JPH0447684A - Connector for flat cable - Google Patents

Abstract

PURPOSE:To improve the productivity of a connector for a flat cable by bending each of horizontal sides of a tee blank in a U-shape and in an angle of 180 degrees at a notched portion formed in the upper side of each of positions respectively symmetrical to two places of the horizontal sides of the tee blank so as to form a groove wherein only a signal conductor in the flat cable is nipped in its longitudinal direction, and then compulsorily curving the signal conductor press-fitted into the groove. CONSTITUTION:A groove 12f wherein only a signal conductor in a flat cable can be nipped in its longitudinal direction is formed in each of contact portions 12a by bending each of horizontal sides of a tee blank having its vertical side composed of a stationary portion 12c and an externally connecting terminal 12d in an identical direction, in a U-shape and in an angle of 180 degrees, at a notched portion 12e formed in the upper side of each of positions respectively symmetrical to two places of the horizontal sides. Also the head of each of the horizontal sides is bent further inward while a cut and righted piece 12g which is notched from the upper side of each of the horizontal sides to be projected outside is formed near a central portion corresponding to each of the two end portions of the horizontal sides. The signal conductor in the flat cable, nipped in the groove 12f, may thus be curved compulsorily by the head-bent portion so as to attempt improvement in the contact property of the conductor with a connector. Even signal conductors of wire diameters different from one another can consequently be curved under an identical condition so as to secure stable contact property of each of the signal conductors.

Description

[Detailed Description of the Invention] [Summary] Regarding flat cable connectors, the purpose is to expand the range of application of flat cables and improve productivity by adapting to the narrowing of the pitch between signal lines of flat cables. For flat cables, the contact part, the fixing part, and the external connection terminal are formed integrally with a spring metal plate, and are composed of a plurality of press-contact terminals, and an insulator that aligns and fixes the press-contact terminals. In the connector, the horizontal side of a T-shaped blank whose vertical sides are the fixing part and the external connection terminal are bent 180 degrees into a U-shape on the same side at two symmetrical upper sides of the horizontal side with notches provided at two symmetrical positions. It has a contact I part, which has a groove formed by curving the end further inward, and a cut and raised piece protruding outward by a cut from the upper side near the center of the horizontal side corresponding to both ends. The pressure contact terminal is fixed by the through hole of an insulator having a through hole through which the pressure contact terminal can be fixed by the fixing portion so that the grooves formed in the contact portion are parallel to each other.

[Industrial application field]

The present invention relates to the configuration of a connector for flat cables, and in particular, by configuring the connector using pressure contact terminals that can accommodate flat cables with a small pitch between each signal line, the range of application of flat cables is expanded and productivity is improved. This invention relates to an improved Fran I/cable connector.

In recent years, flat cables have been widely used in various electronic devices in order to improve the space factor and reduce the size of the devices.However, the pitch between the signal lines of these flat cables tends to become smaller and smaller, so there are connectors that can accommodate such flat cables. It is strongly required.

[Conventional technology]

Figure 3 is a diagram showing an example of the configuration of a conventional flat cable connector. (1) is an overall configuration diagram, and (2) is a diagram of the configuration between a terminal and a flat cable when (a) is viewed from the direction of arrow A. It is a figure showing a relationship.

In FIG. 3(1), the flat cable connector 1 is composed of a plurality of pressure contact terminals 2 and an insulator 3 that holds the pressure contact terminals 2 in alignment.

In particular, the pressure contact terminal 2 in this case has a bifurcated contact portion 2a with a sharpened tip, a narrow external connection terminal 2b connected to a device, etc. on the other end, and an intermediate portion thereof.
It is a plate-shaped body consisting of a fixing part 2c which is narrower in width than the contact part 2a and wider than the external connection terminal 2b, and the fixing part 2c is further formed with a protrusion 2d protruding from one side.

