WO2016203711A1 - Contactless pressure switch - Google Patents

Contactless pressure switch Download PDF

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Publication number
WO2016203711A1
WO2016203711A1 PCT/JP2016/002494 JP2016002494W WO2016203711A1 WO 2016203711 A1 WO2016203711 A1 WO 2016203711A1 JP 2016002494 W JP2016002494 W JP 2016002494W WO 2016203711 A1 WO2016203711 A1 WO 2016203711A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
stopper
permanent magnet
pressure switch
contactless
Prior art date
Application number
PCT/JP2016/002494
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French (fr)
Japanese (ja)
Inventor
義弘 濱邉
宮後　真
Original Assignee
株式会社鷺宮製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社鷺宮製作所 filed Critical 株式会社鷺宮製作所
Priority to JP2017524588A priority Critical patent/JP6560349B2/en
Publication of WO2016203711A1 publication Critical patent/WO2016203711A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm

Definitions

  • the present invention relates to a non-contact pressure switch, and more particularly to a non-contact pressure that converts a change in pressure into a change in magnetic force, and determines the change in pressure by reading the change in magnetic force with a Hall IC or a magnetoresistive element. Regarding switches.
  • a diaphragm type pressure switch that detects the pressure of a working medium is known when controlling systems for air conditioning, air conditioning, automobiles, and industrial equipment.
  • the contact-type pressure switch has a problem in that conduction failure occurs due to foreign matter (insulator) being caught between the contacts.
  • measures such as parts cleaning, assembly in a clean room, and multipoint contact are taken, but it is considered difficult to eliminate the possibility of poor conduction. .
  • a non-contact pressure switch in which a change in magnetic force is discriminated by a Hall IC or a magnetoresistive element.
  • JP 2000-173424 A Japanese Utility Model Publication No.6-19071 Japanese Patent Laid-Open No. 9-7477 JP 2000-322966 A
  • Cited Document 1 a hall element is fixed to a switch case, a magnet is attached to an operating shaft, and a bearing body that slidably supports the operating shaft and the switch case and the operating shaft are liquid-tight.
  • a contactless switch including an O-ring or the like is disclosed, but there is a problem that the cost increases because the number of parts is large and the size is increased.
  • Reference 2 discloses a pressure sensor including a diaphragm that receives the pressure of a fluid to be measured, and a support mechanism that changes a distance between the magnet and the magnetoelectric transducer according to the displacement of the diaphragm. Since it is necessary to provide the support mechanism which is a mechanism, there exists a problem that a number of parts increases and cost becomes high.
  • Cited Document 3 discloses a pressure sensor in which a pressure receiving cylinder or an operating rod is attached to a diaphragm, a permanent magnet is attached to the tip of the diaphragm, and a Hall element is attached to a position facing the permanent magnet. There is a problem that a body or an actuating rod is required, the number of parts is large, and the cost is increased due to the increase in size.
  • a conductive terminal for fixing a switch member having a movable contact is provided in a conductive joint fixed to the body, and the terminal and the joint are connected to each other.
  • a body ground structure is disclosed, which is characterized by providing a conductive disc spring that is always in contact, but no contactless structure is disclosed.
  • an object of the present invention is a non-contact pressure switch that can detect ON-OFF reliably even in a dirty or contaminated environment using magnetism, and has a simple structure with a small number of parts and high accuracy. Is to provide a switch.
  • a contactless pressure switch includes a diaphragm whose shape is displaced according to the pressure of a working medium supplied from a pipe, and an atmospheric pressure side facing the pipe of the diaphragm.
  • a permanent magnet attached to the surface, a stopper provided on the atmospheric pressure side of the diaphragm, and having an accommodating space in which the permanent magnet is accommodated when the diaphragm is displaced, and the atmospheric pressure side surface of the stopper
  • a magnetic detection means for detecting the displacement of the diaphragm by detecting a change in the magnetic force of the permanent magnet that is displaced together with the diaphragm.
  • the permanent magnet is attached to the diaphragm, and the change in the magnetic force of the permanent magnet that is displaced together with the diaphragm is detected by the magnetic detection means fixed to the atmospheric pressure side surface of the stopper.
  • the pressure can be detected accurately with high accuracy and with a simple configuration with few.
  • the permanent magnet may be directly attached to a surface on the atmospheric pressure side facing the pipe line of the diaphragm.
  • the permanent magnet can be magnetized by attaching the permanent magnet directly to the diaphragm, the permanent magnet can be firmly attached to the diaphragm, and it is difficult to come off due to the reversal impact of the diaphragm.
  • the magnetic force detected by the magnetic detection means can be increased.
  • the permanent magnet may be attached to a surface on the atmospheric pressure side facing the pipe line of the diaphragm via a spacer.
  • the magnetic force detected by the magnetic detection means can be adjusted by adjusting the position of the permanent magnet using the spacer.
  • the magnetic detection means may be attached to the surface of the stopper facing the atmospheric pressure side through the spacer.
  • the position of the magnetic detection means can be adjusted, and the magnetic force emitted from the permanent magnet detected by the magnetic detection means can be adjusted without increasing the number of assembly steps more than necessary.
  • a support member that is disposed on the atmospheric pressure side of the stopper and fixes the magnetic detection means may be further provided.
  • the magnetic detection means can be easily fixed by the support member.
  • the support member may have a shape that holds the outer periphery of the stopper and the diaphragm.
  • the stopper and the diaphragm including the diaphragm are held by the support member, so that the number of parts can be reduced and firmly fixed.
  • the support member, the stopper, and the outer periphery of the diaphragm may be fixed with other members.
  • the magnetic detection means may be a Hall IC.
  • a non-contact pressure switch can be configured with a simple configuration with a small number of parts by using a Hall IC that can be miniaturized as a magnetic detection means.
  • the diaphragm may be a metal diaphragm having a spring property that performs a reverse action, that is, a snap action according to the pressure of the working medium.
  • the contactless pressure switch can be reliably detected by using a diaphragm with a large stroke and snap action.
  • the stopper may be a flat type having a flat surface on the atmospheric pressure side.
  • the stopper may be a convex type having a convex curved surface on the atmospheric pressure side.
  • the distance until the diaphragm comes into contact with the stopper can be increased, and the displacement amount of the diaphragm can be increased.
  • accommodation space may be a recess provided on the pipe-side surface of the stopper.
  • accommodation space may be a through hole provided in a central portion of the stopper.
  • the accommodating space may be a concave portion provided on the atmospheric pressure side of the stopper and provided at a position facing the convex shape.
  • Such a configuration stabilizes the positioning of the support member, and as a result, the accommodation position of the magnetic detection means does not vary and the operation value can be stabilized.
  • the magnetic detection means may be arranged immediately above the permanent magnet and configured to perform vertical detection for detecting approach and separation of the permanent magnet in the vertical direction.
  • the strength of the magnetic force detected by the magnetic detection means is large and the detection accuracy can be increased.
  • the magnetic detection means may be arranged laterally in a range in which the permanent magnet is displaced, and configured to perform slide detection for detecting the lateral displacement of the permanent magnet.
  • the working medium passage connected to the conduit to guide the pressure of the working medium, the pressure receiving chamber formed to be enlarged from one end of the working medium passage, the diaphragm, the stopper, and the support member are provided. It may be further provided with a joint pipe having a caulking portion that is fastened and fixed.
  • a contactless pressure switch includes a metal diaphragm whose shape is displaced according to the pressure of a working medium supplied from a pipeline, and a permanent magnet attached to the outer periphery of the diaphragm.
  • a stopper that is provided on the atmospheric pressure side of the diaphragm and has an accommodation space in which the permanent magnet is accommodated when the diaphragm is displaced, and is disposed on the atmospheric pressure side surface of the stopper.
  • a magnetic detection means for detecting displacement of the diaphragm by detecting a change in magnetic force of the diaphragm magnetized by.
  • a small, lightweight, thin permanent magnet is attached to a diaphragm, and a small magnetic detection means such as a Hall IC is fixed by a stopper and a support member, so that the displacement of the permanent magnet is detected by a magnetic detection such as a Hall IC. It can be read by any means, can reliably detect pressure ON-OFF even in dirty or contaminated environments, has a simple configuration with a small number of parts, and can perform pressure detection with high accuracy and high accuracy.
  • a pressure switch can be provided.
  • FIG. 7 is a cross-sectional view showing a convex stopper, which is an alternative shape of the stopper. It is an alternative shape of the storage space of a stopper, Comprising: It is sectional drawing which uses the recessed part provided in the stopper as a storage space.
  • FIG. 6 is a cross-sectional view of an alternative shape of the stopper storage space, in which a through hole provided in the stopper is a storage space.
  • FIG. 7 is a cross-sectional view of an alternative shape of the stopper accommodating space, in which a convex shape is provided on the stopper, and a concave portion provided at a position facing the stopper is used as the accommodating space.
  • FIG. 1 It is a figure which shows the 2nd modification which combined the form shown to FIG. 2B, FIG. 3B, FIG. 4A, and FIG. 5B. It is a figure which shows the 3rd modification which combined the form shown to FIG. 2A, FIG. 3C, FIG. 4B, and FIG. 5A. It is a figure which shows the modification of the non-contact pressure switch shown in FIG. 1, Comprising: It is sectional drawing of the principal part of the modification in which a permanent magnet is attached to a diaphragm via a spacer.
  • It is an alternative method of the attachment method of a permanent magnet Comprising: It is a figure which shows the form with which a permanent magnet is attached to the outer periphery of a diaphragm. It is an alternative method of the attachment method of Hall IC, Comprising: It is a figure which shows the form by which Hall IC is attached to a stopper via a spacer. It is an alternative method of the attachment method of Hall IC, Comprising: It is a figure which shows the form by which Hall IC is attached to a supporting member. It is an alternative method of the attachment method of Hall IC, and is a figure which shows the form by which Hall IC is attached to a circuit board.
  • FIG. 1 is a schematic configuration diagram showing a contactless pressure switch 100 according to an embodiment of the present invention.
  • a contactless pressure switch 100 includes a working medium supply assembly 10 having a conduit 11 for supplying pressure of a working medium for air conditioning, air conditioning, automobiles, and industrial equipment, and an O-ring 12 for sealing the working medium. It is used by being attached to.
  • the contactless pressure switch 100 includes a diaphragm assembly 110, a magnetic detection unit 120, and a fixing unit 130 that holds the diaphragm assembly 110 and the magnetic detection unit 120 and fixes the diaphragm assembly 110 and the magnetic detection unit 120 to the working medium supply assembly 10.
  • the diaphragm assembly 110 includes a cap 111 that seals the working medium supplied from the pipe line 11 together with the O-ring 12, and a working medium supplied from the pipe line 11 provided on the atmospheric pressure side of the cap 111 facing the pipe line 11.
  • the cap 111 has a diameter corresponding to the pipe line 11 and has an opening whose diameter increases toward the side in contact with the diaphragm 112 in accordance with the stroke of the diaphragm 112.
  • the cap 111 is formed of, for example, a metal material by press molding, cutting, die casting, forging, or the like.
  • the diaphragm 112 is made of metal having a spring property that performs a reversal operation, that is, a snap action according to the pressure of the working medium supplied from the pipe 11, but the diaphragm 112 according to a change in the pressure of the working medium. If the shape of 112 is displaced, it is not limited to this.
  • the diaphragm 112 has a shape that swells downward, and when the pressure of the working medium from the pipe line 11 exceeds the set value, this operation is performed. The shape swells downward due to the pressure of the medium, and reversibly reverses from the shape swelled upward.
  • the diaphragm 112 that performs the snap action has a large ON-OFF stroke and is suitable for a pressure switch.
  • the stopper 113 has a concave curved surface 113a on the surface in contact with the diaphragm in order to limit the stroke of the diaphragm 112.
  • the shape of the stopper 113 is not limited to this embodiment as will be described later.
  • the stopper 113 has an accommodation space 113b in which a permanent magnet 121 (described later) attached to the diaphragm 112 is accommodated when the diaphragm 112 is displaced.
  • the accommodation space 113b is a through hole provided in the central portion of the stopper 113, but is not limited to this as will be described later.
  • the stopper 113 is formed of, for example, a metal material by press molding, cutting, die casting, forging, or the like.
  • the diaphragm assembly 110 is not limited to the above-mentioned example,
  • the structure by which the outer periphery of the diaphragm 112 is supported by one support member in which the cap 111 and the stopper 113 are integrally formed may be sufficient.
  • a cap 111 and a stopper 113 as support members that support the outer periphery of the diaphragm 112 may be configured as a part of another device (for example, a joint pipe 801 shown in FIG. 8). .
  • the stopper 113 and the diaphragm 112 may be used alone.
  • the magnetic detection unit 120 includes a permanent magnet 121 that is displaced together with the diaphragm 112, a Hall IC 122 that converts a change in magnetic force caused by the displacement of the permanent magnet 121 into a change in voltage, and a Hall IC 122 that is connected to the Hall IC 122 via a lead wire 124. And a circuit board 123 on which a driving circuit to be driven is mounted.
  • the permanent magnet 121 is directly attached to the diaphragm 112, a small, light, thin, for example, samarium cobalt magnet or the like is used, but the present invention is not limited to this. Any material and fixing method that does not hinder the displacement of the diaphragm and whose magnetic force is displaced along with the displacement of the diaphragm may be used. However, in order not to disturb the displacement of the diaphragm 112, it is desirable to use a small and lightweight permanent magnet 121.
