CN205333241U - Pressure sensor - Google Patents

Abstract

The utility model provides a pressure sensor that can assemble the operation easily. Pressure sensor detects by the pressure of the measured flow body, possesses: the base part possesses the introducing port with being channeled into by the measured flow body, the pressure detection component is measured from the introducing port leading -inly by the pressure of the measured flow body, the circuit board, by range upon range of configuration on the base parts, installation pressure detection component on the circuit board, the diffusion parts, the configuration lies in one side opposite with the base parts pressing from both sides the circuit board, centre gripping circuit board between diffusion parts and base parts. Be provided with on the parts in the diffusion and keep the piece to what base parts side was extended, keeping being provided with inboard block portion between piece and the base parts, the local parts block that inclines with the another party of the parts of inboard block portion through making party's side to it is fixed with the diffusion parts with the base parts. The installation is fixed with cap spare on the base parts, and cap spare disposes in the outside of inboard block portion, suppresses the deformation that keeps the piece.

Description

Pressure transducer

Technical field

This utility model relates to pressure transducer。

Background technology

Patent Document 1 discloses a kind of to by pressure detecting element measurement to the pressure of measured fluid carry out the pressure transducer of numerical monitor。Such a pressure transducer is such as configured to: in the housing being made up of fore shell and base component, will be provided with each stacking part storages such as the circuit board of pressure detecting element, liquid crystal display component。

[prior art literature]

[patent documentation]

[patent documentation 1] Japanese Patent Laid-Open 10-142090 publication

But, as in above-mentioned such pressure transducer, the circuit board being provided with pressure detecting element becomes the position that the pressure detecting element to the pressure being subject to measured fluid supports, so needing to be firmly fixed at housing etc., in order to sustain the high pressure from measured fluid。Accordingly, as the method circuit board being provided with pressure detecting element being fixed on housing etc., it has to use the screw fixation or hot joint filling (Thermalcaulking) engineering method that can really fix。But, screw fixation or hot joint filling engineering method are the operation quite taken a lot of work, and can harm the simplification of pressure transducer assembling operation。

Utility model content

This utility model is made to solve the problems referred to above, its object is to provide a kind of pressure transducer easily carrying out assembling operation。

For realizing the pressure transducer of above-mentioned purpose, detect the pressure of measured fluid, possess: base component, possess the introduction part imported by measured fluid；Pressure detecting element, measures the pressure of the measured fluid imported from described introduction part；Circuit board, is configured and stacked at described base component, installs pressure detecting element on described circuit board；And fixing parts, it is arranged in and clips circuit board and be positioned at the side contrary with described base component, described circuit board is clamped between described fixing parts and described base component, described fixing parts arrange the maintaining part that oriented described base component side extends, holding section, inner side it is provided with between described maintaining part and described base component, holding section, described inner side is by making the local of parts of a side side engage with the parts of the opposing party side, thus described base component and described fixing parts are fixed, described base component is mounted with cover, described cover is arranged in the outside of holding section, described inner side, restraint measure has the deformation at the position of holding section, described inner side。

According to above-mentioned composition, base component, circuit board and fixing parts are stacked gradually, and by holding section, inner side by clipping the circuit board arrangement fixing parts in the side contrary with base component and base component engaging, by such simple motion, circuit board can be fixed on fixing parts。Further, by making the cover being fixed on base component be positioned at the outside of holding section, inner side, thus restriction arranges the deformation at the position of holding section, inner side, it is specially the deformation opening direction laterally。When releasing the fastening state of holding section, inner side, Direction distortion must be opened toward outside in the position being provided with holding section, inner side, and this deformation is suppressed owing to being subject to cover compacting, thus the engaging releasing holding section, inner side becomes extremely difficult。Its result, is clipped circuit board and fixing parts and base component is fixed by engaging, for holding easy-to-assemble fixed structure, is also the firm fixed structure that can bear the pressure produced from fluid。

In the above-described configuration, holding section, preferred described inner side possesses engagement pawl and engaging recessed part, described engagement pawl is arranged at described maintaining part, prominent to described base component side, described engaging recessed part is arranged at described base component, engage with described engagement pawl, described maintaining part is provided with auxiliary engaging recessed part, described auxiliary engaging recessed part is adjacent with the base end side of described engagement pawl, to described base component side opening, described base component is provided with auxiliary engagement pawl, and described auxiliary engagement pawl is inserted into described auxiliary engaging recessed part。

In this case, in order to release the engaging of holding section, inner side, it is necessary to make to be provided with the position distortions of internal fitting portion reach the engaging width of engagement pawl and engaging recessed part and insert recess with more than the sum total engaging width assisting engagement pawl。Therefore, the engaging that will release holding section, inner side is extremely difficult。It addition, compared with the situation of the side omitting engagement pawl and auxiliary engagement pawl and only single engagement pawl, can ensure that the engaging width of same degree by the pawl length of about half。Therefore, holding section, inner side and then the degree of freedom that adherence pressure sensor is in design can be set in less space。Particularly easily realize the miniaturization of sensor。

