Ultrasonic sensor

Abstract

The utility model discloses an ultrasonic sensor, including casing, probe subassembly and control circuit board, the casing includes bottom shell and face shell, the bottom shell forms the accommodating cavity of top opening, the face shell cover is located the opening, the face shell is away from the direction of bottom shell convex and forms the convex part, the convex part forms the convex cavity of intercommunication accommodating cavity, the convex part is equipped with the through -opening of intercommunication convex cavity, the probe subassembly is installed in the convex cavity, the probe subassembly includes probe circuit board and probe, the probe is connected with probe circuit board electricity, and the probe is set up corresponding the through -opening, control circuit board is fixed in accommodating cavity and is connected with the probe circuit board electricity. The utility model discloses an ultrasonic sensor has compact structure, the small volume advantage.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and more specifically, to an ultrasonic sensor. Background Technology

[0002] Ultrasonic sensors, as non-contact detection devices, are widely used in industrial automation, environmental monitoring, and other fields. Existing ultrasonic sensors typically house components such as batteries, control circuits, and probe circuits within a recessed cavity in the base shell, and then assemble them by sealing the top and bottom shells together. While this structure provides protection for the internal components, its "stacked" layout results in low space utilization, making it difficult to optimize the sensor's horizontal area and vertical thickness, becoming a major obstacle to miniaturization and thinning. Furthermore, the probe mounting structure of existing sensors lacks effective support and positioning, easily leading to decreased detection accuracy; the connection method between the top and bottom shells is simplistic and lacks sufficient waterproofing; and the unreasonable internal circuit layout affects signal transmission stability. These problems severely restrict the reliability of ultrasonic sensors in complex environments. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content

[0003] The main objective of this invention is to propose an ultrasonic sensor that has the advantages of compact structure and reduced size.

[0004] To achieve the above objectives, the ultrasonic sensor proposed in this utility model includes: The housing includes a bottom shell and a top shell. The bottom shell forms a receiving cavity with an opening at the top. The top shell covers the opening. The top shell protrudes in a direction away from the bottom shell to form a protrusion. The protrusion forms a cavity communicating with the receiving cavity. The protrusion has an opening communicating with the cavity. A probe assembly is installed inside the convex cavity. The probe assembly includes a probe circuit board and a probe. The probe is electrically connected to the probe circuit board and is positioned corresponding to the through-hole. A control circuit board is fixed inside the receiving cavity and electrically connected to the probe circuit board.

[0005] In one embodiment, a reinforcing ring is provided inside the convex cavity, the reinforcing ring is connected to the inner wall of the convex cavity, the reinforcing ring is arranged circumferentially around the opening, and the probe extends out of the opening through the reinforcing ring.

[0006] In one embodiment, a plurality of first mounting posts are further provided inside the convex cavity. The plurality of first mounting posts are spaced apart along the circumference of the reinforcing ring. The first mounting posts connect the inner wall of the convex cavity and the reinforcing ring. The probe circuit board is mounted on the first mounting posts.

[0007] In one embodiment, a plurality of positioning posts are further provided in the convex cavity, and the probe circuit board is provided with positioning holes, the number of positioning holes being consistent with the number of positioning posts and corresponding one-to-one.

[0008] In one embodiment, the first mounting post has a first threaded hole, and a connecting bolt passes through the probe circuit board and is threadedly connected to the first mounting post.

[0009] In one embodiment, the ultrasonic sensor further includes a waterproof cap that is fitted over the probe and seals the bottom end of the reinforcing ring.

[0010] In one embodiment, the inner wall of the receiving cavity is provided with a snap-fit ​​protrusion, and the bottom end of the face shell is connected to a snap-fit ​​block. The snap-fit ​​block forms a snap-fit ​​hole for the snap-fit ​​protrusion to snap into. The face shell covers the opening, and the snap-fit ​​protrusion snaps into the snap-fit ​​hole. There are multiple snap-fit ​​protrusions, and the number of snap-fit ​​blocks is the same as the number of snap-fit ​​protrusions and is set in a one-to-one correspondence.

