TWI669867B - Coaxial connector - Google Patents

Abstract

Provide miniaturized coaxial connectors.

The coaxial connector (10) includes an outer cover (1) and a curved tubular casing (2). Further, the coaxial connector (10) includes a center contact (3) and a set of disc-shaped dielectrics (4a, 4b). The outer cover (1) has a receiving chamber (11) on one end side thereof into which a coaxial plug (20) can be inserted. The curved tubular casing (2) is fixed inside the cover (1) so as to be substantially parallel to one side surface (91p) of the printed circuit board (9p), and is bent in the axial direction and printed on the other end side of the cover 1 One side surface (91p) of the substrate (9p) faces oppositely. The center contact piece (3) is arranged inside the curved tubular casing (2) along the axis center of the curved tubular casing (2) so as to be coaxial with the curved tubular casing (2). A set of disc-shaped dielectrics (4a, 4b) are housed inside the curved tubular casing (2), and support the center contact (3) at the center. The curved tubular casing (2) is a group of disc-shaped dielectrics (4a, 4b) arranged separately in the axial direction of the center contact (3), and a dielectric is provided between the group of disc-shaped dielectrics (4a, 4b). Air layer (As) with a small electric constant.

Description

Coaxial connector

The present invention relates to a coaxial connector. In particular, the present invention relates to the structure of a coaxial connector that can be mounted on a printed circuit board and that is configured at the opposite side coaxial connector of a coaxial cable terminal to which a coaxial connector can be mounted and removed.

Generally, an electronic vehicle such as an ETC (Electronic Toll Collection System) has a printed circuit board disposed inside. This printed circuit board is mounted with, for example, a circular coaxial connector. The coaxial connector on the opposite side, which is arranged at one end of the coaxial cable, can be attached to and detached from the coaxial connector. The antenna is connected to the other end of the coaxial cable. In addition, by connecting the opposite-side coaxial connector to the coaxial connector, a high-frequency signal can be received from the antenna to the printed circuit board, or a high-frequency signal can be transmitted from the printed circuit board to the antenna.

Generally, the circular coaxial connector is connected with a circular opposite-side coaxial connector that extends a coaxial cable in an outer circumferential direction. The circular coaxial connector is a vertical mounting type connector with an opposite side coaxial connector that can be attached to and detached from one side of a printed circuit board in a vertical direction, which is a so-called top entry type coaxial connector.

On the other hand, an angular opposite-side coaxial connector fixed to the axial direction of the coaxial cable has also been developed. One side of the board is a horizontally mounted connector, which is a so-called side entry type coaxial connector.

In this side-entry coaxial connector, it has been conventionally disclosed that the periphery of the L-shaped center contact is integrated with an L-shaped dielectric material, and is held from the outer peripheral direction by a pair of L-shaped cylindrical split shells This L-shaped dielectric material coaxial connector (see, for example, Patent Document 1).

In addition, in such a side-entry coaxial connector, a coaxial connector has also been disclosed in the conventional technology (for example, refer to Patent Document 2), which is an L-shaped center contact member which is built in an L-shaped dielectric material. The central portion is configured to hold the L-shaped dielectric material from the outer peripheral direction by a pair of L-shaped cylindrical split sleeves with flanges.

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2002-270311

[Patent Document 2] US Patent No. 5116245

In the coaxial connector disclosed in Patent Document 1 or 2, the L-shaped center contact member composed of a thin rod-shaped member having conductivity is continuously wrapped from the middle portion thereof with an L-shaped dielectric material having a dielectric constant greater than air. Cover to the terminal section. In this configuration, there is a problem that it is difficult to transmit a high-frequency signal with a small-sized coaxial connector. In addition, it can be inferred that there will be a need for transmitting high-frequency signals with smaller coaxial connectors in the future. So the above The situation is also the subject of the present invention.

The present invention has been developed in view of such problems, and an object thereof is to provide a coaxial connector that can be miniaturized by interposing an air layer in a center contact member surrounded by a curved cylindrical curved tubular casing.

