# US 11,309,128 B2 · Capacitor with seat plate

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- Number: US 11,309,128 B2
- Document ID: US11309128B2
- Status: Granted
- Kind: B2
- Application number: 17/011,033
- Filed: 2020-09-03
- Published: 2020-12-24
- Granted: 2022-04-19
- Earliest claimed: 2018-03-28
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Yoshiaki Ishimaru
- Web page: https://patentgrep.com/patent/US11309128B2

## CPC

- H01G 2/02: Mountings
- H01G 9/10: Sealing, e.g. of lead-in wires
- H05K 3/3426: {characterised by the leads}
- H01G 9/08: Housing; Encapsulation
- H05K 2201/10015: Non-printed capacitor
- H05K 2201/10606: Permanent holder for component or auxiliary printed circuits mounted on a printed circuit board [PCB]
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A seat-plate-mounted capacitor includes a capacitor body and a seat plate. The capacitor body includes a case and a sealing member. The case includes a tubular part and a bottom wall that closes a first end of the tubular part. The sealing member closes a second end of the tubular part that is opposite to the first end. The capacitor body is disposed so that the sealing member is adjacent to the seat plate. The seat plate includes a base part and a support wall. The tubular part has an annular recess surrounding the tubular part, a first maximum diameter portion disposed closer to the bottom wall than the annular recess is, and a second maximum diameter portion disposed closer to the second end than the annular recess is. A diameter A of the first maximum diameter portion, a diameter B of the second maximum diameter portion, and an inner diameter C of the support wall satisfy a relation A>C>B, in a state that the capacitor body is not installed in the seat plate.

## Claims

### Claim 1

A seat-plate-mounted capacitor comprising:
a capacitor body; and
a seat plate in which the capacitor body is installed, wherein:
the capacitor body includes:
a case including a tubular part having a cylindrical shape and a bottom wall closing a first end of the tubular part; and
a sealing member closing a second end of the tubular part, the second end being opposite to the first end,
the capacitor body is disposed so that the sealing member is adjacent to the seat plate,
the seat plate includes:
a base part; and
a support wall extending from the base part along a circumferential surface of the tubular part,
the tubular part has an annular recess surrounding the tubular part, a first maximum diameter portion, and a second maximum diameter portion, the annular recess being located in a portion of the tubular part that contacts the sealing member and being recessed toward the sealing member, the first maximum diameter portion being disposed closer to the bottom wall than the annular recess is, the second maximum diameter portion being disposed closer to the second end than the annular recess is,
a diameter A of the first maximum diameter portion, a diameter B of the second maximum diameter portion, and an inner diameter C of the support wall satisfy a relation A>C>B in a state that the capacitor body is not installed in the seat plate,
a distance E from an outer surface of the base part of the seat plate to the first maximum diameter portion and a distance F from the first maximum diameter portion to a tip end of the support wall satisfy a relation 0.43≤F/E≤0.94, and
the diameter A and a total height H of the seat-plate-mounted capacitor satisfy a relation 0.5≤H/A≤1.5.

### Claim 2 (depends on 1)

The seat-plate-mounted capacitor according to claim 1, wherein in a state that the capacitor body is not installed in the seat plate, the inner diameter C in a position closer to a tip end of the support wall is smaller than the inner diameter C in a position closer to the base part.

### Claim 3 (depends on 1)

The seat-plate-mounted capacitor according to claim 1, wherein:
the support wall includes two or more support posts; and
in a cross section of the support wall that is perpendicular to an axis of the capacitor body, the two or more support posts are disposed point-symmetrically with respect to a center of the cross section.

### Claim 4 (depends on 1)

The seat-plate-mounted capacitor according to claim 1, wherein:
the support wall includes an even number of support posts; and
in a cross section of the support wall that is perpendicular to an axis of the capacitor body, two of the even number of support posts are disposed opposite to each other.

### Claim 5 (depends on 1)

The seat-plate-mounted capacitor according to claim 1, wherein the diameter A is 10 mm or less.

### Claim 6

A seat-plate-mounted capacitor comprising:
a capacitor body; and
a seat plate in which the capacitor body is installed, wherein:
the capacitor body includes:
a case including a tubular part having a cylindrical shape and a bottom wall closing a first end of the tubular part; and
a sealing member closing a second end of the tubular part, the second end being opposite to the first end,
the capacitor body is disposed so that the sealing member is adjacent to the seat plate,
the seat plate includes:
a base part; and
a support wall extending from the base part along a circumferential surface of the tubular part,
the tubular part has an annular recess surrounding the tubular part, a first maximum diameter portion, and a second maximum diameter portion, the annular recess being located in a portion of the tubular part that contacts the sealing member and being recessed toward the sealing member, the first maximum diameter portion being disposed closer to the bottom wall than the annular recess is, the second maximum diameter portion being disposed closer to the second end than the annular recess is,
a diameter A of the first maximum diameter portion, a diameter B of the second maximum diameter portion, and an inner diameter C of the support wall satisfy a relation A>C>B in a state that the capacitor body is not installed in the seat plate,
the support wall includes two or more support posts,
two or more support posts includes a first support post and a second support post, the second support post having a lower height than the first support post, and
a distance H1 from an outer surface of the base part of the seat plate to a tip end of the first support post and a distance H2 from the outer surface of the base part of the seat plate to a tip end of the second support post satisfy a relation 1.10≤H1/H2≤1.22.

### Claim 7 (depends on 6)

The seat-plate-mounted capacitor according to claim 6, wherein a distance E from the outer surface of the base part of the seat plate to the first maximum diameter portion and a distance F from the first maximum diameter portion to a tip end of the support wall satisfy a relation 0.1≤/E≤1.0.

### Claim 8 (depends on 6)

The seat-plate-mounted capacitor according to claim 6, wherein in a state that the capacitor body is not installed in the seat plate, the inner diameter C in a position closer to a tip end of the support wall is smaller than the inner diameter C in a position closer to the base part.

### Claim 9 (depends on 6)

The seat-plate-mounted capacitor according to claim 6, wherein in a cross section of the support wall that is perpendicular to an axis of the capacitor body, the two or more support posts are disposed point-symmetrically with respect to a center of the cross section.

### Claim 10 (depends on 6)

The seat-plate-mounted capacitor according to claim 6, wherein in a cross section of the support wall that is perpendicular to an axis of the capacitor body, two of the even number of support posts are disposed opposite to each other.

### Claim 11 (depends on 6)

The seat-plate-mounted capacitor according to claim 6, wherein the diameter A is 10 mm or less.