TWI648929B - Installation structure of coaxial connector - Google Patents

Abstract

Provide a mounting structure for a coaxial connector whose coaxial connector and printed circuit board impedance can be easily matched.

The coaxial connector (10) includes an outer cover (1) and a curved tubular casing (2). The casing (2) is provided with a center contact (3) and a set of circular plate-shaped dielectrics (4a, 4b) inside. The housing (1) has a receiving chamber (11) into which a coaxial plug (80) can be inserted. The curved tubular casing (2) is configured to be fixed inside the outer cover (1) so as to be substantially parallel to the printed substrate (9p), and the axial direction of the outer cover (1) is bent to print One side surface 91p of the substrate 9p. The central contact (3) is arranged coaxially with the curved tubular casing (2). A group of disc-shaped dielectrics (4a, 4b) are separately arranged in the axial direction of the center contact (3), and an air layer As is provided between the group of disc-shaped dielectrics (4a, 4b). The connection terminal 32 of the center contact (3) is bonded to the printed circuit board 9p, and the front edge of the curved tubular casing 2 surrounding the connection terminal 32 is mounted on the surface of the printed circuit board 9p.

Description

   Installation structure of coaxial connector   

The invention relates to a mounting structure of a coaxial connector. In particular, the present invention relates to a mounting structure of a coaxial connector that can be mounted on a printed circuit board and that can be attached to and detached from a coaxial connector that is constructed at a target side of a coaxial cable terminal.

Generally, an electronic vehicle such as an ETC (Electronic Toll Collection System) has a printed circuit board disposed inside. A circular coaxial connector is mounted on the printed circuit board, for example. The object-side coaxial connector, which is constructed at one end of the coaxial cable, can be attached to and detached from the coaxial connector. An antenna is connected to the other end of the coaxial cable. By connecting the object-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.

Such a circular coaxial connector is generally connected to a circular object-side coaxial connector that extends a coaxial cable in an outer circumferential direction. This circular coaxial connector is a so-called top-entry type coaxial connector, which is a vertical mounting type connector in which the object-side coaxial connector can be detached from one side of a printed circuit board in a vertical direction.

On the other hand, an angular object-side coaxial connector fixed to the axial direction of a coaxial cable has also been developed. It is a horizontally mounted connector that can be attached to and detached from one side of a printed circuit board from the horizontal direction. -entry type) coaxial connector.

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

Prior art literature Patent literature

Patent Document 1 US Patent No. 5116245

In the coaxial connector disclosed in Patent Document 1, an L-shaped center contact made of a conductive thin-diameter rod-shaped member is continuously surrounded by an L-shaped dielectric material having a dielectric constant greater than air from a middle portion to a terminal portion. . This configuration has a problem that it is difficult to transmit a high-frequency signal with a small coaxial connector. In the future, there will be a need for a coaxial connector for easier transmission of high-frequency signals.

Furthermore, in the coaxial connector disclosed in Patent Document 1, the center contact is surrounded by a pair of flanged L-shaped cylindrical split sleeves via the L-shaped dielectric material on the coaxial. The end of the L-shaped cylindrical split sleeve is electrically connected (DIP connected) to the printed circuit board through a set of DIP terminals provided on the flange portion. Therefore, there is a problem that the peripheral ends of the cylinders of the pair of L-shaped cylindrical split casings may be electrically disconnected from the printed circuit board 9p in many cases.

The coaxial connector disclosed in Patent Document 1 also has a concern that the impedance of the transmission path of the coaxial connector and the impedance of the printed circuit board do not match. A coaxial connector mounting structure in which the impedance of the transmission path of the coaxial connector and the impedance of the printed circuit board can easily be matched is highly demanded. Therefore, the above-mentioned situation is also a problem 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 mounting structure in which impedances of a coaxial connector and a printed circuit board can be easily matched.