The inventor of the present invention believes that a group of circular plate-shaped dielectrics which are housed in the curved tube-shaped casing provided inside the cover of the printed circuit board and housed inside the casing and support the center contact at the center are arranged separately. In the axial direction of the casing, the air layer can be interposed in the central contact member surrounded by the curved tubular casing, and the following novel coaxial connector is invented accordingly.

(1) The coaxial connector of the present invention is an opposite side coaxial connector that can be mounted on one side of a printed circuit board and is detachably connected to a terminal of a coaxial cable, and includes a rectangular parallelepiped outer cover and an end The side of the part is provided with a side opening which can be inserted into the receiving chamber of the opposite side coaxial connector; a cylindrical tube-shaped curved tubular sleeve is fixed inside the outer cover to be substantially parallel to one side of the printed substrate, On the other end side of the outer cover, its axial direction is curved to be opposite to one side of the printed substrate; a center contact member is disposed coaxially with the sleeve along the center of the axis of the curved tubular sleeve. The inside of the shell; and a set of disc-shaped dielectrics, which are housed inside the curved tubular casing and support the center contact at the center; the curved tubular casing is a set of the disc-shaped dielectrics arranged separately The central contact is in the axial direction, and an air layer is provided between a group of the disc-shaped dielectrics.

(2) The aforementioned center contact and a set of the aforementioned disc-shaped dielectrics The quality is preferably integrally molded, and the curved tubular casing is composed of a set of semi-cylindrical split casings that surrounds a set of the aforementioned disc-shaped dielectrics from the outer peripheral direction.

(3) The aforementioned curved tubular casing is preferably formed by joining the outer peripheral edges of a group of the aforementioned divided casings with each other by laser welding.

(4) It is preferable that the inner wall of the storage chamber of the outer cover is formed with a latch groove capable of buckling a locking lever provided on the opposite side coaxial connector.

(5) It is preferable that the outer cover further includes a pair of reinforcing tongue plates which can be fixed to both side surfaces of the outer cover and whose bottom surface can be welded to one side surface of the printed substrate.

The coaxial connector of the present invention is provided with a curved tubular casing, which is a group of disc-shaped dielectrics arranged in the axial direction of the center contact, and an air layer is provided between the group of disc-shaped dielectrics. The outer diameter is reduced, and the coaxial connector can be miniaturized.

1‧‧‧ outer cover

2‧‧‧ curved tubular casing

2a, 2b‧‧‧ split casing

3‧‧‧ center contact

3cv‧‧‧Bent part of center contact

4a, 4b‧‧‧‧A group of disc-shaped dielectrics

5‧‧‧ Reinforcing tongue plate

9p‧‧‧printed substrate

10‧‧‧ coaxial connector

11‧‧‧ Containment Room

11d‧‧‧square slot

11r‧‧‧ latch slot in the containment room

12‧‧‧ recess

12h‧‧‧Press into the hole

12w‧‧‧ partition wall

20‧‧‧ coaxial plug (opposite side coaxial connector)

21‧‧‧ Cover

21r‧‧‧Stop lever

22‧‧‧ cylindrical casing

23‧‧‧contact terminal

24a, 24b‧‧‧Dielectric

31‧‧‧contact terminal

32‧‧‧DIP terminal

91p‧‧‧One side of printed substrate

111‧‧‧ protrusion

As‧‧‧air layer

Cb‧‧‧ coaxial cable

Di‧‧‧ Dielectric

Ht‧‧‧through hole

Wb‧‧‧outer conductor

Wc‧‧‧center conductor

Wi‧‧‧ Insulated Sheath

FIG. 1 is a perspective view showing a configuration of a coaxial connector according to an embodiment of the present invention, and shows a state where the coaxial connector is mounted on one side of a printed circuit board.

FIG. 2 is a perspective view showing a configuration of the coaxial connector according to the embodiment, and shows a state where the coaxial connector is mounted on one side of a printed circuit board from the opposite side of FIG. 1.

Fig. 3 is a group showing the configuration of the coaxial connector of the embodiment; Exploded perspective view.

FIG. 4A is a plan view showing the configuration of the outer cover of the coaxial connector according to the embodiment. FIG.

Fig. 4B is a front view showing the structure of the outer cover of the coaxial connector according to the embodiment.

Fig. 4C is a rear view showing the structure of the outer cover of the coaxial connector according to the embodiment.

