CN203631417U - A water flow sensing switch - Google Patents
A water flow sensing switch Download PDFInfo
- Publication number
- CN203631417U CN203631417U CN201320823720.9U CN201320823720U CN203631417U CN 203631417 U CN203631417 U CN 203631417U CN 201320823720 U CN201320823720 U CN 201320823720U CN 203631417 U CN203631417 U CN 203631417U
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- Prior art keywords
- induction circuit
- magnetic induction
- annular deformation
- circuit plate
- inductive switch
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 230000006698 induction Effects 0.000 claims abstract description 56
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000001939 inductive effect Effects 0.000 claims description 27
- 238000009434 installation Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 32
- 229910052742 iron Inorganic materials 0.000 description 16
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000965 Duroplast Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model relates to a sensing switch used for sensing a water flow pressure signal in a running water pipeline. The water flow sensing switch comprises a shell with a water inlet and a water outlet, an elastic resetting diaphragm member, a magnetic block and a magnetic induction circuit board. An installing cavity is arranged on the inner side of the shell. The water inlet of the shell is communicated with the water outlet through the installing cavity. The elastic resetting diaphragm member and the magnetic block are disposed on the inner side of the shell. The lower portion of the elastic resetting diaphragm member is a pushing pillar part elastically blocking the installing cavity and the upper portion of the elastic resetting diaphragm member is an annular deformation diaphragm fixedly connected to the outer peripheral wall of the top of the pushing pillar part. The top of the annular deformation diaphragm is pressed against the inner wall of one side of the shell. The magnetic induction circuit board is located on the outer side of the shell and the position of the magnetic induction circuit board is corresponding to the position of the annular deformation diaphragm. The magnetic block is embedded in the top end of the pushing pillar part. A sensing gap which changes along with the deformation states of the annular deformation diaphragm is reserved between the magnetic block and the magnetic induction circuit board. The water flow sensing switch is novel in structure and has the advantages of pressing signal sensing sensitivity, high stability, good using effect and long service life.
Description
Technical field
The utility model relates to a kind of pressure-sensitive switch, particularly relates to a kind of inductive switch of responding to water flow pressure signal in water pipe that is used in.
Background technology
Current inductive switch is a kind of inductive switch of responding to water flow pressure signal, when pressure during take certain threshold value as boundary, exceed certain threshold value or be less than certain threshold value, inductive circuit board can obtain corresponding induced signal, conversion output electrical signals.
Existing a kind of current inductive switch is to make by magnetic induction principle, and it accepts hydraulic signal by the magnet and the spring structure that pack in current chamber, and magnet and spring are all immersed in water.In the time that water flow pressure is larger, can make magnet near magnetic induction circuit plate by automatic Compression spring, thereby make magnetic induction circuit plate sense the magnetic field of magnet, export the signal of telecommunication opening or closing; On the contrary, when water flow pressure hour, spring extends and flicks magnet, makes it away from magnetic induction circuit plate and exports the signal of telecommunication contrary to the above.A period of time after use test but existing this current inductive switch circulates on market, there is following defect: 1. above-mentioned magnet is placed in current chamber, after using a period of time to wait, iron filings around magnet in easy adsorbed water, and the iron filings that absorption comes also can get rusty, cause the weight of magnet to strengthen, magnetic weakens, cause the induction of magnetic induction circuit plate insensitive, useful life is not long.2. spring material often adopts the metal material with iron, not only easily magnetization, and the exist phenomenons such as absorption iron filings accumulation iron rust the same as above-mentioned magnet, and himself be also easily corroded and get rusty after using a period of time, appearance elastic force is blocked, make equally the induction of magnetic induction circuit plate insensitive, useful life is short.3. because spring size is little, after these springs use a period of times that adopt current technique to make, occur resilience fatigue, resilience strength and length change, and cause the pressure threshold of induction to occur skew, and use error is large, weak effect.4. be linear relationship based on above-mentioned spring pressure and stroke, near the pressure threshold of hydraulic pressure near induction, be amount of spring compression make magnetic induction circuit plate and magnet distance in the time of induction zero dividing value, easily cause magnetic induction circuit plate to occur that switching signal frequently beats.
Utility model content
Based on above-mentioned defect, goal of the invention of the present utility model aims to provide a kind of novel structure, inside is not prone to iron filings and iron rust viscous without spring, magnetic patch, induction pressure signal stabilization, the current inductive switch that sensitive and durability is good.