The inventor believes that a curved tubular casing provided inside the cover of the printed substrate and provided substantially parallel to one side surface of the printed substrate, and whose end is bent to the printed substrate, is housed inside the casing In addition, a group of disc-shaped dielectrics supported by the center contact at the center portion are separately arranged in the axial direction of the casing, and the front edge of the curved tubular casing is mounted on the surface of the printed substrate. The impedance of the coaxial connector and the printed substrate is It can be easily matched, and based on this finding, the invention of the installation structure of the novel coaxial connector as described below is finally completed.

(1). In the installation structure of the coaxial connector of the present invention, the coaxial connector can be installed on one side of the printed circuit board, and the coaxial connector constructed on the object side of the coaxial cable terminal is detachably connected to it, It includes: a hexahedron-shaped cover with a side opening on one end side to accommodate a receiving chamber into which the coaxial connector on the object side can be inserted; and a curved tubular casing that is fixed inside the cover and one of the printed substrates. The side surface is substantially parallel, and at the other end side of the cover, the axial direction is bent to one side of the printed substrate; the center contact is disposed coaxially with the sleeve along the center of the axis of the curved tubular sleeve. Inside the curved tubular casing; and a set of disc-shaped dielectrics housed inside the curved tubular casing, and supporting the center contact at the central portion; the curved tubular casing is tied at one end And the other end portion, a group of the aforementioned disc-shaped dielectrics are arranged separately in the axial direction of the center contact, and an air layer is provided between the group of the aforementioned disc-shaped dielectrics; The heart contact has a connection terminal that is connected to the connection portion of the printed substrate. At the other end of the curved tubular case, the front edge of the curved tubular case that surrounds the connection terminal of the center contact is joined. On one side of the printed substrate.

(2) In the mounting structure of the coaxial connector (1), it is preferable that the connection portion of the printed substrate includes a through hole, and the axial direction of the curved tubular casing is bent to face one side of the printed substrate. The connection terminal of the center contact is connected to the through hole.

(3) In the mounting structure of the coaxial connector described in (1), preferably, the connection portion of the printed substrate includes a pattern on a surface of the substrate, and an axial direction of the curved tubular casing is close to one side of the printed substrate. The method lowers and inclines, and the connection terminals of the center contact are joined to the pattern.

(4). In the mounting structure of the coaxial connector according to any one of the above (1) to (3), it is preferable that the center contact piece and a group of the aforementioned disc-shaped dielectric systems are integrally molded; The shell is composed of a set of semi-cylindrical split sleeves that surrounds a set of the aforementioned disc-shaped dielectrics from the outer peripheral direction.

In the installation structure of the coaxial connector of the present invention, since the front edge of the cover is connected to one side of the printed substrate, compared with the conventional DIP connection, impedance matching between the coaxial connector and the printed substrate becomes easier.

Furthermore, the mounting structure of the coaxial connector of the present invention is provided with a curved tubular sleeve, which is a group of disc-shaped dielectrics arranged separately in the axial direction of the center contact, and is arranged between a group of disc-shaped dielectrics. With the air layer, the outer diameter of the housing can be reduced, and the coaxial connector can be miniaturized.

1‧‧‧ outer cover

2, 6‧‧‧ curved tubular casing

3, 7‧‧‧ center contact

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

9p‧‧‧printed substrate

10, 20‧‧‧ coaxial connector

11‧‧‧ Containment Room

32‧‧‧connection terminal

80‧‧‧ coaxial plug (coaxial connector on the object side)

91p‧‧‧One side of printed substrate

As‧‧‧air layer

Cb‧‧‧ coaxial cable

Ht‧‧‧through hole

FIG. 1 is a perspective view showing a configuration of a coaxial connector mounting structure according to a first 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 a coaxial connector mounting structure according to the first embodiment. The appearance of the coaxial connector mounted on one side of a printed circuit board is shown from the opposite side of FIG. 1.

Fig. 3 is an exploded perspective view showing the structure of the coaxial connector mounting structure according to the first embodiment.

FIG. 4A is a plan view showing the structure of a cover that is mounted on the coaxial connector mounting structure of the first embodiment. FIG.

