JP2001035571A - Narrow pitch terminal connector and molding method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a narrow-pitch, multi-pin moving contact type connector. SOLUTION: A terminal separation base 26, where slots 38 having a slot width (w) slightly larger than the width (d) of terminals 32 extending in parallel with one another along a terminal carrier at a predetermined pitch are recessively formed at the same pitch as that of the terminals 32, is subject to primary molding. When the terminal carrier is correctly positioned with respect to the terminal separation base, terminal contact parts 18 are matched to the middle of respective terminal partitioning walls 35 of the terminal separation base, form a gap δ and are loosely inserted in an elastically deformable manner. The terminals 32 are insert-molded in a terminal block frame 15 along with the terminal separation base, and the terminal contact parts 18 are fixed by keeping them in a freely fitted form. The respective terminals 32 are separated and made independent, by cutting off the terminal carrier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used for circuit connection of electronic equipment, and more particularly to a female terminal connector having a large number of movable contacts arranged in a line in a dense manner.

[0002]

2. Description of the Related Art In recent years, with the spread of small-sized communication devices such as mobile phones and mobile devices and personal computers, miniaturization and weight reduction have been promoted based on the design concept of easy carrying, and these drive units, memories, input / output units As for the connector that connects independent parts such as interface, display, etc., of course, many terminals densely packed in a narrow space due to miniaturization must be reliably insulated from each other, and the female connector connector piece Requires a structure that elastically contacts the male connector terminal to absorb mechanical errors, and allows elastic deformation to ensure electrical conduction by accurate contact.

In order to hold the terminal intervals accurately and fix the terminals, there is a means for providing a groove into which the terminal base can be press-fitted, and press-fitting the terminal base slightly wider than the terminal contact portion. When applied to a connector having a large interval and a large number of terminals, stress displacement due to press-fitting of the terminal base is accumulated, and the terminal block is greatly deformed. Further, the fixing means by welding causes thermal deformation due to uneven temperature distribution in the terminal block. On the other hand, the fixing means using an adhesive requires processes such as coating, drying and curing in addition to the terminal block injection molding process. Moreover, all of these means require a considerable amount of time and labor and are not suitable for streamlining the process.

[0004]

Therefore, insert molding is selected as a means for overcoming the problem of elastically deforming a large number of terminals in a narrow space. For this purpose, it is necessary to reliably provide a gap between the terminal and the molding wall by a metal mold so that the terminal can be displaced. However, for example, when the pitch between terminals is 0.5 mm, if a wall having a terminal width of 0.2 mm and a thickness of 0.2 mm is formed between terminals, a mold thickness for leaving a gap between the terminal and the formed wall is It is as thin as a 0.05 mm film. As the pitch between terminals becomes smaller, such as 0.4 mm and 0.3 mm, the conditions become more severe, and high precision is required for the shapes and dimensions of the dies arranged in rows according to the number of terminals. Such molds are expensive and the thin walls are susceptible to deformation due to thermal deformation, injection pressure, and external force due to mold release, and are difficult to handle, require careful attention to maintenance and management, and have a short service life. Running costs are inevitable.

An object of the present invention is to provide a low-pitch multi-pin connector with a low-priced die having the same accuracy as the conventional one.

[0006]

In order to achieve the above object, a narrow-pitch terminal connector according to the present invention has a plurality of grooves for accommodating a plurality of terminals of the same shape and size separately and separately. A terminal isolation table formed with a groove width larger than the width and aligned in parallel with the predetermined narrow pitch is formed of an appropriate insulating material, and the terminals are loosely inserted into each of the grooves in a loosely fitting state. While the loosely fitted state is maintained together with the terminal isolation stand, it is fixed by double molding of various shapes using the same insulating material as described above.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a connector according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a connector 10 in which a female connector 12 and a male connector 1 are provided.
FIG. 2 is a cross-sectional view illustrating a state in which No. 4 is connected, and FIG. 2 is a plan view along line 2-2 in FIG. The connector 10 is a connector having a total of 18-pin terminals in which terminals are evenly arranged by 9 pins on both sides, and can connect and disconnect 18 lines at a time.
Although FIG. 1 is enlarged, the actual pitch P between terminals is 0.5 mm or less, for example, 0.4 mm or 0.3 mm. The terminal block 24 of the male connector 14 is fitted into the terminal block frame 15 of the female connector 12, and the terminal contact portion 16 of the male connector 14 elastically contacts the terminal contact portion 18 of the female connector 12 at the junction C, and the electric connection is made. Is electrically conducted. In FIG. 2,
For ease of understanding, the female connector 12 is double-hatched.

