High-sealing sensor

Abstract

The high-sealing sensor comprises a shell, a wire harness, a waterproof sleeve, a rear plug, a front plug, a rear plug cover, a magnetic core, a fixing support and a circuit board, the circuit board and the magnetic core are arranged on the fixing support, one end, away from the fixing support, of the circuit board extends to one side of the rear plug, one end, away from the fixing support, of the magnetic core extends to one side of the front plug, and the other end, away from the fixing support, of the circuit board extends to one side of the rear plug. A rear plug hole is formed in the rear plug, a rear plug cover hole is formed in the rear plug cover, one end of the wire harness is electrically connected with the circuit board, the other end of the wire harness sequentially penetrates through the rear plug hole and the rear plug cover hole and extends out of the shell, one end of the waterproof sleeve extends into the shell, is arranged in the rear plug hole and is in close fit with the rear plug hole, and the other end of the waterproof sleeve extends out of the shell. The wire harness extending out of the shell penetrates through the wire harness hole, and the wire harness is tightly matched with the wire harness hole, so that the position of the wire harness and the position of the rear plug are respectively sealed, water is effectively prevented from entering the sensor, the waterproof reliability is ensured, and the service life is also ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a high-sealing sensor. Background Art

[0002] The cylindrical sensor is a type of sensor on the market. Its main components include a shell, a rear plug, a rear plug cover, a front plug, a magnetic core, a fixed bracket and a circuit board. The shell is generally a threaded tube. When assembled, the front and rear plugs are distributed at both ends of the shell, and the rear plug cover is arranged on the rear plug. The magnetic core, the fixed bracket and the circuit board are distributed in the shell, wherein the circuit board and the magnetic core are arranged on both ends of the fixed bracket and installed with limit stops. The end of the circuit board away from the fixed bracket extends to one side of the rear plug, and the end of the magnetic core away from the fixed bracket extends to one side of the front plug. One end of the wiring harness equipped on the sensor is connected to the circuit board, and the other end passes through the rear plug and the rear plug cover to the outside. At the same time, after the circuit board, front plug, magnetic core, fixed bracket and wiring harness are set on the shell, glue will be poured, and the rear plug and rear plug cover involved after glue pouring are sequentially set on the other end of the shell away from the front plug.

[0003] Although the sensor assembled in the above manner has been sealed with glue, that is, the glue has been solidified, in actual use, the wiring harness installed on the sensor may be twisted, pulled, etc. due to different usage conditions. Therefore, after a period of use, there is a certain possibility that the wiring harness and the glue may become loose, that is, a gap may appear, which may cause the sensor to be not waterproof when used in a humid environment. That is, water may enter the sensor through the gap, causing damage to the circuit board, reducing the service life of the sensor, and making it lose its function. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the utility model provides a sensor with high sealing performance to ensure that the wiring harness position is not easily infiltrated with water.

[0005] In order to achieve the above purpose, the utility model adopts a high-sealing sensor, including a shell, a wiring harness, a waterproof cover, a rear plug arranged at one end of the shell, a front plug arranged at the other end of the shell, a rear plug cover arranged on the rear plug and located away from one end of the shell, a magnetic core arranged in the shell, a fixed bracket and a circuit board, the circuit board and the magnetic core are arranged on the fixed bracket and limited, the circuit board extends to a side of the rear plug relative to the end away from the fixed bracket, and the magnetic core extends to a side of the front plug relative to the end away from the fixed bracket, a rear plug hole is opened in the rear plug, and a rear plug cover hole is opened in the rear plug cover, one end of the wiring harness is electrically connected to the circuit board, and the other end passes through the rear plug hole and the rear plug cover hole in sequence and extends to the outside of the shell;

[0006] One end of the waterproof sleeve extends into the shell and is inserted into the rear plug hole and fits tightly. The other end extends outside the shell. A wiring harness hole is opened in the waterproof sleeve. The wiring harness extending outside the shell passes through the wiring harness hole, and the wiring harness and the wiring harness hole fit tightly.

