JPH0145714B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connector equipped with pressure contact type terminals and used for connecting a flat cable for signal transmission.
In particular, it relates to a connector whose contacts are arranged in a high density manner.

Flat cables for signal transmission, in which signal conductors and ground conductors are arranged regularly and alternately within a soft insulator, are used for electronic computers and other devices that handle signals. Transmission flat cables (hereinafter referred to as cables) generally have a structure with a large number of conductor cores and a small pitch between the conductors. Therefore, the connector used to connect the cable is also required to be small and the method for connecting the terminal and the cable conductor to be simple and reliable. In addition, when each ground conductor of the above cable is grounded, usually each conductor is first connected to a common conductor inside the cable side connector, and then the common conductor is further connected to one or more contacts, and then In many cases, a ground circuit is formed by fitting a cable-side connector into an apparatus-side connector. In this case, conventional methods for connecting the above-mentioned common conductor to the contacts have been based on soldering or a contact spring piece structure, but with either method, the structure of each member is complicated, and assembly is time-consuming and expensive. It is undesirable to see rising water. In particular, if the shape of the contact is complicated, the shape tends to become large, and therefore it is difficult to reduce the pitch of the arrangement of the contacts. It has become unsuitable for high-density arrays.

The present invention has been made in view of the above-mentioned problems, and its purpose is to quickly and reliably connect each conductor of a cable to a contact by using a pressure-contact type terminal. The grounding conductor can be connected to the grounding circuit of the device through any signal conductor contact.In particular, the shape of the contact can be made simple to increase the density of the arrangement, and the pitch of the contacts should match the pitch of the signal conductor of the cable. It is an object of the present invention to provide a high-density press-contact type connector in which the contacts can be arranged in only one row and the overall shape of the connector is reduced.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. 1 and 2 are partially sectional perspective views of the cable-side connector of the connector according to the present invention, and FIG. 1 shows only the connector;
Figure 2 shows the state in which the cables are connected. This is the main component of the cable side connector side 10 in FIG. The insulator 11 has a recess 13 formed in its upper surface (upper part in the drawing) 12 in the longitudinal direction of the insulator, and of the parallel side surfaces 14 and 15, the lower part of the side surface 14 is cut at right angles in the direction of the side surface 15, and a stepped surface 16 is formed. After forming the side surface 14,1
It leads to an inner surface 17 parallel to 5. A plurality of contact holding holes 19-1 and 19-2 are provided perpendicularly to the bottom surface 18 from the bottom surface 18 of the recess 13 to the step surface 16, and the arrangement pitch of each of these holding holes is determined by the signal conductor of the cable to be connected. matches the array pitch of Next, FIG. 3 shows an example of the structure of a general cable used in the present invention, in which a cable 35 is made up of a plurality of signal conductors 37 and a ground conductor 38 covered with a soft insulator 36 and parallel to each other. but,
The arrangement is such that a ground conductor 38 is placed between signal conductors 37.
are arranged for two. However, only one ground conductor 38 is provided on both outer sides. As shown in FIGS. 1 and 2, the signal contact 40-n of the connector includes a press-fitting part 41 consisting of a press-fitting taper 42 and a press-fitting groove 43 at one end. A neck portion 44 having a small diameter and biased to one side with respect to the plane of the pressure contact portion protrudes, and the other end of the signal contact 40 that is continuous with the neck portion forms a signal pin terminal portion 45 having a rectangular cross section. The signal contact 40-1 has a shape in which the center line of the signal pin terminal part 45 and the center line of the pressure contact part 41 coincide, but in the signal contact 40-2, the center line of the signal pin terminal part 45 coincides with the center line of the pressure contact part 41. The shape is biased to one side with respect to the center line. The signal contacts 40-n are connected to the contact holding holes 19-1 and 19-.
2, each of the contact holding holes has a cross-sectional dimension measured in a direction perpendicular to the side surface 14 of the insulator 11, and a pin terminal portion whose cross-sectional dimension is measured in a direction perpendicular to the surface of the pressure contact portion 41 of the signal contact 40-n. 45, so if each signal contact 40-n is inserted into the contact holding hole 19-n with its pin terminal portion 45 first, the lower edge of the pressure contact portion 41 of the signal contact will be The pin terminal portion 45 contacts the bottom surface 18 of the insulator recess 13 and stops, and the pin terminal portion 45 contacts the contact holding hole 19-
Each signal contact is press-fitted into the inside of the contact hole, and each signal contact is held sufficiently without being easily pulled out. Note that the signal contact 4 attached to the insulator 11
The quantity of 0-n is equal to the number of signal conductors of the cable to be connected, and the signal contact 40-1 is inserted into the contact holding hole 19-1, and the signal contact 40-
2 is also attached to 19-2. However, since the pin terminal of the ground contact described later is also inserted into the contact holding hole 19-2, the cross-sectional area of the hole is larger than the cross-sectional area of the contact holding hole 19-1. Since the relationship is the same, the signal contact 40-2 is also press-fitted and will not come out. In addition, since adjacent signal contacts are arranged so that the inclination directions of their neck portions 44 are opposite to each other, the pressure contact portions 41 are arranged in a staggered manner, and the end faces of the adjacent pressure contact portions 41 are sufficiently separated from each other, resulting in an accidental short circuit. There is no fear. Next, the ground plate 50 includes a flat plate portion 51 having an area that covers most of the bottom surface 18 of the recess 13, and a ground plate 50 that protrudes from one end surface parallel to the longitudinal direction of the flat plate portion in a direction perpendicular to the surface of the flat plate portion 51. A plurality of ground conductor press-contact parts 52 extend, and after protruding slightly from the other end face parallel to the above-mentioned end face in the same direction as the plane of the flat plate