Independent printed circuits or flexible flat cables (not shown) are connected to the free ends 20 and 22 on the opposite sides of the terminal contact portions 16 and 18 by soldering or crimping. Therefore, by connecting the circuit in the device independently for each block and connecting with the connector 10 having such a large number of pins, if a failure occurs in any of the independent circuits, only the failed circuit is removed. Since it can be dealt with by disconnecting from the connector 10, repair and inspection and maintenance management become easy, and the cost is reduced because the entire device is not subject to replacement.

The terminal block 24 of the male connector 14 is detachably fitted to the terminal block 26 of the female connector 12 (see arrow A in FIG. 3). As shown in the plan view of FIG. 2, the male connector 14 has terminals 30 each having a constant width d and extending in parallel at a predetermined pitch P, as shown in the sectional view of FIG. The terminal block 24 is bent into a predetermined shape to be formed into a predetermined shape, and is embedded in the terminal block 24 by a known insert mold to restrict displacement and function as a fixed contact.

On the other hand, each terminal 32 of the female connector 12 fixed to the terminal block frame 15 can prevent a short circuit between terminals adjacent to each other at a close position, and in order to assure reliable reliability, each terminal 32 has its own terminal. Groove 38 of terminal isolation stand 26 for isolating and housing
4 (see FIG. 4), and the terminal contact portion 18 of the female connector 12 must elastically contact the terminal contact portion 16 of the fixed male connector 14, so that it is elastically deformed even after insert molding. Flexibility must be ensured.

FIG. 3 shows the connector 10 connected to the female connector 12.
And a sectional view exploded into a male connector 14 and crimped onto a terminal contact portion 16 of the male connector 14 to deform the position D.
1 shows a state in which the terminal contact portion 18 of the female connector 12 located at 1 (two-dot chain line in the figure) is released by the detachment of the male connector 14 and is displaced to the free position D2. As shown in the figure, according to the method of molding a connector according to the present invention, the terminal contact portion 18 of the female connector is elastically deformable even after insert molding.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for forming the female connector 12 shown in FIG. 3 will be described below as an embodiment according to the present invention.
As shown in FIG. 4B, the 30-pin terminal 32, which is bent and formed in a predetermined same shape and the same size in a direction orthogonal to the surface of the terminal carrier 34, as shown in FIG. The terminal carrier 34 is formed at a predetermined width d so as to extend in parallel with each other at a predetermined pitch P from the side edge at a predetermined pitch P at right angles to the long axis direction of the terminal carrier 34.

On the other hand, as shown in FIG. 5A, the grooves 38 are arranged in alignment with the pitch P of the terminals 32 determined by the terminal carrier 34, and the distance (groove width) w between the opposing wall surfaces is determined by the terminal. The groove 3 is set slightly larger than the width d of 32.
A terminal isolation base 36 having a recess 8 is separately formed by injection molding as a primary molding member using a known means with a suitable insulating material. FIG. 5B is a side view of the terminal stand 36.

As shown in FIG. 5, the terminal isolator 26 and the terminal carrier 34 of the primary molding member are set in an insert molding die (not shown), and the position of the terminal carrier 34 with respect to the terminal isolator 26 is referred to as a reference transparent. When accurately positioned using the holes 42, the terminal contact portions 18 of the respective terminals 32 extending from the terminal carrier 34 are loosely inserted in a loosely fitted state in alignment with the grooves 38 formed in the terminal isolation base 36, Maintain a predetermined relationship position. That is, the groove 3 is provided between the adjacent terminals 38.
Each terminal 38 is isolated by a terminal partition wall 35 formed by 8.