[0007] The above beneficial effect lies in: due to the water inlet position of the sensor harness currently used on the market, that is, water will enter the gap between the harness and the rear plug along the gap between the harness and the rear plug cover, and then enter the position of the circuit board. The utility model installs a waterproof cover in the sensor, and the outer part of the waterproof cover is tightly matched with the position of the rear plug hole, and the harness and the harness hole opened in the waterproof cover are respectively sealed, thereby achieving effective prevention of water from entering the sensor by respectively sealing the position of the harness and the position of the rear plug, and also ensuring the waterproof reliability of the sensor, and also ensuring the service life of the sensor.

[0008] The utility model is further configured such that the waterproof cover includes an inner sealing portion distributed on the inner wall of the wiring harness hole, and an outer sealing portion distributed outside the waterproof cover, the waterproof cover cooperates with the rear plug hole, the outer sealing portion contacts and presses against the hole wall of the rear plug hole, and the rear plug portion on the sensor is sealed, and the wiring harness passing through the wiring harness hole contacts and presses against the wiring harness through the inner sealing portion in the wiring harness hole, thereby forming a wiring harness seal on the sensor.

[0009] By involving the inner and outer sealing parts of the waterproof sleeve, the position of the waterproof sleeve and the rear plug, as well as the external position of the wiring harness, are ensured to be reliably sealed, and the design reliability of the utility model is also guaranteed.

[0010] The utility model is further configured such that the outer sealing portion includes a rear plug insertion portion extending into the rear plug hole, and a plurality of raised sealing rings distributed on the outer position of the rear plug insertion portion, the waterproof sleeve extends into the rear plug through the rear plug insertion portion, and through the plurality of sealing rings respectively contacting the rear plug hole, a plurality of sealing protections of the rear plug on the sensor are formed; the inner sealing portion is a plurality of annular protrusions formed on the inner wall of the wiring harness hole, the wiring harness hole cooperates with the wiring harness, and the plurality of annular protrusions are respectively in contact with the wiring harness.

[0011] Through the above arrangement, the waterproof cover can be prevented from being damaged due to the difference in diameter of the wiring harness and the aperture of the rear plug hole, thereby ensuring that the waterproof cover and the rear plug hole are in reliable cooperation, and that the several raised sealing rings involved are in reliable contact and waterproofing with the rear plug hole. In addition, by involving several sealing rings on the outer sealing part and several annular protrusions on the inner sealing part, the reliability of waterproofing can be further ensured, that is, reliable waterproofing can be achieved through several waterproofing methods.

[0012] The utility model is further configured that a fitting extrusion portion is formed in the rear plug cover hole on the side opposite to the rear plug insertion portion, and during the fitting stage of the rear plug cover, the rear plug and the waterproof sleeve, the waterproof sleeve is squeezed into the rear plug through the fitting extrusion portion, and the fitting extrusion portion contacts and squeezes the rear plug insertion portion; the waterproof sleeve is a silicone elastic member.

[0013] Through the above-mentioned arrangement, when the waterproof sleeve is initially installed, in some cases, the waterproof sleeve and the rear plug hole are only in simple contact without corresponding tight fit, and through the arrangement of the cooperating extrusion portion, since the sensor involved in the utility model is an improvement on the current sensor on the market, that is, the shell, the rear plug, and the rear plug cover are basically unchanged, the sensor can be assembled without involving the waterproof sleeve. As a result, after the waterproof sleeve is installed, the rear plug insertion portion on the waterproof sleeve can be reliably pressed into the rear plug hole through the action of the cooperating extrusion portion, and as the rear plug insertion portion continuously enters the rear plug hole, since the waterproof sleeve is a silicone elastic member, the several raised sealing rings involved can be in contact with the rear plug hole and can be squeezed to a certain extent, thereby ensuring reliable sealing of the rear plug hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of a sensor of a specific embodiment of the utility model;