In addition, the insulator 3 has rectangular through holes 3a arranged on two sides in a staggered manner at equal intervals through which the fixing part 2c of the pressure contact terminal 2 can pass through with some margin. When the press-contact terminal 2 is fixed, the width direction of the contact portion 2a of the press-contact terminal 2 protrudes from the insulator 3 along the longitudinal direction of the insulator 3.

Therefore, when the above-described pressure contact terminal 2 is inserted into each through hole 3a of the insulator 3 from the external connection terminal 2b side and press-fitted as it is, the protrusion 2d portion presses the inner wall of the square hole 3a of the insulator 3. The pressure contact terminal 2 is fixed to an insulator 3 to constitute a desired flat cable connector 1.

Particularly in this case, as shown in (2), the contact portions 2a of each pressure contact terminal 2 are arranged so that the width direction of the contact portions 2a are lined up in the longitudinal direction of the insulator 3 at equal intervals p.

On the other hand, 4 in the figure is a flat cable in which a plurality of signal lines 4a are buried in parallel in an insulation coating 4b at equal pitches P.

Therefore, after connecting the external connection terminals 2b of the flat cable connector 1 to the device side, for example by soldering, etc., the pitch between the pressure contact terminals 2 is equal to the pitch t and the pitch P (in this case, p
= p), connect each signal line 4a to the contact part 2a of the pressure contact terminal 2 as shown by arrow B using a jig or the like (not shown), with each signal line 4a corresponding to the pressure contact terminal 2. When pressed, the sharpened tip of the contact portion 2a breaks through the corresponding insulation coating 4b of the flat cable 4 and pinches only the signal wire 4a, resulting in the contact between the signal wire 4a and the pressure contact terminal 2. Part 2
a, and thus the flat cable 4 and the device can be easily connected.

However, since each of the bifurcated contact portions 2a is oriented in the direction in which the signal lines 4a of the flat cable 4 are aligned,
In other words, since the width direction of each contact portion 2a faces the signal line 4a, there is a drawback that it cannot be applied to a flat cable having a pitch P smaller than at least the width W of each contact portion 2a.

For example, in a conventional flat cable, the pitch P between each signal line is at least 1.27 mm, and the flat cable connector 1 having the above configuration can adequately handle this, but recently, the pitch P between each signal line is 1.27 mm. A 0.635 mm flat cable has been put into practical use, and it is difficult to apply it to such a flat cable.

[Problem to be solved by the invention]

A flat cable connector having a conventional configuration has a problem in that it cannot be used for a flat cable in which the pitch P between each signal line is small.

[Means to solve the problem]

The above problem consists of a plurality of press-contact terminals in which the contact part, the fixing part, and the external connection terminal are integrally formed with a spring metal plate, and an insulator that aligns and fixes the press-contact terminals. A connector for a flat cable, in which the horizontal side of a T-shaped blank whose vertical sides are the fixing part and the external connection terminal are cut in two symmetrical positions on the upper side of the horizontal side to form a U-shape 180 mm on the same side. A contact portion is provided with a groove formed by bending the contact portion twice and further curving the end portion inward, and a cut-and-raised piece protruding outward by a cut from the upper side near the center of the horizontal side corresponding to both ends. A flange I having a press-contact terminal fixed in the through-hole of an insulator having a through-hole through which the press-contact terminal can be fixed to the fixing part so that the grooves formed in the contact part are parallel to each other.・
Solved by cable connectors.

[For production]

If a flat cable connector is constructed by arranging insulation displacement terminals with contact portions that run in the direction along the signal lines of the flat cable so that the contact portions are parallel, it is possible to connect even flat cables with narrow pitches between signal lines. .

In the present invention, the contact part of the pressure contact terminal is bent 180 degrees into a U-shape on the same side by cutting the horizontal side of the T-shaped blank at two symmetrical upper sides of the horizontal side, so that only the signal line of the flat cable can be bent. A groove is formed to sandwich the material in its length direction,
Further, by forcibly bending the signal line press-fitted into the groove, contact between the signal line and the contact portion, and eventually the pressure contact terminal, is ensured.