FIG. AB is a front view showing the structure of a cover that is mounted on the coaxial connector mounting structure of the first embodiment.

FIG. 4C is a rear view showing the structure of the cover attached to the coaxial connector mounting structure of the first embodiment.

FIG. 5A is a perspective view showing the structure of a housing installed in the coaxial connector mounting structure of the first embodiment, and is a perspective view showing the appearance of the back, top, and left sides.

FIG. 5B is a structural diagram of a housing showing a mounting structure of the coaxial connector according to the first embodiment, and is a perspective view showing the appearance of the back, bottom, and right sides.

FIG. 5C is a structural diagram of a housing showing a mounting structure of the coaxial connector according to the first 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 a mounting structure of the coaxial connector according to the first embodiment, and shows a state before a central contact member surrounded by a set of disc-shaped dielectrics is surrounded by a set of divided sleeves.

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

FIG. 8 is a perspective view showing a configuration of a center contact member mounted on the coaxial connector mounting structure of the first embodiment.

FIG. 9A is a vertical cross-sectional view showing the configuration of the coaxial connector mounting structure according to the first embodiment, and shows a state before the object-side coaxial connector is connected.

FIG. 9B is a vertical cross-sectional view showing the configuration of the coaxial connector mounting structure according to the first embodiment, and shows the state after the object-side coaxial connector is connected.

FIG. 10A is a perspective view showing the configuration of the coaxial connector mounting structure according to the first embodiment, and is a longitudinal section showing a state after the coaxial connector on the object side is connected. FIG.

FIG. 10B is an enlarged view showing a main part of FIG. 10A.

FIG. 11A is a perspective view showing a configuration of a coaxial connector mounting structure according to a second embodiment of the present invention, and is a longitudinal section showing a state where the coaxial connector on the object side is connected.

FIG. 11B is an enlarged view showing a main part of FIG. 11A.

Embodiment of the invention

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

    [First Embodiment]         (Construction of mounting structure of coaxial connector)    

First, the configuration of the mounting structure of the coaxial connector according to the first embodiment of the present invention will be described.

FIG. 1 is a perspective view showing a structure of a coaxial connector mounting structure according to a first 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 structure of a coaxial connector mounting structure according to the first embodiment. The appearance of the coaxial connector mounted on one side of a printed circuit board is shown from the side opposite to FIG. 1.

Fig. 3 is an exploded perspective view showing the assembly structure of the coaxial connector according to the first embodiment. 4A to 4C are structural diagrams of a cover showing a mounting structure of the coaxial connector according to the first embodiment; FIG. 4A is a plan view of the cover; FIG. 4B is a front view of the cover; and FIG. 4C is a rear view of the cover.

5A to 5C are views showing the structure of a cover installed in the coaxial connector mounting structure of the first embodiment. FIG. 5A is a perspective view showing the appearance of the back, top, and left side of the cover, and FIG. 5B is a view showing the cover. An oblique view of the appearance of the back, bottom, and right sides. FIG. 5C is an oblique view of the appearance of the back and right side of the cover.

FIG. 6 is an enlarged perspective view showing a main part of a mounting structure of the coaxial connector according to the first embodiment, and shows a state before the central contact member surrounded by a set of disc-shaped dielectrics is surrounded by a set of divided sleeves. FIG. 7 is a front view showing the structure of a center contact member mounted on the coaxial connector mounting structure of the first 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 the structure of a center contact member mounted on the coaxial connector mounting structure of the first embodiment. FIGS. 9A and 9B are longitudinal sectional views showing the structure of a coaxial connector mounting structure according to the first embodiment. FIG. 9A shows the state before the coaxial connector on the object side is connected, and FIG. 9B shows the state after the coaxial connector on the object side is connected. .

FIG. 10A and FIG. 10B are perspective views showing the structure of the coaxial connector mounting structure of the first embodiment. FIG. 10A is a vertical section showing a state after the coaxial connector on the object side is connected, and FIG. 10B is an enlarged view of a main part of FIG. 10A .

