WO2023063109A1 - 気密端子および圧縮機 - Google Patents

気密端子および圧縮機 Download PDF

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Publication number
WO2023063109A1
WO2023063109A1 PCT/JP2022/036670 JP2022036670W WO2023063109A1 WO 2023063109 A1 WO2023063109 A1 WO 2023063109A1 JP 2022036670 W JP2022036670 W JP 2022036670W WO 2023063109 A1 WO2023063109 A1 WO 2023063109A1
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WO
WIPO (PCT)
Prior art keywords
airtight terminal
insulating member
groove
terminal according
shape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/036670
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English (en)
French (fr)
Japanese (ja)
Inventor
裕貴 川端
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
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Kyocera Corp
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 Kyocera Corp filed Critical Kyocera Corp
Priority to JP2023555113A priority Critical patent/JP7701985B2/ja
Publication of WO2023063109A1 publication Critical patent/WO2023063109A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case

Definitions

  • the present disclosure relates to airtight terminals and compressors.
  • the airtight terminals used in refrigerant compressors (compressors) for refrigerators and air conditioners are required to have high withstand voltage and withstand voltage because the compressor is placed inside a pressure-resistant container filled with refrigerant.
  • a circular top plate portion a tubular portion extending downward from the outer peripheral end of the top plate portion, a flange portion extending from the lower end of the tubular portion, and an inner side from the top plate portion a metal outer ring provided with a small cylindrical portion extending along the length of the metal ring and having a lead sealing hole formed therein; a lead sealed in the lead sealing hole of the metal outer ring via a sealing glass; and an insulating sleeve welded to the sealing glass on the inner surface side of the ring so that the insulating sleeve extends beyond the small tubular portion in parallel with the top plate portion to the sealing glass on the inner surface side of the metal outer ring.
  • a hermetic terminal for a compressor has been proposed which is welded to the .
  • An airtight terminal includes a disk-shaped or cylindrical insulating member including a plurality of conductive pins and a plurality of through holes for individually inserting the conductive pins in the thickness direction, and surrounding the insulating member. It comprises an annular member and a plurality of brazing portions each fixing a conductive pin to one of the main surfaces of the insulating member.
  • the main surface of the insulating member on the side having the brazed portion is provided with grooves that respectively partition the brazed portions.
  • the shape of the groove is U-shaped, V-shaped or isosceles trapezoidal.
  • a compressor according to the present disclosure includes a casing housing a motor for compressing refrigerant, and the airtight terminal attached to the casing. Power is supplied to the motor from an external power supply through the conduction pins.
  • FIG. 3 is a plan view of a non-limiting embodiment of a hermetic terminal of the present disclosure
  • FIG. 2 is a plan view of the airtight terminal shown in FIG. 1 as viewed from the main surface of the brazed portion
  • FIG. 3 is a cross-sectional view of the airtight terminal shown in FIGS. 1 and 2 taken along line III-III. It is an example of the groove in the airtight terminal shown in FIG. 2, and is a cross-sectional view of a U-shaped groove.
  • FIG. 3 is an example of a groove in the airtight terminal shown in FIG. 2 and is a cross-sectional view of a V-shaped groove. It is an example of the groove
  • FIG. 2 shows the profile of the groove shown in FIG. 7A
  • FIG. 3 is a plan view of an airtight terminal according to a non-limiting embodiment of the present disclosure, viewed from the main surface on the side including a brazing portion, and is a view corresponding to FIG. 2
  • 1 is a schematic diagram of a compressor according to a non-limiting embodiment of the present disclosure
  • the present disclosure provides an airtight terminal and a compressor in which dielectric breakdown is less likely to occur.
  • the airtight terminal and compressor according to the present disclosure are less prone to dielectric breakdown.
  • Airtight terminals according to non-limiting embodiments of the present disclosure will be described in detail with reference to the drawings.
  • the hermetic terminal may comprise any components not shown in the referenced figures.
  • the dimensions of the members in each drawing do not faithfully represent the actual dimensions of the constituent members, the dimensional ratios of the respective members, and the like.