In the above-described configuration, it is preferable that described cover is provided with installation portion, described installation portion is used for fixedly mounting assisted tool, and described installation assisted tool is for being mounted to mounting object by pressure transducer。Particularly, described installation portion is arranged at the wall portion in the outside being positioned at holding section, described inner side of described cover。

In this case, when being mounted with to install assisted tool, assisted tool is installed and is positioned at the outside of cover。Therefore, when inside being provided with, the position of holding section wants to open Direction distortion toward outside, cover becomes extremely difficult toward the deformation of equidirectional。Its result, has the effect of the deformation at the position of holding section, inner side to improve by cover restraint measure。

In the above-described configuration, preferably in being provided with holding section, outside between described base component and described cover, holding section, described outside is by making the local of parts of a side side engage with the parts of the opposing party side, thus described base component and described cover being fixed, holding section, described outside is arranged on the face identical with the face arranging holding section, described inner side of described base component。

In this case, on packing engineering, during by fixing stacking part, and install cover time, it is only necessary to toward be provided with inner side holding section and outside fitting portion carry out operation facing to the same side, so can easily assemble。

In the above-described configuration, it is preferable that described base component is provided with flange, described flange be positioned at the edge of the described base component side with described cover to position。

In this case, it is difficult to occur article imprudence to hook and cause that to the end of cover cover is from problems such as base component drop。

In the above-described configuration, described flange is provided with dismounting recess, when to be taken off by described cover from described base component, tool is inserted described dismounting recess。

In this case, even if in the intensity in order to improve the fixed structure based on holding section, inner side, when cover is firmly secured on base component, it is possible to by using tool, simply cover is taken off from base component。By dismounting position is set as recess, it is difficult to occur article imprudence to hook and cause that to dismounting position cover is from problems such as base component drop。

In the above-described configuration, edge in the described base component side of described cover, on the direction of this edge, in the position that the position with the outside being positioned at holding section, described inner side of described cover is overlapping, the protuberance that oriented described base component side is prominent is set。

In this case, the distance from the part overlapping with holding section, inner side to this edge on cover is elongated。Therefore, when inside being provided with, the position of holding section wants to open Direction distortion toward outside, cover to be difficult to deform to the direction。It as a result, it is possible to increase there is the deformation at the position of holding section, inner side by cover restraint measure。

Utility model effect

According to pressure transducer of the present utility model, it is possible to easily carry out assembly working。

Accompanying drawing explanation

Fig. 1 is the axonometric chart of pressure transducer。

Fig. 2 is the exploded perspective view of the local (base component, circuit board and proliferation part) of pressure transducer。

Fig. 3 is the axonometric chart of the local (base component, circuit board and proliferation part) of pressure transducer。

Fig. 4 is the exploded perspective view of pressure transducer。

Fig. 5 is the profile of the 5-5 line along Fig. 1。

Fig. 6 is the profile of the 6-6 line along Fig. 1。

Fig. 7 is the profile of the 7-7 line along Fig. 1。

Fig. 8 is the explanation figure of the installation about pressure transducer。

Description of reference numerals

10 pressure transducers；20 base components；25 slots；25a engaging recessed part；25b assists engagement pawl；30 circuit boards；31 pressure detecting elements；40 proliferation parts (fixing parts)；48 retention tabs (maintaining part)；48a engagement pawl；48b assists engaging recessed part；70 covers

Detailed description of the invention

Hereinafter, illustrate for the embodiment that this utility model is embodied as the pressure transducer possessing liquid crystal display component。

As shown in Figures 1 and 2, pressure transducer 10 possesses plastic base component 20。Base component 20 is formed as there is corner, end box like, possesses: the rear wall 21 of corner tabular；1st medial wall 22, along rear wall 21 a side side to both sides uprightly arrange；And the 2nd medial wall 23, along rear wall 21 the opposing party side to both sides uprightly arrange。

Circumference at rear wall 21 is provided with the flange 24 prominent from the 1st medial wall, medial wall the 22 and the 2nd 23。Central part on each limit of flange 24 is provided with recess 24a。Central part at rear wall 21 is provided with the introducing port 21a of drum, and this introducing port 21a is used for flowing into measured fluid。On rear wall 21, the avris cutting by rear wall 21 is provided with connecting hole 21b。

As shown in figures 2 and 5, the slot 25 extended from the edge of open side it is provided with at the outer surface central part of the 1st medial wall 22。Being provided with engaging recessed part 25a in slot 25, this engaging recessed part 25a extends along the opening edge of the 1st medial wall 22, and by through for the 1st medial wall 22。Slot 25 is provided with auxiliary engagement pawl 25b, this auxiliary engagement pawl 25b prominent along the edge of engaging recessed part 25a toward side, outside。Auxiliary engagement pawl 25b be formed as width along with the cross section broadened gradually towards snap portions 25a side be roughly triangular shape。

