KR102000293B1 - Pressure sensor - Google Patents

Abstract

A pressure sensor capable of stably maintaining the connection state with the connection board is described. The pressure sensor includes a sensor module, a connection board coupled to the sensor module, a spring having one end electrically connected to the connection board, a spring disposed at a straight line or a plane at both ends different from each other, And a housing for receiving the spring.

Description

Pressure sensor {PRESSURE SENSOR}

The present invention relates to a pressure sensor for an automobile installed in a hydraulic block of an anti-lock brake system of an automobile and contacting a circuit board of an electronic control device and sensing a brake fluid pressure.

Generally, the vehicle is equipped with a brake system for deceleration or braking. The brake system includes a pedal for transmitting the operation force of the user, a booster and a master cylinder connected to the pedal to form a braking oil pressure, a booster and a wheel brake for braking the vehicle's wheels according to the braking hydraulic pressure inputted from the master cylinder .

When the braking force is generated by the driver pressing the brake pedal or when the braking pressure is larger than the road surface condition or the frictional force at the wheel brake generated by the braking pressure is greater than the braking force generated at the tire or the road surface, A slip phenomenon occurs. And, when the brake is operated in this way, the steering apparatus is locked and can not be steered in a desired direction.

Conventionally, an anti-lock brake system (ABS) has been developed which electronically controls the brake force to enable steering when a slip phenomenon occurs. The anti-lock brake system includes a hydraulic unit equipped with a plurality of solenoid valves for adjusting braking hydraulic pressure transmitted to the wheel brake side, a low-pressure accumulator and a high-pressure accumulator, and an electronic control unit An electronic control unit (ECU). The hydraulic block is provided with a pressure sensor for detecting the brake operating pressure generated in the master cylinder in proportion to the brake pedal depression of the driver and transmitting the brake operating pressure to the electronic control unit as an electrical signal. The electronic control unit controls the brake operation in accordance with an electrical signal transmitted from the pressure sensor.

A conventional pressure sensor is mounted on a machining hole formed at the tip of a master cylinder and is electrically connected to a circuit board of an electronic control unit through a separate connector and a cable. However, when the braking force is generated by the driver's pressing force, the pressure sensor is moved by the minute vibration. At this time, the pressure sensor is elastically pressed by a spring and electrically connected to the circuit board. However, in the conventional pressure sensor, when a large vibration is inputted, there is a problem that it falls off the circuit board of the electronic control device, the connection between the terminals of the circuit board is not precisely performed, the contact failure may occur, there is a problem.

In addition, the conventional pressure sensor is configured to electrically connect the terminals of the circuit board and the terminals of the electronic control device to each other by a linear spring. However, in the case of changing the terminal position of the electronic control unit, in order to electrically connect with the linear type spring, the terminal position of the circuit board must be changed to the same axis as the terminal of the electronic control unit. In this case, There is a problem that the degree of freedom of design is low because the component itself needs to be changed according to the circuit board.

According to the embodiments of the present invention, there is provided a pressure sensor having a degree of freedom in design so that even if a terminal position of a circuit board is changed, the part can be electrically connected to the electronic control unit without being replaced.

In addition, according to the embodiments of the present invention, it is intended to provide a pressure sensor capable of preventing a contact failure from occurring with a circuit board of an electronic control device, and capable of accurately fastening to terminals of various circuit boards.

' 형태로 꺾여서 단차부가 형성된 복수의 스프링 및 상기 센서모듈과 상기 접속기판 및 상기 복수의 스프링을 수용하는 하우징을 포함한다.The automotive pressure sensor according to the above-described embodiments of the present invention includes a sensor module, a connection board coupled to the sensor module, and one end electrically connected to the connection board,

And a housing for receiving the sensor module, the connection board, and the plurality of springs.