FIG. 5A is a perspective view showing a housing configuration of the coaxial connector installed in the embodiment, and is a perspective view showing the external appearance of a back surface, an upper surface, and a left side surface. FIG.

FIG. 5B is a structural diagram showing a cover of the coaxial connector installed in the embodiment, and is a perspective view showing the appearance of the back, bottom, and right sides.

FIG. 5C is a perspective view showing the configuration of the outer cover of the coaxial connector installed in the embodiment, and is a perspective view showing the appearance of the back surface and the right side surface.

FIG. 6 is an enlarged perspective view showing a main part of the coaxial connector according to the foregoing embodiment, and shows a state before a central contact member having a set of circular plate-shaped dielectrics is surrounded by a set of split sleeves.

FIG. 7 is a front view showing the configuration of a center contact member mounted on the coaxial connector of the aforementioned embodiment, and shows a state in which it is integrally molded with a group of disc-shaped dielectrics.

Fig. 8 is a perspective view showing a configuration of a center contact member mounted on the coaxial connector of the embodiment.

FIG. 9A is a longitudinal cross-sectional view showing the configuration of the coaxial connector according to the embodiment, and shows a state before the opposite-side coaxial connector is connected.

FIG. 9B is a longitudinal cross-sectional view showing the configuration of the coaxial connector according to the embodiment, and shows a state after the opposite-side coaxial connector is connected.

FIG. 10 is a perspective view showing the configuration of the coaxial connector according to the embodiment, and the connected state of the opposite side coaxial connector is shown in a longitudinal section.

[Form of Implementing Invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Composition of coaxial connector]

First, the configuration of a coaxial connector according to an embodiment of the present invention will be described.

FIG. 1 is a perspective view showing a configuration of a coaxial connector according to an embodiment of the present invention, and shows a state where the coaxial connector is mounted on one side of a printed circuit board. FIG. 2 is a perspective view showing the configuration of the coaxial connector according to the embodiment, and shows the appearance of the coaxial connector mounted on one side of a printed circuit board from the opposite side of FIG. 1.

Fig. 3 is an exploded perspective view showing the assembly of the coaxial connector according to the embodiment. 4A to 4C are diagrams showing the structure of the outer cover of the coaxial connector installed in the foregoing embodiment. FIG. 4A is a top view of the outer cover, FIG. 4B is a front view of the outer cover, and FIG. 4C is a rear view of the outer cover.

5A to 5C are diagrams showing the structure of the outer cover of the coaxial connector installed in the foregoing embodiment; FIG. 5A is a perspective view showing the appearance of the back, top, and left side of the outer cover; FIG. 5B is a back view showing the back, A perspective view of the appearance of the bottom surface and the right side surface. FIG. 5C is a perspective view showing the appearance of the back surface and the right side surface of the cover.

FIG. 6 shows the essentials of the coaxial connector of the aforementioned embodiment. An enlarged perspective view of a dot portion shows a state before a center contact having a set of disc-shaped dielectrics is surrounded by a set of divided casings. FIG. 7 is a front view showing the structure of a center contact member mounted on the coaxial connector of the aforementioned embodiment, and shows a state in which it is integrally molded with a group of disc-shaped dielectrics.

FIG. 8 is a perspective view showing a configuration of a center contact member mounted on the coaxial connector of the embodiment. FIG. 9A and FIG. 9B are longitudinal sectional views showing the structure of the coaxial connector of the aforementioned embodiment. FIG. 9A shows a state before connection of the coaxial coaxial connector, and FIG. 9B shows a state after connection of the coaxial coaxial connector.

FIG. 10 is a perspective view showing the configuration of the coaxial connector according to the embodiment, and the connected state of the opposite side coaxial connector is shown in a longitudinal section.

(Overall composition)

1 to 10, a coaxial connector 10 according to an embodiment of the present invention can be mounted on a side 91p of one of the printed circuit boards 9p, and is disposed on the opposite side coaxial connector (hereinafter referred to as a coaxial connector) of the coaxial cable Cb. Coaxial plug) 20 is detachably connected to it.

