Waterproof ultrasonic transducer

Abstract

The utility model discloses a waterproof ultrasonic transducer, which comprises a shell and a sealing unit, and is characterized in that the shell is provided with an accommodating cavity; the sealing unit is connected with the shell; wherein the sealing unit comprises a sealing piece and a pressing piece, the sealing piece is embedded in the containing cavity, the sealing piece is provided with a protruding part, the protruding part is arranged in the circumferential direction of the sealing piece, and when the pressing piece is in the state of being connected with the shell, the pressing piece is arranged in the circumferential direction of the sealing piece. The pressing piece extrudes the protruding part in the axial direction so that the protruding part can be compressed and deformed in the radial direction of the shell, and the protruding part extends in the radial direction of the shell to abut against the inner wall of the shell.

Description

Technical Field

[0001] The present application relates to the field of sealing technology, and more specifically, to a waterproof ultrasonic transducer. Background Art

[0002] At present, there are problems with the back-end waterproofing of ultrasonic sensors. If the working environment is underwater, then after a long period of immersion, water will enter the transducer due to the influence of water pressure, causing an internal short circuit or affecting the performance of the transducer.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] One object of the present application is to provide a new technical solution for a waterproof ultrasonic transducer.

[0005] According to one aspect of the present application, a waterproof ultrasonic transducer is provided. The waterproof ultrasonic transducer comprises a housing and a sealing unit; the housing has a receiving cavity; the sealing unit is connected to the housing; wherein the sealing unit comprises a sealing member and a pressing member, the sealing member is embedded in the receiving cavity, the sealing member has a protrusion, the protrusion is arranged along the circumferential direction of the sealing member, and when the pressing member is connected to the housing, the pressing member presses the protrusion along the axial direction so that the protrusion can be compressed and deformed along the radial direction of the housing, and extends in the radial direction of the housing until it abuts against the inner wall of the housing.

[0006] Optionally, a clamping piece is provided on the clamping piece, and the clamping piece is arranged along the circumferential direction of the clamping piece. A clamping groove is opened on the inner wall of the shell. When the clamping piece is connected to the shell, the clamping piece and the clamping groove form a limiting fit.

[0007] Optionally, the protrusion also includes an extension portion, the extension portion has a socket opened along the axial direction of the shell, the end of the wire can pass through the socket and extend into the accommodating cavity, when the clamping piece is connected to the shell, the extension portion extends out of the clamping piece, and the clamping piece squeezes the extension portion along the axial direction so that the extension portion is compressed and deformed along the radial direction, and shrinks in the radial direction of the extension portion; wherein the extension portion has a protrusion, and the protrusion is arranged along the circumferential direction of the extension portion.

[0008] Optionally, the protrusion includes a first boss, which is arranged along the circumferential direction of the seal, and when the clamping member is connected to the shell, the first boss abuts against the clamping member, and the size of the first boss along the radial direction of the shell increases.

[0009] Optionally, the protruding portion further includes a second boss, which is disposed on the sealing member, and when the pressing member is connected to the housing, the second boss abuts against the pressing member.

[0010] Optionally, an extrusion portion is provided on the second boss, the extension portion is connected to the extrusion portion, the radial dimension of the extrusion portion gradually decreases from the extension portion toward the first boss, and when the clamping member is connected to the shell, the extrusion portion abuts against the clamping member.

[0011] Optionally, the pressing member has an abutment portion, the abutment portion is arranged on a side of the pressing member close to the first boss, and the abutment portion abuts against the first boss.

[0012] Optionally, the pressing member has a through hole, and when the pressing member is connected to the housing, the pressing member presses the pressing portion against each other in the axial direction to reduce the diameter of the insertion hole.

[0013] Optionally, a piezoelectric ceramic and an adapter plate are provided in the accommodating cavity, the adapter plate is located between the sealing component and the piezoelectric ceramic, the lead of the piezoelectric ceramic is connected to the adapter plate, and one end of the wire passes through the extension portion and is connected to the adapter plate.

[0014] In the embodiment of the present application, the shell is sealed by arranging a sealing member in the receiving cavity and connecting the shell to the shell through a pressing member, which not only prevents the sealing member from falling off, but also allows the pressing member to abut against the protrusion so that the protrusion undergoes compression deformation in the radial direction. The pressing member squeezes the protrusion in the axial direction so that the protrusion extends in the radial direction of the shell and abuts against the inner wall of the shell, thereby further enhancing the sealing effect of the sealing member on the receiving cavity.

