JP2017120219A - Pressure detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure detector for detecting a pressure of fluid, which reduces the number of components by making connection between a connector and a housing easy, and which improves sealability between the connector and the housing.SOLUTION: A pressure detector 1 includes: a pressure port 10 into which fluid is introduced; a pressure sensor 20 provided at a pressure receiving part 15 of the pressure port 10; a resin connector 40 including connector terminals 41 which are connected to the pressure sensor 20; and a housing 50 which is connected to the connector 40 and the pressure port 10, and which stores the pressure sensor 20. The housing 50 includes through holes 53 as engaging parts which are embedded in the connector 40 so as to engage with the connector 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pressure detection device that detects the pressure of a fluid.

  Medium- and high-pressure sensors are used for environmental protection and fuel efficiency improvement of automobiles. The medium / high pressure sensor measures, for example, engine oil pressure, variable valve oil pressure, power steering pressure, in-cylinder injection (DI) pressure, brake oil pressure, or pressure of the working fluid in the suspension, transmission, and air conditioner. The medium-high pressure sensor is a pressure detection device that is attached to various devices to be measured and measures medium-high pressure, for example, about several MPa to several hundred MPa.

  As an example of such a pressure detection device, an invention relating to a sensor device including a pressure measurement cell is disclosed (see Patent Document 1 below). This sensor device has a pressure measuring cell, a sensor circuit, an electronic evaluation circuit connected to the sensor circuit, and an equipment connector. The pressure measurement cell has a measurement diaphragm, and the sensor circuit is directly attached to the measurement diaphragm. The device connector is contact-connected to the sensor circuit and the evaluation circuit. The casing of this sensor device consists of a crested tube piece, a hexagonal casing, and an equipment connector. The hexagon casing and the equipment connector are fixedly fitted through packing or other joining methods (see claim 1, paragraph 0019, FIG. 1 and the like).

  As another example of the pressure detection device, a combined fluid pressure and temperature sensor device is known (see Patent Document 2 below). This sensor device has a housing formed of a metal material and an electrically insulating connector. The housing has a first end having a threaded portion on the outside and forming a fluid receiving port on the inside, a side wall having a hexagonal shape, and a thinned remote end wall portion. Yes. The connector has an end housed within an open end formed by the side wall of the housing. The remote end wall portion of the housing is deformed inward and connected to the connector in a form that clamps the end of the connector via a gasket (see paragraphs 0006, 0007, and FIG. 1). .

Special table 2003-529070 gazette Japanese Patent No. 4208295

  In the sensor device described in Patent Document 1, the end of the device connector is fitted and connected to the hexagon casing, and the seal is sealed between the hexagon casing and the end of the device connector by compressing the packing. The sex is secured. Therefore, this sensor device has a problem that the process of connecting the hexagonal casing and the device connector is complicated and has a large number of parts, and the sealing performance of the connection portion is lowered due to deterioration of the packing, installation failure, and the like.

  In the sensor device described in Patent Document 2, a gasket is disposed between the remote end wall portion of the housing and the circumferential flange of the connector, and the remote end wall portion of the housing is plastically deformed, thereby And the connector are connected to ensure the sealing performance of the connecting portion. For this reason, this sensor device has a problem that the process of connecting the housing and the connector is complicated and has a large number of parts, and the sealing performance of the connecting portion is lowered due to deterioration of the gasket or installation failure.

  The present invention has been made in view of the above problems, and in a pressure detection device that detects the pressure of a fluid, the connection between the connector portion and the housing is facilitated to reduce the number of components, and the connector portion and the housing It aims at improving the sealing performance between.

  In order to achieve the above object, a pressure detection device of the present invention is a resin-made product having a pressure port into which a fluid is introduced, a pressure sensor disposed at a pressure receiving portion of the pressure port, and a terminal connected to the pressure sensor. And a housing connected to the connector portion and the pressure port to accommodate the pressure sensor, wherein the housing is embedded in the connector portion and the connector portion. It has the engaging part to engage, It is characterized by the above-mentioned.

