CN220912497U - Sensing test head - Google Patents

Abstract

The application relates to a sensing test head which comprises a shell, a temperature sensor, a connector, a flexible circuit board and an elastic sealing fixing piece, wherein the shell is provided with an assembly cavity, the temperature sensor is arranged at one end of the assembly cavity and at least partially extends out of the assembly cavity, and the connector is arranged at the other end of the assembly cavity. Along the direction from temperature sensor to connector, be equipped with elasticity sealing fixation spare and flexible circuit board in proper order in the assembly intracavity, temperature sensor's conductive pin wears to locate elasticity sealing fixation spare and electrically connect flexible circuit board. The inner wall in assembly chamber is equipped with first step structure, and first step structure is located one side that elastic seal mounting deviates from flexible circuit board, and the connector can apply towards first step structure compressive force to elastic seal mounting to make elastic seal mounting can seal the assembly chamber of cutting off between flexible circuit board and the temperature sensor. The sensing test head provided by the application solves the problem that the refrigerant is easy to leak due to shrinkage of an injection molding part.

Description

Sensing test head

Technical Field

The application relates to the technical field of sensing devices, in particular to a sensing test head.

Background

Because the temperature of the temperature sensor needs to be collected and put into the refrigerant pipeline to be fully contacted with the refrigerant, the thermistor needs to be connected to an external connector through a flexible circuit board (FPC). In addition, the PIN of the temperature sensor is generally required to be pre-buried by injection molding, but because the shrinkage is generated after the injection molding part is molded and the thermal stress of the injection molding part made of plastic material is different from that of the PIN made of metal material, the contact surface of the PIN and the injection molding part is Mao Xifeng, so that the refrigerant is easy to leak.

Disclosure of utility model

Accordingly, it is necessary to provide a sensing test head to solve the problem that the refrigerant is easy to leak due to shrinkage of the injection molding part.

The application provides a sensing test head which comprises a shell, a temperature sensor, a connector, a flexible circuit board and an elastic sealing fixing piece, wherein the shell is provided with an assembly cavity, the temperature sensor is arranged at one end of the assembly cavity and at least partially extends out of the assembly cavity, and the connector is arranged at the other end of the assembly cavity. Along the direction from temperature sensor to connector, be equipped with elasticity sealing fixation spare and flexible circuit board in proper order in the assembly intracavity, temperature sensor's conductive pin wears to locate elasticity sealing fixation spare and electrically connect flexible circuit board. The inner wall in assembly chamber is equipped with first step structure, and first step structure is located one side that elastic seal mounting deviates from flexible circuit board, and the connector can apply towards first step structure compressive force to elastic seal mounting to make elastic seal mounting can seal the assembly chamber of cutting off between flexible circuit board and the temperature sensor.

In one embodiment, the sensing test head further comprises a pressure sensitive element, the pressure sensitive element is arranged between the connector and the elastic sealing fixing piece, the pressure sensitive element is electrically connected with the flexible circuit board, the elastic sealing fixing piece is provided with a through hole for communicating the pressure sensitive element with an external space, and the pressure sensitive element can detect the pressure of the refrigerant through the through hole.

In one embodiment, the pressure sensitive element comprises a base and a pressure sensitive unit, the connector is in pressure connection with one end of the elastic sealing fixing piece far away from the temperature sensor through the base, so that the base and the elastic sealing fixing piece are in sealing fit, the pressure sensitive unit is electrically connected with the flexible circuit board, and the pressure sensitive unit is used for detecting the pressure of the refrigerant.

In one embodiment, a second sealing structure is arranged between the elastic sealing fixing piece and the seat body, one end of the second sealing structure is connected with the elastic sealing fixing piece, the other end of the second sealing structure protrudes out of the elastic sealing fixing piece and abuts against the seat body, and the second sealing structure is in sealing fit with the seat body.

In one embodiment, the second seal structure and the resilient seal mount are an integrally formed structure.

In one embodiment, a first sealing structure is arranged between the elastic sealing fixing piece and the first step structure, one end of the first sealing structure is connected with the elastic sealing fixing piece, the other end of the first sealing structure protrudes out of the elastic sealing fixing piece and abuts against the first step structure, and the first sealing structure is in sealing fit with the first step structure.

In one embodiment, the first seal structure and the resilient seal mount are an integrally formed structure.

In one embodiment, the outer peripheral side of the connector is provided with a second step structure, and one end of the shell, which is far away from the temperature sensor, is bent and pressed against the second step structure.

In one embodiment, the elastic sealing fixing member is a rubber member, a silicone member, or a soft plastic member.

In one embodiment, the housing is an aluminum alloy member.

