JPH0723931Y2 - Common mode choke coil with multi-pair signal line connector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a multi-pair signal line connector for preventing noise that conducts a communication line and intrudes into a device from the outside or is conducted and radiated from the device to the communication line. With common mode choke coil.

[Conventional technology]

9 (a) is a diagram for explaining the prior art, FIG. 9 (b) is an equivalent circuit diagram thereof, 1 is an N-pair signal line connector, 2 is an annular closed magnetic circuit core, 3 is a modular Plugs, and L ₁ to L _N are common mode choke coils using an annular closed magnetic circuit (note that L is simply used when collectively referred to). In order to prevent common mode noise that conducts each of the N pairs of signal lines from one side to the other side in the same direction, the N pair signal line connector 1 is provided with N closed magnetic circuit cores 2 for each pair of wires. Used common mode choke coil L ₁ , L ₂ ,
Although it is possible to attach L ₃ , ... L _N externally, in such a case, if there are N pairs of signal lines, N common mode choke coils L _{1 to} L _N are required, and a large mounting space is required. It will cost. Therefore, when the method of using the common mode choke coil L in which the size of the closed magnetic circuit core 2 is reduced in order to reduce the mounting space, a large inductance cannot be obtained, and the noise attenuation characteristic in the low frequency band deteriorates. Therefore, it is usual to increase the number of turns. However, increasing the number of turns inevitably increases the density of the windings, which not only increases the distributed capacitance of the windings themselves but also increases the number of windings. When the closed magnetic circuit core 2 is used, the distance between the input side and the output side of the winding becomes close to the inside thereof, so that the capacitance between the input and output windings also increases. This deteriorates the noise attenuation characteristic in the high frequency band.

Next, FIG. 10 is a diagram for explaining another conventional technique.
In the figure, N pairs of signal lines are overlapped and wound on one annular closed magnetic circuit core 2. As shown in FIG. 10, in the common mode choke coil L, 4 is a winding in which N pairs of signal lines are overlapped and wound, and each of the pair of signal lines has N windings in the annular closed magnetic circuit core 2. When paired and wound, the winding density becomes high at both ends of the input / output winding, so not only the distance becomes shorter and the winding cannot be performed, but also the distance becomes longer in the central part, which creates unnecessary space. This will conflict with the trend toward compactness. Furthermore, FIG. 11 shows
It is a figure explaining the prior art of the noise prevention method by shielding different from these, FIG. 11 (a) is the perspective view,
FIG. 11 (b) is its electrical equivalent circuit.

In FIG. 11, 5 is a shield case for covering the multi-pair signal line connector 1, 6 is ground, 7 is a shield case for covering the multi-pair signal line, and G1 and G2 are terminals for connecting the shield case 5 and the shield case 7. Therefore, by shielding the multi-pair signal line connector 1 with the shield case 5 and shielding the multi-pair signal line cable with the shield case 7, the common mode noise in the high frequency band that is transmitted from the outside through the cable or the like is eliminated. , To the ground 6 by connecting to the ground 6 via the connection terminals G1 and G2. However, in such a method, there is no noise blocking effect unless the ground 6 is provided.

12 and 13 are a perspective view and a cross-sectional view showing the connection relationship between the N-pair signal line connector 1 and the modular plug 3 in FIG. 9 in more detail.

In these figures, the N-pair signal line connector 1 is provided with 2N spring contact grooves 1a, which are made of conductive material.
Further, 2N elastic springs 1b that are bent are mounted, and the common mode choke coil L is connected to the springs 1b.

The modular plug 3 has 2N plug contact grooves 3a, N
It is formed so as to correspond to the spring contact groove 1a of the paired signal line connector 1, each conductor 3b of the multi-pair line is inserted into this plug contact groove 3a, and the plug contact 3c contacting this is fixed. 3d is a lock piece after the modular plug 3 is inserted into the N-pair signal line connector 1.

With this configuration, the modular plug 3 is
If inserted into the signal line connector 1, each plug contact
3c and the spring 1b are elastically contacted with each other to establish conduction. First
Also in the case of FIG. 10, the configuration of this part is the same.

