WO2007052392A1 - 回路基板の締結部構造 - Google Patents
回路基板の締結部構造 Download PDFInfo
- Publication number
- WO2007052392A1 WO2007052392A1 PCT/JP2006/314279 JP2006314279W WO2007052392A1 WO 2007052392 A1 WO2007052392 A1 WO 2007052392A1 JP 2006314279 W JP2006314279 W JP 2006314279W WO 2007052392 A1 WO2007052392 A1 WO 2007052392A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit board
- chassis
- fastening
- concave portion
- concave
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1417—Mounting supporting structure in casing or on frame or rack having securing means for mounting boards, plates or wiring boards
- H05K7/142—Spacers not being card guides
Definitions
- the present invention relates to a circuit board fastening portion structure fastened to a chassis of an electronic device.
- a part of a circuit board of an electronic device is fastened to a chassis with a screw.
- the component mounting surface or circuit pattern forming surface of the circuit board and the chassis are spaced at a predetermined interval.
- the circuit board and the chassis are fastened with screws so as to be held apart.
- a concave portion is drawn at the board fastening portion of the chassis, and the tip surface (bottom portion) of the concave portion is brought into contact with the circuit board.
- a configuration in which the bottom of the concave portion of the chassis and the circuit board are fastened with screws is already known.
- the concave portion of the chassis is formed to have a bottom area larger than the diameter of the head portion of the screw housed in the concave portion, and the concave portion is in a fastening state between the chassis and the circuit board. The entire bottom surface of the is bonded to the circuit board.
- a board seating surface having a convex cross section is drawn at a board fastening part of a chassis (housing), and a burring process is performed on the board seating surface.
- a screw hole is formed, and a spring washer and a flat washer are interposed between the circuit board abutted and supported on the board seating surface and the screw head, and the chassis and
- a configuration in which a circuit board is fastened and fixed with a screw screwed into the screw hole is already known (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Laid-Open No. 2001-332878 (paragraph [0057], FIG. 2)
- the circuit board and the bottom surface of the concave portion formed in the board fastening portion of the chassis and sized to house the screw head There is a problem that the contact area increases, and the effective area of the circuit board decreases accordingly. That is, since the bottom surface of the concave portion formed in a bottom area larger than the diameter of the screw head and the circuit board is in contact with the chassis without any gap, a circuit is formed in a contact area between the bottom surface of the concave portion on the circuit board. There was a problem that the effective area of the circuit board was reduced because it was not possible to form a pattern or to place mounting parts, and this would hinder downsizing of electronic devices.
- the circuit board is in contact with the board seat surface drawn on the chassis without gaps, and the flat washer is also in contact with the circuit board without gaps.
- the circuit board can be effectively used without forming a circuit pattern or placing components in the contact area of the circuit board with the board seating surface of the chassis and the flat washer. The area is reduced, and the flat washer and the spring washer must be interposed between the screw head and the circuit board. Therefore, the problem is that the number of parts increases and the cost increases. there were.
- the present invention has been made to solve the above-described problems.
- the chassis is formed with a concave portion for fastening the circuit board, the bottom of the concave portion and the circuit board are formed. It is an object to obtain a fastening part structure of a circuit board that can increase the effective area of the circuit board.
- the circuit board fastening portion structure is a circuit board fastening structure in which the chassis and the circuit board are fastened by a fastening member through the bottom of a concave portion for fastening the circuit board formed in the chassis.
- a cylindrical part that protrudes toward the circuit board side and that is inserted into the fastening member is integrally formed at the bottom of the concave part, and the tip of the cylindrical part is brought into contact with the circuit board to form the concave part.
- a gap is formed between the bottom and the circuit board.
- a circuit board fastening portion structure is a circuit board fastening structure in which the chassis and the circuit board are fastened by a fastening member via a bottom of a concave portion for fastening the circuit board formed in the chassis.
- a cylindrical portion that protrudes toward the chassis and is inserted into the ground member is integrally formed on the ground member mounted on the circuit board, and the tip of the cylindrical portion is formed.
- the circuit board and the chassis are electrically connected by bringing the end into contact with the bottom of the concave portion.
- the tip of the cylindrical portion that is integrally formed at the bottom of the concave portion formed in the chassis and protrudes toward the circuit board is brought into contact with the circuit board, whereby the concave portion Since the air gap is formed between the bottom and the circuit board, a circuit pattern to be arranged in the air gap is formed at a position corresponding to the bottom of the concave portion on the circuit board, an electronic component, etc.
- This has the effect of increasing the effective area of the circuit board.
- the circuit board and the chassis can be electrically connected by bringing the tip of the cylindrical part formed integrally with the bottom of the concave part of the chassis into contact with the circuit board as described above.