[0015] In addition, the extension part is squeezed in the radial direction by the pressing piece, so that the extension part is compressed and deformed in the radial direction, that is, the diameter of the socket is reduced by squeezing the extension part by the pressing piece, which can effectively reduce the gap between the extension part and the wire, effectively improve the sealing effect of the connection between the extension part and the wire, avoid water from flowing into the receiving cavity through the wire, and effectively extend the service life of the ultrasonic transducer.

[0016] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0018] Figure 1is a schematic diagram of the structure of an ultrasonic transducer in an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of the cross-sectional structure of an ultrasonic transducer in an embodiment of the present application;

[0020] Figure 3 is a front view of an ultrasonic transducer in an embodiment of the present application;

[0021] Figure 4 is a schematic cross-sectional structure diagram of a front view of an ultrasonic transducer in an embodiment of the present application;

[0022] Figure 5 is a schematic cross-sectional structural diagram of an ultrasonic transducer in an embodiment of the present application in an exploded state;

[0023] Figure 6 is a schematic structural diagram of an ultrasonic transducer in another embodiment of the present application;

[0024] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure of the ultrasonic transducer;

[0025] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional structure of the ultrasonic transducer in the exploded state.

[0026] Description of reference numerals:

[0027] 1-housing; 11-accommodating cavity; 111-card slot;

[0028] 2-sealing unit; 21-sealing member; 211-protruding portion; 2111-first boss; 2112-second boss; 212-extending portion; 2121-insertion hole; 213-extrusion portion; 214-protrusion; 22-pressing member; 221-abutting portion; 2211-clamping member; 222-through hole;

[0029] 3- piezoelectric ceramics;

[0030] 4-Adapter board;

[0031] 5- Wires. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] According to an embodiment of the present application, a waterproof ultrasonic transducer is provided, which includes a housing 1 and a sealing unit 2. The housing 1 has a receiving cavity 11; the sealing unit 2 is connected to the housing 1; wherein the sealing unit 2 includes a sealing member 21 and a pressing member 22, the sealing member 21 is embedded in the receiving cavity 11, the sealing member 21 has a protrusion 211, and the protrusion 211 is arranged along the circumferential direction of the sealing member 21. When the pressing member 22 is connected to the housing 1, the pressing member 22 presses the protrusion 211 along the axial direction so that the protrusion 211 undergoes elastic deformation along the radial direction of the housing 1.

[0038] like Figure 1 , Figure 2 and Figure 7 As shown, the housing 1 is a columnar structure with an opening at the top. The housing 1 has a receiving cavity 11, and the top of the receiving cavity 11 is connected to the opening. The sealing unit 2 is arranged at the opening of the housing 1, and the opening of the housing 1 is sealed by the sealing unit 2 to form a sealed receiving cavity 11 in the housing 1. The components such as electrical components are placed in the sealed receiving cavity 11, which can effectively extend the service life of the ultrasonic transducer in water.

[0039] like Figures 2 to 5 , Figures 7 and 8 As shown, the sealing unit 2 includes a sealing member 21 and a pressing member 22. The sealing member 21 is disposed in the receiving cavity 11, and the sealing member 21 can be made of elastic materials such as rubber and silicone.

[0040] The sealing member 21 is located in the receiving cavity 11 and close to the opening of the housing 1. The pressing member 22 is connected to the housing 1 to prevent the sealing member 21 from falling off from the opening and affecting the waterproof effect of the ultrasonic transducer.

[0041] like Figures 2 to 5 , Figures 7 and 8As shown, the seal 21 is a circular plate-shaped structure made of rubber. A protrusion 211 is provided at the edge of the upper surface of the seal 21, and the top view of the protrusion 211 is annular. The cross section of the protrusion 211 is semicircular. The protrusion 211 is integrally formed with the seal 21.