[Problems to be solved by the device]

As described above, in the conventional common mode choke coil L of the multi-pair signal line shown in FIGS. 9 to 11, the mounting space is large and the distributed capacitance is increased to deteriorate the noise attenuation characteristic in the high frequency band. However, there is a problem in that a shield case is required and the configuration becomes complicated.

The present invention aims to provide a compact common mode choke coil with a multi-pair signal line while improving the noise attenuation characteristics over a wide band, except for the drawbacks of the conventional choke coil and shield as described above. And

[Means for Solving the Problems]

A common mode choke coil with a multi-pair signal line connector according to the present invention is provided with a multi-pair signal line connector main body provided with a connection terminal insertion groove, a pedestal for coil mounting, a protruding pin insertion groove, and a lid fixing portion. Attach the connection assembly terminal with the connecting terminal in the groove, and the coil with the prescribed multiple pairs of windings, the bobbin terminal, and the core insertion groove are formed. Insert the core from both sides, place the bobbin terminal of this self-supporting pin type bobbin on the pedestal while contacting the connection terminal of the connection assembly terminal, and attach the lid with the protruding pin, connector body fixing part and core holding spring to the self-supporting pin type. Cover the bobbin and press the connecting assembly terminal with the protruding pin, then fix the core with the core pressing spring, and fit the lid fixing part and the connector body fixing part together One in which the.

[Action]

In this invention, after inserting the connection assembly terminal into the multi-pair signal line connector body, insert the U-shaped core into the self-standing pin type bobbin from both sides and place it on the pedestal of the multi-pair signal line connector body. It is extremely easy to assemble by covering with a lid and fixing at the end.

〔Example〕

FIG. 1 is a diagram showing the principle of an embodiment of a common mode choke coil used in the present invention, and FIG. 1 (b) is an electrical equivalent circuit diagram of FIG. 1 (a). Is a rectangular closed magnetic circuit core, and 21 and 22 are windings in which a pair of signal lines are opposed to the major axis portion of the closed magnetic circuit core 20 and are evenly wound in a uniform single layer winding. , 22 are input terminals 11a, 1 respectively
It is wound so that magnetic fluxes in the same direction are generated in the closed magnetic circuit core 20 with respect to the common mode noise current flowing in from 2a or the output terminals 11b and 12b, that is, both magnetic fluxes are added.

FIG. 2 (a) shows the input terminals 11a, 12a shown in FIG. 1 (a).
2 shows a case where a pair of signal lines from the output terminals 11b and 12b are formed by three pairs of signal lines. FIG. 2 (b) is an electrical equivalent circuit of FIG. 2 (a). It is a figure. The input terminals 11a, 12a and the output terminals 11b, 12b are the first pair of signal lines, the input terminals 13a, 14a and the output terminals 13b, 14b are the second pair of signal lines, the input terminals 15a, 16a and the output terminal 15b, Reference numeral 16b denotes a third pair of signal lines. The first pair of signal lines are opposed to the major axis portion of the closed magnetic circuit core 20 and are uniformly wound in a uniform single-layer winding. Similarly, a second pair of signal lines is similarly wound on each of the windings, and a third pair of signal lines is also wound in the same manner to form windings 21 and 22. As described above, the closed magnetic circuit core 20 receives the common mode noise current flowing from each input terminal or output terminal.
Needless to say, they are wound so that magnetic fluxes in the same direction are generated inside each other.

FIG. 3 (a) is also a diagram showing the principle of another embodiment of the common mode choke coil L used in the present invention.
FIG. 3 (b) is an electrical equivalent circuit diagram of FIG. 3 (a), where 23a and 23b are windings each of which is divided into one major axis portion of the closed magnetic circuit core 20 and concentrated and wound. 24a, 24b are windings concentrated and wound one by one on the other major axis portion of the closed magnetic circuit core 20, and similarly to the above, with respect to the common mode noise current flowing from the input terminal and the output terminal. The windings are concentrated windings so that magnetic fluxes in the same direction are generated in the closed magnetic circuit core 20. Since the inter-winding stray capacitance is halved by forming the divided windings as described above, the noise attenuation characteristic in the high frequency band can be secured.