' 형태로 꺾여서 단차부가 형성된다. 또한, 상기 복수의 스프링은 서로 동일한 위치에 단차부가 형성될 수 있다. 또한, 압력센서는 상기 접속기판을 수용하는 이너 프레임 및 상기 이너 프레임과 상기 복수의 스프링을 수용하는 커버 프레임을 포함할 수 있다. 여기서, 상기 복수의 스프링이 관통되도록 고정 지지하는 차단부재가 더 구비되고, 상기 차단부재는 상기 복수의 스프링을 따라 이물질이 유입되는 경로를 차단시키도록 형성될 수 있다.According to one aspect,

And the stepped portion is formed. In addition, the plurality of springs may be formed with stepped portions at the same positions. Further, the pressure sensor may include an inner frame for receiving the connecting board, and a cover frame for receiving the inner frame and the plurality of springs. Here, the blocking member may further include a blocking member for fixing and supporting the plurality of springs so as to penetrate therethrough, and the blocking member may be formed to block a path through which the foreign matter flows along the plurality of springs.

According to one aspect of the present invention, a lower spring holder, in which a lower portion than the stepped portion of each spring is seated, an upper portion of which is positioned above the stepped portion of the respective springs, is coupled with the lower spring holder, And the upper spring holder is formed at its lower end with a fastening hook for fastening, and the fastening portion for fastening the fastening hook can be formed in the housing.

As described above, according to the embodiments of the present invention, since the stepped portion is formed in the middle of the spring, when the plurality of springs are arranged in parallel, the gap between the upper end portions and the lower end portions can be formed differently So that it can stably contact the connecting board even if the terminal position is changed.

Further, according to the embodiments of the present invention, by configuring the spacing at the upper end portion of the spring and the spacing at the lower end portion differently, even when the terminal position of the connecting board is changed, It is possible to cope with various electronic control devices which are designed to be applied to a limited installation space according to the type of vehicle through an existing production line.

1 is a perspective view of a pressure sensor according to an embodiment of the present invention.
2 is a cross-sectional view of the pressure sensor of Fig.
3 is an exploded perspective view of the pressure sensor of FIG.
4 is an exploded perspective view of a pressure sensor according to another embodiment of the present invention.
5 is a perspective view of a pressure sensor according to another embodiment of the present invention.
6 is a cross-sectional view of the pressure sensor of Fig.
7 is an exploded perspective view of the pressure sensor of FIG.
8 is an exploded perspective view of a pressure sensor according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, but the present invention is not limited to or limited by the embodiments. In describing the embodiments, a detailed description of well-known functions or constructions may be omitted so as to clarify the gist of the present invention.

Hereinafter, a pressure sensor according to embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8. FIG.

1 is a perspective view of a pressure sensor 10 according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the pressure sensor 10 of Fig. 1, and Fig. 3 is a sectional view of the pressure sensor 10 of Fig. Fig.

1 to 3, the pressure sensor 10 includes a sensor module 11, a connecting board 14, a spring 15, a housing 12, and a spring holder 16.

The sensor module 11 is provided with a connection board 14 such that various sensor gauges for sensing pressure are mounted and connected to the end of the sensor module 11 where the sensor is mounted. Here, the detailed description of the technical structure and functions of the sensor module 11 and the connection board 14 will be omitted.

The spring 15 is provided to be electrically connected to the connection board 14 and the number and arrangement of the springs 15 are determined so as to correspond one-to-one with terminals (not shown) provided on the connection board 14. For example, although four springs 15 are arranged in a square shape, the present invention is not limited to the drawings, and the number of the springs 15 and the arrangement thereof may be substantially And can be variously changed.

' 형태로 꺾여서 단차부(151)가 형성된다. 이와 같이 단차부(151)를 형성함으로써 스프링(15)은 길이 방향에 대해서 상단부와 하단부의 양쪽 단부가 일직선 상이 아니게 배치된다. 그러나 본 발명이 도면에 의해 한정되는 것은 아니며, 스프링(15)의 형상은 일 직선 형상이 아니고, 양쪽 단부가 일 직선상에 배치되지 않는 형태라면, 단차부(151)의 형상은 실질적으로 다양한 형상을 가질 수 있다.On the other hand, the spring 15 contacts the terminal on the connecting board 14 and is coupled to the connecting board 14 in a state in which a predetermined elastic force is applied so that the spring 15 can be stably connected to the connecting board 14 even in a vibrating state. For example, the spring 15 is a coil spring having a predetermined length and can be coupled to the connecting board 14 in a compressed state in the longitudinal direction. A plurality of the springs 15 are arranged in parallel to each other in the longitudinal direction thereof, and the spacing between the upper ends of the respective springs 15 is different from the spacing between the lower ends. For example, the spring 15 may have a "

