KR101897293B1 - 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 connecting board coupled to the sensor module, a spring having one end electrically connected to the connecting board, a housing accommodating the connecting board and the spring, and a spring mounted on the spring, And a blocking member configured to block the inflow path.

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.

Meanwhile, since the pressure sensor is formed by combining a plurality of parts, the airtightness is deteriorated. Particularly, foreign substances may be introduced into the pressure sensor through springs exposed to the outside in order to electrically communicate with the electronic control unit. When foreign substances are introduced into the pressure sensor, a contact failure between the spring and the terminal may occur or internal damage may occur.

According to the embodiments of the present invention, it is intended to provide a pressure sensor capable of preventing foreign substances from entering the inside of the pressure sensor by taking a spring.

Embodiments of the present invention are also 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 being accurately fastened to the terminals of various circuit boards.

The automotive pressure sensor according to the above-described embodiments of the present invention includes a sensor module, a connecting board coupled to the sensor module, a spring having one end electrically connected to the connecting board, a housing accommodating the connecting board and the spring, And a blocking member installed on the spring and configured to block a path through which the foreign matter flows along the spring.

According to one aspect, the blocking member may be installed such that the spring passes through the blocking member. In addition, the blocking member may be a single member that is simultaneously installed on the plurality of springs, or may be a plurality of members formed on the springs. Also, the blocking member may be formed by insert molding the spring, or by foaming the spring.

' 형태로 꺾여서 단차가 형성된 코일 스프링이고, 상기 스프링은 서로 동일한 위치에 단차가 형성될 수 있다. 상기 스프링을 안착시켜 고정시킬 수 있는 스프링 홀더가 구비된다. 여기서, 상기 스프링 홀더는, 상기 차단부재의 상부의 상기 스프링이 안착되는 상부 스프링 홀더 및 상기 차단부재의 하부의 상기 스프링이 안착되는 하부 스프링 홀더를 포함할 수 있다. 또는, 상기 스프링 홀더는, 상기 스프링의 단차 하부 부분이 안착되는 하부 스프링 홀더 및 상기 스프링의 단차 상부 부분이 수용되고, 상기 하부 스프링 홀더와 결합되어 상기 스프링의 외측을 지지하는 상부 스프링 홀더를 포함할 수 있다. 그리고 상기 하우징은, 상기 접속기판과 상기 스프링을 수용하는 이너 프레임 및 상기 이너 프레임을 수용하는 커버 프레임을 포함하여 구성될 수 있다.According to one aspect, the spring may be a coil spring. In addition, the spring may be disposed on different straight lines or on different planes, rather than on both straight ends. For example,

', And the springs may be formed at the same position with respect to each other. And a spring holder for holding and fixing the spring. Here, the spring holder may include an upper spring holder on which the spring on the upper portion of the blocking member is seated, and a lower spring holder on which the spring is seated on the lower portion of the blocking member. Alternatively, the spring holder may include a lower spring holder on which a step lower portion of the spring is seated, and an upper spring holder which receives the upper portion of the step of the spring and which is coupled with the lower spring holder to support the outer side of the spring . The housing may include an inner frame for receiving the connecting board and the spring, and a cover frame for receiving the inner frame.

As described above, according to the embodiments of the present invention, since the blocking member is provided on the spring to prevent the foreign matter from entering the inside of the pressure sensor by the spring, contact instability and internal damage of the spring and the connecting board .

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 a cross-sectional view of a pressure sensor according to another embodiment of the present invention.
5 is an exploded perspective view of the pressure sensor of Fig.

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 5. 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. 4 is a sectional view of the pressure sensor 10 according to another embodiment of the present invention, and FIG. 5 is an exploded perspective view of the pressure sensor 10 of 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 blocking member 18. And a spring holder (16) for supporting the spring (15).

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 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 the terminals of the electric equipment, the spring protector 13 is removed and then 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. 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.

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.

Here, 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 terminal 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.

