JP2015187963A - Airtight terminal having glass frit firing burned film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable enhancement of the tracking resistance of an airtight terminal and prevent occurrence of sealing glass and cracks of a sleeve which occur in a conventional airtight terminal.SOLUTION: An airtight terminal with an enamel sleeve has a metal outer ring 11, a penetration reed 12 penetrating through the metal outer ring, an insulation glass 13 for air-tightly sealing the metal outer ring and the reed, and an enamel sleeve 14 in which the reed is inserted and which is fixed to the insulating glass. The enamel sleeve comprises a metal sleeve having a glass frit burned film 16 provided thereon.

Description

  The present invention relates to a hermetic terminal used in an electric / electronic device, and more particularly to a hermetic terminal in which a metal sleeve or a metal outer ring inserted into a lead or a lead is provided with a glass frit fired film such as a flaw.

  An airtight terminal is a metal outer ring and a lead inserted through the metal ring, which are hermetically sealed with an insulating material. The airtight terminal supplies current to an electrical device or element housed in an airtight container, or signals from the electrical device or element. Is a terminal for wiring that leads out to the outside and is also called a hermetic seal. In particular, a GTMS (Glass-to-Metal-Seal) type hermetic terminal that seals a metal outer ring and a lead with insulating glass is used in, for example, a compressor of an air conditioner or a refrigerator, and the metal outer ring and a plurality of lead pins and glass. It consists of Soda barium glass or the like is mainly used as the glass, and has high airtightness, high withstand voltage, and high electrical insulation characteristics.

  In order to guarantee the tracking resistance between the metal outer ring of the airtight terminal and the lead, conventionally, as described in, for example, Patent Document 1, glass is projected in a conical shape from the lead insertion hole of the metal outer ring. Or by inserting a ceramic sleeve through the lead and further projecting the end of the tube from the sealing glass, or by attaching a ceramic sleeve to the inner lead of the sealed package as described in Patent Document 2. Furthermore, the top surface of the metal outer ring and a part of the outer lead are covered with epoxy resin or silicone rubber to increase the creepage distance as much as possible. In particular, the sleeve of the airtight terminal has been proposed in various shapes other than the cylindrical shape so that the creepage distance can be extended. As an example, Patent Document 3 discloses an airtight terminal equipped with a funnel-shaped insulating sleeve. In addition, although the airtight terminal applied to compressors, such as a refrigerator, was illustrated above for description of background art, this invention is not limited to the airtight terminal for compressors.

Japanese Utility Model Publication No. 63-008574 JP-A-57-027582 JP 07-326409 A

  In order to improve the reliability of the sealing glass, the hermetic terminal uses a difference in expansion coefficient between the metal and glass or ceramic to strongly tighten the glass sealing part and the ceramic sleeve fixing part with a metal outer ring. Often stops. For this reason, in the glass material and the sleeve material, a compressive force is applied between the inner side and the outer side of the metal outer ring, so that a large shearing force is generated during this time, and the glass material or the ceramic material is likely to be broken or cracked. There were drawbacks. In addition, a ceramic material has been exclusively used for the sleeve to be inserted into the lead, and since it is a sintered body, the surface has many irregularities and foreign substances are likely to adhere to it, which is not necessarily a preferable material from the viewpoint of tracking resistance. .

  The object of the present invention is to solve the above-mentioned problems, and improves the tracking resistance of the hermetic terminal, and at the same time, generates cracks in the sealing glass and ceramic sleeve that have occurred in the conventional hermetic terminal. There is to solve.