- the grounding structure of the circuit board can be realized by the cylindrical part integral with the concave part without requiring a grounding member separate from the chassis and the circuit board. Furthermore, since a member separate from the chassis and the circuit board is not required to form the gap, it is possible to reduce the number of parts and reduce the cost.
- a cylindrical portion that protrudes toward the chassis and is inserted into the ground member is integrally formed on the ground member mounted on the circuit board, and the tip of the cylindrical portion is formed in the chassis.
- the ground member is arranged in a gap formed between the bottom of the concave portion and the circuit board by the cylindrical portion integral with the ground member. Therefore, the effective area of the circuit board is increased. Further, as described above, the gap portion can be formed by the cylindrical portion integral with the ground member, and a member separate from the ground member is not required to form the gap portion. There is an effect that the number of parts can be reduced and the cost can be reduced.
- FIG. 1 is a cross-sectional view showing a fastening part structure of a circuit board according to Embodiment 1 of the present invention.
- FIG. 2 is a sectional view taken along line AA in FIG.
- FIG. 3 is a cross-sectional view showing a fastening part structure of a circuit board according to Embodiment 2 of the present invention.
- FIG. 4 is a sectional view taken along the line BB in FIG.
- FIG. 5 is a sectional view showing a fastening part structure of a circuit board according to Embodiment 3 of the present invention.
- FIG. 6 is a sectional view taken along the line CC in FIG.
- FIG. 1 is a cross-sectional view showing a fastening structure of a circuit board according to Embodiment 1 of the present invention
- FIG. 2 is a cross-sectional view taken along line AA in FIG.
- the fastening structure of the circuit board shown in FIG. 1 is, for example, a fastening screw (tightening) for the chassis 2 that is a lid member force of the housing 1 and the circuit board 3 housed in the housing 1 in an in-vehicle electronic device. It is the general composition concluded in 4). More specifically, a post 5 for supporting a substrate having a screw hole 5a is erected on the bottom of the housing 1. On the other hand, the circuit board 3 is provided with a screw insertion hole 3a for communicating with the screw hole portion 5a of the post 5.
- the circuit board 3 is placed on the post 5 by positioning the screw insertion hole 3 a at a position where it communicates with the screw hole 5 a of the post 5.
- the circuit board 3 placed on the post 5 and the chassis 2 disposed on the circuit board 3 are screwed into the screw holes 5a of the post 5 with fastening screws 4 Fastened and fixed.
- a tapered concave portion 2a and a bottom center force of the concave portion 2a are directed toward the circuit board 3 side.
- a cylindrical part 2b for inserting a tightening screw that protrudes by force is integrally formed by a burring carriage.
- the concave portion 2a is formed in such a size that a bottom portion thereof forms a seating surface of the head portion 4a of the fastening screw 4, and the cylindrical portion 2b can insert a screw shaft portion of the fastening screw 4.
- the inner diameter of the circuit board 3 is larger than that of the screw insertion hole 3a.
- circuit board 3 and chassis 2 I will explain.
- the chassis 2 After positioning and mounting the circuit board 3 on the post 5 in the housing 1, the chassis 2 is positioned and arranged on the circuit board 3, so that the screw hole 5a of the post 5 and the screw hole of the circuit board 3 are positioned.
- the through hole 3a and the cylindrical part 2b of the chassis 2 are communicated with each other.
- the internal force of the concave portion 2a of the chassis 2 is also screwed and tightened into the screw hole portion 5a of the post 5 via the cylindrical portion 2b and the screw insertion hole 3a of the circuit board 3.
- the circuit board 3 and the chassis 2 are fastened and fixed on the post 5.
- the concave portion 2a capable of accommodating the head 4a of the fastening screw 4 at the circuit board fastening portion of the chassis 2, and the bottom force of the concave portion 2a is also the circuit on the post 5.
- a cylindrical portion 2b that protrudes toward the substrate 3 and into which the tightening screw 4 is inserted is integrally formed, and the tip of the cylindrical portion 2b is brought into contact with the circuit board 3 to form a bottom portion of the concave portion 2a. Since the gap S is formed between the circuit board 3 and the circuit board 3, the gap S is formed by the gap S compared to the conventional example in which the entire bottom surface of the concave part 2a is in contact with the circuit board 3. The effective area of the circuit board 3 is increased.
- a circuit pattern arranged in the region of the gap S formed by the cylindrical part 2b between the bottom of the concave part 2a of the chassis 2 and the circuit board 3 is formed on the circuit board 3,
- Mounted components such as electronic components with a height mounted on the circuit board 3 can be arranged in the gap S, which increases the degree of freedom in circuit pattern design and contributes to downsizing of electronic devices. There is an effect. Further, it is possible to dispose a ground member in the gap S, and in this case, there is an effect that the ground member and the chassis 2 can be electrically connected by the cylindrical portion 2b.
