheet 3; that is, the piezoelectric ceramic sheet 2 is mounted on the back cover 1 and partially extends beyond the upper end face 11. The upper end 21 is used to mount the glass sheet 3 and ensures that the glass sheet 3 is in contact with the upper end face 11 of the back cover 1. This ensures that the glass sheet 3 will not collide with the upper end face 11 during subsequent vibration, protecting the glass sheet 3 while ensuring that it can vibrate effectively, thereby removing rain and fog from the glass sheet 3. It should be noted that the piezoelectric ceramic sheet 2 is a sheet-like structure made of a functional material based on the piezoelectric effect. When energized, it can undergo mechanical vibration, thereby driving the glass sheet 3 mounted on it to achieve the rain and fog removal function. Because the piezoelectric ceramic sheet 2 can vibrate quickly when energized, its timely response enables rapid rain and fog removal, making it easy for the vibration device to quickly adapt to various harsh environments.

[0025] Furthermore, combined with Figure 2 and Figure 5 As shown, the glass sheet 3 is a sheet-like structure made of a light-transmitting material. The glass sheet 3 is mounted on the upper end 21 of the piezoelectric ceramic sheet 2 and covers the light-transmitting hole 13, allowing light to pass through the glass sheet 3 and enter the light-transmitting hole 13. This ensures that the lens 61 of the camera module 6, located within the light-transmitting hole 13, can collect light. The glass sheet 3's light-transmitting structure helps prevent rain and fog from falling onto the lens 61 of the camera module 6 and also avoids any impact on the light collection of the camera module 6.

[0026] For further information, please refer to [link / reference]. Figure 1 As shown, the front cover 4 has a clearance through hole 41. The front cover 4 is fitted onto the edge of the glass plate 3, and the clearance through hole 41 is directly opposite the light transmission hole 13, ensuring that light can enter the light transmission hole 13 through the clearance through hole 41. The front cover 4 also serves to fix the glass plate 3 onto the piezoelectric ceramic plate 2, ensuring close contact between the glass plate 3 and the piezoelectric ceramic plate 2, and ensuring a significant effect in removing rain and fog through vibration. The front cover 4 is fixedly connected to the rear cover 1, achieving a fixed installation of the glass plate 3 and the piezoelectric ceramic plate 2. The fixed connection between the front cover 4 and the rear cover 1 can be achieved through a threaded connection or a screw fastening, which is not limited here.

[0027] Furthermore, such as Figure 2As shown, the elastic washer 5 is sandwiched between the front cover 4 and the glass sheet 3 to relieve the compressive force on the glass sheet 3. The elastic washer 5 refers to a washer structure with elasticity. Its placement between the front cover 4 and the glass sheet 3 ensures that the glass sheet 3 vibrates synchronously under the vibration of the piezoelectric ceramic sheet 2, preventing the front cover 4 from compressing the glass sheet 3 and causing it to break. The elastic washer 5 can be a spring washer, a rubber washer, or a nylon washer.

[0028] In one embodiment, the piezoelectric ceramic sheet 2 has a ring-shaped structure. The ring-shaped structure of the piezoelectric ceramic sheet 2 ensures that the glass sheet 3 is vibrated from all sides, improving the rain and fog removal effect, and also facilitating the installation of the piezoelectric ceramic sheet 2.

[0029] In one embodiment, a first annular mounting groove 111 is formed on the upper end face 11, and the piezoelectric ceramic sheet 2 is fixed in the first mounting groove 111 by thermally conductive adhesive 112. By providing the first mounting groove 111 on the upper end face 11 of the rear shell, it is convenient to install and position the piezoelectric ceramic sheet 2. Furthermore, the piezoelectric ceramic sheet 2 is fixed in the first mounting groove 111 by the thermally conductive adhesive 112, that is, the piezoelectric ceramic sheet 2 and the rear shell are fixed by the thermally conductive adhesive 112, ensuring a stable connection between the two and allowing the thermally conductive adhesive 112 to dissipate the heat generated by the piezoelectric ceramic sheet 2 through the rear cover 1, preventing localized overheating of the vibration device. Preferably, as shown... Figure 2 As shown, a groove is further provided at the bottom of the first mounting groove 111 to form the first mounting groove 111. The groove facilitates the installation and positioning of the piezoelectric ceramic sheet 2, ensuring the stable installation of the piezoelectric ceramic sheet 2; it also helps to reduce the amount of thermally conductive adhesive 112 used and reduce the cost of the vibration device.

[0030] In one embodiment, a second mounting groove 42 is provided at the end of the front cover 4 facing the glass sheet 3, and an elastic washer 5 is disposed in the second mounting groove 42 and protrudes from the second mounting groove 42. Considering that the elastic washer 5 is sandwiched between the front cover 4 and the glass sheet 3, the second mounting groove 42 is provided on the front cover 4 to facilitate the positioning and installation of the elastic washer 5, and to prevent the elastic washer 5 from being misaligned during the assembly process, which would affect the yield rate.

[0031] In one embodiment, the elastic washer 5 has a ring-shaped structure, and the second mounting groove 42 is also ring-shaped. The use of a ring-shaped, integrated elastic washer 5 reduces the difficulty of installing the elastic washer 5, and the corresponding second mounting groove 42 is ring-shaped, facilitating the installation of the elastic washer 5.

