WO2016027496A1 - Actionneur - Google Patents

Actionneur Download PDF

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Publication number
WO2016027496A1
WO2016027496A1 PCT/JP2015/060309 JP2015060309W WO2016027496A1 WO 2016027496 A1 WO2016027496 A1 WO 2016027496A1 JP 2015060309 W JP2015060309 W JP 2015060309W WO 2016027496 A1 WO2016027496 A1 WO 2016027496A1
Authority
WO
WIPO (PCT)
Prior art keywords
bimetal
actuator
resistor pattern
metal resistor
present
Prior art date
Application number
PCT/JP2015/060309
Other languages
English (en)
Japanese (ja)
Inventor
謙一 小谷
崇宏 栗原
Original Assignee
株式会社 村田製作所
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 村田製作所 filed Critical 株式会社 村田製作所
Publication of WO2016027496A1 publication Critical patent/WO2016027496A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting

Definitions

  • This invention relates to an actuator provided with a bimetal.
  • a switch using a bimetal is known.
  • the switch is configured such that, when the temperature reaches or exceeds a predetermined set temperature, the bimetal is inverted to operate the movable contact and to switch the contact.
  • the bimetal is reversed again, and the contact returns to the original state. Therefore, in order to maintain the state after the contact once operates, for example, a flexible resistor that follows the inversion of the bimetal is provided on the surface of the bimetal, and when the bimetal is inverted, the resistor is A switch that energizes and heats the bimetal has been proposed (see, for example, Patent Document 1).
  • the resistor is a PTC resistor formed by blending resin and carbon particles in an elastomer and is formed into a film shape that is polymerized on the bimetal surface. It is formed by a method such as polymerization to bimetal with an adhesive or polymerization by printing.
  • a resistor has low durability. For this reason, when a resistor is provided in the inversion operation portion of the bimetal, it is easy to cause disconnection due to bending by the inversion operation. Further, if a resistance layer is provided to avoid the bimetal inversion operation portion, a large amount of electric power is required to raise the temperature of the inversion operation portion.
  • the present invention solves the above problems, and an object of the present invention is to provide an actuator having a heat generating element that is highly resistant to bending caused by bimetal operation.
  • an actuator of the present invention includes a movable body and a power feeding unit that feeds power to the movable body, and the movable body includes a bimetal, an insulating layer formed on the bimetal surface, and the And a metal resistor pattern attached via an insulating layer, wherein the power feeding unit feeds power to the metal resistor pattern in an insulated state from the bimetal.
  • both ends of the metal resistor pattern have a lead-out portion that is drawn to the outside of the bimetal.
  • the metal resistor pattern is made of a material selected from the group consisting of chromium, nickel, manganese, and alloys thereof, and the cross-sectional area of the metal resistor pattern is preferably 0.1 mm 2 or less.
  • the metal resistor pattern has a portion that does not contribute to energization.
  • the bimetal is a snap action type bimetal that reverses in response to temperature.
  • an insulating layer corresponding to the lead portion of the metal resistor pattern is not formed.
  • one of the lead portions of the metal resistor pattern is electrically connected to the bimetal, and the other has a protrusion.
  • an actuator having a heat generating element that is highly resistant to bending caused by bimetal operation.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of an actuator 10 according to the first embodiment of the present invention.
  • FIG. 2 is a perspective view of the actuator 10 according to the first embodiment of the present invention.
  • FIG. 2A shows the actuator 10 in a steady state
  • FIG. 2B shows the actuator 10 in a reverse operation.
  • FIG. 3 is a diagram illustrating a schematic configuration of the actuator 20 according to the second embodiment of the present invention at a steady state.
  • 3A is a perspective view of the actuator 20 in a steady state
  • FIG. 3B is a cross-sectional view showing a II cross section of FIG. 3A
  • FIG. 3C is an end portion of the actuator 20 in a steady state.
  • FIG. 4 is a diagram showing a schematic configuration during the reversing operation of the actuator 20 according to the second embodiment of the present invention.
  • 4A is a perspective view of the actuator 20 during the reversing operation
  • FIG. 4B is a cross-sectional view showing the II cross section of FIG. 4A
  • FIG. 4C is the cross-sectional view of the actuator 20 during the reversing operation. It is an expanded sectional view of an end.
  • FIG. 5 is a diagram showing a schematic configuration of the actuator 30 according to the third embodiment of the present invention at a steady state.
  • 5A is a perspective view of the actuator 30 in a steady state
  • FIG. 5B is a cross-sectional view showing a II cross section of FIG. 5A
  • FIG. 5C is an end portion of the actuator 30 in a steady state.
  • FIG. FIG. 6 is a diagram showing a schematic configuration during the reversing operation of the actuator 30 according to the third embodiment of the present invention.
  • 6A is a perspective view of the actuator 30 during the reversing operation
  • FIG. 6B is a cross-sectional view taken along the line II of FIG. 6A
