WO2007004313A1 - Capteur de pression - Google Patents

Capteur de pression Download PDF

Info

Publication number
WO2007004313A1
WO2007004313A1 PCT/JP2005/019718 JP2005019718W WO2007004313A1 WO 2007004313 A1 WO2007004313 A1 WO 2007004313A1 JP 2005019718 W JP2005019718 W JP 2005019718W WO 2007004313 A1 WO2007004313 A1 WO 2007004313A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
display
detection circuit
positioning
pressure sensor
Prior art date
Application number
PCT/JP2005/019718
Other languages
English (en)
Japanese (ja)
Inventor
Masakatsu Tamaoki
Original Assignee
Sunx Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunx Limited filed Critical Sunx Limited
Publication of WO2007004313A1 publication Critical patent/WO2007004313A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/14—Housings

Definitions

  • the present invention relates to a pressure sensor.
  • a pressure sensor one that digitally displays the pressure of a fluid (gas or liquid) measured by a diaphragm type pressure detection element is known (see, for example, JP-A-10-142090).
  • a pressure sensor has various components such as a pressure detection board on which a pressure detection element is mounted and a display board for controlling a display unit in a casing composed of a front case and a rear case. It is the structure which stacked and accommodated.
  • Each board is held at a predetermined interval by, for example, fitting its outer edge part to a frame-like holding member, and the lead wire extended from one board is soldered to the circuit of the other board Thus, they are electrically connected to each other.
  • each substrate is held by fitting its outer edge portion to a holding member.
  • the outer shape of the substrate generally has a relatively large dimensional error of about ⁇ 0.2 mm. For this reason, the holding positions of both substrates may be displaced from each other in the plate surface direction. If the positional deviation between the two boards is large, the connectors on both boards will be difficult to fit together. As described above, the positioning accuracy of each component such as the board is low, or if it is not positioned, it may be difficult to assemble, and it may be difficult to assemble, and the assembly work may not be performed smoothly. was there.
  • the present invention has been completed based on the above circumstances, and its purpose is to provide components. Therefore, the present invention provides a pressure sensor that can improve the positioning accuracy of the assembly and facilitate smooth assembly work.
  • a liquid crystal display device is a pressure sensor that detects and displays the pressure of a fluid to be measured, and includes a front case having a window and an inlet for introducing the fluid to be measured.
  • a casing comprising a rear case, a detection circuit board having a pressure detection element and a pressure detection means for detecting the pressure of the fluid to be measured introduced into the inlet, and visible from the window, and
  • a display circuit board having a display unit for displaying the pressure detected by the pressure detection unit and a display unit for controlling the display of the display unit, and the detection circuit board and the display circuit board, which are respectively mounted and fitted to each other.
  • the board connection connector for connecting the two boards together, at least one of the front case and the rear case, the detection circuit board, and the display circuit board are positioned relative to each other. Positioning means, and the front case and the rear case are provided with engaging means that can be engaged with each other, and the front case and the rear case are engaged by the engaging means. As a result, the detection circuit board and the display circuit board are sandwiched between the front case and the rear case, and the board connection connectors of both boards are mechanically and electrically in a positioned state. It is characterized by where it is connected.
  • connection means between the boards is constituted by board connection connectors that are mounted on each board, if the board connection connectors are previously mounted on each board, the boards of both boards are assembled in the assembly process. By simply fitting the connectors for connection, wiring between the two boards can be performed without soldering, so that the assembly process can be simplified.
  • the positioning means is tightly fitted to a positioning hole provided in the detection circuit board and a positioning hole provided in the display circuit board, respectively, so that the detection circuit board and First positioning means for holding the display circuit board in a positioning state And a second positioning means that is provided integrally with the rear case and is tightly fitted in a positioning hole provided in the detection circuit board to hold the detection circuit board in a positioned state. I prefer to be prepared.