[0011] In one embodiment, a plurality of second mounting posts are provided in the receiving cavity, and the second mounting posts have second threaded holes, through which connecting bolts pass and are threadedly connected to the second mounting posts.

[0012] In one embodiment, the ultrasonic sensor further includes a battery disposed within the receiving cavity and electrically connected to the control circuit board.

[0013] In one embodiment, the ultrasonic sensor further includes a control button that extends through the bottom shell into the receiving cavity and is electrically connected to the control circuit board.

[0014] The technical solution of this utility model forms a vertical spatial layered structure by using the bottom shell cavity and the top shell convex cavity, and independently sets the probe assembly in the convex cavity of the top shell, thereby optimizing the internal spatial layout of the ultrasonic sensor, improving the structural compactness of the ultrasonic sensor, and reducing the volume of the ultrasonic sensor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the ultrasonic sensor provided by this utility model; Figure 2 A schematic diagram of the exploded structure at one angle in an embodiment of the ultrasonic sensor provided by this utility model; Figure 3 for Figure 2 A schematic diagram of the explosion structure from another angle; Figure 4 A three-dimensional structural schematic diagram of an embodiment of the faceplate provided by this utility model; Figure 5 An exploded structural diagram of an embodiment of the faceplate and probe assembly provided by this utility model; Figure 6 An exploded structural diagram of an embodiment of the bottom shell and top shell provided by this utility model.

[0017] Explanation of icon numbers: 100. Ultrasonic sensor; 1. Housing; 11. Bottom shell; 12. Front shell; 111. Receiving cavity; 121. Protrusion; 1211. Cavity; 1212. Through-hole; 2. Probe assembly; 21. Probe circuit board; 22. Probe; 3. Control circuit board; 4. Battery; 5. Reinforcing ring; 6. First mounting post; 7. Positioning post; 211. Positioning hole; 61. First threaded hole; 8. Waterproof cap; 1112. Snap-fit ​​protrusion; 122. Locking block; 1221. Locking hole; 9. Second mounting post; 91. Second threaded hole; 112. Control button.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

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

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] In existing technologies, ultrasonic sensors typically employ a design where a bottom shell and a top shell are combined to form a closed cavity. Internal components are stacked within the cavity of the bottom shell, resulting in a large horizontal space occupation and difficulty in compressing the vertical thickness. This layout makes the sensor bulky and unable to meet the miniaturization and thinness requirements of portable devices. For example, in smart home devices, where sensors need to be embedded in narrow installation spaces, traditional structures are difficult to adapt due to their excessive size.

[0023] Please refer to Figures 1 to 6 This utility model proposes an ultrasonic sensor 100, which includes a housing 1, a probe assembly 2, and a control circuit board 3. The housing 1 includes a bottom shell 11 and a top shell 12. The bottom shell 11 forms a receiving cavity 111 with an opening at the top. The top shell 12 covers the opening and protrudes from the bottom shell 11 to form a protrusion 121. The protrusion 121 forms a convex cavity 1211 communicating with the receiving cavity 111. The protrusion 121 has an opening 1212 communicating with the convex cavity 1211. The probe assembly 2 is installed in the convex cavity 1211. The probe assembly 2 includes a probe circuit board 21 and a probe 22. The probe 22 is electrically connected to the probe circuit board 21 and is positioned corresponding to the opening 1212. The control circuit board 3 is fixed in the receiving cavity 111 and electrically connected to the probe circuit board 21.