  • FIG. 6C is a cross-sectional view of the actuator 30 during the reversing operation. It is an expanded sectional view of an end.
  • FIG. 7 is a perspective view of an actuator 40 according to the fourth embodiment of the present invention.
  • FIG. 8 is a perspective view of an actuator 50 according to the fifth embodiment of the present invention.
  • FIG. 8A shows the actuator 50 in a steady state
  • FIG. 8B shows the actuator 50 in a bending operation.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of an actuator 10 according to the first embodiment of the present invention.
  • FIG. 2 is a perspective view of the actuator 10 according to the first embodiment of the present invention.
  • FIG. 2A shows the actuator 10 in a steady state
  • FIG. 2B shows the actuator 10 in a reverse operation.
  • the actuator 10 of this embodiment includes a movable body 5 and a power feeding unit 4 that feeds power to the movable body 5.
  • the movable body 5 includes a bimetal 1, an insulating layer 2 formed on the surface of the bimetal 1, and a metal resistor pattern 3 attached via the insulating layer 2. Since the insulating layer 2 is disposed between the bimetal 1 and the metal resistor pattern 3, the power supply unit 4 supplies power to the metal resistor pattern 3 while being insulated from the bimetal 1.
  • the metal resistor pattern 3 generates Joule heat when energized.
  • the bimetal 1 is heated by this heat generation and operates.
  • a so-called snap action type bimetal is used as the bimetal 1.
  • the snap action type bimetal is a curved plate in which the first main surface is convex and the second main surface is concave when not heated, the first main surface is concave and the second main surface is convex when heated, It is a bimetal in which the convex surface and the concave surface are reversed by a snap operation during heating and during heating.
  • a patterned metal foil can be used as the metal resistor pattern 3.
  • the pattern is formed with a width of, for example, 0.5 mm or less, and a method such as press working or etching can be suitably used to form a pattern with such a small width.
  • the metal resistor pattern 3 is preferably made of a material selected from the group consisting of chromium, nickel, manganese, and alloys thereof, and the cross-sectional area is preferably 0.1 mm 2 or less. By using such a material and cross-sectional area, the resistance value of the metal resistor pattern 3 can be increased, so that heat can be generated without requiring a large current.
  • the bimetal 1 is not broken by bending due to the reversing operation. Moreover, since the linear expansion coefficient of the material forming the bimetal 1 and the metal resistor pattern 3 can be set to a close value, disconnection or peeling due to a temperature change hardly occurs. Furthermore, by making the shape of the metal resistor pattern 3 easy to follow the bending of the bimetal 1 like the shape of the metal resistor pattern 3 in the present embodiment, the above disconnection and peeling are further prevented. Can do. These effects are particularly noticeable in a snap action type bimetal that reverses in response to temperature, and can be suitably applied to a snap action type bimetal.
  • the shape of the metal resistor pattern 3 is not limited to the embodiment shown in FIG. 1, and may be a spiral shape or the like.
  • the insulating layer 2 is not limited as long as the bimetal 1 and the metal resistor pattern 3 can be electrically insulated. However, when an insulating adhesive, an insulating adhesive sheet, an insulating double-sided tape, or the like is used, the metal resistor It can be easily provided by pasting the pattern 3, which is preferable.
  • FIG. 1 it has the extraction
  • FIG. The drawer 6 can be used for power feeding and positioning of the actuator 10. With such a structure, power can be supplied with the end of the metal resistor pattern 3 being pulled out and fixed, so that malfunction due to poor contact can be prevented.
  • the insulating layer 2 is formed partway through the lead-out portion 6, it is possible to prevent malfunction caused by a short circuit between the edge of the bimetal 1 and the metal resistor pattern 3.
  • the actuator 10 of the present embodiment has a feature that power can be supplied even in a steady state.
  • the bimetal reverses when the temperature exceeds a predetermined temperature, and the bimetal is heated by energizing the inverted shape, and the bimetal inversion state is maintained.
  • the actuator 10 can supply power even in a steady state, it can intentionally perform a reversing operation by energization regardless of changes in the environmental temperature.
  • FIG. 3 is a diagram illustrating a schematic configuration of the actuator 20 according to the second embodiment of the present invention at a steady state.
  • 3A is a perspective view of the actuator 20 in a steady state
  • FIG. 3B is a cross-sectional view showing a II cross section of FIG. 3A
  • FIG. 3C is an end portion of the actuator 20 in a steady state.
  • FIG. 4 is an enlarged cross-sectional view of a part surrounded by a two-dot chain line in FIG.
  • FIG. 4 is a diagram showing a schematic configuration during the reversing operation of the actuator 20 according to the second embodiment of the present invention.
  • 4A is a perspective view of the actuator 20 during the reversing operation
  • FIG. 4B is a cross-sectional view showing the II cross section of FIG. 4A
  • FIG. 4C is the cross-sectional view of the actuator 20 during the reversing operation.
  • FIG. 5 is an enlarged cross-sectional view of an end portion (portion surrounded by a two-dot chain line in FIG. 4B).