    (Overall composition)    

Referring to FIGS. 1 to 10A and 10B, the coaxial connector 10 according to the first embodiment of the present invention can be mounted on a side 91p of one side of the printed circuit board 9p, and is configured on the object-side coaxial connector of the coaxial cable Cb terminal ( Hereinafter, referred to as a coaxial plug) 80 is detachably connected thereto.

1 to 10A and 10B, the coaxial connector 10 includes a hexahedron-shaped cover 1 and a metal-bent 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 includes a storage chamber 11 on one end side thereof. The storage room 11 is formed with a rectangular opening on one side of the cover 1, and the coaxial plug 80 can be inserted into the storage room 11 (see FIGS. 9A and 9B).

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

Referring to FIG. 6 or FIGS. 9A and 9B and FIGS. 10A and 10B, 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 each center portion. 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 connection terminal 32 that can be soldered to the printed substrate 9p (see FIG. 1 or FIGS. 9A and 9B). On the part side, in more detail, the bent portion 3cv of the center contact 3 is arranged to be partially supported. The thickness of the disc-shaped dielectric 4a is larger than the thickness of the disc-shaped dielectric 4b. The arrangement or thickness of the disc-shaped dielectrics 4a and 4b may be other arrangements or other thicknesses depending on the needs. In the embodiment, the center contact 3 is integrally molded with a group of disc-shaped dielectrics 4a and 4b.

6 or 9A, 9B and 10A, 10B, the curved tubular casing 2 is arranged between one end portion and the other end portion, and a group of disc-shaped dielectrics 4a, 4b are arranged at the center and contacted separately. The axis direction of piece 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 first embodiment is provided with a curved tubular casing 2 in which a set of circular plate-shaped dielectrics 4a, 4b are arranged in the axial direction of the center contact 3, and are arranged in a set of circular plates. An air layer As is provided between the dielectrics 4a and 4b. Therefore, according to this structure, the outer diameter of the sleeve can be reduced, and the coaxial connector can be miniaturized.

10A and 10B, the other end portion (end edge portion or front end edge) of the curved tubular casing 2 is soldered to one side surface 91p of the printed circuit board 9p. That is to say, at the other end of the curved tubular casing 2, the front edge of the curved tubular casing 2 surrounding the connection terminal 32 of the center contact is mounted on the surface of one side 91p of the printed substrate 9p, and is electrically connected to For example, a ground pattern is not shown. The connection terminal 32 of the center contact 2 is here soldered as a DIP terminal to a through hole Ht formed in the printed substrate 9p.

10A and 10B, the mounting structure of the coaxial connector 10 according to the first embodiment is that the front end edge of the curved tubular casing 2 is welded to one side 91p of the printed circuit board 9p. With the DIP connection formed by the DIP terminal of the edge part, impedance matching between the coaxial connector 10 and the printed circuit board 9p becomes easy.

    (Construction of the cover)    

Next, the configuration of the cover 1 according to the first 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 a synthetic resin having insulation properties is molded to obtain a hexahedral outer cover 1.

Referring to FIGS. 1 to 5A to 5C, the outer cover 1 has a recessed portion 12 that continues from the other side surface and the bottom surface of the receiving chamber 11 on the opposite side. The curved tubular casing 2 can be received in the recessed portion 12. In addition, the cover 1 has a partition wall 12w (see FIG. 4B or FIG. 5C) that partitions the storage chamber 11 and 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 are fitted in a square groove (not shown) provided in the outer cover 81 constituting the coaxial plug 80 to guide the insertion of the coaxial plug 80 (see FIGS. 9A and 9B). The pair of protrusions 111 and 111 function as a key to prevent the coaxial plug 80 from being inserted by mistake.