  • the airtight terminal 1 comprises a conducting pin 2, an insulating member 3, an annular member 4 and a brazing portion 5.
  • This airtight terminal 1 can be used, for example, in a compressor or the like.
  • each component of the airtight terminal 1 will be described in order, taking as an example the case where the airtight terminal 1 is for a compressor.
  • the conductive pin 2 is conductive and can function as a conductive path for inputting and outputting electric signals to and from the pressure container to which the airtight terminal 1 is attached.
  • Examples of the material of the conductive pin 2 include oxygen-free copper, tough pitch copper, copper such as phosphorus-deoxidized copper, titanium, nickel, austenitic stainless steel (eg, SUS304), and Cu—Ni alloy (eg, cupronickel). , Fe—Co alloys, Fe—Co—C alloys, Fe—Ni alloys, and Fe—Ni—Co alloys.
  • the shape of the conducting pin 2 may be cylindrical or polygonal.
  • the number of conductive pins 2 is plural.
  • the number of conductive pins 2 may be 2 or more and 50 or less.
  • the insulating member 3 has insulating properties and can hold the conductive pin 2 while electrically insulating it.
  • Examples of the material of the insulating member 3 include electrical insulating materials such as sintered aluminum oxide.
  • the insulating member 3 is disc-shaped or cylindrical.
  • the example insulating member 3 shown in FIG. 3 is cylindrical. More specifically, the insulating member 3 of the example shown in FIG. 3 has a columnar shape extending along the axis S. The axis S passes through the respective centers of the two main surfaces 32 and 33 of the insulating member 3 .
  • the insulating member 3 is not limited to a specific size.
  • the outer diameter D of the insulating member 3 may be set to approximately 20 mm or more and 30 mm or less.
  • the length L of the insulating member 3 in the axial center S direction may be set to approximately 14.5 mm or more and 24.5 mm or less.
  • the insulating member 3 has a plurality of through holes 31 in the thickness direction for inserting the conduction pins 2 individually.
  • the thickness direction may mean the axial center S direction.
  • the through hole 31 may penetrate the insulating member 3 in the thickness direction.
  • the number of through holes 31 may be the same as the number of conduction pins 2 .
  • the plurality of through holes 31 may be positioned at regular intervals along the circumferential direction of the insulating member 3 .
  • the three through-holes 31 may be positioned so as to have 120° rotational symmetry with the axis S of the insulating member 3 as a reference.
  • the conductive pin 2 is inserted into the through hole 31 with both ends projected.
  • electricity is generated between the devices inside and outside the pressure vessel.
  • the airtight terminal 1 can function as a terminal for transmitting signals.
  • the annular member 4 can function as an attachment portion for attaching the airtight terminal 1 to the pressure-resistant container. Therefore, the airtight terminal 1 may be attached to the pressure container via the annular member 4 .
  • the annular member 4 surrounds the insulating member 3 . More specifically, the annular member 4 surrounds at least part of the insulating member 3 .
  • the annular shape of the annular member 4 is not limited to an annular shape, but is a concept that includes an annular or tubular shape as long as the insulating member 3 can be surrounded. Therefore, the shape of the annular member 4 is not limited to an annular shape, and may be annular or tubular. For example, as in the example shown in FIG. 3, the shape of the annular member 4 may be cylindrical. Moreover, the outer diameter of the annular member 4 may be constant.
  • the material of the annular member 4 may be metal, for example.
  • metals include carbon steel for machine structural use such as S25C, rolled steel for general structural use (cold rolled steel) such as SS400, and Fe--Ni--Co alloys.
  • the brazing portion 5 is a portion for fixing the plurality of conduction pins 2 to one of the main surfaces of the insulating member 3 .
  • the brazing portion 5 may fix the plurality of conduction pins 2 to the main surface 32 or the convex surface 341 (top surface) of the convex portion 34 provided on the main surface 32, for example.
  • Examples of the brazing material include silver solder (eg, Bag-8 and Bag-9).
  • the brazing part 5 is plural.
  • the number of brazing portions 5 may be the same as the number of conducting pins 2 .
  • a plurality of brazed portions 5 are positioned apart from each other.
