Ultrasonic transducer

Abstract

The utility model discloses an ultrasonic transducer. The ultrasonic transducer comprises a shell and a sealing assembly, the shell is provided with an accommodating cavity; the sealing assembly comprises a sealing piece and a locking part, the sealing piece is arranged in the containing cavity, and the locking part can be connected with the shell; in the state that the locking part is connected with the shell, the two opposite sides of the sealing piece abut against the locking part and the shell correspondingly, the locking part and the shell extrude the sealing piece in the axial direction, the sealing piece is subjected to compression deformation in the radial direction, and therefore the sealing piece can be locked. And the locking part extends in the radial direction of the shell to abut against the inner walls of the shell and the locking part.

Description

Technical Field

[0001] This application relates to the field of sealing technology, and more particularly, to an ultrasonic transducer. Background Art

[0002] At present, there are problems with the waterproofing of the back end of ultrasonic sensors. If the working environment is underwater, after being soaked for a long time, water will enter the transducer due to the influence of water pressure, causing internal short circuits or affecting the performance of the transducer.

[0003] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the Utility Model

[0004] One object of this application is to provide a new technical solution for an ultrasonic transducer.

[0005] According to one aspect of this application, an ultrasonic transducer is provided. The ultrasonic transducer includes a housing and a sealing assembly; the housing has a receiving cavity; the sealing assembly includes a sealing member and a locking portion, the sealing member is disposed in the receiving cavity, and the locking portion can be connected to the housing; in a state where the locking portion is connected to the housing, opposite sides of the sealing member respectively abut against the locking portion and the housing, the locking portion and the housing axially squeeze the sealing member, the sealing member undergoes a compressive deformation in the radial direction, and extends radially in the housing to abut against the inner walls of the housing and the locking portion.

[0006] Optionally, the locking portion includes a fastening member, the housing has a card slot, and in a state where the locking portion is connected to the housing, the fastening member is embedded in the card slot.

[0007] Optionally, the locking portion further includes a bent portion, the bent portion is disposed on the locking portion, the fastening member is circumferentially disposed on the bent portion, and the bent portion abuts against the housing in the radial direction.

[0008] Optionally, the fastening member is disposed on a side of the bent portion close to the axis, and in a state where the locking portion is connected to the housing, the bent portion and the housing axially squeeze the fastening member in the radial direction.

[0009] Optionally, the sealing member has a recessed portion, and a first protrusion is provided on a side of the locking portion close to the sealing member. In a state where the locking portion is connected to the housing, the first protrusion is embedded in the recessed portion, and the first protrusion and the recessed portion form a limiting fit. The locking portion axially squeezes the sealing member to cause the sealing member to undergo a compressive deformation in the radial direction, and the sealing member extends to abut against the first protrusion.

[0010] Optionally, one side of the seal away from the first protrusion has a fitting portion. In a state where the locking portion is connected to the housing, the fitting portion abuts against the housing. The locking portion axially presses the seal to cause the fitting portion to undergo compressive deformation in the radial direction and extend radially in the housing to abut against the housing.

[0011] Optionally, the seal has an extension portion disposed along the axial direction of the housing. A wire can pass through the extension portion and extend into the accommodation cavity. In a state where the locking portion is connected to the housing, the locking portion axially presses the extension portion to cause the extension portion to undergo compressive deformation in the radial direction and contract radially in the housing to abut against the wire; wherein, the extension portion has a second protrusion disposed along the circumferential direction of the extension portion.

[0012] Optionally, the accommodation cavity includes a first cavity and a second cavity. The diameter dimension of the first cavity is larger than that of the second cavity. The seal is disposed in the first cavity.

[0013] Optionally, a transfer board is disposed in the first cavity, and a voltage ceramic is disposed in the second cavity. The transfer board is located between the seal and the voltage ceramic. One end of the wire passes through the extension portion and the seal and is connected to the transfer board.