Referring to FIG. 9B or FIGS. 10A and 10B, a latch groove 11 r is formed on an inner wall of the accommodation chamber 11 of the cover 1. The locking lever 81r provided in the coaxial plug 80 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 11 d and 11 d 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 11 d and 11 d, 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 circuit board 9p, the cover 1 can be fixed to the printed circuit board 9pp (see FIG. 1 or FIG. 2).

    (Structure of the curved tubular casing and the divided casing according to the first embodiment)    

Next, the configuration of the curved tubular casing 2 and the pair of divided casings 2a and 2b according to the first embodiment will be described. Referring to FIG. 6, the split casings 2 a and 2 b are preferably formed of a conductive metal body, and the conductive metal body is molded 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 carried out with the center contact 3 having a set of disc-shaped dielectrics 4a, 4b housed in one of the divided casings 2a, and surrounded by the other divided casing 2b. The center contact 3 is covered with a set of disc-shaped dielectrics 4a, 4b. By using laser welding to join the outer peripheral ends of a group of divided casings 2a, 2b to each other, a seamless cylindrical curved tubular casing 2 can be obtained. Therefore, the high-frequency signal is easily transmitted to the center contact 3. A contact terminal 31 is arranged at the center of the opening at one end of the curved tubular case 2, and a connection terminal (DIP terminal) 32 is arranged at the center of the opening at the other end of the curved tubular case 2.

Referring to FIG. 9A, FIG. 9B, or FIG. 10A, FIG. 10B, the other end portion (end edge portion or front end edge) of the curved tubular casing 2 is preferably welded to one side 91p of the printed substrate 9p so that The case 2 may 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 according to the first embodiment will be described. Referring to FIGS. 6 to 8, the center contact 3 is preferably constituted by a metal rod having conductivity. By bending a conductive metal rod, the center contact 3 with the other end bent at a substantially right angle with respect to the one end can be obtained. 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 a base end portion and a connection terminal 32 at a front end portion. The contact terminal 31 can be connected to a center contact 83 disposed on the coaxial plug 80 (see FIGS. 9A and 9B or FIGS. 10A and 10B).

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

    (Construction of the object-side coaxial connector)    

Next, the configuration of the coaxial plug 80 according to the first embodiment will be described. Referring to FIG. 9A, FIG. 9B or FIG. 10A, FIG. 10B, the coaxial plug 80 is configured at the terminal of the coaxial cable Cb. The coaxial cable Cb is a round central conductor Wc composed of a single wire or a stranded wire, a dielectric Di such as a fluororesin surrounding the central conductor Wc, an outer conductor Wb such as a twisted wire surrounding the dielectric Di, and a coating to protect the outside The conductor Wb is made of an insulating sheath Wi.

Referring to FIGS. 9A and 9B or FIGS. 10A and 10B, the coaxial plug 80 includes a hexahedron-shaped cover 81 and a metal cylindrical case 82. The coaxial plug 80 includes a center contact 83 and a pair of disk-shaped dielectrics 84a and 84b.

9A, FIG. 9B, or FIG. 10A, FIG. 10B, the sleeve 82 is supported by its middle portion on the cover 81. One end of the cover 82 is connected to the external conductor Wb. The other end portion of the sleeve 82 can be connected to one side end of the curved tubular sleeve 2. One end of the center contact 83 is connected to the center conductor Wc. The other end of the center contact member 83 can be connected to the center contact member 3. A group of dielectrics 84a and 84b are arranged inside the cover 82 such that the center contact 83 and the cover 82 become coaxial.

    [Effect of the mounting structure of the coaxial connector of the first embodiment]    

Next, operations and effects of the coaxial connector 10 according to the first embodiment will be described. Referring to FIGS. 1 to 10A and 10B, the coaxial connector 10 is provided with a curved tubular casing 2 in which a group of disc-shaped dielectrics 4a, 4b are arranged separately in the axial direction of the center contact 3, and is arranged in a group of discs. An air layer As is provided between the dielectrics 4a and 4b, so that the outer diameter of the casing can be reduced, and the coaxial connector 10 can be miniaturized. In addition, referring to FIG. 9A, FIG. 9B, or FIG. 10A, FIG. 10B, the conveying path constituted by the curved tubular casing 2 and the center contact 3, the path from the outer cover 1 to the side 91p of one of the printed substrates 9p is drawn with a gentle curve. Bend in a way that makes impedance matching easy.