In addition, the spring 15 may be a linear coil spring which is commonly used as shown in Figs.

Here, since the spring 15 receives a force along the longitudinal direction, the spring holder 16 is formed to receive the spring 15 so as to prevent buckling of the spring 15. The spring holder 16 may comprise an upper spring holder 161 for receiving and supporting the upper portion of the spring 15 and a lower spring holder 162 for supporting the lower portion of the spring 15. A guide hole 1611 is formed in the upper spring holder 161 to receive and accommodate the upper portion of the spring 15. A lower portion of the lower spring holder 162 is inserted into a guide hole 1621 may be formed.

The upper spring holder 161 and the lower spring holder 162 may be coupled to each other. For example, a coupling protrusion 1612 protruding at a predetermined height is formed in a central portion of the upper spring holder 161, and a coupling hole 1622 corresponding to the coupling protrusion 1612 is formed in the lower spring holder 162 The coupling protrusion 1612 of the upper spring holder 161 is inserted into the coupling hole 1622 of the lower spring holder 162 so that the upper spring holder 161 and the lower spring holder 162 are engaged. Although the coupling protrusion 1612 is formed in the upper spring holder 161 and the coupling hole 1622 is formed in the lower spring holder 162 in the present embodiment, the present invention is not limited to the drawings , The positions of the engaging projections 1612 and the engaging holes 1622 can be changed. The coupling means between the upper spring holder 161 and the lower spring holder 162 as well as the coupling projection 1612 and the coupling hole 1622 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, 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 a single member provided on the four springs 15 as shown in the figure. Alternatively, the blocking member 18 may be formed as a separate member separately provided to each spring 15. The shape of the blocking member 18 is not limited to that shown in the drawings. The blocking member 18 may have substantially various shapes as long as it can block the path through which the foreign matter is introduced by the spring 15.

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 .

Although the spring holder 16 has been described as being composed of the upper spring holder 161 and the lower spring holder 162 in the above-described embodiment, the present invention is not limited to the drawings, As shown in FIG. Further, the shape of the spring holder 16 can be changed substantially as long as it can receive and support the spring. In the case where the spring holder 16 is formed of one piece, the blocking member 18 is interposed between the spring holder 16 and the connecting board 14 so as to effectively prevent foreign matter from entering the spring 15. [ .

' 형태로 꺾여서 단차부(251)가 형성된 형상일 수 있다. 여기서, 도 4와 도 5를 참조하면, 스프링(25)은 단차부(251)가 형성되어 있기 때문에 상부와 하부에서 스프링(25) 사이의 간격을 다르게 형성할 수 있으므로, 접속기판(14)의 단자 위치에 유연하게 대응할 수 있다.On the other hand, the spring 15 may be a linear coil spring which is commonly used as shown in Figs. Alternatively, as shown in Figs. 4 and 5, the spring 25 may have a length of '

'So that the step 251 is formed. 4 and 5, since the step 251 is formed in the spring 25, the gap between the spring 25 and the spring 25 can be different from that of the spring 25, It is possible to flexibly cope with the terminal position.

In the embodiment described below, the same names and reference numerals are used for elements substantially the same as the embodiments described in Figs. 1 to 3, and redundant explanations are omitted.

' 형태로 꺾여서 단차부(251)가 형성된 스프링(25)을 포함하여 구성된다. 또한, 하우징(12)에서 센서모듈(11)이 구비된 쪽과 반대쪽 단부에는 스프링(25)이 스프링 홀더(16) 외측으로 돌출된 단부를 수용하여 변형을 방지하는 스프링 프로텍터(spring protect)(13)가 구비된다. 또한, 하우징(12) 내부에는 밀폐를 위한 오링(o-ring)(17)이 구비될 수 있다.The pressure sensor 10 includes a sensor module 11 and a connecting board 14, a housing 12, a spring holder 16,

And a spring 25 having a stepped portion 251 formed therein. A spring protector 13 for receiving an end of the spring protruded outside the spring holder 16 to prevent deformation of the spring protector 13 from the end of the housing 12 opposite to the sensor module 11, . In addition, an o-ring 17 for sealing may be provided inside the housing 12.