Compared with the prior art, the sensing test head provided by the application has the advantages that under the action of the compression force of the connector, the elastic sealing fixing piece can generate compression deformation (the compression amount is 5% -50%), and the elastic sealing fixing piece can also generate certain deformation resistance to the compression force, so that the elastic sealing fixing piece can form sealing fit (or interference fit) with the first step structure. Because the elastic sealing fixing piece is arranged between the first step structure and the connector, the elastic sealing fixing piece can seal and isolate the assembly cavity between the first step structure and the connector so as to prevent the refrigerant from entering the flexible circuit board on one side of the elastic fixing piece, which is away from the temperature sensor, and further prevent the flexible circuit board from being short-circuited.

Because the connector is applied with the pressing force to the elastic sealing fixing piece, under the action of the pressing force, no matter whether the elastic sealing fixing piece contracts or not, the elastic sealing fixing piece and the first step structure can always keep a tightly matched state, and therefore a constant sealing state between the elastic sealing fixing piece and the first step structure is ensured.

Further, under the action of the pressing force, the gap between the conductive pin and the elastic sealing fixing piece can be greatly compressed, so that refrigerant leakage can be prevented from occurring between the conductive pin and the elastic sealing fixing piece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following descriptions are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic diagram of a sensor test head according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a sensing test head according to an embodiment of the present application.

Reference numerals: 100. a housing; 110. an assembly chamber; 120. a first step structure; 200. a temperature sensor; 210. conductive pins; 220. a sheath; 300. a connector; 310. a second step structure; 400. a flexible circuit board; 500. an elastic sealing fixing member; 510. a first sealing structure; 520. a second sealing structure; 610. a base; 700. an external sealing structure.

Detailed Description

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Because the temperature of the temperature sensor needs to be collected and put into the refrigerant pipeline to be fully contacted with the refrigerant, the thermistor needs to be connected to an external connector through a flexible circuit board (FPC). In addition, the PIN of the temperature sensor is generally required to be pre-buried by injection molding, but because the shrinkage is generated after the injection molding part is molded and the thermal stress of the injection molding part made of plastic material is different from that of the PIN made of metal material, the contact surface of the PIN and the injection molding part is Mao Xifeng, so that the refrigerant is easy to leak.

Referring to fig. 1 and 2, in order to solve the problem that the refrigerant is easy to leak due to shrinkage of the injection molding part, the application provides a sensing test head, which comprises a housing 100, a temperature sensor 200, a connector 300, a flexible circuit board 400 and an elastic sealing fixing member 500, wherein the housing 100 is provided with an assembly cavity 110. Specifically, the material of the housing 100 is an aluminum alloy, but not limited thereto, and in other embodiments, the material of the housing 100 may be a copper alloy or an iron alloy, or even a novel nonmetallic material, which is not listed herein.

As shown in fig. 2, the temperature sensor 200 is disposed at one end of the assembly cavity 110 and at least partially protrudes out of the assembly cavity 110, and the temperature sensor 200 needs to measure the temperature of the refrigerant in real time, so that the temperature sensor 200 protrudes out of the assembly cavity 110 to facilitate the temperature sensor 200 to be in full contact with the refrigerant, and improve the measurement sensitivity and measurement accuracy of the temperature sensor 200. Further, in order to protect the temperature sensor 200, the sensing head further includes a sheath 220, and the sheath 220 is connected to one end of the housing 100 and is sleeved outside the temperature sensor 200.

The connector 300 is mounted to the other end of the mounting cavity 110. The connector 300 is used for transmitting measurement data of the sensing test head to the vehicle system or other control systems so as to analyze the measurement data of the sensing test head, and the connector 300 can be in clamping fit with an interface of the vehicle system so as to fix the connector 300.

Along the direction from the temperature sensor 200 to the connector 300, the elastic sealing fixture 500 and the flexible circuit board 400 are sequentially assembled in the assembly chamber 110, and the conductive pins 210 of the temperature sensor 200 are inserted into the elastic sealing fixture 500 and electrically connected to the flexible circuit board 400.

It should be noted that "penetrating" means that the conductive pin 210 of the temperature sensor 200 passes through the inside of the elastic sealing fixture 500, and thus, a perforation is left on the elastic sealing fixture 500.

As shown in fig. 2, the inner wall of the assembly cavity 110 is provided with a first step structure 120, and the first step structure 120 is located at a side of the elastic sealing fixture 500 facing away from the flexible circuit board 400, and the connector 300 can apply a pressing force to the elastic sealing fixture 500 toward the first step structure 120, so that the elastic sealing fixture 500 can seal off the assembly cavity 110 between the flexible circuit board 400 and the temperature sensor 200.

It should be noted that, the first step structure 120 is a structure machined on the inner wall of the housing 100, and the first step structure 120 and the housing 100 may be an integrally formed structure or a welded structure.

Specifically, the elastic sealing fixing member 500 is a rubber member, a silicone member, a soft plastic member, or other soft elastic materials, which are not illustrated herein.