  According to the present invention, in the pressure detection device that detects the pressure of the fluid, the connection between the connector portion and the housing can be facilitated, the number of parts can be reduced, and the sealing performance between the connector portion and the housing can be improved. it can.

The longitudinal cross-sectional view of the pressure detection apparatus which concerns on Embodiment 1 of this invention. The cross-sectional view which follows the II-II line of the pressure detection apparatus shown in FIG. The side view of the cover member of the housing of the pressure detection apparatus shown in FIG. The side view of the cover member of the pressure detection apparatus which concerns on Embodiment 2 of this invention. The longitudinal cross-sectional view of the cover member shown in FIG. The longitudinal cross-sectional view of the cover member of the pressure detection apparatus which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the pressure detection device of the present invention will be described with reference to the drawings.

[Embodiment 1]
FIG. 1 is a longitudinal sectional view of a pressure detection device 1 according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along line II-II of the pressure detection device 1 shown in FIG.

  The pressure detection device 1 according to the present embodiment is mounted on various devices to be measured, for example, for environmental compatibility of automobiles and fuel consumption improvement, and measures, for example, a medium to high pressure sensor of about several MPa to several hundred MPa. It is. More specifically, the pressure detection device 1 allows, for example, engine oil pressure, variable valve oil pressure, power steering pressure, in-cylinder injection (DI) pressure, brake oil pressure, pressure of working fluid in the suspension, transmission, air conditioner, etc. Can be measured.

  The pressure detection device 1 mainly includes a pressure port 10, a pressure sensor 20, a terminal block 30, a connector portion 40, and a housing 50. Although details will be described later, the pressure detection device 1 of the present embodiment is characterized in that the housing 50 is embedded in the connector portion 40 and has a through hole 53 as an engaging portion that engages with the connector portion 40.

  The pressure port 10 is a substantially cylindrical member connected to the measurement target device, and is formed in a tubular shape having a hollow portion 11 for introducing a fluid therein. The pressure port 10 has an opening 12 for introducing a fluid at one end in the longitudinal direction, and a wall 13 for receiving the fluid pressure at the other end in the longitudinal direction. The wall 13 closes the end of the pressure port 10 opposite to the opening 12 and has a recess 14 that faces the hollow portion 11.

  In the pressure port 10, the concave portion 14 provided in the wall portion 13 is formed in a rectangular shape such as a square or a rectangle corresponding to the shape of the pressure sensor 20 in a plan view from the longitudinal direction of the pressure port 10. The bottom of the concave portion 14 is a pressure receiving portion 15 that is deformed by receiving the pressure of the fluid. That is, the pressure receiving portion 15 is a rectangular thin portion provided on the wall portion 13 of the pressure port 10 and functions as a diaphragm that is deformed by receiving the pressure of the fluid introduced into the hollow portion 11 of the pressure port 10. A pressure sensor 20 is disposed on the end surface of the pressure port 10 opposite to the hollow portion 11 of the pressure receiving portion 15.

  The pressure port 10 has an end portion on the opening 12 side as a large-diameter portion 16 having a larger diameter than an end portion on the pressure receiving portion 15 side, and an end portion on the pressure receiving portion 15 side has a diameter larger than that on the end portion on the opening portion 12 side. The small-diameter portion 17 is small. As shown in FIG. 2, the end portion of the pressure port 10 where the small diameter portion 17, that is, the pressure receiving portion 15 is formed is formed in a cylindrical shape having a flat portion 17 a on a part of the outer peripheral surface. The small diameter portion 17 of the pressure port 10 has two flat portions 17a, a first flat portion 17a1 and a second flat portion 17a2. The surface of the first flat portion 17a1 and the surface of the second flat portion 17a2 are surfaces perpendicular to each other.

  The pressure port 10 has a threaded portion 16 a on the outer peripheral surface of the large diameter portion 16. The screw portion 16a is, for example, a male screw portion that is screwed into an inner screw or a female screw of a socket of the measurement target device. The pressure port 10 includes a flange portion 18 projecting outward in the radial direction and a groove portion 19 recessed inward in the radial direction between the large diameter portion 16 and the small diameter portion 17. The flange portion 18 has a step portion 18a in the thickness direction at the peripheral edge portion. The edge portion of the opening portion 51a of the base portion 51 of the housing 50 is engaged with the step portion 18a.