  • the permanent magnet 121 used here is, for example, 1 mm ⁇ 0.8 mm ⁇ 0.5 mm, but is not limited thereto.
  • the diaphragm 112 can be magnetized, the permanent magnet 121 can be firmly attached to the diaphragm 112, and it is difficult to come off even by the reverse impact of the diaphragm 112. Further, by magnetizing the diaphragm 112, the magnetic force detected by the Hall IC 122 can be increased.
  • FIG. 9 shows a modification 900 of the contactless switch in which the permanent magnet 921 is attached to the diaphragm 112 via the spacer 926.
  • the non-contact switch 900 has a permanent magnet 921 attached via a spacer 926, and the other configuration is the same as the non-contact pressure switch 100 shown in FIG.
  • the spacer 926 is a non-magnetic material component used to adjust the position of the permanent magnet 921 in the height direction.
  • the magnetic force applied to the Hall IC 122 can be adjusted by adjusting the position of the permanent magnet 921 using the spacer 926.
  • FIG. 10B described later instead of attaching the spacer 926 to the permanent magnet 921, a spacer 1026 disposed between the Hall IC 122 and the stopper 913 may be provided. The same effect can be obtained by such a configuration.
  • the Hall IC 122 is disposed on the atmospheric pressure side surface of the stopper 113 and is fixed to an IC fixing portion 131e of the support member 131 described later.
  • the Hall IC 122 is disposed not at the position directly above the permanent magnet 121 but at a position shifted from the permanent magnet 121.
  • the fixing method is not limited to the shape of the present embodiment as described later, and the displacement of the diaphragm 112 is not limited. Any method can be used as long as it can detect the displacement of the magnetic force of the permanent magnet 121 that is displaced together.
  • the Hall IC 122 is used here as a magnetic detection device that detects the magnetic force of the permanent magnet 121 that is displaced along with the displacement of the diaphragm 112, the present invention is not limited to this.
  • the thing of 3.0 mm x 1.6 mm x 1.1 mm was used as Hall IC122 of this embodiment, it is not limited to this.
  • the circuit board 123 is arranged in a board accommodating part 131d on the atmospheric pressure side of the support member 131 described later, and is sealed with a sealing material 132.
  • the circuit board 123 is mounted with a drive circuit including a pull-up resistor, a capacitor, and the like to drive the Hall IC 122.
  • a combined drive circuit is mounted.
  • An external connection line 125 including a power supply line, a GND line, and a Vout line connected to the outside is connected to the circuit board 123.
  • the fixing unit 130 fixes the diaphragm assembly 110 and the magnetic detection unit 120 to the working medium supply assembly 10, and seals the support member 131 that fixes the Hall IC 122, the circuit board 123, the lead wire 124, and the external connection line 125.
  • the support member 131 has a substantially disk shape, and is formed of, for example, a resin material.
  • the support member 131 has a protruding portion that pushes and holds the diaphragm assembly 110 and the magnetic detection unit 120 into the concave portion 10 a provided around the pipe line 11 of the working medium supply assembly 10 at the center of the surface on the pipe line 11 side.
  • the circuit board 123 is accommodated in the center of the surface on the atmospheric pressure side 131a, the outer peripheral portion 131b having a screw hole 131c extending around the protrusion 131a and having the fixing screw 134 inserted therein, and in contact with the working medium supply assembly 10.
  • the IC fixing portion 131e is formed on the support member 131 and fixing the Hall IC 122, it is possible to perform pressure detection with high accuracy and high accuracy with a simple configuration with a small number of components.
  • the shape of the support member 131 is not limited to the shape of this embodiment so that it may mention later. For example, it is good also as a shape etc. which attach Hall IC122 directly like the supporting member 1031c shown to FIG. 10C mentioned later.
  • the Hall IC 122, the circuit board 123, the lead wire 124, and the external connection line 125 are provided in the IC fixing part 131e and the board housing part 131d of the support member 131.
  • the sealing material 132 is attached to the substrate housing part 131 d of the support member 131.
  • the support member 131 is disposed in the concave portion 10a of the working medium supply assembly 10 together with the diaphragm assembly 110 to which the permanent magnet 121 is attached, and is attached to the working medium supply assembly 10 by a plurality of fixing screws 134 and a plurality of washers 135. Fixed.
  • the shape of the support member 131 is not limited to the shape of the present embodiment, and the attachment method is not limited to this.
  • the diaphragm 112 that performs the snap action is reversed from the shape that swells toward the conduit 11 to the shape that swells toward the atmospheric pressure.
  • the permanent magnet 121 attached directly to the diaphragm 112 is displaced from the pipe line 11 side to the atmospheric pressure side.
  • the drive circuit mounted on the circuit board 123 receives power supply from the power supply line and the GND line among the external connection lines 125 and drives the Hall IC 122.
  • the Hall IC 122 changes the electromotive force due to the magnetic force due to the change in the magnetic force emitted from the permanent magnet 121 that is displaced from the pipe line 11 side to the atmospheric pressure side, and reads this change as a voltage change. Output to the outside via a line. The displacement amount of the diaphragm 112 is read from the output voltage change of the Vout line, and the non-contact pressure switch 100 operates as a pressure switch.
  • a small, light, thin permanent magnet is attached to the diaphragm, and a small magnetic detection means such as a Hall IC is fixed by a stopper and a support member.
  • the displacement of the permanent magnet can be read by magnetic detection means such as Hall ICs, pressure ON-OFF can be detected reliably even in a dirty or contaminated environment, the number of parts is simple, and the positioning is accurate and accurate.
  • High pressure detection can be performed. That is, the movement of the diaphragm is limited by the stopper, that is, the movement of the permanent magnet in the vertical direction is limited by the stopper and stops at the same position every time, and the Hall IC is installed on the atmospheric pressure side surface of the stopper. Therefore, the positioning can be performed accurately with respect to the vertical direction, whereby the pressure can be detected accurately and accurately with a simple configuration with a small number of parts.
  • FIG. 2A and 2B are diagrams showing alternative shapes of the stopper 113.
  • FIG. 2A and 2B are diagrams showing alternative shapes of the stopper 113.
  • a flat type stopper 210 having a flat surface 210b on the atmospheric pressure side as shown in FIG. 2A may be used, or the side in contact with the diaphragm 112 as shown in FIG. 2B
  • a convex stopper 220 having a convex curved surface 220b on the atmospheric pressure side corresponding to the concave curved surface 220a may be used.
  • the Hall IC 122 can be easily installed, and the positioning accuracy can be easily increased.
  • the convex stopper 220 shown in FIG. 2B is used, the distance until the diaphragm 112 abuts against the stopper 220 can be increased, and the displacement amount of the diaphragm 112 can be increased.
  • FIG. 3A, 3B, and 3C are diagrams showing alternative shapes of the accommodation space 113b of the stopper 113.
  • FIG. 3A, 3B, and 3C are diagrams showing alternative shapes of the accommodation space 113b of the stopper 113.
  • a concave portion provided on the pipe 11 side of the stopper 310 as shown in FIG. 3A can be used as the accommodating space 310a, and the stopper 320 as shown in FIG. Even if the through hole provided in the central portion is used as the accommodation space 320a, a convex shape 330b is provided on the atmospheric pressure side of the stopper 330 as shown in FIG. 3C, and the concave portion provided at the opposite position is used as the accommodation space 330a.
  • Good. 3A and 3B use a permanent magnet 121 'that is smaller and thinner than the permanent magnet 121 shown in FIG. 1, and in FIG.
  • a permanent magnet 121' ' that is taller than the permanent magnet 121'.
  • slide detection shown in FIG. when the accommodation space 310a shown in FIG. 3A is used, foreign matter does not enter the diaphragm 112, and there is no foreign matter inside, so that it is difficult to cause malfunction or the like.
  • the accommodation space 320a shown in FIG. 3B since it penetrates, the internal pressure of the upper portion of the diaphragm 112 is stabilized, and as a result, the transition of the displacement of the diaphragm 112 due to the pressure is stabilized.
  • the accommodation space 330a shown in FIG. 3C when the accommodation space 330a shown in FIG. 3C is used, the positioning of the support member 131 is stabilized. As a result, the accommodation position of the Hall IC 122 does not vary, and the operation value is stabilized.
  • FIG. 4A, 4B, 4C, and 4D are diagrams showing alternative shapes of the support member 131 that supports the Hall IC 122.
  • FIG. 4A, 4B, 4C, and 4D are diagrams showing alternative shapes of the support member 131 that supports the Hall IC 122.
  • a fixing method having a shape in which a portion 113′a is provided and a concave portion 430a is provided on the surface of the support member 430 on the side of the pipe line 11 and positioned is used, the stopper 113 ′′ shown in FIG.
  • a fixing method may be used in which a concave portion 113 ′′ a is provided on the surface and a convex portion 440a is provided on the surface of the support member 440 on the side of the pipe line 11 for positioning.
  • FIG. 5A and FIG. 5B are diagrams showing an alternative method of the detection method of the Hall IC 122.
  • the Hall IC 122 is arranged immediately above the permanent magnet 121 ′ as shown in FIG. Even if vertical detection to be detected is performed, the Hall IC 122 is disposed laterally in the range in which the permanent magnet 121 ′ is displaced, as shown in FIG. 5B, and slide detection is performed to detect the lateral displacement of the permanent magnet 121 ′. Also good.
  • the vertical detection shown in FIG. 5A there is an effect that the strength of the magnetic force to be detected is large and the detection accuracy is high
  • the slide detection shown in FIG. 5B a wide range of detection can be performed. There is an effect that a long stroke can be detected.
  • FIG. 6 is a diagram showing a first modified example 600.
  • the first modification 600 uses a flat type stopper 613 as shown in FIG. 2A, and a concave portion as shown in FIG. 3A is used as an accommodation space 613 a, and a support member 631 as shown in FIG. 4B, Using the fixing method of fixing the outer periphery of the stopper 613 and the diaphragm 112 together with the working medium supply assembly 10 ′ which is another member, the vertical approach and separation of the permanent magnet 121 ′ as shown in FIG. 5A Is combined with vertical detection for detecting the signal by the Hall IC 122.
  • the first modification 600 does not have the cap 111, the diaphragm 112 is supported only by the stopper 613, and the stroke of the diaphragm 112 is limited by the working medium supply assembly 10 ′.
  • FIG. 7 is a diagram showing a second modified example 700.
  • the second modification 700 uses a convex stopper 713 as shown in FIG. 2B, and a through hole as shown in FIG. 3B is used as the accommodation space 713a, and the stopper 713 as shown in FIG. 4A and
  • the support member 731b that holds the outer shape of the diaphragm 112 is used, and the slide detection for detecting the lateral displacement of the permanent magnet 121 ′′ as shown in FIG. 5B is combined.
  • FIG. 8 is a diagram showing a third modified example 800.
  • the third modification 800 uses a flat type stopper 813 as shown in FIG. 2A, and a convex shape 813b is provided on the atmospheric pressure side of the stopper 813 as shown in FIG. 4B is used, and the outer periphery of the support member 831, the stopper 813, and the diaphragm 112 is fixed together with a joint pipe 801 that is another member as shown in FIG. 4B.
  • the permanent magnet 121 ′ has a configuration in which the vertical detection for detecting the approach and separation in the vertical direction by the Hall IC 122 is combined. In FIG.
  • a joint pipe 801 includes a working medium passage 801a communicating with a pipe through which the pressure of the working medium is guided, a pressure receiving chamber 801b formed conically expanding from one end of the working medium passage 801a, and a diaphragm.
  • An assembly 810 and a caulking portion 801c for caulking and fixing the support member 831 are provided.
  • the joint pipe 801 is not limited to the above-described shape, and can be applied to various shapes.
  • the joint pipe 801 is formed of, for example, a metal material by press molding, cutting, die casting, forging, or the like.
  • FIG. 10A is an alternative method of attaching the permanent magnet 121, and shows a form in which the permanent magnet 1021 is attached to the outer periphery of the diaphragm 112.
  • FIG. 10B is an alternative method of attaching the Hall IC 122.
  • FIG. 10C is a view showing a form in which the Hall IC 122 is attached to the stopper 1013b via the spacer 1026
  • FIG. 10C is a view showing a form in which the Hall IC 122 is attached to the support member
  • FIG. 10D is a view in which the Hall IC 1022 is attached to the circuit board 1023. It is a figure which shows the form attached to '.
  • a permanent magnet 1021 may be attached to the outer periphery of the diaphragm 112 instead of the permanent magnet 121 shown in FIG.
  • the Hall IC 122 detects a change in the magnetic force of the diaphragm 112 magnetized by the permanent magnet 1021, thereby detecting the displacement of the diaphragm 112.
  • the permanent magnet 1021 is attached to the outer periphery of the diaphragm 112.
  • the present invention is not limited to this, and any position can be used as long as the diaphragm 112 can be magnetized.
  • the Hall IC 122 is arranged at the center of the stopper 113 on the atmospheric pressure side, but the present invention is not limited to this, and it is only necessary to detect a change in the magnetic force of the diaphragm 112 magnetized by the permanent magnet 1021.
  • a spacer 1026 may be provided between the Hall IC 122 and the stopper 1013b.
  • the position of the Hall IC 122 can be adjusted, and the magnetic force emitted from the permanent magnet 1021 ′ detected by the Hall IC 122 can be adjusted without increasing the number of assembly steps more than necessary.
  • FIG. 10C holes attached to the stoppers 113, 113 ′, 113 ′′, 613, etc., like the support members 410, 420, 430, 440, 631, etc. shown in FIGS. 4A to 4D, FIG.
