CN108267257A

CN108267257A - Pressure sensor

Info

Publication number: CN108267257A
Application number: CN201711327819.9A
Authority: CN
Inventors: 赖勇
Original assignee: Illinois Tool Works Inc
Current assignee: Illinois Tool Works Inc
Priority date: 2016-12-30
Filing date: 2017-12-13
Publication date: 2018-07-10
Anticipated expiration: 2037-12-13
Also published as: JP2018109625A; CN108267257B; CN208076082U; JP7020904B2; KR20180079196A; KR102471445B1

Abstract

This application discloses a kind of pressure sensor, including：Housing, the housing include upper shell and lower housing, and the setting of the upper shell and the lower housing to form a cavity volume between the upper shell and lower housing；Vibrating diaphragm, the vibrating diaphragm are arranged between the upper shell and lower housing, and the cavity volume is separated into upper cavity volume and lower cavity volume；Magnetic core, the magnetic core are moved with the movement of the vibrating diaphragm；The vibrating diaphragm includes supporter and the thin skin around the supporter, and the thin skin extends from the edge of the supporter；The magnetic core is carried by the supporter.Pressure sensor in the application has the advantages that small and is easily installed and dismantles.

Description

Pressure sensor

Technical field

This application involves a kind of sensors, are particularly used for the pressure sensing of the operating parameter of detection household electrical appliance Device.

Background technology

In some household electrical appliance such as washing machine, some operating parameters should be sensed in use, to ensure household The correct operation of electric appliance, such as to sense the distribution consistency degree of the clothes to be washed in washing machine basket and supply the pressure of water And/or water level, etc..

The pressure of water sensing and/or water level use pressure sensor in the prior art.Pressure sensor generally comprises rigidity Shell, the outer rigid housing accommodate the deformable film to air pressure sensitivity；Pressure sensor further includes magnetic core and coil, the magnetic core It is made of ferromagnetic material and by operationally with generating movement with the film with the deformation in response to film；The coil quilt The shell is fixed to, the movement in response to the magnetic core causes coil to form variable inductance inductor.The coil and electricity Appearance is combined into an oscillating circuit, and so as to the variation of the position in response to the magnetic core, the oscillating circuit can generate frequency change The electric oscillation signal of change.In use, the frequency of oscillation variation of electric signal can be become by the water level in household electrical appliance cylinder or basket Caused by changing.

However, the design of existing sensor is not without defect, for example, in order to reach its qualified index, existing biography Sensor mechanical structure so that its is relatively large sized.Since household electrical appliance volume has the trend of microminiaturization, this pressure sensing Device inconvenience is installed in the confined space of household electrical appliance.In addition, the arrangements of components of existing sensor internal is unsuitable for reducing sensing The size of device.And existing household electrical appliance have higher requirement to the convenience of the installation and removal of sensor.

Invention content

The first purpose of the application is to solve problem above by providing a kind of improved pressure sensor.

According to the application's in a first aspect, this application provides a kind of pressure sensor, including：Housing, the housing packet Upper shell and lower housing are included, the setting of the upper shell and the lower housing to be formed between the upper shell and lower housing One cavity volume；Vibrating diaphragm, the vibrating diaphragm are arranged between the upper shell and lower housing, and the cavity volume is separated into upper cavity volume With lower cavity volume；Magnetic core, the magnetic core are moved with the movement of the vibrating diaphragm；The vibrating diaphragm includes supporter and around the branch The thin skin of support body, the thin skin extend from the edge of the supporter；The magnetic core is carried by the supporter.

According to above-mentioned in a first aspect, the pressure sensor further includes coil, the coil is fixed to the housing On, the coil and the magnetic core cooperating, to form variable inductance inductor.

According to above-mentioned in a first aspect, the outer profile of the supporter has supporter outer diameter, the magnetic core has outside magnetic core Diameter, the supporter outer diameter are set equal to, are slightly larger than or are slightly less than the magnetic core outer diameter；Or the supporter outer diameter with The ratio between magnetic core outer diameter is between 0.85-1.6.

According to above-mentioned in a first aspect, the magnetic core is contacted with the supporter.

According to above-mentioned in a first aspect, the thin skin arches upward from the edge of the supporter initially towards the upper cavity volume, with Formation is arched upward portion.

According to above-mentioned in a first aspect, the vibrating diaphragm includes the sealing margin set around the thin skin, the sealing margin It is clamped between the upper shell and the lower housing, hermetically to separate the lower cavity volume and upper cavity volume；It is described thin The described of skin arches upward portion across between the edge of the supporter and the sealing margin.

According to above-mentioned in a first aspect, the thin skin is in the junction with the edge of the supporter and the sealing margin Start to arch upward, with the portion that arches upward described in formation.

According to above-mentioned in a first aspect, the edge of the supporter has transition region, the transition region is from the shape put down to arch Transition region on shape and/or from the transition region in thickness to thin thickness.

It is described according to above-mentioned in a first aspect, the pressure sensor further includes the compensation elastomeric element for the vibrating diaphragm Compensation elastomeric element is sandwiched between the lower housing and the vibrating diaphragm.

According to above-mentioned in a first aspect, the compensation elastomeric element is the elasticity for the supporter lower part for being arranged on the vibrating diaphragm Stick, the flexible rod are extended downwardly from the supporter and can be contacted with the bottom of the lower housing.

According to above-mentioned in a first aspect, the bottom of the lower housing is equipped with the protrude element of tubulose upwardly extended, the bullet Property stick be at least partially accommodated in the protrude element, the protrude element around the lower housing bottom on stream Body channel is set.

According to above-mentioned in a first aspect, the compensation elastomeric element is counterbalance spring, the counterbalance spring is sandwiched in the branch Between the bottom of support body and the lower housing.

According to above-mentioned in a first aspect, the magnetic core is cylindrical shape；The vibrating diaphragm is further included from the upper surface of the supporter The mounting bar extended；And the magnetic core is sleeved on the mounting bar.

According to above-mentioned in a first aspect, the lower end of the magnetic core is equipped with from the side of magnetic core and outward extends flange；And The edge of the supporter is folded upward to form cavity volume, and the flange of the magnetic core lower end is received, and described by the cavity volume The edge barrier of bending its move upwards.

According to above-mentioned in a first aspect, the lower end of the magnetic core is equipped with the recess portion being recessed inwardly from the side of magnetic core；And institute The edge for stating supporter is bent downward to form the cavity volume, and the magnetic core is received in the cavity volume, the supporter Edge is engaged with the magnetic core recess portion, and the magnetic core is fixed in the cavity volume.

According to above-mentioned in a first aspect, the pressure sensor is further included for the working spring of the vibrating diaphragm, the work Spring is arranged between the upper shell and the vibrating diaphragm.

According to above-mentioned in a first aspect, the upper shell further includes tubular end, the coil is wrapped in the tubular end Outside, the magnetic core can pass in and out the tubular end with the movement of the vibrating diaphragm.

According to above-mentioned in a first aspect, the pressure sensor further includes the adjusting bolt for adjusting the working spring, The adjusting bolt is arranged on the top of the upper shell.

According to above-mentioned in a first aspect, the upper shell is equipped with through-hole, for by the upper cavity volume and ambient air phase Even；And the lower housing is equipped with connector pipeline, for the lower cavity volume to be connected with liquid fluid to be measured.

According to above-mentioned in a first aspect, the vibrating diaphragm is integrally formed by elastic material.

According to above-mentioned in a first aspect, the pressure sensor further includes at least one printed circuit board；And lid, it is described Lid setting on the housing, forms accommodation space, for accommodating at least one print between the lid and the upper shell Printed circuit board.

According to it is above-mentioned in a first aspect, at least one printed circuit board each printed circuit board on have at least one A capacitance.

According to above-mentioned in a first aspect, the pressure sensor further includes ox head structure, the ox head structure is used for by described in Pressure sensor is detachably fixed to installation and ties.

According to the second aspect of the application, this application provides a kind of pressure sensor, including：Housing, the housing packet Upper shell and lower housing are included, the setting of the upper shell and lower housing to be formed between the upper shell and lower housing and hold Chamber；Vibrating diaphragm, the vibrating diaphragm are arranged between the upper shell and lower housing, and the cavity volume is separated into upper cavity volume and lower appearance Chamber, the vibrating diaphragm can be moved in response to the variation of pressure；Lid, it is described lid setting on the housing, it is described lid with it is described Accommodation space is formed between upper shell；Connector pipeline, the connector pipeline are in fluid communication with the lower cavity volume.Wherein, the pressure Force snesor has length and height, and the connector pipeline extends along the direction of the length of the pressure sensor.The lid There is extension in the side of connector pipeline extension, the extension has extending space, the extending space and the appearance Space connection of receiving connects.

