JPH08330030A - Connector - Google Patents

Abstract

PURPOSE: To provide a connector which can correspond to a pitch of a signal line to be narrowed further to removal of a noise. CONSTITUTION: A plurality of through holes 5 are arranged with a narrow pitch in an insulating housing 2 formed of heat resistant insulating resin. A protruded part 7 having a sloped surface is provided in an internal peripheral surface of this through hole 5. Further, an individual electrode 6 of functioning as a signal line is formed by a means of plating, etching, or printing, etc.,. in the internal peripheral surface of the through hole 5. A slit 10 is formed in the insulating housing 2 to be adjacent to the through hole 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector, and more particularly to a connector mounted on a circuit board for connecting to a cable of an external device.

[0002]

2. Description of the Related Art Conventionally, a connector has been composed of an insulating housing and a metal terminal attached to the insulating housing. Further, in recent years, EMI (electromagnetic interference) countermeasures have become an important issue in electric and electronic devices, so that a filter element for EMI countermeasures is mounted on a circuit board and around a connector for cable connection. There are cases. This is because the cable may serve as an antenna and electromagnetic noise may be radiated into and out of the device.

[0003]

By the way, since the conventional connector uses the metal terminal, the pitch dimension of the signal line is comparatively large, and there is a problem that it cannot be used as a connector of a cable with a narrow pitch. there were.
This is because there is a limit to thinning the metal terminal in order to secure the mechanical strength. Moreover, when the mating connector is fitted, the metal terminals may be deformed and the distance between the adjacent metal terminals may be narrowed. Therefore, it is necessary to set the pitch of the metal terminals wider accordingly. This is because the. Furthermore, since the conventional connector is composed of an insulating housing and metal terminals, the number of parts is large,
A complicated assembly process was required. Moreover, the metal terminal is a relatively expensive part, which causes an increase in the manufacturing cost of the connector. In addition, it has been extremely difficult to secure a space for installing a filter element on a circuit board as a countermeasure for EMI, while there is a strong demand for miniaturization of equipment.

Therefore, an object of the present invention is to provide an inexpensive connector which can deal with a narrower pitch of signal lines and also deal with noise elimination.

[0005]

To achieve the above object, a connector according to the present invention comprises (a) an insulating housing, and (b) through holes provided in the insulating housing at a predetermined pitch. (C) provided on the inner peripheral surface of the through hole,
It is characterized in that it is provided with a convex portion having an inclined surface, and (d) an individual electrode provided on the inner peripheral surface of the through hole and electrically connected to a signal line on the circuit board. And
It is preferable to provide the insulating housing with a slit close to the through hole. Further, it is preferable to use a dielectric material as the material of the insulating housing and to provide a ground electrode on the surface of this insulating housing.

[0006]

The connector constructed as described above does not use metal terminals as signal lines but uses individual electrodes provided in the insulating housing, so that the signal lines can be easily thinned. That is, the individual electrodes are formed by means such as plating, etching, or printing, which can be easily thinned. This connector functions as a female connector, and as the terminals of the mating male connector are inserted into the through holes provided in the insulative housing, the pressure contact force between the convex portion having the inclined surface and the terminal becomes stronger. Then, finally, the terminals are press-fitted, and the terminals of the male connector and the individual electrodes are electrically connected. At this time, the individual electrode is not likely to be deformed unlike the metal terminal.

Further, the slit close to the through hole imparts springiness to the convex portion having the inclined surface, so that a preferable contact pressure is exerted between the terminal of the mating male connector and the convex portion having the inclined surface. generate. Further, capacitance is generated between the individual electrode and the ground electrode provided in the insulating housing made of a dielectric material. That is, the individual electrode and the ground electrode form a capacitor element. This capacitor element is EMI
It acts as a filter element as a countermeasure and blocks the intrusion of electromagnetic noise.

[0008]

Embodiments of the connector according to the present invention will be described below with reference to the accompanying drawings. The same reference numerals are given to the same parts and the same parts in each embodiment. [First Embodiment, FIGS. 1 to 4] As shown in FIGS. 1 to 3, the insulating housing 2 has a substantially rectangular parallelepiped shape.
Mounting portions 3 for securely fixing the connector 1 to the circuit board extend to both ends of the housing 2. The mounting portion 3 is provided with a through hole 4. A screw or bolt is inserted into the through hole 4 to attach the connector 1 to a circuit board or the like. The insulating housing 2 is formed by a method such as injection molding using a heat resistant insulating resin such as nylon, polyphenylene sulfide or liquid crystal polymer.

