Source: https://patents.google.com/patent/JP4684789B2/en
Timestamp: 2020-07-05 15:10:10
Document Index: 382587707

Matched Legal Cases: ['art 25', 'art 25', 'art, 21', 'art, 24', 'art, 25', 'art, 25', 'art, 25', 'art, 27']

JP4684789B2 - Connector for coaxial cable - Google Patents
JP4684789B2
JP4684789B2 JP2005221252A JP2005221252A JP4684789B2 JP 4684789 B2 JP4684789 B2 JP 4684789B2 JP 2005221252 A JP2005221252 A JP 2005221252A JP 2005221252 A JP2005221252 A JP 2005221252A JP 4684789 B2 JP4684789 B2 JP 4684789B2
JP2005221252A
JP2007035587A (en
大智 宮本
隆史 筒井
桂治 黒田
2005-07-29 Application filed by 日本圧着端子製造株式会社 filed Critical 日本圧着端子製造株式会社
2005-07-29 Priority to JP2005221252A priority Critical patent/JP4684789B2/en
2007-02-08 Publication of JP2007035587A publication Critical patent/JP2007035587A/en
2011-05-18 Publication of JP4684789B2 publication Critical patent/JP4684789B2/en
The present invention relates to a connector for a coaxial cable mounted on a printed board.
In general, this type of connector has an offset type connector that is fixed in a state where a part is inserted into a notch formed on the printed circuit board, and is fixed in a state where it is placed at a predetermined position on the printed circuit board. There are on-board type connectors. When an offset type connector is used, for example, as described in Patent Document 1, since a notch is formed in a printed board, there is a situation that the strength of the printed board is reduced. On the other hand, when using an on-board type connector, it is not necessary to form a notch in the printed circuit board, so that the strength of the printed circuit board does not decrease. Therefore, recently, an on-board type connector that does not require the formation of a notch in a printed circuit board has been attracting attention.
JP 2001-319741 A (FIG. 2)
By the way, each of the offset type and onboard type connectors includes a housing made of an insulating material and a contact made of a conductive material. One end side of the contact is a terminal portion that is a contact point with the plug side in the housing, and the other end side is a lead portion that extends toward the printed circuit board outside the housing. Usually, the terminal portion is arranged so as to extend along the insertion direction of the plug in the housing, and the lead portion is printed as necessary to eliminate the distance between the terminal portion and the printed board outside the housing. It is bent and deformed to the substrate side.
Therefore, in the case of an on-board type connector, the distance between the terminal portion and the printed circuit board is wider than in the case of an offset type connector that is partially inserted into the notch of the printed circuit board. The portion of the lead portion that is bent and deformed toward the substrate side becomes longer. Further, since the lead portion needs to be bent and deformed toward the printed circuit board, it is usually formed to be narrower than the terminal portion. Therefore, in the on-board type connector, the impedance of the lead portion of the contact becomes smaller than the impedance of the terminal portion, and mismatching of impedance characteristics may occur. That is, when a high-frequency current (alternating current) is supplied to the on-board type connector from the printed circuit board side, the alternating current (signal) is reflected to the printed circuit board side at the lead portion, and as a result, supplied There has been a problem that the waveform of the alternating current is greatly disturbed.
The present invention has been made in view of such circumstances. Its purpose is to reduce the strength of the printed circuit board and to suppress the occurrence of dielectric breakdown between the lead part and the surrounding part surrounding it, while the waveform of the alternating current supplied to the contact has impedance characteristics. It is an object of the present invention to provide a connector for a coaxial cable that can be prevented from being disturbed due to the mismatch.
In order to achieve the above object, the invention according to claim 1 is a connector for a coaxial cable fixed in a state of being placed at a predetermined position on a printed circuit board, comprising an insulating housing, a conductive And a conductive contact. The housing has a front wall provided with an opening that communicates the inside and outside of the housing, and a rear wall that supports the shield, and the shield includes the housing. A substantially cylindrical tubular portion extending from the rear wall toward the opening, and an enclosing portion surrounding the contact outside the housing, wherein the contact is an opening of the housing within the tubular portion. A substantially cylindrical terminal portion extending toward the portion, and a substantially plate-shaped lead portion extending from the rear wall of the housing toward the printed circuit board while being surrounded by the surrounding portion. The lead portion is provided with an impedance adjusting portion that adjusts the impedance of the lead portion to be close to the impedance of the terminal portion by changing the capacitance between the surrounding portion and the lead portion. The impedance adjustment portion is formed in a flat plate shape and is wider than a portion other than the impedance adjustment portion in the lead portion.