- FIG. 3 is a cross-sectional view showing the structure of the fastening portion of the circuit board according to Embodiment 2 of the present invention
- FIG. 4 is a cross-sectional view taken along the line B-B in FIG.
- the tip of the cylindrical portion 2b of the chassis 2 is The chassis 2 and the circuit board 3 are fastened with a fastening screw 4 in contact with the root portion of the ground member (ground plate) 6 mounted on the circuit board 3, thereby allowing the chassis 2 and the circuit board 3 to pass through the cylindrical part 2 b.
- the chassis 2 and the ground member 6 are electrically connected.
- the ground member 6 has a plurality of ground terminal portions 6a each having a height.
- the cylinder of the chassis 2 is provided between the bottom of the concave portion 2a of the chassis 2 and the circuit board 3. Since the grounding member 6 having a plurality of heights of the ground terminal portions 6a can be disposed in the space S formed by the shape portion 2b, the grounding member 6 having such a height can be disposed. Can be mounted on the circuit board 3 in the region of the gap S.
- FIG. 5 is a cross-sectional view showing the structure of the fastening portion of the circuit board according to Embodiment 3 of the present invention
- FIG. 6 is a cross-sectional view taken along the CC line of FIG.
- the same reference numerals are assigned and duplicate explanations are omitted.
- the cylindrical portion 2b is integrally formed at the center of the bottom of the concave portion 2a of the chassis 2.
- the first member mounted on the circuit board 3 is used.
- a cylindrical portion 6b is integrally formed at the root portion of 6, and the chassis 2 and the circuit board 3 are fastened with the fastening screw 4 by bringing the tip of the cylindrical portion 6b into contact with the bottom of the concave portion 2a. It is composed.
- the ground member 6 is formed by a plurality of ground terminal portions 6a having a height.
- the air gap S is formed between the bottom of the concave portion 2a of the chassis 2 and the circuit board 3 by the cylindrical portion 6b integrated with the ground member 6.
- a grounding member 6 on which a plurality of heighted grounding terminal portions 6a can be formed is mounted on the circuit board 3 so as to be disposed between the bottom of the concave portion 2a and the circuit board 3. It has the effect of being able to Further, since no separate member such as a washer is required to form the gap S, there is an effect that the number of parts can be reduced and the cost can be reduced.
- the circuit board fastening portion structure according to the present invention reduces the effective area of the circuit board. It is excellent for increasing and suitable for obtaining a miniaturized electronic device.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007542248A JP4593629B2 (ja) | 2005-11-04 | 2006-07-19 | 回路基板の締結部構造 |
DE112006003041T DE112006003041T5 (de) | 2005-11-04 | 2006-07-19 | Struktur eines Befestigungsabschnitts in einer Platine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005321259 | 2005-11-04 | ||
JP2005-321259 | 2005-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007052392A1 true WO2007052392A1 (ja) | 2007-05-10 |
Family
ID=38005553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/314279 WO2007052392A1 (ja) | 2005-11-04 | 2006-07-19 | 回路基板の締結部構造 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP4593629B2 (ja) |
CN (1) | CN101300914A (ja) |
DE (1) | DE112006003041T5 (ja) |
WO (1) | WO2007052392A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102285351B1 (ko) | 2019-10-02 | 2021-08-02 | 주식회사 현대케피코 | Pcb 고정장치 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0217869U (ja) * | 1988-07-21 | 1990-02-06 | ||
JPH06350271A (ja) * | 1993-06-14 | 1994-12-22 | Fujitsu Ltd | プリント板ユニットの取り付け構造 |
JP2005302789A (ja) * | 2004-04-06 | 2005-10-27 | Funai Electric Co Ltd | プリント基板の取付構造 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001332878A (ja) | 2000-05-23 | 2001-11-30 | Denso Corp | 電子機器のネジ締め構造 |
-
2006
- 2006-07-19 WO PCT/JP2006/314279 patent/WO2007052392A1/ja active Application Filing
- 2006-07-19 CN CNA2006800411905A patent/CN101300914A/zh active Pending
- 2006-07-19 JP JP2007542248A patent/JP4593629B2/ja not_active Expired - Fee Related
- 2006-07-19 DE DE112006003041T patent/DE112006003041T5/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0217869U (ja) * | 1988-07-21 | 1990-02-06 | ||
JPH06350271A (ja) * | 1993-06-14 | 1994-12-22 | Fujitsu Ltd | プリント板ユニットの取り付け構造 |
JP2005302789A (ja) * | 2004-04-06 | 2005-10-27 | Funai Electric Co Ltd | プリント基板の取付構造 |
Also Published As
Publication number | Publication date |
---|---|
DE112006003041T5 (de) | 2008-10-09 |
JPWO2007052392A1 (ja) | 2009-04-30 |
CN101300914A (zh) | 2008-11-05 |
JP4593629B2 (ja) | 2010-12-08 |
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