[0015] Figure 2 It is an exploded schematic diagram of a sensor of a specific embodiment of the utility model;

[0016] Figure 3 It is a top view schematic diagram of a sensor of a specific embodiment of the utility model;

[0017] Figure 4 yes Figure 3 AA cross-sectional view of ;

[0018] Figure 5 It is a three-dimensional schematic diagram of a waterproof cover according to a specific embodiment of the utility model;

[0019] Figure 6 It is a top view schematic diagram of a waterproof cover of a specific embodiment of the utility model;

[0020] Figure 7 yes Figure 6 BB cross-sectional view;

[0021] Figure 8 It is a three-dimensional schematic diagram of a rear plug cover according to a specific embodiment of the utility model. DETAILED DESCRIPTION

[0022] like Figure 1-8As shown, the specific embodiment of the utility model is a high-sealing sensor, including a shell 6, a wiring harness 1, a waterproof cover 2, a rear plug 4 arranged at one end of the shell 6, a front plug 5 arranged at the other end of the shell 6, a rear plug cover 3 arranged on the rear plug 4 and located away from one end of the shell 6, a magnetic core 8 arranged in the shell 6, a fixing bracket 7 and a circuit board 9, the circuit board 9 and the magnetic core 8 are arranged on the fixing bracket 7 and are limited, the circuit board 9 extends to one side of the rear plug 4 relative to the end away from the fixing bracket 7, the magnetic core 8 extends to one side of the front plug 5 relative to the end away from the fixing bracket 7, a rear plug hole 41 is opened in the rear plug 4, and a rear plug cover hole 31 is opened in the rear plug cover 3, one end of the wiring harness 1 is electrically connected to the circuit board 9, and the other end passes through the rear plug hole 41 and the rear plug cover hole 31 in sequence and extends to the outside of the shell 6;

[0023] One end of the waterproof cover 2 extends into the shell 6 and is inserted into the rear plug hole 41 and fits tightly. The other end extends outside the shell 6. A wiring harness hole 21 is opened in the waterproof cover 2. The wiring harness 1 extending outside the shell 6 passes through the wiring harness hole 21, and the wiring harness 1 and the wiring harness hole 21 fit tightly.

[0024] As mentioned above, due to the water inlet position of the sensor harness 1 currently used on the market, water will enter the gap between the harness 1 and the rear plug 4 along the gap between the harness 1 and the rear plug cover 3, and then enter the position of the circuit board 9. The utility model installs a waterproof cover 2 in the sensor, and the outer part of the waterproof cover 2 is tightly matched with the position of the rear plug hole 41, and the harness hole 21 opened in the harness 1 and the waterproof cover 2, thereby achieving the position of the harness 1 and the position of the rear plug 4 respectively. The position is sealed, and then the water is effectively prevented from entering the sensor, which also ensures the waterproof reliability of the sensor, and also ensures the service life of the sensor.

[0025] like Figure 2 , 4 -7, the waterproof cover 2 includes an inner sealing portion 24 distributed on the inner wall of the harness hole 21, and an outer sealing portion 23 distributed outside the waterproof cover 2, the waterproof cover 2 cooperates with the rear plug hole 41, the outer sealing portion 23 contacts and presses against the hole wall of the rear plug hole 41, and the rear plug 4 on the sensor is sealed, the harness 1 passing through the harness hole 21 contacts and presses against the harness 1 through the inner sealing portion 24 in the harness hole 21, thereby forming a seal for the harness 1 on the sensor.