  • brazing portions 5 When the number of brazing portions 5 is three, as in the example shown in FIG.
  • the brazed portion 53 may be used. These points are the same for the conduction pin 2 and the through hole 31 as well.
  • the main surface 32 on the side with the brazing portion 5 is provided with grooves 321 that partition the brazing portions 5 respectively.
  • the groove 321 includes a U-shaped groove (hereinafter, a U-shaped groove is referred to as a U groove) 322, a V-shaped groove (hereinafter, a V-shaped groove). is called a V groove) 323 or an isosceles trapezoidal groove (hereinafter, an isosceles trapezoidal groove is called an isosceles trapezoidal groove) 324 .
  • the main surface 32 on the side having the brazing portion 5 is provided with the grooves 321 that partition the brazing portions 5 respectively, the creepage distance between the adjacent conduction pins 2 is increased, thereby suppressing the risk of dielectric breakdown. can be done.
  • the grooves 321 are U grooves 322, V grooves 323, or isosceles trapezoidal grooves 324, when the insulating member 3 is formed by uniaxial press molding, cold isostatic pressing (CIP) molding, or the like. Since demolding becomes easier than when the groove 321 is rectangular, microcracks are less likely to occur around the bottom surface 321a of the groove 321. Therefore, the hermetic terminal 1 can be used for a long period of time even if the temperature is repeatedly lowered and raised.
  • the U-groove 322 may mean a U-shaped groove in a cross section perpendicular to the direction in which the groove 321 extends.
  • the V-groove 323 may mean a V-shaped groove in a cross section perpendicular to the direction in which the groove 321 extends.
  • the isosceles trapezoidal groove 324 may have an opening width larger than the width of the bottom surface 321a in a cross section perpendicular to the direction in which the groove 321 extends. It should be noted that the U groove 322 does not have to be strictly U-shaped, and may include a slight curve or the like as long as the effect is obtained. This point also applies to the V groove 323 and the isosceles trapezoidal groove 324 .
  • the groove 321 is not limited to a specific size.
  • the width of the opening of the groove 321 in the direction orthogonal to the extending direction of the groove 321 may be set to approximately 0.5 mm or more and 2 mm or less.
  • the depth of the groove 321 may be set to approximately 0.5 mm or more and 2 mm or less.
  • the groove 321 has an isosceles trapezoidal shape, and the bottom surface 321 a of the groove 321 extends in the depth direction of the groove 321 from the main surface 32 side on which the brazing portion 5 is provided toward the bottom surface 321 a side. It may be convexly curved.
  • the creepage distance between the adjacent conduction pins 2 becomes longer than in the case of the isosceles trapezoid in which the bottom surface 321a is a flat surface, which may cause dielectric breakdown. The effect of suppressing is further enhanced.
  • the radius of curvature of the bottom surface 321a is preferably 300 ⁇ m or more and 350 ⁇ m or less.
  • the radius of curvature of the bottom surface 321a is 300 ⁇ m or more, the curvature of the bottom surface 321a becomes small, and the occurrence of cracks starting from the bottom surface 321a can be suppressed.
  • the radius of curvature of the bottom surface 321a is 350 ⁇ m or less, the groove 321 becomes deeper, and the effect of suppressing the risk of dielectric breakdown is further enhanced.
  • FIG. 7B is a diagram showing an example of the groove profile shown in FIG. 7A, and the curvature of the bottom surface 321a is 319 ⁇ m.
  • the profile of the groove 321 can be measured using a shape analysis laser microscope ("VK-X1100" manufactured by Keyence Corporation or its successor model).
  • the profile of the groove 321 includes the width of the opening of the groove 321, the depth of the groove 321, the radius of curvature of the bottom surface 321a of the groove 321, the shortest length along the surface of the groove 321, and the like.
  • the illumination method is coaxial epi-illumination, the magnification is 120 times, and the range including the groove 321 is set to, for example, 2781 ⁇ m (longitudinal direction of the groove 321) ⁇ 2090 ⁇ m per point, and three points are selected. Then, a line perpendicular to the longitudinal direction of the groove 321 is drawn, and profile measurement is performed using this line as a measurement target.