Referring again to FIGS. 1 to 10, the coaxial connector 10 includes a rectangular parallelepiped-shaped cover 1 and a metal curved tubular casing 2. In addition, the coaxial connector 10 includes a rod-shaped center contact 3 and a set of disk-shaped dielectrics 4a and 4b.

Referring to FIG. 2 or FIGS. 5A to 5C and FIG. 9A, the outer cover 1 has a receiving chamber 11 on one end side thereof. The storage room 11 is provided with a rectangular opening on one side of the cover 1 so that the coaxial plug 20 can be inserted into the storage room 11 (see FIGS. 9A and 9B).

1 or 3 and FIG. 9A, FIG. 9B, or FIG. 10, the structure of the curved tubular casing 2 is fixed inside the cover 1 so as to be substantially parallel to a side surface 91p of a printed substrate 9p. On one end portion side, the axial direction is bent so as to face one side surface 91p of the printed circuit board 9p. More specifically, one end portion of the curved tubular casing 2 is disposed in the accommodation chamber 11 of the housing 1, and the middle portion of the curved tubular casing 2 passes through the partition wall 12w of the housing 1 and is fixed. The other end portion side of the cover case 2 is configured to bend the axial direction of the curved tubular cover case 2 in the other end portion side of the cover 1 and face the side surface 91 p of the printed substrate 9 p. In the embodiment, the curved tubular casing 2 is composed of a set of semi-cylindrical divided casings 2a, 2b (see FIG. 6).

6 or FIG. 9A, FIG. 9B and FIG. 10, the center contact 3 is disposed inside the curved tubular casing 2. The central contact 3 is arranged along the center of the axis of the curved tubular casing 2 so as to be coaxial with the curved tubular casing 2.

Referring to FIG. 6 or FIG. 7, a group of disc-shaped dielectrics 4 a and 4 b are housed inside the curved tubular casing 2. A set of disc-shaped dielectrics 4a, 4b support the center contact 3 at the center, respectively. The disc-shaped dielectric 4a is disposed on the base end portion side of the contact terminal 31, and the disc-shaped dielectric 4b is disposed on the base end of the DIP terminal 32 that can be soldered to the printed substrate 9p (see FIG. 1 or FIGS. 9A and 9B). The part side, more specifically, is configured to locally support the bent portion 3cv of the center contact 3. The thickness of the disc-shaped dielectric 4a is larger than the thickness of the disc-shaped dielectric 4b. Regarding the arrangement or thickness of the disc-shaped dielectrics 4a and 4b, other arrangement relationships or other thickness relationships can be obtained as needed. In the embodiment, the center contact 3 and a group of disc-shaped dielectrics 4a and 4b are integrally molded.

6 or 9A, 9B, and 10, the curved tubular casing 2 A set of disk-shaped dielectrics 4 a and 4 b are arranged separately in the axial direction of the center contact 3. In this way, the curved tubular casing 2 is provided with an air layer As between a group of disc-shaped dielectrics 4a, 4b.

The coaxial connector 10 according to the embodiment is provided with a curved tubular casing 2 in which a set of circular plate-shaped dielectrics 4a and 4b are arranged separately in the axial direction of the center contact 3 and between the set of circular plate-shaped dielectrics 4a and 4b. With the air layer As, the outer diameter of the sleeve can be reduced, and the coaxial connector can be miniaturized.

(Construction of the cover)

Next, the configuration of the outer cover 1 according to the embodiment will be described. Referring to FIG. 1 to FIG. 5A to FIG. 5C, the outer cover 1 is preferably composed of an insulator, and is molded from an insulating synthetic resin to obtain a rectangular parallelepiped outer cover 1.

Referring to FIGS. 1 to 5A through 5C, the outer cover 1 has a recessed portion 12 that continues to the other side surface and the bottom surface of the receiving chamber 11 on the opposite side. The concave portion 12 can accommodate the curved tubular casing 2. In addition, the cover 1 has a partition wall 12w (see FIG. 4B or FIG. 5C) that partitions the storage chamber 11 from the recessed portion 12. The partition wall 12w is provided with a press-in hole 12h (see FIG. 4C or FIG. 5C).