[0014] Optionally, the sealing assembly further includes a sealing ring sleeved on the housing.

[0015] In the embodiment of the present application, by disposing the seal between the locking portion and the housing, in a state where the locking portion is connected to the housing, the locking portion and the housing axially press the seal, which can not only prevent the seal from falling off and strengthen the sealing performance between the seal and the housing, but also cause the seal to undergo compressive deformation in the radial direction through the abutment of the locking portion and the housing. Through the extrusion deformation, the seal undergoes radial extension, so that the seal closely fits with the inner walls of the locking portion and the housing, further strengthening the sealing effect of the seal on the accommodation cavity.

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

[0017] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application.

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

[0019] Figure 2 It is a schematic diagram of the exploded state structure of the ultrasonic transducer in the embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of another angle of the exploded state of the ultrasonic transducer in the embodiment of the present application;

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

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

[0023] Figure 6 It is a schematic diagram of the exploded state structure of the housing and the sealing unit of the ultrasonic transducer in the embodiment of the present application.

[0024] Description of the reference numerals:

[0025] 1 - Housing; 11 - Accommodating cavity; 111 - First cavity; 112 - Second cavity; 12 - Card slot;

[0026] 2 - Sealing assembly; 21 - Sealing member; 211 - Depressed part; 212 - Fitting part; 213 - Extension part; 214 - Second protrusion; 22 - Locking part; 221 - Buckling part; 222 - Bent part; 223 - First protrusion; 23 - Sealing ring;

[0027] 3 - Lead wire;

[0028] 4 - Adapter board;

[0029] 5 - Voltage ceramic. Detailed implementation manners

[0030] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present application and its application or use.

[0032] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the specification.

[0033] In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0034] 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.

[0035] According to an embodiment of the present application, an ultrasonic transducer is provided. The ultrasonic transducer includes a housing 1 and a sealing assembly 2; the housing 1 has a housing cavity 11; the sealing assembly 2 includes a sealing member 21 and a locking portion 22, the sealing member 21 is arranged in the housing cavity 11, and the locking portion 22 can be connected to the housing 1; when the locking portion 22 is connected to the housing 1, the opposite sides of the sealing member 21 abut against the locking portion 22 and the housing 1 respectively, the locking portion 22 and the housing 1 squeeze the sealing member 21 in the axial direction, the sealing member 21 undergoes radial compression deformation, and extends in the radial direction of the housing 1 until it abuts against the inner wall of the housing 1 and the locking portion 22.

[0036] like Figures 1 to 6 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 of the housing 1. The housing 1 can be made of materials such as plastic.

[0037] The sealing component 2 is arranged at the opening of the shell 1. The opening of the shell 1 is sealed by the sealing component 2 to form a sealed accommodating cavity 11 in the shell 1. Electrical components and other parts are placed in the sealed accommodating cavity 11, which can effectively extend the service life of the ultrasonic transducer in water.

[0038] The locking portion 22 can be connected to the shell 1. By connecting the locking portion 22 to the shell 1, not only can the position of the seal 21 in the axial direction of the shell 1 be limited to prevent the seal 21 from falling off, but the locking portion 22 can also be connected to the shell 1 to squeeze the seal 21 along the axial direction of the shell 1, so that the seal 21 extends along the radial direction of the shell 1, so that the seal 21 is more tightly abutted against the locking portion 22 and the inner wall of the shell 1, further enhancing the sealing effect of the seal 21 on the accommodating chamber 11.

[0039] like Figures 2 to 6 As shown, the sealing member 21 is a circular plate-shaped structure. A recessed portion 211 is provided on the upper surface of the sealing member 21 , and an engaging portion 212 is provided on the side of the sealing member 21 away from the recessed portion 211 . The engaging portion 212 is embedded in the accommodating cavity 11 .