For example, the housing 12 is composed of an inner frame 122 and a cover frame 121.

The spring 25 is provided to be electrically connected to the connection board 14 and the number and arrangement of the springs 25 are determined so as to correspond one-to-one to terminals (not shown) provided on the connection board 14. 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 형성될 수 있다. 그러나 스프링(25)의 형상이 도면에 의해 한정되는 것은 아니며, 스프링(25)의 양쪽 단부가 일직선 상이 아니게 배치되는 다양한 형상을 가질 수 있다.Here, the spring 25 contacts the terminal on the connection board 14 and is coupled to the connection board 14 in a state in which a predetermined elastic force is applied so that the spring 25 can be stably connected to the connection board 14 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 14 in a compressed state in the longitudinal direction. In addition,

And the step portion 251 may be formed. However, the shape of the spring 25 is not limited to the drawings, and may have various shapes in which both ends of the spring 25 are arranged not in a straight line.

The spring holder 16 is formed to receive the spring 25 to prevent buckling of the spring 25 when the spring 25 is subjected to a force in the longitudinal direction. The spring holder 16 includes an upper spring holder 161 for receiving and supporting the upper portion of the step 251 of the spring 25 and a lower spring holder 16 for supporting the lower portion of the step 251 of the spring 25. [ (162).

The upper spring holder 161 is formed with a guide hole 1611 into which the upper part of the step 251 of the spring 25 is inserted and the lower spring holder 162 has a step 251 of the spring 25 on the outer circumferential surface, And a lower portion. That is, the step 251 of the spring 25 and the lower part of the step 251 are mounted on the upper surface and the side surface 1621 of the lower spring holder 162 and the upper part of the step 251 of the spring 25 The buckling of the spring 25 is prevented by being accommodated in the guide hole 1611 of the upper spring holder 161.

Further, means for fixing the position of the spring 25 mounted on the lower spring holder 162 is provided. For example, the upper spring holder 161 is formed with a spring guide 1613 at the end thereof, and the spring guide 1613 protrudes downward from the upper spring holder 161 to be engaged with the side surface 1621 of the lower spring holder 162, So that the outer surface of the spring 25 can be supported from the outside. The spring guide 1613 may have a semicylindrical shape so as to receive the spring 25 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 . 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. In addition, the coupling means between the upper spring holder 161 and the lower spring holder 162 can be varied substantially.

On the other hand, a blocking member 18 may be provided to prevent foreign matter from entering the spring 25. For example, a blocking member 18 is provided through a plurality of springs 25. 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 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 foreign matter flows along the spring 25. [ .

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 (11)

Sensor module;
A connection board coupled to the sensor module;
A plurality of springs, one end of which is electrically connected to the connecting board;
A housing for receiving the connection substrate and the spring;
A blocking member formed integrally with a part of the plurality of springs in a longitudinal direction thereof to integrally form a plurality of springs inserted therethrough to block a path through which the foreign matter flows along the springs; And
A spring holder including an upper spring holder on which an upper portion of the spring is seated above the blocking member and a lower spring holder on which a lower portion than the blocking member is seated;
.
delete delete delete The method according to claim 1,
Wherein each spring is a coil spring.
6. The method of claim 5,
Wherein each spring is disposed on a straight line or on a different plane, with both ends being different from each other.
The method according to claim 6,
Each of the above-

Wherein the spring is a coil spring having a step formed by folding in a " shape "
delete delete 8. The method of claim 7,
Wherein the lower spring holder has a step lower portion of each spring seated thereon,
Wherein the upper spring holder includes a step upper portion of each spring and is coupled with the lower spring holder to support the outer side of the spring.
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;
.

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