  According to the present invention, the metal outer ring, the through lead inserted through the metal outer ring, the insulating glass in which the metal outer ring and the lead are hermetically sealed, and the lead inserted into the lead and fixed to the insulating glass. An airtight terminal with a heel sleeve is provided, wherein the heel sleeve is made of a metal sleeve having a glass frit fired film on the surface. This airtight terminal sleeve has a metal base and part or all of the surface of the metal base covered with a fired coating of insulating glass frit to prevent cracks that have occurred in conventional ceramic sleeves. To do. The scissor sleeve, which is inserted by protruding from the metal outer ring in the axial direction of the lead, has a smooth surface and is hardly contaminated by foreign matter, and can keep the tracking resistance of the airtight terminal stably for a long period of time and improve the robustness. Since this saddle sleeve uses a metal base, it is easier to form compared to a conventional ceramic sleeve, etc., it is easy to form a complicated shape or bend, and can be formed into a thin one. Further, it is not necessary to insulate the metal outer ring and the lead with a resin or rubber material, and a resin or rubber insert molding step is not necessary, which is preferable from the viewpoint of simplification of the steps and constituent materials.

  According to another aspect of the present invention, the metal outer ring includes a metal outer ring, a through lead inserted into the metal outer ring, and an insulating glass in which the metal outer ring and the lead are hermetically sealed. There is provided a drawn airtight terminal characterized in that a glass frit fired film such as a flaw is applied to the surface. This metal outer ring of the hermetic terminal is covered with an insulating glass frit fired film, except for the welding allowance when the hermetic terminal is attached to a sealed container, etc. Improves tracking resistance of terminals.

  Each of the airtight terminal leads having the glass frit fired film of the present invention is provided with a glass frit fired film on the peripheral wall surface of the lead so that the ridges protrude in the axial direction of the lead from the end face of the metal outer ring as necessary. May be. By providing a glass frit fired film on the peripheral wall surface of the lead, the coating area of the insulating film, which is resistant to breakage, can be expanded, and the creeping distance between the outer metal ring and the lead can be further increased to improve the tracking resistance.

  In the airtight terminal with the collar sleeve of the present invention, when iron or an iron alloy is used for the metal base of the collar sleeve, no thermal stress is generated between the outer metal ring and the shear force that causes breakage in the sleeve body does not occur. There are advantages. The scissors sleeve, including the glass frit fired film, has sufficient toughness and ductility and is excellent in mechanical strength, so that it is not easily broken even if a large force is applied. Further, since the metal base is easy to mold, it can be easily formed into a complicated shape having a long creepage distance, or can be much thinner and lighter than a conventional ceramic sleeve. In addition, since the heel sleeve is coated with a glass frit fired film, it has an extremely smooth glass surface, has little adhesion of foreign matter, and has excellent tracking resistance.

  The pulling hermetic terminal of the present invention realizes a smooth metal outer ring to which foreign matter or the like is difficult to adhere without mounting a sleeve, and improves the tracking resistance of the hermetic terminal. Further, since the sleeve is not used, the man-hour burden is reduced and the material can be reduced.

The airtight terminal 10 with a collar sleeve which concerns on this invention is shown, (a) is a top view, (b) shows front sectional drawing cut | disconnected along the DD line | wire of (a). The airtight terminal 20 with a collar sleeve which concerns on this invention is shown, (a) is a top view, (b) shows front sectional drawing cut | disconnected along the DD line | wire of (a). The airtight terminal 30 with a collar sleeve which concerns on this invention is shown, (a) is a top view, (b) is a front fragmentary sectional view which cut | disconnected a part along the DD line of (a), (c). Shows a bottom view. The pulling airtight terminal 40 which concerns on this invention is shown, (a) is a top view, (b) shows front sectional drawing cut | disconnected along the DD line | wire of (a). 1 shows a pulling and airtight terminal 50 according to the present invention, wherein (a) is a plan view, (b) is a front partial sectional view cut along a line DD in (a), and (c) is a front view. A bottom view is shown.