[0040] The seal 21 is connected to the receiving cavity 11. The seal 21 can be made of elastic materials such as rubber and silica gel. By using the elastic seal 21, the fitting portion 212 of the seal 21 can be in interference fit with the housing 1. The fitting portion 212 of the seal 21 undergoes compressive deformation along the radial direction of the housing 1, causing the fitting portion 212 to contract along the radial direction, so that the fitting portion 212 is closely attached to the inner wall of the housing 1 to seal the receiving cavity 11 of the housing 1.

[0041] The seal 21 is located within the receiving cavity 11 and near the opening of the housing 1. The locking portion 22 is connected to the housing 1, which can prevent the seal 21 from falling off from the opening and affecting the waterproof effect of the ultrasonic transducer.

[0042] In the embodiment of the present application, by disposing the seal 21 between the locking portion 22 and the housing 1, in the state where the locking portion 22 is connected to the housing 1, the locking portion 22 and the housing 1 squeeze the seal 21 in the axial direction. This can not only prevent the seal 21 from falling off and strengthen the sealing performance between the seal 21 and the housing 1, but also cause the seal 21 to undergo compressive deformation in the radial direction through the abutment of the locking portion 22 and the housing 1. Through the extrusion deformation, the seal 21 undergoes radial extension, so that the seal 21 is closely attached to the inner walls of the locking portion 22 and the housing 1, further strengthening the sealing effect of the seal 21 on the receiving cavity 11.

[0043] In addition, in the state where the locking portion 22 is connected to the housing 1, by squeezing the seal 21 in the axial direction between the locking portion 22 and the housing 1, the seal 21 undergoes compressive deformation in the radial direction. One end of the wire 3 passes through the seal 21 and extends into the receiving cavity 11. The compressive deformation of the seal 21 in the radial direction is conducive to improving the sealing effect of the connection between the seal 21 and the wire 3, preventing water from flowing into the receiving cavity 11 through the wire 3, and effectively extending the service life of the ultrasonic transducer.

[0044] In one example, the locking portion 22 includes a fastening member 221, and the housing 1 has a card slot 12. In the state where the locking portion 22 is connected to the housing 1, the fastening member 221 is embedded in the card slot 12.

[0045] As Figures 2 to 6 shown, the fastening member 221 is a tapered card member provided on the cross-section of the locking portion 22. The tapered card member is provided on the inner wall of the locking portion 22. A card slot 12 is provided on the outer wall of the housing 1. The card slot 12 corresponds to the position of the tapered card member. And the shape and size of the card slot 12 are the same as those of the tapered card member.

[0046] In the state where the locking part 22 is connected to the housing 1, the inner wall of the locking part 22 abuts against the outer wall of the housing 1, and the fastening part 221 is embedded in the card slot 12. The position of the fastening part 221 is defined by the card slot 12, thereby connecting the locking part 22 and the housing 1.

[0047] A limit fit is formed between the fastening part 221 and the card slot 12 to define the positions of the locking part 22 and the housing 1 in the axial direction, which is beneficial for the locking part 22 and the housing 1 to compress the sealing member 21 in the axial direction. This can not only prevent the sealing member 21 from falling off, but also cause the sealing member 21 to extend in the radial direction due to the axial extrusion of the locking part 22 and the housing 1 on the sealing member 21, effectively enhancing the sealing effect of the sealing member 21 on the container.

[0048] Of course, in the embodiment of the present application, the fastening part 221 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the fastening part 221 includes a clamping block and a buckle. The clamping block is arranged on the outer wall of the housing 1, and the buckle is arranged on the outer wall of the locking part 22. In the state where the locking part is connected to the housing 1, the buckle is sleeved on the clamping block. Or, the clamping block can also be arranged on the outer wall of the locking part 22. Correspondingly, the buckle is arranged on the outer wall of the housing 1. Or, the locking part 22 and the housing 1 can adopt a threaded connection method to realize the axial extrusion of the locking part 22 and the housing 1 on the sealing member 21.