  • the first positioning means is closely fitted into the positioning hole of the detection circuit board and the positioning hole of the display circuit board, whereby the two boards are positioned relative to each other.
  • the second positioning means of the rear case is closely fitted in the positioning hole of the detection circuit board, so that the detection circuit board is held in the rear case in a positioned state. Since the positioning holes of each board can be formed with higher dimensional accuracy than the outer shape of the board, the positioning accuracy of each board can be increased compared to the case where each board is positioned using the outer shape. . Therefore, the board connector can be easily fitted and the pressure sensor can be assembled smoothly.
  • a pressing member that elastically presses the display circuit board or the detection circuit board in a direction opposite to a direction in which the front case and the rear case are clamped is provided in the casing. And prefer to be.
  • the pressing member is disposed separately on both sides of the central portion of the substrate surface.
  • the pressing member is arranged separately on both sides of the center of the front plate surface, so that the balance of the pressing force is improved as compared with the case where the pressing member is provided only on one side.
  • the pressing member is constituted by a button member having an operation portion exposed to the outer surface of the casing and capable of being pressed.
  • the pressing member is constituted by a button member that is an existing component, an increase in the number of components can be prevented.
  • the display unit is configured by an LCD housed inside the window unit, and the pressing member includes an electrode unit provided on the LCD and an electrode unit provided on the substrate surface. And a support member that is disposed between the LCD and the display circuit board and supports the wiring member.
  • the pressing member is constituted by a wiring member which is an existing component, an increase in the number of components can be prevented.
  • the display unit is configured by an LCD housed inside the window unit, and the electrode unit provided on the LCD and the electrode unit provided on the substrate surface are electrically connected to each other.
  • both of the pressing members arranged separately on both side positions are constituted by the button members or the wiring members that are existing components, so that an increase in the number of components can be prevented.
  • At least one of the front case and the rear case, the detection circuit board, and the display circuit board are sequentially assembled using the standing positioning means, and then the front case and the rear case are engaged.
  • the detection circuit board and the display circuit board are sandwiched between the two cases, the assembly can be easily performed.
  • the connection means between the boards is composed of board connection connectors that are mounted on each board, if the board connection connectors are mounted on each board in advance, the board connection between both boards is possible in the assembly process. The assembly process is simplified because the wiring between the two boards can be done without soldering by simply fitting the connector for the connector.
  • FIG. 1 is a front view of a pressure sensor according to an embodiment of the present invention.
  • Embodiment 1 of the present invention will be described with reference to FIGS.
  • the front-rear direction is based on the front side of FIG. 1
  • the left side of FIG. 2 is the front
  • the vertical direction is based on FIGS. 1 and 2.
  • the pressure sensor 1 of the present embodiment includes a fluid in the casing 2.
  • pressure detection means 3 for detecting the pressure of (gas or liquid)
  • display means 4 for displaying the detected pressure, and the like.
  • the casing 2 has a box shape as a whole, and includes a front case 5 made of synthetic resin and a rear case 6 made of synthetic resin.
  • the front case 5 covers the front surface of the pressure sensor 1 and part of the top, bottom, left, and right surfaces, and a rectangular window portion 7 is opened on the front surface so that the display of the display means 4 described later can be seen.
  • a transparent display cover 8 made of a synthetic resin material is fitted on the window 7 with a rear force, and a film-like name plate 9 is attached to the rear surface of the display cover 8.
  • three button openings 10 through which an operation portion 56 of a button member 54 (described later) is passed are provided side by side at the lower front portion of the front case 5.
  • the rear case 6 has a square shape when viewed from the front, and covers the rear surface of the pressure sensor 1.
  • a square tube portion 12 that can be fitted inside the rear end portion of the front case 5 is provided so as to protrude forward.