[0042] The diameter of the protrusion 211 is the same as the diameter of the sealing member 21. In other words, the diameter of the protrusion 211 is the same as the diameter of the receiving chamber 11. When the sealing member 21 is located in the receiving chamber 11, and the pressing member 22 is connected to the housing 1, the bottom of the pressing member 22 abuts against the top of the sealing member 21, and the bottom of the pressing member 22 is smooth, and the bottom of the pressing member 22 abuts against the protrusion 211. The pressing member 22 squeezes the protrusion 211 along the axial direction of the housing 1, that is, the pressing member 22 squeezes the protrusion 211 downward, so that the protrusion 211 is elastically deformed along the radial direction of the housing 1, so that the protrusion 211 abuts against the inner wall of the receiving chamber 11, and the receiving chamber 11 is sealed. The pressing member 22 squeezes the protrusion 211 of the sealing member 21, so that the sealing member 21 is tightly fitted with the inner wall of the housing 1, and the sealing performance of the housing 1 is effectively improved.

[0043] In the embodiment of the present application, the sealing member 21 is arranged in the receiving cavity 11 to seal the housing 1, and is connected to the housing 1 through the pressing member 22, which can not only prevent the sealing member 21 from falling off, but also the pressing member 22 can abut against the protrusion 211, so that the protrusion 211 is compressed and deformed in the radial direction, and the pressing member squeezes the protrusion in the axial direction, so that the protrusion extends in the radial direction of the housing and abuts against the inner wall of the housing, so as to further enhance the sealing effect of the sealing member 21 on the receiving cavity 11.

[0044] In addition, the extension portion 212 is compressed and deformed in the radial direction by the pressing piece 22 squeezing the extension portion 212, that is, the diameter of the insertion hole 2121 is reduced by squeezing the extension portion 212 by the pressing piece 22. This can effectively reduce the gap between the extension portion 22 and the wire 5, effectively improve the sealing effect of the connection between the extension portion 22 and the wire 5, prevent water from flowing into the accommodating cavity 11 through the wire 5, and effectively extend the service life of the ultrasonic transducer.

[0045] In one example, a clamping member 2211 is provided on the clamping member 22, and the clamping member 2211 is arranged along the circumferential direction of the clamping member 22. A clamping groove 111 is opened on the inner wall of the shell 1. When the clamping member 22 is connected to the shell 1, the clamping member 2211 and the clamping groove 111 form a limiting fit.

[0046] like Figures 2 to 5As shown, the abutment portion 221 includes a plurality of abutment blocks distributed in an annular array on the lower surface of the pressing member 22. When the housing 1 is connected to the pressing member 22, the second boss 2112 is located in the abutment portion 221.

[0047] like Figure 1 As shown, the outer wall of each abutment block is provided with a clamping piece 2211. When the housing 1 is connected to the pressing piece 22, the clamping piece 2211 is connected to the inner wall of the housing 1 by interference fit.

[0048] Of course, in the embodiment of the present application, the clamping member 2211 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the clamping member 2211 can also be set on the inner wall of the housing 1 so that the clamping member 2211 and the outer wall of the abutment portion 221 have an interference fit.

[0049] like Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the receiving cavity 11 includes a first cavity and a second cavity. The first cavity and the second cavity are arranged along the axial direction of the housing 1. That is, the first cavity is located above the second cavity.

[0050] Of course, in the embodiment of the present application, the receiving cavity 11 is not limited to the above structure, and those skilled in the art can configure it according to actual needs. For example, the first cavity can also be located below the second cavity.

[0051] The sealing member 21 is disposed in the first cavity. The sealing member 21 cooperates with the first cavity to seal the second cavity, thereby preventing water from entering the receiving cavity 11 and damaging the electrical components in the second cavity.

[0052] like Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the inner wall of the housing 1 has a clamping groove 111 arranged along the circumferential direction. The clamping groove 111 is a first cavity, so that when the seal 21 is embedded in the first cavity, the clamping member 2211 is embedded in the clamping groove 111 to form a limited fit. The clamping member 2211 is embedded in the clamping groove 111, which can not only fix the seal 21 in the first cavity, but also enhance the sealing effect between the seal 21 and the housing 1, and prevent water from entering the receiving cavity 11 through the gap between the seal 21 and the housing 1.

[0053] In an example, the diameter of the clamping member 2211 gradually decreases in an extending direction from the first cavity to the second cavity, and the shape of the clamping groove 111 is the same as that of the clamping member 2211 .