part, are bent at right angles to the flat plate part 51 and in the opposite direction to the above-mentioned press-contact part 52. It consists of one or more extending ground pin terminal portions 53. The number of ground conductor press-contact parts 52 is the same as the number of ground conductors 38 of the cable to be connected. However, two ground conductors in parallel are counted as one. Further, its shape is almost the same as the pressure contact portion 41 of the signal contact 40-n, but the width of the press-fit groove is a size suitable for press-fitting the ground conductor of the cable. In addition, since the bending positions of the ground conductor press-contact parts 52 from the flat plate part 51 are not on the same line but are alternately arranged in a staggered manner, the ground conductor press-contact parts 52 are also arranged in a staggered manner, and the end surfaces of their sides are spaced apart from each other. It is designed so that there is no hindrance to the operation when press-fitting the conductor. Further, the arrangement pitch of the pressure contact portions 52 naturally matches the arrangement pitch of the ground conductor 38 of the cable 35, and therefore also the arrangement pitch of the signal conductor 37. As mentioned above, there are two parallel ground conductors 3 between the signal conductors 37.
Consider 8 as one piece. Next, the ground pin terminal section 53
has the same shape and dimensions as the signal pin terminal portion 45 of the signal contactor 40, and is provided at a position that coincides with the contact holding hole 19-2, so when the ground plate 50 is attached to the insulator 11, From the top surface 12 side, the ground pin terminal portion 53 is inserted into the corresponding contact holding hole 19-.
2, the pin terminal part 53 is press-fitted into the holding hole, and is closely parallel to the signal pin terminal part 45, so it is sufficiently held in the hole and does not easily come out. Thus, the ground plate 50 is also stably held on the bottom surface of the recess 13. In addition, as shown in FIG. 1 and as described above, the holding hole 19-
At location 2, since the pin terminal portion 45 of the signal contact 40-2 is biased to one side, it does not prevent the signal contact 40-2 from being inserted into the same hole together with the ground pin terminal portion 53. With the signal contacts 40-n and the ground plate 50 mounted on the insulator 11 in this manner, the arrangement pitches of the conductor pressure contact portions 41 of the signal contacts 40 and the ground conductor pressure contact portions 52 of the ground plate 50 are equal, and The center lines of each pressure contact portion in the direction perpendicular to the insulator side surface 14 are shifted by about half a pitch between the pressure contact portion 41 and the ground conductor pressure contact portion 52. Furthermore, a signal pin terminal portion 45 and a ground pin terminal portion 53 are arranged to protrude from the stepped surface 16 following the side surface 14. Next, a cable 35 is connected to this connector 10 to form a connector assembly, which is shown in FIG. After removing an appropriate length of the insulator 36 at the terminal end of the cable 35 to expose each conductor, a signal conductor 37 and a ground conductor 38 are connected.
and are bent in opposite directions and approximately perpendicular to the plane of the cable. In this figure, the molded conductor is placed above the pressure contact portion of the connector, with the signal conductor 37 facing forward (facing the left in the figure) and the grounding conductor 38 facing the rear (facing the right in the figure). As mentioned above, the pitch and relative position of each insulation displacement part match that of the conductor of the cable, so each conductor, that is, the signal conductor 37 is connected to the insulation displacement part 41, and the ground conductor 38 is connected to the ground conductor using an appropriate jig. By simultaneously pressing the conductors 52, each conductor is guided to the opening of the press-fitting groove 43 by the press-fitting taper 42 of each press-contacting part, and is press-fitted into the press-fitting groove as it is. In this case, each press-fitting groove 43 has a width slightly narrower than that of the conductor to be press-fitted, so the conductor is slightly deformed, and the press-fitting groove is elastically deformed so as to slightly widen its width. The terminal is held in close contact with the end surface of the press-fitting groove of the terminal, similar to a conventional pressure contact terminal. Regarding the ground conductor press-contact parts 52, all the ground conductors 38 are connected to the ground conductor 38 except those located on both outer sides of the cable 35.
Two ground conductors will be press-fitted, but since two ground conductors are press-fitted one above the other, one conductor will be press-fitted.
You can think of it in exactly the same way as with books. After the conductor is press-fitted, the protective cover 2 is
0 and cable holder 25. The protective cover 20 is for protecting the conductor from slipping out from the pressure welding part when an external force is applied to the flat cable 35, and has a substantially rectangular parallelepiped shape.
A groove 21 through which the cable 35 passes is formed along the center line in the longitudinal direction, and a recessed chamber 22 into which each contact pressure welding part can fit is provided on the lower surface facing the insulator 11 at a position that coincides with each contact pressure welding part. In addition, a slightly recessed step 23 is formed on the lower surface of the insulator in contact with the upper surface 12 in order to avoid the terminal portions of the conductors that are pressed together. The cable retainer 25 is a rectangular parallelepiped with a shallow U-shaped cross section, and the bottom surface 26 of one leg of the U-shape is in close contact with the top surface 24 of the protective cover 20, but the other leg is shorter than the other leg. A gap approximately equal to the thickness of the cable 35 is created between the bottom surface 27 and the top surface 24 of the cover 20. Therefore, the cable 35 led out from the groove 21 of the protective cover 20 is immediately bent at right angles and is held between the upper surface 24 of the protective cover and the bottom surface 27 of the cable pusher 25. In order to fix the protective cover 20 and the cable holder 25, as shown in FIG. Engagement window 2 near the bottom edge
9 is opened, and on the other hand, locking protrusions 30 are provided protrudingly on both longitudinal end surfaces of the insulator 11, and after fitting the protective cover 20 to the insulator 11, the cable retainer 25 is further attached to its fixing leg 28. If the protective cover 20 and the insulator 11 are slid and pressed along each end surface, the engagement window 29 will get over the locking protrusion 30 and the two will be in an engaged state, and the cable retainer 25 and the protective cover 2 will be in an engaged state.
0 and the insulator 11 are integrated with the cable 35 held therebetween to form a cable side connector.