According to the first aspect of the present invention, when the connector is fixed to the printed circuit board, it is not necessary to provide a notch in the printed circuit board, so that a decrease in strength of the printed circuit board is suppressed. Further, when a high-frequency alternating current is supplied to the contact, impedance mismatching at the contact is suppressed by the impedance adjustment unit provided in the lead portion of the contact. Therefore, it is possible to suppress a decrease in the strength of the printed circuit board and to suppress the disturbance of the waveform of the alternating current supplied to the contact due to the mismatch of impedance characteristics.
In general, an impedance calculated from the following conditional expression is generated in an AC current transmission line.
Z = (L / C) 0.5
However, Z: impedance, L: inductance, C: capacitance (capacitance)
In this regard, in the first aspect of the invention, instead of adjusting the inductance of the lead portion of the contact, the capacitance between the lead portion and the surrounding portion of the shield is adjusted relatively easily. The impedance of the lead part can be adjusted.
When the capacitance is to be adjusted by shortening the distance between the contact lead portion and the shield surrounding portion, there is a possibility that dielectric breakdown may occur between the lead portion and the surrounding portion. In this respect, in the first aspect of the present invention, since the impedance adjustment portion is formed by widening a part of the lead portion, it is possible to suppress the occurrence of dielectric breakdown between the lead portion and the surrounding portion. .
According to a second aspect of the present invention, in the connector for a coaxial cable according to the first aspect, the lead portion is bent and deformed toward the printed circuit board side so as to be substantially orthogonal to a direction in which the terminal portion extends. It has an orthogonal part, The impedance adjustment part is formed in the orthogonal part of the lead part.
If the impedance adjustment part is formed in the lead part along the direction in which the terminal part extends, the overall length of the connector is increased by the length of the part where the impedance adjustment part is formed, and the connector is enlarged. End up. In this respect, in the invention described in claim 4, since the impedance adjusting portion is formed in the orthogonal portion bent and deformed on the printed circuit board side so as to be substantially orthogonal to the extending direction of the terminal portion in the lead portion, the connector is large-sized. Without making it possible, the adjustable range of impedance in the lead portion can be widened.
According to a third aspect of the present invention, in the connector for a coaxial cable according to the second aspect, the orthogonal portion is bent and deformed at a position closest to a connection portion of the lead portion with the terminal portion. And
The invention according to claim 3 can further contribute to miniaturization of the connector.
While reducing the strength of the printed circuit board and suppressing the occurrence of dielectric breakdown between the lead part and the surrounding part surrounding it, the waveform of the alternating current supplied to the contact causes impedance mismatching. It is possible to suppress disturbance based on this.
Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. In the following description of the present specification, “up and down direction”, “left and right direction”, and “front and back direction” are the up and down direction, left and right direction, and front and rear direction in FIGS. Respectively).
As shown in FIGS. 1A and 1B, the coaxial cable connector 10 according to this embodiment is placed on a predetermined position on the printed circuit board 11 (for example, an edge of the printed circuit board 11). And includes a housing 12 made of an insulating material (for example, synthetic resin), a shield 13 made of a conductive material, and a contact 14 made of a conductive material. As shown in FIG. 2, the housing 12 has a substantially rectangular parallelepiped shape and is fixed on the printed circuit board 11 (see FIG. 1B).
Further, an opening 17 is formed in the front wall 12d of the housing 12 so that the insertion portion 16 formed in the housing 12 communicates with the outside of the housing 12, and for the coaxial cable (not shown) through the opening 17. The plug is inserted into the insertion portion 16. Further, the rear wall 12e of the housing 12 is formed with a through hole 18 that communicates the inside of the insertion portion 16 and the outside of the housing 12, and the shield 13 is supported in the through hole 18 in a fitted state. .