  • a support member 1031c to which the Hall IC 122 is directly attached may be provided.
  • the support member 1031c formed of an insulating material such as a resin is directly contacted without contacting the stopper 1013c.
  • the Hall IC 1022 may be directly mounted on the circuit board 1023 ′ instead of the configuration in which the Hall IC 122 is attached to the stopper 613 as shown in FIG. 6 and the like.
  • the connection reliability of the Hall IC 1022 is increased and it is not necessary to use the lead wire 124, so that a cost reduction can be expected.
  • a small, lightweight, thin permanent magnet is attached to a diaphragm, and a small magnetic detection means such as a Hall IC is fixed by a stopper and a support member.
  • the displacement of the permanent magnet can be read by magnetic detection means such as Hall ICs, pressure ON-OFF can be detected reliably even in a dirty or contaminated environment, the number of parts is simple, and the positioning is accurate and accurate. High pressure detection can be performed.
  • Non-contact pressure switch 110 610, 710, 810, 910, 1010b, 1010c, 1010d Diaphragm assembly 111, 911, 1011b Cap 112 Diaphragm 113, 113 ′, 113 ′′, 210, 220, 713, 913, 1013b, 1013c, 1013d Stopper 113b, 310a, 320a, 330a Storage space 120, 620, 720, 820 Magnetic detector 121, 121 ′, 121 ′′, 921, 1021, 1021 ′, 1021 ′′ Permanent magnet 122, 1022 Hall IC 123, 623, 723, 823, 1023, 1023 'circuit board 124 lead wire 125 external connection line 130, 630, 730, 830, 1030c, 1030d fixing part 131, 410, 420, 430,

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The purpose of the present invention is to provide a high-precision, contactless pressure switch that uses magnetism, is capable of reliably detecting pressure ON/OFF even in a dirty or contaminated environment, and uses a simple structure having few components. This contactless pressure switch (100) comprises: a diaphragm (112) having a shape that displaces in accordance with the pressure of a working medium supplied from a conduit (11); a permanent magnet (121) attached to a surface on an atmospheric pressure-side being a side facing the conduit (11) for the diaphragm (112); a stopper (113) provided on the atmospheric pressure-side of the diaphragm (112) and having a housing space (113b) in which the permanent magnet (121) is housed if the diaphragm (112) is displaced; and a Hall IC (122) arranged on a surface on the atmospheric pressure-side of the stopper (113) and detecting displacement of the diaphragm (112), by detecting change in the magnetic force of the permanent magnet (121) that displaces together with the diaphragm (112).

Description

無接点圧力スイッチNon-contact pressure switch
　本発明は、無接点圧力スイッチに係り、特に、圧力の変化を磁力の変化に変換し、磁力の変化をホールＩＣ、または、磁気抵抗素子などにより読み取ることにより圧力の変化を判別する無接点圧力スイッチに関する。 The present invention relates to a non-contact pressure switch, and more particularly to a non-contact pressure that converts a change in pressure into a change in magnetic force, and determines the change in pressure by reading the change in magnetic force with a Hall IC or a magnetoresistive element. Regarding switches.
　冷暖房、空調、自動車、及び、産業装置用のシステムの制御に際して、作動媒体の圧力を検出するダイヤフラム式の圧力スイッチが知られている。圧力スイッチのうち、接点式の圧力スイッチでは、接点間に異物（絶縁物）が噛み込むことにより導通不良が発生するという問題がある。この問題の対策のために、部品洗浄、クリーンルーム内の組立、多点接点化などの対策を行っているが、導通不良が発生する可能性を０にすることは困難であると考えられている。 2. Description of the Related Art A diaphragm type pressure switch that detects the pressure of a working medium is known when controlling systems for air conditioning, air conditioning, automobiles, and industrial equipment. Among the pressure switches, the contact-type pressure switch has a problem in that conduction failure occurs due to foreign matter (insulator) being caught between the contacts. To deal with this problem, measures such as parts cleaning, assembly in a clean room, and multipoint contact are taken, but it is considered difficult to eliminate the possibility of poor conduction. .
　このような接点式の圧力スイッチの問題点を解消するために、例えば、磁力の変化をホールＩＣ、または、磁気抵抗素子等により判別する無接点圧力スイッチが知られている。 In order to solve such a problem of the contact-type pressure switch, for example, a non-contact pressure switch is known in which a change in magnetic force is discriminated by a Hall IC or a magnetoresistive element.
特開２０００－１７３４２４号公報JP 2000-173424 A 実公平６－１９０７１号公報Japanese Utility Model Publication No.6-19071 特開平９－７４７７号公報Japanese Patent Laid-Open No. 9-7477 特開２０００－３２２９６６号公報JP 2000-322966 A
　引用文献１には、スイッチケースにホール素子を固定し、作動軸にマグネットを取り付け、さらに、作動軸を摺動可能に軸支する軸受け体と、スイッチケースと作動軸との間を液密するＯリング等を備える無接点スイッチが開示されているが、部品点数が多く大型化するためコストが高くなるという問題がある。 In Cited Document 1, a hall element is fixed to a switch case, a magnet is attached to an operating shaft, and a bearing body that slidably supports the operating shaft and the switch case and the operating shaft are liquid-tight. A contactless switch including an O-ring or the like is disclosed, but there is a problem that the cost increases because the number of parts is large and the size is increased.
　引用文献２には、被測定流体の圧力を受けるダイヤフラムと、このダイヤフラムの変位に従って磁石と、磁電変換素子との間の間隔を変化させる支持機構とを備える圧力センサが開示されているが、可動機構である支持機構を備える必要があるため、部品点数が多くなりコストが高くなるという問題がある。 Reference 2 discloses a pressure sensor including a diaphragm that receives the pressure of a fluid to be measured, and a support mechanism that changes a distance between the magnet and the magnetoelectric transducer according to the displacement of the diaphragm. Since it is necessary to provide the support mechanism which is a mechanism, there exists a problem that a number of parts increases and cost becomes high.
　引用文献３には、ダイヤフラムに受圧筒体あるいは作動ロッドを取り付け、その先端に永久磁石が取り付けられ、永久磁石に対向する位置にホール素子が取り付けられた圧力センサが開示されているが、受圧筒体あるいは作動ロッドを必要としており、部品点数が多く、大型化するためコストが高くなるという問題がある。 Cited Document 3 discloses a pressure sensor in which a pressure receiving cylinder or an operating rod is attached to a diaphragm, a permanent magnet is attached to the tip of the diaphragm, and a Hall element is attached to a position facing the permanent magnet. There is a problem that a body or an actuating rod is required, the number of parts is large, and the cost is increased due to the increase in size.
　引用文献４には、一般的な接点式のダイヤフラム圧力スイッチとして、ボディに固定する導電性のジョイント内に、可動接点を備えたスイッチ部材を固定する導電性のターミナルを設け、当該ターミナルとジョイントを常時接する導電性の皿ばねを設けたことを特徴とするボディアース構造が開示されているが、無接点構造は開示されていない。 In the cited document 4, as a general contact type diaphragm pressure switch, a conductive terminal for fixing a switch member having a movable contact is provided in a conductive joint fixed to the body, and the terminal and the joint are connected to each other. A body ground structure is disclosed, which is characterized by providing a conductive disc spring that is always in contact, but no contactless structure is disclosed.
　従って、本発明の目的は、磁気を利用し、汚れや汚染された環境でも確実にＯＮ－ＯＦＦを検出できる無接点圧力スイッチであって、部品点数が少なくシンプルな構造で精度の高い無接点圧力スイッチを提供することである。 Accordingly, an object of the present invention is a non-contact pressure switch that can detect ON-OFF reliably even in a dirty or contaminated environment using magnetism, and has a simple structure with a small number of parts and high accuracy. Is to provide a switch.
　上記課題を解決するために、本発明の無接点圧力スイッチは、管路から供給される作動媒体の圧力に応じて形状が変位するダイヤフラムと、上記ダイヤフラムの上記管路に対向する大気圧側の面に取り付けられた永久磁石と、上記ダイヤフラムの上記大気圧側に設けられ、上記ダイヤフラムが変位した場合に上記永久磁石が収容される収容空間を有するストッパーと、上記ストッパーの上記大気圧側の面に配置され、上記ダイヤフラムと共に変位する上記永久磁石の磁力の変化を検出することにより、上記ダイヤフラムの変位を検出する磁気検出手段とを備えることを特徴とする。 In order to solve the above problems, a contactless pressure switch according to the present invention includes a diaphragm whose shape is displaced according to the pressure of a working medium supplied from a pipe, and an atmospheric pressure side facing the pipe of the diaphragm. A permanent magnet attached to the surface, a stopper provided on the atmospheric pressure side of the diaphragm, and having an accommodating space in which the permanent magnet is accommodated when the diaphragm is displaced, and the atmospheric pressure side surface of the stopper And a magnetic detection means for detecting the displacement of the diaphragm by detecting a change in the magnetic force of the permanent magnet that is displaced together with the diaphragm.
　このような構成とすることにより、ダイヤフラムに永久磁石を取り付け、ストッパーの大気圧側の面に固定された磁気検出手段により、ダイヤフラムと共に変位する永久磁石の磁力の変化を検出することにより、部品点数が少なくシンプルな構成で、位置決めが正確で精度の高い圧力検出を行うことができる。 By adopting such a configuration, the permanent magnet is attached to the diaphragm, and the change in the magnetic force of the permanent magnet that is displaced together with the diaphragm is detected by the magnetic detection means fixed to the atmospheric pressure side surface of the stopper. The pressure can be detected accurately with high accuracy and with a simple configuration with few.
　また、上記永久磁石は、上記ダイヤフラムの上記管路に対向する大気圧側の面に直接取り付けられるものとしてもよい。 Further, the permanent magnet may be directly attached to a surface on the atmospheric pressure side facing the pipe line of the diaphragm.
　このような構成とすることにより、永久磁石をダイヤフラムに直接取り付けることにより、ダイヤフラムを磁化することができ、永久磁石を強固にダイヤフラムに取り付けることができ、ダイヤフラムの反転衝撃によっても外れにくくなり、また、ダイヤフラムを磁化することにより、磁気検出手段で検出する磁力を強くすることができる。 By adopting such a configuration, the permanent magnet can be magnetized by attaching the permanent magnet directly to the diaphragm, the permanent magnet can be firmly attached to the diaphragm, and it is difficult to come off due to the reversal impact of the diaphragm. By magnetizing the diaphragm, the magnetic force detected by the magnetic detection means can be increased.
　また、上記永久磁石は、上記ダイヤフラムの上記管路に対向する大気圧側の面にスペーサを介して取り付けられるものとしてもよい。 Further, the permanent magnet may be attached to a surface on the atmospheric pressure side facing the pipe line of the diaphragm via a spacer.
　このような構成とすることにより、スペーサを使用して永久磁石の位置を調整することにより磁気検出手段で検出する磁力を調整できる。 With this configuration, the magnetic force detected by the magnetic detection means can be adjusted by adjusting the position of the permanent magnet using the spacer.
　また、上記磁気検出手段は、上記ストッパーの上記管路に対向する大気圧側の面にスペーサを介して取り付けられるものとしてもよい。 The magnetic detection means may be attached to the surface of the stopper facing the atmospheric pressure side through the spacer.
　このような構成とすることにより、磁気検出手段の位置を調整することができ、組み立て工数を必要以上に多くすることなく、磁気検出手段で検出される永久磁石から放出される磁力を調整できる。 With such a configuration, the position of the magnetic detection means can be adjusted, and the magnetic force emitted from the permanent magnet detected by the magnetic detection means can be adjusted without increasing the number of assembly steps more than necessary.
　また、上記ストッパーの上記大気圧側に配置され、上記磁気検出手段を固定する支持部材をさらに備えるものとしてもよい。 Further, a support member that is disposed on the atmospheric pressure side of the stopper and fixes the magnetic detection means may be further provided.
　このような構成とすることにより、磁気検出手段を支持部材により容易に固定することができる。 With such a configuration, the magnetic detection means can be easily fixed by the support member.
　また、上記支持部材は、上記ストッパー、及び、上記ダイヤフラムの外周を保持する形状を有するものとしてもよい。 The support member may have a shape that holds the outer periphery of the stopper and the diaphragm.
　このような構成とすることにより、ストッパー、及び、ダイヤフラムを含めて支持部材で保持することにより、部品点数が少なく強固に固定することができる。 By adopting such a configuration, the stopper and the diaphragm including the diaphragm are held by the support member, so that the number of parts can be reduced and firmly fixed.
　また、上記支持部材、上記ストッパー、及び、上記ダイヤフラムの外周を他の部材で固定するものとしてもよい。 Further, the support member, the stopper, and the outer periphery of the diaphragm may be fixed with other members.
　このような構成とすることにより、ストッパー、及び、ダイヤフラムを含めて他の部材で保持することにより、強固に固定することができる。 By adopting such a configuration, it can be firmly fixed by being held by other members including the stopper and the diaphragm.
　また、上記磁気検出手段は、ホールＩＣであるものとしてもよい。 Further, the magnetic detection means may be a Hall IC.
　このような構成とすることにより、磁気検出手段として小型化が可能なホールＩＣを使用することにより部品点数が少なくシンプルな構成で無接点圧力スイッチを構成できる。 By adopting such a configuration, a non-contact pressure switch can be configured with a simple configuration with a small number of parts by using a Hall IC that can be miniaturized as a magnetic detection means.