  • the insulating layer 2 is not formed on the portion of the metal resistor pattern 3 that faces the lead portion 6.
  • the drawer 6 is not in contact with the bimetal 1 in a steady state. Therefore, in a steady state, when the lead portion 6 of the metal resistor pattern 3 is used as the power feeding portion 4 to supply power, a current flows through the metal resistor pattern 3 and the bimetal 1 is inverted by Joule heat.
  • the lead-out portion 6 comes into contact with the edge of the bimetal 1. Since the resistance value of the bimetal 1 is smaller than the resistance value of the metal foil (metal resistor pattern 3), the resistance value between the power feeding units 4 and 4 becomes small when the lead-out portion 6 contacts the edge of the bimetal 1. At this time, the operation of the actuator 20 can be detected by monitoring the resistance value between the power feeding units 4 and 4. When the decrease in resistance value due to the reversal operation of the bimetal 1 is detected and the energization is stopped, the bimetal 1 returns to the steady state by natural cooling. By such an operation, the actuator 20 can be easily continuously driven. If the energization is not stopped in the above description, it is preferable that the energization is stopped because the current continues to flow through the bimetal 1 and it takes time for cooling.
  • FIG. 5 is a diagram showing a schematic configuration of the actuator 30 according to the third embodiment of the present invention at a steady state.
  • 5A is a perspective view of the actuator 30 in a steady state
  • FIG. 5B is a cross-sectional view showing a II cross section of FIG. 5A
  • FIG. 5C is an end portion of the actuator 30 in a steady state.
  • FIG. 6 is an enlarged cross-sectional view of a portion surrounded by a two-dot chain line in FIG.
  • FIG. 6 is a diagram showing a schematic configuration during the reversing operation of the actuator 30 according to the third embodiment of the present invention.
  • 6A is a perspective view of the actuator 30 during the reversing operation
  • FIG. 6B is a cross-sectional view taken along the line II of FIG. 6A
  • FIG. 6C is a cross-sectional view of the actuator 30 during the reversing operation.
  • FIG. 7 is an enlarged cross-sectional view of an end portion (portion surrounded by a two-dot chain line in FIG. 6B).
  • the insulating layer 2 is not formed on the portion of the metal resistor pattern 3 that faces the lead-out portion 6 as in the actuator 20 according to the second embodiment.
  • one lead portion 6 ⁇ / b> A of the metal resistor pattern 3 is electrically connected to the bimetal 1
  • the projection portion 7 is provided on the other lead portion 6 ⁇ / b> B.
  • the lead portion 6 ⁇ / b> A is electrically connected to the bimetal 1 by the conductive layer 8.
  • the conductive layer 8 As the conductive layer 8, a conductive adhesive or the like can be used.
  • the actuator 30 is in contact with the bimetal 1 through the conductive layer 8 in the steady state, but the drawer 6B is not in contact with the bimetal 1. . Accordingly, when power is supplied using the lead portions 6A and 6B of the metal resistor pattern 3 as the power supply portions 4 and 4 in a steady state, a current flows through the metal resistor pattern 3 and the bimetal 1 is inverted by Joule heat.
  • the protruding portion 7B of the lead-out portion 6B comes into contact with the bimetal 1. Thereby, the resistance value between the electric power feeding parts 4 and 4 becomes small. At this time, the operation of the actuator 30 can be detected by monitoring the resistance value between the power feeding units 4 and 4 as in the second embodiment.
  • the lead portion 6A is electrically connected to the bimetal even in a steady state, the lead portion of the metal resistor pattern 3 that contacts the bimetal 1 by the reversing operation is only one of the lead portions 6B.
  • the protruding portion 7 is provided in the lead-out portion 6B, poor contact between the lead-out portion and the bimetal hardly occurs, and contact reliability can be improved.
  • the bimetal 1 when the decrease in resistance value due to the reversal operation of the bimetal 1 is detected and the energization is stopped, the bimetal 1 returns to the steady state by natural cooling. By such an operation, the actuator 30 can be easily continuously driven.
  • FIG. 7 is a perspective view of an actuator 40 according to the fourth embodiment of the present invention.
  • the metal resistor pattern 3 has an extension 9 that is a portion that does not contribute to energization. Since the extension portion 9 is provided, the area of the pattern can be increased without reducing the resistance value of the metal resistor pattern 3, so that the reliability of adhesion with the bimetal 1 (insulating layer 2) can be improved.
  • FIG. 8 is a perspective view of an actuator 50 according to the fifth embodiment of the present invention.
  • FIG. 8A shows the actuator 50 in a steady state
  • FIG. 8B shows the actuator 50 in a bending operation.
  • the bimetal 1A is a slow action type bimetal.
  • a slow action type bimetal is used, a displacement proportional to the amount of current applied to the metal resistor pattern 3 can be obtained.
  • the present invention is not limited to the snap action type bimetal, and other types of bimetal can be applied to the movable body 5, and in any case, resistance to bending caused by the operation of the bimetal.
  • an actuator having a high heat generating element can be obtained.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