As shown in FIG. 2, the shield 13 has a shell 19 and a cover shell 20. The shell 19 includes a cylindrical portion 21 having a substantially cylindrical shape, a lid portion 22 that closes the rear end portion of the cylindrical portion 21, and a lower portion that is on the printed circuit board 11 side from the rear end portion of the cylindrical portion 21. And a pair of leg portions 23 extending toward. The shell 19 is fitted into the through hole 18 of the housing 12 with the cylindrical portion 21 aligned with the insertion direction of the plug (not shown) in the axial direction.
That is, the shell 19 has the lid portion 22 located on the rear side (outside) of the rear wall 12e of the housing 12 in a state where the cylindrical portion 21 is fitted and supported in the through hole 18 of the housing 12. The front end side of the cylindrical portion 21 is disposed in the insertion portion 16 so as to extend from the rear wall 12e toward the opening portion 17. In this state, the lower ends of the pair of leg portions 23 are soldered on the printed circuit board 11 (see FIG. 1B). On the other hand, the cover shell 20 is fixed to the outer surface (rear surface) of the rear wall 12e in the housing 12, and in the fixed state, the cover shell 20 is disposed so as to face the lid portion 22 of the shell 19 from the front side. become.
The contact 14 extends in the cylindrical portion 21 from the rear wall 12e of the housing 12 in the horizontal direction toward the opening 17, and extends from the rear wall 12e of the housing 12 toward the printed circuit board 11. A lead portion 25 is provided, and an insulating material 26 is packed between the tubular portion 21 and the terminal portion 24. Further, the cover shell 20 and the lid portion 22 and both leg portions 23 of the shell 19 are positioned around the front and rear, left and right of the lead portion 25. In this embodiment, the cover shell 20 and the lid portion 22 of the shell 19 and The leg portions 23 form an encircling portion H that encloses the lead portion 25 of the contact 14 outside the housing 12.
The contact 14 is obtained by processing a single long metal plate, and the terminal portion 24 is formed by bending a part of the metal plate in the longitudinal direction into a substantially cylindrical shape. Further, the lead portion 25 formed by a part of the metal plate has a substantially plate shape, and the lead portion 25 has a position of the terminal portion 24 at a position closest to the connection portion 25a with the terminal portion 24. An orthogonal portion 25b is formed that is bent and deformed downward toward the printed circuit board 11 so as to be substantially orthogonal to the extending direction.
That is, since the lead portion 25 is bent and deformed downward at a position closest to the connection portion 25a with the terminal portion 24, the connector 10 formed by assembling the contact 14 composed of the lead portion 25 and the terminal portion 24 is The length in the front-rear direction can be made substantially the same as the length in the front-rear direction in the offset type connector. Further, as shown in FIG. 3, the orthogonal portion 25b is formed with a wide portion 27 which is formed in a flat plate shape and is wider (D> D1) than other portions of the lead portion 25. The wide portion 27 is formed to have a substantially rectangular shape, and its four corners are chamfered. Therefore, the wide portion 27 is not provided with an acute angle portion.
Further, a soldering portion 25 c to be soldered to the printed circuit board 11 is formed on the rear end side of the lead portion 25 (that is, on the printed circuit board 11 side with respect to the wide portion 27). A high-frequency current (alternating current) is supplied to the contact 14 from the printed board 11 side through the soldering portion 25c of the lead portion 25 to the terminal portion 24 side. In the present embodiment, both the leg portions 23 of the shell 19 are fixed to the ground portion in the printed circuit board 11.
In the present embodiment, the width D of the wide portion 27 formed in the orthogonal portion 25b of the lead portion 25 is set based on the following conditions. That is, the impedance of the lead portion 25 is brought close to the impedance of the terminal portion 24 in order to suppress the impedance mismatch in the contact 14 and suppress the disturbance of the waveform of the alternating current supplied to the contact 14 from the printed board 11 side. There is a need. Incidentally, the impedance is calculated by the following relational expression.