As shown in Figures 2 and 6, the outer surface in the 1st medial wall 22 is provided with 2 engaging teat 22a, and 2 engaging teat 22a are positioned at the both sides along the slot 25 on the direction of opening edge。And, on the flange 24 of the 1st medial wall 22, in the position overlapping with each engaging teat 22a, it is provided with dismounting recess 26。

As shown in Fig. 2 and Fig. 5～Fig. 7, on the 1st medial wall 23, medial wall the 22 and the 2nd of base component 20, it is configured with circuit board 30, this circuit board 30 is formed the testing circuit etc. for detecting pressure。The peripheral shape that the outer shape of circuit board 30 is formed as the 1st medial wall 23, medial wall the 22 and the 2nd with base component 20 is substantially uniform, a part at the periphery of circuit board 30 is provided with recess 30a, and this recess 30a is corresponding with the slot 25 being arranged at the 1st medial wall 22。

Central part at the lower surface (face of base component 20 side) of circuit board 30 is provided with pressure detecting element 31。As shown in Figure 5 and 7, pressure detecting element 31 possesses the introduction part 31a of the tubular prominent to base component 20 side, is provided with O 32 between this introduction part 31a and base component 20。Lower surface at circuit board 30 is provided with external connection adapter 33。The fore-end of external connection adapter 33 is fitted together to the connecting hole 21b to base component 20。In each profile shown in Fig. 5～Fig. 7, pressure detecting element 31, external connection adapter 33 etc. are arranged on the simplification of the parts on circuit board 30 and illustrate。

As shown in Figure 2 to 7, upper surface side (side contrary with base component 20) at circuit board 30 stacks gradually and is configured with proliferation part 40 and liquid crystal display component 50, and liquid crystal display component 50 shows by the testing result that pressure detecting element 31 detects。In the present embodiment, proliferation part 40 is equivalent to supporting parts。

Proliferation part 40 is created as the plastic parts of corner tabular, has the profile roughly the same with circuit board 30。Central part at proliferation part 40 is provided with the diffusion peristome 41 of long square shape。As it is shown on figure 3, the display such as the LED being arranged on circuit board 30 luminous component 34 of (backlight is used) is positioned at the opening portion of diffusion peristome 41。The light sent from luminous component 34 is spread towards liquid crystal display component 50 by proliferation part 40 on diffusion peristome 41。

As shown in Fig. 3～Fig. 7, being formed and insert hole 42 along the long limit 41a adapter extended between long limit 41a and the circumference of proliferation part 40 of a side side of the diffusion peristome 41 on proliferation part 40, this adapter inserts hole 42 by through for proliferation part 40。Inserting in hole 42 at this adapter and be inserted with elastomeric connector 35, liquid crystal display component 50 is electrically connected to circuit board 30 by this elastomeric connector 35。Elastomeric connector 35 is to be formed as flat parts by having elastic conductive rubber and electro-insulating rubber interaction cascading, the end side of elastomeric connector 35 is connected with the electrode being arranged on circuit board 30, and another side of elastomeric connector 35 is connected with the electrode portion of liquid crystal display component 50。

As shown in Fig. 3 and Fig. 7, on proliferation part 40, clip diffusion peristome 41 and be positioned at the side contrary with adapter insertion hole 42, and the position near the central authorities of the long limit 41b of the opposite side of diffusion peristome 41, it is formed with the elastic supporting part 43 for supporting liquid crystal display component 50。Elastic supporting part 43 is formed as the part 2 bridge like connected at its two ends of long corner tabular, is able to the position bent at above-below direction (thickness direction)。

In detail, diffusion peristome 41 side at elastic supporting part 43, it is provided with the long limit 41b of the opposite side along diffusion peristome 41 gap 44 extended, and the side contrary with diffusion peristome 41 of elastic supporting part 43 is provided with section differencen part and divides 45, this section differencen part divide 45 on above-below direction (thickness direction) than elastic supporting part 43 toward next section。Dividing 45 by this gap 44 and section differencen part, elastic supporting part 43 is formed as the long corner plate portion 2 bridge like being connected at its two ends。The lower face side (circuit board 30 side) of elastic supporting part 43 is formed with depression, and then promotes its flexibility。And, the central part at elastic supporting part 43 is provided with upward the bellying 43a that (side contrary with circuit board 30) bloats。

As shown in Figure 6, on proliferation part 40, dividing 45 by section differencen part and the part of step-down becomes button mount 46, button mount 46 is used for installing button parts 60 described later。Periphery at proliferation part 40 is provided with the abutment wall 47 being uprightly installed on upside (side contrary with circuit board 30) and is uprightly installed on the retention tab 48 of downside。