The rubber material itself has good bonding characteristics with metal, and thus, the elastic sealing holder 500 can achieve a better sealing effect with the housing 100.

Further, the elastic sealing mount 500 is a low temperature resistant silicone rubber member, thus ensuring that the elastic sealing mount 500 maintains inherent characteristics (mainly elastic deformability) at low temperatures.

Under the action of the pressing force of the connector 300, the elastic sealing fixing member 500 may generate compression deformation (the compression amount is 5% -50%), and the elastic sealing fixing member 500 may also generate a certain deformation resisting action on the pressing force, so that the elastic sealing fixing member 500 may form a sealing fit (or an interference fit) with the first step structure 120. Because the elastic sealing fixing member 500 is disposed between the first step structure 120 and the connector 300, the elastic sealing fixing member 500 can seal and isolate the assembly cavity 110 between the first step structure 120 and the connector 300, so as to prevent the refrigerant from entering the flexible circuit board 400 on the side of the elastic fixing member facing away from the temperature sensor 200, thereby preventing the flexible circuit board 400 from being shorted.

Since the connector 300 applies a pressing force to the elastic sealing holder 500, the elastic sealing holder 500 and the first step structure 120 can always maintain a tightly fitted state regardless of whether the elastic sealing holder 500 is contracted or not by itself under the pressing force, thereby ensuring a constant sealing state between the elastic sealing holder 500 and the first step structure 120.

Further, the gap between the conductive pin 210 and the elastic sealing fixture 500 is also greatly compressed by the pressing force, thereby ensuring that no refrigerant leakage occurs between the conductive pin 210 and the elastic sealing fixture 500.

Further, in an embodiment, as shown in fig. 2, an annular first sealing structure 510 is disposed between the elastic sealing fixing member 500 and the first step structure 120, one end of the first sealing structure 510 is connected to the elastic sealing fixing member 500, the other end protrudes from the elastic sealing fixing member 500 and abuts against the first step structure 120, and the first sealing structure 510 is in sealing fit with the first step structure 120.

Through setting up first seal structure 510, can reduce the cooperation area between elastic seal mounting 500 and the first step structure 120, and then increase the pressure between first seal structure 510 and the first step structure 120, be favorable to improving the sealed effect between elastic seal mounting 500 and the first step structure 120.

Further, in one embodiment, as shown in fig. 2, the first sealing structure 510 and the elastic sealing fixture 500 are integrally formed. In this way, the assembling difficulty of the first sealing structure 510 is reduced, which is beneficial to the assembling and fixing of the first sealing structure 510.

In one embodiment, as shown in fig. 2, the outer peripheral side of the connector 300 is provided with a second step structure 310, and an end of the housing 100 away from the temperature sensor 200 is bent by a servo press and is pressed against the second step structure 310.

So, improved connector 300 and housing 100's joint strength, avoided connector 300 to break away from housing 100 to, through housing 100 crimping in second step structure 310, can make housing 100 exert the compacting force effect at crimping in-process butt joint connector 300, and then make compacting force transfer to elastic seal mounting 500, thereby improve the sealed effect of sensing test head greatly.

Further, in an embodiment, the connection between the housing 100 and the second step structure 310 is coated with glue to further enhance the connection strength of the two.

In an embodiment, as shown in fig. 2, the sensing test head further includes a pressure sensor, the pressure sensor is disposed between the connector 300 and the elastic sealing fixing member 500, the pressure sensor is electrically connected to the flexible circuit board 400, the elastic sealing fixing member 500 is provided with a through hole for communicating the pressure sensor with an external space, and the pressure sensor can detect the pressure of the refrigerant through the through hole.

Further, in order to prevent the refrigerant from entering the flexible circuit board 400 through the pressure sensitive element, in one embodiment, as shown in fig. 2, the pressure sensitive element includes a base 610 and a pressure sensitive unit, and the connector 300 is crimped to an end of the elastic sealing fixture 500, which is away from the temperature sensor 200, through the base 610, so that the base 610 and the elastic sealing fixture 500 are in sealing engagement, thereby preventing the refrigerant from entering the flexible circuit board 400 through a gap between the base 610 and the elastic sealing fixture 500.

Specifically, the base 610 is a circular ceramic core.

In an embodiment, as shown in fig. 2, an annular second sealing structure 520 is disposed between the elastic sealing fixing member 500 and the base 610, one end of the second sealing structure 520 is connected to the elastic sealing fixing member 500, and the other end protrudes from the elastic sealing fixing member 500 and abuts against the base 610, and the second sealing structure 520 is in sealing fit with the base 610.