[0054] like Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the clamping member 2211 is a hollow cone structure, and the diameter of the top of the clamping member 2211 is larger than the diameter of the bottom of the clamping member 2211. The clamping member 2211 can be fixed to the outer wall of the abutment portion 221 by bonding, welding, interference fit or integral molding.

[0055] The clamping groove 111 is a groove formed on the inner wall of the housing 1. The groove is conical, that is, the diameter of the top of the groove is larger than the diameter of the bottom of the groove. The position and shape of the groove match the clamping member 2211. By setting the limiting fit of the conical structure, the housing 1 and the pressing member 22 can be effectively prevented from being separated, which would affect the sealing effect of the ultrasonic transducer.

[0056] In one example, the sealing member 21 has an extension portion 212, and the extension portion 212 has a socket 2121 opened along the axial direction of the shell 1. The end of the wire 5 can pass through the socket 2121 and extend into the accommodating cavity 11. When the clamping member 22 is connected to the shell 1, the extension portion 212 extends out of the clamping member 22, and the clamping member 22 squeezes the extension portion 212 along the axial direction so that the extension portion 212 undergoes elastic deformation along the radial direction; wherein, the extension portion 212 has a protrusion 214, and the protrusion 214 is arranged along the circumferential direction of the extension portion 212.

[0057] like Figures 2 to 5 As shown, the sealing member 21 , the first boss 2111 , the second boss 2112 and the extension portion 212 are made of an integrally formed elastic material.

[0058] like Figures 2 to 4 , Figure 7 As shown, the extension portion 212 is provided with a plug hole 2121, which is arranged along the axial direction of the housing 1, that is, the plug hole 2121 is connected to the receiving cavity 11. One end of the wire 5 extends into the receiving cavity 11 through the plug hole 2121, so that one end of the wire 5 is connected to the electrical component in the receiving cavity 11.

[0059] The top end of the extension part 212 can penetrate the pressing member 22, and one end of the wire 5 is connected to the electrical component in the receiving cavity 11 through the extension part 212. During the connection between the pressing member 22 and the housing 1, the pressing member 22 gradually moves downward so that the extension part 212 gradually extends out of the pressing member 22, and at the same time, the pressing member 22 squeezes the extension part 212 in the radial direction so that the diameter of the extension part 212 is reduced, thereby being close to the wire 5 to seal the gap between the wire 5 and the extension part 212, thereby preventing water from entering the receiving cavity 11 through the gap between the wire 5 and the extension part 212, and improving the sealing effect.

[0060] The extension part is arranged on the second boss 2112. When the pressing member 22 is connected to the housing 1, the second boss 2112 abuts against the pressing member 22, and the top end of the extension part 212 extends out of the pressing member 22. While the pressing member 22 abuts against the second boss 2112 to seal the receiving chamber 11, the pressing member 22 presses down the second boss 2112, so that the second boss 2112 and the extension part 212 move downward, squeeze the insertion hole 2121 of the extension part 212, and the diameter of the extension part 212 gradually decreases, thereby gradually reducing the diameter of the insertion hole 2121. In other words, the pressing member 22 can compress the extension part 212 and reduce the gap between the extension part 212 and the wire 5, thereby preventing water from entering the receiving chamber 11 through the insertion hole 2121 along the wire 5, affecting the sealing effect of the ultrasonic transducer.

[0061] like Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the outer wall of the extension part 212 is provided with a protrusion 214. The protrusion 214 is annular and sleeved on the extension part 212. By providing the protrusion 214 on the outer wall of the extension part 212, when the housing 1 is connected to the locking part 22, the protrusion 214 on the outer periphery of the extension part 212 is squeezed in the radial direction by the locking part 22. By providing the protrusion 214 between the extension part 212 and the locking part 22, the reduction range of the extension part 212 in the radial direction is effectively increased, which is conducive to reducing the gap between the extension part 212 and the wire 5, and improving the tightness between the sealing member 21 and the wire 5.

[0062] Of course, in the embodiment of the present application, the protrusion 214 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the protrusion 214 can also be arc-shaped, and a plurality of arc-shaped protrusions 214 are arranged along the circumference of the extension portion 212.

