Vibration demisting and dedusting camera

Abstract

The utility model relates to the technical field of cameras, and provides a vibration demisting and dedusting camera, which comprises a window sheet, a vibration piezoelectric ceramic piece and a deformable pressing piece, and the window sheet is fixed between the piezoelectric ceramic piece and the pressing piece. According to the utility model, high-frequency vibration is generated through the piezoelectric ceramic piece, fog and dust on the window can be vibrated off, the piezoelectric ceramic piece is lower in power consumption compared with a traditional heating ring, the window can be demisted and dedusted in the infrared camera, and the power consumption of the whole infrared camera can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, in particular to a camera with vibration defogging and dust removal. Background Art

[0002] In order to protect the lens, an infrared camera will add a germanium or silicon wafer in front of the lens as a window. In order to prevent fogging on the outer surface of the window, a heating ring is usually attached to the back of the window to heat the window for defogging. There is a thermistor on the heating ring. When the thermistor senses that the window temperature is lower than 2°C, it starts heating and stops heating when it is higher than 7°C. However, the existing heating ring is electrically driven and heated by FPC, which has high power consumption, and the heating ring can only be a defogging structure, not dust removal. Utility Model Content

[0003] The purpose of the utility model is to provide a camera with vibration defogging and dust removal, which can at least solve some defects in the prior art.

[0004] To achieve the above-mentioned objectives, an embodiment of the utility model provides the following technical solutions: a vibrating defogger and dust removal camera, comprising a window, a sealing ring, a vibrating piezoelectric ceramic part and a deformable pressing part, the window being fixed between the piezoelectric ceramic part and the pressing part, the sealing ring being arranged between the piezoelectric ceramic part and the pressing part, the sealing ring being provided with a first groove facing the pressing part, the pressing part being provided with a first protrusion corresponding to the first groove, the protrusion being sealed into the first groove, the pressing part being provided with a second groove facing the sealing ring, the sealing ring being provided with a second protrusion corresponding to the second groove, the second protrusion being sealed into the second groove.

[0005] Furthermore, the piezoelectric ceramic component is provided with an annular resting platform, the outer periphery of the first surface of the window piece is resting on the resting platform, the piezoelectric ceramic component is provided with a light-transmitting opening corresponding to the window piece, the diameter of the light-transmitting opening is smaller than the outer diameter of the window piece, the surface of the pressing member opposite to the resting platform is pressed against the second surface of the window piece, and the first surface and the second surface are opposite to each other.

[0006] Furthermore, it also includes a bracket, which is used to support and fix the piezoelectric ceramic component and the pressing component.

[0007] Furthermore, a support platform is provided in the annular cavity of the bracket, and the support platform is in contact with the surface of the piezoelectric ceramic component facing away from the placing platform, and is used to support the piezoelectric ceramic component.

[0008] Furthermore, the piezoelectric ceramic component includes a piezoelectric ceramic sheet, a positive electrode sheet and a negative electrode sheet, the positive electrode sheet and the negative electrode sheet are both connected to the piezoelectric ceramic sheet, and the support platform is provided with openings for the positive electrode sheet and the negative electrode sheet to pass through.

[0009] Furthermore, the camera also includes a circuit board, and the positive electrode sheet and the negative electrode sheet extend out of the bracket away from the side of the window sheet and are electrically connected to the circuit board.

[0010] Furthermore, an outer wall of the pressing piece is provided with an external thread, an annular cavity of the bracket is provided with an internal thread corresponding to the external thread, and the pressing piece and the bracket are threadably connected via the internal thread and the external thread.

[0011] Furthermore, the sealing ring is arranged between the window piece and the bracket.

[0012] Compared with the prior art, the beneficial effects of the utility model are: high-frequency vibrations are generated by piezoelectric ceramic parts, so mist and dust on the window can be shaken off, and the piezoelectric ceramic parts have lower power consumption than traditional heating rings, so they can play the role of defogging and dust removal on the window pieces in infrared cameras, and can also effectively reduce the power consumption of the entire infrared camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 An exploded schematic diagram of a vibration defogging and dust removal camera provided by an embodiment of the utility model;

[0014] Figure 2 A cross-sectional schematic diagram of a vibration defogging and dust removal camera provided in an embodiment of the utility model;

[0015] Figure 3 for Figure 2 The enlarged view of the dotted circle;