[0049] In an example, the locking part 22 further includes a bending part 222. The bending part 222 is arranged on the locking part 22. The fastening part 221 is arranged along the circumferential direction on the bending part 222, and the bending part 222 abuts against the housing 1 in the radial direction.

[0050] As Figures 2 to 6 shown, the locking part 22 is in the shape of a circular plate, and the bending part 222 is in the shape of a ring. The outer diameter dimension of the bending part 222 is the same as the diameter dimension of the locking part 22. The top of the bending part 222 and the bottom of the locking part 22 are connected by bonding, welding or integral molding.

[0051] In the state where the locking part 22 is connected to the housing 1, the bending part 222 is sleeved on the housing 1, and the inner wall of the bending part 222 abuts against the outer wall of the housing 1.

[0052] By providing the bending part 222, it is not only convenient for the installation or disassembly of the locking part 22 and the housing 1, but also can extend the path distance of water entering the accommodation cavity 11 through the bending part 222. By arranging a sealing ring 23 or a gasket on the inner wall of the bending part 222 or the outer wall of the housing 1, the sealing effect of the ultrasonic transducer can be effectively improved.

[0053] The fastening member 221 can be arranged on the outer wall of the bending part 222, and a lock catch matching the fastening member is arranged on the outer wall of the housing 1. The fastening member 221 is connected to the lock catch to realize the detachable connection between the locking part 22 and the housing 1. The bending part 222 is sleeved on the outside of the housing 1.

[0054] By making the bending part 222 abut against the housing 1 in the radial direction, the gap between the bending part 222 and the housing 1 is reduced, and water is prevented from entering the accommodation cavity 11 through the gap between the bending part 222 and the housing 1. Moreover, by arranging the bending part 222, the distance for water to enter the accommodation cavity 11 through the gap between the bending part 222 and the housing 1 is effectively extended, further strengthening the sealing performance of the ultrasonic transducer.

[0055] In one example, the fastening member 221 is arranged on the side of the bending part 222 close to the axis. In the state where the locking part 22 is connected to the housing 1, the bending part 222 and the housing 1 squeeze the fastening member 221 in the radial direction.

[0056] As Figures 2 to 6 shown, the locking part 22 is in the shape of a circular plate, and the bending part 222 is in the shape of a ring. The outer diameter dimension of the bending part 222 is the same as the diameter dimension of the locking part 22. The top of the bending part 222 and the bottom of the locking part 22 are connected by bonding, welding or integral molding.

[0057] The fastening member 221 is a conical protrusion arranged on the inner wall of the bending part 222, and a clamping groove 12 corresponding to the conical protrusion is arranged on the outer wall of the housing 1. In the state where the locking part 22 is connected to the housing 1, the inner wall of the bending part 222 abuts against the outer wall of the housing 1, and the fastening member 221 is embedded in the clamping groove 12. The locking part 22 and the housing 1 are connected through the clamping groove 12 to limit the position of the locking part 22 and the housing 1 in the axial direction. Furthermore, the locking part 22 and the housing 1 can squeeze the sealing member 21 in the axial direction.

[0058] Certainly, in the embodiment of the present application, the locking and fastening member 221 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the fastening member 221 is arranged on the outer wall of the housing 1, and the clamping groove 12 is arranged on the inner wall of the bending part 222.

[0059] By arranging the fastening member 221 on the inner wall of the bending part 222 and arranging the clamping groove 12 on the outer wall of the housing 1, when the bending part 222 is connected to the housing 1, the bending part 222 and the housing 1 squeeze the fastening member 221 in the radial direction, so that the fastening member 221 is embedded in the clamping groove 12, effectively improving the connection stability between the fastening member 221 and the clamping groove 12. Moreover, a sealing ring can be arranged between the outer walls of the bending part 222 and the housing 1. By arranging the sealing ring, the sealing performance between the bending part 222 and the housing 1 is further strengthened.