According to above-mentioned second aspect, the pressure sensor further includes a printed circuit board, the printed circuit board edge The direction for the length of the pressure sensor is placed, and a part for the printed circuit board is mounted in the accommodation space, Another part is extended in the extending space.

According to above-mentioned second aspect, the pressure sensor further includes coil, and the coil is fixed to the upper shell On, the both ends of the coil are connected directly to the printed circuit board.

According to above-mentioned second aspect, at least a piece of chip is installed on the printed circuit board.

According to above-mentioned second aspect, the chip is working sensor chip.

According to above-mentioned second aspect, at least one capacitance is installed on the printed circuit board.

According to above-mentioned second aspect, the end of the extension is generally with the end part aligning of the connector pipeline or prolonging Stretch the end only slight beyond the connector pipeline.

According to above-mentioned second aspect, plug, the plug and the printed circuit board can be accommodated in the extending space On element electric appliance connection.

According to above-mentioned second aspect, plug is accommodated in the extending space；And a part for the printed circuit board is held It is contained in the accommodation space, the remainder for stating printed circuit board is contained in the extending space.

According to above-mentioned second aspect, the lower housing is equipped with lower snap fastener, the extension of the lid be equipped with it is described The upper snap fastener of lower snap fastener cooperation.

According to above-mentioned second aspect, there are two opposite planes for the extension tool of the lid, and described two planes are generally The direction of the height of the pressure sensor is parallel to, can be used in the positioning during pressure sensor installation.

According to above-mentioned second aspect, the pressure sensor further includes magnetic core, the magnetic core with the movement of the vibrating diaphragm and Movement；The vibrating diaphragm includes supporter and the thin skin around the supporter, and the thin skin extends from the edge of the supporter And go out；And the magnetic core is carried by the supporter.

According to above-mentioned second aspect, the outer profile of the supporter has supporter outer diameter, and the magnetic core has outside magnetic core Diameter, the supporter outer diameter are set equal to, are slightly larger than or are slightly less than the magnetic core outer diameter；Or the supporter outer diameter with The ratio between magnetic core outer diameter is between 0.85-1.6.

According to above-mentioned second aspect, the magnetic core is contacted with the supporter.

According to above-mentioned second aspect, the thin skin arches upward from the edge of the supporter initially towards the upper cavity volume, with Formation is arched upward portion.

According to above-mentioned second aspect, the vibrating diaphragm includes the sealing margin around thin skin setting, the sealing margin It is clamped between the upper shell and the lower housing, hermetically to separate the lower cavity volume and upper cavity volume；And institute It states the described of thin skin and arches upward portion across between the edge of the supporter and the sealing margin.

According to above-mentioned second aspect, the thin skin is in the junction with the edge of the supporter and the sealing margin Start to arch upward, with the portion that arches upward described in formation.

According to above-mentioned second aspect, the edge of the supporter has transition region, and the transition region is from the shape put down to arch Transition region on shape and/or from the transition region in thickness to thin thickness.

According to above-mentioned second aspect, the vibrating diaphragm is integrally formed.

According to above-mentioned second aspect, the lid is integrally formed.

Compared with prior art, a part for vibrating diaphragm is directly set as the branch of bearing magnetic core by the pressure sensor of the application Support body so as to reduce the overall dimensions of pressure sensor, meets the need of the gradual microminiaturization of product using pressure sensor It asks.

Moreover, compared with prior art, the arrangements of components of the sensor of the application is suitable for reducing the size of sensor, and And it improves to some extent to the convenience of the installation and removal of sensor.

Description of the drawings

Figure 1A is the dimensional structure diagram of one embodiment of the application pressure sensor；

Figure 1B is the sectional view of the short transverse of the pressure sensor in Figure 1A；

Fig. 2A is the sectional view of the short transverse of another embodiment of the application pressure sensor；

Fig. 2 B are the partial enlarged view of Fig. 2A；

Fig. 2 C are the sectional view of the short transverse of another embodiment of the application pressure sensor；

Fig. 2 D are the partial enlarged view of Fig. 2 C；

Fig. 2 E are the sectional view of the short transverse of another embodiment of the application pressure sensor；

Fig. 2 F are the partial enlarged view of Fig. 2 E；

Fig. 3 A and 3B show other two kinds of exemplary approach of supporter bearing magnetic core；

Fig. 4 A-4D show that the magnetic core in the pressure sensor of Figure 1B is installed to the process on vibrating diaphragm；

Fig. 5 A are the exploded view of the pressure sensor shown in Figure 1B；

Fig. 5 B are the dimensional structure diagram of adjusting bolt；

Fig. 5 C and Fig. 5 D show the housing of the pressure sensor shown in Fig. 5 A and the installation process of lid；

Fig. 6 A show installation diagram of first printed circuit board on the upper shell of pressure sensor in Fig. 5 A；

Fig. 6 B and Fig. 6 C respectively illustrate two examples of the first printed circuit board in Fig. 5 A；

Fig. 6 D and 6E respectively illustrate the circuit structure schematic diagram of the first printed circuit board shown in Fig. 6 B and Fig. 6 C；

Fig. 7 A are shown in embodiment of the tool there are two the pressure sensor of printed circuit board, two printed circuit boards Installation diagram；

Fig. 7 B are shown in the pressure sensor embodiment with additional plug-in unit capacitance, the installation diagram of plug-in unit capacitance；

Fig. 8 A are the side view of pressure sensor shown in figure 1A；

Fig. 8 B and 8C are respectively the front view and lateral plan of the ox head structure in Fig. 8 A；

The pressure sensor that Fig. 9 A and 9B are respectively illustrated in Figure 1A installs two kinds on household electrical appliance by ox head structure Different mounting means；

Figure 10 A and 10B respectively illustrate the solid at two visual angles of another embodiment of the application pressure sensor Figure；

Figure 11 shows the sectional view of the short transverse of the pressure sensor in Figure 10 A and 10B；

Figure 12 shows the exploded view of the pressure sensor in Figure 10 A and 10B；

Figure 13 shows the printed circuit board and its mounting structure in Figure 10 A and 10B；

Figure 14 A show the installation diagram of the pressure sensor and plug in Figure 10 A and 10B；

Figure 14 B are the phantom of Figure 13；

Figure 15 shows an implementation of mounting structure of the pressure sensor in household electrical appliance in Figure 10 A and 10B Example.

Specific embodiment

The various specific embodiments of the application are retouched below with reference to the attached drawing for forming this specification part It states.Although should be understood that the term for using represent direction in this application, such as "front", "rear", " on ", " under ", "left", "right" etc. describes the various example features and element of the application, but herein using these term sides of being intended merely to Just the purpose illustrated, it is determining based on the example orientations shown in attached drawing.Since embodiment disclosed in the present application can be by It is set according to different directions, so these represent that the term in direction is intended only as illustrating and should not be considered as limiting.Possible In the case of, identical or similar reference numeral used herein refers to same or like component.

Figure 1A is the dimensional structure diagram of one embodiment of the application pressure sensor.As shown in Figure 1A, pressure passes Sensor 100 includes housing 105 and covers the lid 101 on housing 105.The side wall of lid 101 is equipped with for by pressure sensor 100 are installed to the ox head structure 110 on household electrical appliance.Signal socket 120 is additionally provided on the side wall of lid 101, for pressure to be passed The control system for being signally attached to washing machine that sensor generates.The bottom of housing 105 is equipped with connector pipeline 102, for by housing The 105 inner volume fluid communication with wanted sensed level at least partly.The outer profile of housing 105 and lid 101 is cylinder Shape, naturally it is also possible to be other suitable shapes.

Figure 1B is the sectional view of the short transverse of the pressure sensor in Figure 1A, wherein the ox head knot being omitted in Figure 1A Structure 110.As shown in Figure 1B, the housing 105 of pressure sensor 100 includes the upper shell 201 to link together and lower housing 202, Cavity volume is formed between upper shell 201 and lower housing 202, vibrating diaphragm 210 is accommodated in cavity volume.Vibrating diaphragm 210 with sealing (or fluid-tight) will be upper Cavity volume between housing 201 and lower housing 202 is separated into cavity volume 215 and lower cavity volume 216.In response to pressure sensor 100 Air pressure change in lower cavity volume 216, vibrating diaphragm 210 can be deformed.

Upper cavity volume 215 is connected with atmospheric environment, so as to be atmospheric pressure in upper cavity volume 215.It is set on upper shell 201 thus There is through-hole 261 and 262, upper cavity volume 215 is connected with atmospheric environment.The junction block that lower cavity volume 216 passes through 202 bottom of lower housing Road 102 is connected to the cylinder of such as household electrical appliance, to measure the liquid level in cylinder (or water level).Pressure in lower cavity volume 216 takes Certainly in the height of measured liquid level (or water level).Therefore, in use with the variation of the height of liquid level (or water level), on Pressure differential in cavity volume 215 and lower cavity volume 216 is also with variation so that vibrating diaphragm 210 by upper cavity volume 215 and lower cavity volume 216 it Between the effect of change pressure differential that becomes, so as to which vibrating diaphragm 210 generates deformation with the variation of pressure differential.