  Hereinafter, the hermetic terminal of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, an airtight terminal 10 with a saddle sleeve according to the present invention includes an iron or iron alloy metal outer ring 11, a lead 12 inserted through the metal outer ring 11, and a metal outer ring 11 and a lead 12. Insulating glass 13 sealed to the lead 12 and a gutter sleeve 14 inserted into the lead 12 and fixed to the insulating glass 13, and the gutter sleeve 14 is provided with a glass frit fired film 16 on the surface of the metal base 15. And The scissors sleeve 14 is formed by covering a cylindrical metal base 15 provided with a crease on a peripheral wall and serving as a creepage distance extending means 17 with a glass frit fired film 16. It is fixed to the outer ring 11 and the lead 12. In the example of FIG. 1, the glass frit fired film 16 is provided on the entire surface of the metal base 15. However, the glass frit fired film 16 applied to the metal base 15 is only partly exposed on the exposed surface of the sleeve when assembled into an airtight terminal. May be applied automatically. The saddle sleeve 14 provided with the creeping distance extending means 17 such as a fold can increase the surface area of the metal base 15 and thus functions as a cooling fin. Although not shown, if necessary, the surface of the lead 12 may be provided with a glass frit fired film on a desired peripheral wall so that the ridge protrudes from the through hole of the metal outer ring 11 in the axial direction of the lead 12. Good. Further, instead of the saddle sleeve 14 attached to the lead 12, the peripheral wall surface of the lead itself may be processed into a pleat shape or a step shape, and a glass frit fired film may be provided thereon to serve as a creeping distance extending means.

  As shown in FIG. 2, the hermetic terminal 20 with the saddle sleeve according to the present invention has an iron or iron alloy metal outer ring 21, a lead 22 inserted through the metal outer ring 21, and the metal outer ring 21 and the lead 22. And an insulating glass 23 that is inserted into the lead 22 and fixed to the insulating glass 23, and the insulating sleeve 24 is provided with a glass frit fired film 26 on the surface of the metal base 25. And The scissor sleeve 24 is formed by covering a funnel-shaped metal base 25 having a creeping distance extending means 27 processed into a stepped shape with a glass frit fired film 26, inserted into a lead 22, and insulated with an insulating glass 23 to form a metal outer ring. 21 and the lead 22 are fixed. In the example of FIG. 2, the glass frit fired film 26 is provided on the entire surface of the metal base 25, but the glass frit fired film 26 applied to the metal base 25 is only partly exposed on the exposed surface of the sleeve when assembled into an airtight terminal. May be applied automatically. Although not shown, if necessary, the surface of the lead 22 may be provided with a glass frit fired film on a desired peripheral wall surface so that the flange protrudes from the through hole of the metal outer ring 21 in the axial direction of the lead 22. Good. Further, the surface of the lead 22 on which the glass frit fired film is applied may be processed into a pleat shape or a step shape in advance to serve as a creeping distance extending means.

  As shown in FIG. 3, the airtight terminal 30 with the collar sleeve according to the present invention is inserted into a metal outer ring 31 of iron or iron alloy having a plurality of through holes and a flange on the peripheral wall, and the through hole of the metal outer ring 31. A plurality of leads 32, an insulating glass 33 in which the metal outer ring 31 and the leads 32 are hermetically sealed, and a flange sleeve 34 inserted into the leads 32 and fixed to the insulating glass 33 are provided. A glass frit fired film 36 is provided on the surface of the base 35. The saddle sleeve 34 is formed by coating a funnel-shaped metal base 35 with a reduced thickness for weight reduction with a glass frit fired film 36, inserted into a lead 32, and insulated with the metal outer ring 31 with an insulating glass 33. It is fixed to the lead 32. In the example of FIG. 3, the glass frit fired film 36 is provided on the entire surface of the metal base 35. However, the glass frit fired film 36 applied to the metal base 35 is partially only on the exposed surface of the sleeve when assembled into an airtight terminal. A glass frit fired film 36 may be applied to the substrate. Although not shown, a glass frit fired film may be provided on a desired peripheral wall surface of the surface of the lead 32 as necessary so that the ridges protrude from the through hole in the axial direction of the lead 32. Furthermore, the surface of the lead 32 on which the glass frit fired film 36 is applied may be processed into a pleat shape or a step shape in advance to serve as a creeping distance extending means.