  The material of the pressure port 10 is, for example, a metal material such as carbon steel, aluminum alloy, copper alloy, and stainless steel. In the pressure port 10, the peripheral edge portion of the flange portion 18 is joined to the edge portion of the opening portion 51 a of the base portion 51 of the housing 50 by, for example, laser welding. As a result, a welded portion W that is a connecting portion C <b> 1 having a sealing property is formed between the pressure port 10 and the base portion 51 of the housing 50. That is, the connection portion C1 between the pressure port 10 and the base portion 51 has air tightness and liquid tightness, and seals between the pressure port 10 and the base portion 51.

  The housing 50 includes a base portion 51 connected to the pressure port 10 and a cover member 52 connected to the connector portion 40, and accommodates the pressure sensor 20 and the terminal block 30 inside.

  The base 51 is a plate-like member made of a metal material having excellent weldability with the pressure port 10, for example. The base 51 has, for example, a circular outer shape as viewed from the central axis CL direction of the pressure port 10, and has, for example, a circular opening 51a at the center. As for the base part 51, the opening part 51a engages with the level | step-difference part 18a of the flange part 18 of the pressure port 10, and the edge part of the opening part 51a is joined to the peripheral part of the flange part 18 of the pressure port 10 as mentioned above. And is fixed to the pressure port 10. A terminal block 30 is fixed to the surface of the base portion 51 and the flange portion 18 of the pressure port 10 facing the connector portion 40.

  The cover member 52 is formed in a cylindrical shape having openings 52a and 52b at both ends in the central axis CL direction, for example, using a metal material such as carbon steel, aluminum alloy, copper alloy, and stainless steel. The cover member 52 has a hexagonal nut shape, as shown in FIG. 2, in which the outer shape of the portion between the one opening 52 a and the other opening 52 b is viewed from the central axis CL direction of the cover member 52.

  As shown in FIG. 1, one opening 52 a of the cover member 52 in the direction of the central axis CL is embedded in the flange portion 42 b of the connector portion 40 by, for example, insert molding, and is integrally connected to the flange portion 42 b of the connector portion 40. And is closed by the connector portion 40. Thereby, the connection part C <b> 2 having a sealing property is formed between the cover member 52 of the housing 50 and the connector part 40.

  FIG. 3 is a side view of the cover member 52 that is a part of the housing 50.

  A plurality of through holes 53 that are engaging portions of the housing 50 are provided in the peripheral edge portion of the one opening 52 a in the central axis CL direction of the cover member 52. More specifically, the peripheral edge portion of the opening 52a of the cover member 52 is a cylindrical connecting portion 54, and a plurality of through holes 53 that pass through the cover member 52 in the radial direction are provided in the connecting portion 54. Yes. As shown in FIG. 1, the plurality of through holes 53 of the cover member 52, which is the engaging portion of the housing 50, are embedded in the connector portion 40 and engaged with the connector portion 40.

  More specifically, the cylindrical connecting portion 54 at the peripheral edge of the opening 52a of the cover member 52 is embedded in the connector portion 40 by, for example, insert molding, and is in close contact with the resin material of the connector portion 40 without a gap. Further, the resin material of the connector portion 40 is filled in the through hole 53 of the cover member 52 embedded in the connector portion 40. The resin material filled in the through hole 53 of the cover member 52 becomes an engaging portion of the connector portion 40 that engages with the through hole 53 that is an engaging portion of the housing 50.

  Around the other opening 52b in the central axis CL direction of the cover member 52, a flange portion 55 is formed extending from the inside in the radial direction perpendicular to the center axis CL to the outside. The flange portion 55 is formed by bending the end portion of the cover member 52 extending along the central axis CL from the inner side to the outer side in the radial direction.

