A waterproof structure for sensors

Abstract

This utility model discloses a waterproof sensor structure, including a connecting tube, a sealing sleeve, and a sealing cap. The connecting tube communicates with a housing, and a sealing ring seals the gap between the connecting tube and the housing. A first inclined surface is formed on the inner wall of the connecting tube, and one end of the sealing sleeve abuts against the first inclined surface. The sealing cap is adjustablely connected to the connecting tube, and the sealing cap abuts against the other end of the sealing sleeve. A through hole is formed in the sealing cap, and a wire passes through the through hole, the sealing sleeve, and the connecting tube in sequence. This utility model provides a waterproof sensor structure that improves the sensor's waterproof performance by sealing the gap between the housing and the wire through a sealing mechanism.

Description

Technical Field

[0001] This utility model relates to the field of sensor protection, and in particular to a waterproof sensor structure. Background Technology

[0002] Sensors are key devices that sense physical quantities (such as temperature, pressure, humidity, displacement, etc.) and convert them into electrical signals. Their core typically includes sensitive elements and processing circuits integrated on a PCB board. The PCB board is mounted inside the sensor housing, and wires pass through the housing to achieve electrical connection with the internal PCB to transmit signals and power.

[0003] When such sensors are deployed in harsh environments close to water sources or even exposed to liquid splashes or immersion, there is a risk that moisture in the environment may seep into the sensor through the tiny gaps between the wires and the housing. Once moisture enters the housing and comes into contact with the PCB or sensitive components, it will cause problems such as short circuits and component corrosion, affecting the normal operation and lifespan of the sensor. Therefore, it is necessary to implement a waterproof seal at the connection between the wires and the sensor housing to isolate the path of external moisture intrusion, which has become an urgent problem to be solved to ensure the long-term stable operation of the sensor in humid environments. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof sensor structure that improves the waterproof performance of the sensor by sealing the gap between the outer shell and the wires through a sealing mechanism.

[0005] The technical solution adopted by the waterproof sensor structure disclosed in this utility model is:

[0006] The device includes a connecting pipe, a sealing sleeve, and a sealing cap. The connecting pipe is connected to the outer shell, and a sealing ring is used to seal between the connecting pipe and the outer shell. The inner wall of the connecting pipe has a first inclined surface. One end of the sealing sleeve touches the first inclined surface. The sealing cap is adjustablely connected to the connecting pipe, and the sealing cap touches the other end of the sealing sleeve. A through hole is provided on the sealing cap. The wire passes through the through hole, the sealing sleeve, and the connecting pipe in sequence.

[0007] As a preferred embodiment, the sealing sleeve is made of an elastic material.

[0008] As a preferred embodiment, the outer side of the sealing sleeve is provided with a second inclined surface, the second inclined surface abutting against the first inclined surface, and the inner wall of the sealing sleeve is provided with a contact surface, the contact surface abutting against the outer side of the wire.

[0009] As a preferred embodiment, the outer side of the connecting pipe is provided with two sections of first thread, and the connecting pipe is connected to the outer shell through one of the sections of the first thread.

[0010] As a preferred embodiment, the sealing cover has a second thread inside, which is connected to another section of the first thread.

[0011] As a preferred embodiment, a limiting ring extends from the outer side of the sealing sleeve, and an annular groove is formed on the limiting ring, with the sealing ring placed inside the annular groove.

[0012] The beneficial effects of the waterproof sensor structure disclosed in this utility model are:

[0013] The connecting tube is installed on the housing, and the gap between the connecting tube and the housing is sealed by a sealing ring. The wire passes through the through hole, the sealing sleeve, and the connecting tube in sequence into the housing and is electrically connected to the PCB board. At this time, the sealing sleeve and the wire are in a clearance fit. Then, the sealing cap is adjusted to press the sealing sleeve into the connecting tube. Its first inclined surface compresses the sealing sleeve, causing the sealing sleeve to elastically deform and fit against the outside of the wire, thereby sealing the gap between the sealing sleeve and the wire. At the same time, the outside of the sealing sleeve seals the gap between itself and the first inclined surface. At this time, the sealing sleeve and the wire are in an interference fit. As a result, external moisture cannot seep into the housing from between the connecting tube and the housing, or between the connecting tube and the wire, significantly improving the waterproof performance of the sensor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a waterproof sensor structure according to the present invention.

[0015] Figure 2 This is an installation diagram of the connecting pipe, sealing sleeve, and sealing cap of a waterproof sensor structure according to this utility model.

[0016] Figure 3 This is a partial cross-sectional view of the connecting pipe, sealing sleeve, and sealing cap of a waterproof sensor structure according to this utility model.

[0017] Figure 4 This is a cross-sectional view of the outer shell, connecting pipe, sealing sleeve, and sealing cap of a waterproof sensor structure according to this utility model. Detailed Implementation

[0018] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0019] Please refer to Figures 1-4 .

[0020] The present invention discloses a waterproof sensor structure, including a connecting pipe 1, a sealing sleeve 2 and a sealing cap 3, for sealing the gap between the sensor housing 4 and the wire 41.

[0021] Two first threads are provided on the outer side of the connecting pipe 1. The two first threads are close to the two ends of the connecting pipe 1 respectively. A limiting ring extends from the outer side of the sealing sleeve 2. The limiting ring is located between the two first threads. An annular groove 11 is provided on the limiting ring. The annular groove 11 surrounds the outer side of the connecting pipe 1.

[0022] Furthermore, a sealing ring 111 is fitted on the outside of the connecting pipe 1, and the sealing ring 111 is placed in the annular groove 11.