　また、上記ダイヤフラムは、上記作動媒体の圧力に応じて反転動作、すなわち、スナップアクションするばね性を有する金属製のダイヤフラムであるものとしてもよい。 Further, the diaphragm may be a metal diaphragm having a spring property that performs a reverse action, that is, a snap action according to the pressure of the working medium.
　このような構成とすることにより、ストロークの大きい、スナップアクションするダイヤフラムを使用することにより、無接点圧力スイッチの検出を確実に行うことができる。 With this configuration, the contactless pressure switch can be reliably detected by using a diaphragm with a large stroke and snap action.
　また、上記ストッパーは、大気圧側の面が平坦のフラットタイプであるものとしてもよい。 The stopper may be a flat type having a flat surface on the atmospheric pressure side.
　このような構成とすることにより、磁気検出手段を設置しやすくなり、位置出し精度を高くすることができる。 By adopting such a configuration, it is easy to install the magnetic detection means, and the positioning accuracy can be increased.
　また、上記ストッパーは、大気圧側の面が凸曲面の凸タイプであるものとしてもよい。 Further, the stopper may be a convex type having a convex curved surface on the atmospheric pressure side.
　このような構成とすることにより、ダイヤフラムがストッパーに当接するまでの距離を長く取ることができ、ダイヤフラムの変位量を大きくすることができる。 By adopting such a configuration, the distance until the diaphragm comes into contact with the stopper can be increased, and the displacement amount of the diaphragm can be increased.
　また、上記収容空間は、上記ストッパーの上記管路側の面に設けられた凹部であるものとしてもよい。 Further, the accommodation space may be a recess provided on the pipe-side surface of the stopper.
　このような構成とすることにより、ダイヤフラムに異物が入らなくなり、異物が内部にないため、作動不良等を起こしにくくできる。 By adopting such a configuration, foreign matter does not enter the diaphragm, and there is no foreign matter inside, so that it is difficult to cause malfunction or the like.
　また、上記収容空間は、上記ストッパーの中央部に設けられた貫通孔であるものとしてもよい。 Further, the accommodation space may be a through hole provided in a central portion of the stopper.
　このような構成とすることにより、ダイヤフラムの上部の内圧が安定し、結果として圧力によるダイヤフラムの変位の推移を安定させることができる。 With such a configuration, the internal pressure of the upper part of the diaphragm is stabilized, and as a result, the transition of the displacement of the diaphragm due to the pressure can be stabilized.
　また、上記収容空間は、上記ストッパーの大気圧側に凸形状を設け、その対向する位置に設けられた凹部であるものとしてもよい。 Further, the accommodating space may be a concave portion provided on the atmospheric pressure side of the stopper and provided at a position facing the convex shape.
　このような構成とすることにより、支持部材の位置出しが安定するので、結果として磁気検出手段の収容位置がばらつかず、作動値を安定させることができる。 Such a configuration stabilizes the positioning of the support member, and as a result, the accommodation position of the magnetic detection means does not vary and the operation value can be stabilized.
　また、上記磁気検出手段は、上記永久磁石の直上に配置され、上記永久磁石の鉛直方向の接近と離脱を検出する鉛直検知を行うように構成されるものとしてもよい。 Further, the magnetic detection means may be arranged immediately above the permanent magnet and configured to perform vertical detection for detecting approach and separation of the permanent magnet in the vertical direction.
　このような構成とすることにより、磁気検出手段で検出する磁力の強弱が大きく検出精度を高くできる。 By adopting such a configuration, the strength of the magnetic force detected by the magnetic detection means is large and the detection accuracy can be increased.
　また、上記磁気検出手段は、上記永久磁石の変位する範囲に横向きに配置され、上記永久磁石の横方向の変位を検出するスライド検知を行うように構成されるものとしてもよい。 Further, the magnetic detection means may be arranged laterally in a range in which the permanent magnet is displaced, and configured to perform slide detection for detecting the lateral displacement of the permanent magnet.
　このような構成とすることにより、磁気検出手段で広い範囲の検出を行うことができ、長いストロークの検出を行うことができる。 With such a configuration, a wide range of detection can be performed by the magnetic detection means, and a long stroke can be detected.
　また、上記管路と接続され作動媒体の圧力が導かれる作動媒体通路と、上記作動媒体通路の一端から拡大して形成される受圧室と、上記ダイヤフラム、上記ストッパー、及び、上記支持部材をかしめて固定するかしめ部とを有する継手管をさらに備えるものとしてよい。 In addition, the working medium passage connected to the conduit to guide the pressure of the working medium, the pressure receiving chamber formed to be enlarged from one end of the working medium passage, the diaphragm, the stopper, and the support member are provided. It may be further provided with a joint pipe having a caulking portion that is fastened and fixed.
　このような構成とすることにより、継手管のかしめ部でダイヤフラム、ストッパー、及び、支持部材をかしめて固定することにより、作動媒体通路を介して継手管の受圧室に導かれた作動媒体の圧力を効率よくダイヤフラムで検出することができる。 With this configuration, the pressure of the working medium guided to the pressure receiving chamber of the joint pipe through the working medium passage by caulking and fixing the diaphragm, stopper, and support member at the caulking portion of the joint pipe. Can be efficiently detected by the diaphragm.
　上記課題を解決するために、本発明の無接点圧力スイッチは、管路から供給される作動媒体の圧力に応じて形状が変位する金属製のダイヤフラムと、上記ダイヤフラムの外周に取り付けられた永久磁石と、上記ダイヤフラムの上記大気圧側に設けられ、上記ダイヤフラムが変位した場合に上記永久磁石が収容される収容空間を有するストッパーと、上記ストッパーの上記大気圧側の面に配置され、上記永久磁石により磁化された上記ダイヤフラムの磁力の変化を検出することにより、上記ダイヤフラムの変位を検出する磁気検出手段とを備えることを特徴とする。 In order to solve the above problems, a contactless pressure switch according to the present invention includes a metal diaphragm whose shape is displaced according to the pressure of a working medium supplied from a pipeline, and a permanent magnet attached to the outer periphery of the diaphragm. A stopper that is provided on the atmospheric pressure side of the diaphragm and has an accommodation space in which the permanent magnet is accommodated when the diaphragm is displaced, and is disposed on the atmospheric pressure side surface of the stopper. And a magnetic detection means for detecting displacement of the diaphragm by detecting a change in magnetic force of the diaphragm magnetized by.
　このような構成とすることにより、反転動作の変動が少ないダイヤフラムの外周に永久磁石を取り付けることにより、永久磁石が外れにくくでき、さらに、ダイヤフラムを永久磁石により磁化することにより、永久磁石の取り付けを強固にすることができ、かつ、磁気検出手段で検出する磁力を強くすることができる。 By adopting such a configuration, it is possible to make it difficult for the permanent magnet to come off by attaching a permanent magnet to the outer periphery of the diaphragm with little fluctuation in reversing operation, and furthermore, by attaching the permanent magnet by magnetizing the diaphragm with the permanent magnet The magnetic force detected by the magnetic detection means can be increased.
　本発明によれば、小型、軽量、薄型の永久磁石をダイヤフラムに取りつけ、ホールＩＣ等の小型の磁気検出手段をストッパー及び支持部材により固定することにより、永久磁石の変位をホールＩＣ等の磁気検出手段で読み取ることができ、汚れや汚染された環境でも確実に圧力のＯＮ－ＯＦＦを検出でき、部品点数が少なくシンプルな構成で、位置決めが正確で精度の高い圧力検出を行うことができる無接点圧力スイッチを提供できる。 According to the present invention, a small, lightweight, thin permanent magnet is attached to a diaphragm, and a small magnetic detection means such as a Hall IC is fixed by a stopper and a support member, so that the displacement of the permanent magnet is detected by a magnetic detection such as a Hall IC. It can be read by any means, can reliably detect pressure ON-OFF even in dirty or contaminated environments, has a simple configuration with a small number of parts, and can perform pressure detection with high accuracy and high accuracy. A pressure switch can be provided.
本発明の一実施形態に係る無接点圧力スイッチを示す概略構成図である。It is a schematic block diagram which shows the non-contact pressure switch which concerns on one Embodiment of this invention. ストッパーの代替形状であって、フラットタイプのストッパーを示す断面図である。It is a sectional view showing a flat type stopper, which is an alternative shape of the stopper. ストッパーの代替形状であって、凸タイプのストッパーを示す断面図である。FIG. 7 is a cross-sectional view showing a convex stopper, which is an alternative shape of the stopper. ストッパーの収容空間の代替形状であって、ストッパーに設けられた凹部を収容空間とする断面図である。It is an alternative shape of the storage space of a stopper, Comprising: It is sectional drawing which uses the recessed part provided in the stopper as a storage space. ストッパーの収容空間の代替形状であって、ストッパーに設けられた貫通孔を収容空間とする断面図である。FIG. 6 is a cross-sectional view of an alternative shape of the stopper storage space, in which a through hole provided in the stopper is a storage space. ストッパーの収容空間の代替形状であって、ストッパーに凸形状を設け、その対向する位置に設けられた凹部を収容空間とする断面図である。FIG. 7 is a cross-sectional view of an alternative shape of the stopper accommodating space, in which a convex shape is provided on the stopper, and a concave portion provided at a position facing the stopper is used as the accommodating space. ホールＩＣを支持する支持部材の代替形状であって、ストッパー及びダイヤフラムの外周を保持する形状の支持部材を示す図である。It is a figure which shows the support member of the shape which is an alternative shape of the support member which supports Hall IC, and hold | maintains the outer periphery of a stopper and a diaphragm. ホールＩＣを支持する支持部材の代替形状であって、支持部材、ストッパー、及び、ダイヤフラムの外周を併せて他の部材で固定する固定方法を示す図である。It is an alternative shape of the supporting member that supports the Hall IC, and is a view showing a fixing method in which the outer periphery of the supporting member, the stopper, and the diaphragm is fixed together with another member. ホールＩＣを支持する支持部材の代替形状であって、ストッパーに凸部を設け、支持部材に凹部を設けて位置決めする形状の固定方法を示す図である。It is an alternative shape of the support member that supports the Hall IC, and is a diagram illustrating a fixing method of a shape in which a convex portion is provided on the stopper and a concave portion is provided on the support member for positioning. ホールＩＣを支持する支持部材の代替形状であって、ストッパーに凹部を設け、支持部材に凸部を設けて位置決めする形状の固定方法を示す図である。It is an alternative shape of the supporting member that supports the Hall IC, and shows a fixing method of a shape in which a concave portion is provided in the stopper and a convex portion is provided in the supporting member for positioning. ホールＩＣの検知方法の代替方法であって、鉛直検知を示す図である。It is an alternative method of the Hall IC detection method, and is a diagram showing vertical detection. ホールＩＣの検知方法の代替方法であって、スライド検知を示す図である。It is a substitute method of the detection method of Hall IC, Comprising: It is a figure which shows a slide detection. 図２Ａ、図３Ａ、図４Ｂ、図５Ａに示す形態を組み合わせた第１の変形例を示す図である。It is a figure which shows the 1st modification which combined the form shown to FIG. 2A, FIG. 3A, FIG. 4B, and FIG. 5A. 図２Ｂ、図３Ｂ、図４Ａ、図５Ｂに示す形態を組み合わせた第２の変形例を示す図である。It is a figure which shows the 2nd modification which combined the form shown to FIG. 2B, FIG. 3B, FIG. 4A, and FIG. 5B. 図２Ａ、図３Ｃ、図４Ｂ、図５Ａに示す形態を組み合わせた第３の変形例を示す図である。It is a figure which shows the 3rd modification which combined the form shown to FIG. 2A, FIG. 3C, FIG. 4B, and FIG. 5A. 図１に示す無接点圧力スイッチの変形例を示す図であって、永久磁石がスペーサを介してダイヤフラムに取り付けられる変形例の要部の断面図である。It is a figure which shows the modification of the non-contact pressure switch shown in FIG. 1, Comprising: It is sectional drawing of the principal part of the modification in which a permanent magnet is attached to a diaphragm via a spacer. 永久磁石の取り付け方法の代替方法であって、永久磁石がダイヤフラムの外周に取り付けられる形態を示す図である。It is an alternative method of the attachment method of a permanent magnet, Comprising: It is a figure which shows the form with which a permanent magnet is attached to the outer periphery of a diaphragm. ホールＩＣの取り付け方法の代替方法であって、ホールＩＣがスペーサを介してストッパーに取り付けられる形態を示す図である。It is an alternative method of the attachment method of Hall IC, Comprising: It is a figure which shows the form by which Hall IC is attached to a stopper via a spacer. ホールＩＣの取り付け方法の代替方法であって、ホールＩＣが支持部材に取り付けられる形態を示す図である。It is an alternative method of the attachment method of Hall IC, Comprising: It is a figure which shows the form by which Hall IC is attached to a supporting member. ホールＩＣの取り付け方法の代替方法であって、ホールＩＣが回路基板に取り付けられる形態を示す図である。It is an alternative method of the attachment method of Hall IC, and is a figure which shows the form by which Hall IC is attached to a circuit board.
　以下、本発明の実施形態を、図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１は、本発明の一実施形態に係る無接点圧力スイッチ１００を示す概略構成図である。 FIG. 1 is a schematic configuration diagram showing a contactless pressure switch 100 according to an embodiment of the present invention.