  As shown in FIG. 1, the flange portion 55 of the cover member 52 and the peripheral portion of the base portion 51 are joined by, for example, laser welding, and the connection portion C <b> 3 having a sealing property between the cover member 52 and the base portion 51. The welding part W which is is formed. Thus, one opening 52a in the central axis CL direction of the cover member 52 is closed by the connector 40, and the other opening 52b in the central axis CL direction of the cover member 52 is formed in the base 51 and the pressure port 10. The flange portion 18 is closed.

  That is, the housing 50 includes a connecting portion C1 having a sealing property between the base portion 51 and the pressure port 10, between the cover member 52 and the connector portion 40, and between the base portion 51 and the cover member 52. , C2, C3. Thereby, the housing 50 has the accommodating part 56 which accommodates the pressure sensor 20 and the terminal block 30 in the sealed state.

  The terminal block 30 is formed, for example, in a substantially rectangular parallelepiped block shape with rounded corners, and one surface has a surface of the base portion 51 facing the connector portion 40 and a flange portion 18 of the pressure port 10 by, for example, an adhesive. It is bonded and fixed to the surface. As shown in FIG. 2, the terminal block 30 has a generally rectangular shape when viewed from the central axis CL direction of the pressure port 10, and has a slightly wider central portion in the longitudinal direction and a slightly narrow width at both ends in the longitudinal direction. It has become. The terminal block 30 has an opening 31 for arranging the pressure receiving portion 15 of the pressure port 10 in which the pressure sensor 20 is arranged at the center, and has a plurality of recesses 32 and a relay terminal 33 at one end in the longitudinal direction. ing.

  The opening 31 of the terminal block 30 has a generally sector shape having a circular arc portion 31 a along the outer peripheral surface of the cylindrical small-diameter portion 17 of the pressure port 10 and a straight portion 31 b along the planar flat portion 17 a of the pressure port 10. It is formed in the shape of. The opening 31 of the terminal block 30 is opposed to the first straight portion 31b1 that is the first flat portion facing the first flat portion 17a1 of the pressure port 10 and the second flat portion 17a2 of the pressure port 10. It has two straight portions 31b with a second straight portion 31b2 which is a second plane portion. The first straight line portion 31b1 that is the first flat surface portion and the second straight line portion 31b2 that is the second flat surface portion are formed perpendicular to each other.

  As shown in FIG. 2, a plurality of recesses 32 and relay terminals 33 are provided adjacent to each other in the short direction of the upper surface of the terminal block 30 so as to correspond to the plurality of connector terminals 41 extending from the connector portion 40. . In the pressure detection device 1 of the present embodiment, the terminal block 30 includes, for example, three concave portions 32 and three relay terminals 33 corresponding to the three connector terminals 41 of the connector portion 40.

  The relay terminal 33 of the terminal block 30 is an elongated plate-shaped member made of a conductive metal material such as Au, Cu, Al, and the like, and is integrally coupled to the terminal block 30 by insert molding, for example. Yes. The relay terminal 33 has a concave portion that extends along the concave portion 32 of the terminal block 30, receives the insertion end 41 a of the connector terminal 41 inserted into the concave portion 32 inside the concave portion, and connects to the connector terminal 41. Is done. A portion of the relay terminal 33 along the upper surface of the terminal block 30 is connected to one end of the wire 22 formed by wire bonding. As shown in FIG. 2, the other end of the wire 22 is connected to the terminal portion 21 of the pressure sensor 20.

  The pressure sensor 20 is, for example, a semiconductor strain sensor in which a sensor element and a control circuit are formed on a silicon substrate to be integrated into one chip. For example, the pressure sensor 20 is bonded and fixed to the pressure receiving portion 15 of the pressure port 10 with an adhesive 23, for example. ing. As shown in FIG. 2, the pressure sensor 20 is formed in a rectangular shape such as a square or a rectangle corresponding to the planar shape of the pressure receiving portion 15 in the planar shape viewed from the central axis CL direction of the pressure port 10. The pressure sensor 20 has a terminal portion 21 connected to a relay terminal 33 provided on the terminal block 30.

