CN1088325C - Earthing terminal structure - Google Patents
Earthing terminal structure Download PDFInfo
- Publication number
- CN1088325C CN1088325C CN97116320A CN97116320A CN1088325C CN 1088325 C CN1088325 C CN 1088325C CN 97116320 A CN97116320 A CN 97116320A CN 97116320 A CN97116320 A CN 97116320A CN 1088325 C CN1088325 C CN 1088325C
- Authority
- CN
- China
- Prior art keywords
- circuit
- terminal
- side plate
- earth terminal
- printed circuit
- 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.)
- Expired - Lifetime
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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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
-
- 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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/111—Pads for surface mounting, e.g. lay-out
- H05K1/112—Pads for surface mounting, e.g. lay-out directly combined with via connections
-
- 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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Multi-Conductor Connections (AREA)
Abstract
The present invention relates to the earth terminal structure, an earth terminal 7 is formed by cutting/bending parallel to an end surface at a notch part of a side plate of a shield case, so, the flat surface of an earth terminal and the flat surfaces of circuit terminals of a printed substrate are positioned parallel, near each other, while facing, so that, through circuit patterns of a mother board on a set device side, it is connected to the circuit terminals of a capacitor at the nearest position, thereby, even when the circuit of high frequency device contains spurious signals, enough earthing is established through the capacitor.
Description
The present invention relates to have the terminal construction of the electronic equipment etc. of electronic circuit.
In the existing electronic equipment, the terminal construction that for example has a high-frequency circuit as shown in Figure 5, screening housing 11 is made of metallic plate, has open up and down peristome 12, four limits and forms box-shaped by 4 side plates 13,14,15,16.The end usefulness riveted joints of each side plate 13,14,15,16 etc. are fixing.Side plate 13 is the rectangles of being pressed from both sides by its upper and lower end face 13a, 13b, forms 2 notch part 13c, 13d on end face 13a, forms earth terminal 17 in breach 13c, forms the pawl 13e to screening housing 11 internal bend on the close tabular surface of side plate 15.
As shown in Figure 6, notch part 13c removes die-cut part with punch process and forms, and in notch part 13c, at one end portion forms the step-like 13f of platform portion, form tongue-shaped earth terminal 17 in the other end, this earth terminal 17 extends towards the direction that is parallel to side plate 13 end face 13a, 13b.Peripheral part of tongue-shaped earth terminal 17 is punched to be fallen, and this tongue-shaped earth terminal 17 is turned up along the broken line B perpendicular to end face 13a, makes its planar portions 17a along the foreign side that reaches screening housing 11 perpendicular to the direction of end face 13a.
In the both sides of breach 13d, form the step-like 13g of platform portion, the 13f of platform portion among 13g of this and the breach 13c is a sustained height.
On the opposite of side plate 13, hold peristome 12 ground under the arm and forming side plate 14, on the tabular surface of this side plate 14, form several pawls 14a, the pawl 13e of this pawl 14a and side plate 13 is a sustained height, towards the internal bend of screening housing 11.
One side of side plate 13,14 is side plates 15, and this side plate 15 is provided with the grounding parts 15a that stretches out in the peristome outside.The opposite side of side plate 13,14 is side plates 16, has the grounding parts 16a that stretches out in peristome 12 outsides on this side plate 16.Form the screening housing 11 of box-shaped by the side plate 13,14,15,16 of above-mentioned structure.
But, because terminal 17 is to turn up along the broken line B perpendicular to end face 13a in a breach 13c of side plate 13, its planar portions 17a is along the foreign side that reaches screening housing 11 perpendicular to the direction of end face 13a, so, even 2 earth terminals 17 are set in notch part 13c, as shown in Figure 7, the interval of these 2 earth terminal 17b, 17c can not be less than the length sum C of 2 earth terminal 17b, 17c.Therefore, can not make above-mentioned 2 earth terminal 17b, 17c more approaching than C.And, can not be located at earth terminal 17 near the central portion of notch part 13c.
Using the electronic equipment of this structure screening housing 11, is that example describes with as shown in Figure 8 the high-frequency device that printed circuit board (PCB) 18 is installed.