　図１において、無接点圧力スイッチ１００は、冷暖房、空調、自動車、及び、産業装置用の作動媒体の圧力を供給する管路１１と、作動媒体をシールするＯリング１２を有する作動媒体供給アセンブリ１０に取り付けられて使用されるものである。無接点圧力スイッチ１００は、ダイヤフラムアセンブリ１１０と、磁気検出部１２０と、ダイヤフラムアセンブリ１１０及び磁気検出部１２０を保持し、作動媒体供給アセンブリ１０に固定する固定部１３０とを備える。 In FIG. 1, a contactless pressure switch 100 includes a working medium supply assembly 10 having a conduit 11 for supplying pressure of a working medium for air conditioning, air conditioning, automobiles, and industrial equipment, and an O-ring 12 for sealing the working medium. It is used by being attached to. The contactless pressure switch 100 includes a diaphragm assembly 110, a magnetic detection unit 120, and a fixing unit 130 that holds the diaphragm assembly 110 and the magnetic detection unit 120 and fixes the diaphragm assembly 110 and the magnetic detection unit 120 to the working medium supply assembly 10.
　ダイヤフラムアセンブリ１１０は、管路１１から供給された作動媒体をＯリング１２と共にシールするキャップ１１１と、キャップ１１１の管路１１に対向する大気圧側に設けられ管路１１から供給された作動媒体の圧力の変化に従い変位するダイヤフラム１１２と、ダイヤフラム１１２の大気圧側に設けられ、キャップ１１１と共にダイヤフラム１１２を狭持し、ダイヤフラム１１２の周囲を溶接等により固定するストッパー１１３とを備える。 The diaphragm assembly 110 includes a cap 111 that seals the working medium supplied from the pipe line 11 together with the O-ring 12, and a working medium supplied from the pipe line 11 provided on the atmospheric pressure side of the cap 111 facing the pipe line 11. A diaphragm 112 that displaces according to a change in pressure, and a stopper 113 that is provided on the atmospheric pressure side of the diaphragm 112, holds the diaphragm 112 together with the cap 111, and fixes the periphery of the diaphragm 112 by welding or the like.
　キャップ１１１は、管路１１に対応した径を有し、ダイヤフラム１１２のストロークに合わせてダイヤフラム１１２に接する側に向い径が広くなる開口を有する。キャップ１１１は、プレス成形、切削加工、ダイキャスト、鍛造等により、例えば、金属材料で成形される。 The cap 111 has a diameter corresponding to the pipe line 11 and has an opening whose diameter increases toward the side in contact with the diaphragm 112 in accordance with the stroke of the diaphragm 112. The cap 111 is formed of, for example, a metal material by press molding, cutting, die casting, forging, or the like.
　ダイヤフラム１１２は、ここでは、管路１１から供給された作動媒体の圧力に応じて反転動作、すなわち、スナップアクションするばね性を有する金属製のものを使用するが、作動媒体の圧力の変化に従いダイヤフラム１１２の形状が変位するものであれば、これには限定されない。ダイヤフラム１１２は、管路１１からの作動媒体の圧力が設定値未満である場合には、下側に膨らんだ形状をなし、管路１１からの作動媒体の圧力が設定値以上になると、この作動媒体の圧力により下側に膨らんだ形状から上側に膨らんだ形状に可逆的に反転する。このように、スナップアクションするダイヤフラム１１２は、ＯＮ―ＯＦＦのストロークが大きく、圧力スイッチに適している。 Here, the diaphragm 112 is made of metal having a spring property that performs a reversal operation, that is, a snap action according to the pressure of the working medium supplied from the pipe 11, but the diaphragm 112 according to a change in the pressure of the working medium. If the shape of 112 is displaced, it is not limited to this. When the pressure of the working medium from the pipe line 11 is less than the set value, the diaphragm 112 has a shape that swells downward, and when the pressure of the working medium from the pipe line 11 exceeds the set value, this operation is performed. The shape swells downward due to the pressure of the medium, and reversibly reverses from the shape swelled upward. Thus, the diaphragm 112 that performs the snap action has a large ON-OFF stroke and is suitable for a pressure switch.
　ストッパー１１３は、ダイヤフラム１１２のストロークを制限するために、ダイヤフラムに接する面に、凹曲面１１３ａを有する。なお、ストッパー１１３の形状は、後述するように、本実施形態には限定されない。ストッパー１１３は、ダイヤフラム１１２が変位した場合にダイヤフラム１１２に取り付けられた後述する永久磁石１２１が収容される収容空間１１３ｂを有する。なお、収容空間１１３ｂは、ストッパー１１３の中央部に設けられた貫通孔としたが、後述するようにこれには限定されない。収容空間１１３ｂを設けることにより、ダイヤフラム１１２と共に変位する永久磁石１２１を少ない部品点数で収容することができ、また、後述するホールＩＣ１２２との位置関係も正確に設定できるため、精度の良い圧力検出が行える。ストッパー１１３は、プレス成形、切削加工、ダイキャスト、鍛造等により、例えば、金属材料で成形される。 The stopper 113 has a concave curved surface 113a on the surface in contact with the diaphragm in order to limit the stroke of the diaphragm 112. The shape of the stopper 113 is not limited to this embodiment as will be described later. The stopper 113 has an accommodation space 113b in which a permanent magnet 121 (described later) attached to the diaphragm 112 is accommodated when the diaphragm 112 is displaced. The accommodation space 113b is a through hole provided in the central portion of the stopper 113, but is not limited to this as will be described later. By providing the accommodating space 113b, the permanent magnet 121 that is displaced together with the diaphragm 112 can be accommodated with a small number of parts, and the positional relationship with the Hall IC 122, which will be described later, can be set accurately, so that accurate pressure detection is possible. Yes. The stopper 113 is formed of, for example, a metal material by press molding, cutting, die casting, forging, or the like.
　なお、ダイヤフラムアセンブリ１１０は、上述の例に限定されず、例えば、キャップ１１１およびストッパー１１３が一体に形成される一つの支持部材にダイヤフラム１１２の外周が支持される構成であってもよい。また、ダイヤフラムアセンブリ１１０は、例えば、ダイヤフラム１１２の外周を支持する支持部材としてのキャップ１１１およびストッパー１１３が、他の装置の一部（例えば、図８に示す継手管８０１）として構成されてもよい。また、ストッパー１１３とダイヤフラム１１２のみで構成されてもよい。 In addition, the diaphragm assembly 110 is not limited to the above-mentioned example, For example, the structure by which the outer periphery of the diaphragm 112 is supported by one support member in which the cap 111 and the stopper 113 are integrally formed may be sufficient. In the diaphragm assembly 110, for example, a cap 111 and a stopper 113 as support members that support the outer periphery of the diaphragm 112 may be configured as a part of another device (for example, a joint pipe 801 shown in FIG. 8). . Alternatively, the stopper 113 and the diaphragm 112 may be used alone.
　磁気検出部１２０は、ダイヤフラム１１２と共に変位する永久磁石１２１と、永久磁石１２１の変位による磁力の変化を電圧の変化に変換するホールＩＣ１２２と、ホールＩＣ１２２にリード線１２４を介して接続されホールＩＣ１２２を駆動する駆動回路が実装される回路基板１２３とを備える。 The magnetic detection unit 120 includes a permanent magnet 121 that is displaced together with the diaphragm 112, a Hall IC 122 that converts a change in magnetic force caused by the displacement of the permanent magnet 121 into a change in voltage, and a Hall IC 122 that is connected to the Hall IC 122 via a lead wire 124. And a circuit board 123 on which a driving circuit to be driven is mounted.
　永久磁石１２１は、ここでは、ダイヤフラム１１２に直接取り付けられることとしたため、小型、軽量、薄型の、例えばサマリウムコバルト磁石等を使用したが、これには限定されない。ダイヤフラムの変位を妨げず、ダイヤフラムの変位と共に磁力が変位する材料及び固定方法であればよく、直接取り付けなくてもよい。但し、ダイヤフラム１１２の変位を妨げないため、永久磁石１２１は、小型、軽量のものを使用することが望ましい。例えば、ここでは、永久磁石１２１として、例えば１ｍｍ×０．８ｍｍ×０．５ｍｍのものを使用したが、これには限定されない。なお、永久磁石１２１をダイヤフラム１１２に直接取り付けることにより、ダイヤフラム１１２を磁化させることができ、永久磁石１２１を強固にダイヤフラム１１２に取り付けることができ、ダイヤフラム１１２の反転衝撃によっても外れにくくできる。また、ダイヤフラム１１２を磁化させることにより、ホールＩＣ１２２で検出する磁力を強くすることができる。 Here, since the permanent magnet 121 is directly attached to the diaphragm 112, a small, light, thin, for example, samarium cobalt magnet or the like is used, but the present invention is not limited to this. Any material and fixing method that does not hinder the displacement of the diaphragm and whose magnetic force is displaced along with the displacement of the diaphragm may be used. However, in order not to disturb the displacement of the diaphragm 112, it is desirable to use a small and lightweight permanent magnet 121. For example, the permanent magnet 121 used here is, for example, 1 mm × 0.8 mm × 0.5 mm, but is not limited thereto. In addition, by directly attaching the permanent magnet 121 to the diaphragm 112, the diaphragm 112 can be magnetized, the permanent magnet 121 can be firmly attached to the diaphragm 112, and it is difficult to come off even by the reverse impact of the diaphragm 112. Further, by magnetizing the diaphragm 112, the magnetic force detected by the Hall IC 122 can be increased.
　ここで、図９に、永久磁石９２１がスペーサ９２６を介してダイヤフラム１１２に取り付けられる無接点スイッチの変形例９００を示す。無接点スイッチ９００は、永久磁石９２１がスペーサ９２６を介して取り付けられており、それ以外の構成は、図１に示す無接点圧力スイッチ１００と同じである。スペーサ９２６は、永久磁石９２１の高さ方向の位置の調整に使用される非磁性体材料の部品である。このように、スペーサ９２６を使用して永久磁石９２１の位置を調整することによりホールＩＣ１２２にかかる磁力を調整できる。なお、後述する図１０Ｂに示すように、永久磁石９２１にスペーサ９２６を取り付ける代わりに、ホールＩＣ１２２とストッパー９１３の間に配置されるスペーサ１０２６を設けるものとしてもよい。このような構成によっても、同様の効果が得られる。 Here, FIG. 9 shows a modification 900 of the contactless switch in which the permanent magnet 921 is attached to the diaphragm 112 via the spacer 926. The non-contact switch 900 has a permanent magnet 921 attached via a spacer 926, and the other configuration is the same as the non-contact pressure switch 100 shown in FIG. The spacer 926 is a non-magnetic material component used to adjust the position of the permanent magnet 921 in the height direction. As described above, the magnetic force applied to the Hall IC 122 can be adjusted by adjusting the position of the permanent magnet 921 using the spacer 926. As shown in FIG. 10B described later, instead of attaching the spacer 926 to the permanent magnet 921, a spacer 1026 disposed between the Hall IC 122 and the stopper 913 may be provided. The same effect can be obtained by such a configuration.
　ホールＩＣ１２２は、ストッパー１１３の大気圧側の面に配置され、後述する支持部材１３１のＩＣ固定部１３１ｅに固定される。ホールＩＣ１２２は、ここでは、永久磁石１２１の直上ではなく、永久磁石１２１とずれた位置に配置されるが、固定方法は、後述するように本実施形態の形状に限定されず、ダイヤフラム１１２の変位と共に変位する永久磁石１２１の磁力の変位を検出できる方法であればよい。また、ここではダイヤフラム１１２の変位と共に変位する永久磁石１２１の磁力を検出する磁気検出装置として、ホールＩＣ１２２を使用したが、これには限定されない。例えば、磁気抵抗効果素子、磁気インピーダンス素子などを使用することも可能である。なお、本実施形態のホールＩＣ１２２として、３．０ｍｍ×１．６ｍｍ×１．１ｍｍのものを使用したが、これには限定されない。 The Hall IC 122 is disposed on the atmospheric pressure side surface of the stopper 113 and is fixed to an IC fixing portion 131e of the support member 131 described later. Here, the Hall IC 122 is disposed not at the position directly above the permanent magnet 121 but at a position shifted from the permanent magnet 121. However, the fixing method is not limited to the shape of the present embodiment as described later, and the displacement of the diaphragm 112 is not limited. Any method can be used as long as it can detect the displacement of the magnetic force of the permanent magnet 121 that is displaced together. Although the Hall IC 122 is used here as a magnetic detection device that detects the magnetic force of the permanent magnet 121 that is displaced along with the displacement of the diaphragm 112, the present invention is not limited to this. For example, it is possible to use a magnetoresistive effect element, a magnetoimpedance element, or the like. In addition, although the thing of 3.0 mm x 1.6 mm x 1.1 mm was used as Hall IC122 of this embodiment, it is not limited to this.
　回路基板１２３は、後述する支持部材１３１の大気圧側の基板収容部１３１ｄに配置され、封止材１３２により封止される。回路基板１２３は、ここではホールＩＣ１２２を駆動するために、プルアップ抵抗、コンデンサ等を含む駆動回路が実装されるが、ホールＩＣ１２２の代わりに他の磁気検出装置が使用された場合には、それに合わせた駆動回路が実装される。回路基板１２３には、外部に接続される電源線、ＧＮＤ線、Ｖｏｕｔ線を含む外部接続線１２５が接続される。 The circuit board 123 is arranged in a board accommodating part 131d on the atmospheric pressure side of the support member 131 described later, and is sealed with a sealing material 132. Here, the circuit board 123 is mounted with a drive circuit including a pull-up resistor, a capacitor, and the like to drive the Hall IC 122. However, when another magnetic detection device is used instead of the Hall IC 122, A combined drive circuit is mounted. An external connection line 125 including a power supply line, a GND line, and a Vout line connected to the outside is connected to the circuit board 123.