  • a pair of locking claws 13 are provided on each surface on the outer peripheral surface of the rectangular tube portion 12, and when the front case 5 is fitted, The front case 5 and the rear case 6 are engaged with each other by engaging the claws 13 with the locking holes 14 (corresponding to the engaging means of the present invention) provided on the upper, lower, left and right surfaces of the front case 5. Is done.
  • Positioning projections 16 (corresponding to the second positioning means of the present invention) for positioning a detection circuit board 21 (described later) are provided on the front end surface of the rectangular tube portion 12 so as to protrude forward. ing.
  • an inlet 17 for introducing the fluid to be measured is provided in the center of the rear case 6 so as to penetrate in the front-rear direction, and an inlet pipe 18 for guiding the fluid to the inlet 17 at the opening edge. It is attached in a state protruding from the rear.
  • the pressure detection means 3 includes a diaphragm type pressure detection element 20 and the pressure detection element 20
  • a detection circuit board 21 that is mounted and formed with a detection circuit (not shown) for detecting pressure and the like is provided.
  • the detection circuit board 21 has a rectangular shape slightly smaller than the inner dimension of the front case 5.
  • the four corners of the detection circuit board 21 are provided with positioning holes 22 to which the positioning protrusions 16 of the rear case 6 can be tightly fitted, and the detection circuit board 21 has positioning protrusions in these positioning holes 22.
  • the rear outer peripheral portion is brought into contact with the front end surface of the rectangular tube portion 12 while the 16 is fitted, so that the rear case 6 is held in a positioned state.
  • the detection circuit board 21 is provided with positioning holes 23 on the left side and the right side, respectively.
  • a pressure detection element 20 is attached to the center of the rear surface of the detection circuit board 21.
  • the pressure detection element 20 includes a cylindrical portion 20A that protrudes into the introduction pipe 18 of the introduction port 17, and an elastic member is formed between the outer peripheral surface of the cylindrical portion 20A and the inner peripheral surface of the introduction pipe 18.
  • An O-ring 24 is attached, which seals the inside of the casing 2.
  • An external connection connector 25 is mounted on the upper rear surface of the detection circuit board 21. This external connection connector 25 can be connected to a connector (not shown) in which an external force is also fitted through a connector through hole 26 provided in the rear case 6.
  • a board connection connector 27 that can be fitted and connected to a board connection connector 40 provided on a display circuit board 32 described later is mounted on the left side of the detection circuit board 21 in front of the front force. .
  • the display means 4 includes an LCD 30 for displaying the detected pressure and the like (corresponding to the display unit of the present invention), a diffusing member 31 for diffusing the backlight of the LCD 30, and an LCD 30 for controlling the LCD 30.
  • a display circuit board 32 on which a display circuit (not shown) and the like are formed is provided.
  • the display circuit board 32 has a substantially rectangular shape that is approximately the same size as the detection circuit board 21.
  • the display circuit board 32 is arranged so as to overlap with the spacer 35 in front of the detection circuit board 21 described above.
  • the spacer 35 (corresponding to the first positioning means of the present invention) is formed in a square tube shape from a synthetic resin material, and its rear end surface is connected to the detection circuit board 21.
  • the two substrates 21 and 32 are arranged in parallel at a predetermined interval by bringing the front end surface into contact with the rear surface of the display circuit board 32.
  • the spacer 35 is closely attached to each positioning hole 23 of the detection circuit board 21 on the rear end surface of the spacer 35 described above.
  • a pair of positioning protrusions 36 that can be fitted are provided to protrude rearward. Further, the front end surface of the spacer 35 is provided with two positioning projections 37 protruding forward and one on the left side and one on the right side. The left and right sides of the display circuit board 32 are provided with a total of three positioning holes 38 through which the positioning projections 37 of the spacers 35 can be tightly fitted. By positioning the positioning protrusion 37, the spacer 35 is held in a positioned state.
  • a board connection connector 40 that can be fitted and connected to the board connection connector 27 of the detection circuit board 21 is mounted on the left side of the rear surface of the display circuit board 32.
  • a plurality of LEDs 41 are mounted on the front surface of the display circuit board 32 as a backlight of the LCD 30.
  • a display electrode portion 42 to which a wiring member 49 described later is connected is formed at the upper end portion on the front surface of the display circuit board 32.