In the width direction of the insulating housing 2, a plurality of through holes 5 extending from the front side surface to the rear side surface of the insulating housing 2 are arranged at a narrow pitch. The through hole 5 has a rectangular cross section. The pitch of the through holes 5 is equal to the pitch of the terminals of the mating male connector. The inner peripheral bottom surface of the through hole 5 is provided with a convex portion 7 having an inclined surface, and the size of the through hole 5 is gradually reduced in the portion where the convex portion 7 having the inclined surface is provided. ing. However, it goes without saying that the convex portion 7 having the inclined surface does not necessarily have to be provided on the inner peripheral bottom surface, and may be provided on the inner peripheral ceiling surface or side surface. Further, individual electrodes 6 functioning as signal lines are formed on the inner peripheral surface of the through holes 5. The individual electrodes 6 are easily formed by a method such as plating or etching of Ag or Ag-Pd, or printing.

As shown in FIG. 1, one end of the individual electrode 6 wraps around to the bottom through the side surface on the front side of the insulating housing 2. On the bottom surface of the insulative housing 2, a plurality of strip-shaped projections 9 extending from the front side surface to the back side surface are arranged in parallel, and the individual electrodes 6 are arranged on the surfaces of the projections 9, respectively. There is. Since the groove is formed between the individual electrodes 6 adjacent to each other by the convex portion 9, when the connector 1 is mounted on a circuit board or the like, the mounting solder hardly bridges between the adjacent individual electrodes 6.

A slit 10 is formed near the through hole 5 in the width direction of the insulating housing 2. The slit 10 gives springiness to the convex portion 7 having the inclined surface. The connector 1 having the above structure functions as a female connector, and as shown in FIG. 3, the terminal 1 of the mating male connector is used.
As 5 is inserted into the through hole 5 from the direction of the arrow a, the terminal 15 presses the inclined surface of the convex portion 7 to try to spread the through hole 5, whereby the housing 2 is elastically deformed and the gap of the slit 10 is formed. Is narrowed, and the convex portion 7 having the inclined surface and the terminal 15 are brought into pressure contact with each other with a preferable contact pressure to electrically connect them securely. Finally, the connector 1 and the mating male connector are fitted together with the terminal 15 pressed into the through hole 5.

This connector 1 does not use metal terminals as signal lines but uses the individual electrodes 6 formed on the inner peripheral surface of the through hole 5 of the insulating housing 2 by means such as plating, etching or printing. The signal lines can be easily thinned. Further, the individual electrode 6 is not likely to be deformed like a metal terminal even when it is fitted to the mating connector. As a result, the connector 1 that can cope with the narrower pitch of the signal lines and is inexpensive can be obtained. FIG. 4 is an electrical equivalent circuit diagram of the connector 1.

[Second Embodiment, FIGS. 5 to 8] In the second embodiment, a filter element built-in connector will be described. Figure 5
As shown in FIGS. 7 to 7, the insulating housing 22 has a substantially rectangular parallelepiped shape, and mounting portions 23 for fixing the connector 21 to the circuit board extend at both ends of the housing 22. The mounting portion 23 is provided with a through hole 24. The insulating housing 22 is formed by a method such as injection molding using a material in which a dielectric powder such as barium titanate is mixed with a heat resistant insulating resin such as nylon, polyphenylene sulfide or liquid crystal polymer.

In the width direction of the insulating housing 22, a plurality of through holes 25 extending from the front side surface to the rear side surface of the insulating housing 22 are arranged at a narrow pitch. The pitch of the through holes 25 is equal to the pitch of the terminals of the mating male connector. A convex portion 27 having an inclined surface is provided on the inner peripheral surface of the through hole 25. Furthermore, through hole 2
On the inner peripheral surface of 5, individual electrodes 2 functioning as signal lines
6 is formed. As shown in FIG. 5, the individual electrode 26
One end portion of the one side wraps around to the bottom surface through the front side surface of the insulating housing 22. On the bottom surface of the insulative housing 22, there are juxtaposed projections 29 extending from the front side surface to the back side surface for preventing solder bridges, and the individual electrodes 26 are arranged on the surfaces of the projections 29, respectively. It is set up.

A ground electrode 31 is formed on the upper surface of the insulating housing 22 by means such as plating or printing.
The ground electrode 31 and the individual electrode 26 form a capacitor element. This capacitor element acts as a filter element for EMI countermeasures. The ground electrode 31 extends to the inner peripheral surface of the through hole 24 and reaches the bottom surface of the insulative housing 22. A screw or bolt is inserted into the through hole 24 to attach the connector 21 to the circuit board or the like, and the ground pattern and the ground electrode 31 on the circuit board.
To be electrically connected.

Insulative housing 2 close to through hole 25
Slits 30 are formed in the width direction of 2. The slit 30 imparts springiness to the convex portion 27 having an inclined surface. FIG. 8 is an electrical equivalent circuit diagram of the connector 21. The connector 21 having the above structure has the same effects as the connector 1 of the first embodiment, and since it already has a filter element, that is, a capacitor element,
A space for mounting the filter element on the circuit board is not required, an increase in the space of the circuit board can be eliminated, and the intrusion of electromagnetic noise is prevented by the capacitor element.