On printed circuit board (PCB) 18 shown in Figure 8, the circuit that is made of with part etc. high frequency is arranged, this circuit board 18 is installed on the peristome 12 of screening housing 11 in this wise: its part is placed on step-like the 13f of portion, the 13g of side plate 13, be formed with the through hole that figure does not show on another part, the figure that several pawls 14a of pawl 13e and side plate 14 inserts on the printed circuit board (PCB) 18 do not show in the through hole, being formed on this through hole conductive printed circuit and each pawl 13e, 14a soldering on every side.
On printed circuit board (PCB) 18, form the circuit that various figure do not show, be used for this circuit is fetched into several circuit terminals 19a, 19b, the 19c of screening housing 11 outsides ... stretch out in the outside of screening housing 11, constitute high-frequency device like this.
The high-frequency device of above-mentioned structure is contained on the motherboard 20 such shown in schematic diagrames complete machine, Fig. 9 such as VTR that figure do not show or TV, fixes by soldering.
This high-frequency device, in for example power circuit or the agc circuit etc., if contain unwanted signals such as noise or pulse, then machine performance such as VTR or TV worsens.In order to address this problem, shown in the schematic diagram of Fig. 9, on the motherboard 20 of above-mentioned complete machine, and the ground connection printed circuit 20a of earth terminal 17 conductings and and the power supply printed circuit 20b of the circuit terminal 19a conducting of the power circuit of high-frequency device between, welding electric capacity (bypass electric capacity) 21 etc. just can go into ground with above-mentioned unwanted signal.
In addition, in agc circuit similarly, for example, and the AGC printed circuit 20c and ground connection printed circuit 20a of circuit terminal 19b conducting between, connect above-mentioned electric capacity 21, just unwanted signal can be gone into ground, thereby prevent that machine performance from worsening.
The structure of above-mentioned existing earth terminal 17, be that tongue-shaped earth terminal 17 bendings of extending in the direction of the end face 13a that is parallel to side plate 13 are formed, the position relation of several circuit terminals 19 on this earth terminal 17 and the printed circuit board (PCB) 18 that is installed in high-frequency device as shown in Figure 9, earth terminal 17 and circuit terminal 19a are adjacently located on the position of beeline, so, by power supply printed circuit 20b, in the position of distance circuit terminal 19a beeline, can be connected to ground connection printed circuit 20a to above-mentioned electric capacity 21.Therefore, power supply printed circuit 20b is connected with ground connection printed circuit 20a with low-down impedance ground, even contain unwanted signal etc. in the power circuit, also can go into ground to this unwanted signal by ground connection printed circuit 20a.
But, because the circuit terminal 19b of above-mentioned agc circuit is across the circuit terminal 19a of power circuit and be positioned at position away from earth terminal 17, therefore, as shown in Figure 9, above-mentioned AGC printed circuit 20c forms the L font round in order not contact with power supply printed circuit 20b, circuit terminal 19b position away from agc circuit is connected to ground connection printed circuit 20a by AGC printed circuit 20c with electric capacity 21.Therefore, distance lengthening from the circuit terminal 19b of agc circuit to the AGC printed circuit 20c the position that connects electric capacity 21, in this long AGC printed circuit 20c, produce the inductance composition, if in the ACG circuit, contain unwanted signal, then can not make this undesired signal fully go into ground, can not give full play to the electric property of agc circuit by ground connection printed circuit 20a.
Existing earthing terminal structure, form towards foreign side's bending of opening 12 owing to being tongue-shaped earth terminal 17 that the direction that is parallel to the end face 13a of side plate 13 is extended, so, though earth terminal 17 is positioned at the beeline adjacent with the circuit terminal 19a of printed circuit board (PCB) 18.But adjacent circuit terminal 19b away from this circuit terminal 19a.Therefore, this existing earthing terminal structure is used for high-frequency device, when being installed on the complete machine, for example, with the AGC printed circuit 20c of the circuit terminal 19b conducting of agc circuit and with the ground connection printed circuit 20a of earth terminal 17 conductings, as illustrated in fig. 9, by making a circulation into the AGC printed circuit 20c of L font, connect electric capacity 21 in the circuit terminal 19b that leaves agc circuit position farthest, so, the AGC printed circuit 20c from the circuit terminal 19b of agc circuit to the position that connects electric capacity 21, produce the inductance composition,, then can not make this undesired signal fully go into ground by ground connection printed circuit 20a if contain unwanted signal etc. in the agc circuit, the electric property of agc circuit can not be given full play to, machine performance such as VTR or TV can not be improved.