  • three switch parts 43 are arranged side by side at the lower end of the front surface of the display circuit board 32.
  • the diffusing member 31 is formed into a square thick plate as a whole by a synthetic resin material.
  • a total of three positioning holes 44 are formed on the rear surface of the diffusing member 31 at positions corresponding to the positioning protrusions 37 of the spacer 35.
  • the diffusion member 31 is held in a positioned state with respect to the spacer 35 by tightly fitting the tip of the positioning protrusion 37 of the spacer 35 penetrating the circuit board 32.
  • An LCD mounting portion 45 having a rectangular frame shape is provided on the front surface of the diffusing member 31, and a rectangular flat LCD 30 is fitted into the LCD mounting portion 45 with the diffusing film 46 interposed therebetween.
  • a total of three rectangular backlight openings 47 are formed behind the LCD mounting portion 45 so that the LED 41 on the display circuit board 32 is in each backlight opening 47. Arranged on the side.
  • a groove-like wiring member mounting portion 48 extending in the left-right direction is provided through the upper end portion of the diffusing member 31, and the wiring member 49 is tightly mounted inside thereof.
  • the wiring member 49 (corresponding to the pressing member of the present invention) is formed in a flat plate shape by alternately overlapping elastic conductive rubber and insulating rubber.
  • the rear end portion of the wiring member 49 is connected to the display electrode portion 42 of the display circuit board 32, and the front end portion is connected to an electrode portion (not shown) provided at the upper rear end of the LCD 30.
  • the length dimension of the wiring member 49 is the display power supply.
  • a button mounting portion 50 for mounting the button member 54 is provided at the lower front portion of the diffusing member 31.
  • the button mounting portion 50 includes three through holes 51 provided at positions corresponding to the switch portions 43 of the display circuit board 32, and a substantially prismatic protrusion portion 52 protruding forward from the peripheral edge of the through hole 51. And.
  • the button member 54 (corresponding to the pressing member of the present invention) is also a rubber member having elasticity, and, as shown in Figs. Three operation parts 56 having a substantially prismatic shape projecting forward from the base part 55 and a columnar operation transmission part 57 in which the rear surface force of each operation part 56 extends rearward are provided.
  • the button member 54 is attached to the diffusing member 31 by fitting the base 55 to the protrusion 52 of the button mounting portion 50, and the base 55 is connected to the button mounting portion 50 and the front case 5 (more precisely, the front case). 5
  • the display cover that overlaps the rear surface 8) is sandwiched back and forth and compressed.
  • Each operation portion 56 protrudes from the button opening 10 described above to the front surface of the front case 5, and each operation transmission portion 57 is inserted into the through hole 51, and its rear end portion is the switch portion of the display circuit board 32. It is in contact with 43. As a result, the switch unit 43 is input by the pressing operation of the operation unit 56.
  • each component such as the pressure detection element 20, the board connection connector 27, and the external connection connector 25 is mounted on the detection circuit board 21.
  • the display circuit board 32 is mounted with various components such as the board connecting connector 40 and the switch 43.
  • the introduction pipe 18 is also fitted to the introduction port 17 of the rear case 6 with the rear side force, and the O-ring 24 is attached to the inside of the introduction pipe 18 at the introduction port 17.
  • the rear surface of the detection circuit board 21 is pressed against the front end face of the rectangular tube portion 12 while the positioning protrusion 16 of the rear case 6 is fitted in the positioning hole 22 of the detection circuit board 21.
  • the cylindrical portion 20A of the pressure detection element 20 is inserted into the O-ring 24, and the external connection connector 25 is fitted into the connector through hole 26 of the rear case 6.
  • the detection circuit base The plate 21 is held in a positioned state by the rear case 6.
  • the positioning projection 36 that protrudes to the rear side of the spacer 35 is fitted into the positioning hole 23 of the detection circuit board 21.
  • the spacer 35 is held in a positioning state with respect to the detection circuit board 21.
  • the rear surface of the display circuit board 32 is pressed against the front end face of the spacer 35 while the positioning protrusion 37 protruding to the front side of the spacer 35 is fitted in the positioning hole 38 of the display circuit board 32.
  • the board connecting connectors 27 and 40 of the boards 21 and 32 are fitted together, whereby the boards 21 and 32 are mechanically and electrically connected to each other.