[0024] The bottom shell 11 refers to the basic housing 1 component that carries the internal components. It can be implemented using an injection-molded plastic housing 1, with an open top design to facilitate assembly of the front shell 12. The front shell 12 refers to the housing 1 component that covers the opening of the bottom shell 11. The protrusion 121 refers to the outward extension of the front shell 12, providing independent mounting space for the probe assembly 2. The through-hole 1212 refers to the through-hole opened in the protrusion 121, which can be implemented using a circular or rectangular hole structure, exposing the detection surface of the probe 22 to the external environment. The probe assembly 2 refers to the functional module containing signal processing circuitry and a transducer, which can be implemented using a surface-mount circuit board combined with the piezoelectric ceramic probe 22. The control circuit board 3 refers to the main control circuit module, which can be implemented using a multi-layer PCB board integrating a microprocessor and communication interface, and is located in the bottom area of ​​the bottom shell 11's receiving cavity 111.

[0025] Specifically, the bottom shell 11's receiving cavity 111 and the front shell 12's protruding cavity 1211 form a vertically layered spatial structure. The probe assembly 2 is independently installed inside the protruding cavity 1211, and its probe 22 directly detects external signals through the port 1212, shortening the signal transmission path. The control circuit board 3 is arranged inside the bottom shell 11's receiving cavity 111 and is electrically connected to the probe circuit board 21 via flexible wiring or connectors. The outwardly protruding shape of the front shell 12 provides the probe assembly 2 with independent installation space, avoiding horizontal overlap with components inside the bottom shell 11. The interconnected design of the protruding cavity 1211 and the receiving cavity 111 ensures internal wiring space while maintaining the overall structural airtightness. This three-dimensional spatial layout effectively decomposes the spatial competition relationship in traditional stacked structures, achieving a compact arrangement of functional modules in the vertical direction.

[0026] Through the above technical solutions, this application achieves a three-dimensional optimized layout of the sensor's internal space, effectively reducing the horizontal dimension and compressing the vertical thickness. The independent arrangement of the probe assembly 2 within the protrusion cavity 1211 of the face shell 12 avoids spatial interference with the control circuit board 3, improving the utilization rate of the internal space of the shell 1. The split-type shell 1 design provides independent installation space for the functional modules. The three-dimensional mating of the face shell 12 and the bottom shell 11 simplifies the assembly process and facilitates standardized production.

[0027] In one embodiment, a reinforcing ring 5 is provided inside the convex cavity 1211. The reinforcing ring 5 is connected to the inner wall of the convex cavity 1211. The reinforcing ring 5 is arranged circumferentially around the opening 1212. The probe 22 passes through the reinforcing ring 5 and extends out of the opening 1212.

[0028] The reinforcing ring 5 refers to the annular support structure formed around the opening 1212, which is fixed to the inner wall of the cavity 1211 by injection molding or mechanical assembly to enhance the local structural strength of the cavity 1211. The inner wall of the cavity 1211 refers to the inner surface of the cavity formed by the protrusion 121 of the faceplate 12, which supports the reinforcing ring 5 and transmits stress. The circumferential arrangement of the opening 1212 means that the arrangement direction of the reinforcing ring 5 is coaxial with the circular edge of the opening 1212.

[0029] Specifically, the reinforcing ring 5 is connected to the inner wall of the convex cavity 1211 through a ring structure, forming a closed support frame surrounding the through-hole 1212. When the probe 22 passes through the central through-hole of the reinforcing ring 5, its axial direction is perpendicular to the annular plane of the reinforcing ring 5, ensuring the alignment accuracy between the probe 22 and the through-hole 1212. When external pressure is applied to the protrusion 121 of the shell 12, the reinforcing ring 5 evenly distributes the stress to the inner wall of the convex cavity 1211 through the annular contact surface, avoiding deformation of the shell 1 caused by local stress concentration. The gap between the probe 22 and the reinforcing ring 5 can be precisely controlled by adjusting the diameter of the through-hole. For example, the diameter of the through-hole is slightly larger than the outer diameter of the probe 22 by 0.1 mm to 0.3 mm, which ensures both ease of assembly and limits the swaying amplitude of the probe 22 in a vibration environment.

[0030] Through the above technical solution, this application effectively suppresses the deformation of the convex cavity 1211 caused by mechanical impact or temperature change while maintaining the compact structure of the sensor, avoids the displacement of the probe 22 or signal distortion caused by external force, and significantly improves the measurement accuracy and service life of the sensor under complex working conditions.