  The terminal portion 21 of the pressure sensor 20 and the relay terminal 33 of the terminal block 30 are connected by a metal wire 22. The wire 22 can be formed by wire bonding using, for example, Al or Au as a material. The pressure sensor 20 is covered with an insulating gel 24 in a state where the terminal portion 21 is connected to the relay terminal 33 of the terminal block 30 by the wire 22.

  The gel 24 can be formed by potting using, for example, a silicone resin. In FIG. 2, the gel 24 covering the pressure sensor 20 is opposed to the connector portion 40 of the pressure sensor 20 in order to show the connection by the wire 22 between the terminal portion 21 of the pressure sensor 20 and the relay terminal 33 of the terminal block 30. The state cut | disconnected along the surface is shown.

  The connector unit 40 is connected to, for example, a signal line connector that transmits a signal to an electronic control unit (ECU) of an automobile, and transmits a signal from the pressure sensor 20 to an external device such as an ECU via the signal line. It is a resin member. The connector part 40 is made of, for example, polyphenylene sulfide (PPS) resin or polybutylene terephthalate (PBT) resin.

  The connector portion 40 includes a connector terminal 41 that is connected to the relay terminal 33 of the terminal block 30 and outputs a signal of the pressure sensor 20 to the outside, and a main body portion 42 that is integrally coupled to the connector terminal 41.

  The connector terminal 41 is an elongated plate-like, rod-like, or needle-like member made of a conductive metal material such as Au, Cu, Al, etc., and is integrally coupled to the main body 42 by insert molding, for example. Has been. The connector terminal 41 has an insertion end portion 41a connected to the relay terminal 33 of the terminal block 30, and an output end portion 41b connected to a connector terminal of an external device.

  The connector terminal 41 is bent at a substantially right angle between the intermediate portion 41c and the insertion end portion 41a and between the output end portion 41b. Thereby, the connector terminal 41 has the insertion end portion 41a and the output end portion 41b extending along the central axis CL direction of the connector portion 40, and the intermediate portion 41c along the radial direction of the connector portion 40 perpendicular to the central axis CL direction. It extends. The distal end portions of the insertion end portion 41a and the output end portion 41b each have a tapered shape that becomes thinner as approaching the distal end.

  The main body 42 is formed integrally with the connector terminal 41 by insert-molding the connector terminal 41. The main body 42 includes an engaging portion 42a that engages with a signal line connector or the like connected to an external device such as an ECU, and the radial direction of the engaging portion 42a from one end in the central axis CL direction of the engaging portion 42a. And an extending flange portion 42b.

  The engagement portion 42a is provided with an engagement recess 42c for engaging a signal line connector or the like connected to an external device at the end opposite to the flange portion 42b, and has a hollow portion on the inside. It is formed in a shape. An output end 41b of the connector terminal 41 embedded in the main body 42 of the connector 40 is exposed in the engagement recess 42c.

  The engaging portion 42a has an outer shape viewed from the center axis CL direction, for example, formed in a field track shape having a pair of opposing linear flat portions and a pair of arcuate curved portions on both sides thereof. . At the bottom of the engaging recess 42c of the engaging portion 42a, a plurality of connector terminals 41 in the longitudinal direction of the engaging portion 42a, more specifically, as shown in FIG. The relay terminals 33 are arranged at intervals corresponding to the receiving connection portions 33a.

  The flange portion 42b extends from the end of the engaging portion 42a opposite to the engaging recess 42c in a direction perpendicular to the central axis CL direction of the engaging portion 42a, and is viewed from the central axis CL direction of the engaging portion 42a. The outer shape is formed in a circular shape, for example. An intermediate portion 41c of the connector terminal 41 is embedded in the flange portion 42b. The flange portion 42 b protrudes the insertion end 41 a of the connector terminal 41 toward the recess 32 of the terminal block 30 from a position facing the recess 32 on the surface facing the terminal block 30. A through hole 53 of a cover member 52 that is an engaging portion of the housing 50 is embedded in the outer edge portion of the flange portion 42b.