Upper shell 201 is cup-shaped, including tubular end 240.Lower housing 202 is also cup-shaped, the bottom of lower housing 202 252 are equipped with the fluid channel 254 being in fluid communication with connector pipeline 102.The upper shell 201 of cup-shaped and the rim of a cup of lower housing 202 lead to Vibrating diaphragm 210 is crossed to be bonded together with sealing (or fluid-tight).

Pressure sensor 100 further includes magnetic core 218 and coil 251, and magnetic core 218 and coil 251 can form variable electricity Motion perception sensor.Magnetic core 218 is made of ferromagnetic material, is arranged in housing 105 and can be in response to the deformation of vibrating diaphragm 210 And it is moved relative to housing 105.Coil 251 is fixed on housing 105, and is coaxially disposed with magnetic core 218 so that when magnetic core 218 When being moved relative to housing 105, magnetic core 218 can pass in and out the space that coil 251 is limited.So as to be entered according to magnetic core 218 The amount in the space limited to coil 251, the inductance of coil 251 can change.According to the application example, coil 251 are wrapped in 240 outside of tubular end of upper shell 201.

Vibrating diaphragm 210 includes supporter 212 and the thin skin 213 set around supporter 212, and thin skin 213 is from supporter 212 Edge 460 extend (as shown in Figure 4 D).Vibrating diaphragm 210 further includes the sealing margin 230 set around thin skin 213, thin skin 213 across between the edge of supporter 212 460 and sealing margin 230.Sealing margin 230 is clamped in 201 He of upper shell Between lower housing 202, upper cavity volume 215 and lower cavity volume 216 to be separated with sealing (or fluid-tight).Supporter 212 and sealing strip Edge 230 clamps thin skin 213 from opposite side so that thin skin 213 arches upward upwards, to form the portion 470 (as shown in Figure 4 D) that arches upward.Root According to the example of the application, thin skin 213 starts to encircle in the junction at edge 460 and sealing margin 230 with supporter 212 It rises, with the portion 470 that arches upward described in formation.

Magnetic core 218 is carried by the supporter 212 of vibrating diaphragm 210.Magnetic core 218 can be contacted with supporter 212.With vibrating diaphragm 210 deformation, magnetic core 218 can generate movement so that and magnetic core 218 can pass in and out the tubular end 240 of upper shell 201, so as to Variable inductance inductor can be formed with being wrapped in the coil 251 of 240 outside of tubular end.212 bearing magnetic core of supporter 218 mode can there are many.Embodiment according to Figure 1B, vibrating diaphragm 210 include being arranged on the top of supporter 212 Mounting bar 214, mounting bar 214 vertically upwardly extends from the top of supporter 212.Magnetic core 218 is cylindrical shape and covers On mounting bar 214.The thickness of supporter 212 is provided so that the intensity of supporter 212 can support or carry magnetic Core 218.Magnetic core 218 can steadily be carried by supporter 212 as a result,.According to the application example, supporter 212 Thickness is 2-5 times of the thickness of thin skin 213.Compared with existing pressure sensor, the volume of magnetic core 218 is opposite in the application Small, so even if the thickness of supporter 212 is more relatively thin, supporter 212 also has enough intensity to support or bearing magnetic core 218.The other examples mode of 212 bearing magnetic core 218 of supporter will be described in detail with reference to attached drawing 3A and 3B below.This Shen Please directly with a part for vibrating diaphragm 210 come bearing magnetic core 218, without assembling additional load bearing component, therefore can be big The big size for reducing pressure sensor.

In this application, the shape that thin skin 213 arches upward upwards contributes to vibrating diaphragm 210 to generate deformation.Thin skin 213 is to arch The position setting risen so that the size of pressure sensor 100 reduces.In addition, the position of supporter 212 and construction are also beneficial to The size of sensor reduces.

Specifically, in the embodiment shown in Figure 1B, supporter 212 is discoid, and (D is in fig. 4d for D for outer diameter It shows).In this application, in order to reduce the size of supporter 212, the outer diameter D of supporter 212 is designed to be slightly larger than, be equal to or Person is slightly less than the outside diameter d (d is shown in fig. 4d) of magnetic core 218, as long as being capable of bearing magnetic core 218.So in magnetic core 218 Outside diameter d it is smaller in the case of, the outer diameter D of supporter 212 can be designed small as possible.

In addition, the portion 470 that arches upward of thin skin 213 is across between the edge of supporter 212 460 and sealing margin 230 's.The thickness of the main body of supporter 212 be designed as it is thicker than thin skin 213, be because supporter 212 to there is certain intensity to hold Magnetic core 218 is carried, and thin skin 213 will have certain flexibility.The edge 460 of supporter 212 can there are one transition regions 465 (see figure 4D), the transition region 465 can be transition region in shape from putting down arch or from the mistake in thickness to thin thickness It crosses area or the two haves both at the same time.But the transition region 465 is small as possible, as long as production technology and intensity can be met It is required that.Certainly, in ideal conditions and can there is no a transition region.

Smaller in 210 overall diameter of vibrating diaphragm as a result, the portion 470 that arches upward of thin skin 213, which still can be made, to be compared Greatly, to keep the sensitivity of reaction of the thin skin 213 to pressure change.Because the transition region 465 is smaller, volume is not needed to Outer support member supports magnetic core 218 and maintains the portion that arches upward of thin skin 213.In addition, in order to reduce size, and to arch upward Portion 470 can steadily keep the shape that it arches upward, and transition region 465 is without flat part.

According to the application example, the ratio between the outer diameter D of supporter 212 and the outside diameter d of magnetic core 218 are in 0.85 and 1.6 Between.As an example, the outside diameter d of magnetic core 218 can be between 3-5mm, and the width of the transition region 465 of supporter 212 It can be between 0-1mm.

Pressure sensor 100 is further included for the working spring 242 of vibrating diaphragm 210 and is set relatively with working spring 242 Elastic (or the lower support) component 217 of compensation put.Working spring 242 is sandwiched between upper shell 201 and vibrating diaphragm 210, and is compensated Elastomeric element 217 is sandwiched between lower housing 202 and vibrating diaphragm 210.Working spring 242 is accommodated in the tubular end of upper shell 201 In portion 240.According to the application example, the upper end of working spring 242 abuts the tune being inserted into from 240 top of tubular end Bolt 243 is saved, and the lower end of working spring 242 abuts magnetic core 218.The depth of tubular end 240 is screwed in by adjusting bolt 243 Degree can adjust the elasticity in original state of working spring 242.Compensation elastomeric element 217 is configured to through its bullet Power or support force offset the downward bullet that the gravity and working spring 242 of magnetic core 218, vibrating diaphragm 210 and other component are applied Spring force, so that even if when pressure change starts, vibrating diaphragm 210 can be also moved linearly by with the variation of pressure, and from And generate the frequency signal of linear change.But the pressure sensor of the application can not also have compensation elastomeric element 217, And in the case of without compensation elastomeric element 217, for existing pressure sensor, the pressure of the application passes Sensor also can relatively accurately sense the variation of pressure by the movement of vibrating diaphragm 210；This is because the magnetic core in the application 218th, vibrating diaphragm 210 and other component size are smaller, so the influence of gravity is also smaller than existing pressure sensor.

According to the application example, compensation elastomeric element 217 is the branch for being arranged on vibrating diaphragm 210 as shown in Figure 1B The bottom of support body 212 has flexible or elasticity flexible rod 217, and flexible rod 217 is extended downwardly from the bottom of supporter 212 And it is formed.The lower end of flexible rod 217 can be contacted with the bottom 252 of the lower housing 202 of cup-shaped；In this way, work as pressure sensor 100 is vertical when placing in use, have flexible or elasticity flexible rod 217 can generate to magnetic core 218, vibrating diaphragm 210 and other Gravity plays compensating action caused by component.Flexible rod 217 can be made into integration with supporter 212.In addition, flexible rod 217 It is aligned with the center of mounting bar 214.Compensation elastomeric element 217 can also be other types of component, this will combine Fig. 2 C-2F It is discussed in detail.

Magnetic core 218 can be supported on its initial position by flexible rod 217.In the initial position of magnetic core 218, upper cavity volume 215 It is generally equalized with the pressure in lower cavity volume 216.With the raising of liquid level, the air pressure in lower cavity volume 216 gradually increases, from And the gradual increase that upwards pressure that vibrating diaphragm 210 is subject to, the thin skin 213 of vibrating diaphragm 210 is caused to move upwards, and thereby drive magnetic Core 218 moves upwards.Moving upwards for magnetic core 218 can be compressed working spring 242.With the decline of liquid level, lower cavity volume Air pressure in 216 is gradually reduced, and working spring 242 is sprung back so that magnetic core 218 returns to its initial position.