Next, FIG. 4 shows a structure of a printed circuit board fixing connector to be fitted with the cable side connector as a perspective view including a partial cross section and an exploded view. Note that this printed circuit board fixing connector (hereinafter referred to as fixed connector) is shown as a double type into which two cable side connectors can be fitted. Fixed connector 6
0 consists of a housing 61 and several types of contacts, each contact being female and having each contact hole 64-n penetrated through the housing 61.
is inserted into. The housing 61 is a substantially rectangular block, and mounting seats having screw holes are provided at both longitudinal ends thereof, and the housing 61 is fixed to a printed circuit board or the like by screwing. A contact hole 64- has a substantially rectangular cross section from the front surface 62 (left side in the figure) to the rear surface 63 (right side in the figure) of the housing 61.
n are provided in two rows, and the contact holes 64-
The arrangement pitch of the n connectors in the longitudinal direction matches the pitch of the pin terminals of the cable-side connector 10, that is, the pitch of the signal conductors of the cable used.
The contact hole 64-n has a signal contact hole 6.
4-1 and a grounding contact hole 64-2.
Since two female contacts are installed in parallel inside the grounding contact hole 64-2, the width dimension in the longitudinal direction of the housing is equal to that of the signal contact hole 64-2.
It is larger than that of No. 1, and its position coincides with the position where the signal pin terminal and the ground pin terminal are arranged in parallel in the cable side connector. It goes without saying that the presence of this grounding contact hole does not affect the overall arrangement pitch of the contact holes.