  • the detection circuit board 21 is held in a positioning state with respect to the spacer 35.
  • the rear surface of the diffusing member 31 is attached to each positioning hole 44 of the diffusing member 31 while the tip of the positioning projection 37 of the spacer 35 penetrating the display circuit board 32 is fitted to the display circuit board 32. Press on the front. Thereby, the diffusing member 31 is held in the positioned state. Then, the wiring member 49 is fitted into the wiring member mounting portion 48 of the diffusing member 31, and the diffusion film 46 is placed on the LCD mounting portion 45, and the LCD 30 is fitted over the diffusing film 46. On the other hand, after attaching the nameplate 9 to the rear surface of the display cover 8, the display cover 8 is fitted to the window portion 7 of the front case 5 with a rear force.
  • the front case 5 is also applied to the pressure detection means 3 and the display means 4 assembled on the rear case 6 with a front force, and the locking claw 13 of the rear case 6 is engaged with the locking hole 14 of the front case 5. .
  • the wiring member 49 and the base portion 55 of the button member 54 are compressed from the front and back, and due to the repulsive force, each part of the diffusion member 31, the display circuit board 32, the spacer 35, and the detection circuit board 21 is rear. Pressed to the case 6 side, the LC D30 and the display cover 8 are pressed forward. This restricts the diffusing member 31, the display circuit board 32, the spacer 35, and the detection circuit board 21 from being displaced in the direction in which the positioning protrusions 16, 36, 37 are pulled out.
  • the assembly of the pressure sensor 1 is completed.
  • the pressure sensor 1 of the present embodiment is completed by sequentially assembling the respective components with respect to the rear case 6, so that the assembling work is simple.
  • the rear case 6 and the pressure detection means 3, the pressure detection means 3 and the display means 4 are sequentially assembled using the positioning means (16, 35), respectively, Since the display case 4 and the pressure detection means 3 are sandwiched between the cases 5 and 6 by engaging the front case 5 and the rear case 6, assembly can be performed easily.
  • connection means between the boards 21 and 32 is constituted by the board connection connectors 27 and 40 mounted on the boards 21 and 32, the board connection connectors 27 and 40 are connected in advance to the boards 21 and 32, respectively. , 3 2 and 2 in the assembly process, the wiring between the two boards 21 and 32 can be done without soldering, just by fitting the two connectors 27 and 40 together. The preparation process is simplified.
  • the positioning projections 36, 37 of the spacer 35 are closely fitted into the positioning hole 23 of the detection circuit board 21 and the positioning hole 38 of the display circuit board 32, respectively, so that both the boards 21, 32 force Positioned relative to each other.
  • the positioning holes 23 and 38 of each substrate 21 and 32 can be formed with higher dimensional accuracy than the outer shape of the substrates 21 and 32. Therefore, compared with the case where each substrate is positioned using the outer shape, The positioning accuracy of both substrates 21 and 32 can be increased. Therefore, the pressure sensor 1 can be assembled smoothly.
  • the positioning projection 16 of the rear case 6 is tightly fitted into the positioning hole 22 of the detection circuit board 21 so that the detection circuit board 21 is held in the rear case 6 in a positioned state. Compared with the case where the detection circuit board 21 is positioned using its outer shape, the positioning accuracy of the detection circuit board 21 can be increased, so that the pressure sensor 1 can be assembled more smoothly.
  • the display circuit board 32 is provided with a pressing member (49, 54) that elastically presses the display circuit board 32 backward (in a direction opposite to the direction in which the front case 5 and the rear case 6 are clamped). Shaking of the base plate 32 is prevented.
  • a pressing member 49, 54
  • the pressing members (49, 54) are arranged separately on the upper and lower sides with the central portion on the surface of the substrate 32 interposed therebetween, compared with the case where the pressing members (49, 54) are provided only on one side.
  • the balance of pressing force is improved. Therefore, for example, it is possible to prevent a situation in which the work is difficult to perform due to tilting due to a biased pressing force during assembly.
  • the pressing member is configured by the button member 54 or the wiring member 49 which is an existing part, an increase in the number of parts can be prevented.
  • an LCD with a backlight is used as the display unit.
  • an LED or the like may be used as the display unit.
  • each means may be provided with a plurality of substrates.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