[0060] In one example, the seal 21 has a recess 211, and one side of the locking portion 22 close to the seal 21 has a first protrusion 223. In a state where the locking portion 22 is connected to the housing 1, the first protrusion 223 is embedded in the recess 211, and the first protrusion 223 and the recess 211 form a limiting fit. The locking portion 22 axially presses the seal 21 to cause the seal 21 to undergo compressive deformation in the radial direction, and the seal 21 extends to abut against the first protrusion 223.

[0061] As Figures 2 to 6 shown, the seal 21 has a circular plate-like structure. A recess 211 is provided on the upper surface of the seal 21, and a first protrusion 223 is provided on the lower surface of the locking portion 22. The first protrusion 223 is arranged corresponding to the recess 211. In a state where the housing 1 is connected to the locking portion 22, the first protrusion 223 is embedded in the recess 211. That is to say, in a state where the housing 1 is connected to the locking portion 22, the top of the seal 21 is fitted with the bottom of the locking portion 22, that is, the lower surface of the locking portion 22 is in limiting fit and sealed with the upper surface of the seal 21. Not only can the seal 21 be prevented from falling off by the locking portion 22, but the seal 21 can also be abutted by the locking portion 22 to cause the seal 21 to extend in the radial direction, effectively improving the sealing effect between the seal 21 and the locking portion 22.

[0062] The recess 211 of the seal 21 is a columnar groove provided on the upper surface of the seal 21. The first protrusion 223 on the lower surface of the locking portion 22 is a columnar protrusion arranged opposite to the columnar groove. The shape and size of the columnar protrusion and the columnar groove match. In a state where the housing 1 is connected to the locking portion 22, the columnar protrusion is embedded in the columnar groove, and the locking portion 22 and the housing 1 axially press the seal 21 along the axis of the housing 1 to cause the seal 21 to extend in the radial direction of the housing 1, so that the seal 21 is closely attached to the columnar protrusion, effectively improving the sealing effect between the locking portion 22 and the seal 21.

[0063] Of course, in the embodiment of the present application, the locking portion 22 and the seal 21 are not limited to the above structures, and those skilled in the art can set them according to actual needs. For example, a first protrusion 223 is provided at the edge of the upper surface of the seal 21, the locking portion 22 has a recess 211, the recess 211 is arranged opposite to the first protrusion 223. In a state where the locking portion 22 is connected to the housing 1, the locking portion 22 and the housing 1 axially press the seal 21 along the axis of the housing 1 to cause the first protrusion 223 to undergo compressive deformation in the radial direction of the housing 1, and extend in the radial direction of the housing 1 to abut against the inner wall of the recess 211.

[0064] The first protrusion 223 and the locking portion 22 can be connected by means such as welding, bonding or integral molding.

[0065] In one example, one side of the seal 21 facing away from the first protrusion 223 has a fitting portion 212. In a state where the locking portion 22 is connected to the housing 1, the fitting portion 212 abuts against the housing 1. The locking portion 22 axially presses the seal 21 to cause the fitting portion 212 to undergo compressive deformation in the radial direction, and extend in the radial direction of the housing 1 until it abuts against the housing 1.

[0066] As Figures 2 to 6 shown, the seal 21 has a circular plate-like structure. A recess 211 is provided on the upper surface of the seal 21, and a fitting portion 212 is provided on one side of the seal 21 facing away from the recess 211. The fitting portion 212 is columnar, and the fitting portion 212 is embedded in the receiving cavity 11, and the outer wall of the fitting portion 212 abuts against the inner wall of the housing 1.

[0067] The seal 21 is connected to the housing 1, and the fitting portion 212 is embedded in the receiving cavity 11. The seal 21 seals the receiving cavity 11 through the fitting portion 212, preventing water from entering the receiving cavity 11 through the opening of the housing 1 and damaging the electrical components in the receiving cavity 11.