[0032] In one embodiment, such as Figure 3As shown, an etching section 31 is provided on the glass plate 3, and the etching section 31 is bonded to the piezoelectric ceramic sheet 2 with adhesive. The etching section 31 refers to a portion of the surface of the glass plate 3 treated by chemical or physical methods to give the surface of that area a certain roughness, which facilitates the bonding and fixation of the glass plate 3 and the piezoelectric ceramic sheet 2, ensuring a stable connection between the two. The physical method can be light sandblasting, while the chemical method can be a dissolution treatment using an etching solution.

[0033] In one embodiment, such as Figure 2 As shown, the front cover 4 includes a pressure plate 43 and a side plate 44. The pressure plate 43 has a clearance through hole 41. An elastic washer 5 is sandwiched between the pressure plate 43 and the glass sheet 3. The side plate 44 is fixedly connected to the outer wall 14 of the rear cover 1. The pressure plate 43 tightly presses the elastic washer 5 onto the glass sheet 3 to prevent misalignment. The side plate 44 is fixedly connected to the outer wall 14 of the rear cover 1 via a threaded connection or screws. When using screws, screw holes are made in the side plate 44, and screws are passed through these holes to abut against the outer wall 14, thus achieving a fixed connection between the front cover 4 and the rear cover 1.

[0034] In one embodiment, a slope 431 is provided on the side of the pressure plate 43 away from the glass sheet 3, and the slope 431 is connected to the clearance through hole 41. The slope 431 is provided to facilitate the flow of rain and fog vibrated from the surface of the glass sheet 3 out of the pressure plate 43, and to prevent the rain and fog from accumulating and affecting the rain and fog removal effect of the vibration device.

[0035] In one embodiment, a mounting plate 15 protruding from the outer sidewall 14 is provided on the rear cover 1, and a threaded hole 151 is provided on the mounting plate 15. Considering that the vibration device is an integrated structure and to ensure that the vibration device can be installed on various camera modules 6, by providing a mounting plate 15 on the rear cover 1 of the vibration device and by providing a threaded hole 151 on the mounting plate 15, the vibration device can be fixed to the camera module 6 by screws, thus simplifying the installation difficulty of the vibration device.

[0036] On the other hand, such as Figure 4 and Figure 5 As shown, this application also provides a camera device, including the aforementioned vibration device and camera module 6. The camera module 6 includes a lens 61, the lower end face 12 of the rear cover 1 of the vibration device is mounted on the camera module 6, and the lens 61 is located in the light-transmitting hole 13, ensuring that the lens 61 can receive light passing through the glass plate 3, and the vibration device can effectively prevent the camera module 6 from being interfered with by rain and fog.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A vibration device, characterized in that, include: The back cover is a hollow cylindrical structure with openings at both ends, including an upper end face, a lower end face, and a light-transmitting hole, wherein the light-transmitting hole penetrates the upper end face and the lower end face; A piezoelectric ceramic sheet is fixed to the rear cover and its upper end protrudes from the upper end face; A glass plate is mounted on the upper end of the piezoelectric ceramic sheet and covers the light-transmitting hole; The front cover has a clearance through hole, the front cover is sleeved on the edge of the glass sheet and the clearance through hole is directly opposite the light-transmitting hole, and the front cover is fixedly connected to the rear cover; An elastic washer, sandwiched between the front cover and the glass sheet, is used to relieve the compressive force on the glass sheet.

2. The vibration device according to claim 1, characterized in that, The piezoelectric ceramic sheet has a ring-shaped structure.

3. The vibration device according to claim 2, characterized in that, A first annular mounting groove is provided on the upper surface, and the piezoelectric ceramic sheet is fixed in the first mounting groove by thermally conductive adhesive.

4. The vibration device according to claim 1, characterized in that, The front cover has a second mounting groove at one end facing the glass sheet, and the elastic washer is disposed in the second mounting groove and protrudes from the second mounting groove.

5. The vibration device according to claim 4, characterized in that, The elastic washer has a circular structure, and the second mounting groove is circular.

6. The vibration device according to claim 1, characterized in that, The glass sheet has an etched portion, which is bonded to the piezoelectric ceramic sheet with adhesive.

7. The vibration device according to claim 1, characterized in that, The front cover includes a pressure plate and a side plate. The pressure plate has the clearance through hole, and the elastic washer is sandwiched between the pressure plate and the glass sheet. The side plate is fixedly connected to the outer side wall of the rear cover.

8. The vibration device according to claim 7, characterized in that, The pressure plate has an inclined surface on the side away from the glass sheet, and the inclined surface is connected to the clearance through hole.

9. The vibration device according to claim 7, characterized in that, The rear cover is provided with a mounting plate that protrudes from the outer side wall, and the mounting plate has threaded holes.

10. A camera device, characterized in that, include: The vibration device and camera module as described in any one of claims 1-9, wherein the camera module includes a lens, the lower end face of the rear cover is mounted on the camera module, and the lens is located within the light-transmitting hole.

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