Fig. 2A shows the sectional view of the short transverse of another embodiment of the application pressure sensor.Fig. 2 B are figure The partial enlarged view of the part A of 2A, to show the difference of the embodiment and the embodiment shown in Figure 1B.That is, There are different, other place all sames from the embodiment shown in Figure 1B only in the part shown in Fig. 2 B for the embodiment.

The difference lies in the bottoms of lower housing 202 for the embodiment shown in embodiment and Figure 1B shown in Fig. 2A and 2B 252 are equipped with protrude element 253.Fluid channel 254 of the protrude element 253 on the bottom 252 of lower housing 202 is set, and from Bottom 252 extends towards lower cavity volume 216.Protrude element 253 is hollow tubular structure, and can accommodate bullet at least partly Property stick 217.As shown in Figure 2 B, the lower end of flexible rod 217 is inserted into protrude element 253.Fluid channel 254 is set as cross Fluting, so as to be used to support the bottom end of flexible rod 217.The height of protrude element 253 is set as in flexible rod about 217 In the stroke of movement, flexible rod 217 is partly housed within always in protrude element 253, without from wherein deviating from, so as to Flexible rod 217 is moved according to desirable track.

The protrude element 253 of flexible rod 217 can be accommodated at least partly by setting, pressure sensor can be kept The consistency of 100 component assembling.This is because the position by limiting flexible rod 217, enables to each assembling pressure to pass During sensor 100, the initial makeup location of magnetic core 218 reaches consistent, and when the initial makeup location of magnetic core 218 is consistent so that Magnetic core 218 and the relative position of coil 251 are consistent, so that being generated by the oscillating circuit that magnetic core 218 influences initial Frequency is consistent, so as to make the adjusting of pressure sensor 100 more convenient.Further, since protrude element 253 can be limited Relative to the position of tubular end 240, therefore magnetic core 218 can be easily with the coil 251 being wrapped on tubular end 240 Alignment.And when vibrating diaphragm moves up and down, the axial movement path of magnetic core 218 will not deflection, so as to further improve pressure The measurement accuracy of sensor 100.

Fig. 2 C show the sectional view of the short transverse of another embodiment of the application pressure sensor.Fig. 2 D are figure The partial enlarged view of the part B of 2C, to show the difference of the embodiment and the embodiment shown in Figure 1B.That is, There are different, other place all sames from the embodiment shown in Figure 1B only in the part shown in Fig. 2 D for the embodiment.

As illustrated in figs. 2 c and 2d, in this embodiment, compensation elastomeric element is flexible rod 217 and the group of counterbalance spring 250 It closes.That is, a counterbalance spring 250 is additionally arranged on the basis of the flexible rod 217 shown in Figure 1B.Counterbalance spring 250 is sandwiched in branch Between support body 212 and the bottom 252 of lower housing 202.In the embodiment shown in Fig. 2 C and 2D, it is additionally provided with institute in Fig. 2A and 2B The protrude element 253 on the bottom 252 of lower housing 202 shown, counterbalance spring 250 are sleeved on the outside of protrude element 253. Can preferably the gravity of magnetic core 218, vibrating diaphragm 210 and other component be compensated by adding counterbalance spring 250, so as under When air pressure in cavity volume 216 starts variation, frequency signal exports linearly, and increases controllability simultaneously.

Fig. 2 E and 2F show the sectional view of the short transverse of another embodiment of the application pressure sensor 100.Figure 2F is the partial enlarged view of the C portion of Fig. 2 E, to show the difference of the embodiment and the embodiment shown in Figure 1B. That is the embodiment only in the part shown in Fig. 2 F from the embodiment shown in Figure 1B there are different, other places are homogeneous Together.

As illustrated in figures 2 e and 2f, in this embodiment, elastomeric element is compensated as counterbalance spring 250,250 quilt of counterbalance spring It is clipped between supporter 212 and the bottom 252 of lower housing 202.One end of counterbalance spring 250 is connected to the bottom of supporter 212 Portion, the other end are connected to the bottom 252 of lower housing 202.The center of counterbalance spring 250 is aligned with the center of mounting bar 214, is mended The effect for repaying spring 250 is identical with the effect of flexible rod in Figure 1B 217, and this will not be repeated here.

It should be noted that as shown in Figure 1B, Fig. 2A, Fig. 2 C and Fig. 2 E, in use, the pressure in these embodiments Sensor 100 is with perpendicular to or substantially perpendicular to the installation of the direction on ground.

Fig. 3 A and 3B show other two kinds of exemplary approach of 212 bearing magnetic core 218 of supporter.

In the exemplary approach shown in Fig. 3 A, magnetic core 218 is placed on the top of supporter 212, and by supporter 212 It is fixed.Specifically, the top of supporter 212 is equipped with cavity volume 325, magnetic core 218 is 44 at least partially received in the cavity volume In 325.Cavity volume 325 is folded upward at by the edge 320 of supporter 212 and is formed.The lower end of magnetic core 218 is equipped with from its lateral surface Prominent flange 321, flange 321 can be the circumferential flanges extended around the periphery of magnetic core 218.As shown in Figure 3A, edge 320 by twice bended, and the edge 320 so as to bend forms hook-type.It the lower end of magnetic core 218 can be by cavity volume together with flange 321 325 are received, and the edge 320 that flange 321 is inserted into bending is formed in hook-type, so as to pass through the edge of bending 320 blocking magnetic cores 218 move upwards.For the pressure of the exemplary approach using 212 bearing magnetic core of supporter shown in Fig. 3 A For sensor, compensation elastomeric element can not be used, in the case of using elastomeric element is compensated, figure may be used The counterbalance spring shown in Fig. 2 E and 2F may be used in flexible rod shown in 1B, can also use the flexible rod shown in Fig. 2 C and 2D The combined mode with counterbalance spring.

In the exemplary approach shown in Fig. 3 B, magnetic core 218 is positioned over 212 bottom of supporter, and is consolidated by supporter 212 It is fixed.Specifically, the bottom of supporter 212 is equipped with cavity volume 332, magnetic core 218 is 44 at least partially received in cavity volume 332.Hold Chamber 332 is bent downward by the edge 333 of supporter 212 and is formed, and be arranged to generally can be by magnetic core 218 for cavity volume 332 It is fully received within wherein.The lower end of magnetic core 218 is equipped with the recess portion 330 being recessed inwardly from the side of magnetic core 218, the end at edge 333 Portion is protruded towards cavity volume 332, for coordinating with recess portion 330, so as to which magnetic core 218 will be fixed in cavity volume 332.For using For the pressure sensor of the exemplary approach of 212 bearing magnetic core of supporter shown in Fig. 3 B, compensation elasticity can not be used In the case of using elastomeric element is compensated, the counterbalance spring shown in Fig. 2 E and 2F may be used in component.As previously mentioned, In the case of without compensation elastomeric element, for existing sensor, the pressure sensor of the application can also lead to The movement for crossing vibrating diaphragm 210 carrys out the more accurate variation for sensing pressure because magnetic core 218, vibrating diaphragm 210 in the application and other Part dimension is smaller, so the influence of gravity is also smaller than existing pressure sensor.

In the embodiment shown in Fig. 3 A and 3B, the outer profile of supporter 212 has outer diameter D, the outer diameter D of outer profile Slightly larger than the outside diameter d of iron core 218.The outer diameter D of the outer profile of supporter 212 sets smaller, as long as supporter 212 can be steady Surely bearing magnetic core 218.Thus, it is possible to increase as possible the thin slice 213 of vibrating diaphragm 210 in pressure sensor diametric(al) across Distance more so that thin skin 213 can more accurately the variation of response pressure and move, and thereby cause thin skin 213 Frequency signal caused by movement has better linear response.

Fig. 4 A-4D show that magnetic core 218 is installed on vibrating diaphragm 210 in the embodiment of the pressure sensor shown in Figure 1B One embodiment.Wherein, the three-dimensional structure diagram of magnetic core 218 that Fig. 4 A show vibrating diaphragm 210 and are also not mounted on vibrating diaphragm 210, Fig. 4 B show the sectional view for the original state that magnetic core 218 is installed on vibrating diaphragm 210, and Fig. 4 C and 4D show that magnetic core 218 is pacified It is attached to the stereogram and sectional view of the end-state on vibrating diaphragm 210.Fig. 4 A-4D, which are shown, a kind of easily to be installed magnetic core 218 Illustrative methods onto vibrating diaphragm 210.In order to which magnetic core 218 is conveniently mounted on vibrating diaphragm 210, in the installation of vibrating diaphragm 210 Stick 214 is equipped with removable extension 302.