[0068] The seal 21 can be made of elastic materials such as rubber and silica gel. By using the elastic seal 21, the fitting portion 212 of the seal 21 can be in interference fit with the housing 1. In a state where the locking portion 22 is connected to the housing 1, the locking portion 22 and the housing 1 axially press the seal 21, causing the fitting portion 212 of the seal 21 to undergo compressive deformation in the radial direction of the housing 1, causing the fitting portion 212 to contract in the radial direction, so that the fitting portion 212 closely fits the inner wall of the housing 1 to seal the receiving cavity 11 of the housing 1.

[0069] The seal 21 is located in the receiving cavity 11 and close to the opening of the housing 1. The connection of the locking portion 22 to the housing 1 can prevent the seal 21 from falling off from the opening, affecting the waterproof effect of the ultrasonic transducer.

[0070] In one example, the seal 21 has an extension portion 213. The extension portion 213 is arranged along the axial direction of the housing 1. The wire 3 can pass through the extension portion 213 and extend into the receiving cavity 11. In a state where the locking portion 22 is connected to the housing 1, the locking portion 22 axially presses the extension portion 213 to cause the extension portion 213 to undergo compressive deformation in the radial direction, and contract in the radial direction of the housing 1 until it abuts against the wire 3; wherein, the extension portion 213 has a second protrusion 214, and the second protrusion 214 is arranged along the circumferential direction of the extension portion 213.

[0071] As Figures 2 to 6As shown, the extension part 213 is made of elastic materials such as rubber and silica gel. The extension part 213 and the seal 21 can be connected by bonding or integral molding. The extension part 213 is used for the wire 3 to extend into the accommodation cavity 11. By using elastic materials for the extension part 213, the sealing performance between the extension part 213 and the wire 3 can be enhanced.

[0072] The extension part 213 is arranged along the axial direction of the housing 1. The top end of the extension part 213 can penetrate through the locking part 22, so that the wire 3 can pass through the extension part 213 and extend into the accommodation cavity 11. One end of the wire 3 is connected to the electrical component in the accommodation cavity 11 through the extension part 213. During the connection process between the locking part 22 and the housing 1, the locking part 22 gradually moves downward, and at the same time, the extension part 213 gradually extends out of the locking part 22. During the downward pressing process of the locking part 22, the locking part 22 squeezes the extension part 213 in the radial direction, so that the diameter dimension of the extension part 213 is reduced, thereby tightly adhering to the wire 3, reducing the gap between the extension part 213 and the wire 3, sealing the wire 3 and the extension part 213, preventing water from entering the accommodation cavity 11 through the gap between the wire 3 and the extension part 213, improving the sealing effect, and effectively prolonging the service life of the ultrasonic transducer.

[0073] As Figure 2 , Figures 4 to 6 shown, a second protrusion 214 is provided on the outer wall of the extension part 213. The second protrusion 214 is annular and sleeved on the extension part 213. By providing the second protrusion 214 on the outer wall of the extension part 213, when the housing 1 is connected to the locking part 22, the second protrusion 214 on the outer periphery of the extension part 213 is squeezed by the locking part 22 in the radial direction. By arranging the second protrusion 214 between the extension part 213 and the locking part 22, the reduction range of the extension part 213 in the radial direction is effectively increased, which is beneficial to reducing the gap between the extension part 213 and the wire 5 and improving the tightness between the seal 21 and the wire 5.

[0074] Of course, in the embodiment of the present application, the second 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 second protrusion 214 can also be arc-shaped, and a plurality of arc-shaped second protrusions 214 are arranged along the circumferential direction of the extension part 213.

[0075] In one example, the extension part 213 has a through hole, and the through hole communicates with the accommodation cavity 11. When the locking part 22 is connected to the housing 1, the diameter dimension of the through hole is reduced.