9A, FIG. 9B, or FIG. 10A, FIG. 10B, the coaxial connector 10 according to the first embodiment is formed by welding the front end edge of the curved tubular casing 2 to a side surface 91p of the printed circuit board 9p, and conventionally. Compared with the DIP connection, impedance matching of the coaxial connector 10 and the printed circuit board 9p becomes easy.

6 or FIG. 9A, FIG. 9B, and FIG. 10A, FIG. 10B, the coaxial connector 10 according to the first embodiment uses the laser welding to connect the outer peripheral edges of a group of split sleeves 2a, 2b to each other. The joint can be obtained, so that a seamless cylindrical curved tubular casing 2 can be obtained. Therefore, the high-frequency signal is easily transmitted to the center contact 3.

    [Second Embodiment]         (Construction of Coaxial Connector Mounting Structure)    

Next, the configuration of the coaxial connector mounting structure according to the second embodiment of the present invention will be described.

11A and 11B are perspective views showing the structure of a coaxial connector mounting structure according to a second embodiment of the present invention, and FIG. 11A is a longitudinal section of the object-side coaxial connector after being connected, and FIG. 11B is an enlarged view of a main part of FIG. 11A .

In addition, components having the same reference numerals as those used in the first embodiment are assumed to have the same function, and may be omitted in the following description.

    (Overall composition)    

11A and 11B, the coaxial connector 20 according to the second embodiment of the present invention can be mounted on a side 91p of one side of the printed circuit board 9p, and configured as a coaxial connector (hereinafter, referred to as a target) of a coaxial cable Cb terminal. Coaxial plug) 80 can be removably connected to it.

11A and 11B, the coaxial connector 20 includes a hexahedron-shaped cover 1 and a metal-bent tubular casing 6. In addition, the coaxial connector 20 includes a rod-shaped center contact 7 and a set of disk-shaped dielectrics 4a and 4b.

The curved tubular casing 6 is configured to be fixed inside the cover 1 to be substantially parallel to one side surface 91p of the printed substrate 9p, and at the other end side of the cover 1, the axial direction is bent to the printed substrate 9p. One side is 91p. More specifically, one end portion of the curved tubular casing 2 is disposed in the storage chamber 11 of the outer cover 1; the middle portion of the curved tubular casing 2 is passed through and fixed to the partition wall 12w of the outer cover 1; On the other end side, the other end side of the curved tubular casing 2 lowers and tilts the axial direction of the curved tubular casing 6 close to one side 91p of the printed substrate 9p, and reaches the one side 91p of the printed substrate 9p. . In the embodiment, the curved tubular casing 6 is constituted by a set of semi-cylindrical divided casings 6a, 6b.

The center contact 7 is disposed inside the curved tubular casing 6. The center contact 7 is arranged along the center of the axis of the curved tubular casing 6 so as to be coaxial with the curved tubular casing 6.

11A and 11B, a set of disc-shaped dielectrics 4 a and 4 b are housed inside the curved tubular casing 6. A set of disc-shaped dielectrics 4a, 4b support the center contact 7 at each center portion. The disc-shaped dielectric 4a is disposed on the base end portion side of the contact terminal 71, and the disc-shaped dielectric 4b is disposed on the base end portion side of the connection terminal 72 (more detailed and In other words, the descending and inclined portion of the center contact 7 is configured to be locally supported). 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 arrangements or other thickness relationships may be adopted as necessary. In the embodiment, the center contact 7 and a group of the disc-shaped dielectrics 4a and 4b are integrally molded.