As shown in Figures 2 and 3, the position of the corner tabular of the central part on the both sides being positioned at the 1st medial wall 22 same side with base component 20 that retention tab 48 is disposed in the periphery of proliferation part 40, is housed in the slot 25 on the 1st medial wall 22 being arranged at base component 20。It is provided with the engagement pawl 48a that inner surface side bloats in the inside front ends portion of retention tab 48。Engagement pawl 48 is formed as the nearly triangle of section that width broadens gradually along with the base end side towards retention tab 48。At the base end side of the engagement pawl 48a of retention tab 48, it is provided with through the auxiliary engaging recessed part 48b of retention tab 48。

As it is shown in figure 5, the engagement pawl 48a being arranged on retention tab 48 is inserted in the engaging recessed part 25a on the 1st medial wall 22 being arranged on base component 20。The auxiliary engagement pawl 25b being arranged on the 1st medial wall 22 is inserted in the auxiliary engaging recessed part 48b being arranged on retention tab 48。In the present embodiment, engagement pawl 48a and engaging recessed part 25a, auxiliary engagement pawl 25b and auxiliary engaging recessed part 48b holding section, inner side is constituted。

As shown in Figure 4 to 7, it is configured with liquid crystal display component 50 and button parts 60 in the upper surface side (side contrary with circuit board 30) of proliferation part 40。Liquid crystal display component 50 is integrally formed as growing dimetric parts, overlaps with the diffusion peristome 41 of proliferation part 40。As it is shown in fig. 7, the long side of a side in the back side of liquid crystal display component 50 be formed integrally with electrode portion, the elastomeric connector 35 that this electrode portion inserts hole 42 prominent with the adapter from proliferation part 40 is connected。The central part of the long side of the opposing party at the back side of liquid crystal display component 50 abuts with the bellying 43a of the elastic supporting part 43 on proliferation part 40。So, the long side entirety of a side at the back side of liquid crystal display component 50 is supported by elastomeric connector 35, and the central part of the long side of the opposing party is supported by elastic supporting part 43。

As shown in Fig. 1 and Fig. 4, pressure transducer 10 possesses the plastic cover 70 covered on outside base component 20。Cover 70 is formed as there is corner, end box like, possesses: the antetheca 71 of corner tabular；From a side side of antetheca 71 to the 1st lateral wall 72 that uprightly arranges, both sides；And from the opposing party side of antetheca 71 to the 2nd lateral wall 73 that uprightly arranges, both sides。

Arranging fenestrate portion 71a on antetheca 71, window portion 71a is used for being visually confirmed to be liquid crystal display component 50。As shown in Fig. 5～Fig. 7, it is provided with the window portion 71a transparency cover 71b covered in the inner side of antetheca 71, this transparency cover 71b abuts with liquid crystal display component 50, liquid crystal display component 50 is pressed, thus liquid crystal display component 50 is fixed between transparency cover 71b and elastomeric connector 35 and elastic supporting part 43。Being provided with button peristome 71c on antetheca 71, this button peristome 71c is for making the button part of button parts 60 expose。

As shown in Figure 4, the 1st lateral wall 73, lateral wall the 72 and the 2nd of cover 70 is all formed as long quadrangle, and the middle body in its opening edge side arranges the protuberance 74 that oriented opening edge side is prominent。Being provided with two the outside engaging recessed part 72a run through the 1st lateral wall 72 on the 1st lateral wall 72, two outside engaging recessed part 72a lay respectively at the both sides along the protuberance 74 on the direction of opening edge。The both sides of antetheca 71 side on the outer surface of the 2nd lateral wall 73 are provided with the 1st installation portion 75a of two channel-shaped, and the central part in the opening edge side of the outer surface of the 1st lateral wall 72 is provided with the 2nd installation portion 75b of channel-shaped。

As shown in Figures 5 and 6, the 1st lateral wall 72 of cover 70 is positioned at the 1st medial wall 22 of base component 20 and the outside of the retention tab 48 of proliferation part 40, abuts or near the 1st medial wall 22 and retention tab 48。As shown in Fig. 1 and Fig. 4～Fig. 6, the edge of the open side of the 1st lateral wall 73, lateral wall the 72 and the 2nd on cover 70 be configured to flange 24 with base component 20 to, and substantially flush with the side face of the flange 24 of the 1st lateral wall 73, lateral wall the 72 and the 2nd。The protuberance 74 being arranged on the 1st lateral wall 72 and the second lateral wall 73 is inserted in the recess 24a on the flange 24 of the 1st medial wall 23, medial wall the 22 and the 2nd being arranged on base component 20。As it is shown in fig. 7, the protuberance 74 of the 1st lateral wall 72 is arranged at the position overlapping with the position being positioned at outside retention tab 48 of the 1st lateral wall 72 on the direction along the edge of open side。As shown in Figure 6, in the outside engaging recessed part 72a being arranged on the 1st lateral wall 72, it is inserted with the engaging teat 22a on the 1st medial wall 22 being arranged on base component 20。In the present embodiment, engaging teat 22a and outside engaging recessed part 72a holding section, outside is constituted。