[0016] In the accompanying drawings, 1-piezoelectric ceramic sheet; 10-resting platform; 2-pressing piece; 3-negative electrode sheet; 4-positive electrode sheet; 5-window sheet; 6-bracket; 60-inner cavity; 7-sealing ring; 80-first groove; 81-second groove; 82-first protrusion; 83-second protrusion. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 and Figure 2 The embodiment of the utility model provides a camera with vibration defogging and dust removal, including a window 5, a vibrating piezoelectric ceramic part and a deformable pressing part 2, wherein the window 5 is fixed between the piezoelectric ceramic part and the pressing part 2. In the present embodiment, the piezoelectric ceramic part will deform along the optical axis direction of the camera when receiving sinusoidal alternating current. When the window 5 is placed on the piezoelectric ceramic part, the pressing part 2 is pressed on the window 5, which can fix the window 5. When the piezoelectric ceramic part vibrates at a high frequency, it can vibrate with the window 5 thereon, and since the pressing part 2 itself has a certain deformation ability, for example, plastic or rubber is used, as long as it can produce a certain deformation, it will not hinder the vibration of the window 5. The mist and dust on the window 5 can be shaken off by high-frequency vibration to achieve defogging and dust removal. Preferably, the window 5 is a germanium window.

[0019] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 and Figure 2 The piezoelectric ceramic member is provided with an annular placing platform 10, the outer periphery of the first surface of the window sheet 5 is placed on the placing platform 10, the piezoelectric ceramic member is provided with a light-transmitting opening corresponding to the window sheet 5, the diameter of the light-transmitting opening is smaller than the outer diameter of the window sheet 5, the surface of the pressing member 2 opposite to the placing platform 10 is pressed against the second surface of the window sheet 5, and the first surface and the second surface are opposite. The placing platform 10 is formed on the piezoelectric ceramic member, the window sheet 5 can be placed on the placing platform 10, and the infrared light is emitted from the light-transmitting opening through the window sheet 5.

[0020] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 and Figure 2 The camera head further comprises a bracket 6, which is used to support and fix the piezoelectric ceramic component and the pressing component 2. Preferably, a support platform is provided in the annular cavity 60 of the bracket 6, and the support platform is in contact with the surface of the piezoelectric ceramic component away from the placing platform, and is used to support the piezoelectric ceramic component. A support platform is provided in the bracket 6 to support the piezoelectric ceramic component.

[0021] For details on the above mentioned piezoelectric ceramics, please refer to Figure 1 and Figure 2 , which includes a piezoelectric ceramic sheet 1, a positive electrode sheet 3 and a negative electrode sheet 4, wherein the positive electrode sheet 3 and the negative electrode sheet 4 are both connected to the piezoelectric ceramic sheet 1, and the support platform is provided with an opening for the positive electrode sheet 3 and the negative electrode sheet 4 to pass through. The negative electrode sheet 3 and the positive electrode sheet 4 are respectively connected to the front and back sides of the piezoelectric ceramic sheet 1. The piezoelectric ceramic sheet 1 can be powered by the negative electrode sheet 3 and the positive electrode sheet 4, such as Figure 1 As shown, the negative electrode sheet 3 extends to the positive electrode on the upper surface of the piezoelectric ceramic sheet 1 , and the positive electrode sheet 4 is connected to the lower surface of the piezoelectric ceramic sheet 1 .

[0022] To further optimize the above technical solution, please refer to Figure 1 and Figure 2 , the camera also includes a circuit board, the positive electrode sheet 3 and the negative electrode sheet 4 extend out of the bracket 6 away from the side of the window sheet 5, and are electrically connected to the circuit board. In this embodiment, the PCBA board of the infrared camera supplies electricity to the piezoelectric ceramic sheet 1 through the electrodes. The PCBA board can be an existing circuit board, and this embodiment does not make any improvements to it. The existing PCBA board is directly used, and only the power supply circuit needs to be designed on the PCBA board, which effectively controls the cost.

[0023] For details of the above-mentioned pressing member 2, please refer to Figure 1 and Figure 2 The outer wall of the pressing member 2 is provided with an external thread, and the annular cavity of the bracket 6 is provided with an internal thread corresponding to the external thread, and the pressing member 2 and the bracket 6 are threadedly connected through the internal thread and the external thread. The pressing member 2 can be used to press on the window sheet 5. If the above-mentioned window sheet 5 is circular, the contact part between the pressing member 2 and the window sheet 5 can also be designed to be a corresponding circle. If the window sheet 5 is square, the pressing member 2 can also be designed to match. The pressing member 2 can be fixed on the bracket 6 to fix the window sheet 5, and can be connected by threaded connection.

