CN1755339A - Sensor, particularly pressure sensor fixed on container - Google Patents
Sensor, particularly pressure sensor fixed on container Download PDFInfo
- Publication number
- CN1755339A CN1755339A CN 200410012080 CN200410012080A CN1755339A CN 1755339 A CN1755339 A CN 1755339A CN 200410012080 CN200410012080 CN 200410012080 CN 200410012080 A CN200410012080 A CN 200410012080A CN 1755339 A CN1755339 A CN 1755339A
- Authority
- CN
- China
- Prior art keywords
- housing
- sensor device
- sensor
- stationary installation
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a pressure transformer which comprises a casing (20, 22), a front transformer (24) and a transformer fixed apparatus (25, 26, 27, 28) used to fix the transformer (24) on the casing (20, 22). The transformer (24) fixed device (25, 26) is connected with the transformer (24) from the part of middle brace around of the front edge area and is connected with the casing.
Description
Technical field
The present invention relates to a kind of sensor that is used for fixing on container, particularly pressure transducer, it has the feature of the preamble of claim 1 and 7, and the method that is used for sensor installation.
Background technology
Usually, a sensor fixedly is known on a container, so that measure the parameter about container contents or container intracavity.For example in paper industry, adopt particularly pressure tester as pressure transducer, in order to the pressure in the inner chamber of measuring container.
So far known sensor comprises the housing that is threaded having one as pressure tester textural, by being threaded housing is tightened against from the outside in the container through hole of container inner face.Wherein known pressure transducer as many silicon pressure sensors, it transmits seal fluid in conjunction with a pressure and uses, or pressure transducer, and it is configured with the capacitive pressure transducer element of a pottery.
The system that comprises many silicon pressure sensors has the overload intensity that little compressive resistance impacts, because supporting sensor element fully.In addition, for having the doubt that increases day by day in conjunction with the application that a pressure transmits packoff, because constantly improve the requirement of the possible pollution of the anti-medium that transmits seal fluid by measurement mechanism or its pressure at the such pressure transducer of the medium in the container.
The system that comprises the capacitor pressure sensor component of pottery constitutes to be made pressure sensor component pass through a stationary installation promptly to connect over there to process from the outer inner face towards container of container and install, and resist thus by the pressure action of medium in the container to be detected be supported.The shortcoming of such form of implementation is, hole by container through hole and the end face by the sensor housing wherein of packing into only is fit to have the pressure sensor component of corresponding significantly less diameter, therefore reduce measuring accuracy, the reduction of measuring accuracy is because than be in disadvantageous basic electric capacity and the ratio of measuring electric capacity than major diameter the time.
Summary of the invention
The objective of the invention is to, propose a kind of pressure transducer, it has such structure, promptly compares with the external diameter of the front of sensor housing, can make actual sensor element that the big as far as possible diameter of ratio sensor device is arranged.In addition, particularly the setting of each parts in housing at sensor will propose a kind of improved device, and it also can make housing have the structure that little generally size is determined.Advantageously also be proposed to be used in the method for making such sensor.
The pressure transducer of the feature of this purpose by having claim 1 and comprise that the pressure transducer of structure of the feature with claim 7 of independent invention reaches.The advantageous method that is used to make such sensor is the theme of claim 9 and 12.
Advantageously, pressure transducer comprises a housing with a longitudinal axis a, front or end face and stretch into sensor device and one sensor device-stationary installation in the container through hole under installment state, is used for sensor device on housing or interior fixing.In order to obtain saving the structure in space, sensor device-stationary installation is rabbeted sensor device around the front is the part of the fringe region of the front of sensor device at least, make it be subjected to the supporting of front whereby.Sensor device-stationary installation advantageously is provided with because of corresponding the fixing in housing and strengthens excircle.What conformed with purpose this moment fixedly is a seam, particularly hot joining seam.
Constitute external thread on the circumferential wall at housing in the zone of the back of sensor device, be used for housing fixing at the internal thread of container through hole.What wherein conform with purpose is that the excircle of sensor device-stationary installation is less than or equal to the root footpath of screw thread, thereby can almost completely utilize the diameter of container through hole with regard to the external diameter of sensor device.Has only sensor device-stationary installation at the wall of sensor device side guiding with the supporting member limiting sensor device surface that can effectively utilize of interlocking in front.