Z = (L / C) 0.5 (1)
That is, the impedance (Z) of the lead portion 25 is adjusted by adjusting at least one of the inductance (L) of the lead portion 25 and the capacitance (C) between the lead portion 25 and the surrounding portion H. Can be adjusted. However, it is very difficult to change the inductance (L) by changing the shape of the lead portion 25 (wide portion 27). Therefore, in the present embodiment, the impedance (Z) of the lead portion 25 is adjusted by changing the capacitance (C) between the lead portion 25 and the surrounding portion H. In this case, in this embodiment, the wide portion 27 functions as an impedance adjustment unit that adjusts the impedance of the lead portion 25 to approach the impedance of the terminal portion 24.
The graph shown in FIG. 4 shows the relationship between the width dimension D of the wide portion 27 in the lead portion 25 and the impedance (Z) of the lead portion 25. Here, if the width dimension D of the wide portion 27 is the same as the width dimension D1 of the portion other than the wide portion 27 (for example, the soldering portion 25c) in the lead portion 25, the lead portion 25 and the surrounding portion H The capacitance (C) between the terminal portion 24 and the cylindrical portion 21 is smaller than the capacitance (C) between the terminal portion 24 and the cylindrical portion 21. In this case, the impedance (Z) calculated based on the relational expression (1) is larger than the impedance (Z) of the terminal portion 24.
Therefore, based on the graph shown in FIG. 4, when the width dimension D of the wide portion 27 is set to the width dimension D2 (> D1), the capacitance (C) between the lead portion 25 and the surrounding portion H and the terminal The capacitance (C) between the portion 24 and the cylindrical portion 21 is substantially the same. As a result, the impedance (Z) of the lead portion 25 becomes substantially the same value as the impedance (Z) of the terminal portion 24, and impedance mismatching in the contact 14 is suppressed.
When the wide portion 27 is not formed in the lead portion 25 of the contact 14, an impedance mismatch occurs. Therefore, when a high-frequency alternating current (for example, 5 GHz band) is supplied to the contact 14, the current is reflected between the lead portion 25 and the terminal portion 24, and as a result, the current passing through the contact 14 is reduced. Waveform is greatly disturbed. However, since the wide portion 27 provided under the above conditions is formed in the lead portion 25 of the contact 14 of this embodiment, when a high-frequency alternating current is supplied to the contact 14, the current waveform is disturbed. It is suppressed.
(1) The lead portion 25 of the contact 14 is provided with a wide portion (impedance adjusting portion) 27 for making the impedance of the lead portion 25 approach the impedance of the terminal portion 24 of the contact 14. Therefore, even when a high-frequency alternating current is supplied to the contact 14, impedance mismatch at the contact 14 is suppressed. Moreover, when fixing the connector 10 of this embodiment to the printed circuit board 11, since it is not necessary to provide a notch in the printed circuit board 11, the strength reduction of the printed circuit board 11 is suppressed. Therefore, it is possible to suppress a decrease in strength of the printed circuit board 11 and to prevent the waveform of the alternating current supplied to the contact 14 from being disturbed due to impedance characteristic mismatch.
(2) Rather than adjusting the inductance of the lead portion 25 of the contact 14 but adjusting the capacitance between the lead portion 25 and the surrounding portion H of the shield 13, the impedance of the lead portion 25 can be easily adjusted. Can be adjusted.
(3) When the capacitance is to be adjusted by shortening the distance between the lead portion 25 of the contact 14 and the surrounding portion H of the shield 13, insulation is performed between the lead portion 25 and the surrounding portion H. There is a risk of destruction. In this regard, in this embodiment, since the wide portion (impedance adjusting portion) 27 is formed by widening a part of the lead portion 25, dielectric breakdown occurs between the lead portion 25 and the surrounding portion H. This can be suppressed.
(4) When the capacitance is adjusted by changing the distance between the lead portion 25 of the contact 14 and the surrounding portion H of the shield 13, a separate part is attached to the contact 14, It is necessary to bend the lead portion 25 and the surrounding portion H. However, in the present embodiment, a wide portion (impedance adjustment portion) 27 is formed by widening a part of the lead portion 25, and the wide portion 27 functions as an impedance adjustment portion. The increase in the number of parts and the increase in the number of manufacturing steps can be suppressed.