  • the bottom surface 321a of the groove 321 represents the difference in cut level (R ⁇ c ) may be 1 ⁇ m or more and 2.2 ⁇ m or less, or may be 1.3 ⁇ m or more and 2.2 ⁇ m or less.
  • the average value of the cutting level difference (R ⁇ c) of the bottom surface 321a of the groove 321 is equal to or greater than the above lower limit, the contact angle with respect to pure water is small. Therefore, when the dirt adhering to the bottom surface 321a is washed with pure water, the dirt can be easily removed.
  • the average value of the cut level difference (R ⁇ c) of the bottom surface 321a of the groove 321 is equal to or less than the upper limit value described above, the surface properties are good, so large shedding is less likely to occur, and such shedding occurred. Even so, it is less likely to float or scatter and have an adverse effect.
  • the bottom surface 321a of the groove 321 is, for example, a ground surface or a fired surface.
  • the ratio R2/R1 of the average value R2 of the average length (RSm) to the average value R1 of the arithmetic average roughness (Ra) in the roughness curve may be 5 or more.
  • the average length (RSm) represents the average period of unevenness on the surface to be measured.
  • the ratio R2/R1 increases, the average period of the irregularities on the surface to be measured becomes longer and the average depth of the recesses of the irregularities becomes shallower.
  • the ratio R2/R1 is 5 or more, the occurrence of microcracks can be suppressed even if the temperature is repeatedly increased and decreased, because the bottom surface 321a has few deep recesses.
  • the ratio R2/R1 may be 30 or less.
  • the average value of the cutting level difference (R ⁇ c) of the main surface 32 on the side where the brazing portion 5 is provided may be 1 ⁇ m or more and 2.2 ⁇ m or less, or may be 1 ⁇ m or more and 1.9 ⁇ m or less.
  • the contact angle with respect to pure water is small. Therefore, when the dirt adhering to the main surface 32 is washed with pure water, the dirt can be easily removed.
  • the average value of the cutting level difference (R ⁇ c) of the main surface 32 is equal to or less than the upper limit value described above, the surface properties are good, so large grain shedding is less likely to occur, and even if such shedding occurs. , it is less likely to float or scatter and cause adverse effects.
  • the main surface 32 is, for example, a fired surface.
  • the cutting level difference (R ⁇ c), the arithmetic mean roughness (Ra) and the mean length (RSm) are, for example, based on JIS B 0601: 2001, and are measured at approximately equal intervals in each of the three measurement ranges as follows. Four target lines may be drawn, line roughness may be measured, and an average value of 12 measured values may be calculated. For example, the measurement conditions may be set as follows.
  • Measuring machine Shape analysis laser microscope ("VK-X1100" manufactured by Keyence Corporation or its successor model) Illumination: Coaxial epi-illumination Cutoff value ⁇ s: None Cutoff value ⁇ c: 0.08 mm Cutoff value ⁇ f: None End effect correction: Yes Measurement magnification: 240 times (10 ⁇ 24) Measurement points: 3 points each on bottom surface 321a of groove 321 and main surface 32 Measurement range: 1428 ⁇ m ⁇ 1071 ⁇ m/point Length of line to be measured: 1280 ⁇ m/line
  • the grooves 321 may be radially provided from the axis S of the insulating member 3 toward the outer periphery. In this case, dirt is easily discharged from the shaft center S toward the outer periphery during cleaning. Note that the groove 321 may reach the outer circumference of the insulating member 3 .
  • the grooves 321 may be provided in a honeycomb shape.
  • An airtight terminal 1' shown in FIG. 8 has grooves 321 in a honeycomb shape. In this case, the degree of freedom in arranging the conduction pins 2 is increased.
  • the honeycomb shape may mean that the grooves 321 are composed of a plurality of polygons in plan view. Polygons may include, for example, hexagons, octagons, and the like. Note that the grooves 321 may be provided so as to surround the brazing portions 5 respectively.
  • the shape of the groove 321 in plan view may be linear.
  • the shape of the groove 321 in plan view is not limited to a straight line.