It follows that the example for the packing engineering of the pressure transducer 10 of present embodiment illustrates。

First, the circuit board 30 being provided with each parts such as pressure detecting element 31, external connection adapter 33 is layered in above the 1st medial wall 23, medial wall the 22 and the 2nd of base component 20。Now, as shown in Figure 5, O 32 is installed between the introduction part 31a and base component 20 of the pressure detecting element 31 being installed on circuit board 30, and the fore-end of the external connection adapter 33 being arranged on circuit board 30 is fitted together to the connecting hole 21b to base component 20。

Afterwards, make the slot 25 that the retention tab 48 of proliferation part 40 is positioned on the 1st medial wall 22 being arranged on base component 20, then on circuit board 30 stacking proliferation part 40。Now, as Fig. 5 shows, retention tab 48 will elastic deformation and open toward outside, the engagement pawl 48a of retention tab 48 is inserted into engaging recessed part 25 and then the engaging of the 1st medial wall 22。Meanwhile, the auxiliary engagement pawl 25b of the 1st medial wall 22 is inserted into auxiliary engaging recessed part 48b and then the engaging of retention tab 48。Therefore, proliferation part 40 is fixed on base component 20, and circuit board 30 is fixed on base component 20 when being held between base component 20 and proliferation part 40。

Next, adapter at proliferation part 40 inserts and inserts elastomeric connector 35 in hole 42, when the end making elastomeric connector 35 highlights from adapter insertion hole 42, stacking liquid crystal display component 50 on the elastic supporting part 43 of elastomeric connector 35 and proliferation part 40。Now, by making the edge inner surface against abutment wall 47 of liquid crystal display component 50, thus liquid crystal display component 50 being positioned on proliferation part 40。The button mount 46 of proliferation part 40 is installed button parts 60。

It follows that cover on base component 20 by the cover 70 being mounted with transparency cover 71b, base component 20 is provided with circuit board 30 and proliferation part 40 etc.。Now, as shown in Figure 6, the engaging teat 22a being arranged on the first medial wall 22 of base component 20 is inserted into the outside engaging recessed part 72a and then engaging that are arranged on the 1st lateral wall 72。Meanwhile, as it is shown in figure 1, the protuberance 74 being arranged on the 1st lateral wall 73, lateral wall the 72 and the 2nd is inserted in the recess 24a on the 1st medial wall 23, medial wall the 22 and the 2nd being arranged on base component 20。Thereby, cover 70 is mounted on base component 20。

And, as it is shown in fig. 7, by being clamped between the transparency cover 71b and the elastic supporting part 43 of elastomeric connector 35 and proliferation part 40 that are installed on cover 70, liquid crystal display component 50 is fixed, and by being clamped between proliferation part 40 and cover 70, button parts 60 is fixed。Being completed of pressure transducer 10 like this。By the tools such as driver are inserted into the dismounting recess 26 being arranged on base component 20, the 1st lateral wall 73, lateral wall the 72 and the 2nd is made to bend, thus can easily be taken off by cover 70。

Further, the pressure transducer 10 of present embodiment, as following, it is installed on the mounting object of panel etc.。

As shown in Figure 8, the 71a side, window portion of cover 70 is set to face side, pressure transducer 10 is inserted into the installing port 80a of mounting object 80。Then, by the 1st install assisted tool 81 be installed to the side face of the part prominent to face side from mounting object 80 of pressure transducer 10, and by the 2nd install assisted tool 82 be installed to pressure transducer 10 rearwardly side highlight side face on。

1st installs assisted tool 81 is formed as the corner frame-shaped with the big outer shape of specific pressure sensor 10, within it a side of face side to two sides the 1st installation teat 81a is installed。It is engaged to the 1st installation portion 75a on the 2nd lateral wall 73 of the cover 70 being arranged on pressure transducer 10, thus the 1st installation assisted tool 81 is fixed on pressure transducer 10 by installing teat 81a by the 1st。

2nd installs assisted tool 82 is formed as the corner frame-shaped with the big outer shape of specific pressure sensor 10, within it a side of face side to two sides the 2nd installation teat 82a is installed。It is engaged to the 2nd installation portion 75b on the 1st lateral wall 72 of the cover 70 being arranged at pressure transducer 10, thus the 2nd installation assisted tool 82 is fixed on pressure transducer 10 by installing teat 82a by the 2nd。

Installing assisted tool 82 by being provided with the 1st installation assisted tool the 81 and the 2nd, be in and limit the state that pressure transducer 10 departs to face side and rear side relative to mounting object 80, pressure transducer 10 is fixed on mounting object 80。