  The pressure detection device 1 of the present embodiment can be assembled by the following procedure, for example. First, the pressure sensor 20 is bonded and fixed to the pressure receiving portion 15 of the pressure port 10 with, for example, an adhesive 23. Next, the edge portion of the opening portion 51a of the base portion 51 of the housing 50 is engaged with the step portion 18a of the flange portion 18 of the pressure port 10, and the pressure port 10 and the base portion 51 of the housing are joined by laser welding, for example. To do.

  Next, the small diameter portion 17 of the pressure port 10 is inserted into the opening 31 of the terminal block 30, and the flat portion 17 a of the small diameter portion 17 of the pressure port 10 and the straight portion 31 b of the opening 31 of the terminal block 30 are opposed to each other. To align. And the terminal block 30 is joined and fixed to the surface which opposes the flange part 18 of the pressure port 10, and the connector part 40 of the base part 51, for example with an adhesive agent. Then, the wire 22 which connects the terminal part 21 of the pressure sensor 20 and the wire connection part 33b of the relay terminal 33 of the terminal block 30 is formed by a wire bonding apparatus, for example, and the gel 24 which covers the pressure sensor 20 is formed by a potting apparatus. To do.

  Next, for example, the connector portion 40 in which the connector terminal 41 and the cover member 52 of the housing 50 are integrated is prepared by insert molding. Then, the insertion end 41 a of the connector terminal 41 of the connector portion 40 and the recess 32 of the terminal block 30 are aligned, and the insertion end 41 a of the connector terminal 41 is inserted into the recess 32 of the terminal block 30. The insertion end portion 41a is received by the concave shape portion of the relay terminal 33 arranged along.

  Thereby, the connector terminal 41 of the connector part 40 and the terminal part 21 of the pressure sensor 20 are electrically connected via the wire 22 and the relay terminal 33. Finally, the flange portion 55 and the base portion 51 of the cover member 52 are joined by, for example, laser welding to seal the housing 50. As described above, the pressure detection device 1 shown in FIG. 1 can be manufactured.

  Hereinafter, the operation of the pressure detection device 1 of the present embodiment will be described.

  The pressure detection device 1 is mounted on, for example, various devices mounted on an automobile, and the pressure of working fluid such as engine oil pressure, variable valve oil pressure, power steering pressure, DI pressure, brake oil pressure, suspension, transmission, air conditioner, etc. Measure. The pressure detection device 1 is a medium-high pressure sensor that measures medium-high pressure, for example, about several MPa to several hundred MPa.

  As described above, the pressure detection device 1 of the present embodiment is connected to the pressure port 10 into which a fluid is introduced, the pressure sensor 20 disposed in the pressure receiving portion 15 of the pressure port 10, and the pressure sensor 20. A resin connector portion 40 having a connector terminal 41 and a housing 50 that is connected to the connector portion 40 and the pressure port 10 and accommodates the pressure sensor 20 are provided. In the pressure detection device 1, the housing 50 has a through hole 53 that is an engaging portion that is embedded in the connector portion 40 and engages with the connector portion 40.

  Thus, the connector part 40 and the housing 50 can be integrated by insert molding by setting it as the structure by which the engaging part of the housing 50 is embedded in the connector part 40 made from resin. Thereby, the resin material of the connector part 40 adheres to the housing 50 without a gap, and the connection part C <b> 2 having a sealing property is formed between the housing 50 and the connector part 40. Further, the housing 50 is embedded in the connector portion 40 and has the through hole 53 that is an engaging portion that engages with the connector portion 40, so that the housing 50 is prevented from falling off the connector portion 40.

  Therefore, it is not necessary to use a seal member such as a packing or a gasket unlike the conventional sensor device, and it is not necessary to perform a complicated assembly process for arranging the seal member. Therefore, according to the pressure detection device 1 of the present embodiment, the connection between the connector portion 40 and the housing 50 is facilitated, the number of parts is reduced, and the sealing performance between the connector portion 40 and the housing 50 is improved. be able to.