Specifically, as shown in Figure 4 A, magnetic core 218 is also not installed on vibrating diaphragm 210.On the mounting bar 214 of vibrating diaphragm 210 Protruding portion 301 equipped with diameter overstriking, 301 top of protruding portion are additionally provided with one section of extension 302.Extension 302, protruding portion 301 It is made into integration with mounting bar 214 and vibrating diaphragm 210 by elastic material, elastic material is, for example, rubber material or flexible Plastic material.Extension 302 is only used for installation magnetic core 218, and after magnetic core 218 is installed in place, extension 302 will be removed, Such as it is cut off.301 top of protruding portion is equipped with inclined shoulder 305, and the diameter of shoulder 305 is gradually reduced upwards, until with prolonging Extending portion 302 is identical.The lower part of protruding portion 301 is generally cylindrical.When installing magnetic core 218, magnetic core 218 is sleeved on prolongs first In extending portion 302, magnetic core 218 is then made to be moved down along extension 302 and crosses protruding portion 301.Due to protruding portion 301 Diameter be more than protruding portion 301 below mounting bar 214 diameter, therefore magnetic core 218 stopped by protruding portion 301 and cannot be from peace Dress stick 214 is deviate from.

In initial mounting state as shown in Figure 4 B, magnetic core 218 is installed in place, but also not on mounting bar 214 Extension 302 is removed from mounting bar 214.

But in the final installation condition shown in Fig. 4 C and 4D, it can be seen that extension 302 is from mounting bar 214 It is upper to be removed.It should be noted that extension 302, protruding portion 301 and 214 structure of mounting bar as shown in Figure 4 A is suitable for this Pressure sensor 100 in application, because the magnetic core 218 of sensor 100 is to directly support or be carried on supporter in the application On 212.

Compared with pressure sensor of the prior art, the pressure sensor of the application is directly by a part for vibrating diaphragm 210 The supporter of bearing magnetic core is set as, so as to reduce the overall dimensions of pressure sensor, meets the production using pressure sensor The demand of the gradual microminiaturization of product.In addition, the shell of supporter on the vibrating diaphragm of the pressure sensor of the application in pressure sensor Diametric(al) on size be also provided with smaller, also can further reduce the overall dimensions of pressure sensor in this way.In pressure In sensor, the diameter D of the outer profile of lower housing 202_L(D_LShown in Fig. 2 E) it is typically larger than upper shell 201 and lid 101 The diameter on top, therefore the diameter of the outer profile of lower housing 202 determines the size of the outer diameter dimension of pressure sensor.With The size of existing pressure sensor is compared, the diameter D of the lower housing 202 of the pressure sensor of the application_LSize can subtract The 50-60% of the diameter of the small lower housing to existing pressure sensor.In addition, the ruler with existing pressure sensor Very little to compare, the pressure sensor of the application can be reduced to existing pressure sensor short transverse in the size of short transverse The 40-50% of size.Therefore the pressure sensor overall dimensions of the application are significantly less than the whole ruler of existing pressure sensor It is very little.

Fig. 5 A show the exploded view of the pressure sensor shown in Figure 1B.As having been combined in front Figure 1B introduced, The upper shell 201 and lower housing 202 of pressure sensor 100 are bonded together to form housing 105 after, lid 101 is covered in housing 105 On.Vibrating diaphragm 210 is clipped between upper shell 201 and lower housing 202, and magnetic core 218 is carried by the supporter 212 of vibrating diaphragm 210, coil 251 are wrapped in outside the tubular end 240 of upper shell 201.Working spring 242 is contained in the tubular end 240 of upper shell 201 Inside, adjusting bolt 243 are used to adjust the elasticity in original state of working spring 242.

Other than component mentioned above, as shown in Figure 5A, pressure sensor 100 is further included to be carried by upper shell 201 The first printed circuit board 410, the first printed circuit board 410 is accommodated in the cavity volume 106 that lid 101 and housing 105 are formed. The tubular end 240 of upper shell 201 is equipped with mounting base 420, and the first printed circuit board 410 is mounted in mounting base 420.The One printed circuit board 410 is equipped with capacitance 630.Mounting base 420 is set around tubular end 240, the top of tubular end 240 It is sealed together by bolt 243 and bolt fixing glue 402.

Fig. 5 B are the dimensional structure diagram of adjusting bolt.As shown in Figure 5 B, the top of adjusting bolt 243 is equipped with and is suitable for Recess portion 401 with adjusting tool cooperation, the shape of recess portion can be triangle or other shapes.Use the tool of adjusting The depth that adjusting bolt 243 enters the tubular end 240 of upper shell 201 can be changed, so as to adjust working spring 242 In the elasticity of original state.

Fig. 5 C and Fig. 5 D show the installation process of housing 105 and lid 101.When the upper shell 201 and lower housing in Fig. 5 A 202 are bonded together forms 105 axis of housing later, and the first printed circuit board 410 is to be located at 105 outside of housing.In order to incite somebody to action First printed circuit board 410 seals, and needs to cover lid 101 on housing 105.Signal socket 120 on lid 101 can be by One printed circuit board 410 is connected with the control system of household electrical appliance.Signal socket 120 not only have from the lateral wall of lid 101 to The part 521 of outer extension, and have from the part 523 (also reference can be made to Figure 1B) that the madial wall of lid 101 extends internally.

Due to the small volume of pressure sensor 100,101 inner space of lid is also very narrow, therefore when housing 105 and lid When 101 assemblings are completed, the connecting pin 412 of the first printed circuit board 410 that housing 105 is carried and signal socket 120 are from lid The part 523 that 101 madial wall extends internally is overlapped (such as Figure 1B at least partly on the axial direction of pressure sensor 100 It is shown).Therefore, when lid 101 is assembled on housing 105, it is impossible to directly by the first printed circuit board 410 on housing 105 Connecting pin 412 be aligned with the signal socket 120 of lid 101 after lid 101 is covered on housing 105.For this purpose, in assembling the application Pressure sensor 100 lid 101 and housing 105 when, need first so that on signal socket 120 and housing 105 on lid 101 The position of connecting pin 412 of the first printed circuit board 410 mutually stagger (such as by the first printed circuit board on housing 105 410 connecting pin 412 rotates by a certain angle counterclockwise relative to the signal socket on lid 101), housing 105 is then inserted into lid In 101, after being inserted into appropriate location, housing 105 is rotated into (such as rotating clockwise) relative to lid 101, until lid 101 Lower end and housing 105 upper end set by buckle structure be mutually clamped together, the signal in rigid cap 101 is inserted at this time Mouth 120 is be overlapped at least partly with 412 position of connecting pin of the first printed circuit board 410 on housing 105.105 He of housing State after the completion of the assembling of lid 101 is as shown in Figure 5 D.

Fig. 6 A show dress of first printed circuit board 410 on the upper shell 201 of pressure sensor 100 in Fig. 5 A Figure.As shown in Figure 6A, the first printed circuit board 410 is mounted on the mounting base on the tubular end 240 of upper shell 201 On 420.Mounting base 420 is wound around above the coil 251 on tubular end 240.The printing electricity of mounting base 420 and first Road plate 410 does not cover the top of tubular end 240.First printed circuit board 410 is equipped with the first pin 611 and the second pin 612 and corresponding both sides be equipped with the first ear 621 and the second ear 622.First pin 611 and the second pin 612 It is inserted into mounting base 420.Two ends 605 and 606 of coil 251 are respectively wound around the first ear 621 and the second ear On 622, and with the circuit communication on the first printed circuit board 410.

Fig. 6 B and Fig. 6 C respectively illustrate two examples of the first printed circuit board of the pressure sensor 100 in Fig. 5 A. Fig. 6 D and 6E respectively illustrate the circuit structure schematic diagram of the first printed circuit board shown in Fig. 6 B and Fig. 6 C.

In two examples shown in 6B and Fig. 6 C, with the capacitance that quantity is different on the first printed circuit board, to meet Different demands.Wherein, capacitance 630 there are one being set on the first printed circuit board 410 shown in Fig. 6 B, forms with coil 251 Parallel circuit.And the first printed circuit board 410 shown in Fig. 6 C is equipped with 2 capacitances 631 and 632, the two capacitances connect it It is in parallel with coil 251 again afterwards.The capacitance is, for example, resonant selecting frequency capacitance.