  As shown in FIG. 4, the pulling airtight terminal 40 according to the present invention airtightly connects an iron or iron alloy metal outer ring 41, a lead 42 inserted through the metal outer ring 41, and the metal outer ring 41 and the lead 42. The metal outer ring 41 and the lead 42 are provided with a glass frit fired film 46 such as a flaw on a desired surface. The metal outer ring 41 covers the periphery of the through hole with the glass frit fired film 46 on both the upper and lower surfaces, and the lead 42 is provided with a glass frit fired film 46 so that the flange protrudes from the through hole in the vertical axis direction. The metal outer ring 41 and the lead 42 are sealed with the glass 43. In the example of FIG. 4, the glass frit fired film 46 is provided on the upper and lower surfaces of the metal outer ring 41 and the lead 42. However, the glass frit fired film 46 applied to the metal outer ring 41 and the lead 42 is any one as necessary. It is good also as only one side. Further, although not shown, the surface of the metal outer ring 41 or the lead 42 on which the glass frit fired film 46 is applied may be processed in advance into a pleat shape or a step shape as a creeping distance extending means.

  As shown in FIG. 5, the lead-tight airtight terminal 50 according to the present invention includes a plurality of through-holes and a metal outer ring 51 made of iron or iron alloy having a flange on the peripheral wall, and a plurality of through-holes inserted in the metal outer ring 51. And an insulating glass 53 in which the metal outer ring 51 and the lead 52 are hermetically sealed. The metal outer ring 51 is provided with a glass frit fired film 56 such as a flaw on a desired surface. And In the example of FIG. 5, the glass frit fired film 56 is partially provided only on the lower surface side of the metal outer ring 51, but the surface except for the welding allowance and the lead 52 when attaching this hermetic terminal to a sealed container or the like. The whole may be covered with the glass frit fired film 56. Although not shown, if necessary, a glass frit fired film 56 may be provided on a desired peripheral wall surface of the lead 52 on the lower surface side so that wrinkles protrude from the through hole in the axial direction of the lead 52 as shown in FIG. Further, the metal outer ring 51 and the base surface of the lead 52 to which the glass frit fired film 56 has been applied may be processed in advance into a pleat shape or a step shape to serve as a creeping distance extending means.

  The present invention can be applied to an airtight terminal for a compressor such as an air conditioner or a refrigerator, and an airtight terminal for a power source including various power devices and secondary batteries. In addition, it can be used for airtight terminals that can withstand high voltages and currents and that require withstand voltage and tracking resistance.

10, 20, 30 ... Airtight terminal with heel sleeve,
40, 50 ... pulling airtight terminal,
11, 21, 31, 41, 51 ... metal outer ring,
12, 22, 32, 42, 52 ... lead,
13, 23, 33, 43, 53 ... insulating glass,
14, 24, 34 ... collar sleeve,
15, 25, 35 ... Metal base,
16, 26, 36, 46, 56 .. glass frit fired film,
17, 27 ... Creepage distance extending means.

Claims (6)

  A metal outer ring, a lead inserted through the metal outer ring, an insulating glass hermetically sealed with the metal outer ring and the lead, and a gutter sleeve inserted into the lead and fixed to the insulating glass. An airtight terminal with a collar sleeve, wherein the collar sleeve is provided with a glass frit fired film on the surface of a metal base.   A metal outer ring, a lead inserted into the metal outer ring, and an insulating glass in which the metal outer ring and the lead are hermetically sealed. The metal outer ring has a glass frit such as a flaw on a desired surface. A tow-tight airtight terminal characterized by having a fired film.   2. The airtight terminal with a collar sleeve according to claim 1, wherein the collar sleeve is provided with creeping distance extending means whose surface is processed into a pleated shape or a stepped shape.   The said metal outer ring was provided with the creeping distance expansion means which processed the base surface which gave the said glass frit baking film | membrane into the shape of a pleat or step shape etc., The pulling airtight terminal of Claim 2 characterized by the above-mentioned.   2. The rivet according to claim 1, wherein the lead is provided with the glass frit fired film on a desired peripheral wall such that the ridge protrudes from the through hole of the outer metal ring in the axial direction of the lead. An airtight terminal with a sleeve or a pulling airtight terminal according to claim 2. 6. The airtight terminal with a scissors sleeve or a pulling airtight terminal according to claim 5, wherein the lead is provided with creeping distance extending means whose surface is processed into a pleat shape or a step shape.

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