In addition, in the earthing terminal structure of existing screening housing, because earth terminal 17 can not be arranged near the central portion of notch part 13c of side plate 13, and can only be provided with near the end of notch part 13c, so the configuration of power circuit or agc circuit must be configured near the end of notch part 13c, so, the range limited system of circuit design in high-frequency device and the complete machine, the degree of freedom of circuit design is little.
In order to address the above problem, earthing terminal structure provided by the invention has the screening housing that formed by side plate, be located at the notch part on the above-mentioned side plate and be located at earth terminal in this notch part, it is characterized in that above-mentioned earth terminal is that the part with screening housing is parallel to the bending of side plate end face ground and stretches out in screening housing outside and form.
Another feature of earth terminal of the present invention is, at the above-mentioned earth terminal of notch part formation more than 2 of side plate.
Another feature of earth terminal of the present invention is, have the printed circuit board (PCB) that is located at the screening housing open interior and stretch out in the screening housing outside, be located at several circuit terminals on the printed circuit board (PCB), the plane of these several circuit terminals and the plane of earth terminal are in opposite directions.
As mentioned above, because earthing terminal structure of the present invention, be that the part of screening housing is parallel to the bending of side plate end face ground, formation stretches out in the earth terminal of screening housing outside, so, each circuit terminal apart from power circuit and agc circuit is equidistant, and, form earth terminal in the position of beeline, so, can be apart from each circuit terminal beeline position, by each printed circuit above-mentioned electric capacity 21 is connected to the ground connection printed circuit, so, even contain unwanted signal in power circuit or the agc circuit, also can this undesired signal be gone into ground, so can improve VTR by electric capacity, machine performance such as TV.
Because the above-mentioned earth terminal of notch part formation more than 2 at side plate, because of the convenience in the design, even non-conterminous ground of the circuit terminal separate configuration of the circuit terminal of power circuit and agc circuit, also can be located at above-mentioned earth terminal more than 2 apart from the beeline position of above-mentioned each circuit terminal of separate configuration, so, can be located at position easily to power circuit or agc circuit, thereby improve the degree of freedom of circuit design, can improve machine performance such as VYR, TV.
In addition, because the plane of above-mentioned several circuit terminals is relative with the plane of earth terminal, so, earth terminal can be formed on apart from the equidistant and beeline position of circuit terminal of the circuit terminal and the agc circuit of power circuit, can be connected to the ground connection printed circuit to electric capacity apart from above-mentioned each circuit terminal beeline position, thereby, even contain unwanted signal in power circuit or the agc circuit, also can this undesired signal be gone into ground effectively, thereby improve machine performance such as VTR, TV by electric capacity.
Fig. 1 is to use the stereogram of the screening housing of earthing terminal structure of the present invention.
Fig. 2 is the skeleton diagram of the side plate of explanation earthing terminal structure of the present invention.
Fig. 3 is to use the summary lateral view of the high-frequency device of earthing terminal structure of the present invention.
Fig. 4 is that a high-frequency device that uses earthing terminal structure of the present invention is installed in the key diagram on the complete machine motherboard.
Fig. 5 is to use the stereogram of the screening housing of existing earthing terminal structure.
Fig. 6 is the skeleton diagram of the side plate of the existing earthing terminal structure of explanation.
Fig. 7 is the skeleton diagram of the side plate of the existing earthing terminal structure of explanation.
Fig. 8 is to use the summary lateral view of the high-frequency device of existing earthing terminal structure.
