JPH0462199B2 - - Google Patents

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention is directed to, for example, forming a multi-stage shelf on a frame to divide it into a plurality of units, and plugging a plurality of printed boards into each unit. The present invention relates to a connection structure between a printed board and an external coaxial cord in a rack device or the like in which a printed board unit is formed by in-mounting.

(b) Background of the Technology In general, racking equipment for communication devices, etc., for example, racking equipment related to transporting telephone lines, switching equipment, etc., is equipped with multi-tiered shelves on a frame whose outer diameter is formed to a certain specified size. Some devices are constructed by having a plurality of printed board units formed by dividing the board into a plurality of units and inserting a plurality of printed boards into each unit. In each of these printed board units, the coaxial line in the high frequency circuit of the printed board and the coaxial cord of the external line are connected via a coaxial connector on the back side of the rack. Therefore, the connection structure of such a printed board unit is that the plug-in connection of the printed board allows for easy insertion and removal, and it is also possible to connect each coaxial connector independently, regardless of whether the printed board is inserted or not. It is desirable to have a structure that allows for easy coupling and detachment.

(c) Prior art and problems FIGS. 1 to 3 are schematic diagrams for explaining a first conventional example. FIG. 1 is a front view of a rack device 10 according to a first conventional example, FIG. 2 is a schematic side view seen from the direction of arrow A in FIG. 1, and FIG.
FIG. 2 is a perspective view of the interrupted part (mounted part) 17 as seen from the direction (however, the surface plate 17b is removed). In these figures, numeral 11 indicates a frame, and 12
13 is formed by inserting a plurality of printed boards 14 (only one place is shown as a representative) into the unit 12. Each printed board unit is shown below. Each printed board unit 13 is configured to have a predetermined function. The printed board unit 13 includes each printed board 1.
A plurality of coaxial connectors (not shown) fixed to the rear end of 4 are connected to coaxial connectors (only one shown as a representative) 15 fixed to the back board 10a of the rack 10 in correspondence with these coaxial connectors. By plugging in, it is connected to an external coaxial cord (external line) 16 as described later. An interrupted portion 17 is formed on the bridge portion of the bridge construction device 10, and a support plate 17a (FIG. 2) is disposed within this interrupted portion 17.
A plurality of interrupting coaxial connectors 18 are fixed to. An external coaxial cord 16 is connected to one end of the interruption coaxial connector 18, and one end of an interruption coaxial cord 19 is similarly connected to the other end. The other end of the interrupting coaxial cord 19 is connected to a coaxial connector 15 fixed to the back board 10a. In this way, the printed board unit 13 is connected to the external coaxial cord 16 via the interrupting coaxial cord 19. In addition, the code 17b
indicates the top plate of the interruption 17. However, this prior art example 10 has the following problems.

Although there is an advantage that the printed board 14 can be easily connected by plug-in, if the number of coaxial connectors 15 is increased, the number of interrupting coaxial connectors 18 must also be increased accordingly. Therefore, it is necessary to enlarge the interruption part 17, and the proportion of the area occupied by the interruption part 17 increases, making it unsuitable for high-density packaging.

Since the plurality of coaxial connectors on the printed board 14 are plug-in connected to the coaxial connector 15 fixedly provided on the back board 10a, only a specific connector 15 can be removed during maintenance or inspection. It's really inconvenient.

Since the two coaxial connectors 15 and 18 are used to connect to the external coaxial cord 16, transmission efficiency decreases.