11A and 11B, the curved tubular casing 6 is a group of disc-shaped dielectrics 4 a and 4 b arranged between one end and the other end in the axial direction of the center contact 7. In this way, the curved tubular casing 6 is provided with an air layer As between a group of disc-shaped dielectrics 4a, 4b.

The coaxial connector 20 according to the second embodiment is provided with a pair of disk-shaped dielectrics 4a, 4b arranged in the axial direction of the center contact 7, and an air layer is provided between the group of disk-shaped dielectrics 4a, 4b. As, the curved tubular casing 6 of As, with this configuration, the outer diameter of the casing can be further reduced, and the coaxial connector can be miniaturized.

11A and 11B, the other end portion (end edge portion or front end edge) of the curved tubular casing 6 is soldered to one side surface 91p of the printed circuit board 9p. In other words, the curved casing 6 has its front edge mounted on the surface of the printed circuit board 9p, and is electrically connected to a ground pattern (not shown), for example. The center contact 7 has a connection terminal 72 at a front end thereof that can be joined to a connection portion of the printed circuit board 9p. Here, the connection terminal 72 is soldered to a pattern formed on one side surface 91p of the printed circuit board 9p as a surface mount terminal.

11A and 11B, the coaxial connector 20 according to the second embodiment is welded to the side edge 91p of the printed circuit board 9p by welding the front edge of the curved tubular casing 6 to the conventional DIP provided on the flange portion of the casing. Compared with the DIP connection of the terminals, impedance matching of the coaxial connector 20 and the printed circuit board 9p becomes easier.

    (Structure of the curved tubular casing and the divided casing according to the second embodiment)    

Next, the configuration of the curved tubular casing 6 and the pair of divided casings 6a and 6b according to the second embodiment will be described. Referring to FIGS. 11A and 11B, the split sleeves 6a and 6b are preferably formed of a conductive metal body. By forming the conductive metal body into a shape, a semi-cylindrical set of split sleeves 6a and 6b can be obtained. .

11A and 11B, the assembly of the curved tubular casing 2 is preferably performed in a state where the center contact 7 having a set of disc-shaped dielectrics 4a, 4b is accommodated in one of the divided casings 6a, and the other divided casing is used. The case 6b surrounds a central contact 7 having a set of disc-shaped dielectrics 4a, 4b. By using laser welding to join the outer peripheral edges of a group of divided casings 6a, 6b to each other, a seamless cylindrical curved tubular casing 6 can be obtained. Then, the high-frequency signal will be easily transmitted to the center contact 7. A contact terminal 71 is disposed at an opening center of one side end portion of the curved tubular casing 6, and a connection terminal (surface-mounted terminal) 72 is disposed at an opening center of the other end portion of the curved tubular casing 6.

11A and 11B, the other end portion (end edge portion or front edge) of the curved tubular casing 6 is preferably soldered to one side 91p of the printed substrate 9p, so that the curved tubular casing 6 can be electrically connected. A ground pattern (not shown) formed on the printed substrate 9p.

    (Construction of center contact)    

Next, the configuration of the center contact 7 according to the second embodiment will be described. Referring to FIGS. 11A and 11B, the center contact 7 is preferably composed of a conductive metal rod. By bending the conductive metal rod, a center at which the other end portion is bent by about 45 degrees with respect to the one end portion can be obtained. Contacts 7. Although the center contact 7 is preferably made of a copper alloy, it is not limited to a copper alloy.

11A and 11B, the center contact 7 has a contact terminal 71 at a base end portion and a connection terminal (surface mount terminal) 72 at a front end portion. The contact terminal 71 can be connected to a center contact 83 disposed on the coaxial plug 80.

11A and 11B, the connection terminal (surface-mounting terminal) 72 has its front end portion disposed along one side surface 91p of the printed circuit board 9p, and can be mounted on the surface of one side surface 91p of the printed circuit board 9p. Accordingly, the connection terminal (surface-mounting terminal) 72 can be mounted on the surface of the substrate together with the front edge of the curved tubular casing 6.