[0076] As Figures 2 to 6As shown, the extension portion 213 has a through hole provided along the axial direction of the housing 1, and this through hole is for the wire 3 to pass through. By providing the through hole, it is convenient for the end of the wire 3 to pass through the extension portion 213. The extension portion 213 is connected to the housing 1 through the locking portion 22 to squeeze the seal 21 along the axial direction of the housing 1, causing the extension portion 213 to undergo compressive deformation in the radial direction, thereby reducing the diameter size of the through hole, that is, narrowing the gap between the extension portion 213 and the wire 3, preventing water from entering the accommodation cavity 11 through the gap between the wire 3 and the extension portion 213, improving the sealing effect, and effectively extending the service life of the ultrasonic transducer.

[0077] In one example, the accommodation cavity 11 includes a first cavity 111 and a second cavity 112. The diameter size of the first cavity 111 is larger than that of the second cavity 112, and the seal 21 is provided in the first cavity 111.

[0078] As Figures 2 to 6 shown, the accommodation cavity 11 includes a first cavity 111 and a second cavity 112. The first cavity 111 and the second cavity 112 are arranged along the axial direction of the housing 1. The first cavity 111 is located above the second cavity 112.

[0079] Of course, in the embodiment of the present application, the accommodation cavity 11 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, the first cavity 111 can also be located below the second cavity 112.

[0080] The seal 21 is provided at one end of the first cavity 111 away from the second cavity 112. The seal 21 cooperates with the first cavity 111 to seal the second cavity 112, preventing water from entering the accommodation cavity 11 and damaging the electrical components in the second cavity 112.

[0081] As Figures 2 to 6 shown, the diameter size of the first cavity 111 is larger than that of the second cavity 112, so as to form a stepped surface between the first cavity 111 and the second cavity 112. By providing the stepped surface, it is convenient for the electrical components to be arranged in the accommodation cavity 11.

[0082] In one example, a transfer board 4 is provided in the first cavity 111, a voltage ceramic 5 is provided in the second cavity 112, the transfer board 4 is located between the seal 21 and the voltage ceramic 5, and one end of the wire 3 passes through the through hole and the seal 21 and is connected to the transfer board 4.

[0083] As Figures 2 to 6 shown, the diameter size of the first cavity 111 is larger than that of the second cavity 112. A stepped surface is formed at the connection between the first cavity 111 and the second cavity 112.

[0084] The edge of the adapter board 4 is lapped on the step surface. Above the adapter board 4 is the seal 21, and below the adapter board 4 is the piezoelectric ceramic. The piezoelectric ceramic is bonded to the bottom of the second cavity 112, that is to say, the piezoelectric ceramic is bonded inside the housing 1.

[0085] Leads are led out from the piezoelectric ceramic and welded to the connection board, and one end of the wire 3 is connected to the connection board, and the other end of the wire 3 penetrates through the extension part 213. In the state where the housing 1 is connected to the locking part 22, the locking part 22 and the housing 1 axially squeeze the seal 21, causing the seal 21 to undergo compressive deformation in the radial direction, and the circumferential edges of the seal 21 are respectively abutted against the inner wall of the locking part 22 and the inner wall of the housing 1, realizing double sealing between the seal 21 and the housing 1. During the downward pressing of the locking part 22, the extension part 213 undergoes compressive deformation in the radial direction, and the through hole of the extension part 213 shrinks in the radial direction, effectively reducing the gap between the extension part 213 and the wire 3, preventing water from entering the accommodation cavity 11 through the gap between the wire 3 and the extension part 213 and damaging electrical components such as the adapter board 4 and the piezoelectric ceramic in the accommodation cavity 11.

[0086] In one example, the sealing assembly 2 further includes a sealing ring 23, and the sealing ring 23 is sleeved on the housing 1.

[0087] As Figures 1 to 6 shown, a sealing ring 23 is sleeved outside the housing 1. By providing the sealing ring 23 outside the housing 1, the sealing connection between the housing 11 and the external structure can be effectively strengthened, and the sealing effect of the ultrasonic transducer can be further enhanced.