4 to 6 are schematic diagrams for explaining the second conventional example. 4 is a front view of the racking device 20 according to the second conventional example, FIG. 5 is a schematic side view seen from the direction of arrow C in FIG. 4, and FIG. 6 is a detailed view of portion D in FIG. 5. . In these figures, the same parts or corresponding parts as in the above-mentioned Figs. 1 and 2 are designated by the same reference numerals. The feature of this second conventional example is that the relay portion 17 in the first conventional example is removed, and the unit 12 and the printed board unit 13 are formed over the entire frame 11. Therefore, as shown in FIG. 5, the external coaxial cord 16 is guided directly to the back side of the printed board unit 13 and connected to the printed board 14 (see FIG. 6) via the coaxial connector 25. The details of this connection are shown in FIG. In the same figure, a ∠-shaped metal fitting 21 is fixed to the rear end of the printed board 14, and a printed-board side connector 25a of a coaxial connector 25 is attached to this ∠-shaped metal fitting 21. And external coaxial cord 16
A cord side connector 25b is attached to the tip of the cord. The rack device 2 is connected to the printed board side connector 25a.
Pass through the back board 20a from the back side of 0,
By fitting and inserting the cord-side connector 25b and tightening the screws, these two connectors 25a and 25b, that is, the coaxial connector 25, are connected. In this way, by adopting a structure in which the external coaxial cord 16 is directly connected to the printed board 14, this second conventional example has the advantage that the mounting area can be expanded and the mounting density can be increased. However, there are further problems as follows.

When inserting the printed board 14, it is necessary to insert and fix the printed board 14 in advance and then connect the cord side connector 25b on the back side of the racking device 20. In this case, the cord side connector 25b is detached from the back side of the rack device 20 in advance, and then the printed board 14 is attached to the front side.
Since it is necessary to pull out the printed board 14, the operation of inserting and removing the printed board 14 is complicated, and the operation procedure is limited, which is inconvenient.

Since the plurality of external coaxial cords 16 are freely suspended in the air before being connected, they may get mixed up and get mixed up.
Therefore, there is a problem that connecting to a predetermined connection partner is troublesome and there is a risk of making a mistake.

(d) Purpose of the Invention In view of the above-mentioned problems of the prior art, the purpose of the present invention is to make it possible to independently insert and remove a printed board, as well as to connect and disconnect a coaxial connector. The object of the present invention is to provide a printed board unit connection structure in which a cord-side coaxial connector can be arbitrarily attached and detached from the rear side of the rack regardless of the connection.

(E) Structure of the Invention In order to achieve the above object, the present invention provides a coaxial connector connection structure for a printed board plug-in connected to a device, which connects the back side of the device and the printed board. Separate housings facing each other are fixedly installed at the rear end, and coaxial connectors that can be connected by plug-in are installed in these housings, and the coaxial connectors are connected to each other by fitting the housings together. Provided is a printed board unit connection structure configured to fit and connect, and further characterized in that only the coaxial connector on the rear side can be arbitrarily attached to and detached from the coaxial connector mounting portion of the housing from the rear side. be done.

(f) Embodiments of the invention Examples of the invention will be described in detail below with reference to the drawings.

7 to 13 are diagrams for explaining embodiments of the present invention. In these figures, the same or relative parts as in FIGS. 1 to 6 are designated by the same reference numerals.

FIG. 7 is a front view of a rack device 30 having a printed board unit connection structure of the present invention, and FIG. 8 is a schematic side view as viewed from the direction of arrow E in FIG. 7. As shown in the figure, this embodiment is similar to the above-mentioned second embodiment (fourth,
5 and 6), the external coaxial cord 16 connects to the printed board unit (only one location is shown as a representative) 1.
3, and is configured to be connected to the printed board 14 via the coaxial connector 31, but as will be described later, the connection structure of the coaxial connector 31 portion has been devised and improved. be. That is, regardless of whether the printed board 14 is inserted (mounted) or not, the connector (coaxial plug 31a to be described later) on the external coaxial cord 16 side of the coaxial connector 31 is connected to the rear back board 30 of the rack device 30.
The main feature is that it is removably formed and attached to the a side.