'So that the step portion 151 is formed. By forming the step portion 151 as described above, the spring 15 is disposed such that both end portions of the upper end portion and the lower end portion in the longitudinal direction are not straight. However, the present invention is not limited to the drawings, and if the shape of the spring 15 is not a straight line shape but the both ends are not disposed on a straight line, the shape of the step portion 151 may be substantially different Lt; / RTI >

Since the stepped portion 151 is formed in the spring 15, if a plurality of the springs 15 are arranged in parallel, the gap between the upper end portions and the lower end portions can be formed differently. Therefore, even when the terminal position of the connecting board 14 is changed, it can be flexibly coped with. Specifically, the spring 15 is a member in which one end is electrically connected to the connection substrate 14 and the other end is electrically connected to the outside. Since the stepped portion 151 is formed on the spring 15 according to the present embodiment, the stepped portion of the spring 15 It is possible to connect to the terminal of the connecting board 14. [ Therefore, it is possible to connect the spring 15 according to the terminal position of the connecting board 14 without replacing the parts such as the spring holder 16, and the degree of freedom of design is increased.

The housing 12 accommodates the sensor module 11, the connecting board 14 and the spring 15 to form the external appearance of the pressure sensor 10 and the housing 12 is provided with the sensor module 11, And a spring protect 13 is provided at the opposite end. Here, the spring protector 13 serves to receive a portion of the spring 15 protruding from the spring holder 16 and prevent the spring 15 from being deformed. When the spring 15 and the pressure sensor 10 are mounted on a device to be mounted (for example, an electronic control device of an automobile or the like), the spring protector 13 is removed and mounted. Inside the housing 12, a spring holder 16 for fixing and supporting a spring 15 is provided. That is, the pressure sensor 10 includes a sensor module 11, a connection substrate 14, and a spring 15 mounted on the spring holder 16 in a stacked manner in the housing 12. An o-ring 17 is provided on one side of the housing 12. Here, the detailed description of the technical structure and functions of the sensor module 11 and the connection board 14 will be omitted.

The housing 12 is composed of an inner frame 122 and a cover frame 121. The cover frame 121 accommodates components such as the inner frame 122 and the springs 15 to form the appearance of the pressure sensor 10. [ The inner frame 122 is provided between the sensor module 11 and the connecting board 14 and serves to maintain the interval so that the connecting board 14 is spaced apart from the upper end of the sensor module 11 by a predetermined distance. Further, the inner frame 122 is provided with a structure for fixing the connecting board 14 so as to maintain a predetermined position with respect to the connecting board 14. For example, a fastening flange 1222 to be fastened to the connecting board 14 may be formed at an end of the inner frame 122 to which the connecting board 14 is coupled. The fastening flange 1222 may protrude from the end of the inner frame 122 to a predetermined height and may be fastened to the outer circumferential surface of the connecting board 14 by a plurality of (for example, four) fasteners. However, the present invention is not limited to the drawings, and the shape of the inner frame 122 and the fastening means of the inner frame 122 and the connecting board 14 can be substantially varied.

The housing 12 can be fixed to the sensor module 11 by welding. 2, an end portion 1211 coupled with the sensor module 11 in the inner frame 122 and an end portion 1221 coupled with the sensor module 11 in the cover frame 121 are connected to the sensor module 11, respectively, And fixed to the module 11 by welding.