    [Effect of the mounting structure of the coaxial connector of the second embodiment]    

Next, operations and effects of the coaxial connector 20 according to the second embodiment will be described. 11A and 11B, the coaxial connector 20 is provided with a group of disk-shaped dielectrics 4a, 4b arranged in the axial direction of the center contact 7, and air is provided between the group of disk-shaped dielectrics 4a, 4b. As the curved tubular casing 6 with layer As, the outer diameter of the casing can be reduced, and the coaxial connector 20 can be miniaturized. In addition, the conveying path formed by the curved tubular casing 6 and the center contact 7 is inclined in a gentle curve so that the path from the cover 1 to the side 91p of the printed circuit board 9p is inclined, so impedance matching becomes easy. .

11A and 11B, the coaxial connector 20 of the second embodiment is welded to the side edge 91p of the printed circuit board 9p by welding the front edge of the curved tubular casing 6 to the coaxial connection compared to the conventional DIP connection. The impedance matching between the device 20 and the printed circuit board 9p becomes easy.

Furthermore, referring to FIG. 11A and FIG. 11B, the coaxial connector 20 of the second embodiment is connected to the outer peripheral edges of a group of divided casings 6a, 6b by laser welding, so that a seamless cylindrical shape can be obtained.弯管 套 壳 6。 The curved tubular casing 6. Therefore, high-frequency signals are easily transmitted to the center contact 7.

When comparing FIG. 10A, FIG. 10B, and FIG. 11A and FIG. 11B, the curved tubular casing 2 and the center contact 3 of the first embodiment are bent at a substantially right angle as a curved part by drawing a gentle curve. The curved tubular casing 6 and the central contact 7 of the second embodiment use a predetermined angle (for example, 45 degrees) smaller than a right angle and a gentle bend as the bent portion, and they are inclined downward toward one side 91p of the printed substrate 9p. Differences. Thereby, the coaxial connector 20 of the second embodiment can ensure the linearity of the transmission path, and the signal can be transmitted to the printed circuit board 9p at a higher speed.

Claims (4)

A coaxial connector installation structure. The coaxial connector can be installed on one side of a printed circuit board, and the coaxial connector configured on the object side of the coaxial cable terminal is detachably connected to the coaxial connector. The coaxial connector has a hexahedron shape. The outer cover is provided at one end with a side surface opened to receive the receiving chamber of the coaxial connector on the object side; the curved tubular casing is fixed inside the outer cover so as to be substantially parallel to one side of the printed circuit board, and The axial direction of the other end portion of the outer cover is curved to one side of the printed circuit board; the center contact is arranged along the axis center of the curved tubular casing, and is coaxially disposed on the curved tubular casing. An inner portion; and a set of disc-shaped dielectrics housed inside the curved tubular casing, and supporting the central contact member at the central portion, and the curved tubular casing is tied between one end and the other end A set of the aforementioned disc-shaped dielectrics are arranged separately in the axial direction of the center contact, and an air layer is provided between the set of the aforementioned disc-shaped dielectrics; A connection terminal having a connection portion bonded to the printed substrate, and a front edge of the curved tubular casing surrounding the connection terminal of the center contact at the other end of the curved tubular casing is bonded to the printing. One side of the substrate. For example, the mounting structure of the coaxial connector of claim 1, wherein the connection portion of the printed substrate includes a through hole, the axial direction of the curved tubular casing is bent to face one side of the printed substrate, The connection terminal is connected to the aforementioned through hole. For example, the installation structure of the coaxial connector of claim 1, wherein the connection portion of the printed substrate includes a pattern on the surface of the substrate, and the axial direction of the curved tubular casing is inclined downward to approach one side of the printed substrate. The aforementioned connection terminals of the contact are bonded to the aforementioned pattern. For example, the installation structure of the coaxial connector according to any one of claims 1 to 3, wherein the center contact piece is integrally molded with a group of the aforementioned disc-shaped dielectric systems; A set of semi-cylindrical split casings which are composed of the aforementioned disc-shaped dielectrics.