It follows that the effect of notebook embodiment。

In the pressure transducer 10 of present embodiment, it is configured on the proliferation part 40 of base component 20 opposition side clipping circuit board 30 retention tab 48 that oriented base component 20 side extends is set。And, by holding section, inner side (engagement pawl 48a and engaging recessed part 25a and auxiliary engagement pawl 25b and the auxiliary engaging recessed part 48b) engaging that will arrange between retention tab 48 and base component 20, thus proliferation part 40 is fixed on base component 20, and when being held between base component 20 and proliferation part 40, circuit board 30 is fixed on base component 20。Therefore, base component 20, circuit board 30 and proliferation part 40 are stacked gradually, and by holding section, above-mentioned inner side, base component 20 and proliferation part 40 are engaged, by such simple operation, it is possible to circuit board 30 is fixed on base component 20。

In this fixed structure, retention tab 48 opens Direction distortion toward outside, and when its deflection has exceeded the engaging width of holding section, above-mentioned inner side, the engaging of holding section, inner side is released from, and fixing on base part 20 of circuit board 30 is released from。The engaging width of holding section, inner side is the summation of the width of the width with the engaging recessed part 25a part engaged on engagement pawl 48a and the part with auxiliary engaging recessed part 48b locking on auxiliary engagement pawl 25b。

Therefore, by making the local (the 1st lateral wall 72) of the cover 70 being arranged on base component 20 to protect circuit board 30 grade be positioned at the outside of retention tab 48, retention tab 48 can be suppressed toward outside to open the deformation in direction。Thereby, under the situation being provided with cover 70, the engaging of holding section, inner side becomes to be difficult to release。Its result, the circuit board 30 fixed structure on base component 20, base component 20, circuit board 30 and proliferation part 40 are stacked gradually, and make base component 20 and proliferation part 40 engage by holding section, above-mentioned inner side, it is hold easy-to-assemble fixed structure, and is the firm fixed structure that can bear the pressure from measured fluid。

It follows that record the effect about present embodiment。

(1) detect the pressure transducer 10 of the pressure of measured fluid, possess: base component 20, there is the introducing port 21a imported by measured fluid；Pressure detecting element 31, detects the pressure from the introducing port 21a measured fluid imported；Circuit board 30, is configured and stacked on base component 20, installs pressure detecting element 31 on circuit board 30；And proliferation part 40, clip circuit board 30 and be arranged in the opposition side of base component 20, clamping circuit board 30 between proliferation part 40 and base component 20。Proliferation part 40 is provided with the retention tab 48 extended toward base component 20 side, holding section, inner side (engagement pawl 48a and engaging recessed part 25a and auxiliary engagement pawl 25b and auxiliary engaging recessed part 48b) it is provided with between retention tab 48 and base component 20, holding section, inner side is by being engaged to another parts by a part for parts, thus base component 20 and proliferation part 40 being fixed。Being mounted with cover 70 on base component 20, cover 70 is arranged in the outside of holding section, inner side, it is suppressed that retention tab 48 deforms。

According to above-mentioned composition, can easily carry out assembling operation, particularly circuit board 30 is fixed to the assembling operation on base component 20。

(2) holding section, inner side possesses engagement pawl 48a and engaging recessed part 25a, engagement pawl 48a are arranged in retention tab 48, and prominent to base component 20 side, engaging recessed part 25a is located on base component 20, and engaging recessed part 25a engages with engagement pawl 48a。And, retention tab 48 is provided with auxiliary engaging recessed part 48b, the base end side of auxiliary engaging recessed part 48b and engagement pawl 48a is adjacent, to base component 20 side opening, and is provided with the auxiliary engagement pawl 25b being inserted into auxiliary engaging recessed part 48b on base component 20。

When above-mentioned composition, in order to release the engaging of holding section, inner side, retention tab 48 must be made to deform and reach inner side holding section engaging width more than, in other words necessarily on engagement pawl 48a with engaging recessed part 25a locking part width and auxiliary engagement pawl 25b on auxiliary engaging recessed part 48b locking part width total more than。Therefore, the engaging of holding section, inner side is difficult to be released from。

According to above-mentioned composition, with the side omitting engagement pawl 48a and auxiliary engagement pawl 25b and compared with being provided only with the situation of an engagement pawl, the engaging width of equal extent can be guaranteed by approximately half of pawl length。Therefore, holding section, inner side and then the degree of freedom that adherence pressure sensor 10 is in design can be set in less space。Particularly easily realize the miniaturization of pressure transducer 10。

(3) base component 20 is formed as having by the corner box like of the 1st medial wall 23, medial wall the 22 and the 2nd two groups relative, and holding section, inner side is positioned only at the relative sidewall of a side, namely between the 1st medial wall 22 and retention tab 48。