In method, sensor device advantageously is installed in housing from the front or is positioned on wherein other the parts and connects it, wherein for the supporting sensor device from front cover upper sensor device-stationary installation and be fixed on the housing.Conform with the destination this moment and realize fixingly as seam, the least possible heat energy and as far as possible little electromagnetic field wherein should take place, advantageously even do not have the effect of electromagnetic field, so that the sensor device-stationary installation that makes up and the material of housing fuse together.Avoid the pressure sensor component of stupalith system and the directly damage of the body seal of adjacency whereby.
Determine that according to a particularly preferred and favourable size can make a sensor by such setting or method, wherein the external diameter of sensor device is compared only smaller slightly with externally threaded footpath of sensor housing-stationary installation.In this case, can realize preferred standard pressure sensor component this proportionate relationship as the external diameter of sensor device and standard thread root footpath, wherein, spacing is as far as possible little, and to have a wall thickness be half sensor device-stationary installation of diameter difference.The typical external diameter of a for example known pressure sensor component is 28mm, wherein such sensor element can be installed on the sensor housing with root footpath 30.29mm in described setting, and this root footpath directly is used for the stationary installation of container through hole or corresponding housing as typical hole root with externally threaded form.The external diameter of sensor device or sensor element is 90% or bigger with respect to being used for sensor in the proportionate relationship of the fixing core diameter of thread of container through hole in this example, particularly 92.4%.
For the quantity that reduces parts with for size that reduces parts and the size that finally reduces all sensors; design according to independent invention is also advised; but a module type housing for example has the material of Electronic system chassis on the coating of soldering or surface is designed so that itself and the compressing an of retaining element or another element, particularly pressing, but make soldering coating part fusion and squeeze and therefore after it solidifies formation electrically contact so that protect electronic system to avoid electromagnetic effect and/or guarantee potential balance.This has been avoided the contact, wiring element and the Connection Element that provide independent.
Favourable design is the theme of each dependent claims.
Description of drawings
Below illustrate in greater detail an embodiment by means of accompanying drawing, wherein,
At least the local transverse section of Fig. 1 one sensor, its screw thread is tightened against in the container through hole of a container.
Embodiment
Fig. 1 illustrates the part section of container 1, particularly can fix a sensor 2 on it with dismantling again.Container 1 has a wall 11, and the part shown in it for example also can constitute a flange or other the fixing element as original container 1 that is threaded.
One container through hole 13 leads to the outside by wall 11 from container inner face 12.Container has container internal thread 14 by 13 over there to the outside of container 1, and it is used for being threaded of sensor 2.Sealing for the sensor 2 of packing into, container through hole 13 also has the container groove 15 of an annular at inner face, one elastic sealing element wherein is installed, O type figure for example flows to outside over there without any medium by the gap between container through hole 13 and wherein the sensor 2 of packing into and make from container inner face 12.
Sensor 2 comprises a housing 20, and it is made up of a plurality of single-pieces in the embodiment shown.The housing 20 of example has the housing parts 22 of a back housing parts 21 and a front, represents in front under mounted state that wherein each member represents opposite direction in the back to the orientation of container inner face 12 directions or one side.Wherein the explanation in relevant orientation only is used for representing intuitively each parts location to each other.Constitute the housing-stationary installation 23 of external thread 23 forms in the circumferential area of the side of the front portion of housing parts 22 in front.By means of this external thread 23 sensor 2 screw threads are tightened in the internal thread 14 of container through hole 13, so that sensor 2 is fixed on the container 1.
