WO2007004313A1

WO2007004313A1 - Pressure sensor

Info

Publication number: WO2007004313A1
Application number: PCT/JP2005/019718
Authority: WO
Inventors: Masakatsu Tamaoki
Original assignee: Sunx Limited
Priority date: 2005-06-30
Filing date: 2005-10-26
Publication date: 2007-01-11
Also published as: JP2007010466A; JP4820588B2

Abstract

When positioning projections (36, 37) of a spacer (35) are firmly fitted into both a positioning hole (23) of a detection circuit board (21) and a positioning hole (38) of a display circuit board (32), respectively, the boards (21, 32) are positioned to each other. Also, when a positioning projection (16) of a rear case (16) is firmly fitted into a positioning hole (22) of the detection circuit board (21), the detection circuit board (21) is held positioned by a rear case (6). After a pressure detection means (3), a display means (4), etc. are assembled to the rear case (6) in sequence, a front case (5) and the rear case (6) are engaged with each other, and as a result, the pressure detection means (3), display means (4), etc. are held between both cases (5, 6). Thus, a pressure sensor can be easily assembled.

Description

Specification

Pressure sensor

Technical field

[0001] The present invention relates to a pressure sensor.

Background art

[0002] As 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). Such 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.

[0003] However, in the above configuration, there is a problem that the assembly process becomes complicated because it is necessary to perform soldering for wiring between the boards in the middle of the process of assembling each component in the casing. It was. Therefore, the applicant of the present invention proposes a configuration in which each board is provided with a connector for connecting the board to be mounted before the assembly process, and wiring between the boards is performed by fitting the connectors of both boards through the assembly process. Has been. As a result, each component can be assembled without soldering, so that the assembly process can be simplified.

[0004] By the way, as described above, 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.

[0005] 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.

Disclosure of the invention

A liquid crystal display device according to the present invention 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.

[0007] Thereby, 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 positioning means, and then the front case and the rear case are engaged. As a result, the detection circuit board and the display circuit board are sandwiched between the two cases, so that assembly can be easily performed. In addition, since the 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.

[0008] Further, 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.

[0009] Thereby, 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. Further, 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.

[0010] In addition, 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.

[0011] Thereby, since the pressing member that positively presses the substrate is provided, rattling of the substrate is prevented. In order to prevent the substrate from rattling without this pressing member, for example, it is necessary to increase the dimensional accuracy of each component, which may increase manufacturing costs and make it difficult to take up the yarn. According to this configuration, it is possible to easily prevent the substrate from rattling.

[0012] Further, it is preferable that the pressing member is disposed separately on both sides of the central portion of the substrate surface. As a result, 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.

[0013] Further, it is preferable that 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. As a result, since the pressing member is constituted by a button member that is an existing component, an increase in the number of components can be prevented.

[0014] Further, 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. Thereby, since the pressing member is constituted by a wiring member which is an existing component, an increase in the number of components can be prevented.

[0015] Further, 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. A pressing member disposed between the LCD and the display circuit board and supporting the wiring member, and the pressing member disposed on both sides of the pressing member. It is desirable that the button member is provided with an operation portion that is exposed to the outer surface of the casing and can be pressed, and the other pressing member is formed of the wiring member. As a result, 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.

(The invention's effect)

[0016] 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. Thus, since the detection circuit board and the display circuit board are sandwiched between the two cases, the assembly can be easily performed. In addition, since 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.

Brief Description of Drawings

FIG. 1 is a front view of a pressure sensor according to an embodiment of the present invention.

[Figure 2] A-A line cross section of Figure 1

[Fig.3] B-B cross section of Fig.1

[Figure 4] Exploded side view of pressure sensor

[Figure 5] Front view of rear case [Figure 6] Front view of detection circuit board

[Figure 7] Front view of display circuit board

[Figure 8] Front view of spacer

[Figure 9] Front view of diffusion member

[Figure 10] Bottom view of button member

Explanation of symbols

1… Pressure sensor

2… Case

3… Pressure detection means

4 ... Display means

5 ... Front case

6 ... Rear case

7… Window

13 ... Locking claw

14 ... Locking hole

16 ... positioning protrusion (second positioning means)

17 ... Introduction

20… Pressure detection element

21 ... Detection circuit board

22, 23, 38 ... Positioning hole

27, 40… Board connector

30 -'LCD (Display)

32 ... Display circuit board

35 .. Spacer (first positioning means)

36, 37… Positioning protrusion

49… Wiring member (Pressing member)

54 ... Button member (Pressing member)

BEST MODE FOR CARRYING OUT THE INVENTION <Example 1>

Next, Embodiment 1 of the present invention will be described with reference to FIGS. In the following description, the front-rear direction is based on the front side of FIG. 1, the left side of FIG. 2 is the front, and the vertical direction is based on FIGS. 1 and 2.

[0020] As shown in Figs. 1 and 2, the pressure sensor 1 of the present embodiment includes a fluid in the casing 2.

It is configured to accommodate 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. In addition, 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.