[0023] Furthermore, the inner wall of the connecting pipe 1 is provided with a first inclined surface 12. In this embodiment, the first inclined surface 12 is preferably an annular conical surface, and the first inclined surface 12 causes the inner diameter of the connecting pipe 1 to gradually decrease.

[0024] The outer side of the sealing sleeve 2 is provided with a second inclined surface 21. The second inclined surface 21 is close to one end of the sealing sleeve 2. In this embodiment, the second inclined surface 21 is preferably an annular conical surface, which causes the outer diameter of the sealing sleeve 2 to gradually decrease. The inner wall of the sealing sleeve 2 is provided with a contact surface 2. In this embodiment, the contact surface 2 is preferably annular and is close to the second inclined surface 21. In this embodiment, the sealing sleeve 2 is preferably made of elastic silicone material, so that the sealing sleeve 2 has elastic deformation and sealing effect.

[0025] The sealing cap 3 has a through hole 31. In this embodiment, the inner diameter of the through hole 31 is preferably smaller than the outer diameter of the sealing sleeve 2. A second thread is provided inside the sealing cap 3.

[0026] During installation:

[0027] The sensor housing 4 has a threaded hole. The connecting pipe 1 is connected to the threaded hole of the housing 4 through a section of the first thread, so that the connecting pipe communicates with the housing through the threaded hole and fixes the connecting pipe 1 to the sensor housing 4. The limiting ring touches the outside of the housing 4 and limits the depth of the connecting pipe 1 installed in the threaded hole. At the same time, the sealing ring 111 touches the sensor housing 4 and is used to seal the gap between the connecting pipe 1 and the housing 4. External moisture cannot seep into the housing 4 from the gap between the connecting pipe 1 and the housing 4, thus improving the waterproof performance of the sensor.

[0028] Place the sealing sleeve 2 inside the connecting pipe 1, so that one end of the sealing sleeve 2 touches the first inclined surface 12 of the connecting pipe 1 through the second inclined surface 21; the sealing cover 3 is placed on the connecting pipe 1, and the sealing cover 3 is connected to the other part of the first thread of the connecting pipe 1 through the second thread, so that the sealing cover 3 can be connected to the connecting pipe 1 in an adjustable installation depth manner.

[0029] After the wire 41 passes through the through hole 31, the sealing sleeve 2, and the connecting tube 1 in sequence into the housing 4 and is electrically connected to the PCB board, the sealing sleeve 2 and the wire 41 are in a clearance fit. Rotating the adjusting sealing cover 3 pushes the sealing sleeve 2 to move axially. The axial movement of the sealing sleeve 2 causes its second inclined surface 21 to slide along the first inclined surface 12 of the connecting tube 1, so that the sealing sleeve 2 is subjected to radial compression. The contact surface 2 of the inner wall of the sealing sleeve 2 elastically deforms and the inner diameter shrinks, thus pressing against and clamping the outer side of the wire 41. The sealing sleeve 2 and the wire 41 are in an interference fit, thereby sealing the gap between the sealing sleeve 2 and the wire 41. At the same time, the second inclined surface 21 of the sealing sleeve 2 and the first inclined surface 12 of the connecting tube 1 are tightly fitted to seal the gap between them. External moisture cannot seep into the housing 4 from the gap between the connecting tube 1 and the wire 41, further improving the waterproof performance of the sensor.

[0030] This invention provides a waterproof sensor structure. A connecting tube is installed on the outer shell, and a sealing ring seals the gap between the connecting tube and the outer shell. A wire passes sequentially through a through hole, a sealing sleeve, and the connecting tube into the outer shell and is electrically connected to the PCB board. At this point, the sealing sleeve and the wire have a clearance fit. Subsequently, the sealing cap is adjusted to press the sealing sleeve into the connecting tube. Its first inclined surface compresses the sealing sleeve, causing it to elastically deform and conform to the outside of the wire, thus sealing the gap between the sealing sleeve and the wire. Simultaneously, the outer side of the sealing sleeve seals the gap between itself and the first inclined surface. At this point, the sealing sleeve and the wire have an interference fit. Therefore, external moisture cannot seep into the outer shell from between the connecting tube and the outer shell, or between the connecting tube and the wire, significantly improving the sensor's waterproof performance.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A waterproof structure for a sensor, used to seal the gap between the sensor housing and the wires, characterized in that, include: A connecting pipe is connected to the outer shell, and a sealing ring is provided between the connecting pipe and the outer shell. The inner wall of the connecting pipe is provided with a first inclined surface. A sealing sleeve, one end of which abuts against a first inclined surface; A sealing cap is adjustablely connected to a connecting pipe. The sealing cap abuts against the other end of a sealing sleeve, and a through hole is provided on the sealing cap. The wire passes through the through hole, the sealing sleeve, and the connecting tube in sequence.

2. The waterproof sensor structure as described in claim 1, characterized in that, The sealing sleeve is made of an elastic material.

3. The waterproof sensor structure as described in claim 2, characterized in that, The outer side of the sealing sleeve has a second inclined surface, which abuts against the first inclined surface. The inner wall of the sealing sleeve has a contact surface, which abuts against the outer side of the wire.

4. The waterproof sensor structure as described in claim 3, characterized in that, The outer side of the connecting pipe has two sections of first threads, and the connecting pipe is connected to the outer shell through one of the sections of the first threads.

5. The waterproof sensor structure as described in claim 4, characterized in that, The sealing cap has a second thread inside, which is connected to another section of the first thread.

6. The waterproof sensor structure as described in claim 5, characterized in that, A limiting ring extends from the outer side of the sealing sleeve, and an annular groove is provided on the limiting ring. The sealing ring is placed in the annular groove.

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