The pressure sensor component 24 of actual sensor device 24, particularly a pottery is installed in the end face of housing parts 22 of front or an end of front.One sensor device-stationary installation 25 is used for the fixing of sensor device 24, its basically looping and in the side end face from the housing parts 22 of front reach out to rabbet sensor device 24 on every side up to the front of crossing sensor device 24.The very thin thickness that wherein keeps sensor device-stationary installation as far as possible is so that make the diameter d of sensor device 24 on the other hand for sensor device 24 provides the supporting on housing 20,22 reliably on the one hand
sCan constitute almost inner diameter d as container through hole 13
BEqually big.This makes it possible to adopt the diameter d with optimal size
sSensor device 24, this finally prevents the common reduction of measuring accuracy and improves measuring capacity.
In order sensor device 24 to be fixed on the housing 20,22 and in the container through hole 13, sensor device-stationary installation 25 has and one or morely inwardly stretches in the container through hole 13 or inward-pointing protuberance 26.Shown in the form of implementation, its inward-pointing protuberance 26 constitutes the flange 26 bending and annular of cylindrical or annular in addition sensor device-stationary installation 25.For the bore seal container inner face 12 of housing 20,22 and keep the surface of the front of sensor device 24 to avoid mechanical damage on the other hand relatively on the one hand, the O-ring seal 27 of one or more seals 27, a preferred annular is installed between the front of inward-pointing protuberance 26 and sensor device 24.
For fixing on sensor device-stationary installation 25 housing parts 22 upper surface parts in front, establish a seam and connect 28.For example realize with so few heat energy when the assembling as the seam 28 of the housing ring of sensor device-stationary installation 25 with the form of light wave, on the one hand two parts are fused together, and do not cause particularly constituting the pressure sensor component of pottery or the directly damage of the body seal 27 of adjacency, and any electromagnetic field does not take place on the other hand, this electromagnetic field may damage the sensor electrical subsystem 33 that connects in the sensor 2.Correspondingly, element 25,22 preferable alloy parts to be made up, it utilizes particularly that light wave fuses together as heat energy.Also can adopt other material it to be fused together or make it to connect with glueing material where necessary with corresponding suitable method.
Sensor device 24 the fixing on housing 20 that perhaps replaces design like this, also can provide a kind of sensor fastening device to be used for sensor is fixed on the container 1 and do not have other shown in parts, it also has the advantage in space for the surface of available sensor device 24 except simple assembling.For example utilize such device can so fix a pottery the electric capacity effect, have a for example standard pressure transducer element of 28mm diameter, the 30.29mm of the container internal thread 14 in that the root footpath of wherein general screw thread G1 (according to Deutsche industry norm (DIN) DIN ISO 228-1) can define housing the external thread 23 or container through hole 13.Keep enough wall thickness 1-1.14mm for sensor device-stationary installation 25, so that rabbet sensor device 24 on every side.However, the wall that constitutes later at sensor device 24 of the housing parts 22 of front has enough thickness, so that provide enough stability and supportings for sensor 2 in the zone of container internal thread 14.This finally pressure sensor component can be installed from process towards stationary installation or in the housing parts 22 of front thus and the direction in its outside is supported, and wherein sensor device-the stationary installation 25 and the seal 27 of 30mm external diameter are supported pressure sensor component 24 as having particularly by the housing ring of seam.
In the embodiment shown, from sensor device 24 draw a pressure equilibrium conduit 30 by housing 20 inner chamber and other parts, particularly sensor electrical subsystem 33 so that guarantee air balance to pressure sensor component, it is known as this.
In addition, draw one or more leads as the electric wiring 32 to sensor electrical subsystem 33 from sensor device 24, sensor electrical subsystem 33 is contained in the interior Electronic system chassis 34 of housing 20-22.Wherein electric wiring or a plurality of electric wiring 32 are guided first thin plate 35 into and are guided corresponding circuit and/or electronic component thereon into.To the connection of second thin plate 36, itself and first thin plate, 35 spaced apart being installed in the Electronic system chassis 34 are realized as such connection via the connection between first and second thin plate 35,36 and/or via Electronic system chassis 34 in the embodiment shown.
As mentioned, can realize being electrically connected between two thin plates 35 and 36 via Electronic system chassis 34.The circuit of the mutually insulated of necessary amount suitably is set on Electronic system chassis 34 for this reason.These circuits, its in Fig. 1 with mark 38 expression, can be for example by electrically contact the contact that on thin plate 35 and 36, is provided with, for example self-cleaning contact at avris.So as to guaranteeing being electrically connected between upper thin sheet 36 and the lower thin sheet 35.Can advantageously cancel independent connector in such form of implementation connects.