[0026] like Figure 2 , 4-7, the outer sealing portion 23 includes a rear plug insertion portion 22 extending into the rear plug hole 41, and a plurality of raised sealing rings 23 distributed on the outer position of the rear plug insertion portion 22. The waterproof sleeve 2 extends into the rear plug 4 through the rear plug insertion portion 22, and is respectively in contact with the rear plug hole 41 through a plurality of sealing rings 23, thereby forming a plurality of sealing protections for the rear plug 4 on the sensor; the inner sealing portion 24 is a plurality of annular protrusions formed on the inner wall of the wiring harness hole 21, the wiring harness hole 21 cooperates with the wiring harness 1, and the plurality of annular protrusions are respectively in contact with the wiring harness 1.

[0027] like Figure 1-2 As shown in Figures 4-8, a fitting extrusion portion 32 is formed in the rear plug cover hole 31 on the side facing the rear plug insertion portion 22. During the fitting stage of the rear plug cover 3, the rear plug 4 and the waterproof cover 2, the waterproof cover 2 is squeezed into the rear plug 4 through the fitting extrusion portion 32, and the fitting extrusion portion 32 contacts and squeezes the rear plug insertion portion 22; the waterproof cover 2 is a silicone elastic member.

Claims

1. A high-sealing sensor, comprising a housing, a wiring harness, a rear plug disposed at one end of the housing, a front plug disposed at the other end of the housing, a rear plug cover disposed on the rear plug and located away from one end of the housing, a magnetic core disposed in the housing, a fixing bracket and a circuit board, wherein the circuit board and the magnetic core are disposed on the fixing bracket and are limited, a side of the circuit board extending to the rear plug relative to the end away from the fixing bracket, a side of the magnetic core extending to the front plug relative to the end away from the fixing bracket, a rear plug hole is provided in the rear plug, and a rear plug cover hole is provided in the rear plug cover, one end of the wiring harness is electrically connected to the circuit board, and the other end passes through the rear plug hole and the rear plug cover hole in sequence and extends to the outside of the housing, characterized in that: The sensor also includes a waterproof case; One end of the waterproof sleeve extends into the shell and is inserted into the rear plug hole and fits tightly. The other end extends outside the shell. A wiring harness hole is opened in the waterproof sleeve. The wiring harness extending outside the shell passes through the wiring harness hole, and the wiring harness and the wiring harness hole fit tightly.

2. The high-seal sensor according to claim 1, characterized in that: The waterproof cover includes an inner sealing portion distributed on the inner wall of the wiring harness hole, and an outer sealing portion distributed outside the waterproof cover. The waterproof cover cooperates with the rear plug hole, and the outer sealing portion contacts and presses against the hole wall of the rear plug hole. The rear plug portion on the sensor is sealed, and the wiring harness passing through the wiring harness hole contacts and presses against the wiring harness through the inner sealing portion in the wiring harness hole, thereby forming a wiring harness seal on the sensor.

3. The high-seal sensor according to claim 2, characterized in that: The outer sealing portion includes a rear plug insertion portion extending into the rear plug hole, and a plurality of raised sealing rings distributed on the outer position of the rear plug insertion portion. The waterproof sleeve extends into the rear plug through the rear plug insertion portion, and through the respective contact of the plurality of sealing rings with the rear plug hole, a plurality of sealing protections of the rear plug on the sensor are formed.

4. The high-seal sensor according to claim 2, characterized in that: The inner sealing part is a plurality of annular protrusions formed on the inner wall of the harness hole. The harness hole is matched with the harness, and the plurality of annular protrusions are in contact with the harness respectively.

5. The high-seal sensor according to claim 3, characterized in that: A fitting extrusion portion is formed in the rear plug cover hole on the side facing the rear plug insertion portion. During the fitting stage of the rear plug cover, the rear plug and the waterproof sleeve, the waterproof sleeve is squeezed into the rear plug through the fitting extrusion portion, and the fitting extrusion portion contacts and squeezes the rear plug insertion portion.

6. The high-seal sensor according to claim 1, 2, 3, 4 or 5, characterized in that: The waterproof cover is a silicone elastic piece.

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