[Other Embodiments] The connector according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the gist thereof. The shape and the like of the slits provided in the housing are arbitrary. For example, as shown in FIGS. 9 to 12, the slits 4 provided for each through hole 5 are provided.
It may be 1, 42, 43, 50, 51. Slit 41 is I-shaped, slit 42 is L-shaped, slit 4
3 is a U-shape, and the slit 50 is the slit 1 of the first embodiment.
The same shape as 0, the slit 51 connects the through holes 5. Also, the slit is not always necessary,
As shown in FIG. 13, depending on the specifications, a connector having no slit in the housing may be used. The slit does not necessarily have to be arranged on the side where the convex portion having the inclined surface is provided with respect to the through hole, but on the side opposite to the side where the convex portion having the inclined surface is provided. It may be arranged.

Further, the through hole provided in the housing is not limited to a hole having a rectangular cross section, and may be a hole having a circular cross section. Further, the shape of the ground electrode provided on the surface of the housing is also arbitrary, and for example, FIGS.
Like the connector 44 shown in FIG. 5, a ground electrode 45 corresponding to each of the individual electrodes 26 may be provided on the bottom surface of the housing 22, or like the connector 48 shown in FIGS. A wide area ground electrode 49 may be provided on the top and bottom surfaces of the.

As means for mounting the connector on a circuit board or the like, in addition to screwing and bolting, an electrode pattern is formed on the mounting side surface of the housing mounting portion, and this electrode pattern and the pattern on the circuit board are used. May be fixed by soldering. Further, the housing mounting portion may be provided with a fixing claw, and the fixing claw may be press-fitted and fixed in a mounting hole provided in the circuit board.

In addition, as the material of the insulating housing, a powder of a varistor material is used instead of the dielectric powder, an insulating housing is manufactured, and a varistor element is composed of individual electrodes and ground electrodes. May be

[0021]

As is apparent from the above description, according to the present invention, a metal terminal is not used as a signal line, and a convex portion having an inclined surface is provided on the inner peripheral surface of the through hole of the insulating housing. Moreover, since the individual electrode provided on the inner peripheral surface of the through hole is used, the signal line can be easily thinned. Further, even when fitted to the mating connector, the individual electrode is unlikely to be deformed like a metal terminal. As a result, it is possible to obtain a low-priced connector that can cope with a narrower pitch of signal lines.

Further, since the slit close to the through hole imparts springiness to the convex portion having the inclined surface, a preferable contact pressure is generated between the terminal of the mating connector and the convex portion having the inclined surface. The electrical connection between the mating connector terminal and the individual electrode can be made more reliable. Moreover, since the capacitor element which is the filter element for the EMI countermeasure is constituted by the individual electrode and the ground electrode provided in the insulating housing made of the dielectric, it is not necessary to set the filter element space on the circuit board. It is possible to eliminate the increase in the space of the circuit board.

[Brief description of drawings]

FIG. 1 is a front perspective view showing a first embodiment of a connector according to the present invention.

FIG. 2 is a perspective view of the connector shown in FIG. 1 viewed from the back side.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an electrical equivalent circuit diagram of the connector shown in FIG.

FIG. 5 is a perspective view showing a second embodiment of the connector according to the present invention as seen from the front side.

6 is a perspective view of the connector shown in FIG. 5 viewed from the back side.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6;

8 is an electrical equivalent circuit diagram of the connector shown in FIG.

FIG. 9 is a front view showing a modified example of the slit.

FIG. 10 is a front view showing another modification of the slit.

FIG. 11 is a front view showing still another modification of the slit.

FIG. 12 is a front view showing still another modification of the slit.

FIG. 13 is a sectional view of a connector showing another embodiment.

FIG. 14 is a perspective view of a connector according to another embodiment as viewed from the front side.

15 is a perspective view of the connector shown in FIG. 14 viewed from the bottom side.

FIG. 16 is a perspective view of a connector according to still another embodiment as viewed from the front side.

FIG. 17 is a perspective view of the connector shown in FIG. 16 viewed from the bottom side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Connector 2 ... Housing 5 ... Through hole 6 ... Individual electrode 7 ... Inclined convex part 10 ... Slit 21 ... Connector 22 ... Housing 25 ... Through hole 26 ... Individual electrode 27 ... Inclined convex part 30 ... Slit 31 ... Ground electrode 41, 42, 43, 50, 51 ... Slit 44 ... Connector 45 ... Ground electrode 48 ... Connector 49 ... Ground electrode

Claims (3)

[Claims] 1. An insulative housing, through holes provided at a predetermined pitch in the insulative housing, a convex portion having an inclined surface provided on an inner peripheral surface of the through hole, and a through hole of the through hole. A connector, comprising: an individual electrode provided on an inner peripheral surface and electrically connected to a signal line on a circuit board. 2. The connector according to claim 1, wherein a slit adjacent to the through hole is provided in the insulating housing. 3. The insulative housing is made of a dielectric material, and a ground electrode for forming a capacitance with the individual electrode is provided on the surface of the insulative housing. Connector described.