JPS6193565A - Connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a connector for electronic equipment, and in particular to a flexible printed wiring board based on a film base or a connector for electronic equipment.
This invention relates to a connector suitable for film-based flexible flat ribbon cables, etc.

(#: Future technology) Conventionally, connectors for connecting printed wiring boards have a contact structure suitable for relatively thick (approximately 3 nm) printed wiring boards that are made of Bakelite material, glass epoxy material, etc. as a base material. Also, the standard pitch between terminals is
The size is 2.54nwn (1/10 inch), and the contactor of each connection terminal has a size that can be individually processed.

However, recently, with the demand for improved processing precision of printed wiring boards and higher density of one circuit, the pitch between the terminals of integrated circuit elements has tended to shift to 1.27 mm (1/20 inch). Accordingly, the pitch between connecting terminals of a printed wiring board is now required to be i, 27 mm, or 1.25 nn+, which is close to it.

Further, a small machine using a microprocessor and an electronic circuit 1, for example, an electronically controlled still camera.

Film-based printed wiring boards, which are easy to downsize and highly flexible, have come to be used in 8mm cameras, videotape recorders, portable (pocket-type) cassette recorders, and small automotive electronic devices. , a smaller pitch between connecting terminals, for example, one meter or less, is now required.

However, in order to properly connect printed wiring boards with such a small pitch between connecting terminals, it is difficult to make a connector with a conventional structure smaller, so in reality, it is about 1.25 mm. The reality is that anything below this limit is not provided.

In addition, the conventional connector has a contact structure suitable for a thick base board, and therefore the plate g 0 , 2
If this contact structure is applied to a flexible base material with a diameter of less than mm, it will be difficult to attach and detach to obtain the required contact pressure, and if attachment and detachment are to be made easy, the contact pressure will be insufficient. There is a drawback that it does.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned circumstances, and it is possible to reduce the pitch between contacts as much as possible, and to integrate the structure of the contacts, It is an object of the present invention to provide a connector that facilitates the assembly of extremely small objects and that can be used without using special connecting tools such as jigs when connecting to a printed wiring board.

(Structure of the Invention) In the present invention, at least one intermediate portion of a plurality of parallel conductive wires is molded with an insulating synthetic resin material. Each conductive material is connected and fixed by a horizontal bar-shaped intermediate fixing body perpendicular to the conductive material, and near one tip of each conductive material, the conductive material juxtaposed surface of each contact piece between the tip and the intermediate fixing portion is deformed. In order to prevent this, a contact member is formed by connecting conductive materials adjacent to each other while maintaining parallelism with a suitable tip fixing member, and a recess into which an intermediate fixing member of the contact member is fitted; A plurality of grooves into which each conductive material is fitted are formed on both sides perpendicular to the longitudinal direction of the recess, and a plurality of grooves in which each contact piece portion of the contact member is spanned and which presses the contact piece portion against the other base body. An elastic means provided in the extending direction, and a groove that fits each contact piece in the vicinity of the tip of the contact piece where the tip of the contact piece stretched over the elastic means exceeds the elastic means. is provided on at least one of the base bodies, and the contact member and the connected terminal member are overlapped and connected as appropriate with each other sandwiched therebetween.
It consists of a base body and a second base body.

(Example) Fig. 1 shows an exploded example of a connector according to the present invention, and the connector (A) consists of a contact member (10), a first base body (20), and a second base body (20). With the base body (30).

It is configured.

The contact member (10) has a plurality of wire-like conductive materials (11) arranged in parallel, and one end and an intermediate portion of each conductive material (11).
The base electrical materials (11) are fixed in one body by molding an insulating synthetic resin material into a horizontal bar shape perpendicular to the base material (11).

The tip fixing body (12) maintains the pitch between each of the six electrical members (11) when handling the contact member (10) as a component before assembling the connector (A).

This is to prevent deformation of the contact piece (lla), which will be described later, and does not need to be particularly strong structurally, and is relatively fragile and slender.

The intermediate fixing body (13) maintains the pitch between each conductive material (11) with high precision, and the contact member (10) has a flat shape that can be deformed and rotated, making it easy to handle. Compared to the tip fixing body (12),
It is thick and strong, and each conductive material (11) is firmly fixed in the axial direction.