[0031] In one embodiment, a plurality of first mounting posts 6 are also provided inside the convex cavity 1211. The plurality of first mounting posts 6 are arranged at intervals along the circumference of the reinforcing ring 5. The first mounting posts 6 connect the inner wall of the convex cavity 1211 and the reinforcing ring 5. The probe circuit board 21 is mounted on the first mounting posts 6.

[0032] The first mounting post 6 refers to a columnar structure used to support the probe circuit board 21. It may have threaded holes or snap-fit ​​structures inside for fixing the probe circuit board 21. The interval arrangement means that multiple first mounting posts 6 are evenly distributed in the circumferential direction, for example, arranged at 60-degree or 90-degree intervals, so that the probe circuit board 21 is subjected to uniform force and is installed stably.

[0033] Specifically, the first mounting posts 6 are spaced circumferentially along the reinforcing ring 5 to form a ring-shaped support system. The probe circuit board 21 is fixed to the top plane of the first mounting posts 6 by bolts or clips. The inner wall of the cavity 1211 and the reinforcing ring 5 are connected in a truss-like manner through the first mounting posts 6, creating a multi-layered installation space in the vertical direction. The probe circuit board 21 is raised to the upper area of ​​the cavity 1211, forming a layered layout with the control circuit board 3, avoiding overlap and space occupation on the horizontal plane. The synergistic effect of the reinforcing ring 5 and the first mounting posts 6 enables the probe circuit board 21 to obtain stable support within a limited space, while maintaining the precise alignment of the probe 22 with the port 1212.

[0034] Through the above technical solution, this application effectively solves the problem of low internal space utilization of the sensor, allowing for the accommodation of a larger capacity battery 4 or additional functional modules within the same external dimensions. The three-dimensional layout design reduces electromagnetic interference between the probe circuit board 21 and the control circuit board 3, and improves signal transmission stability.

[0035] In one embodiment, a plurality of positioning posts 7 are also provided in the cavity 1211, and the probe circuit board 21 is provided with positioning holes 211. The number of positioning holes 211 is consistent with the number of positioning posts 7 and corresponds one-to-one.

[0036] The positioning post 7 refers to a vertically extending columnar structure inside the protruding cavity 1211, which can be integrally formed with the protruding cavity 1211 using injection molding. This structure forms a physical limit through its cooperation with the positioning hole 211, used to eliminate horizontal displacement during circuit board installation. The positioning hole 211 refers to a through hole penetrating the probe circuit board 21, which can be processed by drilling or stamping. The hole diameter is slightly larger than the outer diameter of the positioning post 7 but smaller than its end limiting structure. This feature, through a clearance fit with the positioning post 7, ensures both smooth assembly and precise positioning.

[0037] Specifically, during assembly, when the probe circuit board 21 is mounted on the first mounting post 6, the top of the positioning post 7 is first inserted into the corresponding positioning hole 211. Since the positioning post 7 extends along the axis of the protrusion 1211 and its height exceeds the plane of the first mounting post 6, during the pressing down of the circuit board, the inner wall of the positioning hole 211 contacts the outer wall of the positioning post 7, forming a guiding effect, forcing the circuit board to move along a predetermined path until it completely fits the first mounting post 6. At this time, the limiting step at the top of the positioning post 7 contacts the surface of the circuit board, forming a vertical constraint. Simultaneously, the symmetrical distribution of multiple positioning posts 7 can counteract the rotational torque generated during assembly. Through the above technical solution, the convenience of installing the probe circuit board 21 is increased.

[0038] In one embodiment, the first mounting post 6 has a first threaded hole 61, and the connecting bolt passes through the probe circuit board 21 and is threadedly connected to the first mounting post 6.