Selon la présente invention, lorsque des embases de positionnement (36, 37) d’un séparateur (35) sont bien ajustées dans à la fois un orifice de positionnement (23) d’une carte de circuit de détection (21) et un orifice de positionnement (38) d’une carte de circuit d’affichage (32), respectivement, les cartes (21, 32) se trouvent en place l’une par rapport à l’autre. En outre, lorsqu’une embase de positionnement (16) d’un boîtier arrière (6) est bien ajustée dans un orifice de positionnement (22) de la carte de circuit de détection (21), cette carte (21) est maintenue en place par le boîtier arrière (6). Après assemblage successif d’un moyen de détection de pression (3), d’un moyen d’affichage (4), etc. au boîtier arrière (6), un boîtier avant (5) et le boîtier arrière (6) sont engagés l’un dans l’autre, ce qui permet de maintenir entre les deux boîtiers (5, 6) le moyen de détection de pression (3), le moyen d’affichage (4), etc. Un capteur de pression peut ainsi être facilement assemblé.
PCT/JP2005/019718 2005-06-30 2005-10-26 Capteur de pression WO2007004313A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-191221 2005-06-30
JP2005191221A JP4820588B2 (ja) 2005-06-30 2005-06-30 圧力センサ

Publications (1)

Publication Number Publication Date
WO2007004313A1 true WO2007004313A1 (fr) 2007-01-11

Family

ID=37604192

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/019718 WO2007004313A1 (fr) 2005-06-30 2005-10-26 Capteur de pression

Country Status (2)

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JP (1) JP4820588B2 (fr)
WO (1) WO2007004313A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016161346A (ja) * 2015-02-27 2016-09-05 パナソニック デバイスＳｕｎｘ株式会社 センサ
WO2022230698A1 (fr) * 2021-04-28 2022-11-03 長野計器株式会社 Dispositif de mesure de quantité physique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101309634B1 (ko) * 2012-04-02 2013-09-17 주식회사 뉴인스 산업용 계측기

Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH0530119Y2 (fr) * 1987-05-27 1993-08-02
JP5088770B2 (ja) * 2006-07-21 2012-12-05 ハイモ株式会社 抄紙用薬剤

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Publication number Priority date Publication date Assignee Title
JPS63188535A (ja) * 1987-01-28 1988-08-04 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPH0277834A (ja) * 1988-09-13 1990-03-16 Nec Corp マルチウィンドゥ表示装置
JPH08273505A (ja) * 1995-03-31 1996-10-18 Koganei Corp 検出スイッチ
JPH10239198A (ja) * 1997-02-21 1998-09-11 Omron Corp 電子機器の表示構造
JP4049234B2 (ja) * 1999-03-31 2008-02-20 シーケーディ株式会社 圧力スイッチ

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Publication number Priority date Publication date Assignee Title
JPH0530119Y2 (fr) * 1987-05-27 1993-08-02
JP5088770B2 (ja) * 2006-07-21 2012-12-05 ハイモ株式会社 抄紙用薬剤

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016161346A (ja) * 2015-02-27 2016-09-05 パナソニック デバイスＳｕｎｘ株式会社 センサ
WO2022230698A1 (fr) * 2021-04-28 2022-11-03 長野計器株式会社 Dispositif de mesure de quantité physique

Also Published As

Publication number Publication date
JP4820588B2 (ja) 2011-11-24
JP2007010466A (ja) 2007-01-18

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