　固定部１３０は、ダイヤフラムアセンブリ１１０及び磁気検出部１２０を作動媒体供給アセンブリ１０に固定すると共に、ホールＩＣ１２２を固定する支持部材１３１と、回路基板１２３、リード線１２４、外部接続線１２５を封止する封止材１３２と、ストッパー１１３と支持部材１３１の間に挟まれ、大気圧側をシールするＯリング１３３と、支持部材１３１と作動媒体供給アセンブリ１０とを固定する複数の固定ネジ１３４と、複数の固定ネジ１３４のそれぞれの緩みを防止する複数のワッシャー１３５とを備える。 The fixing unit 130 fixes the diaphragm assembly 110 and the magnetic detection unit 120 to the working medium supply assembly 10, and seals the support member 131 that fixes the Hall IC 122, the circuit board 123, the lead wire 124, and the external connection line 125. A sealing material 132; an O-ring 133 that is sandwiched between the stopper 113 and the support member 131 and seals the atmospheric pressure side; a plurality of fixing screws 134 that fix the support member 131 and the working medium supply assembly 10; And a plurality of washers 135 for preventing each of the fixing screws 134 from loosening.
　支持部材１３１は、略円板形状で、例えば樹脂材料で成形される。支持部材１３１には、管路１１側の面の中央に、作動媒体供給アセンブリ１０の管路１１の周囲に設けられた凹部１０ａに、ダイヤフラムアセンブリ１１０及び磁気検出部１２０を押し込んで保持する突出部１３１ａと、突出部１３１ａの周囲に広がり固定ネジ１３４が挿入されるネジ穴１３１ｃを有し作動媒体供給アセンブリ１０と接触する外周部１３１ｂと、大気圧側の面の中央に、回路基板１２３を収容する基板収容部１３１ｄと、突出部１３１ａの一部から基板収容部１３１ｄに通じる貫通孔であってホールＩＣ１２２を固定するＩＣ固定部１３１ｅが形成される。支持部材１３１にＩＣ固定部１３１ｅを形成し、ホールＩＣ１２２を固定することにより、部品点数が少なくシンプルな構成で、位置決めが正確で精度の高い圧力検出を行うことができる。なお、支持部材１３１の形状は、後述するように本実施形態の形状に限定されない。例えば、後述する図１０Ｃに示す支持部材１０３１ｃのように、ホールＩＣ１２２を直接取り付ける形状などとしてもよい。 The support member 131 has a substantially disk shape, and is formed of, for example, a resin material. The support member 131 has a protruding portion that pushes and holds the diaphragm assembly 110 and the magnetic detection unit 120 into the concave portion 10 a provided around the pipe line 11 of the working medium supply assembly 10 at the center of the surface on the pipe line 11 side. The circuit board 123 is accommodated in the center of the surface on the atmospheric pressure side 131a, the outer peripheral portion 131b having a screw hole 131c extending around the protrusion 131a and having the fixing screw 134 inserted therein, and in contact with the working medium supply assembly 10. An IC fixing portion 131e that fixes the Hall IC 122, which is a through hole extending from a part of the protruding portion 131a to the substrate receiving portion 131d, is formed. By forming the IC fixing portion 131e on the support member 131 and fixing the Hall IC 122, it is possible to perform pressure detection with high accuracy and high accuracy with a simple configuration with a small number of components. In addition, the shape of the support member 131 is not limited to the shape of this embodiment so that it may mention later. For example, it is good also as a shape etc. which attach Hall IC122 directly like the supporting member 1031c shown to FIG. 10C mentioned later.
　本発明の無接点圧力スイッチ１００の取り付け方法の一例として、先ず、支持部材１３１のＩＣ固定部１３１ｅ及び基板収容部１３１ｄに、ホールＩＣ１２２、回路基板１２３、リード線１２４、及び、外部接続線１２５が取り付けられ、その後、支持部材１３１の基板収容部１３１ｄに封止材１３２が取り付けられる。支持部材１３１は、この状態で、永久磁石１２１が取り付けられたダイヤフラムアセンブリ１１０と共に、作動媒体供給アセンブリ１０の凹部１０ａに配置され、複数の固定ネジ１３４及び複数のワッシャー１３５により作動媒体供給アセンブリ１０に固定される。なお、支持部材１３１の形状は、後述するように、本実施形態の形状に限定するものではなく、取り付け方法もこれには限定されない。 As an example of the attachment method of the contactless pressure switch 100 of the present invention, first, the Hall IC 122, the circuit board 123, the lead wire 124, and the external connection line 125 are provided in the IC fixing part 131e and the board housing part 131d of the support member 131. After that, the sealing material 132 is attached to the substrate housing part 131 d of the support member 131. In this state, the support member 131 is disposed in the concave portion 10a of the working medium supply assembly 10 together with the diaphragm assembly 110 to which the permanent magnet 121 is attached, and is attached to the working medium supply assembly 10 by a plurality of fixing screws 134 and a plurality of washers 135. Fixed. As will be described later, the shape of the support member 131 is not limited to the shape of the present embodiment, and the attachment method is not limited to this.
　次に、本発明の無接点圧力スイッチ１００の作用について説明する。作動媒体供給アセンブリ１０から供給された作動媒体の圧力が設定値を超えると、スナップアクションするダイヤフラム１１２が管路１１側に膨らんだ形状から大気圧側に膨らんだ形状に反転する。これに伴い、ダイヤフラム１１２に直接取り付けられた永久磁石１２１が管路１１側から大気圧側に変位する。回路基板１２３に実装された駆動回路は、外部接続線１２５のうち、電源線、及び、ＧＮＤ線から電源供給を受け、ホールＩＣ１２２を駆動する。ホールＩＣ１２２は、管路１１側から大気圧側に変位する永久磁石１２１から放出される磁力の変化により磁力による起電力が変化し、この変化を電圧の変化として読み取り、外部接続線１２５のうちＶｏｕｔ線を介して外部に出力する。出力されたＶｏｕｔ線の電圧の変化からダイヤフラム１１２の変位量を読み取り、無接点圧力スイッチ１００は圧力スイッチとして動作する。 Next, the operation of the contactless pressure switch 100 of the present invention will be described. When the pressure of the working medium supplied from the working medium supply assembly 10 exceeds the set value, the diaphragm 112 that performs the snap action is reversed from the shape that swells toward the conduit 11 to the shape that swells toward the atmospheric pressure. Along with this, the permanent magnet 121 attached directly to the diaphragm 112 is displaced from the pipe line 11 side to the atmospheric pressure side. The drive circuit mounted on the circuit board 123 receives power supply from the power supply line and the GND line among the external connection lines 125 and drives the Hall IC 122. The Hall IC 122 changes the electromotive force due to the magnetic force due to the change in the magnetic force emitted from the permanent magnet 121 that is displaced from the pipe line 11 side to the atmospheric pressure side, and reads this change as a voltage change. Output to the outside via a line. The displacement amount of the diaphragm 112 is read from the output voltage change of the Vout line, and the non-contact pressure switch 100 operates as a pressure switch.
　以上のように、本実施形態の無接点圧力スイッチによれば、小型、軽量、薄型の永久磁石をダイヤフラムに取りつけ、ホールＩＣ等の小型の磁気検出手段をストッパー及び支持部材により固定することにより、永久磁石の変位をホールＩＣ等の磁気検出手段で読み取ることができ、汚れや汚染された環境でも確実に圧力のＯＮ－ＯＦＦを検出でき、部品点数が少なくシンプルな構成で、位置決めが正確で精度の高い圧力検出を行うことができる。つまり、ダイヤフラムの動きが、ストッパーにより制限され、すなわち、永久磁石の鉛直方向の動きは、ストッパーにより制限され、毎回同じ位置に停止し、ホールＩＣは、ストッパーの大気圧側の面に設置されるので、鉛直方向に対して位置決めが正確にでき、これにより、部品点数が少なくシンプルな構成で位置決めが正確で精度の高い圧力検出を行うことができる。 As described above, according to the contactless pressure switch of the present embodiment, a small, light, thin permanent magnet is attached to the diaphragm, and a small magnetic detection means such as a Hall IC is fixed by a stopper and a support member. The displacement of the permanent magnet can be read by magnetic detection means such as Hall ICs, pressure ON-OFF can be detected reliably even in a dirty or contaminated environment, the number of parts is simple, and the positioning is accurate and accurate. High pressure detection can be performed. That is, the movement of the diaphragm is limited by the stopper, that is, the movement of the permanent magnet in the vertical direction is limited by the stopper and stops at the same position every time, and the Hall IC is installed on the atmospheric pressure side surface of the stopper. Therefore, the positioning can be performed accurately with respect to the vertical direction, whereby the pressure can be detected accurately and accurately with a simple configuration with a small number of parts.
　次に本発明の代替形状について説明する。なお、同一の部材には同一の符号を付し、説明を省略する。 Next, an alternative shape of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same member and description is abbreviate | omitted.
　図２Ａ、図２Ｂは、ストッパー１１３の代替形状を示す図である。 2A and 2B are diagrams showing alternative shapes of the stopper 113. FIG.
　図１に示すストッパー１１３の代わりに、図２Ａに示すような、大気圧側に平面２１０ｂを有するフラットタイプのストッパー２１０を使用しても、あるいは、図２Ｂに示すような、ダイヤフラム１１２に接する側の凹曲面２２０ａに対応した大気圧側の凸曲面２２０ｂを有する凸タイプのストッパー２２０を使用してもよい。図２Ａに示すフラットタイプのストッパー２１０を使用した場合には、ホールＩＣ１２２を設置しやすくなり、位置出し精度を高くしやすくなるという効果を奏する。図２Ｂに示す凸タイプのストッパー２２０を使用した場合には、ダイヤフラム１１２がストッパー２２０に当接するまでの距離を長く取ることができ、ダイヤフラム１１２の変位量を大きくすることができるという効果を奏する。 Instead of the stopper 113 shown in FIG. 1, a flat type stopper 210 having a flat surface 210b on the atmospheric pressure side as shown in FIG. 2A may be used, or the side in contact with the diaphragm 112 as shown in FIG. 2B A convex stopper 220 having a convex curved surface 220b on the atmospheric pressure side corresponding to the concave curved surface 220a may be used. When the flat type stopper 210 shown in FIG. 2A is used, the Hall IC 122 can be easily installed, and the positioning accuracy can be easily increased. When the convex stopper 220 shown in FIG. 2B is used, the distance until the diaphragm 112 abuts against the stopper 220 can be increased, and the displacement amount of the diaphragm 112 can be increased.
　図３Ａ、図３Ｂ、図３Ｃは、ストッパー１１３の収容空間１１３ｂの代替形状を示す図である。 3A, 3B, and 3C are diagrams showing alternative shapes of the accommodation space 113b of the stopper 113. FIG.
　図１に示すストッパー１１３の収容空間１１３ｂの代わりに、図３Ａに示すような、ストッパー３１０の管路１１側に設けられた凹部を収容空間３１０ａとしても、図３Ｂに示すような、ストッパー３２０の中央部に設けられた貫通孔を収容空間３２０ａとしても、図３Ｃに示すような、ストッパー３３０の大気圧側に凸形状３３０ｂを設け、その対向する位置に設けられた凹部を収容空間３３０ａとしてもよい。なお、図３Ａ、図３Ｂでは、図１に示す永久磁石１２１よりも小型、薄型の永久磁石１２１´を使用しており、また、図３Ｃでは、永久磁石１２１´より背の高い永久磁石１２１″を使用している。なお、背の高い永久磁石１２１″を使用した場合には、後述する図５Ｂに示すスライド検知を行いやすくなる。また、図３Ａに示す収容空間３１０ａを使用した場合には、ダイヤフラム１１２に異物が入らなくなり、異物が内部にないため、作動不良等を起こしにくくなるという効果を奏する。図３Ｂに示す収容空間３２０ａを使用した場合には、貫通しているため、ダイヤフラム１１２の上部の内圧が安定し、結果として圧力によるダイヤフラム１１２の変位の推移が安定するという効果を奏する。図３Ｃに示す収容空間３３０ａを使用した場合には、支持部材１３１の位置出しが安定するので、結果としてホールＩＣ１２２の収容位置がばらつかず、作動値が安定するという効果を奏する。 Instead of the accommodating space 113b of the stopper 113 shown in FIG. 1, a concave portion provided on the pipe 11 side of the stopper 310 as shown in FIG. 3A can be used as the accommodating space 310a, and the stopper 320 as shown in FIG. Even if the through hole provided in the central portion is used as the accommodation space 320a, a convex shape 330b is provided on the atmospheric pressure side of the stopper 330 as shown in FIG. 3C, and the concave portion provided at the opposite position is used as the accommodation space 330a. Good. 3A and 3B use a permanent magnet 121 'that is smaller and thinner than the permanent magnet 121 shown in FIG. 1, and in FIG. 3C, a permanent magnet 121' 'that is taller than the permanent magnet 121'. Note that when a tall permanent magnet 121 ″ is used, slide detection shown in FIG. In addition, when the accommodation space 310a shown in FIG. 3A is used, foreign matter does not enter the diaphragm 112, and there is no foreign matter inside, so that it is difficult to cause malfunction or the like. When the accommodation space 320a shown in FIG. 3B is used, since it penetrates, the internal pressure of the upper portion of the diaphragm 112 is stabilized, and as a result, the transition of the displacement of the diaphragm 112 due to the pressure is stabilized. When the accommodation space 330a shown in FIG. 3C is used, the positioning of the support member 131 is stabilized. As a result, the accommodation position of the Hall IC 122 does not vary, and the operation value is stabilized.