Referring to FIG. 4C or FIG. 5C, the curved tubular casing 2 can be pressed into the receiving chamber 11 from the recessed portion 12 into the pressing hole 12 h (see FIG. 9A). In this way, the curved tubular casing 2 can be fixed to the outer cover 1.

4C or 5C, a pair of protrusions 111 and 111 are formed in the outer cover 1 from the inner wall of the accommodation chamber 11. The pair of protrusions 111 and 111 can be fitted into a square groove (not shown) provided in the outer cover 21 of the coaxial plug 20 to guide the insertion of the coaxial plug 20 (see FIGS. 9A and 9B). The pair of protrusions 111 and 111 function as a key to prevent the coaxial plug 20 from being inserted by mistake.

Referring to FIG. 9B or FIG. 10, a latch groove 11 r is formed on an inner wall of the accommodation chamber 11 of the cover 1. The locking lever 21r provided in the coaxial plug 20 can be fastened to the latch groove 11r.

1 to 3, the cover 1 further includes a pair of rectangular reinforcing tab plates 5 and 5. 4A, a pair of square grooves 11d and 11d facing each other are formed on both side surfaces of the cover 1. By pressing the reinforcing tongue plate 5 into the pair of square grooves 11d and 11d, the pair of reinforcing tongue plates 5 and 5 can be fixed on both sides of the cover 1. By welding the bottom surface of the reinforcing tongue plate 5 to one side surface 91p of the printed substrate 9p, the cover 1 can be fixed to the printed substrate 9p (see FIG. 1 or FIG. 2).

(Construction of curved tubular casing and split casing)

Next, the configuration of the curved tubular casing 2 and a pair of divided casings 2a, 2b according to the embodiment will be described. Referring to FIG. 6, the split casings 2 a and 2 b are preferably made of a conductive metal body, and the conductive metal body is molded into a shape to obtain a semi-cylindrical set of split casings 2 a and 2 b.

Referring to FIG. 6, the assembling of the curved tubular casing 2 is preferably to divide the casing on the other side in a state in which the center contact 3 having a set of disc-shaped dielectrics 4 a and 4 b is accommodated in the divided casing 2 a on one side. 2b surrounds the center contact 3 having a set of disc-shaped dielectrics 4a, 4b. By joining the outer peripheral edges of a group of divided sleeves 2a, 2b with each other by laser welding, a seamless tubular curved sleeve 2 can be obtained. Thus, high-frequency signals can be easily transmitted to the center contact 3. The center of the opening at one end of the curved tubular casing 2 is provided with a contact terminal 31, and the center of the opening at the other end of the curved tubular casing 2 is provided with a DIP terminal 32.

Referring to FIG. 9A, FIG. 9B, or FIG. 10, another portion of the curved tubular casing 2 One end portion (end edge portion) is preferably soldered to one side surface 91p of the printed substrate 9p, so that the curved tubular casing 2 can be electrically connected to a ground pattern (not shown) formed on the printed substrate 9p.

(Construction of center contact)

Next, the configuration of the center contact 3 of the embodiment will be described. Referring to FIGS. 6 to 8, the center contact 3 is preferably made of a metal rod having conductivity, and bending the metal rod having conductivity to obtain a center contact in which the other end portion is curved to one end portion. Piece 3. Although the center contact 3 is preferably made of a copper alloy, it is not limited to a copper alloy.

6 to 8, the center contact 3 has a contact terminal 31 at one end and a DIP terminal 32 at the other end. The contact terminal 31 can be connected to a center contact 23 disposed on the coaxial plug 20 (see FIG. 9A, FIG. 9B, or FIG. 10).

Referring to FIG. 9A, FIG. 9B, or FIG. 10, the DIP terminal 32 is connected to a through hole Ht formed in the printed substrate 9p. Although the DIP terminal 32 can be mounted through the printed circuit board 9p, it can also be mounted on the surface of the substrate together with the other end portion of the curved tubular casing 2 after being inserted into the through hole Ht.

(Composition of Opposite Coaxial Connector)

Next, the configuration of the coaxial plug 20 according to the embodiment will be described. Referring to FIG. 9A, FIG. 9B, or FIG. 10, the coaxial plug 20 is configured at a terminal of the coaxial cable Cb. The coaxial cable Cb is composed of a round central conductor Wc formed by a single wire or a twisted wire, a dielectric Di such as a fluorine resin surrounding the central conductor Wc, an external conductor Wb such as a twisted wire surrounding the dielectric Di, And an insulating sleeve Wi that covers and protects the outer conductor Wb.