A spring holder 16 is formed to receive the spring 15 so as to prevent buckling of the spring 15 because the spring 15 is a coil spring having a predetermined length and receives a force along the longitudinal direction. The spring holder 16 is composed of an upper spring holder 161 for receiving and supporting the upper portion of the spring 15 above the step portion 151 and a lower spring holder 162 for supporting the lower portion than the step portion 151. A guide hole 1611 into which the spring 15 is inserted is formed in the upper spring holder 161. [ The lower spring holder 162 is formed so that the step portion 151 of the spring 15 is mounted on the outer peripheral surface. That is, the stepped portion 151 of the spring 15 and the lower portion of the stepped portion 151 are mounted on the upper surface and the side surface 1621 of the lower spring holder 162 to prevent buckling of the spring 15. In addition, means for preventing buckling and deformation to fix the position of the spring 15 mounted on the lower spring holder 162 is provided. The upper spring holder 161 is formed with a spring guide 1613 at an end thereof and the spring guide 1613 protrudes downward from the upper spring holder 161 and is coupled to the outside of the side surface 1621 of the lower spring holder 162 The outer surface of the spring 15 can be supported from the outside. Further, the spring guide 1613 may have a semi-cylindrical shape so as to receive the spring 15 therein and to engage with the side surface 1621 of the lower spring holder 162.

Further, the upper spring holder 161 and the lower spring holder 162 are formed to be fastenable to each other. For example, a coupling protrusion 1622 protruding at a predetermined height is formed in a central portion of the lower spring holder 162, and a coupling hole 1612 corresponding to the coupling protrusion 1622 is formed in the upper spring holder 161 . The coupling protrusion 1622 of the lower spring holder 162 is inserted into the coupling hole 1612 of the upper spring holder 161 so that the upper spring holder 161 and the lower spring holder 162 are engaged. Although the coupling protrusion 1622 is formed in the lower spring holder 162 and the coupling hole 1612 is formed in the upper spring holder 161 in the present embodiment, the present invention is not limited to the drawings , The positions of the engaging projections 1622 and the engaging holes 1612 can be changed. The coupling means between the upper spring holder 161 and the lower spring holder 162 as well as the coupling projection 1622 and the coupling hole 1612 can be changed substantially in various ways.

On the other hand, a blocking member 18 may be provided to prevent foreign matter from entering the spring 15. For example, as shown in FIG. 4, a blocking member 18 is provided through a plurality of springs 15. In addition, the blocking member 18 may be interposed between the upper spring holder 161 and the lower spring holder 162. Here, the blocking member 18 may be formed of one member that passes through all four springs 15. Or the blocking member 18 may be a member individually installed in each spring 15. Further, the shape of the blocking member 18 is not limited to the drawings, and may have substantially various shapes.

The blocking member 18 may be formed by a method such as insert molding or forming on the spring 15 and may be practically variously modified as long as it can block the path through which the foreign matter flows along the spring 15 .

5 to 8 are views for explaining a pressure sensor 20 according to another embodiment of the present invention. 5 is a perspective view of a pressure sensor 20 according to another embodiment of the present invention, Fig. 6 is a sectional view of the pressure sensor 20 of Fig. 5, and Fig. 7 is a sectional view of the pressure sensor 20 of Fig. It is a perspective view.

5 to 7, the pressure sensor 20 includes a sensor module 21, a connecting board 24, a spring 25, and a housing 22. The embodiments described below use the same names for components substantially the same as the embodiments described in Figs. 1 to 3, and redundant explanations are omitted.

The sensor module 21 is equipped with a connecting substrate 24 such that various sensor gauges for sensing the pressure are mounted and connected to the end of the sensor module 21 where the sensor is mounted. Here, the detailed description of the technical structure and functions of the sensor module 21 and the connection board 24 will be omitted.

The spring 25 is provided to be electrically connected to the connection board 24 and the number and arrangement of the springs 25 are determined so as to correspond one-to-one with terminals (not shown) provided on the connection board 24. For example, although four springs 25 are arranged in a square shape, the present invention is not limited to the drawings, and the number of the springs 25 and the arrangement thereof may be substantially And can be variously changed.