According to above-mentioned composition, by being limited at the position arranging holding section, inner side between the 1st medial wall 22 and the retention tab 48 of base component 20, thus can ensure that the intensity of fixed structure by holding section, inner side, and production cost can be suppressed。

(4) in the 1st lateral wall 72 of cover 70, the wall portion outside the retention tab 48 of proliferation part 40 that is namely positioned at the 2nd installation portion 75b is set, the used with when pressure transducer 10 is installed to mounting object 80 for the 2nd installation portion 75b the 2nd installs assisted tool 82 engages。

According to above-mentioned composition, when installing the 2nd installation assisted tool 82, the 2nd installs the outside that assisted tool 82 is positioned at the 1st lateral wall 72 of cover 70。Therefore, when opening Direction distortion outside the retention tab 48 of proliferation part 40 is sick for, cover 70 is difficult in company with equidirectional deformation。Its result, suppresses the effect promoting of the deformation of retention tab 48 by cover 70。

(5) being provided with holding section, outside (engaging teat 22a and outside engaging recessed part 72a) between base component 20 and cover 70, outside this, base component 20 and cover 70 are fixed by holding section by making the parts of a side side engage with the opposing party's sidepiece part。Outside fitting portion is arranged on the face identical with the face being provided with holding section, inner side of base component 20。

According to above-mentioned composition, in packing engineering, during by proliferation part 40 stacking, and close the lid parts 70 time, as long as holding section, inner side being provided with and the same side that faces of holding section, outside carries out operation, so can easily assemble。

(6) on base component 20, be provided with flange 24, this flange 24 be configured to the edge of base component 20 side with cover 70 to。

According to above-mentioned composition, the end of flange 24 and cover 70 to, thus being not susceptible to article imprudence to hook to the end of cover 70 problem causing that cover 70 drops etc. from base component 20。

(7) on flange 24, it is provided with dismounting recess 26, when to be taken off by cover 70 from base component 20, tool is inserted into dismounting recess 26。

According to above-mentioned composition, in order to improve the intensity of the fixed structure undertaken by holding section, inner side, and when cover 70 is firmly fixed at base component 20, it is also possible to by using tool to be taken off by cover 70 from base component 20 easily。Further, dismounting position being set as recess, causing to dismounting position cover 70 from problems such as base component 20 drop thus being difficult to occur article imprudence to hook。

(8) in the edge of the open side of the 1st outer wall 72, in the direction along this edge, in the position that the position with the outside being positioned at retention tab 48 of the 1st outer wall 72 is overlapping, the protuberance 74 that oriented base component 20 side is prominent is set。

According to above-mentioned composition, the distance from the part overlapping with retention tab 48 to edge on cover 70 can be elongated。Therefore, retention tab 48 is when being sick for outside and opening Direction distortion, and the 1st outer wall 72 is difficult to make to deform with equidirectional in the same direction。Its result, suppresses the effect that retention tab 48 deforms to improve by cover 70。

(9) proliferation part 40 used on the pressure transducer 10 possess liquid crystal display component 50 is used as fixing parts。

According to above-mentioned composition, can suppression component quantity increase。

It addition, above-mentioned embodiment can change in the following manner and embody。

The concrete composition of holding section, inner side is not limited to above-mentioned embodiment。For example, it is also possible to be configured to, omit auxiliary engagement pawl 25b and auxiliary engaging recessed part 48b, or omit engagement pawl 48a and engaging recessed part 25a。It addition, replace the composition making the engaging of pawl and recess, it is also possible to be configured to make pawl engage with each other。

The length of the pawl of engagement pawl 48a can do suitable setting。From the viewpoint that the engaging width guaranteeing holding section, inner side is bigger, it is set as such length: when engaging, the position consistency of the inner surface of the front end (front end of projected direction) of the pawl of engagement pawl 48a and the 1st medial wall 22 of base component 20。Further, from the viewpoint of miniaturization, it is set as below such length: when engaging, the position consistency of the inner surface of the front end (front end of projected direction) of the pawl of engagement pawl 48a and the 1st medial wall 22 of base component 20。The engaging recessed part 25a engaged with engagement pawl 48a is not required to through hole。This point, is also the same about auxiliary engagement pawl 25b。

Can also being configured to, the periphery of the 2nd side, medial wall 23 of the base component 20 on proliferation part 40 is also provided with retention tab 48, is also provided with holding section, inner side between the 2nd medial wall 23 of base component 20。

The retention tab 48 (maintaining part) being arranged on proliferation part 40 is not limited to lamellar。For example, it is also possible to be the wall-like along the part among each limit of proliferation part 40 or all upright settings。

In the above-described embodiment, the retention tab 48 being arranged on proliferation part 40 is positioned at the outside of the 1st medial wall 22 of base component 20 but it also may be located at the inner side of the 1st medial wall 22。In this case, cover 70 suppresses the 1st medial wall 22 to open the deformation in direction toward outside。