Each conductive material (
11) is a contact piece (11) when used as a connector.
a) This part is subjected to surface treatment such as gold plating as necessary.

Each conductive material (11) is preferably an electrically conductive and elastic wire 1, such as scale bronze wire, and the cross-sectional shape of the wire is circular, oval, triangular, square, rectangular, etc.
It may be a trapezoid or a very flat rectangle, and in the embodiment, it is circular.

The first base body (20) has a recess (in which one half (lower side in the example diagram) of the intermediate fixed body (13) of the contact member (10) is fitted from the plane where the conductive materials (11) are arranged.
21) and a plurality of grooves (22) and (23) into which the rear half of each conductive material (11) is fitted, on both sides perpendicular to the longitudinal direction of the recess (2I).

In the inner extension direction of each inner groove (23), an elongated recess (24) is provided perpendicular to that direction, and a pair of elongated recesses (24) are provided at the mouth ends of the recess (24), facing inward to each other and forming a V-shaped cross section. The elastic pieces (25a) (25b) of each groove (23
) (see Figure 2).

Note that the recess (24) is formed by the elastic pieces (25a) (25b).
Although it is a hole to form a sip, it may be a step or a recess functionally.

Furthermore, a groove (26) extending from the base end of each elastic piece (25b) in the extending direction is provided at the front end of each elastic piece (25b) in the inner extending direction of each groove (23).

Each groove (26) terminates in a lip (27a) of a hole (27) provided orthogonally to the respective groove (26).

Each groove (26) extends from the base end of each elastic piece (25b) to a hole (
The hole (27) becomes gradually deeper toward the mouth edge (27a) of the groove (27), and extends in the direction of extension of the groove bottom (26a).
The outer part of the opposite wall (27b) with the groove (26) (
(lower side in the drawing) is a slope (27c), and the outside (lower side in the drawing) of the hole (27) is widened (see Figure 2)
.

The first base body (20) has a rectangular shape with a flat thickness, and has engagement grooves (28a) and engagement steps at its four corners for engaging with the second base body (30). (28b) is provided.

The base body (30) of @2 is overlapped with the first base body (20) so that their inner surfaces are brought into close contact with each other, and
In order to maintain the adhesion state, the first base (2
0) and an engaging claw (38b) are provided. Note that this connection may be screwed.

When the first and second base bodies (20) (30) are overlapped, the recesses (21) and grooves (22) of the first base body (20)
Where it faces (23), there is a corresponding recess (31)
and grooves (32) and (33) are provided on the inner surface of the second base body (30).

The second base body (30) also has an elastic piece (25a) (
25b) is provided with a recess (34) that is slightly deeper than the plate thickness of the connection end (41) of the film-based printed wiring board or the film-based flexible flat ribbon cable (40), etc. ing.

The recess (34) extends inwardly from the groove (32) (33) and continues to the end surface (30a) of the second base (30).

The connector (A) is made up of three components: the contact member (lO), the first base body (20), and the second base body (30).
40), and as shown in FIGS. 2 to 4, the contact member (10) and the ribbon cable (40) are connected to the first and second
It is used by assembling it in a 1-inch shape sandwiched between two bases (20) and (30).

The following will explain the assembled use state shown in FIGS. 2 to 4. The intermediate fixing body (13) of the contact member (10)
are the recesses (21) (31) of both bases (20) (30)
The conductive material (11) that fits into the intermediate fixing body (13) and protrudes from both sides has grooves (22) and (23), respectively.
(32) Fits into (33) and connects the intermediate fixing body (I3) of the contact member (10) and the conductive material (11) in its vicinity.
) are closely fixed to both base bodies (20) and (30).

Contact member (10) extending from each groove (23) (33)
) is the contact piece (11a) of the eight-shaped elastic piece (25
a) Fit into the groove (26) while straddling the opposed free ends of (25b), and the tip fixing body (12) at the tip of the contact piece (11a) is connected to the slope of the hole (27). (2
7a).

A contact piece (lla) spanning the elastic piece (25a) (25b)
) and the bottom wall of the recess (34) in the second base (30) (
34a), the connecting end (41) of the flexible flat ribbon cable (40) is inserted with the conductive foil (42) facing the contact piece (lla), and in this part, the contact piece (Ila) An electrical connection is made between the conductive foil (42) and the conductive foil (42).