　図４Ａ、図４Ｂ、図４Ｃ、図４Ｄは、ホールＩＣ１２２を支持する支持部材１３１の代替形状を示す図である。 4A, 4B, 4C, and 4D are diagrams showing alternative shapes of the support member 131 that supports the Hall IC 122. FIG.
　図１に示すホールＩＣ１２２を支持する支持部材１３１の代わりに、図４Ａに示すような、ストッパー１１３及びダイヤフラム１１２の外周を保持する形状の支持部材４１０を使用しても、図４Ｂに示すような、支持部材４２０、ストッパー１１３、及び、ダイヤフラム１１２の外周を併せて他の部材１０Ａで固定する固定方法を使用しても、図４Ｃに示すような、ストッパー１１３´の大気圧側の面に凸部１１３´ａを設け、支持部材４３０の管路１１側の面に凹部４３０ａを設けて位置決めする形状の固定方法を使用しても、図４Ｄに示すような、ストッパー１１３″の大気圧側の面に凹部１１３″ａを設け、支持部材４４０の管路１１側の面に凸部４４０ａを設けて位置決めする形状の固定方法を使用してもよい。 In place of the support member 131 that supports the Hall IC 122 shown in FIG. 1, a support member 410 that holds the outer periphery of the stopper 113 and the diaphragm 112 as shown in FIG. Even if a fixing method in which the outer periphery of the support member 420, the stopper 113, and the diaphragm 112 is fixed together with another member 10A is used, the stopper 113 ′ is protruded on the atmospheric pressure side surface as shown in FIG. 4C. Even if a fixing method having a shape in which a portion 113′a is provided and a concave portion 430a is provided on the surface of the support member 430 on the side of the pipe line 11 and positioned is used, the stopper 113 ″ shown in FIG. A fixing method may be used in which a concave portion 113 ″ a is provided on the surface and a convex portion 440a is provided on the surface of the support member 440 on the side of the pipe line 11 for positioning.
　図５Ａ、図５Ｂは、ホールＩＣ１２２の検知方法の代替方法を示す図である。 FIG. 5A and FIG. 5B are diagrams showing an alternative method of the detection method of the Hall IC 122.
　図１に示す永久磁石１２１をホールＩＣ１２２で検出する方法の代わりに、図５Ａに示すような、永久磁石１２１´の直上にホールＩＣ１２２を配置し、永久磁石１２１´の鉛直方向の接近と離脱を検出する鉛直検知を行っても、図５Ｂに示すような、永久磁石１２１´の変位する範囲に横向きにホールＩＣ１２２を配置し、永久磁石１２１´の横方向の変位を検出するスライド検知を行ってもよい。なお、図５Ａに示す鉛直検知の場合には、検出する磁力の強弱が大きく検出精度が高くなるという効果があり、図５Ｂに示すスライド検知の場合には、広い範囲の検出を行うことができ、長いストロークの検出が行えるという効果がある。 Instead of the method of detecting the permanent magnet 121 shown in FIG. 1 with the Hall IC 122, the Hall IC 122 is arranged immediately above the permanent magnet 121 ′ as shown in FIG. Even if vertical detection to be detected is performed, the Hall IC 122 is disposed laterally in the range in which the permanent magnet 121 ′ is displaced, as shown in FIG. 5B, and slide detection is performed to detect the lateral displacement of the permanent magnet 121 ′. Also good. In the case of the vertical detection shown in FIG. 5A, there is an effect that the strength of the magnetic force to be detected is large and the detection accuracy is high, and in the case of the slide detection shown in FIG. 5B, a wide range of detection can be performed. There is an effect that a long stroke can be detected.
　図６は、第１の変形例６００を示す図である。 FIG. 6 is a diagram showing a first modified example 600.
　図６において、第１の変形例６００は、図２Ａに示すようなフラットタイプのストッパー６１３を使用し、図３Ａに示すような凹部を収容空間６１３ａとし、図４Ｂに示すような支持部材６３１、ストッパー６１３、及び、ダイヤフラム１１２の外周を併せて他の部材である作動媒体供給アセンブリ１０´で固定する固定方法を使用し、図５Ａに示すような、永久磁石１２１´の鉛直方向の接近と離脱をホールＩＣ１２２で検出する鉛直検知を組み合わせた形態を有する。なお、図６において、第１の変形例６００はキャップ１１１がなく、ダイヤフラム１１２は、ストッパー６１３のみに支持され、ダイヤフラム１１２のストロークは、作動媒体供給アセンブリ１０´により制限される。 In FIG. 6, the first modification 600 uses a flat type stopper 613 as shown in FIG. 2A, and a concave portion as shown in FIG. 3A is used as an accommodation space 613 a, and a support member 631 as shown in FIG. 4B, Using the fixing method of fixing the outer periphery of the stopper 613 and the diaphragm 112 together with the working medium supply assembly 10 ′ which is another member, the vertical approach and separation of the permanent magnet 121 ′ as shown in FIG. 5A Is combined with vertical detection for detecting the signal by the Hall IC 122. In FIG. 6, the first modification 600 does not have the cap 111, the diaphragm 112 is supported only by the stopper 613, and the stroke of the diaphragm 112 is limited by the working medium supply assembly 10 ′.
　図７は、第２の変形例７００を示す図である。 FIG. 7 is a diagram showing a second modified example 700.
　図７において、第２の変形例７００は、図２Ｂに示すような凸タイプのストッパー７１３を使用し、図３Ｂに示すような貫通孔を収容空間７１３ａとし、図４Ａに示すようなストッパー７１３及びダイヤフラム１１２の外形を保持する支持部材７３１ｂを使用し、図５Ｂに示すような永久磁石１２１″の横方向の変位を検出するスライド検知を組み合わせた形態を有する。なお、図７において、支持部材７３１は、ダイヤフラムアセンブリ７１０及び磁気検出部７２０を保持する支持部材７３１Ａと、支持部材７３１Ａを上から保持し、固定ネジ１３４及びワッシャー１３５により作動媒体供給アセンブリ１０″に固定する支持部材７３１Ｂの２つの支持部材により構成されている。 In FIG. 7, the second modification 700 uses a convex stopper 713 as shown in FIG. 2B, and a through hole as shown in FIG. 3B is used as the accommodation space 713a, and the stopper 713 as shown in FIG. 4A and The support member 731b that holds the outer shape of the diaphragm 112 is used, and the slide detection for detecting the lateral displacement of the permanent magnet 121 ″ as shown in FIG. 5B is combined. In FIG. The support member 731A that holds the diaphragm assembly 710 and the magnetic detection unit 720, and the support member 731B that holds the support member 731A from above and is fixed to the working medium supply assembly 10 ″ by the fixing screw 134 and the washer 135. It is comprised by the member.
　図８は、第３の変形例８００を示す図である。 FIG. 8 is a diagram showing a third modified example 800.
　図８において、第３の変形例８００は、図２Ａに示すようなフラットタイプのストッパー８１３を使用し、図３Ｃに示すようなストッパー８１３の大気圧側に凸形状８１３ｂを設け、その対向する位置に設けられた凹部を収容空間８１３ａとし、図４Ｂに示すような、支持部材８３１、ストッパー８１３、及び、ダイヤフラム１１２の外周を併せて他の部材である継手管８０１で固定する固定方法を使用し、図５Ａに示すような、永久磁石１２１´の鉛直方向の接近と離脱をホールＩＣ１２２で検出する鉛直検知を組み合わせた形態を有する。なお、図８において、継手管８０１は、作動媒体の圧力が導かれる配管に連通する作動媒体通路８０１ａと、作動媒体通路８０１ａの一端から円錐状に拡大して形成される受圧室８０１ｂと、ダイヤフラムアセンブリ８１０と支持部材８３１をかしめて固定するかしめ部８０１ｃとを有する。なお、継手管８０１は、上述の形状に限定されず、様々な形状に適用可能である。また、継手管８０１は、プレス成形、切削加工、ダイキャスト、鍛造等により、例えば、金属材料で成形される。 In FIG. 8, the third modification 800 uses a flat type stopper 813 as shown in FIG. 2A, and a convex shape 813b is provided on the atmospheric pressure side of the stopper 813 as shown in FIG. 4B is used, and the outer periphery of the support member 831, the stopper 813, and the diaphragm 112 is fixed together with a joint pipe 801 that is another member as shown in FIG. 4B. As shown in FIG. 5A, the permanent magnet 121 ′ has a configuration in which the vertical detection for detecting the approach and separation in the vertical direction by the Hall IC 122 is combined. In FIG. 8, a joint pipe 801 includes a working medium passage 801a communicating with a pipe through which the pressure of the working medium is guided, a pressure receiving chamber 801b formed conically expanding from one end of the working medium passage 801a, and a diaphragm. An assembly 810 and a caulking portion 801c for caulking and fixing the support member 831 are provided. The joint pipe 801 is not limited to the above-described shape, and can be applied to various shapes. The joint pipe 801 is formed of, for example, a metal material by press molding, cutting, die casting, forging, or the like.
　図１０Ａは、永久磁石１２１の取り付け方法の代替方法であって、永久磁石１０２１がダイヤフラム１１２の外周に取り付けられる形態を示す図であり、図１０Ｂは、ホールＩＣ１２２の取り付け方法の代替方法であって、ホールＩＣ１２２がスペーサ１０２６を介してストッパー１０１３ｂに取り付けられる形態を示す図であり、図１０Ｃは、ホールＩＣ１２２が支持部材に取り付けられる形態を示す図であり、図１０Ｄは、ホールＩＣ１０２２が回路基板１０２３´に取り付けられる形態を示す図である。 FIG. 10A is an alternative method of attaching the permanent magnet 121, and shows a form in which the permanent magnet 1021 is attached to the outer periphery of the diaphragm 112. FIG. 10B is an alternative method of attaching the Hall IC 122. FIG. 10C is a view showing a form in which the Hall IC 122 is attached to the stopper 1013b via the spacer 1026, FIG. 10C is a view showing a form in which the Hall IC 122 is attached to the support member, and FIG. 10D is a view in which the Hall IC 1022 is attached to the circuit board 1023. It is a figure which shows the form attached to '.
　図１０Ａに示すように、図１に示す永久磁石１２１の代わりに、ダイヤフラム１１２の外周に永久磁石１０２１を取り付けるものとしてもよい。この場合、ホールＩＣ１２２は、永久磁石１０２１により磁化されたダイヤフラム１１２の磁力の変化を検出し、これによりダイヤフラム１１２の変位を検出する。なお、ここでは、永久磁石１０２１がダイヤフラム１１２の外周に取り付けるものとしたが、これには限定されず、ダイヤフラム１１２を磁化できる位置であればよい。なお、永久磁石１０２１をダイヤフラム１１２の外周に取り付けることにより、ダイヤフラム１１２の反転動作の変動が少なく、永久磁石１０２１が外れにくいという効果がある。また、ホールＩＣ１２２をストッパー１１３の大気圧側の中央に配置されるものとしたが、これには限定されず、永久磁石１０２１により磁化されたダイヤフラム１１２の磁力の変化を検出できればよい。 As shown in FIG. 10A, a permanent magnet 1021 may be attached to the outer periphery of the diaphragm 112 instead of the permanent magnet 121 shown in FIG. In this case, the Hall IC 122 detects a change in the magnetic force of the diaphragm 112 magnetized by the permanent magnet 1021, thereby detecting the displacement of the diaphragm 112. Here, the permanent magnet 1021 is attached to the outer periphery of the diaphragm 112. However, the present invention is not limited to this, and any position can be used as long as the diaphragm 112 can be magnetized. It should be noted that attaching the permanent magnet 1021 to the outer periphery of the diaphragm 112 has the effect that there is little fluctuation in the reversing operation of the diaphragm 112 and the permanent magnet 1021 is difficult to come off. In addition, the Hall IC 122 is arranged at the center of the stopper 113 on the atmospheric pressure side, but the present invention is not limited to this, and it is only necessary to detect a change in the magnetic force of the diaphragm 112 magnetized by the permanent magnet 1021.
　また、図１０Ｂに示すように、図９に示すような永久磁石９２１とダイヤフラム１１２の間にスペーサ９２６を設ける代わりに、ホールＩＣ１２２とストッパー１０１３ｂの間にスペーサ１０２６を設けるものとしてもよい。このような構成により、ホールＩＣ１２２の位置を調整することができ、組み立て工数を必要以上に多くすることなく、ホールＩＣ１２２で検出される永久磁石１０２１´から放出される磁力を調整できる。 As shown in FIG. 10B, instead of providing the spacer 926 between the permanent magnet 921 and the diaphragm 112 as shown in FIG. 9, a spacer 1026 may be provided between the Hall IC 122 and the stopper 1013b. With such a configuration, the position of the Hall IC 122 can be adjusted, and the magnetic force emitted from the permanent magnet 1021 ′ detected by the Hall IC 122 can be adjusted without increasing the number of assembly steps more than necessary.