In order to realize foregoing invention object, the utility model has adopted following technical scheme:
A kind of current inductive switch, comprises that two ends are respectively equipped with the housing of water inlet and delivery port, elastic reset film part, magnetic patch and magnetic induction circuit plate; Described housing inner side is provided with installation cavity, and the water inlet on housing is communicated with delivery port by installation cavity; Described elastic reset film part and magnetic patch are in housing inner side, and the bottom of described elastic reset film part is that elasticity gets lodged in the pushing post portion in installation cavity, top be one around and be fixedly connected on the annular deformation film of pushing post portion top periphery wall; Described annular deformation film top is pressed on housing one side inwall; Described magnetic induction circuit plate is in hull outside and its position is corresponding with the annular deformation film in housing; Described magnetic patch is inlaid in pushing post portion top ends; Described magnetic patch is to leaving the induction spacing changing with annular deformation film deformed state between magnetic induction circuit plate.
As preferably, the upper cover that described housing covers main casing top end opening by the main casing of top end opening and sealing forms; Described annular deformation film top is pressed on upper cover inwall, and magnetic induction circuit plate correspondence is arranged on upper cover lateral wall, this easy-disassembling-assembling structure, and not only assembled product is time saving and energy saving, is easy to change housing inner part, easy to maintenance.
As preferably, described pushing post portion peripheral part is also fixed with one for coordinating the hard engage sleeves of installation cavity.
As preferably, on described upper cover lateral wall, be also provided with wiring board mounting groove, magnetic induction circuit plate setting-in enters in wiring board mounting groove, and described wiring board mounting groove notch is also provided with one for covering the cover plate of magnetic induction circuit plate.It is in order to reduce upper cover, the induction in magnetic patch magnetic field to be intercepted that wiring board mounting groove setting-in enters one of object in wiring board mounting groove, makes magnetic field more easily penetrate wiring board mounting groove bottom land thin-walled; Magnetic induction circuit plate is enclosed in inner side by the cover plate for covering magnetic induction circuit plate that two of object is conveniently to install additional, not only overall appearance but also prevent that magnetic induction circuit plate is outside exposed and fragile.
As preferably, described annular deformation film is provided with at least one pressure compensation opening, while making annular deformation film deformation, be not subject to the excessive interference of inside and outside differential pressure, stop pressure jump and cause malfunction deformation, make each deformation more regular stable, thereby make current inductive switch stability of the present utility model high, durability is better.
Further, the quantity of described pressure compensation opening is two, the symmetrical setting in position of two pressure compensation openings, and with respect to single pressure compensation opening and more than three pressure compensation opening, the deformation of annular deformation film is stablized sensitive more, and result of use is better.
As preferably, the oral area of described water inlet and the oral area of delivery port are respectively equipped with the first snap joint and the second snap joint, facilitate current inductive switch to pack pipeline into.
Current inductive switch of the present utility model has adopted technique scheme, this current inductive switch compared with prior art, adopt elastic reset film part to substitute spring, change magnetic patch to the distance of reaction between magnetic induction circuit plate by the elastic reset film part deformation on it, make magnetic induction circuit plate sense having or not of magnetic signal, thus output switching signal.This inside, without the structural design of spring, has overcome spring and has been magnetized, absorption iron filings and iron rust, and the defect of the offset error that causes of spring fatigue, and induction pressure signal is sensitive and stable, and durability is good.Magnetic patch is because be inlaid on elastic reset film part, even the space that magnetic patch peripheral part and bottom all do not have viscous iron filings and produce iron rust, and magnetic patch top enables to adsorb a small amount of iron filings, also in the time of annular deformation film deformation, push up and down in the water environment of annular deformation film upside and take away iron filings with entering of water, therefore on its magnetic patch, be not prone to iron filings and iron rust viscous.In addition, the annular deformation film deformation on elastic reset film part is the sudden change of a kind of upper and lower elasticity, be different from spring with the linear collapsing length of pressure, therefore it does not exist magnetic induction circuit plate to occur the phenomenon that switching signal is frequently beated, good stability.
In a word, adopt the not only novel structure of current inductive switch of such scheme design, stop to get rusty, magnetize absorption iron filings, resilience fatigue due to what spring and spring material caused, the weak uneven defect of resilient beam, and have that induction pressure signal is sensitive, stability is high, the advantages such as result of use is good, and the life-span is long.
Accompanying drawing explanation
Fig. 1: the part explosive view of the utility model embodiment.
Fig. 2: the schematic perspective view after the assembled formation of the utility model embodiment.
Fig. 3: in the utility model embodiment under the low hydraulic pressure of current inductive switch, the cross-sectional view of elastic reset film part undeformed state.