Figure 9 shows the printed board unit 13 in Figures 7 and 8.
FIG. 10 is a perspective view of FIG. 9 seen from the back side (in the direction of arrow F). In both of these figures, reference numeral 32 indicates the backboard 30a.
33 is a printed board 14
(Only one is shown as a representative) A housing fixed to the rear end is shown in each case. These two housings are disposed opposite to each other and are formed to fit into each other. The coaxial connector 31 is composed of a coaxial plug (backboard side coaxial connector) 31a and a coaxial socket (printed board side coaxial connector) 31b which are fitted together. A plurality of coaxial plugs 31a are arranged in series on the backboard side housing 32 and are detachably attached. The coaxial socket 31b is arranged and fixed on the printed board housing 33 facing the coaxial plug 31a. The coaxial plug 31a is then connected to the external coaxial cord 16, and the coaxial socket 3
1b is connected to an internal coaxial cord 34. The internal coaxial cord 34 is electrically connected to the printed circuit board 14 circuit. The coaxial plug 31a and the coaxial socket 31b are plugged in and connected by pushing the printed board 14 in the direction of arrow G shown in FIG. 9, and are removed by pulling out the printed board 14 in the direction of arrow H. .

FIG. 11 is a diagram showing each component of the coaxial plug 31a in FIGS. 9 and 10, in which A shows the fastening cap 35 with an external thread 35a, B shows the holding spring 36, and C shows the plug into which the spring 36 is inserted. The main body 31c is shown. Note that 31d indicates a notch for soldering the center conductor. The cap 35 has large and small insertion holes 35c, 35 that are continuous concentrically through a stepped portion 35b.
d is formed. The spring 36 is formed into a cylindrical shape, and has an axial slit 36 in a part of the circumference.
a and is formed to have radial elasticity, and a plurality of cut grooves 36b are provided on the rear end side, and several rear ends 36c on the circumference are formed to expand into a conical shape. ing. Utilizing its elasticity, the spring 36 is easily inserted into the constricted portion 31e of the plug body 31c, as shown in Figure C.
Then, as shown in Fig. C, by inserting the plug body 31c into which the spring 36 is inserted into the cap 35 from the direction of the arrow J, both of them are connected to the first
As shown in Figure 2B, they are assembled together.

FIG. 12 is a cross-sectional view A of the backboard side housing 32 in FIGS. 9 and 10, and a view showing the assembled coaxial plug 31a B. Housing 32
The insertion hole 32a accommodates the front end portion 31f of the plug body 31c through a gap, and the plug body 31
Insertion hole 32b into which the central portion 31g of c is fitted and inserted.
and an insertion hole 32c into which the metal fitting 37 is inserted and fixed are formed concentrically, and are continuous with each other via a step. The metal fitting 37 has an internal thread 37a, and is inserted into the insertion hole 3 by means such as press-fitting or inserting.
It is fitted and fixed inside 2c. Coaxial plug 31a
As described above, the plug body 31c is formed as an assembly in which the spring 36 and the cap 35 are inserted. The step portion 35b (see FIG. 11A) of the cap 35 is connected to the rear end 36c of the spring 36.
(see FIG. 11B), and the rear end surface 35e is the flange portion 31h of the plug body 31c.
It is locked by. As a result, the cap 35 is fixed to the plug body 31c in the axial direction and rotatably inserted in the circumferential direction. Note that an external coaxial cord 16 is attached to the rear end 31i of the plug body 31c.
(Figures 8 and 10) are connected. Now, in FIG. 12, when inserting and fixing the coaxial plug 31a into the housing 32, the plug body 31a is inserted from the direction of arrow K.
1c into the housing 32 and screw the outer thread 35a of the base 35 and the inner thread 37a of the metal fitting 37 together to fasten the housing 32.
A coaxial plug 31a is fixed to. In this case, as described above, the cap 35 is rotatably attached to the plug body 31c, so it can be screwed into the fitting 37 without rotating the plug body 31c. This means that the plug body 31c
External coaxial cord 16 connected to rear end 31i
This means that the coaxial plug 31a can be attached to and detached from the housing 32 without twisting the coaxial plug 31a.