Next, the contacts of this fixed connector are the signal female contact 70-1 for the upper stage and the ground female contact 70-1.
0-2, and lower signal female contact 70-3
and ground female contact 70-4.
The female terminal portion 71 of each contact is configured in a fork shape with a pair of opposing elastic legs 72, 72', and the tip of each leg includes a receiving tapered portion that slopes inwardly, and a receiving tapered portion that is inclined inwardly. Subsequently, contact protrusions 73, 73 protruding toward each other are formed. Since the dimension between the tips of the contact protrusions 73, 73' is made slightly smaller than the thickness dimension of the pin terminal to be fitted, sufficient elastic contact can be obtained with the pin terminal fitted. A portion continuous to the female terminal portion 71 is a flat base portion 74, and the both end surfaces of the base portion are provided with holes that engage with the inner wall surface of the contact hole 64-n when the contact 70-n is inserted into the contact hole 64-n. Locking protrusions 75, 75' are formed to lock the contacts so that they do not easily slip out. The connection terminal portion continuous with the base portion 74 differs depending on each contact. In the upper stage signal female contact 70-1, the end of the base 74 is bent to one side at a right angle, and from that part it is integral with the base 74 and extends in a direction parallel to the plane of the base and perpendicular to its extension direction. A connecting terminal 76 having a rectangular cross section extends,
Further, the connecting terminal is bent at right angles in a direction parallel to the extending direction of the base portion 74 to form a horizontal portion 77, and then a soldering end 78 formed into a thin plate shape is formed. Note that the lower surface of the horizontal portion 77 including this soldered end 78 is
When the main fixing connector 60 is attached to the printed circuit board, it is aligned with the surface of the printed circuit board. Next, the ground female contact 70- for the upper stage
2 is formed into a shape in which two pairs of female terminal portions 71 and base portions 74 are arranged close to each other in parallel and are integrally continuous with a U-shaped piece below the base portions 74. The connection terminal 76' is similar to the signal contact 70-1 in that it is integrated with one base 74, but
The length of the base portion 74 is slightly shortened to prevent it from coming close to other adjacent contacts 70-n.
Therefore, the length of the horizontal portion 77 including the soldering end 78 is longer than that of the signal female contact 70-1, and as a result, the soldering end 78 of each contact is aligned on the same line. Next, the signal female contact 70-3 for the lower stage is the same as the above-mentioned upper stage contact up to the base 74, but is integrally connected from one end of the base 74 to a rising part 79 having a width approximately equal to that of the base. The rising portion 79 extends perpendicularly to the center line in the extending direction of the female terminal portion 71, and its lower end (on the printed circuit board side) is bent at right angles to one side and connected to the connecting terminal 80. The connecting terminal 80 has a cross section similar to that of the aforementioned connecting terminal 76, and its tip also forms a soldering end 78 similar to that described above. Furthermore, the ground female contact 70- for the lower stage
Similar to the upper stage grounding female contact 70-2, the contact 4 has two pairs of female terminal portions 71 and base portions 74 arranged close to each other in parallel, but each pair has one end at the end of the base portion 74. It connects to each U-shaped piece of a rising portion 79' which is bent into a U-shape.

The rising part 79' is its lower end (on the printed circuit board side)
The signal female contact 70-3 is the same as the signal female contact 70-3 except that it is bent at right angles to one side and connected to the connection terminal 80.

Among the above contacts, the upper signal female contact 70-1 and the lower signal female contact 70
-3 are respectively inserted into the signal contact holes 64-1, and the upper ground female contacts 70-
The grounding female contacts 70-4 for the second and lower stages are respectively inserted into the grounding contact holes 64-2. The housing 61 has three peripheral walls 67 on its upper surface 65 and lower surface 66, excluding the front surface 62 side.
A fitting cavity 6 is provided at a location surrounded by a peripheral wall 67.
8 is formed. The circumferential walls 67 at both longitudinal ends of the housing 61 are provided with eaves 69 extending in opposite directions at their upper portions, and a guide groove 81 is formed between the lower surface of the eaves 69 and the upper surface 65 of the housing 61 . When this connector 60 is attached to a printed circuit board (not shown), a predetermined circuit pattern and mounting screw holes are provided on the printed circuit board in advance as shown in FIG. The connector is fixed by connecting the screw holes 83 of 82 and the mounting screw holes of the printed circuit board with screws 84 and nuts. Next, the soldering end 78 of each contact may be soldered to each circuit pattern, but in that case, it goes without saying that the soldering end connected to the ground female contact will be connected to the grounding circuit. Next, when fitting the cable-side connector 10 to the fixed connector 60, first, one cable-side connector 10 is opposed to the fixed connector 60, and the inner surface 17 and side surface 15 of the connector 10 shown in FIG. When the connector 10 is advanced while fitting the protrusion 31 into the fitting cavity 68 of the fixed connector 60 shown in FIG.
3 are the corresponding signal contact hole 64-1 and ground contact hole 6 of the fixed connector 60, respectively.
4-2, and each pin terminal on the connector 10 side fits into the female terminal portion 71 of each contact on the fixed connector 60 side. This state is shown in a cross-sectional view in FIG. 5, and a ground pin terminal in which two pin terminals are similarly arranged in parallel is fitted into the ground contact 70-4 or 70-2 in which the female terminal portions 71 are arranged in parallel. Since the ground contacts 70-4 or 70-2 are structurally integrated as described above and their terminals are connected to the ground circuit of the printed circuit board, by fitting the cable side connector 10 into the fixed connector 60, the cable Each of the 35 ground conductors will be connected to a ground circuit. Furthermore, in FIG. 6, the guides 32 are rectangular blocks provided at both longitudinal ends of the protrusion 31 of the connector 10,
When the connector 10 and the fixed connector 60 are mated, the connector 10 fits into the guide groove 81 formed by the eaves 69 of the peripheral wall 67 of the connector 60, and the connector 10 does not move excessively in the direction perpendicular to the side surface 14 while the connector 10 is mated. It works to prevent accidents that could deform the tilted pin terminal. When fitting one connector 10 and then fitting the next connector 10, the procedure is exactly the same except that the vertical position of the connector 10 is reversed.