' 형태로 꺾여서 단차부(251)가 형성된다. 스프링(25)은 단차부(251)가 형성되어 있기 때문에, 복수의 스프링(25)을 병렬로 배치하면 상단부와 하단부의 간격을 서로 다르게 형성할 수 있으므로, 접속기판(24)의 단자 위치에 유연하게 대응할 수 있다.On the other hand, the spring 25 contacts the terminal on the connecting board 24 and is coupled to the connecting board 24 in a state in which a predetermined elastic force is applied so that the spring 25 can be stably connected to the connecting board 24 even in a vibrating state. For example, the spring 25 is a coil spring having a predetermined length and can be coupled to the connecting board 24 in a compressed state in the longitudinal direction. A plurality of springs 25 are provided, and are arranged in parallel to each other in the longitudinal direction. Accordingly, the distance between the upper end portions and the lower end portions of the spring 25 are different from each other. For example, the spring 25 may have a "

'So that the step 251 is formed. Since the step 251 is formed in the spring 25, if the plurality of springs 25 are arranged in parallel, the gap between the upper end and the lower end can be made different from each other, .

The housing 22 accommodates the sensor module 21, the connecting board 24 and the springs 25 to form an outer appearance of the pressure sensor 20, and the housing 22 is provided with the sensor module 21 And a spring protector 23 is provided at the opposite end. Inside the housing 22, a spring holder 26 for fixing and supporting a spring 25 is provided. That is, the pressure sensor 20 is coupled with the sensor module 21, the connecting board 24, and the spring 25 mounted on the spring holder 26 in this order in the housing 22. The housing 22 can be fixed to the sensor module 21 by welding.

The housing 22 is formed with at least one seating flange 221 on which the connecting board 24 is mounted and which is spaced apart from the connecting board 24 by a predetermined distance. For example, the seating flange 221 is formed at a predetermined height from the predetermined height of the housing 22 toward the inside. The present invention is not limited to the drawings, and the number, height, and shape of the mounting flange 221 may be arbitrarily set in consideration of the number of mounting flanges 221, And may be practically variously modified. The seating flange 221 may be integrally formed with the housing 22 and may be formed by punching the housing 22 and bending the punched portion inward. Such a process can simplify the structure of the housing 22, simplify the process, and reduce the cost.

The opening formed when the seating flange 221 is formed in the housing 22 becomes a fastening part 222 which can be fastened to the spring holder 26. Since the fastening part 222 is formed as an opening in the housing 22, an o-ring 27 for sealing the fastening part 222 opened to seal the pressure sensor 20 is provided . The O-ring 27 is formed in a ring shape having a predetermined thickness and a sealing portion 271 of a predetermined size is formed to seal the fastening portion 222. The O-ring 27 is formed between the connection board 24 and the lower spring holder 262 . 6, the connecting board 24 is mounted on the mounting flange 221 and the O-ring 27 is mounted on the upper surface of the connecting board 24 to seal the inside of the pressure sensor 20 , The sealing portion (271) of the O-ring (27) is closed to seal the pressure sensor (20).

A spring holder 26 is formed to receive the spring 25 so as to prevent buckling of the spring 25 because the spring 25 is a coil spring having a predetermined length and receives a force along the longitudinal direction. The spring holder 26 includes an upper spring holder 261 for receiving and supporting the upper portion of the step 251 of the spring 25 and a lower spring holder 262 for supporting the lower portion of the step 251 of the spring 25 .

The upper spring holder 261 is formed with a guide hole 2611 through which the upper part of the step 25 of the spring 25 is inserted and a coupling hole 2612 formed at the center thereof with the lower spring holder 262 . The lower spring holder 262 is formed with a guide hole 2621 through which the lower portion of the lower spring holder 262 is inserted than the stepped portion 251 of the spring 25. The center of the lower spring holder 262 is engaged with the coupling hole 2612 of the upper spring holder 261, (Not shown).

Here, the upper spring holder 261 and the lower spring holder 262 are formed to be fastenable to each other. For example, a coupling protrusion 2623 protruding at a predetermined height is formed in a central portion of the lower spring holder 262, and a coupling hole 2612 corresponding to the coupling protrusion 2623 is formed in the upper spring holder 261 . The engaging projections 2623 of the lower spring holder 262 are inserted into the engaging holes 2612 of the upper spring holder 261 and engaged with each other.