The contact piece (lla) itself has elastic force to press against the conductive foil (42), and the elastic force is different from each contact piece (lla).
Since it acts almost perpendicular to the connected plane of Lla),
It does not interact with the elastic force of other contact pieces (lla). In particular, if the axial connection between the tip fixing body (12) and the conductor (11) is not strong, no interaction occurs at all.

The elastic pieces (25a) (25b) are the contact pieces (11a).
), and the contact piece (lla
Since there are pressurizing points at the tips of the free ends that are slightly apart in the axial direction of the contact piece (
lla) is pressed against the conductive foil (42) to increase contact reliability.

The contact piece (lla) fits into the groove (23) and the groove (26) at the end where it is stretched over the elastic pieces (25a) (25b), thereby making contact with the conductive foil (42). The position (pitch) of the piece (11a) is secured,
Depending on the contact with the conductive foil (42), the contact piece (lla
) prevents conductive ff1 (42) from escaping in the width direction.

As a result, each conductive foil (
Even if the pitch of the conductive foil (42) is small and the width of the conductive foil (42) is narrow, the pressurized contact piece (l
la) can ensure reliable contact without escaping from the width of the conductor 1 (42) and coming off.

Figures 5 and 6 show specific examples of how the connector according to the present invention is used, and Figure 5 shows a connector for connecting a flexible flat ribbon cable (40) to a conventional terminal connector (B). This is an example using the connector (A).

The length of each conductive material (11) extending from the intermediate fixing body (13) to the opposite side of the contact piece (11a) is the length of the conductive material led out from the groove (22). (11) is
The line pitch can be changed and bent freely, and by using this, each conductive material (11) can be soldered to a terminal cable connector with a terminal pitch different from the line pitch of the ribbon cable (40). If necessary, the periphery thereof is fixed by molding with an insulating synthetic resin material. In addition, if resin molding is not used, each conductive material (
11) Cover with an insulating sleeve.

Figure 6 shows the groove (22) in the thick printed wiring board (C).
This is an example in which the conductive materials (11) derived from the above are directly connected at the same pitch. In this case, each conductive material (
11) is firmly fixed in the axial direction with the intermediate fixing body (13), and the intermediate fixing body (13) is firmly fixed to the base body (2).
0) (30), the connector (A) is easily fixed by simply soldering the conductive material (11) to the connection round of the printed wiring board (C).

(Other Embodiments) FIGS. 7 and 8 show a second embodiment according to the present invention. In the embodiment described below, the first embodiment shown in FIGS. Only the parts that differ from the example will be explained.

The connector (A') of the second embodiment has a first base body (20'
) is the only change, and the other second base body (30) and contact member (10) are the same as in the first embodiment.

The same reference numerals as in the first embodiment are used, and the same reference numerals are used for the same parts in the first base body (20') of the second second embodiment as in the first embodiment. .

The same applies to the third embodiment shown in FIGS. 9 and 10.

Grooves (23) and grooves (26) in the first base (20')
The elastic piece (25") of the first embodiment is placed in the recess (24") between
a) Instead of (25b), an elastic material (25') with a solid interior such as rubber or soft plastic is fitted, and its upper surface slightly protrudes from the inner surface of the base (20').

Each contact piece (11a) of the contact member (10) is stretched over the elastic member (25'), and the ribbon cable (4
0) is pressed into contact with the conductive foil (42).

The elastic material (25') does not have a specific pressure point, but helps increase the contact pressure evenly within its width, and as shown in FIG. 8, between each adjacent contact piece (lla). , the film base (43) of the ribbon cable (40)
) and pressurizes it.

Thereby, the film base (43) is attached to the contact piece (ll
Regardless of the contact pressure in a), the ribbon cable (
40) cannot be easily removed from the connector (A').

In this second embodiment, since the finely shaped elastic pieces (25a) (25b) are not necessary, the first substrate (
20' ) is easy to mold, and the contact piece (ll
a) Products with non-standard pitches can be provided at low cost, and other design changes can be easily made.

Further, the first elastic member (25') can always have a constant shape regardless of the pitch between the contact pieces (lla), and can be easily replaced when the elastic force deteriorates.