  • the shape of the groove 321 in plan view may be, for example, a curved shape, or a shape combining a straight line shape and a curved shape.
  • the shape of the grooves 321 may be zigzag, serpentine, pectinate, or wavy. These shapes may have an irregular or regular pattern.
  • the main surface 32 with the brazing portion 5 may be located on the high pressure side A1 and the other main surface 33 without the brazing portion 5 may be on the low pressure side. It may be located at A2.
  • the high pressure side A1 may mean the side with relatively high pressure
  • the low pressure side A2 may mean the side with relatively low pressure.
  • the main surface 32 on the side with the brazing portion 5 may be located at a place where the pressure is higher than the other main surface 33 .
  • the main surface 32 on the side where the brazing portion 5 is provided may be positioned inside the pressure container, and the other main surface 33 may be positioned inside the pressure container. may be located outside the
  • the position of the main surface 32 on the side where the brazed portion 5 is provided is not limited to the high pressure side A1, and may be the low pressure side A2.
  • an airtight terminal in which the main surface 32 is provided with grooves 321 has been described as an example, but instead of the grooves 321, the main surface 32 has linear protrusions (not not), and the shape of this protrusion may be U-shaped, V-shaped or isosceles trapezoidal.
  • These shapes of the protrusions are shapes in a cross section perpendicular to the extending direction of the protrusions (longitudinal direction of the protrusions).
  • the insulating member 3 is formed by uniaxial press molding, cold isostatic pressing (CIP) molding, or the like. In this case, demolding becomes easier than when the projection is rectangular, so microcracks are less likely to occur around the top surface of the projection. Therefore, even if the temperature is repeatedly lowered and raised, the airtight terminal can be used for a long period of time.
  • CIP cold isostatic pressing
  • the isosceles trapezoidal protrusion may have a width that intersects the main surface greater than the width of the top surface in a cross section perpendicular to the extending direction of the protrusion. It should be noted that the U-shaped protrusion does not have to be strictly U-shaped, and may include a slight curve or the like as long as the effect is obtained. This point is the same for the V-shaped protrusion and the isosceles trapezoidal protrusion.
  • the projection is not limited to a specific size.
  • the width of the projection that intersects the main surface may be set to approximately 0.5 mm or more and 2 mm or less.
  • the height of the protrusion may be set to approximately 0.5 mm or more and 2 mm or less.
  • the protrusion has an isosceles trapezoidal shape, and the top surface of the protrusion is convexly curved in the height direction of the protrusion from the main surface 32 side on which the brazing portion 5 is provided toward the top surface side of the protrusion. You may have
  • the creepage distance between the adjacent conduction pins 2 is longer than in the case of the isosceles trapezoid with the top surface being flat, so there is a risk of dielectric breakdown. The effect of suppressing is further enhanced.
  • the radius of curvature of the top surface is preferably 300 ⁇ m or more and 350 ⁇ m or less.
  • the radius of curvature of the top surface is 300 ⁇ m or more, the curvature of the top surface becomes small, and the occurrence of cracks originating from the top surface can be suppressed.
  • the radius of curvature of the top surface is 350 ⁇ m or less, the height of the protrusions is increased, and the effect of suppressing the risk of dielectric breakdown is further enhanced.
  • the top surface of the protrusions is the cut level difference (R ⁇ c ) may be 1 ⁇ m or more and 2.2 ⁇ m or less, or may be 1.3 ⁇ m or more and 2.2 ⁇ m or less.
  • the contact angle with respect to pure water is small. Therefore, when the dirt adhering to the top surface is washed with pure water, the dirt can be easily removed. Further, when the average value of the cutting level difference (R ⁇ c) of the top surface of the protrusion is equal to or less than the upper limit value described above, the surface properties are good, so large shedding is less likely to occur, and such shedding occurred. Even so, it is less likely to float or scatter and have an adverse effect.
  • the top surface of the protrusion is, for example, a polished surface, a ground surface, or a fired surface.
  • the ratio R4/R3 of the average value R4 of the average length (RSm) to the average value R3 of the arithmetic average roughness (Ra) in the roughness curve may be 5 or more.
  • the ratio R4/R3 may be 30 or less.