[0088] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can 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. An ultrasonic transducer, characterized in that: include: A housing (1), wherein the housing (1) has a receiving chamber (11); A sealing assembly (2), the sealing assembly (2) comprising a sealing member (21) and a locking portion (22), the sealing member (21) being arranged in the accommodating cavity (11), and the locking portion (22) being connectable to the housing (1); When the locking portion (22) is connected to the housing (1), the opposite sides of the sealing member (21) respectively abut against the locking portion (22) and the housing (1), the locking portion (22) and the housing (1) squeeze the sealing member (21) in the axial direction, the sealing member (21) undergoes compression deformation in the radial direction, and extends in the radial direction of the housing (1) until it abuts against the inner walls of the housing (1) and the locking portion (22).

2. The ultrasonic transducer according to claim 1, characterized in that: The locking portion (22) comprises a buckling piece (221), the housing (1) has a slot (12), and when the locking portion (22) is connected to the housing (1), the buckling piece (221) is embedded in the slot (12).

3. The ultrasonic transducer according to claim 2, characterized in that: The locking portion (22) further comprises a bending portion (222), wherein the bending portion (222) is arranged on the locking portion (22), the buckling member (221) is arranged on the bending portion (222) along the circumferential direction, and the bending portion (222) abuts against the shell (1) along the radial direction.

4. The ultrasonic transducer according to claim 3, characterized in that: The buckling piece (221) is arranged on a side of the bending portion (222) close to the axis, and when the locking portion (22) is connected to the shell (1), the bending portion (222) and the shell (1) squeeze the buckling piece (221) in the radial direction.

5. The ultrasonic transducer according to claim 3, characterized in that: The sealing member (21) has a recessed portion (211), and a side of the locking member (22) close to the sealing member (21) has a first protrusion (223). When the locking member (22) is connected to the housing (1), the first protrusion (223) is embedded in the recessed portion (211), and the first protrusion (223) forms a limiting fit with the recessed portion (211). The locking member (22) presses the sealing member (21) in the axial direction so that the sealing member (21) is compressed and deformed in the radial direction, and the sealing member (21) is extended until it abuts against the first protrusion (223).

6. The ultrasonic transducer according to claim 5, characterized in that: The sealing member (21) has a fitting portion (212) on the side facing away from the first protrusion (223). When the locking portion (22) is connected to the housing (1), the fitting portion (212) abuts against the housing (1). The locking portion (22) presses the sealing member (21) in the axial direction so that the fitting portion (212) is compressed and deformed in the radial direction and extends in the radial direction of the housing (1) until it abuts against the housing (1).

7. The ultrasonic transducer according to claim 4, characterized in that: The sealing member (21) has an extension portion (213), the extension portion (213) is arranged along the axial direction of the housing (1), the wire (3) can pass through the extension portion (213) and extend into the accommodating cavity (11), and when the locking portion (22) is connected to the housing (1), the locking portion (22) presses the extension portion (213) in the axial direction so that the extension portion (213) is compressed and deformed in the radial direction, and shrinks in the radial direction of the housing (1) until it abuts against the wire (3); The extension portion (213) has a second protrusion (214), and the second protrusion (214) is arranged along the circumferential direction of the extension portion (213).

8. The ultrasonic transducer according to claim 7, characterized in that: The accommodating cavity (11) comprises a first cavity (111) and a second cavity (112); the diameter of the first cavity (111) is greater than the diameter of the second cavity (112); and the sealing element (21) is arranged in the first cavity (111).

9. The ultrasonic transducer according to claim 8, characterized in that: An adapter plate (4) is arranged in the first cavity (111), a voltage ceramic (5) is arranged in the second cavity (112), the adapter plate (4) is located between the sealing member (21) and the voltage ceramic (5), and one end of the wire (3) passes through the extension portion (213) and the sealing member (21) to be connected to the adapter plate (4).

10. The ultrasonic transducer according to claim 1, characterized in that: The sealing assembly (2) further comprises a sealing ring (23), wherein the sealing ring (23) is sleeved on the housing (1).

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