Fig. 4: in the utility model embodiment under the high hydraulic pressure of current inductive switch, the cross-sectional view of elastic reset film part deformed state.
Fig. 5: the elastic reset film part perspective view in the utility model embodiment.
Fig. 6: the elastic reset film part cross-sectional view in the utility model embodiment 2.
Fig. 7: the elastic reset film part cross-sectional view in the utility model embodiment 3.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
Embodiment 1:
As shown in Figure 1, Figure 2, a kind of current inductive switch shown in Fig. 3, Fig. 4 and Fig. 5, this current inductive switch comprises housing, elastic reset film part 5, magnetic patch 4 and magnetic induction circuit plate 8.This housing entirety is square, the upper cover 6 that its main casing 1 by top end opening and sealing cover main casing 1 top end opening forms, longitudinally be provided with four screws 11 along 1 four jiaos of bights of square main casing, accordingly, be provided with four four through holes 61 that pass for screw 7 along 6 four jiaos of bights of square upper cover, upper cover 6 is fastened on main casing 1 top by four screws 7, and so that main casing 1 top end opening is sealed, the mode that this sealing covers is for convenience detach.Certainly, for housing, also can adopt other known sealings to cover mode, even can also its upper cover 6 and main casing 1 be connected as a single entity with ultrasonic bonding, make it to become non-removable entirety.
Above-mentioned housing two ends are that main casing 1 two ends, left and right are respectively equipped with water inlet 12 and delivery port 13, and as shown in Figure 1 and Figure 4, housing inner side is provided with installation cavity 10, and the water inlet 12 of right-hand member is communicated with the delivery port 13 of left end by installation cavity 10.Installation cavity 10 specifically comprises the cylindrical interior volume of Gong the columnar part longitudinally-moving that cylindrical wall surrounds and is communicated with the inside and outside outlet pass 101 of cylindrical wall.The bottom of cylindrical interior volume and water inlet 12 are communicated with, and delivery port 13 the inners extend to around the peripheral place of cylindrical wall, and connect into the mouth of a river 12 by the outlet pass 101 on installation cavity 10.In the present embodiment figure, outlet pass 101 concrete shapes are one group of longitudinal grooveds that cylindrical wall longitudinally excised into grid post, certainly also can adopt the shape of other known outlet passes 101.
As shown in Figure 3 and Figure 4, above-mentioned elastic reset film part 5 and magnetic patch 4 are in housing inner side, above-mentioned elastic reset film part 5 bottoms are the pushing post portions 53 that stretch into installation cavity 10, when pushing post portion 53 adopts elasticity flexible glue material to make, in order to coordinate better the cylindrical interior volume on installation cavity 10, pushing post portion 53 peripheral parts are also fixed with one for coordinating the hard engage sleeves 50 of installation cavity 10, to improve quality of fit.The material that hard engage sleeves 50 adopts is the duroplasts that is easy to processing, corrosion-resistant and deformation, and adopts tight fit mode fixed thereon with pushing post portion 53, with its motion campaign.Above-mentioned elastic reset film part 5 tops be one around and be fixedly connected on the annular deformation film 52 of pushing post portion 53 top outer walls.When annular deformation film 52 and above-mentioned pushing post portion 53 are identical elasticity flexible glue materials, annular deformation film 52 and pushing post portion 53 are connected as a single entity, and adopt the elastic reset film part 5 of such one, mix hard engage sleeves 50, although manufacturing cost is slightly high, durability is fine.As shown in Figure 3, under low hydraulic pressure or nature, pushing post portion 53 elasticity get lodged in installation cavity 10, specifically block up the cylindrical interior volume into installation cavity 10 completely by pushing post portion 53 and being enclosed within its outer hard engage sleeves 50, intercept the outlet pass 101 on above-mentioned cylindrical wall.The middle part on above-mentioned pushing post portion 53 tops is provided with the magnetic patch of magnetic patch 4 form fit dead slot 530 is installed, and magnetic patch 4 is inlaid in the magnetic patch at the middle part on pushing post portion 53 tops and installs in dead slot 530.Annular deformation film 52 top are provided with the sealing shirt rim 51 that a circle is connected as a single entity with it, and it is pressed on upper cover 6 inwalls.Above-mentioned upper cover 6 lateral walls are provided with a wiring board mounting groove 60, and magnetic induction circuit plate 8 setting-ins enter in wiring board mounting groove 60, and wiring board mounting groove 60 notches are also provided with a cover plate 9, and cover plate 9 covers magnetic induction circuit plate 8, prevent that it is outside exposed and are not durable.Magnetic induction circuit plate 8 positions are corresponding with annular deformation film 52 and magnetic patch 4 positions of upper cover 6 inner sides, but under low hydraulic pressure or nature, annular deformation