Therefore, it is possible to realize a flat cable connector that can reliably connect even a flat cable with a narrow pitch between signal lines.

〔Example〕

FIG. 1 is a diagram illustrating an example of a flat cable connector according to the present invention, in which (8) shows a state before pressure welding of the flat cable, and (B) shows a state after pressure welding.

Further, FIG. 2 is a diagram illustrating an example of forming a pressure contact terminal.

In FIG. 1 (8), the flat cable connector 11 is composed of a plurality of pressure contact terminals 12 and an insulator 13 that aligns and holds and fixes the pressure contact terminals 12.

The pressure contact terminal 12 made of an internally springy metal plate is integrally formed with a contact portion 12a for pressure contacting a flat cable, a fixing portion 12c having a protrusion 12b protruding from one side, and an external connection terminal 12d.

In particular, in this case, the contact portion 12a has the fixed portion 1
2c and the external connection terminal 12d as vertical sides are bent 180 degrees into a U-shape in the same direction at two notches 12e provided at symmetrical positions on the upper side of the horizontal side, thereby creating a flat cable signal. A groove 12f is formed in which only the wire can be inserted in the length direction, and the tip of the horizontal side is further bent inward, and a groove is cut from the upper side near the center part corresponding to both ends of the horizontal side to extend outward. Protruding cut and raised piece 1
2g, the flannel I sandwiched between the grooves 12f
- The signal line of the cable is forcibly bent by the bent portion at the tip to improve contact.

In this case, the tip bent portion has a spring property, so that it bends in accordance with the thickness of the signal line.

Therefore, even signal wires with different wire diameters can be bent under the same conditions, and stable contact can be ensured.

The figure inside the circle shows the contact portion 12a in a plan view, and when the covered signal wire along the longitudinal direction is pressed onto the contact portion 12a from above, the covering material is cut off at the upper side of the horizontal side. In order to avoid this, only the signal wire is press-fitted while being sandwiched between the grooves, and furthermore, it is forcibly bent as shown by the broken line C in the figure by the bending and cutting and raising pieces 12f at the ends of the horizontal sides. Become.

In this case, the forced curvature is caused by the two edges of the tip of the horizontal side, but at the same time, the cut and raised piece 1 of the horizontal side
Since the two edges (2) on the 2f side are also contacted with the same force, contact is ensured at at least four locations, and stable contact performance can be obtained.

Further, the insulator 13 is formed with through holes 13a similar to FIG. Twelve contact portions 12a are arranged at a pitch equal to the signal line pitch of the flat cable and oriented in the direction along the signal line.

Therefore, by inserting the pressure contact terminal 12 into each through hole 13a of the insulator 13 from the external connection terminal 12d side and press-fitting it as it is, the pressure contact terminal 12 can be fixed to the insulator 13 as in FIG. flat cable connector 1
1 can be configured.

In this case, as shown in (A-1), each pressure contact terminal 12
The contact portions 12a are arranged perpendicularly to the longitudinal direction of the insulator 13 at equal intervals p.

On the other hand, 4 in the figure is the flannel 1-cable described in FIG. 3, in which a plurality of signal lines 4a are buried in parallel in an insulating sheath 4b at equal pitches P.

Therefore, after connecting the external connection terminals 12d of the flat cable connector 11 to the device side, for example by soldering, etc., they are formed at a pitch P equal to the pitch P between the pressure contact terminals 12 (in this case, p=P). flat cable 4
The contact portion 12 of the pressure contact terminal 12 is made to correspond to each signal line 4a and the pressure contact terminal 12 using a jig or the like (not shown).
a, the contact portion 1 is pressed as shown in (B).
The upper side of the horizontal side of the flat cable 2a cuts off the insulation coating 4b between each signal line of the flat cable 4, and only the signal line 4a is press-fitted into the groove 12f of each contact part 12a. Each signal fiber 4a and the contact portion 12a of the press-contact terminal 12 can be easily connected between the flat cable 4 and the device.