[0063] In one example, the protrusion 211 includes a first boss 2111, which is arranged along the circumferential direction of the seal 21. When the clamping member 22 is connected to the shell 1, the first boss 2111 abuts against the clamping member 22, and the size of the first boss 2111 along the radial direction of the shell 1 increases.

[0064] like Figures 2 to 5 , Figures 7 and 8 As shown, the first boss 2111 is annular, and the diameter of the first boss 2111 is the same as the diameter of the sealing member 21. The first boss 2111 is arranged on the top of the sealing member 21, and the first boss 2111 is arranged at the edge of the sealing member 21 to abut against the inner wall of the housing 1.

[0065] The longitudinal section of the first boss 2111 is semicircular. When the pressing member 22 is connected to the housing 1, the top of the first boss 2111 abuts against the bottom of the pressing member 22, that is, the bottom of the pressing member 22 is flat, and the top of the first boss 2111 is arc-shaped. The bottom of the pressing member 22 presses against the top of the first boss 2111, so that the first boss 2111 changes in the axial direction, that is, the size of the first boss 2111 in the axial direction becomes smaller, and the size in the radial direction increases, so that the first boss 2111 is closely fitted with the inner wall of the housing 1, and the sealing effect is enhanced.

[0066] In an example, the protruding portion 211 further includes a second boss 2112 , and the second boss 2112 is disposed on the sealing member 21 . When the pressing member 22 is connected to the housing 1 , the second boss 2112 abuts against the pressing member 22 .

[0067] like Figures 2 to 5 , Figures 7 and 8 As shown, the second boss 2112 is arranged on the top of the sealing member 21. The second boss 2112 is a columnar structure. The axial direction of the second boss 2112 is the same as the axial direction of the housing 1. The second boss 2112 and the first boss 2111 are located on the same side of the sealing member 21, that is, the first boss 2111 and the second boss 2112 are both arranged on the side of the sealing member 21 close to the pressing member 22. By arranging the first boss 2111 and the second boss 2112 on the side of the sealing member 21 close to the pressing member 22, so as to facilitate the abutment of the pressing member 22 with the first boss 2111 and the second boss 2112, the sealing effect of the ultrasonic transducer is improved.

[0068] The sealing member 21 , the first boss 2111 and the second boss 2112 are made of an integrally formed elastic material.

[0069] A conical groove is provided on the lower surface of the sealing member 21, and the diameter of the conical groove gradually decreases from the side away from the pressing member 22 to the side close to the pressing member 22. The conical groove is provided to facilitate the bending transition of the end of the wire 5 entering the receiving cavity 11, thereby avoiding poor flexibility when the wire 5 is connected to the electrical component.

[0070] In one example, an extrusion portion 213 is provided on the second boss 2112, and the extension portion 212 is connected to the extrusion portion 213. The radial dimension of the extrusion portion 213 gradually decreases from the extension portion 212 toward the first boss 2111. When the clamping member 22 is connected to the shell 1, the extrusion portion 213 abuts against the clamping member 22.

[0071] like Figures 2 to 5 , Figures 7 and 8As shown, a pressing portion 213 is provided at the top of the second boss 2112. The pressing portion 213 is conical, and the bottom of the extension portion 212 is connected to the pressing portion 213. When the pressing member 22 is connected to the housing 1, the lower surface of the pressing member 22 abuts against the pressing portion 213. When the pressing member 22 is pressed down, the extension portion 212 extends out of the pressing member 22, and the pressing member 22 moves downward to cause the elastic sealing member 21 to undergo elastic deformation in the radial direction, thereby reducing the diameter of the jack 2121, so that the extension portion 212 fits tightly with the wire 5, thereby improving the sealing effect.

[0072] In an example, the pressing member 22 has an abutting portion 221 , and the abutting portion 221 is disposed on a side of the pressing member 22 close to the first boss 2111 , and the abutting portion 221 abuts against the first boss 2111 .