  Further, since the engaging part of the housing 50 is the through hole 53, the resin material of the connector part 40 is filled in the through hole 53 embedded in the resin connector part 40, and the connector part filled in the through hole 53. Forty resin materials engage with the through hole 53. Thereby, it is possible to prevent the housing 50 embedded in the resin connector part 40 from dropping from the connector part 40 by the resin material of the connector part 40 filled in the through hole 53 and entering the through hole 53.

  Moreover, when the connector part 40 consists of PPS resin or PBT resin, the heat resistance of the connector part 40, durability, mechanical strength, and rigidity can be improved rather than another resin material.

  In the configuration in which the end of the device connector is fitted to the hexagon casing as in the conventional sensor device, the device connector needs to be elastically deformed to some extent, for example, snap fit. Therefore, when the device connector is made of PPS resin or PBT resin, it is difficult to elastically deform the device connector, the assembling property of the sensor device is deteriorated, and the productivity is lowered.

  On the other hand, in the pressure detection device 1 of the present embodiment, the housing 50 is embedded in the connector portion 40. Therefore, it is not necessary to elastically deform the connector part 40 and engage with the housing 50, and the connector part 40 made of PPS resin or PBT resin excellent in heat resistance, durability, mechanical strength, and rigidity can be used. .

  As described above, according to the present embodiment, in the pressure detection device 1 that detects the pressure of the fluid, the connection between the connector portion 40 and the housing 50 is facilitated to reduce the number of components, and the connector portion 40 and the housing The sealing property between 50 can be improved.

[Embodiment 2]
Next, Embodiment 2 of the pressure detection device of the present invention will be described with reference to FIGS. 4 and 5 with reference to FIGS.

  FIG. 4 is a side view of a cover member 52A that is a part of the housing 50 of the pressure detection device of the present embodiment. FIG. 5 is a longitudinal sectional view of the cover member 52A shown in FIG.

  The pressure detection device of the present embodiment is different from the pressure detection device 1 according to the first embodiment described above in that the engaging portion of the housing 50 is a recess 53A provided in the cover member 52A. Since the other points of the pressure detection device of the present embodiment are the same as those of the pressure detection device 1 according to the above-described first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  In the pressure detection device of the present embodiment, a recess 53A is formed in a cylindrical connection portion 54 at the peripheral edge of the opening 52a of the cover member 52A. The recessed portion 53A is formed over the entire circumference of the connecting portion 54 of the cover member 52A, is a constricted portion with a reduced diameter of the connecting portion 54, and is recessed in the radial direction of the connecting portion 54 of the cover member 52A. .

  In the pressure detection device of the present embodiment, the concave portion 53 </ b> A that is an engaging portion of the housing 50 is embedded in the connector portion 40 and is engaged with the connector portion 40. More specifically, the resin material of the connector part 40 is filled in the recess 53A of the cover member 52A embedded in the connector part 40. The resin material of the connector part 40 filled in the concave part 53 </ b> A of the cover member 52 becomes an engaging part of the connector part 40 that engages with the concave part 53 </ b> A that is the engaging part of the housing 50.

  Therefore, according to the pressure detection device of the present embodiment, as in the pressure detection device 1 of the first embodiment described above, the connector portion 40 and the housing 50 can be easily connected to reduce the number of components, and the connector portion 40 can be reduced. And the sealing performance between the housing 50 can be improved. Further, the housing 50 is prevented from falling off from the connector portion 40 as in the pressure detection device 1 of the first embodiment.

  Further, since the concave portion 53A that is the engaging portion of the housing 50 is recessed in the radial direction of the cover member 52A of the housing 50, the resin material of the connector portion 40 filled in the concave portion 53A of the cover member 52A can be used as the cover member. 52A protrudes in the radial direction and enters the recess 53A. The resin material of the connector portion 40 that protrudes in the radial direction of the cover member 52A and enters the recess 53A can reliably prevent the cover member 52A from falling off in a direction perpendicular to the radial direction.

[Embodiment 3]
Finally, Embodiment 3 of the pressure detection device of the present invention will be described with reference to FIGS. 1 and 2 and FIG.

  FIG. 6 is a longitudinal sectional view of a cover member 52B which is a part of the housing 50 of the pressure detection device of the present embodiment.