FIG. 9 and FIG. 1O show the third embodiment,
The connector (A”) of this embodiment has a contact member (10)
The material of the tip fixing body (12) is rubber or soft plastic material, and the hole (27) at the end of the groove (26) in the first base body (20) of the first embodiment is made of a bottomed hole. A first base body (20") of a different structure has a concave (27") and a boat bottom shape in which the groove bottom (26a") of each groove (26"') is gradually deepened and then gradually shallowed. ”) is used.

The recess (27') in the base body (20") has an elastic piece (
25a) Above where it spans (25b) (on the drawing)
The tip of the contact piece (lla) is curved convexly and curved convexly downward at the groove (26') to form an S-shape.
12”) is fitted.

When the tip fixing body (12'') fitted into the recess (27'') is not pressurized, the side surface of the body (20''')
When connecting the ribbon cable (40), the connecting end (41) of the ribbon cable (40) is connected by using the elastic force of the tip fixing body (12). Then, the second base body (30) is compressed and gripped.

In the case of the third embodiment, the effect of gripping the ribbon cable (40) can be obtained in addition to the contact pressure of the contact portion, as in the second embodiment.

Furthermore, in this embodiment, the tip fixing body (12)
is firmly fixed in the axial direction of the conductor (11), each contact piece (
11a) has the function of individually separating the elastic forces for obtaining contact pressure.

That is, the S-shaped contact piece (lla) connects the top of the curved part in the groove (26''') to the groove bottom (26a'').
By avoiding contact with the contact area, the curved part can have a free curvature according to the contact state of the contact part, and therefore each contact piece (11a) has its own unique curvature, regardless of the contact state of the contact part. Contact action can be performed using contact pressure.

(Other Modifications) In the first to third embodiments described above, the second base body (30) also has grooves (32) (33) and recesses (31).
, but the first corresponding
Base body (20) (20') (20' grooves (22
) (23) and the recess (21) are deepened so that the seam between the first and second bases corresponds to the surface of the bottom wall (31a) in FIG. It is also possible to make the inner surface of the second base body (30) a flat surface and to form the second base body (30) into a simple flat plate shape.

Further, the fixing force of the tip fixing body (12) of the contact member (10) is such that the contact pieces (lla) do not become uneven with each other before assembly, and a very strong bonding force is not required. Moreover, after assembly, the degree of bonding of the conductive material (11) in the axial direction is better if there is less bonding force in the axial direction in order to disperse each elastic force, so in addition to resin molding,
The contact pieces (lla) may be fixed using adhesive tape or the like to maintain parallelism between the contact pieces (lla).

Further, the intermediate fixed body (13) of the contact member (10) is
Although the intermediate fixing body (13) has been described as a single piece, a plurality of intermediate fixing bodies (13) may be provided, and accordingly, the intermediate fixing body (13) may be provided in a plurality.
Either increase the number of recesses (21) (31), etc. in the fixing body (20) (30) into which the connector (13) is fitted, or make changes as appropriate, or extend the increased amount to the outside of the connector (A). You can leave it there.

Furthermore, the convex elastic pieces (26a) (26b) provided on the first (20) in the first embodiment can be used without affecting the contact action even if one of them is omitted. be able to.

(Operations and Effects of the Present Invention) As described above, according to the present invention, it is possible to provide a connector with a simple structure and three component parts, and this connector has a film-based printed wiring. The present invention can also be sufficiently applied to flexible flat ribbon cables based on a substrate or a film base, where the pitch between connection terminals is extremely small.

Further, all three components of the connector according to the present invention can be made by resin molding, and since assembly is easy, it can be provided at a very low cost.

In particular, the structure of the contact is simple, the manufacturing process is small, and only one type of wire material is needed, and
Since it does not require processing that requires time and effort and high precision, such as cutting, punching, drawing, bending, etc., it can be manufactured at low cost, and the present invention allows for efficient use of conductive materials, which are the most expensive among connectors. According to , it is close to 100%,
This also helps keep manufacturing costs low.

Further, the contact portion of the connector is usually plated with gold, but the contact member (10) according to the present invention
Each contact piece (11a) to be plated is connected to an integral structure and aligned in one direction, and is made of a relatively long conductive material (ti), so that the plating process is easy and the plating process area is It is also easy to limit the amount of metal to the contact piece (lla), and the effect of reducing the amount of expensive gold used can also be obtained.