FIG. 4 (a) is a diagram showing the principle of yet another embodiment of the common mode choke coil L used in the present invention, and FIG. 4 (b) is an electrical equivalent of FIG. 4 (a). In the circuit diagram, 25a and 26a are one windings of the two-pair signal line, 25b and 26b are the other windings of the two-pair signal line, and one long axis of the closed magnetic circuit core 20. The windings 25a and 26a are individually divided and wound in a concentrated manner, and the windings 25b and 26b are also separately divided and intensively wound in the other major axis portion of the closed magnetic circuit core 20. Yes, input terminal 11,12a, 13a, 14a
And the output terminals 11b, 12b, 13b, and 14b are wound so that magnetic fluxes in the same direction are generated in the closed magnetic circuit core 20 with respect to the common mode noise currents, respectively. The same applies to a pair of signal lines.

FIG. 5 is an exploded perspective view showing an embodiment of the present invention based on the above principle, in which 30 is a multi-pair signal line connector body and 40
Is a connection assembly terminal, 50 and 60 are free-standing pin type bobbins, 20
Reference symbols a and 20b are U-shaped cores obtained by dividing a rectangular core into two, and the closed magnetic circuit core 20 shown in FIGS.
70 is a lid.

Further, details of each part and assembly will be described. The spring 42 of the connection assembly terminal 40 is inserted and arranged in the connection terminal insertion groove 31 (corresponding to the spring contact groove 1a in FIG. 12) of the multi-pair signal line connector main body 30, and the winding method described in the above principle is used to make a common connection. Second type of mode choke coil L
Self-supporting pin type bobbin 50, 60 in which the windings 21, 21 of FIG.
After forming the closed magnetic circuit by inserting the U-shaped cores 20a, 20b into the core insertion grooves 51, 61 from above and below respectively, dispose the bobbin terminals 52, 62 and the connection terminals 41 at the predetermined positions of the pedestal 32. In order to prevent the protruding pins 71, 72 of the lid 70 from coming out of the connection assembly terminal 40 by making contact with each other, insert them into the protruding pin insertion grooves 33, 34 (not shown), and the lid-integrated inverted C-shaped spring 73. , 74 are located on the upper surface of the core 20a to suppress and fix the core 20a, and the lid fixing portions 35, 36 of the multi-pair signal line connector main body 30.
The connector fixing portions 75 and 76 of the lid 70 are fitted to (not shown) to configure the whole. Then, when a modular plug (not shown) is inserted into the multi-pair signal line connector main body 30, the connection is made by the conductive spring 42 of the connection assembly terminal 40. Reference numerals 53 and 63 represent bobbin terminals.

FIG. 6 shows another embodiment of the connection terminal 41 of the connection assembly terminal 40 shown in FIG. 5. The connection terminal 41 has a spring property, and the bobbin terminal 52 is inserted into the connection terminal 41 and press-contacted for easy connection. There are advantages.

FIG. 7 shows another embodiment of the connection terminal 41 of the connection assembly terminal 40 shown in FIG. 5, 43 is a concave bobbin connection terminal, 44 is a convex adjacent contact preventing insulation, and a plate-shaped bobbin. The terminal 62 and the concave bobbin connecting terminal 43 are solder-connected by using the surface mounting technique, and the convex adjacent contact prevention insulation 44 prevents adjacent contact of the solder and has an advantage that the connection can be made surely and compactly.

FIG. 8 is an exploded perspective view showing another embodiment of the present invention, in which the connection assembly terminal 40 is inserted into the connection terminal insertion groove 31 (not shown) of the multi-pair signal line connector body 30 as described above. After that, attach the U-shaped cores 20a, 20b to the self-standing pin bobbins 50, 60.
Inserted in the core insertion grooves 51, 61 of each, and arranged and fixed at predetermined positions to connect the bobbin terminal 52 and the connection terminal 41, and the protruding pins 71, 72 of the lid 70 prevent the connection assembly terminal 40 from coming out. Insert it into the protruding pin insertion groove 33, 34 (not shown) to the lid fixing part 3 of the multi-pair signal line connector body 30.
The connector fixing part 76 of the lid 70 is fitted to the 7,38, the protruding parts 81,82 of the core fixing spring 80 are inserted into the grooves 77,78 respectively, and the U-shaped cores 20a, 20b are fixed to complete the whole. To do. In this way, the multi-pair signal line connector has a shape that spreads laterally in plan view, which is advantageous when the height is limited.