Fig. 9 is installed to key diagram on the complete machine motherboard to the high-frequency device that uses existing earthing terminal structure.
Below, the embodiment of earthing terminal structure of the present invention is described referring to figs. 1 through Fig. 4.Annotate with same numeral with parts identical in the DESCRIPTION OF THE PRIOR ART part.
Earthing terminal structure of the present invention as shown in Figure 1, the screening housing 1 that is made of metallic plate has open up and down peristome 2, and 4 side plates 3,4,5,6 are arranged all around, each bight of this side plate 3,4,5,6 is fixing by riveted joint etc., forms box-shaped.
In another notch part 3d of side plate 3, form the step-like 3g of platform portion in the end of both sides, the 3f of platform portion among 3g of this and the notch part 3c is a sustained height.At close side plate 5 places of side plate 3, form pawl 3e.
In the opposite side of side plate 3, holding peristome 2 ground under the arm and forming side plate 4, on the tabular surface of this side plate 4, form the pawl 4a of some peristome 2 internal bend towards screening housing 1, with the pawl 3e of side plate 3 be sustained height.
In a side of side plate 3,4 are side plates 5, and this side plate 5 has the grounding parts 5a that stretches out in peristome 2 outsides.In another side of side plate 3,4 is side plate 6, this side plate 6 have with the same direction of grounding parts 5a of side plate 5 stretch out in the grounding parts 6a of peristome 2 outsides.Constitute the screening housing 1 of box-shaped by side plate 3,4,5,6, earth terminal of the present invention is located on this screening housing 1.
With the high-frequency device that printed circuit board (PCB) 18 is installed shown in Figure 3 is example, and the example that uses the screening housing 1 that has earthing terminal structure of the present invention is described.
On the printed circuit board (PCB) 18 shown in Figure 3, the circuit that is made of with part etc. high frequency is arranged.This printed circuit board (PCB) 18 is installed on the peristome 2 of screening housing 1 like this.Promptly, its part is placed on step-like the 3f of portion, the 3g of notch part 3c, 3d of side plate 3, another part is provided with the through hole that figure does not show, the figure that several pawls 4a on pawl 3e and the side plate 4 inserts printed circuit board (PCB) 18 do not show in the through hole, is formed on conductive printed circuit around this through hole and above-mentioned each pawl 3e, 4a soldering.
On above-mentioned printed circuit board (PCB) 18, the various circuit that formation figure does not show, it is outside and be connected to several circuit terminals 19 on the motherboard printed circuit of complete machines such as VTR or TV and stretch out in the outside of screening housing 1, promptly stretch out with the grounding parts 6a of the grounding parts 5a of side plate 5 or side plate 6 equidirectionally and constitute high-frequency device to be used for that this circuit is fetched into screening housing.The high-frequency device of above-mentioned structure is installed on the motherboard 10 shown in schematic diagrames complete machine, Fig. 4 such as VTR that figure do not show or TV, and is fixing with soldering etc.
The motherboard 10 of the above-mentioned complete machine of high-frequency device (this high-frequency device has used earthing terminal structure of the present invention) is installed, shown in the schematic diagram of Fig. 4, the plane of earth terminal 7a is relative with the plane of the circuit terminal 19a of power circuit and be positioned at closely position, so, can be connected to ground connection printed circuit 10a to electric capacity 21 by power supply printed circuit 10b in the position of distance circuit terminal 19a beeline.Therefore, because can make power supply printed circuit 10b ground connection with low-down impedance ground, so, even contain unwanted signal in the power circuit, also can this unwanted signal be gone into ground, so can improve machine performance such as VTR, TV by ground connection printed circuit 10a.
In addition, since the plane of the circuit terminal 19b of agc circuit also with the plane parallel of earth terminal 7b and relative, be positioned at closely and locate, so, can be connected to ground connection printed circuit 10a to electric capacity 21 by printed circuit 10c in the position of the circuit terminal 19b of distance agc circuit minimum distance.Therefore, AGC printed circuit 10c even contain unwanted signal in the agc circuit, also can go into ground with this unwanted signal by ground connection printed circuit 10a, so can improve machine performance such as VTR, TV with low-down impedance ground ground connection.