Therefore, as shown in FIG. 6, as a second molding, the terminal stand 26 and the terminal 32 are joined together to form the terminal frame 15
Is fixed by insert molding. The terminal contact portions 18 are supported between the terminal partition walls 35 so as to be elastically deformable.
Removes the female connector 12 integrally fixed to the terminal stand frame 15 together with the terminal isolation stand 36 from an insert molding die (not shown). A gap of δ = (wd) / 2 is defined between the terminal contact portion 18 and the wall surface of each terminal partition wall 35. The terminal carrier 34 connecting the terminals 32 is cut off from the cutting line S so that each terminal 32 is separated and independent. FIG. 7 is a plan view of the completed female connector 12 as viewed from above, and the terminal frame 15 formed by secondary molding is indicated by double oblique lines for easy understanding.

[0016]

As described above, according to the narrow-pitch terminal connector according to the present invention, the terminal stand frame which constitutes the connector and the terminal isolating stand which separately holds each terminal so as to be elastically deformable independently are provided. Since it is provided as a primary molding member and insert-molded with each terminal, it is possible to easily insert-mold a female connector in which a large number of terminals are densely packed at an extremely fine pitch between terminals using a normally accurate mold. The relationship between the terminal and the partition wall thickness or gap can be freely set.

[Brief description of the drawings]

FIG. 1 is a sectional view of a narrow-pitch terminal connector according to the present invention.

FIG. 2 is a plan view seen from the back surface along line 2-2 in FIG. 1;

FIG. 3 is an exploded sectional view of a narrow pitch terminal connector according to the present invention.

4A and 4B are diagrams showing a relationship between a terminal carrier and terminals in the narrow pitch terminal connector according to the present invention, wherein FIG. 4A is a partial plan view, and FIG. 4B is a cross section taken along line BB of FIG. FIG.

5A and 5B are illustrations of a terminal isolation stand in the narrow pitch terminal connector according to the present invention, wherein FIG. 5A is a plan view and FIG. 5B is a side view.

FIG. 6 is a plan view for explaining a state in which a terminal isolation stand and a terminal are insert-molded into a terminal block frame of a female connector in the narrow-pitch terminal connector according to the present invention.

FIG. 7 is a plan view of a female connector of the narrow pitch terminal connector according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Connector 12 Female connector 14 Male connector 15 Terminal block frame 16 Terminal contact part (male connector) 18 Terminal contact part (female connector) 24 Terminal block (male connector) 26 Terminal isolator (female connector) 30 Terminal (male connector) 32 Terminal (female connector) 34 Terminal carrier 35 Terminal partition

Claims (2)

[Claims] 1. A connector in which a plurality of terminals having the same shape and dimensions are arranged at a narrow pitch, wherein a plurality of grooves for individually receiving and accommodating the terminals are formed with a groove width wider than the width of the terminals. The terminal isolation bases arranged in parallel with the predetermined narrow pitch are formed of an appropriate insulating material, and the terminals are loosely inserted into each of the grooves in a loose fit state, respectively. A narrow pitch terminal connector characterized by being fixed by double molding of various shapes made of the same insulating material as above while holding. 2. A method of molding a connector in which a plurality of terminals having the same shape and dimensions are arranged at a narrow pitch, wherein a plurality of grooves for individually isolating and accommodating the terminals are formed with a groove width wider than the width of the terminals. A first molding step of forming and forming a terminal isolation table formed in parallel with the predetermined narrow pitch with a suitable insulating material,
Loosely insert the terminal into the groove of the terminal isolation table in a loose fit state,
A method of molding a narrow-pitch terminal connector, comprising: a second molding step of fixing the same insulating material together with the terminal isolation table while maintaining the loosely fitted state.