In order to ensure the electromagnetic screen of the optimum of sensor device 24 and sensor electrical subsystem 33, but between the step-like protuberance on the housing parts 22 of the lower surface of Electronic system chassis 34 and front, insert the material of a soldering.Because transducer module sandwich type element 34 and housing 22 are made of metal, but the conduction of the material 37 that the enough strong extruding of two parts causes soldering formation reinforcement between the housing parts 22 of module type housing 34 and front is connected.Thereby the original seam that exists between the housing parts 22 of sealing module sandwich type element 34 and front.
Pressing for such conduction connects, and Electronic system chassis not necessarily needs to be made of metal fully.Enough is, but but the housing parts 22 of Electronic system chassis 34 and front has the material of soldering or the coating of soldering at least on the outer surface.The pressing of the housing parts 22 by Electronic system chassis 34 and front.It is fixing that but the heating that utilization is in case of necessity accompanied or the material heating of soldering are close to both each other, but the material of at this moment unnecessary soldering is squeezed.Compressing particularly after pressing and cooling, constitute the firm connection of conduction.
The stationary installation that is threaded that has of other of the housing parts 22 of protection inner chamber of housing 20 and front or sensor device 24 usefulness is avoided pollution because of the medium that enters by the seal 27 welding or the sensor device-stationary installation 25,26 of welding from container inner face 12.Therefore also can not have the medium of any pollution to enter in the inner chamber of remaining housing 20 because the seal 27 of annular relatively sensor device 24 sealed the housing ring of formation sensor device-stationary installation 25.
Shown embodiment can be retrofited with various modes and method.Like this, for example wall 11 constitutes the wall between the outside of the container inner face 12 of seeing the front from sensor 2 and container 1.Nature, opposite setting also is possible,, comes out to point to the open environment in an outside comprising the front of the sensor 2 of sensor device 24 from container that is.
List of numerals
1 container, 30 pressure balance conduits
The 32 electric wiring of 11 chamber walls
12 container inner faces, 33 inductor electronic systems
13 container through holes, 34 Electronic system chassis
14 container internal threads, 35 first thin plates
15 container grooves, 36 second thin plates
16 seals (container/sensor), 37 contacts
2 sensors, 38 circuits
20 housings
The housing parts of 21 back
The housing parts of 22 fronts
The stationary installation of 23 housings (external thread)
24 sensor devices/pressure sensor component
25 sensor devices-stationary installation
26 inward-pointing protuberances
27 seals (24 pairs 25)
28 seams
d
sThe diameter of sensor device 24
d
BThe root footpath of internal thread 14
Claims (15)
1. sensor (2) comprising:
One housing (20);
One sensor device (24) and
One sensor device-stationary installation (25,26,27,28) is used for the part (22) of sensor device (24) in the front of housing (20) and goes up and/or interior fixing;
It is characterized in that sensor device-stationary installation (25,26) is rabbeted sensor device (24) support ground from the part of front fringe region at least in front around.
2. according to the described sensor of claim 1, it is characterized in that, establish the stationary installation (23) of a screw thread (23) in the zone with respect to sensor device (24) back on the circumferential wall of housing (20) as housing.
3. according to the described sensor of claim 2, it is characterized in that the excircle of the stationary installation of sensor device (25) is less than or equal to the root footpath (d of screw thread (23)
B).
4. according to one of an aforesaid right requirement described sensor, it is characterized in that the stationary installation of sensor device (25) is fixed on the housing (20,22) by means of a seam (28).
5. according to the described sensor of claim 4, it is characterized in that seam (28) is a heat fusing seam.
6. according to one of an aforesaid right requirement described sensor, it is characterized in that, between sensor device (24) and sensor device-stationary installation (27,26), a seal (27) space of bore seal sensor device (a 24) front before of housing (20) is relatively arranged.