(B-1) shows the connection part in a plan view, and the connected contact part 12a and signal line 4a are connected to the insulation coating 4.
It represents the state emerging from b.

In particular, in this case, since each contact portion 12a faces in the same direction as the signal wire of the flat cable, it is possible to apply up to a flat cable where the gap between the signal wires is close to the plate thickness of the pressure contact terminal 12. In general, it is possible to obtain a flat cable connector that can connect even flat cables whose pitch P between signal lines is narrower than that of conventional ones.

It has been experimentally confirmed that the connector having such a configuration can be applied to, for example, a flat cable with a pitch P between each signal line of 0.635 mm.

In the second part showing an example of forming the pressure contact terminal 12 that implements the present invention, (a) shows the blank shape, and (b) shows the completed shape.

Fixing part 1 provided with protrusion 12b protruding from one side in (a)
On the horizontal side of the T-shaped blank whose vertical sides are the external connection terminal 12d and the external connection terminal 12d, the notches 12e explained in FIG. is provided with the above-mentioned cut and raised piece 12g.

Therefore, after bending the horizontal side 180 degrees in the same direction as shown by the arrow a at the cut portion 12e, the vicinity of the tip is further bent inward as shown by the arrow A near the broken line, and at the same time, the cut and raised piece 12g By cutting and raising it in the direction of arrow C, it is possible to obtain a desired pressure contact terminal 12 having a contact portion 12a in which a groove 12f is formed, as shown in FIG.

The chamfers 12h formed near both ends of the horizontal sides are for facilitating the bending of the press-fitted flat cable signal line.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a flat cable connector that is compatible with flat cables having a small pitch between signal lines, thereby expanding the range of application of flat cables and improving productivity.

Although the present invention will be described with reference to the case where the aperture plate and the aperture plate tilting tool are always attached to the connector, at least the aperture plate tilting tool that protrudes to the outside of the casing will be used when the flexible board is inserted or removed. You can get the same effect even if you remove everything else.

In the description of the present invention, the press-fitting terminal is fixed to the insulator by press-fitting it with a protrusion provided on the fixing part of the press-fitting terminal, but this fixation can be done by using a cut-and-raised fader provided on the fixing part or by using a cut-and-raised fader provided on the fixing part. The same effect can be obtained by using other means such as twisting.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating an example of a flat cable connector according to the present invention, FIG. 2 is a diagram illustrating an example of forming a pressure contact terminal, and FIG. 3 is a diagram illustrating an example of the configuration of a conventional flat cable connector. It is. In the figure, 4 is a flat cable, 4a is a signal line, 4b is an insulating coating, 11 is a flange 1 to cable connector, 12 is a pressure contact terminal, 12a is a contact portion, 12b is a protrusion,
12c is a fixed part, 12d is an external connection terminal, 12e
12f is a groove, 12g is a cut and raised piece, 12h is a chamfer, 13 is an insulator, and 13a is a through hole.

Claims (1)

[Claims] A flat cable connector consisting of a plurality of pressure contact terminals in which a contact part, a fixing part, and an external connection terminal are integrally formed with a spring metal plate, and an insulator that aligns and fixes each pressure contact terminal. Then, the horizontal side of the T-shaped blank whose vertical sides are the fixing part (12c) and the external connection terminal (12d) are made on the same side with the notches (12e) provided at two symmetrical positions on the upper side of the horizontal side. A groove (12
f) and a cut and raised piece (12g) protruding outward from the upper side near the center of the horizontal side corresponding to both ends.
An insulation displacement terminal (1) having a contact portion (12a) with
2) is an insulator provided with a through hole (13a) through which the pressure contact terminal (12) can be fixed with the fixing part (12c) so that the grooves (12f) formed in the contact part (12a) are parallel to each other; (13) A connector for a flat cable, characterized in that it is fixed in the through hole (13a).