  The pressure detection device according to the present embodiment is different from the pressure detection device 1 according to the first embodiment described above in that the engaging portion of the housing 50 is a convex portion 53B provided on the cover member 52B. Since the other points of the pressure detection device of the present embodiment are the same as those of the pressure detection device 1 according to the above-described first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  In the pressure detection device of the present embodiment, a convex portion 53B is formed on a cylindrical connection portion 54 at the peripheral edge of the opening 52a of the cover member 52B. The convex portion 53B is a portion obtained by deforming a part of the connection portion 54 of the cover member 52B so as to protrude in the radial direction of the cover member 52A.

  More specifically, a plurality of rectangular cuts 53 </ b> B ′ are provided in the connecting portion 54 of the cover member 52 </ b> A at equal intervals in the radial direction. The rectangular cut 53B 'is formed along three sides of the four sides of the rectangle excluding one side along the edge of the opening 52a of the cover member 52B. A portion surrounded by the cut 53B 'is bent outward in the radial direction of the cover member 52B, thereby forming a convex portion 53B and a through hole 53 protruding in the radial direction of the cover member 52B.

  In the pressure detection device of the present embodiment, the convex portion 53 </ b> B and the through hole 53 that are the engaging portions of the housing 50 are embedded in the connector portion 40 and engaged with the connector portion 40. More specifically, the resin material is filled in the periphery of the convex portion 53 </ b> B of the cover member 52 </ b> B embedded in the connector portion 40 and the inside of the through hole 53.

  The resin material of the connector portion 40 filled around the convex portion 53B of the cover member 52B becomes a concave engaging portion of the connector portion 40 that engages with the convex portion 53B that is the engaging portion of the housing 50. Further, the resin material of the connector part 40 filled in the through hole 53 of the cover member 52 </ b> B becomes a columnar engaging part of the connector part 40 that engages with the through hole 53 that is the engaging part of the housing 50.

  Therefore, according to the pressure detection device of the present embodiment, as in the pressure detection device 1 of the first embodiment described above, the connector portion 40 and the housing 50 can be easily connected to reduce the number of components, and the connector portion 40 can be reduced. And the sealing performance between the housing 50 can be improved. Further, the housing 50 is prevented from falling off from the connector portion 40 as in the pressure detection device 1 of the first embodiment.

  Further, since the convex portion 53B that is the engaging portion of the housing 50 protrudes in the radial direction of the cover member 52B of the housing 50, the resin material of the connector portion 40 filled around the convex portion 53B of the cover member 52B. Are recessed in the radial direction of the cover member 52B to receive the protrusion 53B. By engaging the convex portion 53B with the concave resin material of the connector portion 40 that is recessed in the radial direction of the cover member 52B, it is possible to reliably prevent the cover member 52B from falling off in the direction perpendicular to the radial direction.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Pressure detection apparatus, 10 Pressure port, 15 Pressure receiving part, 20 Pressure sensor, 40 Connector part, 41 Connector terminal (terminal), 50 Housing, 53 Through-hole (engagement part), 53A Concavity (engagement part), 53B Convex Part (engagement part)

Claims (7)

A pressure port into which a fluid is introduced; a pressure sensor disposed at a pressure receiving portion of the pressure port; a resin connector portion having a terminal connected to the pressure sensor; and the connector portion and the pressure port. A housing for housing the pressure sensor, and a pressure detection device comprising:
The pressure detection device according to claim 1, wherein the housing includes an engaging portion that is embedded in the connector portion and engages with the connector portion.   The pressure detection device according to claim 1, wherein the engaging portion is a through hole.   The pressure detecting device according to claim 1, wherein the engaging portion is a concave portion.   The pressure detecting device according to claim 3, wherein the recess is recessed in a radial direction of the housing.   The pressure detecting device according to claim 1, wherein the engaging portion is a convex portion.   The pressure detecting device according to claim 5, wherein the convex portion protrudes in a radial direction of the housing.   The pressure detection device according to claim 1, wherein the connector portion is made of polyphenylene sulfide resin or polybutylene terephthalate resin.

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