7. particularly according to one of an aforesaid right requirement described sensor (2), comprise that a housing (20,21,22) is in order to hold a sensor device (24), a module type housing (34) and at least one electric wiring (32,37) between the part of housing (22) and the module type housing (34) that is connected with it, it is characterized in that, at least a portion (37) of module type housing (34) and/or housing (22) at its join domain (37) but in form by a kind of material of soldering at least from the teeth outwards, and the pressing that forms a conduction of strengthening connects.
8. be used for going up fixing stationary installation at container (1), comprise according to one of aforesaid right requirement described pressure transducer (2):
The wall (11) of one container (1);
One container through hole (13), it particularly passes through wall (11) from container inner face (12) to the outside of container (1);
The housing (20) of one sensor (2);
One sensor device (24) in housing (22,27) is in order to measure a measured value;
The stationary installation of one housing (23) is used for housing (20) fixing in container through hole (13,14) zone; And
One sensor device-stationary installation (25-28) is used for sensor device (24) and goes up or interior fixing at housing (20,22);
It is characterized in that,
The stationary installation of housing (23) is fixing particularly being tightened against in the container through hole (13) under assembled state; And
Sensor device-stationary installation (25) is particularly rabbeted sensor device (24) from the front around container inner face (12) supporting ground, and on the stationary installation (23) of container through hole (13) internal fixation at housing.
9. be used for the method for sensor installation (2), it is characterized in that,
In front a sensor device (24) is installed on the housing (20);
Rabbet sensor device (24) on every side and be pressed to the front of housing (22) by means of one sensor device-stationary installation (25), wherein, sensor device-stationary installation (25) is done at least one inward-pointing in front protuberance (26) and at least one extends to the circumferential wall (25) of the front of housing (20) always along sensor device (24); And
Sensor device-stationary installation (25) utilize one firm and closely seam (28) be fixed on the front of housing (20).
10. in accordance with the method for claim 9, it is characterized in that described seam is by thermosetting, wherein select enough little energy, so that the sensor device (24) that is made of stupalith particularly is not subjected to fire damage.
11., it is characterized in that described seam does not have to form the electromagnetic field of the electronic unit that may damage sensor (2) according to claim 9 or 10 described methods.
12. be used for sensor installation (2) and be used for module type housing (34) be fixed on the part of another housing parts (22), particularly by the method in the sensor (2) of claim 7, it is characterized in that,
Described module type housing (34) and/or described another housing parts (22) but have at least one surface that constitutes by the material of soldering and
Under the situation of described material incipient melting, module type housing (34) and another housing parts are compressed mutually, but the material of fusion soldering also makes the described element that is pressed together connect securely later in material cured, so that it is fixed to one another and form between them and electrically contact.
13. the sensor according to one of claim 1-8 described sensor or utilization are made according to one of claim 9-12 described method is characterized in that the external diameter (d of sensor device (24)
s) with external thread (14) root of sensor housing-stationary installation (23) footpath (d
B) compare only smaller slightly.
14. according to the described sensor of claim 13 (2), wherein as the external diameter (d of the standard pressure transducer element of sensor device (24)
s) and standard thread root footpath (d
B) have a proportionate relationship, make mutual spacing as far as possible little, and to have a wall thickness be half ((d of diameter difference
B-d
s)/2) sensor device-stationary installation (25).