  • the measurement conditions for the cutting level difference (R ⁇ c), the arithmetic mean roughness (Ra) and the average length (RSm) of the top surface of the protrusion are the same as the measurement conditions described above except that the bottom surface 321a is replaced with the top surface of the protrusion. is.
  • the protrusions may be radially provided from the axis S of the insulating member 3 toward the outer circumference.
  • the protrusion may be provided in a honeycomb shape.
  • the compressor 100 comprises a casing 101 (pressure-resistant container) and an airtight terminal 1.
  • a casing 101 houses a motor 102 for compressing refrigerant.
  • the airtight terminal 1 is attached to the casing 101 .
  • Power from an external power supply 103 is supplied to the motor 102 via the conduction pins 2 .
  • the compressor 100 is provided with the airtight terminal 1 in which dielectric breakdown is unlikely to occur, so stable operation is possible over a long period of time.
  • the airtight terminal 1 may be attached to the casing 101 by welding, for example.
  • Motor 102 may be, for example, a three-phase motor.
  • the external power supply 103 may be, for example, a three-phase AC power supply. Motor 102 and external power supply 103 may be electrically connected to conductive pins 2 via wiring 104 .
  • the compressor 100 may comprise a compression mechanism 105, a suction pipe 106 and a discharge pipe 107.
  • Compression mechanism 105 is housed in casing 101 .
  • Suction tube 106 and discharge tube 107 are attached to casing 101 .
  • Suction tube 106 and discharge tube 107 may be attached to casing 101 by welding, for example.
  • the compression mechanism 105 is driven by the motor 102 and compresses the refrigerant.
  • Suction tube 106 delivers refrigerant to compression mechanism 105 .
  • the discharge pipe 107 discharges the refrigerant compressed by the compression mechanism 105 and sends it out to the refrigerant circulation system.
  • the compressor 100 When the compressor 100 includes the compression mechanism 105, the suction pipe 106, and the discharge pipe 107, power is supplied from the external power supply 103 to the motor 102 through the airtight terminal 1, and the motor 102 is driven to operate the compression mechanism.
  • 105 is enabled to compress the refrigerant. Refrigerant flows from the suction pipe 106 into the compression mechanism 105, and the compressed refrigerant flows out from the discharge pipe 107 and is sent to the refrigerant circulation system.
  • the airtight terminal 1 is for a compressor used in a refrigerator, but the airtight terminal 1 can also be applied to other uses.
  • Other uses include, for example, sensor units, aluminum electrolytic capacitors, contact devices for relays, medical equipment, storage devices, and compressors driven by electric motors used in hybrid and electric vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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PCT/JP2022/036670 2021-10-15 2022-09-30 気密端子および圧縮機 Ceased WO2023063109A1 (ja)

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JP2021169326 2021-10-15
JP2021-169326 2021-10-15

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10265927A (ja) * 1997-03-26 1998-10-06 Miyota Co Ltd Ｐｂメッキ気密端子の製造方法
JP2005216641A (ja) * 2004-01-29 2005-08-11 Kyocera Corp 気密端子
JP2020089159A (ja) * 2018-11-29 2020-06-04 株式会社東芝 電気配線貫通装置およびその製造方法
WO2021193107A1 (ja) * 2020-03-27 2021-09-30 日立Astemo株式会社 シリンダ装置とピストンロッドの製造方法
JP2021159996A (ja) * 2020-03-31 2021-10-11 京セラ株式会社 光透過窓接合体

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10265927A (ja) * 1997-03-26 1998-10-06 Miyota Co Ltd Ｐｂメッキ気密端子の製造方法
JP2005216641A (ja) * 2004-01-29 2005-08-11 Kyocera Corp 気密端子
JP2020089159A (ja) * 2018-11-29 2020-06-04 株式会社東芝 電気配線貫通装置およびその製造方法
WO2021193107A1 (ja) * 2020-03-27 2021-09-30 日立Astemo株式会社 シリンダ装置とピストンロッドの製造方法
JP2021159996A (ja) * 2020-03-31 2021-10-11 京セラ株式会社 光透過窓接合体

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