FIG. 13 shows a coaxial plug 31a attached to the housing 32.
It is a figure which shows the state which inserted and fixed. In the figure, a coaxial socket 31b (no. 9
) are fitted and connected. Moreover, this coaxial socket 31b is placed in the insertion hole 32a of the housing 32 in advance (that is, the coaxial socket 31b is placed in the printed board 14 in advance).
), then this coaxial socket 31
Of course, it is also possible to fix the coaxial plug 31a to the housing 32 by fitting and inserting the plug body 31c into the housing 32. This means that the coaxial plug 31a can be attached and detached in a printed board mounted state or in an unmounted state.

The present invention is not limited to the above-described embodiments; the backboard may be a board or a printed board, and the backboard may be located on the rack side or on the unit side. Furthermore, the housing may be attached directly to the frame or to the rack instead of the backboard.

In addition, the positional relationship between the coaxial plug and the simultaneous socket may be reversed.

(G) Effects of the Invention As explained above in detail, the printed board unit connection structure of the present invention connects an external coaxial cord directly to a printed board via a coaxial connector, and can be used regardless of whether or not the printed board is mounted. By attaching the coaxial cord side and the coaxial connector to the back board of the rack equipment in a removable manner from the rear side of the equipment, it is possible to achieve high-density mounting of the equipment and prevent deterioration of transmission characteristics. If necessary, external coaxial cords can be arbitrarily connected either before or after mounting the printed circuit board, and it is also possible to easily remove only a specific external coaxial cord or replace and connect a specific coaxial cord. One of the great effects is that it can simplify assembly, testing, maintenance, etc.

[Brief explanation of the drawing]

FIG. 1 is a front view of a rack device 10 according to the first conventional example, FIG. 2 is a schematic side view as seen from the direction of arrow A in FIG. 1, and FIG. 3 is an interrupted portion seen from the direction of arrow B in FIG. A perspective view of the (mounted part) 17 (however, the surface plate 17
b), FIG. 4 is a front view of the rack device 20 according to the second conventional example, and FIG. 5 is the arrow C in FIG. 4.
Schematic side view seen from the direction, Figure 6 is D in Figure 5
7 is a detailed view of a portion, and FIG. 8 is a front view of a rack device 30 having a printed board unit connection structure of the present invention
The figure is a schematic side view seen from the direction of arrow E in Figure 7.
9 is a perspective view of the printed board unit 13 shown in FIGS. 7 and 8 as seen from the front side, FIG. 10 is a perspective view of the printed board unit 13 shown in FIG. 12 is a diagram showing each component of the coaxial plug 31a shown in the figure, in which A shows an externally threaded fastening fitting 35, B shows a holding spring 36, and C shows a plug body 31c into which the spring 36 is inserted. The figure shows the cross section A of the backboard side housing (frame side housing) 32 in Figures 9 and 10 and the assembled coaxial plug 31a B, and Figure 13 shows the state in which the coaxial plug 31a is inserted and fixed in the housing 32. FIG. 11...Frame, 12...Unit, 13...Printed board unit, 14...Printed board, 16...
...external coaxial cord, 30... racking device having the printed board unit structure of the present invention, 30a... backboard, 31... coaxial connector, 31a... coaxial plug of coaxial connector 31 (backboard side coaxial connector), 31b... Coaxial socket of coaxial connector 31 (printed board side coaxial connector), 32...
...Backboard side housing (frame side housing),
33... Printed board side housing, 34... Internal coaxial cord, 35... Fastening cap, 36... Holding spring, 37... Internal threaded fitting.

Claims (1)

[Claims] 1. A coaxial connector connection structure for a printed circuit board that is plug-in connected to a device, in which separate housings are fixed to the rear surface of the device and the rear end of the printed circuit board, and each housing is fixed to the rear end of the printed circuit board. are configured such that coaxial connectors that can be connected by plug-in are attached to each of the coaxial connectors, and the coaxial connectors are connected to each other by fitting the housings together, and furthermore, only the coaxial connector on the rear side is connected to the housing. A printed circuit board unit connection structure characterized by being able to be attached to and detached from the rear side of the coaxial connector attachment part at will.