As shown in FIGS. 2 to 5, the rear case 6 has a square shape when viewed from the front, and covers the rear surface of the pressure sensor 1. On the outer periphery of the front surface of the rear case 6, 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 (corresponding to the engaging means of the present invention) 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. In addition, 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.

[0023] 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. As shown in FIGS. 2, 3, and 6, 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. Further, 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. In addition, 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. .

[0025] 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.

As shown in FIG. 7, 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. As shown in FIGS. 3 and 8, 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. Further, 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. In addition, three switch parts 43 are arranged side by side at the lower end of the front surface of the display circuit board 32.

As shown in FIG. 9, the diffusing member 31 is formed into a square thick plate as a whole by a synthetic resin material. As shown in FIG. 3, 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.

[0029] 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. Since the distance between the electrode part 42 and the electrode part of the LCD 30 is larger, the wiring member 49 is compressed by both electrode parts and abuts on both electrode parts by the repulsive force. In addition, 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.

[0030] 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.

Next, an example of an assembly process of the pressure sensor 1 will be described with reference to FIGS.

[0032] In the SMT (Surface Mount Technology) process performed prior to this assembly process, 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.

In order to assemble the pressure sensor 1, first, 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. Then, 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. Along with this, 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. As a result, the detection circuit base The plate 21 is held in a positioned state by the rear case 6.

Subsequently, 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. As a result, the spacer 35 is held in a positioning state with respect to the detection circuit board 21. Then, 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. Along with this, 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. In addition, the detection circuit board 21 is held in a positioning state with respect to the spacer 35.

Next, 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. Finally, 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. . At this time, 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. It is held without being rattled in the state of being sandwiched between the two. Thus, the assembly of the pressure sensor 1 is completed. As described above, 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.

[0036] As described above, according to the present embodiment, 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.

[0037] Since the 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.

[0038] Also, 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.

[0039] Further, 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.

[0040] 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. In order to prevent the substrate from rattling without the pressing member, for example, it is necessary to increase the dimensional accuracy of each component, which may increase the manufacturing cost and may be difficult to assemble. For example, it is possible to easily prevent the substrate from rattling.

[0041] Further, since 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. [0042] Further, since 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.

[0043] The present invention is not limited to the embodiments described with reference to the above description and drawings.

For example, the following embodiments are also included in the technical scope of the present invention.

(1) In the above embodiment, an LCD with a backlight is used as the display unit. However, according to the present invention, an LED or the like may be used as the display unit.

(2) In the above embodiment, the pressure detecting means and the display means are each provided with a substrate. However, according to the present invention, each means may be provided with a plurality of substrates.

Claims

The scope of the claims

[1] A pressure sensor that detects and displays the pressure of the fluid to be measured,

A casing comprising a front case having a window and a rear case having an inlet for introducing the fluid to be measured;

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 introduction port;

A display circuit board having a display unit that is visible from the window and that is detected by the pressure detection unit; and a display unit that performs display control of the display unit; and the detection circuit board and the display circuit A board connector for connecting both boards by being mounted on each board and mating with each other;

And positioning means for positioning each of the detection circuit board and the display circuit board with respect to each other at least one of the front case and the rear case, and the front case and the rear case can be engaged with each other. Engaging means, and the front case and the rear case are engaged by the engaging means, whereby the detection circuit board and the display circuit board are located between the front case and the rear case. A pressure sensor, wherein the board connecting connectors of both boards are mechanically and electrically connected in a positioned state.

[2] The positioning means is tightly fitted into 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 the display A first positioning means for holding the circuit board in a positioning state, and the detection circuit are provided integrally with the rear case and tightly fitted in a positioning hole provided in the detection circuit board. The pressure sensor according to claim 1, further comprising second positioning means for holding the substrate in a positioning state.

[3] 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. A pressure sensor as set forth in claim 1 or claim 2 characterized by the above-mentioned.

[4] The pressing member is arranged separately on both sides of the central portion of the substrate surface. The pressure sensor according to claim 3, wherein the pressure sensor is provided.

5. The pressure sensor according to claim 3, wherein the pressing member is constituted by a button member having an operation portion that is exposed on an outer surface of the casing and can be pressed.

[6] The display unit is configured by an LCD housed inside the window unit,

The pressing member is constituted by a wiring member that electrically connects an electrode portion provided on the LCD and an electrode portion provided on the substrate surface,

4. The pressure sensor according to claim 3, further comprising a support member that is disposed between the LCD and the display circuit board and supports the wiring member.

[7] The display unit is configured by an LCD housed inside the window unit, and wiring that electrically connects the electrode unit provided on the LCD and the electrode unit provided on the substrate surface A member,

A support member disposed between the LCD and the display circuit board for supporting the wiring member;

The pressing member on one side among the pressing members arranged separately on the both side positions is constituted by a button member having an operation part exposed to the outer surface of the casing and capable of pressing operation, and the pressing member on the other side is the above-described pressing member. 5. The pressure sensor according to claim 4, comprising a wiring member.