[0039] The first threaded hole 61 refers to the threaded structure formed at the top of the first mounting post 6, which can be formed by mechanical tapping and is used to form a threaded fit with the connecting bolt. The connecting bolt is a fastener with external threads, and its length is designed to match the thickness of the probe circuit board 21 and the height of the first mounting post 6.

[0040] Specifically, during assembly, after the probe circuit board 21 is pre-positioned with the positioning post 7 in the cavity 1211 through the positioning hole 211, the connecting bolts pass through the pre-set through holes of the circuit board and are screwed into the threaded holes of the first mounting post 6. The axial pressure generated by the thread engagement presses the circuit board tightly against the top plane of the first mounting post 6, forming a fixed constraint perpendicular to the mounting plane. Since the threaded connection does not require additional welding or gluing areas, the vertical layout of the first mounting post 6 effectively reduces the lateral space occupied, thereby compressing the stacking height of the probe assembly 2 and the control circuit board 3 within the receiving cavity 111.

[0041] Through the above technical solution, this application solves the problem of large space occupation in circuit board mounting structures. Meanwhile, the bolt fastening provides reliable vibration resistance. This structure also supports quick disassembly and maintenance; the circuit board can be removed simply by loosening the bolts, reducing the risk of interference with other components during maintenance.

[0042] In one embodiment, the ultrasonic sensor 100 further includes a waterproof cap 8, which is fitted over the probe 22 and seals the bottom end of the reinforcing ring 5.

[0043] The waterproof cap 8 is an elastic sealing component that wraps around the probe 22, fitting tightly against the outer wall of the probe 22. It can be made of silicone or rubber. This component physically blocks the liquid penetration path by covering the assembly gap between the probe 22 and the reinforcing ring 5. Specifically, the waterproof cap 8 is fitted so that its inner wall continuously fits against the outer surface of the probe 22, and its outer edge extends to the bottom of the reinforcing ring 5, completely covering that area. The waterproof cap 8's wrapping seal on the bottom of the reinforcing ring 5 prevents liquid from seeping into the interior through capillary action at the connection between the reinforcing ring 5 and the inner wall of the cavity 1211.

[0044] Through the above technical solution, this application effectively solves the problem of moisture absorption caused by insufficient sealing inside the sensor. The waterproof cap 8, which wraps around the outer wall of the probe 22, prevents liquid from seeping in.

[0045] In one embodiment, the inner wall of the receiving cavity 111 is provided with a snap-fit ​​protrusion 1112, and the bottom end of the face shell 12 is connected to a snap-fit ​​block 122. The snap-fit ​​block 122 forms a snap-fit ​​hole 1221 for the snap-fit ​​protrusion 1112 to be snapped into. The face shell 12 covers the opening, and the snap-fit ​​protrusion 1112 is snapped into the snap-fit ​​hole 1221. There are multiple snap-fit ​​protrusions 1112, and the number of snap-fit ​​blocks 122 is the same as the number of snap-fit ​​protrusions 1112 and they are set in a one-to-one correspondence.

[0046] The snap-fit ​​protrusion 1112 refers to a protruding structure distributed circumferentially along the receiving cavity 111. Specifically, it can be implemented using injection-molded block bosses, and its height can match the depth of the snap-fit ​​hole 1221 to form an interference fit. The snap-fit ​​block 122 refers to a plate-like structure extending from the bottom of the face shell 12. Specifically, it can be integrally molded with the face shell 12 using an injection molding process, and the shape of the snap-fit ​​hole 1221 inside it is adapted to the cross-sectional shape of the snap-fit ​​protrusion 1112. The mating relationship between the snap-fit ​​protrusion 1112 and the snap-fit ​​hole 1221 is configured such that when the face shell 12 is vertically pressed into the bottom shell 11, it undergoes elastic deformation and returns to its original shape after reaching its final position, forming a mechanical interlock.