(5) If the wide portion (impedance adjusting portion) 27 is formed in a portion of the lead portion 25 along the direction in which the terminal portion 24 extends, the length of the portion where the wide portion 27 is formed is the length of the connector 10. The overall length becomes long, and the connector 10 is enlarged. In this respect, in the present embodiment, the wide portion 27 is formed in the orthogonal portion 25b that is bent and deformed to the printed circuit board 11 side so as to be substantially orthogonal to the extending direction of the terminal portion 24 in the lead portion 25. The range in which the impedance of the lead portion 25 can be adjusted can be widened without increasing the size.
(6) Since the orthogonal portion 25b is bent and deformed at a position near the connection portion 25a with the terminal portion 24 in the lead portion 25, it can further contribute to miniaturization of the connector 10.
(7) Since the wide portion 27 of the lead portion 25 is not formed with an acute angle portion, when a high-frequency alternating current is supplied to the contact 14, radio waves based on the current are radiated from the wide portion 27. This can be suppressed.
The following connector is not an embodiment of the present invention but a reference example.
In the first embodiment, when the impedance of the terminal portion 24 is large, the impedance adjustment portion is narrower than the portion other than the impedance adjustment portion in the lead portion 25 (D <D1). The connector is formed as described above.
The second reference example is that, in the above-described embodiment, the impedance adjustment unit reduces the distance between the lead part 25 of the contact 14 and the surrounding part H of the shield 13, so that the lead part 25 and the surrounding part H It is a connector which adjusts the electrostatic capacity between. In other words, the connector is a connector in which the impedance adjustment portion is thicker than the portion other than the impedance adjustment portion in the lead portion 25. In addition, the connector is provided with an impedance adjustment portion in the surrounding portion H.
In the third embodiment, the third reference example is a connector that adjusts the inductance of the lead portion 25.
Next, the technical idea that can be grasped from the embodiment and the reference example will be described below.
(A) The connector according to claim 1, wherein the impedance adjustment portion is provided in the lead portion, and is formed to be narrower than a portion other than the impedance adjustment portion in the lead portion.
(A) is a front sectional view of the connector in the present embodiment, (b) is a sectional view taken along line AA in FIG. 1 (a). It is a disassembled perspective view of the connector in this embodiment. It is a side view of a contact. It is a graph which shows the relationship between the width dimension of a wide part, and the impedance of a lead part.
DESCRIPTION OF SYMBOLS 10 ... Connector, 11 ... Printed circuit board, 12 ... Housing, 12d ... Front wall, 12e ... Rear wall, 13 ... Shield, 14 ... Contact, 17 ... Opening part, 21 ... Cylindrical part, 24 ... Terminal part, 25 ... Lead Part, 25a ... connection part, 25b ... orthogonal part, 27 ... wide part (impedance adjusting part), H ... surrounding part.
A connector for a coaxial cable fixed in a state of being placed at a predetermined position on a printed circuit board,
An insulating housing, a conductive shield, and a conductive contact;
The housing has a front wall provided with an opening that communicates the inside and outside of the housing, and a rear wall that supports the shield,
The shield has a substantially cylindrical tubular portion extending from the rear wall of the housing toward the opening, and an enclosing portion that surrounds the contact outside the housing,
The contact includes a substantially cylindrical terminal portion extending toward the opening of the housing in the cylindrical portion, and a substantially plate extending from the rear wall of the housing toward the printed circuit board while being surrounded by the surrounding portion. A lead portion having a shape,
The lead part is provided with an impedance adjusting part that adjusts the impedance of the lead part to be close to the impedance of the terminal part by changing the capacitance between the surrounding part and the lead part,
The coaxial cable connector is formed so that the impedance adjustment portion is formed in a flat plate shape and wider than a portion other than the impedance adjustment portion in the lead portion.
The lead part has an orthogonal part that is bent and deformed toward the printed circuit board so as to be substantially orthogonal to the extending direction of the terminal part, and the impedance adjustment part is provided on the orthogonal part of the lead part. The connector for coaxial cables according to claim 1, wherein the connector is formed.