[0024] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 and Figure 3 The infrared camera also includes a sealing ring 7, which is arranged between the piezoelectric ceramic piece and the pressing piece 2, and between the window piece 5 and the bracket 6. In this embodiment, the sealing ring 7 is used to achieve the airtightness requirement of the infrared camera. The sealing ring 7 and the window piece 5 are both arranged on the placing platform 10 of the piezoelectric ceramic piece 1, and then are pressed and fixed by the pressing piece 2. Figure 3 As shown, the sealing ring 7 is interference fit with the pressing piece 2, the window piece 5 and the bracket 6, and the sealing ring 7 has a compression amount at the pressing piece 2, the window piece 5 and the bracket 6. In the cross-sectional view of the extruded part, it can be seen that some lines of the sealing ring 7 and the pressing piece 2 overlap, some lines of the sealing ring 7 and the window piece 5 overlap, and some lines of the sealing ring 7 and the bracket 6 overlap.

[0025] For details of the above-mentioned sealing ring 7, please refer to Figure 1 , Figure 2 and Figure 3 The sealing ring 7 is provided with a first groove 80 facing the pressing member 2 , and the pressing member 2 is provided with a first protrusion 82 corresponding to the first groove 80 , and the first protrusion 82 is sealed into the first groove 80 .

[0026] For details of the above-mentioned pressing member 2, please refer to Figure 1 , Figure 2 and Figure 3 The pressing member 2 is further provided with a second groove 81 facing the sealing ring 7 , and the sealing ring 7 is provided with a second protrusion 83 corresponding to the second groove 81 , and the second protrusion 83 is sealed into the second groove 81 .

[0027] To further refine the above-mentioned sealing ring 7, please refer to Figure 1 and Figure 2 The sealing ring 7 is a rubber ring, the piezoelectric ceramic sheet 1 is annular, and the sealing ring 7 is arranged on the annular end surface of the annular piezoelectric ceramic sheet 1. When the piezoelectric ceramic sheet 1 is designed to be annular, the sealing ring 7 is also an annular structure. In addition to using rubber material, the sealing ring 7 can also be made of other existing sealing materials, which is not limited in this embodiment.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration defogging and dust removal camera, characterized in that: It includes a window piece, a sealing ring, a vibrating piezoelectric ceramic part and a deformable pressing part, the window piece is fixed between the piezoelectric ceramic part and the pressing part, the sealing ring is arranged between the piezoelectric ceramic part and the pressing part, the sealing ring is provided with a first groove facing the pressing part, the pressing part is provided with a first protrusion corresponding to the first groove, the protrusion is sealed into the first groove, the pressing part is provided with a second groove facing the sealing ring, the sealing ring is provided with a second protrusion corresponding to the second groove, and the second protrusion is sealed into the second groove.

2. A vibration defogging and dust removal camera as claimed in claim 1, characterized in that: The piezoelectric ceramic component is provided with an annular resting platform, the outer periphery of the first surface of the window piece is resting on the resting platform, the piezoelectric ceramic component is provided with a light-transmitting opening corresponding to the window piece, the diameter of the light-transmitting opening is smaller than the outer diameter of the window piece, the surface of the pressing member opposite to the resting platform is pressed against the second surface of the window piece, and the first surface and the second surface are opposite to each other.

3. A vibration defogging and dust removal camera as claimed in claim 2, characterized in that: It also includes a bracket, which is used to support and fix the piezoelectric ceramic component and the pressing component.

4. A vibration defogging and dust removal camera as claimed in claim 3, characterized in that: A support platform is provided in the annular cavity of the bracket. The support platform is in contact with the surface of the piezoelectric ceramic component facing away from the placing platform and is used to support the piezoelectric ceramic component.

5. A vibration defogging and dust removal camera as claimed in claim 4, characterized in that: The piezoelectric ceramic component comprises a piezoelectric ceramic sheet, a positive electrode sheet and a negative electrode sheet. The positive electrode sheet and the negative electrode sheet are both connected to the piezoelectric ceramic sheet. The support platform is provided with openings for the positive electrode sheet and the negative electrode sheet to pass through.

6. A vibration defogging and dust removal camera as claimed in claim 5, characterized in that: The camera also includes a circuit board. The positive electrode sheet and the negative electrode sheet extend out of the bracket away from a side of the window sheet and are electrically connected to the circuit board.

7. A vibration defogging and dust removal camera as claimed in claim 3, characterized in that: An external thread is arranged on the outer wall of the pressing piece, an internal thread corresponding to the external thread is arranged in the annular cavity of the bracket, and the pressing piece is threadably connected to the bracket via the internal thread and the external thread.

8. A vibration defogging and dust removal camera as claimed in claim 3, characterized in that: The sealing ring is arranged between the window sheet and the bracket.

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