Afin de conférer à un actionneur, comprenant un élément générateur de chaleur, une haute résistance à la flexion associée au mouvement d'un bilame, l'actionneur (10) de la présente invention est pourvu d'un corps mobile (5) et d'une section d'alimentation (4) qui fournit de l'énergie au corps mobile (5). Le corps mobile (5) comprend le bilame (1), une couche isolante (2) formée sur une surface du bilame (1) et un motif de résistance métallique (3) qui lui est lié, la couche isolante (2) étant disposée entre eux. La section d'alimentation (4) fournit de l'énergie au motif de résistance métallique (3) dans un état dans lequel la section d'alimentation (4) est isolée du bilame (1).
PCT/JP2015/060309 2014-08-22 2015-04-01 Actionneur WO2016027496A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014169498 2014-08-22
JP2014-169498 2014-08-22

Publications (1)

Publication Number Publication Date
WO2016027496A1 true WO2016027496A1 (fr) 2016-02-25

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ID=55350453

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/060309 WO2016027496A1 (fr) 2014-08-22 2015-04-01 Actionneur

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WO (1) WO2016027496A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05144356A (ja) * 1991-11-21 1993-06-11 Matsushita Electric Works Ltd サーモスイツチ及びサーモスイツチ付きヒータ
WO2012070324A1 (fr) * 2010-11-26 2012-05-31 株式会社村田製作所 Actionneur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05144356A (ja) * 1991-11-21 1993-06-11 Matsushita Electric Works Ltd サーモスイツチ及びサーモスイツチ付きヒータ
WO2012070324A1 (fr) * 2010-11-26 2012-05-31 株式会社村田製作所 Actionneur

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