JPH0412481A - Card edge type connector - Google Patents

Abstract

PURPOSE:To make a contact thin by overlapping the first and second contacts with the same required shape via an insulating sheet, and facing contact sections to each other. CONSTITUTION:The first and second contacts 31, 32 with the same shape folded with a slender belt-shaped metal plate into an L-shape edge-wise are overlapped at base sections 38 via an insulating sheet 44, then a contact 30 thinned in the flat-wise direction and formed with a contact section 40 at the tip is obtained, and a card edge type connector with a fine pitch can be easily formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a card edge type connector.

[Conventional technology] There are many forms of card edge type connectors.

What is shown in FIGS. 5a to 5C is an example of an electrode arrangement having integrated electrodes on both sides.

Reference numeral 10 denotes the entire contact, for example, a known type called a tuning fork type. 12 is a contact portion, and 14 is a lead portion.

16 is the whole support flock, and the insulating wall 2 of its main body 18
The contact 10 described above is fixed in the correct size in the hole 22 partitioned by 0. The lead portion 14 of the contact 10 exits through a hole 26 provided in the bottom surface 24 of the holding block 16.

As is well known, the double-sided contact 10 has the same function as the single-sided contact, and one contact 10 connects to one electrical signal.

[Problems to be Solved by the Invention] As devices become more sophisticated and functional, the number of signals to be connected to connectors is increasing dramatically.

For this reason, connectors are required to be made even more compact, but this is difficult to put into practical use with current technology.

[Means for solving the WIA problem] The contact 30 has the following structure (Fig. 1a,
(see FIG. 1b) into the holding block 16. That is, the contact 30 consists of (a) a first contact 31 and a second contact 32; (b) these have the same shape and size; , one side thereof is an arm 36 and the other side is a base 38, and a contact portion 4 is provided on the edgewise inner side surface of the tip of the arm 36.
0, and (1) these are such that the contact portions 40 face each other, and only the base portions 38 are overlapped in a flat-wise manner insulated from each other. Edgewise refers to the direction parallel to the surface of the board, and flatwise refers to the direction perpendicular to the surface of the board (JIS Glossary).

[Function] (1) Both the first contact 31 and the second contact 32 are each made of a long and narrow strip-shaped metal plate edgewise.
Since the contact 30 is formed by folding the contacts 30 in a flat width direction, the contact 30 can be made thinner in the flat width direction.

(2) Since the first contact 31 and the second contact 32 are connected only at the base portion 38, the tips of both arms 36 can be elastically displaced edgewise.

(3) Since the first contact 31 and the second contact 32 are insulated from each other at the base 38, the contact 30 is used as a double-sided type.

[Example] (Figures 1a to 2) This invention is characterized by contacts.

30 indicates the entire connector.

This is composed of a first contact 31, a second contact 32, and an insulating sheet 44.

The first contact 31 and the second contact 32 are exactly the same. 34 is its main body, which is made by bending an elongated strip-shaped metal plate edgewise into an L shape. For purposes of explanation, one longer side will be referred to as the arm 36, and the other shorter side will be referred to as the base 38.

A contact portion 40 is formed on the edgewise inner side of the tip of the arm 36 (on the side where the base portion 38 is located).

Further, for example, a lead portion 42 is made to protrude from the center of the base portion 38 in a direction opposite to the arm 36.

As described above, the first contact 31. Second contact 32
is composed of

Its material is the same as general contact materials such as copper alloy.

To give an example of dimensions, the thickness is about 0.3 mm, and the arm 36
The length of is about 3 to 5 mm.

The contact portions 40 of the first contact 31 and the second contact 32 are arranged to face each other, and both base portions 3
8 are stacked on top of each other with an insulating sheet 44 in between and adhered to each other to form one set of contacts 30.

Note that, in reality, a hot-melt adhesive sheet is sandwiched and stacked between each base 38 and the insulating sheet 44, and the adhesive is cured by applying heat and pressure.

The material of the insulating sheet 44 may be, for example, polyester or polyimide, and the thickness may be approximately 0.1 mm.

Since the first contact 31 and the IF, second contact 32 are connected only partially at the base 38, the tips of both arms 36 can be elastically displaced edgewise independently.

The above-mentioned contact 30 is made into a shape that can be inserted into the hole 22 of the conventional holding flock 16, and is press-fitted into the hole 22 as shown in FIG. 2 to form a connector.

Contact 30 acts as a double-sided type.

When the board 50 is inserted into this connector (see Figure 2),
One contact portion 40 contacts the 8-conductor terminal 52 on one side, and the other contact portion 40 contacts the terminal 54 on the opposite side, each independently leading to the outside through the lead portion 42.

Note that the lead portion 42 may be made to protrude from the end of the base portion 38 as shown in FIG. 3.

Examples of use are shown in FIGS. 4a and 4b.

FIG. 4a shows an example of the case of surface real phase, and 56 is a substrate.

Further, in FIG. 4b, contacts 30 of the present invention are arranged in two rows within one holding block 16.

[Effects of the Invention] (1) As described above, both the first and second contacts are made by bending a long and thin strip-shaped metal plate into an L shape edgewise, and stack them flatwise to form a contact. Therefore, the contact can be made thinner in the flat width direction.

It is also possible to make double-sided contacts with approximately the same thickness as conventional double-sided integrated contacts.

Therefore, compared to conventional double-sided integrated connectors,
Twice as many signals can be connected while keeping the adjacent pitch the same as before.

Furthermore, there is no need to reduce the thickness of the insulating wall, which is a problem when the pitch is made finer.

(2) As a countermeasure against EMI, there are many cases in which the signal and ground are bare connected, but the two signals are assigned to the first contact 31 and the second contact 32, which are insulated from each other, and the dielectric constant and thickness of the insulating sheet are・By controlling the impact and matching the characteristic impedance,
It is possible to create a structure in which the impedance mismatching portion is made as short as possible.

Furthermore, by setting the capacitive reactance to a large value, it is also possible to provide a filter effect.

[Brief explanation of drawings]

Figures 1a to 4b relate to the present invention, where Figure 1a is an explanatory diagram of the contact 30, Figure 1b is an exploded explanatory diagram of the contact 30, Figure 2 is an explanatory diagram of a cross section of the connector, and Figure 3 is an explanatory diagram of the contact. 30, FIGS. 4a and 4b are explanatory diagrams of the state of use, FIG. 5a is a schematic plan view of an example of a conventional connector, and FIG. 5b is an explanation of cross section B in FIG. 5a. FIG. 5C is an explanatory diagram of the bottom surface. lO: Contact 14: Lead portion 18: Main body 22: Hole 26: Hole 31: First contact 34: Main body 38: Base 42: Lead portion 50: Substrate 12: 16: 20 = 24: 30 Nid 32: 36: 40: 44: 52° Contact portion holding block insulation wall bottom contact 2nd contact arm contact portion insulation sheet 54: Conductor terminal

Claims (1)

[Claims] The contact includes; (a) a first contact and a second contact; (b) the first contact and the second contact are
They are of the same shape and size, and each is made by bending a long, thin strip-shaped metal plate edgewise into an L shape, with one side serving as an arm and the other side serving as a base, and each edgewise inwardly located at the tip of the arm. (c) These first contacts and second contacts are
A card edge type connector, wherein the contact portions face each other, and only the base portions are overlapped flatwise in a mutually insulated state.