The proliferation part 40 used in the pressure transducer 10 possess liquid crystal display component 50 is used as fixing parts but it also may except proliferation part 40, the fixing parts forming holding section, inner side are set between base component 20。

The outside fitting portion arranged between base component 20 and cover 70 can also be arranged on the face different from the face being provided with holding section, inner side of base component 20。In this case, the deformation direction of the cover 70 that engaging in order to release holding section, outside is required and to release the deformation direction (deformation direction of retention tab 48) of the required proliferation part 40 of the engaging of holding section, inner side different, institute so that the power in direction that the engaging of holding section, inner side releases will not become releasing outside the power in direction of engaging of holding section。Therefore, by the engaging of holding section, inner side, fixed structure becomes more to consolidate。

The holding section, outside being arranged between base component 20 and cover 70 can also be omitted。For example, it is also possible to be configured to, constituted base component 20 by the multiple dividing bodies being internally formed receiving space, make these dividing bodies engage with each other。

In cover 70, it is also possible to change the position that the 1st installation portion 75a and the 2nd installation portion 75b is set。Among 1st installation portion 75a and the 2nd installation portion 75b, as long as at least one is arranged on the 1st lateral wall 72 (being positioned at the wall portion outside the retention tab 48 of proliferation part 40) of cover 70, when being mounted with that the 1st installation assisted tool the 81 or the 2nd installs assisted tool 82, the effect suppressing retention tab 48 to deform by cover 70 can be improved。Other, from obtaining significant effect viewpoint, the 1st installation portion 75a and the 2nd installation portion 75b is arranged at the position outside retention tab 48 that is positioned at of the 1st lateral wall 72, or than the position near open side, this position。

Replace plastic base component 20, it is also possible to metal base component 20。In this case, between base component 20 and circuit board 30, insulating element is configured。

In the above-described embodiment, although be embodied as the pressure transducer 10 possessing liquid crystal display component 50, it is also possible to for there is no the pressure transducer 10 of liquid crystal display component 50。In this case, replace proliferation part 40, the fixing parts forming holding section, inner side are set between base component 20。

Claims (8)

1. a pressure transducer, detects the pressure of measured fluid, it is characterised in that possess:

Base component, possesses the introduction part imported by measured fluid；

Pressure detecting element, measures the pressure of the measured fluid imported from described introduction part；

Circuit board, is configured and stacked at described base component, installs pressure detecting element on described circuit board；And

Fixing parts, are arranged in and clip circuit board and be positioned at the side contrary with described base component, clamp described circuit board between described fixing parts and described base component,

Described fixing parts arrange the maintaining part that oriented described base component side extends,

Being provided with holding section, inner side between described maintaining part and described base component, holding section, described inner side is by making the local of parts of a side side engage with the parts of the opposing party side, thus described base component and described fixing parts are fixed,

Being mounted with cover on described base component, described cover is arranged in the outside of holding section, described inner side, it is suppressed that be provided with the deformation at the position of holding section, described inner side。

2. pressure transducer according to claim 1, it is characterised in that

Holding section, described inner side possesses engagement pawl and engaging recessed part, and described engagement pawl is arranged at described maintaining part, and prominent to described base component side, described engaging recessed part is arranged at described base component, engages with described engagement pawl,

Described maintaining part is provided with auxiliary engaging recessed part, and described auxiliary engaging recessed part is adjacent with the base end side of described engagement pawl, to described base component side opening, described base component is provided with auxiliary engagement pawl, and described auxiliary engagement pawl is inserted into described auxiliary engaging recessed part。

3. pressure transducer according to claim 1, it is characterised in that

Described cover is provided with installation portion, and described installation portion is used for fixedly mounting assisted tool, and described installation assisted tool is for being mounted to mounting object by pressure transducer。

4. pressure transducer according to claim 3, it is characterised in that

Described installation portion is arranged at the wall portion in the outside being positioned at holding section, described inner side of described cover。

5. the pressure transducer according to any one of Claims 1 to 4, it is characterised in that

Being provided with holding section, outside between described base component and described cover, holding section, described outside is by making the local of parts of a side side engage with the parts of the opposing party side, thus described base component and described cover are fixed,

Holding section, described outside is arranged on the face identical with the face arranging holding section, described inner side of described base component。

6. the pressure transducer according to any one of Claims 1 to 4, it is characterised in that

Described base component is provided with flange, described flange be positioned at the edge of the described base component side with described cover to position。

7. pressure transducer according to claim 6, it is characterised in that

Described flange is provided with dismounting recess, when to be taken off by described cover from described base component, tool is inserted described dismounting recess。

8. the pressure transducer according to any one of Claims 1 to 4, it is characterised in that

In the edge of the described base component side of described cover, on the direction of this edge, in the position that the position with the outside being positioned at holding section, described inner side of described cover is overlapping, the protuberance that oriented described base component side is prominent is set。