〔The invention's effect〕

As described in detail above, this invention provides a multi-pair signal line connector body with a connection terminal insertion groove, a pedestal for coil mounting, a protruding pin insertion groove and a lid fixing portion, and a connection terminal in the connection terminal insertion groove. Attach the equipped connection assembly terminal, and each of the coil with a predetermined number of pairs of windings and the bobbin terminal are provided with the core insertion groove. Insert the bobbin terminal of this self-supporting pin bobbin on the pedestal while touching the connection terminal of the connection assembly terminal, and cover the self-supporting pin bobbin with the lid that has the protruding pin, connector body fixing part and core holding spring. After pressing the connection assembly terminal with the protruding pin, the core is fixed with the core pressing spring, and the lid fixing part and the connector main body fixing part are fitted and integrated. Insert the U-shaped core from the top and bottom (right and left) into the self-supporting pin type bobbin wound with the signal wire, place it on the pedestal of the multi-pair signal line connector body, then cover with the lid and fix. Since it is completed, not only is it possible to avoid making it large with a complicated structure as in the past,
By replacing the self-standing pin type bobbin, a common mode choke coil with different characteristics can be obtained, which has a great practical effect.

[Brief description of drawings]

1 (a) and (b) to FIGS. 4 (a) and 4 (b) are configuration diagrams showing the principle of each embodiment of the present invention and its electrical equivalent circuit diagram, and FIG. 6 is an exploded perspective view showing the structure of the embodiment, FIG. 6 is an exploded perspective view showing the structure of another embodiment of the present invention, and FIG. 7 is another example of the connection assembly terminal in the embodiment of FIG. FIG. 8 is a perspective view showing another example of the connection assembly terminal and the self-standing pin type bobbin in the embodiment of FIG. 5, and FIGS. 9 (a) and 9 (b) are conventional common mode choke coils. FIG. 10 is a perspective view and its electrical equivalent circuit diagram, FIG. 10 is an explanatory view of a conventional common mode choke coil, and FIGS. 11 (a) and 11 (b) are perspective views and circuit diagrams showing other conventional examples. 12 and 13 show the relationship between the N-pair signal line connector and the modular plug in the conventional example of FIG. 9 in more detail. And is a perspective view and a cross-sectional view. In the figure, 20 is a closed magnetic circuit core, 20a, 20b are U-shaped cores, 21,
22 is a winding wire, 30 is a multi-pair signal line connector body, 31 is a connection terminal insertion groove, 32 is a pedestal, 33 and 34 are protruding pin insertion grooves, and 35 and 36
Is a lid fixing part, 40 is a connection assembly terminal, 41 is a connection terminal,
50 is a self-standing pin bobbin, 51 is a core insertion groove, 52 and 53 are bobbin terminals, 60 is a self-supporting pin bobbin, 61 is a core insertion groove, and 62 and 6
3 is a bobbin terminal, 70 is a lid, 71, 72 are protruding pins, 73, 74
Is a lid-integrated inverted C-shaped spring, and 75 and 76 are connector fixing parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yuzaburo Inoue, 1-30-13 Narimasu, Itabashi-ku, Tokyo, Sanritsu Co., Ltd. (56)

Claims (1)

[Scope of utility model registration request] 1. A connection assembly terminal having a connection terminal insertion groove, a pedestal for coil mounting, a protruding pin insertion groove, and a lid fixing portion in a multi-pair signal line connector body, and a connection terminal provided in the connection terminal insertion groove. , Each of which has a predetermined number of pairs of windings, a bobbin terminal, and two self-standing pin-shaped bobbins each having a core insertion groove, and insert a U-shaped core into the core insertion groove from both sides. The bobbin terminal of the self-supporting pin bobbin is arranged on the pedestal while being in contact with the connection terminal of the connection assembly terminal, and the self-supporting pin bobbin is provided by a lid equipped with a protruding pin, a connector body fixing portion, and a core pressing spring. It is characterized in that after covering and pressing the connection assembly terminal with the protruding pin, the core is fixed by the core pressing spring, and the lid fixing portion and the connector body fixing portion are fitted and integrated. Many-to-signal line connector with common mode choke coil.