[Brief explanation of the drawing]

The figure shows an embodiment of the invention. FIG. 1 is an exploded perspective view showing a first embodiment of the connector according to the present invention. FIG. 2 is a vertical sectional view of the main part of the embodiment in FIG. FIG. 4 is a sectional view taken along the line IV--IV in FIG. 2; FIG. 5 is a perspective view showing an example of the usage state of the connector according to the present invention FIG. 7 is a perspective view showing another example of the usage state of the connector according to the present invention. FIG. 8 is a vertical sectional view similar to FIG. 2 showing the second embodiment of the connector according to the present invention. 9 is a vertical sectional view similar to FIG. 2 showing a third embodiment of the connector according to the present invention; FIG. 10 is a cross-sectional view taken along the X-XpFr plane in FIG. It is a diagram. (A) (A') (A") Connector (10) Contact member (11) Conductive material (lla) Contact piece (12) Tip part fixing body (13) Intermediate part fixing body (20) First base body ( 21) Dent (22) (23)
Groove (24) Recess (25a)
(25b) Elastic piece (26) Groove (
26a) Groove bottom (27) hole
(27a) Mouth edge (27b) Wall (27c) Slope (2ga) Engagement groove (28b) Engagement step (30) Second base (31) (34) Recess (32) (3
3) Groove (38a) Connecting leg (38
b) Engagement claw (40) Ribbon cable (41
) Connection end (42) Conductive foil Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10

Claims (13)

[Claims] (1) Connecting and fixing at least one intermediate portion of a plurality of parallel conductive wires with a horizontal rod-shaped intermediate portion fixing member molded with an insulating synthetic resin material and perpendicular to each conductive material; Near one tip of each conductive material, in order to prevent deformation of the conductive material juxtaposed surface of each contact piece between the tip and the intermediate fixed part, the conductive materials are kept parallel and adjacent to each other. , a contact member connected with an appropriate tip fixing member, a recess into which the intermediate fixing member of the contact member is fitted, and each conductive material is fitted into both sides of the recess perpendicular to the longitudinal direction. A plurality of grooves, each contact piece portion of the contactor member is spanned over, and an elastic means provided in an extending direction of the groove for pressing the contact piece portion against the other base body; At least one of the base bodies is provided with grooves in which the respective contact pieces are fitted in the vicinity of the tip of the contact piece where the tip of the contact piece exceeds the elastic means, and A connector comprising a first base body and a second base body which are appropriately connected by overlapping each other with a terminal member to be connected therebetween. (2) The connector according to claim (1), wherein the contact member has a plurality of intermediate fixing bodies. (3) The connector according to claim (1) or (2), wherein the tip end fixing body of the contact member is molded from hard plastic. (4) The connector according to claim (1) or (2), wherein the tip end fixing body of the contact member is an elastic material molded from rubber or soft plastic. (5) The connector according to claim (1) or (2), wherein the tip fixing body of the contact member is an adhesive tape. (6) The connector according to any one of claims (1) to (5), wherein the elastic means over which the contact piece is stretched is an elastic piece formed on the base body and having a V-shaped cross section. (7) Claims (1) to (5) in which the elastic means on which the contact pieces are stretched have a structure in which one of the elastic pieces formed on the base body and having a V-shaped cross section is omitted.
) A connector described in any of the above. (8) The connector according to any one of claims (1) to (6), wherein the elastic means over which the contact piece is stretched is made of rubber or soft plastic appropriately fitted into the base body. (9) The first and second base bodies are provided with grooves and recesses into which the intermediate fixed body of the contact member and the conductor in the vicinity thereof are fitted, respectively. 8) The connector described in any of paragraphs 8). (10) Claims (1) to (1) in which the groove bottom of the groove into which the vicinity of the tip of the contact piece in the contact member is fitted is gradually deepened toward the tip of the contact. 9) The connector described in any of paragraphs 9). (11) The groove bottom of the groove into which the vicinity of the tip of the contact piece portion of the contact member is fitted is shaped like a boat bottom.
The connector according to any one of items 1) to (9). (12) A method according to any one of claims (1) to (11), in which the contact piece of the contact member is bent into an S-shape when pressing the connected terminal member. connector. (13) While bending the contact piece part of the contact member into an S-shape to press the connected part terminal member, pinch and grip the connected part terminal member with the appropriate position of the tip fixing body of the contact member. Claims (1) to (1)
The connector described in any of paragraph 2).