In addition, earthing terminal structure of the present invention is not limited to 2 earth terminal 7a, 7b shown in Figure 4, for example, also can be at the circuit terminal 19a of power circuit the adjacent relative position of circuit terminal 19c, form earth terminal (figure does not show) with earth terminal 7a, 7b same configuration.In addition, in the circuit terminal 19b neighbour's of agc circuit circuit terminal 19d position in opposite directions, also can form the earth terminal of same configuration.Therefore, because of the convenience in the design,, also earth terminal 7a, 7b can be formed on the position of any beeline in circuit terminal 19a, 19b, 19c, the 19d even the circuit terminal 19b of the circuit terminal 19a of power circuit and agc circuit is non-conterminous.Therefore, can connect electric capacity 21 by each printed circuit,,, can improve machine performance such as VTR, TV with low impedance ground ground connection by the effect of electric capacity 21 in position apart from each circuit terminal beeline.
In addition, even the circuit terminal 19b of the circuit terminal 19a of above-mentioned power circuit and agc circuit is configured in position away from each other, according to earthing terminal structure of the present invention, owing near the circuit terminal 19a, the 19b that are configured in position away from each other, be provided with earth terminal 7, can improve the degree of freedom on designing.
Claims (3)
1. earthing terminal structure, have the screening housing that forms by side plate, be located at the notch part on the above-mentioned side plate and be located at earth terminal in this notch part, it is characterized in that above-mentioned earth terminal is that the part with screening housing is parallel to the bending of side plate end face ground and stretches out in screening housing outside and form.
2. earthing terminal structure as claimed in claim 1 is characterized in that, at the above-mentioned earth terminal of notch part formation more than 2 of side plate.
3. earthing terminal structure as claimed in claim 1 or 2, it is characterized in that, have the printed circuit board (PCB) that is located at the screening housing open interior and stretch out in the screening housing outside, be located at several circuit terminals on the printed circuit board (PCB), the plane of these several circuit terminals and the plane of earth terminal are in opposite directions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22786396A JP3453029B2 (en) | 1996-08-09 | 1996-08-09 | Ground terminal structure |
| JP227863/96 | 1996-08-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1173804A CN1173804A (en) | 1998-02-18 |
| CN1088325C true CN1088325C (en) | 2002-07-24 |
Family
ID=16867545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97116320A Expired - Lifetime CN1088325C (en) | 1996-08-09 | 1997-08-08 | Earthing terminal structure |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3453029B2 (en) |
| KR (1) | KR100286472B1 (en) |
| CN (1) | CN1088325C (en) |
| MY (1) | MY125566A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5804869B2 (en) * | 2011-09-20 | 2015-11-04 | ダイヤモンド電機株式会社 | Control unit for electric power steering system |
| JP5846824B2 (en) * | 2011-09-26 | 2016-01-20 | ダイヤモンド電機株式会社 | Electric power steering control unit |
| CN110113923B (en) * | 2016-06-20 | 2020-10-30 | 海信集团有限公司 | Laser cinema equipment |
| CN107567274B (en) * | 2017-11-03 | 2020-03-31 | 成都芯通科技股份有限公司 | PCB signal unit shielding grounding device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05327237A (en) * | 1992-05-14 | 1993-12-10 | Fujitsu Ten Ltd | Earth structure |
-
1996
- 1996-08-09 JP JP22786396A patent/JP3453029B2/en not_active Expired - Lifetime
-
1997
- 1997-08-08 CN CN97116320A patent/CN1088325C/en not_active Expired - Lifetime
- 1997-08-08 MY MYPI97003622A patent/MY125566A/en unknown
- 1997-08-08 KR KR1019970037849A patent/KR100286472B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| MY125566A (en) | 2006-08-30 |
| JP3453029B2 (en) | 2003-10-06 |
| KR19980018500A (en) | 1998-06-05 |
| CN1173804A (en) | 1998-02-18 |
| JPH1056284A (en) | 1998-02-24 |
| KR100286472B1 (en) | 2001-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20020724 |