Fig. 6 D show the circuit structure schematic diagram 640 of the first printed circuit board in Fig. 6 B.As shown in Fig. 6 D.Pressure Coil 251 inside sensor 100 is equivalent to the inductance L 251 in figure.The difference of water level leads to the magnetic core position inside coil 251 It puts and changes, also change therewith so as to the inductance value of inductance L 251.Inductance L 251 and capacitance C 630 form choosing in parallel Frequency network, the choosing in parallel that integrated circuit U1 641, U2 642 are formed as positive feedback amplifier with inductance L 251 and capacitance C 630 Frequency network is in parallel, and integrated circuit U3 643 is used for waveform shaping, and to export square-wave signal, the frequency of circuit output is

Fig. 6 E show the circuit structure schematic diagram of the first printed circuit board in Fig. 6 C.As illustrated in fig. 6e, pressure sensing Coil 251 inside device 100 is equivalent to the inductance L 251 in figure.Inductance L 251 and capacitance C1 631, C2 632 form standard Colpitts oscillation circuit, integrated circuit U1 651 are to make as sign-changing amplifier is in parallel with Colpitts oscillation circuit With integrated circuit U2 652 is used for waveform shaping, and to export square-wave signal, the frequency of circuit output is：

As an example, multiple integrated circuits can be set on the household electrical appliance for using the application pressure sensor The components such as U1, U2, U3 form the circuit structure in such as Fig. 6 D, Fig. 6 E, but can also be set on pressure sensor multiple integrated Circuit U 1, U2, U3 form the circuit structure in Fig. 6 D, Fig. 6 E such as and directly export sensing signal, and can also be by all capacitances 630th, 631,632 and other electric elements be arranged in the household electrical appliance using the application pressure sensor.

Fig. 7 A show tool there are two printed circuit board pressure sensor 100 embodiment in, two printed circuit boards The installation diagram on upper shell 201 in fig. 5.For the pressure sensor shown in Fig. 5 A, two can be set wherein A printed circuit board, one of printed circuit board is set along the diametric(al) of pressure sensor, and another printed circuit Plate is set along the short transverse of pressure sensor.As shown in Figure 7 A, two printed circuit boards are respectively the first printed circuit board 410 and second printed circuit board 710.First printed circuit board 410 and its mounting means and the installation side of Fig. 6 A illustrated embodiments Formula is identical.But unlike Fig. 6 A illustrated embodiments, in the embodiment shown in Fig. 7 A, the first printed circuit board 410 The first pin 611 and the second pin 612 set longer, be inserted into installation in the first pin 611 and the second pin 612 in this way After in seat 420, the end of the first pin 611 and the second pin 612 can be stretched out from mounting base 420.Second printed circuit Plate 710 is mounted on the first printed circuit board 410.As shown in Fig. 7 A, the second printed circuit board 710 is equipped with mounting hole 720, For the second printed circuit board 710 is plugged on the first pin 611 of the first printed circuit board 410 and the second pin 612 from On the end that mounting base 420 is stretched out so that the second printed circuit board 710 is essentially perpendicular to the first printed circuit board 410. This mounting means of second printed circuit board 710 takes full advantage of the inner space of lid 101 so that pressure sensor 100 Volume can reduce as much as possible.In addition, in the case where not needing to the second printed circuit board 710, the second printed circuit board 710 can easily disassemble from the first printed circuit board 410.Second printed circuit board 710 is equipped at least one IC Circuit and external chip 703, the circuit on chip 703 can realize the diagnostic circuit function of extension.

Fig. 7 B are shown in the pressure sensor embodiment with plug-in unit capacitance, the upper shell of plug-in unit capacitance in fig. 5 Installation diagram on 201.As shown in Figure 7 B, the present embodiment pressure sensor can be set there are one (such as Fig. 6 D of outer plugin capacitance 720 Shown capacitance 630), there are two pins for the tool of outer plugin capacitance 720, are inserted into the first pin of the first printed circuit board 410 respectively 611 and second pin 612 from the end that mounting base 420 is stretched out.Plug-in unit capacitance 720 is also to be vertically set on mounting base as a result, 420 side, so as to take full advantage of the inner space of lid 101.Plug-in unit capacitance 720 is, for example, bulbous plug capacitance.

If without using outer plugin capacitance, as an embodiment, an electricity can be installed on the first printed circuit board 410 Hold (capacitance 630 as shown in Fig. 6 B and 6D)；As another embodiment, two electricity can be installed on the first printed circuit board 410 Hold (capacitance 631 and 632 as shown in Fig. 6 C and 6E).

Fig. 8 A are the side view of pressure sensor 100 shown in figure 1A.As shown in Figure 8 A, pressure sensor 100 includes Ox head structure 110, for pressure sensor 100 to be detachably fixed to household electrical appliance.Ox head structure 110 is arranged on lid On 101 side wall.

Fig. 8 B and 8C are respectively the front view and lateral plan of the ox head structure 110 in Fig. 8 A.Such as Fig. 8 B and 8C institutes Show, ox head structure 110 is equipped with main body 801, the head 823 upwardly extended from the top of main body 801 and from the top of main body 801 Portion upwardly extends and is located at the elastic arm 802,804 of 823 both sides of head.Elastic arm 802,804 is symmetrically set relative to head 823 It puts.Elastic arm 802,804 can be relative to 801 flexible deformation of main body.Elastic arm 802,804 is in the outside point far from head 823 The shoulder 821,822 that She You do not protrude." ox head " shape structure is collectively formed in head 823, elastic arm 802,804 and main body 801. The top on head 823 is less than the top of the elastic arm 802,804 of both sides.The back side on head 823 is equipped with linking arm 815, for inciting somebody to action Ox head structure 110 links together with lid 101.Linking arm 815 can also extend downwardly into the back of the body of main body 801 from head 823 Face.As shown in Figure 5A, the top of linking arm 815 is equipped with groove 818.

As shown in Figure 8 C, the front of elastic arm 802,804 is respectively equipped with elastic bumps 806,808.Elastic bumps 806, 808 have inclined lower face 809,811, and can have the upper surface 810,812 of plane.

The pressure sensor that Fig. 9 A and 9B are respectively illustrated in Figure 1A is installed to by ox head structure 110 on household electrical appliance Two different mounting means.

As shown in Figure 9 A, pressure sensor 100 is mounted on home electronic panel 900, is set on home electronic panel 900 There is mounting structure 910, the elastic arm 802,804 of ox head structure 110 can be matched with mounting structure 910 by pressure sensor 100 are fixed on home electronic panel 900.Mounting structure 910 include being arranged on packed slot 903 on panel 900 and A pair of of stop arm 901,902 above slot 903.

When pressure sensor 100 is installed to panel 900, the main body 801 of ox head structure 110 is first inserted into slot 903 In, when 801 lower end of main body is inserted to 903 bottom of slot, elastic bumps 806 on the elastic arm 802,804 of ox head structure 110, 808 upper surface 808,810 can just abut the bottom surface of the stop arm 901,902 of mounting structure 910.Thus ox head structure 110 are fixed in mounting structure 910.If pressure sensor 100 disassembled from panel 900, needing will be elastic Arm 802,804 is moved to the direction far from panel, so that the upper surface 808,810 of elastic bumps 806,808 is detached from installation knot Then the stop arm 901,902 of structure 910 again extracts ox head structure 110 from slot 903 upwards.

As shown in Figure 9 B, home electronic panel 900 is equipped with mounting structure 920, and the head 823 of ox head structure 110 can It is matched with mounting structure 920 and pressure sensor 100 is fixed on home electronic panel 900.Mounting structure 920 includes bag Plug slot 913.Mounting structure 920 further includes the stopper projection 918 above slot 913, stopper projection 918 be arranged on from In the stop arm 916 that panel 900 extends.

When pressure sensor 100 is installed to panel 900, the main body 801 of ox head structure 110 is first inserted into slot 913 In, when 801 lower end of main body is inserted to 913 bottom of slot, the top on the head 823 of ox head structure 110 can just abut installation The bottom surface of the stopper projection 918 of structure 920.Thus ox head structure 110 is fixed in mounting structure 920.If by pressure Sensor 100 is disassembled from panel 900, is needed stop arm 916 to the direction on the head 823 far from ox head structure 110 It is mobile, so that the top on head 823 is detached from the bottom surface of the stopper projection 918 of mounting structure 920, then again by ox head structure 110 It is extracted from slot 903 upwards.

Fig. 9 A and Fig. 9 B respectively illustrate installation panel 900 it is parallel with the short transverse of pressure sensor 100 with it is vertical The mounting means of two kinds of situation lower pressure sensors 100.Due to being provided with ox head structure 110, the pressure sensor of the application 100 can be applicable in the different installation requirements of household electrical appliance, and the installation and removal of pressure sensor are also more convenient.