15., it is characterized in that the external diameter (d of sensor device (24) according to one of an aforesaid right requirement described sensor (2)
s) be the core diameter of thread (d with the one sensor housing-stationary installation (23) of sensor device (24) adjacency
B) at least 90%, particularly at least 92.4%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100120809A CN100443873C (en) | 2004-09-28 | 2004-09-28 | Sensor, particularly pressure sensor fixed on container |
| HK06105482.8A HK1085535A1 (en) | 2004-09-28 | 2006-05-11 | A sensor, specifically a pressure sensor, to be fastened to a receptacle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100120809A CN100443873C (en) | 2004-09-28 | 2004-09-28 | Sensor, particularly pressure sensor fixed on container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1755339A true CN1755339A (en) | 2006-04-05 |
| CN100443873C CN100443873C (en) | 2008-12-17 |
Family
ID=36688765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100120809A Expired - Fee Related CN100443873C (en) | 2004-09-28 | 2004-09-28 | Sensor, particularly pressure sensor fixed on container |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100443873C (en) |
| HK (1) | HK1085535A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460101A (en) * | 2009-05-20 | 2012-05-16 | 微型金属薄膜电阻器有限公司 | Pressure sensor |
| CN102840871A (en) * | 2011-06-23 | 2012-12-26 | 横河电机株式会社 | Sensor unit |
| CN103688141A (en) * | 2011-07-20 | 2014-03-26 | 罗伯特·博世有限公司 | Sensor device, in particular for use in a motor vehicle |
| CN104870963A (en) * | 2012-12-27 | 2015-08-26 | 罗伯特·博世有限公司 | Pressure sensor arrangement and method for mounting a pressure sensor arrangement |
| CN105960585A (en) * | 2014-03-17 | 2016-09-21 | 恩特葛瑞斯-捷特隆解决方案公司 | Disposable liquid chemical sensor system |
| CN106052940A (en) * | 2015-04-10 | 2016-10-26 | 罗伯特·博世有限公司 | Apparatus for determining pressure and method of manufacturing the same |
| CN107003159A (en) * | 2014-12-15 | 2017-08-01 | 罗伯特·博世有限公司 | Sensor device, is especially applicable in motor vehicle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1070948A1 (en) * | 1999-07-20 | 2001-01-24 | Endress + Hauser Gmbh + Co. | Relative pressure sensor |
| DE10133066B4 (en) * | 2001-07-07 | 2008-06-19 | Endress + Hauser Gmbh + Co. Kg | pressure gauge |
-
2004
- 2004-09-28 CN CNB2004100120809A patent/CN100443873C/en not_active Expired - Fee Related
-
2006
- 2006-05-11 HK HK06105482.8A patent/HK1085535A1/en unknown
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460101A (en) * | 2009-05-20 | 2012-05-16 | 微型金属薄膜电阻器有限公司 | Pressure sensor |
| CN102460101B (en) * | 2009-05-20 | 2014-11-26 | 微型金属薄膜电阻器有限公司 | Pressure sensor |
| CN102840871B (en) * | 2011-06-23 | 2015-10-21 | 横河电机株式会社 | Sensor unit |
| CN102840871A (en) * | 2011-06-23 | 2012-12-26 | 横河电机株式会社 | Sensor unit |
| CN103688141B (en) * | 2011-07-20 | 2016-05-11 | 罗伯特·博世有限公司 | Especially be used in the sensor device in motor vehicle |
| CN103688141A (en) * | 2011-07-20 | 2014-03-26 | 罗伯特·博世有限公司 | Sensor device, in particular for use in a motor vehicle |
| CN104870963A (en) * | 2012-12-27 | 2015-08-26 | 罗伯特·博世有限公司 | Pressure sensor arrangement and method for mounting a pressure sensor arrangement |
| CN104870963B (en) * | 2012-12-27 | 2017-12-08 | 罗伯特·博世有限公司 | Pressure sensor assembly and the method for assembling pressure sensor cluster |
| CN105960585A (en) * | 2014-03-17 | 2016-09-21 | 恩特葛瑞斯-捷特隆解决方案公司 | Disposable liquid chemical sensor system |
| CN107003159A (en) * | 2014-12-15 | 2017-08-01 | 罗伯特·博世有限公司 | Sensor device, is especially applicable in motor vehicle |
| CN107003159B (en) * | 2014-12-15 | 2020-03-13 | 罗伯特·博世有限公司 | Sensor device for use in a motor vehicle |
| CN106052940A (en) * | 2015-04-10 | 2016-10-26 | 罗伯特·博世有限公司 | Apparatus for determining pressure and method of manufacturing the same |
| CN106052940B (en) * | 2015-04-10 | 2020-11-03 | 罗伯特·博世有限公司 | Device for determining pressure and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1085535A1 (en) | 2006-08-25 |
| CN100443873C (en) | 2008-12-17 |
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Granted publication date: 20081217 |