film 52 undeformeds, magnetic patch 4 can not make magnetic induction circuit plate 8 magnetic signal be detected to the induction spacing between magnetic induction circuit plate 8.In the time that the interior hydraulic pressure of installation cavity 10 is greater than certain pressure threshold value, hydraulic pressure can promote to push post portion 53 relatively away from installation cavity 10 direction activities, push away and make annular deformation film 52 deformation, because of only local stretching in the cylindrical interior volume of installation cavity 10 of pushing post portion 53, outlet pass 101 is communicated with cylindrical interior volume, so that installation cavity 10 is communicated with water inlet 12 and delivery port 13, and make magnetic patch 4 reduce to and can make magnetic induction circuit plate 8 magnetic signal be detected to the spacing between magnetic induction circuit plate 8.5 elastic deformations of elastic reset film part and the reset activity of summing up above-mentioned hydraulic pressure and form, magnetic patch 4 changes with annular deformation film 52 deformed state to the induction spacing between magnetic induction circuit plate 8, thereby can make magnetic induction circuit plate 8 sense magnetic signal according to this induction spacing, draw switching value output signal.The low tension switch that this current inductive switch can be used as normally closed high-voltage switch gear or often opens in purposes, can be widely used in control system.
Certainly, for economization manufacturing cost, above-mentioned elastic reset film part 5 also can adopt rigid plastics to make pushing post portion 53, at this moment just no longer need above-mentioned hard engage sleeves 50, and annular deformation film 52 and pushing post portion 53 is fixedly connected on the top outer wall of pushing post portion 53.
In order to make better annular deformation film 52 elastic deformations, its work is stablized more sensitive, annular deformation film 52 of the present utility model is provided with pressure compensation opening 520, so, also water flowing in the space that annular deformation film 52 and upper cover 6 inwalls surround, be convenient to annular deformation film 52 internal and external pressure balances, make to push post portion 53 and can rise more easily and drive annular deformation film 52 deformation.If there is no pressure compensation opening 520, in delivery port 13 water pressures when excessive or when water pressure fluctuations, easily make annular deformation film 52 misoperations, react mistakenly magnetic induction signal to magnetic induction circuit plate 8, build-up of pressure detects mistake, thereby make this current inductive switch occur false sense should, cause stability bad; Simultaneously, if there is no pressure compensation opening 520, even if being raised, the top edge that also easily impels annular deformation film 52 and upper cover 6 inwalls to compress contact position discharges air or water in the time of annular deformation film 52 each deformation, thereby cause annular deformation film 52 deformation irregular, repeatedly after deformation, easily cause it to coordinate with upper cover distortion.In order to make better annular deformation film 52 deformation, preferably two of the quantity of pressure compensation opening 520, the position of two pressure compensation openings 520 is divided on the annular deformation film 52 that is in pushing post portion 53 both sides, and symmetrical setting.
In addition, the pipeline that is connected and is communicated with delivery port 13 for the pipeline being communicated with water inlet 12 is fast connected, and the oral area of the oral area of water inlet 12 and delivery port 13 is respectively equipped with the first snap joint 2 and the second snap joint 3.The second snap joint 3 is identical with the first snap joint 2 shapes, all formed by casing section 21, sealing ring 23 and circular mounting 20, sealing ring 23 is arranged between the oral area or delivery port 13 oral areas that casing section 21 inner sides are in casing section 21 and water inlet 12, the inner fixed cover of casing section 21 is on the oral area or delivery port 13 oral areas of water inlet 12, and the outer end mouth of pipe of casing section 21 is anticreep mouths that internal diameter dwindles from the inside to the outside.Circular mounting 20 is arranged on anticreep mouth, and the outer end of circular mounting 20 is in anticreep mouth outside, and inner end extends anticreep mouth inner side; Circular mounting 20 the inners are provided with the multiple arc dops corresponding with anticreep mouth, and multiple arc dops are in anticreep mouth to deviate from, and the madial wall of arc dop is provided with metal card article.When use, outside pipeline is inserted from casing section 21, run through successively circular mounting 20 and sealing ring 23.Again when the metal card article, can make above-mentioned multiple arc dop radially outward elasticity open.Then run through sealing ring 23 and complete sealing.Rollback pipeline again, makes metal card article clamping pipeline lateral wall, and the arc dop that outwards elasticity is opened is tightly stuck on anticreep mouth, and rollback stroke is larger, just on anticreep mouth, blocks tightlyer, can not deviate from again.