In the embodiment of aforementioned pressure sensor, for by the fluid communication of pressure sensor 100 and liquid level to be measured Connector pipeline 102 be to extend substantially along the short transverse of pressure sensor.And in some applications, household electrical appliance Installation space have larger limitation to the short transverse of pressure sensor, it is but (or straight to the length direction of pressure sensor Diameter direction) limitation it is more tolerant；That is, in some applications it may be desirable to pressure sensor is in flat pattern.This application An example be exactly increasingly be intended to miniaturization rotary drum washing machine.For this purpose, according to another embodiment, the application also carries A kind of pressure sensor 1100 (as shown in Figure 10 A, 10B, 11 and 12) is supplied, in this embodiment, connector pipeline 102 is big Along the extension of the direction of the length L of pressure sensor 1100 on body, so as to reduce in 1100 short transverse of pressure sensor Size.

It should be noted that from Figure 10 A, 10B, 11 and 12 as can be seen that the operation principle and 1A of pressure sensor 1100 As the pressure sensor 100 shown in 1B, the installation site of machine work component and mutual cooperation in pressure sensor 1100 As pressure sensor 100；In pressure sensor 1100 electronic working component connection and cooperate with Fig. 6 D shown in As oscillating circuit 640.So the part in pressure sensor 1100 as pressure sensor 100, the application is no longer Repeated description.From Figure 10 A, 10B, 11 and 12 as can be seen that the main distinction of pressure sensor 1100 and pressure sensor 100 It is the setting of the design and printed circuit board covered.

Specifically, Figure 10 A and 10B respectively illustrate two visual angles of the embodiment of above-mentioned pressure sensor 1100 Stereogram, wherein Figure 10 A are the stereograms looked over from the top of pressure sensor 1100, and Figure 1B is from pressure sensor The stereogram that 1100 bottom looks over.As illustrated in figs. 10 a and 10b, pressure sensor 1100 includes housing 1105 and is mounted on Lid 1101 on housing.The lower part of housing 1105 is equipped with connector pipeline 102.Connector pipeline 102 is substantially along pressure sensor Length L (as Figure 11 is indicated) direction extension.

Figure 11 shows the sectional view in the direction of the height H of the pressure sensor in Figure 10 A and 10B；Figure 12 shows figure The exploded view of pressure sensor in 10A and 10B.It is similar with the pressure sensor 100 in Figure 1B, as shown in FIG. 11 and 12, pressure The housing 1105 of force snesor 1100 includes upper shell 201 and lower housing 1202, and upper shell 201 is mutually interconnected with lower housing 1202 It connects to form cavity volume.Vibrating diaphragm 210 is arranged between upper shell 201 and lower housing 1202, and the cavity volume is separated into upper cavity volume 215 and lower cavity volume 216.Connector pipeline 102 is in fluid communication with lower cavity volume 216.Be arranged on the lid 1101 of the top of upper shell 201 with Accommodation space 106 is formed between upper shell 201.The upper shell 201 of pressure sensor 1100 and the construction of lower housing 1202 shake The setting of construction, magnetic core 218, coil 251 and the working spring 242 of film 210 etc. and phase in the pressure sensor 100 in Figure 1B The component answered is roughly the same, and this will not be repeated here.Therefore, pressure sensor 1100 is as pressure sensor 100, it may have compared with Small size.Unlike the pressure sensor 100 in Figure 1B, the generally edge of connector pipeline 102 of pressure sensor 1100 The direction extension of the length L of pressure sensor.

In addition, the lid 1101 of pressure sensor 1100 has extension 1108 in the side that connector pipeline 102 extends, Extension 1108 has extending space 1109, the accommodation space formed between extending space 1109 and lid 1101 and upper shell 201 106 connections connect.Extension 1108 is integrally formed with lid 1101.On the direction of the length L of pressure sensor 1101, lid The end 1107 of 1101 extension 1108 is aligned with the end 1103 of connector pipeline 102 or extends only slight beyond junction block The end 1103 in road 102, as long as not influencing the installation of the length direction of pressure sensor 1100.

The lower housing 1202 of pressure sensor 1100 is equipped with lower snap fastener 1282, the extension of lid 1101 be equipped with The upper snap fastener (not shown) that lower snap fastener 1282 coordinates.The upper snap fastener phase of lower snap fastener 1282 and lid 1101 The extension 1108 of lid 1101 can be connected by cooperation with lower housing 1202.

Pressure sensor 1100 further includes a printed circuit board 1410, and printed circuit board 1410 is along pressure sensor The direction of 1100 length L is placed, and a part for printed circuit board 1410 is mounted in the accommodation space 106, another It extends partially into the extending space 1109.It is similar with the printed circuit board 410 in Figure 1B, pressure sensor 1100 Printed circuit board 1410 is also mounted in the mounting base 420 on the tubular end 240 of upper shell 201.Mounting base 420 Above the coil 251 being wrapped on tubular end 240.

With 410 phase of printed circuit board in the accommodation space 106 being only located between lid 101 and housing 105 in Figure 1B Than 1410 length of printed circuit board in the present embodiment increases, the accommodation space 106 between lid 1101 and upper shell 201 It extends in the extending space 1109 that the extension 1108 of lid 1101 is formed, therefore, the printed circuit in the present embodiment Area of the plate 1401 with bigger carrys out receiving element.And although printed circuit board 1410 is lengthened out and lid 1101 is equipped with extension Portion 1108, but the installation of this length direction that can't increase pressure sensor 1101.Printed circuit board 1410 is lengthened out and covers 1101 take full advantage of the space of 102 top of connector pipeline to extend the face of printed circuit board 1410 equipped with extension 1108 Product.When there is printed circuit board 1410 sufficient area to carry out receiving element, pressure sensor can no longer need to pass through increase The printed circuit board (such as printed circuit board 710 shown in Fig. 7 A) that one piece of direction along pressure sensor height H is set holds Receive additional element.The printed circuit board 1410 set using the direction of the length L along pressure sensor is more convenient for coil 251 With the connection of printed circuit board 1410 because the both ends of coil 251 can be set with the direction of the length L along pressure sensor Printed circuit board 1410 be connected directly, without being connected by lead；Such structure reduces cost, easy to produce.Figure 13 show the connection mode of the printed circuit board 1410 and coil 251 in Figure 10 A and 10B.

As shown in figure 13, two ends 605 and 606 of coil 251 be respectively wound around printed circuit board 1410 from installation On the first pin 611 and the second pin 612 stretched out in seat 420.Chip 1703 is installed on printed circuit board 1410.Chip 1703 be, for example, working sensor chip.Capacitance 630 is also equipped on printed circuit board 1410.It is worth noting that, in addition to institute Show other than the chip 1703 at place and capacitance 630, be also equipped on printed circuit board 1410 other chips, capacitance or its Its electric elements.In addition, lower housing 1202 is additionally provided with supporting rod 1285 near lower snap fastener 1282, for Auxiliary support Printed circuit board 1410.

The advantages of setting printed circuit board 1410 in this way is：Be conducive to reduce the short transverse of pressure sensor 1100 On size；The installation strength of printed circuit board 1410 can be improved；Holding for 1410 electric elements of printed circuit board can be expanded Carrying capacity, to meet the more and more intelligentized requirement of household electrical appliance.

Referring still to Figure 10 A and 10B, opposite plane 1112 and 1114 that there are two the tools of extension 1108 of lid 1101, this Two planes 1112 and 1114 are substantially parallel to the direction of the height H of pressure sensor 1100, can be used in pressure sensor Positioning during 1100 installation.Plane 1112 and 1114 also forms the socket 120 of plug 480 (as shown in figs. 14 a-b).It inserts First 480 connect with the element electric appliance on printed circuit board 1410, for being filled in the control of pressure sensor 1100 and household electrical appliance Signal is transmitted between putting.It is worth noting that, the plane 1112 and 1114 that the application is provided with as shown in 10A and 10B is used for Positioning when pressure sensor 1100 is installed, can also be in pressure sensor although this mechanical structure arrangement works well Other positions, such as along cylindrical housings extend plane for install when positioning, also in the protection domain of the application Within.

Figure 14 A show the installation diagram of the pressure sensor and plug in Figure 10 A and 10B；Figure 14 B are the part of Figure 13 Section View, that removes a part for the extension 1108 of lid 1101, to show that plug 480 is with printed circuit board 1410 How to assemble.As shown in figs. 14 a-b, plug 480 is inserted into the extension sky of the extension 1108 of lid 1101 from socket 120 Between in 1109, plug 480 is equipped with receiving slit 482, for the connecting pin 1412 of printed circuit board 1410 to be received wherein. The printed circuit board 1410 set using the direction of the length L along pressure sensor is more convenient for plug 480 and printed circuit board 1410 connection.Further, since extension 1108 is integrally formed with lid 1101, plug 480 is accommodated in the extension of lid 1101 Preferably plug liquid can be isolated in 1108, to enhance the waterproof action to plug 480.Plug 480 is meets The plug of RAST2.5 3P interfaces.