9A, 9B, or 10, the coaxial plug 20 is provided with a long The rectangular parallelepiped cover 21 and the metallic cylindrical case 22. The coaxial plug 20 includes a center contact 23 and a pair of disk-shaped dielectrics 24a and 24b.

Referring to FIG. 9A, FIG. 9B or FIG. 10, the cover 22 is supported by the outer cover 21 in the middle. One end of the cover case 22 is connected to the external conductor Wb. The other end portion of the cover case 22 is configured to be connectable to the cover case 2. One end of the center contact 23 is connected to the center conductor Wc. The other end of the center contact 23 is configured to be connectable to the center contact 3. A group of dielectrics 24a and 24b are arranged inside the case 22 so that the center contact 23 and the case 22 are coaxial.

[The role of the coaxial connector]

Next, functions and effects of the coaxial connector 10 according to the embodiment will be described. 1 to 10, the coaxial connector 10 includes a curved tubular casing 2 in which a set of disc-shaped dielectrics 4a, 4b are arranged separately in the axial direction of the center contact 3, and a set of disc-shaped dielectrics 4a. There is an air layer As between 4 and 4b, so the outer diameter of the casing can be reduced, and the coaxial connector can be miniaturized.

Referring to FIG. 9A, FIG. 9B, or FIG. 10, the coaxial connector 10 according to the embodiment solders the other end portion (edge portion) of the casing 2 to the side 91p of one side of the printed circuit board 9p, so the impedance of the terminal portion can be suppressed Mismatch.

Further referring to FIG. 6 or FIGS. 9A, 9B, and 10, the coaxial connector 10 of the embodiment can be obtained by joining the outer peripheral edges of a group of divided sleeves 2a, 2b with each other by laser welding to obtain a seamless bend.管 套 壳 2。 Tubular casing 2. Moreover, it is easier to transmit high-frequency signals to the center contact 3.

Claims (6)

A coaxial connector can be installed on one side of a printed circuit board, and can be detachably connected to an opposite side coaxial connector configured at a terminal of a coaxial cable. The coaxial connector includes a rectangular parallelepiped cover and an end portion. The side opening is a receiving room into which the opposite coaxial connector can be inserted; the cylindrical tube-shaped curved tubular casing is fixed inside the outer cover to be substantially parallel to one side of the printed substrate, and in the outer cover At the other end side, the axial direction is curved to be opposite to one side of the printed substrate; the center contact is arranged coaxially with the sleeve center along the axis of the curved tubular sleeve and inside the sleeve; And a set of circular plate-shaped dielectrics are housed inside the curved tubular casing, and support the center contact at the central portion, and the curved tubular casing is arranged so that a set of the circular plate-shaped dielectrics are separately arranged in the center In the axial direction of the contact, an air layer is provided between a group of the aforementioned disc-shaped dielectrics. The coaxial connector according to claim 1, wherein the center contact piece and a group of the above-mentioned disk-shaped dielectrics are integrally molded; the curved tube-shaped casing is formed by enclosing the group of the above-mentioned disk-shaped dielectrics from an outer circumferential direction. A set of semi-cylindrical split casings. The coaxial connector according to claim 2, wherein the curved tubular casing is formed by joining outer peripheral edges of a group of the divided casings to each other by laser welding. The coaxial connector according to any one of claims 1 to 3, wherein the inner wall of the accommodating chamber of the outer cover is formed with a latch groove that can be fastened by a locking lever provided on the opposite side coaxial connector. The coaxial connector according to any one of claims 1 to 3, wherein the outer cover further includes a pair of reinforcing tab plates, and the pair of reinforcing tab plates are fixed on both sides of the cover, and the bottom surface can be welded On one side of the printed substrate. According to the coaxial connector of claim 4, wherein the outer cover further includes a pair of reinforcing tab plates, the pair of reinforcing tab plates are fixed on both sides of the cover, and the bottom surface can be welded to one side of the printed substrate.