[0073] like Figures 1 to 5 As shown, the abutment portion 221 includes an abutment block arranged at the bottom of the pressing member 22, and a plurality of abutment blocks are arranged in a circular array at the bottom of the pressing member 22. When the pressing member 22 is connected to the housing 1, the abutment portion 221 is embedded in the receiving cavity 11 and is located above the first boss 2111, while the second boss 2112 is located between the plurality of abutment blocks distributed in a circular array. The bottom of the abutment block abuts against the top of the first boss 2111, and one side of the plurality of abutment blocks arranged oppositely in the circular array abuts against the outer wall of the second boss 2112. Not only can the sealing member 21 be effectively fixed to prevent the sealing member 21 from falling off the receiving cavity 11, but also the elastic sealing member 21 can be squeezed so that the first boss 2111 and the second boss 2112 both move along the radial direction of the housing 1, thereby enhancing the sealing effect of the ultrasonic transducer.

[0074] Of course, in the embodiment of the present application, the abutment portion 221 is not limited to the above structure, and those skilled in the art can configure it according to actual needs. Figures 6 to 8 As shown, the abutting portion 221 may also be annular.

[0075] In one example, the pressing member 22 has a through hole 222 . When the pressing member 22 is connected to the housing 1 , the pressing member 22 presses the pressing portion 213 along the axial direction to reduce the diameter of the insertion hole 2121 .

[0076] like Figures 1 to 5 , Figures 7 and 8As shown. A through hole 222 is provided in the center of the pressing member 22 along the axial direction. The through hole 222 is used for the top of the extension 212 to extend the pressing member 22. The diameter of the through hole 222 gradually decreases from the side away from the sealing member 21 to the side close to the sealing member 21. By setting the diameter of the through hole 222 to a gradually decreasing structure, it is beneficial for the extension 212 to elastically deform in the radial direction when the extension 212 extends out of the through hole 222, so as to reduce the diameter of the through hole 222 and effectively improve the sealing between the extension 212 and the wire 5.

[0077] In one example, a piezoelectric ceramic 3 and an adapter plate 4 are provided in the accommodating cavity 11, the adapter plate 4 is located between the seal 21 and the piezoelectric ceramic 3, the lead of the piezoelectric ceramic 3 is connected to the adapter plate 4, and one end of the wire 5 passes through the extension portion 212 and is connected to the adapter plate 4.

[0078] like Figure 2 , Figure 4 , Figure 5 , Figure 7 As shown, the diameter of the first cavity is larger than the diameter of the second cavity. A step surface is formed at the connection between the first cavity and the second cavity.

[0079] The edge of the adapter plate 4 overlaps the step surface. The seal 21 is above the adapter plate 4, and the piezoelectric ceramic 3 is below the adapter plate 4. The piezoelectric ceramic 3 is bonded to the bottom of the second cavity, that is, the piezoelectric ceramic 3 is bonded inside the housing 1.

[0080] Lead wires are drawn out from the piezoelectric ceramic 3 and welded to the connecting plate, and one end of the wire 5 is connected to the connecting plate, and the other end of the wire 5 passes through the extension part 212. When the housing 1 is connected to the pressing member 22, the bottom of the abutment part 221 presses the first boss 2111 downward to strengthen the sealing effect between the sealing member 21 and the housing 1. The second boss 2112 is embedded between a plurality of abutment blocks distributed in a ring array. The top end of the extension part 212 extends out of the pressing member 22, and the pressing member 22 squeezes the extension part 212, so that the diameter of the through hole 222 of the extension part 212 is reduced, thereby preventing water from entering the receiving cavity 11 through the gap between the extension part 212 and the wire 5 and damaging the electrical components in the receiving cavity 11.

[0081] In an example, the pressing member 22 further includes a pressing plate, and the pressing plate is disposed on a side of the pressing member 22 away from the receiving cavity 11 .

[0082] like Figures 1 to 5As shown, the extrusion plate is in the shape of a circular plate. A plurality of abutment blocks distributed in a circular array are arranged at the bottom of the extrusion plate. The outer walls of the abutment blocks are all provided with clamps 2211. When the housing 1 is connected to the pressing member 22, the extrusion plate is placed on the top of the housing 1. A sealing ring can be provided between the extrusion plate and the housing 1 to further enhance the sealing effect of the ultrasonic transducer.

[0083] Of course, in the embodiment of the present application, the pressing member 22 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the pressing member 22 is a columnar structure, and the pressing member 22 is embedded in the first cavity of the housing 1. The outer wall of the pressing member 22 is provided with a clamping member 2211 arranged along the circumferential direction of the pressing member 22, and the clamping member 2211 and the clamping groove 111 on the inner wall of the housing 1 can form a limit fit.