Figure 15 shows an implementation of mounting structure of the pressure sensor in household electrical appliance in Figure 10 A and 10B Example.As shown in figure 15, the panel 900 of household electrical appliance is equipped at least two elasticity extended from the surface of installing plate 900 Arm 1552 and 1554, the free end of elastic arm 1552 and 1554 are respectively equipped with hook portion 1551 and 1553.Pressure sensor 1100 is pacified Between two elastic arms 1552 and 1554, and pass through hook portion 1551 and 1553 and be fixed on panel 900.1551 He of hook portion 1553 distance apart from the surface of panel 900 is set as when the top of the lid 1101 of pressure sensor 1100 is against panel 900 During surface, hook portion 1551 and 1553 can just hook the bottom of the lower housing 1202 of pressure sensor 1100.On panel 900 The anti-rotation plate 1558 and 1559 extended from the surface of panel 900 is additionally provided with, anti-rotation plate 1558 and 1559 can be with lid Two planes 1112 and 1114 of 1101 extension 1108 match, and prevent pressure sensor 1100 from being revolved relative to panel 900 Turn.In addition, being additionally provided with the barrier plate 1556 extended from the surface of panel 900 on panel 900, blocking version 1556 is used to hinder Gear pressure sensor 1100 is moved along the surface of panel 900.It is worth noting that, Figure 15 illustrate only pressure sensor A kind of example of 1100 mounting means, pressure sensor 1100 can be installed by various modes, for example, can be such as Figure 15 As shown, specific mounting structure on the panel of household electrical appliance is set, is only set therewith on pressure sensor 1100 Matched structure can also set mounting structure on pressure sensor 1100, then be got home by mounting structure installation On the panel of electrical appliance.

It should be noted that in this application, vibrating diaphragm 210 is integrally formed, and lid 101,1101 is also integrally formed. It should be noted that although the size of pressure sensor 100 and 1100 has and is obviously reduced in the application, by surveying repeatedly It tries, pressure sensor 100 and 1100 has the pressure sensitivity for complying fully with service requirement in the application.

Although the application will be described in the specific embodiment shown in refer to the attached drawing, but it is to be understood that not Under the background of the spirit and scope of the application introduction, the pressure sensor of the application can be there are many version.This Shen Component in each embodiment and/or structure please can carry out various combinations in the conceived case, this is all the application's Within protection domain.It is disclosed in the present application real to change that those of ordinary skill in the art will additionally appreciate different modes The parameter in example is applied, is each fallen in the spirit and scope of claims hereof.

Claims

1. a kind of pressure sensor (100,1100), including：

Housing (105,1105), the housing (105,1105) include upper shell (201) and lower housing (202,1202), it is described on The setting of housing (201) and lower housing (202,1202) causes between the upper shell (201) and lower housing (202,1202) Form a cavity volume；

Vibrating diaphragm (210), the vibrating diaphragm (210) are arranged between the upper shell (201) and lower housing (202,1202), and by institute It states cavity volume and is separated into cavity volume (215) and lower cavity volume (216)；

Magnetic core (218), the magnetic core (218) move with the movement of the vibrating diaphragm (210)；

It is characterized in that：

Thin skin (213) of the vibrating diaphragm (210) including supporter (212) and around the supporter (212), the thin skin (213) extend from the edge of the supporter (212) (460)；And

The magnetic core (218) is carried by the supporter (212).

2. pressure sensor (100,1100) as described in claim 1, it is characterised in that further include：

Coil (21), the coil (21) are fixed on the housing (105,1105), the coil (21) and the magnetic core (218) cooperating, to form variable inductance inductor.

3. pressure sensor (100,1100) as described in claim 1, it is characterised in that：

The outer profile of the supporter (212) has supporter outer diameter, and the magnetic core (218) has magnetic core outer diameter, the support External diameter is set equal to, is slightly larger than or is slightly less than the magnetic core outer diameter；Or

The ratio between the supporter outer diameter and magnetic core outer diameter are between 0.85-1.6.

4. pressure sensor (100,1100) as described in claim 1, it is characterised in that：

The magnetic core (218) contacts with the supporter (212).

5. pressure sensor (100,1100) as described in claim 1, it is characterised in that：

Sealing margin (230) of the vibrating diaphragm (210) including surrounding the thin skin (213) setting, sealing margin (230) quilt Be clamped between the upper shell (201) and the lower housing (202,1202), so as to hermetically by the lower cavity volume (216) with Upper cavity volume (215) separates；And

The thin skin (213) includes the portion of arching upward (470), and the portion that arches upward (470) is across at the edge of the supporter (212) (460) between the sealing margin (1230).

6. pressure sensor (100,1100) as claimed in claim 5, it is characterised in that：

The thin skin (213) is opened in the junction at edge (460) and the sealing margin (230) with the supporter (212) Beginning arches upward, with the portion that arches upward described in formation (470).

7. pressure sensor (100,1100) as described in claim 1, it is characterised in that further include：

For the compensation elastomeric element (217,250) of the vibrating diaphragm (210), the compensation elastomeric element (217,250) is sandwiched in Between the lower housing (202,1202) and the vibrating diaphragm (210).

8. pressure sensor (100,1100) as claimed in claim 7, it is characterised in that：

The compensation elastomeric element (217,250) is the flexible rod of supporter (212) lower part for being arranged on the vibrating diaphragm (210) (217), the flexible rod (217) extends downwardly from the supporter (212) and can be with the bottom of the lower housing (202) (252) it contacts.

9. pressure sensor (100,1100) as described in claim 1, it is characterised in that：

The magnetic core (218) is cylindrical shape；

The vibrating diaphragm (210) further includes the mounting bar (214) extended from the upper surface of the supporter (212)；And

The magnetic core (218) is sleeved on the mounting bar (214).

10. pressure sensor (100,1100) as claimed in claim 5, it is characterised in that：

The vibrating diaphragm (210) is integrally formed by elastic material.

11. a kind of pressure sensor (1100), including：

Housing (1105), the housing (1105) include upper shell (201) and lower housing (1202), the upper shell (201) and The setting of lower housing (1202) to form cavity volume between the upper shell (201) and lower housing (1202)；

Vibrating diaphragm (210), the vibrating diaphragm (210) are arranged between the upper shell (201) and lower housing (1202), and by the appearance Chamber is separated into cavity volume (215) and lower cavity volume (216), and the vibrating diaphragm (210) can move in response to the variation of pressure；

It covers (1101), the lid (1101) is arranged on the housing (1105), the lid (1101) and the upper shell (201) Between formed accommodation space (106)；

Connector pipeline (102), the connector pipeline (102) are in fluid communication with the lower cavity volume (216)；

Wherein, the pressure sensor (1100) has length (L) and height (H), and the connector pipeline (102) is along the pressure The direction extension of the length (L) of force snesor (1100)；And

Wherein, the lid (1101) has extension (1108), the extension in the side that connector pipeline (102) extends (1108) there is extending space (1109), the extending space (1109) connects with the accommodation space (106) connection.

12. pressure sensor (1100) as claimed in claim 11, it is characterised in that further include：

One printed circuit board (1410), the printed circuit board (1410) along the pressure sensor (1100) length (L) direction is placed, and a part for the printed circuit board (1410) is mounted in the accommodation space (106), another part It extends in the extending space (1109).

13. pressure sensor (1100) as claimed in claim 12, it is characterised in that further include：

Coil (251), the coil are fixed on the upper shell (201), and the both ends of the coil (251) are connected directly to The printed circuit board (1410).

14. pressure sensor (1100) as claimed in claim 12, it is characterised in that：

At least a piece of chip (703) is installed on the printed circuit board (1410).

15. pressure sensor (1100) as claimed in claim 12, it is characterised in that：

At least one capacitance (630) is installed on the printed circuit board (1410).

16. pressure sensor (1100) as claimed in claim 11, it is characterised in that：

The end (1107) of the extension (1108) is generally aligned or prolongs with the end (1103) of the connector pipeline (102) Stretch the end (1103) only slight beyond the connector pipeline (102).

17. pressure sensor (1100) as claimed in claim 12, it is characterised in that：

Plug (480), the plug (480) and the printed circuit board (1410) can be accommodated in the extending space (1109) On element electric appliance connection.

18. pressure sensor (1100) as claimed in claim 11, it is characterised in that：

The lower housing (1202) be equipped with lower snap fastener (1282), it is described lid (1101) extension (1108) equipped with institute State the upper snap fastener of lower snap fastener (1282) cooperation.

19. pressure sensor (1100) as claimed in claim 11, it is characterised in that：

There are two opposite plane (1112,1114), described two planes for extension (1108) tool of the lid (1101) (1112,1114) are substantially parallel to the direction of the height (H) of the pressure sensor (1100), can be used in the pressure and pass Positioning when sensor (1100) is installed.

20. pressure sensor (1100) as claimed in claim 11, it is characterised in that：

The lid (1101) is integrally formed.