The spring 25 is mounted on the upper surface of the lower spring holder 262 so that the step 251 is spaced apart from the guide hole 2611 of the upper spring holder 261 and the lower spring holder 262 of the lower spring holder 262 by the length of the step 251 The guide holes 2621 are formed to be shifted from each other. In order to keep the guide hole 2621 of the upper spring holder 261 and the guide hole 2621 of the lower spring holder 262 from misalignment, a guide inserted into the guide hole 2611 of the upper spring holder 261 A projection 2622 is formed. That is, as shown in Fig. 6, the guide projection 2622 is inserted into the guide hole 2611 of the upper spring holder 261.

At the end of the upper spring holder 261, there is formed a coupling hook 2613 which is coupled to the coupling part 222 of the housing 22. For example, the fastening hook 2613 is formed at a predetermined height at the end of the upper spring holder 261. A groove 2624 is formed in a side surface of the lower spring holder 262 so that the fastening hook 2613 can be fastened to the fastening portion 222 in a state where the upper spring holder 261 is coupled to the lower spring holder 262 .

Although the upper hook holder 261 and the housing 22 are coupled to each other by the fastening hook 2613 in the present embodiment, the upper hook holder 261 and the housing 22 ) Can be changed substantially in various ways.

5 to 7, the blocking member 28 may be provided to prevent foreign matter from entering the spring 25. For example, as shown in FIG. 8, a blocking member 28 is provided through a plurality of springs 25. In addition, the blocking member 28 may be interposed between the upper spring holder 261 and the lower spring holder 262. Here, the blocking member 28 may be formed of a single member that passes through all four springs 25, or may be a member separately provided to each of the springs 25. In addition, the shape of the blocking member 28 is not limited to the drawings, and may have substantially various shapes. Here, the blocking member 28 may be formed by a method such as insert molding or forming on the spring 25, and may be practically variously modified as long as it can block the path through which the foreign matter flows along the spring 25. [ .

According to the embodiments, even if the terminal position of the connecting board is changed, it is possible to flexibly cope with the replacement without replacing the spring or the parts by arranging the gap at one end of the spring and the gap at the other end differently. Accordingly, the pressure sensor according to the present embodiments can cope with various electronic control devices designed to be applied to a limited installation space according to vehicle type through existing production lines.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

10: Pressure sensor
11: Sensor module
12: Housing
121: Cover frame
122: inner frame
13: Spring protect
14:
15: spring
151:
16: spring holder
161: Upper spring holder
162: Lower spring holder
17: O-ring
18:

Claims (9)

A sensor module to which various sensor gauges are attached;
A connection board coupled to the sensor module;
A spring whose one end is electrically connected to the connecting board, the other end is electrically connected to the outside, and the stepped portion is formed along the longitudinal direction so that both ends of the spring are not positioned in a straight line with respect to the longitudinal direction; And
A housing for receiving the sensor module, the connection board, and the spring;
/ RTI >
Wherein a plurality of said springs are provided,
Wherein the plurality of springs are arranged in parallel with each other in the longitudinal direction so that a distance between upper ends of the respective springs and an interval between the lower ends are different from each other.
The method according to claim 1,
The stepped portion may be formed so that each of the springs extends in the longitudinal direction,

'Shaped pressure sensor.
The method according to claim 1,
Wherein the plurality of springs have stepped portions formed at the same position with respect to each other.
delete The method according to claim 1,
The housing includes:
An inner frame for accommodating the connecting board; And
A cover frame for accommodating the inner frame and the plurality of springs;
.
The method according to claim 1,
And a blocking member penetrating the spring to block a path through which the foreign matter flows along the plurality of springs.
delete The method according to claim 6,
Wherein the blocking member is one member that is simultaneously installed on the plurality of springs, or a plurality of members that are respectively formed on the plurality of springs.
The method according to claim 1,
A lower spring holder in which a lower portion of the spring is seated below the step portion; And
An upper spring holder having an upper portion above the stepped portion of each spring, a lower spring holder coupled to the lower spring holder and having a fastening hook for fastening at a lower end thereof;
Lt; / RTI >
Wherein the housing has a fastening portion to be fastened to the fastening hook.

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