　また、図１０Ｃに示すように、図４Ａ乃至図４Ｄ、図６に示す支持部材４１０、４２０、４３０、４４０、６３１等のようにストッパー１１３、１１３´、１１３″、６１３等に取り付けられたホールＩＣ１２２を固定するだけではなく、ホールＩＣ１２２が直接取りつけられる支持部材１０３１ｃを設けるものとしてもよい。このように、ストッパー１０１３ｃに接触させずに、樹脂等の絶縁材で形成された支持部材１０３１ｃに直接取り付けることにより、ホールＩＣ１２２がショートしにくくなるとともに、ノイズによる誤作動を起こしにくくなる等、信頼性を高く保つことができる。 Further, as shown in FIG. 10C, holes attached to the stoppers 113, 113 ′, 113 ″, 613, etc., like the support members 410, 420, 430, 440, 631, etc. shown in FIGS. 4A to 4D, FIG. In addition to fixing the IC 122, a support member 1031c to which the Hall IC 122 is directly attached may be provided. Thus, the support member 1031c formed of an insulating material such as a resin is directly contacted without contacting the stopper 1013c. By mounting, the Hall IC 122 is less likely to be short-circuited, and malfunctions due to noise are less likely to occur, thereby maintaining high reliability.
　また、図１０Ｄに示すように、図６等に示すように、ホールＩＣ１２２をストッパー６１３に取り付ける構成の代わりに、ホールＩＣ１０２２を回路基板１０２３´に直接実装するものとしてもよい。このような構成とすることにより、ホールＩＣ１０２２の接続信頼性が高くなるとともに、リード線１２４を使用する必要がないため、コストダウンも見込むことができる。 As shown in FIG. 10D, the Hall IC 1022 may be directly mounted on the circuit board 1023 ′ instead of the configuration in which the Hall IC 122 is attached to the stopper 613 as shown in FIG. 6 and the like. By adopting such a configuration, the connection reliability of the Hall IC 1022 is increased and it is not necessary to use the lead wire 124, so that a cost reduction can be expected.
　以上説明したように、本発明の無接点圧力スイッチによれば、小型、軽量、薄型の永久磁石をダイヤフラムに取りつけ、ホールＩＣ等の小型の磁気検出手段をストッパー及び支持部材により固定することにより、永久磁石の変位をホールＩＣ等の磁気検出手段で読み取ることができ、汚れや汚染された環境でも確実に圧力のＯＮ－ＯＦＦを検出でき、部品点数が少なくシンプルな構成で、位置決めが正確で精度の高い圧力検出を行うことができる。 As described above, according to the contactless pressure switch of the present invention, a small, lightweight, thin permanent magnet is attached to a diaphragm, and a small magnetic detection means such as a Hall IC is fixed by a stopper and a support member. The displacement of the permanent magnet can be read by magnetic detection means such as Hall ICs, pressure ON-OFF can be detected reliably even in a dirty or contaminated environment, the number of parts is simple, and the positioning is accurate and accurate. High pressure detection can be performed.
　１０、１０´、１０″　作動媒体供給アセンブリ
　１１、１１´、１１″　管路
　１２、１３３　Ｏリング
　１００、６００、７００、８００、９００　無接点圧力スイッチ
　１１０、６１０、７１０、８１０、９１０、１０１０ｂ、１０１０ｃ、１０１０ｄ　ダイヤフラムアセンブリ
　１１１、９１１、１０１１ｂ　キャップ
　１１２　ダイヤフラム
　１１３、１１３´、１１３″、２１０、２２０、７１３、９１３、１０１３ｂ、１０１３ｃ、１０１３ｄ　ストッパー
　１１３ｂ、３１０ａ、３２０ａ、３３０ａ　収容空間
　１２０、６２０、７２０、８２０　磁気検出部
　１２１、１２１´、１２１″、９２１、１０２１、１０２１´、１０２１″　永久磁石
　１２２、１０２２　ホールＩＣ
　１２３、６２３、７２３、８２３、１０２３、１０２３´　回路基板
　１２４　リード線
　１２５　外部接続線
　１３０、６３０、７３０、８３０、１０３０ｃ、１０３０ｄ　固定部
　１３１、４１０、４２０、４３０、４４０、６３１、７３１Ａ、７３１Ｂ、１０３１ｃ、１０３１ｄ　支持部材
　１３２、６３２、８３２　封止材
　１３４　固定ネジ
　１３５　ワッシャー
　８０１　継手管
　９２６、１０２６　スペーサ 10, 10 ′, 10 ″ working medium supply assembly 11, 11 ′, 11 ″ conduit 12, 133 O- ring 100, 600, 700, 800, 900 Non-contact pressure switch 110, 610, 710, 810, 910, 1010b, 1010c, 1010d Diaphragm assembly 111, 911, 1011b Cap 112 Diaphragm 113, 113 ′, 113 ″, 210, 220, 713, 913, 1013b, 1013c, 1013d Stopper 113b, 310a, 320a, 330a Storage space 120, 620, 720, 820 Magnetic detector 121, 121 ′, 121 ″, 921, 1021, 1021 ′, 1021 ″ Permanent magnet 122, 1022 Hall IC
123, 623, 723, 823, 1023, 1023 'circuit board 124 lead wire 125 external connection line 130, 630, 730, 830, 1030c, 1030d fixing part 131, 410, 420, 430, 440, 631, 731A, 731B, 1031c, 1031d Support member 132, 632, 832 Sealing material 134 Fixing screw 135 Washer 801 Joint pipe 926, 1026 Spacer

Claims (18)

  1. 　管路から供給される作動媒体の圧力に応じて形状が変位するダイヤフラムと、
    　前記ダイヤフラムの前記管路に対向する大気圧側の面に取り付けられた永久磁石と、
    　前記ダイヤフラムの前記大気圧側に設けられ、前記ダイヤフラムが変位した場合に前記永久磁石が収容される収容空間を有するストッパーと、
    　前記ストッパーの前記大気圧側の面に配置され、前記ダイヤフラムと共に変位する前記永久磁石の磁力の変化を検出することにより、前記ダイヤフラムの変位を検出する磁気検出手段と
    　を備えることを特徴とする無接点圧力スイッチ。     A diaphragm whose shape is displaced according to the pressure of the working medium supplied from the pipe;
    A permanent magnet attached to a surface on the atmospheric pressure side facing the pipe line of the diaphragm;
    A stopper provided on the atmospheric pressure side of the diaphragm and having an accommodation space in which the permanent magnet is accommodated when the diaphragm is displaced;
    And a magnetic detection means for detecting displacement of the diaphragm by detecting a change in magnetic force of the permanent magnet which is disposed on the atmospheric pressure side surface of the stopper and is displaced together with the diaphragm. Contact pressure switch.
  2. 　前記永久磁石は、前記ダイヤフラムの前記管路に対向する大気圧側の面に直接取り付けられることを特徴とする請求項１に記載の無接点圧力スイッチ。 2. The contactless pressure switch according to claim 1, wherein the permanent magnet is directly attached to a surface of the diaphragm on the atmospheric pressure side facing the pipe line.
  3. 　前記永久磁石は、前記ダイヤフラムの前記管路に対向する大気圧側の面にスペーサを介して取り付けられることを特徴とする請求項１に記載の無接点圧力スイッチ。 2. The contactless pressure switch according to claim 1, wherein the permanent magnet is attached to a surface of the diaphragm on the atmospheric pressure side facing the pipe line via a spacer.
  4. 　前記磁気検出手段は、前記ストッパーの前記管路に対向する大気圧側の面にスペーサを介して取り付けられることを特徴とする請求項１に記載の無接点圧力スイッチ。 2. The contactless pressure switch according to claim 1, wherein the magnetic detection means is attached to a surface of the stopper facing the atmospheric pressure side through a spacer.
  5. 　前記ストッパーの前記大気圧側に配置され、前記磁気検出手段を固定する支持部材をさらに備えることを特徴とする請求項１に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 1, further comprising a support member that is disposed on the atmospheric pressure side of the stopper and fixes the magnetic detection means.
  6. 　前記支持部材は、前記ストッパー、及び、前記ダイヤフラムの外周を保持する形状を有することを特徴とする請求項５に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 5, wherein the support member has a shape that holds an outer periphery of the stopper and the diaphragm.
  7. 　前記支持部材、前記ストッパー、及び、前記ダイヤフラムの外周を他の部材で固定することを特徴とする請求項５に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 5, wherein the support member, the stopper, and the outer periphery of the diaphragm are fixed by other members.
  8. 　前記磁気検出手段は、ホールＩＣであることを特徴とする請求項１に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 1, wherein the magnetic detection means is a Hall IC.
  9. 　前記ダイヤフラムは、前記作動媒体の圧力に応じて反転動作、すなわち、スナップアクションするばね性を有する金属製のダイヤフラムであることを特徴とする請求項１に記載の無接点圧力スイッチ。 2. The contactless pressure switch according to claim 1, wherein the diaphragm is a metallic diaphragm having a spring property that performs a reverse action, that is, a snap action according to the pressure of the working medium.
  10. 　前記ストッパーは、大気圧側の面が平坦のフラットタイプであることを特徴とする請求項１に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 1, wherein the stopper is a flat type having a flat surface on the atmospheric pressure side.
  11. 　前記ストッパーは、大気圧側の面が凸曲面の凸タイプであることを特徴とする請求項１に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 1, wherein the stopper is a convex type having a convex surface on the atmospheric pressure side.
  12. 　前記収容空間は、前記ストッパーの前記管路側の面に設けられた凹部であることを特徴とする請求項１に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 1, wherein the accommodating space is a recess provided on a surface of the stopper on the pipe line side.
  13. 　前記収容空間は、前記ストッパーの中央部に設けられた貫通孔であることを特徴とする請求項１に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 1, wherein the accommodating space is a through hole provided in a central portion of the stopper.
  14. 　前記収容空間は、前記ストッパーの大気圧側に凸形状を設け、その対向する位置に設けられた凹部であることを特徴とする請求項１に記載の無接点圧力スイッチ。 The contactless pressure switch according to claim 1, wherein the accommodating space is a concave portion provided on the atmospheric pressure side of the stopper and provided at a position opposed to the convex shape.
  15. 　前記磁気検出手段は、前記永久磁石の直上に配置され、前記永久磁石の鉛直方向の接近と離脱を検出する鉛直検知を行うように構成されることを特徴とする請求項１に記載の無接点圧力スイッチ。 2. The contactless device according to claim 1, wherein the magnetic detection unit is arranged immediately above the permanent magnet and configured to perform vertical detection for detecting approach and separation of the permanent magnet in a vertical direction. pressure switch.
  16. 　前記磁気検出手段は、前記永久磁石の変位する範囲に横向きに配置され、前記永久磁石の横方向の変位を検出するスライド検知を行うように構成されることを特徴とする請求項１に記載の無接点圧力スイッチ。 The said magnetic detection means is arrange | positioned sideways in the range which the said permanent magnet displaces, and it is comprised so that the slide detection which detects the displacement of the horizontal direction of the said permanent magnet may be performed. Non-contact pressure switch.
  17. 　前記管路と接続され作動媒体の圧力が導かれる作動媒体通路と、前記作動媒体通路の一端から拡大して形成される受圧室と、前記ダイヤフラム、前記ストッパー、及び、前記支持部材をかしめて固定するかしめ部とを有する継手管をさらに備えることを特徴とする請求項５に記載の無接点圧力スイッチ。 The working medium passage connected to the pipe line to guide the pressure of the working medium, the pressure receiving chamber formed by expanding from one end of the working medium passage, the diaphragm, the stopper, and the support member are caulked and fixed. The contactless pressure switch according to claim 5, further comprising a joint pipe having a caulking portion.
  18. 　管路から供給される作動媒体の圧力に応じて形状が変位する金属製のダイヤフラムと、
    　前記ダイヤフラムの外周に取り付けられた永久磁石と、
    　前記ダイヤフラムの前記大気圧側に設けられ、前記ダイヤフラムが変位した場合に前記永久磁石が収容される収容空間を有するストッパーと、
    　前記ストッパーの前記大気圧側の面に配置され、前記永久磁石により磁化された前記ダイヤフラムの磁力の変化を検出することにより、前記ダイヤフラムの変位を検出する磁気検出手段と
    　を備えることを特徴とする無接点圧力スイッチ。     A metal diaphragm whose shape is displaced according to the pressure of the working medium supplied from the pipe;
    A permanent magnet attached to the outer periphery of the diaphragm;
    A stopper provided on the atmospheric pressure side of the diaphragm and having an accommodation space in which the permanent magnet is accommodated when the diaphragm is displaced;
    And a magnetic detection means for detecting a displacement of the diaphragm by detecting a change in magnetic force of the diaphragm magnetized by the permanent magnet and disposed on the atmospheric pressure side surface of the stopper. Non-contact pressure switch.
PCT/JP2016/002494 2015-06-18 2016-05-23 Contactless pressure switch WO2016203711A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015734U (en) * 1983-07-12 1985-02-02 株式会社　京浜精機製作所 pressure switch
JPH04131836U (en) * 1991-05-23 1992-12-04 進 生方 pressure detector
JPH08327484A (en) * 1995-05-30 1996-12-13 Aisin Seiki Co Ltd Pressure sensor
JPH097477A (en) * 1995-06-22 1997-01-10 Aisin Seiki Co Ltd Pressure switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015734U (en) * 1983-07-12 1985-02-02 株式会社　京浜精機製作所 pressure switch
JPH04131836U (en) * 1991-05-23 1992-12-04 進 生方 pressure detector
JPH08327484A (en) * 1995-05-30 1996-12-13 Aisin Seiki Co Ltd Pressure sensor
JPH097477A (en) * 1995-06-22 1997-01-10 Aisin Seiki Co Ltd Pressure switch

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