[0047] Specifically, when the face shell 12 is assembled with the bottom shell 11, the locking block 122 contacts the locking protrusion 1112 in the receiving cavity 111 as the face shell 12 moves downward. The locking protrusion 1112 undergoes elastic deformation under pressure and slides into the locking hole 1221. After assembly, the locking protrusion 1112 and the locking hole 1221 form a three-point contact constraint, restricting the horizontal displacement freedom of the face shell 12. Multiple locking protrusions 1112 are evenly distributed around the circumference of the receiving cavity 111, and the corresponding locking blocks 122 are arranged in the same distribution, ensuring that each locking point is positioned synchronously during assembly. This structure replaces traditional bolt fastening with geometric constraints, eliminating the threaded hole machining process and bolt installation steps.

[0048] Through the above technical solution, this application achieves tool-free rapid assembly of the front shell 12 and the bottom shell 11, reducing the number of parts required for connecting the shell 1 and improving the utilization rate of the sensor's internal space. The multi-point engagement of the snap-fit ​​protrusion 1112 and the snap-fit ​​hole 1221 effectively disperses stress concentration at the joint of the shell 1, avoiding connection failure caused by single-point force. This structure ensures assembly accuracy while compressing the overall size of the sensor, meeting the requirements for device miniaturization.

[0049] In one embodiment, a plurality of second mounting posts 9 are provided in the receiving cavity 111. The second mounting posts 9 have second threaded holes 91, and connecting bolts pass through the face shell 12 and are threadedly connected to the second mounting posts 9.

[0050] The second mounting post 9 refers to a columnar support structure vertically fixed to the bottom of the receiving cavity 111 of the bottom shell 11. It can be integrally molded with the bottom shell 11 using injection molding, providing a rigid connection support point between the front shell 12 and the bottom shell 11. The second threaded hole 91 refers to an internally threaded through hole opened along the axial direction of the second mounting post 9. It can be formed by mechanical tapping or insert pre-embedding, and is used to form a threaded engagement with the connecting bolt for detachable fixing. The connecting bolt is a fastener that penetrates both the front shell 12 and the second mounting post 9. The axial preload generated by screwing the bolt into the bolt secures the front shell 12 and the bottom shell 11 together.

[0051] Specifically, during the assembly of the front shell 12 and the bottom shell 11, the connecting bolts pass sequentially through the pre-set through holes in the front shell 12 and the second threaded holes 91 of the second mounting posts 9. The axial tensile force generated by the screwing in presses the front shell 12 tightly against the open end face of the bottom shell 11. Multiple second mounting posts 9 are evenly distributed circumferentially along the receiving cavity 111, ensuring that the bolt tightening force is evenly transmitted to the entire structure of the bottom shell 11, preventing localized deformation. The rigid fixing method formed by the threaded connection eliminates the assembly gap between the front shell 12 and the bottom shell 11, while the friction generated by the bolt preload effectively resists relative displacement caused by vibration. When maintenance is required, the front shell 12 and the bottom shell 11 can be separated without damage by unscrewing the connecting bolts in the opposite direction.

[0052] Through the above technical solution, this application solves the problem of unstable connection between the front shell 12 and the bottom shell 11. The rigid fixing structure formed by the threaded connection effectively suppresses the displacement of the shell 1 caused by vibration. The clamping effect generated by the bolt preload improves the sealing performance at the joint of the shell 1. At the same time, the detachable connection method provides convenience for the maintenance of internal components.

[0053] In one embodiment, the ultrasonic sensor 100 further includes a battery 4 disposed within a receiving cavity 111 and electrically connected to a control circuit board 3.

[0054] The battery 4 refers to an energy storage unit that can provide electrical energy to the control circuit board 3. Specifically, it can be implemented using a rechargeable lithium-ion battery 4, and its size can be adapted according to the internal space of the receiving cavity 111. The receiving cavity 111 refers to a cavity structure with an open top formed by the bottom shell 11. Specifically, it can be manufactured by injection molding. Its internal space is used to integrate components such as the control circuit board 3, the probe assembly 2, and the battery 4.