The coaxial cable connector according to claim 2, wherein the orthogonal portion is bent and deformed at a position closest to a connection portion of the lead portion with the terminal portion.
JP2005221252A 2005-07-29 2005-07-29 Connector for coaxial cable Active JP4684789B2 (en)
JP2005221252A JP4684789B2 (en) 2005-07-29 2005-07-29 Connector for coaxial cable
JP2007035587A JP2007035587A (en) 2007-02-08
JP4684789B2 true JP4684789B2 (en) 2011-05-18
ID=37794567
JP2005221252A Active JP4684789B2 (en) 2005-07-29 2005-07-29 Connector for coaxial cable
JP (1) JP4684789B2 (en)
CN103199385A (en) * 2012-01-06 2013-07-10 星电株式会社 Connector
JP2014165084A (en) * 2013-02-27 2014-09-08 D D K Ltd Receptacle connector
JP6408106B1 (en) * 2017-10-25 2018-10-17 京セラ株式会社 Connectors and electronic devices
JP6450496B1 (en) * 2018-08-29 2019-01-09 京セラ株式会社 Connectors and electronic devices
JP2009301717A (en) * 2008-06-10 2009-12-24 Yazaki Corp Inner terminal
JP5560981B2 (en) * 2010-07-14 2014-07-30 住友電装株式会社 Board shield connector
JP5712611B2 (en) * 2010-12-24 2015-05-07 住友電装株式会社 Board connector
JP5729165B2 (en) * 2011-06-27 2015-06-03 住友電装株式会社 Board connector
JP5830394B2 (en) * 2012-01-26 2015-12-09 ホシデン株式会社 Contact impedance adjustment method, contact and connector equipped with the same
JP5776752B2 (en) * 2013-11-11 2015-09-09 第一精工株式会社 receptacle connector
JP6278782B2 (en) 2014-03-28 2018-02-14 矢崎総業株式会社 Coaxial connector and camera module having the same
JP2020021554A (en) * 2018-07-30 2020-02-06 ホシデン株式会社 connector
JPS61502505A (en) * 1984-06-20 1986-10-30
JPH0660943A (en) * 1992-06-26 1994-03-04 Whitaker Corp:The Coaxial connector assembly
JPH08306435A (en) * 1995-04-28 1996-11-22 Mitsumi Electric Co Ltd Electric connector
JPH1133921A (en) * 1997-07-15 1999-02-09 Hoppo Jubunka Kenkyusho:Kk Storage jig for plate body
JP2001035601A (en) * 1999-07-21 2001-02-09 Yazaki Corp Connector
JP2003007402A (en) * 2001-06-20 2003-01-10 Hirose Electric Co Ltd High-speed transmission electric connector
JP2005503656A (en) * 2001-08-01 2005-02-03 モレックス インコーポレーテッドＭｏｌｅｘ Ｉｎｃｏｒｐｏｒａｔｅｄ Impedance adjusted connector
2005-07-29 JP JP2005221252A patent/JP4684789B2/en active Active
CN103199385B (en) * 2012-01-06 2016-08-31 星电株式会社 Connector
WO2019082607A1 (en) * 2017-10-25 2019-05-02 京セラ株式会社 Connector and electronic apparatus
CN109964372A (en) * 2017-10-25 2019-07-02 京瓷株式会社 Connector and electronic equipment
JP2007035587A (en) 2007-02-08
JP3351363B2 (en) 2002-11-25 Surface mount antenna and communication device using the same
US6997745B2 (en) 2006-02-14 Coaxial electrical connector
US8672711B2 (en) 2014-03-18 Connector including a shield case and a contact at least a part of the contact adjacent to a part of the shield case
JP4889569B2 (en) 2012-03-07 Floating connector
KR100548057B1 (en) 2006-02-01 Surface mount technology antenna apparatus with trio land structure
JP4332494B2 (en) 2009-09-16 Antenna device
EP1480294B1 (en) 2006-07-26 Connector enhanced in electromagnetic shielding function
JP5160970B2 (en) 2013-03-13 Shield connector
2008-05-17 RD02 Notification of acceptance of power of attorney
Ref document number: 4684789