[0084] In one example, a sealing ring is provided on the outer wall of the housing 1 .

[0085] like Figures 1 to 8 As shown, by sleeve-arranging a sealing ring on the outer wall of the housing 1, the sealing connection between the housing 1 and the external structure can be effectively strengthened, thereby improving the sealing effect of the ultrasonic transducer.

[0086] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A waterproof ultrasonic transducer, characterized in that: include: A housing (1), wherein the housing (1) has a receiving cavity (11); A sealing unit (2), the sealing unit (2) being connected to the housing (1); The sealing unit (2) comprises a sealing member (21) and a pressing member (22); the sealing member (21) is embedded in the accommodating cavity (11); the sealing member (21) has a protruding portion (211); the protruding portion (211) is arranged along the circumferential direction of the sealing member (21); when the pressing member (22) is connected to the shell (1), the pressing member (22) presses the protruding portion (211) along the axial direction so that the protruding portion (211) is compressed and deformed along the radial direction of the shell (1), and extends in the radial direction of the shell (1) until it abuts against the inner wall of the shell.

2. The waterproof ultrasonic transducer according to claim 1, characterized in that: The clamping member (22) is provided with a clamping member (2211), and the clamping member (2211) is arranged along the circumferential direction of the clamping member (22). The inner wall of the shell (1) is provided with a clamping groove (111). When the clamping member (22) is connected to the shell (1), the clamping member (2211) and the clamping groove (111) form a limiting fit.

3. The waterproof ultrasonic transducer according to claim 1, characterized in that: The sealing member (21) has an extension portion (212), the extension portion (212) has an insertion hole (2121) opened along the axial direction of the shell (1), the end of the wire (5) can pass through the insertion hole (2121) and extend into the receiving cavity (11), when the pressing member (22) is connected to the shell (1), the extension portion (212) extends out of the pressing member (22), and the pressing member (22) presses the extension portion (212) in the axial direction so that the extension portion (212) is compressed and deformed in the radial direction; The extension portion (212) has a protrusion (214), and the protrusion (214) is arranged along the circumferential direction of the extension portion (212).

4. The waterproof ultrasonic transducer according to claim 3, characterized in that: The protruding portion (211) comprises a first boss (2111), which is arranged along the circumferential direction of the sealing member (21). When the pressing member (22) is connected to the shell (1), the first boss (2111) abuts against the pressing member (22), and the size of the first boss (2111) along the radial direction of the shell (1) increases.

5. The waterproof ultrasonic transducer according to claim 4, characterized in that: The protruding portion (211) further comprises a second boss (2112), wherein the second boss (2112) is arranged on the sealing member (21), and when the pressing member (22) is connected to the housing (1), the second boss (2112) abuts against the pressing member (22).

6. The waterproof ultrasonic transducer according to claim 5, characterized in that: An extrusion portion (213) is provided on the second boss (2112), the extension portion (212) is connected to the extrusion portion (213), and the radial dimension of the extrusion portion (213) gradually decreases from the extension portion (212) toward the first boss (2111). When the clamping member (22) is connected to the shell (1), the extrusion portion (213) abuts against the clamping member (22).

7. The waterproof ultrasonic transducer according to claim 4, characterized in that: The pressing member (22) has an abutment portion (221), and the abutment portion (221) is arranged on a side of the pressing member (22) close to the first boss (2111), and the abutment portion (221) abuts against the first boss (2111).

8. The waterproof ultrasonic transducer according to claim 6, characterized in that: The pressing piece (22) has a through hole (222), and when the pressing piece (22) is connected to the housing (1), the pressing piece (22) presses the pressing portion (213) in the axial direction to reduce the diameter of the insertion hole (2121).

9. The waterproof ultrasonic transducer according to claim 8, characterized in that: A piezoelectric ceramic (3) and an adapter plate (4) are arranged in the receiving cavity (11); the adapter plate (4) is located between the sealing member (21) and the piezoelectric ceramic (3); the lead of the piezoelectric ceramic (3) is connected to the adapter plate (4); and one end of the wire (5) passes through the extension portion (212) and is connected to the adapter plate (4).

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