In the above explanation, the fixed connector 60 has a structure in which two cable-side connectors 10 are fitted at the same time, but it goes without saying that it is also possible to have a structure in which only one cable-side connector 10 is fitted. Nor.

As described above, according to the present invention, in a connector for connecting a flat cable for signal transmission to a device, it is possible to easily and reliably connect each conductor of the cable to a contact by using a pressure contact type terminal. As a method of connecting the ground conductor to the ground circuit, the contacts of the ground conductor are placed in parallel with the contacts of any signal conductor in the cable side connector in close proximity, and the terminals are pin-shaped, while on the fixed connector side, each terminal is As a female type, the contact corresponding to the ground conductor contact of the above connector is integrally configured with two terminals arranged in parallel,
By connecting this terminal to the ground circuit of the device, when the cable side connector is fitted to the fixed connector, the ground conductor of the cable is grounded through the contact on the fixed connector side. This eliminates the need to directly connect the grounding conductor and the grounding signal conductor, and since the terminal is pin-shaped, the entire structure of the cable-side connector including the contact is simplified, while the female terminal on the fixed connector side can also be easily connected. Because it has a fork-shaped structure, it is possible to reduce the pitch between the contacts, and the arrangement pitch of the contacts of the connector can be made equal to the pitch of the signal conductor of the cable, so that the contacts are arranged in a single row. The whole becomes smaller,
For example, an excellent effect can be obtained in that it becomes possible to connect two cable-side connectors to one fixed connector.

[Brief explanation of drawings]

1 and 2 are partially sectional perspective views of the flat cable side connector according to the present invention;
The figure is an external view of a signal transmission flat cable used in the present invention, Figure 4 is a partial cross-sectional perspective view of a connector for fixing a printed circuit board according to the present invention, and Figure 5 is a pin terminal section of each contact. FIG. 6 is a partially omitted sectional view showing a state in which the connector and female terminal portion are fitted together, and FIG. 6 is a perspective view showing a state in which the connectors according to the present invention are fitted together. 10...Flat cable side connector, 35...
... Signal transmission flat cable, 37 ... Signal conductor, 38 ... Ground conductor, 40-1, 40-2 ...
Signal contact, 41... Pressure contact part, 45... Signal pin terminal part, 50... Ground plate, 52... Ground conductor pressure contact part, 53... Ground pin terminal part, 60...
...Connector for fixing printed circuit board, 70-1, 70
-3...Signal female contact, 70-2, 70-4
...Grounding female contact, 71...Female terminal section.

Claims (1)

[Claims] 1. A signal contact that connects a flat cable in which signal conductors and ground conductors are regularly arranged, and which has a press-contact part for press-fitting the signal conductor at one end and a pin terminal at the other end. and a grounding plate having a pressure welding part for pressure-welding the grounding conductor arranged at the same pitch as the grounding conductor on one side and one or more pin terminals integrally molded on the other side, The signal contacts are arranged at the same pitch as the signal conductor, and the pin terminal of the grounding plate is provided with a flat cable side connector disposed close to the pin terminal of any signal contact, and one female terminal. a signal female contact and a ground female contact having two female terminals closely arranged integrally, the signal female contact being positioned opposite to the signal contact of the flat cable side connector; The cable connector is also characterized in that it is comprised of signal contact pin terminals arranged close to each other on the flat cable connector side and fixed connectors arranged at positions opposite to the pin terminals of the ground contact. Density pressure welding type connector.