By arranging the second sealing structure 520, the matching area between the elastic sealing fixing piece 500 and the seat body 610 can be reduced, so that the pressure intensity between the second sealing structure 520 and the seat body 610 is increased, and the sealing effect between the elastic sealing fixing piece 500 and the seat body 610 is improved.

Still further, in one embodiment, the second seal structure 520 and the elastic seal mount 500 are an integrally formed structure. Thus, the assembling difficulty of the second sealing structure 520 is reduced, and the second sealing structure 520 is facilitated to be assembled and fixed.

The pressure-sensitive unit is electrically connected to the flexible circuit board 400, and the pressure-sensitive unit is disposed at one end of the base 610 near the through hole, so as to be used for detecting the pressure of the refrigerant. It should be noted that the pressure sensitive unit is disposed in the cavity between the base 610 and the elastic sealing member 500, and the pressure sensitive unit is not affected by the pressing force of the connector 300.

It will be appreciated that a cavity is also provided between the housing 610 and the connector 300, the flexible circuit board 400 is disposed in the cavity, and the flexible circuit board 400 is not subjected to the pressing force of the connector 300.

To adapt to the space shape between the first step structure 120 and the base 610, the conductive pin 210 is bent at 90 degrees.

In one embodiment, as shown in FIG. 2, an external seal structure 700 is provided on the outer peripheral side of the housing 100 to improve the assembly tightness of the sensing test head.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be determined from the following claims.

Claims (10)

1. The sensing test head is characterized by comprising a shell (100), a temperature sensor (200), a connector (300), a flexible circuit board (400) and an elastic sealing fixing piece (500), wherein the shell (100) is provided with an assembly cavity (110), the temperature sensor (200) is arranged at one end of the assembly cavity (110) and at least partially extends out of the assembly cavity (110), and the connector (300) is arranged at the other end of the assembly cavity (110);

Along the direction from the temperature sensor (200) to the connector (300), the elastic sealing fixing piece (500) and the flexible circuit board (400) are sequentially assembled in the assembly cavity (110), and the conductive pins (210) of the temperature sensor (200) penetrate through the elastic sealing fixing piece (500) and are electrically connected with the flexible circuit board (400);

The inner wall of assembly chamber (110) is equipped with first step structure (120), first step structure (120) are located elastic seal mounting (500) deviate from one side of flexible circuit board (400), connector (300) can be right elastic seal mounting (500) are exerted towards first step structure (120) compressive force, so that elastic seal mounting (500) can seal and separate flexible circuit board (400) with assembly chamber (110) between temperature sensor (200).

2. The sensing test head according to claim 1, further comprising a pressure sensitive element, wherein the pressure sensitive element is disposed between the connector (300) and the elastic sealing fixture (500), and the pressure sensitive element is electrically connected to the flexible circuit board (400), the elastic sealing fixture (500) is provided with a through hole communicating the pressure sensitive element with an external space, and the pressure sensitive element can detect the pressure of the refrigerant through the through hole.

3. The sensing test head according to claim 2, wherein the pressure sensitive element comprises a base (610) and a pressure sensitive unit, the connector (300) is crimped to an end of the elastic sealing fixture (500) away from the temperature sensor (200) through the base (610) so as to be in sealing fit between the base (610) and the elastic sealing fixture (500), the pressure sensitive unit is electrically connected to the flexible circuit board (400), and the pressure sensitive unit is used for detecting the pressure of the refrigerant.

4. A sensing test head according to claim 3, characterized in that a second sealing structure (520) is arranged between the elastic sealing fixing member (500) and the base body (610), one end of the second sealing structure (520) is connected with the elastic sealing fixing member (500), the other end of the second sealing structure protrudes out of the elastic sealing fixing member (500) and abuts against the base body (610), and the second sealing structure (520) is in sealing fit with the base body (610).

5. The sensing test head of claim 4, wherein the second sealing structure (520) and the resilient sealing mount (500) are an integrally formed structure.

6. The sensing test head according to claim 1, wherein a first sealing structure (510) is arranged between the elastic sealing fixing piece (500) and the first step structure (120), one end of the first sealing structure (510) is connected with the elastic sealing fixing piece (500), the other end of the first sealing structure (510) protrudes out of the elastic sealing fixing piece (500) and abuts against the first step structure (120), and the first sealing structure (510) is in sealing fit with the first step structure (120).

7. The sensing test head of claim 6, wherein the first sealing structure (510) and the resilient sealing mount (500) are an integrally formed structure.

8. The sensing test head according to claim 1, wherein a second step structure (310) is provided on the outer peripheral side of the connector (300), and an end of the housing (100) remote from the temperature sensor (200) is bent and crimped to the second step structure (310).

9. The sensing test head according to claim 1, wherein the elastic sealing fixture (500) is a rubber, silicone or soft plastic piece.

10. The sensing test head according to claim 1, wherein the housing (100) is an aluminum alloy piece.