[0055] Specifically, the battery 4 is directly placed inside the receiving cavity 111 of the bottom shell 11 and is electrically connected to the control circuit board 3 via wires or connectors. The battery 4 can be installed on the side or below the control circuit board 3, and can be arranged using the longitudinal space of the receiving cavity 111.

[0056] Through the above technical solution, this application realizes the integrated integration of battery module 4 and control circuit board 3, optimizes the internal space utilization of the sensor, makes the overall structure of the product more compact, and provides the basic conditions for the miniaturization and thinning of ultrasonic sensor 100.

[0057] In one embodiment, the ultrasonic sensor 100 further includes a control button 112, which extends through the bottom shell 11 into the receiving cavity 111 and is electrically connected to the control circuit board 3.

[0058] The control button 112 is a physical operating component used to trigger the operating command of the control circuit board 3. The pressing end of the control button 112 passes through the outer surface of the bottom shell 11 and is exposed at the bottom of the housing 1, while the contact end extends into the receiving cavity 111 and forms a direct electrical connection with the control circuit board 3.

[0059] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An ultrasonic sensor, characterized in that, include: The housing includes a bottom shell and a top shell. The bottom shell forms a receiving cavity with an opening at the top. The top shell covers the opening. The top shell protrudes in a direction away from the bottom shell to form a protrusion. The protrusion forms a cavity communicating with the receiving cavity. The protrusion has an opening communicating with the cavity. A probe assembly is installed inside the convex cavity. The probe assembly includes a probe circuit board and a probe. The probe is electrically connected to the probe circuit board and is positioned corresponding to the through-hole. A control circuit board is fixed inside the receiving cavity and electrically connected to the probe circuit board.

2. The ultrasonic sensor as described in claim 1, characterized in that, A reinforcing ring is provided inside the convex cavity. The reinforcing ring is connected to the inner wall of the convex cavity and is arranged circumferentially around the opening. The probe extends out of the opening through the reinforcing ring.

3. The ultrasonic sensor as described in claim 2, characterized in that, The cavity is further provided with a plurality of first mounting posts, which are spaced apart circumferentially along the reinforcing ring. The first mounting posts connect the inner wall of the cavity and the reinforcing ring, and the probe circuit board is mounted on the first mounting posts.

4. The ultrasonic sensor as described in claim 3, characterized in that, The cavity is also provided with multiple positioning posts, and the probe circuit board is provided with positioning holes. The number of positioning holes is the same as the number of positioning posts and they correspond one-to-one.

5. The ultrasonic sensor as described in claim 3, characterized in that, The first mounting post has a first threaded hole, and the connecting bolt passes through the probe circuit board and is threadedly connected to the first mounting post.

6. The ultrasonic sensor as described in claim 3, characterized in that, The ultrasonic sensor also includes a waterproof cap, which is fitted over the probe and seals the bottom end of the reinforcing ring.

7. The ultrasonic sensor as described in claim 1, characterized in that, The inner wall of the receiving cavity is provided with snap-fit ​​protrusions, and the bottom end of the face shell is connected to a snap-fit ​​block. The snap-fit ​​block forms a snap-fit ​​hole for the snap-fit ​​protrusions to snap into. The face shell covers the opening, and the snap-fit ​​protrusions snap into the snap-fit ​​holes. There are multiple snap-fit ​​protrusions, and the number of snap-fit ​​blocks is the same as the number of snap-fit ​​protrusions and is set in a one-to-one correspondence.

8. The ultrasonic sensor as described in claim 7, characterized in that, The cavity contains a plurality of second mounting posts, each with a second threaded hole, and a connecting bolt passes through the face shell and is threadedly connected to the second mounting post.

9. The ultrasonic sensor as described in any one of claims 1 to 8, characterized in that, The ultrasonic sensor also includes a battery, which is disposed within the receiving cavity and electrically connected to the control circuit board.

10. The ultrasonic sensor according to any one of claims 1 to 8, characterized in that, The ultrasonic sensor also includes a control button, which extends through the bottom shell into the receiving cavity and is electrically connected to the control circuit board.

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