Embodiment 2:
On the basis of embodiment 1, as shown in Figure 6, annular deformation film 52 shapes of the present embodiment are to point to the arc-shaped concave of oblique upper by inner recess to surround, and annular deformation film 52 in the present embodiment is provided with two pressure compensation openings 520.
Embodiment 3:
On the basis of embodiment 1, as shown in Figure 7, annular deformation film 52 shapes of the present embodiment clinoplain that to be annular deformation film 52 point to oblique upper by intersection point surrounds, and annular deformation film 52 in the present embodiment is provided with two pressure compensation openings 520.
Claims (7)
1. a current inductive switch, is characterized in that: comprise that two ends are respectively equipped with the housing of water inlet (12) and delivery port (13), elastic reset film part (5), magnetic patch (4) and magnetic induction circuit plate (8); Described housing inner side is provided with installation cavity (10), and the water inlet (12) on housing is communicated with delivery port (13) by installation cavity (10); Described elastic reset film part (5) and magnetic patch (4) are in housing (1) inner side; The bottom of described elastic reset film part (5) is that elasticity gets lodged in the pushing post portion (53) in installation cavity (10), top be one around and be fixedly connected on the annular deformation film (52) of pushing post portion (53) top periphery wall; Described annular deformation film (52) top is pressed on housing (1) one side inwall; The annular deformation film (52) that described magnetic induction circuit plate (8) is in outside housing (1) and its position is interior with housing (1) is corresponding; Described magnetic patch (4) is inlaid in pushing post portion (53) top ends; Described magnetic patch (4) is to leaving the induction spacing changing with annular deformation film (52) deformed state between magnetic induction circuit plate (8).
2. a kind of current inductive switch according to claim 1, is characterized in that: the upper cover (6) that described housing covers main casing (1) top end opening by the main casing (1) of top end opening and sealing forms; Described annular deformation film (52) top is pressed on upper cover (6) inwall, and magnetic induction circuit plate (8) correspondence is arranged on upper cover (6) lateral wall.
3. a kind of current inductive switch according to claim 1, is characterized in that: described pushing post portion (53) peripheral part is also fixed with one for coordinating the hard engage sleeves (50) of installation cavity (10).
4. a kind of current inductive switch according to claim 2, it is characterized in that: on described upper cover (6) lateral wall, be also provided with wiring board mounting groove (60), magnetic induction circuit plate (8) setting-in enters in wiring board mounting groove (60), and described wiring board mounting groove (60) notch is also provided with one for covering the cover plate (9) of magnetic induction circuit plate (8).
5. a kind of current inductive switch according to claim 1, is characterized in that: described annular deformation film (52) is provided with at least one pressure compensation opening (520).
6. a kind of current inductive switch according to claim 5, is characterized in that: the quantity of described pressure compensation opening (520) is two, the symmetrical setting in position of two pressure compensation openings (520).
7. a kind of current inductive switch according to claim 1, is characterized in that: the oral area of the oral area of described water inlet (12) and delivery port (13) is respectively equipped with the first snap joint (2) and the second snap joint (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320823720.9U CN203631417U (en) | 2013-12-12 | 2013-12-12 | A water flow sensing switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320823720.9U CN203631417U (en) | 2013-12-12 | 2013-12-12 | A water flow sensing switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203631417U true CN203631417U (en) | 2014-06-04 |
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ID=50817869
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320823720.9U Expired - Fee Related CN203631417U (en) | 2013-12-12 | 2013-12-12 | A water flow sensing switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203631417U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106504941A (en) * | 2016-12-27 | 2017-03-15 | 中山市博安泰电器科技有限公司 | A kind of novel differential pressure switch |
-
2013
- 2013-12-12 CN CN201320823720.9U patent/CN203631417U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106504941A (en) * | 2016-12-27 | 2017-03-15 | 中山市博安泰电器科技有限公司 | A kind of novel differential pressure switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180706 Address after: 310052 1, -11 5, No. 11, Ju Gong Road, Binjiang District Xi Xing street, Hangzhou, Zhejiang. Patentee after: HANGZHOU LESHOU TECHNOLOGY Co.,Ltd. Address before: 315327 room 503, unit 2, building 3, Binhai Longwan District, Cixi, Ningbo, Zhejiang Patentee before: Tong Yonghua |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 |